| 摘要 |
PROBLEM TO BE SOLVED: To obtain a composition having excellent blow moldability by mixing an ethylene/α-olefin copolymer having a specified melt flow rate, a specified density and a specified weight-average molecular weight/number-average molecular weight ratio with a low-density polyethylene having a specified melt flow rate and a specified density in a specified ratio. SOLUTION: This composition comprises 5-80 wt.% ethylene/3-18Cα-olefin copolymer (A) having a melt flow rate of 0.5-50 g/10 min (as measured at 190 deg.C under a load of 2.16 kg), satisfying the relationship of the formula (wherein WA is the amount (wt.%) of component added), having a density of 0.87-0.93 g/cm<3> and a weight-average molecular weight/number-average molecular weight ratio of 1.5-3.3 and 95-20 wt.% low-density polyethylene (B) having a melt flow rate of 0.01-10 g/min and a density of 0.915-0.94 g/cm<3> . Component A is a copolymer prepared by polymerization in the presence of a metallocene catalyst and comprising ethylene and 3-50 wt.%α-olefin, and component B is a polymer prepared by polymerization in the presence of a polymerization initiator such as an organic peroxide under high pressure. |
