Masterbatch is a high proportion of additive and thermoplastic resin, pigments or the good dispersion of plastic colorants, it chooses the resin of colorants have good wetting and dispersing effect, and has good compatibility with being shaded material.

So the pigment in the masterbatch is one of the very important components，Plastic performance becomes worse, mostly due to ultraviolet irradiation and, especially in the presence of oxygen and moisture aging intensifies. Sunlight wavelength is 290-400 - nm called ultraviolet ray, the radiation can reach 402 kj/mol, enough to destroy the C - H key of the polymer molecules, that cause plastic performance deteriorate.

Reaction and hot oxygen aging of polymer in the uv automatic oxidation reaction, polymer pyrolysis and crosslinking, its mechanical performance is bad, at the same time, generate hydroxyl reaction product and the chromophore, adds the color change of the polymer.

People considering outdoor use of gas, membrane and so on products, usually join carbon black because the light stability of pigment for plastic products, it can produce light shielding effect.