A kind of fast-drying silver paste for large keyboard conductive film circuit and preparation method thereof

Abstract

The invention discloses a quick-drying silver paste for a large keyboard conductive film circuit, which comprises the following components by mass: 45-65 parts of metal silver powder, 5-10 parts of polymer resin, 0-5 parts of auxiliary agent, and 30-30 parts of solvent 40 parts; metallic silver powder is the mixture of flaky silver powder and nano-silver powder, each component in the metallic silver powder is made into according to the mass fraction: 80-90 parts of flaky silver powder, 5-10 parts of nano-silver powder, wherein, the average particle size of flaky silver powder The diameter is 5-10μm, the average particle size of nano-silver powder is 20-80nm; the polymer resin is vinyl resin. It can be quickly cured, has a wide range of substrate applications, and has good conductivity. It can meet customers' fully automated production processes, reduce labor costs, and enhance product competitiveness.

Description

technical field

[0001] The invention relates to the technical field of conductive paste, in particular to a quick-drying silver paste for a large keyboard conductive film circuit and a preparation method thereof. Background technique

[0002] The large keyboard conductive film circuit is made of silver paste through screen printing. Due to the long drying and curing time of the existing silver paste, it needs to go through two drying and curing processes, that is, after the film line is pre-dried by IR oven, It needs to be baked in an oven before entering the subsequent process. According to statistics, the per capita monthly production capacity of each factory is 10,000 sets. In order to improve the production effect, the factory adopts the automatic printing process and the back-end process also adopts the fully automatic process, and requires only one pass through the IR baking process to complete the baking process of the film route products made of silver paste, which r...

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