Explanation

It is a kind of substance that can absorb, shield or reflect ultraviolet light, such as carbon black, titanium dioxide (rutile type), zinc oxide, etc. It acts as a barrier between polymer and light radiation, preventing light from radiating directly to the inside of polymer, preventing the inside of polymer from being damaged by ultraviolet rays, thus effectively inhibiting photo-oxiclative degradation. light screening agent includes carbon black, titanium oxide and other inorganic pigment, and phthalocyanine blue, phthalocyanine green and other organic pigment, of which carbon black has the best shielding effect. The light shielding effect of carbon black is related to its particle size, dispersion and dosage.

Classification