Patent ID: 6352785
Filing Date: 2002-03-05
Classification: B29C,B29K,B29L,B32B,C08J,C08K,C08L,Y10S,Y10T

Abstract:
A shrinkable film characterized by being a laminate film having at least one layer formed of a gas barrier resin composition satisfying the following expressions (1) and (2) and by having an average shrinking rate in its longitudinal and transverse directions after immersion in a 120Â° C. oil bath for ten seconds of 45% or more, and at least one other layer:ln(OTR/22.5)+0.0698(Timâˆ’157)andT2âˆ’T1&lE;20â€ƒâ€ƒ(2), wherein the expression (1), OTR and Tim are, respectively, an oxygen transmission rate (cc/m2Â·dayÂ·atm) of a 1.0 &mgr;m thick portion of a film formed of the gas barrier resin composition at 23Â° C. and a relative humidity of 0% and a melting point of the gas barrier resin composition, and in the expression (2) T1 is a haze (%) of a 30.0 &mgr;m thick film of the gas barrier resin composition left at 23Â° C. and a relative humidity of 48% for 48 hours and T2 is a haze (%) of a 30.0 &mgr;m thick film of the gas barrier resin composition left at 40Â° C. and a relative humidity of 90% for 24 hours.