Carbon black effective against ultraviolet ray

Carbon black in the plastic industry USES one is prevent ultraviolet aging. Because carbon black have higher sex suction light, so we can effectively prevent the plastic by sunlight generate light oxidation degradation.
Carbon black in the role of ultraviolet light stabilizer: The light energy into heat energy, ultraviolet pair polyolefin particularly hazardous, proved when certain fineness carbon black concentration for 2 percent can achieve perfect ultraviolet ray shield effect. carbon black to plastic uv protection, depending on the aging of black grain size, structure and surface chemical. carbon black particle size distribution is lesser, because of its surface increases, absorb light or shading ability increases, so uv protection enhanced effects, but size less than 20nm, its protective role tend to the same level, reason is when size had hours, reverse scattering is reduced, and continue to move the light could threaten the stability of the polymer.