| 摘要 |
PURPOSE:To prevent the formation of pinholes and improve flexibility, transparency, and strengths by forming a compsn. comprising a polyamide and a specific polyetheresteramide elastomer into film. CONSTITUTION:10-80wt.% 6-12C lactam or aminocarboxylic acid, a polyoxytetramethylene glycol having a number-average mol.wt. of 600-2500, and an aliph., alicyclic, and/or arom. dicarboxylic acid in a molar ratio of OH of the glycol to COOH of the dicarboxylic acid of 0.9-1.1 are copolymerized to give a polyetheresteramide elastomer having a relatie viscosity of 1.2-5.0. 99.5-91wt.% polyamide is melt mixed with 0.5-9wt.% the elastomer, formed into film, biaxially oriented succesively, and thermally treated to give a 1-50mum- thick polyamide film. |
