KR102138782B1 - Durable electromagnetic shielding conductive gasket - Google Patents

Abstract

The disclosed content relates to an electromagnetic wave shielding conductive gasket with strong durability and, in more detail, comprises: an elastic core; a conductive fiber layer laminated on the outer circumference surface of a core through a non-conductive adhesive to surround the core; a conductive surface reinforcing layer laminated on the circumference surface of the conductive fiber layer through a first conductive adhesive to surround the conductive fiber layer; and a lower conductive fiber sheet attached to the lower side of the conductive surface reinforcing layer through a second conductive adhesive and attached to an electromagnetic wave shielding object through a third conductive adhesive. The gasket made of the above structure secures conductivity and has strong durability against external force on the surface.

Description

Durable conductive gasket for shielding electromagnetic waves{DURABLE ELECTROMAGNETIC SHIELDING CONDUCTIVE GASKET}

Disclosed is a conductive gasket for shielding electromagnetic waves having strong durability, and more particularly, relates to a conductive gasket for shielding electromagnetic waves with excellent durability, electrical conductivity, and simple manufacturing.

Unless otherwise indicated herein, the content described in this section is not prior art to the claims of this application and is not admitted to be prior art by inclusion in this section.

Small portable electronic devices have become a necessity of life, and there is an increasing concern about the emission of electromagnetic waves. Electromagnetic waves are a combination of electric and magnetic fields in the form of energy generated by the use of electricity. The electric field is shielded by all conductive objects, but the magnetic field has strong permeability through all objects. The magnetic field is known to have a harmful effect on the human body.

Electromagnetic waves have become an essential element in everyday life as a core element of wireless information and communication technology. Recently, electromagnetic interference has frequently occurred as electronic devices have been developed, including digitization of computers and fax machines.

In general, electromagnetic waves generated from internal circuits of various electronic devices are radiated to the outside through the air or conducted through a power line. Therefore, a gasket having an electromagnetic wave shielding function is used so that electromagnetic waves generated in the circuit of the electronic device are not radiated to the outside.

In the case of gaskets, durability to maintain mechanical properties such as impact resistance, abrasion resistance, and reliability, as well as high electromagnetic wave shielding efficiency, while preventing the intrusion of moisture or foreign matter from the outside, is required.

In the conventional case, there is a problem in that scratches or deformations occur due to external force using only a conductive fabric. In the case of Korean Patent Publication No. 10-2008-0005005, a sheet in which an elastic porous body, a catalyst layer, and a plating film are sequentially stacked is disclosed. When the plating film is used alone, it is easily abraded by scratches due to external force, and there is a concern that the conductivity is reduced.

1. Korea Patent Publication No. 10-2008-0005005 "Elastic porous body sheet for electromagnetic wave shielding and method for manufacturing the same" 2. Korean Patent Application Publication No. 2003-0033825 "Method for manufacturing gaskets for shielding electromagnetic waves"

Disclosed is to provide a gasket for shielding electromagnetic waves that secures conductivity and has strong durability against external forces on the surface.

Also, it is not limited to the technical problems as described above, and it is apparent that another technical problem may be derived from the following description.

Disclosed as one embodiment is a conductive fiber layer laminated on the outer circumferential surface of the core through a non-conductive adhesive to cover the core of the elastic material and the core, the conductive fiber layer through the first conductive adhesive to surround the conductive fiber layer, etc. Conductive for shielding electromagnetic waves having high durability including a conductive surface reinforcement layer laminated on the surface and a lower conductive fiber sheet attached to a lower surface of the conductive surface reinforcement layer through a second conductive adhesive and attached to the electromagnetic wave shielding object through a third conductive adhesive Gaskets are described.

According to a preferred feature of the disclosed subject matter, the core may be formed by foaming any one selected from the group consisting of polyurethane, silicone and acrylic.

According to a preferred feature of the disclosed content, the conductive fiber layer may be formed by plating at least one selected from the group consisting of nickel, copper, and gold on a woven or nonwoven fabric.

According to a preferred feature of the disclosed content, the first and second conductive adhesive layers may include at least one selected from the group consisting of nickel, copper, and silver.

According to a preferred feature of the disclosed content, the conductive surface reinforcement layer may be formed of a metal or conductive fiber material.

According to a preferred feature of the disclosed content, the metal may be made of nickel-plated copper foil or aluminum foil.

According to a preferred feature of the disclosed content, the conductive fiber material may be formed by plating any one selected from the group consisting of nickel, copper, and gold on a woven or non-woven fabric.

According to a preferred feature of the disclosed content, the conductive fiber sheet may be formed by plating any one selected from the group consisting of nickel, copper and gold on a woven or non-woven fabric.

The conductive gasket for strong electromagnetic wave shielding as described above exhibits an effect of ensuring conductivity and also having strong durability against external forces on the surface.

In addition, the outer surface is plated and has excellent corrosion resistance.

The effects of the present embodiments are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a view showing a cross-sectional view of a gasket according to an embodiment of the disclosed content.

Hereinafter, the preferred embodiment of the present invention and the physical properties of each component will be described in detail, but it is intended to be described in detail so that a person skilled in the art to which the present invention pertains can easily implement the invention. This does not mean that the technical spirit and scope of the present invention is limited.

The conductive gasket for shielding electromagnetic waves having strong durability is a conductive fiber layer 30, the conductive fiber layer 30 laminated on the outer peripheral surface of the core through a non-conductive adhesive 20 to surround the core, as shown in FIG. The conductive surface reinforcement layer 50 laminated on the outer surface of the conductive fiber layer through the first conductive adhesive 40 to surround the fiber layer and the second conductive adhesive 60 attached to the lower surface of the conductive surface reinforcement layer and shielded from electromagnetic waves A conductive gasket for shielding electromagnetic waves having strong durability including a conductive fiber sheet 70 attached to a target through a third conductive adhesive 80 is described.

The elastic core 10 may be formed by foaming any one selected from the group consisting of polyurethane, silicone and acrylic. It is preferred that the core has a thickness of 150 to 250 μm. When using a polyurethane foam as a core, it is preferable to use an independent foam polyurethane material. With the use of an independent foam polyurethane foam, the overall thickness can be reduced in half compared to a gasket of 400 to 500 μm which is commonly used.

The non-conductive adhesive 20 used to wrap the conductive fiber layer is made of one adhesive selected from the group consisting of silicone, acrylic and urethane, or mixed with 30 to 200 parts by weight of ceramic to 100 parts by weight of adhesive made of silicone, acrylic and urethane Can be done.

The conductive fiber layer 30 laminated on the outer circumferential surface of the core is made by plating at least one selected from the group consisting of nickel, copper, and gold on a woven fabric or a nonwoven fabric to impart the conductivity of the gasket and to prevent the gasket from being deformed by external force. Do it.

The first conductive pressure sensitive adhesive 40, the second conductive pressure sensitive adhesive 60, and the third conductive pressure sensitive adhesive 80 may include at least one selected from the group consisting of nickel, copper, and silver.

The conductive surface reinforcing layer 50 is formed of a metal or a conductive fiber material, and the metal may be made of nickel-plated copper foil or aluminum foil. Further, the conductive fiber material may be formed by plating any one selected from the group consisting of nickel, copper, and gold on a woven or non-woven fabric. While using the metal or conductive fiber material to impart conductivity, it has a strong durability that does not deform the gasket by external force.

At this time, by forming a coating layer on the outer surface of the conductive surface reinforcement layer 50, it is possible to prevent oxidative corrosion of the conductive surface reinforcement layer 50. The thickness of the resin coating layer is sufficient to be less than 1 micrometer, and the conductivity should not be affected. The coating layer is preferably a polyurethane resin composition containing carbon nanotubes, and can compensate for minute cracks in the surface reinforcement layer 50 and prevent traces such as fingerprints.

The conductive fiber sheet 70 attached to the lower side of the conductive surface reinforcing layer 50 through a second conductive adhesive is made by plating any one selected from the group consisting of nickel, copper, and gold on a woven or non-woven fabric, and on the other side. It can be attached to the electromagnetic shielding object through the formed third conductive adhesive.

The conductive gasket for strong electromagnetic wave shielding including the above-described configuration has strong durability against damage due to external force while securing electrical conductivity.

The disclosed contents are only examples, and can be variously modified by those skilled in the art without departing from the subject matter of the claims claimed in the claims, so the scope of protection of the disclosed contents is the specific It is not limited to the embodiment.

10: core
20: non-conductive adhesive
30: conductive fiber layer
40: first conductive adhesive
50: conductive surface reinforcement layer
60: second conductive adhesive
70: conductive fiber sheet
80: third conductive adhesive

Claims (8)

An elastic core;
A conductive fiber layer laminated on the outer peripheral surface of the core through a non-conductive adhesive to surround the core;
A conductive surface reinforcement layer laminated on an outer surface of the conductive fiber layer through a first conductive adhesive to surround the conductive fiber layer;
A coating layer laminated on the outer surface of the conductive surface reinforcement layer; And
A gasket comprising a conductive fiber sheet attached to a lower side of the coating layer through a second conductive adhesive and attached to a electromagnetic wave shielding object through a third conductive adhesive,
The core is formed by foaming acrylic,
The non-conductive adhesive is made of one adhesive selected from the group consisting of acrylic and urethane, or is made by mixing 30 to 200 parts by weight of ceramic with 100 parts by weight of adhesive made of acrylic and urethane,
The coating layer is made of a polyurethane resin composition containing carbon nanotubes,
The first, second and third conductive pressure-sensitive adhesive is made of at least one selected from the group consisting of nickel, copper and silver,
The conductive fiber sheet is a conductive gasket for strong electromagnetic wave shielding, characterized in that made by plating any one selected from the group consisting of nickel, copper, and gold on a woven or non-woven fabric.
delete The method according to claim 1,
The conductive fiber layer is a conductive gasket for strong electromagnetic wave shielding, characterized in that made by plating at least one selected from the group consisting of nickel, copper, and gold on a woven or nonwoven fabric.
delete The method according to claim 1,
The conductive surface reinforcement layer is a conductive gasket for strong electromagnetic shielding, characterized in that formed of a metal or conductive fiber material.
The method according to claim 5,
The metal is a conductive gasket for a strong electromagnetic shielding, characterized in that the nickel-plated copper foil or aluminum foil.
The method according to claim 5,
The conductive fiber material is a conductive gasket for strong electromagnetic wave shielding, characterized in that made by plating any one selected from the group consisting of nickel, copper and gold on a woven or non-woven fabric.
delete

Images