Nickel-copper composite metal textile and preparation method thereof

Abstract

The fabric with compounded metal nickel and copper is prepared with dacron or nylon fabric, and through surface roughening, sensitizing, activating, chemically plating one layer of metal nickel, electroplating one intermediate copper layer, and finally electroplating one protecting nickel layer. The formed Ni-Cu-Ni layers have nickel amount o 5-20 g / sq m and Cu / Ni weight ratio of 1.5-3; and the metal fabric has excellent electromagnetic shielding effect on low frequency electromagnetic wave, and the shielding effect is 60-90 dB in the frequency range of 10 KHz-3 GHz, and 50-70 dB in the frequency below 10 KHz.

Description

technical field [0001] The invention relates to a metal fabric and a preparation method thereof, in particular to an electromagnetic shielding fabric prepared by depositing a nickel-copper-nickel composite coating on polyester cloth or nylon cloth and a method thereof. Background technique [0002] With the rapid development of modern technology and the improvement of living standards, high-tech products are more and more popular among people, bringing people convenience in life and spiritual enjoyment. The more serious, anti-electromagnetic radiation has become a topic of environmental protection that people pay attention to. The most convenient and effective way to prevent electromagnetic radiation is to use electromagnetic shielding, that is, to use conductive and magnetically conductive metal mesh to block the propagation of electromagnetic radiation through reflection and absorption effects. There are many methods for preparing nickel cloth, copper cloth, and composite...

AI Technical Summary

Problems solved by technology

However, in the patent documents (such as invention patents CN00103011.6 and CN00125485.5) of the electroless plating method disclosed in the past to prepare non-metallic conductive cloth, the use of formaldehyde causes damage to the environment and threatens the health of operators; The method is to mix conductive powder (such as nickel powder, silver powder, graphite powder, etc.) layer thickness, and the bonding force between the conductive coating and the fiber fabric is low, the bending, softness and air permeability are poor, and the electrical properties are not easy to control; the metal fiber blending method is to weave metal wire or carbon wire into the fiber fabric Composed of this material, the manufacturing process of this material is complicated, the cost is high, it is not suitable for bending, and its electrical properties (such as resistivity, etc.) are not easy to control, and the electromagnetic shielding performance is not ideal; .5, etc.), the cost of the conductive cloth produced is high, and the shielding effect is limited