Polyester yarns produced by high speed melt-spinning processes

Details Polyester yarns produced by high speed melt-spinning processes Polyester yarns produced by high speed melt-spinning processes

1983-09-14

1988-05-10

Kendell, Lorraine T.

Stock material or miscellaneous articles

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

Rod, strand, filament or fiber

2641761, 2642108, 428373, D02G 300

Patent

active

047435046

ABSTRACT:
A spun polyester yarn containing ethylene terephthalate as the main or only recurring unit characterized by a percentage crystallinity (.beta..times.10.sup.2) of less than 20, a birefringence (.DELTA.n) of at least 50.times.10.sup.-3, a function A greater than 28 and a function B.gtoreq.16 where ##EQU1## and B=(A-100 .beta.) and wherein-IV is the intrinsic viscosity of the spun yarn, .DELTA.n is the birefringence of the spun yarn and (dpf) is the filament decitex of the spun yarn.

REFERENCES:
patent: 3771307 (1973-11-01), Petrille
patent: 3772872 (1973-11-01), Piazza et al.

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