Glass fiber yarn is mainly used for electrical insulation materials, industrial filter materials, anti-corrosion, moisture, insulation, sound insulation, vibration damping materials, as a reinforcing material, the use of glass fiber yarn far than other kinds of fiber come widely for manufacturing reinforced plastic, glass fiber yarn or reinforced rubber, reinforced gypsum and reinforced cement products, glass fiber yarn with organic material coated glass fiber can improve its flexibility, used to package is made of cloth, window screens, wall covering, covering cloth, protective clothing and electric and sound insulation material.