Processing process and requirements for protective film die-cutting

Protective film is very common and familiar to everyone, mainly used as a material for protecting screens and casings. Protective film can not only be used as a diecutting product, but also as an auxiliary material for the production of other materials, playing a protective role in various material production and having a wide range of applications; The low price of protective film is one of the reasons why it is widely used.

There are many material classifications for protective film diecutting, and the most commonly used ones are only PE material, PET material, and PVC material. There are single-layer, doublelayer, and threelayer PET protective films, and the specific distinction depends on the model. The characteristics and uses of each type of diecutting protective film are different.

9759彩票集团The die-cutting process of protective film is very strictFirstly, it is required to process in a 1000 level clean workshop environment with extremely high cleanliness;

Secondly, it is required to have low viscosity. After being attached and used, the adhesive force should change little before peeling to reduce the low pollution of the adhesive;

9759彩票集团Thirdly, there must be no residual adhesive, and thick transparent PET substrate must be used as the production raw material, suitable for semi cutting.

9759彩票集团During the processing, various problems are often encountered, and protective film processing is no exception.

9759彩票集团For example, the protective film made of double-layer PET material has release force and good quality. The adhesive coating is very uniform, the adhesive layer is clean, and it is easy to die cut. After stamping, there will not be too much change. Most protective films made of PE material are single-layer, and before die-cutting, they need to be attached to auxiliary materials such as release paper before processing; At the same time, the elasticity of PE protective film is relatively strong. During the bonding process, it is necessary to avoid internal or external shrinkage. 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 typesetting.

9759彩票集团The protective film shrinks after die-cutting

9759彩票集团After punching and cutting the PE protective film, there is shrinkage phenomenon in the product, which is often encountered in the die-cutting industry. The main problem with punching and cutting the PE protective film is the lamination. As long as the tension during lamination is controlled, or the lamination is punched and cut twice, the size of the product will not shrink severely.

In addition to producing products, protective films can also be used as auxiliary materials during production, with a wide range of applications and low prices. Its materials are mostly PET, PE, and PVC. PET protective film is often double-layer. This type of protective film with a release film has good quality, uniform coating of the adhesive layer, high cleanliness of the adhesive layer, easy processing, and will not have significant changes after punching and cutting. The processing environment requires a high level of cleanliness.

9759彩票集团The production of protective film is afraid of dirt and is also afraid of stretching, both of which are fatal injuries. The former can be improved due to the production environment conditions, while the latter is closely related to the material. Just like the electrostatic protective film made of PVC material, its expansion and contraction 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 the other direction, and it is not proportional. How to solve this headache inducing problem, currently we have to adjust and scale the size of the cutting die according to its characteristics.

To summarize the die-cutting process of protective film, the following points are required:

1. The biggest concern for protective film die-cutting products is dirt and dust, which is closely related to the production environment of the manufacturer. To make clean and beautiful products, there needs to be a dust-free workshop, at least a standard dust-free workshop, even a hundred or thousand level dust-free workshop.

2. After the protective film is die cut and formed, there will be expansion and contraction when pulled apart or pulled up. However, there is currently no better way to solve this problem. The only solution is to expand and contract according to the characteristics of the protective film, and scale the steel blade of the die cutting die.

3. Based on the above two points, after a long period of attempts by die-cutting masters, a preliminary solution has been developed to solve the problem of shrinkage in protective film die-cutting products. In fact, laminating is very important. As long as the tension of the laminating is well controlled, or a secondary laminating is used, and then the product is molded, the shrinkage of the die-cutting processed product will not be so severe