What is the difference between stretch film and shrink film?

Stretch film is a new type of packaging material in the logistics industry. It uses imported resin and advanced flow film extrusion production technology, which makes our product packaging more convenient. Stretch film has good tensile properties, tear resistance, strong penetration resistance, high transparency, good self-adhesiveness and high retraction rate, tight packaging and no looseness. Nowadays, the market is getting bigger and bigger. Many users can't tell the difference between the stretch film and the shrink film. Today, the technicians from Shenzhen Zhanhui manufacturers will introduce you:

 

First, shrink film

Shrink film is used for the sale and delivery of various commodities, the main effect of which is to stabilize, conceal and maintain goods. Shrink film is used in the sale and delivery of various commodities. Its main effect is to stabilize, conceal and maintain goods. It is necessary for the shrink film to have high puncture resistance, good shortening and a certain shortening stress. In the shortening process, the film cannot be filled with holes. Since shrink film is often suitable for outdoor use, it is required to add a UV anti-UV agent.

 

Second, stretch film

It is produced by using imported linear polyethylene LLDPE resin and tackifier special additive. The earliest use of PVC as the substrate in China, DOA is a plasticizer and a self-adhesive effect to produce a PVC surrounding film. From the single layer to the second and third layers; now the LLDPE stretch film is mainly produced by the casting method, and the early LLDPE stretch film is mostly blown film. This is because the production of the casting line has the advantages of uniform thickness and high transparency, and can be applied to the requirement of high-rate pre-stretching. Since the single-layer casting can not achieve single-sided adhesion, the application field is limited, and the 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.

 

Third, the difference

 

In terms of tensile strength and strength, the stretched film can better adapt to the geometric packaging of the product and avoid damage to the product. The stretched film also has good functions of dustproof, rainproof, etc., and is used for the purpose of distinguishing the stretched film and the shrink film function for the packaged article. High-performance resins and accessories can be used to meet the needs of different users.