WATER BASED MAGNETIC INK CHARACTER RECOGNITION INK JET INK BASED ON DISPERSION OF FUNCTIONALIZED NANOPARTICULATE MAGNETIC FERRITE
申请人:Nanum Nanotecnologia S/A
公开号:US20160208120A1
公开(公告)日:2016-07-21
The present invention describes a method to obtain magnetic aqueous ink composition for MICR (Magnetic Ink Character Recognition) ink jet printing comprising an aqueous dispersion of functionalized magnetic nanoparticles, humectant agents, solvents, biocide and water. It also allows obtaining stable inks for long periods with extremely high concentrations of magnetic nanoparticles with loading between 15% and 40% by mass and magnetic signals varying from 80 to 200%. Through the use and special combination of humectant agents, the present inventions increase the print head protection, by decreasing abrasiveness and increasing fluidity. The resulting ink has superior printing quality and increased service life of the printing system.