Ideas for new filaments have been brewing at ArmaniCreations for almost a month, since the realization that 3D printers could make fully functional, commercially competitive products in the future, but that it would require a bundle of new materials. To date, the majority of sellers only carry ABS and PLA plastics. A few resellers carry PVA (a dissolvable support material) and even fewer carry polycarbonate (PC) or polyethylene (HDPE) because of printing challenges.
So, Michael posted on the reprap forums to see what the reception would be like for some new materials, what other materials are desired, etc. Surprisingly, conductive filament and magnetic filament, which could be used to print objects like functional motors or speakers were not even mentioned after the initial post. Reprappers were mainly interested in printing rubbery materials, heavy-weighted polymers, and alternative materials like Delrin.
For each of these materials, there are obvious technical constraints, and safety considerations. All of the filaments proposed by ArmaniCreations assume a 1.75 mm filament and melting temperature typically between 180 C and 250 C. This is specifically aimed at the filament deposition modeling printers, where it is possible to simply exchange one polymer for another by changing filaments or using a multi-extruder head. The development of new materials has extremely exciting prospects for RepRap.
By contrast, printers like the B9Creator can only print one or more light-cured polymers. While it is possible to light cure rubber, generally these materials are brittle, have little resistance to the elements, and can not be used as functional parts in a final product. More generally, they are best suited to 3D printed models. On the other hand, their resolution is state of the art, and you can not easily see layering lines with their prints.