What are the vapor transmission rates of polyethylene outdoor seating materials?

Polyethylene is a popular material for outdoor seating due to its durability, weather resistance, and low maintenance. One critical property of polyethylene outdoor seating is its vapor transmission rate (VTR), which measures how well moisture passes through the material.

The vapor transmission rates of polyethylene can vary depending on density and manufacturing processes. High-density polyethylene (HDPE) typically has lower vapor permeability, making it more resistant to moisture absorption, while low-density polyethylene (LDPE) may allow slightly higher vapor transmission.

For outdoor furniture, a lower vapor transmission rate is often preferred to prevent moisture buildup, which can lead to mold, mildew, or material degradation. However, some breathability is beneficial to avoid condensation. Manufacturers may use additives or coatings to optimize moisture resistance while maintaining comfort.

Understanding these rates helps in selecting the right polyethylene material for long-lasting, high-performance outdoor seating.