Bev,
OK, I stand corrected. Here is the scenario; we use Citrex to clean up our
polyurethane spray equipment. We removed some fittings that had Teflon tape
on the threads and after a couple of days we noticed that all the tape was
gone and there was a white residue in the bottom of the cup. Now that you
have raised the question I took a good look at the tape and it is "Ribbon
Dope", thread sealant form Permacel, no mention of Teflon. I guess we just
assumed that the tape was Teflon.
As far as Citrex goes it does work very well. It comes from Inland
Technology Crop. in Tacoma, Washington, 800-552-3100. The hazardous
ingredients from the MSDS are Methylpyrrolidone, D-Limonene and Glycol
Ether PNB.
Hope this clears things up a little.
KennyB
At 08:23 AM 8/13/99 -0400, Bev Christian wrote:
>Kenny,
>A terpene based material dissolving Teflon? Either there is something else
>in that material that you should be scared of or someone pulled a fast one
>on you with that tape! Personally I don't know of anything that will
>dissolve a pure, fully polymerized PTFE, short of maybe boiling aqua regia
>or molten sodium hydroxide. I will see if I can get a copy of the MSDS for
>Citrex from our local EHS guy.
>
>regards,
>Bev Christian
>Nortel Networks
>
>> -----Original Message-----
>> From: Graham Naisbitt [SMTP:[log in to unmask]]
>> Sent: Friday, August 13, 1999 7:09 AM
>> To: [log in to unmask]
>> Subject: Re: [TN] SILICONE CONTAMINATION & Cooked Latex Mask
>>
>> Hey Kenny,
>>
>> This one should be passed to Jim Marsico for his SILICONE problem. If it
>> dissolved PTFE it should get rid of the silicone.
>>
>> Regards,
>> Graham Naisbitt
>>
>> [log in to unmask]
>>
>> WEB: http://www.concoat.co.uk
>>
>> CONCOAT Ltd
>> Alasan House, Albany Park
>> CAMBERLEY GU15 2PL UK
>>
>> Tel: +44 (0) 1276 691100 Fax: +44 (0) 1276 691227
>> ----- Original Message -----
>> From: Kenny Bloomquist <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Thursday, August 12, 1999 6:00 PM
>> Subject: Re: [TN] Cooked Latex Mask
>>
>>
>> > Graham,
>> >
>> > I don't know if it will work but we use a product called Citrex, a
>> citrus
>> > based material, for a lot of different stripping applications. One
>> > application is removing dried UR conformal coating from things like
>> spray
>> > guns. I recently soaked some fittings that had teflon tape left on them
>> and
>> > it disolved the teflon tape. May be worth a shot but I would keep it
>> away
>> > from the board material.
>> >
>> > Ken Bloomquist
>> > Sr. Principal Process Engineer
>> > PRIMEX Aerospace Company
>> > P.O. Box 97009
>> > Redmond, WA 98073-9709
>> > http://www.primextech.com
>> >
>> > Ph: 425-885-5000
>> > FAX: 425-882-5786
>> > [log in to unmask]
>> >
>> > Northcon/2000, Board Member
>> > http://www.northcon.org
>> >
>> > Electronics Manufacturers Association (EMA), Vice President
>> > http://www.ema-wa.org
>> >
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