Types and production materials of self-standing zipper bags

Self-standing zipper bags are generally composite flexible packaging, composed of polypropylene OPP, polyester PET, nylon, matte film, aluminum foil, cast polypropylene, polyethylene, kraft paper and even woven bags. It is a packaging product that integrates multiple packaging advantages, with low cost and beautiful printing. This product has the characteristics of anti-static, anti-ultraviolet, moisture-proof, oxygen-blocking and shade-proof, cold-resistant, oil-resistant, high-temperature resistant, fresh-keeping, and strong oxygen-blocking properties.

Self-standing zipper bags are widely used in industrial packaging, daily chemical packaging, food packaging, medicine, health, electronics, aerospace, technology, military industry and other fields.

Types of self-standing zipper bags

Ziplock bags refer to self-standing zipper bags that do not use any tools. There are ziplock ziplock bags, self-adhesive ziplock bags, etc.

Ziplock bags (also known as ziplock bags, consisting of arbitrary bags, sealed bags, zipper bags, bone bags, English: zipper bags, foldable bags, zipper seal bags, resealable bags), a plastic bag that can The bag is resealed by blow molding polyethylene (LDPE) and high-pressure linear polyethylene (LLDPE) and pressing it through a heat press. Commonly used materials include PE, EVA, PET, composite bags, etc.

There are many types of self-adhesive sealing bags that use a single piece of film to be folded crosswise, heat-sealed on both sides, and then glued to one side of the bag. Commonly used materials include OPP self-adhesive, express bags (multi-layer co-extruded film), PP, PVC, etc.

Commonly used production materials for self-standing zipper bags include PE polyethylene, PP polypropylene, PS polystyrene, etc. Different materials have different characteristics and should be selected according to the characteristics of the food itself.

Polyethylene: Mainly composed of polyethylene resin, with a small amount of lubricant, aging agent and other additives added. Polyethylene is an odorless, non-toxic, milky white waxy solid. The surface gloss and transparency of the produced packaging bags are not high, but the plasticity is good.

1. Good barrier properties: It can effectively prevent water and moisture from infiltrating, but its barrier properties against air are not very good.

2. Strong chemical stability: It does not react with acid and alkali at room temperature, but has poor oil resistance.

3. Mechanical properties: good tensile strength, tear strength and flexibility.

4. High temperature resistance and low temperature resistance: It has good low temperature resistance and can be used for food refrigeration, but has poor high temperature resistance and cannot be used for high temperature cooking.

5. Hygiene and safety: complies with food safety standards and can be in direct contact with food.

Self-standing zipper bag PP polypropylene: The main component is polypropylene resin, which has high gloss and transparency. The heat sealing performance is worse than PE, but better than other plastic materials.

1. The barrier performance is better than that of PE, and the strength, hardness and stiffness are higher than that of PE;

2. Health and safety come before sports

3. It has excellent high temperature resistance and can be used for a long time at temperatures of ~ degrees Celsius, but its low temperature resistance is worse than PE. Its performance becomes fragile when the temperature reaches -17 degrees Celsius.

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