| abstract |
Disclosed are a porous film prepared from a resin composition comprising (I) (i) a propylene-ethylene copolymer or (ii) a propylene-ethylene copolymer-containing polypropylene resin mixture, each having an ethylene content of 3.0-7.0% by weight and a melt flow rate of 2.0-4.0 g/10 min when measured at 230 DEG C, and (II) a beta crystal nucleating agent, the film having a porosity of 20-80%, an air permeability of 5000sec/100cc or less as measured by Gurley densometer according to JIS P-8117, a moisture permeability according to JIS Z-0208 of at least 2000g/m<2>.24h and a water pressure resistance of at least 75 kPa as measured according to JIS L-1092 using a surfactant aqueous solution, as well as a method for producing said film and absorbent articles using said film as a backsheet. |