Introduction of four methods of masterbatch technology process

The color material used in the color masterbatch, the color masterbatch technology must pay attention to the matching relationship between the color material and the plastic raw materials and additives. The selection points are as follows.

(1) The colorant cannot react with the resin and various additives, and has strong solvent resistance, small migration, and good heat resistance. That is to say, the masterbatch cannot participate in various chemical reactions. For example, carbon black can control the curing reaction of polyester plastic, so carbon black material cannot be added to polyester. Color masterbatch technology Due to the high molding temperature of plastic products, the color material should not decompose and discolor under the molding heating temperature. Generally, inorganic pigments have better heat resistance, while organic pigments and dyes have poor heat resistance, which should be paid enough attention to when selecting colorants.

(2) The dispersibility and tinting strength of the pigment should be good. When the colorant is not uniformly dispersed, it will affect the appearance of the product; when the colorant has poor tinting strength, the amount of the colorant will increase and the material cost will increase. The dispersibility and tinting strength of the same colorant in different resins are not the same, so this should be paid attention to when selecting the colorant. The particle size of the pigment is also related to the dispersibility. The smaller the particle size of the pigment, the better the dispersibility and the stronger the tinting strength.

  The technical requirements for color masterbatch are very strict, and the generally used color masterbatch technology is wet process. The color masterbatch is made by water phase grinding, phase inversion, water washing, drying and granulation. Only in this way can the product quality be guaranteed. In addition, while the pigment is being ground, a series of color masterbatch technical tests should be carried out, such as measuring the fineness of the sanding slurry, measuring the diffusion performance of the sanding slurry, measuring the solid content of the sanding slurry, and measuring the fineness of the color paste, etc. project.