Manufacture of synthetic fibers and yarns

Details Manufacture of synthetic fibers and yarns Manufacture of synthetic fibers and yarns

1972-11-10

1976-09-28

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Forming continuous work followed by cutting

264164, 264176R, 264210R, 264DIG47, B29H 718

Patent

active

039832023

ABSTRACT:
An improved process for the manufacture of fibers and yarns comprises drawing a sheet-like moss (web) of molecularly-orientable organic polymer at a temperature above its crystalline melting point, profiling said web followed by stretching and fibrillation of the web into filaments, the improvement comprising the intermediate step before stretching that the profiled polymer is chilled to a temperature below the crystalline melting point of the polymer and subjected to melt draw-down between the profiling element and movable chilling element.

REFERENCES:
patent: 2327087 (1943-08-01), Austin
patent: 3085292 (1963-04-01), Kindseth
patent: 3347727 (1967-10-01), Bobkowicz et al.
patent: 3414444 (1968-12-01), Bobkowicz et al.
patent: 3496044 (1970-02-01), Rowland
patent: 3500627 (1970-03-01), Kim
patent: 3548581 (1970-12-01), Bobkowicz et al.
patent: 3567545 (1971-03-01), Bobkowicz et al.
patent: 3608042 (1971-09-01), Rasmussen
patent: 3672013 (1972-06-01), Vernon et al.
patent: 3697636 (1972-10-01), Skoroszewski et al.

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