Quick-drying silver paste for large keyboard conductive film circuit, and preparation method thereof

Abstract

The invention discloses quick-drying silver paste for a large keyboard conductive film circuit. The quick-drying silver paste is prepared from, by mass, 45-65 parts of metal silver powder, 5-10 partsof a macromolecule resin, 0-5 parts of an auxiliary agent and 30-40 parts of a solvent, wherein the metal silver powder is a mixture of flaky silver powder and nano silver powder, the metal silver powder is prepared from the following components in parts by mass: 80 to 90 parts of flaky silver powder and 5 to 10 parts of nano silver powder, the average particle size of the flaky silver powder is 5to 10 microns, the average particle size of the nano silver powder is 20 to 80 nm, and the macromolecular resin is an ethylene resin. The quick-drying silver paste can be quickly cured, is wide in base material application range and good in conductivity, can meet the full-automatic production process of customers, and achieves the purposes of reducing the labor cost and improving the 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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Problems solved by technology

[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

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