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Sea-island type polyethylene terephthalate ultramicrofibers with a single fiber diameter of ca. 600 and 800 nm have been produced over the last 4 years. Alkaline dissolution behavior and dyeing properties of the ultramicrofiber fabrics were investigated. It was found that the dissolution ratio was dependent upon temperature in the alkali treatment. When the fabric was treated with 1 wt% sodium hydroxide...
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