The advanced computer color matching system is adopted to ensure the small color difference of the color batch, bright color, stable color, good dispersion of color powder and so on. Dyeing modification is completed once, which simplifies the production process of plastic products, facilitates processing, improves the product rate, saves costs for customers and is trusted by customers. The dyed PP material can be modified according to the requirements of customers, making pearlescent, plush, metallic color, light diffusion, antibacterial, extinction, anti aging, special optical properties, antistatic, anti-aging and other functions. Dye PP materials are widely used in the fields of medical, material and room decoration of household appliances (refrigerator, air conditioning, washing machine, microwave oven), automobile (bumper, instrument panel, door inner panel, mud guard, etc.).