Patent ID: 6749940
Filing Date: 2004-06-15
Classification: B29C,B29K,B29L,B32B,Y10T

Abstract:
A moistureproof multilayer film, comprising a composite film having a non-moisture absorbing resin layer and a vapor deposited film of an inorganic oxide or a metal formed on at least one side of the non-moisture absorbing resin layer,the multilayer film having such a layer structure where the vapor deposited film surface of the composite film is laminated through an adhesive layer on a vapor deposited film surface of another composite film or a surface of another non-moisture absorbing resin layer, wherein a total number (n) of the deposited films laminated adjacent to the adhesive layer is 2 to 8, and wherein a moisture permeability (W; unit: g/m2.day) as measured under conditions of a temperature of 40Â° C. and a relative humidity of 100% satisfies a relation represented by equation (1). W&lE;(1/n)Ã—0.20.â€ƒâ€ƒ(1)