DuPont officially launched a fully commercialized portfolio of biobased plastics at the National Plastics Exposition in Chicago that is clearly the broadest and most ambitious in the industry. Biobased resins that have been on the market for the past four or five years had limited scope. They were aimed at biodegradable packaging applications, and putting biobased polymers into the engineering arena was a far tougher challenge. “Our goal from the very beginning was to develop materials that offered equal or superior performance to the competitive materials,” Marsha A. Craig, DuPont’s global business manager for renewably sourced materials, told Design News in an interview.The three families shown by DuPont at the NPE are Sorona EP PTT-type polyesters, Hytrel RS thermoplastic elastomer, and Zytel RS thermoplastics long chain nylons (6,10 and 10,10).
The Sorona family contains 37 percent corn-based feedstock and is offered in 15 and 30 percent glass filled grades. ”We will also be selling unreinforced , toughened and other grades,” says Craig. DuPont has not yet announced any commercial applications for Sorona EP, but Craig says several customers are conducting tests with the material. A sample glass-filled Sorona EP part on display at the DuPont booth (which had a distinctly earth-friendly theme) had an excellent surface finish, one of the attributes of the renewably sourced blend. Prices for the compounds will be in the $2-$3 per pound range, and will reflect a premium for their superior attributes. Renewable content varies from 20 to 65 percent depending on the hardness grade.
The Hytrel RS is a drop-in replacement for existing Hytrels, and will be priced at a 10 percent premium, reflecting higher costs for the sustainable component, which is produced from nonfood biomass. The exact biomass is currently being kept confidential by DuPont. Target customers are seeking materials with a renewably sourced component. The first announced application is a collar for a Salomon ski boot. The third family, Zytel RS, is based on sebacic acid made from castor oil. Renewable content varies from 60 to 100 percent, depending on the grade.
A new service lets engineers and orthopedic surgeons design and 3D print highly accurate, patient-specific, orthopedic medical implants made of metal -- without owning a 3D printer. Using free, downloadable software, users can import ASCII and binary .STL files, design the implant, and send an encrypted design file to a third-party manufacturer.
A recent report sponsored by the American Chemistry Council (ACC) focuses on emerging gasification technologies for converting waste into energy and fuel on a large scale and saving it from the landfill. Some of that waste includes non-recycled plastic.
Capping a 30-year quest, GE Aviation has broken ground on the first high-volume factory for producing commercial jet engine components from ceramic matrix composites. The plant will produce high-pressure turbine shrouds for the LEAP Turbofan engine.
Seismic shifts in 3D printing materials include an optimization method that reduces the material needed to print an object by 85 percent, research designed to create new, stronger materials, and a new ASTM standard for their mechanical properties.
A recent study finds that 3D printing is both cheaper and greener than traditional factory-based mass manufacturing and distribution. At least, it's true for making consumer plastic products on open-source, low-cost RepRap printers.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.