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Chemical fiber-to-fiber recycling of textiles does exist; however in limited scale and generally not for mixes
generally not for mixes of natural and synthetic fibers, mainly due to the differences in the fiber
the fiber regeneration processes (dissolution versus melting) (Östlund et al., 2015). The Japanese Teijin-
Japanese Teijin-process, which is able to handle mixes of 80 percent polyester and 20 percent cotton,
20 percent cotton, forms an exception. This process is however very sensitive, and only uses Teijin
uses Teijin products as input. The existing chemical recycling processes are summarized in
𝑆𝑐𝑜𝑟𝑒𝐴𝑠𝑝𝑒𝑐𝑡 𝑥 = 𝑆𝑢𝑚 𝑜𝑓 𝑣𝑎𝑙𝑢𝑒𝑠 𝑔𝑖𝑣𝑒𝑛𝐴𝑠𝑝𝑒𝑐𝑡 𝑥
𝑁𝑜. 𝑜𝑓 𝑎𝑛𝑠𝑤𝑒𝑟𝑠𝐴𝑠𝑝𝑒𝑐𝑡 𝑥 − 𝑁𝑜. 𝑜𝑓 𝑎𝑛𝑠𝑤𝑒𝑟𝑠 "𝐼 ℎ𝑎𝑣𝑒 𝑛𝑜 𝑜𝑝𝑖𝑛𝑖𝑜𝑛" 𝐴𝑠𝑝𝑒𝑐𝑡 𝑥