Process for maintaining or improving the mechanical...

Details Process for maintaining or improving the mechanical... Process for maintaining or improving the mechanical...

D - Textiles, Paper

01

D

D01D 10/00 (2006.01) C04B 16/06 (2006.01) D01F 6/80 (2006.01) D06M 11/38 (2006.01)

Patent

CA 2113310

Abstract of the Disclosure A process for maintaining or increasing the tensile strength of fibers of aromatic copolyamides which are built up chiefly from para-monomers and are soluble in organic aprotic and polar solvents in the course of storage in alkaline media is described. The process comprises the measures: a) production of fibers from the said aromatic copolyamides by dry or wet spinning processes which are customary per se, b) after-treatment of the resulting fibers in a manner which is known per se, and c) storage of the fibers in an aqueous environment which has a pH of at least 10 for at least a period of time and at a temperature such that the tensile strength of the said fibers, based on the tensile strength of the fibers employed in step c), is at least retained or increased.

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