Unstreteched polyethylene terephthalate yarn in continuous stret

Details Unstreteched polyethylene terephthalate yarn in continuous stret Unstreteched polyethylene terephthalate yarn in continuous stret

1973-03-05

1976-02-24

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

Elements

57157TS, D02G 102

Patent

active

039396371

ABSTRACT:
In known stretching and false twist texturizing processes for the manufacture of bulked yarn filaments of polyethylene terephthalate or of copolyesters of polyethylene terephthalate containing a preponderant proportion of polyethylene terephthalate structural units which are unstretched but have a degree of preorientation characterized by a natural stretching ratio of from about 1 : 2.7 to about 1 : 1.1 are used. The bulky yarns obtained do not have the high numbers of broken filaments and slubs hitherto observed and are distinguished by a uniformity of titer and an improved uniform dyeability.

REFERENCES:
patent: 3435603 (1969-04-01), Rice
patent: 3601972 (1971-08-01), Rogers et al.
patent: 3708970 (1973-01-01), MacFarlane

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