KimaCell® CMC FC 400 sodium carboxymethyl cellulose is an anionic polymer electrolyte. The degree of substitution of commercial CMC ranges from 0.4 to 1.2. Depending on the purity, the appearance is white or off-white powder. The viscosity of CMC aqueous solution remains normal in a wide pH range, and is most stable between pH 7 and 9. As the pH value decreases, CMC changes from salt form to acid form, and is insoluble in water and precipitates. When the pH value is less than 4, most of the salt form turns into acid form and precipitates. When the pH is below 3, the degree of substitution is less than 0.5, and it can completely transform from the salt form to the acid form. The pH value of complete transformation of CMC with high degree of substitution (above 0.9) is below 1. Therefore, try to use CMC with a high degree of substitution for the seepage glaze.
|Chemical name||Sodium Carboxymethyl Cellulose|
|Synonym||Cellulose gum, Carboxymethyl Cellulose, derivative of cellulose, Carboxymethylcellulose sodium salt, Na CMC, Sodium cellulose glycolate, Sodium CMC|
|Product Grade||CMC FC400|
|Solubility||Water Soluble Cellulose ether|
|Physical form||White to off-white cellulose powder|
|Appearance||White to creamy, free flow odorless powder|
|Viscosity ( 2%, Brookfield, 25℃)||200-500 cps|
|Degree of Substitution||0.75-0.90|
|Purity (dry basis)||Min98%|
|Loss on drying (moisture)||Max. 8.0%|
|Particle size||Min.99.0% pass through 100 mesh|
KimaCell® CMC FC 400 sodium carboxymethyl cellulose is widely used in the ceramic industry, mainly used in glazes such as ceramic body, ceramic tile bottom glaze and surface glaze, printing glaze and seepage glaze. Ceramic grade carboxymethyl cellulose CMC is mainly used as an excipient, plasticizer and reinforcing agent in the ceramic body, which can increase the green body speed, prevent the cracking of the finished product, and facilitate the molding of the green body; ceramic grade carboxymethyl cellulose CMC is used in the glaze The role of slurry is binder, suspending agent and decoagulant. Adding an appropriate amount of ceramic grade carboxymethyl cellulose CMC can improve the grinding efficiency, improve the fluidity of the glaze slurry, increase the strength of the raw glaze, reduce the drying shrinkage of the glaze, and make it firmly bonded with the green body without peeling off; ceramic grade carboxymethyl cellulose The viscosity of methylcellulose CMC aqueous solution decreased sharply with the increase of temperature. The viscosity of glaze slurry added with antelope methyl cellulose CMC also changes with temperature, so care should be taken to keep the temperature of glaze slurry from fluctuating too much during production. In addition, the glaze slurry containing ceramic grade methylcellulose CMC has water retention, which makes the glaze layer dry evenly, the glaze surface is flat and compact, and the glaze surface after firing is smooth and smooth, with good effect...