| 摘要 |
<p>A film consists of a composition comprising: (A) at least one polyamide; (B) at least one block polymer comprising polyamide and polyether blocks; (C) at least one polyolefin; and (D) at least one functionalised polyolefin. The impact resistance of the film (DART TEST) is greater than that of a film containing the same quantities of (A), (C) and (D) but not containing (B). Preferably, (A) is PA-6 or PA-6,6. (B) is a block copolymer of PA-6 and polytetramethylene glycol. (C) is selected from LLDPE, VLDPE, polypropylene, ethylene/vinyl acetate copolymers or ethylene/alkyl (meth)acrylate copolymers. (D) is selected from ethylene/ alkyl (meth)acrylate/maleic anhydride copolymers, ethylene/vinyl acetate/maleic anhydride copolymers or ethylene/propylene copolymers mostly composed of propylene grafted with maleic anhydride and condensed with mono amine polyamide-6 or caprolactam mono-amines.</p> |
