# US 2014/0193625 A1 · Method for producing a component from a composite fiber material and composite fiber material component > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0193625 A1 - Document ID: US20140193625A1 - Status: Published application - Kind: A1 - Application number: 14/127,539 - Filed: 2012-07-12 - Published: 2014-07-10 - Earliest claimed: 2011-07-13 - Assignees: Technische Universität München - Inventors: Daniel Häffelin; Swen Zaremba; Bernd Zacherle - Web page: https://patentgrep.com/patent/US20140193625A1 ## CPC - B32B 7/022: Mechanical properties - 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 71/02: Thermal after-treatment {(B29C71/0063 and B29C71/0072 take precedence)} - B32B 37/04: characterised by the partial melting of at least one layer - B29C 2071/022: {Annealing} - Y10T 428/24983: Hardness - 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) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A process for the production of a component (1) made of a fiber composite material, and also a component (1) produced in this way, are stated, where a foil composite (7) with a thermoplastic outer foil (6) and with a thermoplastic inner foil (5) is produced, where the modulus of elasticity (E) of the inner foil (5) within a temperature range is smaller than the modulus of elasticity (E) of the outer foil (6), the inner foil (5) of the foil composite (7) is bonded to a molding (4) comprising a fiber material (2) and comprising a thermoset (3), the molding (4) is hardened, and the foil composite (7) is subjected to a heat treatment in the temperature range within which the modulus of elasticity (E) of the inner foil (5) is smaller than the modulus of elasticity (E) of the outer foil (6), where the outer foil (6) undergoes stress relaxation. ## Claims ### Claim 1 A process for the production of a component (1) made of a fiber composite material, where a foil composite (7) with a thermoplastic outer foil (6) and with a thermoplastic inner foil (5) is produced, where the modulus of elasticity (E) of the inner foil (5) within a temperature range is smaller than the modulus of elasticity (E) of the outer foil (6), the inner foil (5) of the foil composite (7) is bonded to a molding (4) comprising a fiber material (2) and comprising a thermoset (3), the molding (4) is hardened, and the foil composite (7) is subjected to a heat treatment in the temperature range within which the modulus of elasticity (E) of the inner foil (5) is smaller than the modulus of elasticity (E) of the outer foil (6), where the outer foil (6) undergoes stress relaxation. ### Claim 2 (depends on 1) The process as claimed in claim 1, where the foil composite (7) is produced with a thermoplastic outer foil (6) and with a thermoplastic inner foil (5), where the softening point (Tg,6) of the inner foil (5) is lower than the softening point (Tg,6) of the outer foil (6), and where the foil composite (7) is subjected to a heat treatment at a temperature between the two softening points (Tg,6, Tg,6), where the inner foil (5) undergoes stress relaxation due to softening. ### Claim 3 (depends on 1) The process as claimed in claim 1, where the molding (7) is subjected to a forming process before the heat treatment for the stress relaxation of the outer foil (5). ### Claim 4 (depends on 1) The process as claimed in claim 1, where the foil composite (7) is bonded to the molding (4) by laying the inner foil (5) of the foil composite (7) on a dry fiber material (2) and using a heat treatment to soften the inner foil (5), where material of the softened inner foil (5) penetrates into the fiber material (2), and then the thermoset (3) is introduced in the form of liquid with saturation of the fiber material (2). ### Claim 5 (depends on 1) The process as claimed in claim 1, where the foil composite (7) is bonded to the molding (4) by laying the inner foil (5) of the foil composite (7) on a dry fiber material (2), then the thermoset (3) is introduced in the form of liquid with saturation of the fiber material (2), and then a heat treatment is used to soften the inner foil (5), where material of the softened inner foil (5) penetrates into the fiber material (2) and/or forms an adhesive boundary region with the thermoset (3). ### Claim 6 (depends on 4) The process as claimed in claim 4, where the thermoset (3) is introduced by means of a pressure difference. ### Claim 7 (depends on 4) The process as claimed in claim 4, where the introduction of the thermoset (3), the forming process and the hardening take place in an RTM process in combination at approximately the same time in a compression step. ### Claim 8 (depends on 1) The process as claimed in claim 1, where the foil composite (7) is produced by coextrusion of the outer foil (6) and the inner foil (5). ### Claim 9 (depends on 1) The process as claimed in claim 1, where fiber material (2) used comprises a laid fiber scrim, a woven fiber fabric, a knitted fiber fabric, a fiber paper, and/or a nonwoven fiber fabric. ### Claim 10 (depends on 1) The process as claimed in claim 1, where fibers used comprise glass fibers, carbon fibers, natural fibers, thermoplastic synthetic fibers, and/or aramid fibers. ### Claim 11 (depends on 1) The process as claimed in claim 1, where outer foil (6) used comprises a plastic selected from the group consisting of PMMA, PC, SAN, ASA, ABS, PVF, and PVC, or a combination thereof. ### Claim 12 (depends on 1) The process as claimed in claim 1, where inner foil (5) used comprises a plastic selected from the group consisting of ABS, EVA, PCB, APAO, TPE-U, TPE-E, TPE-A, EVOH, and PE, or a combination thereof. ### Claim 13 A component (1) made of a fiber composite material comprising a fiber material (2) bonded in a matrix made of a thermoset (3), and also comprising a surface layer made of a foil composite (2) with a thermoplastic outer foil (6) and with a thermoplastic inner foil (5), where the modulus of elasticity (E) of the inner foil (5) within a temperature range is smaller than the modulus of elasticity (E) of the outer foil (6), where the inner foil (5) has been bonded directly to the thermoset (3) and/or to the fiber material (2), and where the outer foil (6) has undergone stress relaxation. ### Claim 14 (depends on 13) The component (1) as claimed in claim 13, where the softening point (Tg,6) of the inner foil (5) is lower than the softening point (Tg,6) of the outer foil (6). ### Claim 15 (depends on 5) The process as claimed in claim 5, where the thermoset (3) is introduced by means of a pressure difference. ### Claim 16 (depends on 5) The process as claimed in claim 5, where the introduction of the thermoset (3), the forming process and the hardening take place in an RTM process in combination at approximately the same time in a compression step. ### Claim 17 (depends on 1) A component produced using the process of claim 1.