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.
Two new technologies from Stratasys, created in partnership with Boeing, Ford, and Siemens, will bring accurate, repeatable manufacturing of very large thermoplastic end products, and much bigger composite parts, onto the factory floor for industries including automotive and aerospace.
These new 3D-printing technologies and printers include some that are truly boundary-breaking: a sophisticated new sub-$10,000, 10-plus materials bioprinter, the first industrial-strength silicone 3D-printing service, and a clever twist on 3D printing and thermoforming for making high-quality realistic models.
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