How does the stiffness of WPC compare to resin for bench armrest design?

When designing bench armrests, material stiffness is a critical factor influencing durability and comfort. Wood-Plastic Composite (WPC) and resin are two popular choices, each with distinct properties. WPC, a blend of wood fibers and plastic, offers moderate stiffness—firmer than pure plastic but less rigid than solid wood. This makes it a balanced option for armrests, providing structural support while maintaining some flexibility.

Resin, particularly high-density polyethylene (HDPE), tends to be more flexible than WPC, which can be advantageous for ergonomic designs but may lack the rigidity needed for heavy-duty use. However, reinforced resins or fiberglass-infused variants can approach WPC's stiffness.

For outdoor applications, WPC's resistance to warping and moisture often makes it preferable, while resin's lightweight and moldability suit curved or intricate designs. Ultimately, the choice depends on the desired balance between stiffness, weight, and environmental resilience.