Monofilament yarn and process for producing the same

D - Textiles – Paper – 01 – F

Patent

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D01F 6/62 (2006.01)

Patent

CA 2404345

A polytrimethylene terephthalate monofilament yarn which is excellent in flexibility, flex recovery, and durability in long-term use. It is characterized by being made of a polytrimethylene terephthalate comprising 90 mol% or more trimethylene terephthalate repeating units and 10 mol% or less repeating units of another ester and by having a single yarn fineness of 50 dtex or higher, an intrinsic viscosity of 0.8 to 1.3 dl/g, and a shrinkage in boiling water of 2% or lower.

L'invention porte sur un fil monofilament de polytriméthylène téréphtalate qui présente une excellente flexibilité, une excellente recouvrance élastique et une excellente durabilité sur une utilisation à long terme. Ce fil se caractérise en ce qu'il est fabriqué dans un polytriméthylène téréphtalate comprenant au moins 90 % en mole de motifs de répétitions de triméthylène téréphtalate et 10 % en mole maximum de motifs de répétition d'un autre ester, et en ce que la finesse d'un fil simple est égale ou supérieure à 50 dtex, sa viscosité intrinsèque est comprise entre 0,8 et 1,3 dl/g et qu'il présente un retrait à l'eau bouillante égal ou inférieur à 2 %.

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