Patent ID: 7981503

Claim:
A stretched resin film comprising: a thermoplastic polyolefin resin (A); an inorganic fine powder (B) surface-treated with at least one surface-treating agent (D); and a dispersant (C), wherein the stretched resin film has a liquid absorption coefficient of at least 5 ml/(m 2 ·ms 1/2 ), the surface treated inorganic fine powder comprises a hydrophilicated surface, the dispersant (C) is an acid-modified polyolefin, the degree of acid modification of the acid-modified polyolefin is from 0.01 to 20%, the surface-treating agent (D) comprises a water-soluble cation copolymer, and the water-soluble cation copolymer comprises constitutive units derived from a nonionic hydrophilic vinyl monomer and at least one of a diallylamine salt and an alkyldiallylamine salt; further comprising 0.01 to 80 parts by weight of the dispersant (C), relative to 100 parts by weight of a resin composition comprising from 20 to 80% by weight of the thermoplastic resin (A), from 80 to 20% by weight of the inorganic fine powder (B) and from 0 to 50% by weight of an organic filler.