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The importance of the airtightness of the hollow plate and the key factors affecting the airtightness of the hollow plate

by:Qusheng     2021-06-11

The importance of the airtightness of the hollow plate and the key factors affecting the airtightness of the hollow plate

The importance of the airtightness of the hollow plate

Many indicators need to be considered when boarding, such as the barrier of light and gas by the packaging, the size of the headspace, the cost of packaging, the cost of transportation and storage, the convenience of use, the environmental protection of materials, and so on. The tightness determines the quality of the hollow board in the storage of food.

Key factors affecting the sealing performance of hollow plates

Practical experience shows that temperature is a key factor affecting the sealing performance of plastic hollow plates during the manufacturing and subsequent storage and transportation. On the one hand, for the hollow panels that have been manufactured, the ambient temperature still has a non-negligible impact on their sealing properties, because the currently commonly used hollow panel materials are composite films, and some are even made of polymers, metals, Paper is a composite of 3 or more materials, and different materials often have different thermal properties.

When testing the airtightness of the hollow board, we should focus on the impact of environmental temperature changes. It is necessary to control the temperature of the samples for the airtightness test and achieve a certain specified temperature. The actual detection.

The airtightness of the plastic hollow board is a comprehensive manifestation of whether the selected materials match each other and the selected packaging form in terms of mechanical properties, thermal properties, and optical properties. External force, temperature change, light radiation, etc. can directly affect the sealing performance of the plastic hollow board. In addition, some factors may not have a direct impact on it, but it will cause the material strength to decrease, the heat seal layer fastness, and the material Problems such as additive seepage will affect the tightness of packaging materials.

However, it must be noted that the specific impact of each influencing factor on different packaging forms and packaging materials is not consistent. If you want to analyze the actual impact of each influencing factor on the sealing performance of the plastic hollow board one by one , It will greatly increase the workload and cost of the test, so it is difficult for us to take all the influencing factors into consideration in the actual test.

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