If there is any chance of getting results sooner I would be interested.
Based on the earlier technet conversations we have not been supplying
operators with sanitizers and encouraging hand washing. However, just like
ESD lotion, whether you supply the floor or not, you have to be on the
watch for unapproved materials from home being used.
Just this week the request for sanitizers has come up again with back to
school and flue season only 2 weeks away. The recent flues going around do
cause some panic and it would be great to have some data to back up any
position we take on sanitizer use.
Roger Mack P.Eng.
Manufacturing Specialist
Parker Hannifin Corporation
Electronic Controls Division
1305 Clarence Avenue
Winnipeg, MB R3T 1T4 Canada
direct 204 453 3339 x373
www.vansco.ca
www.parker.com
Douglas Pauls <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
2009-08-21 10:45
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Re: [TN] Contamination by Hand Sanitizers & Lotions
Good morning all,
Being blessed with an abundance of bright young co-op students, we are
doing a study of the topic here at Rockwell Collins. The study will
finish in a few weeks and I plan on publishing the results, probably at
Apex.
Doug Pauls
Rockwell Collins
Brian Ellis <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
08/21/2009 01:17 AM
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Re: [TN] Contamination by Hand Sanitizers & Lotions
Apart from the thread on this subject here a month or two back, the only
mention in literature that I know of is in my book, which discusses in a
diagrammatic form not only the effect of lotions before and after
soldering. Sanitisers didn't exist in those days, but their effect is
similar to lotions, although their oily components are lower.
As an addendum to my post in the earlier thread, I was back in hospital
for another operation last week and found that they had placed
squirt-bottles of sanitisers every 5 m along all the corridors,
presumably as an anti-H1N1 measure. This allowed me to have better
access to the stuff and I found that the hand was persistently
contaminated. I was able to repeat my mirror test 2 or 3 hours after
deliberately using the sanitiser correctly, being careful not to handle
anything in the meanwhile. As one of the components is a high molecular
weight polymerised glycol, it is a reasonable assumption that this is
the persistent substance. As it is hygroscopic, it is also a reasonable
assumption that it's not going to improve sensitive electronics if
transferred from the hand to an assembly. If such transfer occurs before
soldering, then the heat may cause further polymerisation, rendering the
hygroscopic residues more difficult, maybe impossible, to remove.
Brian
Diljit Matharu wrote:
> Can someone direct me to resources which talk about PCBAs contamination
by the use of hand sanitizers & lotions.
>
>
>
> Thanks,
>
>
>
> Diljit S. Matharu
> Quality Leader - B C
> Creation Technologies
>
> Office: 604.430.4336 x 3395 | Mobile: 778.240.8144
> 8977 Fraserton Court | Burnaby, BC, Canada | V5J 5G1
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