Sodium carboxymethyl cellulose is easily soluble in water and transparent; it can be stable in alkaline solutions and easily hydrolyzed in acid. It is widely used in many industries, and it is also used in the production of ice packs and cold storage agents. So what are the characteristics of CMC-Na in the production of ice packs and cold storage agents?
The main principle of products used to cool down, such as ice packs, refrigerants and cold storage agents, is to use the reaction between the proportioning ingredients to produce a process of absorbing heat, so as to achieve the effect of cooling.
The main ingredients for making ice packs are roughly: sodium nitrate, sodium borate, CMC-Na, sodium silicate, sodium chloride and sodium hydroxide. The usual preparation method is to mix the above formula according to the application ratio. Weigh carboxymethyl cellulose sodium and add it to sodium borate; Stir and heat until the solution becomes transparent to obtain solution 1; Add sodium nitrate, sodium sulfate decahydrate and sodium silicate in sequence, and stir evenly to obtain solution 2; add sodium hydroxide to the solution and stir evenly; then add sodium chloride and stir evenly; after the solution is transparent, put in the bag, the finished ice bag is made. Chemical ice packs have the advantages of low refrigeration temperature and long refrigeration time.
The so-called refrigerating agent is cold storage agent, which is mainly composed of antifreeze, thickener and water, among which antifreeze includes ethylene glycol, etc.; thickener includes sodium carboxymethyl cellulose and sodium alginate, etc. The steps to prepare the cold storage agent are very simple. First, completely dissolve thickeners such as CMC-Na in water to form a gel solution with good transparency. After the solution is stable, add antifreeze agents such as ethylene glycol while stirring, and stir well to obtain the cooling agent. This type of cold storage agent can be widely used in ice packs, which improves the service life and provides better cooling effect.
In summary, sodium carboxymethyl cellulose uses its own characteristics to play with the substances in the production of ice packs and cold storage agents to form its products. At the same time, it improves the service life and cooling effect of the cold storage agent.