ACA Seminars

Rheology of Coating Colors Seminar

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(a)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(a)aca.fi