What are the effects of processing temperatures on the color stability of WPC outdoor trash cans?

Processing temperatures significantly influence the color stability of Wood Plastic Composite (WPC) outdoor trash cans. During manufacturing, excessive heat can degrade color pigments and polymer binders, leading to accelerated fading when exposed to UV radiation. Optimal processing typically occurs between 160-190°C, where material integrity and color retention are balanced. Temperatures below this range may cause incomplete polymer fusion, creating micro-pores that trap moisture and promote color degradation. Conversely, temperatures exceeding 200°C can cause thermal degradation of wood fibers, resulting in yellowish discoloration. Proper temperature control ensures uniform pigment distribution and enhances UV stabilizer effectiveness, ultimately extending the product's visual appeal in outdoor environments. Manufacturers must calibrate equipment precisely to maintain consistent color performance across production batches.