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Some knowledge about carbon black masterbatch

Views:70     Author:Site Editor     Publish Time: 2017-06-03      Origin:Site

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1.composition of black masterbatch?

Composition of black masterbatch materials are: A. carbon black; B. carbon black carrier; C. carbon black wetting agent; D. carbon black dispersant; E. other processing aids.


2.What is the carbon black carrier?

The carrier is a substance that carries carbon black. What kind of raw materials are used in general plastic products, and what raw materials are used for the carrier? This made the black masterbatch and plastic raw materials compatibility is better. Such as: PS (polystyrene) plastic products, the use of black masterbatch carrier is PS. For polyethylene plastic products, the carrier is polyethylene.

However, the general use of LDPE (high pressure polyethylene), because LDPE carrying carbon black the strongest, and processing performance. While other polyethylene HDPE and LLDPE can only produce low concentrations of black masterbatch. For PP (polypropylene) plastic products, only use PP and LDPE as the carrier of the black masterbatch, but can not use HDPE and LLDPE and other plastic as the carrier of black masterbatch. Of course, also useful to recover the material to do the carrier of the black masterbatch.


3.What are the processing methods for black masterbatch?

There are three ways to process: single screw method, double screw method and close love method.

Single screw method: the use of mixing machine to mix the material, by a single screw extruder pull granulation, the general carbon black concentration of 18-20%, backward technology, the production site of poor environmental conditions, is eliminated technology, do not rule out Some small factories have just started using this method of processing.

Twin screw method: the use of mixing machine to mix the material, the twin-screw extruder pull or water ring granulation, due to the twin-screw machine itself is limited mixing capacity, masterbatch general carbon black concentration of 25-32%.

Mixing method: the use of mixing machine to mix the material, add the mixer after kneading, and then fed by the feeder twin screw extruder, by water ring or underwater pelletizing, masterbatch general carbon black concentration in the 40- 45%.


4.What are the highlights of the black masterbatch in what areas?

In the plastic products dyeing, black masterbatch only 0.6% -0.8%, it will be extremely black, and then will not be more black. According to the test data show that in the ** area outdoor use of products, such as the need to rely on black masterbatch anti-aging, as long as the use of high-quality black masterbatch (rather than back to do carrier, white oil wetting, calcium carbonate dispersion, grain).

Carbon black in the product content of 2-2.5%, that is: every 100 kilograms of raw materials, 5-6 copies (weight) of carbon black 40% of the masterbatch, the role played far more than any anti-aging products, Product life can reach more than 10 years.

This is why drip irrigation products, water products, communications cable products are black. In addition, carbon black on the strength of the product increased, enhanced conductivity and other aspects have a special contribution.


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