A method (Half-Life method): The +10kv high pressure on the selected metal platform on the sample discharge 30s, the measurement of the half-life of the induction voltage (s). fz/t 01042-1996 "Determination of electrostatic high voltage half-life of textile materials" is identical to the same. This method can be used to evaluate the characteristics of fabric electrostatic decay period, however, the contact condition of the sample with conductive fiber on the grounding metal platform can not be controlled, the conductive fiber and the platform contact with good charge rapid leakage, and when the contact is poor, its attenuation rate is similar to that of ordinary textiles, the same specimen under different placement conditions of the test results are very different, Therefore, it is unsuitable for the evaluation of conductive fiber fabrics. Japan 1997 revised JISL 1094 "test method for the performance of Live and び objects".
Specific provisions in the text indicate that this method is not suitable for the evaluation of antistatic properties of fabrics containing conductive fibres. B Method (frictional charged voltage method): sample (4, 2, 2 weft, size 4㎝x8㎝) folder placed on the drum, the drum to 400r/min speed and standard cloth (nylon or polypropylene) friction, test 1min of the maximum voltage of the sample charged (V). In addition to the abrasive specifications, the number of samples, such as slightly different, fz/t 01061-1999 "fabric friction from the electrical voltage determination method" is the same. This method is due to the size of the specimen is too small for the woven conductive fiber fabrics.
The distribution of conductive fibers will vary greatly depending on the location of the sample, so it is suitable for testing and evaluating the antistatic properties of textiles containing conductive fibers. C Method (Charge surface density method): The specimen under the specified conditions in a specific way with the nylon standard cloth after friction with the measurement of the amount of charge, according to the size of the sample to obtain the charge surface density (μc/m2). In addition to the friction cloth specifications, sample pretreatment, friction rod diameter, friction times and other aspects of a slight change, fz/t 01061-1999 "fabric friction belt point charge density Determination method" is the same. The charge surface density method is suitable for evaluating the difficulty of electrostatic accumulation of various fabrics, including conductive fiber fabrics, and the results are closely related to the degree of absorption of the samples.
Since the friction between the sample and the standard cloth is realized by manual operation, the consistency of test conditions, the accuracy of test results and the effect of repetition are easy to be affected by manipulation. D method (clothes with the use of the method of stripping): In a specific way will work clothes and chemical fiber underwear after rubbing off overalls, into the Faraday cylinder, to obtain charged amount (μc/pieces).
The test object of this method is limited to the clothing, and the underwear material is not stipulated, the friction technique is difficult to be consistent, lacks the comparability. E method (uniform friction with the electricity method): With the lining of nylon or polypropylene standard drum drying device (45r/min above) on the work of the test specimen friction starting 15min, input Faraday tube to measure the amount of live work (μc/pieces).
This method and the "electrostatic overalls" product standard GB/T 12014-2009 of the charge measurement method is basically consistent, suitable for the friction tape of clothing test; its technical essence and C method (charge surface density method) also coincide. F Method (polar equivalent resistance method): Fabric specimen and grounding conductive offset good contact, according to the specified spacing and pressure of the special electrode clamp on the sample, after the short circuit discharge voltage, according to the current value to obtain the equivalent resistance (Ω). When the conductive fiber fabric is contacted with the conductive adhesive, it will cause the short circuit between the local areas exposed by the conductive fiber and it is difficult to measure the true equivalent resistance.
fz/t 01044-1996, "Textile materials electrostatic properties of fiber leakage resistance measurement" testing methods such as the main test object for the fiber. fz/t 01059-1999 "fabric friction electrostatic adsorption method" to the fabric by the specified method of friction adsorption on the metal bevel, according to the adsorption time to evaluate the fabric antistatic properties. This method is simple and suitable for reflecting the body level of the fabric by electrostatic absorption. However, the results of the test are too large, which is a simple test method.
For fabric specimens containing conductive fibres, the uncertainty of the contact state of the metal in the exposed conductive fibers will also result in instability of the test results. December 1, 2009 began the implementation of the GB 12014-2009 instead of the GB 12014-1989成 for the new anti-static clothing GB.