Conductive paint for shielding signals and use method thereof

Abstract

The invention discloses conductive paint for shielding signals and a use method of the conductive paint. The conductive paint comprises a prime coat, a floating coat and a top coat, and the prime coat is composed of a component A and a component B; the component A is prepared from the following raw materials in percentage by weight: 22 to 32 percent of semi-finished product resin, 35 to 45 percent of conductive copper paste, 15 to 25 percent of cyclohexanone, 5 to 15 percent of butyl ester, 0.5 to 1.5 percent of anti-settling agent, 0.1 to 1 percent of defoaming agent and 1 to 2 percent of silane coupling agent; the semi-finished resin is prepared from the following raw materials in percentage by weight: 5-15% of cyclohexanone, 10-20% of ethylene glycol monobutyl ether, 10-20% of PMA, 15-25% of butyl ester and 35-45% of hydroxy acrylic resin; the floating coat is prepared from the following raw materials in percentage by weight: 10-15% of thermoplastic acrylic resin, 5-15% of cyclohexanone, 5-15% of PMA, 1-5% of an anti-settling aid, 40-45% of conductive copper paste and 15-25% of conductive pure silver paste. Three layers of coatings are adopted to form the high-performance signal shielding layer, the resistance value of the floating coat in the conductive paint is below 0.2 ohm, signals can be absolutely shielded, the method is used for replacing an original signal shielding layer made of metal, cost can be effectively reduced, and efficiency can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of conductive paint, in particular to a conductive paint for shielding signals and a method for using the same. Background technique [0002] The signal shielding cover is mainly used in the field of 3C electronic products such as mobile phones and computers, mainly to prevent signal interference between various electronic components, so it is necessary to shield the signals of some electronic components, especially in 5G mobile phones. High degree of requirements, so the fingerprint module, camera module and other working module signals must be shielded. For example, during video chat, there will be interference between the camera module and the mobile phone call signal, resulting in screen flickering or calls. If it is not clear, it is necessary to shield the signal transmitter and camera module. The existing method of shielding the signal is to use metal to make a shielding cover to avoid signal interfer...

AI Technical Summary

Problems solved by technology

However, the above-mentioned existing conductive ink has a general conductive effect and poor adhesion, so it cannot shield the signal.

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