Colloidal Silica Microparticle Retention System
Colloidal silica microparticle systems are used in the paper machine wet end as part of a two-component or three-component retention and drainage system. When used in combination with a cationic polymer (cationic starch or CPAM), colloidal silica creates microflocs with high surface area that dramatically improve retention efficiency, drainage speed, and paper formation uniformity on high-speed paper machines.
Technical Specifications
| pH | 9.5–11.0 |
| appearance | Milky white to translucent colloidal dispersion |
| density (g/mL) | 1.09–1.12 |
| SiO₂ content (%) | 15±1 |
| particle size (nm) | 3–10 |
Applications
- High-speed paper machine retention and drainage system
- Three-component system: cationic starch / CPAM / colloidal silica
- Fine paper and board wet-end retention improvement
- Formation improvement in premium printing papers
- Microparticle system in alkaline fine paper production
Key Features
- Nanoscale particle size provides enormous surface area for flocculation
- Outstanding drainage improvement at moderate cationic polymer dosage
- Improves paper formation quality and two-sidedness
- Compatible with cationic starch and CPAM in all-neutral systems
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