PAM for Textile & Dyeing
Cationic PAM decolorizes dyeing effluent and removes suspended solids. Anionic PAM serves as a sizing agent to improve fabric strength and weaving efficiency.
Dyeing Wastewater Treatment
Textile dyeing generates highly colored wastewater with suspended dyes, pigments, and fibers. Cationic PAM flocculates these contaminants, achieving 90%+ color removal and enabling water reuse or safe discharge. Typical dosage: 5-15 mg/L.
Printing Paste Thickener
PAM serves as a thickener in textile printing pastes, improving paste viscosity and reducing bleeding during printing. It also acts as a binder, improving color fastness and wash durability of printed fabrics.
Textile Sizing Agent
Anionic PAM is used as a sizing agent on warp yarns to improve strength, reduce breakage during weaving, and enhance fabric hand feel. It washes out easily during desizing without leaving residue.
Sludge Dewatering
After primary treatment, textile mill sludge is dewatered using cationic PAM on belt presses or centrifuges. High-charge-density CPAM achieves 75-80% moisture reduction, cutting disposal costs significantly.
Treatment Dosage
| Application | PAM Type | Dosage |
|---|---|---|
| Dyeing wastewater | CPAM 40-60% CD | 5-15 mg/L |
| Printing paste | APAM 8-12M MW | 2-5 kg/t paste |
| Warp sizing | APAM 5-8M MW | 1-3 kg/t yarn |
| Sludge dewatering | CPAM 40-60% CD | 3-8 kg/t DS |
Textile & Dyeing PAM FAQs
Which PAM removes colour from dyeing wastewater?
High-charge-density cationic PAM, generally 40-60% CD, at a representative 5-15 mg/L. Dye molecules and pigment particles in textile effluent carry a net negative charge, so the removal comes mainly from charge neutralisation rather than bridging — which is why charge density matters more here than molecular weight. Colour removal above 90% is achievable on most reactive and disperse dye effluent when the polymer is paired with a coagulant.
Does PAM work on reactive dyes and dissolved colour?
Partly. PAM flocculates suspended and colloidal dye, but hydrolysed reactive dye that is fully dissolved will not settle on polymer alone. Those streams normally need a coagulant such as PAC or alum, or a decolourising agent, ahead of the PAM to convert dissolved colour into a floc the polymer can capture. Judge this from a jar test on the actual effluent rather than from the dye class on the recipe sheet.
What PAM is used for warp sizing and printing paste?
Anionic PAM in both cases, at different molecular weights. Sizing uses 5-8 million Da at a representative 1-3 kg per ton of yarn to raise warp strength and cut loom breakage, and it desizes out without residue. Printing paste uses 8-12 million Da at 2-5 kg per ton of paste as a thickener and binder, which controls viscosity to limit bleeding and helps wash fastness on the printed fabric.
Why does dosage change between batches on the same line?
Textile effluent composition swings with the dye recipe. Salt load from reactive dyeing, residual alkali from scouring, surfactants and levelling agents, and temperature all affect how much charge the polymer loses before it reaches the dye particles. A line running dark shades one shift and pastels the next can need a different dose at the same flow. Mills that dose against a jar test or streaming-current measurement rather than a fixed setpoint use noticeably less polymer.
What information is needed to quote PAM for a textile mill?
Send the application (dyeing effluent, sizing, printing paste, or sludge dewatering), dye classes in use, effluent pH and TSS, colour level or target discharge limit, dewatering equipment type, estimated monthly volume, destination port, and required documents. The confirmed public supply baseline is MOQ 500 kg, free samples, 7-10 day lead time for common grades, T/T and L/C payment, and 25 kg kraft paper bags with plastic liner or 25 kg PE bags.
Textile & Dyeing Processes in Detail
Process-specific selection, dosage, and parameter guidance for each textile & dyeing application.
Dyeing Wastewater Treatment
Decolorization and COD removal from textile dyeing effluent. Handles reactive, disperse, and acid dyes with combined coagulation-flocculation process.
Typical challenge: Intense color from reactive and disperse dyes
Dyeing Wastewater Treatment dosage & parametersTextile Sizing Agent
PAM as warp sizing agent for synthetic and blended fabrics. Provides excellent film-forming properties, adhesion to fibers, and easy desizing.
Typical challenge: Poor adhesion of traditional starch sizes to synthetic fibers
Textile Sizing Agent dosage & parametersPrinting Wastewater
Treatment of textile printing paste wastewater containing high-viscosity thickeners, pigments, and binders. Specialized flocculation breaks emulsions and removes color.
Typical challenge: High viscosity from residual printing paste
Printing Wastewater dosage & parametersNeed PAM for Textile Mills?
Our PAM is widely used in Chinese textile mills. Free samples and technical support available.
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