What are the thermal degradation thresholds of resins in outdoor chairs?

Resins used in outdoor chairs are subjected to various environmental stresses, with thermal degradation being a critical factor affecting their longevity. The thermal degradation threshold refers to the temperature at which the resin begins to break down, losing its structural integrity and mechanical properties.

Most common outdoor chair resins, such as polyethylene (PE), polypropylene (PP), and polyvinyl chloride (PVC), have thermal degradation thresholds ranging between 120°C and 180°C. However, prolonged exposure to lower temperatures (e.g., 60°C–80°C) under direct sunlight can also accelerate degradation over time. Factors like UV exposure, humidity, and chemical composition further influence these thresholds.

To enhance durability, manufacturers often add stabilizers and UV inhibitors, which can raise the effective degradation temperature. Understanding these thresholds helps in selecting the right resin for outdoor furniture, ensuring better performance in harsh climates.