The application of flame retardant finish to cotton/polyester fabrics has not been successfully achieved so far because of the combination of two different kinds of fibers having opposite properties, hydrophilic and hydrophobic. The authors paid the attention to this point and attempted to investigate flame retardant finishes for cotton/polyester blended fabrics with the following processes.
1. THPS, a flame retardant, effective for cellulosic fibers as mentioned in our previous reports, was applied under the altered conditions in which concentration, additives and heating condition were varied.
2. Proban finish effective for cellulosic fibers was applied in combination with hexabromocyclododecane (HBCD) effective for polyester with some additives under 12 different conditions.
3. Nonnen C-617, a flame retardant developed for cotton/polyester blended fabrics were used under 13 varied conditions with different kinds of additives.
As a result of observing LOI values, tensile strength and elongation as well as the durability against 25 repetitions of washing for the evaluation of the finished fabrics, it was concluded that a sample treated with 60% Nonnen C-617 showed the most favorable results, but further investigations are still required for an improvement of the flame retardancy, which will be reported in the subsequent paper.
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