The economy is so bad right now that even our trash is worthless. Experts estimate that prices for recycled paper, metal and plastics have dropped 50 to 70 percent, or not even worth the while to ship them across the Pacific to China, which has imported more than 70 percent of the materials used in its recycling industry. Scrap copper peaked at $8,000 a ton in 2007, and it now brings $3,000. Some sources say paper is even down as much as 80 percent.
Recycled American scrap has been sitting in ships in Chinese ports, or scrap yards. Increasingly that recycled material will go into landfills. From a design engineering standpoint, it makes that old claim of designing products that are “recyclable” even less tenable. Even stuff that has had real value, like PET soda bottles, or high-density polyethylene milk bottles, is now struggling to find markets. So what’s happening to plastic car interiors, or engineering materials in washing machines or computers? It’s certainly not part of a tenable, economic recycling stream at least now - if it ever was.
Interviews I had with a great engineering team at a Massachusetts company this week reminded me that we really have to make decisions for ourselves about what makes sense from an environmental point of view. Just saying we specified a bioplastic, for example, doesn’t make it a good environmental choice. Or saying that we used a “recyclable” material doesn’t mean we did a good turn for the environment. We need to consider factors like how much energy did it take to ship those sub assemblies I specified? Would it have been better environmentally to have paid 5 percent more and bought from a local supplier? I’m sure there are a whole series of issues like that. And that kind of thinking is very different from the kind of marketing spin you often hear.
The company that brought you 3D-printed eyeglasses has launched both an improved clear polymer material for 3D printing optical components and a high-speed, precision, 3D-printing process for making small- and medium-sized batches in a few days.
We've found an amazing variety of robot hands & arms in medicine, space, and service robots, as well as R&D and assembly. Some are based on industrial designs modified for speed or dexterity, while others more closely emulate human movements, as well as human size and shape.
To give engineers a better idea of the range of resins and polymers available as alternatives to other materials, this Technology Roundup presents several articles on engineering plastics that can do the job.
The first photos made with a 3D-printed telescope are here and they're not as fuzzy as you might expect. A team from the University of Sheffield beat NASA to the goal. The photos of the Moon were made with a reflecting telescope that cost the research team £100 to make (about $161 US).
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