Method of manufacturing a high-strength, polyurethane-impregnate

Details Method of manufacturing a high-strength, polyurethane-impregnate Method of manufacturing a high-strength, polyurethane-impregnate

1977-04-25

1978-06-20

Smith, Ronald H.

Textiles: spinning, twisting, and twining

Apparatus and processes

Elements

57157TS, D02G 340

Patent

active

040954048

ABSTRACT:
A high-strength, low weight, electromechanical cable is manufactured from aromatic polyamide multifilament yarns impregnated with a hydrolytically stable polyurethane resin to form a protective coating. The coating provides load adjustment from fiber to fiber, eliminates abrasive self-destruction of the fibers during flexing of the yarn under load, protects the fiber to some extent from ultraviolet radiation, aggressive chemicals or abrasive particles and makes it possible to preform the yarn. The coating comprises a reaction product of a liquid tetramethylene glycol, an aliphatic/cycloaliphatic diisocyanate and a diamine coupling-curing agent. The impregnated yarns are dried, twisted together, heated above the softening point of the resin to fuse the coatings of adjacent yarns, and then cooled to form a set twisted helix of the yarns.

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patent: 3960050 (1976-06-01), Eisler
Saunders, et al., Polyurethanes, Part II, Interscience, New York, 1964, p. 532.

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