| 1. Characteristics
It is applied to air block and gas permeability test of all kinds of flexible packaging materials such as films, foils, complex films and other plastic filmy materials. It is an indispensable testing instrument in packaging material testing, choosing and researching work.
2. Principle
Keep certain pressure difference between two sides of the specimen under definite conditions of temperature and humidity. Calculate the mass and rate of gas transmission by testing the change of pressure in the lower pressure side.
3. Test procedure
The relationship between pressure and time will be displayed on the screen of the computer in real time after test is started and permeation time will be calculated automatically according to permeation ratio. Test will stop when intervened by users or test results are up to the default. The system will decide whether to print test results or operate other data process according to users.requirements.
4. Standard
GB 1038, ASTM D1434, ISO 2556
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