Weifang Best Package Products Co., Ltd.
Self sealing bag is a type of packaging bag that can be automatically sealed by compression
2024-10-12
Self sealing bag is a type of packaging bag that can be automatically sealed by compression. Common types include compact bags, dragon bone bags, zipper bags, etc.
Self sealing bags (also known as compact bags, adhesive bags, sealed bags, zipper bags, or keel bags) are a type of plastic bag that can be repeatedly sealed. They are made by blowing polyethylene (LDPE) and high-pressure linear polyethylene (LLDPE) into shape and using a heat cutting mechanism. Common materials include PE/PO/EVA, multi-layer composite zipper bags, etc.
There are two types of production for clamp chain self sealing bags. One is direct blown film molding. The thickness above the self sealing is generally 1.8cm, and the thickness near the self sealing is relatively thick. The left and right sides of the self sealing bag are sealed by hot cutting to form finished products; Another method is to attach a chain at the back, which is mainly used in the production of composite bags.
The production of self-adhesive self sealing bags mainly adopts a single film cross cutting method, heat sealing on both sides, and the length of the bag on both sides is different. One side is 3-5cm longer than the other and can be folded back. The folded back part is pasted with adhesive, destructive glue and other colloids. When using, the plastic cover on the colloid can be torn off and folded back to seal the bag.
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