Polyester fiber coloring is the process of processing synthetic resin and polyester masterbatch into colored fiber for textile use. Compared with the traditional dyeing method, the polyester masterbatch has the advantages of small investment, no pollution, and low coloring cost.

Application in pre-coloring of polyester spinning (PET)----polyester (polyethylene terephthalate fiber) is also a kind of synthetic fiber, which is used in various fibers, due to high processing temperature. Therefore, the heat resistance and color purity of the pigments of the polyester masterbatch are very high.