What impact does regrind ratio have on the strength of recycled polypropylene bar stools?

The regrind ratio plays a critical role in determining the strength and durability of recycled polypropylene bar stools. When polypropylene is recycled, the proportion of regrind material (reprocessed plastic) mixed with virgin material significantly influences the final product's mechanical properties. A higher regrind ratio often leads to reduced tensile strength and impact resistance due to polymer degradation during multiple processing cycles. However, optimizing the ratio can balance sustainability and performance. Studies suggest that keeping the regrind ratio below 30% helps maintain structural integrity while still promoting eco-friendly manufacturing. Understanding this balance is essential for producing durable, high-quality recycled polypropylene bar stools without compromising sustainability goals.