本文件规定了用于改进食品包装的聚合物纳米复合薄膜的特性，包括要测量的阻隔性能。阻隔性能包括气体（氧气）、水蒸气透过率和紫外-可见光透明度。本文件还描述了相关的测量方法。 本文件既不涉及与食品包装有关的安全和健康问题，也不涉及环境问题。

This document specifies characteristics including barrier properties to be measured of polymeric nanocomposite films used for improving food packaging. The barrier properties cover gas (oxygen), water vapour transmission and UV-Vis light transparency. This document also describes the relevant measurement methods. This document addresses neither safety and health issues related to the food packaging nor environmental aspects.