Knowledge about packaging bags

Packaging bags are ubiquitous in our lives. With the improvement of living standards, the quality of packaging bags is gradually improving. Diversified packaging bags enrich our life. Some basic knowledge, classification of packaging bags.

According to different raw materials, packaging bags can be roughly divided into the following categories:

1. PE packaging bag: PE is the abbreviation of polyethylene, which is a thermoplastic resin obtained by the polymerization of ethylene. In industry, it also includes copolymers of ethylene and a small amount of α-olefin; the finished product is a transparent plastic bag, which can be used in the packaging of clothing, luggage, electronic products, etc. The process can be divided into PE flat bag, ziplock bag, zipper bag, envelope bag, punched handbag, hand-held handbag, zipper bag, PE film, etc.

2. OPP packaging bag: OPP is polypropylene, bidirectional polypropylene, which has the characteristics of high transparency and brittleness. It is easy to use and beautiful. It is widely used in clothing, food, printing, stationery, cosmetics, paper and other industries. It can also print various patterns and punch butterfly holes, plane holes, etc. according to customer needs;

3. Aluminum foil bag: Aluminum foil bag is a bag made by a bag-making machine after compounding various plastic films. It can be used to package food, medicine and various daily necessities. Aluminum foil bag is also called a pure aluminum bag, aluminum foil bag. Packaging usually refers to aluminum-plastic composite vacuum packaging bags, which are suitable for moisture-proof, light-proof and vacuum packaging of large-scale precision machinery and equipment, chemical raw materials, and pharmaceutical intermediates. The four-layer structure is mostly used, which has good water and oxygen barrier functions. Its characteristics can be made into various packaging bags, customized packaging bags of different sizes and styles, and can also be made into flat pockets, three-dimensional bags, organ bags and other styles;

4. Kraft paper bag: Kraft paper bag is a kind of packaging bag made of all-natural wood pulp, which is green, environmentally friendly and pollution-free. Various packaging bags, used in food, supermarket shopping bags, clothing and other industries;

5. Aluminum coating bag: It is a composite packaging bag with many advantages. Its production cost is relatively low and the printing is exquisite. This type of packaging bag is anti-static, anti-ultraviolet, moisture-proof, oxygen-proof, light-proof, cold-resistant, oil-resistant, high-temperature resistant, fresh-keeping and oxygen-resistant. It has the characteristics of strong easy sealing and so on. It is used in the packaging of food, daily chemical, pharmaceutical, chemical and other industries, and can be made into stand-up pouches, special packaging bags, etc.