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The development of packaging bags has gone through four obvious stages: the original packaging bag stage, the large packaging bag stage, and the small packaging bag stage. At present, it has gradually entered a new stage of environmentally friendly (green) packaging bags. With the development of the commodity economy, the commercial nature of the packaging itself has become more and more significant. It has become a special product that is no longer dependent on the production of commodities, a widely used product that all commodities cannot do without. Especially flexible packaging plays an increasingly important role in many fields. Compared with other packaging methods, flexible packaging has more advantages. Flexible packaging has the characteristics of barrier properties, easy printing, low cost, light weight, impact resistance, transparency, microwave heating, aspect and packaging design options, and it is safe and hygienic. , Convenient, so popular with consumers. With the increasing demand for flexible packaging and the deepening of people’s awareness of energy-saving, environmentally friendly and green packaging, the flexible packaging industry has gained tremendous market momentum, which has promoted the stable and sustainable development of flexible packaging materials and flexible packaging equipment, thereby providing a huge opportunity for the development of the entire flexible packaging industry. Opportunity.

      Paper, plastic, glass, and metal are the four pillars of the modern packaging industry. Among them, paper and plastic are the most widely used, and their usage is also growing fastest. In the following areas, plastic flexible packaging plays an increasingly important role.

(1) Food packaging bag: 

When food is placed in the air, various changes (such as spoilage, rancidity, discoloration, drying or moisture absorption, etc.) will occur, resulting in untrustworthy. In addition to its own reasons, food spoilage has a lot to do with its environmental conditions. These environmental conditions mainly include oxygen, temperature, PH value and so on. Therefore, the primary function of composite flexible packaging for food is to reduce the adverse effects of environmental factors on food and prevent food from spoiling too quickly. The application forms of flexible food packaging materials include vacuum packaging, modified atmosphere packaging, moisture-proof packaging, aseptic packaging and heat shrink packaging, such as instant noodles, milk powder, tea, snack foods, snack foods, etc., beverages, candy, retort bags, pickles System of vegetables and meat products, frozen fish and shrimps, condiments, etc. 

(2) Packaging bags for cosmetics and detergents:

Due to its gorgeous appearance, rich functions, and diverse expressiveness, flexible packaging has become one of the most important packaging forms for daily chemical products, such as shampoos, moisturizers, and washing powders.

 (3) Medicine packaging bag:

Medicine is a commercial value-added product, which has high requirements for safety and reliability. Therefore, the medical flexible packaging must take into account the protection function of the medicine and the convenience of carrying and using at the same time. According to materials, common medical flexible packaging materials include composite films and bags for pharmaceutical packaging, aluminum foil for pharmaceutical packaging (PTP aluminum foil), polyvinyl (PVC) or non-PVC multi-layer co-extruded infusion film and bags, and aluminum-plastic sealing pads. Tablets, paper and composite paper bags, etc., such as aluminum foil blister, Chinese medicine tablets, capsules, pills, powders, etc. 

(4) Seed packaging bags: various crop seeds, vegetables, flower seeds, etc.

(5) Industrial product packaging bags: such as clothing, knitted underwear, women’s and children’s products packaging and New Year pictures, wall calendars, posters, etc.

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