Standard methods for measuring the permeability of oxygen and carbon dioxide gas and water vapor through flat polymer structures are described in ASTM D 3985-81 and E 96-80, respectively. Continue reading
This article take the Labthink s VAC-V1 Gas Permeability Tester as an example to show us a method of acquiring those two parameters and also tell us some remarkable points. Continue reading
Barrier parameter is usually hard to acquire at special temperatures. This article mainly tell us a concept of permeability parameters data fitting and relative theoretical principles. Continue reading
It introduces the main characteristics and reasons of Low Permeability Materials by analyzing the objective factors of test methods, instruments, and test temperatures. Continue reading
When temperature become higher, the movement of gas molecule will be acuter, diffusion coefficient will be higher. Permeability coefficient has a direct ratio with film transmission rate . Continue reading