Hybrid yarn with polyamide and reinforcing fibres - has 5-20 micron polyamide filaments to give greater strength fabrics and consolidated composites

摘要

A hybrid yarn has polyamide fibres with a filament dia. between 5 and 20 microns which are mixed with reinforcing fibres. The reinforcing fibres can be glass or C fibres. The yarn can be wrapped with a polyamide yarn. Also claimed are fabrics and consolidated composites using the hybrid yarn. Pref. four 1400 dtex polyamide yarns with 480 filaments (filaments 2.9 dtex. diameter 18.2 microns) and a 7200 dtex C fibre yarn with 12000 filaments (filaments 0.67 dtex. dia. 6.9 micorns) are taken over an air spreader and combined over two guides. The hybrid yarn is wrapped with a 6 tex polyamide with 12 filaments and treated with 0.6 size. A test piece is wound and pressed at 260 deg.C. The tensile strength is 47.0 MPa compared with the value of 27.4 MPa obtained when using conventional polaymide with 8.2 dtex filaments. USE/ADVANTAGE - Very fine polyamide fibres are used for improved composites for sports equipment, partic. tennis racquet frames.