Wednesday, January 05, 2011

US Patent 7862765 - Injection molding CNTs

Injection molding is a common technique used in forming plastic parts for a variety of industries. This patent from Semes Co. teaches a method of injection molding using carbon nanotubes to form plastic devices which can block electromagnetic waves and disperse static electricity. Claim 1 reads:

1. A method of synthesizing a conductive composite, the method comprising:

injecting pellets, which were created by extruding carbon nanotubes CNTs and polymers, into an injection-molding machine and injection-molding the pellets by using the injection-molding machine; and

applying an electric field to the pellets which are being injection-molded by the injection-molding machine so as to induce the CNTs in a composite into which the pellets are injection-molded to have an isotropic orientation.