When it comes to polypropylene high-strength yarn, the problem of dyeing is difficult, but this old problem is now solved.
Polypropylene high-strength yarn is a single type in the finished polypropylene product. It is a single-use product with a wide range of uses. However, due to its difficult dyeing, the application field of polypropylene high-strength yarn is limited to a certain degree, especially in terms of clothing. Big. Since this old problem is currently not solved, is there an improved method? Xiaobian to give you an analysis:
Polypropylene does not contain a chemical group capable of binding to a dye on a macromolecular structure, so dyeing is difficult. The polypropylene fiber of the scientific name is melted and flammable in the near flame. It burns slowly and emits black smoke from the fire. The upper end of the flame is yellow, the lower end is blue, and the oil smell is emitted. After burning, the ash is hard round, light yellow and brown particles, and the handcuffs are brittle. . The pigment preparation and the polypropylene polymer are uniformly mixed in a screw extruder by a melt coloring method, and melt-spun to obtain a colored fiber having high color fastness. Another single method is copolymerization or graft copolymerization with acrylic acid, acrylonitrile, vinyl pyridine, etc., to introduce a good group capable of binding with the dye on the macromolecule of the polymer, and then directly dyeing by a conventional method. Various additives are often required in the production of polypropylene to improve dyeability, light resistance and flame resistance.
At present, there is still no way to cure the shortcomings of polypropylene high-strength yarn at home and abroad, and we can only make great efforts to improve this situation. I believe that with the development of technology, this single problem can be overcome in the near future.
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