Filament dia. (u): 5.5

Fireproof Fiberglass Sewing Fire Retardant Thread is made of multi-ply fiberglass roving yarn treated with PTFE after high twist compound,with the characteristics of high strength, corrosion resistance, heat resistance and little moisture absorption, etc.It is widely used for weaving all kinds of fabrics in the scope of reinforcement, insulation, corrosion resistance, heat resistance and so on.