Method for manufacturing elastic conductive cloth

Abstract

The invention provides a manufacturing method of an elastic electric conductivity fabric, comprising the following steps: a fabric knitted by natural fiber or artificial fiber is provided; a foaming resin is stuck on at least one surface of the fabric to form an elastic fabric; a first film with a plurality of ultrafine holes is formed on the surface of the foaming resin; the first film is electroplated to metallize the fabric; and a second film is formed on the surface of the metallized fabric.

Description

technical field [0001] The invention relates to the technical field of conductive cloth, in particular to a method for manufacturing an elastic conductive cloth with antifouling properties, weather resistance and metal adhesion. Background technique [0002] In the 1960s, space science and technology developed vigorously. Since the space is full of electromagnetic waves, in order to block the possible harm of electromagnetic waves to the human body and the interference of related precision instruments, scientists have comprehensively researched and developed electromagnetic wave shielding materials. Due to the high bending resistance and flexibility requirements , the general metal sheet or metal foil can not fully meet the needs of the characteristics, the use of electroless plating technology to metallize the polymer organic fiber into a conductive fabric with bending resistance, flexibility, conductivity and electromagnetic wave shielding function began to develop. [000...

AI Technical Summary

Problems solved by technology

The biggest disadvantage of this type of product is that the processing engineering is cumbersome and the cost is high. The hot melt adhesive may leak from the fiber hole to the surface to affect the electrical conductivity during coating. Abrasion or damage will affect its conductivity, electromagnetic wave shielding performance and weather resistance

Moreover, the minimum cutting thickness of polyurethane foam is 2mm to 3mm, and its cutting accuracy is greatly limited. Generally, the positive and negative tolerance is about 0.5mm, and there will be two errors when covering the foam. The workability is extremely difficult. There are great disadvantages and limitations for applications that require a thinner thickness of 0.05mm to 1.5mm and design applications that require high thickness accuracy.

[0007] Use generally well-known polyurethane foam or polyurethane foam sintered fabrics, knitted fabrics, non-woven fabrics, etc. to become compressive elastic materials, and then become conductive materials through electroless plating and metallization. Its conductivity and electromagnetic wave shielding performance can generally meet the requirements, but The biggest disadvantage of this kind of conductive material and the problem that users cannot overcome is that the polyurethane foam is a polyurethane polymer porous body, which has poor weather resistance, easy embrittlement, easy brittleness of the metal film and falling off, poor thickness accuracy, and cutting. The foam and metal debris are easy to fall off when cutting. What's more troublesome is that when it is used inside electronic equipment, due to poor weather resistance and metal powder is easy to fall off, it will cause the risk of short circuit of electronic equipment, and polyurethane foam generally cuts the smallest The thickness is 2mm to 3mm, which is the biggest drawback and limitation for electronic and communication equipment that is more and more concerned about thinness and shortness.

[0008] In order to improve the disadvantages of the above-mentioned conductive elastic materials, a generally well-known three-dimensional fabric design method was proposed, such as Japanese Patent Application Laid-Open No. 2001-3264. The biggest disadvantage is the three-dimensional vertical fiber part, which is the fiber part that supports the middle thickness and elasticity. , when wet impregnation method is used for electroless plating metallization, metal will be attached, and its structural design is very complicated in terms of fabric design. What is more troublesome is that the general conductive foam is used for lengthwise (warp) cutting. This kind of fabric is designed to easily cause some fibers and metal debris to fall when cutting, and there is a danger of short-circuit interference for the internal use of electronic and information equipment.

Japanese Patent Laid-Open No. 2002-84088, the main disadvantage of this product is that it must be cut accurately to the part without three-dimensional fiber filaments, which has great limitations on the processability and size specifications of the end use, and cannot effectively and fully meet the end use specifications. requirements, and if cutting to the part with three-dimensional fiber filaments in the middle, it will lose its original design function of preventing metal debris from falling, which is the same as the disadvantage of JP-A-2001-3264, which is more troublesome The most important is that due to the influence of the coiling tension during the weaving and processing of the three-dimensional fiber fabric, the support force and support type of the vertical fiber in the middle have very large disadvantages for the thickness accuracy, and the thickness of the three-dimensional fiber fabric is different in the width and weft direction. That is to say, the thickness accuracy of the parts with and without three-dimensional fiber filaments is poor. The disadvantage is that the thicker the thickness, the greater the impact on the thickness accuracy. For the electromagnetic wave shielding conductive fabric material that is more and more about the thickness accuracy, there is a very Big disadvantages and limitations, there is indeed a need to improve and develop