Antistatic powder coating, namely conductive powder coating, refers to a functional powder coating with certain conductive current and dissipated charge after coating on the substrate. It is mainly used to eliminate static electricity, electromagnetic shielding, electric heating and anti-corrosion. At present, most of the commonly used conductive coatings are doped conductive powder coatings, that is, the polymer itself has no conductivity, the insulating polymer is the main film-forming material, and the coating is formed by adding conductive materials into it. Its conductivity is realized by adding conductive materials. Conductive materials include metal powders (gold, silver, copper, nickel, zinc, aluminum), non-metallic powders (graphite, conductive carbon black, acetylene carbon black, amorphous carbon) and metal oxides (titanium oxide, zinc oxide, tin oxide), which play a role in providing free electron carriers in powder coatings.
In the prior art, the antistatic powder coating directly mixes conductive components, such as conductive fiber, conductive carbon black, etc. The conductive fiber, the conductive mechanism is the use of a certain length of conductive fiber in the coating to form up and down through and conduct electricity. However, when the coating is less than 40 ~ 50um, the entire coating surface is too thin and the conductivity is too strong; When the coating exceeds 120um, the particle size of conductive fiber powder is limited and cannot be uniformly distributed in the coating, resulting in non-conductive. Similarly, conductive carbon black is directly mixed, ground and sprayed because of its particle size and compatibility with powder coating raw materials. It is very easy to have "full conduction" current at the thinned place and "non conduction" at the thick place. Therefore, the conductive fiber and the conductive carbon black directly mixed have the problem that the requirements for the spraying operation of downstream customers are too high and are very difficult to master.