How To Avoid Wrinkles in Self-supporting Zipper Bags

Zipper bags are the most common bag type in food packaging, with advantages such as easy to take and repeated use.

However, compared with ordinary packaging, zipper bags have an additional production process, so the production difficulty is relatively greater, and zipper bags have higher requirements for production technology.

Zipper bags are prone to wrinkles due to various factors such as heat sealing temperature, heat sealing time, glue, etc. So how should this problem be avoided?

Pay attention to the selection of zippers: the material, size and specifications of the zipper need to match the material, size and specifications of the plastic bag. If the material of the zipper is thicker or the size is smaller, wrinkles may occur.

Control the heat sealing temperature: When heat sealing zippers and plastic bags, control the heat sealing temperature to avoid too high or too low temperature. Too high temperature may cause the plastic bag to melt, while too low temperature may not be completely heat sealed, resulting in wrinkles.

Pay attention to the heat sealing time: too short heat sealing time may also cause wrinkles, so make sure that the heat sealing time is long enough to ensure the heat sealing strength.

Keep it flat: When storing and using plastic zipper bags, try to keep the bags flat to avoid wrinkles.

Choose the right plastic material: Different plastic materials have different heat sealing properties and temperature resistance, so it is necessary to choose the right plastic material according to actual needs to reduce the probability of wrinkles.