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Chemical properties: When glass fiber is used as a reinforcing material for reinforced plastics, the biggest feature is its high tensile strength. The tensile strength is 6.3～6.9g/d in the standard state and 5.4～5.8g/d in the wet state. The density is 2.54. Good heat resistance, no effect on strength when the temperature reaches 300℃. It has excellent electrical insulation and is a high-grade electrical insulation material. It is also used for thermal insulation materials and fire protection shielding materials. The chemical resistance to inorganic acids and organic acids impregnated with hydrofluoric acid and phosphoric acid is very strong.
Uses: Long fibers are used as electrical insulation materials, fiber reinforced plastics, shielding materials, filters and reinforcing materials for abrasives, etc. Short fibers are used as heat insulation, heat preservation, sound insulation materials, anti-corrosion materials and battery materials for buildings, refrigerators, industrial installations, etc. Optical fibers are used for the transmission of optical images.