What are the flexural rigidity ratings of canvas material in outdoor trash cans?

Flexural rigidity is a critical property determining how outdoor trash cans withstand mechanical stress and environmental factors. Canvas materials typically demonstrate moderate flexural rigidity ratings ranging between 2-15 GPa·mm⁴ depending on fabric density and treatment methods. Unlike rigid plastics or metals, canvas offers unique flexibility that allows slight deformation under load while maintaining structural integrity. This property proves particularly valuable in outdoor settings where temperature fluctuations and impact forces require material adaptability. Commercial-grade canvas trash cans often incorporate polyester blends with waterproof coatings, achieving rigidity ratings of approximately 10-12 GPa·mm⁴. These ratings ensure sufficient resistance to wind loading, accidental impacts, and snow accumulation while preventing permanent deformation. Manufacturers measure this property using standardized ASTM D790 bending tests, evaluating how the material withstands stress across varying humidity and temperature conditions. Higher rigidity ratings correlate with better shape retention but may reduce impact absorption capabilities. Optimal canvas formulations balance moderate flexural rigidity (8-10 GPa·mm⁴) with tear strength and UV resistance, creating durable outdoor waste receptacles that maintain functionality through seasonal changes and physical demands.