Electronics Forum: acrylic conformal coating (Page 1 of 110)

defect on PCB acrylic conformal coating

Electronics Forum | Wed May 08 14:24:22 EDT 2013 | wahahasteven

we are using acrylic conformal coating on the PCB. Under the same program, same parameters (not changing anything on the machine), and we always found one or two boards have some spots which are not coated (shown as picture). The location of the spot

defect on PCB acrylic conformal coating

Electronics Forum | Wed May 08 20:14:24 EDT 2013 | davef

What happens when you rework those non-coated areas? Please list your rework steps Br, davef

defect on PCB acrylic conformal coating

Electronics Forum | Thu May 09 13:49:24 EDT 2013 | davef

First, it appears that your solder mask and your coating material appear to be incompatible. Second, IPA leaves a residue that's probably not compatible with your coating material, either. IPC-HDBK-830 - Guidelines for Design, Selection and Applic

defect on PCB acrylic conformal coating

Electronics Forum | Thu May 09 10:12:08 EDT 2013 | wahahasteven

this is one of my project. I have tried to remove coating only on those areas with alcohol and thinner, then program the machine to coat the removed area again. But the result obviously shows that two different tones of coating on the board. I also

conformal coating

Electronics Forum | Thu Apr 16 10:13:32 EDT 2015 | charliedci

Anyone aware of an acrylic conformal coating that is UV curable?

conformal coating

Electronics Forum | Fri Apr 17 08:52:03 EDT 2015 | charliedci

Thanks for the info Sarason. The UVCL is a Urethane. Did not want that hard of finish (for solder rework issues). We like the Acrylic as acetone will remove cured material for solder rework.

1B31 Acrylic conformal coating problems

Electronics Forum | Mon Dec 27 10:03:35 EST 2010 | duso02

Contact your distributor for the coating or Humiseal directly. Humiseal has had a recent issue with batches of 1B31. The specific problem is lack of adhesion, which is what you have as well. You need to find out if your batch # is one of the affected

Re: conformal coating selection

Electronics Forum | Mon Nov 27 13:36:41 EST 2000 | C.K.

You'd more than likely have repairability issues with the Acrylic based one. The acrylic-based finish is alot harder and more brittle versus the silicone. Some of the new silicones, you can just "peel" with your fingernail, while still getting reli

Problem with conformal coating

Electronics Forum | Wed Feb 23 10:01:00 EST 2005 | frankracine

Dave, Few questions concerning your Umiseal 1B73. To cure your Acrylic coating do you respect specification ( 2Hrs-170degree F) or you go faster than that? What do you use to cure it? Do you have to clean your nozzles each day or each monday beca

1B31 Acrylic conformal coating problems

Electronics Forum | Sun Dec 26 23:48:01 EST 2010 | raghu

Dear Sir, We are using 1B31 conformal caoting of 48 sec viscosity in Zahn #1 cup, by machine(PVA354) application with Tank air pressure 2.3 psi, automising air pressure 1 psi. 7 days after application we are observing peeling off problem.. And n

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