On the very outside chance someone here has some experience, I thought it can't hurt to ask.
What do you know about the tear properties of a TPE/TPU or even silicone?
This is the problem/idea. I have a bottle of liquid. In a simple plunging motion, I want to force a "stick" through a septum so the "stick" immerses into the liquid. The reason for an elastomer instead of simple foil seal is I want the septum to squeegee the excess liquid off of the "stick" when it is pulled out of the bottle.
My idea is to have a TPE/TPU, silicone with a 0.040-0.080 wall thickness and kiss cut an "X" let's say 0.020-0.040 deep. When you push the "stick" through, the material tears through the "X" only and use the "flaps" as the squeegee. I suppose I could also mold in the cut marks as an alternative.
This is probably more of a question for my material supplier, but does any of this stuff tear "well"? Playing with my Santoprene samples, the stuff really stretches before tearing. I'd have to put a lot of force on the "stick" for it to break through. When it does break through, it is a fast jarring motion. Not customer friendly at all.