Recoloring polyester with supercritical CO₂ could simplify fiber-to-fiber recycling

T2Covered by 1 source · first reported by Phys.org / ScienceDaily (tech) at 22 Oct, 20:20 UTC

Colored polyester is difficult to recycle because the dyes are hard to remove without using large quantities of chemicals, water or energy. Researchers have developed a supercritical carbon dioxide treatment that redistributes existing dyes between polyester fibers, creating uniform colors without…