IP Library › Patent Application 13119544
Patent Application
App. No. 13/119,544

EASILY DYEABLE META-TYPE WHOLLY AROMATIC POLYAMIDE FIBER

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Quick Facts
Patent No.
US None
App. No.
13/119,544
Abstract

There is provided an easily dyeable meta-type wholly aromatic polyamide fiber excellent in dyeability and acid resistance, and having a very small residual solvent content. The components or conditions of the coagulation bath are appropriately adjusted so as to achieve a coagulated form not having a skin core, plasticization drawing is performed at a specific ratio, and after completing a washing step, a dry heat treatment is performed at a specific temperature.

Claims (2)

1 . An easily dyeable meta-type wholly aromatic polyamide fiber having a residual solvent content of 0.1 mass % or less in the form of the fiber, and having a strength retention ratio of 65% or more in the form of the dyed fiber after 150-hour immersion in a 50° C. 20 mass % aqueous sulfuric acid solution.

2 . The easily dyeable meta-type wholly aromatic polyamide fiber according to claim 1 , wherein the percentage dye exhaustion of the dyed fiber is 90% or more.

Assignments (2)
MERGER Recorded Dec 3, 2012
From: TEIJIN TECHNO PRODUCTS LIMITED
To: TEIJIN LIMITED
Reel/Frame 029393/0416 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 17, 2011
From: YAMAUCHI, YUSUKE; TAKIUE, KOTAROU
To: TEIJIN TECHNO PRODUCTS LIMITED
Reel/Frame 025976/0840 →