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1. In order to reduce the chromatic aberration of the fiber after color matching, the white masterbatch should be diluted and the mixing ratio should be controlled. The filament is not less than 3%-10%, the short fiber is not less than 1%-3%, and the monochromatic bulk continuous filament Spinning with three-color equipment, the white masterbatch must be fed into the extruder after mixing. At the same time, it is the precautions for the use of the white masterbatch plus the mixing capacity of the melt itself. It can be used in the extruder section as well as the white masterbatch. Precautions Set up a mixing device.
2. White masterbatch mixing method After the color formula of the color yarn is determined, the white masterbatch is evenly dispersed in the polypropylene fiber slices before spinning. It is the key to ensure the quality of the product when using the white masterbatch. The specific mixing methods of the library are as follows: Two types. One is the heavy method and the volume method. After the white masterbatch is melted in the extruder or at the back, it is injected into the polypropylene melt with a small extruder, and the uniformity is very good.
3. When choosing white masterbatch, it should be selected according to the selection range. Polypropylene masterbatch is divided into fine denier and coarse denier. Coarse denier white masterbatch cannot be used for fine denier color matching. Spinning should be considered when matching colors. For fiber denier per filament, choose white masterbatch of the same grade.
4. The white masterbatch used should be the product of the same manufacturer. In order to reduce the cost, high-concentration white masterbatch should be used. The pigments of white masterbatch are divided into high, medium and low grades. When matching the color, different grades of white masterbatches should be appropriately selected according to the quality requirements of fiber formation. In order to avoid the quality variation of the finished fiber caused by the different light and thermal stability of the pigment, the color of the white masterbatch that meets the fiber quality requirements and has the same light and heat stability level should be selected when matching the color. Low, its white masterbatch application ratio is proportional to the square root of the denier.