Eastman Chemical is introducing at K 2007 a new material it describes as the most important plastic resin developed in many years. Tritan copolyester uses a new monomer (not identified) to provide a higher glass transition temperature (Tg) than traditional copolyesters. The first grade will target polycarbonate applications in housewares where the new material offers superior chemical resistance and hydrolytic stability. Three commercial applications were announced at the show: Camelbak Products, Petaluma, CA, for a re-usable sports water bottle; VitaMix Corp., Olmstead Falls, OH, for a blender container; and Carlisle Food Service Products,Oklahoma City, OK; for a commercial soup bowl. CamelBak and Vita-Mix specified the new resin in part because it contains no bisphenol-A. Tom Pecorini, senior research associate at Eastman, says the new material has comparable shrinkage rates to PC, requiring no changes to the tooling. Another benefit: Tritan has a lower density than PC, boosting yield. Eastman said it plans to extend the grade slate, but gave no details.
A lightweight electric urban concept car designed by several European companies weighs only 992 lb without its battery. It would have weighed 26.7 lb more if its windows were made of glass instead of the specially coated LEXAN polycarbonate resin from SABIC Innovative Plastics.
Skylar Tibbits' team in MIT's Self-Assembly Lab is now 4D printing self-assembling shapes made of programmable carbon composites and custom wood grain. The composites are being used in a sport car airfoil, and the wood grain is beautiful.
The NanoSteel Company has produced high-hardness ferrous metal matrix composite (MMC) parts using a new nanosteel powder in a one-step 3D-printing process. Parts are 99.9% dense, crack-free, and with wear resistance comparable to M2 tool steels.
The company that brought you 3D-printed eyeglasses has launched both an improved clear polymer material for 3D printing optical components and a high-speed, precision, 3D-printing process for making small- and medium-sized batches in a few days.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.