1、 Black masterbatch has higher color dispersion

Black masterbatch is produced using carbon black. Carbon black is a very difficult to handle and dirty mixture, which is dusty, lightweight, and loose in shape. Unless large-scale processing methods are used, it will dirty the machines and workers, making the working environment dirty. Because of this, casters widely choose a resin carrier, which is the black masterbatch, to complete the pre dispersion of carbon black. This resin carrier is clean, flexible, and easy to use. Besides being dirty, carbon black also has a characteristic of being difficult to disperse. If the raw carbon black is directly melted during injection molding, the coloring effect will be very poor. Carbon black stripes and mottled areas without dispersion will be significantly visible when placed next to areas with less coloring. Standardized injection molding machines cannot effectively disperse carbon black.

Carbon black, which is difficult to disperse, also troubles manufacturers of coloring masterbatch. The dispersion of high load black masterbatch produced by single or double screw extruders is very poor. When the user mixes or molds these black masterbatches, their function is only slightly better than carbon black, but the same effect is unsatisfactory. To achieve a stable high dispersion, it is necessary to use a high-level shearing machine to mix carbon black, such as a mixture of FCM or BANBURY. By using satisfactory strength, these mixers can completely mix carbon black and base resin together. The type of carbon black used also affects the color dispersion. The smaller the carbon black particles, the more difficult their dispersion becomes.

The application of thin wax is subject to dispersion requirements. After all, the masterbatch with poor dispersion can be easily seen by the naked eye from the corners. In addition to its short and beautiful appearance, the carbon black with poor dispersion in the film significantly reduces the anti weathering function of the black film. Small particles with outstanding dispersion are the main feature of the fiber industry, which is used in ropes, yarns, carpets, and other industries. Large machines produce 30000 strands of fine fibers at a speed of over 5000 meters per minute. If the dispersion of the color masterbatch is too poor, it will break the fibers and cause production stoppage.

2、 Black masterbatch color has strong masking power

Another factor in determining the quality of black masterbatch is masking power, which is particularly important for masterbatches used for waste or recycled polymers. In these cases, the role of black is to mask other colors that waste guesses. The coloring ability of large particle carbon black is poor, and it is not easy to cover up all other colors on the bottom layer. After all, the product only obtains deviated colors. During the melting process, correctly selecting carbon black with high coloring ability to mask the existing color is called masking power.

3、 Black masterbatch has better activity

The third element in determining the quality of black masterbatch is rheology and activity. Generally speaking, the base resin used for producing color masterbatch has high rheological properties. In order to save costs, some color masterbatch manufacturers use reusable materials, waste materials, or recycled materials as resin carriers. The activity function of the color masterbatch produced in this way will significantly decrease. If the rheological properties are not good, the mold will encounter difficulties in cycle time and appearance treatment. It is worth noting that if the dispersion and rheological properties are not high, some users may compensate by increasing the dilution ratio, but this approach will only increase the cost of using the color masterbatch. Color masterbatch with small dilution ratio can produce uniform and well dispersed black.

4、 Black masterbatch has greater compatibility

The fourth element in determining the quality of black masterbatch is compatibility. If the color masterbatch is produced using chips or recycled materials, it may contain pollutants or other immiscible polymers.

The black masterbatch manufacturer guessed that adding anti-aging agents actually has many advantages. The black masterbatch added with anti-aging agents will not have any side effects on the product, but can actually maintain the durability and durability of the product.

The main reason for adding anti-aging agents is related to the storage and processing of black masterbatch. The carbon black used in plastic production in China, regardless of high, medium, or low pigment content, has a problem of high oxygen content, with relevant material reports reaching 3-8%. This directly affects the oxidation aging of the carrier during the processing and storage of the masterbatch. Once this aging occurs, it will directly lead to early aging of products using the masterbatch in the future. The oxidation induction period experiment fully proves this point. To avoid and alleviate this phenomenon, adding an appropriate amount of anti-aging agent is the only way to ensure the quality of black masterbatch selection.

Article source: Taishan conductive mica particles

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