What are the differences in fire performance between WPC and polypropylene tree boxes?

When comparing the fire performance of WPC (Wood-Plastic Composite) and polypropylene tree boxes, several key differences emerge. WPC, a blend of wood fibers and plastic, tends to have higher flammability due to its organic content, which can ignite more easily under high heat. Polypropylene, a pure thermoplastic, generally exhibits better fire resistance, as it melts rather than burns at lower temperatures.

WPC may release more smoke and toxic gases when exposed to fire, while polypropylene typically produces fewer emissions. However, polypropylene can drip when melting, potentially spreading flames. Both materials have distinct advantages and limitations in fire safety, making the choice dependent on specific environmental and regulatory requirements. Always check local fire codes before selecting tree box materials.