Before selecting suitable carbon black, we must confirm their uses, for example for coloring, anti-UV, etc., or conductive.
 
Coloring carbon black
 
Carbon black pigment can better color plastic, optional carbon black pigment or coloring characteristics according to the physical and chemical properties. The choice of carbon black with black are based on blackness must be reached. With very fine carbon black pigment can complete blackness particularly high coloring; PE garbage bags, plastic bags, cable materials and the like product only need moderate levels of blackness, you can use a lower specific surface area, high structure carbon black varieties ; plastic color, small errors that occur when carbon weighing and batching, will result in a clear color, therefore, should adopt the larger particle size, poor color strength low carbon black pigment, so the amount of carbon black can be a little large, weighing error is relatively small, and there is good dispersion, low-cost advantages. For gray plastic, the use of carbon black pigment granules are often presented with a gray-brown, while the use of coarse particles of carbon black pigment can produce bluish gray. Compared with other organic pigments, carbon black dispersed in addition to the more difficult, the other properties are better. Science blending amount of carbon black, can provide good antistatic or conductive.
 
Carbon black is essentially non-toxic, but easier to fly and pollution, so often in the form of master batches for the plastics industry use, while eliminating pollution also improved dispersion of carbon black in plastic.
 
Carbon black as a pigment for plastics commonly use forms of powder and granular. Granular black flying less, but more difficult to disperse, so use powdered carbon black coloring plastics.
 
The application of UV protective
 
One use of carbon black in the plastics industry is anti-UV aging, due to a higher carbon black light absorbing, which can effectively prevent the plastic by sunlight to produce photo-oxidation degradation. Black UV stabilizers in plastics as a role are: light energy into heat; plastic surface protection against certain wavelengths of radiation exposure; while the interception of radical anti-aging effects, thus preventing the catalytic degradation. Particularly harmful ultraviolet rays of the polyolefin, the test proved when the concentration of certain fineness of carbon black can achieve perfect two percent when the UV shielding effect.
 
Black plastic protective effect against UV aging, depending on the particle size of the carbon black, the structure and surface chemistry. The smaller particle size carbon black, because the surface area increases, the ability to absorb light or shading increased, so the enhanced role of UV protection, but the particle size of less than 20nm, and its protective effect tends to the same level, because when the particle size is too small, the reverse scattering is reduced, and continue to move the light would threaten the stability of the polymer.
 
The lower structure, i.e., the aggregate size is small, because of the geometric volume aggregates smaller, will enhance the protective effect of the polymer, which is a low structure carbon black darker reasons.
 
Carbon black surface containing groups are more volatile that higher can eliminate genes generated during decomposition of the polymer, and therefore also enhanced the protective effect.

Carbon black other application and uses, please refer our last report. For different mesh carbon black powder application, and carbon black processing, please refer http://www.vertical-mill.net/Successful_Case/276.html