Enhanced polyester copolymer fiber

Details Enhanced polyester copolymer fiber Enhanced polyester copolymer fiber

1990-07-20

1992-02-25

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528300, 5283082, 5283086, 528502, 528503, 525437, 525449, 2642106, C08G 6320

Patent

active

050915045

ABSTRACT:
The invention is a method of producing a polyester filament which has a superior combination of tensile, dyeability and shrinkage properties. The method comprises forming a polyester-polyethylene glycol copolymer from a mixture consisting essentially of a terephthalic acid or dimethyl terephthalate, ethylene glycol, and polyethylene glycol, with the polyethylene glycol having an average molecular weight of between about 200 and 1500 grams per mole and being added in an amount sufficient to produce a polyester-polyethylene glycol copolymer in which the polyethylene glycol is present in an amount of between about 1.0 and 4 percent by weight of the copolymer formed; forming filament from the copolymer drawing the copolymer filament; and heat setting the drawn filament. The invention also comprises the enhanced fiber formed by the process.

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patent: 4704329 (1987-11-01), Hancock et al.
patent: 4745142 (1988-05-01), Ohwaki et al.

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