White masterbatch widely used for the production of injection products, blown film bags, as well as the production of cast film and so on. Because the white masterbatch of titanium dioxide content is high, so the plastic products produced by high brightness, in terms of temperature performance is also very good, the physical properties of the raw material itself has no effect.
So in many colors of masterbatch, the white masterbatch has become the production of plastic products, the conventional color, the amount is very large. Thus, White Masterbatch in the development process of the production of white masterbatch technology also requires more and more. In particular, the higher the content of titanium dioxide, may cause the product to be scattered uneven or mixed color and the like. ,
White masterbatch with a bright color, bright and dazzling, high color strength, good dispersion, high concentration, good whiteness, hiding power, resistance to migration and good heat resistance and other characteristics, is widely used in injection molding, EVA, blowing, sheet, household appliances, toys, White Masterbatch packaging materials, wires and cables, plastic bags, automobiles, building materials, Sports and leisure products, packaging bags, bottles and other plastic products industry.
The main technical indicators of white masterbatch:
1, resistance to migration (level) [& ge; 4]
2, moisture content (%) [≤ 0.30] 8, the total color difference [≤ 1.50]
3, melting temperature (oC) [125 ~ 200]
4, white masterbatch dispersibility: [colorless point, stripes]
5, light fastness (grade) [5-8]
6, white masterbatch appearance of granular, uniform particles, consistent color
7, heat resistance (level) [& ge; 4]
Precautions when using white masterbatch
First, in order to reduce the color difference after color, the white masterbatch to be diluted to control the mixing ratio, the filament of not less than 3% to 10%, staple fiber is not less than 1% to 3%, White Masterbatch monochrome expanded continuous filament With three-color equipment spinning, white masterbatch must be mixed in the input after the extrusion machine, while increasing the melt itself, the mixing capacity, can also be added in the extrusion section of the mixing device.
Second, the white masterbatch mixed with the color in the color formula to determine the white masterbatch before spinning evenly dispersed in the polypropylene section, is to ensure product quality key, White Masterbatch the specific method of mixing there are two categories. One is the heavy method and volume method, in the extruder or the back of the white masterbatch melting, with a small extruder into the polypropylene melt, uniformity is very good.
Third, the choice of white masterbatch, according to the choice of choice, polypropylene masterbatch fine denier, coarse denier of the points, coarse denier white masterbatch color can not be used for fine denier color, color should be considered spinning Fiber single filament denier, White Masterbatch select the same level of white masterbatch
Fourth, the choice of white masterbatch is best to produce the same manufacturer's products, in order to reduce the cost should use high-density white masterbatch. White masterbatch pigments are high, medium and low grade, color should be based on the quality requirements of fiber, White Masterbatch the appropriate choice of different levels of white particles. In order to avoid the pigment light and thermal stability caused by different quality of finished fiber variation, color should also choose to meet the fiber quality requirements, with the same light, heat stability level of white masterbatch color, coarse fiber than the concentration of fine fibers Low, the application ratio of white masterbatch is proportional to the square root of fiber denier.
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