A kind of high thixotropy paper coating containing carboxymethyl cellulose and preparation method thereof
A carboxymethyl cellulose and thixotropic technology, applied in paper coating, fiber raw material treatment, pigment-containing coating, etc., to achieve the effects of high production efficiency, simple production process and low cost
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Embodiment 1
[0031] 0% (relative to pigment) of CMC was dissolved in distilled water until use. First disperse the pigment with a high-speed disperser, the addition of kaolin is 40%, the addition of ground calcium carbonate (GCC) is 60%, and a certain amount of dispersant is added, and the stirring is continued at 3000r / min for 20 minutes; then the rotating speed is fixed at 2000r / min, add styrene-butadiene latex as the main adhesive, keep stirring for about 5 minutes, and add defoamer for defoaming; finally add CMC solution and keep stirring for about 2 minutes. Each component needs to be added separately to ensure that the components of the coating can be evenly dispersed. After the coating is prepared, adjust the pH value to about 8.5 with sodium hydroxide standard solution, and control the target solid content of the coated paper surface coating at 66%. The specific technological process of the process is as follows figure 1 As shown, this example is used as a comparative example.
Embodiment 2
[0033]0.4% (relative to the pigment) of CMC was dissolved in distilled water for use. First disperse the pigment with a high-speed disperser, the addition of kaolin is 40%, the addition of ground calcium carbonate (GCC) is 60%, and a certain amount of dispersant is added, and the stirring is continued at 3000r / min for 20 minutes; then the rotating speed is fixed at 2000r / min, add styrene-butadiene latex as the main adhesive, keep stirring for about 5 minutes, and add defoamer for defoaming; finally add CMC solution and keep stirring for about 2 minutes. Each component needs to be added separately to ensure that the components of the coating can be evenly dispersed. After the coating is prepared, adjust the pH value to about 8.5 with sodium hydroxide standard solution, and control the target solid content of the coated paper surface coating at 66%. The specific technological process of the process is as follows figure 1 shown.
Embodiment 3
[0035] 0.7% (relative to the pigment) of CMC was dissolved in distilled water for use. First disperse the pigment with a high-speed disperser, the addition of kaolin is 40%, the addition of ground calcium carbonate (GCC) is 60%, and a certain amount of dispersant is added, and the stirring is continued at 3000r / min for 20 minutes; then the rotating speed is fixed at 2000r / min, add styrene-butadiene latex as the main adhesive, keep stirring for about 5 minutes, and add defoamer for defoaming; finally add CMC solution and keep stirring for about 2 minutes. Each component needs to be added separately to ensure that the components of the coating can be evenly dispersed. After the coating is prepared, adjust the pH value to about 8.5 with sodium hydroxide standard solution, and control the target solid content of the coated paper surface coating at 66%. The specific technological process of the process is as follows figure 1 shown.
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Abstract
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