Poly (1,4-cyclohexanedimethylene terephthalate) multifilament ya

Details Poly (1,4-cyclohexanedimethylene terephthalate) multifilament ya Poly (1,4-cyclohexanedimethylene terephthalate) multifilament ya

1994-11-29

1996-05-21

Edwards, N.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

428395, 528307, D02G 300

Patent

active

055188133

ABSTRACT:
A high hydrolysis and aminolysis resistance multifilament yarn composed of a polymer based on poly(1,4-cyclohexanedimethylene terephthalate), wherein at least 85 mol % of the diol-derived groups of the polyester are 1,4-cyclohexanedimethylene groups, characterized by a tenacity of above 40 cN/tex, a dry heat shrinkage S.sub.200 of below 10% and a post hydrolysis or aminolysis treatment strength of at least 85% of the original strength. A process for producing this multifilament yarn comprises maintaining the temperature of the melt at from 295.degree. to 305.degree. C., taking off the filaments at a spinning take-off speed of below 1500 m/min, drawing the spun filaments continuously or batchwise in at least two stages using a defined draw ratio and defined temperatures in every stage, and subjecting the drawn filaments to a setting and relaxing treatment at temperatures above 230.degree. C.

REFERENCES:
patent: 3669933 (1972-06-01), King et al.
patent: 3669935 (1972-06-01), King et al.
patent: 3670489 (1972-06-01), Jackson, Jr. et al.
patent: 3671495 (1972-06-01), King et al.
patent: 5169499 (1992-08-01), Eagles et al.
Martin & Busch, Angewnadte Chemie 74 (1962), S. 624-628.
"Therman and Hydrolytic Stability of Kodel Polyester Fiber" (Eastman Testile fibers (1974)).

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