PROCESS FOR COLOURING ELEMENTS MADE OF POLYMERIC MATERIAL, IN PARTICULAR YARNS SELECTIVELY PRODUCED IN POLYETHYLENE (PE), IN ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENE (UHMW-PE) AND DERIVATIVES THEREOF SUCH AS HSHM-PE

摘要

There is described a process for colouring elements made of polymeric material, in particular yarns produced selectively in polyethylene (PE), in ultra high molecular weight polyethylene (UHMW-PE) and derivatives thereof, such as HSHM-PE, comprising a step of immersing the elements (10) in a liquid colourant (1) comprising at least: water (2); pigments (3) chosen from anthraquinone colorants, azo colorants and inks for the textile industry; and additives (4) comprising at least an equalizing agent (6) and a dispersing agent (7); the immersion step being performed at a temperature between 500C and 2200C.