Research On Copper Gravure Conductive Inks

By the analysis of the printed electronics industry status and t basic situation?the demand ofprinting electronic products increases increasingly?the international competition is becomingincreasingly fierce?to carry the world before one of?be a trend which cannot be halted in theinternational market. So strength must be increased to improve the quality of printed electronicsfrom proceed with printing electronic raw materials.Currently most of print electronic companiesstill insist on research offset printing ink, screen printing ink and injet ink, ignoring thedevelopment of gravure ink. Therefore, from the overall perspective.The research of gravureprinting conductive electronic ink is in initial stage, and the research and development of thecopper gravure printing conductive ink is one of the most challenging new topic. The mainpurpose of this paper is that a basic comparison perfect preparation gravure gravure printingconductive ink and the controlling of the performance of electrically conductive ink basicscheme is put forward to.The four parts that the studies of gravure inks by directly dispersing cropper powde, theshudies of micro-nano-scale copper powder prepared by the synthesis-concentration anddispersion prepared, the studies of formula components of the ink performance as well as theimpact on conductivity of different treatment on the sample are included in the papers.First the ink preparation is detailed studied and analysised, it is mainly researched in themethod of direct dispersion of micron copper powder. To the method of micro/nano copperpowder synthesis-concentrated-dispersio, micro nanometer copper powder bought in themarket is used as raw material, resin is used as binder?and a dispersing device is used. Thedispersion, dispersion time centrifugal degree (concentrated liquid concentration), dispersion ofvelocities and the dispersion temperature on dispersion stability are mainly discusseed. Thecharacterization of different means to evaluate dispersion effect are used. When the sand millingis use, dispersing speed is3500r/min, dispersing time is148min, the pred is persion liquidcentrifuge enrichment rate is3500r/min, and then dispersed feeding method for resin is threeequivalent to join, interval30min, dispersion effect is best and the minimum size of copper is2.6M.On the influence of various factors to the properties of inks, gravure printing applicabilityand conductive are controlled by he copper powder, copper powder morphology/resinproportion,resin,solvent, auxiliary solvent,additives,which is detailed discussed in the article. Bydifferent contrast experiment and characterization methods, resin D is selected to configure ink,the best copper/resin ratios and the best mix proportion spherical copper powder is determined; different solvent which have an influce on the ink drying performance, such as positive dry,adhesion,surface tension and electrical conductivity, are contrasted by characterization methods,that ethanol is selected as solvent.The eluent concentration, cleaning time, drying temperature, calcination temperature androughening treatment on the conductive effect of specimen are investigated. By the relationshipbetween square resistance and concentration of C8501, the best concentration of C8501is set for20%; the optimum soaking time is set for30min; By comparison of different drying temperatureand cleaning frequency conductivity, the best conductivity is set when the optimum dryingtemperature and the cleaning times are contrasted; the best cleaning frequency to3times isappropriate; the best drying temperature is set at60?, the conductivity of the sample isimproved by a set of rough treatment, the conductivity of the sample is also increased by proofssintering at120??...