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Wednesday, 18 September 2019

Electrostatic spray waterbased paint

4 Posts

Friday 22 August 2003 1:00:00 am

Our customer plans to move into waterbased system at their Ransburg Disc Spray Line with our low bake waterbased system. How's waterbased system work on electrostatic spray, what parameter required to give the best line finishing. Is dehumidifier crucial ? Should the internal charger present or only external charger needed ? Please advise.

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Friday 22 August 2003 1:00:00 am

I´m not sure, but perhaps you won´t see any changes bettwen normal and electrostatic application. See, electrostatic work well with solvent based paints, because they have some degree of resistivity, enought to let the paint to hold the electrostatic chargue and generate the bi-polar atracction over the grounded part that inbrease transfer efficiency. But if you work with water, it have high conductivity, which would make hard for the paint to hold such electrostatic charge. Nevertheless, this is just theory. Try to make some test with your paint in some other facility with electrostatic equipment available, and see what´s happens.
Good Look
Tomas

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Wednesday 27 August 2003 1:00:00 am

We have applied waterborne aluminiums and primers using electrostatic eqipment - no problem. We did not have to add any special RM to our formula but the VOC's were < 10gm/litre.
It did require special electrostatic equipment (isolated from earth)costing $7500 for a very small container (10lts) and gun.
I think the draw back will be not the formulation but the cost of converting the plant to use WB.
Waterborne products will require a much longer track to before entering the oven area. Warm air blowers (you could capture the warm air leaving main baking oven to save on costs) prior to baking with a good flow of air to remove the localised humidity hanging around the components will help to reduce times. You may also require anti bubble additive as this method of application seems to produce more "micro" bubbles than normal.
Hope this helps
Terry

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Wednesday 01 October 2003 1:00:00 am

I do not agree. How do clouds hold such high charge? Issue is with water droplets, how much charge you can hold. I see no difference between the solvent based and water based paints for electrostatic application except that they may be too highly conducting and might short circuit the gun components in their present configuration. Some changes in the gun may be necassary.

Uthayakumar Kandasamy

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Tuesday 21 May 2019 10:44:30 am

Hi friends,
Currently I am using Stoving enamel based paint for Aluminium Alloy Mesh but having bare spots due to problems in paint or our process. Can any one suggest Electrostatic spray system for our applications. I am ready to invest in new system. Paint need not water based but any solvent based is ok. I can send more details if you send me your email ID to
kumar@qualitywire.com.bh

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