Polymer Seal
Polymer Seal
(OP)
Hello All,
We have a UHMW seal that is currently failing when subjected to testing. When exposed to -40F the seal is not reliable. The seal works fine at higher temperatures (200F). I ran TMA on the new versus used seal and found the CTE to be about 30 points lower on the used seal. I am attributing this to material degradation from the thermal cycling, however would like some input if this would be the main cause. Additionally, open to recommendations on other materials to use. We are looking at carbon filled teflon also and saw worse sealing. The seal is part of a pump. We have checked dimensions and surface finish on mating parts. Thanks for your time!
We have a UHMW seal that is currently failing when subjected to testing. When exposed to -40F the seal is not reliable. The seal works fine at higher temperatures (200F). I ran TMA on the new versus used seal and found the CTE to be about 30 points lower on the used seal. I am attributing this to material degradation from the thermal cycling, however would like some input if this would be the main cause. Additionally, open to recommendations on other materials to use. We are looking at carbon filled teflon also and saw worse sealing. The seal is part of a pump. We have checked dimensions and surface finish on mating parts. Thanks for your time!





RE: Polymer Seal
https://www.basf.com/group/corporate/en/literature...
and Irganox 1330
http://www.specialchem4polymers.com/tds/irganox-13...
Chris DeArmitt PhD
President - Phantom Plastics LLC
Consulting, ideas and training on plastic materials
www.phantomplastics.com
RE: Polymer Seal
Rick Fischer
Principal Engineer
Argonne National Laboratory
RE: Polymer Seal