What are the thermal expansion coefficients of resins used in outdoor chairs?
Resins used in outdoor chairs must withstand varying temperatures, making their thermal expansion coefficients a critical factor in durability. Common resins like polyethylene (PE), polypropylene (PP), and polyvinyl chloride (PVC) exhibit different expansion rates when exposed to heat. For instance, PE has a thermal expansion coefficient of around 200 x 10^-6 /°C, while PP ranges between 100-150 x 10^-6 /°C. PVC, often used for its rigidity, has a lower coefficient of about 50-80 x 10^-6 /°C. These values influence material selection for outdoor furniture, ensuring stability and longevity under temperature fluctuations. Understanding these properties helps manufacturers design chairs that resist warping or cracking in extreme weather conditions.
