continued from part 1 - Controller General of Patents, Designs, and ...

(12) PATENT APPLICATION PUBLICATION (21) Application No.6490/DELNP/2008 A
(19) INDIA
(22) Date of filing of Application :24/07/2008 (43) Publication Date : 24/10/2008
(54) Title of the invention : "META-TYPE WHOLLY AROMATIC POLYAMIDE FIBER HAVING EXCELLENT HIGH-
TEMPERATURE PROCESSSBILITY AND METHOD FOR PRODUCING THE SAME"
(51) International classification :D01F 6/60 (71)Name of Applicant :
(31) Priority Document No :2006-022364 1)TEIJIN TECHNO PRODUCTS LIMITED
(32) Priority Date :31/01/2006
Address of Applicant :6-7, MINAMIHOMMACHI 1-
(33) Name of priority country :Japan
CHOME, CHUO-KU, OSAKA-SHI, OSAKA 5410054, JAPAN
(86) International Application No :PCT/JP2007/051880 Japan
Filing Date
:30/01/2007 (72)Name of Inventor :
(87) International Publication No :WO 2007/089008 1)TAKIUE, KORATO
(61) Patent of Addition to Application
Number
Filing Date
:NA
:NA
2)FUJITA, HIROSHI
(62) Divisional to Application Number :NA
Filing Date
:NA
(57) Abstract :
Upon producing a meta-type wholly aromatic polyamide fiber by wet spinning a polymer solution containing a meta-type wholly
aromatic polyamide containing a m-phenylenediamine isophthalamide skeleton as a major component, and an amide solvent
containing a salt, (1) the polymer solution is ejected into a coagulation bath containing an amide solvent and water and containing a
salt at a low concentration to coagulate as a porous thread body (fibrous material), (2) which is subsequently stretched in a plastic
stretching bath containing an aqueous solution of an amide solvent, (3) is rinsed with water and then subjected to a heat treatment in a
saturated steam atmosphere, and (4) is then subjected to a dry heat treatment, so as to produce a novel meta-type wholly aromatic
polyamide fiber that contains an extremely small amount of a solvent remaining in the fibers, contains a small amount of a volatile
substance harmful in a heat treatment step at a high temperature, is capable of suppressing coloration of a fiber product, and is capable
of providing a product with high performance and high quality.
No. of Pages : 48 No. of Claims : 11
The Patent Office Journal 24/10/2008 25967