| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polyolefin composition excellent in peeling properties, heat-sealing properties, slipperiness and easiness to open and suitable for heat- sealing, and a laminated body. SOLUTION: This propylene-based block copolymer composition comprises (A) 100 pts.wt. of a propylene-based block copolymer consisting of (a) 1-70wt.% of propylene-based randam copolymer containing more than 90mol% of a propylene component or a propylene-based monomer unit and (b) 30-99wt.% of an propylene-ethylene randam copolymer component containing 10-40mol% of an ethylene-based monomer unit and 90-60mol% of a propylene-based monomer unit, and having a weight average molecular weight of 100,000-500,000 and a ratio of a weight average molecular weight (Mw)/a number average molecular weight (Mn) is 1-4, and (B) 5-60 pts.wt. of a polyolefin having a weight average molecular weight of 1,000-40,000. A laminated body is obtained by overlaying a resin layer formed from the composition on at least one side surface of a polyolefin-based base layer. |
