04526738 is referenced by 16 patents and cites 6 patents.

A polyester fiber having a tenacity of at least 4.0 g/d is formed from a copolyester having a degree of polymerization of from 80 to 100 of which copolyester 1.0 to 2.0 mol % of its acid component has a metal sulfoisophthalic group and 0.5 to 1.9 weight % of which copolyester is provided by a glycol component provided by glycol having a molecular weight of from 400 to 6000. The polyester fiber is readily dyed with basic dyes.

The polyester fiber can be prepared by spinning the copolyester at a shear rate of.ltoreq.10.sup.4 sec.sup.-1, a spinning draft ratio of .ltoreq.250, a back pressure of the spinneret of.gtoreq.40 kg/cm.sup.2 and a shear stress of .ltoreq.(Q+0.7).times.10.sup.7 dyne/cm.sup.2, where Q is the mass output rate per single hole (g/min).

Title
Polyester fiber and method for the production thereof
Application Number
6/512206
Publication Number
4526738
Application Date
July 8, 1983
Publication Date
July 2, 1985
Inventor
Keizo Sano
Musashino
JP
Tadayuki Matsumoto
Otu
JP
Takehiko Miyoshi
Mishima
JP
Agent
Austin R Miller
Assignee
Toray
JP
IPC
B28B 3/20
C08G 63/70
D01D 11/06
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