Process for preparing a thermally shrinkable multilayer film

A process for preparing a thermally shrinkable multilayer film comprising the steps of:

• (a) biaxially orienting an unoriented laminate film coextruded so as to be composed of a polyamide resin layer as one surface layer and a sealant material layer as the other surface layer;
• (b) then contacting the polyamide resin layer with water to allow the polyamide resin layer to absorb water in the amount of 7.0% by weight or more while maintaining the temperature of the oriented laminate film at 90.degree. C. or lower;
• (c) heating the oriented laminate film to temperatures ranging from 50.degree. C. to 90.degree. C. after or during step (b);
• and
• (d) drying the oriented laminate film so as to cause the water content of the polyamide resin layer to be in the range from 2.5% by weight to 6.5% by weight while maintaining the oriented laminate film at temperatures of 90.degree. C. or lower after or during step (c), step (d) being conducted after step (c) when step (c) is conducted during step (b).