Mask在包装材料气体阻隔性能检测中的应用研究

Application of Mask in the Gas Permeability Test of Packaging Materials

中文关键词: mask  包装材料  阻隔性  气体渗透性  氧气透过率  等压法

英文关键词: mask  packaging materials  barrier performance  gas permeability  oxygen transmission rate  equal pressure method

中文摘要:

      目的 研究和评价mask在材料气体阻隔性检测中的应用及其检测数据的重复性、准确性和数据稳定性。方法 选用覆盖高阻隔、中阻隔、低阻隔等阻隔性能范围的5种样品，使用3种不同面积的mask和仪器测试腔原有面积对样品进行测试，并对测试结果重复性、稳定性和准确性进行分析评价。结果 高阻隔材料PET硬片使用面积12.56 cm²的mask测试时，可以得到较为稳定的检测结果，而在使用更小面积(1.77、5 cm²)的mask时，测试结果的相对标准偏差、相对极差和测试数据偏差都较差，不推荐使用。KOP/CPP在使用1.77 cm²的mask测试时，测试结果相对标准偏差和测试数据偏差都略大于10%。PET/CPP在使用1.77 cm²的mask测试时，其测试数据偏差略大于10%。BOPE/LDPE和TPU使用1.77 cm²的mask测试可以得到良好的检测结果。结论 Mask是解决试样材料特性、设备量程限制、试样尺寸等测试困难的优秀解决方案。对于中、低阻隔材料的透气性测试，使用mask可获得具有良好可信度和稳定性的测试数据。而在进行氧气透过率的测试时应尽量选择大的测试面积。小面积mask不适用于高阻隔材料的气体阻隔性测试。

英文摘要:

      The work aims to study the application of mask in the gas permeability test of materials, and evaluate the repeatability, accuracy and data stability of the test data. Five kinds of samples covering the barrier performance range of high barrier, medium barrier and low barrier were selected and tested by three masks with different areas and the original area of the instrument testing cavity and the repeatability, stability and accuracy of the test results were analyzed and evaluated. When the mask of 12.56 cm2 was used for the high barrier material PET sheet, relatively stable test results could be obtained, while when the masks of 1.77 cm2 and 5 cm2 were used, the relative standard deviation, relative range and test data deviation of the test results were poor. It was not recommended to use 1.77 cm2 and 5 cm2 masks for OTR test of the PET sheet. When KOP/CPP was tested with the mask of 1.77 cm2, both the relative standard deviation and the deviation of test data were slightly greater than 10%. When PET/CPP was tested with the mask of 1.77 cm2, the test data deviation was slightly greater than 10%. Good results could be obtained when BOPE/LDPE and TPU were tested with the mask of 1.77 cm2. Therefore, it can be concluded that mask is an excellent solution to solve the test difficulties of sample material characteristics, equipment range limitations, sample size, etc. For the permeability test of medium and low barrier materials, the test data with good reliability and stability can be obtained through application of mask. When the oxygen transmission rate is tested, a large test area should be selected as far as possible. Small area mask is not suitable for gas barrier test of high barrier materials.