Abstract
When making food packages from fiber-based, extrusion-coated materials, water vapor transmission rate (WVTR) of the material is one of the key factors defining the shelf life of the product. The WVTR test is commonly a time-consuming procedure that delays progress in project development. In this study, a calculation method for WVTR-determinations was devised that can reduce the amount of testing and thus enhance the speed of research. Furthermore, the effect of atmospheric conditions on the permeation of water vapor through packaging materials is an important factor in view of the use of food packages all over the world. In this study, it was found that the combined effects of both relative humidity and temperature resulted in an almost linearly increasing WVTR as a function of mixing ratio under the given atmospheric conditions.
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