阻隔性薄膜透气性能的压差法和等压法测试分析

doi:10.19491/j.issn.1001-9278.2019.07.015

中国塑料 ›› 2019, Vol. 33 ›› Issue (7): 89-95.DOI: 10.19491/j.issn.1001-9278.2019.07.015

阻隔性薄膜透气性能的压差法和等压法测试分析

郭彦峰¹,付云岗²,王思²,张伟²,王思宇³,夏荣厚²

1. 西安理工大学包装工程系
2. 西安理工大学
3. 陕西省产品质量监督检验研究院

收稿日期:2018-12-26 修回日期:2019-02-01 出版日期:2019-07-26 发布日期:2019-07-26
基金资助:
高阻隔性薄膜渗透性的综合影响因素及检测评价方法研究;高阻隔性薄膜渗透性的综合影响因素及检测方法研究

Analysis on Gas Permeability of Barrier Plastic Films by Differential-pressure and Equal-pressure Methods

Received:2018-12-26 Revised:2019-02-01 Online:2019-07-26 Published:2019-07-26

摘要/Abstract

摘要： 利用压差法、等圧法研究了4种阻隔性塑料薄膜的氧气和二氧化碳气体透过量，分析了温度、薄膜类型和厚度、相对湿度对透气性能的影响关系，对比了2种测试方法的薄膜透氧量。结果表明，12 μmPET、12 μmPET/Al、25 μmPET和25 μmPVDC薄膜的氧气、二氧化碳气体的透过量都受温度影响显著，都随着温度的升高而增大，其对数形式与热力学温度的倒数都呈线性关系；这4种阻隔性薄膜对氧气、二氧化碳气体的透过性能都存在明显差异，12 μmPET薄膜的透过量最大，25 μmPET薄膜和25 μmPVDC薄膜次之，12 μmPET/Al薄膜最小，而且它们对二氧化碳和氧气的透过量之比值都超过了4倍，都具有优良的阻隔性能和选择透过性。

Abstract: The gas permeance of oxygen and carbon dioxide for four kinds of barrier plastic films were investigated by a differential-pressure method and/or an equal-pressure method. The effects of temperature, film type and thickness and relative humidity on the oxygen and carbon dioxide gas permeability of the films were analyzed, and the oxygen transmission rates obtained from the differential-pressure method and equal-pressure method were comparatively investigated. The results indicated that there was a remarkable influence of temperature on the oxygen and carbon dioxide gas permeance of PET film with thicknesses of 12 μm and 25 μm, PET/Al film with a thickness of 12 μm and PVDC film with a thickness of 25 μm. These three types of films showed a rise of gas permeance with an increasing of temperature. Moreover, the logarithmic values of gas permeance of the barrier plastic films are linearly relative to the reciprocal of thermodynamic temperature. The gas permeability of oxygen and carbon dioxide for the barrier plastic films are quite different in a descent order of the PET film with a thickness of 12 μm > the PET one with a thickness of 25 μm > the PVDC one with a thickness of 25 μm are smaller > the PET/Al one with a thickness of 12 μm. The ratios of gas transmission rate of carbon dioxide to oxygen for the barrier plastic films are all more than four times compared to the original ones. Therefore, the four types of barrier plastic films all possess an excellent barrier property and permselectivity.

郭彦峰付云岗王思张伟王思宇夏荣厚. 阻隔性薄膜透气性能的压差法和等压法测试分析[J]. 中国塑料, 2019, 33(7): 89-95.

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阻隔性薄膜透气性能的压差法和等压法测试分析

Analysis on Gas Permeability of Barrier Plastic Films by Differential-pressure and Equal-pressure Methods

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