Look at the quality of masterbatch have the recipe
Release time：2016/9/23
How to look at the quality of masterbatch? From the following seven trying to be difficult to master.
I. higher degree of dispersion
The use of carbon black toblack masterbatchproduction. Raw carbon black is very tricky and dirty mixture, it is covered with dust, light weight, was fluffy. Unless large-scale treatment measures, otherwise it will stain the machine and workers, the working environment becomes dirty. Because of this, caster generally selected on a resin carrier, which is black masterbatch to complete the pre-dispersion of carbon black. The resin carrier is clean, free-flowing and easy to use. In addition, the carbon black in addition to dirty, there is a feature that is difficult to dispersion. If the injection molding directly to the raw carbon black melting, coloring effect will be very poor. No dispersion of carbon black stripes and spots region against coloring if less obvious places will show up next. Standard injection molding machine can not be effective dispersion of raw carbon black.
This is difficult to dispersion properties of carbon black also plagued masterbatch manufacturer. Use single or double screw extruder machine production of high-load black masterbatch dispersion is very poor. When these black masterbatch mixing or molding the end user, it is only slightly better performance than that of carbon black, but the effect was equally unsatisfactory. In order to achieve a stable highly dispersive, you must use a high level of shear Ta River sealing machine to mixed carbon black, such as a mixture of FCM or BANBURY. With sufficient strength, these mixers can make carbon black and the base resin mixed together completely. The type of carbon black used also affects dispersion of. The smaller the particles of carbon black dispersion on the more difficult.
II. Covering force stronger
Determine the quality of black masterbatch The second factor is the covering force, for masterbatch for scrap or recycled polymers, this factor is particularly important in these cases, black role is to cover other wastes Colour. Coloring ability of large particles of carbon black poor and difficult to cover all the other colors in the underlying results of the final product only get deviated colors. In the melting process, the right to choose first carbon black having a high coloring capability to cover the capacity of existing colors is called covering power.
III. Liquidity is better
Determine quality of black masterbatch A third factor is the rheology and mobility. If a masterbatch itself has a good dispersion properties, but it does not flow into the material to be molded, it produced the effect is not ideal. In general, for the production of masterbatch base resin has a high rheology. To save costs, some of masterbatch production of commercial material reusable scrap or recycled materials as resin carrier. The flow properties of masterbatches so produced will be significantly reduced, if the rheology is not good, mold union trouble on cycle time and the appearance of the treatment. It is worth noting that if the dispersion and rheological not high, some end-users will be by increasing the dilution ratio to compensate, but this will only increase the cost of masterbatch. Masterbatch having minimum dilution ratio can produce a uniform dispersion of good black.
IV. Compatibility larger
Compatibility black masterbatch quality decisions fourth factor. If you are using masterbatch chips or recycled materials produced, then it may contain contaminants or other non-meltable polymer. This will cause some unpredictable and difficult constraint trouble, wasted time and materials final consumer. In this case, you can use to produce high-quality rendering resin masterbatch, masterbatch in the melting process have good compatibility. You can use high-quality masterbatch LLDPE, LDPE, HDPE, PP, PS, SAN, PA, and other materials to produce. If you have specified project-level and rigorous physical properties, then the special polymer masterbatch could be obtained. Several large international masterbatch producers, are conducting research in an attempt to produce a so-called "global universal" masterbatch. The masterbatch can be broad tolerance and other raw materials, has good mobility, can be applied flexibly.
V. Stability to be consistent
In today's globalized economy, international customers masterbatch quality, raw materials that require high performance and stability is absolutely necessary, this fifth factor in determining the quality of black masterbatch. Stability is a major manifestation stable carbon black proportion. If the percentage of carbon black is fluctuating, the number of required molten masterbatch is not the same, to produce the same color of the product can not be. Some end producers reflect: dilution of their requirements have 5-8% difference than usual, depending on the time of manufacture masterbatch manufacturers put much material. Obviously, this is unacceptable. Of course, other factors such as liquidity injected into the melt and the dispersion properties should be consistent with each batch of feeding amount.
VI. Shading to clear
The final factor in determining the quality of the black masterbatch color shades. There are various types of carbon black masterbatch can be used for coloring on the market, but all kinds of colors and prices are also very different. Large particles than small particles of carbon black carbon black has a lower degree and a different colored background. Large particles masterbatch suitable for film production such as garbage bags, but not for those who focus on the production of beauty products, such as TV signboards or need UV protection film or topical areas such as agricultural pipe. For these products, only the use of higher-priced small particles of carbon black. In addition, the low transparency is also a trait of small particles of carbon black.
VII. Common classification of carbon black and applications
SRF carbon black is generally used that do not require strong coloring power, high coverage or to UV protection garbage bag production. Colors tend to gray blue, cheap and relatively easy to dispersion, so those only equipped with a single or twin screw extruder masterbatch small firms would choose such a carbon black. HAF carbon black particle size is half SRF carbon black particles, but it is twice as tinctorial strength. Brownish-red, its UV protection was stronger than carbon black SRF, and cost less than the P carbon black. It has good covering power, it can be applied in many ways. P carbon black is suitable for UV applications as well as the food industry, it was red and blue. JET carbon black has the most satisfactory color shading, dark, lustrous black. It is the smallest particles, but not easy to dispersion. Only those manufacturers shear mixer equipped with efficient dispersion of the agreement is available when using the JET carbon black. It is also the most expensive ordinary carbon black. Cost comparison shows that more expensive masterbatch get better results than the cheapest masterbatch production can be economically.
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