| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminate microporous film which is excellent in balance between electric resistance and withstand voltage properties.SOLUTION: There is provided a laminate microporous film comprising a first microporous film formed of a first resin composition and a second microporous film formed of a second resin composition having a lower melting point than the first resin composition, and the ratio of the capacity of pores of 0.40-1 μm in pore diameter to the capacity of pores of 0.01-1 μm of the second micropore film is 10% or lower. |
