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Zipper bag production need to pay attention to what issues?

- Jan 17, 2018 -

In the zipper bag processing often encounter the following four types of problems:

1, the zipper and the bag seal the site is not smooth;

2, the zipper and bag body seal the phenomenon of partial delamination;

3, the zipper at both ends of the bag and the edge of the cross-seal site appears "dead fold";

4, the two ends of the zipper and bag edge sealing cross-section of the local delamination phenomenon.


1, zipper thermal shrinkage rate is greater than the thermal shrinkage of composite films;

2, the melting point of the zipper itself is greater than or equal to the melting point of the heat seal film;

3, the zipper on the child button section is too large;

4, zipper bag making machine on the local seal design is not reasonable, it is recommended to use ultrasonic heat sealing device;

5, partial heat seal head design is not reasonable (too small);

6, ultrasonic heat sealing device output power shortage or lack of pressure;

7, Insufficient ink layer heat resistance;

8, silicone rubber pad hardness is not appropriate.