Method for evaluating damp resistance and moisture retention of packages
A technology of moisture retention performance and evaluation method, which is applied in the field of evaluation of moisture-proof and moisture retention performance of packaging. It can solve the problems that it is difficult to quickly and accurately characterize the water absorption and dehydration state of the product inside the packaging, the accuracy of the detection result is not high, and the process is cumbersome. Achieve the effects of short detection cycle, simple operation and simple analysis method
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Embodiment 1
[0033] (1) Sample pretreatment: After removing the BOPP film from the small pack of cigarette samples (note: do not open the cigarette case cover), the samples were subjected to 0h in a low-humidity environment (20±2)% and a high-humidity environment (80±2)%. , 6h, 16h, 24h, 48h, 72h balance treatment;
[0034] (2) Water activity detection: detect the water activity of shredded tobacco by water activity meter;
[0035] (3) Taking the time as the abscissa and the water activity as the ordinate, draw the variation trend of the water activity under different equilibrium humidity and different equilibrium times figure 1 .
[0036] In Example 1, the samples were small cigarette packages using two different inner lining papers, that is, the packaging materials were different and the packaging methods were the same. The experimental results are shown in Table 1 below:
[0037] Table 1 Trendline slope K test results
[0038]
[0039] It can be seen from Table 1 that:
[0040] I...
Embodiment 2
[0043] (1) Sample pretreatment: After removing the BOPP film from the small pack of cigarette samples (note: do not open the cigarette case cover), the samples were subjected to 0h, 6h, 16h, 24h, 48h, 72h balance treatment;
[0044] (2) Water activity detection: detect the water activity of shredded tobacco by water activity meter;
[0045] (3) Taking the time as the abscissa and the water activity as the ordinate, draw the variation trend of the water activity under different equilibrium humidity and different equilibrium times figure 2 .
[0046] In this embodiment 2, the samples are cigarettes packed in two different hard boxes, that is, the packaging materials are different, and the packaging methods are also different. The experimental results are shown in Table 2 below:
[0047] Table 2 Trendline slope K test results
[0048]
[0049] It can be seen from Table 2 that:
[0050] In a low-humidity environment, the K values of the two samples are both less than 0 a...
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