| 摘要 |
PROBLEM TO BE SOLVED: To obtain a resin composition which can permit easy formation of a foam excellent in surface wettability, vacuum formability and stampability by making the resin composition contain a propylenic resin, an ethylenic resin, and an ABA block copolymer. SOLUTION: 30-60wt.% propylene resin, such as a polypropylene or a propylene/α-olefin random or block copolymer, having a melt index of 0.4-8g/10min is mixed with 20-40wt.% ethylene resin, such as a low-density polyethylene, a high-density polyethylene, a linear low-density polyethylene or an ethylene/α-olefin random or block copolymer, having a melt index of 1-20g/10min and 10-30wt.% ABA block copolymer, such as a styrene/isoprene block copolymer rubber or a styrene/butadiene block copolymer rubber, having a melt index of 0.5-30g/10min to obtain an expandable resin composition having a surface wettability of 50dyn/cm or above. |
