High temperature resistance：The high temperature resistance of glass fiber itself is very excellent. Due to the different proportion of composite materials and processing technology, glass fiber products can withstand 300 ° C-1000 ° C to maintain their performance.

High strength：When glass fiber is used as a reinforcing material of reinforced plastics, its biggest feature is high tensile strength. The tensile strength is 6.3~6.9 g/d in standard state and 5.4~5.8 g/d in wet state.

Good insulation： Alkali free glass fiber has high insulation resistance, good dielectric property, moisture absorption and high temperature resistance, and has remarkable effect as electrical insulation material in mechanical and electrical industry.

Corrosion resistance：Glass fiber has good stability under the action of water and various mediums, but different glass fiber components have different resistance to different mediums. Generally, it is only corroded by concentrated alkali, hydrofluoric acid and concentrated phosphoric acid.