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September 2011

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Subject:
Re: Pneumatic Syringes and ESD
From:
Inge Hernefjord <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Inge Hernefjord <[log in to unmask]>
Date:
Wed, 14 Sep 2011 23:07:39 +0200
Content-Type:
text/plain
Parts/Attachments:
text/plain (344 lines) 
While we seriously dicuss pneumatological issues Dewey puts on airs

Inge

On 14 September 2011 21:06, Whittaker, Dewey (EHCOE) <
[log in to unmask]> wrote:

> That's because they acquire their skills in short-order; whereas some
> people feel we can never be trained.
> Dewey
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
> Sent: Wednesday, September 14, 2011 11:59 AM
> To: [log in to unmask]
> Subject: Re: [TN] Pneumatic Syringes and ESD
>
> 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<http://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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