Please send this back to the person concerned about SR coat contaminating 
nearby soldering processes:

We've been spraying SR coating in a Nordson Select Coat machine for a couple 
of years, and while we don't exhibit silicone buildup on nearby work 
surfaces, we do have slick floors in the area around the machine, probably 
due to walkoff from the machine operators.  Our machine's exhaust is routed 
through a charcoal filter and vented at ceiling height above the machine, so 
it's possible we lose some silicone through the filters into the surrounding 
area, but not much.
Benjamin A Guthrie                     Phone: (219)429-8324
>Mail Stop:15-23  Fax: (219)429-4688     Email: [log in to unmask]
>MESC, 1313 Production Road, Fort Wayne, IN 46808


I sent this up to the server last week, but can't find that I ever got a
>>>"come-back" copy, so here goes again.
>>>
>>>Following is posted for one of our clients:
>>>
>>>"I have a vendor that has installed a closed system conformal coat spray
>>>machine in the middle of an area where surface mount and through hole
>>>processing occurs.   The coating being used is silicone based.  I'm
>>>concerned about silicone contamination of other materials in the work area,
>>>due to unintentional migration (overspray in the atmosphere, fumes/gasses
>>>from curing process, etc.) over time, that could affect the soldering
>>>processes.  Are there any specifications or guidelines for SR coating
>>>controls in a printed circuit board assembly house?  Is this a valid
>>>concern?  Does anyone have a good or bad history of a similar situation?"
>>>
>>>Thanks for inputs anyone has. Jack
>>>
>>>***ALL NEW EMPF PHONE NUMBERS***
>>>
>>>Jack Crawford, HelpLine Coordinator
>>>Electronics Mfg. Productivity Facility
>>>****NEW--317.655.3688
>>>****FAX  317-655-3699
>>>714 N Senate Ave, Suite 100
>>>Indianapolis IN  46202-3112
>>>VISIT OUR HOME PAGE AT: http://www.empf.org
>>>[log in to unmask]
>>>--------------------------------------
>
>
>
>
----------------------------------
Jeffery L. Hempton              Phone: (219) 429-7335   Fax: (219) 429-4688
Boardshop Manufacturing Engineer			Mail Stop: 25-31
Hughes Defense Communications                           
1010 Production Road, Fort Wayne, IN 46808-4106
Email: [log in to unmask]

"Those who dream by day are cognizant of many things which escape those who
dream only by night"    - -Edgar Allen Poe

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