Air Permeability Tester test principle and implementation standards

Air Permeability Tester is widely used in food, medicine, packaging, plastics, industry, electronics, energy and other industries, suitable for plastic films, composite films, paper-plastic composite packaging, solar back sheets, sheets, composite materials, aluminized films, common Extruded film and other films, aluminum foil, sheet materials, and packaging containers such as bottles, bags, cans, boxes and other materials such as plastic, rubber, paper, glass, and metal.

Test principle:

Place the pre-treated sample between the upper and lower test chambers and clamp them. First, vacuum the low-pressure chamber (lower chamber), and then vacuum the entire system. When the specified vacuum degree is reached, close the lower test chamber. Fill the high pressure chamber (upper chamber) with a certain pressure of test gas, and ensure that a constant pressure difference (adjustable) is formed on both sides of the sample, so that the gas will move from the high pressure side to the low pressure side under the action of the pressure difference gradient Permeation, by monitoring the internal pressure of the low pressure side, various barrier parameters of the tested sample are obtained.

 

Executive standard:

ISO 2556-2001 Plastics. Determination of gas transmission rate of films and sheets at atmospheric pressure, ISO 15105-1 Plastics. Films and sheets. Determination of gas transmission rate, GB/T 1038-2000 This standard specifies the determination of plastic films and Test Method for Gas Transmission Rate and Gas Transmission Coefficient of Sheets. This standard applies to the determination of air or other test gases.

 

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