Well, I can briefly discussed what we have done so far. These are the materials we have been looking at: Purell hand sanitizer Sams Club hand sanitizer Germ-X Gnarley Green hand sanitizer (just because I want to use Gnarley in a technical report) Jergen's Hand Lotion Bath and Body Works Midnight Pomegranite (funny background story as to why) Techspray's lotion (our current approved standard) We have done a chemical analysis on the materials. Did an ionic transfer study using ceramic plates. Nothing much transfers on the sanitizers, and no measurable ionics on lotions. Did some SIR work - still have to analyze the data but at first glance nothing leaps out at me Presently (today) doing solderability impacts Dielectric Withstanding Voltage tests pending Effects on adhesive bonding pending Based on what I have seen so far, I don't really have too much of a concern on the hand sanitizers. The vast majority evaporates, not much, if any gets transferred to the assembly, and we clean in house anyway prior to conformal coating. The jury is still out on the hand lotions. If you are a no-clean house, you might have more of a concern than I have. Chemically, if you forced me to pick one, go with the Purell. The Sams Club stuff is cheaper, but has some noticable residues and the Purell seems cleaner. Remember, free advice is worth everything you pay for it, but I think you are OK if they are allowed in house. Last summer, when Cedar Rapids went through its major flooding, we were asked to curtail water usage as much as possible to save the one remaining city well that had not flooded. We used primarily hand sanitizers for 3-4 weeks rather than soap and water and we had no incidences during that time of contamination we could trace to these materials. Doug Pauls Roger Mack <[log in to unmask]> Sent by: TechNet <[log in to unmask]> 08/21/2009 11:20 AM Please respond to TechNet E-Mail Forum <[log in to unmask]>; Please respond to [log in to unmask] To [log in to unmask] cc Subject Re: [TN] Contamination by Hand Sanitizers & Lotions 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 Please respond to TechNet E-Mail Forum <[log in to unmask]>; Please respond to [log in to unmask] To [log in to unmask] cc Subject 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 Please respond to TechNet E-Mail Forum <[log in to unmask]>; Please respond to Brian Ellis <[log in to unmask]> To [log in to unmask] cc Subject 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. 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