Polyester fiber having excellent thermal dimensional...

Details Polyester fiber having excellent thermal dimensional... Polyester fiber having excellent thermal dimensional...

D - Textiles, Paper

01

F

18/182, 18/624

D01F 6/62 (2006.01) D01D 5/08 (2006.01)

Patent

CA 1191009

Abstract: The invention provides a polyester fiber having good thermal dimensional stability and chemical stability as well as high tenacity, which is a drawn yarn produced by melt-spinning a polyester comprising predominantly poly- ethylene terephthalate, solidifying the spun yarn and then drawing the yarn under specified conditions. The yarn has specific properties such as intrinsic viscosity, diethylene glycol content, carboxyl group content, average birefringence, yarn tenacity and difference of average birefringence between the surface and center of the monofilament, and further low dry heat shrink and work loss when heat-treated. The poly- ester fiber is useful as a reinforcement for rubber goods, specifically as a tire cord. The invention also provides processes for the production of the polyester fiber.

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