What is the difference between stretch film and stretch film?

Both stretch film and stretch film are used to package the sales and transportation of various products, and play the role of protection, stability and cover. The two names refer to the same thing. The concept of stretch film is broader. Stretch film is also called stretch film. Some stretch films can be stretched while others cannot stretch, or the stretch rate is low, so stretch Stretch film belongs to the category of stretch film. Stretch film is also called stretch film and heat shrink film. In the domestic initial stage, PVC was used as the base material and DOA was plasticizer to produce PVC stretch film. But its cost is high. The PE stretch film first used EVA as the self-adhesive material, but also tasted, and later developed PIBV and LDPE as the self-adhesive materials. The base material is now mainly LLDPE, including C4, C6, C8 and metal PEMPE. From single-layer to two-layer and three-layer; now LLDPE stretched film is mainly produced by casting method, and blown film is mostly used for LLDPE stretched film in the early days. This is because the casting line has the advantages of uniform thickness and high transparency, which can be applied to the requirements of high-magnification pre-stretching. Because single-layer casting cannot achieve single-sided adhesion, the application field is limited. Single-layer and double-layer casting are not as extensive as three-layer casting in terms of data selection, and the formula interest is also high, so it is better to use a three-layer co-extrusion structure. A high-quality stretch film should have the characteristics of high transparency, high longitudinal elongation, high yield point, high transverse tear strength, and good puncture performance. Stretch film can not only meet the functions of moisture-proof, dust-proof, touch-proof, transparent display, etc., but also increase the attractiveness of the product. It can also be used to replace all kinds of cartons, which not only saves packaging costs, but also conforms to packaging trends. Stretch film is widely used in the outer packaging of various products such as food, medicine, sterilized tableware, stationery and sports goods, craft gifts, printed matter, hardware and plastic products, telephones, electronic appliances, etc. Previous: Heat shrink packaging and vacuum packaging technology The next one: the application of stretch stretch film in transportation