Home                                         Flow and Leveling

 

Input

Enter data   Conversion

Units

                 
Film thickness, χ        

Flow and leveling of a coating is important for the appearance of a coating system. Every application process of a liquid coating results in uneven surface which has to flow and smoothen before drying or curing.

  cm  
Striations, λ per          
    cm  
Surface tension, γ          
  dynes/cm  
Viscosity, ηL          
  Poise   The Orchard equation  t1/2=C1ηL4/γ.χ3 permits the calculation of flow and leveling of coating surfaces as a function of film thickness, viscosity, surface tension and striation of the coating surface. Half Time, t1/2 is A/2.
Constant (C1) t1/2 equation  

0.0133  

   

Results

Half Time, sec, t1/2    t1/2=C1ηL4/γ.χ3 

 
Film thickness, χ                            
   

Viscosity, ηL  

                         

                         
   
   
   
   
   
   
   
   
   
 

Half Time, sec,  t1/2    t1/2=C1ηL4/γ.χ3 

 
Film thickness, χ                            
   
Surface tension, γ                            
                         
   
   
   
   
   
   
   
   
   
 

Half Time, sec,   t1/2    t1/2=C1ηL4/γ.χ3 

 
Surface tension, γ                            
   
Viscosity, ηL                          
                         
   
   
   
   
   
   
   
   
   
Coatings Technology Handbook by Arthur A. Tracton (Editor), S. Orchard Appl. Sci. Res. A11, 451, (1962)

Automatic recalculation 

Last edited on:

October 20, 2010

Copyright, Design, Layout and Technical Content by: