How to prevent static electricity in plastic products?
We all know that plastic products are easy to carry static electricity because plastics have excellent electrical insulation properties. Most of their molecular chains are composed of covalently healthy, neither ionized nor free electrons, so once in the process of friction due to electrons It is more difficult to disappear by conduction after being lost and charged.
When the surface resistance of the object is greater than 10 thirteenth ohms, there is no antistatic ability. Most of the plastic products are above 10 15 ohms), and less than 10 10 ohms have good antistatic properties. Therefore, in order to reduce the resistance value of the surface of the plastic product, it is necessary to add an auxiliary agent, which is the function of the antistatic agent.
Because of the static electricity, plastic products have certain harmful effects in industrial production, which are manifested in the following aspects:
1. Adsorption Plastic products are severely electrostatically dusted, which affects both appearance and product quality. For example, when packaging with a plastic film, it is often disturbed by static electricity and it is difficult to separate into a seal. The shadow film and the record directly affect the definition and sound quality due to vacuuming.
2, electric shock It is generally believed that when the static voltage is as high as 7000 volts, people can not contact, and the static voltage generated during the production of film film often reaches several thousand volts. Another example is that when people use a lot of plastic products in place, they often feel the electric shock.
3. Discharge and combustion Static electricity can cause discharge and combustion. It can be divided into spark discharge and corona discharge. When the gas between the electrodes is completely ionized, a spark discharge occurs between the two poles through a strong current; and when only a part of the insulation between the electrodes is destroyed, corona discharge occurs. Corona discharges are mostly continuous and hum, sometimes developing into spark discharges.