Abstract

The invention concerns a fibre reinforced polymer composite sheet (20), comprising impregnated fibres in a matrix (14), said matrix (14) comprising a polymeric material as main component, characterised in that it further comprises flake-like elements (12) which are fluid-impermeable, in at least one of the two surface layers, forming a moisture barrier surface layer (22). The invention concerns also a multilayer composite material with said fibre reinforced polymer composite sheet (20), a composite product with said multilayer composite material and the manufacturing method of said fibre reinforced polymer composite sheet (20). This moisture barrier surface layer (22) significantly reduces moisture uptake in said fibre reinforced polymer composite sheet (20), enabling protection under harsh humidity and temperature conditions.

IPC Classes  ?

• 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 5/14 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by a layer differing constitutionally or physically in different parts, e.g. denser near its faces
• 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 5/30 - 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 comprising granules or powder
• B32B 27/08 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of synthetic resin of a different kind
• B32B 27/20 - Layered products essentially comprising synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
• B32B 27/38 - Layered products essentially comprising synthetic resin comprising epoxy resins
• B32B 27/40 - Layered products essentially comprising synthetic resin comprising polyurethanes
• B32B 27/42 - Layered products essentially comprising synthetic resin comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines

Abstract

The invention concerns a tool assembly (40) for manufacturing thin-walled composite part with one face covered with ribs made from fibre yarns, comprising : - first and second compression tools (42, 41) arranged to cooperate together with their useful face (42', 41') facing each other in a moulding position delimiting a cavity, - a mould insert (50) removably attached on the useful face (42') of the first compression tool (42), wherein said mould insert (50) comprises a support (52) made in a first material having a first tensile Young's modulus larger than 1 GPa, and a elastomeric layer (51) mounted on the support (52), made in a second material having a second tensile Young's modulus, wherein said second tensile Young's modulus is at least 100 times smaller than the first tensile Young's modulus, and wherein said elastomeric layer (51) has a thickness between 1 and millimeters.

IPC Classes  ?

• B29C 33/30 - Mounting, exchanging or centering
• B29C 33/40 - Plastics, e.g. foam or rubber
• 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
• B29D 99/00 - Subject matter not provided for in other groups of this subclass
• 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 70/08 - 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 70/44 - 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

Abstract

The invention relates to an impregnated yarn, a ribbed thin-walled composite product comprising such an impregnated yarn, and a method of making them. Such an impregnated yarn (10d; 10e) comprises at least two continuous strands (10a; 10b) comprising plant fibers (11), said strands (10a; 10b) being impregnated with thermoplastic material (12a) in at least 60% of their volume, each of said strands (10a; 10b) being individually twisted and all of said strands (10a; 10b) also being twisted in a configuration (10d) held by the thermoplastic material (12a).

IPC Classes  ?

• D02G 3/40 - Yarns in which fibres are united by adhesivesImpregnated yarns or threads
• D06B 3/06 - Passing of textile materials through liquids, gases, or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of yarns, threads, or filaments individually handled
• D02G 3/44 - Yarns or threads characterised by the purpose for which they are designed
• D02G 3/38 - Threads in which fibres, filaments, or yarns are wound with other yarns or filaments
• B29B 15/12 - Coating or impregnating of reinforcements of indefinite length
• B29C 70/24 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length oriented in at least three directions forming a three dimensional structure
• B29C 70/42 - Shaping or impregnating by compression for producing articles of definite length, i.e. discrete articles

Abstract

A thin-walled organic-matrix composite product reinforced by yarns, the yarns compromising hybrid yarns, the hybrid yarns having a core made of a first material having a density less than 1500 kg/m3 and a cover covering the core, the cover being produced from a second material, the second material being different from the first material and having a longitudinal Young's modulus greater than 25 GPa, and the composite product having at least one ribbed face, the ribs being created at least partially by the hybrid yarns.

IPC Classes  ?

• 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 70/16 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length
• 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

Abstract

The invention relates to an impregnated thread, a ribbed thin-walled composite product comprising such an impregnated thread, and the method for manufacturing same. Such an impregnated thread (10d; 10e) comprises at least two continuous strands (10a; 10b) comprising plant fibers (11), said strands (10a; 10b) being impregnated with thermoplastic material (12a) in at least 60% of their volume, each of said strands (10a; 10b) being individually twisted (T1) and the assembly of said strands (10a; 10b) also being twisted (T2) in a configuration (10d) held by the thermoplastic material (12a).

IPC Classes  ?

• D02G 3/40 - Yarns in which fibres are united by adhesivesImpregnated yarns or threads
• B29C 70/16 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length

Abstract

The invention concerns a thin-walled organic-matrix composite product (30) reinforced by yarns, the yarns comprising hybrid yarns (20), the hybrid yarns (20) having a core (21) made of a first material having a density less than 1500 kg/m3 and a cover (22) covering the core (21), the cover (22) being produced from a second material, the second material being different from the first material and having a longitudinal Young's modulus greater than 25 GPa, and the composite product (30) having at least one ribbed face, the ribs (33) being created at least partially by the hybrid yarns (20).

IPC Classes  ?

• 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 70/16 - Fibrous reinforcements only characterised by the structure of fibrous reinforcements using fibres of substantial or continuous length
• B29D 99/00 - Subject matter not provided for in other groups of this subclass
• D02G 3/36 - Cored or coated yarns or threads
• D02G 3/44 - Yarns or threads characterised by the purpose for which they are designed
• 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

Abstract

The invention relates to a sheet-type or strip-type composite product, said product comprising a treillis (1) and a polymer, said treillis consisting of crisscrossed threads (3) defining mesh openings, said threads (3) consisting of fibres, each thread having an upper portion on the upper face of the treillis, a lower portion on the lower face of the treillis, and a median portion between the upper portion and the lower portion, the threads of said treillis being impregnated with said polymer, said impregnation being asymmetric such that the upper portion of the thread comprises a higher quantity of impregnated polymer than the lower part and the median part. The invention also relates to a method for producing said product, and to a device for producing said composite product.

IPC Classes  ?

• B29B 15/12 - Coating or impregnating of reinforcements of indefinite length

Abstract

Stiffened thin-walled natural fiber composite product having first fiber yarns (A), each first fiber having a first thickness, and second fiber yarns (B) having a second thickness larger than the first thickness. At least one side of said product is even. Applications for a seat post; a bicycle saddle; a bicycle frame; a bicycle handle bar; a baseball bat; a piece of furniture; a paddle; or a sheet for automotive applications.

IPC Classes  ?

• 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
• B29K 311/10 - Natural fibres, e.g. wool, cotton
• B29D 7/00 - Producing flat articles, e.g. films or sheets
• B29D 23/00 - Producing tubular 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 70/20 - 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
• B29D 99/00 - Subject matter not provided for in other groups of this subclass

Abstract

Stiffened thin-walled natural fibre composite product comprising: first fibre yarns (A), each first fibre having a first thickness,and second fibre yarns (B) having a second thickness larger than said first thickness, wherein at least one side of said product is even. Applications for a seat post; a bicycle saddle; a bicycle frame; a bicycle handle bar; a baseball bat; a piece of furniture; a paddle; or a sheet for automotive applications.

IPC Classes  ?

• 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 70/44 - 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 311/10 - Natural fibres, e.g. wool, cotton
• B29D 99/00 - Subject matter not provided for in other groups of this subclass