Poly(trimethylene terephthalate) yarn

Details Poly(trimethylene terephthalate) yarn Poly(trimethylene terephthalate) yarn

D - Textiles, Paper

01

F

D01F 6/62 (2006.01) D01D 5/253 (2006.01)

Patent

CA 2372428

A process for spinning a direct-use yarn, comprising extruding a polyester polymer through a spinneret to form non-round filaments at a spinning speed less than 4500 mpm and a temperature between about 255 °C and about 275 °C, wherein said polymer comprises at least 85 mole % poly(trimethylene terephthalate) wherein at least 85 mole % of repeating units consist of trimethylene units, and wherein said polymer has an intrinsic viscosity of at least 0.70 dl/g, the direct-use yarn and its use.

L'invention concerne un processus de filature d'un fil à usage direct consistant à extruder un polymère polyester dans une buse à filer, en vue de former des filaments non circulaires, à une vitesse de filature inférieure à 4500 mpm et à une température comprise entre environ 255 DEG C et environ 275 DEG C, le polymère comprenant au moins 85 moles % de poly(triméthylène téréphthalate), au moins 85 moles % de ces unités qui se répètent représentant des unités triméthylène, et le polymère ayant une viscosité intrinsèque d'au moins 0.70 dl/g. L'invention concerne également le fil à usage direct et l'utilisation associée.

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