Process for spinning polyurethane-hard polymer conjugate yarn

Details Process for spinning polyurethane-hard polymer conjugate yarn Process for spinning polyurethane-hard polymer conjugate yarn

1974-06-24

1976-10-19

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Layered, stratified traversely of length, or multiphase...

260 775SP, 264210F, 428373, B29F 310, D02G 302

Patent

active

039871410

ABSTRACT:
Drawing performance of a conjugated elastomeric polyurethane-hard polymer yarn is improved by critical stoichiometry in preparation of the polyurethane polymer, which is made by reacting together a high molecular weight diol, a low molecular weight diol, and a diisocyanate so that the resulting polyurethane contains between 1 and 45 (preferably between 1 and 27) microequivalents of free isocyanate groups per gram of polymer at the time of melt spinning.

REFERENCES:
patent: 3174949 (1965-03-01), Harper
patent: 3233025 (1966-02-01), Frye et al.
patent: 3357954 (1967-12-01), Kirkaldy
patent: 3642964 (1972-02-01), Rausch et al.
patent: 3668185 (1972-06-01), Boutsicaris
patent: 3761348 (1973-09-01), Chamberlin
patent: 3839284 (1974-10-01), Mohajer

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