PROCESS FOR PREPARING HEAT-SHRINKAGE POLYESTER FILM WITH IMPROVED PROPERTY OF GAS-BARRIER

摘要

PURPOSE: A process for preparing heat-shrinkage polyester film with improved gas-barrier property for use as label of PET bottle is provided. CONSTITUTION: The process is characterized in that silicate or aluminum oxide is deposited on the surface of a heat-shrinkage polyester film containing inorganic particles in a depth of 20 to 150 nm. Obtained polyester film has low oxygen and hydrogen permeation flux.