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W3/0120 MVTR Test Equipment is based on the cup method to measure water vapor transmission rate test of plastic films, composite films, sheets and other materials used in medical and other industry.
It conforms to ISO 2528, GB 1037, GB/T 16928, ASTM E96, ASTM D1653, TAPPI T464, DIN 53122-1, JIS Z0208, YBB 00092003
The test can be performanced as follow:
Under a certain test temperature, a constant humidity difference is generated between two sides of the test specimen. The water vapor permeates through the specimen and into the dry side. By measuring the weight changes of the test dish in different time, water vapor transmission rate and other parameters can be obtained