Electronics Forum | Wed Dec 02 18:50:05 EST 2009 | smt_guy
why brush? why not spray?
Electronics Forum | Thu Dec 03 08:22:18 EST 2009 | jdumont
Thanks, no ESD concerns using a non conductive brush though?
Electronics Forum | Thu Dec 03 09:27:15 EST 2009 | duso02
Once you dip it in liquid, the make-up of the brush does not really matter as it is now coated. A dry brush is a different story.
Electronics Forum | Thu Dec 03 07:09:59 EST 2009 | jdumont
We spray with an Asymtek C-740 system. However, some very small PCBs we do by hand and we also touch up after a PCB has to be repaired.
Electronics Forum | Thu Dec 03 07:37:44 EST 2009 | duso02
The quality of the brush is most important. We use artist brushes from Torrington Brush Works. Sable works best but are the most expensive. We use more camel hair. They work best for us as we "hand coat" hundreds of boards a week and go through many
Electronics Forum | Wed Dec 02 14:54:52 EST 2009 | jdumont
Hi all, just wondering what type of brushes you all are using to manually touch up/apply your conformal coatings? We use an solvent based acrylic and do minor touch ups as they are processed. Occasionally we will have a bristle or two come off the
Electronics Forum | Wed Dec 02 10:14:42 EST 2009 | duso02
As a large coating house we use 1B73 daily and we have very few issues with bubbles. We very rarely bake it as the air cure is so short. Also, we only use thinner 73 vice 521. Another question would be; how is it being applied? How thick are you appl
Electronics Forum | Fri Jul 04 06:29:51 EDT 2008 | andrzej
Hi, 1. we use John C. Dolph company - AC-46 on production line. I dont get any benefits advertising this on forum (but I`d wish to ;) 2. we use stickers, or other hand made tools to cover areas from AC-46 - it depednds on need for project.
Electronics Forum | Tue Jan 13 16:40:03 EST 2004 | Jacob Lacourse
Hi folks, I have a conformal coating application where I need the coating to be UV stable for a number of years without any crazing or cracking of the coating. I have looked for such a coating and have come up empty handed. Much of the circuit boar
Electronics Forum | Sat Jan 23 07:08:54 EST 1999 | Graham Naisbitt
| I have boards coated with Humiseal 1B73. At a late point mfg. site we need to remove a series of 0603 resistors for optioning purposes. I have been trying to determine the fastest, easiest way to re-coat the pads after removal. Drying time of the c
.gif)
