Silk-screen printing ink for circuit board

Abstract

The invention discloses silk-screen printing ink for a circuit board. The silk-screen printing ink comprises the following components in parts by weight: 100 parts of epoxy acrylic acid resin, 35-45 parts of polyamide resin, 2-5 parts of benzophenone, 12-18 parts of microcrystalline wax, 3-6 parts of a curing agent, 1-4 parts of a photoinitiator, 2.4-3 parts of isopropanol, 27-33 parts of light calcium carbonate, 10-40 parts of pigment and 1-7 parts of a defoamer. The silk-screen printing ink is high in printing accuracy and deformation speed, resists external force scratch, heat shock and mechanical stripping, and is strong in adhesive force, excellent in abrasive resistance, low-toxic, odorless, safe and environment-friendly.

Description

[0001] technical field [0002] The invention belongs to the field of ink, in particular to a screen printing ink applied to circuit boards. Background technique [0003] In the printed circuit board manufacturing process, screen printing is one of the indispensable important processes. In order to obtain the fidelity of image reproduction, the ink must have good viscosity and suitable thixotropy. The so-called viscosity is the internal friction of the liquid, which means that under the action of an external force, one layer of liquid slides on another layer of liquid, and the friction exerted by the inner layer of liquid. Thick liquid inner layer sliding encounters greater mechanical resistance, and thinner liquid has less resistance. In particular, it should be pointed out that temperature has a significant effect on viscosity. [0004] Thixotropy is a physical characteristic of a liquid, that is, its viscosity decreases under agitation and quickly returns to its origin...

AI Technical Summary

Problems solved by technology

[0005] The circuit board inks in the prior art usually have the defects of poor thixotropy and difficult control of viscosity