Polyolefin products and methods of making

Details Polyolefin products and methods of making Polyolefin products and methods of making

1982-07-01

1984-02-14

Watkins, Donald

Textiles: spinning, twisting, and twining

Strand structure

Multifilament yarns

57282, 57288, 264176F, 428364, D01D 522, D02G 300

Patent

active

044308523

ABSTRACT:
A process for making filament yarn products is disclosed in which polypropylene, having a molecular weight distribution of less than about 7 and a melt index between about 20 and about 60 is melt spun to produce an as-spun product or additionally interlaced before take-up, twist-drawn, heat set, draw-textured by false-twisting, simultaneously draw-textured, sequentially draw-textured, draw-twisted, draw-Taslan textured, stuffer box crimped and cut into staple fibers, or a plurality of yarns are simultaneously draw-textured by false-twisting while reversing the direction of twist of alternate yarns and thereafter interlacing. Products of improved tenacity, improved birefringence and low elongation are produced.

REFERENCES:
patent: 3025689 (1962-03-01), Beghelli
patent: 3233023 (1966-02-01), Benson
patent: 3262257 (1966-07-01), Martin
patent: 3323190 (1967-06-01), Boltniew
patent: 3705227 (1972-12-01), Fintel et al.
patent: 3752457 (1973-08-01), Parmeggiani et al.

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