Fibre reinforced thermoplastic composite material - comprising web with fibre concn. decreasing from core to surfaces, giving high flexural strength

摘要

Fibre-reinforced thermoplastic composite material comprises, as basic structrue, a web in which the concn. of the reinforcing fibre is continuously distributed across the width so that the concn. is very low near the surface, increases gradually to a max. in the central part of the web and then decreases gradually towards the opposite surface so that the concn. of the resin is at a max. at the surface to achieve a smooth surface. Composite material has superior mechanical strength (partic. flexural strength and good stamping props.) compared to prods. where the reinforcing fibres are uniformly distributed in the thermoplastic.