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CMC (sodium carboxymethyl cellulose) extension and dissolution method


CMC (sodium carboxymethyl cellulose) extension and dissolution method

Carboxymethyl cellulose (CMC) of high-end products for the replacement of polyanionic cellulose ((PAC) is a kind of anionic cellulose ether, has a higher degree of substitution and replace the uniformity of the molecular chain is shorter, more stable molecular structure, so it has better resistance to salt, acid, calcium, high temperature resistance also, the solubility enhancement. Applied to carboxymethyl cellulose (CMC) can be applied in all industries, can provide better stability and meet the higher requirements of the process.

The CMC is mixed directly with water, and then prepared into a paste solution. In the configuration of CMC paste adhesive, adding a certain amount of clean water in the cylinder with ingredients mixing device, mixing device in the open case, CMC will slowly spread to the ingredients in the cylinder, stirring constantly, make water and CMC fusion, CMC can fully dissolve completely. In the CMC melt, the uniform scattering, and stirring, the purpose is "to prevent CMC and water meet, agglomeration, agglomeration, reduce the dissolved amount of CMC problem, and improve the dissolution rate of CMC. The mixing time and the time for the CMC to dissolve completely are not the same. It is the two concept. In general, the time of mixing is much shorter than the time required for the CMC to be completely dissolved, and the time required for the two party depends on the specific circumstances.

Determine the mixing time is based on: when the CMC in the water evenly dispersed, there is no obvious large clumps of objects exist, you can stop mixing, so that CMC and water in the static state of mutual penetration, mutual integration.

There are several ways to determine the time required for CMC to dissolve completely:

(1) CMC and water are fully bonded, and there is no solid liquid separation between the two;

(2) the mixed paste is uniform and the surface is smooth;

(3) the color of mixed paste is close to colorless and transparent. From the CMC is put into the mixing tank and the water began to mix, to CMC completely dissolved, the time required between 10 ~ 20 hours.

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