| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polyamide excellent in stretchability especially successive biaxial stretchability. SOLUTION: This polyamide comprises a diamine and a dicarboxylic acid including a 6-22C branched and saturated carboxylic acid as essential components. The preferable composition is 50-99.95 mol% lactam and/or aminocarboxylic acid, 0.025-25 mol% diamine and 0.025-25 mol% dicarboxylic acid wherein 5-100 mol% of the dicarboxylic acid is a 6-22C branched and saturated carboxylic acid. As the 6-22C branched and saturated carboxylic acid, 1,6-decanedicarboxylic acid is preferable.
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