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Polypropylene FDY Yarn, polypropylene FDY Yarn manufacturer, polypropylene Yarn manufacturer, polypropylene filament manufacturer, polypropylene fdy Yarn price
[Why can't polypropylene FDY yarn be dyed by conventional methods?]
Release date:[2020/2/11] A total of reading[4]Times

Why can't polypropylene FDY yarn所有在线棋牌下载 be dyed by conventional methods?


所有在线棋牌下载as we all know, polypropylene is difficult to dye, and polypropylene fdy yarn is no exception. so what causes it?


The raw material of polypropylene FDY yarn 所有在线棋牌下载does not contain chemical groups that can bind with dyes in the macromolecular structure, so it is difficult to dye.


Polypropylene FDY yarns are usually melt-colored. The pigment preparation and polypropylene polymer are evenly mixed in a screw extruder, and the color fastness of colored fibers is obtained after melt spinning. Another method is to copolymerize or graft copolymerize with acrylic acid, acrylonitrile, vinylpyridine, etc., so that the polymer macromolecules can introduce polar groups that can be combined with dyes, and then dye directly by conventional methods.


In the production of polypropylene FDY yarns所有在线棋牌下载, various additives are often added to improve dyeability, light resistance and flame resistance.


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