| 摘要 |
1,157,704. Core spun yarn. FARBENFABRIKEN BAYER A.G. 13 Oct., 1966 [15 Oct., 1965], No. 45842/66. Heading D1W. In the production of a core spun yarn having an elastomeric polyurethane filament as the core, the filament is stretched 3 to 8 times its length in a heating zone at a temperature between 100 and 300‹C immediately before the core-spinning. Natural or synthetic fibres for example of polyacrylonitrile - may be spun around the core filament. |
