What issues should be paid attention to when processing protective films through die cutting

Release time：2024-04-22    Click：25

In fact, people are not unfamiliar with protective films, which are widely used as a material for screen and shell protection. Protective film can not only be used as a die-cutting product, but also as an auxiliary material for the production of other materials. Various problems often arise during the processing of protective film. How should we improve and solve these problems when we encounter them? Next, let's talk about some issues that should be noted when producing protective films made of different materials:

For example, the double-layer PET material protective film is most afraid of dirt and dust during die-cutting processing. The PET protective film itself has a release force, good quality, and the adhesive is applied very evenly. The adhesive layer is also very clean, making it easy for die-cutting processing, and there will not be too much change after stamping. However, its processing environment requirements are relatively high. To produce clean and bright protective film products, there needs to be a dust-free workshop, at least a standard dust-free workshop, and even a level 100 or 1000 dust-free workshop.

Furthermore, the protective film of PE material is mostly single-layer, and the elasticity of PE protective film is relatively strong. When punching and cutting PE protective film, the product will shrink. Therefore, before die-cutting, it is necessary to apply another layer of release paper material before processing; Moreover, it is necessary to control the tension during lamination, or perform lamination twice before cutting, so that the size of the product does not shrink significantly. During the bonding process, it is also necessary to avoid internal shrinkage or external expansion. In order to reduce the scrap rate of protective film die-cutting products, it is recommended to use the minimum size as the marking direction during layout.

When processing protective films through die cutting, one is afraid of dirt and the other is afraid of expansion and contraction, which are the key factors affecting the quality. The former is caused by production environmental conditions that can be improved and solved, while the latter is closely related to the material. Just like the electrostatic protection film made of PE material, its expansion size can reach 0.4-1mm. When the die cut product is pulled up, it will be found that the product shrinks in one direction and extends in another direction, and it is not proportional. There is a preliminary plan on how to solve the problem of shrinkage in protective film die-cutting products: in fact, lamination is very crucial. As long as the tension of the lamination is well controlled, or a secondary lamination is used and then used for punching, the shrinkage of the protective film products produced by die-cutting will not be so severe.