Method of producing an enhanced polyester copolymer fiber

Details Method of producing an enhanced polyester copolymer fiber Method of producing an enhanced polyester copolymer fiber

1988-12-09

1990-12-04

Lorin, Hubert C.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2642108, 264211, 264234, 264345, 5283087, D01F 678

Patent

active

049752332

ABSTRACT:
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.

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