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Experiment of GB12703 fabric triboelectric load tester

Author:QINSUN Released in:2023-09 Click:116

The fabric friction charge tester is used to test the electrostatic characteristics of protective clothing and other fabric products after being charged by friction under laboratory conditions. Qisnun Precision Electromechanical Technology Co., Ltd. is the manufacturer. Welcome customers who need to contact us in time. In addition, the tester introduced 6 testing methods in GB/T 12703-1991.

Method A (half-life method):

Use a high voltage of +10 kV to discharge the sample placed on the rotating metal platform for 30 seconds and measure the half-life (s) of the induced voltage. FZ/T 01042 \"Textile materials - Electrostatic properties - Determination of the half-life of electrostatic voltage\" is the same as *. This method can be used to evaluate the electrostatic attenuation characteristics of fabrics, but the contact state of a sample containing fiberss conductive conductors on a grounded metal platform cannot be controlled. When the conductive fibers are in good contact with the platform, the charge leaks quickly, and when the contact is poor, the attenuation rate is the same as that of ordinary textiles. Likewise, the test results of the same sample under different storage conditions are very different, so it is not suitable for evaluating fabrics containing conductive fibers.

Method B (triboelectric voltage method):

Sample (4 pieces, 2 longitudes and 2 wefts, size 4 cm × 8 cm) is fixed on the drum, and the drum rubs against the standard fabric (nylon or polypropylene) at a rotation speed of 400 rpm, and the maximum loaded voltage (V) of the sample in 1 minute is tested. FZ/T 01061 “Method for determining the voltage of electrification by friction of fabrics” is the same, with the exception ofslight differences in abrasive specifications and number of subsamples. This method is not suitable for the antistatic properties of textiles containing conductive fibers because the sample size is too small. For manufacturing integrated circuits containing conductive fibers, the distribution of conductive fibers varies significantly depending on the sampling location. Test evaluation.

Method C (surface charge density method):

After rubbing the sample with the standard nylon fabric in a specific manner under specified conditions, the amount of charge is measured using a Faraday tube. . Depending on the sample size, find the charge area density (μC/m2). Except for slight changes in the specifications of friction cloth, sample pretreatment, diameter of friction rod, number of frictions, etc., FZ/T 01069 “Method of determinationination of the tribocharged charge density of tissues” is the same. The surface charge density method is suitable for evaluating the difficulty of various fabrics, including fabrics containing conductive fibers, in accumulating static electricity by friction. The measured results are closely related to the degree of dust absorption of the sample. Since the friction electrification between the sample and the standard tissue is obtained by manual operation, the consistency of the test conditions, the accuracy and the reproducibility of the test results are easily affected by the operating techniques.

Method D (clothing amount loading method when removing clothes):

Scrub work clothes with chemical fiber underwear in a specific way , take off the work clothes, put into the Faraday cylinder and find the amount of charge (μC/piece). The test object of this mThe method is limited to clothing, the material of underwear is not specified, and the rubbing method is difficult to be consistent and lacks comparability.

Method E (friction loading method of work clothes):

Use a drum dryer (above 45 rpm) lined with cloth standard nylon or polypropylene to friction electrify the workwear sample for 15 minutes. , put it in a Faraday cylinder to measure the charge of work clothes (μC/piece). This method is basically consistent with the important measurement method stipulated in the product standard GB/T 12014 \"anti-static work clothing\", and is suitable for the friction load test of clothing; its technical essence is also consistent with the C method (surface charge density method).

Method F (inter-electrode equivalent resistance method):

The sample oftissue is in good contact with the grounded conductive rubber plate, and the special electrodes are clamped to the sample at the specified spacing and pressure, apply voltage after short-circuit discharge, and calculate the equivalent resistance between the electrodes (Ω) according to the current value. When the fabric containing conductive fibers comes into contact with the conductive rubber plate, it will cause a short circuit between the local areas where the conductive fibers are exposed, making it difficult to measure the true equivalent resistance. FZ/T 01044 \"Electrostatic properties of textile materials - Determination of fiber leakage resistance\" and other resistance test methods mainly detect fibers.