I need to make PTFE caps on my test tubes. Why PTFE? The test tubes contain industrial solvent mixtures & the rubber caps that came with the test tubes are very, very slowly being dissolved.
I need about a dozen caps. If I were to make it out of solid PTFE, turned on a lathe creating the cap, then it would be expensive. So I'm thinking of having thick cups of PTFE. Then it would be filled by a soft elastomer, creating the cap. Seeing that most PTFE pieces are created by taking PTFE powder & thermoforming it in molds, the production method is expensive even if the cups are lightweight. So I'm thinking "what about vacuum forming?", so I'm here. Can Vacuum forming be used on PTFE?