A method of producing a granulated product from photopolymer printing plate materials. The method includes the steps of (a) sorting the photopolymer printing plate materials based on an identifiable property, wherein the photopolymer printing plate materials comprise one or more photopolymer layers; (b) subjecting the photopolymer printing plate materials to UV-C light from a UV-C light source for a period of time, whereby the photopolymer printing plate materials are rendered less tacky and more brittle; (c) grinding the photopolymer printing plate materials to particles; and (d) screening the particles to remove particles above a certain size and create the granulated product.
A method of producing a granulated product from photopolymer printing plate materials. The method includes the steps of (a) sorting the photopolymer printing plate materials based on an identifiable property, wherein the photopolymer printing plate materials comprise one or more photopolymer layers; (b) subjecting the photopolymer printing plate materials to UV-C light from a UV-C light source for a period of time, whereby the photopolymer printing plate materials are rendered less tacky and more brittle; (c) grinding the photopolymer printing plate materials to particles; and (d) screening the particles to remove particles above a certain size and create the granulated product.
A method of flood exposing a photocurable printing blank to actinic radiation from a UV light source to crosslink and cure the photocurable printing blank. The photocurable printing blank includes a support, at least one photocurable layer upon the support, wherein the at least one photocurable layer is capable of being selectively crosslinked and cured upon exposure to actinic radiation at a desired wavelength. The photocurable printing blank is subjected to flood exposure by positioning the photocurable printing blank in an exposure unit that includes a plurality of UV LED light tubes arranged at a distance from a surface of the photocurable printing blank.
A method of flood exposing a photocurable printing blank to actinic radiation from a UV light source to crosslink and cure the photocurable printing blank. The photocurable printing blank includes a support, at least one photocurable layer upon the support, wherein the at least one photocurable layer is capable of being selectively crosslinked and cured upon exposure to actinic radiation at a desired wavelength. The photocurable printing blank is subjected to flood exposure by positioning the photocurable printing blank in an exposure unit that includes a plurality of UV LED light tubes arranged at a distance from a surface of the photocurable printing blank.
The present disclosure is directed to a system and method configured for curing non- reactive photopolymer collected by an absorbent blotting material during thermal processing of flexographic printing elements. Uncured non-reacted portions of the photopolymer are removed by contacting the one or more layers of photopolymer with the web of absorbent blotting material at an elevated temperature to soften or liquefy the uncured non-reacted portions of the one or more layers of photopolymer and absorb the softened or liquefied uncured non-reacted portions into the absorbent web of absorbent blotting material. The web of absorbent blotter material containing the absorbed softened or liquefied non-reacted portions of the photopolymer is exposed to actinic radiation from the one or more UV light sources to crosslink and cure the softened or liquefied non-reacted portions of the photopolymer.
The present disclosure is directed to a system and method configured for curing non-reactive photopolymer collected by an absorbent blotting material during thermal processing of flexographic printing elements. Uncured non-reacted portions of the photopolymer are removed by contacting the one or more layers of photopolymer with the web of absorbent blotting material at an elevated temperature to soften or liquefy the uncured non-reacted portions of the one or more layers of photopolymer and absorb the softened or liquefied uncured non-reacted portions into the absorbent web of absorbent blotting material. The web of absorbent blotter material containing the absorbed softened or liquefied non-reacted portions of the photopolymer is exposed to actinic radiation from the one or more UV light sources to crosslink and cure the softened or liquefied non-reacted portions of the photopolymer.
A method of producing a granulated product from photopolymer printing plate materials. The method includes the steps of (a) sorting the photopolymer printing plate materials based on an identifiable property, wherein the photopolymer printing plate materials comprise one or more photopolymer layers; (b) grinding the photopolymer printing plate materials to particles; and (c) screening the particles to remove particles above a certain size and create the granulated product.
A method of producing a granulated product from photopolymer printing plate materials. The method includes the steps of (a) sorting the photopolymer printing plate materials based on an identifiable property, wherein the photopolymer printing plate materials comprise one or more photopolymer layers; (b) grinding the photopolymer printing plate materials to particles; and (c) screening the particles to remove particles above a certain size and create the granulated product.
The present disclosure relates generally to signal encoding for flexographic printing plates. One aspect is a flexographic, photopolymer printing plate having transparent layers to allow encoded signal printed or laser ablated thereon to be detectable from both sides of the printing plate. Another aspect is a flexographic, photopolymer printing plate having an encoded signal formed in a photocured layer. Still another aspect is a system for tracking such printing plates, including managing location, print impression count, location tracking, etc. Other aspects are described as well.
G06K 7/14 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
G06K 7/10 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation
B41N 99/00 - Subject matter not provided for in other groups of this subclass
B41N 1/12 - Printing plates or foilsMaterials therefor non-metallic other than stone
10.
SYSTEM FOR THERMAL DEVELOPMENT OF FLEXOGRAPHIC PRINTING PLATES
The present disclosure is directed to a thermal developing assembly that is configured to reduce (or eliminate) the reactivity of contaminants and/or unreacted photosensitive material associated with forming a relief image on a photosensitive printing element during thermal development. The thermal developing assembly is configured to reduce (or eliminate) the reactivity of a byproduct associated with forming a relief image on a photosensitive printing element, the byproduct including but not limited to, contaminants within vapors (e.g., fumes), contaminants within condensate, unreacted photosensitive material, and combinations thereof.
The present disclosure relates generally to signal encoding for flexographic printing plates. One aspect is a flexographic, photopolymer printing plate having transparent layers to allow encoded signal printed or laser ablated thereon to be detectable from both sides of the printing plate. Another aspect is a flexographic, photopolymer printing plate having an encoded signal formed in a photocured layer. Still another aspect is a system for tracking such printing plates, including managing location, print impression count, location tracking, etc. Other aspects are described as well.
B32B 7/03 - Layered products characterised by the relation between layers Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties Layered products characterised by the interconnection of layers with respect to the orientation of features
C08F 299/02 - Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates
G03C 5/08 - PhotoprintingProcesses or means for preventing photoprinting
A method of producing a photocured structure comprising a backing layer for coupling to a relief image printing plate or as an integral all-in-one structure comprising a backing layer and a relief image printing layer. The photocured structure may be formed using a continuous liquid interphase method or three-dimensional plating to selectively crosslink and cure a photocurable composition. The backing layer may comprise a lattice or series of openings of the lattice where the placement and density of the openings is controlled.
B41F 5/24 - Rotary letterpress machines for flexographic printing
B41N 1/12 - Printing plates or foilsMaterials therefor non-metallic other than stone
G03F 7/033 - Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
A method of producing a photocured structure comprising a backing layer for coupling to a relief image printing plate or as an integral all-in-one structure comprising a backing layer and a relief image printing layer. The photocured structure may be formed using a continuous liquid interphase method or three-dimensional plating to selectively crosslink and cure a photocurable composition. The backing layer may comprise a lattice or series of openings of the lattice where the placement and density of the openings is controlled.
G03F 7/033 - Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
B41N 1/12 - Printing plates or foilsMaterials therefor non-metallic other than stone
B41F 5/24 - Rotary letterpress machines for flexographic printing
14.
System for thermal development of flexographic printing plates
The present disclosure is directed to a thermal developing assembly that is configured to reduce (or eliminate) the reactivity of contaminants and/or unreacted photosensitive material associated with forming a relief image on a photosensitive printing element during thermal development. The thermal developing assembly is configured to reduce (or eliminate) the reactivity of a byproduct associated with forming a relief image on a photosensitive printing element, the byproduct including but not limited to, contaminants within vapors (e.g., fumes), contaminants within condensate, unreacted photosensitive material, and combinations thereof.
A method of preparing a film negative including the steps of dispersing a UV ink in a desired pattern on a UV printing substrate; and curing the UV ink with a source of actinic radiation to crosslink and cure the UV ink and create the UV printed polymer layer in the desired pattern. The UV ink is at least substantially solvent-free and printing substrate does not contain an adhesive layer or an ink-receptive layer and is not been modified to be ink-receptive. The film negative may be used in a process of making a flexographic printing element.
A method of preparing a film negative including the steps of dispersing a UV ink in a desired pattern on a UV printing substrate; and curing the UV ink with a source of actinic radiation to crosslink and cure the UV ink and create the UV printed polymer layer in the desired pattern. The UV ink is at least substantially solvent-free and printing substrate does not contain an adhesive layer or an ink-receptive layer and is not been modified to be ink-receptive. The film negative may be used in a process of making a flexographic printing element.
A method of creating an image film negative capable of masking non-image areas of one or more layers of liquid photopolymer during a step of imagewise exposing the one or more layers of liquid photopolymer to actinic radiation. The method includes the steps of (a) providing an image film negative comprising a negative of an image on the image film negative, wherein the negative of the image comprises a pattern of opaque areas; and (b) inkjet printing a filtering layer on portions of the image film negative not covered by the pattern of opaque areas, wherein the portions of the image film negative comprise portions where it is desirable to modulate intensity of actinic radiation in a subsequent exposure step.
A method of creating an image film negative capable of masking non-image areas of one or more layers of liquid photopolymer during a step of imagewise exposing the one or more layers of liquid photopolymer to actinic radiation. The method includes the steps of (a) providing an image film negative comprising a negative of an image on the image film negative, wherein the negative of the image comprises a pattern of opaque areas; and (b) inkjet printing a filtering layer on portions of the image film negative not covered by the pattern of opaque areas, wherein the portions of the image film negative comprise portions where it is desirable to modulate intensity of actinic radiation in a subsequent exposure step.
A liquid photopolymer resin composition comprising: a) at least one ethylenically unsaturated prepolymer; b) at least one ethylenically unsaturated monomer; c) at least one photoinitiator; and d) at least one polythiol and a method of using the same to make soft relief image printing plates that have good tensile strength and elongation.
G03F 7/035 - Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polyurethanes
G03F 7/027 - Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
C08F 291/00 - Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds according to more than one of the groups
B41N 1/12 - Printing plates or foilsMaterials therefor non-metallic other than stone
Laser-imageable flexographic printing plates and a method of making same are disclosed. A thin masking layer comprising insoluble particles is laminated to a photopolymer layer. The insoluble particles in the masking layer roughen the photopolymer surface when the masking layer is laminated to the photopolymer surface. The masking layer is selectively ablated from the photopolymer using a laser operating at a selected wavelength to create an in situ negative. The resulting negative can be subjected to typical UV flood exposure and development.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
G03F 7/11 - Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
21.
Flexographic printing plate with improved storage stability
A method of making a relief image printing element comprising a plurality of relief printing dots. The method includes the steps of imagewise exposing at least one photocurable layer to actinic radiation to selectively crosslink and cure portions of the at least one photocurable layer; and developing the relief image printing element to separate and remove uncrosslinked and uncured portions of the at least one photocurable layer to reveal the relief image therein. The at least one photocurable layer includes a photoinitiator exhibiting a quantum yield of initiation (Qi) of more than 0.05 at a 365 nm wavelength. The substrate has an optical density from 0.5 to 5 in the wavelength range of 365 nm to 450 nm but preferably allows transmission of from 0.1% to 10% of incident light in the wavelength range of 365 nm to 450 nm.
B41N 1/12 - Printing plates or foilsMaterials therefor non-metallic other than stone
G03F 7/028 - Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with photosensitivity-increasing substances, e.g. photoinitiators
22.
FLEXOGRAPHIC PRINTING PLATE WITH IMPROVED STORAGE STABILITY
A method of making a relief image printing element comprising a plurality of relief printing dots. The method includes the steps of: (a) providing at least one photocurable layer disposed on a substrate, the at least one photocurable layer being capable of being selectively crosslinked and cured upon exposure to actinic radiation, (b) imagewise exposing the at least one photocurable layer to actinic radiation to selectively crosslink and cure portions of the at least one photocurable layer; and (c) developing the relief image printing element to separate and remove uncrosslinked and uncured portions of the at least one photocurable layer to reveal the relief image therein. The at least one photocurable layer comprises (i) an ethylenically unsaturated monomer; (ii) a binder; and (iii) a photoinitiator exhibiting a quantum yield of initiation (Qi) of more than 0.05 at a 365 lira wavelength. The substrate has an optical density from 0.5 to 5 in the wavelength range of 365nm to 450nm but preferably allows transmission of from 0.1% to 10% of incident light in the wavelength range of 365nm to 450nm.
A method of producing a flexographic printing plate using a continuous liquid interphase is provided herein. This method allows for significantly reduced production times and fewer preparation steps compared to standard non-continuous techniques and results in less waste than typical methods for preparing flexographic printing plates. The printing plate provided by using continuous liquid interphase production results in a printing plate with desirable elastomeric elongation, desirable hardness, plate thickness in the range of 0.030 inches to 0.250 inches, and comprises printing dots with desirable characteristics.
A method of producing a flexographic printing plate using a continuous liquid interphase is provided herein. This method allows for significantly reduced production times and fewer preparation steps compared to standard non-continuous techniques and results in less waste than typical methods for preparing flexographic printing plates. The printing plate provided by using continuous liquid interphase production results in a printing plate with desirable elastomeric elongation, desirable hardness, plate thickness in the range of 0.030 inches to 0.250 inches, and comprises printing dots with desirable characteristics.
G03F 7/11 - Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
A photocurable relief image printing blank comprising: (a) a support layer; (b) one or more photocurable layers disposed on the support layer, wherein the one or more photocurable layers comprise: i) a binder; ii) one or more monomers; iii) an alpha-aminoketone photoinitiator; and optionally, iv) an additive selected from the group consisting of phosphites, phosphines, thioether amine compounds, and combinations of one or more of the foregoing; (c) a laser ablatable masking layer disposed on the one or more photocurable layers, the laser ablatable masking layer comprising a radiation opaque material; and (d) optionally, a removable coversheet. Upon exposure and development, the resulting relief image printing element does not degrade if left under ambient lights for an extended period of time.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
G03F 7/031 - Organic compounds not covered by group
A method of producing a relief image or mold from a liquid photopolymer resin, said method comprising the steps of: a) placing an image film onto an exposure glass; b) placing a cover film over the image film and drawing a vacuum c) placing substrate material on a bottom glass d) casting a liquid photopolymer resin layer onto the substrate material; d) laminating a flexible polyester sheet onto a backside of the liquid photopolymer resin layer as the liquid photopolymer resin layer is being cast onto the substrate material; and e) exposing the liquid photopolymer resin layer through the image film to selectively crosslink and cure the photopolymerizable resin layer and form a cured relief image, wherein said depth of the cured relief image is less than the height of the cast liquid photopolymerizable resin.
G03F 7/11 - Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
G03F 7/115 - Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having supports or layers with means for obtaining a screen effect or for obtaining better contact in vacuum printing
A photocurable relief image printing blank comprising: (a) a support layer; (b) one or more photocurable layers disposed on the support layer, wherein the one or more photocurable layers comprise: i) a binder; ii) one or more monomers; iii) an alpha- aminoketone photoinitiator; and optionally, iv) an additive selected from the group consisting of phosphites, phosphines, thioether amine compounds, and combinations of one or more of the foregoing; (c) a laser ablatable masking layer disposed on the one or more photocurable layers, the laser ablatable masking layer comprising a radiation opaque material; and (d) optionally, a removable coversheet. Upon exposure and development, the resulting relief image printing element does not degrade if left under ambient lights for an extended period of time.
A method of producing a relief image or mold from a liquid photopolymer resin, said method comprising the steps of: a) placing an image film onto an exposure glass; b) placing a cover film over the image film and drawing a vacuum c) placing substrate material on a bottom glass d) casting a liquid photopolymer resin layer onto the substrate material; d) laminating a flexible polyester sheet onto a backside of the liquid photopolymer resin layer as the liquid photopolymer resin layer is being cast onto the substrate material; and e) exposing the liquid photopolymer resin layer through the image film to selectively crosslink and cure the photopolymerizable resin layer and form a cured relief image, wherein said depth of the cured relief image is less than the height of the cast liquid photopolymerizable resin.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
A method of producing a flexographic printing plate using a continuous liquid interphase is provided herein. This method allows for significantly reduced production times and fewer preparation steps compared to standard non-continuous techniques and results in less waste than typical methods for preparing flexographic printing plates. The printing plate provided by using continuous liquid interphase production results in a printing plate with desirable elastomeric elongation, desirable hardness, plate thickness in the range of 0.030 inches to 0.250 inches, and comprises printing dots with desirable characteristics.
B41C 1/10 - Forme preparation for lithographic printingMaster sheets for transferring a lithographic image to the forme
G03B 27/04 - Copying apparatus without a relative movement between the original and the light source during exposure, e.g. printing frame or printing box
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
G03F 7/09 - Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
A method of producing a flexographic printing plate using a continuous liquid interphase is provided herein. This method allows for significantly reduced production times and fewer preparation steps compared to standard non-continuous techniques and results in less waste than typical methods for preparing flexographic printing plates. The printing plate provided by using continuous liquid interphase production results in a printing plate with desirable elastomeric elongation, desirable hardness, plate thickness in the range of 0.030 inches to 0.250 inches, and comprises printing dots with desirable characteristics.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
G03F 7/027 - Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
G03F 7/033 - Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
G03F 7/035 - Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polyurethanes
G03F 7/038 - Macromolecular compounds which are rendered insoluble or differentially wettable
A method of flood exposing a photocurable printing blank to actinic radiation from a UV LED light source, wherein a high intensity UV LED light source is modulated to a lower intensity. The method includes the steps of: (a) positioning the photocurable printing blank in an exposure unit, wherein the exposure unit comprises one or more high intensity UV LED light sources; (b) modulating intensity of the one or more high intensity UV LED light sources to a lower intensity; and (c) flood exposing the photocurable printing blank through the photographic negative or the digitally imaged mask layer to actinic radiation from the one or more modulated UV LED light sources.
G06F 7/20 - Comparing separate sets of record carriers arranged in the same sequence to determine whether at least some of the data in one set is identical with that in the other set or sets
A photocurable relief image printing blank comprising: (a) a support layer; (b) one or more photocurable layers disposed on the support layer, wherein the one or more photocurable layers comprise: i) a binder; ii) one or more monomers; iii) a photoinitiator; iv) an additive selected from the group consisting of phosphites, phosphines, thioether amine compounds, and combinations of one or more of the foregoing; and v) an additional component comprising amine moieties; (c) a laser ablatable masking layer disposed on the one or more photocurable layers, the laser ablatable masking layer comprising a radiation opaque material; and (d) optionally, a removable coversheet. Upon exposure and development, the resulting relief image printing element does not degrade if left under ambient UV lights for an extended period of time.
A photocurable relief image printing blank comprising: (a) a support layer; (b) one or more photocurable layers disposed on the support layer, wherein the one or more photocurable layers comprise: i) a binder; ii) one or more monomers; iii) a photoinitiator; iv) an additive selected from the group consisting of phosphites, phosphines, thioether amine compounds, and combinations of one or more of the foregoing; and v) an additional component comprising amine moieties; (c) a laser ablatable masking layer disposed on the one or more photocurable layers, the laser ablatable masking layer comprising a radiation opaque material; and (d) optionally, a removable coversheet. Upon exposure and development, the resulting relief image printing element does not degrade if left under ambient UV lights for an extended period of time.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
34.
CUSTOMIZABLE PRINTING PLATES AND METHOD OF MAKING THE SAME
A method of creating a custom relief image printing element from at least one raw photocurable material and at least one lamination layer supplied by a manufacturer is described. The manufacturer provides a menu of raw photocurable materials and a menu of lamination layers and wherein the customer selects at least one raw photocurable material from the menu of raw photocurable materials and selects at least one lamination layer from the menu of lamination layers. The method includes the steps of: a) laminating the selected at least one raw photocurable material to the selected at least one lamination layer at a customer's location to create a photocurable printing blank; and thereafter b) imagewise exposing the at least one photocurable printing blank to actinic radiation at the customer's location to crosslink and cure portions of the at least one photocurable material and create a relief image therein. A lamination system is also described.
B41C 3/08 - ElectrotypingApplication of backing layers thereon
B32B 37/24 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
35.
Customizable printing plates and method of making the same
A method of creating a custom relief image printing element from at least one raw photocurable material and at least one lamination layer supplied by a manufacturer is described. The manufacturer provides a menu of raw photocurable materials and a menu of lamination layers and wherein the customer selects at least one raw photocurable material from the menu of raw photocurable materials and selects at least one lamination layer from the menu of lamination layers. The method includes the steps of: a) laminating the selected at least one raw photocurable material to the selected at least one lamination layer at a customer's location to create a photocurable printing blank; and thereafter b) imagewise exposing the at least one photocurable printing blank to actinic radiation at the customer's location to crosslink and cure portions of the at least one photocurable material and create a relief image therein. A lamination system is also described.
An apparatus for thermally processing a relief image printing element and a method of using the same are described. The printing element comprises at least one photopolymer layer and is selectively exposed to actinic radiation to crosslink portions of the at least one photopolymer layer. The apparatus comprises: (a) means for supporting the printing element; (b) heating means for melting or softening non-crosslinked portions of the at least one photopolymer layer; (c) at least one rotatable roll that is capable of bringing a blotting material into contact with the at least one photopolymer layer to remove the melted or softened non-crosslinked portions of the at least one photopolymer layer; and (d) an element arranged adjacent to the at least one rotatable roll for removing non-crosslinked photopolymer remaining on a surface of the at least one rotatable roll after step c). The apparatus may alternatively be operated without a blotting material.
A method of selectively exposing a liquid photopolymer printing blank to actinic radiation to create a relief image printing plate and a liquid platemaking exposure system. The method includes: (1) positioning a programmable screen programmed with an image file of a desired image between the top glass and an upper source of actinic radiation; (2) exposing the layer of liquid photopolymer to actinic radiation from the upper source of actinic radiation through the programmable screen to crosslink and cure at least a portion of the liquid photopolymer adjacent to the backing sheet and create a floor layer therein; and (3) imagewise exposing the layer of liquid photopolymer to actinic radiation from a lower source of actinic radiation through a negative of the relief image to crosslink and cure selective portions of the liquid photopolymer on the floor layer and create the relief image therein.
An apparatus for thermally processing a relief image printing element and a method of using the same. The relief image printing element comprises at least one photopolymer layer, and is selectively exposed to actinic radiation to crosslink portions of the at least one photopolymer layer, while portions of the at least one photopolymer layer are not exposed to actinic radiation, and are not crosslinked. The apparatus comprises: a) a means for supporting the relief image printing element; b) heating means for melting or softening non-crosslinked portions of the at least one photopolymer layer; c) at least one rotatable roll that is capable of bringing a blotting material into contact with the at least one photopolymer layer to remove the melted or softened non-crosslinked portions of the at least one photopolymer layer; and d) a rotatable cleaning roll arranged adjacent to the at least one rotatable roll, for removing non- crosslinked photopolymer remaining on a surface of the at least one rotatable roll after step c).
A method of selectively exposing a liquid photopolymer printing blank to actinic radiation to create a relief image printing plate. The method includes the steps of: (1) positioning a programmable screen between the top glass and an upper source of actinic radiation, wherein the programmable screen is programmed with an image file of a desired image; (2) exposing the layer of liquid photopolymer to actinic radiation from the upper source of actinic radiation through the programmable screen for a period of time to crosslink and cure at least a portion of the liquid photopolymer adjacent to the backing sheet and create a floor layer therein; and (3) imagewise exposing the layer of liquid photopolymer to actinic radiation from a lower source of actinic radiation through a negative of the relief image to crosslink and cure selective portions of the liquid photopolymer on the floor layer and create the relief image therein. A liquid platemaking exposure system is also described.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
G03F 7/12 - Production of screen printing forms or similar printing forms, e.g. stencils
40.
Method and apparatus for producing liquid flexographic printing plates
A method of selectively exposing a liquid photopolymer printing blank to actinic radiation to create a relief image printing plate and a liquid platemaking exposure system. The method includes: (1) positioning a programmable screen programmed with an image file of a desired image between the top glass and an upper source of actinic radiation; (2) exposing the layer of liquid photopolymer to actinic radiation from the upper source of actinic radiation through the programmable screen to crosslink and cure at least a portion of the liquid photopolymer adjacent to the backing sheet and create a floor layer therein; and (3) imagewise exposing the layer of liquid photopolymer to actinic radiation from a lower source of actinic radiation through a negative of the relief image to crosslink and cure selective portions of the liquid photopolymer on the floor layer and create the relief image therein.
G06F 7/20 - Comparing separate sets of record carriers arranged in the same sequence to determine whether at least some of the data in one set is identical with that in the other set or sets
A method of producing a relief image printing element from a photocurable printing blank. The method includes the steps of a) providing a photocurable printing blank, the photocurable printing blank comprising (i) a backing or support layer; and (ii) one or more photocurable layers disposed on the backing or support layer. The one or more photocurable layers are selectively imaged by exposing the layers to actinic radiation to selectively crosslink and cure portions of the one or more photocurable layers, and then developed to remove uncured portions of the one or more photocurable layers and reveal the relief image therein. The relief image comprises a plurality of relief printing dots, including relief printing dots that have a rounded top and relief printing dots that have a flat top.
A carrier sheet for providing support to a photocurable printing blank as the photocurable printing blank is conveyed through a plurality of laminating rollers that laminate an oxygen barrier layer to a top surface of the photocurable printing blank. The carrier sheet includes a heat resistant dimensionally-stable backing layer; and a resilient layer mounted on the heat resistant dimensionally-stable backing layer.
B32B 37/00 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
B32B 5/00 - Layered products characterised by the non-homogeneity or physical structure of a layer
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
B32B 5/18 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by features of a layer containing foamed or specifically porous material
B32B 33/00 - Layered products characterised by particular properties or particular surface features, e.g. particular surface coatingsLayered products designed for particular purposes not covered by another single class
B32B 38/00 - Ancillary operations in connection with laminating processes
43.
METHOD OF CREATING HYBRID PRINTING DOTS IN A FLEXOGRAPHIC PRINTING PLATE
A method of producing a relief image printing element from a photocurable printing blank. The method includes the steps of a) providing a photocurable printing blank, the photocurable printing blank comprising (i) a backing or support layer; and (ii) one or more photocurable layers disposed on the backing or support layer. The one or more photocurable layers comprise a photocurable composition comprising (1) a binder; (2) one or more monomers; (3) a photoinitiator; and (4) an additive. The one or more photocurable layers are selectively imaged by exposing the layers to actinic radiation to selectively crosslink and cure portions of the one or more photocurable layers, and then developed to remove uncured portions of the one or more photocurable layers and reveal the relief image therein. The relief image comprises a plurality of relief printing dots, including relief printing dots that have a rounded top and relief printing dots that have a flat top.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
A earner sheet for providing support to a photocurable printing blank as the photocurable printing blank is conveyed through a plurality of laminating rollers that laminate an oxygen banier layer to a top surface of the photocurable printing blank. The carrier sheet includes a heat resistant dimensionally-stable backing layer; and a resilient layer mounted on the heat resistant dimensionally-stable backing layer.
B32B 37/26 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer which influences the bonding during the laminating process, e.g. release layers or pressure equalising layers
B41F 5/24 - Rotary letterpress machines for flexographic printing
A earner sheet for providing support to a photocurable printing blank as the photocurable printing blank is conveyed through a plurality of laminating rollers that laminate an oxygen banier layer to a top surface of the photocurable printing blank. The carrier sheet includes a heat resistant dimensionally-stable backing layer; and a resilient layer mounted on the heat resistant dimensionally-stable backing layer.
B32B 37/26 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer which influences the bonding during the laminating process, e.g. release layers or pressure equalising layers
G03G 15/00 - Apparatus for electrographic processes using a charge pattern
A method of selectively exposing a liquid photopolymer printing blank to actinic radiation to create a relief image printing plate. The printing blank is produced by (i) placing a photographic negative on a bottom glass platen and placing a coverfilm over the negative, (ii) disposing a layer of liquid photopolymer on top of the coverfilm and negative, and (iii) placing a backing sheet over the liquid photopolymer layer. The method includes the steps of scanning a light bar across an upper surface of the liquid photopolymer printing blank through the backing sheet to cure the layer of liquid photopolymer in selected areas, creating islands of cured polymer adjacent to the backing sheet, and imaging the photopolymer through the bottom of the liquid photopolymer printing blank to crosslink and cure selective portions of the liquid photopolymer and create a relief image therein. The relief image is created on the cured islands.
A method of selectively exposing a liquid photopolymer printing blank to actinic radiation to create a relief image printing plate. The printing blank is produced by (i) placing a photographic negative on a bottom glass platen and placing a coverfilm over the negative, (ii) disposing a layer of liquid photopolymer on top of the coverfilm and negative, and (iii) placing a backing sheet over the liquid photopolymer layer. The method includes the steps of scanning a light bar across an upper surface of the liquid photopolymer printing blank through the backing sheet to cure the layer of liquid photopolymer in selected areas, creating islands of cured polymer adjacent to the backing sheet, and imaging the photopolymer through the bottom of the liquid photopolymer printing blank to crosslink and cure selective portions of the liquid photopolymer and create a relief image therein. The relief image is created on the cured islands.
A photocurable relief image printing element is described. The photocurable relief image printing element comprises (a) a support layer; (b) one or more photocurable layers disposed on the support layer, wherein the one or more photocurable layers comprise: (i) a binder; (ii) one or more monomers; (iii) a photoinitiator; and (iv) an additive selected from the group consisting of phosphites, phosphines, thioether amine compounds, and combinations of one or more of the foregoing; (c) a laser ablatable masking layer disposed on the one or more photocurable layers, the laser ablatable masking layer comprising a radiation opaque material; and (d) optionally, a removable coversheet. The photocurable relief image printing element provides improved surface cure in digital relief image printing elements.
A method of making a relief image printing element comprising a plurality of relief printing dots. The method includes the steps of: (a) providing at least one photocurable layer disposed on the backing layer, the at least one photocurable layer being capable of being selectively crosslinked and cured upon exposure to actinic radiation, (b) imagewise exposing the at least one photocurable layer to actinic radiation to selectively crosslink and cure portions of the at least one photocurable layer; and (c) developing the relief image printing element to separate and remove uncrosslinked and uncured portions of the at least one photocurable layer to reveal the relief image therein. The at least one photocurable layer comprises (i) an ethylenically unsaturated monomer; (ii) a binder; and (iii) a photoinitiator exhibiting a quantum yield of initiation (Qi) of more than 0.05 at a 365 nm wavelength.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
G03F 7/028 - Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with photosensitivity-increasing substances, e.g. photoinitiators
G03F 7/032 - Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders
50.
Flexographic printing plate with improved cure efficiency
A method of making a relief image printing element comprising a plurality of relief printing dots. The method includes the steps of: (a) providing at least one photocurable layer disposed on the backing layer, the at least one photocurable layer being capable of being selectively crosslinked and cured upon exposure to actinic radiation, (b) imagewise exposing the at least one photocurable layer to actinic radiation to selectively crosslink and cure portions of the at least one photocurable layer; and (c) developing the relief image printing element to separate and remove uncrosslinked and uncured portions of the at least one photocurable layer to reveal the relief image therein. The at least one photocurable layer comprises (i) an ethylenically unsaturated monomer; (ii) a binder; and (iii) a photoinitiator exhibiting a quantum yield of initiation (Qi) of more than 0.05 at a 365 nm wavelength.
A method of making a relief image printing element from a photosensitive printing blank is described. The photosensitive printing blank comprises a laser ablatable mask layer disposed on at least one photocurable layer and the laser ablatable mask layer is selectively laser ablated to create an in situ mask and uncover portions of the at least one photocurable layer. The method includes a) pushing the photosensitive printing blank through a nip formed by a textured roller and a backing roller, wherein the textured roller contacts the in situ mask and the uncovered portions of the at least one photocurable layer; and b) exposing the at least one photocurable layer to at least one source of actinic radiation through the in situ mask to selectively cross link and cure the portions of the at least one photocurable layer not covered by the in situ mask. A defined topographical pattern is transferred from the textured surface of the roller to the at least one photocurable layer.
G03F 7/12 - Production of screen printing forms or similar printing forms, e.g. stencils
B05C 1/08 - Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller
B05C 9/12 - Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by groups , or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed after the application
A method is provided for processing a flexographic printing blank to produce a relief image printing element capable of printing cleanly. The method provides a flexographic printing blank comprising: (i) a support layer; (ii) at least one photocurable layer disposed on the support layer, and (iii) a laser ablatable mask layer disposed on the at least one photocurable layer. The laser ablatable mask layer is laser ablated to create an in situ negative in the laser ablatable mask layer. Thereafter, a barrier layer is disposed on the laser ablatable mask layer. The photocurable layer is exposed to actinic radiation through the barrier layer and the laser ablatable mask layer; and the imaged and exposed flexographic printing blank is developed to reveal the relief image therein. The resulting flexographic relief image printing element is capable of printing cleanly and of resisting paper fibers, dust, and ink during a print run.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
G03F 7/38 - Treatment before imagewise removal, e.g. prebaking
53.
Method for creating surface texture on flexographic printing elements
A method of making a relief image printing element from a photosensitive printing blank is described. The photosensitive printing blank comprises a laser ablatable mask layer disposed on at least one photocurable layer and the laser ablatable mask layer is selectively laser ablated to create an in situ mask and uncover portions of the at least one photocurable layer. The method includes a) pushing the photosensitive printing blank through a nip formed by a textured roller and a backing roller, wherein the textured roller contacts the in situ mask and the uncovered portions of the at least one photocurable layer; and b) exposing the at least one photocurable layer to at least one source of actinic radiation through the in situ mask to selectively cross link and cure the portions of the at least one photocurable layer not covered by the in situ mask. A defined topographical pattern is transferred from the textured surface of the roller to the at least one photocurable layer.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
G03F 7/12 - Production of screen printing forms or similar printing forms, e.g. stencils
B05C 1/08 - Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller
B05C 9/12 - Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by groups , or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed after the application
A photosensitive printing blank having is described. The photosensitive printing blank comprises at least one photocurable layer that is capable of being selectively crosslinked and cured upon exposure to actinic radiation at a desired wavelength region comprising (a) at least one elastomeric binder, (b) at least one ethylenically unsaturated monomer, (c) a photoinitiator having a favorable absorption profile in the desired wavelength region used for exposing the at least one photocurable layer to actinic radiation, and (d) a dye, wherein the dye exhibits a suitable percent transmission as measured with a UV spectrophotometer at the desired wavelength region used for exposing the at least one photocurable layer to actinic radiation, and optionally an infrared ablatable layer disposed on the at least one photocurable layer. A method of making a relief image printing element from the photosensitive printing blank is also described.
An apparatus for thermally processing a relief image printing element and a method of using the same are described. The printing element comprises at least one photopolymer layer and is selectively exposed to actinic radiation to crosslink portions of the at least one photopolymer layer. The apparatus comprises: (a) means for supporting the printing element; (b) heating means for melting or softening non-crosslinked portions of the at least one photopolymer layer; (c) at least one rotatable roll that is capable of bringing a blotting material into contact with the at least one photopolymer layer to remove the melted or softened non-crosslinked portions of the at least one photopolymer layer,; and (d) an element arranged adjacent to the at least one rotatable roll for removing non-crosslinked photopolymer remaining on a surface of the at least one rotatable roll after step c). The apparatus may alternatively be operated without a blotting material.
An apparatus for thermally processing a relief image printing element and a method of using the same are described. The printing element comprises at least one photopolymer layer and is selectively exposed to actinic radiation to crosslink portions of the at least one photopolymer layer. The apparatus comprises: (a) means for supporting the printing element; (b) heating means for melting or softening non-crosslinked portions of the at least one photopolymer layer; (c) at least one rotatable roll that is capable of bringing a blotting material into contact with the at least one photopolymer layer to remove the melted or softened non-crosslinked portions of the at least one photopolymer layer; and (d) an element arranged adjacent to the at least one rotatable roll for removing non-crosslinked photopolymer remaining on a surface of the at least one rotatable roll after step c). The apparatus may alternatively be operated without a blotting material.
A method of tailoring the shape of a plurality of relief printing dots created in a photosensitive printing blank during a platemaking process is described. The method includes the steps of: (a) selectively exposing at least one photocurable layer to a source of actinic radiation to selectively crosslink and cure the at least one photocurable layer; and (b) developing the exposed at least one photocurable layer to reveal the relief image therein, said relief image comprising the plurality of relief printing dots. The source of actinic radiation comprises at least one source of UV light in the UV-A range and at least one source of light in the UV-C range and the at least one photocurable layer is simultaneously exposed to the at least one source of UV light in the UV-A range and the at least one source of UV light in the UV-C range. As a result, printing dots are produced having at least one geometric characteristic selected from the group consisting of a desired planarity of a top surface of the relief printing dots, a desired shoulder angle of the relief printing dots and a desired edge sharpness of the relief printing dots.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
58.
Method of improving print performance in flexographic printing plates
A method of tailoring the shape of a plurality of relief printing dots created in a photosensitive printing blank during a platemaking process including the steps of: (a) selectively exposing at least one photocurable layer to a source of actinic radiation to selectively crosslink and cure the at least one photocurable layer; and (b) developing the exposed at least one photocurable layer to reveal the relief image therein, said relief image comprising the plurality of relief printing dots. The source of actinic radiation comprises a source of UV light in the UV-A range and a source of light in the UV-C range. The at least one photocurable layer is simultaneously exposed to the source of UV light in the UV-A range and the source of UV light in the UV-C range to produce printing dots having at least one desired geometric characteristic.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
A photocurable relief image printing element is described. The photocurable relief image printing element comprises (a) a support layer; (b) one or more photocurable layers disposed on the support layer, wherein the one or more photocurable layers comprise: (i) a binder; (ii) one or more monomers; (iii) a photoinitiator; and (iv) an additive selected from the group consisting of phosphites, phosphines, thioether amine compounds, and combinations of one or more of the foregoing; (c) a laser ablatable masking layer disposed on the one or more photocurable layers, the laser ablatable masking layer comprising a radiation opaque material; and (d) optionally, a removable coversheet. The photocurable relief image printing element provides improved surface cure in digital relief image printing elements.
A method of making a relief image printing element from a photosensitive printing blank is provided. The method comprising the steps of: 1) providing a photosensitive printing blank comprising a backing layer, at least one layer of photoresin on top of the backing layer and a removable coversheet on top of the at least one layer of photoresin; 2) imaging the photosensitive printing blank through the removable coversheet using a laser to create a relief image therein; and 3) removing the removable coversheet.
G03F 7/11 - Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
A method of tailoring the shape of a plurality of relief printing dots created in a photosensitive printing blank during a platemaking process is provided. The photocurable layer is exposed to actinic radiation using an array of UV LED light assemblies and the use of the array of UV LED light assemblies produces relief printing dots having at least one geometric characteristic selected from the group consisting of a desired planarity of a top surface of the relief printing dots, a desired shoulder angle of the relief printing dots and a desired edge sharpness of the relief printing dots.
A method of thermally developing a photocurable printing blank to produce a relief image comprising a plurality of relief dots is provided. The photocurable printing blank comprises a backing layer having at least one photocurable layer disposed thereon. The method includes the steps of (1) laminating an oxygen barrier membrane to a top of the photocurable layer; (2) placing a negative of the desired relief image on top of the oxygen barrier membrane; (3) exposing the printing blank to actinic radiation through the oxygen barrier and negative to crosslink and cure portions of the at least one photocurable layer, creating the relief pattern; (4) removing the oxygen barrier membrane and negative from the top of the at least one photocurable layer; and (5) developing the printing blank to reveal the relief image. The presence of the oxygen barrier membrane produces dots having desired characteristics. The negative itself can be used as the oxygen barrier layer.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
G03F 7/34 - Imagewise removal by selective transfer, e.g. peeling away
A method of controlling surface roughness of a flexographic printing element during thermal processing is provided. An imaged and exposed relief image printing element is thermally developed to remove the portions of at least one layer of photopolymer that are not crosslinked and cured by using a blotting material. The blotting material is separated from the at least one layer of photopolymer. Thereafter, a smooth material is inserted between the surface of the at least one layer of photopolymer and the blotting material, applying pressure and heat. In the alternative, after the relief image printing element is removed from the thermal processor, a polymeric film is laminated onto the relief image printing element using heat and pressure. The surface roughness of the relief image printing element is reduced, allowing for increased solid ink density on solid areas printed using the relief image printing element.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
G03F 7/36 - Imagewise removal not covered by groups , e.g. using gas streams, using plasma
G03F 7/40 - Treatment after imagewise removal, e.g. baking
64.
METHOD OF IMPROVING PRINT PERFORMANCE IN FLEXOGRAPHIC PRINTING PLATES
A method of tailoring the shape of a plurality of relief printing dots created in a photosensitive printing blank during a platemaking process is provided. The photocurable layer is exposed to actinic radiation using an array of UV LED light assemblies and the use of the array of UV LED light assemblies produces relief printing dots having at least one geometric characteristic selected from the group consisting of a desired planarity of a top surface of the relief printing dots, a desired shoulder angle of the relief printing dots and a desired edge sharpness of the relief printing dots.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
A photocurable relief image printing element is described. The photocurable relief image printing element comprises (a) a support layer; (b) one or more photocurable layers disposed on the support layer, wherein the one or more photocurable layers comprise: (i) a binder; (ii) one or more monomers; (iii) a photoinitiator; and (iv) an additive selected from the group consisting of phosphites, phosphines, thioether amine compounds, and combinations of one or more of the foregoing; (c) a laser ablatable masking layer disposed on the one or more photocurable layers, the laser ablatable masking layer comprising a radiation opaque material; and (d) optionally, a removable coversheet. The photocurable relief image printing element provides improved surface cure in digital relief image printing elements.
B41C 1/05 - Heat-generating engraving heads, e.g. laser beam, electron beam
B41F 5/24 - Rotary letterpress machines for flexographic printing
B41N 1/12 - Printing plates or foilsMaterials therefor non-metallic other than stone
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
G03F 7/09 - Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
66.
Method of improving surface cure in digital flexographic printing plates
A photocurable relief image printing element is described. The photocurable relief image printing element comprises (a) a support layer; (b) one or more photocurable layers disposed on the support layer, wherein the one or more photocurable layers comprise: (i) a binder; (ii) one or more monomers; (iii) a photoinitiator; and (iv) an additive selected from the group consisting of phosphites, phosphines, thioether amine compounds, and combinations of one or more of the foregoing; (c) a laser ablatable masking layer disposed on the one or more photocurable layers, the laser ablatable masking layer comprising a radiation opaque material; and (d) optionally, a removable coversheet. The photocurable relief image printing element provides improved surface cure in digital relief image printing elements.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
A method of tailoring the shape of a plurality of relief printing dots created in a photosensitive printing blank during a platemaking process is provided. The photocurable layer is exposed to actinic radiation using an array of UV LED light assemblies and the use of the array of UV LED light assemblies produces relief printing dots having at least one geometric characteristic selected from the group consisting of a desired planarity of a top surface of the relief printing dots, a desired shoulder angle of the relief printing dots and a desired edge sharpness of the relief printing dots.
A method of developing a photocurable printing blank to produce a relief pattern comprising a plurality of relief dots having desired characteristics. The photocurable printing blank comprises a backing layer having at least one photocurable layer disposed thereon and a barrier layer disposed on the at least one photocurable layer. The method includes the steps of (1) placing a negative of a desired relief image on top of the barrier layer; (2) exposing the printing blank to actinic radiation through the barrier layer and negative to selectively crosslink and cure portions of the at least one photocurable layer, wherein the at least one photocurable layer is crosslinked and cured in the portions not covered by the negative, thereby creating the relief pattern; and (3) developing the printing blank to remove the barrier layer and uncured portions of the photocurable layer and reveal the relief pattern.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
A method of making a relief printing element in a liquid photopolymer platemaking process is described. The method comprises the steps of: (a) selectively exposing the liquid photopolymer to actinic radiation through a negative to crosslink and cure portions of the liquid photopolymer; and (b) reclaiming uncured portions of the liquid photopolymer to be reused in the platemaking process. The step of reclaiming uncured portions of the liquid photopolymer comprises (i) heating the printing element to decrease the viscosity of the uncured liquid photopolymer; and (ii) removing uncured liquid photopolymer from the surface of the relief image printing element so that recovery of uncured liquid photopolymer from the surface of the relief image printing element is enhanced.
B41M 5/00 - Duplicating or marking methodsSheet materials for use therein
B41N 1/00 - Printing plates or foilsMaterials therefor
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
A clean running flexographic relief image printing element and a method of making the same is described. The relief image printing element comprises (a) a backing layer; (b) a floor layer disposed on the backing layer and comprising a photopolymer containing a silicone monomer or silicone oil, wherein the cured floor layer has a surface energy of between about 18 to about 25 dynes/cm; (c) a cap layer disposed on the floor layer and comprising a photocurable composition that is capable of being imagewise exposed to actinic radiation to create a relief image therein, wherein the cap layer has a surface energy of between about 30 and about 40 dynes/cm; and (d) a removable cover sheet. The differential of surface energies between the floor layer and the cap layer increases how clean the plate will print over time.
G03F 7/095 - Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having more than one photosensitive layer
G03F 7/11 - Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
A combined laminating and exposing apparatus for exposing a photosensitive printing blank to actinic radiation in a printing plate manufacturing system and a method of using the same are disclosed. The photosensitive printing blank comprises a backing layer, at least one photocurable layer disposed on the backing layer, and a laser ablatable mask layer disposed on the at least one photocurable layer, wherein the laser ablatable mask layer is laser ablated to create an in situ negative in the laser ablatable mask layer. The exposing apparatus comprises: (a) a laminating apparatus for laminating an oxygen barrier layer to a top of the laser ablated mask layer; (b) a conveyor; (c) a first exposing device for imagewise exposing the at least one photocurable layer to actinic radiation, and (d) a second exposing device for exposing the at least one photocurable layer to actinic radiation through the backing layer.
An apparatus for laminating a film to a substrate and a method of using the same is described. The apparatus comprises a) a heated laminating roller and a second roller, wherein said heated laminating roller and said second roller are opposably mounted and form a nip; b) a drive mechanism for rotating the heated laminating roller and second roller; c) a film supply roller adapted to support a roll of film and supply the film over an outer surface of the heated laminating roller and into the nip, wherein the film is contactable with a top surface of the substrate at a point where the substrate advances through the nip; and d) a splitter bar in contact with the film supplied from the supply roller, wherein the position of the splitter bar controls a wrap angle between the film and the heated laminating roller.
B32B 37/02 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
B32B 37/06 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
01 - Chemical and biological materials for industrial, scientific and agricultural use
Goods & Services
(1) Industrial chemicals for use in plating, cleaning and etching metal and plastic surfaces; chemicals for use in the manufacture of commercial and industrial printing plates, namely polymer compositions.
01 - Chemical and biological materials for industrial, scientific and agricultural use
Goods & Services
Industrial chemicals for use in plating, cleaning and etching metal and plastic surfaces; photopolymers and polymeric materials used in the manufacture of printing plates.
A method of tailoring the shape of a plurality of relief dots created in a photosensitive printing blank during a digital platemaking process is provided. The photosensitive printing blank comprises a laser ablatable mask layer disposed on at least one photocurable layer which is mountable on a printing sleeve. The method comprises the steps of (1) laser ablating the laser ablatable mask layer to create an in situ negative in the laser ablatable layer; (2) placing a barrier layer on top of the laser ablatable mask layer; (3) exposing the at least one photocurable layer to actinic radiation through the barrier layer and the in situ negative; (4) removing the barrier layer; and (5) developing the imaged and exposed photosensitive printing blank to reveal the relief image therein, the relief image comprising the plurality of relief dots. The presence of the barrier layer produces printing dots having desired geometric characteristics.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
A method of making a relief image printing element having a relief pattern, the method comprising the steps of: a) selectively ablating the masking layer to create an overall image in the masking layer, such that the overall image comprises a sub-image, comprising a pattern of cells, in it; b) applying an oxygen barrier layer on top of the masking layer; c) exposing the printing element to actinic radiation through the oxygen barrier layer and the masking layer to selectively crosslink: and cure the at least one photocurable layer, thereby creating the relief image therein and a textured surface on the printing element; and d) developing the printing blank by removing the barrier layer and the uncured portions of the photocmable layer to reveal the relief image.
A method of controlling surface roughness of the relief surface of a flexographic printing element during thermal processing is provided. An imaged and exposed relief image printing element is thermally developed to remove the portions of at least one layer of photopolymer that are not crosslinked and cured by a) heating the at least one layer of photopolymer to soften uncured portions of the at least one layer of photopolymer; b) causing contact between the at least one layer of photopolymer and a blotting material; and c) separating the blotting material from the at least one layer of photopolymer. Thereafter, a smooth material is inserted between the surface of the at least one layer of photopolymer and the blotting material. In the alternative, a polymeric film is laminated onto the relief image printing element using heat and pressure.
B41N 1/00 - Printing plates or foilsMaterials therefor
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
A method of making a relief image printing element having a relief pattern comprising a plurality of relief dots, wherein the photocurable printing blank comprises a backing layer having at least one photocurable layer disposed thereon and a masking layer on the at least one photocurable layer is provided. The method comprising the steps of: a) selectively ablating the masking layer to create an overall image in the masking layer, such that the overall image comprises a sub-image, comprising a pattern of cells, in it; b) applying an oxygen barrier layer on top of the masking layer; c) exposing the printing element to actinic radiation through the oxygen barrier layer and the masking layer; and d) developing the printing blank by removing the barrier layer and the uncured portions of the photocurable layer to reveal the relief image.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
A method of preparing a photosensitive printing blank, the method comprising the steps of: a) coating a slip film onto a coversheet and drying the slip film; and depositing at least one layer of photosensitive material on top of the slip film coated coversheet and laminating a substrate layer to the exposed surface of the photosensitive material. The slip film comprises: i) a polymer selected from the group consisting of polystyrene and polyvinylpyrrolidone; ii) optionally, an additive. The slip film at least substantially eliminates the formation of hot spots during an analog plate making process.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
A photocurable printing blank comprises a backing layer having a photocurable layer disposed thereon, a barrier layer disposed on the photocurable layer, and a laser ablatable mask layer disposed on top of the barrier layer. The method includes the steps of (1 ) imaging the at least one photo curable layer by ablating the laser ablatable mask layer to create the relief pattern on the photocurable printing blank; (2) exposing the printing blank to actinic radiation through the barrier layer and mask layer to selectively crosslink portions of the photocurable layer, thereby creating the relief pattern; (3) developing the printing blank to remove the barrier layer, the laser ablated mask layer and uncured portions of the photo curable layer and reveal the relief pattern. The method can also be used with an analog platemaking process that uses a negative instead of an ablatable mask layer.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
G03F 7/14 - Production of collotype printing forms
G03F 7/36 - Imagewise removal not covered by groups , e.g. using gas streams, using plasma
83.
Photosensitive resin laminate and thermal processing of the same
A method of developing a photocurable printing blank to produce a relief pattern comprising a plurality of relief dots. The photocurable printing blank comprises a backing layer having at least one photocurable layer disposed thereon, a barrier layer disposed on the at least one photocurable layer, and a laser ablatable mask layer disposed on top of the barrier layer. The method includes the steps of (1) imaging the at least one photocurable layer by ablating the laser ablatable mask layer to create the relief pattern on the photocurable printing blank the printing blank to actinic radiation through the barrier layer and mask layer to one or more sources of actinic radiation to selectively crosslink and cure portions of the at least one photocurable layer, wherein the at least one photocurable layer is crosslinked and cured in the portions not covered by the mask layer, thereby creating the relief pattern; (3) developing the printing blank to remove the barrier layer, the laser ablated mask layer and uncured portions of the photocurable layer and reveal the relief pattern. The presence of the barrier layer produces printing dots having desired characteristics. The method can also be used with an analog platemaking process that uses a negative instead of an ablatable mask layer.
G03F 7/11 - Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
Thermally developing a photocurable printing blank to produce a relief pattern comprising a plurality of relief dots. The photocurable printing blank comprises a backing layer having at least one photocurable layer disposed thereon and a laser ablatable mask layer disposed on top of the at least one photocurable layer. The method includes: (1 ) imaging a photo curable layer by ablating the mask layer to create the relief pattern; (2) laminating an oxygen barrier membrane atop the ablated mask layer; (3) exposing the printing blank to actinic radiation through the oxygen barrier membrane and ablated mask layer to selectively crosslink and cure portions of the photocurable layer, thereby creating the relief pattern; (4) removing the oxygen barrier membrane from atop the ablated mask layer; and (5) thermally developing the printing blank to remove the ablated mask layer and uncured portions of the photo curable layer and reveal the relief pattern.
A method of thermally developing photocurable printing blank to produce a relief pattern comprising a plurality of relief dots. The photocurable printing blank comprises a backing layer having at least one photocurable layer disposed thereon and a laser ablatable mask layer disposed on top of the at least one photocurable layer. The method includes the steps of (1) imaging the at least one photocurable layer by ablating portions of the laser ablatable mask layer; (2) laminating an oxygen barrier membrane to a top of the laser ablated mask layer; (3) exposing the printing blank to actinic radiation through the oxygen barrier membrane and mask layer to actinic radiation, thereby creating the relief pattern; (4) removing the oxygen barrier membrane; and (5) thermally developing the printing blank to remove the laser ablated mask layer and uncured portions of the photocurable layer and reveal the relief pattern. The presence of the oxygen harrier membrane produces printing dots having desired characteristics.
B41N 1/00 - Printing plates or foilsMaterials therefor
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
A method of thermally developing a photocurable printing blank to produce a relief pattern comprising a plurality of relief dots. The photocurable printing blank comprises a backing layer having at least one photocurable layer disposed thereon and a laser ablatable mask layer disposed on top of the at least one photocurable layer. The method includes the steps of (1) imaging the at least one photocurable layer by ablating the laser ablatable mask layer to create the relief pattern on the surface of the at least one photocurable layer; (2) laminating an oxygen barrier membrane to a top of the laser ablated mask layer; (3) exposing the printing blank to actinic radiation through the oxygen barrier membrane and mask layer to one or more sources of actinic radiation to selectively crosslink and cure portions of the at least one photocurable layer, wherein the at least one photocurable layer is crosslinked and cured in the portions not covered by the mask layer, thereby creating the relief pattern; (4) removing the oxygen barrier membrane from the top of the laser ablated mask layer; and (5) thermally developing the printing blank to remove the laser ablated mask layer and uncured portions of the photocurable layer and reveal the relief pattern. The presence of the oxygen barrier membrane produces printing dots having desired characteristics. The method can also be used with an analog platemaking process that uses a negative instead of an ablatable mask layer, or, in the alternative, the negative itself can be used as the oxygen barrier layer.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
87.
METHOD OF IMPROVING PRINT PERFORMANCE IN FLEXOGRAPHIC PRINTING PLATES
A method of controlling the shape of a plurality of relief dots created in a photosensitive printing blank during a digital platemaking process is provided. The photosensitive printing blank comprises a laser ablatable mask layer disposed on at least one photocurable layer. The method comprises the steps of: a) laser ablating the laser ablatable mask layer to create an in situ negative in the laser ablatable mask layer; b) applying a barrier membrane to the photosensitive printing blank; c) exposing the at least one photocurable layer to actinic radiation through the in situ negative; and d) developing the imaged and exposed photosensitive printing blank to reveal the relief image therein, said relief image comprising the plurality of relief dots. The presence of the barrier membrane produces printing dots having planarity of a top surface, a desired shoulder angle, or a desired edge sharpness.
A method of controlling the shape of a plurality of relief dots created in a photosensitive printing blank during a digital platemaking process is provided. The photosensitive printing blank comprises a laser ablatable mask layer disposed on at least one photocurable layer. The method comprises the steps of: a) laser ablating the laser ablatable mask layer to create an in situ negative in the laser ablatable mask layer; b) applying a barrier membrane to the photosensitive printing blank; c) exposing the at least one photocurable layer to actinic radiation through the in situ negative; and d) developing the imaged and exposed photosensitive printing blank to reveal the relief image therein, said relief image comprising the plurality of relief dots.
G03F 7/11 - Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
A method of making a relief image printing element from a photosensitive printing blank is provided. A photosensitive printing blank with a laser ablatable layer disposed on at least one photocurable layer is ablated with a laser to create an in situ mask. The printing blank is then exposed to at least one source of actinic radiation through the in situ mask to selectively cross link and cure portions of the photocurable layer. Diffusion of air into the at least one photocurable layer is limited during the exposing step and preferably at least one of the type, power and incident angle of illumination of the at least one source of actinic radiation is altered during the exposure step. The resulting relief image comprises a plurality of dots and a dot shape of the plurality of dots is produced that is highly resistant to print fluting for printing on corrugated board.
A method of making a relief image printing element from a photosensitive printing blank is provided. The method comprising the steps of: 1) providing a photosensitive printing blank comprising a backing layer, at least one layer of photoresin on top of the backing layer and a removable coversheet on top of the at least one layer of photoresin; 2) imaging the photosensitive printing blank through the removable coversheet using a laser to create a relief image therein; and 3) removing the removable coversheet.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
A method of producing a relief image from a liquid photopolymerizable resin, said method comprising the steps of: a) placing a coverfilm onto an exposure glass; b) casting a liquid photopolymerizable resin layer onto the coverfilm; c) laminating a substrate to a backside of the liquid photopolymerizable resin layer as the liquid photopolymerizable resin layer is being cast onto the coverfilm; d) placing an image or film negative on top of the substrate; and e) exposing the liquid photopolymerizable resin layer through the image or film negative from the backside of the liquid photopolymerizable resin layer to selectively crosslink and cure the photopolymerizable resin layer and form a cured relief image, wherein said depth of the cured relief image is less than the height of the cast liquid photopolymerizable resin.
A method of making a relief image printing element from a photosensitive printing blank is provided. A photosensitive printing blank with a laser ablatable layer disposed on at least one photocurable layer is ablated with a laser to create an in situ mask. The printing blank is then exposed to at least one source of actinic radiation through the in situ mask to selectively cross link and cure portions of the photocurable layer. Diffusion of air into the at least one photocurable layer is limited during the exposing step and preferably at least one of the type, power and incident angle of illumination of the at least one source of actinic radiation is altered during the exposure step. The resulting relief image comprises a plurality of dots and a dot shape of the plurality of dots that provide optimal print performance on various substrates, including corrugated board.
An improved apparatus for thermally developing a flexographic printing element to reveal a relief image on the surface and a method of using the apparatus to develop a flexographic printing element. The apparatus typically comprises means for softening or melting a crosslinked photopolymer on the imaged and exposed surface of the flexographic printing element; at least one roll that is contactable with the imaged surface of the flexographic printing element and capable of moving over at least a portion of the imaged surface of the flexographic printing element to remove the softened or melted non-crosslinked photopolymer on the imaged and exposed surface of the flexographic printing element; and means for maintaining contact between the at least one roll and the imaged and exposed surface of the flexographic printing element. A layer of resilient compressible material is positioned between the flexographic printing element and a supporting conveying means. The means for softening or melting non-crosslinked photopolymer on the imaged and exposed surface of the flexographic printing element comprise a heater positioned adjacent to the imaged surface of the flexographic printing element and/or heating the at least one roll that contactable with the imaged surface of the flexographic printing element. The apparatus may also contain an exposure device to crosslink and cure the imaged surface of the flexographic printing element prior to thermal development.
A method of making a relief image printing element from a photosensitive printing blank is provided. A photosensitive printing blank with a laser ablatable layer disposed on at least one photocurable layer is ablated with a laser to create an in situ mask. The printing blank is then exposed to at least one source of actinic radiation through the in situ mask to selectively cross link and cure portions of the photocurable layer. Diffusion of air into the at least one photocurable layer is limited during the exposing step and preferably at least one of the type, power and incident angle of illumination of the at least one source of actinic radiation is altered during the exposure step. The resulting relief image comprises a plurality of dots and a dot shape of the plurality of dots that provide optimal print performance on various substrates, including corrugated board.
A method of making a relief image printing element from a photosensitive printing blank is provided. A photosensitive printing blank with a laser ablatable layer disposed on at least one photocurable layer is ablated with a laser to create an In situ mask. The printing blank is then exposed to at least one source of actinic radiation through the in situ mask to selectively cross link and cure portions of the photocurable layer. Diffusion of air into the at least one photocurable layer Is limited during the exposing step and preferably at least one of the type, power and incident angle of illumination of the at least one source of actinic radiation is altered during the exposure step. The resulting relief image comprises a plurality of dots and a dot shape of the plurality of dots is produced that is highly resistant to print fluting for printing on corrugated board.
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
96.
Method of improving print performance in flexographic printing plates
A method of making a relief image printing element from a photosensitive printing blank is provided. A photosensitive printing blank with a laser ablatable layer disposed on at least one photocurable layer is ablated with a laser to create an in situ mask. The printing blank is then exposed to at least one source of actinic radiation through the in situ mask to selectively cross link and cure portions of the photocurable layer. Diffusion of air into the at least one photocurable layer is limited during the exposing step and preferably at least one of the type, power and incident angle of illumination of the at least one source of actinic radiation is altered during the exposure step. The resulting relief image comprises a plurality of dots and a dot shape of the plurality of dots is produced that is highly resistant to print fluting for printing on corrugated board.
G03F 7/11 - Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
01 - Chemical and biological materials for industrial, scientific and agricultural use
40 - Treatment of materials; recycling, air and water treatment,
Goods & Services
Photopolymers and polymeric materials used in the manufacture of printing plates. Services and processes for the treatment of photopolymers and polymeric materials in the manufacture of printing plates.
98.
Means for attaching a printing plate to a printing cylinder
A means for removably attaching a printing plate to a printing cylinder using an intermediate sheet of photopolymer. The tack of the photopolymer is used to attach itself to the printing cylinder and to attach the printing plate to it. Microspheres are incorporated into the photopolymer sheet to provide a cushioning effect when in use on the printing press.
01 - Chemical and biological materials for industrial, scientific and agricultural use
40 - Treatment of materials; recycling, air and water treatment,
Goods & Services
Photopolymers and polymeric materials used in the manufacture of printing plates Services and processes for the treatment of photopolymers and polymeric materials in the manufacture of printing plates
100.
Method and apparatus for thermal processing of photosensitive printing elements
The present invention pertains to a process and an apparatus for treating a photosensitive element to form a relief structure suitable for flexographic printing plate. The apparatus comprises an enclosure, a conveyor, a heatable roller with absorbent material conducted over it, and a roller that can significantly smooth or uniformly roughen the relief structure of the flexographic printing plate. Previously selectively cured photosensitive elements are developed by means of the heatable roller by blotting with the absorbent material, and the resulting relief structure is made uniform by way of a smoothing or roughening roller. The flexographic plates produced by the method and apparatus are especially suited to processes that require substantially smoothed or uniformly roughened printing plate surfaces, which are capable of producing better quality printing.
B41N 6/00 - Mounting boardsMake-ready devices, e.g. underlays, overlaysAttaching by chemical means, e.g. vulcanising
G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
