What is flame retardant yarn? Flame retardant yarn is a kind of special fabric that can retard flame combustion. It is mainly used to make protective clothing, special functional clothing and industrial fabrics, and is widely used in fire protection, clothing, oil, electricity, natural gas, metallurgy, machinery, mining, chemical industry, coal, aviation, shipping and other industries. Flame retardant yarn has low ignition point, good flame retardant effect, and is not easy to ignite. It is self extinguishing from the ignition source and has waterproof function to achieve permanent flame retardant effect. Compared with non flame retardant yarn, it will be obviously different when using fire.