# US 5,326,630 A · Reinforcing fiber sheet, method of manufacturing the same, and method of reinforcing structure with the reinforcing fiber sheet > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,326,630 A - Document ID: US5326630A - Status: Granted - Kind: A - Application number: 08/031,436 - Filed: 1993-03-15 - Granted: 1994-07-05 - Earliest claimed: 1990-01-30 - Assignees: Tonen Corporation - Inventors: Makoto Saito; Makoto Takezawa; Hiroshi Inoue - Web page: https://patentgrep.com/patent/US5326630A ## CPC - B32B 5/24: one layer being a fibrous or filamentary layer - B29C 63/0021: {with coherent impregnated reinforcing layers} - B29C 70/083: {Combinations of continuous fibres or fibrous profiled structures oriented in one direction and reinforcements forming a two dimensional structure, e.g. mats (B29D24/00, B29D99/001 take precedence)} - B29C 70/086: {and with one or more layers of pure plastics material, e.g. foam layers (applying a non-preformed coating, e.g. a gel-coat, B29C37/0025; with foam blocks B29C70/86)} - B29C 70/088: {and with one or more layers of non-plastics material or non-specified material, e.g. supports} - B29C 70/20: oriented in a single direction, e.g. roofing or other parallel fibres {(B29C70/083, B29C70/226 take precedence)} - B29C 70/504: {using rollers or pressure bands (for corrugating B29C53/22)} - 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 7/12: using interposed adhesives or interposed materials with bonding properties - B29C 63/00: Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor (B29C73/00 takes precedence; by blowing B29C49/00; by thermoforming B29C51/00) - B29L 2031/10: Building elements, e.g. bricks, blocks, tiles, panels, posts, beams {(frameless domes B29L2025/00, doors B29L2031/724)} - B32B 2305/07: Parts immersed or impregnated in a matrix - B32B 2305/08: Reinforcements - Y10T 442/133: Inorganic fiber-containing scrim - Y10T 442/2115: At least one coating or impregnation functions to fix pigments or particles on the surface of a coating or impregnation - Y10T 442/2992: Coated or impregnated glass fiber fabric - Y10T 442/60: Nonwoven fabric [i.e., nonwoven strand or fiber material] - Y10T 442/67: Multiple nonwoven fabric layers composed of the same inorganic strand or fiber material - Y10T 442/697: Containing at least two chemically different strand or fiber materials - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - B29C: 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 (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A reinforcing fiber sheet is provided which includes a support sheet and reinforcing fibers. The fibers are arranged in one direction on at least one surface of the support sheet and attached thereto through an adhesive layer. There is also provided a method of reinforcing a structure, which includes arranging bundles of the reinforcing fibers in one direction on at least one surface of a support sheet in parallel apart from each other or close to each other, wherein the surface of the support sheet is coated with an adhesive layer. Thereafter, pressing the bundles against the support sheet such that the reinforcing fibers are adhered through the adhesive layer to the support sheet in one direction in a slightly unfastened state to thereby produce the reinforcing fiber sheet. ## Claims ### Claim 1 A reinforcing fiber sheet comprising: (a) a resin-penetrable support sheet; and (b) reinforcing fibers which have not yet been impregnated with a matrix resin, said fibers being arranged in one direction on one of the surfaces of said support sheet and attached to the surface with an adhesive layer. ### Claim 2 (depends on 1) A reinforcing fiber sheet according to claim 1, wherein the support sheet comprises a glass cloth having a thickness of 100 .mu.m or less. ### Claim 3 (depends on 2) A reinforcing fiber sheet according to claim 2, wherein the adhesive layer contains a curing accelerator for accelerating the setting of a room-temperature setting type matrix resin. ### Claim 4 (depends on 1) A reinforcing fiber sheet according to claim 1, wherein the adhesive layer contains a curing accelerator for accelerating the setting of a room-temperature setting type matrix resin. ### Claim 5 A reinforcing fiber sheet comprising: (a) a support sheet; and (b) reinforcing fibers which have not yet been impregnated with a matrix resin, said fibers being arranged in one direction on one of the surfaces of said support sheet and attached to the surface with an adhesive layer, wherein the adhesive layer contains a curing accelerator for accelerating the setting of a room-temperature setting type matrix resin. ### Claim 6 (depends on 5) A reinforcing fiber sheet according to claim 5, wherein the matrix resin comprises an unsaturated polyester resin in which a peroxide type curing agent is present, the adhesive layer comprises an epoxy resin, and the curing accelerator comprises a cobalt type curing accelerator. ### Claim 7 (depends on 4) A reinforcing fiber sheet according to claim 4, wherein the matrix resin comprises an unsaturated polyester resin in which a peroxide type agent is present, the adhesive layer comprises an epoxy resin, and the curing accelerator comprises a cobalt type curing accelerator. ### Claim 8 (depends on 3) A reinforcing fiber sheet according to claim 3, wherein the matrix resin comprises an unsaturated polyester resin in which a peroxide type curing agent is present, the adhesive layer comprises an epoxy resin, and the curing accelerator comprises a cobalt type curing accelerator. ### Claim 9 A reinforcing fiber sheet comprising: (a) a support sheet; and (b) reinforcing fibers which have not yet been impregnated with a matrix resin, said fibers being arranged in one direction on one of the surfaces of said support sheet and attached to the surface with an adhesive layer, wherein the reinforcing fibers include rigid first reinforcing fibers and tough second reinforcing fibers. ### Claim 10 (depends on 9) A reinforcing fiber sheet according to claim 9, wherein the first reinforcing fibers have a modulus of elasticity of 5 ton/mm.sup.2 or above, and the second reinforcing fibers have an elongation at rupture of 1.2% or above which is higher than the elongation at rupture of the first reinforcing fibers by 20% or above. ### Claim 11 A reinforcing fiber sheet comprising: (a) a support sheet; and (b) reinforcing fibers which have not yet been impregnated with a matrix resin, said fibers being arranged in one direction on both surfaces of the support sheet and attached to the surfaces with adhesive layers. ### Claim 12 (depends on 11) A reinforcing fiber sheet according to claim 11, wherein the support sheet is resin-penetrable. ### Claim 13 (depends on 12) A reinforcing fiber sheet according to claim 12, wherein the support sheet comprises a glass cloth having a thickness of 100 .mu.m or less. ### Claim 14 (depends on 13) A reinforcing fiber sheet according to claim 13, wherein the adhesive layer contains a curing accelerator for accelerating the setting of a room-temperature setting type matrix resin. ### Claim 15 (depends on 12) A reinforcing fiber sheet according to claim 12, wherein the adhesive layer contains a curing accelerator for accelerating the setting of a room-temperature setting type matrix resin. ### Claim 16 (depends on 11) A reinforcing fiber sheet according to claim 11, wherein the adhesive layer contains a curing accelerator for accelerating the setting of a room-temperature setting type matrix resin. ### Claim 17 (depends on 16) A reinforcing fiber sheet according to claim 16, wherein the matrix resin comprises an unsaturated polyester resin in which a peroxide type setting agent is present, the adhesive layer comprises an epoxy resin, and the curing accelerator comprises a cobalt type curing accelerator. ### Claim 18 (depends on 15) A reinforcing fiber sheet according to claim 15, wherein the matrix resin comprises an unsaturated polyester resin in which a peroxide type setting agent is present, the adhesive layer comprises an epoxy resin, and the curing accelerator comprises a cobalt type curing accelerator. ### Claim 19 (depends on 14) A reinforcing fiber sheet according to claim 14, wherein the matrix resin comprises an unsaturated polyester resin in which a peroxide type setting agent is present, the adhesive layer comprises an epoxy resin, and the curing accelerator comprises a cobalt type curing accelerator. ### Claim 20 (depends on 11) A reinforcing fiber sheet according to claim 11, wherein the reinforcing fibers arranged in one direction of the surfaces of the support sheet are rigid first reinforcing fibers, and the reinforcing fibers arranged on the other surface of the support sheet are tough second reinforcing fibers. ### Claim 21 (depends on 20) A reinforcing fiber sheet according to claim 20, wherein the first reinforcing fibers have a modulus of elasticity of 5 ton/mm.sup.2 or above, and the second reinforcing fibers have an elongation at rupture of 1.2% or above which is higher than the elongation at rupture of the first reinforcing fibers by 20% or above. ### Claim 22 A method of manufacturing a reinforcing fiber sheet having reinforcing fibers on a resin-penetrable support sheet, said method comprising the steps of: (a) arranging bundles of the reinforcing fibers in one direction on at least one surface of the support sheet in parallel apart from each other or close to each other, said surface of the support sheet being coated with an adhesive layer, and (b) pressing the bundles against the support sheet whereby the reinforcing fibers are adhered through the adhesive layer to the support sheet in one direction in a slightly unfastened state to thereby produce the reinforcing fiber sheet.