One characteristic of electrostatic phenomena is adsorption. Static electricity will be formed when the PET film is rubbed on the surface, or peeled off when the film is rolled or rolled, or when the film is running at high speed. If there is dust, paper scraps, hair, etc. near the film It may be adsorbed and affect the quality of the product film (especially the capacitor film). When the static electricity is serious, it may cause fire, electric shock and other accidents. It is known that the static electricity of the polyester film is too large, which has adverse effects on the subsequent processing and the processed products. For example, the static electricity of the bonded PET film can be determined by the static electricity tester, which is generally around 500V. The measurement shows that the static electricity on both sides of the film is also different.

Cause analysis

PET film is a polar electrical insulating material, which makes the charge generated by friction, shear and other actions unable to be transferred, and accumulates on its surface to form static electricity. The static electricity of PET film and the electrical property of resin body Application of additives. And the film making process. Because they directly affect the structure and properties of the surface layer / surface of the film, such as the crystallinity of the surface layer, the number and orientation of polar groups, the size of the contact area between the two films and other factors affecting the formation of static electricity. Therefore, it can also be explained why the static electricity on both sides of the film is different.

resolvent

a. Find out the reason from resin, additive and process and solve it pertinently;

b. Electrostatic eliminator is used in film making and film post-processing

C. A conductive layer is coated on the surface

d. Use antistatic agent / resin.