Self-sealing bags refer to bags that can be sealed automatically without using any tools, such as self-sealing bags with chains, self-sealing bags with self-adhesive, etc.

Chain-clamped self-sealing bags (also known as dense bags, chain-clamping bags, free bags, sealing bags, bone bags) are made of polyethylene (LDPE) high-pressure linear polyethylene (LLDPE) by blowing film hot-cutting machine bags, which can be repeatedly sealed. Common materials are PE, PET, EVA, composite bags, etc.

There are many types of self-sealing bags with self-sealing glue. They are made of single film, cross-cut folded, heat-sealed on both sides, then tested pasted on one side of the bag. The common materials are: OPP self-sealing glue, PP, express bag (multi-layer co-extrusion film), PVC so on.

Self-sealing bags can be used for internal external packaging of various small items. Self-sealing bags made from food-grade raw materials can store all kinds of snacks, tea, seafood, etc. They are waterproof, insect-proof, moisture-proof, prevent things from scattering. Self-sealing bags can also be used in the packaging of clothing other daily necessities, have a wide range of uses. Self-sealing bags can be produced by adding anti-static masterbatch in blown film production, which is generally used in electronic industry.