Controlled by pull-up speed and viscosity of coating liquid
⇒ Generally, a faster pull-up speed results in a thicker film, while a slower pull-up speed results in a thinner film.
Case a：When the pull-up speed is high and the viscosity of the coated liquid is high
The film thickness in this case is determined by the balance between viscous resistance and gravity.
Case b：When the pull-up speed is sufficiently slow and the viscosity of the coating liquid is low
The surface tension at a gas and liquid interface governs the film thickness, and the following relationship holds.
U is the pull-up speed (m/s)、 is viscosity (Pa・s = kg・m/s)、 is density of coating liquid (kg/m3).
is the surface tension of a liquid (N/m).
g is gravitational acceleration (m/s2).
C is coefficient (0.8 for Newtonian fluid)
In dip coating, Newtonian fluid is basically used as the coating liquid.
The standard F and M series for R&D are equipped with calculation software as standard.
Please use it to calculate the theoretical of film Thickness.