Polyester polymer recovery from dyed polyester fibers

Details Polyester polymer recovery from dyed polyester fibers Polyester polymer recovery from dyed polyester fibers

C - Chemistry, Metallurgy

08

J

403/8

C08J 11/00 (2006.01) B29B 17/00 (2006.01) C08J 11/08 (2006.01)

Patent

CA 1094249

POLYESTER POLYMER RECOVERY FROM DYED POLYESTER FIBERS ABSTRACT Polyester polymer is recovered from polyester fibers (in the form of filaments, yarns or fabrics and the like, both dyed and undyed), and used in the production of new undyed fibers, films, and other polymer products by the process of stripping the dye from the dyed polyester fibers and dissolving the polyester fibers in a solvent in a separate but functionally interrelated (with the dye stripping step) step; separating the dissolved fibers from any undissolved impurities, and thereafter separating the solvent from the polyester without precipitating the polyester by evaporating the solvent.

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