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It is suitable for testing the heat shrinkage performance of various films (such as PE heat shrinkable films for the integrated collective packaging of wines, canned products, mineral waters, and various beverages, as well as shrinkable films suitable for various types of packaging like PVC, POF, OPS, PET, etc.) in liquid media at multiple temperatures.
link:https://www.snlabtester.com/thermal-shrink-meter/thermal-shrinkage-tester.html
Heat Shrinkage Tester