POLYAMIDE POLYMER HAVING EXCELLENT SHRINKAGE

摘要

PURPOSE: Provided is a polyamide polymer for imparting a shrinkage when polyamide fiber is produced, which can be used for producing a fabric having soft and rich feeling when post-processing. CONSTITUTION: The polyamide polymer is obtained by polymerizing 70-99 mol% of hexamethylene diamino adipate, and 0.5-15 mol% of each of aliphatic diamine compound substituted with alkyl group and adipic acid, which are monomer components. The aliphatic diamine substituted with alkyl group is particularly 2-methylpentamethylene diamine. The polyamide polymer has slower crystallization rate than that of polyamide 66, and thus shows an increased orientation in non-crystallized area when thermal elongation.