How to judge whether the quality of PVC shrink film is qualified

Do you know what standards PVC shrink film has when it is used? How do we judge whether the quality of PVC shrink film is qualified? Let's explain it to you in detail!
(1): First of all, look at the transparency and gloss, a good PVC shrink film has good transparency and good gloss, if you look at it in the sun, there are not too many impurities, it is relatively clean;

(2): Shrinkage capacity, good quality PVC shrink film, when heated, shrinkage capacity is fast; If the quality is poor, it cannot shrink well, or shrink film will take two to three times to heat to complete the shrinkage;

(3): puncture resistance, that is, the shrink film product in the transportation process, PVC shrink film can play the role of protection we want, good PVC shrink film, high puncture strength, will not be easy to be punctured;

(4): Tightness, we often encounter PVC shrink film when heated, there will be cracks, or wrinkles, or small holes, which is the embodiment of tightness; The sealing performance of good PVC shrink film is very good, and after completing the heat shrinking process, shrink wrap is very beautiful and truly achieves the shrinkage effect we want.