Glass fiber is a kind of inorganic nonmetallic material with excellent performance, a wide variety of advantages are good insulation, strong heat resistance, good corrosion resistance, high mechanical strength, but the disadvantage is brittle, poor wear resistance. It is made of glass balls or waste glass by high temperature melting, wire drawing, winding, weaving and other processes. The diameter of its monofilaments is several microns to more than 20 meters microns, which is equivalent to 1/20-1/5 of a hair. Each bundle of fiber raw silk is composed of hundreds or even thousands of monofilaments. Glass fiber is usually used as reinforcement materials in composite materials, electrical insulation materials and thermal insulation materials, electric roadbed board and other areas of the national economy.
The general concept of glass is hard and fragile objects, not suitable for structural materials, but if it is drawn into silk, its strength is greatly increased and has softness, so with resin to give shape finally can become an excellent structural materials. The strength of glass fiber increases as its diameter decreases.
