Fiberglass sewing thread is composed of fiberglass yarn threadwith PTFE. It features high tensile strength, good sewing propertyand high temperature textiles. It necessary fitting material usedto sew filter bags on industrial high-speed sewing machine, alsoused to sewing weak alkali-resistant weave and sewing hightemperature textiles. It can be used below 300. Deg for a longperiod, with high tensile strength.