Title:
METHOD FOR MANUFACTURING RECYCLED META-TYPE FULLY AROMATIC POLYAMIDE FIBER
Document Type and Number:
Japanese Patent JP2020172727
Kind Code:
A
Abstract:
To provide a new type of recycled meta-aramid fiber with high rupture strength in meta-aramid fiber having excellent properties such as heat resistance, flame resistance, and mechanical properties by recycling fiber structures such as used fabrics, spun yarns, and fiber scraps.SOLUTION: A fiber structure composed of meta-type fully aromatic polyamide fiber is stretched after (1) dissolving the fiber structure in an amide solvent containing 5-50 wt.% of inorganic salt to the total aromatic polyamide fiber, (2) dissolving the meta-type fully aromatic polyamide polymeric material in the solution to prepare a meta-type fully aromatic polyamide spinning dope, and (3) spinning the dope for spinning into a coagulation solution containing 30-45 wt.% of inorganic salt and 1-20 wt.% of amide solvents.SELECTED DRAWING: None
Inventors:
SATO YUSUKE
Application Number:
JP2019076405A
Publication Date:
October 22, 2020
Filing Date:
April 12, 2019
Export Citation:
Assignee:
TEIJIN LTD
International Classes:
D01F6/60; C08K3/00; C08L77/10
Domestic Patent References:
| JPH07286061A | 1995-10-31 |
Foreign References:
| CN101058903A | 2007-10-24 |
Attorney, Agent or Firm:
Taro Tameyama