How does the resistance to warping of polypropylene compare to polyethylene in outdoor tables?

When selecting materials for outdoor tables, resistance to warping is a critical factor, especially under varying weather conditions. Polypropylene and polyethylene are two commonly used plastics, each with distinct properties. Polypropylene is known for its high resistance to warping due to its semi-crystalline structure, which provides excellent dimensional stability. This makes it less likely to deform under heat or moisture, making it a preferred choice for outdoor furniture. On the other hand, polyethylene, while durable and flexible, is more prone to warping over time when exposed to prolonged sunlight and temperature fluctuations. Its lower melting point and less rigid structure contribute to this susceptibility. For outdoor tables, polypropylene generally outperforms polyethylene in maintaining shape and structural integrity, ensuring longevity and reliability in harsh environments.