Cationic PolyDADMAC Flocculant for Paper Mill Water Recycling and Retention Aid
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Product Overview
Bluwat Cationic PolyDADMAC Flocculant is a liquid Poly(dimethyldiallylammonium chloride) polymer, also known as PolyDADMAC, PDADMAC, Polydadmac or PolyDMDAAC. It is a water soluble cationic polymer with high charge density and is widely used in paper making, water treatment, wastewater treatment and sludge dewatering systems.
In paper mills, water recycling is an important part of reducing fresh water consumption and improving production efficiency. However, as white water is reused many times, fines, fillers, dissolved anionic substances, colloidal particles, starch residues and other process chemicals may accumulate in the water loop. This can cause high turbidity, unstable wet end chemistry, poor retention, slow drainage, deposits and higher wastewater treatment load.
PolyDADMAC helps control these problems through strong cationic charge neutralization. It can neutralize negatively charged impurities in pulp slurry and white water, improve the fixation of fines and fillers onto fibers, and help form removable flocs in paper mill water recycling systems.
This product is suitable for paper mills that need better retention performance, cleaner white water, improved drainage, stable water recycling and efficient sludge separation.
Product Identification
Product Name
Cationic PolyDADMAC Flocculant for Paper Mill Water Recycling and Retention Aid
Chemical Name
Poly(dimethyldiallylammonium chloride)
CAS Number
26062-79-3
Common Names & Types
Common Names
- PolyDADMAC / PDADMAC
- Polydadmac / PolyDMDAAC / PDMDAAC
- Cationic Flocculant / Polyelectrolyte
- Paper Mill Retention Aid
- White Water Clarification Polymer
- Paper Mill Water Recycling Chemical
Product Type
- Liquid cationic flocculant
- Organic cationic polymer
- Paper mill water recycling chemical
- Wet end charge control agent
- Retention and drainage support polymer
- White water clarification flocculant
- Sludge dewatering support chemical
Application in Paper Mill Water Recycling
PolyDADMAC can be used in both paper wet end systems and paper mill water recycling systems. It supports better charge control, improves particle fixation and helps reduce suspended solids in circulating water.
It is suitable for:
- Paper mill white water clarification
- Water recycling and reuse treatment
- Wet end charge control
- Fines and filler retention support
- Save-all system improvement
- Process water turbidity reduction
- Anionic trash neutralization
- Paper machine drainage improvement
- Paper mill wastewater pretreatment
- Sludge thickening and dewatering
Why Paper Mill Water Recycling Needs PolyDADMAC
Paper mill circulating water contains fibers, fines, fillers and many dissolved or colloidal substances. When the water loop becomes more closed, these substances can accumulate and disturb the wet end system.
Common problems include:
- High white water turbidity
- Poor fines and filler retention
- More solids loss from the wire section
- Slow drainage and unstable paper machine operation
- Higher load on save-all and wastewater treatment systems
- Anionic trash interfering with retention aids and sizing agents
- More sludge generation and dewatering pressure
PolyDADMAC provides strong positive charge. It helps neutralize negatively charged particles and dissolved anionic materials, making the system easier to control. This supports cleaner recycled water and more stable paper production.
Main Functions
1. White Water Clarification
PolyDADMAC helps destabilize fine suspended particles and colloidal impurities in paper mill white water. After coagulation and flocculation, these particles become easier to separate through save-all systems, sedimentation, flotation or filtration.
2. Water Recycling Support
Cleaner circulating water helps reduce the accumulation of suspended solids and colloidal contaminants. This supports better water reuse and can reduce the pressure on fresh water intake and wastewater discharge systems.
3. Retention Aid Support
In the wet end, PolyDADMAC helps neutralize anionic trash and improve the fixation of fines and fillers onto fibers. This supports better retention performance and reduces valuable fiber and filler loss.
4. Drainage Improvement
Better retention and charge balance can improve water removal on the forming section. This supports more stable drainage and paper machine runnability.
5. Sludge Dewatering Support
PolyDADMAC can also support sludge conditioning in paper mill wastewater treatment, helping improve solid liquid separation and sludge dewatering performance.
Key Benefits
- High cationic charge density for effective charge neutralization
- Suitable for paper mill water recycling and white water clarification
- Helps reduce suspended solids and turbidity in circulating water
- Supports fines and filler retention in paper wet end systems
- Helps neutralize anionic trash from recycled fiber and process chemicals
- Improves coagulation and floc formation in paper mill water treatment
- Liquid form for easy dilution and continuous dosing
- Can be used alone or together with PAC, PAM and other papermaking chemicals
- Supports drainage improvement and paper machine stability
- Helps reduce load on save-all and wastewater treatment systems
- Available in different solid content and viscosity grades
- Manufacturer supply with TDS, MSDS, COA and sample support
Technical Specifications
| Item | Specification |
|---|---|
| Product Series | BLU DA Series PolyDADMAC Liquid |
| Appearance | Colorless to light yellow liquid |
| Chemical Name | Poly(dimethyldiallylammonium chloride) |
| Common Name | PolyDADMAC, PDADMAC, Polydadmac |
| CAS Number | 26062-79-3 |
| Product Type | Liquid cationic polymer |
| Solid Content | 20–50% |
| pH Value | 3.0–7.0 |
| Specific Gravity at 25°C | 1.01–1.10 |
| Molecular Weight | Low, medium, high and very high grades available |
| Brookfield Viscosity at 25°C | Below 200 cps to above 15000 cps depending on grade |
| Solubility | Soluble in water |
| Main Application | Paper mill water recycling, retention aid, white water clarification and sludge dewatering |
Typical Liquid Grades
| Grade | Solid Content | Molecular Weight | Brookfield Viscosity (25°C) |
|---|---|---|---|
| DA 201 | 19.0–21.0% | Low | Below 200 cps |
| DA 202 | 19.0–21.0% | Medium | 200–700 cps |
| DA 203 | 19.0–21.0% | Medium | 700–1000 cps |
| DA 204 | 19.0–21.0% | High | 1000–2000 cps |
| DA 205 | 19.0–21.0% | Very High | 2000–3000 cps |
| DA 401 | 39.0–41.0% | Low | Below 500 cps |
| DA 402 | 39.0–41.0% | Medium | 500–1000 cps |
| DA 403 | 39.0–41.0% | Medium | 1000–3000 cps |
| DA 404 | 39.0–41.0% | High | 3000–5000 cps |
| DA 405 | 39.0–41.0% | High | 5000–8000 cps |
| DA 406 | 39.0–41.0% | Very High | 8000–12000 cps |
| DA 407 | 39.0–41.0% | Very High | 12000–15000 cps |
| DA 408 | 39.0–41.0% | Very High | Above 15000 cps |
| DA 451 | 44.0–46.0% | High | 8000–12000 cps |
| DA 501 | 49.0–51.0% | Low Medium | 1000–2000 cps |
| DA 502 | 49.0–51.0% | Medium | 2000–3000 cps |
| DA 503 | 49.0–51.0% | High | 3000–5000 cps |
| DA 504 | 49.0–51.0% | High | 5000–8000 cps |
| DA 505 | 49.0–51.0% | Very High | 8000–12000 cps |
| DA 506 | 49.0–51.0% | Very High | 12000–15000 cps |
| DA 507 | 49.0–51.0% | Very High | Above 15000 cps |
Recommended Use in Paper Mill Water Recycling
The best dosage and dosing point should be confirmed by laboratory testing and mill trial because water recycling systems vary by paper grade, furnish type, recycled fiber ratio, filler content, pH, conductivity and white water contamination level.
A common testing process may include:
- Collect representative white water or process water sample
- Check turbidity, suspended solids, pH and conductivity
- Dilute PolyDADMAC before dosing
- Add PolyDADMAC and mix evenly for charge neutralization
- Add PAC or PAM if stronger flocculation is required
- Allow sedimentation, flotation or filtration
- Compare treated water clarity, floc size and sludge condition
- Adjust dosage according to water reuse target and cost
Recommended Use as Retention Aid Support
For paper wet end retention, PolyDADMAC should be tested according to the actual paper machine system. It can help improve charge balance before the main retention aid program.
A typical wet end evaluation may include:
- Test pulp slurry charge condition and white water turbidity
- Select a suitable PolyDADMAC grade
- Dose PolyDADMAC at a controlled point with good mixing
- Evaluate fines retention, filler retention and drainage
- Combine with PAM or microparticle retention system if needed
- Monitor paper machine runnability and product quality
- Avoid overdosing to prevent charge reversal or chemical imbalance
Suggested Dosing Points
PolyDADMAC can be tested in different paper mill positions, such as:
- Machine chest / Blend chest
- Fan pump inlet / Short circulation system
- Before main retention aid dosing
- White water loop / Save-all inlet / DAF inlet
- Sludge conditioning tank
The suitable dosing point should be selected according to mixing condition, reaction time, water quality and treatment objective.
Use with PAC and PAM
PolyDADMAC can be used alone or in combination with inorganic coagulants and flocculants.
- PolyDADMAC helps neutralize charge and destabilize fine particles.
- PAC supports coagulation and suspended solids removal in water treatment.
- PAM helps form larger flocs for faster separation and sludge dewatering.
In paper mill water recycling, the combined use of PolyDADMAC, PAC and PAM can help improve clarification, reduce white water turbidity and support better solid liquid separation.
Dilution and Dosage
When PolyDADMAC is used alone for water treatment, it is recommended to dilute it to 0.5–5% concentration based on solid content before dosing.
For paper mill retention and water recycling applications, the dosage should be determined by jar test, charge demand test, retention test, drainage test and machine trial.
Overdosing should be avoided because excessive cationic charge may disturb wet end balance, affect other additives or cause deposit problems. The most economical dosage should be selected according to treatment performance and operating cost.
Suitable Paper Mill Applications
- Packaging paper mills
- Corrugated medium production
- Kraft liner board mills
- Writing and printing paper mills
- Tissue paper production
- Recycled paper mills
- Board paper mills
- Specialty paper mills
- White water recycling systems
- Wastewater treatment plants
Packaging & Storage
Packaging
Available in 25L plastic drum, 200L plastic drum, and 1000L IBC drum. Customized packaging can be discussed according to order quantity and shipment requirements.
Storage
Store in original containers in a cool and dry place. Keep away from heat, flame and direct sunlight. Keep containers tightly closed when not in use. Please refer to the product label, Technical Data Sheet and MSDS for detailed handling, storage and shelf life information.
Why Choose Bluwat
Bluwat supplies PolyDADMAC, PDADMAC, PAM, PAC, Polyamine and other water treatment and papermaking chemicals for paper mills and industrial wastewater treatment plants.
For paper mill water recycling and retention aid applications, Bluwat can provide product grade selection, sample testing support, jar test guidance and chemical combination recommendations. Technical documents including TDS, MSDS and COA can be provided for customer evaluation.
Request a Sample
If your paper mill has high white water turbidity, poor retention, unstable wet end chemistry, slow drainage or water recycling problems, contact Bluwat for Cationic PolyDADMAC Flocculant sample and technical support. Our team can help recommend a suitable grade and testing program based on your process water and paper machine condition.