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April 2000

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Subject:
From:
Brian Ellis <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Sat, 8 Apr 2000 13:13:47 +0300
Content-Type:
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text/plain (51 lines)
David

You are getting dangerously close to offending me with your publicity.
IMHO, you have stepped over the mark.

There is a fourth supplier of fluids, F2 in England, who have just been
bought out by a consortium of Mitsubishi, an Italian subsidiary of
Mitsubishi and Asahi Glass.

I should like to point out that all these fluids are perfluorocarbons
(PFCs) which are amongst the worst substances known to man for
global-warming emissions (typically 10 000 times worse than CO2). This
means that, if you allow just 1 kg to evaporate, over a given period of
time, this is equivalent to using about 20 tonnes of motor or heating
fuel. Even if the machine itself reduces emissions to a minimum for cost
reasons, they are never zero. In addition, there are drag-out losses on
the assembly and these are always very finite, even with machines with a
vacuum phase after vapour draining in the freeboard. PFCs are
specifically targeted in the Kyoto Protocol and every country must take
them into consideration in their global warming balance sheet. Some
countries have or are about to impose(d) restrictions on their use or
apply fiscal measures.

This is a pity because I like the notion of asymptotic soldering, but I
fear that we shall see a slow demise of PFCs.

Brian

David Suihkonen wrote:

>  Dear Brett, Used vapor phase are occasionally available but your
> timing has to be right. I hear of them from time to time and will look
> around for you. If you are interested in new equipment, check out
> www.rdtechnicalservices.com Keep in mind all vapor phase ovens can use
> fluid manufactured by 3M, Dupont, or Ausimont. Best Regards,David
> Suihkonen

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