What problems will be encountered during the die-cutting process of protective film

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

9759彩票集团   There are many material classifications for diecutting protective films, 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.

1、 The die-cutting processing requirements for protective film are very strict:

9759彩票集团(1) Require processing in a 1000 level clean workshop environment with excellent cleanliness;

(2) Require low viscosity, with minimal changes in adhesive strength after use and reduced contamination of the adhesive after peeling off;

9759彩票集团(3) No residual adhesive, thick transparent PET substrate must be used as the production raw material, suitable for semi cutting.

(4) During the processing, various problems are often encountered, and protective film processing is no exception.

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 the phenomenon of internal shrinkage or external expansion. In order to reduce the scrap rate of protective film die-cutting products, it is recommended to use a small size as the marking direction during typesetting.

2、 The protective film shrinks after punching and cutting

9759彩票集团(1) After punching and cutting the PE protective film, there is shrinkage phenomenon in the product, which is often encountered in the die-cutting industry. Punching and cutting the PE protective film mainly depends on the laminating process. As long as the tension during laminating is controlled, or the laminating process is repeated twice before punching and cutting, the size of the product will not shrink severely.

9759彩票集团(2) In addition to producing products, protective film can also be used as an auxiliary material for magnetic material die-cutting during production, with a wide range of applications and a low price. 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(3) 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 die-cutting of PVC material electrostatic protective film heat dissipation 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.

3、 To summarize the protective film for die-cutting processing, the following points are required:

9759彩票集团1. Protective film die-cutting products are afraid of dirt and dust, and this 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, it will stretch and contract when pulled apart or pulled up. However, there is currently no better way to solve this problem. The only solution is to stretch 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 crucial. As long as the tension of the laminating is well controlled, or a secondary laminating is used before being molded, the shrinkage of the die-cutting products will not be so severe.