Hey Les ; you got yourself a nickname !
Sorry Linda ; I should have put a comma in between ;
I'd presume Les is a very much silicon free fellow from the Swiss of South
Seas (New Zealand).
Come over for Cup , racing yachts here down south is a real fun (half of the
masts break usually).
I will check you our silicon applications database ;
if you can tell me what application is it .
thanks for cheering me up, Linda
Paul Klasek
ResMed
-----Original Message-----
From: Linda:) [mailto:[log in to unmask]]
Sent: Wednesday, 22 September 1999 12:27
To: [log in to unmask]
Subject: Re: [TN] Moisture Proof Encapsulation
Hi Paul,
What 's your "silicon Les"? a kind of epoxy? bought from "Dow Conning" too?
Could it
withstand high temp such as 220C?
thx,
Linda:)
~~~~~~~~~~~~~~~~~~
Paul Klasek wrote:
> I'd go with silicon Les ;
> when in open outdoor elements ; anything else is struggling to meet it's
> resilience .
> I've have a various profiles, shapes and application prototypes being
truly
> life tested
> anchored in cliff rock in pounding surf for a couple of years on one of my
> locations :
>
> everything else (epoxy, metals, urethanes, cements, socalledsuperglues,
> etc.)
> gave up within months in waves, salt, sand, and UV.
> Even crabs don't like it ; human's ain't around (need to absail to it) ;
> so silicon lives well in most applications ;
> (unless misdesigned by Dow)
>
> Your's is obviously design dependent as well : experiment .
>
> Paul Klasek
> ResMed
>
> PS
>
> CLEAR moisture fav is definitely Si.
> But you have to have design consideration on application :
> For example lip inwards to hold the silicon plug = passive mechanics
needed
> ;
> silicon is a sealant , not adhesive .
> I'd distrust adhesives in general anyhow (aging)
>
> -----Original Message-----
> From: Les Hughson [mailto:[log in to unmask]]
> Sent: Wednesday, 22 September 1999 10:42
> To: [log in to unmask]
> Subject: [TN] Moisture Proof Encapsulation
>
> I have a small temperature sensor pcb which is to be sealed into an
> enclosure, one side of which is in contact with warm water and may leak
> slightly, the other side is in air, probably encountering condensation.
>
> My problem is how to get impartial advice on what is the best type of
> encapsulation compound to use. e.g. Silicone Rubber, Epoxy Resin,
> Polyurethane Resin etc. Various manufacturers all have their own range of
> products and will recommend one from there range but I have not found a
> single source which manufactures the various different types of compound
> listed above and can tell me which would be best.
>
> So. Does anyone have any experience of comparing these different types of
> materials...
>
> Silicone Rubber.
> Epoxy Resin.
> Polyurethane resin.
> Others?
>
> Is there a clear favourite for moisture protection?
>
> Any advice would be much appreciated. :-)
>
> Les Hughson, BEng.
> Product/Software Engineer
> Spa-Quip Ltd
> Tel (+649) 415 8622
> Fax (+649) 415 8621
>
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