Self-supporting zipper bags are generally composite soft 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 a variety of packaging advantages, with low cost and exquisite printing. The product has the characteristics of anti-static, anti-ultraviolet, moisture-proof, oxygen shading, cold resistance, oil resistance, high temperature resistance, preservation, and strong oxygen barrier.

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

Types of self-supporting zipper bags

Ziplex bag refers to a free-standing zipper bag that does not use any tools. There are clip chain self-sealing bags, self-adhesive self-sealing bags, etc.

Chain clip self-sealing bag (also known as tight bag, composed of any bag, sealed bag, chain clip bag, bone bag, English: zipper bag, foldable bag, zipper closed bag, resealable bag), a plastic bag, Can be re-sealed by blow molding polyethylene (LDPE) and high-pressure linear polyethylene (LLDPE) and making bags by hot pressing. Commonly used materials are PE, EVA, pet, composite bags, etc.

There are many types of self-adhesive sealed bags that use a single sheet of film to cross-cut and fold, heat seal on both sides, and then glue on one side of the bag. Commonly used materials include OPP self-adhesive, express bag (multi-layer co-extruded film), PP, PVC, etc.

The commonly used production materials for free-standing zipper bags are mainly 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, adding a small amount of lubricants, aging agents and other additives. Polyethylene is an odorless, non-toxic, Milky White waxy solid. Production of packaging bag surface gloss and transparency is not high, good plasticity.

1. Good barrier performance: effectively prevent water and moisture immersion, but the barrier to air is not very good.

2. Strong chemical stability: no reaction with acid and alkali at room temperature, but poor oil resistance.

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

4. High temperature resistance, low temperature resistance: good low temperature resistance, can be used for food refrigeration, but poor high temperature resistance, can not be high temperature cooking.

5. Health and safety: in line with food safety standards, direct contact with food.

Self-supporting zipper bag PP polypropylene: the main component is polypropylene resin, with high gloss and transparency. Heat sealing performance is worse than PE, but better than other plastic materials.

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

2. Health and safety is higher than sports

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