Glass jars such as hermetic glass jars and frosted glass jars are packaging containers for food, beverage and many products. They are widely used. Glass is also a very historical packaging material. In the case of many packaging materials flooding into the market, glass containers still occupy an important position in beverage packaging, which is inseparable from the packaging characteristics that other packaging materials can not replace.
Glass jars have a series of advantages, such as cleanliness, beauty, transparency, high chemical stability, air-tight, easy to seal, keeping the properties of filling items unchanged, being able to be used many times, rich in raw materials, low prices, and so on. They have become widely used packaging materials in food, medicine, chemistry and other industries. Glass jars have been under intense competition from white iron, plastic bottles and so on, which forces them to constantly improve their production process in order to obtain a large number of low-cost and high-quality products. At present, glass jars have reached the level of complete automation in various production processes, such as raw material ingredient, melting, forming, annealing, product inspection and packaging.