| Four important factors that determine the quality of black masterbatch | |
| Release time：2016/9/24 | |
Margin is generally to black masterbatch used in textile, plastics, rubber and other products, is widely used color masterbatch, here about the decision of black masterbatch quality factors. The quality of black masterbatch decided on the following factors: dispersion, covering power, rheological property, compatibility, stability, color light and shade degree. Dispersion degree to high Is to use carbon black masterbatch production. Carbon black is a mixture of students very difficult to handle and dirty, it was full of dust, light weight, fluffy. Unless the use of large-scale processing measures, otherwise it will dirty the machine and workers, so that the work environment has become dirty. Because of this, casters are generally choose in a carrier resin, black masterbatch, complete pre dispersion of carbon black. The resin carrier is clean, free flowing and easy to use. In addition, in addition to the dirty black outside, there is a characteristic that is difficult to carry out dispersion. If the injection mold directly to the raw carbon black melting, coloring effect will be very poor. No dispersion of carbon black stripes and spots on the colored region if fewer places beside clear. The standard injection molding machine can not effectively raw carbon black dispersion. This is the performance of carbon black dispersion also plagued the masterbatch manufacturer. The dispersion of high load black masterbatch using single or double screw extruder production is very poor. When end users to these black masterbatch mixed or die casting, its performance only than carbon black slightly better point, but the same effect is not satisfying. In order to achieve a high degree of stability in the dispersion, must use high levels of shear Luo machine to mixed with carbon black, such as FCM or BANBURY mixture. The use of sufficient strength, the mixer can make the carbon black and the base resin completely mixed together. The use of carbon black types also affect the dispersion of. The smaller the particle dispersion of carbon black, the more difficult it is to. The application of thin wax is the most demanding of dispersion. The final product is easy to masterbatch dispersion difference from the corner can be seen with the naked eye. In addition to the lack of beauty in the film, the poor dispersion of carbon black can significantly reduce the performance of black film anti weathering. Small particles with good and small nature are the main characteristics of the fiber industry. These fibers are used in rope, yarn, carpet and other industries. Large machines with 5000 m above the speed at the same time to produce 30000 shares of fine fiber. If the color dispersion is too bad, will lead to broken fiber, production downtime. Strong coverage To decide the second factor of black masterbatch quality coverage. For for waste or recycled polymer masterbatch, this factor is particularly important, in these cases, the role of black is to cover the other colors from waste. Large particles of carbon black coloring ability is bad, is not easy to be covered by all other colors in the lower. As a result, only get off color. In the melting process, correctly first choice has high tinting strength of carbon black to cover the existing color ability is called coverage. Liquidity is better Determine the black masterbatch quality of the third factors is the rheological properties and flowability of. If a masterbatch itself has good dispersion, but it is not able to flow into the die casting material, the effect of the production is not ideal. In general, for the rheology of backing masterbatch with high resin production. In order to save costs, some commercial masterbatch production materials reuse, waste or recycled materials as the carrier resin. So the production of masterbatch flow properties will be significantly reduced, if the flow is not good, mold Union in cycle time and appearance trouble. It is worth noting is that if the dispersion and rheological properties, some end users will by increasing the dilution ratio make up, but this approach will only increase in the cost of the masterbatch using. With the minimum dilution ratio of masterbatch can produce uniform dispersion, good black. Compatibility to large Fourth factors decide the compatibility of black masterbatch quality. If color masterbatch is using the cut chip or recycled materials produced, then it may contain contaminants or other polymer melting. |
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