This film has good physical stability, mechanical strength, air tightness, high transparency and gloss, toughness and wear resistance. Generally, the thickness of use is 20~40μm, which has the advantages of light weight, non-toxic, odorless, moisture-proof, high mechanical strength, good dimensional stability, good printing performance and good transparency. It has the advantages of high transparency, good gloss, good barrier, high impact strength and low temperature resistance.