Glass bottle production technology mainly includes: ①raw material pre-processing. The massive raw materials (quartz sand, soda ash, limestone, feldspar, etc.) are crushed, the wet raw materials are dried, and the iron-containing raw materials are treated with iron removal to ensure the quality of glass. ② Preparation of complex materials. ③ Melting. The glass compound is heated at high temperature (1550~1600 degrees) in the pool kiln or the pool furnace, so that it forms uniform, no bubbles, and meets the molding requirements of the liquid glass. ④ Forming. Put the liquid glass into the mold to make the required shape of glass products, such as plates, various utensils, etc. ⑤ Heat treatment. Through annealing, quenching and other processes, eliminate or produce internal stress, phase separation or crystallization, and change the structural state of the glass. The advantages of glass packaging containers in the beverage packaging field.
Glass packaging materials and containers have many advantages:
1.glass material has good barrier performance, can well prevent oxygen and other gases inside the invasion, at the same time can prevent the volatile components of the inside to the atmosphere volatilized;
2. Glass bottles can be used repeatedly, which can reduce packaging costs;
3.the glass can be easier to change the color and transparency;
4.glass bottle safety and health, good corrosion resistance and acid corrosion resistance, suitable for acidic substances (if vegetable juice drinks, etc.) packaging;
5. In addition, because the glass bottle is suitable for the production of automatic filling production line, the development of domestic glass bottle automatic filling technology and equipment is relatively mature, and the use of glass bottles to pack fruit and vegetable juice drinks has certain production advantages in China. The first is to design and manufacture the mold. The glass raw material is quartz sand as the main raw material, and other auxiliary materials are melted into liquid at high temperature, and then injected into the mold, cooling, cutting and tempering, to form a glass bottle. Glass bottles generally have rigid marks, which are also made of mold shapes.Glass bottle molding according to the production method can be divided into artificial blowing, mechanical blowing and extrusion molding three kinds. Glass bottles can be divided into the following types according to the composition: one is sodium glass, two is lead glass and three is borosilicate glass.
The main raw materials of glass bottles are natural ore, quartz stone, caustic soda, limestone and so on. Glass bottles have a high degree of transparency and corrosion resistance, and contact with most chemicals will not change the material properties. Its manufacturing process is simple, free and changeable shape, high hardness, heat resistance, clean, easy to clean, and has the characteristics of repeated use. As a packaging material, glass bottles are mainly used in food, oil, wine, drinks, condiments, cosmetics and liquid chemical products, and so on. But glass bottles also have its disadvantages, such as heavy weight, high transportation and storage costs, impact resistance and so on.
Post time: Jan-09-2023