it should be that the sealing strength is not enough. The reasons for the insufficient sealing strength are: 1. The temperature of the ironing knife is low or the pressure is low. 2. The temperature of the ironing knife is too high and the film is burned out.
you can see the opening state of the film. If it is a destructive crack, it is the second reason, otherwise it is the first reason
if you want to know about electrical appliances (price, warranty, after-sales, safety issues and other precautions), you can go to Santo electrical appliances. There is an electrical encyclopedia on it, which can help you.
the automatic seal is the middle seal type. In this way, the specific material structure thickness and content crack can not be answered at the moment. Where is the film itself cracked or the heat seal cracked
two points 1 Your middle seal is not sealed. Check whether the temperature of the temperature controller is normal, whether the heating pipe is heated, whether the pressure of the middle seal wheel is enough, whether it is tight, and whether the packaging film can come up in the middle seal
2. Is the packaging film small and the material large