3-D companies the graveyard of speculators
Don’t even think about it, and even then, no more than 6 & 1/2 hours
3D Printing is great for R&D, as one can easily and quickly change designs. For mass production......not so much.
For this specific application, mass production will almost undoubtedly be done by something like heated roller embossing of a roll-fed polymer sheet (think of printing a newspaper)