The actual amount of masterbatch of different quality in the production process is different. We have to determine the addition amount according to the addition ratio marked on the product packaging bag and the effect we want to achieve:

　　 (1) In actual production, about 2 parts of masterbatch are generally used, and anti-aging additives are added to use the synergistic effect of anti-aging and carbon black to prevent aging to reduce product costs.

　　 (2) The length of outdoor use and the requirements of product life also determine the appropriate reduction of the amount of masterbatch used. The premise is that the carbon black must form a continuous phase in the product, that is, there is a carbon black "film" to protect the plastic. If too little is added, the carbon black phase (that is, the part with high concentration of small pieces) is discontinuous in the product. At the boundary between the phases, the plastic molecules are fragile and are directly hit by ultraviolet light. The carbon black absorbs heat to increase the surface temperature of the product. Accelerate the oxygen aging reaction. At this time, carbon black is like an impurity in the product, so it is better not to add it. When the boundary between phase and phase is less than 280 nm, it can avoid the impact of ultraviolet light, and the product is safe.

　　Actually, we add color masterbatch to plastic products, the purpose is to obtain satisfactory coloring effect, so as long as we choose the amount of product added to make the surface of the product uniform, without streaks and spots.