Polypropylene filament varieties are filament, short fiber, bristle, membrane split fiber, hollow fiber, shaped fiber, all kinds of composite fibers and non-woven fabrics. The main purpose is to produce carpets, decorative fabrics, furniture fabrics, all kinds of ropes, strips, fishing nets, linoleum, building reinforcements, packaging materials and industrial fabrics, such as filter cloth, sackcloth and so on. In addition, the application of clothing is also increasingly widespread, with a variety of fiber blends made of different types of blended fabrics, after knitting can be made into shirts, outerwear, sportswear, socks and so on. Made of polypropylene fiber hollow fiber, light, warm, good elasticity.

    Polypropylene filaments in the molecular structure does not contain chemical groups can be combined with the dye, so dyeing more difficult. Usually melt-color method, the pigment preparation and polypropylene polymer in the screw extruder evenly mixed, after melt spinning to get color fastness to color fiber. Another method is acrylic acid, acrylonitrile, vinyl pyridine copolymerization or graft copolymerization, the polymer macromolecules can be combined with the dye polar groups, and then directly using conventional dyeing. In the polypropylene fiber production process often need to add a variety of additives to improve dyeing, light and fire resistance.