Conductive silver paste with low halogen content

Abstract

The invention relates to a conductive silver paste with low halogen content. The conductive silver paste comprises the following components by weight percent: 1-25% of vibrin, 20-55% of silver powder,0.1-9% of dispersant, 0.1-8% of adhesion promoter, 0-6% of flatting agent, 0-8% of graphite powder and 20-60% of organic solvent. Compared with the prior conductive silver paste, the conductive silver paste has low halogen content, meets the European Union requirements for environmental protection, and is an environmental-protection product. The silver paste requires a low baking temperature, hasa strong adhesion to PET films, has the advantages of low specific resistivity, moderate bending performance and moderate hardness, and therefore, is a preferable material for making environmental-protection printed circuits.

Description

【Technical field】 [0001] The technical scheme of the present invention designs a low-temperature baking-type conductive silver paste with low halogen content, which is mainly used for making membrane switches, conductive lines and heating components on flexible substrates such as PET. 【Background technique】 [0002] Currently used to make membrane switches, computer keyboard lines, and low-temperature conductive silver paste for heating components on PET films. It is mainly composed of conductive filler silver powder, ternary chlorine polymer resin, and organic solvents. The performance indicators can meet the needs of components. Composition The polymer resin in the product contains a certain amount of halogen, which will pollute the environment when the product is recycled after use. As countries around the world attach importance to environmental pollution, the European Union requires that the halogen content of products entering the market must be less than 900ppm. The ma...

AI Technical Summary

Problems solved by technology

[0002] Currently used to make membrane switches, computer keyboard lines, and low-temperature conductive silver paste for heating components on PET films. It is mainly composed of conductive filler silver powder, ternary chlorine polymer resin, and organic solvents. The performance indicators can meet the needs of components. Composition The polymer resin in the product contains a certain amount of halogen, which will pollute the environment when the product is recycled after use. As countries around the world attach importance to environmental pollution, the European Union requires that the halogen content of products entering the market must be less than 900ppm. The market urgently needs a Non-toxic and environmentally friendly conductive silver paste with moderate baking temperature and low halogen content

[0003] In the production process of low-temperature conductive silver paste, if no halogen-containing terpolymer resin or chlorine-containing additives are used, the adhesion of the conductive silver paste on the PET film material will not meet the product requirements, and the baking temperature is high. , the resistance of the silver paste is large, which cannot meet the requirements of membrane switches and computer keyboard lines