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:
Select the resistance is relatively small; if the resistance is the same, choose the resistance value to be stable; pay attention to whether the fabric is added with antistatic agent in the finishing (applicable to conductive silk with only conductive fibers in the warp direction, commonly known as striped cloth), the method is to use the surface The resistance tester measures the resistance in the warp and weft directions respectively. If the same, it means that the antistatic agent is added, then 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. (The conductive silk is made of carbon organic conductive fiber, which is black or gray, generally around 20D, between 1F and 6F. In order to meet the strength requirements of weaving, an ordinary black or white polyester is required. fiber).
Comparing fabric process parameters: Suppliers are required to provide basic parameters of the fabric, such as yarn denier (how much D, how many F), warp and weft density, fabric texture, finished door width, dye shrinkage, and which conductive fiber to use.
