Teijin Ltd. of Japan is developing a new carbon-fiber filler that conducts heat better than silver or copper. Aimed at thermal management applications in electronics and automotive, Raheama chopped carbon fibers are about 8 microns in diam. and 50 to 200 microns long. They are also electrically conductive and thus can provide static dissipation and EMI shielding.
Two grades are being developed: R-A201 offers superior dispersion and moldability in plastics and rubber. R-A301 has higher heat conductivity. Experiments with heat sinks for LEDs show that polycarbonate filled with Raheama can disperse heat as well as aluminum, according to Teijin. Raheama has not been launched commercially. Teijin is building initial capacity for 50 tons/yr. Teijin’s carbon fibers are marketed here by Toho Tenax America, Inc., Rockwood, Tenn.
(800) 252-3001 • www.tohotenaxamerica.com
Toho Tenax America Inc.
121 Cardiff Valley Rd. Rockwood, TN 37854
Phone (800) 252-3001 Fax (865) 354-8409
Editor PickExtruding with Fillers
You can use the reference point from processing unfilled polymer to determine whether you can run filled resin on your current system.