Fiberglass bulked yarn is textured by the high pressure air in the special equipment. For this reason, it has not only high strength of continues fiber, but the bulkiness of short fiber. It has the properties of temperature resistance(550℃),low heat coefficient(≤0.035Kcal/m.h.℃),corrosion resistance, high rate of porosity and filtration It has been widely used in western countries. I can be used as filter cloth, decoration cloth and insulation material. It is a best substitute for asbetine.