The paper introduces the definitions, application scope as well as the difference and conversion relationship of 3 permeability parameters (gas transmission rate, permeance and permeability coefficient). Furthermore, it also explains the unclear situations in the international and national standards. Continue reading
This article will explain the relation between differential pressure and barrier properties based on actual testing data. Continue reading
This article elaborates on the maintenance precautions of several permeability testers. Based on specific testing methods and important components of instruments, the focus of maintenance is also discussed. Continue reading
Empirical test data has proved that in gas permeability testing of differential-pressure method, various pressure differences applied on two sides of specimen have no effect on test data of gas permeability testing. Continue reading
This article presents a systematic introduction to GB1037. It is pointed out in this article that GB 1037 is the comprehensive standard for gravimetric method film water vapor permeability testing. Continue reading