I'm looking for a polymer foil with the following criteria:
1. It shoud be less than 0,1 mm thick
2. It should be cheap to manufacture
3. When the foil is bent let's say 180 degrees making a sharp edge, the foil will crack immediately and thin hole has been made. So when the foil experiences bends without a 180 (or 120 degrees, whatever) degree sharp edge, nothing will happen and it will stay ductile.
Does such a polymer exist?
Regards, Lucas Jensen