Main > TEXTILES > Fibers > Elastomer Fiber. > Spandex/Elastane PolyUrethane Fiber > Co.: USA. I (Producer/Patents) > Patent > Claims Etc > Claim 1 PolyUrethane Durable Fiber > Mfg. Process by Dry Spinning a PU > Soln. in Organic Solvent, > Additive Ratio=1.7-3, Hard Ratio= > 0.65-3, MW=30,000-200,000 & > Softening Point=130-250C. Claim 2 > PU Soln. Mfg. Dissolving Solvent > DiIsocyanate Addition PolyOl Obtain > ed by Reacting PolyOl+DiIsocyanate

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Additive Ratio=1.7-3 & Add DiOl

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