Title:
PRODUCTION OF CATIONIC DYE-DYEABLE AND SPONTANEOSULY STRETCHABLE POLYESTER FILAMENT AND PRODUCTION OF CLOTH FROM FILAMENT PRODUCED THEREBY
Document Type and Number:
Japanese Patent JP3128529
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To stably obtain the subject filament yarn that is cationic dye-dyeable and reveals spontaneous stretchability in the following process by extruding a polyethylene terephthalate containing 5-sodio-sulfoisophthalic acid into fiber under specific conditions.
SOLUTION: A polyester copolymer that comprises ethylene terephthalate as main recurring units and 1.5-3.5mol% of 5-sodiosulfoisophthalic acid as a copolymerization component is melt-extruded into high-orientation undrawn yarn with an optical birefringence (Δn) of 35×10-3-55×10-3 and a boiling water shrinkage of ≥40%. The undrawn yarn is drawn at a draw ratio of 0.4M-0.5M (M is the maximum draw ratio measured at preheating temperature of 85-90°C and M>2.5) to form thick and thin filament yarn, then drawn at a draw ratio of ≤1.1 where the surface temperature (HR2) of the take-up roller in the drawing zone is Tg+10°C or higher and does not exceed the surface temperature of the take-up roller in the first drawing roller). Further, the drawn yarn is thermally relaxed more than 10% (at H2+50°C or higher).
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Inventors:
Yukiko Sayama
Hideo Sakakura
Yoshinori Kawashima
Hideo Sakakura
Yoshinori Kawashima
Application Number:
JP5008697A
Publication Date:
January 29, 2001
Filing Date:
March 05, 1997
Export Citation:
Assignee:
Mitsubishi Rayon Co., Ltd.
International Classes:
D01F6/84; D02J1/22; D03D15/567; (IPC1-7): D02J1/22; D01F6/84; D03D15/00; D03D15/04