Abstract
The effect of ammonium chloride as a nondurable finish on the flammability of 100% polyester fabric has been investigated. The laundered, bone-dried, weighed fabrics were impregnated with a suitable concentration of aqueous ammonium chloride solution by means of squeeze rolls and drying at 110°C for 30 min. They were then cooled in a desiccator, re-weighed in an analytical balance and kept under ordinary conditions before the fulfillment of the vertical flame spread test. The optimum add-ons to impart flame retardancy were about 20.21–21.87 g anhydrous ammonium chloride per 100 g fabric. These results comply with the Free Radical Theory. Finally, the Mohr analytical test method was used to detect the salt content in finished fabrics.
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