The Chinese name polyethylene terephthalate, it is the No. 1 material in the international material label number. Its main characteristics are high air tightness, good compressive strength, high water resistance, and very transparent. Its transparency is as high as 95%, which is higher than other commonly used plastic packaging containers, but it is not heat resistant. It is often used in packaging materials for food, beverage bottles and cosmetic bottles. It is precisely because of its high air-tightness and the packaging container has no pores, so it is best to use it to make a container for packaging alcohol.
The Chinese name of high-density polyethylene, also known as high-density PE, is the second material in the international material label number. Its main feature is good acid and alkali resistance. The products processed by it are translucent, and the heat resistance is not very good. The packaging containers made of it have pores. It is often used in packaging containers for chemicals such as medicine bottles and cosmetic bottles.
The Chinese name is polyvinyl chloride. It is the No. 3 material in the international material label number. Its main characteristics are transparency and heat resistance. Before the advent of early PET, it replaced PET and was used in mineral water, juice and other beverages. It is currently the largest It is used to manufacture water pipes for building materials and enameled outer wires of electric wires. The container made of it will have pores, so it is not suitable to be used for wine.
The Chinese name of low-density polyethylene, also known as low-density PE, is the No. 4 material in the international material label number. Because of its low molecular density, it is softer than HDPE. The products processed by it are translucent and non-transparent. It is heat resistant and has pores, but it has good acid and alkali resistance. Containers made of this material are often used in chemicals such as facial cleanser, salad, glue bottle, cosmetic bottle hose, etc.
The Chinese name is polypropylene. It is the No. 5 material in the international material labeling number. It is a high-density material. The products processed by it are translucent, heat-resistant, impact-resistant, acid and alkali resistant, but have pores . It is commonly used for microwave-grade processing of daily necessities such as hot-filled and packaged food, microwaveable cooking tableware, high-temperature food, and general household face plates, mouthwash cups, such as measuring cups.
The Chinese name is polystyrene. It is the No. 6 material in the international labeling material number. The products processed by it are extremely transparent and have good airtightness, but they are fragile and not heat resistant. It is often used in the processing of sealed cans and food boxes.
It is the No. 7 material in the international marked material number. The products processed with it are transparent, high in heat resistance, and not easily broken. It is often used in the processing of milk bottles, distillation barrels, heat-resistant barrels, and medicine bottles. It is the best product among plastics, but its price is the highest among the seven products.