Epoxy bonding

You should contact the epoxy manufacture and ask for the technical support department. I would try several manufactures. Epoxy comes in so many types that you need to select the right type and surface treatment/cleaning to get the best bond.

You could try this, a method for bonding Polyproplene sheets. Although Tedlar has excellent anti-stick properties, it may not work. Polyproplene has a certain amount of oils on the surface that prevent bonding and must be flashed off. To do this a propane torch is used. It must be applied and moved along the area to be bonded rather quickly to prevent deformation, remember it is just to flash off the oils. Once this is accomplished cyanoacrylate or Super Glue can be used to bond it, but not too much about 1 drop every 3/4 inch. Keep it dry, water is an accelerate for super glue, sometimes handy knowledge. If this doesn't work contact dupont, the maker of Tedlar.

I was chasing down for my own purposes bonding for Tedlar on tedlar.com earlier today.

Evidently tedlar is a 'kissing cousin' to teflon, and has some of the same bonding issues.

There are some PDFs posted there from DuPont on bonding and adhesives for use with tedlar. Tedlar is a polyflourocarbon of some flavor.