The benefits of the importance of pigment carbon black in plastics

Plastics are relatively common in life, but if they are exposed to the sun for a long time, the damage to plastics is great. If you want to prevent them better, you need to use pigment carbon black.

The protective effect of pigment carbon black on UV aging of plastics depends on the particle size, structure and surface chemistry of carbon black.

When the particle size of pigment carbon black is smaller, the absorption or shading ability of carbon black increases due to the increase of surface area, so the UV protection effect is enhanced. When the particle size is less than 20 nm, the protective effect tends to be consistent, because when the particle size is too small, the backscattering decreases, and the forward light will threaten the stability of the polymer. Low structure, i.e. small aggregate particle size, will enhance the protective effect of the polymer due to the small geometric volume of the aggregate, which is also the reason for the black color of low structure carbon black. The surface of pigment carbon black contains more oxygen groups, that is, the volatile content is higher, which can eliminate the gene of polymer decomposition, so the protective effect is also enhanced.

Through experiments, it was concluded that the color of the polymer material can reflect the ultraviolet light, so that it cannot enter the interior of the material, like a shielding layer, which can avoid photoaging. Pigment carbon black, zinc oxide, cadmium red, cadmium yellow, phthalocyanine white. Powder and organic pigments phthalocyanine blue, phthalocyanine green have this effect, of which pigment carbon black has better effect. The addition of carbon black to rubber can play a role in reinforcement and anti-aging, so there is no need to add anti-aging additives, and the same is true for adding carbon black to plastic.