Main uses
Carboxymethyl cellulose is a carboxymethyl group substitution product of cellulose. Depending on its molecular weight or degree of substitution, it can be a completely soluble or insoluble polymer. The latter can be used as a weak acid cation exchanger to separate neutral or alkaline proteins, etc. Carboxymethyl cellulose can form high-viscosity colloids, solutions, adhesion, thickening, flow, emulsification dispersion, molding, water retention, protective colloids, film formation, acid resistance, salt resistance, suspension and other characteristics, and is harmless. It is widely used in the production of food, medicine, daily chemicals, petroleum, papermaking, textiles, construction and other fields.
1. Used in oil and gas drilling, well digging and other projects
① Mud containing CMC can form a thin, hard, low-permeability filter cake on the well wall to reduce water loss.
② After adding CMC to the mud, the initial cutting force of the drilling rig is low, the mud is easy to release the gas wrapped in it, and the debris is quickly abandoned in the mud pit.
③ Drilling mud, like other suspended particles, has a certain service life. Adding CMC can stabilize it and extend its service life.
④ Mud containing CMC is rarely affected by mold, so there is no need to maintain a high pH value or use preservatives.
⑤ Containing CMC as a drilling mud flushing fluid treatment agent can resist pollution from various soluble salts.
⑥ Mud containing CMC has good stability even when the temperature exceeds 150℃, which can reduce water loss.
2. Used in textile and printing and dyeing industries.
The textile industry uses CMC as a sizing agent to size light yarns (such as cotton, silk and wool, chemical fiber and blended yarn).
3. Used in the papermaking industry.
CMC can be used as a paper smoothing agent and sizing agent in the papermaking industry.
4. CMC can be added to synthetic detergents as a dirt adsorbent
Daily chemicals, such as toothpaste industry CMC glycerol aqueous solution is used as the gum base of toothpaste; pharmaceutical industry is used as a thickener and emulsifier, etc.
5. Used in the ceramic industry
It can be used as adhesive, plasticizer, suspending agent, color fixative, etc. for blanks.
6. Used in building materials to improve water retention and strength.
7. Used in the food industry.
The food industry uses high-displacement CMC as a thickener for ice cream, canned food, instant noodles, and a foam stabilizer for beer.
8. Pharmaceutical industry
Choose CMC with appropriate viscosity as a binder, disintegrant, and suspending agent for tablets.