Patent ID: 6245437
Filing Date: 2001-06-12
Classification: B32B,Y10S,Y10T

Abstract:
A composite gas barrier film having a layer structure comprising a thermoplastic resin film laminated on at least one side of a film formed from polyglycolic acid containing at least 60 wt. % of a repeating unit represented by the following formula (1): ##STR8##wherein the polyglycolic acid film is a film formed from polyglycolic acid having a melt viscosity, .eta.* 500 to 100,000 Pa.cndot.s as measured at a temperature of the melting point of the polymer +20.degree. C. and a shear rate of 100/sec, a melting point, Tm, of at least 150.degree. C., and a melt enthalpy, .DELTA.Hm, of at least 20 J/g, and wherein an adhesive layer is provided between the polyglycolic acid film and the thermoplastic resin film.