Expanded PTFE board and the difference between ordinary PTFE board and different

Update:08 Mar 2018

Expanded PTFE material theoretical limit of use tempera […]

Expanded PTFE material theoretical limit of use temperature of -218 +260, the actual safe use of temperature is only about half.
Expanded PTFE that is raw material, the material is raw material.
Ordinary polytetrafluoroethylene is more than 327 degrees after sintering cooked material.
Expanded PTFE material close to or beyond the high temperature limit temperature will become a cooked ordinary PTFE material, and the size of a substantial reduction, you can use the lighter to burn to be a test.
If you approach or over-limit the temperature, temporarily do not know, the size should also be significantly reduced.