What are the quality requirements of glass jars? How is the glass container made?

Glass is not only transparent and bright, but also has high strength and hardness. It is an indispensable material in daily production and life. There are rich kinds of glass, in addition to the more common float glass, toughened glass, there are hot melt glass, laminated glass, ground glass and other varieties with special properties. If you want to know what the quality requirements are, and how the glass container is made, read this article.

Ⅰ. What are the quality requirements of glass bottles and jars

Quality requirements: glass bottles should have certain performance and meet certain quality standards.

① Glass quality: pure and uniform, no sand, stripes, bubbles and other shortcomings. Colorless glass has high transparency; Color glass is uniform and stable in color, and can absorb light energy of a certain wavelength.

② Physical and chemical properties: it has a certain chemical stability, and does not function with the clothes. With a certain shock resistance and mechanical strength, can withstand washing, sterilization and other heating, cooling process and filling, storage and transportation, meet the general internal and external stress, vibration, impact, can keep non-destructive.

③ Molding quality: maintain a certain capacity, weight and shape, uniform wall thickness, smooth mouth, smooth to ensure that the filling is convenient and good sealing. No distortion, surface is not smooth, uneven and cracks and other shortcomings.

II. How to make the glass packaging container?

First of all, the mold must be designed, determined and manufactured. The glass raw material is quartz sand as the main raw material, and other auxiliary materials are dissolved into liquid at high temperature, and then injected into the mold, cooling, cutting and tempering, and the glass packaging container is formed. Coloured glass bottles generally have rigid marks, which are also made of mold shapes. The molding of glass packaging container can be divided into manual blowing, mechanical blowing and extrusion molding according to the production method. Glass packaging container according to the composition can be divided into the following: one is sodium glass, two is lead glass, three is borosilicate glass.

The main raw materials of glass container are natural ore, quartz stone, caustic soda, limestone and so on. The glass container is highly transparent and resistant to corrosion. Contact with most chemicals will not change the material properties. Its manufacturing process is simple, free and changeable shape, hardness, heat resistance, clean, easy to clean, and can be used repeatedly and so on. As a packaging material, glass packaging container is mainly used in food, oil, wine, beverage, condiment, cosmetics and liquid chemical products, etc., which has a wide range of uses. But the glass packaging container also has its disadvantages, such as large weight, high transport storage cost, impact resistance, etc.


Glass is amorphous inorganic non-metallic material, generally with a variety of inorganic minerals (such as quartz sand, borax, boric acid, barite, barium carbonate, limestone, feldspar, soda soda, etc.) as the main raw materials, and add a small amount of auxiliary raw materials made. Its main components are silica and other oxides. The chemical composition of ordinary glass is Na2SiO3, CaSiO3, SiO2 or Na2O·CaO·6SiO2, etc., the main component is silicate double salt, is a kind of irregular structure of amorphous solid. Widely used in buildings, used for wind and light, belongs to the mixture. Another mixed with some metal oxides or salts and show the color of colored glass, and through the physical or chemical method of toughened glass, etc.

Post time: Jan-07-2021