Sodium Carboxymethyl Cellulose (CMC) has been widely used in the ceramic industry as an external additive. It plays a role of enhancement, water retention, bonding, suspension and dilution in the ceramic body, glaze slip and fancy glaze, and has an obvious effect on improving the quality of ceramic products, especially the quality of the glaze.
Application of CMC in green body:
Due to its unique molecular structure, CMC forms a firm network structure in the slurry, resulting in strong adhesion. Thus, the plasticity of slurry and the flexural strength of the green body are enhanced, which greatly improves the pass rate of ceramic tile. The dosage of CMC is quite low, and it burns out almost residue-free. These advantages make CMC widely used in ceramic tile and polished tile.
Application of CMC in glaze slip:
The addition of CMC in the glaze slip can prevent or reduce the glaze particle sedimentation, control the rheological properties of the slurry, enhance the adhesion ability of the glaze, make the glaze and green body firmly combined and not easy to fall off, improve the strength of the glaze layer, prevent the forming of stripes and make the glaze smooth and flat.
Application of CMC in fancy glaze:
CMC has good thickening, dispersion and a certain viscosity, and is widely used as the carrier of glaze in printing glaze. In silk-screen printing, the requirements of CMC are also relatively strict. The solution of CMC should be almost transparent with no insoluble matter. The usage of CMC in printing glaze can solve the problem of blocking the screen, reduce color difference and make the design exquisite and vivid.
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