For urban outdoor leisure chairs, the compression set test is critical to evaluate the long-term durability and comfort of seat surface elastic materials like polyurethane foam or elastomers. Key international standards include ASTM D3574 Test D (primarily used in North America) and ISO 1856 (common in Europe and internationally). These standards measure the material's ability to recover its original thickness after being subjected to a constant compressive strain for a set time and under specific conditions (e.g., 70 hours at 70°C). A low compression set percentage indicates good resilience and longevity, essential for public furniture facing continuous use and weather variations. Manufacturers rely on these tests to ensure products maintain comfort and structural integrity over years of outdoor exposure.
What are the compression set test standards for the seat surface elastic material of urban outdoor leisure chairs?
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