Polyethylene terephthalate (PET) fibers having reactive cyanuric groups were synthesized by reaction of cyanuric chloride with PET fibers aminolyzed by ethylenediamine. In subsequent reaction with D-glucose, the hygroscopicity of PET fibers was further enhanced. The mechanical strength of PET fibers was not influenced by the reactions other than aminolysis, but their dyeing abilities were greatly affected by each of the reactions. When various sugars other than D-glucose were examined, it was found that reaction with D-maltose imparted the highest hygroscopicity to PET fibers. Interestingly, nonreducing sugars of low reactivity such as D-trehalose could also be made to react with PET fibers using the same methods.
Statistics reported on web in 2005 by the Council for PET Bottle Recycling (Japan, http://www.petbottle-reg.gr.jp).
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