| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyolefin film showing excellent tranparence, slippage and an anti-blocking property. SOLUTION: The polyolefin film contains 0.01 to 1 wt.% of aluminum hydroxide having a BET specific surface area of 30 to 500 m<SP>2</SP>/g, a secondary particle diameter of 0.1 to 10μm, a dioctylphthalate absorption amount of not less than 70 cm<SP>3</SP>/100 g to less than 250 cm<SP>3</SP>/100 g and volume of fine porosity having a radius of 50 to 1,000 nm of not less than 0.3 cm<SP>3</SP>/g measured by a mercury compression penetration method. The aluminum hydroxide preferably has a crystalline structure of boehmite or pseudo-boehmite or is amorphous. The polyolefin of the film is preferably polypropyrene. COPYRIGHT: (C)2004,JPO
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