{"id":4415,"date":"2026-07-31T15:48:45","date_gmt":"2026-07-31T15:48:45","guid":{"rendered":"https:\/\/fsxchemical.com\/?p=4415"},"modified":"2026-10-25T12:52:25","modified_gmt":"2026-10-25T12:52:25","slug":"cmc%e5%9c%a8%e7%ba%ba%e7%bb%87%e5%93%81%e4%b8%8a%e6%b5%86%e5%92%8c%e5%8d%b0%e8%8a%b1%e4%b8%ad%e7%9a%84%e5%ba%94%e7%94%a8-%e5%ae%9e%e7%94%a8%e5%ba%94%e7%94%a8%e6%8c%87%e5%8d%97","status":"publish","type":"post","link":"https:\/\/fsxchemical.com\/kk\/blog\/cmc%e5%9c%a8%e7%ba%ba%e7%bb%87%e5%93%81%e4%b8%8a%e6%b5%86%e5%92%8c%e5%8d%b0%e8%8a%b1%e4%b8%ad%e7%9a%84%e5%ba%94%e7%94%a8-%e5%ae%9e%e7%94%a8%e5%ba%94%e7%94%a8%e6%8c%87%e5%8d%97\/","title":{"rendered":"CMC for Textile Sizing and Printing: DS, Viscosity and Grade Selection"},"content":{"rendered":"

Carboxymethyl cellulose (CMC) can be used in textile sizing and selected printing systems, but the correct grade depends on degree of substitution (DS), viscosity method, purity, salt tolerance and process chemistry<\/strong>. Reactive printing requires particular care: sodium alginate remains a common benchmark, while a purified or high-DS CMC grade or blend should be approved only after compatibility, color-yield and wash-off trials.<\/p>\n\n\n\n

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Where CMC Fits in Textile Processing<\/h2>\n\n\n
\u049a\u043e\u043b\u0434\u0430\u043d\u0443<\/th>CMC role<\/th>Qualification priority<\/th><\/tr><\/thead>
Warp sizing<\/td>Film formation, adhesion and viscosity control<\/td>Yarn strength, abrasion, add-on and desizing<\/td><\/tr>
Pigment printing<\/td>Rheology component in compatible binder systems<\/td>Binder compatibility, outline, handle and curing<\/td><\/tr>
Selected reactive printing systems<\/td>Possible high-DS or purified CMC\/blend after trials<\/td>Dye\/alkali\/salt compatibility, color yield and wash-off<\/td><\/tr>
Disperse or other printing systems<\/td>Grade and route dependent<\/td>Rheology, filtration, fixation and residue<\/td><\/tr>
Digital pretreatment<\/td>Separate application\u2014not inferred from screen-printing grade<\/td>Fabric-bath filtration, applied add-on, coating uniformity and ink interaction on fabric; no printhead-ink approval inferred<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

CMC in Textile Sizing<\/h2>\n\n\n\n

How CMC Works as a Sizing Agent<\/a><\/h3>\n\n\n\n

In warp sizing, yarn is coated with a sizing agent before weaving to reduce breakage caused by friction and mechanical stress on the loom. CMC forms a flexible, water-soluble film around the yarn surface that provides temporary protection during weaving without permanently altering the fiber.<\/p>\n\n\n\n

Compare the CMC sizing film with the existing size formulation on the intended yarn. Record adhesion, flexibility, abrasion resistance, shedding and removal after weaving; do not infer superior film uniformity or easier desizing from the polymer name alone.<\/p>\n\n\n\n

Recommended Viscosity Grades for Sizing<\/h3>\n\n\n\n

Viscosity is one selection parameter, alongside film adhesion and flexibility, yarn abrasion resistance, applied add-on, bath stability and desizing. Select a workable viscosity at the actual sizing-bath temperature, concentration and application speed. Confirm protection and shedding in the subsequent loom trial; loom speed is not the speed at which the sizing bath is applied.<\/p>\n\n\n\n

Sizing concentration is process-specific. Establish the working solids from yarn count and blend, add-on target, loom conditions, desizing requirement and compatibility with starch or synthetic sizing agents; confirm performance in a controlled loom trial instead of applying a universal dosage.<\/p>\n\n\n\n

Desizing and Washout Considerations<\/h3>\n\n\n\n

CMC water solubility can support desizing, but it does not establish a universal warm-water-only removal process. Test the complete size recipe, including starch, synthetic polymers, lubricants and any changes during drying or storage, under the intended wash temperature, water quality, time and mechanical action. Other recipe components may require their own removal treatment.<\/p>\n\n\n\n

Before reactive or vat dyeing, verify residual size and fabric absorbency after the proposed desizing sequence, then check dyeing uniformity. A supplier solubility statement alone does not prove complete removal from the woven fabric.<\/p>\n\n\n\n

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CMC in Textile Printing Paste<\/a><\/h2>\n\n\n\n

Function as a Thickener in Paste Formulations<\/a><\/h3>\n\n\n\n

In printing paste, CMC can modify viscosity, screen flow and transfer to the fabric. A shear-thinning paste may show lower apparent viscosity at higher shear rate; this is different from time-dependent structural recovery after the squeegee passes. Measure flow and recovery with a defined shear history and reading schedule when required, then verify transfer and print definition. Do not assume rapid recovery from the CMC name or one viscosity reading.<\/p>\n\n\n\n

Selected CMC grades can be evaluated in compatible pigment formulations or as components of tested reactive-printing blends. In reactive printing on cellulosic fabric, compare the candidate with the established alginate reference for dye interaction, rheology, retained color and wash-off rather than inferring suitability from DS or viscosity alone.<\/p>\n\n\n\n

Recommended DS Range for Printing Applications<\/h3>\n\n\n\n

Do not specify one universal DS range for textile printing. DS affects solubility, electrolyte tolerance and interaction with dyes and auxiliaries; the appropriate value depends on the printing route and the supplier\u2019s grade design. Request the current grade-specific FSX TDS and the declared DS test method and acceptance range. Use a common controlled screening recipe, then validate the candidate in the intended application with appropriate preparation.<\/p>\n\n\n\n

Higher DS can improve solubility and salt tolerance, but DS alone does not guarantee print performance. Purity, substitution uniformity, molecular-weight distribution and the full dye\/alkali\/electrolyte system also influence rheology, color yield and wash-off.<\/p>\n\n\n\n

Compatibility with Pigment and Reactive Dye Systems<\/h3>\n\n\n\n

Before using CMC in a new paste formulation, run a compatibility check with your binder, fixative, and any other auxiliaries in the recipe. Some combinations can cause viscosity instability or phase separation during storage.<\/p>\n\n\n\n

Define paste holding time from the customer\u2019s actual temperature and recipe. Measure viscosity, homogeneity and print result at preparation and at the intended production intervals; do not assume a universal 24- or 48-hour stability claim.<\/p>\n\n\n\n

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CMC in Textile Dyeing Auxiliaries<\/a><\/h2>\n\n\n\n

Role as a Dispersant and Stabilizer<\/h3>\n\n\n\n

In dyeing processes, CMC can function as a dispersant that helps keep dye particles evenly distributed in the dye bath. This is particularly relevant in systems where dye aggregation or uneven dispersion can cause shade variation across the fabric.<\/a><\/p>\n\n\n\n

CMC is not a primary dyeing auxiliary in every process. Any use in a dye bath should be treated as a customer-specific formulation question and evaluated for dye chemistry, electrolyte level, liquor flow, filtration and wash-off.<\/p>\n\n\n\n

Application Method and Concentration Range<\/h3>\n\n\n\n

Avoid a generic dye-bath dosage. Begin with the dye or machine supplier\u2019s validated process, then screen the CMC grade at laboratory scale and confirm that it does not impair leveling, filtration, shade or fastness.<\/p>\n\n\n\n

If you are considering CMC as a dyeing auxiliary, request application guidelines from your supplier and run small-scale trials before adjusting your dye bath chemistry. The interaction between CMC and your specific dye system should be confirmed experimentally.<\/p>\n\n\n\n

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Selecting the Right CMC Grade for Your Process<\/a><\/h2>\n\n\n\n

Low vs. Medium vs. High Viscosity<\/h3>\n\n\n\n

CMC viscosity is measured in a solution at a specified concentration and temperature. Report the concentration basis, water, preparation, instrument, spindle, speed and reading time; do not impose one test condition across all commercial grades. The following labels are screening descriptions, not application approvals:<\/p>\n\n\n\n