The potential commercial importance of unmodified polypropylene (PP) fiber in the carpet and textile industries has led to the need for the development of an aqueous dyeing process for the highly-hydrophobic fiber, consistent with the established coloration processes in use for other high-volume fibers (nylon, polyester and acrylic). Despite substantial research conducted around the globe, a commercially viable and sustainable aqueous dyeing process of PP based on demand activated manufacturing has not been realized.
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