Rich was curious about printing with polycarbonate (PC), but couldn’t find any definitive answers to his questions online. So he bought a roll of 1.6mm PC filament and started experimenting, and his reports are fairly glowing. PC melts hotter than ABS or PLA, is more rigid, and comes out of the printer cloudy, which some have suggested may be due to atmospheric moisture.
As I wrote about a month ago, one of the many unusual phenomena Ben Krasnow has produced in his garage is supercritical CO2. As you may recall, Ben machined a custom acrylic pressure vessel so he could get (and give) a good look at a state of matter that most of us have little experience of. Since then Ben has inadvertently had a chance to observe another extremely unusual effect: the carbonation of solid acrylic.
Recently, I posted about German firm Serrox Technischer Handel’s video showing an interesting alternative to the basic slab-joint method for building an acrylic box. Their technique, which involves cutting 90-degree V-grooves almost all the way through the plastic, has much to recommend it over the slab-joint method, with the exception that they use a very expensive custom V-shaped sawblade to cut the grooves. I wondered, at the time, whether it might not work just or almost as well with a cheap 90-degree V-groove router bit, and with some encouragement from Angus Hines, I decided to try it, myself.
UK educational supply center centre Mindsets online sells variously-sized 3mm thick sample sheets of Eastman’s Spectar copolyester at not-completely-outlandish prices. Spectar supposedly looks and handles much like acrylic, but with the surprising property that it can be cold-formed without breaking or whitening, and exhibits a memory effect, holding a cold bend until reheated.
Though “plastic” has now largely overcome its “The Graduate”-era connotation of “necessarily cheap, fake, and ephemeral,” it remains the case that plastic objects—especially those manufactured early in the history of plastics technology—present unusual challenges for long-term conservation.
Make: Live episode 17 features 3D modeling and printing and was live from the MakerBot workshop in Brooklyn, NY. Learn about the software and hardware toolchain for realizing your imagination in 3D objects in this archived episode. In the clip above, MakerBot co-founder Bre Pettis talks about exciting developments in their extruder technology and fields 3D printing questions from the audience.
ShapeLock is an amazingly useful polycaprolactone plastic that starts to melt and become moldable at 160ºF. When it cools to room temperature it becomes rigid and tough with qualities similar to nylon. By heating it in water with a microwave or using a heat gun, you can easily hand form it into almost anything.
