| 摘要 |
PURPOSE:To obtain a resin composition outstanding in heat resistance, heat sealability, impact resistance, transparency, etc., suitable for retort food packaging materials, etc., by incorporating a poly 4-methyl-1-pentene with specified amount of specific random copolymer. CONSTITUTION:The objective resin composition can be obtained by blending (A) 95-20(pref. 80-30)wt% of a poly 4-methyl-1-pentene with a 4-methyl-1- pentene content >=85mol% and melt flow rate 0.5-200g/10min, and (B) 5-80(pref. 20-70)wt% of a random copolymer with a 4-methyl-1-pentene content 40-80mol, melting point 140-220 deg.C, softening point 90-190 deg.C and degree of crystallinity 15-35%, from 4-methyl-1-pentene and 4-7C alpha-olefin (e.g. 1-butene, 1-pentene).
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