Packaging is the general name of containers, materials and auxiliary materials used in accordance with certain technical methods to protect products in the process of circulation, facilitate storage and transportation, and promote sales; also refers to the use of containers, materials and auxiliary materials for the above purposes. Operational activities such as applying certain technical methods in the process of material production. Marketing-oriented packaging focuses on planning strategies and becomes a generalized packaging. You can also dress up someone or something or try to help him be perfect in some way. The Chinese national standard GB/T4122.1-1996 stipulates that the definition of packaging is: “To protect the product during the circulation process, facilitate storage and transportation, and promote sales, the overall collection of containers, materials and auxiliary materials used according to certain technical methods. Name. It also refers to the operation activities of applying certain technical methods in the process of using containers, materials and auxiliary materials to achieve the above-mentioned purposes.” Other countries or organizations have different expressions and understandings of the meaning of packaging, but the basic meaning is the same , all take the function and function of packaging as their core content, and generally have two meanings: ① about the containers, materials and auxiliary items for containing goods, that is, packaging; ② about the implementation of technical activities such as packing, sealing, and dressing. Parafilim is a composite material with sealing performance, anti-counterfeiting effect, preventing volatilization and pollution of product contents, and odorless precipitation. This product is widely used in: cosmetic packaging sealing film, daily necessities packaging sealing film, food packaging sealing film, pharmaceutical packaging sealing film and chemical packaging sealing film and other industries. The main features of the sealing film are good sealing performance, anti-counterfeiting effect, preventing volatilization and pollution of product contents, and the sealing performance can be odorless. In addition, it has anti-counterfeiting and anti-theft properties, and can also print company advertisements on the sealing film to achieve promotional effects. Packaging bags, including aluminum foil packaging bags, and a series of packaging products are not uncommon in life. Today we will mention another kind of packaging. It is also a kind of packaging equipment that is popular all over the world. It is the most common sealing film on the market. What is a sealing film, I believe that everyone who has drank milk tea, yogurt and eaten instant noodles and pickles knows that there is a layer of film on the surface that needs to be removed to eat the food inside. This protective film is the so-called sealing film. Like many packaging bags, it also belongs to aluminum foil packaging bags. The sealing film can be translucent, fully transparent or plastic or aluminum foil packaging materials, and is currently widely used in many packaging industries. The sealing film can tightly wrap the surface layer so that it does not leak. It has good impermeability, moisture-proof and moisture-proof, and has insulating properties. It has enough quality to prevent the product from being damaged by air such as oxygen. Sealing film, like gas packaging bags, has a place in today’s packaging market, especially in plastic flexible packaging. Vacuum packaging bags, tea packaging bags