. "Examples of useful polymer materials include, but are not limited to, polyolefins including polyethylene and polypropylene, polyesters such as polyethyleneterephthalate (PET) and polybutylene terephthalate (PBT), polyurethanes, acrylics, polypeptides, polyethers, polyamides, fluoropolymers such as expanded polytetrafluoroethylene, and so on and so forth." . . . . . .