A kind of insulating black ink and preparation method thereof for eliminating ito line shadow

Abstract

The invention discloses an insulation black printing ink capable of eliminating ITO line shadow and a preparation method thereof. The used modified epoxy resin (or modified polyester resin) can fulfill the requirements of an ITO elimination technology. A connecting material is the main film-forming material of the eliminating printing ink. The connecting material can attach on the ITO and strengthen the glass, and has a high insulation performance at the same time. The light refractive index of the modified epoxy resin must be synchronized with the refractive index of the ITO membrane after the epoxy resin carries out reactions with a curing agent. Thus the color difference caused by different light refractions is avoided. Carbon black with a specific color degree can be well dispersed in the connecting material, moreover the mobility of the carbon black in the connecting material is small, and the printing ink membrane is enabled to have related physical and chemical properties. During the screen printing process, the carbon black with a specific black degree can form a printing material with certain viscosity, and thus the figures can be transferred through printing. After the printing material is cured, a stable binding between the carbon black with a specific black degree / the filling particles with a specific refractive index and the basic material is formed, and the environmental requirements and printing precision requirements of touch screen industry can be met.

Description

technical field [0001] The invention relates to the field of inks, in particular to an insulating black ink for eliminating ITO line shadows and a manufacturing method thereof. Background technique [0002] Touch screen (capacitive touch screen), the mainstream uses G (glass panel) + G (glass ITO) + G (glass ITO) or G (glass panel) + F (thin film ITO) + F (thin film ITO) structure mutual capacitance Screen. With the continuous improvement of the user experience of terminal customers and consumers' requirements for the light and thin appearance of terminal smart products, various touch screen module manufacturers have developed OGS (integrated capacitive screen) touch screens that are lighter, thinner and lower in cost. The module adopts the single-chip G structure instead of the traditional G+G+G or G+F+F structure. Thus saving 2 pieces of G (ITO coated glass) or 2 pieces of F (ITO coated PET), the simplified production process improves production efficiency, reduces produ...

AI Technical Summary

Problems solved by technology

As an important part of the touch screen production process, the research and development of inks must also be able to adapt to the requirements of the OGS process; because the OGS touch screen is used in the electronic field, it needs to pass the ESD anti-static test standard, and the insulation of other inks on the market is average. Failure to pass the high-voltage electrostatic test of ESD makes the touch screen extremely susceptible to electrostatic interference during use, resulting in inaccurate touch

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