The waterproof performance of fabrics is mainly divided into the performance of fabrics resistant to water wetting and the resistance of fabrics to water penetration. The water-repellent properties of the fabric are characterized by water-drenching grade, hydrostatic pressure-resistant grade, and water penetration. The test methods are mainly divided into the water-drenching method (spray method) and hydrostatic pressure method.

The waterproof performance of the fabric is mainly used in windbreakers, skin clothing, outdoor jackets, medical professional protective clothing, beach life jackets, umbrellas, tents, tarpaulins, etc.

Testing standards for waterproof performance

At present, in daily testing, the most commonly used tests for waterproof performance are the water-dip method and the hydrostatic pressure method. The relevant test standards are as follows:

Method standard of water-dip method (spray method): GB / T 4745-2012, ISO 4920-2012, AATCC 22-2010, JIS L 1092-1998

Instrument:Spray Rating Tester GT-C31

The above-mentioned standard test principle is to mount the sample on a ring-shaped holder, keep the holder at 45 ° from the horizontal, and place the center of the sample at a certain distance below the nozzle. Spray the sample with a certain amount of distilled or deionized water. After spraying, the water level of the fabric was determined by comparing the appearance of the sample with the description of the phenomenon of water staining and the picture.

Method standard for hydrostatic method：GB / T 4744-2013, GB / T 24218.16-2017, FZ / T 01004-2008, ISO 811-1981, ISO 1420-2016, ISO 9073-16-2007E, AATCC 127-2014, JIS L 1092-199

Instrument：Hydrostatic Head Tester for Textile GT-C26A, High pressure-servo Hydrostatic Pressure Test Equipment GT-C26B

The standard test principle of the above standard is to use the hydrostatic pressure on the fabric to represent the resistance encountered by water through the fabric. One side of the sample is subjected to continuously increasing water pressure until water seepage occurs on the other side, and the water seepage condition and pressure value are recorded.

Related Articles>>>Fabric water permeability and waterproof properties