| 摘要 |
PROBLEM TO BE SOLVED: To prepare a porous film excellent in transparency, homogeneous stretchability, adhesive property and intercepting property. SOLUTION: This porous film is formed by melt molding a composition comprising a polyolefin resin, a filler and a third component, and then stretching the film to obtain the objective porous film, where the third component is a mixture comprising a hydrogenated castor oil, a polyhedric alcohol having at least 4 carbons and a fatty acid.
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