Corona Treating materials for printing

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metron9
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Posted by metron9: Mon. Oct 29, 2012 - 03:49 AM
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I own a screen printing shop, we also have a digital printing press that needs treated material for the ink to stick. The material we buy has what is called digiprime5000. It is a water based primer. To get a water based primer to stick to vinyl (PVC) the dyne level must be about 42.

Corona treating brings the dyne level up to the required level to allow the coating to bond.

Corona treatment machines run around $25,000.00

I don't know what voltages or how much current it requires. Does anyone know the voltages and current necessary to treat PVC? We use 3 1/2 mil Vinyl with adhesive and an 80 pound liner (paper liner with polypropylene surface to allow liner to be removed from adhesive).

I have found some 20kv units and down the page it shows a unit that can be stacked or be used with a stacker (not sure what that is yet) to allow up to 100kv.

http://www.amazing1.com/hv-hf-po...

I see one youtube video from a DIY project.
http://www.youtube.com/watch?v=S...

Any input from you plasma folks?

Two corona treatment companies I have contacted are
http://www.enerconind.com/home.aspx
http://www.corotec.com/techinfo/...

Tags:

Learning and Information, General Electronics
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Torby
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Posted by Torby: Tue. Oct 30, 2012 - 08:09 PM
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I don't know about anybody else here, but you're way outside my area of expertise.

The largest known prime number: 282589933-1

It's easy to stop breaking the 10th commandment! Break the 8th instead. 

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metron9
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Posted by metron9: Wed. Oct 31, 2012 - 01:16 AM
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I found another corona treatment company. They make all the components in house and have been in the business for a long time. I got a quote today on a machine that will run 1500 sq feet per hour of the material i need to treat.

The Voltages they use would be 10,000 volts and a power of 350 watts.

So the link I provided above, assuming I could make the other components would treat at a slower rate at 200 watts.

The machine they have showed me is a very robust looking machine, all stainless steel (ozone wont rust it) and their long history of building these machines, I think will tip the scales for me and I will buy from them, especially as it is in a company environment with employees.

I may just buy one of the cheap power supplies to play around with high voltage plasma, looks pretty cool. I will check with a close friend I know about safety when working with these things. Nobody has played with these things here?

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DocJC
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Posted by DocJC: Wed. Oct 31, 2012 - 02:41 AM
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I'm willing to bet that some Freaks have played with Jacob's Ladders.

Wiki Spark Gap: http://en.wikipedia.org/wiki/Jac...(engineering)#Visual_entertainment

I made mine years ago with a Model T Spark Coil, and also with a neon sign transformer.

Very cool to tinker with.

JC

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stevech
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Posted by stevech: Wed. Oct 31, 2012 - 03:18 AM
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I know some about Corona
(er, the stuff you drink).

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Torby
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Posted by Torby: Wed. Oct 31, 2012 - 02:00 PM
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Always wanted to make one of those. Ultimate mad scientist apparatus.

The largest known prime number: 282589933-1

It's easy to stop breaking the 10th commandment! Break the 8th instead. 

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