How to Test the Water Resistance of Fabrics?Oct 24, 2025
How to Test the Water Resistance of Fabrics?
Concepts of Water Resistance and Waterproofing
Water Resistance – As commonly referred to in the industry, this term is actually a simplified form of “water-repellent.” The typical process involves adding a hydrophobic compound additive into the liquid tank at the entry of the finishing machine. The fabric is then passed through the tank for padding and drying, allowing the hydrophobic compound to deposit on the fiber surface, thereby achieving water-repellent performance.
Waterproofing – True waterproof fabrics are superior to water-repellent ones in terms of durability and protection. They possess more stable physical and chemical properties, generally resisting washing and long-term use. The real goal of waterproofing is to form an impermeable barrier on one side of the fabric, ensuring a high level of hydrostatic resistance—typically 3000 mm or higher.
To evaluate fabric waterproofing performance, industry-standard testing methods include hydrostatic pressure testing, spray rating testing, and rain testing.
Fabric Waterproof Testing
1. Hydrostatic Head Tester for Textile GT-C26A Digital Hydrostatic Head Tester is used to testing the waterproof properties of fabrics through waterproofing work such as canvas, coated fabrics, hood fabric, tarpaulin, rain-proof fabrics and geotextile.
Standards of Hydrostatic Head Tester for Textile AATCC 127 Option 2, ISO 811, ISO 1420, GB/T 4744, GB/T 9082, FZT 01004 , DIN 53886 ,
EN 20811, EN 13726-3, EN 1734, BS 2823, WSP 80.6, JIS L1092-7.1.1 Method A
2 Spray Rating Tester For Protective Clothing GT-C31 Spray Rating Tester can performs a shower test to determine the resistance of fabric to surface wetting by water. Spraying quantitative distilled water on the specimen (at a 45 degree angle and 150 mm below) with standard nozzle. Then contrast and evaluate the specimen surface with the standard cards.
Standards of Spray Rating Tester For Protective Clothing AATCC 22, ISO 4920
3. Rain Test Chamber GT-F60 This Rain Test Chamber can simulate the water leakage in various environment. It is applicable to test the function of electronic products and automobile parts subjected to the droplets, indirect wind and rain or spray.
Standards of Rain Test Chamber GB 4208, GB10485, GB4942, GB/T 2423.38, GB/T 2424.23, JIS D0203
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