Functional characteristics of polyethylene film

According to different film forming processes, polyethylene film has better tensile strength and openness than polyethylene film. It can be printed on the front side and can be used as food bags, clothing bags, etc.; polyethylene film has uniform thickness, surface gloss, transparency and heat sealing It has better performance than PE and can be printed on both sides, but the production cost is high. Polyethylene film is mainly used as the inner layer of composite bags and packaging for cosmetics, pickles and pastries; low-foaming film has good decorative properties, thick texture, and is not easy to stretch and deform. It is printed on the front and used as New Year pictures, trademarks and hand bags, etc. .

(LDPE) Its main disadvantage is its poor barrier to oxygen. It is often used in the inner film of composite flexible packaging materials. It is also the most widely used and most used plastic packaging film, accounting for about 40% of the consumption of plastic packaging film. %the above. Since the polyethylene molecule does not contain polar groups, has high crystallinity and low surface free energy, the film has poor printing performance and poor adhesion to inks and adhesives, so it is necessary before printing and lamination Perform surface treatment.