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ACA Seminars

Rheology of Coating Colors Seminar

aca systems seminars

Want to learn more about coating rheology?

Rheology Seminars are designed for teams that want to get a better  understanding of coating rheology.

1 day seminar: 350 € / person (Min. 10 persons)

 

Contact us for more info:
Tel. +358 13 569 911
E-mail: info@aca.fi

Download Seminar brochure

 

The content of the seminar:


1. Fundamentals of Rheology

  • What is rheology
  • Elastic materials: solids
  • Viscous materials: fluids
  • Shear stress, shear rate and viscosity
  • Flow curves (shear thinning and thickening)
  • Extensional viscosity
  • Laminar and turbulent flow
  • Normal forces

2. Rheology of Coating Colors

  • General description
    – Surface chemistry
    – Hydrodynamic factors
  • Rheology of suspensions
  • Effect of coating color components
    – Pigment
    – Latex
    – Thickeners
    – Dispersants
  • Water retention / dewatering

3. Viscometers and Coating Process

  • Shear rates of coating process and viscometers
  • Brookfield viscometer
  • Rotational viscometers
  • Capillary viscometers
  • Comparison of viscometers

4. Blade Coating

  • Principle of blade coating
  • Application of coating color
    – Roll application
    – Short dwell application
    – Jet application
    – Comparison of application methods
  • Shear rate beneath the blade
  • Viscosity and coat weight development
  • Rheological runnability problems
  • Non-Newtonian rheology

5. Film Transfer, Spray and Curtain Coating

  • Comparison of coating methods
  • Film transfer coating
    – Advantages and limitations
    – Rheology and runnability
  • Spray coating
    – Advantages and limitations
    – Rheology and runnability
  • Curtain coating
    – Advantages and limitations
    – Rheology and runnability

6. Interpretation of Flow Curves and Coating Color Development

  • Shape of the viscosity curve
  • Additional remarks on interpretation of flow curves
    – Shear rate – shear stress – viscosity
    – Effect of solids content
    – Effect of temperature
  • Practical examples of interpretation
  • Coating color development
    – Ideal coating color
    – Improving productivity
    – Improving optical properties

 



Contact us for more info:

Tel. +358 13 569 911
E-mail: info@aca.fi

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