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Do you know the die-cutting process of protective film?

As we all know, in the composition of electronic products, protective film is an essential part. Whether it's a mobile phone, camera, or tablet, protective film needs to be applied before leaving the factory to protect the screen of the product. The transparency, smoothness, and cleanliness of the protective film affect consumers' impression of electronic products. High-quality protective film can also enhance the external image of electronic products. Therefore, we have strict process control for the die-cutting process of protective film products.

Process control for protective film die-cutting:

After the printing of the protective film is completed, it needs to undergo forming on a circular knife die-cutting machine. During the die-cutting process, it is important to avoid scratches and ink collapse. The specific manifestation of ink collapse is that the ink layer on the edges of the product should be smooth and the result is the phenomenon of some areas without ink.

The main reason for ink collapse during the die-cutting process is the insufficient adhesion between the ink and the material. When cutting the edges of the product, the ink layer will separate from the material, resulting in jagged edges. Therefore, when printing protective film products, it is necessary to check the hardness of the ink to ensure good ink hardness for die-cutting. In addition, ink collapse can also occur when the ink layer is too thick.

There are several reasons that can easily cause scratches during the die-cutting process. The most common reason is the uneven rotation of the squeeze roller, which causes relative sliding between the material and the roller, resulting in scratches. Therefore, it is necessary to ensure the flexibility of the roller in contact with the material before checking the rotation of the roller. Additionally, foreign objects on the roller can also cause scratches on the protective film. Therefore, before die-cutting, it is necessary to use a clean cloth dipped in alcohol to wipe the roller to ensure its surface is clean and free of foreign objects.

The shape of the die-cutting for protective film is generally designed according to customer drawings, mainly based on the screen size of the customer's mobile phone product. It usually takes the form of a rectangular shape with rounded corners and a handle in the lower right corner, which is printed on the back. Then an additional layer of PET is added for easy assembly by the customer and convenient removal by consumers. Various types of protective films are produced using circular knife die-cutting machines, but when the process is complex, the number of circular knives required will increase. For example, protective films that require handles need two circular knives, one for cutting the handle and the other for cutting the outer part.

Though the production process for mobile phone protective film may seem simple, it is not without complexity. Every step has strict requirements. Generally, we must pay attention to cleanliness at all times to avoid curling and scratching of the protective film. It is these details that determine the product's quality.

A good mobile phone film also relies on high-quality production machinery. If the machine selection is not good, the aforementioned issues will occur frequently, especially when the machine is working under high intensity. Therefore, it is crucial to purchase a high-quality circular knife die-cutting machine.


Protective films, also known as protective coatings, play a crucial role in various industries by safeguarding surfaces and products from damage, contamination, and wear. The production and application of protective films involve a well-coordinated process to ensure optimum performance and protection.

Firstly, the production of protective films starts with the selection of high-quality materials that possess excellent adhesive properties and durability. These films are typically made from materials such as polyethylene, polypropylene, or polyester, which are known for their strength and resistance to tear and impact. The manufacturing process involves extrusion, casting, or lamination techniques to create a thin, flexible film.

After production, the protective films undergo precision cutting and customization according to specific product requirements. These films can be tailored to fit different sizes and shapes, including flat surfaces, curved edges, and complex contours. The films can even be transparent or colored, depending on the application and aesthetic preferences.

In terms of application, protective films find extensive use in multiple industries. In the automotive sector, they are applied to car exteriors, windows, and interiors, guarding against scratches, UV rays, and chemical exposure. Additionally, protective films are widely used in electronics, construction, and manufacturing industries. They shield sensitive screens and displays, metal surfaces, furniture, and even delicate surfaces during transportation or installation processes.

The application process involves meticulous surface preparation to ensure proper adhesion. The films are carefully applied, avoiding air bubbles or wrinkles, and secured firmly to the surface. Some films have special adhesives that allow for easy installation and residue-free removal, maintaining the original condition of the protected surface.

Overall, protective films are indispensable in preserving the quality, aesthetics, and longevity of various products, materials, and surfaces. Their production involves advanced manufacturing techniques, material selection, and customization to meet specific requirements. With their widespread application and ability to provide reliable protection, protective films continue to contribute significantly to diverse industries worldwide.



Contact: Pamela

Phone: +86 189 6365 3253

E-mail: info@industryprocess.com

Whatsapp:+86 189 6365 3253

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