Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Hand Lotions

Joshua Brown

#19039

Hand Lotions | 4 March, 2002

What hand lotions are recommended for use with electronics manufacturing. Also what chemicals in regular hand lotions are toxic or harmful when used in electronic manufacturing.

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#19042

Hand Lotions | 4 March, 2002

Joshua, I would resommend using an ESD lotion. I can provide you with some more information if you would like to email me off-line or you can contact me at 908-782-4140 x247.

Regards,

Jerry

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#19044

Hand Lotions | 4 March, 2002

Joshua, I would recommend using an ESD lotion. I can provide you with some more information if you would like to email me off-line or you can contact me at 908-782-4140 x247.

Regards,

Jerry

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CAL

#19047

Hand Lotions | 4 March, 2002

I don't like hand lotions in the assembly area. If hand lotion is needed I would have the operators use latex gloves or finger cots. The lotion can be transfered to the bare board or assembly causing reliability issues. Lotion transfered to a bare PCB can cause solderablitiy issues. Lotion transfered after assembly can cause dirt to stick to the assembly also causing contamination issues. Lotion also will not allow conformal coatings to adhere to the surface. If lotion is desired, latex gloves are required.

This is my personnal view. Best regards, cal

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Ivan R

#19048

Hand Lotions | 4 March, 2002

Hello Joshua , In our place we do use a lot of lotion , but it has to be ESD , as you know . We do buy it from TechSpray , you can look in they web page . And we don`t have to worry about using gloves as this cream is very good I hope i can be a hlep Bye for now Ivan

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#19052

Hand Lotions | 4 March, 2002

Let me expand on Cal's comments.

Recommended??? What people recommend depends on whom you ask and what is their motivation. Me??? There is no hand lotion recommended for use in electronics manufacture.

Brian Ellis [a respected author on cleaning, bon vivant, and ex-SMTnter] once said �I recommend that hands be washed thoroughly and rinsed even more thoroughly with NO hand lotion before entering the assembly area.

�Here is a typical formulation of a hand lotion [taken off the bottle label of a well known make]: * Aqua (water) * Paraffinum liquidum (mineral oil) * Propylene glycol (hygroscopic surfactant) * Propylene glycol stearate (hygroscopic and ionic ester) * Cetearyl alcohol * Stearic acid (ionic carboxylic acid) * Parfum (fragrance) * Triethanolamine (ionic saponifier) * PEG30 (polyethylene glycol, hygroscopic) * Lanolin (animal fat) * Methylparaben (goodness knows! It�s a food-grade preservative that protects against yeast and mold.) * Propylparaben (goodness knows! It�s a food-grade preservative that protects against yeast and mold.) * Sodium lauryl sulfate (ionic surfactant - hygroscopic) * PEG75/lanolin blend (see PEG30 and lanolin) * P-chloro-M-cresol-BHT (whatever that may be) * Colours

�Which of these products would you like to see on your assemblies?"

Consider avoiding allowing a specific �safe� lotion, because: * Operators will prefer and use their own lotion. * Operators will not appreciate the subtleties that you used in selecting the proper lotion. * There is no way you can prevent them from using their choice. * We�ve talked to people who have had minor skin reactions to some of the popular �safe� lotions.

As for so-called anti-static lotions, this is a sales gimmick that means that they have an extra dose of hygroscopic surfactants [synthetic detergents are made from petrochemicals], which is one of the last things you wish on an assembly, because often these surfactants are a sodium salt. Basically, it attracts moisture from the air to make the skin more conductive. So, if you wish to respect the electrical integrity of your assemblies: NO HAND CREAMS.

Continuing, the silicones in some hand lotions make soldering and conformal coating very difficult.

Expanding on BE�s point, I recommend that people wash their hands thoroughly and rinsed even more thoroughly both when leaving and when returning to the assembly area.

Finally, recognize that, if you don�t provide hand lotion, people are going to want to use hand lotion. That desire is going to force you to either: * Enforce a �No Lotion� policy � OR * Choose a lotion with the least undesirable impact on your product. [If you are a contractor, you probably have no choice on this one.]

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Steven

#19054

Hand Lotions | 4 March, 2002

I have documentation from many companies on a hand lotion that passes all of the critical tests required in handling of PCB's. If you wish I could copy or have the manufacturer send this information your way. Steve

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Joshua Brown

#19062

Hand Lotions | 5 March, 2002

Hey Steve,

I would like a copy of the documentation you spoke of. You can email me a copy or send it by mail. My address is 7545 Rockville road Indianapolis Indiana 46214. My email is brown@nacc-mallory.com . Thanks for your help.

Joshua Brown

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ivan

#19103

Hand Lotions | 8 March, 2002

Hi Steven ,, can you please e-mail the document about cream ,at irojas@aimtronics.com ,I will be more than appreciated . And for Dave F ,,,, Thank you for the information that it make me think twice

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#19105

Hand Lotions | 8 March, 2002

Steven, I would like to review the documents as well as I have just recently approached this issue within our facility similar to Dave's point of view(referencing conformal coating).

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#19204

Hand Lotions | 20 March, 2002

I understand your point, and generally agree with you about no lotions in the production area. My question for you and the others is what to do with the person whose skin is so dry it does not make good contact with their ESD wristband?

I do not like the idea of using lotion on hands, but have seen operators whose skin was so dry they could not pass a wriststrap test in Florida in the summer. We tried one of the ESD lotions, and it worked for her, but back then everything was solvent cleaned.

What is every one doing now for operators with dry skin that fail the ESD wriststrap test?

Mike

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#19344

Hand Lotions | 1 April, 2002

HI Steve

I would like a copy of this hand lotion specs too.

thanks

Caz

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Tony

#19356

Hand Lotions | 1 April, 2002

It seems that a lot of people (myself included) would like a copy of that. If you would send it to me ( tonyb@revelationindustries.com ) I would be willing to post it on my server and provide a link for all who would like to download it.

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