| 摘要 |
PROBLEM TO BE SOLVED: To prepare a porous film excellent in permeability, uniform stretchability, adhesiveness and shielding property, or the like. SOLUTION: This porous film is obtained by melt-forming a composition comprising a polyolefin resin, a filler and a third component into a film and then carrying out stretching treatment of the film. The film is characterized in that the filler comprises at least one king of compound selected from calcium carbonate and barium sulfate and a transparent or white inorganic compound having >=1.7 refractive index in a weight ratio of (99/1) to (50/50), and the third component is a primary or a secondary amide compound composed of >=3C amine and a carboxylic acid. |
