Stretch wrap film, also known as "wrap wrap film", is extruded by the wrap film production line, using linear polyethylene LLDPE resin and viscosification agent special additives according to a certain proportion of co-extruded, wrap wrap film is currently a very popular international packaging form, high strength, large elastic force, can wrap any geometric shape of goods, and can avoid the damage caused by bundling. It has good anti-loose, rain-proof, dust-proof, anti-theft and other effects, and is widely used in the whole set of packaging and pallet packaging of items, for containers (cans), chemical industry, ceramics, glass, hardware machinery and equipment and steel plate, paper making, textiles, furniture, food industry (beverage packaging), electronic products box and other industries.
Stretch wrap film, also known as "wrap wrap film", is co-extruded by linear polyethylene LDPE resin and viscosifying agent special additives according to a certain formula proportion. Wrap wrap stretch film is a very popular packaging form in the world at present, with high strength and large elastic force. It can wrap goods of any geometric shape and avoid damage caused by bundling. It has good anti-loose, rain-proof, dust-proof, anti-theft and other effects, and is widely used in the whole set of packaging and pallet packaging of items, for containers (cans), chemical industry, ceramics, glass, hardware machinery and equipment and steel plate, paper making, textiles, furniture, food industry (beverage packaging), electronic products box and other industries.
Stretch wrap film, also known as elastic film or wrap film, has a high tensile temperature, tear strength and has a good retraction memory and unique self-adhesive, can make the object tightly into a whole, to prevent the scattered explosion during transportation. The product is a single or double-sided viscous plastic film that can be stretched and wrapped tightly. It does not require thermal shrinkage treatment during the packaging process, which is conducive to saving energy, reducing packaging costs, facilitating container transportation, improving logistics efficiency, and facilitating the identification of packaged items due to high transparency, reducing distribution errors. Winding film production line
Domestic early PVC as a substrate, DOA as a plasticizer and self-adhesive production of PVC wrap film, due to environmental problems, high cost (relative PE ratio is significant, the unit packaging area is small), poor tensile and other reasons, when the domestic production of PE stretch film from 1994 to 1995, PVC wrap film was gradually eliminated. PE stretch film first used EVA as a self-adhesive material, but its high cost and taste, and then developed PIB and VLDPE as self-adhesive materials, and the substrate is now LDPE
Mainly, including C4, C6, C8 and metallocene PE(MPE) early winding film is mostly blown film, from single layer development to two layers, three layers: now the production of LDPE stretch film is mainly based on the casting process, this is because the casting line production has the advantages of thick and uniform, high transparency, can be used for high rate pre-stretching requirements. Because single-layer casting can not do single-side sticking, the application field is limited. Single and double layer casting is not as wide as three-layer casting in material selection, and the formula cost is high, so the three-layer co-extrusion structure is ideal. Good tensile film should have high transparency, high longitudinal elongation, high yield point, high transverse tear strength, good puncture performance and so on. Winding film production line
Because single-layer casting can not do single-sided adhesion, the application field is limited, so single and double layer casting in material selection is not as widely used as three-layer casting, and the formula cost is high, so the market is mainly based on more co-extrusion structures with more than three layers
There are three main ways to use PE wrap film:
1. Hand winding film: This is mainly the use of manual packaging, manual winding film generally has low quality requirements, the weight of each roll is generally about 4KG, 5KG, to facilitate the operation;
2. Machine winding film: machine winding film using mechanical packaging, mainly rely on the movement of the goods to drive the die roll packaging, for the tensile strength of the film is relatively high, for the tensile rate of the film also have certain requirements, the general tensile rate requirements in 300%, product roll weight 15KG;
3. Machine pre-stretched wrap film: This kind of wrap film is mainly used for mechanical packaging. When packing, the packaging machine first stretches the stretch film to a certain proportion and then wraps the wrap film around the goods to be packed, and the goods are packed tightly by the resilience of the film. Winding film production line
