Polyester copolymer fiber having enhanced strength and dyeabilit

Details Polyester copolymer fiber having enhanced strength and dyeabilit Polyester copolymer fiber having enhanced strength and dyeabilit

1993-03-24

1993-12-21

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

524600, 528271, 528274, 5282953, 528300, 528302, 528308, 428224, C08G 6302, C08G 6316

Patent

active

052722465

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 copolymer from a mixture consisting essentially of terephthalic acid (TA) or dimethyl terephthalate (DMT), ethylene glycol, adipic acid, and pentaerythritol wherein the adipic acid is added in an amount of between 1.3 and 3.2 weight percent of the terephthalic acid and pentaerythritol is added in the amount from 175 to 700 ppm by weight of terephthalic acid; forming the 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 having an atmospheric dyeability greater than that of an unenhanced PET produced under identical conditions except for the addition of the adipic acid and pentaerythritol, a modulus of greater than 3.0 g/denier, a tenacity from about 5 to 7 g/denier and a hot air shrinkage of less than 10%.

REFERENCES:
patent: 3932356 (1976-01-01), Takagi
patent: 3960817 (1976-06-01), Morawetz et al.
patent: 4113704 (1978-09-01), MacLean et al.
patent: 4248997 (1981-02-01), Ihida

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