METHOD OF PRODUCING A THICK, THERMOFORMABLE, FIBER-REINFORCED SEMI-FINISHED PRODUCT

摘要

Thermoplastic and non-bound synthetic reinforcing fibers, 20-80mm long are continuously laid down by an air lay-up or carding method to produce a fleece which is then needled. The fleece is heated to above the softening point of the thermoplastic fibers either in an air circulation oven or by infra-red radiation. Consolidation of the fleece into a glass mat reinforced thermoplastic sheet (GMT) is effected on either a laminating machine, a polishing stack or a calender. Functional layers are simultaneously or subsequently pressed onto the sheet.