Evaluation of fiber compositions, strength indicators, and disintegration patterns of flushable sanitary products in relevance to what is flushable

Abstract

Sanitary products (SPs) such as toilet paper and moist wipes are marketed as flushable products (FPs). SP manufacturers, wastewater authorities, and governmental agencies describe FPs in their own terms, and cause confusion about what is safe to flush with respect to sewer operations. To identify sewer-safe FPs, 11 toilet paper (TP) and 39 flushable wipe (FW) samples that were collected from around the world were examined to assess critical links between their fiber compositions, strength indicators, and disintegration performance. The findings illustrate that products that are made of primarily wood-pulp fibers have low strength, disintegrate rapidly, and are safe flushables. In contrast, products that contain strong and synthetic fibers (e.g. polyester) exhibit high strength, disintegrate slowly, and pose significant risk of accumulation in sewer systems. Suggestions are offered for product improvement and for long-term sustainability of FPs and wastewater infrastructures.