Why are there more and more layers of stretched film？

Now, stretch film products are often seen in our daily life, and an interesting phenomenon has also been found, that is, the number of layers is increasing. Do you know why? The editor of zhiteng stretch film manufacturer will tell you.

In the highly competitive stretch film market, the more layers of stretch film, the more market share. Therefore, the product is changed from 5-layer film to 7-layer film or 9-layer film, which depends on improving performance or reducing cost. Show application benefits. Affected by this, the production equipment of stretched film is also developing in the direction of multi-layer and large-scale.

Films with many layers are only suitable for machine-wrapped cast stretch films. Hand-wrap blown stretch films have one to three layers of LLDPE blends containing expensive adhesion additives not used in cast films. Films with more layers generally do not have more different materials. Separation of a resin stream into flakes stacked together creates excess flakes in the feedblock. This technology is generally used in sheet extrusion to obtain a more uniform resin distribution. Alternating thin layers of industrial extrusion can improve pinhole strength. Extruding metallocene resins thinner actually makes them less prone to cracking, just like glass.