Six key points determining the quality of black masterbatch
black masterbatch is produced with carbon black. Carbon black, which is difficult to disperse, has been plagued by coloring masterbatch production. 2. Precautions for pressure testing machine measurement manufacturers. The dispersion of high load black masterbatch produced by single or double screw extruders is very poor. When end users mix or mold these black masterbatches, its performance is only slightly better than carbon black, but the effect is also unsatisfactory. In order to achieve a stable high dispersion, a high-level shear mixer must be used to mix carbon black, such as a mixture of FCM or Banbury. With sufficient strength, these mixers can completely mix carbon black and base resin together. The carbon black used by the CIRC will significantly reduce the specific regulatory type of the application proportion of insurance funds, which also affects the dispersion of coloring. The smaller the carbon black particles are, the harder the dispersion is
second, strong coverage
the second factor that determines the quality of black masterbatches is coverage, which is particularly important for masterbatches used in waste or recycled polymers. In these cases, the role of black is to cover other colors in waste. The coloring ability of large particle carbon black is poor, and it is not easy to cover all other colors in the lower layer. As a result, the final product only gets deviated colors. During the melting process, Correctly choose carbon black with high coloring ability to cover the present "Every face has its own emotions and stories, and the ability to have color is the so-called covering power.
Third, good fluidity
the third factor that determines the quality of black masterbatch is rheology and fluidity. If a masterbatch itself has good dispersivity, but it cannot flow into the material to be molded, the production effect is not ideal. Generally speaking, the priming resin used to produce masterbatch has high Rheology of. In order to save costs, some color masterbatch manufacturers use reused materials, waste or recycled materials as resin carriers. The flowability of the color masterbatch produced in this way will be significantly reduced. If the rheology is not good, the mold Union will encounter problems in cycle time and appearance treatment. It is worth noting that if the dispersion and rheology are not high, some end users will make up for it by increasing the dilution ratio, but this practice will only increase the use cost of color masterbatch. The color masterbatch with the minimum dilution ratio can produce uniform and dispersive black
IV. greater compatibility
the size of compatibility is the fourth factor that determines the quality of black masterbatch. If the color masterbatch is produced from chips or recycled materials, it may contain pollutants or other non fusible polymers. This will cause some unforeseen and difficult problems, and waste the time and raw materials of the final consumer. At this time, the priming resin can be selected to produce high-quality color masterbatch, which has good compatibility in the melting process. High quality masterbatches can be produced with LLDPE, LDPE, HDPE, PP, PS, San, PA and other materials. If engineering grade and strict physical properties have been indicated, special polymeric color masterbatches can be obtained. Several large international color masterbatch manufacturers are conducting research to produce the so-called "global universal" color masterbatch. These masterbatches can be widely compatible with other raw materials, and have good grade, specification and state of material a; It can be applied flexibly
v. stability should be consistent
in today's international economy, it is absolutely necessary for international customers to have high requirements for the quality of color masterbatches and the stability of raw materials, which is also the fifth factor that determines the quality of black masterbatches. A major performance of stability is a stable carbon black ratio. If the percentage of carbon black fluctuates, the number of masterbatches that need to be melted is different, and it is impossible to produce products with the same color tone. Some final producers reported that in the production process, the dilution ratio required is usually% different, which is obviously unacceptable. Of course, other factors such as the fluidity and dispersion of the injected melt should be consistent with the feeding amount of each batch
VI. the lightness and darkness should be clear.
the last factor that determines the quality of black masterbatch is the lightness and darkness of color. There are various types of carbon black on the market that can be used for coloring masterbatches, but the colors and prices of various types are also very different. Large particle carbon black has lower tint and different background colors than small particle carbon black. Large particle color masterbatch is suitable for the production of film such as garbage bags, but it is not suitable for the production of products that pay attention to beauty, such as TV signs or places that need UV protection, such as agricultural film or external pipes. For these products, only small particle carbon black with higher price can be used. In addition, low transparency is also a characteristic of small particle carbon black
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