Manufacture of synthetic fibres and yarns

Details Manufacture of synthetic fibres and yarns Manufacture of synthetic fibres and yarns

D - Textiles, Paper

01

D

18/547

D01D 1/00 (2006.01) B29C 43/22 (2006.01) B29C 43/46 (2006.01) B29C 47/00 (2006.01) B29C 55/02 (2006.01) B29C 55/06 (2006.01) B29C 69/02 (2006.01) D01D 5/42 (2006.01)

Patent

CA 1046722

ABSTRACT OF THE DISCLOSURE This invention relates to a process for the manufacture of synthetic fibres, which comprises passing a web of a molecularly-orientable organic polymer at a temperature below its crystalline melting point or a non-molten sheet-like mass of such polymer at a temperature above its crystalline melting point, under pressure contact through the nip formed between two contra-ro- tating rollers having non-yielding surfaces, at least one of said rollers having a plurality of closely spaced and parallel surface ridges extending circumferencially around the roller each having inwardly directed sides leading to a peak and the sides of adjacent ridges forming troughs, to yield a grooved, profiled web; chilling, where required, the profiled web during, after or both during and after contact with the rollers to a temperature below the crystal- line melting point of the polymer; stretching the profiled web to effect ori- entation thereof; and subjecting it during and/or after the stretching to con- ditions resulting in a controlled fibrillation thereof to form the synthetic fibres. This process is useful for the manufacture of synthetic fibres, par- ticularly those from polypropylene for which appreciable potential outlets have become apparent in recent years in the textile industry, for example for carpet manufacture.

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