What are the methods for testing antistatic properties of textiles?

1. Frictional charging voltage measurement (Rotary Statics) method

Principle: Under certain tension conditions, the sample and the standard cloth are rubbed against each other, and the highest voltage and average voltage generated at this time are evaluated. Note: When the electrostatic properties of the front and back sides of the sample are significantly different, measurements should be made on both sides.

2. Triboelectric charge measurement method

After the sample is frictionally charged with static electricity, it is placed in a Faraday cylinder and the total amount of charge is measured.

3. Impedance measurement method

Select two points at a certain distance on the surface of the sample, contact them with electrodes, and test the resistance between the electrodes.

It is often used to evaluate the antistatic performance of dust-free clothing, computer room anti-static clothing and carpets.

4. Human body charged voltage measurement method

Used to test the antistatic properties of decorative fabrics such as carpets and automotive fabrics.

5. Electrostatic adsorption test (Cling) method

Make the fabric triboelectrically charged and test the time it takes for the fabric's electrostatic force to adhere to the metal plate against gravity.

6. Electrostatic decay time (Charge Decay) measurement method

Apply a certain voltage to the sample (usually 5000V), test the voltage induced by the sample, and test the time it takes for the charge to decay by half.

7. Walking (simulated walking) test method

Simulate the way a person walks on the test sample, and the shoes and the sample are frictionally charged to test the voltage carried by the human body. Usually used to test the antistatic properties of carpets.

8. Half-life determination method

The principle is to charge the sample in a high-voltage electrostatic field until it is stable, then disconnect the high-voltage power supply and allow its voltage to naturally attenuate through the grounded metal platform. Test the time it takes for its voltage to decay to half of its initial value. Half-life performance technical grade requirements: Level A ≤ 1.0S Level B ≤ 5.0S Level C ≤ 15.0S. Anti-static work clothes should meet Class A indicators, and daily clothing (functionality) should meet Class B and C indicators.

9. Ash Test

Place the triboelectrically charged sample close to the dust to determine the degree of dust adsorption.

10. Frictional charging attenuation method

The Japanese antistatic fabric test method standard applies a certain voltage (usually 5000V), automatically rubs the sample with a cotton or wool friction cloth, and outputs the voltage and curve at the same time to obtain the half-life and electrostatic voltage. Fabrics containing conductive fibers can be scientifically tested.

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