Dyeing of Polypropylene Fibers with Vat Dyes

IntroductionPolypropylene is one of the most intensively developedsynthetic fibers , which accounts for more than80%of thetotal volume and production of all polyolefin fibers . Theirproductionis more than20%of all production of syntheticfibers andlies inthe third place just after the production ofpolyester and polyamide fibers[1]. The application ofpolypropylene fibers depends on the fiber properties . Theyare widely used as nonwoven materials , floor coverings ,geotextiles , carpets , hygieni…

Dyeing of Polypropylene Fibers with Vat Dyes

Polypropylene fibers have been extensively used in a variety of/products, including carpets and upholstery, due to their non-absorbency, good weather resistance, good resistance to macroorgamsms and so on. Because of their hydrophobic and highly crystalline nature, those well-established conventionai dyeing processes are difficult to apply to unmodified polypropylene. Colors of polypropylene fibers are primarily obtained by mass coloration which has the disadvantages of limited number of colors available and difficulties in inventory control due to the rapidly changing color needs of the market. In this paper, the use of vat dyes to dye polypropylene fabrics is investigated. Seventeen vat dyes were screened and factors influencing uptake of dyes by polypropylene fabrics were studied.