METHOD FOR MANUFACTURING HEAT-SHRINKABLE POLYETHYLENE FILM AND HEAT-SHRINKABLE POLYETHYLENE FILM OBTAINED BY THE METHOD

摘要

PROBLEM TO BE SOLVED: To provide a heat shrinkable film small in tensile elongation, excellent in low-temperature shrinkability and excellent even in appearance after shrinkage.;SOLUTION: The method for manufacturing a heat shrinkable polyethylene film comprises the steps of: (A) forming an inflation film by subjecting a polyethylene resin including a low density polyethylene as a principal component to inflation molding so as to become a blow ratio (a draw ratio) of 3.0-6.0 times in a longitudinal direction and a horizontal direction at a temperature equal to or more than the melting point of the low density polyethylene; and (B) further drawing the inflation film formed in the step (A) to 1.1-3.0 times in at least one direction at a temperature equal to or less than the melting point of the low density polyethylene.;COPYRIGHT: (C)2015,JPO&INPIT