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  Fullbrook Systems Ltd
  • Home
  • Products
    • DISPERMAT dispersion >
      • Production machines
      • DISSOLVERS >
        • Laboratory dissolvers
        • Vacuum mixer dissolvers
      • BASKET MILLS >
        • Laboratory basket mills
      • Bead mills >
        • APS Vertical Bead mill
      • Industrial stirrers
      • Rotor stator
      • Accessories >
        • Impellers & milling disks
        • Dispersion containers
        • Milling beads
        • Dispersion & milling
    • Kemtrak Analysers >
      • INLINE TURBIDITY METER
      • Inline Photometer DCP007
      • NBP007 Backscatter probe
      • Fluorescence FL007
      • Measurement cells
      • Accessories
      • Applications
    • Formulaction Turbiscan >
      • Turbiscan >
        • Turbiscan Tlab
        • Turbiscan Tower
        • Turbiscan TAGS
        • Turbiscan Classic 2
        • Turbiscan Oil series
        • TSI stability index
        • Turbiscan Measurement cells
      • Fluidicam
      • Rheolaser >
        • Rheolaser Crystal
      • Applications >
        • Turbiscan Applications >
          • Vaccine stability
    • Inline Refractometers >
      • Inline Refractometer
    • Online particle size measurement >
      • Applications
    • Wilhelm NIemann >
      • Kreis Trial facility
      • Kreis dissolvers >
        • Kreis dissolver KDV
        • ADV top mounted dissolver
        • Butterfly twin shaft dissolver mixer
        • ADVTS triple shaft dissolver mixer
      • Kreis basketmills >
        • Kreis KBM Basketmill flat cover
        • Kreis KBM Basketmill vacuum cover
        • Kreis laboratory pilot Basketmill
    • Brookfield Viscometers >
      • Process viscometers >
        • AST100 Process Viscometer
        • TT100 Process Viscometer
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1. The Dispersion Process

The most frequent application of high speed dispersion is to incorporate extremely fine solid particles into fluids, to produce colloidal suspensions.
Picture

Colloidal suspensions are characterised by their behaviour that the finely divided small particles do not settle under the force of gravity. A sequence of related steps take place during the dispersing process. 

These are: 
  • the wetting of the surface of the solid particles by the fluid components of the millbase
  • the mechanical breakdown of associated particles leading to smaller particles (agglomerates and aggregates)
  • the smaller particles generated during the dispersion are stabilised, preventing renewed association (flocculation).

2. The doughnut effect

The dispersion process is characterised by the rolling flow pattern known as the doughnut effect.

The most effective dispersion takes place in concentrated systems where the impeller tip speed is 18-26m/sec.

The dispersion process is typically completed after 20 minutes
​
Picture

Picture
3. Optimising the dispersion process

It is important for the impeller to be no smaller than 1/3 of the container diameter.   It can be varied to achieve the required rolling flow pattern in the millbase.     

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  • Home
  • Products
    • DISPERMAT dispersion >
      • Production machines
      • DISSOLVERS >
        • Laboratory dissolvers
        • Vacuum mixer dissolvers
      • BASKET MILLS >
        • Laboratory basket mills
      • Bead mills >
        • APS Vertical Bead mill
      • Industrial stirrers
      • Rotor stator
      • Accessories >
        • Impellers & milling disks
        • Dispersion containers
        • Milling beads
        • Dispersion & milling
    • Kemtrak Analysers >
      • INLINE TURBIDITY METER
      • Inline Photometer DCP007
      • NBP007 Backscatter probe
      • Fluorescence FL007
      • Measurement cells
      • Accessories
      • Applications
    • Formulaction Turbiscan >
      • Turbiscan >
        • Turbiscan Tlab
        • Turbiscan Tower
        • Turbiscan TAGS
        • Turbiscan Classic 2
        • Turbiscan Oil series
        • TSI stability index
        • Turbiscan Measurement cells
      • Fluidicam
      • Rheolaser >
        • Rheolaser Crystal
      • Applications >
        • Turbiscan Applications >
          • Vaccine stability
    • Inline Refractometers >
      • Inline Refractometer
    • Online particle size measurement >
      • Applications
    • Wilhelm NIemann >
      • Kreis Trial facility
      • Kreis dissolvers >
        • Kreis dissolver KDV
        • ADV top mounted dissolver
        • Butterfly twin shaft dissolver mixer
        • ADVTS triple shaft dissolver mixer
      • Kreis basketmills >
        • Kreis KBM Basketmill flat cover
        • Kreis KBM Basketmill vacuum cover
        • Kreis laboratory pilot Basketmill
    • Brookfield Viscometers >
      • Process viscometers >
        • AST100 Process Viscometer
        • TT100 Process Viscometer
        • VTE250 Process Viscometer
        • BF35 & PVS viscometers
      • Fulcan solvent dispensers
      • Laboratory viscometers >
        • Rheometers
        • Texture Analysers
      • Applications >
        • Can coating
        • Lithium battery Slurry
        • Food viscosity
    • Novomatics >
      • AlphaTack ink tackometer
      • Lithotack tack meter
      • Lithotronic
  • News
    • Exhibitions
  • Contact
  • FAQ'S
  • Lab mixers