Heat shrinkable multilayer film and heat shrinkable label

Abstract

It is an object of the present invention to provide a heat-shrinkable multilayer film which, in the case of using the heat-shrinkable multilayer film as a heat-shrinkable label for a container, does not produce delamination in covering a container, is superior in heat resistance, oil resistance, tearing properties along the perforation and appearance and can prevent the reduction in strength between the layers after a printing step, and a heat-shrinkable label comprising the heat-shrinkable multilayer film as a base film. The present invention is a heat-shrinkable multilayer film which comprises: an outer surface layer comprising a polyester type resin; and an intermediate layer comprising a polystyrene type resin, said outer surface layer and said intermediate layer being laminated by interposing an adhesive layer comprising a polyester type elastomer or a modified polyester type elastomer.

1 - 8 . (canceled) 
     
     
         9 . A heat-shrinkable multilayer film, comprising:
 an outer surface layer comprising a polyester type resin; and   an intermediate layer comprising a polystyrene type resin,   said outer surface layer and said intermediate layer being laminated by interposing an adhesive layer comprising a modified polyester type elastomer,   wherein the polyester type resin composing the outer surface layer contains a component derived from terephthalic acid as a dicarboxylic acid component, and contains a component derived from ethylene glycol and a component derived from 1,4-cyclohexanedimethanol as a diol component; and   wherein the modified polyester type elastomer composing the adhesive layer is a modified product prepared by modifying a block copolymer comprising a polyester and polyalkylene ether glycol with α,β-ethylenic unsaturated carboxylic acid.   
     
     
         10 . The heat-shrinkable multilayer film according to  claim 9 ,
 wherein the polystyrene type resin composing the intermediate layer is an aromatic vinyl hydrocarbon-conjugated diene copolymer.   
     
     
         11 . The heat-shrinkable multilayer film according to  claim 9 ,
 wherein the polystyrene type resin composing the intermediate layer is a mixed resin of an aromatic vinyl hydrocarbon-conjugated diene copolymer and an aromatic vinyl hydrocarbon-aliphatic unsaturated carboxylic acid ester copolymer.   
     
     
         12 . The heat-shrinkable multilayer film according to  claim 10 ,
 wherein the aromatic vinyl hydrocarbon-conjugated diene copolymer is a styrene-butadiene-styrene copolymer and/or a styrene-isoprene-butadiene-styrene copolymer.   
     
     
         13 . A heat-shrinkable label,
 which is obtainable by using the heat-shrinkable multilayer film according to  claim 9 .