One of the weirder materials developments from the economic slowdown is a shortage of sawdust. Prices are up some 25 percent in the past two years, if you can get it. Sawdust is not normally considered an engineering material, but it’s often used as an additive for plastic compounds that cover steering wheels and dashboards. Demand for wood plastic composites has grown dramatically and is close to a billion pounds this year, mostly for construction applications. Composites are typically close to half wood flour and high-density polyethylene, with a smattering of other additives such as stabilizers and pigments. Wood plastic composites are favored for automotive applications because they have a lower specific gravity than compounds made with other inorganic materials. They also give an “organic” look and are considered environmentally friendly. The new economics, however, surely will slow penetration. The reason is the slowdown in house construction, which is slowing timber operations. The weakness of the US dollar versus the Canadian dollar also is having an impact.
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.
HP has launched its long-heralded Multi Jet Fusion 3D printing technology for commercial-scale end-production, plus an ecosystem to go with it. The package could change the entire industrial market for making end-products with additive manufacturing. At the very least, it will be game-changing.
Nearly all the products in this latest crop of new adhesives target electronic and other components for consumer electronics and automotive assemblies. Some are alternatives to liquid adhesives, others are liquids that cure faster, and several stick well to multiple substrate materials.
Getting different types of spacecraft to Mars may require multiple fuel types. NASA is using 3D printing to try out a rocket engine turbopump design that can handle both liquid methane and liquid hydrogen propellant.
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