Plastic
The pigment content of masterbatches for plastics is usually between 10% and 20%. When used, it is added to the plastic that needs to be colored in a ratio of 1:10 to 1:20 to achieve the designed pigment concentration of the colored resin or product. Color masterbatch plastic and colored plastic can be of the same variety or compatible with other plastic varieties. Color masterbatch can be a single color variety or a combination of multiple pigment varieties. The selection of pigments should comply with the processing conditions and various quality requirements of plastic products. The application of color masterbatch in the field of plastic products is relatively mature and common. 85% of the colorants in plastic products use color masterbatch, which is convenient to use and does not cause dust flying of dry powder pigments. It completely solves the problems of color spots and inconsistent pigments caused by poor pigment dispersion in products.
Polyethylene, polypropylene, polyvinyl chloride, organic glass, nylon, polycarbonate, celluloid, phenolic plastics, epoxy resins, amino plastics, and other varieties all have corresponding color masterbatches. In the plastic industry, the demand for color masterbatch market is concentrated in engineering plastic products (household appliances, automobiles), construction plastic products (pipes, profiles), agricultural film products, plastic packaging products, and other aspects. The industries such as home appliances, automobiles, and construction plastic products have high requirements for color masterbatch, which have a large usage and have a driving effect on the development of color masterbatch.
Rubber
The preparation method of rubber color masterbatch is similar to that of plastic color masterbatch. The selected pigments, plasticizers, and synthetic resins should be compatible with the rubber. Pigments are mainly used as reinforcing agents and colorants in rubber. Black pigments mainly consist of carbon black. White pigments include zinc oxide, titanium dioxide, calcium carbonate and so on. Other pigments include iron oxide, chrome yellow, ultramarine blue, chrome oxide green, light resistant yellow, benzidine yellow, phthalocyanine green, lake red C, dioxin purple and so on. Carbon black is widely used in wires, cables, and tires, replacing all traditional carbon black with carbon black masterbatch. And its dosage occupies the primary position among all color masterbatches.
When processing rubber, using rubber color masterbatch can avoid dust flying caused by powdered pigments and improve the operating environment. The color masterbatch is easy to disperse evenly, making the color of rubber products uniform and consistent and reducing the actual consumption of pigments. The amount of rubber coloring pigment is often between 0.5% and 2%, and the amount of inorganic pigment is slightly higher. This type of processing pigment should be matched with the rubber processing technology and quality to meet the needs of the rubber industry.
Fiber
Fiber coloration refers to the process of adding color masterbatch directly to the fiber adhesive or fiber resin during the spinning process, resulting in the pigment being present during the spinning process, which is called internal fiber coloration. Compared with traditional dyeing, fiber stock dyeing processes resin and color masterbatch into colored fibers and directly uses them for textile, omitting post dyeing and finishing processes. It has advantages such as low investment, energy saving, no three wastes and low dyeing cost, currently accounting for about 5%. The pigment used for fiber coloring masterbatch requires bright color, good dispersibility, good thermal stability, light resistance, solvent resistance, acid and alkali resistance, bleach resistance, and insoluble in water. Inorganic or organic pigments can be selected.
