Patent ID: 7592055

Claim:
A moisture-permeable, waterproof film comprising a resin layer containing two or more resins including, as polymerizing components, bishidroxyalkyl aliphatic acid and alkyleneglycol, said bishydroxyalkyl aliphatic acid content is not less than 0.08 mmol/g and not more than 0.5 mmol/g, at least a part of said alykyleneglycol is polyethylene glycol contained in an amount of not less than 20 wt % and not more than 60 wt % based on said solid resin, and a moisture permeability by JIS L-1099 “Potassium Acetate Method” (B-1 method) at average film thickness of 20 micrometers being not less than 3×10 3 g/m 2 ·24 h and not more than 200×10 3 g/m 2 ·24 h.