2. The mixing method of white masterbatch After the color silk color formula is determined, the white masterbatch is evenly dispersed in the polypropylene slices before spinning, which is the key to ensuring the quality of the product. There are two specific mixing methods. One is the weight method and volume method. After the white masterbatch is melted in the extruder or at the rear, it is injected into the polypropylene melt with a small extruder. The uniformity is very good.
3. When selecting white masterbatch, it should be selected according to the selection range. Polypropylene color masterbatch is divided into fine denier and coarse denier. The white masterbatch color of coarse denier cannot be used for fine denier color matching. For the monofilament denier of the fiber, choose the white masterbatch of the same grade.
4. The white masterbatch used is preferably the product of the same manufacturer. In order to reduce costs, high-concentration white masterbatch should be used. The white masterbatch pigments are divided into high, medium and low grades. When matching colors, different grades of white masterbatch should be selected according to the quality requirements of the fiber. In order to avoid the quality variation of the finished fiber due to the different light and thermal stability of the pigment, the color of the white masterbatch with the same light and thermal stability level should be selected when matching the color.