Abstract
The air permeability test of food/drug packaging materials such as plastic film and plastic sheet is indispensable in the process of sealing and preservation. During film permeability testing, a constant temperature environment needs to be maintained. In order to obtain satisfactory thermostatic control and reduce the influence of ambient temperature on test results, it is necessary to explore the heat transfer model of the permeability testing device. Firstly, the experimental platform is constructed with a Thermo Electric Cooling as the heat source and a thermometer as the temperature measurement element. Then, the three-dimensional heat transfer model of the food and drug soft packaging material permeability testing device was established, and the analytical solution of the temperature distribution function was obtained. Finally, the simulation and test results show that the proposed model is consistent with the experimental test results, and the model errors caused by the heat insulation or heat dissipation of the device can be ignored. This work provides a theoretical basis for further research on the air permeability test of soft packaging materials.
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