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Long on the way, ElectriPlast conductive compounds arrive

The R&D pipeline has been a long one, but officials at Integral Technologies Inc. (Bellingham, WA) indicate that their conductive thermoplastic compounds, reportedly significantly more efficient than ones as yet available, are ready for broad market deployment using various thermoplastic matrices.

The company this week officially announced its international market deployment of the ElectriPlast pellet, a patented method of pelletizing conductive plastics based on its original blend. The company also reports it has developed additional grades of material, with various matrix materials, and says it has the third-party independent and certified testing needed to prove its claims.

In January 2010 Integral released initial test results. The first pellets tested used as a matrix polyamide 6.6 with stainless steel fibers), and tests revealed that the pellet's EMI/RFI shielding properties ranged from 70dB at 30MHz to 90dB at 1.5GHz over a wide frequency spectrum from DC to UHF. By Integral's estimation this is at least a 40% improvement over competing conductive compounds. Integral works with Jasper Rubber Inc., the compounder that handles pelletizing/compounding of the ElectriPlast materials.

We have reported on Integral a number of times in the past, including here. The company's proprietary technology uses doping agents to make polymers fully conductive for heat and electricity, while also imparting radio frequency capabilities. The company now offers compounds based on ABS, PC/ABS, PP and PA66, using steel fibers or nickel-plated carbon fibers. Processors can access technical data sheets on these various compounds here. The electromagnetic shielding effectiveness for the seven just-tested blends is greater than 100 dB.

The testing to compile the sheets' data was conducted at five labs, four of them independent labs with no affiliation to Integral. All four independent labs performed electrical, mechanical and imaging/dispersion testing. The fifth lab was Integral's internal lab.

Earlier this year Integral announced it had sold a license for molding of antennas to a company it described as "one of North America's largest hearing aid companies". The OEM was not identified. Switching from metal antennae to ones molded from Integral's thermoplastic pellets means an antenna on the wireless device need no longer be encased in the device, but instead can reside outside the body of the device, designed either as a monopole or dipole antenna.

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