Composite packaging bags can be seen everywhere in daily life. The packaging bags used to hold snacks, candy and biscuits in supermarkets are all packed in composite bags. Many food manufacturers often encounter bag separation when using composite bags. Today, the new Runlong packaging manufacturer will analyze why these bags are separated.

1： Delamination caused by improper material of composite bag
Many manufacturers believe that all bags are made of the same material. In fact, that is not the case. The material of the packaging bag varies according to the different characteristics of the product. Some products have high oil content, some products need high temperature treatment, and some products need low temperature treatment. It is refrigerated, so it is common for the bag to delaminate due to incorrect material selection.

2： Layer separation caused by failure of composite bag technology
The composite plastic bag is a packaging bag composed of more than two layers of materials, which we professionally call: composite bag. These materials are bonded together by a special process. If the technology is not good enough, the amount of glue used in the compounding process will affect the separation of bags in the future.

3： The curing time of composite bag is not enough
After the composite bag is compounded, the composite material shall be baked in an environment with a constant temperature of 50 ° C. The baking time must reach 48 hours. The purpose of baking is to bake the glue during the compounding process. In order to reduce production time, some manufacturers take it out to make bags before they are fired. This bag will definitely delaminate after a period of time.