How does the inclusion of talc or calcium carbonate fillers affect WPC tree box properties?

Wood-Plastic Composite (WPC) tree boxes are widely used in urban landscaping due to their durability and eco-friendliness. The inclusion of fillers like talc or calcium carbonate significantly alters their properties. Talc, a mineral filler, enhances stiffness and heat resistance, making WPC tree boxes more rigid and dimensionally stable. Calcium carbonate, on the other hand, improves impact strength and reduces production costs while maintaining decent mechanical performance.

Both fillers affect the composite's density, water absorption, and weathering resistance. Talc-filled WPCs exhibit lower moisture uptake, prolonging lifespan in humid conditions. Calcium carbonate increases weight but improves machinability and surface finish. However, excessive filler content may reduce tensile strength, requiring careful formulation balancing.

Ultimately, the choice between talc and calcium carbonate depends on the desired balance between cost, performance, and environmental exposure. Understanding these effects helps optimize WPC tree box designs for specific applications.