Title:
POLY(TRIMETHYLENE) TEREPHTHALATE TEXTILE STAPLE PRODUCTION
Document Type and Number:
WIPO Patent Application WO2001068962
Kind Code:
A3
Abstract:
A process for making textile staple fibre from polytrimethylene terephthalate (PTT) which comprises: (a) melt extruding PTT polymer at 245 to 253 DEG C, (b) spinning the extruded PTT into yarn using at least one spinneret, (c) moving the spun yarn to a first takeup roll wherein the distance from the spinneret to the roll is from 16 to 20 feet, (d) cooling the spun yarn to less than 31 DEG C before it reaches the roll, (e) prior to the draw process, preconditioning the yarn under tension at a temperature of at least 60 DEG C, (f) drawing the yarn at a temperature of at least 60 DEG C, (g) allowing the drawn yarn to relax at a temperature of up to 190 DEG C, and (h) crimping the drawn yarn at a temperature of 70 to 120 DEG C, and decreasing the drawn yarn feed denier into the crimper by 10 to 60 percent by denier.
Inventors:
CASEY PAUL KAROL (US)
DANGAYACH KAILASH (US)
OLIVERI LINDA HARVEY (US)
SHIFFLER DONALD ALBERT (US)
DANGAYACH KAILASH (US)
OLIVERI LINDA HARVEY (US)
SHIFFLER DONALD ALBERT (US)
Application Number:
PCT/US2001/008230
Publication Date:
January 31, 2002
Filing Date:
March 15, 2001
Export Citation:
Assignee:
SHELL OIL CO (US)
CASEY PAUL KAROL (US)
DANGAYACH KAILASH (US)
OLIVERI LINDA HARVEY (US)
SHIFFLER DONALD ALBERT (US)
CASEY PAUL KAROL (US)
DANGAYACH KAILASH (US)
OLIVERI LINDA HARVEY (US)
SHIFFLER DONALD ALBERT (US)
International Classes:
D01F6/62; D02G1/12; D03D15/00; (IPC1-7): D01F6/62
Foreign References:
| EP0745711A1 | 1996-12-04 | |||
| EP0949363A2 | 1999-10-13 | |||
| US5645782A | 1997-07-08 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 06 22 September 2000 (2000-09-22)
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