| 摘要 |
PROBLEM TO BE SOLVED: To provide a porous film which is flexible and excellent in both the dispersion of a filler and tensile tear strength, and has high moisture and air permeabilities. SOLUTION: This film is made from a resin composition consisting of 100 pts.wt. polyolefin (suitably one having a density of 0.89-0.94 g/cm<3> ), 50-400 pts.wt. barium sulfate having a mean particle diameter of 0.3-5μm, and 0.3-10 pts.wt. zinc salt of a fatty acid. It is made porous by stretching. |
