This product is based on the test principle of water vapor transmission of cup method, according to ASTM E96, GB/T 1037 standard design and manufacture, for low, medium, high water vapor barrier materials to provide a wide range, high efficiency water vapor permeability test.
It is suitable for testing the water vapor permeability of film, sheet, paper, fabric, non-woven fabric and related materials in the fields of food, medicine, medical instrument, daily chemical and so on.
Test philosophy
Desiccant in the sample cup (weight gain method) or water (weight loss method); Seal the sample cup with the sample and place in the test box; Control test box temperature, humidity, wind speed; The humidity difference between inside and outside the sample cup drives water vapor to permeate the sample, and the mass of the sample cup increases or decreases; The mass of the sample cup was weighed regularly to calculate the performance parameters such as water vapor permeability of the sample.
Standard
ASTM E96, ASTM D1653, ISO 2528, TAPPIT464, DIN 53122-1, YBB00092003