What are the differences in flame spread ratings between canvas and polyester?

Flame spread ratings are a critical factor in determining the fire safety of materials, especially in textiles like canvas and polyester. Canvas, a natural cotton-based fabric, tends to have a higher flame spread rating compared to synthetic polyester. This means canvas ignites more easily and burns faster, as natural fibers generally lack inherent flame-resistant properties.

Polyester, being a synthetic material, has a lower flame spread rating due to its chemical composition, which melts rather than sustaining an open flame. However, untreated polyester can still be flammable, and some variants are chemically treated to enhance fire resistance.

For applications requiring higher fire safety, polyester is often preferred, especially in industrial or public settings. Always check specific flame spread certifications when selecting materials for safety-critical uses. Understanding these differences helps in making informed decisions for both functional and safety purposes.