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Mobile phone protective film die-cutting process
- 2019-03-23-

As we all know, in the construction of electronic products, protective film die-cutting is an indispensable part. Whether it is a mobile phone, a camera or a tablet computer, a maintenance film should be attached to the product screen to maintain the product screen.

The transparency, flatness and cleanness of the protective film die-cutting affect consumers' impression of electronic products. A good quality maintenance film will also enhance the external image of electronic products. Therefore, the die-cutting factory maintains the film for consumption. There are strict process control.

Maintain membrane data selection

When consuming and maintaining the film, there are a few points to be aware of when selecting materials. First of all, we must select the more suitable printing and die-cutting materials on the basis of satisfying the customer's request. For example, the scratch resistance is good, the ink adhesion is good, and it is not easy to absorb ink.

Maintain membrane consumption environment control

It is critical to maintain membrane quality control. It is important to prevent scratches and dirt. In order to meet these two requests, we must first have a good consumption environment. The die-cutting factory is equipped with an independent dust-free purification workshop to stop the maintenance of membrane consumption. The dust-free purification workshop is also called clean workshop, clean room (clean room), clean room, which means to sweep out the particles, harmful air, bacteria and other pollutants in the air within a certain space, and the indoor temperature, cleanliness, Pressure, airflow and airflow, noise and illumination, and static control are within a certain range of demand, giving a specially designed room. Regardless of how the external air conditions change, it is required to maintain the parameters such as cleanliness, temperature, humidity and pressure that were originally set in the clean room. According to the needs of consumer products, the cleanliness of the dust-free purification workshop has different levels of 100, 1000, 10,000, 100,000 and 300,000.

In the dust-free purification workshop, under the dynamic conditions, the biggest source of bacteria and dust is the operator. Therefore, before the operator enters the dust-free purification workshop, it is necessary to wear a clean clothes and blow it with clean air for 15 seconds in the air shower to remove the dust particles attached to the exterior of the clothes.

Maintenance film printing process control

Most plastic films (such as polyolefin films) are non-polar polymers with low surface tension, typically 29 to 30 mN/m. In theory, if the surface tension of an object is less than 33 mN/m, it is currently known. The ink and the adhesive are not attached to the top, so the corona treatment should be stopped on the outside. The maintenance membrane material is mostly polyolefin. Corona treatment is required before printing. Usually, the corona power is 4.0W and the speed is 30m/min. After corona, request to print on the machine within 5 minutes, if you need to re-corona for more than 10 minutes, you can get on the machine.

During the printing process, since the maintenance film data will come into contact with the embossing roller, the friction will form a scratch on the data surface. Therefore, it is necessary to pack all the embossing rolls that are in contact with the maintenance film with a soft layer. It is known that in the composition of electronic products, the maintenance of the film is an essential part, whether it is a mobile phone, a camera or a tablet, before leaving the factory. A layer of maintenance film is attached to maintain the product screen. Maintaining the transparency, flatness and cleanliness of the film affects the consumer's impression of the electronic product. A good quality maintenance film will also enhance the external image of the electronic product. Therefore, the die-cutting factory has a maintenance film product for consumption. Strict process control.

Maintenance film die cutting process

After the maintenance film is finished, the die-cutting machine should be used to stop the die-cutting. During the die-cutting process, attention should be paid to prevent scratches and ink collapse. The detailed performance of the ink-disintegration is that the ink layer on the edge of the product should be covered and smooth, but the result is There is a phenomenon that there is no ink in part.

The main reason for the ink -collecting during the die-cutting process of the protective film is that the ink and the maintenance film are not sufficiently adhered. When the edge of the product is die-cut, the ink layer and the maintenance film are separated, thereby producing a jagged edge. Therefore, the printed maintenance film should be checked for the adhesion fastness of the ink to ensure that the ink adheres well before the die cutting can be stopped. In addition, when the thickness of the ink layer is too thick, ink collapse occurs.

There are many reasons for the easy formation of scratches during the die-cutting process. The most common is that the nip rolls are not rotated evenly, so that the data and the nip rolls are relatively slipped to form a scratch. Therefore, it is necessary to stop the rotation of the nip rolls before die cutting to ensure that the nip rolls in contact with the data are all sensitive. In addition, foreign matter on the nip roll can also cause scratches on the maintenance film and scars. Therefore, use a clean cloth to remove alcohol before the die cutting. Stop the nip on the nip roll to ensure that the nip roll is clean and free of foreign matter. .

The die-cut shape of the maintenance film is generally designed according to the customer's drawing request, mainly based on the screen size of the customer's mobile phone product, usually a rectangle with rounded corners, and a handle in the lower right corner of the rectangle. The handle is printed on the reverse side, and then covered with a PET film, which is assembled by the customer, and the consumer will remove the maintenance film from the screen. The maintenance of various shapes of the film is a round knife, but the number of round knives used for the complicated process needs to be increased. For example, the maintenance film required for the handle requires two round knives and one cutting handle. The other is cut out.

Maintenance film packaging process control

After the maintenance of the film die-cutting, it is usually rolled into a roll, and the package is first cut into single pieces, and each of the 500 pieces is stopped in a group. When packaging, first wrap the maintenance film with a stretch film and then put it into the plastic bag. The main concern when packaging is the cleanliness, so the operator is asked to wear the finger cot into the manual operation. For example, there is a need for a maintenance film product. After the manual hand-applied handle, the operator is asked to attach the handle to the precise position of the rubber film (ie inside) of the maintenance film, and to ensure that the product is not dirty and cannot have foreign matter. All the above processes are requested to be completed in the dust-free purification workshop.

The maintenance film of the mobile phone seems to be simple, and the consumption process is not complicated, but the request for each link is more stringent. In general, be sure to pay attention to cleanliness and prevent bending and scratching of the maintenance film. It is the above-mentioned bit by bit details that determine the level of the product.