Flame-retardant fabric, method for producing same and fireprotective clothes comprising same

A method for producing a flame-retardant fabric comprising:

• a cellulosic fiber;
• and a modacrylic fiber, wherein the cellulosic fiber is a natural cellulose fiber comprising a phosphorus compound, the modacrylic fiber comprises an antimony compound, the flame-retardant fabric comprises the antimony-containing modacrylic fiber in an amount of 14 to 54 wt %, antimony in an amount of not less than 1.7 wt %, and phosphorus in an amount of 0.3 to 1.5 wt % with respect to a total weight of the flame-retardant fabric, and the flame-retardant fabric has a weight per unit area of 180 to 250 g/m2, and the method comprising:
• subjecting a fabric comprising a natural cellulose fiber and a modacrylic fiber comprising an antimony compound to flame-retardant treatment with a phosphorus compound, wherein the flame-retardant treatment is performed by Pyrovatex treatment or ammonia curing using a tetrakis hydroxyalkyl phosphonium salt,
• wherein the flame retardant fabric has an afterflame time and an afterglow time of 0 seconds with a flame resistance test based on ASTM D6413.08.