What Is PolyDADMAC?
폴리다드맥 (poly(diallyldimethylammonium chloride)) is a highly cationic water-soluble polymer 널리 사용됨 제지 및 펄프 산업. It is a linear quaternary ammonium polymer that exhibits strong electrostatic attraction to negatively charged particles, such as:
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셀룰로오스 섬유
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Fillers (e.g., kaolin, PCC)
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Colloidal anionic trash (e.g., hemicelluloses, lignin fragments)
Its unique chemistry makes PolyDADMAC an essential wet-end additive for improving retention, drainage, and overall system cleanliness.
Key chemical characteristics:
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Appearance: Clear to pale yellow liquid
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Charge density: High cationic charge
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용해도: 물에 완전히 용해됨
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Molecular weight: Low to medium, depending on application
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pH stability: Effective under a wide pH range (4–10)
Main Functions of PolyDADMAC in Papermaking
PolyDADMAC plays a multifunctional role in wet-end chemistry:
1. Retention Aid and Fixative
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Binds fine fibers and fillers to the paper web
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Reduces solids loss in white water, improving raw material utilization
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Enhances sheet formation and uniformity
2. Charge Neutralization
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Eliminates the negative charge of fibers and colloids
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Improves compatibility with other cationic additives, such as CPAM (Cationic Polyacrylamide)
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Stabilizes the wet-end system, reducing foaming and deposits
3. Pitch and Anionic Trash Control
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Fixes dissolved and colloidal anionic materials to fiber surfaces
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Reduces pitch-related spots, stickies, and deposit formation
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Improves machine cleanliness and runnability
4. Deinking and Wastewater Applications
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Acts as a primary flocculant in deinking processes
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Enhances ink particle agglomeration and removal efficiency
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Improves clarity in white water and effluent treatment
How to Use PolyDADMAC in Wet-End Systems
일반적인 복용량:
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0.01%–0.05% of oven-dry pulp (100–500 g/ton) depending on process conditions
Addition Points:
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Mixing Chest / Machine Chest: For charge neutralization and pitch control
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Fan Pump or Headbox Approach: For retention and fine particle fixation
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Deinking Loop or White Water System: For flocculation and water clarity
운영 팁:
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PolyDADMAC works best under moderate shear conditions to promote uniform adsorption
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Overdosing may cause cationic reversal, reducing efficiency or interfering with sizing
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Can be combined with microparticle systems (e.g., bentonite) for higher retention performance
다른 제지 화학 물질과의 시너지 효과
PolyDADMAC is often part of a multi-component wet-end program. Its performance is amplified when used in combination with:
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Cationic Polyacrylamide (CPAM):
Forms a dual retention system; CPAM flocculates fines, while PolyDADMAC fixes colloids and enhances initial floc formation. -
AKD or ASA Sizing Agents:
Improves size retention on fiber surfaces and reduces size loss into the white water. -
Deinking and Flotation Chemicals:
Enhances particle agglomeration for better ink removal and flotation performance.
This synergy leads to better retention, drainage, and chemical efficiency, ultimately lowering chemical consumption and improving paper machine runnability.
Advantages and Environmental Features
운영상의 이점:
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낮은 복용량에서도 높은 효율
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Enhances system cleanliness and reduces downtime
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Improves sheet formation, strength, and surface quality
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Reduces solids and chemical load in white water loops
Environmental and Regulatory Benefits:
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Fully water-soluble and easy to handle
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Reduces suspended solids in wastewater, improving effluent clarity
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Compliant with most paper for food contact standards (check specific grade)
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Compatible with closed-loop and high-recycling mill operations
Choose High-Performance PolyDADMAC from Amazon Chemicals
At Amazon Chemicals, we provide tailor-made PolyDADMAC solutions for paper mills, designed to optimize wet-end chemistry and improve overall efficiency.
Our PolyDADMAC products deliver:
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Superior retention and drainage performance
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Effective pitch and stickies control
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Improved system stability and reduced downtime
👉 Optimize your papermaking process today!
기술팀에 문의하세요 or learn more about our wet-end additives.
