KR101925878B1 - A method of manufacturing an electromagnetic wave shielding material using an aluminum mesh and an electromagnetic wave shielding material - Google Patents

Abstract

The present invention relates to a method for manufacturing an electromagnetic wave shielding material by using an aluminum mesh and an electromagnetic wave shielding material manufactured by the same. According to the present invention, metal fiber yarn is cut to a predetermined size to melt and press through a resin film while the plurality of pieces of cut metal fiber yarn are scattered between laminated aluminum meshes, thereby having excellent electromagnetic shielding efficiency.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing an electromagnetic wave shielding material using an aluminum mesh and an electromagnetic wave shielding material produced by the method,

The present invention relates to an electromagnetic wave shielding material using an aluminum net, and more particularly, to an electromagnetic wave shielding material using an aluminum net, and more particularly, to a metal foil having a predetermined thickness by cutting a metal fiber yarn into a predetermined size, The present invention relates to an electromagnetic wave shielding material produced by using an aluminum mesh and an electromagnetic wave shielding material produced by the method.

Generally, as the degree of integration of devices increases due to the tendency of the electronic devices to be thin and short, the electromagnetic waves generated from each constituent element affect neighboring elements and cause noise or malfunction. Especially, it is an essential element in the production of aircraft.

Therefore, the shielding technology of electromagnetic waves has to be a companion role with advances in electronic technology, but is far behind in the progress of rapid electronic technology. These side effects are serious, not only in the industry, the medical profession, the office, and the home.

In order to solve the electromagnetic interference (EMI) problem described above, it is necessary to first reduce the number of power sources and the output power, strengthen the immunity so that the electronic device can perform the intended operation even in the electromagnetic environment (EMC) The electromagnetic wave from the device and the electromagnetic wave from the device must be blocked.

On the other hand, the above-mentioned electromagnetic waves are classified into low-impedance electromagnetic waves, high-impedance electromagnetic waves, and plane waves according to the characteristics of impedance. The shielding method is also different. The shielding for any arbitrary electromagnetic wave is made by reflection, absorption and multiple reflection by the shielding body. These shielding mechanisms are changed according to the impedance characteristic and the frequency of the shielding material and the electromagnetic wave.

The above-mentioned electromagnetic waves and plane waves of high impedance are shielded by the reflection of electromagnetic waves by a conductive material, and electromagnetic waves of low impedance are shielded by absorption by a material having high permeability. In view of the mechanism of absorption and reflection, the reflection is dominated by a material having high conductivity and the absorption is dominated by a material having high permeability.

In addition, since the above-described permeability and conductivity are functions that vary with frequency, proper shielding varies depending on the situation. And the most important factor for shielding is the thickness of the shield. This is due to the concept of penetration depth characteristics of electromagnetic waves expressed by skin depth.

On the other hand, it has become possible to densely use unit circuits having various functions according to the development of electronic and communication technologies in a narrow space. In addition, it is also possible to use electromagnetic waves such as a malfunction of equipment due to mutual interference of electromagnetic waves between adjacent circuits (EMI) is a serious problem.

Furthermore, electromagnetic waves generated from various electronic and communication devices have been reported to adversely affect the human body by increasing the temperature of living tissue cells due to the action of heat, weakening the immune function or transforming genes.

Accordingly, various prior arts relating to an electromagnetic wave absorber, an electromagnetic wave shielding material, or a manufacturing method thereof have been provided as means for shielding electromagnetic waves generated from various electronic and communication devices as described above.

As a technique for shielding electromagnetic waves as described above, Korean Patent Laid-Open Publication No. 2003-0086122 discloses a metal or alloy having a specific permeability of 1000 or more, a metal foil ribbon having a thickness of 1 to 900 mu m and a width of 1 to 90 mm, Discloses a technique of an electromagnetic wave shielding material using a metal foil ribbon having a high permeability, which further includes an adhesive layer formed on one surface.

Korean Patent Laid-Open Publication No. 2002-0075643 discloses a method of forming a functional film for shielding electromagnetic waves on a plastic substrate to form a multi-layered plated film on the surface of a plastic substrate and then forming a thin film of gold (Au) A single layer of each material or a combination of these single layers is formed by using a sputtering target made of at least one material of nickel, chrome, and nickel and chromium on a multilayered plated film by a magnetron sputtering method to improve the adhesion between the plated films A technique for forming a multilayer film by vapor deposition is disclosed.

Korean Patent Laid-Open Publication No. 2007-0010778 discloses that the blending ratio of the composition of the electromagnetic wave-absorption-blocking material composed of the ferrite powder, which is an oxide magnetic material, relative to the blending ratio of the synthetic resin composition is 80-90 wt% A liquid electromagnetic wave absorber is coated on the surface of a thin heat-resistant film using a coating roller so as to have a thickness of about 0.01 to 0.5 mm, and then cured by passing through a drying furnace and then the heat resistant film is removed to produce a thin electromagnetic- Manufacturing technology is published.

However, since the electromagnetic wave absorber or electromagnetic wave shielding material according to the related art as described above is difficult to manufacture as a super thin film type, and the electromagnetic wave absorption and shielding efficiency are also lower than expected, it can be widely applied to various electronic and communication devices There is a limitation in being utilized.

The electromagnetic wave absorber or electromagnetic wave shielding material according to the related art may be manufactured using carbon nanotubes (CNTs) or carbon fibers, but carbon nanotubes (CNTs) or carbon fibers are used for electromagnetic compatibility (EMC) shielding There is a problem that it can not be too expensive.

Korean Registered Patent No. 10-0990154 (published on October 26, 2010) Korean Patent No. 10-0707382 (published by Mar. 13, 2007) Korean Registered Patent No. 10-0460297 (Published in December 2004) Korean Patent No. 10-0376960 (published by Mar. 29, 2003) Korean Patent Publication No. 2009-0086714 (Published on August 14, 2009) Korean Patent Publication No. 2009-0014725 (published on Feb. 11, 2009) Korean Patent Publication No. 1999-020144 (published on March 25, 1999)

Disclosure of Invention Technical Problem [8] The present invention has been conceived to solve all the problems of the prior art, and it is an object of the present invention to provide a method of manufacturing a metal foil having excellent electromagnetic wave shielding efficiency by cutting metal fiber yarns to a predetermined size, The present invention provides an electromagnetic wave shielding material manufactured by using an aluminum mesh and an electromagnetic wave shielding material manufactured by the method.

Another object of the present invention is to provide a method and apparatus for cutting a metal fiber yarn by cutting a metal fiber yarn to a predetermined size and melt-pressing the metal fiber yarn through a resin film in a state of being scattered among a plurality of stacked aluminum meshes, So that the shielding material can be manufactured.

Another object of the present invention is to provide a thin electromagnetic wave shielding material capable of realizing weight reduction by cutting a metal fiber yarn to a predetermined size and melt-pressing the metal fiber yarn through a resin film in a state where the metal fiber yarn is scattered among a plurality of stacked aluminum meshes The present invention has been made in view of the above problems.

Further, the technique of the present invention is to replace the expensive electromagnetic wave material by manufacturing the electromagnetic wave shielding material having a structure in which the metal fiber yarn is cut to a predetermined size and is melt-pressed through a resin film in a state where a plurality of the metal fiber yarns are scattered among the aluminum net The purpose is to make it possible.

The present invention configured to achieve the above-described object is as follows. That is, a method for manufacturing an electromagnetic shielding material using an aluminum mesh according to the present invention includes the steps of: (a) arranging a resin film of a predetermined size on a die of a press mold; (b) scattering a first layer of metal fiber yarn, which has been cut to a predetermined length on the upper side of the resin film in step (a), with a predetermined thickness; (c) arranging at least one aluminum mesh on the upper side of the first layer metal fiber yarn scattered in the step (b); (d) scattering and arranging the second layer metal fiber yarn cut to a predetermined length on the aluminum net top side in the step (c) at a predetermined thickness; (e) arranging a resin film of a predetermined size on the upper side of the second layer metal fiber yarn scattered in the step (d); (f) heating and melting the upper side resin film of the step (e) and the lower side resin film of the step (a); (g) melting the resin film through step (f) to pressurize the molten resin flowing between the metal fiber yarns and the eye of the aluminum net by applying pressure with a punch of the press die; And (h) molding the molten resin of the press-molded product, which is pressed by applying a pressure with a punch of the press die through the step (g), to the electromagnetic shielding material.

The length of the metal fiber yarn in the step (b) and the step (d) in the structure according to the present invention as described above is preferably larger than that of the aluminum mesh. At this time, in the step (b) and the step (d), the metal fiber yarn may be formed of aluminum-coated aluminum fiber or metal-coated glass fiber yarn coated with aluminum metal on the surface of the glass fiber yarn.

The weight of the metal fiber yarn cut to a predetermined size in the step (b) and the step (d) in the structure according to the present invention may be the same.

In addition, in the step (c) of the construction according to the present invention as described above, large holes can be uniformly drilled in the aluminum net at a predetermined interval in comparison with the mesh net.

An electromagnetic wave shielding material using an aluminum mesh according to the present invention is an electromagnetic wave shielding material capable of absorbing and reflecting electromagnetic waves so as to shield the electromagnetic wave shielding material. The electromagnetic wave shielding material includes one or more aluminum wires arranged between resin films of a predetermined size, The resin film is melted in a state of scattering the metal fiber yarn cut to a predetermined length between the metal fiber yarns and the mesh of the aluminum net while being compressed and cured through a press, Of the electromagnetic wave shielding material.

In the structure of the present invention as described above, the length of the metal fiber yarn is preferably larger than that of the aluminum mesh. At this time, the metal fiber yarn may be formed of aluminum-coated aluminum fiber or metal-coated glass fiber yarn coated with aluminum metal on the surface of the glass fiber yarn.

In the structure according to the present invention, large holes can be evenly punctured in the aluminum net at a predetermined interval in comparison with the mesh net.

According to another aspect of the present invention, there is provided a method of manufacturing an electromagnetic shielding material using an aluminum mesh, comprising the steps of: (A) arranging a resin film of a predetermined size on a die of a press mold; (B) arranging the first layer aluminum net on the upper side of the resin film in the step (A); (C) disposing a metal fiber yarn having a predetermined length scattered at a predetermined thickness on the upper side of the first layer aluminum net in the step (B); (D) arranging a second layer aluminum net on top of the metal fiber yarn scattered to a predetermined thickness in the step (C); (E) arranging the resin film on the upper side of the second layer aluminum net of the step (D); (F) heating and melting the upper side resin film of the step (E) and the lower side resin film of the step (A); (G) melting the resin film through a process (F) to pressurize the molten resin between the eyes of the aluminum mesh and the metal fiber yarn by applying pressure with a punch of the press die; And (H) molding the molten resin of the press-molded product, which is pressed by applying a pressure with a punch of the press die through the process of step (G), into an electromagnetic wave shielding material.

In the step (C) of the constitution according to the present invention as described above, the length of the metal fiber yarn is preferably larger than that of the aluminum mesh. At this time, in the step (C), the metal fiber yarn may be composed of aluminum-coated aluminum fiber or metal-coated glass fiber yarn coated with aluminum metal on the surface of the glass fiber yarn.

In the step (B) and the step (D) of the structure according to the present invention, the first layer aluminum net and the second layer aluminum net may have the same size or different shape and have the same weight .

Also, in the step (B) and the step (D) of the configuration according to the present invention, in the first layer aluminum net and the second layer aluminum net, large perforation holes larger than the mesh net can be uniformly further punctured have.

In addition, in the structure according to the present invention, the resin film of the step (A), the first layer aluminum net of the step (B) and the resin layer of the second layer aluminum net of the step (D) The metal fiber yarn cut to a predetermined length may be further scattered to a certain thickness.

In addition, in the structure according to the present invention, one or more aluminum nets are further stacked between the first layer aluminum net and the second layer aluminum net in steps (B) and (D) The metal fiber yarn cut to a predetermined length may be scattered and arranged in a predetermined thickness.

According to another aspect of the present invention, there is provided an electromagnetic wave shielding material which can absorb electromagnetic waves and shield electromagnetic waves by shielding electromagnetic waves. The electromagnetic shielding material includes a plurality of aluminum wires arranged between resin films of a predetermined size, The resin film is melted in a state in which the metal fiber yarn cut to a predetermined length is scattered in a predetermined thickness and the molten resin is flowed between the metal fiber yarns and the eye of the aluminum net while being pressed and cured through a press, It is molded into an electromagnetic wave shielding material.

In the structure of the present invention as described above, the length of the metal fiber yarn is preferably larger than that of the aluminum mesh. At this time, the metal fiber yarn may be formed of aluminum-coated aluminum fiber or metal-coated glass fiber yarn coated with aluminum metal on the surface of the glass fiber yarn.

In the structure of the present invention, large holes can be uniformly drilled in the aluminum net at a predetermined interval in comparison with the mesh of the net.

According to the technique of the present invention, the metal fiber yarn is cut to a predetermined size and is melt-pressed through a resin film in a state where a plurality of the metal fiber yarns are scattered among the aluminum net to be laminated, thereby producing a thin electromagnetic wave shielding material having excellent electromagnetic wave shielding efficiency.

In addition, the technology according to the present invention is advantageous in that electromagnetic wave shielding material having excellent electromagnetic wave shielding efficiency but relatively low price can be manufactured, and light weight of electromagnetic wave shielding material can be realized.

In addition, as the aluminum mesh, the aluminum thin film, and the metal fiber yarn cut into a predetermined size are arranged in the resin, the electromagnetic wave shielding material is advantageous in that the thickness of the electromagnetic wave shielding material can be reduced, and the product of required strength can be molded.

Further, according to the present invention, the electromagnetic wave shielding material having a structure in which the metal fiber yarn is cut to a predetermined size and is melt-pressed through a resin film in a state in which a large number of the metal fiber yarns are scattered among the aluminum net, Can be replaced with an electromagnetic wave material of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a perspective view showing an electromagnetic wave shielding material using an aluminum net according to the present invention. FIG.
FIG. 1B is a perspective view showing metal-coated glass fiber (MGF) or metal-coated carbon fiber (MCF), which is a metal fiber yarn, in the construction of an electromagnetic wave shielding material using an aluminum mesh according to the present invention.
FIG. 1C is a plan view showing a randomly scattered state of a metal fiber yarn in the configuration of an electromagnetic wave shielding material using an aluminum net according to the present invention. FIG.
1D is a photograph showing a state of a metal fiber yarn of an electromagnetic wave shielding material using an aluminum net according to the present invention.
FIG. 2 is a perspective view showing a combination of an electromagnetic wave shielding material using an aluminum net according to the present invention. FIG.
3 is a cross-sectional view taken along the line " AA " in Fig.
FIG. 4 is a block diagram showing a manufacturing process of an electromagnetic wave shielding material using an aluminum net according to the embodiment of FIGS. 1 to 3. FIG.
5 is a perspective view showing another example of an aluminum net in the configuration according to the present invention.
FIG. 6 is a perspective view showing an electromagnetic wave shielding material using an aluminum net according to another embodiment of the present invention. FIG.
FIG. 7 is a cross-sectional view showing the combination of FIG. 6. FIG.
FIG. 8 is a block diagram showing a manufacturing process of an electromagnetic wave shielding material using an aluminum mesh according to still another embodiment of FIG. 6;
FIG. 9 is a perspective view showing another embodiment of FIG. 6; FIG.
10 is a sectional structural view of Fig. 6; Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of an electromagnetic wave shielding material according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 a is a perspective view showing an electromagnetic wave shielding material using an aluminum mesh according to the present invention, FIG. 1 b is a view showing an electromagnetic wave shielding material using an aluminum mesh according to the present invention, 1C is a plan view showing a disordered scattered state of the metal fiber yarn in the structure of the electromagnetic shielding material using the aluminum mesh according to the present invention, FIG. 1D is a plan view showing the aluminum fiber according to the present invention, FIG. 2 is a perspective view of an electromagnetic wave shielding material using an aluminum mesh according to the present invention, FIG. 3 is a cross-sectional view taken along line AA of FIG. 2, and FIG. 4 is a block diagram showing a manufacturing process of an electromagnetic wave shielding material using an aluminum net according to the embodiment of FIGS. 1 to 3. FIG.

1 to 4, a process of manufacturing the electromagnetic shielding material 100 using the aluminum mesh according to the present invention includes the steps of (a) arranging a resin film 110 of a predetermined size on a die of a press mold (S110) of arranging a first layer of metal fiber yarn (120) having a predetermined length to a predetermined thickness on the upper side of the resin film (110) (S110); (c) A step S120 of arranging one or more aluminum strands 130 overlapping the upper side of the yarn 120 in step S120; (d) a step of arranging the second layer metal fiber yarn 120a cut in a predetermined length to the upper side of the aluminum mesh 130 (S140) of arranging the resin film 110a having a predetermined size on the upper side of the scattered second layer metal fiber yarn 120a (S140), (f) The process of heating and melting the upper side resin film 110a and the lower side resin film 110 (S1 The resin films 110 and 110a are melted to melt the resin melt between the metal fiber yarns 120 and 120a and between the slits of the aluminum mesh 130. The resin films 110 and 110a are pressurized by applying pressure with a punch of a press die (S160), and (h) a step S170 of curing the molten resin of the compression-molded product, which is pressed by applying a pressure with a punch of the press die, and molding the molded product into the electromagnetic wave shielding material 100. [

The thickness of the electromagnetic wave shielding material 100 manufactured through the process of manufacturing the electromagnetic wave shielding material using the aluminum net according to the present invention is as follows: the first layer metal fiber yarn 120 cut into a predetermined length, Can be adjusted using the randomly scattered thickness of the yarn 120a. At this time, the length of the first layer metal fiber yarn 120 and the second layer metal fiber yarn 120a is 10 to 100 mm, more preferably 30 mm.

Further, in order to adjust the thickness of the electromagnetic wave shielding material 100 manufactured through the process of manufacturing the electromagnetic wave shielding material using the aluminum net according to the present invention as described above, the number of the aluminum net 130 may be one or two or more The entire thickness of the electromagnetic wave shielding material 100 manufactured using the same can be adjusted.

The process of manufacturing the electromagnetic wave shielding material 100 using the aluminum net according to the present invention will be described in detail as follows. First, as shown in FIGS. 1 to 4, a resin film 110 having a predetermined size is arranged on a die of a press mold through a step (S100).

The resin film 110 may be formed between the metal fiber yarns 120 and 120a and the aluminum mesh 130 in consideration of the thickness of the electromagnetic wave shielding material 100 to be manufactured in the step (a) One or more sheets of the metal fiber yarns 120, 120a and the aluminum net 130 may be superimposed and arranged so that the metal fiber yarns 120,

Next, after the resin film 110 having a predetermined size is arranged on the die of the press mold as described above, the resin film 110 is formed through the step (S110) in the step (b) The first layer metal fiber yarn 120 cut into a predetermined length to the upper side is scattered and arranged at a predetermined thickness. At this time, the thickness of the first layer metal fiber yarn 120 is adjusted by controlling the amount of the first layer metal fiber yarn 120 cut to a predetermined length and scattered to the upper side of the resin film 110.

As described above, the first layer metal fiber yarn 120 scattered to the upper side of the resin film 110 may be made of pure metal. In this case, in the case of the metal fiber yarn made of a pure metal, a material such as iron (Fe), stainless steel, aluminum (Al), tin (Sn) and zinc (Zn) may be used.

The first layer metal fiber yarn 120 may be formed by coating a surface of the glass fiber or carbon fiber with one of aluminum (Al), tin (Sn), zinc (Zn), and lead (Pb) . At this time, in the present invention, metal coated glass fibers (MGF) coated with aluminum (Al) or metal coated carbon fibers (MCF) coated with aluminum (Al)

On the other hand, an aluminum coated glass fiber yarn (MGF) coated with aluminum (Al) on the surface of an aluminum yarn or a glass fiber yarn formed of a pure metal or an aluminum (Al) metal as the first layer metal fiber yarn 120, The metal coated carbon fiber yarn (MCF) coated with aluminum (Al) on the fiber surface is superior in weight and electromagnetic wave shielding efficiency to other materials.

Metal coated glass fibers (MGF) coated with aluminum (Al) on the surface of a glass fiber yarn with the first layer metal fiber yarn 120 as described above or metal coated carbon fibers (Al) coated on the surface of carbon fibers The MCF has a structure as shown in FIG. 1B, and is cut to a length of 10 to 100 mm at the time of use, and is randomly scattered as shown in FIGS. 1C and 1D. Since all of the metal fiber yarns described in the following description are constructed as described above, a duplicate description will be omitted.

Next, after the first layer metal fiber yarn 120 having a predetermined length is scattered to a predetermined thickness on the upper side of the resin film 110 as described above, The aluminum mesh 130 is arranged on the upper side of the first layer metal fiber yarn 120 scattered through the process S120.

As described above, in the course of arranging the aluminum net 130 on the upper side of the first layer metal fiber yarn 120 cut into a predetermined length and scattered through the step (c) (S120), the aluminum net 130 is one Or two or more are overlapped. At this time, it is possible to control the thickness of the electromagnetic shielding material 100 manufactured by increasing or decreasing the number of the aluminum net 130.

Next, after the aluminum net 130 is arranged on the upper side of the first layer metal fiber yarn 120 scattered as described above, the step (d) of the process (S130) as shown in FIG. 1 to FIG. 4 The second layer metal fiber yarn 120a cut to a predetermined length is spread on the upper side of the aluminum mesh 130 with a predetermined thickness.

Meanwhile, the second layer metal fiber yarn 120a scattered to the upper side of the aluminum net 130 and arranged at a predetermined thickness as in the step (d) (S130) Is the same as the first layer metal fiber yarn 120 of FIG. That is, the second layer metal fiber yarn 120a is made of pure metal or glass fiber coated with a metal. In the case of the metal fiber yarn made of pure metal, iron (Fe), stainless steel, aluminum (Al), tin Zinc (Zn) or the like may be used.

In the case where the glass fiber is coated with the metal by the second layer metal fiber yarn 120a as described above, aluminum (Al), tin (Sn), zinc (Zn) and lead (Pb) Can be coated. In the present invention, a surface of glass fiber yarn coated with aluminum (Al) was used.

In the present invention, an aluminum coated glass fiber yarn in which aluminum (Al) is coated on the surface of an aluminum yarn or glass fiber yarn formed of aluminum (Al) metal as the second layer metal fiber yarn 120a is used. These aluminum or aluminum coated glass fiber yarns of pure metals are superior in weight and electromagnetic wave shielding efficiency to other materials.

In addition, as described above, by adjusting the amount of scattering of the second layer metal fiber yarn 120a and the first layer metal fiber yarn 120 scattered and arranged on the upper side of the aluminum mesh 130, The thickness of the entire electromagnetic shielding member 100 can be adjusted.

Next, as described above, after the second layer metal fiber yarn 120a cut to a predetermined length to the upper side of the aluminum net 130 is scattered to a predetermined thickness, e) Arranging the resin film 110a of a certain size on the upper side of the second layer metal fiber yarn 120a scattered through the step S140.

As described above, the resin film 110a in the step (e) (S140) is also formed in the step (a) in the same manner as the resin film 110 in the step (S100), considering the thickness of the electromagnetic wave shielding material 100 to be manufactured In order for the metal fiber yarns 120 and 120a and the aluminum net 130 to insert-mold into the resin that flows sufficiently between the metal fiber yarns 120 and 120a and the eyes of the aluminum net 130, One or two or more can be stacked.

Next, after the resin film 110a having a predetermined size is arranged on the upper side of the second layer metal fiber yarn 120a as described above, the resin film 110a having a predetermined size is arranged in a step S150 as shown in FIG. 1 to FIG. The upper side resin film 110a of step (e) S140 and the lower side resin film 110 of step (a) process S110 are heated and melted.

The upper side resin film 110a of the step (e) S140 and the lower side resin film 110 of the step (a) S110 are heated through the above-described step (f) In the melting process, the laminated resin film 110, the first layer metal fiber yarn 120, the aluminum mesh 130, the second layer metal fiber yarn 120a, and the resin film 110a are dies and punches of the press die The resin films 110 and 110a are heated by a heating device to melt the upper and lower resin films 110 and 110a.

On the other hand, if the upper and lower resin films 110 and 110a are melted by heating of the heating device as described above, the melted resin is melted between the metal fiber yarns 120 and 120a pressed by the die of the press die and the punches And the metal fiber yarns 120 and 120a and the aluminum net 130 are bonded to each other by the curing of the molten resin through the subsequent process.

Next, the upper side resin film 110a and the lower side resin film 110 are heated and melted as described above. Then, as shown in FIGS. 1 to 4, The films 110 and 110a are melted to press the molten resin between the metal fiber yarns 120 and 120a and between the eyes of the aluminum net 130 by applying a pressure with a punch of the press die.

In other words, as described above, in step (g) (S160), molten resin of the upper side resin film 110a and the lower side resin film 110 is melted between the metal fiber yarns 120 and 120a and between the aluminum mesh 130 The metal fiber yarns 120 and 120a and the aluminum mesh 130 are connected to each other by pressurizing them with a die and a punch of a press die.

The melted resin is compressed between the metal fiber yarns 120 and 120a and between the eyes of the aluminum net 130 with the die and the punch of the press die so that the metal fiber yarns 120 and 120a and the aluminum net 130 Are connected to each other so that the metal fiber yarns 120 and 120a and the aluminum net 130 are electrically connected to each other so that electromagnetic waves can be shielded.

Next, as described above, while the molten resin flows between the metal fiber yarns 120 and 120a and the eye of the aluminum net 130, the pressure is applied by the die and the punch of the press die, As shown in step (h) 170, the molten resin of the press-molded product, which is pressed by the die and the punch of the press die, is cured to form the electromagnetic wave shielding member 100.

In other words, in the step (h) 170 as described above, the electromagnetic shielding material 100 of the thin plate is formed by curing the molten resin of the press-molded product which is pressed by applying a pressure with a die and a punch of the press die. At this time, the metal fiber yarns 120 and 120a and the aluminum mesh 130 are connected to each other by the molten resin.

Accordingly, in the process of manufacturing the electromagnetic shielding material 100 using the aluminum net according to the present invention, the lower side resin film 110, the first layer metal fiber yarn 120, the aluminum mesh ( 130, the second layer metal fiber yarn 120a and the upper side resin film 110a are arranged and then the lower and upper resin films 110, 110a are melted and pressure-bonded, The electromagnetic wave shielding material 100 is manufactured.

As described above, the electromagnetic wave shielding material 100 molded through the step (h) 170 is the electromagnetic shielding material 100 to be manufactured in the present invention. That is, the electromagnetic wave shielding material 100 according to the present invention has a structure in which one or more aluminum wires 130 are arranged between resin films 110 and 110a of a predetermined size, and the aluminum wires 130 and the resin films 110, The resin films 110 and 110a are melted by arranging the metal fiber yarns 120 and 120a cut into a predetermined length between the metal fiber yarns 120 and 120a while arranging the metal fiber yarns 120 and 120a scattered to a predetermined thickness between the metal fiber yarns 120 and 120a, 13 by pressing and curing through a press while flowing the molten resin.

Meanwhile, in the process of manufacturing the electromagnetic wave shielding material 100 as described above, the weights of the metal fiber yarns 120 and 120a cut to a predetermined size in the step (b) (S110) and the step (d) Weight. Of course, the weights of the metal fiber yarns 120 and 120a in the step (b) S110 and the step (d) S130 may be different.

5 is a perspective view showing another embodiment of an electromagnetic wave shielding material using an aluminum net according to the present invention.

As shown in FIG. 5, in the process of manufacturing the electromagnetic wave shielding material 100 according to the embodiment of FIGS. 1 to 4, the aluminum net 130 of the step (c) 132 may be further uniformly punctured at regular intervals.

As described above, the formation of the large perforation hole 132 in the aluminum net 130 compared to the mesh of the net is intended to further reduce the weight of the electromagnetic shielding material 100 to be manufactured. In this case, when the aluminum mesh 130 in which the perforation holes 132 are uniformly perforated at regular intervals is used, the length of the metal fiber yarns 120 and 120a is cut larger than the diameter of the perforation holes 132 Is better.

FIG. 6 is a perspective view showing another embodiment of an electromagnetic wave shielding material using an aluminum net according to the present invention. FIG. 7 is a cross-sectional view showing a combined state of FIG. 6. FIG. FIG. 2 is a block diagram showing a manufacturing process of an electromagnetic wave shielding material using an aluminum mesh. FIG.

6 to 8, the electromagnetic shielding material 200 according to another embodiment of the present invention may be manufactured by: (A) arranging a resin film 210 having a predetermined size on a die of a press mold S200, (B) a process (S210) of arranging the first layer aluminum net 220 on the upper side of the resin film 210, (C) a step of arranging the metal fiber yarn 230 A step S230 of arranging the second layer aluminum mesh 220a on the upper side of the metal fiber yarn 230 scattered to a predetermined thickness S230, A process S250 of arranging the resin film 210a on the upper side of the two-layer aluminum net 220a (S240), (F) heating and melting the upper side resin film 210a and the lower side resin film 210, The resin films 210 and 210a are melted to melt the resin melt between the eyes of the aluminum net 220 and 220a and the metal fiber yarn 230, (S260) and (H) pressing the punch of the press mold to form a molten resin of the press-molded product and molding the molten resin into the electromagnetic shielding material 200 (S270 ). At this time, the first layer aluminum net 220 and the second layer aluminum net 220a may be formed by overlapping one or more layers.

The electromagnetic wave shielding material 200 according to another embodiment of the present invention includes a resin film 210, a first layer aluminum net 220, a metal fiber yarn 230, a second layer aluminum net 220a, The resin film 110a and the resin film 110a constitute the first layer metal fiber yarn 120 and the second metal fiber yarn 120a, 1 to 4, the electromagnetic wave shielding material 100 may be manufactured differently from the manufacturing process of the electromagnetic shielding material 100 as shown in FIGS.

The resin film 210, the first layer aluminum net 220, the metal fiber yarn 230, the second layer aluminum net 220a, and the resin film 210a are formed in the same manner as in the above- The resin film 110, the first layer metal fiber yarn 120, the aluminum mesh 130, the second metal fiber yarn 120a and the resin film 110 constituting the electromagnetic wave shielding material 100 as shown in Figs. The description of the resin film 210, the first layer aluminum net 220, the metal fiber yarn 230, the second layer aluminum net 220a and the resin film 210a is the same as that of the first layer aluminum sheet 110a, 4, which is incorporated herein by reference.

The length of the metal fiber yarn 230 in the step (C) S220 of the constitution according to the present invention as described above is formed to be longer than the length of the eyes of the aluminum net 220 and 220a. In step (C) (S220), the metal fiber yarn 230 is a metal-coated glass fiber yarn coated with aluminum metal on the surface of aluminum yarn or glass fiber yarn with aluminum thread. These aluminum or aluminum coated glass fiber yarns of pure metals are superior in weight and electromagnetic wave shielding efficiency to other materials.

The first layer aluminum net 220 and the second layer aluminum net 220a in the step (B) S210 and the step (D) S230 of the configuration according to the present invention as described above, The sizes may be the same or different. At this time, the first layer aluminum net 220 and the second layer aluminum net 220a may have the same weight.

In addition, in the structure according to the present invention as described above, the first layer aluminum network 220 and the second layer aluminum network 220a in the step (B) (S210) and the step (D) A larger perforation hole (see FIG. 5) than the eye can be uniformly further punctured at regular intervals. Such a hole may be useful for controlling the weight of the electromagnetic shielding material 200 to be manufactured.

FIG. 9 is a perspective view showing another embodiment of FIG. 6, and FIG. 10 is a sectional view of FIG.

As shown in FIGS. 9 and 10, between the resin film 210 of the step (A) S200 and the first layer aluminum net 220 of the step (B) and the step (D) of the step The metal fiber yarns 230 cut to a predetermined length may be scattered to a certain thickness and arranged between the second layer aluminum net 220a and the resin film 210a of the step (E)

In addition, in the configuration according to the present invention, between the first layer aluminum net 220 and the second layer aluminum net 220a in the step (B) process (S210) and the process (S230) Aluminum meshes may be further stacked, and the metal fiber yarns 230 cut into a predetermined length may be scattered to a predetermined thickness between the aluminum meshes.

The electromagnetic wave shielding material 200 according to the present invention manufactured through the above-described structure is formed by stacking and arranging a plurality of aluminum nets 220 and 220a between resin films 210 and 210a of a predetermined size, The resin films 210 and 210a are melted by arranging the metal fiber yarns 230 cut into a predetermined length between the metal wires 200 and 220 and the metal wires 200 and the aluminum wires 220, 220a are pressed and cured through a press while the molten resin is flowing through the eyes of the electrodes 220a, 220a.

[Experiment]

Using the method according to the present invention, an electromagnetic wave shielding material was prepared by using 20 wt% of aluminum net, 25 wt% of metal fiber yarn and 55 wt% of resin in the production of electromagnetic wave shielding material. Table 1 shows the values of the electromagnetic shielding materials using the aluminum net thus manufactured as compared with the standard iron.

Products Material Contents
(%) Basis
weight Thick
-ness Shield Effectiveness ( Magnetic field test method  )
(dB) AL-
MGF AL-
Mesh Epoxy Resin (g / m 2) (mm) 500
kHz 800
kHz 1000
kHz 1200
kHz 1400
kHz 1600
kHz Psalter
size SPCC Only Iron (SPCC) 6096 0.75 24.2 24.9 25.7 26.3 26.9 26.8 29.7 x 21.0 example
invent 25 20 55 2708 2.50 23.2 24.0 24.7 25.1 25.5 25.5 29.7 x 21.0

As shown in Table 1, it can be seen that the electromagnetic wave shielding material using the aluminum net according to the technique of the present invention is much thicker than the standard iron material, while the weight is considerably lighter than the standard iron material. In addition, in terms of electromagnetic wave shielding efficiency, it can be seen that it is close to iron material, so that the superiority of the electromagnetic wave shielding material using the aluminum net according to the present invention can be seen.

As described above, the electromagnetic wave shielding material according to the present invention is manufactured by cutting a metal fiber yarn to a predetermined size and melt-pressing the metal fiber yarn through a resin film in a state of being scattered among a plurality of aluminum nettings to produce a thin electromagnetic wave shielding material having excellent electromagnetic wave shielding efficiency It is possible to manufacture an electromagnetic wave shielding material having a high electromagnetic wave shielding efficiency and a comparatively low price.

Further, the electromagnetic wave shielding material according to the present invention manufactured through the above-described method has advantages that it can manufacture a thin electromagnetic wave shielding material capable of realizing weight reduction and can replace an expensive electromagnetic wave material.

The present invention is not limited to the above-described embodiments, and various modifications may be made within the scope of the technical idea of the present invention.

100. An electromagnetic wave shielding material 110, 110a. Resin film
120. First layer metal fiber yarn 120a. The second layer metal fiber yarn
130. Aluminum mesh 132 Hole hole
200. Electromagnetic wave shielding material 210, 210a. Resin film
220. Layer 1 Aluminum Mesh
220a. The second layer aluminum mesh
230. Metal fiber yarn

Claims (20)

(a) arranging a resin film of a predetermined size on a die of a press mold;
(b) scattering a first layer of metal fiber yarn, which has been cut to a predetermined length on the upper side of the resin film in step (a), with a predetermined thickness;
(c) arranging at least one aluminum mesh on the upper side of the first layer metal fiber yarn scattered in the step (b);
(d) scattering and arranging a second layer of metal fiber yarn having a length longer than the length of the aluminum mesh on the aluminum net top side in the step (c) with a predetermined thickness;
(e) arranging a resin film of a predetermined size on the upper side of the second layer metal fiber yarn scattered in the step (d);
(f) heating and melting the upper side resin film of the step (e) and the lower side resin film of the step (a);
(g) melting the resin film through step (f) to pressurize the molten resin flowing between the metal fiber yarns and the eye of the aluminum net by applying pressure with a punch of the press die; And
(h) pressing the press mold with a punch of the press die through a step (g) to mold the molten resin of the press-molded product into an electromagnetic wave shielding material. Way. The method of claim 1, wherein the metal fiber yarn in step (b) and step (d) is a metal coated glass fiber yarn coated with aluminum metal on the surface of aluminum yarn or glass fiber yarn, METHOD FOR MANUFACTURING ELECTROMAGNETIC WAVEGUIDE MATERIAL USING NETWORK delete The method of claim 1, wherein the weight of the metal fiber yarn cut to a predetermined size in the step (b) and the step (d) is the same. The method of claim 1, wherein in the step (c), large holes are drilled in the aluminum net more uniformly at a predetermined interval than the mesh of the net. An electromagnetic wave shielding material capable of absorbing and reflecting electromagnetic waves to shield them,
A metal fiber yarn cut to have a length longer than that of the aluminum mesh is scattered to a certain thickness between the aluminum mesh and the resin film by arranging one or more aluminum meshes overlapping between the resin films of a predetermined size Wherein the resin film is melted in an arrayed state to melt and flow the molten resin between the metal fiber yarns and the mesh of the aluminum mesh, and is pressed and cured through a press to form an electromagnetic wave shielding material of a thin plate. Electromagnetic wave shielding material. [7] The electromagnetic shielding material of claim 6, wherein the metal fiber yarn is a metal coated glass fiber yarn coated with aluminum metal on the surface of aluminum yarn or glass fiber yarn with aluminum thread removed. delete [7] The electromagnetic shielding material of claim 6, wherein the aluminum net is uniformly further punctured at a predetermined interval. (A) arranging a resin film of a predetermined size on a die of a press mold;
(B) arranging the first layer aluminum net on the upper side of the resin film in the step (A);
(C) scattering the metal fiber yarn cut with a predetermined thickness so as to have a longer length than that of the aluminum mesh on the first layer aluminum mesh side in the step (B);
(D) arranging a second layer aluminum net on top of the metal fiber yarn scattered to a predetermined thickness in the step (C);
(E) arranging the resin film on the upper side of the second layer aluminum net of the step (D);
(F) heating and melting the upper side resin film of the step (E) and the lower side resin film of the step (A);
(G) melting the resin film through a process (F) to pressurize the molten resin between the eyes of the aluminum mesh and the metal fiber yarn by applying pressure with a punch of the press die; And
(H) a step of molding the electromagnetic shielding material by using an aluminum mesh, and curing the molten resin of the press-molded product by applying a pressure with a punch of the press mold through a step (G) Way. [10] The method of claim 10, wherein the metal fiber yarn in step (C) is a metal coated glass fiber yarn in which aluminum fibers are coated with aluminum metal on the surface of aluminum yarn or glass fiber yarn Way. delete [10] The method of claim 10, wherein, in the step (B) and the step (D), the first layer aluminum net and the second layer aluminum net have the same size or different shapes, A method of manufacturing an electromagnetic wave shielding material using an aluminum mesh. 11. The method of claim 10, wherein in the step (B) and the step (D), the first layer aluminum mesh and the second layer aluminum mesh are uniformly further punctured Wherein the electromagnetic wave shielding material is made of aluminum. The method of claim 10, wherein the resin film of the step (A), the first layer aluminum net of the step (B), and the resin film of the second layer aluminum net of the step (D) Wherein the metal fiber yarn cut to a predetermined length is further scattered to a predetermined thickness and is further arranged. 11. The method of claim 10, wherein one or more aluminum nets are further stacked between the first layer aluminum net and the second layer aluminum net in the step (B) and the step (D) Wherein the metal fiber yarn is cut into a predetermined length, and the metal fiber yarn is further scattered to a predetermined thickness. An electromagnetic wave shielding material capable of absorbing and reflecting electromagnetic waves to shield them,
A plurality of aluminum nets are stacked and arranged between resin films of a predetermined size, and the metal fiber yarns are scattered to have a length longer than the eyes of the aluminum mesh between the stacked aluminum nets, Wherein the molten resin flows between the metal fiber yarns and the mesh of the aluminum mesh, and is pressed and cured through a press to be formed into a thin plate electromagnetic wave shielding material. [18] The electromagnetic shielding material of claim 17, wherein the metal fiber yarn is a metal coated glass fiber yarn coated with aluminum metal on the surface of aluminum yarn or glass fiber yarn from which aluminum is threaded. delete [18] The electromagnetic shielding material of claim 17, wherein the aluminum mesh is uniformly further punctured with holes having a size larger than that of the mesh, at regular intervals.

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