W3/230 Infrared Water Vapor Transmittance Testing System Product Sample

W3/230 Infrared Water Vapor Transmittance Testing SystemSuitable for measuring the water vapor transmission rate of packaging containers such as plastic films, composite films, sheet materials, as well as bottles, bags, etc. made of plastic, rubber, paper, and other materials. By measuring the water vapor transmission rate, the technical indicators for controlling and regulating packaging materials and other products can be achieved.

W3/230 Infrared Water Vapor Transmittance Testing SystemTesting principle:
W3/230 adopts the principle of infrared sensor testing, clamping the pre processed sample between the testing chambers. Nitrogen gas with stable relative humidity flows on one side of the film, and dry nitrogen gas flows on the other side of the film; Due to the presence of humidity gradient, water vapor will diffuse through the film from the high humidity side to the low humidity side; On the low humidity side, the transmitted water vapor is carried by the flowing dry nitrogen gas to the infrared sensor. When entering the sensor, an electrical signal of the same proportion is generated. By analyzing and calculating the electrical signal of the sensor, parameters such as the water vapor transmission rate of the sample can be obtained. For packaging containers, dry nitrogen gas flows inside the container while the outside of the container is in a high humidity state.

Execution standards: ISO 15106-2, ASTM F1249, GB/T 26253-2010, TAPPI T557, JIS K7129