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聚丙烯纤维是世界五大合成纤维之一，具有相对密度低、化学稳定性好、强力高、耐磨等优点，同时由于原料来源丰富、制造简单、价格低廉，因而发展相当迅速，在工业和日常生活中得到了广泛的应用。细旦聚丙烯纤维具有独特的输水导湿作用，制成的内衣穿着滑爽、舒适。但是，由于聚丙烯是一种饱和的碳氢高聚物，疏水性很强，是一种非极性结构，其分子中没有可与任何染料分子相结合的极性基团和反应性基团，而且聚丙烯纤维的结晶度很高，结构紧密，内部缺乏染料扩散必需的孔隙，因此目前一般常用的染料，甚至分散染料也几乎不能使聚丙烯纤维染色。作为服用纺织材料，聚丙烯纤维的染色问题是聚丙烯纤维进一步发展中急需解决的问题。
Polypropylene fiber is one of the five most important synthetic fibers in the world. It has many advantages, such as low relative density, good chemical stability, high strength and wear resistance. At the same time, because of its abundant raw materials, simple manufacture and low price, it has developed rapidly and has been widely used in industry and daily life. Fine denier polypropylene fiber has a unique water and moisture conduction function, and the underwear made of it is smooth and comfortable to wear. However, polypropylene is a saturated hydrocarbon polymer with strong hydrophobicity and non-polar structure. There are no polar and reactive groups in its molecule that can be combined with any dye molecule. Moreover, polypropylene fibers have high crystallinity, compact structure and lack of necessary pore for dye diffusion. Therefore, dyes, even disperse dyes, are commonly used at present. Polypropylene fibers can hardly be dyed. As clothing textile materials, the dyeing of polypropylene fibers is an urgent problem to be solved in the further development of polypropylene fibers.