KR200460259Y1 - Case of Portable Terminal with Function of Schielding Electromagnetic Wave and Radiating Heat - Google Patents

Abstract

The present invention is a portable terminal case having an electromagnetic shielding and heat dissipation function, in more detail (a) portable terminal protective case; And (b) a graphene laminated film having a three-layer structure attached to and detached from a side surface of the portable terminal protective case, wherein the graphene laminated film comprises an adhesive sheet layer; A graphene sheet layer formed on the adhesive sheet layer; And a cover sheet layer formed on the graphene sheet layer, or a portable terminal case having electromagnetic shielding and heat dissipation functions manufactured by insert injection molding a graphene sheet. will be. The portable terminal case of the present invention has excellent electromagnetic wave shielding and heat dissipation effect, which can prevent damage to human body due to electromagnetic waves and heat, and is a mobile phone, smart phone, electronic dictionary, navigation, notebook computer, digital broadcasting terminal, PDA (Personal Digital). It can be used for various portable terminals such as Assistants or Portable Multimedia Player (PMP).

Description

Case of Portable Terminal with Function of Schielding Electromagnetic Wave and Radiating Heat

The present invention is a portable terminal case having an electromagnetic shielding and heat dissipation function, in more detail (a) portable terminal protective case; And (b) a graphene laminated film having a three-layer structure attached to and detached from a side surface of the portable terminal protective case, wherein the graphene laminated film comprises an adhesive sheet layer; A graphene sheet layer formed on the adhesive sheet layer; And a cover sheet layer formed on the graphene sheet layer, or a portable terminal case having electromagnetic shielding and heat dissipation functions manufactured by insert injection molding a graphene sheet. will be.

Conventionally, a case is manufactured by injecting PC / ABS blending and ABS material from a thermoplastic resin as a method of blocking electromagnetic waves generated in a portable terminal, and coating a metallic material having excellent conductivity to the case to block electromagnetic waves. Was produced.

In order to manufacture a portable terminal case coated with such a conductive material, it is inevitable to develop and use a highly conductive material to reduce the malfunction of the portable terminal by blocking electromagnetic waves. As the driving voltage of is lowered, more coating of the shielding material should be applied to give an electromagnetic shielding effect, and the product price has been increased due to the defective rate generated in the conductive material coating process of the portable terminal case.

In addition, there is a phenomenon that secondary electromagnetic interference occurs in adjacent parts due to electromagnetic shielding, so that manpower and time should be additionally allocated in the manufacturing process, such as installing a shielding film between parts. By inserting into the product, there was a rise in product prices due to a rise in manufacturing cost and a defective rate.

In addition, as a material for blocking electromagnetic waves, a material that has good electrical conductivity such as silver (Ag) is used.Because of the miniaturization of the portable terminal and the lowering of the driving voltage, the blocking film is treated with more conductive material. Because of this, the price of the product and the limitation of the quality were shown.

In addition, the existing portable terminal focuses only on the prevention of malfunction of the terminal, and it may cause a bad effect on the human body of the portable terminal user if it is used for a long time without considering the shielding of the electromagnetic wave emitted from the portable terminal.

On the other hand, the heat generated inside the portable terminal has caused a lot of inconvenience. In addition, a paper has been reported that the heat generated from the cell phone can cause brain cancer.

Therefore, it is necessary to block the electromagnetic waves generated in the portable terminal and develop a portable terminal case having a heat dissipation function.

The present invention is designed to solve the problems of the conventional portable terminal as described above, an object of the present invention is to provide a portable terminal case having a function of blocking and radiating the electromagnetic waves.

Other objects and advantages of the present invention will become apparent from the following detailed description, claims, and drawings.

The present invention (a) a portable terminal protective case; And (b) a graphene laminated film 20 having a three-layer structure attached to and detached from a side surface of the portable terminal protective case, wherein the graphene laminated film comprises an adhesive sheet layer 21; A graphene sheet layer 22 formed on the adhesive sheet layer; And a cover sheet layer 23 formed on the graphene sheet layer.

In another preferred embodiment, the portable terminal protective case is injection-molded a synthetic resin or rubber resin selected from the group consisting of polycarbonate (PC), acrylonitrile butadiene styrene (ABS) and PC / ABS blending Is formed.

In another preferred embodiment, the synthetic resin or rubber resin further comprises graphene.

In addition, the present invention provides a portable terminal case having an electromagnetic shielding and heat dissipation function manufactured by insert injection molding a graphene sheet (graphene sheet).

In a preferred embodiment, the injection resin liquid for injection molding further includes graphene.

In another preferred embodiment, the portable terminal case comprises an adhesive sheet layer 21; A graphene sheet layer 22 formed on the adhesive sheet layer; And a graphene laminated film 20 having a three-layer structure including a cover sheet layer 23 formed on the graphene sheet layer, wherein the graphene laminated film 20 It is attached to the side of the portable terminal case through the adhesive sheet layer 21 is provided.

In another preferred embodiment, the pressure sensitive adhesive sheet layer 21 includes an acrylic pressure sensitive adhesive, a rubber pressure sensitive adhesive and a polyol composition.

As yet another preferred embodiment, the cover sheet layer 23 is polyethylene terephthalate (PET), polycarbonate (PC), polyvinyl chloride (PVC), polyurethane (polyurethane, PU) , Acrylonitrile butadiene styrene (ABS), and a mixture of these.

The present invention is a portable terminal case having an electromagnetic shielding and heat dissipation function, in more detail (a) portable terminal protective case; And (b) a graphene laminated film having a three-layer structure attached to and detached from a side surface of the portable terminal protective case, wherein the graphene laminated film comprises an adhesive sheet layer; A graphene sheet layer formed on the adhesive sheet layer; And a cover sheet layer formed on the graphene sheet layer, or a portable terminal case having electromagnetic shielding and heat dissipation functions manufactured by insert injection molding a graphene sheet. will be. The portable terminal case of the present invention has excellent electromagnetic wave shielding and heat dissipation effect, which can prevent damage to human body due to electromagnetic waves and heat, and is a mobile phone, smart phone, electronic dictionary, navigation, notebook computer, digital broadcasting terminal, PDA (Personal Digital) It can be used for various portable terminals such as Assistants or Portable Multimedia Player (PMP).

1 shows a product photograph of a portable terminal case according to an embodiment of the present invention.
2 is a cross-sectional view of a graphene laminated film of a three-layer structure detachable to a portable terminal protective case according to the present invention.
Figure 3 is a photograph of the product taken in the cover sheet layer of a graphene (graphene) laminated film of a three-layer structure detachable to the side of the portable terminal protective case according to the present invention.
Figure 4 is a photograph of the product taken in the adhesive sheet layer of the graphene (graphene) laminated film of the three-layer structure detachable to the side of the portable terminal protective case according to the present invention.
Figure 5 is a schematic diagram showing a process of insert injection molding using a graphene sheet (graphene sheet) according to another embodiment of the present invention.
6 is a photograph showing a heat generating effect of a portable terminal case and a portable terminal case which does not include a graphene sheet manufactured according to an embodiment of the present invention.
7 is a photograph showing the results of thermal infrared imaging of heat generated in a mobile phone (before) using a mobile terminal case according to the present invention and a mobile phone (after) using the mobile terminal case according to the present invention.

Hereinafter, the portable terminal case of the present invention will be described in detail with reference to the drawings. The embodiments described below are only for explaining the present invention in more detail, and the scope of the present invention is provided in these embodiments. It is not limited.

1 shows a product picture of a portable terminal case according to an embodiment of the present invention, Figure 2 is a cross-sectional view of a graphene (graphene) laminated film of a three-layer structure detachable to the side of the portable terminal protective case according to the present invention 3 and 4 show product photographs of a graphene laminated film having a three-layer structure.

As can be seen in Figures 1 and 2, the portable terminal case having electromagnetic shielding and heat dissipation function is largely (a) a portable terminal protective case; And (b) a graphene laminated film 20 having a three-layer structure attached to and detached from a side surface of the portable terminal protective case.

The portable terminal protective case is formed by injection molding a synthetic resin or rubber resin selected from the group consisting of polycarbonate (PC), acrylonitrile butadiene styrene (ABS) and PC / ABS blending, and more preferably. Preferably, the synthetic resin or rubber resin further includes graphene.

The portable terminal protective case is injecting the synthetic resin or rubber resin into a portable terminal protective case-type mold using an injection molding machine, and by injection to produce a portable terminal protective case.

In a preferred embodiment, the injection conditions of the injection machine are injection in the temperature range of 180-315 ° C., mold temperature 60-125 ° C., screw speed 30-110 rpm and injection pressure 400-1200 kg / mm 2 in the injection machine.

In another preferred embodiment, when the portable terminal protective case is manufactured, the synthetic resin or rubber resin further includes graphene, and is injected into the portable terminal protective case type mold using an injection machine, and the injection condition is 180-315 ° C. in the injection machine. , A mold temperature of 60-125 ° C., a screw speed of 30-110 rpm, and an injection pressure of 400-1200 kg / mm 2 were prepared to manufacture a portable terminal protective case.

When the graphene is additionally included, 10-50 parts by weight of graphene is included based on 100 parts by weight of the synthetic resin or rubber resin.

When the graphene has the above content, the graphene has a synergistic electromagnetic wave blocking and heat dissipation effect with the graphene laminated film 20 having a three-layer structure to be described later.

In addition, the portable terminal case having an electromagnetic shielding and heat dissipation function according to another embodiment of the present invention is manufactured by insert injection molding a graphene sheet (graphene sheet).

5 is a schematic diagram showing a process of insert injection molding using a graphene sheet.

Specifically, insert injection molding (a) preparing a film for insert injection of the graphene sheet; (b) forming the insert injection film; (c) trimming a cutting edge of the formed insert injection film; And (d) mounting the trimmed insert injection film into a mold and then injecting an injection resin solution to obtain an integrated injection molded product.

Insert injection film is provided to have a suitable thickness according to the size of the product, it is preferably provided in the case of a small mobile products of about 150㎛ or less, in the case of medium / large products it is preferably provided in about 120㎛ or more.

The (b) forming step is a step of forming by using a hot forming method to be provided with a three-dimensional shape (3D) requiring a film for insert injection through a press die or vacuum molding.

In the case of using such a press mold or vacuum molding, a separate heating device for heating the insert injection film may be provided and heated to an appropriate temperature according to the thickness of the graphene film.

The trimming step (c) is a step of cutting an unnecessary edge portion of the insert injection film preformed through forming by pressing or laser processing.

The injection molding step (d) is a step of obtaining a molded article in which a film and an injection molded product are integrated by inserting a film for injection molding which is formed and trimmed in an injection molding mold and then injecting an injection resin solution into the mold.

In a preferred embodiment, the injection resin liquid for injection molding includes a synthetic resin or rubber resin, more preferably further includes graphene.

When the graphene is additionally included, 10-50 parts by weight of graphene is included with respect to 100 parts by weight of the synthetic resin or rubber resin.

When graphene has the above content, it has a synergistic electromagnetic wave blocking and heat dissipation effect with the graphene sheet.

Referring to Figure 2, the graphene (graphene) laminated film 20 of the three-layer structure used in the present invention is detachable to the side of the portable terminal protective case, the graphene laminated film is an adhesive sheet (adhesive sheet) layer (21); A graphene sheet layer 22 formed on the adhesive sheet layer; And a cover sheet layer 23 formed on the graphene sheet layer, and is attached to and detached from a side surface of the portable terminal protective case through the adhesive sheet layer.

The graphene laminated film 20 having the three-layer structure includes a graphene sheet layer 22 and a cover sheet layer 23 on an adhesive sheet layer 21. In this order, that is, the adhesive sheet layer 21 and the cover sheet layer 23 are disposed on the lower surface of the graphene sheet layer 22 based on the graphene sheet layer 22. It has a symmetrical structure.

The adhesive sheet layer 21 imparts an adhesive force so that the adhesive sheet layer 21 may be attached to the side surface of the portable terminal protective case.

The pressure sensitive adhesive sheet forming the pressure sensitive adhesive sheet layer 21 includes an acrylic pressure sensitive adhesive, a rubber pressure sensitive adhesive and a polyol composition.

The acrylic pressure-sensitive adhesive methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, normal butyl methacrylate, normal butyl methyl methacrylate, acrylic acid, methacrylic acid, itaconic acid, hydroxyethyl methacrylate, hydride Roxypropyl methacrylate, hydroxyethyl acrylate, acrylamide, metyrolacrylamide, glycidyl methacrylate, ethyl acrylate, isobutyl acrylate, normal butyl acrylate, 2-ethylhexyl acrylate polymer, copolymer Or acrylic resins such as terpolymers and acrylic esters.

To the acrylic pressure-sensitive adhesives, additives commonly used within a range that does not impair the object of the present invention, such as tackifiers, antioxidants, ultraviolet absorbers and the like may be added.

It is suitable that the said acrylic adhesive is an average molecular weight 10,000-400,000. If the molecular weight is less than 10,000, the stickiness of the surface is intensified. If the molecular weight is greater than 400,000, the compatibility with other compositions may be inferior, and the uniformity of the adhesive sheet layer 21 may be reduced.

In the present invention, the rubber-based pressure-sensitive adhesive may be used at least one material selected from butadiene copolymer, butadiene-styrene copolymer, acrylonitrile-butadiene copolymer and ethylene-propylene copolymer. Preferably, the rubber-based pressure-sensitive adhesive is preferably an acrylonitrile-butadiene copolymer.

The rubber-based pressure-sensitive adhesive is suitable that the average molecular weight is in the range of 50,000-500,000, more preferably 150,000 to 300,000. When the molecular weight is 50,000 or less, the adhesive force may increase, and the adhesive sheet layer 21 composition may be transferred to the portable terminal protective case. In addition, when the molecular weight is 500,000 or more, compatibility with the acrylic pressure-sensitive adhesive and the polyol composition is lowered, which makes it difficult to manufacture the composition and may cause surface irregularities.

The polyol composition of the present invention increases the elasticity of the adhesive layer through a urethane reaction.

In the present invention, the adhesive sheet layer 21 is used by curing in an appropriate method. As the hardening method of the said adhesive sheet layer 21, methods, such as hardening by a hardening | curing agent or hardening by photopolymerization, can be used.

As a hardening | curing agent which can be used for hardening the adhesive sheet layer 21 of this invention, an isocyanate type compound, a melamine type compound, and an amine compound can be used individually by 1 type, or can be used in combination of 2 or more type.

In the case of curing by photopolymerization, an appropriate photopolymerization initiator can be used according to the composition of the adhesive sheet layer 21, and the design of the photopolymerization initiator according to the composition of the adhesive sheet layer 21 is well known to those skilled in the art. For example, conventional ketones, halogen compounds, acyl phosphine oxides may be used as the photopolymerization initiator for the acrylic adhesive. In the present invention, the photopolymerization initiator may be used alone or in combination.

Graphene (graphene) used in the present invention refers to a conductive material having carbon atoms in a honeycomb arrangement in two dimensions and having a layer thickness of one atom. Graphene is not only structurally and chemically stable, it is also a very good conductor that can move electrons 100 times faster than silicon and carry about 100 times more current than copper. In addition, graphene has an advantage that it is very easy to process one-dimensional or two-dimensional nanopattern consisting of only a relatively light element carbon.

The graphene sheet may be prepared by various methods known in the art, and preferably, there is a peeling method and a SiC crystal pyrolysis method. Here, the peeling method is a method of peeling the graphene sheet from the surface of the graphite by attaching and detaching the adhesive tape on the graphite sample, SiC crystal pyrolysis method, when the SiC single crystal is heated, Si is decomposed and carbon remains after the surface of SiC is decomposed. Refers to the way the graphene sheet is produced.

Growth of the graphene sheet can be grown by various methods known in the art, preferably by chemical vapor deposition (CVD). It may be formed on a graphene growth support comprising a metal catalyst thin film for graphene growth. Graphene can be grown by providing a carbon source and heat to a graphene growth support including the graphene growth metal catalyst thin film, and the carbon source is, for example, carbon monoxide, carbon dioxide, methane, ethane, ethylene, ethanol Carbon source such as acetylene, propane, butane, butadiene, pentane, pentene, cyclopentadiene, hexane, cyclohexane, benzene, toluene, etc. Graphene grows as the carbon components present in the source combine to form a hexagonal plate-like structure.

The cover sheet constituting the cover sheet layer formed on the graphene sheet layer may be polyethylene terephthalate (PET), polycarbonate (PC), polyvinyl chloride (PVC), polyurethane (polyurethane, PU), acrylonitrile butadiene styrene (ABS), and a mixture thereof.

The portable terminal may be a mobile phone, a smart phone, an electronic dictionary, navigation, a notebook computer, a digital broadcasting terminal, a personal digital assistant (PDA) or a portable multimedia player (PMP).

As described above, the portable terminal case according to the present invention has an electromagnetic wave blocking and heat dissipation function.

6 is a photograph showing the results of thermal infrared imaging after burning the mobile phone terminal case of the present invention and the conventional mobile phone terminal case at a temperature of 75 ℃ for 30 minutes.

As a result, it was found that the temperature difference between the mobile phone terminal case not including the graphene sheet and the mobile phone terminal case of the present invention occurred at a maximum of about 15 ° C.

Figure 7 is a photograph showing the results of thermal infrared imaging of the heat generated in the mobile phone (before) not using the portable terminal case of the present invention and the mobile phone (after) not using the mobile terminal case of the present invention.

Therefore, the portable terminal case according to the present invention has an excellent heat dissipation function.

On the other hand, the portable terminal case according to the present invention has an electromagnetic wave blocking function.

After mounting the mobile phone terminal case manufactured according to the above embodiment to the mobile phone, and measured from the low frequency (~ 10MHz) to the microwave range from microwave (20 GHz) to the broadband electromagnetic wave, the electromagnetic shielding effect appeared to be more than 90% It was found that the shielding effect is excellent.

As described above in detail a specific part of the present invention, it is apparent to those skilled in the art that this specific technology is only a preferred embodiment, which is not limited to the scope of the present invention. Therefore, the substantial scope of the present invention will be defined by the appended claims and equivalents thereof.

10: portable terminal protective case 20: 3-layer graphene laminated film
21: adhesive sheet layer 22: graphene sheet layer
23: cover sheet layer

Claims (8)

(a) a portable terminal protective case; And (b) a graphene laminated film 20 having a three-layer structure attached to and detached from a side surface of the portable terminal protective case, wherein the graphene laminated film comprises an adhesive sheet layer 21; A graphene sheet layer 22 formed on the adhesive sheet layer; And a cover sheet layer 23 formed on the graphene sheet layer,
The portable terminal protective case is formed by injection molding a synthetic resin or rubber resin selected from the group consisting of polycarbonate (PC), acrylonitrile butadiene styrene (ABS) and PC / ABS blending Portable terminal case having electromagnetic shielding and heat dissipation.
delete The method of claim 1,
The synthetic resin or rubber resin is a portable terminal case having an electromagnetic shielding and heat dissipation function characterized in that it further comprises a graphene.
Portable terminal case having a function of electromagnetic shielding and heat dissipation produced by insert injection molding a graphene sheet (graphene sheet).
The method of claim 4, wherein
The injection resin solution for injection molding is a portable terminal case having an electromagnetic shielding and heat dissipation function, characterized in that it further comprises a graphene.
The method of claim 4, wherein
The portable terminal case includes an adhesive sheet layer 21; A graphene sheet layer 22 formed on the adhesive sheet layer; And a graphene laminated film 20 having a three-layer structure including a cover sheet layer 23 formed on the graphene sheet layer.
The graphene laminated film (20) is a portable terminal case having an electromagnetic shielding and heat dissipation function, characterized in that attached to the side of the portable terminal case through the adhesive sheet layer (21).
7. The method according to claim 1 or 6,
The adhesive sheet layer 21 is a portable terminal case having an electromagnetic wave blocking and heat dissipation function, characterized in that it comprises an acrylic pressure-sensitive adhesive, rubber-based pressure-sensitive adhesive and a polyol composition.
7. The method according to claim 1 or 6,
The cover sheet layer 23 is polyethylene terephthalate (PET), polycarbonate (PC), polyvinyl chloride (PVC), polyurethane (PU), acrylonitrile butadiene styrene (acrylonitrile) Butadiene styrene, ABS) and a portable terminal case having a function of shielding and radiating heat, characterized in that made of a synthetic resin selected from the group consisting of.

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