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The hydrostatic pressure tester is mainly suitable for tight fabrics. Through dynamic testing, static testing and program testing methods, the test sample is fixed on the test area specified in the standard. The air pressure control provides a certain air pressure in a built-in water tank filled with distilled water. The water tank is connected to a test head. After the test is started, the test pressure is controlled automatically. The test method is that under the standard atmosphere, one side of the sample is subjected to a continuously rising water pressure, and the pressure is recorded at this time until there are three water leaks. The test principle of this standard is to express the resistance experienced by water flowing through the fabric due to the hydrostatic pressure carried by the fabric. The water pressure can be applied from the front or back of the sample.
Thehydrostatic pressure tester is produced by our company Shanghai QINSUN Precision Electromechanical Co., Ltd. Technology Co.,Ltd. independently develops and produces testing equipment with high cost performance and complete after-sales service.
Three methods:
1. Field test
Field tests are expensive and take a long time, usually about six months. During the experiment, the water repellency of the fabric after water-repellent and moisture-permeable finishing is regularly tested to know the durability. Although this method takes a long time and costs a lot, the data obtained from the test is accurate.
2. Laboratory Test
Compared to field testing and simulation testing, laboratory testing costs less, takes less time, and can provide relative results, which is more practical.
3. Simulation test
The simulation test must have an environmental control room. The room is outrest easy with an artificial rain tower, which can drain water from a height of 10 m to the mannequin with a flow rate of 450 l/m³ like a torrential rain. Water droplets with a diameter of about 5 mm are sprayed from 2000 holes on the top at a speed of about 40 km/h, up to 90% of maximum raindrop speed in air. Through adjustment, showers of different degrees can be simulated over an area of approximately 2m. The surface of the mannequin is filled with sensors designed to determine, among other things, the time and location of any water breach. Compared with the field test, this test method greatly shortens the time required and can be completed in a few days, but the cost is relatively high.
