The self-supporting zipper bag is a very high-end and particularly popular product in the flexible packaging category. It has the advantages of easy access and reuse. As far as the production process of flexible packaging manufacturers is concerned, the probability of folding of self-supporting zipper bags is very high. How can this phenomenon happen? The following will take you to understand why the self-supporting zipper bag will wrinkle, to the reason for the channel to find a solution.

There are two kinds of folds of self-supporting zipper bags: one is the local layering or surface folds on both sides of the zipper; the other is the surface folds at the seal between the zipper and the bag body.

The cooling condition in the self-supporting zipper bag is also one of the reasons for the fold of the self-supporting zipper bag. If the composite film and zipper of the self-supporting zipper composite bag that has been bagged are still in a viscoelastic state, it is very likely that the self-supporting zipper composite bag will shrink during storage and produce folds.

The folds at both ends of the self-supporting zipper bag are related to the melting point of the zipper itself. When the self-supporting zipper composite bag is heat sealed, the zipper and the plastic film are heat sealed in the same environment. It is necessary to pay attention to the melting point and shrinkage rate of the zipper, which should be lower than or equal to the melting point of the composite film and the shrinkage rate of the composite film heat sealing layer to reduce the probability of wrinkling of the self-supporting zipper composite bag.

Refrigeration standard is one of the key factors in the whole bag making process. If the deformed zipper can be fully cooled before the bag making process is completed, the probability of the self-supporting zipper bag that has completed the bag making process will shrink again under the storage standard will be greatly reduced. If the sealing layer and its zipper in the bag after the production and processing of the bag are still in a molten state or a viscoelastic state, then under the storage standard, the sealing layer and its zipper will definitely produce a certain heat-shrinkable film feeling, further causing relatively horizontal surface wrinkles. Therefore, the cooling surface temperature of the bag making machine has become one of the key factors that endanger the appearance quality of the self-supporting zipper bag.

The main advantage of the zipper bag is that it can increase the display effect of the shelf and is convenient for users to use. It is a relatively new modern packaging form, which has great advantages in improving product quality and video effect, and is an ideal packaging product.

Zipper bags are widely used, such as beverage packaging, condiment packaging, tea packaging, dry goods series packaging, leisure packaging, etc. This is a new type of packaging. Not only food, some washing supplies, daily cosmetics, medical supplies are also widely used.

In recent years, the application of self-supporting zipper bags in candy and other snack foods has been heating up. As early as a century ago, the market was popular with the idea that resealable bags were "a modern way to satisfy the desire for quantity control". "Resealable bags also provide sharing, small amounts and portability. These are big trends for today's consumers".