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Looking for heat-resistant films

Looking for heat-resistant films

Looking for heat-resistant films

(OP)
Hi,

I'm looking for commercially available films with following properties:
1. Heat-resistant up to 160 oC
2. Surface roughness rms below 1 nm
3. Stand-alone
4. 0.1 ~0.5 mm thick

I've tried some Kapton films but the flatness is not desirable. Can anyone suggest other. Thanks.

simonwei

RE: Looking for heat-resistant films

What are you inferring when you state "stand-alone"?

What is the size you need?

RE: Looking for heat-resistant films

(OP)
Hi, unclesyd:

By "stand-alone" I mean the film is independent of a substrate. The size of the film is 1 in. by 1 in..
Thanks.

simonwei

RE: Looking for heat-resistant films

More questions.
Are you talking about an organic film?
Transparent to what, visible, UV, IR?
Environment?

RE: Looking for heat-resistant films

I'm wondering if you can get glass cover slips that big.

 

Mike Halloran
Pembroke Pines, FL, USA

RE: Looking for heat-resistant films

(OP)
Sorry I forgot to mention flexibility is desirable.

simonwei

RE: Looking for heat-resistant films

You can surely find polycarbonate sheet at the upper end of your thickness range.

 

Mike Halloran
Pembroke Pines, FL, USA

RE: Looking for heat-resistant films

(OP)
Do flexibility and flatness defy each other inherently? Or is it more about a matter of how the film is processed? Commercially available Kapton films and PET transparencies are flexible and "look" flat, and I'm wondering if a better processing can bring roughness down to 1 nm rms?
Thanks.

simonwei

RE: Looking for heat-resistant films

Intrinsically, anything that bends is unlike to return to its "flat" state.  That implies that you are actually asking for something else; you say they "look flat", but what exactly do you require, is it "smoothness," as implied by your numerical requirement?  Bear in mind that 1nm rms is substantially "flatter" than most flat glass mirrors.

Smoothness requires polishing, either of the forming surface or the finished surface.  You can presumably take reinforced Kapton and subject it to polishing.  You might want to consult with some optics houses.

TTFN

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RE: Looking for heat-resistant films

I would look at the nylons especially the 6/12 variety, Bake-in a Bag, I believe they make them in a 6 mil thickness. i also looked at window film, 8 mil impact, but they fall out as far as temperature resistance is concerned.

The DSM site offers a new material Stanyl that has excellant high temperature properties.

http://www.dsm.com/le/en_US/stanyl/html/gi_apps_film.htm?DCSext.src=search

Solvay has any number of products that could be used.

http://www.solvayadvancedpolymers.com/products/0,,304-2-0,00.htm?WT.mc_id=SAP%20Google&;WT.srch=1
 

RE: Looking for heat-resistant films

PC will be quite soft at 160 C as will PET or PBT.

Some nylons will withstand that

Many exotics like sulphones and PEEK and polyimide and polyetherimide will take the heat but are expensive and of limited availability

We still do not know load, time at temperature, other factors in the environment, if it requires transparency or dimensional stability.

The surface finish required is a tough call.

Regards
Pat
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