What are the differences in thermal deformation between WPC and HDPE outdoor trash cans?

When selecting outdoor trash cans, understanding thermal deformation—how materials warp or change shape under heat—is crucial for long-term durability. Wood-Plastic Composite (WPC) and High-Density Polyethylene (HDPE) are popular choices, but they behave differently under temperature fluctuations.

WPC trash cans, made from wood fibers and plastic, have a higher coefficient of thermal expansion. This means they expand and contract more significantly with temperature changes. In direct sunlight, WPC can warp or develop surface cracks over time, especially if the wood content is high. The composite nature can lead to uneven expansion, potentially affecting structural integrity.

HDPE trash cans, being a uniform thermoplastic, exhibit lower thermal expansion. They are more dimensionally stable under heat, resisting warping and maintaining their shape better in varied climates. However, prolonged exposure to high temperatures can still cause slight softening or sagging, particularly in thinner-walled designs.

Key differences include: WPC generally shows greater dimensional change with temperature, while HDPE offers superior heat resistance. For hot climates, HDPE often provides better longevity, whereas WPC may require shade or specific design considerations to minimize deformation.