Electronics Forum | Fri Feb 26 12:01:08 EST 2010 | jdumont
Hey its probably the silicone adhesive
Electronics Forum | Mon Mar 01 07:24:55 EST 2010 | jdumont
No problem just busting, trying to keep the mood light! Cheers
Electronics Forum | Thu Feb 25 10:21:49 EST 2010 | jdumont
My guess would be that the adhesive used on the dots contains silicone. We use 1B73 which is also acrylic and it hates silicone. We use silicone RTV to permanently mask around some connectors and unless its fully cured before coating it will cause l
Electronics Forum | Fri Feb 26 10:42:56 EST 2010 | mleber
Your masking dots are a silicone adhesive. Contact the supplier and tell them you need an acrylic adhesive on the same dots. Normally same cost and lead time.
Electronics Forum | Thu Feb 25 10:30:21 EST 2010 | davef
It sounds like your poly dots are secreting something that affects coating thickness. Is this a function of the adhesive used by poly dot supplier?
Electronics Forum | Tue Oct 01 08:35:03 EDT 2019 | robl
For brush and dip coating we are using professional fume cabinets - https://monmouthscientific.co.uk/products/fume-cupboards/ 1.8m sized.
Electronics Forum | Mon Sep 30 16:16:17 EDT 2019 | stephendo
We use "Uline N95 Deluxe Industrial Respirator" face masks. We are looking for something better. Our conformal coating machine has an active exhaust pulling fumes out and the door is closed when the machine is running. We have a fume hood with an act
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
Electronics Forum | Fri Feb 26 10:34:03 EST 2010 | kpm135
If I had to guess I'd say they're using a silicone based adhesive.
Electronics Forum | Fri Feb 26 15:41:19 EST 2010 | kpm135
sorry jdumont I didn't see your post until after I posted mine for some reason. If I had seen it first I wouldn't have posted because yours covered it.
