Fiberglass is a kind of inorganic nonmetal material with excellent performance. It has many kinds of advantages, such as good insulation, strong heat resistance, good corrosion resistance and high mechanical strength, but its disadvantages are brittle and poor wear resistance. It is made of pyrophyllite, quartz sand, limestone, dolomite, bornite and brucite by high temperature melting, wire drawing, winding and weaving. The diameter of the monofilament ranges from several microns to more than 20 microns, which is equivalent to 1 / 20-1 / 5 of a hair.
Each bundle of fiber precursor consists of hundreds or even thousands of monofilaments. Glass fiber is usually used as reinforcement material in composite materials, electrical insulation material and thermal insulation material, circuit board and other fields of national economy.