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September 2011

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Subject:
From:
"Stadem, Richard D." <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Stadem, Richard D.
Date:
Wed, 14 Sep 2011 13:58:40 -0500
Content-Type:
text/plain
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text/plain (250 lines)
The people working at McDonald's have a salary that we engineers can only dream of.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge Hernefjord
Sent: Wednesday, September 14, 2011 12:51 PM
To: [log in to unmask]
Subject: Re: [TN] Pneumatic Syringes and ESD

Phillip,
those guys work in a multi billion industry. They have probably a salary
that we in electronics can only dream of.
/Inge

On 14 September 2011 19:39, <[log in to unmask]> wrote:

> I never knew there was a society of cosmetic chemists.
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge Hernefjord
> Sent: Wednesday, September 14, 2011 3:33 AM
> To: [log in to unmask]
> Subject: Re: [TN] Pneumatic Syringes and ESD
>
> Doug,
>
> Triboelectric means adding or stealing electrons through friction. How
> can a
> uncured glue (liquid with a high viscosity) move electrons from your
> nozzle?
> I've been in the game for decades and not heard about such things. I've
> participated in p-p courses, glue courses, read lots of articles etc,
> but
> missed what you insist.
>
> Human and dry hair has a molecular crystal-like surface, and via the
> Fermi
> level you can move electrons from the orbit. However, if your hair is
> fat,
> there will be no charge movements, because the fat has no specific
> surface
> for that purpose. Likewise, I thought uncured glues were no aspirants
> either.
>
> Well, never too late to learn something new.
>
> Inge
>
>  Relationship between *triboelectric* charging and surface *...*
> <http://search.mywebsearch.com/mywebsearch/redirect.jhtml?qid=62bac059e5
> f09cb4c1291b201f0024f4&searchfor=kinetic+explanation+of+triboelectric+ch
> arges&action=pick&pn=1&n=77decd8b&ptb=naCNCR5Azm75RkmBmXss1w&ptnrS=ZRxdm
> 784YYSE&ss=&st=hp&cb=ZR&pg=GGmain&ord=4&tpr=hpsb&redirect=mPWsrdz9heamc8
> iHEhldEWVlFOy8LXVdR6PzojpERxbLlEmRQOowS8Qj5BmJGVqQkswtwN%2FH7EAkxVp0REdx
> DZ8QU9G9gHdhVQrRQ2vn%2FnU%3D&ct=AR>
> bleaching, and oxidative dyeing has only a small effect on
> *triboelectric*charging. Measurements of the
> *kinetics* of *charge* decay indicate that none of these *...*
> http://journal.scconline.org/pdf/cc1985/cc036n03/p00189-p00212.pdf -
> Cached<http://search.mywebsearch.com/mywebsearch/redirect.jhtml?redirect
> =GGcached.jhtml&action=click&searchfor=kinetic%2Bexplanation%2Bof%2Btrib
> oelectric%2Bcharges&curl=http%3A%2F%2Fjournal.scconline.org%2Fpdf%2Fcc19
> 85%2Fcc036n03%2Fp00189-p00212.pdf&isDirResults=false&tpr=hpsb&cid=KYJrE_
> TQtsAJ&ptnrS=ZRxdm784YYSE&st=hp&ptb=naCNCR5Azm75RkmBmXss1w&ct=GC&pg=GGma
> in&n=77decd8b>
>
>
>
>
> On 13 September 2011 20:06, Douglas Pauls
> <[log in to unmask]>wrote:
>
> > The coating is insulative in its liquid state as well.
> >
> > Doug Pauls
> >
> >
> >
> > "Mike Fenner" <[log in to unmask]>
> > 09/13/2011 12:48 PM
> > Please respond to
> > <[log in to unmask]>
> >
> >
> > To
> > "'TechNet E-Mail Forum'" <[log in to unmask]>,
> <[log in to unmask]>
> > cc
> >
> > Subject
> > RE: [TN] Pneumatic Syringes and ESD
> >
> >
> >
> >
> >
> >
> > You would have to check with supplier, or verify it yourself; but
> though
> > the
> > coating is insulating when cured it may well not be uncured in liquid
> > form.
> >
> > Regards
> >
> > Mike
> >
> > -----Original Message-----
> > From: TechNet [mailto:[log in to unmask]] On Behalf Of Douglas Pauls
> > Sent: Tuesday, September 13, 2011 4:53 PM
> > To: [log in to unmask]
> > Subject: [TN] Pneumatic Syringes and ESD
> >
> > Good morning all,
> >
> > Time for a silly question.  The question has been raised internally as
> to
> > the risk of ESD generation when an acrylic conformal coating (an
> > insulative material) is applied using pneumatic syringes (also an
> > insulative material), through a nylon brush (a third synthetic
> material).
> >
> > 1.  Do you know of any studies done benchmarking static generation
> levels?
> >
> >  We have done some here, but want to do a sanity check.
> > 2.  If you have such devices in your facilities, what are your
> mitigation
> > efforts?  Air ionizers, grounded tubes?
> > 3.  Does anyone use, and can recommend, ESD safe syringe bodies and
> caps?
> >
> > Many thanks in advance.
> >
> > Doug Pauls
> > Rockwell Collins
> >
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