Teflon Coatings on Breadmakers

[Dennis]

Following discussion with a customer yesterday I did a little internet research on the properties of teflon.

I wonder how many Coretto users remove any teflon coating *before* using it for home roasting?

Quote from Mal in another thread:
"Consecutive coffee roasts build up a layer of burnt on oils over time and render the Teflon coating all but useless as far as non-stick properties are concerned. Also, the beans do wear the Teflon coating away too so eventually youll have "bald" patches appearing all around the walls and the base of the bread-pan. Weve got a couple of spare pans so one is dedicated solely for coffee-roasting and the others for making dough, etc.....

Mal."

If the coating comes off over time then it would stand to reason that it ends up on the beans, and as it burns off you breathe in the fumes.

So it might be a healthy exercise to remove any teflon as part of setting up a Coretto?

[Thundergod]

Re: Teflon Coatings on Breadmakers

I was wondering whether or not a corretto would reach a temperature that could burn the teflon.

Though DuPont is quick to point out the safety of Teflon and to distance it from the chemical PFOA, studies show Teflon cookware releases PFOA when heated to 680°F (360°C). This temperature can be reached within a few minutes if, for example, a forgotten pan is left empty preheating on a burner. DuPont acknowledges this, but points out that this is incorrect use of the cookware.

My heatgun goes to 600 (stated) but when roasting, the beans reach about 205.

Im doubting the pan would therefore reach a dangerous temperature level.

However, the teflon does wear off and where it goes is a good question.
At best, it would blow away with the chaff; at worst.....?



EDIT: I just found this:

According to peer-reviewed studies as reported by the EWG, nonstick cookware, including Teflon, begins outgassing particles at 396°F (202.2°C).

[grimsby]

Re: Teflon Coatings on Breadmakers

The teflon wears off frying pans too!
Anyone worried about eating food cooked in a teflon lined frying pan?

[A_M]

Re: Teflon Coatings on Breadmakers

The teflon wears off frying pans too!
Anyone worried about eating food cooked in a teflon lined frying pan?

Many are and it was and has been the subject of some interesting reports as to causing all sorts of health problems..

Then again, like many things, it is often only years after we use things on a regular basis that it is found to be bad for you ie. Smoking ;D

On that note: time for a lung lollie and some RO water

[Thundergod]

Re: Teflon Coatings on Breadmakers

I dont use aluminium cooking utensils any more.
Back in the 70s they were the in thing.

Also back then my dad was a builder and I used to help him cut and build with fibro then play with the offcuts.

Maybe Im yet to become a victim of asbestosis or forget that I used to do those things (when the alzheimers kick in).

[Dimal]

Re: Teflon Coatings on Breadmakers

I checked the temperature of the sides of the pan (outside) in our BM and the max temperature recorded was just over 180C, even with a bean-mass temperature approaching 220C.

There was a LOT of discussion about the pros/cons of teflon coated bread-pans/paddles not long after Belinda posted her original Corretto thread and I think most, if not all issues were covered back then. Anyway, I guess if anyone has concerns about the coating, it wouldnt be a huge deal to wire-brush it all off either manually or with a rotary tool of some kind but your point is well taken Dennis....

Mal.

[JavaB]

Re: Teflon Coatings on Breadmakers

Yep, did similar tests way back...

The pan acts as a "heat sink" and doesnt reach the critical temperature even after a long roast... so no need to remove the teflon there.

But the paddle is directly in the blast from the HG.... and has nowhere to sink the heat.... so can get well into.... and above the critical temp for teflon....

So off with the paddle.... a stainless steel scourer.... and a shiney bare aluminium paddle.... problem solved!

[damian1]

Re: Teflon Coatings on Breadmakers

Anyone worried about eating food cooked in a teflon lined frying pan?

yep - me! occasionally I dont mind, but I would not buy them.

[Dennis]

Re: Teflon Coatings on Breadmakers

Thanks guys. Was just curious and thought it couldnt hurt to get rid of it beforehand rather than take what might be a risk.

As for teflon coated frypans - give me a good old cast iron one any day!

[grimsby]

Re: Teflon Coatings on Breadmakers

I read the discussion about the teflon coating before I set up my corretto.
I removed the teflon from the paddle but found it easier to do using wet and dry sandpaper (used wet) than using stainless steel wool as JavaB suggested. I also replaced the PTFE seal with a bronze bush turned up specially on the lathe. I thought about removing the teflon lining from the bin but decided that it was too much like hard work and the view then (and now) was that it didnt get hot enough to be a worry.
However it does get worn off by the rotation of the beans and it has to go somewhere. The photo is of my BM bin after a year of roasting.[img][/img]

[grimsby]

Re: Teflon Coatings on Breadmakers

Decided to see how hard it was to remove the teflon lining from the bin.
Took most of the afternoon and the skin off the top of a couple of fingers!
Anyway now have a teflon free corretto.
Maybe the only one in captivity!
And I was going to mention the bit about aluminium but TG beat me too it.
Reckon its the lesser of two evils.
Now if only they made the BM bins out of stainless steel.

Cheers,
Alan[img][/img]

[Thundergod]

Re: Teflon Coatings on Breadmakers

My pan has lost some teflon at the high points (like those bit in the middle of the two walls).
The sides facing the direction the beans come from get the wear.

I took the teflon off the paddle easily enough with a wire brush on drill.

I might take to the pan with the same brush and finish it off by hand.
Better to be safe as Dennis said.
Besides, it will look nicer.

[Dimal]

Re: Teflon Coatings on Breadmakers

LOL,

Ive got worse things to worry about than a rare bout of "PTFE Flu" so Ill just be letting mine wear off as much as it wants to. As it happens, the bread-pans for our BM are a type of stainless-steel, not totally non-magnetic but certainly of a good enough quality so as to prevent corrosion. Not a speck of rust anywhere despite very frequent use in both roles since about 97 or 98.

Mal.

[luca]

Re: Teflon Coatings on Breadmakers

To remove the teflon easily, couldnt you just put something abrasive in the BM and let er rip? Like pebbles from your driveway?

[Dimal]

Re: Teflon Coatings on Breadmakers

To remove the teflon easily, couldnt you just put something abrasive in the BM and let er rip?  Like pebbles from your driveway?

It might work Luca but probably with quite variable results and I think the load on the stirrer motor would be in excess of its design.

I dont think its all that difficult to get off though Luca, via wire brush, steel wool or some kind of rotary tool brush. Not that Ive really got the inclination but the next time I get the roast gear out of the cupboard, Ill grab a couple of abrasive thingies of one sort or another and see for myself then report back....

Mal.