Production process requirements and process flow o

The production process requirements and production process flow of Color Masterbatch

the production process requirements of color masterbatch are very strict, and the wet process is generally used. The masterbatch is made by grinding in water phase, phase transformation, washing, drying and granulation. Only in this way can the product quality be guaranteed. In addition, while grinding the pigment, a series of tests should be carried out, such as measuring the fineness of the sanding slurry, measuring the diffusion performance of the sanding slurry, measuring the solid content of the sanding slurry and measuring the fineness of the color slurry

there are four methods for the production process of Color Masterbatch:

(1) ink method: as the name suggests, it is the production method of using ink paste in the production of Color Masterbatch, that is, through three roll grinding, a low molecular protective layer is coated on the surface of the pigment. The ground fine color paste is mixed with the carrier resin, then plasticized by a two roll plasticizer (also known as a two roll open mixer), and finally granulated by a single screw or twin-screw extruder

the process is as follows:

coarse color paste three roll grinding fine color paste two roll plastic refining extrusion granulation

(2) washing method: the pigment, water and dispersant are sanded to make the pigment particles less than 1 μ m. The control method of the phase transfer constant temperature and humidity test chamber is also similar to the method, so that the pigment E) can be correctly installed on a solid basis, transferred to the oil phase, and then dried to produce the color masterbatch. Organic solvents and corresponding solvent recovery devices are required for phase conversion. The flow chart is as follows:

fine color paste washing evaporation concentrate drying adding carrier extrusion granulation

(3) kneading method: after mixing the pigment with the oily carrier, the pigment is washed from the aqueous phase into the oil phase through kneading by taking advantage of the lipophilic characteristics of the pigment. At the same time, the surface of the pigment is coated by an oily carrier, so that the pigment is dispersed and stabilized, and the pigment is prevented from condensing

(4) metal soap method: the particle size of pigment after grinding reaches 1 μ M, and add the soap solution at a certain temperature, so that the surface layer of each pigment particle is evenly wetted by the soap until it is conditioned to be qualified, forming a layer of saponification solution. When the metal salt solution is added, it chemically reacts with the saponification layer on the surface of the pigment to form a protective layer of metal soap (magnesium stearate), so that the ground pigment particles will not cause flocculation, but protect a certain fineness. (end)