Sodium carboxymethyl cellulose is one of the most widely used cellulose, among which the role of binder and lubricant is prominent, and it is widely used in cigarettes and welding electrodes. According to the previous understanding of sodium carboxymethyl cellulose, we will conduct understanding of its application in these two aspects.
CMC can be used as a special binder for filters in cigarettes. The binders for domestic cigarette filters mainly include polyvinyl acetate latex, sodium carboxymethyl cellulose and water glass, among which the aqueous solution of sodium carboxymethyl cellulose is widely used.
In the welding rod industry, when manufacturing flux welding electrodes, it is necessary to mix arc stabilizer, slag forming agent, alloy element powder, water and water glass together to form an electrode, extrude it together with copper core wire, and press-coat it on the surface of the core wire. In order to improve the pressure coating effect, sodium alginate is often added to the flux for lubrication. The disadvantage is that during the baking process, the sodium alginate is heated and foams, making the flux easy to fall off, but the skeleton structure of sodium carboxymethyl cellulose is similar to sodium alginate and can be used as a lubricant. In addition, sodium carboxymethyl cellulose can also be used as a gas generating agent. After a lot of researches and actual production, it has been confirmed that the welding rod using sodium carboxymethyl cellulose has good pressure coating, good lubricity, and the flux does not fall off.
The considerable advantage is that the price of CMC is cheaper than sodium alginate. When sodium carboxymethyl cellulose and alkaline earth metal hydroxide are used together, the pressure-coating property will be greatly changed, and the quality of welding rod will be improved.
To sum up, the water solubility of sodium carboxymethyl cellulose is widely used in the production of cigarette filters and welding electrodes. The previous production materials and technologies have greatly reduced the quality of the products produced, but the addition of sodium carboxymethyl cellulose improves its performance and quality, and can also reduce costs.