The four factors that determine the quality of the black Filler Masterbatch
Dispersion is high
The black Filler Masterbatch is produced using carbon black. Raw carbon black is very difficult to handle and dirty mixture, it is covered with dust, light weight, was fluffy. Unless a large-scale treatment, or it will dirty machines and workers, so that the working environment becomes dirty. Because of this, casting workers are generally selected in a resin carrier, that is, black color masterbatch to complete the pre-dispersion of carbon black. The resin carrier is clean, free flowing and easy to use. In addition, carbon black in addition to dirty, there is a feature that is difficult to disperse. If the injection mold directly to the raw carbon black melting, coloring effect will be very poor. No scattered carbon black stripes and spotted areas by the less colored place will be obvious next to the show. The standard injection molding machine can not effectively disperse raw carbon black.
Carbon black is also difficult to disperse the performance of the pigmented Filler Masterbatch manufacturers. The use of single or double screw extruders to produce high-load black color masterbatch dispersion is very poor. When the end user mixes or molds these black fillers, its performance is slightly better than carbon black, but the effect is equally unsatisfactory. In order to achieve a stable high degree of dispersion, it is necessary to mix a carbon black, such as a mixture of FCM or BANBURY, using a high standard shear machine. With sufficient strength, these mixers can mix the carbon black and the base resin completely together. The type of carbon black used also affects the dispersion. The smaller the carbon black particles, the harder the dispersion is.
The application of thin wax is the most emphasis on the requirements of the dispersion. The final product of the poor dispersion of the masterbatch can be easily seen by the naked eye from the corners. In addition to the lack of beauty, the dispersion of carbon black in the film significantly reduces the performance of black film weathering.
Coverage is stronger
The second factor in determining the mass of the black Filler Masterbatch is the covering force, which is particularly important for the color Filler Masterbatch for waste or recycled polymers. In these cases, the black effect is to cover the Other colors. Large particles of carbon black coloring ability is poor, not easy to cover all the other in the lower color, the results of the final product only get away from the color. In the process of melting, the ability to correctly select the carbon black with high coloring ability to cover the existing color is the so-called covering force.
Liquidity is better
The third factor in determining the quality of the black Filler Masterbatch is rheology and mobility. If a color Filler Masterbatch itself has good dispersion, but it can not flow into the material to be molded, the production effect is not ideal. In general, the backing resin used to produce the color Filler Masterbatch has a high rheology. In order to save costs, some color Filler Masterbatch producers use reusable materials, scrap or recycled materials as resin carriers. The flow performance of the color Filler Masterbatch thus produced will be significantly reduced, and if the rheology is not good, the mold union will have trouble in the cycle time and appearance treatment. It is worth noting that if the dispersion and rheology are not high, some end users will be compensated by increasing the dilution ratio, but this will only increase the cost of using the color Filler Masterbatch. With the minimum dilution ratio of the color Filler Masterbatch can produce a uniform, good dispersion of black.
Compatibility is big
The third factor in determining the quality of the black Filler Masterbatch. If the color Filler Masterbatch is produced using chips or recycled material, it may contain contaminants or other non-meltable polymers