High Temperature Polymer that is FDA/USDA Approve

[JOEYRDC]

Hi Fellow Eng-tips people,

I will like to ask your help in the selection of appropriate Plastic material in my latest project
I am doing an Oven-Grill temperature sensor and now looking for any advance plastic material that is capable to sustain 800°F temperature
Does anyone have experience a similar high thermal application?
By the way, does anyone know of PPS and PBI brand that is FDA approved?

Thanks in advance


Joey
Mechanical Design Engineering

 

[rickfischer51]

I think that is well above the temperature capability of any thermoplastic. Maybe a thermoset might work.

Rick Fischer
Principal Engineer
Argonne National Laboratory

 

[Demon3]

Plastics cannot withstand 400°F because the carbon-carbon bonds that hold the polymer together break down at that temperature.

Chris DeArmitt PhD FRSC
President

Plastic materials consultant to the Fortune 100

http://www.phantomplastics.com

 

[IRstuff]

There is a reason why you typically find ceramics in these types of applications.

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

https://www.youtube.com/watch?v=BKorP55Aqvg

faq731-376 forum1529 Entire Forum list

http://www.eng-tips.com/forumlist.cfm

 

[moltenmetal]

Demon3 meant 800 F- there are lots of plastics which can withstand prolonged exposure to 500 F, with some surviving 600 F. But none of them hold together at 800 F for an appreciable period.

 

[JOEYRDC]

Thanks Guys,

I am now inclined on using Ceramic material (alumina)
Any advise what type is recommended for an FDA/USDA approved material?
Also, do you have ideas (filler or additives) on how to strengthen this so as to pass drop test.

 

[Demon3]

Yes, I did mean 400°C. Thanks! BTW the FDA doesn't actually approve such materials. What normally happens is that you get a letter from a lawyer firm saying that for reasons a-z the material is likely safe. Keller and Heckman are the most prevalent choice in that space.

Chris DeArmitt PhD FRSC
President

Plastic materials consultant to the Fortune 100

http://www.phantomplastics.com