Title:
META-TYPE FULLY AROMATIC POLYAMIDE FIBER HAVING EXCELLENT HIGH-TEMPERATURE PROCESSABILITY AND METHOD FOR PRODUCTION THEREOF
Document Type and Number:
WIPO Patent Application WO/2007/089008
Kind Code:
A1
Abstract:
[PROBLEMS] To provide a novel meta-type fully aromatic polyamide fiber which
can prevent the tinting or discoloration of a product and also prevent the generation
of any harmful or organic gas even during the processing or use under high temperature
conditions. [MEANS FOR SOLVING PROBLEMS] Disclosed is a meta-type fully aromatic
polyamide fiber which has a residual solvent content of 1.0% or less, a dry-heat
shrinkage rate of 3% or less at 300˚C, and a fiber strength of 3.0 cN/dtex
or higher. The fiber can be produced by wet-spinning a polymer solution into a
fiber, wherein the polymer solution comprises a meta-type fully aromatic polyamide
mainly composed of a meta-phenylenediamine isophthalamide skeleton and an
amide solvent containing a salt. The method for production of the fiber comprises
the following steps (1) to (4): (1) ejecting the polymer solution into a coagulation
bath comprising an amide solvent and water and containing a low concentration
of a salt to coagulate the polymer solution in the form of a porous linear material
(i.e., a fibrous material); (2) stretching the porous linear material in a plastic
stretching bath comprising an aqueous solution of an amide solvent; (3) washing
the stretched material with water and subsequently thermally treating the washed
material in a saturated water vapor atmosphere; and (4) treating the resulting
material with dry heat.
Inventors:
TAKIUE KOTARO (JP)
FUJITA HIROSHI (JP)
FUJITA HIROSHI (JP)
Application Number:
PCT/JP2007/051880
Publication Date:
August 09, 2007
Filing Date:
January 30, 2007
Export Citation:
Assignee:
TEIJIN TECHNO PRODUCTS LTD (JP)
TAKIUE KOTARO (JP)
FUJITA HIROSHI (JP)
TAKIUE KOTARO (JP)
FUJITA HIROSHI (JP)
International Classes:
D01F6/60
Domestic Patent References:
| WO2001029296A1 | 2001-04-26 |
Foreign References:
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Other References:
See also references of EP 1985728A4
Attorney, Agent or Firm:
MIHARA, Hideko (1-1 Uchisaiwaicho 2-chome, Chiyoda-k, Tokyo 11, JP)
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