RTP Co. is introducing carbon nanotube compounds (CNT) in several different resin systems for improved electrical performance. In situations where engineers typically used carbon fiber reinforcements, carbon nanotubes provide much better electrical performance,” says Ned Bryant, senior product development engineer for RTP, which is based in Winona, MN. The first resin systems offered with the new technology are polycarbonate, polyetherimide and polyetheretherketone. Coming next are PC/ABS, nylon 66 and nylon 12. The nylons will be aimed at automotive components, such as fuel filler doors, where the conductive materials allow superior painting processes. Electrostatic painting is about 80 per cent efficient, while spray painting is only about 12 percent efficient. CNT compounds also process better, avoiding isotropic effects of fibers.
At IMTS last week, Stratasys introduced two new multi-materials PolyJet 3D printers, plus a new UV-resistant material for its FDM production 3D printers. They can be used in making jigs and fixtures, as well as prototypes and small runs of production parts.
Plastic bags can become useful as either raw materials for plastics or feedstock for fuel. It's when they're not recycled that they become a major problem. That's what California's bag ban will prevent.
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