首之国产AV医生和护士小芳|亚洲精品久久久久中文字小说|国产精品尤物自在拍|国产乱人激情视频在线观看

1、 The dispersion should be high

Black masterbatch is produced using carbon black. Carbon black is a very difficult to handle and dirty mixture, which is covered in dust, lightweight, and loose in shape. Unless large-scale processing measures are adopted, it will dirty the machines and workers, making the working environment dirty. Because of this, casters often 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. In addition, 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 ultimately mixes or molds these black masterbatches, its function is only slightly better than carbon black, but its effect is equally 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 utilizing the required strength, these mixers can 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.

2、 Strong masking power is necessary

Another factor in determining the quality of black masterbatches 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 base layer. Ultimately, the product only gets a deviated color. During the melting process, correctly selecting carbon black with high coloring ability to mask the existing color is called masking power.

3、 Good activity

The third factor in determining the quality of black masterbatch is rheology and activity. If a color masterbatch itself has outstanding dispersibility, but it cannot move into the material to be molded, then the effect of production is not ideal. 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 be significantly reduced. 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 will eventually compensate by improving the dilution ratio, but this approach will only increase the cost of using the color masterbatch. A color masterbatch with a smaller dilution ratio can produce uniform and well dispersed black.

4、 Greater compatibility is required

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. This will cause some unexpected and difficult to constrain troubles, wasting ultimately the customer's time and materials. At this point, it is possible to use a base resin to produce high-quality color masterbatch, which has outstanding compatibility during the melting process. Good color masterbatch can be produced using LLDPE, LDPE, HDPE, PP, PS, SAN, PA, and other materials. If engineering grade and strict physical functions have been specified, then special polymer color masterbatch can be obtained. Several large international color masterbatch manufacturers are conducting research in order to produce the so-called ""a;"; Global universal; Color masterbatch. These color masterbatches can be widely compatible with other materials, have outstanding mobility, and can be flexibly applied.

5、 Stability needs to be consistent

In today's international economy, it is necessary for international customers to have high requirements for the quality of color masterbatch and the stable function of raw materials, which is also the fifth factor determining the quality of black masterbatch. A primary manifestation of stability is a stable carbon black ratio. If the percentage of carbon black fluctuates, then the number of color masterbatches that need to be melted is not the same, and it is also impossible to produce products with the same color tone. Some final producers have reported that the dilution ratio required by chemicals usually varies by 5-8%, depending on how much information the color masterbatch manufacturer has invested in the production process. This is obviously an unbearable situation. Of course, other factors such as the activity and dispersion of molten injection should be consistent with the feeding amount of each batch.

6、 Clear brightness and darkness are necessary

The next factor that determines the quality of black masterbatch is the brightness of the color. There are various types of carbon black available in shopping malls for coloring masterbatches, but the colors and prices of each type also vary greatly. Large particle carbon black has lower chromaticity and different background colors compared to small particle carbon black. Large particle color masterbatch is suitable for producing products such as garbage bag films, but not for producing products that focus on aesthetics, such as TV signs or places that require UV protection, such as agricultural films or external pipes. For these products, the only option is to use expensive small particulate carbon black. In addition, low transparency is also a characteristic of small particulate carbon black.

7、 Classification and application scope of general carbon black

SRF carbon black is generally used for the production of garbage bags that do not require strong coloring power, high masking power, or UV maintenance. The color tends to be grayish blue, inexpensive, and relatively easy to disperse, so small master batch factories equipped only with single or double spiral extrusion machines will choose this type of carbon black. The particle size of HAF carbon black is half that of SRF carbon black particles, but the coloring intensity is twice that. It is brownish red in color, and its UV maintenance ability is significantly stronger than SRF carbon black, and its cost is lower than P carbon black. It has outstanding masking power and can be applied in many aspects. P carbon black is suitable for UV protection and in the food industry, with a red blue color. JET carbon black has a satisfactory color brightness, appearing as a deep, glossy black. Its particles are small but not easily dispersed. Only manufacturers equipped with shear mixers can achieve consistent color dispersion when using JET carbon black. It is also valuable in general carbon black. Cost comparison shows that more expensive color masterbatch can economically achieve better production performance than cheaper color masterbatch.

Article source: Taishan conductive mica particles

http://www.water-i.com