In life, due to electrostatic adsorption, dust with opposite-sex charges will adhere to the surface of textiles, and when tops and pants are different materials, the charges of different polarities cause mutual attraction, resulting in the phenomenon of clothes and clothes entangled with each other and clothes entangled with the human body. In addition to the above general hazards, textiles and clothing static electricity phenomenon may cause significant losses. So what are the methods of textile antistatic test?
1 Abrasion charged voltage measurement (Rotary Statics) method:
Principle: Under certain tension conditions, so that the sample and the standard cloth friction with each other, to the highest voltage generated at this time and the average voltage evaluation. Note: When the sample front and back electrostatic properties are different, both sides should be measured.
2 Friction charged charge measurement method:
Make the sample friction with static electricity, put into the Faraday cylinder, test the total amount of charge.
3 Impedance measurement method:
Select two points at a certain distance on the surface of the specimen, contact with electrodes, and test the inter-pole resistance.
Commonly used in the evaluation of the antistatic performance of dust-free clothing, computer room anti-static clothing and carpets.
4 Human body with voltage measurement method:
Used for carpet, automotive fabrics and other decorative fabrics antistatic performance testing.
5 Electrostatic adsorption test (Cling) method:
Make fabric friction charged, test fabric electrostatic force resistance gravity in the metal plate attached to the time.
6 electrostatic decay time (Charge Decay) measurement method:
Add a certain voltage to the specimen (usually 5000V), test the voltage induced by the specimen, and test the charge decay half of the time used.
7 Walking (simulated walking) test method:
Simulate the way people walk on the test specimen, shoes and specimen friction charged, test the voltage carried by the human body. Usually used as a carpet anti-static performance test.
8 Half-life measurement method:
The principle is to make the specimen in the high-voltage electrostatic field charged to stable, disconnect the high-voltage power supply, so that the voltage through the grounded metal table natural decay. Test its voltage decay for the initial value of half the time required. Half-life performance technical grade requirements: A level ≤ 1.0S B level ≤ 5.0S C level ≤ 15.0S. Anti-static work clothes should reach A-level indicators, daily clothing (functional) should reach B, C-level indicators.
9 Ash absorption test (Ash Test):
The friction charged specimen is brought close to the dust to determine the degree of dust adsorption.
10、Abrasion charged decay method:
Japan's antistatic fabric test method standard, add a certain voltage (usually 5000V), cotton and wool abrasive cloth and the specimen automatically rubbed, while the output voltage and curve, get the half-life and static voltage. Can scientifically test fabrics containing conductive fibers.
With the massive use of microelectronic devices susceptible to electrostatic losses such as integrated circuits, the hazards caused by static electricity are becoming increasingly prominent. Therefore, antistatic is a common feature of textiles that should be continuously developed. In order to overcome the problem of electrostatic discharge, many researchers are developing composite antistatic textile materials with the following characteristics: durable antistatic, fast electrostatic escape, low chance of micro-dust particle generation, good corrosion resistance and comfort performance, etc. The types of antistatic products are constantly being developed and improved. At the same time the standard of antistatic products and the corresponding test method standards should also continue to improve.