BIODEGRADABLE SHEET FOR A HEAT CONSTRICTION FILM

摘要

A biodegradable sheet for a heat shrinkable film is provided to ensure low temperature shrinkage and biodegradation property and to obtain a heat shrinkable film with excellent uniform appearance after shirinking. A biodegradable sheet for a heat shrinkable film comprises polylactide resin 90.0-99.0 parts by weight and polylactic acid impact resistant enhancers 1.0-10.0 parts by weight. The sheet has the thermal shrinkage rate of 10% or less in at least one direction of a longitudinal direction and a width direction, when the sheet was left as it is in hot water of 90 °C for 30 seconds. The lactic acid is obtained by polymerizing a lactic acid consisting of L-lactic acid, D-lactic acid or L,D- lactic acid and has the molecular weight of 10,000 or more.