Title:
DIMENSIONALLY STABLE POLYESTER YARN FOR HIGHLY DIMENSIONALLY STABLE TREATED CORDS
Document Type and Number:
WIPO Patent Application WO1990004667
Kind Code:
A1
Abstract:
Polyethylene terephthalate yarn is prepared by spinning under very high-stress conditions wherein oriented-crystalline undrawn yarns are obtained. Selection of process parameters yields a partially oriented semicrystalline undrawn yarn with a crystallinity of 16 to 24 percent and a melting point elevation of 14 to 22C which is drawn to produce the resulting unique combination of properties: (A) a terminal modulus of at least 20 g/d, (B) a dimensional stability defined by E4.5? +FS < 11.5 percent, (C) a tenacity of at least 5 grams per denier, (D) a melting point elevation of 14 to 22C, preferably 17 to 20C, and (E) an amorphous orientation function of less than 0.75. The resulting treated tire cord unexpectedly provides high ultimate elongation and high toughness in combination with improved dimensional stability.
Inventors:
NELSON CHARLES JAY (US)
BHEDA JAYENDRA HIRALAL (US)
RIM PETER BRYAN (US)
TURNER JAMES MICHAEL (US)
BHEDA JAYENDRA HIRALAL (US)
RIM PETER BRYAN (US)
TURNER JAMES MICHAEL (US)
Application Number:
PCT/US1989/004036
Publication Date:
May 03, 1990
Filing Date:
September 15, 1989
Export Citation:
Assignee:
ALLIED SIGNAL INC (US)
International Classes:
B60C9/00; D01F6/62; D02G3/48; (IPC1-7): D01F6/62; B60C9/00
Foreign References:
| EP0295147A2 | 1988-12-14 | |||
| EP0169415A2 | 1986-01-29 | |||
| EP0089912A2 | 1983-09-28 | |||
| US4491657A | 1985-01-01 | |||
| EP0209167A1 | 1987-01-21 |
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