An assembly (113) for composite manufacture is provided. The assembly comprises a cured resin impregnated reinforcement material (112) comprising a fibre component and a resin matrix component, in which the resin matrix component comprises polyurethane, the assembly having a length to width ratio of at least 5:1, and the assembly defining a longitudinal direction (L) along its length; and a peel ply (116) in contact with the cured resin impregnated reinforcement material (112), the peel ply (116) comprising a woven layer having a plurality of longitudinal fibres (118) extending in the longitudinal direction (L); and a plurality of transverse fibres (120) extending in a transverse direction (T) normal to the longitudinal direction (L); in which the areal density of the plurality of transverse fibres (120) is higher than the areal density of the plurality of longitudinal fibres (118).
B29C 70/52 - Pultrusion, i.e. forming and compressing by continuously pulling through a die
B29C 70/54 - Component parts, details or accessories; Auxiliary operations
B29C 70/68 - Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers
An assembly (113) for composite manufacture is provided. The assembly comprises a cured resin impregnated reinforcement material (112) comprising a fibre component and a resin matrix component, in which the resin matrix component comprises polyurethane, the assembly having a length to width ratio of at least 5:1, and the assembly defining a longitudinal direction (L) along its length; and a peel ply (116) in contact with the cured resin impregnated reinforcement material (112), the peel ply (116) comprising a woven layer having a plurality of longitudinal fibres (118) extending in the longitudinal direction (L); and a plurality of transverse fibres (120) extending in a transverse direction (T) normal to the longitudinal direction (L); in which the areal density of the plurality of transverse fibres (120) is higher than the areal density of the plurality of longitudinal fibres (118).
A curative resin containing at least 50 wt % of an epoxy phenolic resin comprising a mixture of a carboxylic hydrazide and a hydroxy substituted urone.
C08G 59/68 - Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups characterised by the catalysts used
C08G 59/40 - Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups characterised by the curing agents used
A reinforcing composite comprising a plurality of layers of reinforcing composite material forming a stack wherein at least one layer of the stack comprises a moulding compound (114) comprising consolidated resin impregnated fiber elements, wherein the resin impregnated fiber elements are obtained from off-cuts or scrap material (112) derived from cutting single layers of reinforcing composite material and/or stacks comprising multiple layers of reinforcing composite material (110).
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 17/00 - Recovery of plastics or other constituents of waste material containing plastics
B29C 70/54 - Component parts, details or accessories; Auxiliary operations
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
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
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 63/00 - Use of epoxy resins as moulding material
The invention provides a method of manufacturing a preform (120) from a reinforcement fabric by depositing a first fibre layer (112) and depositing a second fibre layer (114) partially over the first layer before cutting a plurality of preforms from the reinforcement fabric.
There is provided a process for preparing a prepreg (31) comprising reinforcement fibre (13) impregnated with a thermosetting resin matrix (20), said process comprising: a) providing a layer (24) of reinforcement fibre (13); b) applying a layer (24) of a first thermosetting resin matrix (20) to the first surface (15) of the layer (24) of reinforcement fibre (13) and bringing the first surface (15) of the layer (24) of reinforcement fibre (13) into contact with the support surface (5) of a first continuous belt (3), so that the layer (24) of first thermosetting resin matrix (20) is positioned between, and in contact with, the first surface (15) of the layer (24) of reinforcement fibre (13) and the support surface (5) of the first continuous belt (3); c) heating the layer (24) of first thermosetting resin matrix (20) applied to the first surface (15) of the layer (24) of reinforcement fibre (13) in contact with the support surface (5) of the first continuous belt (3); d) bringing the second surface (17) of the layer (24) of reinforcement fibre (13) into contact with the support surface 9) of a second continuous belt (7); e) heating the layer (24) of first thermosetting resin matrix (20) and the layer (24) of reinforcement fibre (13) between the support surfaces of the first and second continuous belts (3, 7) so that the first thermosetting resin matrix (20) impregnates the layer (24) of reinforcement fibre (13); f) cooling the layer (24) of reinforcement fibre (13) impregnated with the first thermosetting resin matrix (20) between the support surfaces of the first and second continuous belts (3, 7); and g) removing the layer (24) of reinforcement fibre (13) impregnated with the first thermosetting resin matrix (20) from the support surfaces of the first and second continuous belts (3, 7).
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]
B29B 15/12 - Coating or impregnating of reinforcements of indefinite length
A mould for moulding materials, the mould comprising at least two corresponding mould elements (14, 16, 18, 20) moveable relative to one another towards and away from each other, the towards movement exerting pressure on a moulding material positioned within a cavity formed with the mould wherein upon the mould elements being in contact the mould cavity comprises a recess (120), the recess (120) being located beyond the edge of the moulding to allow escape of gas (12) during moulding.
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
B32B 15/14 - Layered products essentially comprising metal next to a fibrous or filamentary layer
B29C 33/00 - SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING - Details thereof or accessories therefor
B29B 11/16 - Making preforms characterised by structure or composition comprising fillers or reinforcements
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
B32B 7/12 - Interconnection of layers using interposed adhesives or interposed materials with bonding properties
8.
Fast cure epoxy resins and prepregs obtained therefrom
This invention relates to a composition comprising a semisolid epoxy resin containing a curative dispersed therein. The curative has a particle size such that at least 90% of the particles have a size below 25 pm at ambient temperature of 21° C., wherein the composition further comprises a diluent containing a particulate filler. The composition is used as matrix in prepregs. The use of the diluent increases peel strength of the composition when brought into contact with metal or wood substrate.
C08J 5/10 - Reinforcing macromolecular compounds with loose or coherent fibrous material characterised by the additives used in the polymer mixture
C08G 59/40 - Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups characterised by the curing agents used
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
A63C 5/12 - Making thereof; Selection of particular materials
C08J 5/04 - Reinforcing macromolecular compounds with loose or coherent fibrous material
C08J 5/24 - Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
C08G 59/68 - Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups characterised by the catalysts used
C08L 63/00 - Compositions of epoxy resins; Compositions of derivatives of epoxy resins
B32B 15/092 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin comprising epoxy resins
9.
IMPROVEMENTS IN OR RELATING TO FIBRE REINFORCED COMPOSITES
A reinforcing composite comprising a plurality of layers of reinforcing composite material forming a stack wherein at least one layer of the stack comprises a moulding compound (114) comprising consolidated resin impregnated fiber elements, wherein the resin impregnated fiber elements are obtained from off-cuts or scrap material (112) derived from cutting single layers of reinforcing composite material and/or stacks comprising multiple layers of reinforcing composite material (110).
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 70/46 - 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
B29C 70/54 - Component parts, details or accessories; Auxiliary operations
B29B 17/00 - Recovery of plastics or other constituents of waste material containing plastics
B29C 43/00 - Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
10.
IMPROVEMENTS IN OR RELATING TO FIBRE REINFORCED COMPOSITES
The invention relates to a reinforcing composite comprising a plurality of layers of reinforcing composite material forming a stack wherein the number of layers and/or orientation of composite material that are employed at locations within the stack that are subject to elevated in-use stress in comparison with other locations within the stack according to an in-use stress evaluation of the stack, is increased with additional layers of composite material which are provided at the increased in-use stress locations.
B29C 70/86 - Incorporating in coherent impregnated reinforcing layers
B29C 70/30 - Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
B29L 31/30 - Vehicles, e.g. ships or aircraft, or body parts thereof
This invention relates to a composition comprising a semisolid epoxy resin containing a curative dispersed therein. The curative has a particle size such that at least 90 % of the particles have a size below 25 pm at ambient temperature of 21°C, wherein the composition further comprises a diluent containing a particulate filler. The composition is used as matrix in prepregs. The use of the diluent increases peel strength of the composition when brought into contact with metal or wood substrate.
C08J 5/24 - Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
C08J 5/10 - Reinforcing macromolecular compounds with loose or coherent fibrous material characterised by the additives used in the polymer mixture
C08G 59/40 - Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups characterised by the curing agents used
The use of a protection thread for the protection of a heat curable resin impregnated fibrous web. The web has weft and warp fibres, wherein the thread has a coefficient of thermal expansion within 10% of that of the heat curable resin impregnated fibres of the fibrous web, and wherein the coefficient of thermal expansion is measured using DIN 53752.
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
This invention relates to a non-woven fabric comprising spaced tows in a weft direction and spaced tows in a warp direction, wherein the weft tows and the warp tows are conjoined. The fabric may comprise a binder for conjoining the tows. Alternatively, the tows are conjoined by means of a resin.
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
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 70/54 - Component parts, details or accessories; Auxiliary operations
C08J 5/24 - Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
D04H 3/08 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
A molding material comprising a fibrous reinforcement layer and a curable resin matrix. The fibrous reinforcement layer comprises a non-woven fabric comprising a single layer of unidirectional tows arranged at an angle greater than 0° in relation to the lengthwise direction of the fabric and a support structure for maintaining the arrangement of the tows.
B32B 5/10 - 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 reinforced with filaments
D04H 1/74 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel
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
C08J 5/24 - Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
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 27/12 - Layered products essentially comprising synthetic resin next to a fibrous or filamentary 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
B32B 7/12 - Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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 15/12 - Coating or impregnating of reinforcements of indefinite length
B29L 31/08 - Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
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
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 37/20 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of continuous webs only
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]
A method of producing molded articles. The method uses a fibrous material and a first and second resin material. The first resin material is at least partially cured before being combined with the fibrous material and the second resin material. The molding material is inserted into a mold and processed to form a molded article by providing energy. The molded article is produced using less energy than would be necessary for processing a molding material which did not include a partially cured first resin material.
A laminated structure comprising a plurality of layers of fibre reinforced thermoset resin in which the layers are selected from two or more of the following i) a first moulding material comprising a layer of curable resin and a fibrous material on at least one side of the curable resin matrix, said moulding material further comprising a further fibrous layer adhered to the fibrous reinforcement material; ii) a second moulding material comprising a fibrous material comprising two cross bonded fibrous plies, each ply comprising fibre tows oriented at differing angles, the fibrous material further comprising a curable resin matrix; iii) a third moulding material comprising at least two reinforcement layers having unidirectional fibre tows and a curable resin matrix bonding the layers together; iv) a fourth moulding material comprising a layer of fibrous reinforcement and a curable liquid resin wherein the fibrous reinforcement comprises a plurality of tows each tow comprising a plurality of filaments wherein resin is provided at least partially between interstices between tows of the fibrous reinforcement to provide an air venting path in at least the interior of the tows; and v) a resin impregnated fibrous 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
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 70/20 - 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
F03D 9/00 - Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
A method of manufacturing a laminate structure comprising locating one or more layers of a fibrous reinforcement material being at least partially impregnated with a curable first resin matrix in relation to one or more layers of fibrous reinforcement material to form a stack and subsequently infusing the stack with a second infusion resin to cure the first and second resin.
B29C 70/86 - Incorporating in coherent impregnated reinforcing layers
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 accessories; Auxiliary operations
A cured or partly cured fiber reinforced sheet material comprising reinforcement fibres and a reinforcement resin material, wherein the reinforcement resin material comprises an epoxy resin having an epoxy equivalent weight in the range of from 50 to 250, preferably from 100 to 200, and an amine hardener, the sheet material comprising a surface structure for spacing the sheet material from adjacent moulding materials.
C08J 5/24 - Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
C08G 59/40 - Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups characterised by the curing agents used
C08L 63/00 - Compositions of epoxy resins; Compositions of derivatives of epoxy resins
A moulding material comprising a fibrous reinforcement layer and a curable resin matrix. The fibrous reinforcement layer comprises a non-woven fabric comprising a single layer of unidirectional tows arranged at an angle greater than 0° in relation to the lengthwise direction of the fabric and a support structure for maintaining the arrangement of the tows.
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 5/10 - 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 reinforced with filaments
D04H 1/74 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel
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
20.
FAST CURE EPOXY RESINS AND PREPREGS OBTAINED THEREFROM
Fast cure resin system comprise semisolid epoxy resins and finely divided curatives of particle size less than 25 microns. The resins are dry to the touch, can be readily combined with fibrous reinforcement to provide prepregs which can be rapidly cured in a short moulding cycle.
C08G 59/40 - Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups characterised by the curing agents used
C08L 63/00 - Compositions of epoxy resins; Compositions of derivatives of epoxy resins
C08J 5/24 - Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
The present invention regards a fiber-reinforced composite molding with an outer (102) structure and an inner structure (106), wherein the outer structure (102) is formed from at least one layer of fibrous reinforcing material and a cured first resin material, and the inner structure (106) is formed from a plurality of layers of fibrous reinforcing material and a second cured resin material, wherein the viscosity of the uncured first resin material is lower than the viscosity of the uncured second resin material and wherein in the composite molding the two cured resin materials are at least partially mixed with each other. It also regards a process for the production of such a fiber-reinforced composite molding.
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 70/48 - 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 70/54 - Component parts, details or accessories; Auxiliary operations
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
B29D 99/00 - Subject matter not provided for in other groups of this subclass
B32B 3/26 - Layered products essentially comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products essentially having particular features of form characterised by a layer with cavities or internal voids
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
B29C 45/14 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
B29L 31/08 - Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
A process for the preparation of a prepreg comprising superimposing layer of unidirectional fibrous reinforcement comprising a plurality of tows each comprising a plurality of parallel filaments onto a resin impregnated layer of unidirectional fibrous reinforcement comprising a plurality of tows each comprising a plurality of parallel filaments wherein the superimposed laminate of layers is compressed to the extent that the resin penetrates the interstices between the tows but penetrates the voids within the tows to less than 22 to 60% by volume of the tows.
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 70/46 - 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
B29C 70/54 - Component parts, details or accessories; Auxiliary operations
B29B 15/12 - Coating or impregnating of reinforcements of indefinite length
B29B 11/16 - Making preforms characterised by structure or composition comprising fillers or reinforcements
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]
23.
IMPROVEMENTS IN OR RELATING TO FIBRE REINFORCED COMPOSITES
Prepregs and stacks of prepregs based on reactive epoxy resins that can be cured at lower externally applied temperatures such as from 70°C to 110°C with acceptably short cycle times comprise epoxy resins of epoxy equivalent weight from 200 to 500 containing a curing agent but no hardener.
C08J 5/24 - Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
C08J 5/04 - Reinforcing macromolecular compounds with loose or coherent fibrous material
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 5/24 - 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 5/28 - 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
A method of manufacturing a moulded article and a moulding material suitable therefor comprising the steps of providing a moulding material comprising a fibrous reinforcement material, a first resin material and a second resin material, the first resin material being at least partially processed; providing the moulding material in relation to a mould to form a moulding; and processing the moulding to form the moulded article by providing energy input to the moulding. The energy input for processing the moulding to form the moulded article is less than the energy input required for processing the moulded article from a moulding.
A module (1) for holding at least one bushing (17) within a recess, wherein it comprises two side surfaces (2, 3), an upper (4) and a lower (5) surface and at least one end surface (6), wherein the upper (4) and lower (5) surfaces are of different width and arcs, respectively, in their cross-section, and the side surfaces (2, 3) are of equal height, and when coupled to a second module (8) by its side surfaces (3, 9), which second module (8) optionally may also hold at least one bushing (17), the sum of the angle (alpha) between the optionally imaginary plane side surface (12) of the one module (1) and the tangent (10) to its upper surface (4) at the intersection (A) with the side surface (3) and the angle (beta) between the optionally imaginary plane side surface (13) of the other module (8) and the tangent (11) to its upper surface (15) at the intersection (B) with the side surface (9) is at least 180 degrees and/or a plurality of modules (1), optionally when holding the bushings (17), form at least a section of a circular ring or a full circular ring.
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
B29K 105/24 - Condition, form or state of moulded material cross-linked or vulcanised
B29C 70/86 - Incorporating in coherent impregnated reinforcing layers
The present invention regards a fibre-reinforced composite moulding with an outer (102) structure and an inner structure (106), wherein the outer structure (102) is formed from at least one layer of fibrous reinforcing material and a cured first resin material, and the inner structure (106) is formed from a plurality of layers of fibrous reinforcing material and a second cured resin material, wherein the viscosity of the uncured first resin material is lower than the viscosity of the uncured second resin material and wherein in the composite moulding the two cured resin materials are at least partially mixed with each other. It also regards a process for the production of such a fibre-reinforced composite moulding.
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 70/08 - 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 accessories; Auxiliary operations
27.
Prepregs for use in building lay-ups of composite materials and processes for their preparation
The invention concerns a process for making a scrim-reinforced prepreg for use in building low-porosity lay-ups, characterized in that a conventional prepreg is formed of a fibrous reinforcement and a heat-curable resin, the prepreg having suitable viscosity and sufficient tackiness to hold a scrim which is adhered to the prepreg by applying light pressure, so that the scrim is impressed onto the prepreg to such a degree, that less than half of the circumference of the scrim strands becomes coated by the prepreg-resin.
The invention relates to a method for producing sliding equipment and to sliding equipment that can be produced by this method. According to said method, profiled edges (5), a lower chord (6) and an upper or shell chord (8) are introduced into a mould (1, 2), which has a corresponding shape for the sliding equipment and the mould is filled with foam in a resin foam injection process. Said sliding equipment includes in particular winter sport equipment, e.g. skis and snowboards. To produce the sliding equipment, special upper or shell chords (8), which can be fixed by particularly advantageous profiled edges (5), are used, thus simplifying the production method to a significant degree.
B29C 44/16 - Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining shaped by the expansion of the material
B29C 44/12 - Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
A63C 5/048 - Structure of the surface thereof of the edges
A63C 5/12 - Making thereof; Selection of particular materials
patents
