Q:Is it necessary to use PET high-temperature-resistant protective film in lithium battery?

Generally speaking, PET high-temperature-resistant film is used to cover the surface of the battery core before the core is dried. The main function is to protect the surface of the battery core from scratches and the liquid in the battery from corrosion. The film is resistant to high temperature bacause the battery core needs to be dried at temperature of 75-85 degrees. Some PET protective film may be out of shape at that temperature. Meanwhile, there is certain requirement for the adhesion of the protective film. It can't be too sticky. Otherwise the packaging film may be torn down when you dismantle the battery. In addition, it must be ensured that the protective film won't fall off during the following processing of producing the battery core.

Q:If the keyboard protective film is too big, do I need to cut it?

It depends on you. But you should be careful if you really want to cut it. You know there may be bulges on the edeg of the film after you cut it. The side with those bulges should be put upwards.

Q:Is it necessary to peel off the protective film on the refrigerator?

Of course it's necessary.

Q:How to get off the dust attached to the mobile phone protective film?

If you really don't want to get a new film, there is a way that is very effective,and I suggest you try it. You can use the stationery tape or packing tape to stick gently the dust attached to the protective film as much as you can. This is the use the principle of surface adhesion because generally speaking, the stationery tape and packing tape are much more adhesive than mobile phone protective film, so the dust can be removed with them. But you should pay attention not to rub the tape, but to stick the dust with vertical movements. And of course, you should also make the same movements to get off the dust which is attached to the screen, and then recoat the screen with the protective film. In addition, you can also dampen the screen a little bit and then cover it with a protective film. Then you can use a bank card to squeeze out the water between the film and screen. Of course, you'd better use something to suck the water out while squeezing. Don not let the water that you squeezed out get into the phone.

Q:How to wipe off the marks on the protective filmmade by something adhesive ?

The simplest method is to use the adhesive tape.

Q:How many degrees of temperature can ordinary protective film resist?

If it's PET film, it can resist temperature of -40-120℃.

Q:What kinds of materials is the protective film made from?

According to material quality, it can be made from common materials including PET, OPP (PP), PVC and PE.

Q:How to prevent the protective film from damage and the stainless steel from marks when drawing the steel?

The surface quality of drawing dies of stainless steel is highly required. Rough surface can decrease friction and increase the property of adhesive resistance. Therefore, after the grinding processing, the more important work is to remove the processing marks left on the drawing dies. However, few people know the importance of the grinding and polishing processes when making dies. Throughout the whole process, the proportion of grinding and polishing processes should reach one third because the appearance quality of stainless steel products,to a large extent, is determined by the grinding and polishing techniques of making dies. The rougher the surface of dies is, the less it needs re-grinding. And the life of the dies also extends accordingly. If the surface of dies is not well grinded and polished, the marks on the drawn products will be clear. Although there's something to do with the fact that drawing stainless steel can easily cause seizing tumour, too. And to polish these marks takes time and the result is not good. Thus we should pay more attention to the grinding and polishing processes. Only when the surface processing precision of dies improves, can the marks decrease and the life of dies extend. In recent years, various new polishing techniques and polishing tools have arised at home. New processes and equipments such as ultrasonic polishing, electropolishing, abrasive jet and extrusion honing have been developed.

Q:How safe is your slice of graphite?

Mainly used in electronic products, photoelectric materials, LCD LCD screen, LCD backlight, portable computer, high gloss plastic board, ordinary plastic board, all kinds of plastic sheets,

Q:What's the function of the protective film coated on cup lid?

It's used to prevent the lid from scratches during delivery. It is not necessary to pay attention to these details.