How does the addition of zinc borate enhance the fungal resistance of WPC outdoor trash cans?

The addition of zinc borate significantly enhances the fungal resistance of Wood Plastic Composite (WPC) outdoor trash cans through a multi-faceted protective mechanism. Zinc borate acts as an effective fungicide and mildewstat, inhibiting the growth of mold, fungi, and algae that typically degrade organic materials in outdoor environments. When incorporated into the WPC matrix during manufacturing, zinc borate particles disperse uniformly throughout the composite material. These particles gradually release boron ions when exposed to moisture, creating an environment toxic to fungal cells while disrupting their metabolic processes. This protection is particularly crucial for the wood flour component within WPC, which would otherwise serve as a nutrient source for microorganisms. Unlike surface treatments that wear off over time, zinc borate provides long-lasting, bulk protection that persists throughout the material's lifespan. This built-in resistance prevents structural degradation, surface discoloration, and unpleasant odors, ensuring WPC trash cans maintain their integrity and appearance despite constant exposure to rain, humidity, and organic waste. The compound is especially effective against common wood-decaying fungi like brown-rot and white-rot species, making it an essential additive for outdoor WPC products requiring durable fungal protection.