Flammability Characterization of textiles, can limit oxygen index (LOI), namely, to maintain the combusted materials continue to burn the oxygen-containing volume of the minimum required percentage. Limiting oxygen index (LOI) will be divided into four categories: non-combustible (LOI ≥ 35%) textiles, textile raw materials such as metal fibers, carbon fibers, asbestos, boron fiber, glass fiber, PBO fiber, PBI (polybenzimidazole) fiber , polyimide fibers; flame (LOI = 26 ~ 34%) of textiles, such as Kevlar, Teflon, polyvinyl chloride, modified acrylic modified polyester, modified polypropylene, modified polyvinyl alcohol, modified viscose PPS (polyphenylene sulfide), seaweed fiber; combustible (LOI ≥ 26% ≤ 34%) textiles such as polyester, nylon, polyvinyl alcohol, wool, silk, acetate fibers; flammable (LOI ≤ 20) textiles, such as polypropylene, acrylic, cotton, linen, viscose fiber, bamboo fiber, soybean protein fiber, milk protein fiber, etc.. Noncombustible fiber retardant effect is good, but most not suitable for wearing or home, most often used natural or chemical fibers are combustible or flammable, the only type of textile the modified or finishing in order to improve their fire-retardant flame retardant performance, that is, will have fire retardant pants features added to textiles in order to achieve the flame-retardant effect through a variety of channels.
Fiber flame retardant way to prevent or reduce the fiber thermal decomposition, isolated or diluted oxygen, rapid cooling terminated burning. In order to achieve the above object, there will be retardant features a flame retardant polymer blend, copolymer, composite spinning, then technological transformation, etc. was added to the chemical fiber in the go or finishing method using the flame retardant coating The layer on the fiber surface, or to penetrate the interior of the fiber. In practical applications, often using a variety of fire fighter apparel, a way synergistic effect of two or more of the flame-retardant effect.