透气性测试设备所使用的方法大都可归为压差法和等压法两类,它们的测试原理不同,测试条件差别较大,但在阻隔性测试领域中都占有重要的地位。包装材料的透氧性直接影响被包装物的保存质量和保存时间,是最受关注的性能指标之一,通常进行的材料透气性检测也主要是针对材料的透氧性 Most of the methods used in the air permeability testing equipment can be classified as pressure difference method and isobaric method. Their testing principles are different and their testing conditions are quite different. However, they all occupy an important position in the field of barrier testing. Oxygen permeability of packaging materials directly affect the preservation of the quality and storage time of the package, is one of the most watched performance indicators, the material permeability testing is usually carried out mainly for the material oxygen permeability