KR102222023B1 - Pouch for electromagnetic interference - Google Patents

Abstract

According to one embodiment of the present invention, a pouch for electromagnetic shielding comprises: a first sheet having a sheet shape; a second sheet having the sheet shape, overlapped to correspond to the first sheet, and bonded to the first sheet along a portion of an edge to form a storage space having an opening; and at least one fastening unit positioned along the remaining portion of the edge of the first sheet and the second sheet between the first sheet and the second sheet adjacent to the opening and opening or closing the opening. Each of the first sheet and the second sheet comprises: a first sheet layer containing 1-100 wt% of a polyolefin-based resin, 1-100 wt% of an electromagnetic shielding agent, 1-50 wt% of a clay compound, and 1-50 wt% of a coupling agent; a second sheet layer overlapped by the first sheet layer and made of an electrically conductive foil; a third sheet layer overlapped by the second sheet layer and containing 1-100 wt% of the polyolefin-based resin, 1-100 wt% of the electromagnetic shielding agent, 1-50 wt% of the clay compound, and 1-50 wt% of the coupling agent; and a fourth sheet layer overlapped by the third sheet layer and made of paper or polyethylene terephthalate. The first sheet layer of the first sheet and the first sheet layer of the second sheet are positioned to face each other to form an inner surface of the storage space.

Description

Pouch for electromagnetic interference {Pouch for electromagnetic interference}

The present invention relates to a pouch, and more particularly, to an electromagnetic wave shielding pouch capable of accommodating a smart device so as to stably shield electromagnetic waves.

Recently, a smart key has been applied to a vehicle, and the smart key provides convenience to the driver. The smart key communicates with the vehicle in both directions, so the driver can unlock the vehicle and even start the vehicle just by holding the smart key. In addition, the smart key is providing more functions.

On the other hand, the smart key generates a signal by itself and transmits the frequency. Here, electronic equipment readily available on the market can duplicate the frequency of the smart key by scanning a signal. When the duplicated frequency is transmitted to a terminal (eg, a smartphone, etc.), the terminal receiving the duplicated frequency acts as a smart key for the vehicle, and can unlock and start the vehicle. For this reason, vehicle theft using frequency duplication of the smart key is frequently performed, and electromagnetic wave shielding of the smart key is required. There are various problems caused by electromagnetic waves of various smart devices as well as smart keys. For example, IC chips embedded in e-passports may be forged or altered, and smart devices may operate unintentionally, interfering with meetings, performances, and exhibitions.

However, tools for shielding electromagnetic waves of smart devices that can be used individually are being developed, but they are inconvenient to carry as they are formed at a high price point. In addition, it is difficult to reliably shield the electromagnetic waves of smart devices.

The technical problem to be achieved by the electromagnetic wave shielding pouch according to the technical idea of the present invention is for electromagnetic wave shielding that is manufactured at low cost and allows smart devices (for example, smart keys, etc.) to be stably stored in a state where electromagnetic waves are blocked. It is to provide a pouch.

In addition, the technical problem to be achieved by the electromagnetic wave shielding pouch according to the technical idea of the present invention is to provide an electromagnetic wave shielding pouch that can be easily carried.

The technical problem to be achieved by the electromagnetic wave shielding pouch according to the technical idea of the present invention is not limited to the above-mentioned problem, and another problem that is not mentioned will be clearly understood by those skilled in the art from the following description.

An electromagnetic wave shielding pouch according to an embodiment according to the technical idea of the present invention includes: a first sheet having a sheet shape; A sheet-shaped second sheet overlapping to correspond to the first sheet and bonding to the first sheet along a portion of the edge to form a storage space having an opening; And at least one fastening portion positioned between the first sheet and the second sheet adjacent to the opening along the remaining portions of the edges of the first sheet and the second sheet, and capable of opening or closing the opening. have.

In addition, each of the first sheet and the second sheet is 1 part by weight to 100 parts by weight of a polyolefin resin, 1 part by weight to 100 parts by weight of an electromagnetic wave shielding agent, 1 part by weight to 50 parts by weight of a clay compound, and 1 part by weight to 50 parts by weight A first sheet layer comprising a negative coupling agent; A second sheet layer superimposed on the first sheet layer and made of an electrically conductive foil; It is superimposed on the second sheet layer and contains 1 part by weight to 100 parts by weight of a polyolefin resin, 1 part by weight to 100 parts by weight of an electromagnetic wave shielding agent, 1 part by weight to 50 parts by weight of a clay compound, and 1 part by weight to 50 parts by weight of a coupling agent. A third sheet layer; And a fourth sheet layer superimposed on the third sheet layer and made of paper or polyethylene terephthalate, wherein the first sheet layer of the first sheet and the first sheet layer of the second sheet are positioned to face each other to store space Can form the inner side of.

In addition, the fastening part may include 1 part by weight to 100 parts by weight of a polyolefin resin, 1 part by weight to 100 parts by weight of an electromagnetic wave shielding agent, 1 part by weight to 50 parts by weight of a clay compound, and 1 part by weight to 50 parts by weight of a coupling agent.

In addition, the polyolefin-based resin may include at least one of polypropylene, high density polyethylene, low density polyethylene, linear low density polyethylene, and polyamide.

In addition, the electromagnetic wave shielding agent may include at least one of ferrite, graphite, carbon black, nickel-coated carbon fiber, carbon nanotube, and nickel-coated graphite.

In addition, the clay compound may include at least one of montmorillonite, bentonite, kaolinite, kaolinite, mica, hectorite, vermiculite, and haloysite.

In addition, the coupling agent may include at least one of maleic anhydride-modified polypropylene, maleic anhydride graft high-density polyethylene, maleic anhydride graft linear low-density polyethylene, and maleic anhydride graft ethylene-vinyl acetate copolymer.

Further, the fastening portion may be coated with an electrically conductive material.

In addition, an embossing portion may be formed in the bonding area according to the bonding of the first sheet and the second sheet.

In addition, the embossing portion may be formed in a zigzag shape along the edges of the first sheet and the second sheet in the bonding area, and a plurality of auxiliary embossing portions may be formed in the embossing portion.

In addition, the electromagnetic wave shielding pouch is made of a conductive material, and is formed over a side surface of the first sheet and a side surface of the second sheet along a portion of the edge of the first sheet and a portion of the second sheet, so that the first sheet and the second sheet are formed. It may further include a side layer closed between the sheets.

The electromagnetic wave shielding pouch according to embodiments according to the technical idea of the present invention has the following effects.

(1) It can be manufactured at low cost.

(2) Smart devices can be stably stored in a state where electromagnetic waves are blocked.

(3) It can be easily carried.

However, the effects that can be achieved by the electromagnetic wave shielding pouch according to an embodiment of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description. I will be able to.

In order to more fully understand the drawings cited in this specification, a brief description of each drawing is provided.
1 is a perspective view showing an electromagnetic wave shielding pouch according to a first embodiment of the present invention.
2 is a cross-sectional view showing a pouch for shielding electromagnetic waves according to a first embodiment of the present invention.
3 is a perspective view showing an electromagnetic wave shielding pouch according to a second embodiment of the present invention.
4 is a cross-sectional view illustrating an electromagnetic wave shielding pouch according to a first embodiment of the present invention.

In the present invention, various modifications may be made and various embodiments may be provided, and specific embodiments are illustrated in the drawings, and these will be described in detail through detailed description. However, this is not intended to limit the present invention to specific embodiments, and the present invention should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

In describing the present invention, when it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, numbers (eg, first, second, etc.) used in the description of the present specification are merely identification symbols for distinguishing one component from another component.

In addition, in the present specification, when one component is referred to as "connected" or "connected" to another component, the one component may be directly connected or directly connected to the other component, but specially It should be understood that as long as there is no opposite substrate, it may be connected or may be connected via another component in the middle.

In addition, as for the constituent elements represented by'~ unit' in the present specification, two or more constituent elements may be combined into one constituent element, or one constituent element may be divided into two or more for each more subdivided function. In addition, each of the components to be described below may additionally perform some or all of the functions that other components are responsible for in addition to its own main function, and some of the main functions that each component is responsible for are different. It goes without saying that it may be performed exclusively by components.

Hereinafter, embodiments according to the technical idea of the present invention will be sequentially described in detail.

1 is a perspective view showing an electromagnetic wave shielding pouch 100 according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view showing an electromagnetic wave shielding pouch 100 according to a first embodiment of the present invention.

1 and 2, the electromagnetic wave shielding pouch 100 according to the first embodiment of the present invention includes a first sheet 101, a second sheet 102, and a fastening part 103, , A storage space 100a is formed to accommodate a smart device (eg, a smart phone, a smart key, etc.), and the opening 100b formed in the storage space 100a is closed to accommodate the storage space 100a. It is used to shield electromagnetic waves of smart devices.

The first sheet 101 is formed in a sheet shape, and includes a first sheet layer 111, a second sheet layer 113, a third sheet layer 115, and a fourth sheet layer 117. In this embodiment, the first sheet 101 is a first sheet layer 111, a second sheet layer 113, a third sheet layer 115, and a fourth sheet layer 117 in the order of stacking. Is shown as.

The second sheet 102 has a sheet shape corresponding to the first sheet 101 and is positioned to correspond to the first sheet 101. Here, the second sheet 102 also includes a first sheet layer 121, a second sheet layer 123, a third sheet layer 125, and a fourth sheet layer 127 like the first sheet 101. can do. In addition, in this embodiment, the second sheet 102 is stacked in the order of the first sheet layer 121, the second sheet layer 123, the third sheet layer 125, and the fourth sheet layer 127. It is shown to have been accomplished.

The second sheet 102 may be stacked to correspond to the first sheet 101. The first sheet layer 121 of the second sheet 102 and the first sheet layer 111 of the first sheet 101 may be positioned to face each other. Here, the second sheet 102 is bonded to the first sheet 101 along a part of the edge of the first sheet 101, and the opening 100b between the first sheet 101 and the second sheet 102 A storage space 100a having a may be formed. The first sheet layer 121 of the second sheet 102 and the first sheet layer 111 of the first sheet 101 form the inner side of the storage space 100a, and the second sheet 102 The 4 sheet layer 127 and the fourth sheet layer 117 of the first sheet 101 may form an outer surface of the electromagnetic wave shielding pouch 100. In addition, a bonding region A may be formed at a portion of the edge of the first sheet 101 and a portion of the edge of the second sheet 102 according to bonding of the first sheet 101 and the second sheet 102.

The smart device may be inserted and accommodated in the storage space 100a through the opening 100b. Meanwhile, the smart device accommodated in the storage space 100a may be discharged from the storage space 100a through the opening 100b.

An embossed portion 100c may be formed in the bonding area A. Here, the embossing portion 100c is formed along the edges of the first sheet 101 and the second sheet 102, and may be formed in a plurality so as to be parallel to each other. In this embodiment, the embossing portion 100c is formed concave in the fourth sheet layer 127 side in the second sheet 102 and convexly formed in the first sheet layer 121 side, and the first sheet 101 In the first sheet layer 111 is formed concave on the side and is formed to be convex on the fourth sheet layer 117 side. In particular, the convex portion of the second sheet 102 is inserted into the concave portion of the first sheet 101. For this reason, a minute gap between the first sheet 101 and the second sheet 102 in the bonding region A may be closed by the embossing portion 100c. That is, the bonding area A blocks the inside and the outside of the storage space 100a in combination with the embossing portion 100c.

Further, the first sheet 101 and the second sheet 102 have substantially the same configuration. In particular, in the first sheet 101 and the second sheet 102, the first sheet layer 111 and the first sheet layer 121 are each 1 part by weight to 100 parts by weight of a polyolefin resin, 1 part by weight to 100 parts by weight Part of the electromagnetic shielding agent, 1 part by weight to 50 parts by weight of a clay compound, and 1 part by weight to 50 parts by weight of a coupling agent (coupling agent) may be included.

Here, the polyolefin resin is polypropylene, high density polyethylene (HDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), and polyamide. It may include at least one. These polyolefin resins may have relatively high heat resistance, chemical resistance, and warpage.

In addition, the electromagnetic wave shielding agent includes at least one of ferrite, graphite, carbon black, nickel-coated carbon fiber (NiCF), carbon nanotubes, and nickel-coated graphite. can do. Such an electromagnetic wave shielding agent has relatively high thermal conductivity and electrical conductivity, and can provide electromagnetic wave shielding performance.

Clay compounds include at least one of montmorillonite, bentonite, kaolinite, kalinite, mica, hectorite, vermiculite, and halloysite. can do. These clay compounds have relatively high heat resistance and may have relatively high resistance to corrosive solutions. In particular, the clay compound may contribute to the efficient dispersion of the electromagnetic wave shielding agent as a nanomaterial.

The coupling agent may include at least one of maleic anhydride-modified polypropylene, maleic anhydride graft high-density polyethylene, maleic anhydride graft linear low-density polyethylene, and maleic anhydride graft ethylene-vinyl acetate copolymer. Such a coupling agent can improve the bonding strength of the polyolefin-based resin, the electromagnetic wave shielding agent, and the clay compound mentioned above.

In addition, in the first sheet 101 and the second sheet 102, the second sheet layer 113 and the second sheet layer 123 are superposed on the first sheet layer 111 and the first sheet layer 121, respectively. It is located. Here, the second sheet layer 113 and the second sheet layer 123 are made of a material having relatively high electrical conductivity, such as aluminum, silver, copper, nickel, or the like, and may have a shape of a foil.

In addition, in the first sheet 101 and the second sheet 102, the third sheet layer 115 and the third sheet layer 125 are superimposed on the second sheet layer 113 and the second sheet layer 123, respectively. It is located. Here, the third sheet layer 115 and the third sheet layer 125 are the same as the first sheet layers 111 and 121. That is, the third sheet layer 115 and the third sheet layer 125 are each 1 part by weight to 100 parts by weight of a polyolefin resin, 1 part by weight to 100 parts by weight of an electromagnetic wave shielding agent, 1 part by weight to 50 parts by weight of a clay compound, and It may contain 1 part by weight to 50 parts by weight of a coupling agent.

In the first sheet 101 and the second sheet 102, the fourth sheet layer 117 and the fourth sheet layer 127 are positioned superimposed on the third sheet layer 115 and the third sheet layer 125, respectively. do. The fourth sheet layer 117 and the fourth sheet layer 127 may be made of paper or polyethylene terephthalate (PET). It may be preferable that the fourth sheet layer 117 and the fourth sheet layer 127 are made of polyethylene terephthalate having relatively high durability to form the outer surface of the electromagnetic wave shielding pouch 100, respectively.

The fastening part 103 is positioned along the rest of the edges of the first sheet 101 and the second sheet 102 between the first sheet 101 and the second sheet 102 adjacent to the opening 100b. It is coupled to the first sheet 101 and the second sheet 102. Here, the fastening part 103 may be used to open or close the opening 100b.

In this embodiment, the fastening part 103 is a fastening concave part 131 and a second sheet formed along the remaining part of the edge of the first sheet 101 in the first sheet layer 111 of the first sheet 101. The first sheet layer 121 of 102 may include a fastening convex portion 133 positioned to correspond to the fastening concave portion 131 and into which the fastening concave portion 131 may be inserted. When the fastening convex part 133 is inserted into and coupled to the fastening concave part 131, the opening 100b may be closed so that the storage space 100a may be sealed. On the other hand, when the fastening convex part 133 is separated from the fastening concave part 131, the opening 100b may be opened so that the storage space 100a may also be opened. In some cases, the fastening concave part 131 is located along the remaining part of the edge of the second sheet 102 in the first sheet layer 121 of the second sheet 102, and the fastening convex part 133 is 1 It may be positioned to correspond to the fastening recess 131 in the first sheet layer 111 of the sheet 101.

The fastening part 103 may be formed in the same manner as the first sheet layers 111 and 121 and the third sheet layers 115 and 125. That is, the fastening part 103 includes 1 part by weight to 100 parts by weight of a polyolefin resin, 1 part by weight to 100 parts by weight of an electromagnetic wave shielding agent, 1 part by weight to 50 parts by weight of a clay compound, and 1 part by weight to 50 parts by weight of a coupling agent. Can include. Meanwhile, the fastening part 103 may be coated with a material having relatively high electrical conductivity such as aluminum, silver, copper, nickel, or the like. For this reason, the fastening part 103 may provide electrical conductivity to provide electromagnetic wave shielding performance by itself.

The fastening part 103 of this embodiment is illustrated as being made of one, but is not limited thereto, and may be made of a plurality of and spaced apart so as to be parallel to each other.

The electromagnetic shielding pouch 100 according to the present embodiment includes a first sheet 101, a second sheet 102, and a fastening portion 103. Here, the first sheet 101 and the second sheet 102 include a first sheet layer including a polyolefin resin, an electromagnetic wave shielding agent, a clay compound, and a coupling agent, respectively; A second sheet layer made of an electrically conductive foil; A third sheet layer containing a polyolefin resin, an electromagnetic wave shielding agent, a clay compound, and a coupling agent; And a fourth sheet layer made of paper or polyethylene terephthalate, and are bonded to each other to form a storage space 100a having an opening 100b. In addition, the fastening portion 103 includes a polyolefin-based resin, an electromagnetic wave shielding agent, a clay compound, and a coupling agent, and between the first sheet 101 and the second sheet 102 adjacent to the opening 100b, the first sheet 101 ) And the second sheet 102, and may be used to open or close the opening 100b. The first sheet 101, the second sheet 102, and the fastening part 103 can shield electromagnetic waves by themselves due to the above configuration, and the smart device can be used as the first sheet 101 in the storage space 100a. , It may be sealed by the second sheet 102 and the fastening part 103 to be kept in a state of being shielded from electromagnetic waves. Accordingly, the electromagnetic shielding pouch 100 according to the present embodiment can stably store the smart device in an electromagnetic shielded state.

On the other hand, when the smart device is an electromagnetic wave shielded by the electromagnetic wave shielding pouch 100, when the smart device is a smart key, the smart key does not leak electromagnetic waves to the outside of the electromagnetic wave shielding pouch 100 and is used for electromagnetic wave shielding. The frequency of the smart key may not be identified outside the pouch 100. Accordingly, the electromagnetic wave shielding pouch 100 can prevent vehicle theft using the duplicated frequency by replicating the frequency of the smart key from the outside.

The electromagnetic wave shielding pouch 100 according to the present embodiment may prevent hacking of a smart device that is sealed by being accommodated in the storage space 100a by shielding electromagnetic waves for various smart devices as well as a smart key. In addition, smart devices may not operate unintentionally and interfere with meetings, performances, and exhibitions. In addition, the electronic passport may be accommodated and sealed in the storage space 100a of the electromagnetic wave shielding pouch 100. Since the electromagnetic wave is shielded, the IC chip embedded in the electronic passport may not be forged or altered.

In addition, in the electromagnetic wave shielding pouch 100 of the present embodiment, the first sheet 101 and the second sheet 102 may have a sheet shape and may be folded. In addition, since the first sheet 101 and the second sheet 102 form a storage space 100a by bonding some of the edges, the electromagnetic wave shielding pouch 100 of the present embodiment can be manufactured in large quantities and at low cost. It is manufactured for single use and can be distributed in places where conferences, performances, and exhibitions are held. In addition, the electromagnetic wave shielding pouch 100 can be folded without accommodating a smart device, and thus can be easily carried.

Meanwhile, the electromagnetic wave shielding pouch 100 according to the present embodiment may further include a side layer 104. The side layer 104 may be formed over a side surface of the first sheet 101 and a side surface of the second sheet 102 along a portion of the edge of the first sheet 101 and a portion of the edge of the second sheet 102. . A minute gap between the first sheet 101 and the second sheet 102 bonded to each other may be closed by the side layer 104. Here, the side layer 104 may be formed by coating a material having a relatively high electrical conductivity, such as aluminum, silver, copper, nickel, etc., over the side surfaces of the first sheet 101 and the side surfaces of the second sheet 102. have. For this reason, the side layer 104 can improve electromagnetic wave shielding in the storage space 100a.

3 is a perspective view showing an electromagnetic wave shielding pouch 300 according to a second embodiment of the present invention, and FIG. 4 is a cross-sectional view showing an electromagnetic wave shielding pouch 300 according to a second embodiment of the present invention.

3 and 4, the electromagnetic wave shielding pouch 300 according to the second embodiment of the present invention includes a first sheet 301, a second sheet 302, and a fastening part 303, , A storage space 300a is formed to accommodate a smart device (eg, a smart phone, a smart key, etc.), and the opening 300b formed in the storage space 300a is closed to accommodate the storage space 300a. It is used to shield electromagnetic waves of smart devices.

The first sheet 301 is formed in a sheet shape, and includes a first sheet layer 311, a second sheet layer 313, a third sheet layer 315, and a fourth sheet layer 317. In this embodiment, the first sheet 301 is a first sheet layer 311, a second sheet layer 313, a third sheet layer 315, and a fourth sheet layer 317 are stacked in order. Is shown as.

The second sheet 302 has a sheet shape corresponding to the first sheet 301 and is positioned to correspond to the first sheet 301. Here, the second sheet 302 also includes a first sheet layer 321, a second sheet layer 323, a third sheet layer 325, and a fourth sheet layer 327, like the first sheet 301 can do. In addition, in this embodiment, the second sheet 302 is stacked in the order of the first sheet layer 321, the second sheet layer 323, the third sheet layer 325, and the fourth sheet layer 327. It is shown to have been accomplished.

The second sheet 302 may be overlapped to correspond to the first sheet 301. The first sheet layer 321 of the second sheet 302 and the first sheet layer 311 of the first sheet 301 may be positioned to face each other. Here, the second sheet 302 is bonded to the first sheet 301 along a part of the edge of the first sheet 301, and there is an opening 300b between the first sheet 301 and the second sheet 302. A storage space 300a having a may be formed. The first sheet layer 321 of the second sheet 302 and the first sheet layer 311 of the first sheet 301 form the inner side of the storage space 300a, and The 4 sheet layer 327 and the fourth sheet layer 317 of the first sheet 301 may form an outer surface of the electromagnetic wave shielding pouch 300. In addition, a bonding region A may be formed at a portion of the edge of the first sheet 301 and a portion of the edge of the second sheet 302 according to bonding of the first sheet 301 and the second sheet 302.

The smart device may be inserted and accommodated in the storage space 300a through the opening 300b. Meanwhile, the smart device accommodated in the storage space 300a may be discharged from the storage space 300a through the opening 300b.

An embossing portion 300c may be formed in the bonding area A. Here, the embossing part 300c is formed along the edges of the first sheet 301 and the second sheet 302, and may be formed in plural so as to be parallel to each other. In this embodiment, the embossing portion 300c is formed to be concave at the side of the fourth sheet layer 327 in the second sheet 302 and convex at the side of the first sheet layer 321, and the first sheet 301 In the first sheet layer 311 side, it is concavely formed and the fourth sheet layer 317 side is convexly formed. In particular, the convex portion of the second sheet 302 is inserted into the concave portion of the first sheet 301. For this reason, a minute gap between the first sheet 301 and the second sheet 302 in the bonding region A may be closed by the embossing portion 300c. That is, the bonding area A blocks the inside and the outside of the storage space 300a in combination with the embossing part 300c.

In particular, the embossing portion 300c of this embodiment may be formed in a zigzag shape along the edges of the first sheet 301 and the second sheet 302 in the bonding area A, and a plurality of auxiliary embossing portions 300c' ) May be formed on the embossing portion 300c. Accordingly, the embossing unit 300c may increase an area blocking the interior and exterior of the storage space 300a. Shielding of electromagnetic waves of smart devices accommodated in the storage space 300a may be improved.

Further, the first sheet 301 and the second sheet 302 have substantially the same configuration. In particular, in the first sheet 301 and the second sheet 302, the first sheet layer 311 and the first sheet layer 321 are each 1 part by weight to 100 parts by weight of a polyolefin resin, 1 part by weight to 100 parts by weight Part of the electromagnetic shielding agent, 1 part by weight to 50 parts by weight of a clay compound, and 1 part by weight to 50 parts by weight of a coupling agent (coupling agent) may be included.

Here, the polyolefin resin is polypropylene, high density polyethylene (HDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), and polyamide. It may include at least one. These polyolefin resins may have relatively high heat resistance, chemical resistance, and warpage.

In addition, the electromagnetic wave shielding agent includes at least one of ferrite, graphite, carbon black, nickel-coated carbon fiber (NiCF), carbon nanotubes, and nickel-coated graphite. can do. Such an electromagnetic wave shielding agent has relatively high thermal conductivity and electrical conductivity, and can provide electromagnetic wave shielding performance.

Clay compounds include at least one of montmorillonite, bentonite, kaolinite, kalinite, mica, hectorite, vermiculite, and halloysite. can do. These clay compounds have relatively high heat resistance and may have relatively high resistance to corrosive solutions. In particular, the clay compound may contribute to the efficient dispersion of the electromagnetic wave shielding agent as a nanomaterial.

The coupling agent may include at least one of maleic anhydride-modified polypropylene, maleic anhydride graft high-density polyethylene, maleic anhydride graft linear low-density polyethylene, and maleic anhydride graft ethylene-vinyl acetate copolymer. Such a coupling agent can improve the bonding strength of the polyolefin-based resin, the electromagnetic wave shielding agent, and the clay compound mentioned above.

In addition, in the first sheet 301 and the second sheet 302, the second sheet layer 313 and the second sheet layer 323 are overlapped on the first sheet layer 311 and the first sheet layer 321, respectively. It is located. Here, the second sheet layer 313 and the second sheet layer 323 are made of a material having relatively high electrical conductivity, such as aluminum, silver, copper, nickel, or the like, and may have a shape of a foil.

In addition, in the first sheet 301 and the second sheet 302, the third sheet layer 315 and the third sheet layer 325 are superimposed on the second sheet layer 313 and the second sheet layer 323, respectively. It is located. Here, the third sheet layer 315 and the third sheet layer 325 are the same as the first sheet layers 311 and 321. That is, the third sheet layer 315 and the third sheet layer 325 are each 1 part by weight to 100 parts by weight of a polyolefin resin, 1 part by weight to 100 parts by weight of an electromagnetic wave shielding agent, 1 part by weight to 50 parts by weight of a clay compound, and It may contain 1 part by weight to 50 parts by weight of a coupling agent.

In the first sheet 301 and the second sheet 302, the fourth sheet layer 317 and the fourth sheet layer 327 are overlapped on the third sheet layer 315 and the third sheet layer 325, respectively. do. The fourth sheet layer 317 and the fourth sheet layer 327 may be made of paper or polyethylene terephthalate (PET). The fourth sheet layer 317 and the fourth sheet layer 327 may preferably be made of polyethylene terephthalate having relatively high durability to form the outer surface of the electromagnetic wave shielding pouch 300, respectively.

The fastening part 303 is positioned along the rest of the edges of the first sheet 301 and the second sheet 302 between the first sheet 301 and the second sheet 302 adjacent to the opening 300b. It is coupled to the first sheet 301 and the second sheet 302. Here, the fastening part 303 may be used to open or close the opening 300b.

In this embodiment, the fastening part 303 is a fastening concave part 331 and a second sheet formed along the rest of the edge of the first sheet 301 in the first sheet layer 311 of the first sheet 301. The first sheet layer 321 of 302 may include a fastening convex part 333 which is positioned to correspond to the fastening concave part 331 and into which the fastening concave part 331 can be inserted. When the fastening convex part 333 is inserted into the fastening concave part 331 and coupled, the opening 300b is closed so that the storage space 300a may be sealed. On the other hand, when the fastening convex part 333 is separated from the fastening concave part 331, the opening 300b may be opened so that the storage space 300a may also be opened. In some cases, the fastening concave part 331 is located along the remaining part of the edge of the second sheet 302 in the first sheet layer 321 of the second sheet 302, and the fastening convex part 333 is It may be positioned to correspond to the fastening recess 331 in the first sheet layer 311 of the 1 sheet 301.

The fastening part 303 may be formed in the same manner as the first sheet layers 311 and 321 and the third sheet layers 315 and 325. That is, the fastening part 303 includes 1 part by weight to 100 parts by weight of a polyolefin resin, 1 part by weight to 100 parts by weight of an electromagnetic wave shielding agent, 1 part by weight to 50 parts by weight of a clay compound, and 1 part by weight to 50 parts by weight of a coupling agent. Can include.

Meanwhile, the fastening part 303 may be coated with a material having relatively high electrical conductivity such as aluminum, silver, copper, nickel, or the like. For this reason, the fastening part 303 may provide electrical conductivity to provide electromagnetic wave shielding performance by itself.

The fastening part 303 of the present embodiment is illustrated as being made of one, but is not limited thereto, and may be made of a plurality of and spaced apart so as to be parallel to each other. Meanwhile, the fastening part 303 may be formed in a zigzag shape along the remaining portions of the edges of the first sheet 301 and the second sheet 302. Accordingly, the fastening portion 303 may increase an area blocking the interior and exterior of the storage space 300a. Shielding of electromagnetic waves of smart devices accommodated in the storage space 300a may be improved.

The electromagnetic wave shielding pouch 300 of the present embodiment includes a first sheet 301, a second sheet 302, and a fastening portion 303. Here, the first sheet 301 and the second sheet 302 include a first sheet layer including a polyolefin resin, an electromagnetic wave shielding agent, a clay compound, and a coupling agent, respectively; A second sheet layer made of an electrically conductive foil; A third sheet layer containing a polyolefin resin, an electromagnetic wave shielding agent, a clay compound, and a coupling agent; And a fourth sheet layer made of paper or polyethylene terephthalate, and are bonded to each other to form a storage space 300a having an opening 300b. In addition, the fastening portion 303 includes a polyolefin-based resin, an electromagnetic wave shielding agent, a clay compound, and a coupling agent, and between the first sheet 301 and the second sheet 302 adjacent to the opening 300b, the first sheet 301 ) And the second sheet 302, and may be used to open or close the opening 300b. The first sheet 301, the second sheet 302, and the fastening part 303 can shield electromagnetic waves by themselves due to the above configuration, and the smart device can be used as the first sheet 301 in the storage space 300a. , It may be sealed by the second sheet 302 and the fastening part 303 to be kept in a state of being shielded from electromagnetic waves. Accordingly, the electromagnetic wave shielding pouch 300 of the present embodiment can stably store the smart device in a state where electromagnetic waves are blocked.

In addition, in the electromagnetic wave shielding pouch 300 of the present embodiment, the first sheet 301 and the second sheet 302 may have a sheet shape and may be folded. In addition, since the first sheet 301 and the second sheet 302 form a storage space 300a by bonding some of the edges, the electromagnetic wave shielding pouch 300 of the present embodiment can be manufactured at low cost in large quantities. It is manufactured for single use and can be distributed in places where conferences, performances, and exhibitions are held. In addition, the electromagnetic wave shielding pouch 300 can be folded without accommodating a smart device, and thus can be easily carried.

Meanwhile, the electromagnetic wave shielding pouch 300 according to the present embodiment may further include a side layer 304. The side layer 304 may be formed over a side surface of the first sheet 301 and a side surface of the second sheet 302 along a portion of the edge of the first sheet 301 and a portion of the edge of the second sheet 302. . The minute gap between the first sheet 301 and the second sheet 302 bonded to each other may be closed by the side layer 304. Here, the side layer 304 may be formed by coating a material having a relatively high electrical conductivity, such as aluminum, silver, copper, nickel, etc. over the side surfaces of the first sheet 301 and the side surfaces of the second sheet 302. have. For this reason, the side layer 304 can improve electromagnetic wave shielding in the storage space 300a.

Above, the technical idea of the present invention has been described in detail with reference to preferred embodiments, but the technical idea of the present invention is not limited to the above embodiments, and those skilled in the art within the scope of the technical idea Various modifications and changes are possible by the user.

100, 300: electromagnetic wave shielding pouch
101, 301: first sheet
102, 302: second sheet
103, 303: fastening part
104, 304: side layer

Claims (10)

A sheet-shaped first sheet;
A sheet-shaped second sheet overlapping to correspond to the first sheet and bonding to the first sheet along a portion of the edge to form a storage space having an opening; And
At least one fastening portion positioned between the first sheet and the second sheet adjacent to the opening along the remaining portions of the edges of the first sheet and the second sheet, and capable of opening or closing the opening,
Each of the first sheet and the second sheet,
A first sheet layer comprising 1 to 100 parts by weight of a polyolefin resin, 1 to 100 parts by weight of an electromagnetic wave shielding agent, 1 to 50 parts by weight of a clay compound, and 1 to 50 parts by weight of a coupling agent;
A second sheet layer superimposed on the first sheet layer and made of an electrically conductive foil;
It is superimposed on the second sheet layer and contains 1 part by weight to 100 parts by weight of a polyolefin resin, 1 part by weight to 100 parts by weight of an electromagnetic wave shielding agent, 1 part by weight to 50 parts by weight of a clay compound, and 1 part by weight to 50 parts by weight of a coupling agent. A third sheet layer; And
It is superimposed on the third sheet layer and includes a fourth sheet layer made of paper or polyethylene terephthalate,
Electromagnetic wave shielding pouch, characterized in that the first sheet layer of the first sheet and the first sheet layer of the second sheet are positioned to face each other to form an inner side surface of the storage space.
The method of claim 1,
The fastening part comprises 1 part by weight to 100 parts by weight of a polyolefin resin, 1 part by weight to 100 parts by weight of an electromagnetic wave shielding agent, 1 part by weight to 50 parts by weight of a clay compound, and 1 part by weight to 50 parts by weight of a coupling agent. Shielding pouch.
The method according to claim 1 or 2,
The polyolefin-based resin includes at least one of polypropylene, high-density polyethylene, low-density polyethylene, linear low-density polyethylene, and polyamide.
The method according to claim 1 or 2,
Electromagnetic wave shielding pouch, characterized in that it comprises at least one of ferrite, graphite, carbon black, nickel-coated carbon fiber, carbon nanotubes, and nickel-coated graphite.
The method according to claim 1 or 2,
The clay compound is an electromagnetic wave shielding pouch comprising at least one of montmorillonite, bentonite, kaolinite, kaolinite, mica, hectorite, vermiculite and haloysite.
The method according to claim 1 or 2,
The coupling agent includes at least one of maleic anhydride-modified polypropylene, maleic anhydride graft high density polyethylene, maleic anhydride graft linear low density polyethylene, and maleic anhydride graft ethylene-vinyl acetate copolymer.
The method of claim 1,
Electromagnetic wave shielding pouch, characterized in that the fastening portion is coated with an electrically conductive material.
The method of claim 1,
Electromagnetic wave shielding pouch, characterized in that the embossing portion is formed in the bonding area according to the bonding of the first sheet and the second sheet.
The method of claim 8,
The embossing portion is formed in a zigzag shape along the edges of the first sheet and the second sheet in the bonding area, and a plurality of auxiliary embossing portions are formed in the embossing portion.
The method of claim 1, wherein the electromagnetic wave shielding pouch,
A side layer made of a conductive material, formed over a side surface of the first sheet and a side surface of the second sheet along a part of the edge of the first sheet and a part of the edge of the second sheet, and closed between the first sheet and the second sheet. Electromagnetic wave shielding pouch, characterized in that it further comprises.

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