| abstract |
Provided are a flexible porous film and a moisture-permeable waterproof sheet using the same, despite having excellent water pressure resistance and moisture permeability. SOLUTION: Porosity satisfying P × T ≧ 20,000 (kPa · g / m 2 · hour) with moisture permeability (T) of 300 g / m 2 · hour or more, water pressure resistance (P) of 40 kPa or more. A porous film having a loop stiffness converted to a thickness of 25 μm of less than 500 μN / cm. A moisture-permeable waterproof sheet in which a porous film is mainly composed of polypropylene, a cast sheet is biaxially oriented, and pores are formed in the film, and the porous film and a fabric are laminated. [Selection figure] None |