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Five treatment methods for uneven dispersion of black masterbatch

Views: 357     Author: Site Editor     Publish Time: 2022-04-15      Origin: Site

The position of black masterbatch in the plastic products industry is unquestionable. Most plastic products rely on black masterbatch. In other words, the black masterbatch occupies a very important role in the processing of plastic products. So what exactly is black masterbatch? Broadly speaking, the materials that make up the black masterbatch are mainly carbon black, carbon black carrier, wetting agent, dispersant and so on. The ratio and mixing of these raw materials are specific.


As the most important raw material for black masterbatch, carbon black exists in many types, and the selection should be based on actual conditions. According to the most basic classification, there are currently more than 30 varieties of carbon black, mainly rubber and non-rubber. Among rubber-based carbon blacks, wear-resistant carbon black is the most common, which can effectively improve the wear resistance of the product. Conversely, among non-rubber carbon blacks, there are only a few production inputs that meet the requirements of black masterbatch.


52-1Black masterbatches

After understanding carbon black, you have to figure out what the carbon black carrier is. The carrier is a substance that supports carbon black. The kind of raw material used in general plastic products is the kind used as a carrier. The black masterbatch produced in this way has good compatibility with plastic raw materials. For example, PS (polystyrene) plastic products, the black masterbatch carrier used is PS.


In addition to the above two main ingredients, wetting agents are also worthy of attention. Carbon black is a substance with little weight and low density. It cannot be put into processing under normal conditions, so it is necessary to wet the carbon black. Some companies use products such as paraffin wax as wetting agents, which will affect the final product effect.


The dispersant in carbon black masterbatch is mainly divided into organic and inorganic. Generally speaking, organic dispersants are used for high-end black masterbatches. This kind of masterbatches are usually used in environmentally friendly products with higher environmental requirements. The relatively low-grade black masterbatch uses inorganic dispersants such as calcium carbonate. If you think this is not a good judgment, you can see the quality of the masterbatch through the packaging. Generally, the half-bags are inorganic dispersants. Although the use of inorganic dispersants can reduce production costs, these dispersants can also accelerate the aging of plastic products.


Composition is the most basic content of masterbatch processing. After choosing the right raw materials, you need to start the formal operation. In fact, the processing method has a great influence on the final performance of the masterbatch. Taking advantage of the mechanical kneading of the internal mixer to break up the agglomerated particles, the agglomerated particle size of the carbon black particles is greatly reduced, and the particle size and distribution of the carbon black in the master batch are uniform.


According to a number of data, the black masterbatch performs very well in many aspects. The amount of black masterbatch used in the dyeing process of plastic products is very small, and the cost-effectiveness is very high. The black masterbatch can be used to form a protective film on the surface of the product to reduce the rate of product aging. The carbon black content in the product reaches 2-2.5%, and the product life span can reach more than 10 years. This is why drip irrigation products, aquatic products, and communication cable products are all black.