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 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 clip chain self-sealing bags. One is directly blow-molded, with the area above the self-sealing opening generally being 1.8CM. The area near the self-sealing opening is relatively thick, and the left and right sides of the self-sealing bag are made into finished products using heat-sealing. The other method is to attach the clip chain afterwards, which is mainly used for the production of composite bags.
The production of adhesive self-sealing bags mainly involves transverse cutting of single-layer film, heat-sealing on both sides, with different front and back lengths of the bag. One side is 3-5cm longer than the other, allowing for a fold-back portion. The fold-back portion has adhesive, such as destructive adhesive, attached to it. To use, simply tear off the plastic cover on the adhesive and fold it back to seal the bag.
Key Words
PE plastic self-sealing bag
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