In industry, there are many ways to prevent static electricity in plastics, the main ones are:

1. Lighten or reduce friction to reduce static electricity generation. The accumulation of charge reduces the friction speed and reduces the coefficient of friction, although this purpose can be achieved, but it is bound to lead to the decline of production, which is not realistic; In addition, adding dielectric constant e large medium (oil) to the contact surface gap of the friction can also reduce the accumulation of charge, but this method can only be used in certain occasions, no universal significance.

2. By grafting copolymerization, the main body in the plastic — — Polymer with more polar groups or ionized groups, reduce resistance, increase conductivity, reduce electrostatic generation and charge accumulation This method is more troublesome, and will change the structure of the polymer, is bound to damage other properties, rarely used.

3. Conductive devices are used in the plastic molding process to eliminate static electricity as much as possible. This method is difficult to achieve in practice.

4. Improve the relative humidity of the plastic processing and product use environment, which can prevent the accumulation of static electricity. It is only suitable for hydrophilic materials, and the effect on hydrophobic materials is not large.

5. Adding conductive fillers such as metal powder to the plastic can also prevent the accumulation of static electricity, which brings difficulties to the molding process, and may also affect other properties of the product. Therefore, it is rarely used in practice.

6. Oxidize the surface of the product with a strong oxidizing agent, or treat the surface of the product with corona discharge, so that it produces polarity, increases conductivity, and reduces the accumulation of charge. This is bound to increase the equipment and processes, very uneconomical, and the effect is not ideal, in reality rarely used.

7. The use of antistatic agent this method is simple and easy, the effect is good, often used.