Abstract: In order to prepare glass fiber fabrics with properties of heat insulation and ablative resistance, inorganic fillers were added in the resin solution to fabricate the composite organic silicon resin. Then the composite organic resin was coated on glass fiber fabrics. Heat insulation and ablative resistance properties of glass fiber fabrics were characterized by the heat insulation test, TG analysis and ablative experiment. The results indicate that the optimum dosages of inorganic fillers were as follows: white carbon about 10%, mica powder about 5%, wollastonite powder 2-5%, and chromic oxide 5%. The ablative test showed that the back temperature of the coating glass fiber fabrics, which were fabricated according to the optimum processes of orthogonal test, reaching 200℃ took more than 8.4s, it was obviously higher than 3.0s of the original glass fiber fabric.

Key words: glass fiber fabric, silicon resin, coating, inorganic filler