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August 2012

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Subject:
From:
Douglas Pauls <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Wed, 29 Aug 2012 11:52:35 -0500
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You should also make sure you have an oil and water trap and in-line drier 
feeding your system.

Doug Pauls



From:   Paul Edwards <[log in to unmask]>
To:     <[log in to unmask]>
Date:   08/29/2012 11:49 AM
Subject:        Re: [TN] Cloudy Conformal Coating
Sent by:        TechNet <[log in to unmask]>



Check to see if you have excessive moisture in the CDA line going to the 
spray head...

Paul

Paul Edwards
Process/Quality Engineering
Surface Art Engineering


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Blair Hogg
Sent: Wednesday, August 29, 2012 7:04 AM
To: [log in to unmask]
Subject: [TN] Cloudy Conformal Coating

I'm hoping that Technetters can share some light on an issue that we 
occasionally experience here - we coat some of our boards with 1B73 
conformal coating, for some we have a spary machine, others a sprayed by 
hand. 

Every so often we will process some board through coating and they will 
have a cloudy / milky appearance in the coating. We have been told 
previously that this happens when humidity is up, since our manual spray 
coating area is not in an air-conditioned environment. 

Anyone else ever have this problem? How did you fix it? 

Thanks,

Blair

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