Dispersion requirements of black masterbatch

Carbon black is used to produce black masterbatch. Raw carbon black is a dirty mixture that is difficult to handle, covered with dust, light and fluffy. Unless large-scale disposal measures are taken, it will dirty machines and workers and make the working environment Get dirty. Because of this, casters generally choose to pre-disperse carbon black on a resin carrier, namely black masterbatch. This resin carrier is clean, free-flowing and easy to work with. In addition, carbon black in addition to In addition to being dirty, another feature is that it is difficult to disperse the color. If the carbon black is directly melted during injection molding, the coloring effect will be poor. If the carbon black stripes and spots without dispersion are close to the place with less coloring, it will be obvious Appears. Standard injection molding machines cannot effectively disperse carbon black.

The difficulty of dispersion of carbon black also plagues color masterbatch manufacturers. High-load black masterbatches produced by single or twin-screw extruders have poor dispersion. When end users mix or mold these black masterbatches, their performance Only slightly better than carbon black, but the effect is not satisfactory. In order to achieve stable high dispersion, carbon black must be mixed with a high-level shearing machine, such as a mixture of FCM or BANBURY. These mixers use sufficient strength , so that the carbon black is completely mixed with the base resin. The type of carbon black also affects the dispersion. The smaller the carbon black particles, the harder the dispersion.

The application of thin wax pays most attention to the dispersion requirements. It is easy to see the final product of the masterbatch with poor dispersion from the corner. In addition to the lack of aesthetic feeling, the carbon black with poor dispersion in the film significantly reduces the windproof performance of the black film. It has good dispersion Small particles are the main feature of the fiber industry. These fibers are used in rope, yarn, carpet and other industries. Large machines produce 30,000 strands of fine fibers at a speed of more than 5,000 meters per minute. If the masterbatch dispersion is too poor, the fibers will breakage, resulting in a production stoppage.