METHOD FOR CHEMICALLY RECYCLING NYLON FIBERS PROCESSED WITH POLYURETHANE

摘要

PPROBLEM TO BE SOLVED: To provide a method for efficiently chemically recycling nylon fibers processed with a polyurethane, comprising thermally treating the nylon fibers processed with the polyurethane in an organic solvent to remove the polyurethane component ands then depolymerizing the polyurethane component-removed nylon fibers to recover a lactam. PSOLUTION: This method for efficiently chemically recycling the polyurethane nylon fibers processed with the polyurethane comprises a process (process a) for thermally treating the nylon fibers selected from polyurethane-processed nylon 6 fibers and nylon 12 fibers in an organic solvent to elute the polyurethane component in the organic solvent, a process (process b) for taking out the nylon fibers in the organic solvent, and a process (process c) for depolymerizing the polyurethane-processed nylon fibers to recover the lactam. PCOPYRIGHT: (C)2008,JPO&INPIT