Masterbatch coloring is the most commonly used plastic coloring method today. The colorant dispersed in the carrier is simply mixed with the original color masterbatch resin to produce a plastic article. The coloring material is mixed with a coloring agent and a coloring agent to be granulated into a colored plastic, and then used in a molding process. Dry powder coloring: The powdered coloring agent is uniformly mixed with the natural color resin and directly used for the manufacture of plastic products.
Different functional masterbatches have different properties when pigments are selected. The following describes the function of masterbatch:
The pigments selected for heat-resistant masterbatch, the most basic requirements can withstand the temperature in the production process of polypropylene fiber, to maintain its performance is stable. The temperature resistance temperature is generally required to be 270 ~ 280 ° C or more.
The pigment for disperse masterbatch should be excellent in dispersibility, and should be uniformly dispersed in the masterbatch, and the dispersant used does not reduce the quality of the polypropylene fiber. Otherwise, the quality of the raw liquid colored fiber cannot be produced, and the operation is unstable. It is easy to break or produce abnormal fibers when drafting fibers.
Light resistance Some pigments have a photosensitizing effect under the action of light, which causes the colored fibers to fade and be brittle. The light resistance of the pigment is basically related to its chemical structure. Therefore, attention should be paid to the light fastness and light resistance of the pigment when making the masterbatch. When the pigment needs to be used, it is possible to consider adding a UV absorber.
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