Quote from wikipedia:
The pyrolysis of PTFE is detectable at 200 °C (392 °F), and it evolves
several fluorocarbon gases[12] and a sublimate. Animal studies
indicate that it is unlikely that these products would be generated in
amounts significant to health at temperatures below 250 °C (482
°F),[13] although birds are proven to be much more sensitive to these
decomposition products.[12][14]
While PTFE is stable and nontoxic, it begins to deteriorate after the
temperature of cookware reaches about 260 °C (500 °F), and decomposes
above 350 °C (662 °F).[15] These degradation by-products can be lethal
to birds, and can cause flu-like symptoms in humans.[15]
Meat is usually fried between 200 and 230 °C (392 and 446 °F), and
most oils will start to smoke before a temperature of 260 °C is
reached, but there are at least two cooking oils (refined safflower
oil and avocado oil) that have a higher smoke point than 260 °C. Empty
cookware can also exceed this temperature upon heating.
End quote
So unless you are chicken you should be fine. ;-)
I would be much more concerned about the flux fumes from solder paste.
Reflow soldering should be done with good ventilation.
Also, not all non stick coating is PTFE (that might be good or bad).
ST
On Fri, Sep 2, 2011 at 10:58 PM, Bob Headrick <bobh@...> wrote:
> I would worry about this particular model. It says it has a non-stick coating, which would typically be Teflon. Teflon decomposes into toxic by-products at ~ 200C. The page here: http://www.fluoridealert.org/pesticides/teflon.decomposition.prod.htm says:
>
> “Overheating of PTFE generates fumes of highly toxic PFIB and poses a serious health hazard to the human respiratory tract. PFIB is approximately ten times as toxic as phosgene [2]. Inhalation of this gas can cause pulmonary edema, which can lead to death.”
>
> I would not use this for reflow soldering, especially if it required bypassing or modifying the thermostat.
>
> - Bob Headrick
>
>
>
>
>
> On Fri, Sep 2, 2011 at 5:55 PM, Peter Harrison
> <peter.harrison@... <mailto:peter.harrison%40helicron.net> > wrote:
>> Hi
>>
>> I was looking around a local store and came across a tabletop pizza oven:
>>
>> http://www.argos.co.uk/static/Product/partNumber/9331897/Trail/searchtext%3EPIZZA.htm
>>
>> They are reasonably cheap and should have room inside for about 6" diameter. Has anyone tried reflow with one of these? I guess that, so long as it can get up to about 240 deg C inside it stands a chance but I am not so sure it could get that hot. Certainly, I am not sure enough to try buying one just to see.
>>
>> It would be nice and compact though. Maybe replace the thermostat…
>>
>>
>>
>> [Non-text portions of this message have been removed]
>>
>>
>>
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>>
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>>
>>
>>
>>
>
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