How to prevent static electricity caused by plastics in production

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

1. Reduce or reduce friction to reduce static electricity generation. The accumulation of electric charge reduces the friction speed and reduces the friction coefficient, although this goal can be achieved, it will inevitably lead to a decline in production, which is unrealistic;

In addition, adding a medium (oil) with a large dielectric constant e to the gap between the contact surface of the friction object can also reduce the accumulation of electric charge. However, this method can only be used in certain occasions and has no universal significance.


2. By grafting copolymerization, the main body in the plastic-the polymer has more polar groups or ionized groups, which reduces the resistance, increases the conductivity, and reduces the generation of static electricity and the accumulation of charges. This method is compared. It is troublesome and will change the structure of the polymer, which will inevitably damage other properties, so it is rarely used.

3. It is difficult to realize the method of using conductive devices in the plastic molding process to eliminate static electricity as much as possible in practice.

4. Increase the relative humidity of the plastic processing and product use environment to prevent the accumulation of static electricity. It is only suitable for hydrophilic materials and has little effect on hydrophobic materials.

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 oxidant, or treat the surface of the product with a corona discharge to make it polarized, increase conductivity, and reduce the accumulation of charge. This will inevitably increase equipment and procedures, which is not economical, and the effect is not ideal, and it is rarely used in reality.

7. This method of using antistatic agents is simple and easy to implement, with good effect, and is often used.