Polyester fiber for industrial use and process for...

Details Polyester fiber for industrial use and process for... Polyester fiber for industrial use and process for...

D - Textiles, Paper

01

F

18/622

D01F 6/62 (2006.01) D01D 5/084 (2006.01)

Patent

CA 1327685

POLYESTER FIBER FOR INDUSTRIAL USE AND PROCESS FOR PREPARATION THEREOF ABSTRACT OF THE DISCLOSURE Disclosed is a polyethylene terephthalate untwisted multifilament which satisfies the following requirements (A), (B), (C) and (D); (A) the intrinsic viscosity [IV] is 0.97 to 1.15; (B) the amorphous orientation function [fa] is not larger than 0.55; (C) the tenacity [T] (g/d), the shrinkage [.DELTA.S] (%) as measured after standing in dry air at 150°C for 30 minutes, the medium elongation [ME] (%) under a load of 4.5 g/d, and the dimensional stability index [y] expressed by the formula: Y= ME0-81 + .DELTA.S + 1.32 are within ranges defined by the following formulae (a), (b), (c), (d) and (e): 0.33Y + 5.55 ? T ? 0.33Y + 6.50 (a), 8.0 ? T ? 9.5 (b), 8.5 ? Y ? 10.5 (c), 5 ? ME ? 10 (d), and 2 ? .DELTA.S ? 6 (e); and (d) the elongation at break is at least 11% and the product of the tenacity and elongation, which is defined by: Image , is 30 to 36.

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