Stretch film material: Low density polyethylene (LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE).
As one of the synthetic resins, polyethylene has the largest production, mainly including low density polyethylene, linear low density polyethylene (LLDPE), high density polyethylene (HDPE) and some products with special performance.
Composite stretch film is currently the most widely used and largely consumed, occupying more than 40%of the overall consumption of plastic packaging stretch film. Since polyethylene containing no polar group has high crystallinity and low surface free energy, so surface treatment is required before printing and composite. Low density polyethylene stretch film is translucent, shiny, soft. It has excellent chemical stability, heat sealability, water resistance and moisture resistance, freeze-resistant and it can be boiled. Generally low density polyethylene stretch film is made by blow molding and curtain coating. polyethylene stretch film made by curtain coating is of uniform thickness, but is rarely used because of high prices. Blow-molded polyethylene stretch film is made by PE particles blown from the blow molding machine. It is most widely used for its low cost. Stretched polyester film is using polyethylene terephthalate as raw material, It is colorless, transparent, glossy stretch film, excellent mechanical properties, high stiffness, hardness and toughness, puncture resistance, abrasion resistance, high temperature and low temperature resistance. It has good chemical resistance, oil resistance, air tightness and fragrance holding. it is one of film substrate of the commom composite stretch film that is permeability resistance. But polyester stretch film price is higher, generally having a thickness of 12μm, often used for outer materials of cooking and packaging. it prints well.
