How to distinguish the toughness of PVC heat shrinkable

The quality of shrink film is mainly reflected in toughness. Generally speaking, the quality of the shrink film cannot be seen with the eyes. It looks roughly the same from the outside, or it just looks different from the color thickness. So how do we evaluate the toughness of PVC shrink film?

First, after packaging the product with PVC heat shrinkable film, poke a hole with your finger. If the hole is only the size of a finger, then the quality and toughness of the shrink film are very good, and the shrink film with poor toughness is poke it At that time, a very long opening will pop open, which will not provide good protection, so everyone must pay attention to the question of whether the toughness is good or not when choosing PVC heat shrinkable film.