What are the key factors in selecting wood fiber content for optimal WPC outdoor tree box performance?

When selecting wood fiber content for WPC (Wood-Plastic Composite) outdoor tree boxes, several key factors ensure optimal performance. First, the wood fiber percentage directly impacts durability—higher fiber content enhances strength but may reduce weather resistance. Balancing fiber content with polymer ratios is crucial for longevity. Second, consider moisture resistance; excessive wood fiber can absorb water, leading to swelling or decay. Third, UV stability is vital for outdoor use; additives or coatings may be needed to protect high-fiber composites. Lastly, the intended load and environmental conditions should guide fiber selection, ensuring the tree box withstands stress and weather extremes. By evaluating these factors, you can achieve a durable, high-performing WPC outdoor tree box.