Detailed test method of national standard for anti-static shoes
Electrostatic shoes are made of PVC or PU foaming material, which is a sole, is integrated with the upper, and then reinforced on the line. Can effectively discharge static electricity, and form a complete anti-static system together with anti-static clothing. Electrostatic shoes are smart and lightweight, with anti-static EVA in the middle of the sole, which relieves foot pressure and is more soft and comfortable. The fabrics are: PVC leather / leather / leather / canvas / conductive silk / T / C fabric. The finished shoes are beautiful, generous, strong, non-slip, have excellent abrasion resistance (5 times higher than ordinary soles), and are more environmentally friendly. Is the best-selling high-quality electrostatic shoes worldwide.
Anti-static mesh shoes
Features: It can derive the static charge of the human body, and the shoes do not precipitate dust, which can more effectively prevent dust and static electricity.
Applications: electronics, LCD / LCM / LED, semiconductor production, instrumentation, microelectronics, pharmaceuticals, food, etc.
Sole resistance: 10 ^ 6-10 ^ 9Ω.
Available sizes: 34 # -50 # (220mm-300mm).
Material: PU, canvas, anti-static cloth, can be customized according to requirements.
一 、 Instrument
A. The power supply of the test instrument can output a DC voltage of 100V ± 2V. The measurement result can be accurate to within 5%, and it can ensure that the energy consumed on the test sample is not greater than 3W.
The accuracy of the voltmeter and ammeter of the instrument is 2.5, and the range can meet the measurement requirements.
B. The internal electrode consists of steel balls with a total weight of 4KG and a diameter of 5MM. And it must be anti-oxidized before use.
C, the external electrode is a copper plate. Before use, it must be anti-oxidized and washed with ethanol.
Preparation of test samples
A. Sample preparation
Wash the surface of the sole under test with ethanol. Wash the soles with distilled water and allow them to dry under specified conditions. It is forbidden to use organic substances that will cause the soles to corrode and swell and deform. The surface of the sole should not be abraded, the conductive layer with an area of 180 * 40MM should be washed on the cleaned sole, and dried under the specified environmental conditions.
Measurement of resistance value of conductive coating.
的 The device for measuring the resistance value of the conductive coating is composed of three conductive metal pillars, and the radius of the top of the metal pillar is 3MM ± 2MM. The distance between two sides and three blades is 35MM ± 0.2MM. And connected with metal wires. The third pillar is 160MM ± 5MM from the midpoint where the other two pillars are connected, and is insulated from the other two pillars.
Place the coated shoes on the specified metal posts. The forefoot part of the shoe should be placed two pillars 35mm apart, and the heel part should be placed on the third pillar. All three pillars must be in contact with the conductive coating. Then use the specified test equipment to measure the resistance between the three sides of the front three pillars and the third pillar, measuring the circuit principle measurement results, the resistance must be less than 1KΩ.
Three, anti-static shoes test conditions
Environmental requirements: temperature 20 ℃ ± 2 ℃; relative humidity: 30% ± 3%.
A. Leave the test sample under the specified environmental conditions for more than 24 hours.
B. If the test cannot be performed in the specified environment, the test must be completed within 5 minutes after the test sample is removed from the environment.
Fourth, anti-static shoes test steps
Fill the test shoes with steel balls as required (if the upper is not high enough to fit all the conductive steel balls, you can increase the height of the upper with insulating materials). Place the installed test sample of the steel ball on the specified external electrode, and connect the specified DC power supply between the internal and external electrodes for 1 minute. Measuring circuit principle.
Record or calculate the voltage value and current value after reaching the specified time.
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