The invention relates to a melt direct
spinning technology for producing
colored polyester filament, belonging to the technical field of chemical
fiber production, which mainly solves the technical problem that a melt direct
spinning producing method with low cost, high yield, simple technology, easy control of
color difference and good color fastness of fabrics is provided. The invention is characterized in that the modified material after
drying, melting, filtering and measuring are injected before the
polyester melt enters a
spinning box; and the modified material and the
polyester melt enter the spinning box together for spinning after even mixing in a high-efficiency
static mixer. The invention has the advantages of easy infiltration of master batch into
fiber, good performance of the
colored polyester filament product produced through the method such as high quality, good color fastness, wash resistance and abrasion resistance, simple technology, less equipment investment, easy control of material adding, convenient realization of
automatic control, and avoidance of environmental
pollution.