Hi, Though, am not sure what would be the materials use w.r.t. the syrface-materials to be coated.

However, reliable coating processes shall first to have a good preparation of base-material-surfaces..

Following to study the interative affinity between the materials that use on the surface materials to be coated.

Hope this will help.

Cheers!

DA

What coating process??? I Refuse to deal with this beause of total laziness and lack of politeness.

Basta!

Maruti

Wafia has given correctly on the scaling. You can add whether there is a double or single coating applied.

Dr. K

In roll to roll coating, scaling cup an mean width or line speed. There are many parameters that change with both (and

others that do not) and as someone pointed out, it depends on the coating process (for example, with dip coating the thickness varies with line speed, with slot die, the pump speed varies with line speed, but the thickness does not).

I got answer to my question, Please see below details.

Air flow- Dependent

Spray Rate-Dependent

Atomization air pressure-Dependent

Pan Speed-Dependent

Inlet Temp.-Dependent

Occupancy-Independent

Bed temp.-Independent

Maruti, Wafia and Edwin

In coating, no one speaks on coating scale. It is generally told the painter either to have one or two coats. Thus I like to ask Wafia why he wants to know about coating scale? Is thee any problems with the painted paint?

Dr. K

This was with related to Tablets formulation in Pharma Industry.

In the coating process, there are certain parameters that are dependent on the size and scale of the coating material, substrate, and process, while others remain constant regardless of these factors. The former are known as scale-dependent parameters and include coating thickness, surface roughness, and microstructure. On the other hand, scale-independent parameters, such as the chemical composition of the coating material, substrate material, and environmental conditions (temperature, humidity, pressure), remain constant.

The choice and optimization of coating process parameters, such as deposition rate, substrate temperature, gas flow rate, and pressure, can influence both scale-dependent and scale-independent parameters. For example, increasing the deposition rate can lead to a thicker coating, which is a scale-dependent parameter, while the selection of coating and substrate materials can impact the overall adhesion, durability, and performance of the coated product, which are scale-independent parameters.

Therefore, understanding the impact of scale-dependent and scale-independent parameters on the coating process is crucial to optimize the process and achieve the desired coating properties and performance.

Maruti

Thanks for the reply. You wanted to find out the parameters affecting the coating of pharmaceutical tablets. All those replies including mine are useless as they rare related to paints and you want to know the process of medicine tablet coating.

You have to wait a little while as I am out of town. I shall send you the details of the process which will help you in selecting equipment for coating tablets.

Dr. K

You have:

- surface preparation

- time of coating

- coating thikness

parameters of coating process ( for example current density and pH in electrodeposition)

type of substrate materials@

Hello,

what kind of coating process are you working with?

you may also consider coated area, substrate temperature, substrate roughness, particle size, resultant microstructure, etc.

Substrate surface properties : Surface Free Energy, disperse part, polar part.

Viscosity of coating material, coating weight, etc