False twist-crimped polyester yarns production

Details False twist-crimped polyester yarns production False twist-crimped polyester yarns production

1973-12-19

1976-02-10

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

Elements

57140R, D02G 102

Patent

active

039369994

ABSTRACT:
A false twist-crimped polyester yarn having a density (d) of 1.3800.ltoreq.d.ltoreq.1.3970 (g/cm.sup.3) and total percentage crimp (TC) of TC 30% is produced by false twisting a polyester multi-filament having a birefringence (.DELTA.n) of 0.030.ltoreq..DELTA.n.ltoreq.0.145 while heat setting the filament in the twisted state at 160.degree. to 210.degree. at a draft (dr) which satisfies the following equation:

REFERENCES:
patent: 2980492 (1961-04-01), Jamieson et al.
patent: 3458986 (1969-08-01), Allison et al.
patent: 3534541 (1970-10-01), Edison
patent: 3587220 (1971-06-01), Eggleston
patent: 3601972 (1971-08-01), Rogers
patent: 3797221 (1974-03-01), Ikeda et al.

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