TO IMPROVE THE FLAME RESISTANCE OF SPANDEX ELASTIC ELASTOMERIC FIBER

摘要

During the second year, our efforts centered around improving the strength characteristics of fibers to pass the 70% oxygen/30% nitrogen specification;developing spinning techniques;and developing information about incorporating these fibers in fabric structures using wrapping materials of Beta Fiberglas, Nome and PBI.nWe have worked with formulations based on urethanes, fluorinated polymers, and combinations of the two. Each formulation included flame-retardant additive. We have shown that urethane is so flammable that up to 90% additive must be incorporated to get the necessary flame-retardant properties. At this level, tensile strength drops to an unacceptable level of less than 500 psi. For this reason, we devoted our efforts to the fluorinated polymers which are inherently more flame retardant. The best of these polymers was Vinton. Our best formulation at present is based on 100 parts of Vinton, 100 parts of decabromobiphenyl (flame retardant) and 7 parts of plasticizer (phosphate) and curing ingredients.