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Type Of Carbon Black Used In Black Parent Grains
Dec 19, 2018

1, the composition of the black mother grain?
The materials that make up the black parent grains are: A. carbon black; B. Carbon black carriers; C. Carbon black moisturiser; D. Carbon black dispersants; E. Other processing Auxiliaries.
What kind of carbon black is used for black mother grains?
According to the International classification, China has more than 30 varieties. It is mainly divided into two categories: rubber and non-rubber. Carbon black is a rubber reinforcing agent, which can effectively improve the wear resistance of rubber tires and the physical and mechanical properties of rubber products; In non-rubber carbon black, there are only a few types of carbon black that can really be used as black parent particles.
Carbon black with groove method is most widely used in plastics, which is mainly due to its rich source, high purity and small particle size. Among them, it is divided into high pigment carbon black(particle size 9-17 nm), medium pigment carbon black(particle size 18-25 nm) and low pigment carbon black(particle size 26-37 nm).
Due to different carbon black varieties, the prices vary greatly. Because of its active nature, carbon black particles rarely exist as primary particles, and almost all exist as cluster particles with a certain range of particle sizes.
3, carbon black carrier is how to return a responsibility?
The carrier is a substance that carries carbon black. What raw materials are used in plastic products in general, and what raw materials are used by carriers. The black parent grains manufactured in this way have good compatibility with plastic raw materials. For example: PS(polystyrene) plastic products, the black mother grain carrier used is PS. For polyethylene plastic products, the carrier is polyethylene.
However, LDPE(high pressure polyethylene) is generally used because LDPE has the strongest carbon black capacity and good processing performance. Other polyethylene HDPE and LLDPE can only produce low concentration black particles. For PP(polypropylene) plastic products, only the black parent particles of PP and LDPE as carriers can be used, but the black parent grains of HDPE and LLDPE and other plastics as carriers can not be used. Of course, there are also black parent grains that use recycled materials as carriers.
Why does carbon black need moisturizer?
The carbon black specific gravity is about 2g/cm. Because the carbon black particle size is very small, the performance density is very small and it appears to be fluffy. It seems to be very light. To process smoothly, carbon must first be black wet. The choice of moisturisers is crucial. In order to reduce costs, a large number of companies use products such as white oil or paraffin, which can seriously affect the strength of processed products.

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