Method for drawing polyurethane filaments

Details Method for drawing polyurethane filaments Method for drawing polyurethane filaments

1974-05-22

1977-01-11

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264210F, 264235, 264290R, D01D 506, D01D 512

Patent

active

040027112

ABSTRACT:
In the method of this invention a substantially linear polyurethane filament is elongated a number of times its original length and heated at a temperature above its "fiber stick temperature" for a sufficient time so that the filament permanently retains that elongation and does not recover any substantial amount of the length to which it has been elongated.

REFERENCES:
patent: 2746839 (1956-05-01), Terry et al.
patent: 3342028 (1967-09-01), Matsubayashi et al.
patent: 3357076 (1967-12-01), Greenwald et al.
patent: 3387448 (1968-06-01), Lathem et al.
patent: 3441639 (1969-04-01), Killen et al.
patent: 3476850 (1969-11-01), Matsubayashi et al.
patent: 3679631 (1972-07-01), Mayes
patent: 3679633 (1972-07-01), Matsubayashi et al.
patent: 3699205 (1972-10-01), Peters

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