Fireproof sewing thread is the necessary material used in household or industrial sewing machines for sewing open width filter bag, fireproof wrap, blanket, quilt, also for sewing fabric with alkali resistance, long-term used below 280℃, breaking strength<8kg.It can meet the sewing requirement of high temperature resistant fabric in industries as carbon black, metallurgy, cement, inorganic fireproof rolling shutters, fireproof wrap&bag, etc.