A METHOD OF PRODUCING A PRINTING INK-DECORATED PACKAGING MATERIAL, IN PARTICULAR FOR ASEPTIC PACKAGES

摘要

The disclosure relates to a method of producing a printing ink-decorated packaging laminate for aseptic packages of the type which is produced in that a web of the packaging laminate is, for the purpose of sterilization, led through a bath of hydrogen peroxide prior to the reforming of the web into aseptic packages. The packaging laminate is produced in that a web of paper which has an outer coating of low density polyethylene (LDPE) is, for the purposes of promoting adhesion, subjected to a corona treatment modifying its polarity, whereafter the thus treated outer LDPE coating is provided with décor of water-based printing ink which is applied in the desired pattern on the outside of the coating. By subjecting the thus printing ink-decorated web to a surface energy-reducing after treatment, there will be obtained a packaging laminate which is susceptible to sterilization with considerably reduced consumption of hydrogen peroxide, at the same time as good adhesion between the water-based printing ink décor and the outer LDPE coating is ensured.