What are the elongation-at-break metrics for polypropylene outdoor seating?

Polypropylene (PP) is a popular material for outdoor seating due to its durability, lightweight nature, and resistance to moisture and UV rays. One critical metric for evaluating its performance is elongation-at-break, which measures how much the material can stretch before breaking. Typically, polypropylene has an elongation-at-break range of 100-600%, depending on its formulation and additives.

For outdoor seating, higher elongation-at-break values indicate better flexibility and impact resistance, making the furniture more resilient to stress and deformation. However, excessively high elongation can sometimes reduce stiffness, so manufacturers balance this property with other factors like tensile strength.

Understanding these metrics helps in selecting the right polypropylene grade for long-lasting, weather-resistant outdoor furniture. Testing standards such as ASTM D638 ensure consistent measurement of elongation-at-break for quality assurance.