HEAT SHRINKABLE FILM AND PROCESS OF PREPARING SAME

摘要

PURPOSE: A multi-layered heat shrinkable film and a manufacturing method thereof are provided to enhance printability and adhesive property, to lighten specific gravity, to prevent supercontraction and environmental contamination and to facilitate collection regeneration. CONSTITUTION: A heat shrinkable film for labels comprises an intermediate layer consisting of polystyrene (PS) based film layer consisting of styrene-butadiene block copolymer represented by the chemical formula 1; and a pair of external layers consisting of acrylonitrile styrene (AS) based films which comprise acrylonitrile-styrene copolymer represented by the chemical formula 2 in both sides of the intermediate layer. In chemical formulas, m and n are polymerization of integers. The styrene-butadiene block copolymer additionally includes polystyrene polymer.