（Introduction)：
Glass fiber, an inorganic non-metallic material with excellent performance, has a wide variety of advantages such as good insulation, heat resistance, good corrosion resistance and high mechanical strength, but the disadvantage is brittle nature and poor wear resistance. It is to chlorite, quartz sand, limestone, dolomite, boron calcium stone, boron magnesite six ores as raw materials by high temperature melting, drawing, yarn, weaving and other processes into its monofilament diameter of a few microns to more than twenty microns, equivalent to a hair of 1/20-1 / 5, each bundle of fiber filaments are composed of hundreds or even thousands of monofilaments. Glass fiber is commonly used as reinforcing materials in composite materials, electrical insulation materials and thermal insulation materials, circuit substrates and other areas of the national economy.
(Characteristics)：
(1) High tensile strength and low elongation (3%).
(2) High coefficient of elasticity and good rigidity.
(3) High elongation within the elastic limit and high tensile strength, so it absorbs large impact energy.
(4) Inorganic fiber, non-combustible, good chemical resistance.
(5) Low water absorption.
(6) Good scale stability and heat resistance.
(7) Good processability, can be made into strands, bundles, felts, weaving and other different forms of products.
(8) Transparent and can transmit light.
(9) Good adhesion with resin.
(10) Low price.
(11) It is not easy to burn and can be melted into glass-like beads under high temperature.
（Applications）
Glass fiber products are widely used in various fields, of which electronics, transportation and construction are the three main applications, and also represent the development trend of the world glass fiber industry in the coming years.
