Title:
DEEPLY DYEABLE POLYESTER FIBER AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JPS5854019
Kind Code:
A
Abstract:
PURPOSE: A polyester containing SO3M groups is melt spun, heat treated and drawn under specific conditions to produce deeply dyeable polyester fiber with a combination of high dyeability and soft touch.
CONSTITUTION: A polyester containing ethylene terephthalate as the major recurring units as well a -SO3M groups (M is alkali metal) is melt spun to give an undrawn yarn with an orientation degree (Δn) of 0.02W0.08. The undrawn yarn is heat-treated under relax until the crystallinity (xρ) becomes 30W55% and the crystallized fiber is drawn at low temperatures so that the finess increases at a rate of +0.1W1.7 times to give the objective fiber with xρ of 30W55%, Δn of 0.06W0.12 and xρ/Δn of 350W550. The above -SO3M is preferably -SO3Na.
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Inventors:
SASAKI YOSHIYUKI
TANI MASAYUKI
OKAMOTO TETSUO
TANI MASAYUKI
OKAMOTO TETSUO
Application Number:
JP14542281A
Publication Date:
March 30, 1983
Filing Date:
September 17, 1981
Export Citation:
Assignee:
TEIJIN LTD
International Classes:
D01F6/84; D01F6/62; (IPC1-7): D01F6/62
Domestic Patent References:
| JPS575916A | 1982-01-12 | |||
| JPS57199814A | 1982-12-07 | |||
| JPS53147814A | 1978-12-22 | |||
| JPS53143728A | 1978-12-14 |
Attorney, Agent or Firm:
Maeda Junhiro