Electronics Forum: humiseal thinner (Page 1 of 2)

Conformal coating bubbles with 1B73

Electronics Forum | Tue Mar 01 15:07:00 EST 2011 | dennisfo

Update on 1B73 bubbles, Changed over to a mixture of Humiseal 73 thinner with coating (25 sec on Zahn 2) observed a reduction in bubble formation (approx. 20%) but still present.

PVA Conformal Coating Machine

Electronics Forum | Thu Dec 15 10:43:51 EST 2005 | chunks

Hi Amol, We use the PVA system and also conformal coat over no-clean reflow solder as well as no-clean wave. We use a Humiseal coating and thinner.

Bubbles in Conformal Coating

Electronics Forum | Mon Jan 19 09:10:17 EST 2009 | stevewilde

Thank you for all of the advice. I am using the extended spray for these cards. Humiseal have recommended using their own thinners 600 instead, so will run some trials with this and also the humiseal pre-mixed material (at the moment we mix our ow

Conformal coating bubbles with 1B73

Electronics Forum | Wed Feb 16 12:22:54 EST 2011 | duso02

Have you always used xylene? For our 1B73 we use nothing but 73 thinner from Humiseal or PGMEA at about 50/50 depending on the humidity.

Conformal coating bubbles with 1B73

Electronics Forum | Wed Feb 16 12:47:58 EST 2011 | dennisfo

I've been here approx. 3 months. It was indicated that Xylene has alwas been used but it was never indicated that bubbles were not present in the past (ignored or touchup). I have a sample of Humiseal 73 thinner ordered for testing. We've been thinne

Bubbles in Conformal Coating

Electronics Forum | Thu Jan 22 09:04:22 EST 2009 | mefloump

Humiseal recommends a 1 to 1 mix ratio of 1B31 and Thinner 521. I have for that I need to thin my ratio more to get humiseal to spray correctly in our PVA650. Also I am using Humiseal 1B73 but the tech data sheets say the same for spraying. Try thinn

Conformal coating mask dots and halos

Electronics Forum | Thu Feb 25 07:37:42 EST 2010 | pcbrown

We are using Humiseal 1B31 and polyester dots for masking. We are spraying this in a Binks sprayer mixed at almost 1:1 with 521 thinner. Whe are seeing the coating creating thin halos around the poly dots as if the dots are "rejecting" the coating. T

Bubbles on solder joint(after conformal coating curing)

Electronics Forum | Thu Nov 19 05:18:37 EST 2009 | prodivegsr

Hi All, Recently we are working on the conformal coating process using Humiseal chemical 1B73 and thinner 521. Bubbles on component body/joints are seen after gone through the IR Reflow Oven. During the conformal coating, only tiny bubbles seen af

Acrylic Coating De-Wetting?

Electronics Forum | Tue Jul 25 16:08:52 EDT 2017 | dontfeedphils

I'm currently working on bringing a manual coating process/workcenter online and my QA team is giving me some grief. For background, we're using Humiseal 1B31 thinned with thinner 521, mixed at 1:1 by volume. Spraying through a Binks HVLP with 10 P

Humiseal 1A33 conformal coating using automated atomized spray

Electronics Forum | Tue Jul 03 01:54:42 EDT 2018 | rdhiman1

Reaching out to all conformal coating experts, please help! While setting up conformal coating using the automated atomized spray, we observing issues associated with conformal coating wetting on the following regions: 1) Component edges 2) Metalli

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