摘要 |
<p>This invention provides a moisture-permeable, waterproof film <Bold>characterized in that</Bold> it consists of two or more resin layers comprising, as polymerizing components, bishidroxyalkyl aliphatic acid and alkyleneglycol, said bishydroxyalkyl aliphatic acid content is 0.08 mmol/g to 0.5 mmol/g, at least a part of said alykyleneglycol is polyethylene glycol contained in an amount of 40 wt% to 80 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<Sup>3</Sup> g/m<Sup>2</Sup>·24h and not more than 200×10<Sup>3</Sup> g/m<Sup>2</Sup>·24h, and a moisture-permeable waterproof composite material to which said moisture-permeable, waterproof film is provided at least on one surface of a substrate material and its moisture permeability by JIS L-1099 "Potassium Acetate Method" (B-1 method) being not less than 1×10<Sup>3</Sup> g/m<Sup>2</Sup>·24h and not more than 50×10<Sup>3</Sup> g/m<Sup>2</Sup>·24h .</p><p><Paragraphs id="pa02" num="0002" xmlns:base="http://www.sipo.gov.cn/XMLSchema/base">This invention makes use of a polymer having excellent moisture permeability, waterproofness durability and capability of being made aqueous, and accordingly, this invention provides a moisture-permeable, waterproof film and a composite material which can be manufactured by an ecological process.</p> |