评估包装气密性的抽气法--应用于加热烟草制品 *

Zhihao Chen, Zhandong Shi, Pengfei Zhang, Li Ding, Qing Zhang, Zhigang Li, Miao Sun, Chao Ye, Hao Wang, Xiaosong Wu, Dong Li
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摘要

摘要 加热烟草制品(HTP)包装的气密性是产品质量的一个非常重要的指标,在调制过程中也非常重要。基于恒定抽气配置下的气压差,开发了一种气密性评估方法。这种方法的基本特征是在放气过程中利用热塑性硫化弹性体包装内外的压力差来表征热塑性硫化弹性体包装的密封质量。本文介绍了详细的设置、原理和测定过程。评估了该方法的准确性和可重复性,还研究了气密性对调节过程的影响。事实证明,所开发的方法是可靠的,标准偏差小于 0.09 kPa,重复性小于 0.30 kPa。此外,研究还发现,虽然高温热塑性塑料与大气之间的湿气传输不能完全被包装所阻止,但气密性在调节过程中仍起着重要作用,尤其是当气密性处于相对较低的水平时(例如,在 200 mL/min 的泵送流速下低于 1.5 kPa)。该方法为评估和监测 HTP 包装的密封质量提供了一种可行的方法,建议在 200 mL/min 的泵送流速下,包装的气密性不应低于 2 kPa。[Contrib. Tob. Nicotine Res.
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A Pumping Method for Assessing Airtightness of Packs - Application to Heated Tobacco Products *
SUMMARY The airtightness of heated tobacco product (HTP) packs is a very important indicator for the product quality and is also of great importance during the conditioning process. A method for evaluation of the airtightness was developed based on the air pressure difference in a constant pumping configuration. The essential feature of this method is that the pressure difference between the inside and the outside of the HTP packs during the deflation process is used to characterize the sealing quality of HTP packs. The detailed setup, the principle as well as the determination procedure are described. The accuracy and the repeatability of the method were assessed, and the effect of airtightness on the conditioning process was also investigated. The developed method is proven to be reliable with a standard deviation less than 0.09 kPa and repeatability less than 0.30 kPa. In addition, it was found that, although the transmission of moisture between HTPs and atmosphere could not be entirely prevented by the packs, airtightness still plays a significant role during the conditioning process, especially if the airtightness was at a relatively low level (e.g., lower than 1.5 kPa under a pumping flow rate of 200 mL/min). The method provides a promising way to assess and monitor the sealing quality of HTP packs, and it is suggested that the airtightness of the pack should not be lower than 2 kPa under a pumping flow rate of 200 mL/min. [Contrib. Tob. Nicotine Res. 32 (2023) 140–145]
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