Rubber conducting plate with multi-layer structure and conducting particles

Abstract

The invention discloses a rubber conducting plate with a multi-layer structure and conducting particles. The rubber conducting plate with the multi-layer structure is formed by compositing a conducting layer, a transition layer and an elastic layer. Adhesive layers are arranged among the conducting layer, the transition layer and the elastic layer. The conducting layer is a compact metal thin sheet or a loose metal thin sheet. The transition layer is a polymer thin film or a second-layer compact metal thin sheet. The elastic layer is a rubber sheet or a rubber-plastic sheet, and the edge of the conducting layer can be provided with a turnup bending towards the direction of the transition layer and wrapping the transition layer. The conducting layer is made of metal with good conducting performance including gold, silver, copper, aluminum, iron and the like or alloy preferably. The metal thin sheet in transition layer is made of cheap metal including copper, iron, nickel, zinc, aluminum and the like and the alloy preferably. The conducting layer, the transition layer and the elastic layer of the rubber conducting plate with the multi-layer structure are tightly arranged together in compositing mode so as to have excellent specific strength. The conducting layer is completely separated from the elastic layer so that conducting capacity of the conducting layer is enhanced, and the elastic layer is prevented from protruding out of the conducting layer and influencing conducting effects. The rubber conducting plate with the multi-layer structure and conducting particles are applied to serve as conducting materials, electromagnetic shielding materials or conducting parts of a key.

Description

technical field [0001] The invention relates to a composite conductive rubber, which can be used for making conductive plates and conductive grains of key backings. Background technique [0002] Common rubber conductive plates or conductive particles are composed of a rubber base layer and a metal conductive surface layer. One side of the conductive plate has conductive properties, and the other side is insulated, which can be used as a conductive contact material or electromagnetic shielding material; the conductive particle is a conductive plate with a small area, which can be used as a conductive part for the backing of buttons. [0003] The applicant’s application number is 201110193369.5, which discloses a type of conductive particle composed of a metal surface layer and a rubber matrix, and the metal surface layer can form a relatively good contact with the circuit. . However, due to the thin metal surface layer, during long-term use, the rubber substrate is easily d...

AI Technical Summary

Problems solved by technology

However, due to the thin metal surface layer, during long-term use, the rubber matrix is ​​easy to deform and protrude to the outside of the metal surface layer when it is pressed heavily or absorbs oil and expands, which may block the conductive line or even cause it to fail. or false turn-on condition

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