# US 10,118,365 B2 · Composite materials > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,118,365 B2 - Document ID: US10118365B2 - Status: Granted - Kind: B2 - Application number: 15/615,396 - Filed: 2017-06-06 - Published: 2017-09-21 - Granted: 2018-11-06 - Earliest claimed: 2010-07-20 - Assignees: Hexcel Composites Limited - Applicants: Hexcel Composites Limited - Inventors: Mark Whiter - Web page: https://patentgrep.com/patent/US10118365B2 ## CPC - B32B 5/26: another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)} - B32B 3/10: characterised by a discontinuous layer, i.e. formed of separate pieces of material - B32B 3/26: characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids {(foam layer B32B5/18; layer of synthetic resin characterised by fillers that create voids or cavities B32B27/205); characterised by an apertured layer} - B32B 5/02: characterised by structural features of a {fibrous or filamentary} layer {(layer formed of metallic wires B32B15/02; layer formed of natural mineral fibres B32B19/02; layer formed of wood fibres B32B21/02)} - B32B 5/08: the fibres or filaments of a layer being of different substances {, e.g. conjugate fibres, mixture of different fibres} - B32B 17/02: in the form of fibres or filaments - B32B 17/067: {of fibres or filaments} - B65G 59/00: De-stacking of articles (B65G60/00 takes precedence) - B65H 16/00: Unwinding, paying-out webs {(reel-to-reel type web winding and unwinding mechanisms B65H18/103, B65H18/145)} - B65H 18/28: Wound package of webs - B32B 2250/20: All layers being fibrous or filamentary - B32B 2260/021: Fibrous or filamentary layer - B32B 2260/046: Synthetic resin - B32B 2262/02: Synthetic macromolecular fibres - B32B 2262/0269: Aromatic polyamide fibres - B32B 2262/10: Inorganic fibres - B32B 2262/101: Glass fibres - B32B 2262/106: Carbon fibres, e.g. graphite fibres - B32B 2262/14: Mixture of at least two fibres made of different materials - B32B 2307/542: Shear strength - B32B 2307/546: Flexural strength; Flexion stiffness - B32B 2307/72: Density - B32B 2307/724: Permeability to gases, adsorption - B32B 2307/732: Dimensional properties - Y10T 428/23979: Particular backing structure or composition - Y10T 428/24802: Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] - Y10T 428/249921: Web or sheet containing structurally defined element or component - Y10T 428/249953: Composite having voids in a component [e.g., porous, cellular, etc.] - Y10T 428/249979: Specified thickness of void-containing component [absolute or relative] or numerical cell dimension - Y10T 428/27: Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.] - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - B65G: TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS (packaging B65B; handling thin or filamentary materials, e.g. paper sheets or thread, B65H; cranes B66C; portable mobile or lifting or hauling appliances, e.g. hoists, B66D; devices for lifting or lowering goods for loading or unloading purposes, e.g. fork-lift trucks, B66F9/00; emptying bottles, jars, casks, barrels or similar containers, not otherwise provided for, B67C9/00; delivering or transferring liquids B67D; filling or discharging vessels for liquefied, solidified or compressed gases F17C; pipe-line systems for fluids F17D) - B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A curable sheet-like composite material comprising a layer of curable resin and at least one layer of structural fibres and comprising an outer backing layer of substantially resin-free material which is gas permeable but is substantially non-permeable with respect to the curable resin at room temperature. ## Claims ### Claim 1 A semipreg having a first surface and a second surface which define the thickness of said semipreg, said semipreg being of sufficient thickness and flexibility to be formable into a roll of semipreg where said first surface and second surface are in contact with each other and wherein said roll of semipreg can be unrolled, said semipreg comprising: a first structural layer comprising a layer of structural fibers, said first structural layer having an inner side and an outer side; a second structural layer comprising a layer of structural fibers, said second structural layer having an inner side and an outer side; a layer of resin located between said first structural layer and second structural layer wherein the inner sides of said first structural layer and said second structural layer are in contact with said layer of resin; a layer of polymeric fleece comprising non-woven polymeric fibers, said layer of polymeric fleece having an inner side and an outer side wherein the inner side of said layer of polymeric fleece is in contact with the outer side of said first structural layer and the outer side of said layer of polymeric fleece forms the first surface of said semipreg; and a layer of glass fleece comprising non-woven glass fibers, said layer of glass fleece having an inner side and an outer side wherein the inner side of said layer of glass fleece is in contact with the outer side of said second structural layer and the outer side of said layer of glass fleece forms the second surface of said semipreg and wherein said layer of glass fleece is separable during unrolling of said roll of semipreg such that a portion of said layer of glass fleece becomes attached to the first surface of said semipreg. ### Claim 2 (depends on 1) A semipreg according to claim 1 wherein said structural fibers in said first and second structural layers are unidirectional fibers. ### Claim 3 (depends on 2) A semipreg according to claim 2 wherein said unidirectional fibers are glass fibers. ### Claim 4 (depends on 1) A semipreg according to claim 1 wherein said polymeric fibers in said polymeric fleece comprise a phenoxy material. ### Claim 5 (depends on 1) A semipreg according to claim 1 wherein the weight per unit area of said layer of polymeric fleece is from 10 to 100 grams per square meter and wherein the weight per unit area of said layer of glass fleece is from 10 to 100 grams per square meter. ### Claim 6 (depends on 1) A semipreg according to claim 1 wherein the thickness of said layer of polymeric fleece is from 50 to 200 micrometers and wherein the thickness of said layer of glass fleece is from 50 to 200 micrometers. ### Claim 7 (depends on 6) A semipreg according to claim 6 wherein the weight per unit area of said layer of polymeric fleece is from 15 to 75 grams per square meter and wherein the weight per unit area of said layer of glass fleece is from 15 to 75 grams per square meter. ### Claim 8 (depends on 7) A semipreg according to claim 7 wherein the weight per unit area of said layer of glass fleece is from 30 to 50 grams per square meter. ### Claim 9 (depends on 1) A semipreg according to claim 1 wherein the mean pore size of said layer of polymeric fleece is from 10 to 100 micrometers and wherein the mean pore size of said layer of glass fleece is from 10 to 100 micrometers. ### Claim 10 (depends on 1) A semipreg according to claim 1 wherein the thickness of said semipreg is from 0.5 mm to 5.0 mm. ### Claim 11 (depends on 1) A roll of semipreg comprising semipreg according to claim 1 which has been formed into a roll in which the first surface of said semipreg is in contact with the second surface of said semipreg and wherein said resin layer has migrated into said first and second structural layers to form a partially impregnated first and second structural layers. ### Claim 12 (depends on 11) A roll of semipreg according to claim 11 wherein said structural fibers in said first and second structural layers are unidirectional fibers. ### Claim 13 (depends on 12) A roll of semipreg according to claim 12 wherein said unidirectional fibers are glass fibers. ### Claim 14 (depends on 11) A roll of semipreg according to claim 11 wherein said polymeric fibers in said polymeric fleece comprise a phenoxy material. ### Claim 15 (depends on 11) A roll of semipreg according to claim 11 wherein the weight per unit area of said layer of polymeric fleece is from 10 to 100 grams per square meter and wherein the weight per unit area of said layer of glass fleece is from 10 to 100 grams per square meter. ### Claim 16 (depends on 11) A roll of semipreg according to claim 11 wherein the thickness of said layer of polymeric fleece is from 50 to 200 micrometers and wherein the thickness of said layer of glass fleece is from 50 to 200 micrometers. ### Claim 17 (depends on 16) A roll of semipreg according to claim 16 wherein the weight per unit area of said layer of polymeric fleece is from 15 to 75 grams per square meter and wherein the weight per unit area of said layer of glass fleece is from 15 to 75 grams per square meter. ### Claim 18 (depends on 16) A roll of semipreg according to claim 16 wherein the weight per unit area of said layer of glass fleece is from 30 to 50 grams per square meter. ### Claim 19 (depends on 11) A roll of semipreg according to claim 11 wherein the mean pore size of said layer of polymeric fleece is from 10 to 100 micrometers and wherein the mean pore size of said layer of glass fleece is from 10 to 100 micrometers. ### Claim 20 (depends on 11) A roll of semipreg according to claim 11 wherein the thickness of said semipreg is from 0.5 mm to 5.0 mm.