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Patent Searching and Data


Title:
MIXED POLYESTER BASED BINDER FIBER
Document Type and Number:
Japanese Patent JPS59223312
Kind Code:
A
Abstract:

PURPOSE: The titled fibers, consisting of polyethylene terephthalate and polybutylene terephthalate, having specific values of specified physical properties, e.g. fiber strength, and capable of giving stable steps and nonwoven fabrics having improved heat resistance, strength and feeling, etc.

CONSTITUTION: Mixed polyester based binder fiber, consisting of (A) 40W80wt% polyethylene terephthalate and (B) 60W20wt% polybutylene terephthalate, having ≥1.5g/denier fiber strength, ≤250% fiber elongation, ≤5% shrinkage in hot air at 140W180°C, capable of increasing the birefringence thereof by ≥20×10-3 by heat treatment in the hot air, and having ≥100×10-3 birefringence after the increase and ≤25% yarn shrinkage when a fiber bundle having about 1000 yarn denier and 1m length is passed through and calendered with a pair of flat rolls set under 10kg/cm linear pressure and at 140W180°C at 5m/min speed.


Inventors:
Asano, Masaji
Okada, Hiromasa
Noguchi, Yoshishige
Akiyama, Shoji
Application Number:
JP1983000095940
Publication Date:
December 15, 1984
Filing Date:
May 30, 1983
Export Citation:
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Assignee:
KURARAY CO LTD
International Classes:
D01F6/92; D04H1/54; D04H1/55; (IPC1-7): D01F6/92