THERMALLY SHRINKABLE VOID-CONTAINING LAMINATE FILM AND THERMALLY SHRINKABLE VOID-CONTAINING FILM

摘要

The object is to provide a thermally shrinkable film which has a low bulk specific gravity, can be separated readily by liquid gravity separation when used as a label for a PET bottle, has high stiffness, breaking resistance, excellent shrinking property and a small natural shrinkage, and can be separated readily by liquid gravity separation. Disclosed is a thermally shrinkable void-containing laminate film which comprises at least two layers comprising a layer (1) and a layer (II). The layer (I) comprises a mixed resin composition which comprises a component (A) comprising a given polylactate resin composition and a component (B) comprising a given polyolefin resin composition, wherein the content of the component (B) is 10 to 90 parts by mass inclusive relative to 100 parts by mass of the component (A). The layer (II) comprises a resin composition comprising mainly the component (A). In the layer (I), the aspect ratio of a dispersion domain comprising the component (B) dispersed in a matrix composed of the component (A) with respect to the direction orthogonal to the main shrinkage direction is 5 to 50 inclusive.