| 摘要 |
PROBLEM TO BE SOLVED: To attain low cost and provide suitability for incineration and recycling, as well as to ensure various characteristics necessary as a packing material for a photosensitive material by using only a polyolefin resin-base film layer. SOLUTION: The packing material comprises a polyethylene resin film layer 1a formed from a polyethylene resin composition in 10-250μm thickness. The composition consists of 5-90 pts.wt. ethylene/α-olefin copolymer resin having 0.1-20 g/10 min melt flow rate, 0.860-0.935 g/cm3 density and a molecular weight distribution of 1.1-10 and 10-95 pts.wt. polyethylene resin having 0.01-1 g/10 min melt flow rate, >=0.936 g/cm3 density and a molecular weight distribution of 11-40. The melt flow rate of the ethylene/α-olefin copolymer resin is 5 times or larger than that of the polyethylene resin. The density of the polyethylene resin is 1.015 times or larger than that of the ethylene/α-olefin copolymer resin, and the molecular weight distribution of the polyethylene resin is 2 times or larger that of the ethylene/α-olefin copolymer resin. |
