Conductive ink refers to an ink printed on a non-conductive substrate so that it has the ability to conduct current and eliminate static charges. The traditional conductive inks and printing technologies adopt the screen printing method. The conductive ink products are solvent-based. During the use of these products, due to the volatilization of organic solvents, they not only pollute the environment, but also endanger the health of operators. The printing method has low output and high cost and cannot be produced in large quantities. At present, microelectronics technology is infiltrating into various fields. Conductive ink and conductive printing technology have emerged as a new technology. Membrane switch circuit boards print conductive ink on PET film, and then print the printed film and decorative art panels. And other combinations. The utility model has the advantages of simple structure, beautiful appearance, excellent environment resistance and long service life, and is convenient for high density. Membrane switch circuit board has become the mainstream of various electronic instruments in foreign countries, and is widely used in fax machines, copiers, telephones, mobile phones, electronic toys, measuring devices and medical instruments.

The printing and packaging department of Wuhan University has developed a water-based conductive ink product without irritating odor, no organic solvent (VOC) volatilization, and can be directly diluted with water during use. The printing equipment can be directly washed with water, and there is no pollution to the workshop environment. The safety and health are guaranteed. The product can be cured at low temperature, the curing temperature is within 100°C, and the adhesion fastness, low resistivity, and good electrical conductivity are stable. Especially, the product is not only suitable for screen printing, but also can be used for today's advanced flexography and gravure printing. Continuous production can greatly increase production efficiency and will greatly promote the healthy and rapid development of China's electronic information industry and printing industry.