PDADMAC for Paper Mill: Cationic Coagulant | Feymer

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PDADMAC for Paper Mill: High-Charge Cationic Coagulant for Enhanced Retention, Drainage, and Strength

PDADMAC for Paper Mill: High-Charge Cationic Coagulant for Enhanced Retention, Drainage, and Strength

In the competitive pulp and paper industry, optimizing process efficiency while meeting stringent environmental standards is paramount. PolyDADMAC (Polydiallyldimethylammonium chloride), commonly known as PDADMAC, has emerged as an indispensable cationic polymer for paper mills worldwide. At Jiangsu Feymer Technology Co., Ltd., we specialize in producing high-quality PDADMAC for paper mill applications, offering superior charge density, low viscosity, and consistent performance. As a listed company on China’s STAR Market and a leader in water-soluble polymers, we bring cutting-edge innovation to the papermaking process. Our PDADMAC for paper mill use functions effectively as a retention aid, drainage promoter, and strength enhancer, particularly in neutral and alkaline papermaking systems. It also plays a crucial role in pulp dewatering, white water treatment, and as a fixative for anionic trash.
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Advantages of the product

Exceptional Charge Neutralization and High Cationicity

Our PDADMAC for paper mill boasts an exceptionally high charge density, typically ranging from 5.5 to 6.5 meq/g, which ensures rapid and effective neutralization of anionic colloidal substances and dissolved organic materials in pulp suspensions. This high cationic charge facilitates superior adsorption onto fiber surfaces and fillers, enhancing the efficiency of retention and drainage systems. In practical terms, paper mills experience improved first-pass retention, reduced furnish costs, and cleaner white water.

Superior Retention, Drainage, and Strength Enhancement

Feymer’s PDADMAC for paper mill is specifically formulated to optimize the microparticle retention system. When used in conjunction with anionic polymers or bentonite, it forms a robust flocculation network that significantly boosts retention of fine fibers, fillers, and sizing agents. This results in higher first-pass retention, better sheet formation, and improved drainage rates on the wire section, leading to increased machine speed and productivity.

Sustainable, Cost-Effective, and Stable Supply

Choosing Feymer’s PDADMAC for paper mill also means embracing sustainability and cost-effectiveness. By improving retention, we help mills reduce raw material consumption, lower chemical usage, and minimize waste generation, aligning with eco-friendly production goals. Furthermore, our PDADMAC acts as an effective sludge dewatering aid, reducing moisture content in sludge and lowering disposal costs. As a listed high-tech company with substantial production capacity, we guarantee supply stability and consistent product quality.

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PolyDADMAC, an acronym for polydiallyldimethylammonium chloride, stands as one of the most widely used cationic polymers in the paper industry. Its role in paper mill operations transcends simple flocculation; it is a multifunctional process chemical that enhances productivity and product quality. At Jiangsu Feymer Technology Co., Ltd., we have dedicated substantial research to perfecting PDADMAC for paper mills, understanding that each mill’s conditions—water hardness, pulp type, machine speed, and desired grades—demand precise polymer characteristics. Our PDADMAC acts primarily as a retention aid, keeping fine fibers and mineral fillers within the sheet rather than lost in the white water. This directly translates to reduced raw material costs, lower effluent loads, and improved profitability. By forming complexes with these anionic substances, PDADMAC prevents them from depositing on wires, press felts, or dryer cylinders, thus reducing downtime and maintenance costs.

Frequently Questions

What is PDADMAC and how does it work in paper mills?

PDADMAC is a highly cationic water-soluble polymer that carries positive charges along its chain. When added to the pulp suspension, these positive charges interact with negatively charged fibers, fillers, and dissolved anionic trash. The primary mechanisms are charge neutralization and bridging flocculation. By neutralizing the anionic contaminants and promoting micro-flocculation, PDADMAC increases the retention of fine particles on the paper web, improves the drainage of water through the wire, and enhances the overall formation and strength of the paper sheet.
The optimal dosage of PDADMAC varies widely depending on system pH, pulp composition, charge demand, and desired effect. In general, dosages range from 0.2 to 1.5 kg per ton of dry pulp for retention purposes, while for pitch control, it may be added at the thick stock or machine chest at levels from 0.5 to 2 kg per ton. Typically, it is added after the fan pump or before the pressure screen to maximize mixing, or directly into the thin stock at the machine. However, the exact point should be determined through trial.

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Customer Testimonials

Henrik Sörensen
Enhanced Retention and Cost Savings at a European Fine Paper Mill

Since switching to Feymer’s PDADMAC for our paper machine, we have observed a 20% increase in first-pass retention, which allowed us to reduce our fiber costs significantly. The product’s high charge density effectively neutralizes the high anionic trash coming from our recycled fiber source. The drainage improvement also enabled us to increase machine speed by 8%. What impressed us most was the technical support; their team conducted a thorough trial and fine-tuned the dosage to our exact needs.

Mei Ling Tan
Superior Strength and Pitch Control in Packaging Grade Production

At our mill in Southeast Asia, we produce high-strength packaging paper from old corrugated containers. We used to suffer severe pitch and stickies issues that caused frequent sheet breaks and downtime. Feymer’s PDADMAC was introduced as a fixative, and almost immediately, the number of breaks reduced by 40%. Furthermore, the retention of fines and filler has improved our sheet strength, allowing us to reduce basis weight without sacrificing performance. The polymer is easy to handle and surprisingly effective at low dosage.

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High Charge Density and Molecular Weight Customization

High Charge Density and Molecular Weight Customization

What sets our PDADMAC for paper mill apart is the ability to tailor the molecular weight and charge density to meet specific process requirements. With a charge density ranging from high to ultra-high (5.5-7.0 meq/g) and a wide molecular weight spectrum, we can engineer the polymer to perform optimally in systems with challenging water chemistries, such as high alkalinity or high conductivity. This customization capability is backed by our advanced production technology at our factories in Jiangsu and Anhui. Our ability to fine-tune these parameters allows paper mills to achieve precise control over flocculation kinetics, resulting in superior retention and drainage without over-flocculation. By adjusting molecular weight, we can also enhance the product’s effectiveness as a strength promoter when needed.
Proven Performance in Water Treatment and Circular Economy

Proven Performance in Water Treatment and Circular Economy

Feymer’s PDADMAC is not only an excellent process chemical for paper machines but also a vital tool for closing the water loop in paper mills. Its exceptional coagulation-flocculation properties make it ideal for treating white water, effluent, and sludge dewatering. By efficiently removing suspended solids and dissolved organic matter, it helps mills meet stringent discharge standards and reduce water consumption. The sludge dewatering property results in a drier cake, lowering disposal costs. Using our PDADMAC contributes to a circular economy by enabling the recovery of valuable fibers and fillers from white water for reuse. Many of our clients have reported a significant reduction in freshwater intake and a decrease in environmental impact, aligning with global sustainability trends and corporate social responsibility goals. Our product is part of our mission to “Make Every Waterprint Count,” providing eco-conscious solutions without compromising on performance.