One of the primary challenges in repurposing polymeric textile waste into biodegradable composites is ensuring material quality and mechanical performance. The physical and chemical properties of synthetic fibers (e.g., polyester, nylon, spandex) are often altered by dyes, finishes, and other treatments applied during textile manufacturing. These modifications can negatively impact the compatibility of textile waste with biodegradable polymers and reduce the strength, flexibility, and durability of the final composite .