Powder coating powder phenomenon, generally we answer is the main factor affecting the powder particles to accept charge and maintain charge is the permittivity of the powder. The lower the permittivity of the powder, the easier the particles charged, but the easier it is to lose charge, which is reflected in the powder on the workpiece adsorption force is not strong, slightly by vibration powder.
For electrostatic spraying powder coating, should be as far as possible with high dielectric constant, it will make the powder adsorption capacity greatly improved.
Powder coating powder manufacturer think for powder electrostatic spraying process, the key is to consider powder coating particles accept charge, keep the charge and charge distribution, which directly affect the adsorption and deposition efficiency of powder on the workpiece. In addition, it is important that without curing powder coating must withstand transport mechanism of mechanical vibration without powder.
In fact, the influence of powder particle charge and keep the charge of the main factors of dielectric constant is powder coating, powder, the lower the dielectric constant of electrically charged particles more easily, but the loss of charge is easy, it reflects the adsorption force of powder on the parts not firm, off powder, slightly affected by vibration for electrostatic spraying of powder coatings, should as far as possible with high dielectric constant, It will greatly improve the adsorption capacity of the powder.
The coating is more uniform.
However, the powder coating with high dielectric constant is difficult to be charged, so it is necessary to improve the structure of electrostatic powder gun and adopt a multi-electrode forced charged structure.
Whether THE thickness OF THE powder can be automatically limited depends ON THE resistivity of the powder itself, and the experiment proves that only the powder with high resistivity can get the proper coating.