METHOD FOR PRODUCING A FLAT SEMI-FINISHED PRODUCT FROM FIBER COMPOSITE MATERIAL

摘要

The present invention relates to a method for producing a flat semi-finished product from fiber composite material that contains individual carbon fibers, carbon fiber bundles, or a mixture thereof in a defined anisotropic fiber orientation and at least one thermoplastic matrix material. The method is characterized in that the anisotropy of the carbon fibers is created in a carding process using the high orientability of admixed non-carbon textile fibers, at least some of the non-carbon textile fibers being thermoplastic, and the carbon fibers having been isolated from waste or used parts containing carbon fiber. The flat fibrous web which is produced by means of the carding process and which has a specific orientation of the carbon fibers in the longitudinal direction is compressed into a sheet material in at least one subsequent step under the effect of heat. The method according to the invention enables the use of carbon fibers, for example from textile production waste, adhered or cured production waste, from processed CFRP waste components or the like, as reinforcing fibers, whereby a less expensive raw material is provided and the carbon fibers, carbon fiber bundles, or mixture thereof that are contained in said waste materials are recycled for a useful application.