The main performance and evaluation method of pigment for Color Masterbatch
The selection of pigment for Color Masterbatch should not only refer to the related technical standards of ink and paint, but also the processing and application needs of the products, such as heat resistance, resistance to migration, weather resistance and solvent resistance, as well as the interaction with polymers and additives. The pigment chosen is not only brilliant, but also durable and durable. The main properties and evaluation methods of pigments used for masterbatch are described below.
1. the coloring power of pigments is the amount of pigment required for a certain color product, expressed by the percentage of the standard sample's coloring power. That is to take 1g standard sample, add Ag white pigment, and mix it into a certain color mixture. Then take the 1g to test the pigment, add white pigment, until the standard light source color is the same as the standard sample mixture, the A color pigment is Bg, then the pigment's coloring force I is I=B/A× the coloring force of the 100% pigment is not only related to its properties, but also related to the degree of pigment dispersion. The degree of dispersion mainly refers to the degree of refinement of the pigment, the greater the degree of dispersion, the stronger the coloring power, but there is a maximum value. The above is the standard for the coloring force of ink and paint. The standard of standard sample and sample is suggested to be added to the standard sample and sample, which is measured by the ratio of the same depth, that is, A is the amount of resin added to the standard color plate, and the B is the added tree fat when the color depth is similar to the A color.
2. the heat resistance of pigment used for heat resistant plastics refers to the degree of change of pigment's color or performance under processing and using temperature. When considering the heat resistance of pigment, the heating time should also be considered. As plastic is processed into products, the processing method is different and the heating time is different. In the process of use, the use is different and the heating time is different. The heat resistance time of the pigment is generally 4 ~ 10rain. Generally, the higher the temperature is, the shorter the heat tolerance time is.