METHOD FOR MODIFYING THE COLOR-HUE OF COLORED SYNTHETIC YARNS AND FILAMENTS, AND SYSTEM FOR CARRYING IT OUT

    公开(公告)号:WO2021018874A1

    公开(公告)日:2021-02-04

    申请号:PCT/EP2020/071230

    申请日:2020-07-28

    Abstract: The invention provides a method for modifying the color hue of already colored synthetic yarns and/or filaments in a conventional melt-spinning process, which allows correcting deviations from tolerances in the color hue by the manufacturers themselves. The method comprises storing color coordinates of a target hue; measuring color coordinates of colored yarns and filaments to be corrected; comparing the data to provide deviations beyond tolerances; preparing a correcting-liquid-masterbatch composition; converting the deviations beyond tolerances into a dose of the correcting liquid-masterbatch composition; and adding such dose to molten mass of the synthetic yarns and filaments. The invention is also directed to a system suitable for performing the method of color hue modification and/or correction.

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