Two factors that affect the performance of antistatic products
Anti-static wrist strap products have a good ability to conduct excess charge and eliminate static electricity. Common methods of destaticization are: grounding, physical neutralization, chemical neutralization, and reduction of surface resistance.
Today, Xiaobian tells you two key factors to solve the performance of anti-static products: surface resistance and friction voltage.
In the field of anti-static, the antistatic coefficient is equivalent to the surface resistance, which represents the resistance (unit: Ω ohm) generated by the dielectric surface of each square area to the leakage current of the opposite side of the square.
1. The resistance is greater than or equal to 1012Ω as an insulator;
2. It is an antistatic body between 104Ω and 1011Ω (the standard antistatic coefficient is: 106Ω to 109Ω);
3. Conductive between 103 Ω and 105 Ω greater than or equal to;
4. The third power less than 10 is the electric field shielding material.
Voltage: The voltage drop that a current can pass through a conductor per unit time U=IR
Friction voltage: After the two materials rubbed or in close contact with each other and separated, the two materials were respectively charged with an equal amount of static charge. Voltage is generated between them, and the voltage between them is called the friction voltage. The friction voltage is related to the material, the degree of friction, the ambient temperature and humidity, and the unit is V. Common factories have requirements for the surface resistance of antistatic products. More stringent requirements require a friction voltage of less than 100V, and higher requirements are less than 50V.
Anti-static products must have excellent anti-static properties to ensure the safety of electronic products, and regular anti-static performance indicators should be tested. Common test equipment is:
Surface resistance tester
The surface resistance tester is an instrument for testing the surface resistance of an object. Commonly used are portable surface resistance testers and heavy hammers.
2.. Electrostatic field tester
The electrostatic field tester is divided into contact and non-contact electrostatic field testers. The housing is made of anti-static material and has a grounding buckle to ensure reliable measurement results. It is mainly used to determine the electrostatic properties of textile raw materials and finished products under laboratory conditions. It can also be used to measure other sheets and plate materials such as paper, rubber, plastic,