Polyester masterbatch is composed of excess chemical additives, carrier resin and dispersant. Masterbatches are aggregates obtained by uniformly loading supernatant pigments in the resin. Masterbatch is the last century 60's Western European countries first developed, China's research in this area started late but developed rapidly, is now entering a period of rapid development.

Polyester masterbatch technology is very strict technical requirements, the general use of masterbatch technology is the wet process that the masterbatch by the water phase grinding, transfer, washing, drying, granulation, only such masterbatch Quality can be guaranteed. In addition, the pigment can be subjected to a series of masterbatch technical tests at the same time as the grinding process, such as the fineness of the sanding slurry, the diffusion performance of the sanding slurry, the solid content of the sanding slurry and the fineness of the paste project.

First, the main composition of polyester masterbatch
pigment. Generally divided into organic pigments, such as phthalocyanine green; inorganic pigments such as iron oxide red, titanium white; dyes such as reduced pink, scattered orange and so on. Polyolefin, PVC masterbatch is used in pigments, the general dye can not be used for polyolefin coloring, otherwise it will cause serious migration.
Dispersant. Mainly on the pigment surface wetting, is conducive to further dispersion of the pigment, and stable in the resin, and must be compatible with the resin is good, does not affect the color product quality. Polyolefin color masterbatch dispersant generally use low molecular weight polyethylene wax (preferred Qingdao Bonnie production of polyethylene wax recommended BN208, and domestic well-known masterbatch enterprises long-term cooperation) or zinc stearate, etc .; engineering plastic color Masterbatch dispersant generally used polar wax BN500A), magnesium stearate, calcium stearate and so on.

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