Foaming PTFE Foaming PTFE atari89 (Materials) (OP) 24 Jun 15 09:45 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 Pud (Mechanical) 24 Jun 15 11:17 Can't be that difficult. Google for foamed PTFE gets lots of hits. Here's one: http://www.interplastinc.com/temp16.htm Cheers H www.tynevalleyplastics.co.uk It's ok to soar like an eagle, but weasels don't get sucked into jet engines. RE: Foaming PTFE atari89 (Materials) (OP) 24 Jun 15 11:46 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 Demon3 (Materials) 24 Jun 15 12:20 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 atari89 (Materials) (OP) 24 Jun 15 12:41 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 HDS (Mechanical) 22 Oct 15 19:20 Porex sells PTFE with voids in sheet form. Why make it yourself when you can buy it?