Why are some anti-static cloth parameters tested unstable?
There are two reasons for testing the surface resistance of anti-static fabrics. First, the anti-static performance of the fabric is not good. Now there are many shoddy merchants on the market, and the customers are tempted by low prices. This is also the purchaser's purchase in order to buy cheaper. Poor products, the second is the poor contact between the tester and the surface of the fabric during the test, can increase the pressure multiple times, multiple tests.
Measuring the warp and weft density: The warp and weft density of the fabric is measured by the warp and weft density mirrors, and compared.
Resistance measurement: The warp and latitudinal resistance of the fabric were measured by a surface resistance tester and compared.
The principle of comparison is: the selection resistance is relatively small; if the resistance is the same, the resistance value is selected to be stable;
Pay attention to whether the fabric is added with antistatic agent during finishing (applicable to conductive silk with only conductive fibers in the warp direction, commonly known as striped cloth). The method is to measure the warp and weft resistance by surface resistance tester, if the same, Note that with the addition of antistatic agents, the measured resistance does not represent the true level.
Look at the microstructure: look at the quality of the cloth with a high magnification magnifying glass, compare the gap size between the fibers (related to the dust filter rate), see if there is any attachment on the fiber surface (related to the amount of dust), and see if the fiber arrangement is neat and tight. (If the tightness is inconsistent, the loose part of the fiber is easy to be worn when worn and washed, and will be dusted when worn later).
Check conductive fiber: Conductive fiber is the key material in anti-static ultra-clean fabric. Checking conductive fiber is to see if conductive fiber is added according to the specification and what kind of conductive fiber is added.
The method of inspection is: carefully cut the fabric along the edge of the black conductive fiber with scissors, and separate the black conductive fiber, use a magnifying glass to observe whether there is one or a few relatively thick fibers, and test with surface resistance. The instrument measures the electrical resistance of the separated conductive fibers. A few pieces are continuously removed, and it can be basically judged whether each black wire in the fabric contains conductive fibers.