I have been writing about engineering plastics for more than 20 years, and I never had heard about any relationship between crystallinity and shish-kebabs. That is, until I saw the May 18 issue of Science magazine. It contains an article indicating that polyolefins crystallize into shish-kebab shapes (I couldn’t make this stuff up).More importantly, the researchers who wrote the article say they know how to manipulate the shape of these “shish-kebabs” so that the polymer structure becomes much stronger. "Our discovery is pertinent to the relatively strong and stiff plastics," says Julia Kornfield, chemical engineering professor at Caltech. "For example, it will allow manufacturers to make polymers for complex and beautifully shaped body panels with equal or better quality than currently available—and cheaper and faster." The lead author of the paper is Shuichi Kimata, a former postdoctoral researcher in Kornfield's Caltech lab. He linked Kornfield's group at Caltech with Yoshinobu Nozue's group at Sumitomo and collaborators at the University of Tokyo. The title of the Science paper is "Molecular Basis of the Shish-Kebab Morphology in Polymer Crystallization." What’s the path to commercialization? What’s the timetable? Or is this just an academic tease? Stay tuned.
Major changes are happening in the world of 3D printing and additive manufacturing materials, machines, and software. If the industry -- and the design engineers and OEMs it serves -- are to grow, all three areas must become much more tightly integrated.
The FDA has just released draft guidelines for using 3D printing in the design, development, and manufacture of regulated medical products. Although the recommendations are non-binding, they do set some much-needed parameters.
HP's industry-changing 3D printing announcement for commercial-scale end-production wasn't the only news of note at RAPID 2016 this week. Here are six more game-changing software and hardware news items, plus some videos explaining HP's technology.
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