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Subject:
From:
Michael Fenner <[log in to unmask]>
Date:
01 Sep 96 06:06:56 EDT
Content-Type:
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In message <[log in to unmask]> [log in to unmask]
(Doug McKean) writes:
> We are currently having our board assembly house use a quick drying glue 
> to secure a 30AWG wire to the pcb for a modification.  

-------
Pete Swanson subsequently made some suggestions re cyanoacrylate cure mechanisms
and  accelerators which prompts me to add a little more.
If you are getting low SIR after using a cyanoacrylate with accelerator try
using plain alcohol  as an accellerant instead . The hydroxyl ions in the
alcohol will  set the glue off quite handily  and of course the alcohol will
evaporate off leaving no residues at all.
You can apply the alcohol prior to assembly by simply wiping the board surface.
Even though it dries off rapidly there should be enough molecules adhering to
the surface to set off a quick cure. If not,  additionally or alternatively,
puff on alcohol after placing glue with a trigger spray bottle. 
A usual convenient source of  alcohol is wave solder  flux thinner but any sort
will do -the only proviso in your application would be that the alcohol is pure
enough not to leave behind residues of its own.

Mike Fenner
BSP

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