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It’s estimated that approximately 35% of deterioration accidents of food during guarantee period are caused by inferior packaging materials. Meanwhile, about 65% of the food packages are with hidden dangers. Barrier property is one of the key indexes for the evaluation of the properties of packaging materials and shelf life periods of the packed contents. Correspondingly, the barrier property testing of biodegradable packaging material, a newly developed material in recent years, has become a research focus of the packaging quality inspection institutions. This thesis introduces the significance of barrier property testing of biodegradable packaging films, starch-based biodegradable plastics and the complete verification process of its barrier property by Labthink. The thesis hopes to provide guidance for barrier property testing for manufacturers of biodegradable packaging materials. Continue reading

Based on experiences and material characteristics indicated in the barrier property testing for high barrier property materials, this article proposes corresponding operation suggestions for different barrier property testing items and methods, so as to better satisfy the testing demands for high transmission rate specimens with the common barrier property testing instruments. Continue reading

The properties of cigarette packaging materials are the key factors affecting the storage period in relation to the different storing environments. This article analyzes the testing demands of BOPP film (bi-axially oriented polypropylene film), and introduces the tests for several properties of BOPP film, including water vapor transmission rate , flavor protection, coefficient of friction, heat shrinkage and thickness, etc. Continue reading