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.
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.
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
Electronics Forum | Fri Jan 16 06:53:33 EST 2009 | stevewilde
I am using Humiseal 1B31 conformal coating and xylene mix on a PVA coating machine. Bubbles are appearing between the pins of LCCs mainly and bubbling is worse when put through the IR oven. Does anyone have any suggestions or tips to elliminate this
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
Electronics Forum | Thu Jul 29 00:50:37 EDT 2004 | C.W
Anyone has experience with Humiseal 1B31LOC and 1B31? Their material properties(physical, chemical, temp. etc) are fairly much the same after cure but there are some differences when they are at liquid stage. We are currently using 1B31 but is planni
Electronics Forum | Mon Dec 28 09:12:56 EST 2009 | kpm135
@tommyg_fla According to the TDS the recommended coating thickness for Humiseal 1B31 is only 1-3 mils so if I had to guess I would say your issue might be that you're re-coating over the first pass too soon. All the solvent hasn't evaporated and the
Electronics Forum | Sat Jul 31 08:12:07 EDT 2004 | sforman1
Why even worry about VOC's when there are excellent UV cure materials to coat PCB's Sam Forman Microcoat Technologies
Electronics Forum | Sat Feb 24 09:49:26 EST 2018 | davef
+$3 / ounce * Humiseal 1B31 => ~$2.50 / ounce ... assuming same coverage thickness and that
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
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