What are the stress-cracking resistance tests for polyethylene outdoor seating?

Polyethylene outdoor seating must withstand environmental stress to ensure long-term durability. Key stress-cracking resistance tests include:

1. ASTM D1693 – This standard evaluates the environmental stress-cracking resistance (ESCR) of polyethylene by exposing samples to a surfactant and measuring failure time.

2. Bent Strip Test – A specimen is bent and exposed to stress-inducing agents to observe cracking under controlled conditions.

3. Notch Constant Load Test – Applies constant stress to a notched sample to assess crack propagation resistance.

4. Full-Scale Weathering Tests – Simulates outdoor conditions, including UV exposure and temperature fluctuations, to evaluate real-world performance.

These tests help manufacturers ensure polyethylene seating resists cracking, extending its lifespan in harsh outdoor environments.