| 摘要 |
PROBLEM TO BE SOLVED: To facilitate manual unsealing and to prevent the generation of pinholes and breaking by using a light shielding polyolefin resin film layer contg. plural kinds of specified resins and an effective amt. of a lubricant. SOLUTION: A light shielding polyolefin resin film layer contg. 31-70wt.% high density resin having a low melt index, 29.8-69.8wt.% low density resin having a high melt index and an effective amt. of a lubricant is used. The total amt. of the resins and the lubricant is <=100wt.%. The high density resin is one or more kinds of resins selected from among homopolythylene resin and ethylene-α-olefin copolymer resins each having 0.001-0.45/10min melt index and 0.940-0.985g/cm<3> density. The low density resin is one or more kinds of ethylene-α-olefin copolymer resins each having 0.1-10g/10min melt index and 0.870-0.935g/cm<3> density.
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