Masterbatchpigment used, must pay attention to relations with pigment and plastic raw materials, additives between points below their choice.
(1) pigment and resin and various additives can not be reactive, solvent resistance, migration of small, good heat resistance and the like. That is, the masterbatch can not participate in a variety of chemical reactions. Such as carbon black to control the curing reaction of polyester plastic, it is not added to the carbon black pigment in the polyester.
Due to the high temperature plastic molding process, it should not decompose pigment discoloration at the molding heating temperature conditions. Generally good heat resistance of inorganic pigments, organic pigments and dyes poor heat resistance, this should be taken seriously enough in the choice of pigment varieties.
(2) dispersion, coloring pigment should be good. When the pigment dispersion uneven performance will affect the appearance of the article; coloring pigment is poor, it will increase the amount of pigment, the material cost increases. The same pigment dispersed in various resin and coloring power are not the same, so when selecting a colorant in attention to this. Toner particle size and dispersion also has a relationship, pigment particle size is smaller, the better dispersion, the coloring is also strong.
(3) should be aware of toner other properties, such as for use in food, the plastic toys of children, use nontoxic colorant; for the electrical aspects of plastic products, electrical insulation should choose good pigment; with outdoor aspect of plastic products, should choose good resistance to weathering performance pigment and the like.
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