High Barrier Film after Temperature Cycling

High Barrier Film may pass initial OTR and WVTR testing yet face different stress after repeated hot and cold storage. Layer expansion, adhesive response, flexing and seal movement can change the finished package.

A Metallized Film Supplier needs the laminate, temperature range, dwell time, cycle count and barrier target. Cailong publishes grade-specific information for VPET-GZ, while the customer must qualify the converted pack.

Define the Thermal Cycle

Record heating and cooling rates, humidity, dwell time and whether samples are filled. Include realistic carton compression or handling where relevant.

Inspect Each Interface

Check seals, folds, printed surfaces and laminate bonds for curl, tunneling, cracks or delamination. Map changes against package geometry.

Retest Barrier after Cycling

Compare incoming film, cured laminate and finished pouches under matched conditions. Send Cailong the cycle, structure, results and failed packs.