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Foaming PTFE

Foaming PTFE

(OP)
Hello, I was wondering if there was a proper way to foam PTFE or to create air voids in PTFE?
I found no publications on the topic yet. What do you think?

RE: Foaming PTFE

(OP)
Thanks for the reply. I found many commercial products like these, but I'm interested in foaming it myself.
E.g. I have a PTFE film and I want to create voids into that film.
Regards

RE: Foaming PTFE

Foamed PTFE is popular as a dielectric for electrical cables needing very low loss and yes the process is commercial. However, it is not easy to do yourself. PTFE is processed using a RAM extruder (because it doesn't melt) whereby powder is compressed in the presence of a plasticizer and fused together. If you are running that process you could foam by adding a foaming agent to create bubbles in the extrusion process. If you have a premade film then it's going to be hard or impossible. Better to buy a foamed PTFE sheet.

A Google search for foam PTFE sheet gives hits like this: http://www.interplastinc.com/temp16.htm

Chris DeArmitt PhD
President - Phantom Plastics LLC

Trusted adviser to leading companies around the world
www.phantomplastics.com

RE: Foaming PTFE

(OP)
Then I have to reconsider, because we don't own a RAM extruder.
PTFE is indeed a tough one. Soluble in no organic solvent.
Thanks for the fast replies.

RE: Foaming PTFE

Porex sells PTFE with voids in sheet form. Why make it yourself when you can buy it?

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