Electronics Forum | Tue Jan 31 12:19:29 EST 2017 | ttheis
We're looking to add conformal coating to some of our pcb's which range from 2x2" to around 6x6". I would like to use a coating material that is not nasty smelling requiring ventilation or filtration if possible. Are there conformal materials that ar
Electronics Forum | Tue Jan 31 13:41:41 EST 2017 | tombstonesmt
Dow Corning 3-1953 is widely used when it comes to silicone based conformal coatings. Low odor, medium viscosity, can be atomized or needle dispensed. We have our operators fill syringe cartridges for any minor touch up.
Electronics Forum | Wed Feb 01 12:24:48 EST 2017 | ttheis
Thanks, I'll give that a try!
Electronics Forum | Mon Feb 20 13:02:22 EST 2017 | ttheis
We tried both of these suggestions and the 3-1953 is less viscous than the 3-1944 so it will flow better on the board for our conformal coating application. What cleaning solvent is recommended for cleaning off the auger parts, etc.? I haven't been
Electronics Forum | Fri Feb 03 15:39:01 EST 2017 | ttheis
Thanks, we'll try this too. We aquired an asymtek millenium for dispensing selectively. It is setup for epoxies with a needle dispense head so we'll try to make it all work for us. One-part silicones seem to be the popular solution.
Electronics Forum | Mon Feb 06 16:15:08 EST 2017 | ttheis
Great, that is encouraging. I did order a few needle sizes from McMaster to try out when we get the machine setup. What do you recommend for clean up the equipment?
Electronics Forum | Wed Feb 22 08:46:14 EST 2017 | westshoredesign
https://webaps.ellsworth.com/edl/Actions/GetLibraryFile.aspx?document=2922〈uage=en
Electronics Forum | Wed Feb 22 09:17:08 EST 2017 | ttheis
Great; which do you recommend, 10, 20 or 30? Seems to me the 10 is most concentrated and 30 is least concentrated according to the flammability properties table. I'm not sure which would be best and I'd rather not try them all.
Electronics Forum | Tue Feb 07 12:26:14 EST 2017 | westshoredesign
Oh yeah, so we have a auger valve similar to that on one of our other machines that we use for dispensing SMT glue, and solder paste also. We have a conditioner that we flush it with at EOD when in use, then we just let it sit idle with the condition
Electronics Forum | Fri Feb 03 15:32:28 EST 2017 | westshoredesign
Not sure exactly what kind of coverage your looking to get but we use Dow Corning 3-1944, it's room-temp cure and rather thick, (think warm honey). But we have found it useful on several projects. http://www.dowcorning.com/applications/search/produc
