| abstract |
Fibre-reinforced material made from a web-shaped textile material and a thermosetting resin, having a fibre content of 30-70 wt.% and in which the fibres present are at least 30% synthetic fibres. Pref. the textile material may be e.g. a woven, non-woven or knitted fabric and pref. comprises a staple fibre yarn. The textile material consists of up to 100% synthetic fibres, esp. high strength polyacrylonitrile fibres. The thermosetting resin is pref. a phenolic resin, esp. a phenol-formaldehye condensate with a mol. ratio phenol:formaldehyde of 1:1 ro 1:2, and opt. contains substances acting as plasticiser and adhesion promoter, esp. a polyvinyalcohol deriv., and partic. polyvinylbutyral. The thermosetting resin may also contain up to 25% of a fluoropolymer, esp. a fluoropolymer with a melt viscosity at 380 deg.C or 10 power 2 to 10 power 5 Pa.s and an average particle size of 0.5-10 micrometres. |