Auto Water Vapour Permeability Tester TF165B
Water Vapour Permeability Tester, is to determine the water vapour permeability of various textile and garment fabric, coating fabric, composite, sportswear and industrial fabrics. This Vapour permeability testing machine is also suitable for conducting the Moisture Vapor Transmission Rate Test of medical protective clothing.
Water Vapour Permeability Tester, is to determine the water vapour permeability of various textile and garment fabric, coating fabric, composite, sportswear and industrial fabrics.
This Vapour permeability testing machine is also suitable for conducting the Moisture Vapor Transmission Rate Test of medical protective clothing.
This tester is equipped with touch panel to program and control the test.
Features of Auto Water Vapour Permeability Tester
- Airflow speed: 0.1 ~ 0.8 m/s
- Temperature: 18 ~ 50°C ± 0.5°C
- Humidity: 40% ~ 95%
- Power: 220 V 50/60 Hz 4500 W
- Weight: 320 Kg
- Dimensions: 880 x 700 x 1760 mm (L x W x H)
- ASTM E96: Standard Test Methods for Water Vapor Transmission of Materials
- GB/T 12704: Textiles-Test method for water-vapor transmission of fabrics-Part 1: Desiccant method
- JIS L1099
What is Water Vapour Permeability of Fabric?
Water vapour permeability definition: In general, there is a water vapor pressure difference between the front and the back of the fabric, so the water vapor diffuses from the high-pressure air side to the low-pressure air side through the fabric. The water vapour permeability of fabric refers to the difficulty degree of water vapor passing through the fabric. The water vapour permeability of fabric is an important index to measure the comfort of clothing. Due to the difference of clothing environment, it is necessary to choose the appropriate water vapour permeability test method.
The Principle of Water Permeability Test
A test specimen is sealed over the open mouth of a test dish which contains water, and the assembly is placed in a controlled environment. Following a period of time to establish equilibrium of the water vapour pressure gradient across the sample, successive readings of the assembled dish are made and the rate of water vapour permeation through the specimen is calculated.
How to Calculate Water Vapor Transmission Rate?
The water vapour permeability index is calculated by expressing the water permeability of textiles as a percentage of the water vapour permeability of a reference fabric which is tested in a water vapor permeability test. After the water permeability test for fabric, the water vapour permeability of the fabric can be obtained according to the water vapor permeability unit conversion and the water vapor permeability formula.
Water Vapour Permeability Test Method
Here are five standards test methods for water vapor resistance, they were the ASTM E96 upright and inverted cup test, the Japan JIS L1099 desiccant inverted cup test, the dynamic moisture test and the sweating hot plate test.
The results of upright cup test are similar to those of clothes worn in static or small amount of motion, the results of desiccant inverted cup method are similar to those of human body under intense exercise, and the sweating hot plate test is to simulate the water vapour permeation process of fabric clinging to human skin.
The experiment is affected by the test method and the test condition, and the result deviation is large, so it is necessary to select a suitable water vapour permeability test method according to the environment of the products. You will get a more detailed water vapour permeability test procedure if you buy our water vapor permeability tester, please contact us quickly.
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A: Water Vapor Permeability (Breathability) is the ability of a fabric to allow moisture vapor to be transmitted through the material. It is an essential contributing property to thermal and Physiological Comfort clothing, and is vital in filtration and medical textiles.
Q: What is water vapor transmission rate testing (water permeability test for fabric)?
A: This blog concludes more information about water permeability. You can find it here.