Preparation method of calcium carbonate based reinforcing agent for PVC (polyvinyl chloride) advertising film
A calcium carbonate-based, reinforcing agent technology, applied in chemical instruments and methods, fibrous fillers, dyeing low-molecular-weight organic compounds, etc. And the effect of product gloss improvement and tensile strength improvement
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[0029] The present invention will be further described in detail according to the examples below.
[0030] The present invention, the preparation method of calcium carbonate-based strengthening agent for PVC advertisement film, its steps comprise:
[0031] (1) Calcite raw ore is washed, air-dried and pulverized;
[0032] (2) Use a vibrating sieve to perform primary classification and removal of impurities on the pulverized powder, and reclassify powders with different particle size distributions by adjusting the cyclone classification parameters to an average particle size of less than 3.6 microns and a d97 of less than 10 microns;
[0033] (3) In terms of weight percentage, 25% to 50% of the powder that has been classified and removed, 5% to 23% of the metal oxide sol ground by the sol mill, 40% to 65% of water, and 0.5% to 4% of the ground The dispersant is mixed, stirred and ground. The surface of the ground calcium carbonate in the powder is coated with inorganic material...
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