Chemical composition of glass fiber

The chemical composition of glass fiber is mainly silica, boron trioxide, calcium oxide, aluminum oxide, etc., which play a decisive role in the properties and production process of glass fiber. Silica based glass is called silicate glass, and borate glass based on diboron trioxide. Alkaline oxides such as sodium cyanide and potassium oxide are flux oxides. It can reduce the melting temperature and viscosity of the glass, so that the bubbles in the glass melt can be easily eliminated.It mainly breaks the glass framework and loosens the structure to achieve the purpose of fluxing. Therefore, the higher the content of sodium oxide and potassium cyanide, the strength, electrical insulation and chemical stability of the glass fiber will be correspondingly reduced. Adding calcium oxide, aluminum oxide, etc., can form part of the glass network under certain conditions and improve certain properties and process performance of the glass; replacing silica with calcium oxide can reduce the drawing temperature; adding aluminum oxide can reduce the drawing temperature. Improve water resistance. In short, the formulation of the chemical composition of glass fiber must meet the requirements of the physical and chemical properties of glass fiber and have good chemical stability; on the other hand, it must meet the requirements of the manufacturing process, such as suitable molding temperature, hardening speed and viscosity range.