Test principle of hydrostatic pressure resistance tester and its compliance with standards

Hydrostatic pressure resistance index is one of the important indicators of waterproof and breathable fabrics. Hydrostatic pressure refers to the resistance encountered when water passes through fabric. Under standard atmospheric pressure conditions, the fabric is subjected to increasing water pressure until water droplets escape from the back of the fabric. At this point, the measured value of water pressure is static water pressure. water pressure. The more hydrostatic pressure a fabric can withstand, the better its waterproofing or leak resistance. There are different testing methods for different fabric materials.

Test principle:

The sample is fixed on a standard area test area, and the air the compressor will be from 0 to 5 bars. Air is added to a water tank filled with distilled water and water under a certain pressure is applied to thesample. Testing can be performed via dynamic or static methods.

(1) Dynamic method: Determine the sample pressure by testing the pressure when a fixed number of water droplets oozes from one side of the sample which is not in contact with water at a certain rate of pressure increase. Resistance to hydrostatic pressure.

(2) Static method: Determine the resistance to hydrostatic pressure of the material by testing the infiltration of water under a certain hydrostatic pressure and maintaining the pressure on the sample for a certain period of time.

Hydrostatic Pressure Resistance TesterTest Method:

Pressure Resistance hydrostatic tester is generally used for outdoor sports clothing waterproof testing, waterproof fabric testing, liquid permeability and permeability testingblood protective materials of medical protective clothing.

Complies with standards:

GB/T 4744, AATCC 127, ERT 120-1 160-0, BS EN20811/3321/3424, AFNOR G07 - 057, ISO 811, JIS L1092A, JIS L1092.B-a, JIS L1092 B-b, ASTM F903C, ASTM F1670, ASTM F1671, EN 1734, ISO 1420, FZ/T01004

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