Based on the characteristics of sensor method and vacuum method, this article gives packaging enterprises, testing institutes and research institutes some suggestions on how to select gas permeability test methods. Continue reading
It is argued in this article that due to the reverse transmission of nitrogen gas in equal-pressure method, there is essential difference between differential-pressure method and equal-pressure method in terms of test principle. Continue reading
This article reviews the parameter definition as well as the development of test methods concerning water vapor permeability testing. Continue reading
Based on its introduction to the definition of traceability and the source of referential material in gas permeability testing methods, this article discusses the fundamental position of differential-pressure method in gas permeability testing. Continue reading
Based on test principles of desiccant method and water method, this article analyzes differences of these two methods. It also discusses advantages and disadvantages of these two methods according to the development requirement of gravimetric method. Continue reading