Phosphorus-Nitrogen Synergism in the Fire Barrier of Greige Cotton Nonwoven Fabrics

By optimizing the ratio of diammonium phosphate to urea, we have fine tuned the development of the greige cotton fire barrier fabrics for mattresses to comply with the flammability regulations (16CFR 1633). Concentrations of phosphorus and nitrogen on greige cotton were determined by elemental analysis. Char from a LOI test was examined by SEM and FTIR to explain the phosphorus-nitrogen synergism.