Selection of pigments for masterbatch

The performance of different colors is different, the scope of use is also different, so in the selection of masterbatch colors, we should choose the appropriate color according to the specific use of the situation, so as to improve the performance of the product. And the pigment we choose can not react with other materials chemically, which will affect the performance of the product.

(1) the dispersion and coloring power of the pigment should be good. The appearance performance of the product will be affected when the pigment disperses unevenly, and the dosage of the pigment will be increased and the material cost will be increased when the dyeing force is poor. The dispersion and coloring power of the same pigment in different resins are not the same, so this should be noted in the selection of the pigment. The smaller the particle size of the pigment, the better the dispersion and the stronger the dyeing power.

(2) The pigment can not react with resin and various auxiliaries. It has strong solvent resistance, low mobility and good heat resistance. That is to say, masterbatch can not participate in all kinds of chemical reactions. If carbon black can control the curing reaction of polyester plastics, carbon black should not be added to polyester. Because of the high molding temperature of plastic products, the pigment should not decompose and discolor under the condition of molding heating temperature. Generally, inorganic pigments have good heat resistance, organic pigments and dyes have poor heat resistance, which should be paid enough attention in the selection of pigment varieties.