What is the reason why the aluminum foil bag is not easy to seal the edge?

January 13, 2023

hxpacking hxpacking

The edge sealing problem of the aluminum foil bag, the temperature of the ironing knife is high, the edge sealing is wrinkled, and the temperature is low and it cannot be sealed. The pressure has been adjusted, and the silicone pad and raw materials have also been changed, but it still can’t be solved. What can I do?Answer: Consider it from two aspects, one is that the edge is wrinkled, and the other is that it cannot be sealed.For edge wrinkling, the reasons are usually: 1, because there are too many residual solvents in the glue and ink, and the food packaging bags accumulate and volatilize during the sealing and ironing process, resulting in bubbles and wrinkling; 2because the material is not temperature-resistant enough, and the material wrinkles after the corn bag is sealed at high temperature; 3, the glue and ink are not temperature-resistant enough; 4, is the parallelism of the heat-sealing knife of the bag making machine, the hardness and flatness of the silica gel do not meet the heat-sealing requirements, and there are foreign objects on the heat-sealing knife.For problems that cannot be sealed, the reasons are usually: 1, The heat sealing knife temperature is too low and the pressure is too small. 2, The quality of the vacuum packaging bag heat-sealing material, the sealing temperature is too high, or the heat-sealing performance is unstable.

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