Printing strippable protective ink, and preparation method and application thereof

Abstract

The invention discloses a printing strippable protective ink, and a preparation method and application thereof. The ink comprises the following components in parts by weight: 50-80 parts of thermoplastic film-forming resin, 20-50 parts of low-viscosity plasticizer, 1-10 parts of filler and pigment, and 1-3 parts of functional assistant. The printing strippable protective ink has 100% solid rate, does not volatilize any solvent, is a green environment-friendly material, and satisfies the increasingly higher ecological environmental requirements. The ink has the advantages of no irritating smell, moderate viscosity and no voids, is not sticky to the printing screen, and is easy for printing operation; the ink can form a film by thermosetting at medium / low temperature, so the energy consumption is low; the thermosetting film has high flexibility, favorable heat resistance, favorable insulativity and favorable acid / alkali resistance, and effectively solves the influence on the resistance when etching the circuit on a transparent conductive film with acid and alkali in the touch screen manufacturing process; and after the conductive film protecting technique is finished in the touch screen manufacturing process, the protective ink layer can be easily stripped, and does not leave any residue, thereby effectively solving the problem of protection of the conducting film in the existing touch screen manufacturing process.

Description

technical field [0001] The invention relates to a protective ink, in particular to a printing peelable protective ink and its preparation method and application. Background technique [0002] With the rapid development of science and technology, the touch screen display industry has developed rapidly, and related terminal touch products such as smart phones, computers, ATMs, navigators, etc. have penetrated into all areas of people's lives, completely changing the way of life. However, in the touch screen manufacturing process, after the surface transparent circuit of the raw material ITO film and ITO glass is etched, it is often protected by ink printing and thermal curing, and then the frame is printed with silver paste circuit process, so the protective ink can avoid the penetration of silver paste printing It causes ITO short circuit, and at the same time prevents the ITO line from being scratched and causing open circuit. [0003] Chinese patent 200710301825.7 disclose...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent 200710301825.7 discloses a printing ink, which contains acrylic resin, polyamide resin and / or cyclized rubber, solvent, filler, plasticizer, dispersant and pigment, wherein, the ink also contains nano-silica and corundum powder, the invention improves the gloss of the ink, and greatly improves the wear resistance and fire resistance of the ink after printing, but the ink contains volatile solvents and is not environmentally friendly, which seriously affects the actual industrial ecological environment. At the same time Easy to have residual glue, poor flexibility, difficult to peel off and easy to residue, etc.