Major Components of Glass Fiber

The main components of glass fibers are silica, alumina, calcium oxide, boron oxide, magnesium oxide, sodium oxide, etc. According to the alkali content in the glass, they can be divided into alkali-free glass fibers (0% - 2% sodium oxide, which belongs to aluminium borosilicate glass), medium-alkali glass fibers (8% - 12% sodium oxide, which belongs to boron-containing or boron-free sodium calcium silicate glass) and high-alkali glass fibers (over 13% sodium oxide, which belongs to sodium calcium silicate to glass).