Electronics Forum | Fri Apr 21 17:46:29 EDT 2006 | SD
First of all, do not use kapton tape! It tends to cause a dewetting effect around the tape. A call to Humiseal will explain why. There's not really a blanket answer to your question.... Removing cured liquid mask can often result in a fillet ef
Electronics Forum | Wed Jan 31 14:07:24 EST 2007 | electronhose
Material, fumes, cured or uncured, all are suspect. Silicone gets on an operator's hands, that operator handles components ( even a day or more later ) silicone is transferred to the solder connections = contamination. Process and workcell control
Electronics Forum | Tue Jan 30 20:38:32 EST 2007 | davef
NASA Internal Advisory: NASA-Issued Return to Flight Wristbands Contaminated with Silicone [snip] 10. PROBLEM DESCRIPTION: Recently we have been made aware of a silicone problem associated with the "Return to Flight" wristbands. These wristbands are
Electronics Forum | Wed Apr 19 16:43:05 EDT 2006 | samir
Silicone-based coatings "repel" most foreign,non-compatible materials like peelable solder mask, and rubber or vinyl boots. The result is, uncured material around the vicinity of where the boot was. Trust me. Been there and done that. As a rookie
Electronics Forum | Wed Apr 19 11:50:05 EDT 2006 | amol_kane
Hi BJ, Everyone's favourite answer...it depends! If the volume if large, masking boots will save you both, time and money in the long run. Custom boots are relatively expensive to buy, but they pay themselves over time by savings on masking tape. ma
Electronics Forum | Fri Feb 02 08:36:14 EST 2007 | CK Flip
Wow, I cut first cut my teeth in the Industrial motor control industry. My 1st company made motor control products like variable speed drives, solid state overload relays, soft starts, etc. and in our shop, we used nothing BUT Dow Corning silicone p
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
Electronics Forum | Sun Dec 26 23:33:38 EST 2010 | raghu
Thanks for your reply sir, We have done production with Machine application earlier, of control electronics sub- assys of some boards with acrylic conformal coating by using one tank... And some boards with polyurathan conformal caoting by usin
Electronics Forum | Wed Jul 29 11:28:54 EDT 2015 | pankyb1261
How many times does it have to flex. There are acrylic conformal coatings that can be bent once to 90 degrees or so
Electronics Forum | Mon Jan 03 00:30:30 EST 2011 | raghu
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 >
