Weifang Best Package Products Co., Ltd.
A self-sealing bag is a packaging bag that can be automatically sealed by pressing. Common types include airtight bags, bone bags, and zipper bags.
Self-sealing bags (also known as airtight bags, adhesive bone bags, sealing bags, zipper bags, bone bags, English: Ziplock bags, Reclosable Bag, Sealing bag, Zipper Closure Bag, Bone bag) are made of polyethylene (LDPE) and high-pressure linear polyethylene (LLDPE) blown film, heat-cut bag making, made of a resealable plastic bag. Common materials include PE\PO\EVA, multi-layer composite zipper bags, etc.
There are two types of zipper self-sealing bag production. One is direct blown film molding, generally 1.8CM above the self-sealing opening. The self-sealing opening is relatively thick. The left and right sides of the self-sealing bag are made into finished products by heat-cutting and sealing; the other is the method of attaching a zipper strip later. The latter method is mainly used for the production of composite bags.
The production of self-adhesive self-sealing bags mainly adopts single-sheet film cross-cutting, heat sealing on both sides, and the front and back lengths of the bag are different. One side is 3-5cm longer than the other side and can be folded back. The folded back part is pasted with self-adhesive, destructive adhesive and other colloids. When using, tear off the plastic cover on the colloid and fold it back to seal the bag.
Key Words
PE plastic self-sealing bag
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