The production process of black masterbatch is briefly introduced as follows:
1. Ink method: As the name suggests, it is a production method that uses ink paste in the production of black masterbatch, which involves three rolls of grinding and coating a low molecular protective layer on the surface of the pigment. After grinding, the fine color paste is mixed with the carrier resin, and then plasticized by a two roll plastic mixer (also known as a double roll open mill), and granulated by a single screw or double screw extruder.
2. Rinsing method: It is the process of sanding pigments, water, and dispersants to reduce the particle size of pigments to less than 1 μ m. And through phase transfer method, the pigment is transferred into the oil phase, and then dried to obtain black masterbatch particles. Organic solvents and corresponding solvent recovery devices are required for phase conversion.
3. Pinching method: It is the process of mixing pigments and oil-based carriers, using the characteristic of pigment being lipophilic, and then kneading to wash the pigment from the water phase into the oil phase. Together, the surface of the pigment is coated by an oily carrier, which disperses and stabilizes the black masterbatch pigment, avoiding pigment aggregation.
Article source: Taishan conductive mica particles
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