What is the main feature of the black cat carbon black?

Carbon black, carbon black, is an amorphous carbon. Light, loose and extremely fine black powder with a very large surface area ranging from 10-3000 m2/g. It is a carbonaceous material (coal, natural gas, heavy oil, fuel oil, etc.) that undergoes incomplete combustion or thermal decomposition under conditions of insufficient air. And the product.

Black cat carbon black is classified into "reinforcing carbon black", "conductive carbon black", and "wearing carbon black" according to its performance. Carbon black can be used as black dye for the manufacture of Chinese ink, ink, paint, etc. It is also often used as a rubber production reinforcing agent. Carbon black is usually divided into carbon black for pigment, carbon black for rubber and conductive carbon black. And special carbon black.

China is one of the first countries in the world to produce carbon black. In ancient times, people burned animal and vegetable oils and pine branches to collect black ash from fire smoke, which was used to modulate ink and black pigment. This black ash called "炱" is the earliest carbon black.

In 1912, it was found that carbon black has a reinforcing effect on rubber, and carbon black has gradually become an indispensable raw material for the rubber industry.

Black cat pigment carbon black generally refers to carbon elemental particles, generally due to insufficient combustion of organic matter, in which hydrogen and oxygen are converted into water, and if carbon is not burned enough, it will break away from molecules and form carbon black. Carbon black in almost all particle size ranges can be obtained by the furnace black production process, and the carbon black of the same variety does not have the same particle size, and exhibits a particle size distribution range. In general, the finer particles have a narrower particle size distribution. The finer the pigment black, the more contact points between the carbon black aggregates, and the stronger the cohesive force between them, the more work is done on the dispersion when the pigment black is blended into the material, that is, the uniform distribution of the starting carbon black is started. It is large to separate the carbon black particles, and finally achieve the highest blackness and coloration.

There are two kinds of density of carbon black for black cat rubber. One is true density, which is determined by the element and structure (or crystal structure) constituting carbon black. Unless otherwise specified, the density of carbon black refers to true density; The other is the pour density or the apparent density, which varies with the processing conditions of the carbon black and needs to be measured frequently. The apparent density is mainly used to provide basis for engineering equipment and volume calculation of containers such as packaging, storage and transportation.

The carbon black having a small particle size and a high structure has a low pouring density. Carbon black with small particles, high structure, pure surface and large surface roughness has good electrical conductivity. The rubber technology network knows that when preparing conductive rubber, the amount of carbon black can not be less than a certain critical value, otherwise too little carbon black in the rubber can not form conductive channels or can not induce field emission, so that the conductivity of the rubber cannot be Meet the requirements.