The dispersion of imported plastic pigments not only affects the appearance (spots, streaks, gloss, color and transparency) and processability of the colored products, but also directly affects the quality of the colored products, such as strength, elongation, aging resistance and resistivity.
Imported plastic pigments have more advantages in the plastics, paint, ink, and coating industries: inks with good fluidity, dispersion, and gloss. It has good stability and coloring power in coatings. With the increase of pigment particle size, the impact strength and elongation of products decrease
The refining of the pigment is to break up the agglomerate particles. It mainly depends on the free movement between the pigment particles (impact stress) and the stress of the pigment agglomerates through the surrounding medium (shear stress). Therefore, there are three basic methods for refinement: dry mixing, liquid shear and melt shear. In the actual production process, these methods are used in combination. It is more conducive to play the advantages of each method. Plastic coloring is mainly inorganic and organic pigments, which require high color strength and colorfulness; good transparency or hiding, dispersibility, weather resistance, thermal stability, chemical stability Sex, electrical function, environmental performance, etc.
Light resistance and weather resistance of imported plastic pigments: In general, inorganic pigments have better light stability. Among organic colorants, phthalocyanine, quinacridone, dioxazine, isoindolinone and other organic pigments are light resistant. Very good performance, can be compared with inorganic pigments; dyes such as anthraquinone and ketone also have good light resistance plastics, inks, coatings: with high tinting strength and low viscosity. Plastic pigments should have good color performance, heat resistance and easy dispersibility. In order to increase the commercial value of plastic products, the pursuit of aesthetics has evolved to different requirements for the stability and high performance of colored products.