High Temperature Polymer that is FDA/USDA Approve

Question

High Temperature Polymer that is FDA/USDA Approve

JOEYRDC (Mechanical)

(OP)

8 Sep 17 04:45

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 (Mechanical) · Answer 1 · 2017-09-08 12:31:32

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 (Materials) · Answer 2 · 2017-09-10 14:48:23

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
www.phantomplastics.com

IRstuff (Aerospace) · Answer 3 · 2017-09-10 17:33:34

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: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers Entire Forum list http://www.eng-tips.com/forumlist.cfm

moltenmetal (Chemical) · Answer 4 · 2017-09-11 11:44:12

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 (Mechanical) · Answer 5 · 2017-09-15 00:51:23

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 (Materials) · Answer 6 · 2017-09-25 17:07:15

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
www.phantomplastics.com

Come Join Us!

Posting Guidelines

High Temperature Polymer that is FDA/USDA Approve