Patent ID: 7067575

Claim:
A water-soluble film made from a resin composition comprising (A) 100 parts by weight of a carboxyl group-modified polyvinyl alcohol having a viscosity of 10 to 35 mPa·s measured at 20° C. with respect to a 4% by weight aqueous solution thereof, an average degree of hydrolysis of 80.0 to 99.9% by mole and a rate of anionic group modification of 1 to 10% by mole, (B) 20 to 50 parts by weight of a plasticizer, (C) 2 to 30 parts by weight of a filler, and (D) 0.01 to 2.5 parts by weight of a surfactant, wherein said plasticizer (B) is a mixture of (B1) glycerol with (B2) at least one member selected from the group consisting of trimethylolpropane and diglycerol in a B1/B2 ratio of 25/75 to 75/25 by weight.