Punched POF shrink film single-piece packaging ceramics
What are the heat-sealing strength of environmental shrink film?
Packaging users not only pay attention to the beauty of the packaged products, but also pay attention to the heat-sealing strength of the packaged products. Because the heat seal strength of the packaged product directly affects the packaging speed, transportation and sales. So let's take a look at the reasons for the heat seal strength of environmentally friendly heat shrinkable film.
1. Heat sealing temperature: The heat sealing temperature directly affects the heat sealing strength of plastic composite packaging products.
2. Heat sealing time: The heat sealing time of the automatic packaging machine or the old bag making machine is determined by the machine speed. In the case where the heat sealing temperature and the heat sealing pressure are constant, the longer the heat sealing time, the stronger the bonding between the heat sealing layers. However, if the heat sealing time is too long, wrinkles and unevenness may occur in the heat-sealed portion of the composite film, which seriously affects the appearance quality of the product.
3. Heat sealing pressure: In order to ensure the heat sealing strength of plastic composite flexible packaging, a certain heat sealing pressure is indispensable. Therefore, the heat sealing pressure is required to be moderate and uniform during the heat sealing process. If the heat sealing pressure is insufficient or uneven, bubbles will be generated in the heat-sealed portion and the welding will be performed, resulting in poor heat sealing.
POF Perforated Shrink Film
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