Do you keep music or tax files on compact discs you bought at a big box store? Well any money you saved by buying cheap CDs could be lost in a hurry. There are some reports that cheap CDs only last two years or so. Cutting corners on materials’ quality exponentially increases the potential for damage from poor handling or storage practices. You have a couple options: 1) Buy high-quality CDs and be careful when handling or 2) Practice extremely careful storage and handling with special technology.
One way to protected CDs is to pay a quarter for a special plastic sleeve developed by Bell Labs. The sleeve features a semiconductive plastic film or sheet. The base polymer is typically polyethylene or polyester that is chemically reacted with conductive copper and other ingredients to form a covalently bonded, homogeneous structure. If someone walks on a carpet and then touches a CD, they can discharge electricity that can locally oxidize a region of the aluminum layer embedded in the CD. The oxidized aluminum will no longer reflect a CD drive’s laser light properly, so all data recorded in the affected area ceases to be readable. Bell Labs licensed the idea to a company called Intercept Technology.
Several of the new and noteworthy 3D printers in this slideshow are breaking some boundaries in build volume, new metals printing techniques, or working with high-profile development partners to ensure very high-quality parts and controls.
United Launch Alliance will fly 3D-printed flight hardeware parts on its rockets starting next year with the Atlas V. The company's Vulcan next-gen launch vehicle will have more than 100 production parts made with 3D printing. The main driver? Parts consolidation and 57% lower production costs.
A new report from the National Institute of Standards and Technology (NIST) makes a start on developing control schemes, process measurements, and modeling and simulation methods for powder bed fusion additive manufacturing.
Although bio-based polymers face challenges from petroleum-based polymers, in certain markets they can displace the petro-based incumbents. Here are six new bio-based and renewable plastics for a variety of applications.
BASF has developed tools and initiatives to help engineers use more of its renewable materials in their designs, more effectively, as well as to build parts using them with more predictable performance.
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.