Color master batch, preparation method and application thereof, and PE-RT pipe
A PE-RT, color masterbatch technology, applied in the field of plastic products, can solve the problem of constant pipe quality
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[0051] The present invention also provides a method for preparing a color masterbatch, wherein the color masterbatch is the above-mentioned color masterbatch; the preparation method comprises:
[0052] The various raw materials are mixed, and then the obtained mixture is extruded and granulated.
[0053] Further, the preparation method includes:
[0054] First heat up the raw materials including high-density polyethylene, linear low-density polyethylene and opacifier to 80-100°C while stirring and mixing, continue stirring and mixing at 80-100°C for 5-8 minutes, and then cool down to below 50°C obtain the first mixture;
[0055] Stir and mix the first mixture and the inorganic pigment while raising the temperature to 50-80°C, and continue stirring and mixing at 80-100°C for 5-8 minutes to obtain a mixture;
[0056] The mixture obtained above is placed in a twin-screw extrusion granulator for extrusion granulation.
[0057] Preferably, the twin-screw extrusion granulator is ...
Embodiment 1
[0068] (1) Weigh 45 parts of high-density polyethylene, 40 parts of linear low-density polyethylene (melt index: 20g / 10min), 10 parts of nano-titanium dioxide (rutile type, particle size 0.15-0.25μm), and 1 part of titanium yellow , 0.5 parts of ultramarine blue, 0.05 parts of iron oxide and 0.03 parts of carbon black.
[0069] (2) Mix titanium yellow, ultramarine blue, iron oxide and carbon black evenly to obtain a mixed pigment.
[0070] (3) Put high-density polyethylene, linear low-density polyethylene and nano-titanium dioxide into the kneader and heat up to 80°C while stirring and mixing, continue stirring and mixing at 80°C for 8 minutes, then cool down to below 50°C, add the above Mix the pigments, raise the temperature to 70°C and stir and mix for 8 minutes to obtain the mixture.
[0071] (4) Place the mixture obtained above in a parallel co-rotating twin-screw extrusion granulator for extrusion and granulation; wherein, the feeding temperature is controlled at 130°C,...
Embodiment 2
[0074] The difference between this embodiment and Example 1 is that step (1) is replaced by: taking 50 parts of high-density polyethylene, 35 parts of linear low-density polyethylene (melt index is 18g / 10min), nano titanium dioxide (rutile type, Particle size is 0.15-0.25μm) 12 parts, titanium yellow 1 part, ultramarine blue 0.5 part, iron oxide 0.05 part and carbon black 0.03 part.
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