In recent years, people have a stronger love for outdoor nature. Picnics and camping have also become a new social activity. However, due to the changeable weather, it is often unknown when the rainstorm will come. Therefore, the waterproof "equipment" for outdoor activities must be included, such as umbrellas, waterproof clothes, boots, tents.

Therefore, the waterproof performance of textiles is particularly important.

Through waterproof finishing, textiles can obtain waterproof performance. Fabric waterproof finishing is divided into water repellent finishing and hydrostatic finishing.

How to evaluate the waterproof performance of textiles?

Principle: According to the different uses of the product, the main evaluation indicators at present are the level of wetness, the amount of water penetration and the level of anti-hydrostatic pressure.

1. Water test (spray method)

Principle: install the sample on the annular holder, keep the holder at 45 ° to the horizontal, and the center of the sample is a certain distance below the nozzle. Spray the sample with a certain amount of distilled water or deionized water. After spraying, the water staining grade of the fabric is determined by comparing the appearance of the sample with the description of the water staining phenomenon and the pictures, and the waterproof performance of the fabric is evaluated.

AVENO related machine: AG20 Spray Rating Tester

2. Rain test

Principle: a piece of absorbent paper with known weight is placed on the back of the test sample. After continuous watering for a specific time, the weight change of the absorbent paper is weighed to measure the water trafficability. The test method is divided into horizontal spray rain test and top-down impact penetration test.

AVENO related machine: AG22 &AG22-2 Rain Tester

3. Hydrostatic test

Principle: one side of the sample is subject to rising water pressure until three water seepage occurs on the other side, and the water pressure data is recorded.

AVENO related machine: AG17 &AG17B Hydrostatic Head Pressure Tester