Following point: Glass is a non -crystal, without a fixed melting point. It is generally considered that its softening point is 500 ~ 750 ℃
Boiling point: about 1000 ℃
Density: 2.4 ~ 2.76 g/cm3
When glass fiber is used as a reinforcement material for enhanced plastics, the biggest feature is the strong tensile strength. The tensile strength is 6.3 ~ 6.9 g/d under the standard state, and the moist state is 5.4 ～ 5.8 g/d. The heat resistance is good, and the temperature does not affect the strength when the temperature reaches 300 ° C. With excellent electrical insulation, it is a high -level electrical insulation material, and it is also used for thermal insulation materials and fire shielding materials. Generally, it is only corroded by thick alkali, hydrofluoric acid and phosphoric acid.