Winding film, elastic film or wrapping film, with self-adhesive, is a one-sided or two-sided adhesive plastic film can be stretched and wrapped tightly packaged items, and self-adhesive adhesive will not be attached to the surface of the packaged items, but only exists on the surface of the film and film. Early LLDPE stretch film to blown film, from single-layer development to two-layer, three-layer; now to the production of LLDPE stretch film by casting method is mainly, this is because of the advantages of cast line production with a uniform thickness, transparency and so on, can be applied to the requirements of the high rate of pre-stretching. Due to the single-layer casting can not be done on one side of the sticky, application areas are limited. Single and double-layer cast in the material selection is not as wide as three-layer cast, the formula cost is also high, so it is still three-layer **** extrusion structure is more ideal. High-quality stretch film should have high transparency, high longitudinal elongation, high yield point, high transverse tear strength, good puncture performance, etc. PE winding film is mainly made of several different grades of polyolefin resin mixed extrusion, with anti-puncture, super strength and high performance, the stacked goods on the pallet for winding packaging, so that the packaging is more solid and neat, more super waterproof role, is widely used in foreign trade, exports, papermaking, hardware, plastic and chemical industries. It is widely used in foreign trade export, papermaking, hardware, plastic chemical, building materials, food and medicine industries.
Unitization: This is one of the biggest characteristics of the winding film packaging. With the help of film's super winding force and retraction. Primary protection: Primary protection provides surface protection of the product, forming a very light and protective appearance around the product, so as to achieve the purpose of dust-proof, oil-proof, moisture-proof, water-proof and anti-theft. Especially important is that wrap-around film packaging makes the packaged goods uniform force, avoiding uneven force damage to the goods, which cannot be done by traditional packaging methods (bundling, packing, tape and other packaging).