Recycled Feedstock
Processed raw material derived from post-consumer polyethylene terephthalate containers supplies recycled polymer resin for synthetic fiber extrusion. In sustainable textile manufacturing, rPET flake forms the primary intermediate feedstock produced by sorting and shredding reclaimed plastic bottles into uniform polymer chips. These washed flakes are melted and filtered before undergoing direct melt spinning into recycled polyester staple fibers or filament yarns.
Quality laboratories test intrinsic viscosity, polyvinyl chloride contamination levels, and moisture content prior to extrusion batch acceptance.
Decontamination Standard
Washing and optical sorting processes remove residual labels and adhesive residues from recycled bottle streams. Residual PVC or metal particles present within rPET flake melt batches clog spinneret pack filters and cause filament breakage during high-speed drawing. Mechanical washing and hot caustic baths purify raw bottle flakes to industrial spinning standards.
Viscosity Retention
Thermal drying prior to extrusion prevents hydrolytic degradation of polymer chains during melting. Insufficient drying of rPET flake lowers intrinsic viscosity, reducing tensile strength and yarn tenacity in finished polyester filaments.
Spinning Performance
Polymer melt filtration removes microscopic solid inclusions before extrusion through spinneret capillaries. Spinners blend rPET flake with virgin resin to stabilize melt pressure and control dye uptake consistency across bulk production lots.
