Patent ID: 9725802
Date: 2017-08-08
CPC Classifications: B05D,B65D,C23C

Claim:
1. A process for applying a silicon oxide barrier coating to a PET container, wherein the PET container comprises a wall having an inner surface and an outer surface, the process comprising the steps of: a. heating a PET container such that at least the outer surface is at a temperature of from 225° F. to about 383° F.; b. forming a coated PET container by applying at least one silicon oxide barrier layer on at least the inner surface of the PET container while the temperature of at least the outer surface of the PET container is at a temperature of from 225° F. to about 383° F.; and c. cooling the coated PET container after step b, wherein the heating step comprises the use of a heating tunnel through which the PET containers travel, and wherein the heating tunnel comprises from two to six heat zones of different temperatures located along a vertical axis of the containers.