ExxonMobil's Santoprene Division has been offering TPEs that bond to various engineering thermoplastics for years. But there's always room for more TPEs that can chemically bond to their substrates, according to Seth Barron, consumer products manager for Santoprene. "We've seen tremendous growth in this area," he says. So much growth that the company has just extended its portfolio of materials that targets thermoplastics used often in the consumer electronics industry. These include ABS, polycarbonate, polystyrene and related blends. The company's new B 150 bonding grades, thermoplastic vulcanizates containing EPDM and an undisclosed polymer, are available in 60 and 75 Shore A hardnesses. The company's earlier B 100 EPDM-polypropylene bonding grade for engineering thermoplastics came only in a 55 Shore A hardness. The two new grades are not only harder but also improve on two key technical attributes. They do a significantly better job sticking to ABS substrates, Barron reports. Whereas the B 100 material offered a bond strength of about 21 pli on ABS, the new grades offer a bond that's stronger than the elastomer itself, which has a 800 psi tear strength. "The bond just does not fail. The TPE fails cohesively," says Barron. The new grades also offer better adhesion when overmolding TPE over a previously-molded "cold" insert — as opposed to overmolding over a "hot" first shot in a two-shot tool. B 100 has also under-gone an important change of its own. It recently received FDA approval for some food contact applications, including resealable containers and closures.
Enabling the Future is designing prosthetic appendages modeled more like superhero arms and hands than your average static artificial limbs. And they’re doing it through a website and grassroots movement inspired by two men’s design and creation in 2012 of a metal prosthetic for a child in South Africa.
In order to keep an enterprise truly safe from hackers, cyber security has to go all the way down to the device level. Icon Labs is making the point that security has to be built into device components.
Three days after NASA's MAVEN probe reached Mars, India's Mangalyaan probe went into orbit around the red planet. India's first interplanetary mission, and the first successful Mars probe launched by an Asian nation, has a total project cost of nearly $600 million less than MAVEN's.
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