We all want to trust “the system” when it comes to issues such as potentially toxic chemicals that could affect our health. But new reports about polycarbonate baby bottles are disturbing. Research from the federal National Toxicology Program is said to raise ‘’some concern” about bisphenol A potentially leaching from polycarbonate baby bottles and other products. Rats exposed to the chemical showed disturbing changes, including some linked to cancer. Canadian health officials say bisphenol A may endanger humans and any may ban the substance from baby bottles. Polycarbonate producers such as Sabic Innovative Plastics are referring questions to Dr. Steven Hentges, a polycarbonate expert at the American Chemistry Council. The ACC has released a very guarded statement, which says that the new studies confirm their position that exposure to BPA is negligible. Dr. Hentges calls on the U.S. government to conduct more studies to affirm the safety of BPA. I wonder what Dr. Hentges is telling his family members about use of polycarbonate baby bottles, which are typically exposed to high heat in a dishwasher? I’ll bet he’s telling them to take no chances. Use safer BPA-free alternatives. Why take any chances? There are limits (big limits) to how far we should go to protect our chemical industry.
It’s not clear to what extent there are also health concerns about epoxy resins, which are typically made with bisphenol A and widely used as a coating in food n beverage cans.
HP revealed more of its 3D printing plans in a recent webinar. Senior vice president of inkjet and graphics solution business Stephen Nigro spoke about how the technology works and expanded on HP's vision of open collaboration to commercialize its Multi Jet Fusion 3D printing technology for end-production, and open collaboration on new materials. He also said HP will create software to help users decide when to use Multi Jet Fusion versus conventional subtractive manufacturing.
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.
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