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Cold-seal for flexo printing

Traditional cold-seal adhesives for food packaging are applied by patterned gravure, which requires a new gravure cylinder to be re-etched for every change in impression length or configuration. To help eliminate the excess time and cost involved in this process, Ashland Performance Materials has developed a novel synthetic cold-seal adhesive.

Ashland’s Pureseal 23322E water-based, cold-seal adhesive can be applied by the flexo process, avoiding the cost-intensive etching and re-etching of cylinders entirely by using a photopolymer plate. This is of particular importance for shorter, specialised runs in the confectionery bar market.

Pureseal 23322E can be applied as an overall coat or pattern. It seals packages of biaxially oriented polypropylene (OPP), white OPP, metalised OPP, polyester and other substrates suitable for food packaging. It releases from release-treated films or release lacquer-coated substrates and complies with the relevant US F&DA regulations for food packaging.

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