Melt Recycling of Poly(lactic Acid) Plastic Wastes to Produce Biodegradable Fibers

The conventional recycling methods of poly(lactic acid) (PLA) wastes (composting and depolymerization) are expensive and difficult methods. In this article, the melt recycling of PLA plastic wastes to produce biodegradable PLA fibers by a melt spinning process was studied. Melt spinning quality, mechanical, structural, thermal, surface morphological and dyeing properties of the PLA fiber samples were characterized. The results showed that melt spinning of PLA fibers from recycled wastes with acceptable properties is possible. The drying pretreatment of the recycled PLA flakes, melt extrusion temperature and drawing operation had important effects on the mechanical and structural properties of the r-PLA fibers.