In the process of zipper bag processing, we often encounter the following four kinds of problems:
1. The sealing part of zipper and bag body is not smooth;
2. Local delamination occurs at the sealing part of zipper and bag body;
3. The "dead fold" appears at the cross part between the two ends of the zipper and the edge seal of the bag;
4. Local delamination occurs at the intersection of the two ends of the zipper and the edge seal of the bag.
The reasons for the above four types of problems are as follows:
1. The thermal shrinkage of the zipper is larger than that of the composite film;
2. The melting point of the zipper itself is greater than or equal to that of the heat seal film;
3. The cross section of the fastener on the zipper is too large;
4. The design of local heat sealing rod on zipper bag making machine is unreasonable, so ultrasonic heat sealing device is recommended;
5. The design of local heat sealing head is unreasonable (too small);
6. The output power or pressure of ultrasonic heat sealing device is insufficient;
7. The heat resistance of ink layer is insufficient;
8. The hardness of silicone rubber pad is not suitable.
Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, the world's manufacturing city, is a subsidiary of Beite packaging (China) Co., Ltd., with a plant area of 6000 square meters. It is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of domestic advanced production equipment, a scientific and humanized management system and a group of experienced technical personnel For backing, to provide customers with quality products and first-class service.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for the internal and external packaging of food, daily chemicals, electronics, toys, medicine, cosmetics, industrial products and other industries.

We uphold the integrity of cooperation, good quality, good service business philosophy, won the industry's approval, products sold to all over the world; welcome friends from all walks of life to inquire, visit our factory to investigate guidance and business negotiations.