The invention relates to a process for preforming a composite material (I) in the form of a plate comprising reinforcing fibers bonded together, in particular by a plastic polymer material. In particular, such a process comprises an intermediate forming phase (b) comprising at least the following operations:
introducing gas (III) into the second chamber (4), while maintaining the pressure P2 of the second chamber (4) below the external pressure Pext, and in particular atmospheric pressure, when the external pressure Pext is equal to atmospheric pressure, and thereby locally maintaining the upper diaphragm (2) at a distance from the lower diaphragm (1), and while maintaining, at the contact zone (5), both the alignment and the contact between the composite material (I) and the two diaphragms (1 and 2),
evacuating gas (III) contained in the first chamber (3), so as to press the lower diaphragm (1) over the entire forming surface (22) present at the bottom (21) of the mold (20).
The invention relates to a process for preforming a composite material (I) in the form of a plate comprising reinforcing fibers bonded together, in particular by a plastic polymer material. In particular, such a process comprises an intermediate forming phase (b) comprising at least the following operations:
introducing gas (III) into the second chamber (4), while maintaining the pressure P2 of the second chamber (4) below the external pressure Pext, and in particular atmospheric pressure, when the external pressure Pext is equal to atmospheric pressure, and thereby locally maintaining the upper diaphragm (2) at a distance from the lower diaphragm (1), and while maintaining, at the contact zone (5), both the alignment and the contact between the composite material (I) and the two diaphragms (1 and 2),
evacuating gas (III) contained in the first chamber (3), so as to press the lower diaphragm (1) over the entire forming surface (22) present at the bottom (21) of the mold (20).
The invention also relates to a device adapted to the implementation of such a process.
B29C 70/44 - Shaping or impregnating by compression for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
B29C 70/54 - Component parts, details or accessoriesAuxiliary operations
2.
REINFORCING MATERIAL COMPRISING A POROUS LAYER MADE OF A REACTIVE THERMOPLASTIC POLYMER AND ASSOCIATED METHODS
The present invention relates to a reinforcing material which comprises at least one fibrous reinforcement and is associated with a thermoplastic porous layer on at least one of its faces, said one or more thermoplastic porous layers representing at most 10% of the total mass of the reinforcing material, preferably from 0.5 to 10% of the total mass of the reinforcing material, and preferably from 2 to 6% of the total mass of the reinforcing material, characterised in that said thermoplastic porous layer or each of said present thermoplastic porous layers comprises a so-called reactive thermoplastic polymer or consists of one or more reactive thermoplastic polymers, a reactive thermoplastic polymer having –NH2 functional groups in an amount greater than 0.15 meq/g of reactive thermoplastic polymer and/or having –COOH functional groups in an amount greater than 0.20 meq/g of reactive thermoplastic polymer. The invention also relates to the methods for manufacturing such reinforcing materials, to the preforms, to methods for manufacturing composite parts and to composite parts using such reinforcing materials.
B29C 70/02 - Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising combinations of reinforcements and fillers incorporated in matrix material, forming one or more layers, with or without non-reinforced or non-filled layers
B29C 37/00 - Component parts, details, accessories or auxiliary operations, not covered by group or
B29C 70/08 - Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, with or without non-reinforced layers
B29C 70/20 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in a single direction, e.g. roving or other parallel fibres
B29C 70/22 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B32B 5/12 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments characterised by the relative arrangement of fibres or filaments of adjacent layers
B32B 5/16 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by features of a layer formed of particles, e.g. chips, chopped fibres, powder
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 5/22 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
B32B 7/10 - Interconnection of layers at least one layer having inter-reactive properties
B29C 65/00 - Joining of preformed partsApparatus therefor
B29C 70/44 - Shaping or impregnating by compression for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
B29C 70/50 - Shaping or impregnating by compression for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
B29C 70/54 - Component parts, details or accessoriesAuxiliary operations
B29C 70/56 - Tensioning reinforcements before or during shaping
B29C 70/82 - Forcing wires, nets or the like partially or completely into the surface of an article, e.g. by cutting and pressing
B29C 70/48 - Shaping or impregnating by compression for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM]
3.
NEW REINFORCING MATERIALS BASED ON S- AND Z-TWISTED YARNS FOR THE MANUFACTURE OF COMPOSITE PARTS, METHODS AND USE
The reinforcing material comprises a unidirectional reinforcing ply (2) formed of one or more carbon yarns (3) and associated on one at least of its faces, preferably on each of its faces, with a porous polymeric layer (4, 5), where the polymeric part of the reinforcing material represents from 0.5% to 10% of its total mass and preferably from 2% to 6% of its total mass, characterized in that said carbon yarns (3) are individually twisted with a twist of 3 to 15 turns/m, preferably from 6 to 12 turns/m, and comprise at least one S-twist yarn and at least one Z-twist yarn, according to a selection in accordance with claim 1.
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B32B 5/12 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments characterised by the relative arrangement of fibres or filaments of adjacent layers
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
B32B 7/12 - Interconnection of layers using interposed adhesives or interposed materials with bonding properties
B32B 27/12 - Layered products essentially comprising synthetic resin next to a fibrous or filamentary layer
B32B 27/28 - Layered products essentially comprising synthetic resin comprising copolymers of synthetic resins not wholly covered by any one of the following subgroups
The invention relates to a method for preforming a composite material (I) having the shape of a plate comprising reinforcing fibres that are bonded together, in particular by a plastic polymer material. In particular, such a method comprises an intermediate moulding phase (b) comprising at least the following operations: - introducing the gas (III) into the second chamber (4), while maintaining the pressure P2 of the second chamber (4) below the external pressure Pext, and in particular the atmospheric pressure, when the external pressure Pext is equal to atmospheric pressure, and, thus keeping the upper membrane (2) locally at a distance from the lower membrane (1), and while keeping, in the contact zone (5), both the positioning and the contact between the composite material (I) and the two membranes (1 and 2), - sucking the gas (III) contained in the first chamber (3), so as to press the lower membrane (1) over the entire moulding surface (22) present at the bottom (21) of the mould (20). The invention also relates to a device suitable for implementing such a method.
B29C 70/44 - Shaping or impregnating by compression for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
B29C 43/12 - Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies using bags surrounding the moulding material
B29C 51/10 - Forming by pressure difference, e.g. vacuum
B29B 11/16 - Making preforms characterised by structure or composition comprising fillers or reinforcements
B29C 43/36 - Moulds for making articles of definite length, i.e. discrete articles
B29C 53/04 - Bending or folding of plates or sheets
B29C 70/54 - Component parts, details or accessoriesAuxiliary operations
5.
INTERMEDIATE COMPOSITE ELEMENT, PRODUCTION PROCESS AND COMPOSITE PART
The invention relates to an intermediate composite element (200) comprising: - at least one molded portion (300) comprising an assembly of reinforcing fibers integrated into a thermoset polymer matrix, - at least one dry stack (400) of layers of reinforcing fibers, comprising at least one polymeric porous layer inserted between two successive layers of reinforcing fibers, the molded portion (300) being affixed to the surface of the stack and bonded to the latter, characterized in that the thermoset polymer penetrates into a portion of the thickness of the dry stack (400) from the surface of the dry stack (400) on which the molded portion (300) is affixed, thereby providing the bond between the dry stack (400) and the molded portion (300). The invention also relates to a process for the production thereof, the processes for producing composite parts using such an element and the resulting composite parts.
B29C 70/46 - Shaping or impregnating by compression for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
B29B 11/16 - Making preforms characterised by structure or composition comprising fillers or reinforcements
B29C 70/48 - Shaping or impregnating by compression for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM]
B29C 70/44 - Shaping or impregnating by compression for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
B29C 70/86 - Incorporating in coherent impregnated reinforcing layers
B29D 99/00 - Subject matter not provided for in other groups of this subclass
B29C 37/00 - Component parts, details, accessories or auxiliary operations, not covered by group or
B29C 70/08 - Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, with or without non-reinforced layers
B29C 70/78 - Moulding material on one side only of the preformed part
6.
REINFORCING MATERIAL WITH TWISTED CARBON YARNS FOR FORMING COMPOSITE PARTS, METHODS AND USE THEREOF
The invention relates to a reinforcing material (1) made of a unidirectional reinforcing layer (2) formed of one or more carbon reinforcing threads (3), combined with a layer of polymeric fibres (4, 5), on each of its faces, chosen from non-woven webs, the polymeric portion of the reinforcing material representing between 0.5 and 10% of the total weight of the reinforcing material (1), and preferably between 2 and 6% of its total weight, the unidirectional reinforcing layer (2) comprising one or more reinforcing threads (3) twisted individually according to a twist of 3 to 15 rpm, preferably 6 to 12 rpm.
B29B 11/16 - Making preforms characterised by structure or composition comprising fillers or reinforcements
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
The invention relates to a reinforcing material (1) made of a unidirectional reinforcing layer (2) formed of one or more carbon reinforcing threads (3), combined with a layer of polymeric fibres (4, 5), on each of its faces, chosen from non-woven webs, the polymeric portion of the reinforcing material representing between 0.5 and 10% of the total weight of the reinforcing material (1), and preferably between 2 and 6% of its total weight, the unidirectional reinforcing layer (2) comprising one or more reinforcing threads (3) twisted individually according to a twist of 3 to 15 rpm, preferably 6 to 12 rpm.
B29B 11/16 - Making preforms characterised by structure or composition comprising fillers or reinforcements
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
The present invention relates to a reinforcement material comprising at least one fibrous reinforcement associated, on at least one of its faces, with a porous layer, the one or more porous layers representing at most 10% of the total mass of the reinforcement material, preferably from 0.5 to 10% of the total mass of the reinforcement material, and preferably from 2 to 6% of the total mass of the reinforcement material, characterised in that the porous layer contains a partially cross-linked thermoplastic polymer. The invention also relates to a precursor material of such a reinforcement material, as well as the preparation method thereof and the methods for manufacturing a preform or a composite part from such materials.
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B32B 5/06 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments characterised by a fibrous layer needled to another layer, e.g. of fibres, of paper
B32B 5/12 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments characterised by the relative arrangement of fibres or filaments of adjacent layers
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
B32B 7/08 - Interconnection of layers by mechanical means
B32B 27/12 - Layered products essentially comprising synthetic resin next to a fibrous or filamentary layer
B32B 1/00 - Layered products having a non-planar shape
9.
Method of applying an intermediate material making it possible to ensure the cohesion thereof, method of forming a stack intended for the manufacture of composite components and intermediate material
The present invention relates to a method for applying spot transverse forces to an intermediate material composed of a layer of unidirectional reinforcing fibers associated on at least one of its faces to a layer of thermoplastic and/or thermosetting material that does not represent more than 10% of the total weight of the intermediate material, wherein the spot transverse forces are applied while the intermediate material is under tension in the direction of the unidirectional reinforcing fibers.
B29C 70/38 - Automated lay-up, e.g. using robots, laying filaments according to predetermined patterns
B29C 70/54 - Component parts, details or accessoriesAuxiliary operations
B29C 70/56 - Tensioning reinforcements before or during shaping
B32B 7/08 - Interconnection of layers by mechanical means
B29C 70/08 - Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, with or without non-reinforced layers
B32B 3/26 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layerLayered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a layer with cavities or internal voids
B32B 3/30 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layerLayered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a layer with cavities or internal voids characterised by a layer formed with recesses or projections, e.g. grooved, ribbed
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
B29C 70/44 - Shaping or impregnating by compression for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
B29C 70/20 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in a single direction, e.g. roving or other parallel fibres
B29K 105/08 - Condition, form or state of moulded material containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
B32B 3/02 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
B32B 37/06 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B32B 5/12 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments characterised by the relative arrangement of fibres or filaments of adjacent layers
B29C 70/50 - Shaping or impregnating by compression for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
B29C 70/54 - Component parts, details or accessoriesAuxiliary operations
B29C 70/20 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in a single direction, e.g. roving or other parallel fibres
B29K 105/08 - Condition, form or state of moulded material containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES (France)
Inventor
Bardy, Julien
Beraud, Jean-Marc
Merchat, Léo
Schroder, Maxime
Viard, Andréa
Vincent, Rémi
Abstract
The invention relates to a fabric comprising carbon threads, said fabric having a mass per unit area in the range from 40 g/m2 to 100 g/m2, preferably in the range from 40 g/m2 to 80 g/m2, particularly in the range from 60 g/m2 to 80 g/m2, and characterised in that it comprises discontinuous fibres, said discontinuous fibres extending from threads constituting the fabric from which they come and extending non-parallel to the direction of the thread from which they come and/or in that the fabric is needled. The invention also relates to the use of said fabric in a diffusion layer for a fuel cell and a method for producing said diffusion layer.
B32B 25/10 - Layered products essentially comprising natural or synthetic rubber next to a fibrous or filamentary layer
D03D 13/00 - Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
D03D 15/00 - Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
D04H 1/46 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
12.
Process for making material with improved conductivity properties for the production of composite parts
A process for making a material adapted for the production of composite parts by a process in which a thermoplastic or thermosetting matrix is diffused within said material. The material includes at least one sheet of unidirectional carbon fibers associated on at least one of its faces with at least one conductive component associated or integrated with a permeable layer in a thermoplastic material or in a mixture of thermoplastic or thermosetting materials.
B29C 70/88 - Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
B29C 70/08 - Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, with or without non-reinforced layers
B29C 70/12 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of short length, e.g. in the form of a mat
B29C 70/20 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in a single direction, e.g. roving or other parallel fibres
H01B 1/22 - Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
H01B 1/24 - Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon, or silicon
B29C 70/48 - Shaping or impregnating by compression for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM]
2, associated on each of its faces, with a web of thermoplastic fibers having a thickness of 0.5 to 50 microns, preferably 3 to 35 microns, the intermediate material having a total thickness of 80 to 380 microns, preferably from 90 to 320 microns, and a process for manufacturing composite parts from such preforms and the resulting composite parts.
B29C 70/08 - Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, with or without non-reinforced layers
B29B 11/16 - Making preforms characterised by structure or composition comprising fillers or reinforcements
B29C 70/22 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
B29C 70/44 - Shaping or impregnating by compression for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
B29C 70/54 - Component parts, details or accessoriesAuxiliary operations
B32B 5/22 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous
B29K 63/00 - Use of epoxy resins as moulding material
B29K 105/08 - Condition, form or state of moulded material containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
B29K 277/00 - Use of polyamides, e.g. polyesteramides, as reinforcement
The present invention concerns a multilayer element comprising a reinforcing material suitable for producing composite parts combined on at least one of the faces of same with a support layer characterized in that the reinforcing material and the support layer are combined by means of electrostatic forces, and a method for preparing such a material and a method for producing a composite part produced from at least one reinforcing material obtained from such an element, after having removed the support layer.
B29B 11/16 - Making preforms characterised by structure or composition comprising fillers or reinforcements
B32B 5/12 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments characterised by the relative arrangement of fibres or filaments of adjacent layers
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
B29C 70/20 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in a single direction, e.g. roving or other parallel fibres
B29K 77/00 - Use of polyamides, e.g. polyesteramides, as moulding material
B29K 105/00 - Condition, form or state of moulded material
B29K 105/08 - Condition, form or state of moulded material containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
The present invention provides a tape with a given width, said tape being composed of an assembly of filaments extending in a direction substantially parallel to the length of the tape, and between which a powder of a polymeric material is distributed, each face of said tape being associated with a nonwoven of polymeric fibers.
B32B 5/16 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by features of a layer formed of particles, e.g. chips, chopped fibres, powder
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B29C 70/20 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in a single direction, e.g. roving or other parallel fibres
B29C 70/50 - Shaping or impregnating by compression for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
B32B 5/28 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer impregnated with or embedded in a plastic substance
B29C 70/02 - Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising combinations of reinforcements and fillers incorporated in matrix material, forming one or more layers, with or without non-reinforced or non-filled layers
16.
Method for making an intermediate reinforcing material consisting of an array of spaced-apart yarns/webs
The present invention relates especially to an intermediate material comprising, or even constituted exclusively by, an array of individualised ribbons, each ribbon being composed by a tape of unidirectional reinforcing fibres associated, by adhesion, on each of its faces with a veil of thermoplastic fibres, characterised in that the ribbons are disposed in successive layers, in such a way that the ribbons of two successive layers are superposed with or without crossing but without interlacement, the bond between a ribbon and the ribbon or ribbons with which it is superposed being ensured by adhesion, and in that in each layer the ribbons are disposed substantially parallel to each other over at least the major part of their length, while being independent and spaced from each other and in that the ribbons of at least two layers extend in two different directions.
B29C 70/20 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in a single direction, e.g. roving or other parallel fibres
B29C 70/08 - Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, with or without non-reinforced layers
B32B 5/08 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments the fibres or filaments of a layer being specially arranged or being of different substances
B32B 5/12 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments characterised by the relative arrangement of fibres or filaments of adjacent layers
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B32B 3/14 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material characterised by a face layer formed of separate pieces of material
B32B 3/18 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material characterised by an internal layer formed of separate pieces of material
B29K 263/00 - Use of epoxy resins as reinforcement
A method for spreading a textile sheet where the sheet is caused to run between at least two rotary rollers, the axes of which extend parallel to each other and substantially perpendicular to the running direction of sheet. The sheet under pressure is caused to pass between at least one pressure generator of the rollers driven into axial oscillation and in phase opposition. At least one pressure generator of the rollers has adjustable pressure values along the generator in order to spread the sheet with a low thickness variability.
D03D 13/00 - Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
D03D 15/00 - Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
18.
Material with improved conductivity properties for the production of composite parts in combination with a resin
B29C 70/88 - Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
B29C 70/08 - Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, with or without non-reinforced layers
H01B 1/22 - Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
H01B 1/24 - Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon, or silicon
B29C 70/12 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of short length, e.g. in the form of a mat
B29C 70/20 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in a single direction, e.g. roving or other parallel fibres
The present invention concerns a multilayer element comprising a reinforcing material suitable for producing composite parts combined on at least one of the faces of same with a support layer characterised in that the reinforcing material and the support layer are combined by means of electrostatic forces, and a method for preparing such a material and a method for producing a composite part produced from at least one reinforcing material obtained from such an element, after having removed the support layer.
B32B 5/12 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments characterised by the relative arrangement of fibres or filaments of adjacent layers
The present invention provides a method of preparing a tape with a given width, said tape being composed of an assembly of filaments extending in a direction substantially parallel to the length of the tape, and between which a powder of a polymeric material is distributed, each face of said tape being associated with a nonwoven of polymeric fibers, the method comprising: —a step consisting in depositing powder formed from a polymeric material on at least one of the faces of the tape, preferably on both faces; —a step consisting in heating in order to at least partially soften the deposited powder then of tightening the tape in order to adjust its width to the width desired and to cause at least a portion of the powder to penetrate into the thickness of the tape between the filaments, and of cooling the tape to fix its width and provide cohesiveness because of the powder; and—to tapes obtained using said method.
B29C 70/52 - Pultrusion, i.e. forming and compressing by continuously pulling through a die
B29C 70/02 - Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising combinations of reinforcements and fillers incorporated in matrix material, forming one or more layers, with or without non-reinforced or non-filled layers
B29C 70/20 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in a single direction, e.g. roving or other parallel fibres
B29C 70/50 - Shaping or impregnating by compression for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
B32B 5/28 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer impregnated with or embedded in a plastic substance
21.
FABRIC IN PARTICULAR MADE OF CARBON YARNS HAVING LOW THICKNESS VARIABILITY COMBINED WITH A SPECIFIC BASIS WEIGHT RANGE
Fabric having warp and weft yarns where filaments in the yarns freely move relatively to each other. The basis weight of the fabric is related to the thickness standard deviation of a stack of three identical fabrics deposited on each other. For basis weights greater than or equal to 40 g/m2 and less than 100 g/m2, the thickness standard deviation is less than or equal to 35 .mu.m. For basis weights greater than or equal to 100 g/m2 and less than or equal to 160 g/m2, the thickness standard deviation is less than or equal to 50 .mu.m. For basis weights greater than 160 g/m2 and less than or equal to 200 g/m2, the thickness standard deviation is less than or equal to 60 .mu.m. For basis weights greater than 200 g/m2 and less than or equal to 400 g/m2, the thickness standard deviation is less than or equal to 90 .mu.m.
The invention concerns a method for spreading a textile sheet (2) comprising at least warp yarns, wherein: the sheet (2) is made to pass between at least two rotary rollers (5), (6), of which the axes (A) extend parallel to one another and substantially perpendicular to the direction of travel of the sheet; the sheet is made to pass under pressure between at least one pressure generator (Si) of the rollers which are driven so as to oscillate axially and in phase opposition. According to the invention, at least one pressure generator of the rollers (5), (6) is produced with adjustable pressure values along the generator (G1) in order to spread the sheet (2) with a low degree of thickness variability. The invention also concerns a machine suitable for performing this method.
D03D 15/00 - Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
23.
METHOD AND MACHINE FOR SPREADING A FABRIC-TYPE TEXTILE SHEET
The invention concerns a method for spreading a textile sheet (2) comprising at least warp yarns, wherein: the sheet (2) is made to pass between at least two rotary rollers (5), (6), of which the axes (A) extend parallel to one another and substantially perpendicular to the direction of travel of the sheet; the sheet is made to pass under pressure between at least one pressure generator (Si) of the rollers which are driven so as to oscillate axially and in phase opposition. According to the invention, at least one pressure generator of the rollers (5), (6) is produced with adjustable pressure values along the generator (G1) in order to spread the sheet (2) with a low degree of thickness variability. The invention also concerns a machine suitable for performing this method.
The invention concerns a fabric composed of warp yarns and weft yarns, characterized by one of the following combinations of features: - a basis weight which is equal to or greater than 40 g/m2 and less than 100 g/m2 and a standard thickness variance measured on a pile of three identical fabrics disposed one on top of the other and in the same direction which is equal to or less than 35 μm; a basis weight which is equal to or greater than 100 g/m2 and equal to or less than 160 g/m2 and a standard thickness variance measured on a pile of three identical fabrics disposed one on top of the other and in the same direction which is equal to or less than 50 μm; a basis weight which is greater than 160 g/m2 and equal to or less than 200 g/m2 and a standard thickness variance measured on a pile of three identical fabrics disposed one on top of the other and in the same direction which is equal to or less than 60 μm; or a basis weight which is greater than 200 g/m2 and equal to or less than 400 g/m2 and a standard thickness variance measured on a pile of three identical fabrics disposed one on top of the other and in the same direction which is equal to or less than 90 μm. The invention is further characterized in that the warp yarns and/or the weft yarns consist of an assembly of filaments which can move freely relative to each other within the yarn.
METHOD OF APPLYING AN INTERMEDIATE MATERIAL MAKING IT POSSIBLE TO ENSURE THE COHESION THEREOF, METHOD OF FORMING A STACK INTENDED FOR THE MANUFACTURE OF COMPOSITE COMPONENTS AND INTERMEDIATE MATERIAL
The present invention relates to a method for continuously applying to an application surface an intermediate material consisting of a unidirectional layer of reinforcing fibres which is associated on at least one of its sides with a layer of thermoplastic and/or thermosetting material which represents no more than 10% of the total weight of the intermediate material, in which method: the intermediate material has, prior to being applied, undergone an operation involving the point-wise application of through-loads accompanied by heating causing a penetration of the thermoplastic and/or thermosetting material and creating connecting bridges within the thickness of the unidirectional layer of reinforcing fibres, the intermediate material is applied continuously with the simultaneous application of tension and pressure so as to apply to the application surface a side of the intermediate material that is in the process of being applied that corresponds to a layer of thermoplastic and/or thermosetting material and activating said layer of thermoplastic and/or thermosetting material during the application thereof so as to create a bond between the applied intermediate material and the application surface; to a method of forming a stack for creating composite components that implement said method and to various uses thereof.
B29C 70/20 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in a single direction, e.g. roving or other parallel fibres
B29C 70/44 - Shaping or impregnating by compression for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
B29C 70/38 - Automated lay-up, e.g. using robots, laying filaments according to predetermined patterns
B29C 70/54 - Component parts, details or accessoriesAuxiliary operations
B29C 70/56 - Tensioning reinforcements before or during shaping
B29B 11/16 - Making preforms characterised by structure or composition comprising fillers or reinforcements
B32B 7/08 - Interconnection of layers by mechanical means
B32B 27/12 - Layered products essentially comprising synthetic resin next to a fibrous or filamentary layer
B29C 70/08 - Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, with or without non-reinforced layers
26.
USE, IN THE MANUFACTURE OF A COMPOSITE COMPONENT, OF A PENETRATION OPERATION TO IMPROVE THE TRANSVERSE ELECTRIC CONDUCTIVITY OF THE COMPOSITE COMPONENT
Use, in the manufacture of a composite component made from a stack of reinforcing materials (R) of carbon fibres between which is interposed at least one layer of thermoplastic or thermoset material or of a mixture of thermoplastic and thermoset materials (CM), of an operation of applying penetrative spot loads to at least two layers that make up the stack and are positioned adjacent to one another in the stack, so as to pass in succession through at least one reinforcing material (R) and at least one layer of thermoplastic or thermoset material or of a mixture of thermoplastic and thermoset materials (CM) which are placed in superposed positions, in order to improve the transverse electric conductivity of the composite component obtained.
B29C 70/88 - Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
B29C 70/54 - Component parts, details or accessoriesAuxiliary operations
27.
MATERIAL WITH IMPROVED CONDUCTIVITY PROPERTIES FOR THE PRODUCTION OF COMPOSITE PARTS IN ASSOCIATION WITH A RESIN
The invention relates to a material (I) adapted for the production of composite parts by a process in which a thermoplastic or thermosetting matrix is diffused within said material, comprising at least one sheet (1) of unidirectional carbon fibres (2) associated on at least one of its faces with at least one conductive component (5) associated or integrated with a permeable layer (3a, 3b, 10) in a thermoplastic material or in a mixture of thermoplastic or thermosetting materials, said permeable layer being in the form of a fabric, a powder, a porous film, a knit, or, preferably, a non-woven (3a, 3b, 10),a process for fabricating composite parts using such a material and the composite parts that can be obtained by such a process.
B29B 11/16 - Making preforms characterised by structure or composition comprising fillers or reinforcements
B29C 70/08 - Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, with or without non-reinforced layers
B29C 70/12 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of short length, e.g. in the form of a mat
B29C 70/20 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in a single direction, e.g. roving or other parallel fibres
B29C 70/88 - Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
28.
MATERIAL WITH IMPROVED CONDUCTIVITY PROPERTIES FOR THE PRODUCTION OF COMPOSITE PARTS IN COMBINATION WITH A RESIN
The invention relates to a material (I) suitable for the production of composite parts via a process in which an external thermosetting or thermoplastic matrix is diffused within said material, comprising at least one web (1) of unidirectional carbon fibres (2) that is combined, on at least one of its faces, with at least one conductive component (5) combined with or integrated into a permeable layer (3a, 3b, 10) made of a thermoplastic material or made of a mixture of thermoplastic and thermosetting materials, said permeable layer being in the form of a woven fabric, a powder, a porous film, a knit, or, preferably, a non woven fabric (3a, 3b, 10), to a process for manufacturing composite parts using such a material and to the composite parts thereof being capable of being obtained by such a process.
B29C 70/08 - Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, with or without non-reinforced layers
B29C 70/88 - Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
B29B 11/16 - Making preforms characterised by structure or composition comprising fillers or reinforcements
B29C 70/12 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of short length, e.g. in the form of a mat
B29C 70/20 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in a single direction, e.g. roving or other parallel fibres
An intermediate material made up of an array of individualized ribbons, each ribbon being composed of a tape of unidirectional reinforcing fibers associated, by adhesion, on each of its faces with a veil of thermoplastic fibers.
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
B29C 70/08 - Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, with or without non-reinforced layers
B29C 70/20 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in a single direction, e.g. roving or other parallel fibres
B32B 5/08 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments the fibres or filaments of a layer being specially arranged or being of different substances
B32B 5/12 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments characterised by the relative arrangement of fibres or filaments of adjacent layers
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B32B 3/14 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material characterised by a face layer formed of separate pieces of material
B32B 3/18 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material characterised by an internal layer formed of separate pieces of material
30.
Diffusion layer for an electrochemical device and method for producing such a diffusion layer
H01M 4/82 - Multi-step processes for manufacturing carriers for lead-acid accumulators
C25B 9/10 - Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms including an ion-exchange membrane in or on which electrode material is embedded
The present invention provides a method of preparing a tape with a given width, said tape being composed of an assembly of filaments extending in a direction substantially parallel to the length of the tape, and between which a powder of a polymeric material is distributed, each face of said tape being associated with a nonwoven of polymeric fibers, the method comprising : - a step consisting in depositing powder formed from a polymeric material on at least one of the faces of the tape, preferably on both faces; - a step consisting in heating in order to at least partially soften the deposited powder then of tightening the tape in order to adjust its width to the width desired and to cause at least a portion of the powder to penetrate into the thickness of the tape between the filaments, and of cooling the tape to fix its width and provide cohesiveness because of the powder; and - to tapes obtained using said method.
B29C 70/20 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in a single direction, e.g. roving or other parallel fibres
B29C 70/50 - Shaping or impregnating by compression for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
B32B 5/24 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer
32.
Intermediate materials produced by means of intertwinning by interlacing voile yarns
The present invention provides an intermediate material composed of an assembly of overlapping and interlaced tapes, characterized in that at least some of the tapes, preferably all of the tapes, known as veiled tapes, are composed of a series of reinforcing yarns or filaments that extend in a direction parallel to the length of the tape to form a unidirectional sheet that is associated on each of its faces with a nonwoven formed from thermoplastic fibers, said two nonwovens providing said veiled tape with cohesiveness because of their thermoplastic nature, to a production method using said material for producing composite parts, and to the composite parts obtained.
B32B 5/08 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments the fibres or filaments of a layer being specially arranged or being of different substances
B29C 70/22 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
B29B 11/16 - Making preforms characterised by structure or composition comprising fillers or reinforcements
B29C 70/34 - Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or coreShaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression
D03D 15/00 - Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
33.
Multiaxial stack rigidly connected by means of weld points applied by means of inserted thermoplastic webs
The present invention relates to a stack of fibrous materials including at least two unidirectional carbon fiber layers, each extending in different directions, wherein each one of the unidirectional layers is connected by means of at least one of the surfaces thereof to an adjacent web of thermoplastic fibers, at least one web being inserted between two consecutive unidirectional layers, characterized in that the link between each unidirectional layer and each adjacent web is provided by the web, by weld points which produce an intermittent overall weld, and in that said weld points also guarantee the cohesion of the stack, as well as the method for manufacturing same.
B32B 5/08 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments the fibres or filaments of a layer being specially arranged or being of different substances
B32B 5/12 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments characterised by the relative arrangement of fibres or filaments of adjacent layers
B32B 5/22 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous
B32B 5/24 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B29B 11/16 - Making preforms characterised by structure or composition comprising fillers or reinforcements
B29C 70/10 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements
B29C 70/22 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
D04H 1/498 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres entanglement of layered webs
D04H 1/559 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving the fibres being within layered webs
B29K 105/08 - Condition, form or state of moulded material containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
The invention relates to an intermediate product intended for the production of a composite part in combination with a resin matrix, formed by at least two unidirectional sets of reinforcing yarns, the yams of each set extending in a different direction, whereby the sets are interlinked by means of stitching or knitting using at least one stitching or knitting yarn. The invention is characterized in that the stitching or knitting yarn has a yarn count of less than or equal to 30 dTex, preferably less than or equal to 25 dTex, in accordance with standard EN ISO 2060.
B32B 7/02 - Physical, chemical or physicochemical properties
B29C 70/04 - Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
D04B 1/00 - Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machinesFabrics or articles defined by such processes
D04H 3/115 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by applying or inserting filamentary binding elements
B29B 11/16 - Making preforms characterised by structure or composition comprising fillers or reinforcements
B32B 5/08 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments the fibres or filaments of a layer being specially arranged or being of different substances
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
B32B 7/08 - Interconnection of layers by mechanical means
D04H 3/04 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in rectilinear paths, e.g. crossing at right angles
D04B 21/16 - Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threadsFabrics incorporating small auxiliary elements, e.g. for decorative purposes incorporating synthetic threads
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
The present invention relates in particular to an intermediate material comprising, or consisting exclusively of, an array of individualized ribbons, each ribbon being composed of a mat of unidirectional reinforcing fibres and joined, by adhesive bonding, on each of the faces thereof, to a web of thermoplastic fibres, characterized in that the ribbons are arranged in successive layers, in such a way that the ribbons of two successive layers are superposed, with or without crossing but without interlacement, the bonding between one ribbon and the ribbon or ribbons with which it is superposed being provided by adhesive bonding, in that the ribbons in each layer are arranged so as to be substantially parallel to one another over at least a major portion of their length, while still being independent of one another and spaced apart, and in that the ribbons of at least two layers extend along two different directions.
B29C 70/08 - Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, with or without non-reinforced layers
B29C 70/20 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in a single direction, e.g. roving or other parallel fibres
B32B 5/28 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer impregnated with or embedded in a plastic substance
36.
Intermediate material with constant width for the direct process production of composite components
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B32B 3/02 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
B32B 27/04 - Layered products essentially comprising synthetic resin as impregnant, bonding, or embedding substance
B29C 70/08 - Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, with or without non-reinforced layers
B29C 70/14 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of short length, e.g. in the form of a mat oriented
B29C 70/20 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in a single direction, e.g. roving or other parallel fibres
B29C 70/50 - Shaping or impregnating by compression for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
B29C 70/54 - Component parts, details or accessoriesAuxiliary operations
B29B 15/12 - Coating or impregnating of reinforcements of indefinite length
B29K 105/08 - Condition, form or state of moulded material containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
B29K 105/00 - Condition, form or state of moulded material
37.
Reinforcement materials, suitable for the constitution of composite parts
2, associated on each of its faces, with a web of thermoplastic fibers having a thickness of 0.5 to 50 microns, preferably 3 to 35 microns, the intermediate material having a total thickness of 80 to 380 microns, preferably from 90 to 320 microns, and a process for manufacturing composite parts from such a material and the resulting composite parts.
B29C 70/08 - Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, with or without non-reinforced layers
B29C 70/22 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
B29C 70/44 - Shaping or impregnating by compression for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
B29C 70/54 - Component parts, details or accessoriesAuxiliary operations
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B32B 5/22 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous
38.
Head for the application of reinforcing threads on a deposition surface
An applicator head for cutting yarn into segments of yarn and depositing the segments of yarn on a deposition surface. The applicator head includes a single mechanism that moves the yarn towards said deposition surface and also cuts the yarn into segments.
COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES (France)
HEXCEL REINFORCEMENTS (France)
Inventor
Morin, Arnaud
Beraud, Jean-Marc
Jonquille, Jenny
Pauchet, Joël
Senecot, Jean-Marc
Abstract
Method for producing a diffusion layer for an electrochemical device, comprising the following steps: superposing a plurality of unidirectional webs (102a, 102b, 102c) of carbon filaments, the filaments of each web being deposited in parallel next to one another; needle punching the webs, piercing some of the filaments such that pierced portions of said filaments are entangled with other carbon filaments of the webs; cutting out part of the plurality of unidirectional webs, the carbon filaments forming an electrically conductive external surface of the diffusion layer, and in which method the needle-punching step punches right through the thickness of the plurality of webs, and/or through two opposed main faces (116, 118) of the plurality of webs, and/or with a density of impacts with the plurality of webs of between about 100 and 300 impacts/cm2.
The present invention relates to an intermediate material comprising a set of bands intertwined by interlacing, said material being characterized in that at least some of the bands, and preferably all of the bands, which are so-called voile bands, consist of a series of reinforcing threads or filaments that extend in a parallel direction for the length of the band so as to form a one-way sheet that is combined, on each surface thereof, with a thermoplastic fiber nonwoven, said two nonwovens ensuring the cohesion of said voile band due to the thermoplastic character thereof. The invention also relates to a manufacturing method that implements such material for creating composite parts and moreover relates to the resulting composite parts.
B29C 70/16 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length
B29C 70/22 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
D03D 15/00 - Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
41.
MULTIAXIAL STACK RIGIDLY CONNECTED BY MEANS OF WELD POINTS APPLIED BY MEANS OF INSERTED THERMOPLASTIC WEBS
The present invention relates to a stack of fibrous materials including at least two unidirectional carbon fibre layers, each extending in different directions, wherein each one of the unidirectional layers is connected by means of at least one of the surfaces thereof to an adjacent web of thermoplastic fibres, at least one web being inserted between two consecutive unidirectional layers, characterised in that the link between each unidirectional layer and each adjacent web is provided by the web, by weld points which produce an intermittent overall weld, and in that said weld points also guarantee the cohesion of the stack, as well as the method for manufacturing same.
B29B 11/16 - Making preforms characterised by structure or composition comprising fillers or reinforcements
B29C 70/08 - Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, with or without non-reinforced layers
B29C 70/10 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
The present invention relates to a stack of fibrous materials including at least two unidirectional carbon fibre layers, each extending in different directions, wherein each one of the unidirectional layers is connected by means of at least one of the surfaces thereof to an adjacent web of thermoplastic fibres, at least one web being inserted between two consecutive unidirectional layers, characterised in that the link between each unidirectional layer and each adjacent web is provided by the web, by weld points which produce an intermittent overall weld, and in that said weld points also guarantee the cohesion of the stack, as well as the method for manufacturing same.
B29B 11/16 - Making preforms characterised by structure or composition comprising fillers or reinforcements
B29C 70/10 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
43.
HEAD FOR THE APPLICATION OF REINFORCING THREADS ON A DEPOSITION SURFACE
Head for application of reinforcing filaments (2) on a deposition surface (3), this head comprising: a mechanism (8) for cutting the reinforcing threads (2) upstream of an application zone (5), comprising at least one cutting member (10) and a driving member (11) for moving the cutting member (10) on the one hand along a forward travel (f1), to allow the reinforcing threads (2) to be cut, and on the other hand a return travel (f2) in the opposite direction to the forward travel, to allow the cutting member (10) to be disengaged from the reinforcing threads (2); and a system (16) for re-routing the reinforcing threads (2) after they have been cut, at least as far as the application zone (5). The cutting mechanism (8) provides the motor drive for the re-routing system (16), having suitable means for, on the one hand, not entraining the reinforcing threads (2) during the forward travel (f1) of the cutting member (10) and, on the other hand, entraining the reinforcing threads (2) at least as far as the application zone (5) during the return travel (f2).
The invention relates to an intermediate product intended for the production of a composite part in combination with a resin matrix, formed by at least two unidirectional sets of reinforcing yarns, the yarns of each set extending in a different direction, whereby the sets are interlinked by means of stitching or knitting using at least one stitching or knitting yarn. The invention is characterised in that the stitching or knitting yarn has a yarn count of less than or equal to 30 dTex, preferably less than or equal to 25 dTex, in accordance with standard EN ISO 2060.
B29B 11/16 - Making preforms characterised by structure or composition comprising fillers or reinforcements
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
D04B 21/20 - Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machinesFabrics or articles defined by such processes specially adapted for knitting articles of particular configuration
D04H 3/10 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
The invention relates to an intermediate product intended for the production of a composite part in combination with a resin matrix, formed by at least two unidirectional sets of reinforcing yarns, the yarns of each set extending in a different direction, whereby the sets are interlinked by means of stitching or knitting using at least one stitching or knitting yarn. The invention is characterised in that the stitching or knitting yarn has a yarn count of less than or equal to 30 dTex, preferably less than or equal to 25 dTex, in accordance with standard EN ISO 2060.
B29B 11/16 - Making preforms characterised by structure or composition comprising fillers or reinforcements
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
D04B 21/20 - Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machinesFabrics or articles defined by such processes specially adapted for knitting articles of particular configuration
D04H 3/04 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in rectilinear paths, e.g. crossing at right angles
D04H 3/115 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by applying or inserting filamentary binding elements
The invention concerns a process for preparing a ribbon of reinforcement strands or filaments associated on each of its faces with a polymeric binder, said ribbon having a given width substantially constant over its entire length, in which the strands or filaments extend in a direction parallel to the length of the ribbon, wherein it comprises the following steps:a) adjustment of the ribbon width to the desired width thanks to a dimensioning device,b) association of the ribbon on each of its faces with a polymeric binder allowing the assurance of a homogenous cohesion of the ribbon, such that the total weight of the binder does not exceed 25 % of the total weight of the obtained ribbon,as well as the ribbons obtainable by such a process.
B29B 15/14 - Coating or impregnating of reinforcements of indefinite length of filaments or wires
B29C 70/08 - Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, with or without non-reinforced layers
B29C 70/14 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of short length, e.g. in the form of a mat oriented
B29C 70/20 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in a single direction, e.g. roving or other parallel fibres
B29C 70/50 - Shaping or impregnating by compression for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
B29C 70/54 - Component parts, details or accessoriesAuxiliary operations
47.
NOVEL INTERMEDIATE MATERIAL WITH CONSTANT WIDTH FOR THE DIRECT PROCESS PRODUCTION OF COMPOSITE COMPONENTS
The present invention relates to a method for preparing a band (I) of reinforcement threads (1) or filaments combined with a polymer binding agent (2a, 2b) on each of the surfaces thereof, said band having a substantially constant given width (L) along the entire length (l) thereof, wherein the threads or filament extend in a direction parallel to the length of the band, characterised in that the method includes the following steps: a) adjusting the width of the band to the desired width using a calibration means (13), b) combining the band with a binding agent on each of the surfaces thereof to ensure a uniform cohesion of the band, such that the total weight of the binding agent does not exceed 25 % of the total weight of the resultant band. The invention further relates to the bands that can be obtained by such a method.
B29C 70/08 - Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, with or without non-reinforced layers
B29C 70/14 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of short length, e.g. in the form of a mat oriented
B29C 70/20 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in a single direction, e.g. roving or other parallel fibres
B29C 70/50 - Shaping or impregnating by compression for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
B29C 70/54 - Component parts, details or accessoriesAuxiliary operations
B29B 15/14 - Coating or impregnating of reinforcements of indefinite length of filaments or wires
48.
REINFORCING MATERIALS DESIGNED FOR PRODUCING COMPOSITE PARTS
The present invention relates to a novel intermediate material for being combined with a thermosetting resin for the production of composite parts, said material consisting of a one-way layer of carbon fibres with a mass per unit area of 100 to 280 g/m2, combined, on each of the surfaces thereof, with a web of thermoplastic fibres having a thickness of 0.5 to 50 microns, preferably from 3 to 35 microns, the intermediate material having a total thickness of 80 to 380 microns, preferably from 90 to 320 microns. The invention further relates to a method for manufacturing composite parts using such a material and to the resulting composite parts.
B29C 70/08 - Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, with or without non-reinforced layers
B29C 70/42 - Shaping or impregnating by compression for producing articles of definite length, i.e. discrete articles
B29C 70/54 - Component parts, details or accessoriesAuxiliary operations
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
B32B 5/28 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer impregnated with or embedded in a plastic substance
49.
NOVEL REINFORCEMENT MATERIALS, SUITABLE FOR THE CONSTITUTION OF COMPOSITE PARTS
The present invention relates to a novel intermediate material for being combined with a thermosetting resin for the production of composite parts, said material consisting of a one-way layer of carbon fibres with a mass per unit area of 100 to 280 g/m2, combined, on each of the surfaces thereof, with a web of thermoplastic fibres having a thickness of 0.5 to 50 microns, preferably from 3 to 35 microns, the intermediate material having a total thickness of 80 to 380 microns, preferably from 90 to 320 microns. The invention further relates to a method for manufacturing composite parts using such a material and to the resulting composite parts.
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
B32B 5/28 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer impregnated with or embedded in a plastic substance
B29C 70/42 - Shaping or impregnating by compression for producing articles of definite length, i.e. discrete articles
B29C 70/08 - Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, with or without non-reinforced layers
B29C 70/54 - Component parts, details or accessoriesAuxiliary operations
50.
METHOD FOR MAKING COMPOSITE PARTS HAVING AT LEAST ONE CURVED AREA AND RESULTING PARTS
The invention relates to a method for making a composite part (I) including an assembly of superimposed webs of reinforcement threads imbedded at least partially in a polymer matrix, said part including at least one curved area (5) and the method comprising steps of draping or stacking plies of a composite material, characterised in that, in at least one area adjacent to a curved area, at least one draping or stacking step is carried out with a ply of composite material, that comprises a web, or twisted thread web (2), including at least one twisted reinforcement thread in order to at least compensate the length differences of the extreme paths of the thread on either side of the width as measured in a direction parallel to the surface of the web; the invention also relates to the composite materials thus obtained.
B29C 70/30 - Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or coreShaping by spray-up, i.e. spraying of fibres on a mould, former or core
B29C 70/10 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements
51.
METHOD FOR MAKING A COMPOSITE MATERIAL HAVING AT LEAST ONE TWISTED THREAD DEPOSITED THEREIN
The invention relates to a method for making a composite material in which at least one reinforcement thread is deposited on a surface according to a path having at least one curved area on the deposition surface, wherein the reinforcement thread is connected to the surface by a polymeric binder, characterised in that a twist is applied to the reinforcement thread before the deposition thereof at least in order to compensate the length differences of the extreme paths of the thread on either side of the width as measured in a direction parallel to the deposition surface; the invention also relates to the composite materials thus obtained.
