How does the inclusion of natural waxes improve the water repellency of WPC outdoor trash cans?

The inclusion of natural waxes is a key factor in significantly improving the water repellency of Wood-Plastic Composite (WPC) outdoor trash cans. WPC materials, while durable, are inherently porous, allowing moisture to penetrate and cause damage like swelling, warping, and microbial growth. Natural waxes, such as carnauba or beeswax, act as a highly effective hydrophobic barrier. During the manufacturing process, these waxes are integrated into the composite blend. When the material is extruded, the wax molecules migrate to the surface, creating a microscopic, non-polar layer that actively resists water. This layer causes water to bead up and roll off the surface instead of being absorbed. This enhanced water repellency directly translates to greater durability, preventing moisture-related degradation, reducing the risk of mold and mildew, and ensuring the trash can maintains its structural integrity and appearance over many seasons of outdoor exposure.