METHOD FOR PRODUCING A STRUCTURED GRAINED SURFACE ON A FIBER-REINFORCED THERMOPLASTIC CONTAINING TEXTILE CONTINUOUS FIBER REINFORCEMENTS

• Main Authors: DIEHLMANN, Tim, SCHNEIDER, Ulrich, RADTKE, Andreas, JAKOBI, Reinhard
• Format: Patent
• Language: English; French; German
• Published: 08.09.2021
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The present invention relates to a process for the production of a structured grain on the surface of a thermoplastic having continuous-fiber reinforcement by a textile sheet, where a mixture of at least one fiber material and of at least one thermoplastic is heated and pressed in a mold to a temperature above the softening point of the thermoplastic, where a structured grain has been applied on the internal side of the mold. The at least one fiber material comprises continuous fibers and takes the form of a regularly arranged textile sheet. The textile sheet and the structured grain on the internal side of the mold are oriented in relation to one another in a manner such that during the pressing procedure the textile sheet and the structured grain on the internal side of the mold are mutually superposed. After the pressing procedure, the mixture of the at least one fiber material and the at least one thermoplastic in the mold is cooled to a temperature below the softening point of the thermoplastic, with formation of the structured grain on the surface of the thermoplastic. The present invention further relates to a thermoplastic which has continuous-fiber reinforcement by a textile sheet and has a structured grain on the surface, and is obtained by the process of the invention.