Of course, black masterbatch is a kind of Color Masterbatch, but its status is somewhat different from other color masterbatches. It is the most commonly used color masterbatch in our plastic processing and the largest one. It is widely used in plastic processing industry, such as injection molding, extrusion molding, blow molding and so on. In real life, it is widely used in the injection molding of automotive plastic parts, the extrusion molding of plastic pipes, and the production of agricultural film and geotechnical materials.
Black masterbatch production process:
(1) Ink method: as the name suggests, it is the production method of ink paste in the production of Color Masterbatch, that is, a low molecular protective layer is coated on the pigment surface through three roll grinding. The ground fine color slurry is mixed with the carrier resin, then plasticized by a two roll plasticizer (also known as a two roll open mixer), and then granulated by a single screw or twin-screw extruder.
(2) Washing method: the pigment, water and dispersant are sanded to make the pigment particles less than 1 μ m. The pigment was transferred into oil phase by phase transfer method, and then dried to obtain color masterbatch. Organic solvents and corresponding solvent recovery devices are required for phase conversion.
(3) Kneading method: after mixing the pigment with the oily carrier, the pigment is washed from the aqueous phase into the oil phase by kneading. At the same time, the surface of the pigment is coated by an oily carrier to disperse and stabilize the pigment and prevent the pigment from condensing.
