KR101894472B1 - Phone case and heat-radiating sheet shielding an electromagnetic wave - Google Patents

Abstract

A portable terminal case having a sheet having both electromagnetic shielding and a heat radiation function according to an embodiment of the present invention includes a front cover covering a display area for displaying information of a mobile phone and at least one of surface areas of the mobile phone except for the display area A hinge portion connecting the front cover and the rear cover; and a sheet provided on at least one of the inside of the front cover and the inside of the rear cover, Characterized in that it comprises a carbon fiber flat yarn composite fabric impregnated and dry-cured.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a portable terminal case having a built-in sheet having both electromagnetic wave shielding property and heat radiation property.

The present invention relates to a portable terminal case having a sheet having both electromagnetic shielding property and heat radiation property. More particularly, the present invention relates to a portable terminal case having an electromagnetic shielding property and a heat radiation property through a sheet made of a carbon fiber flattened yarn composite fabric impregnated in a resin, The present invention also relates to a portable terminal case having a seat having the same.

This study is the result of research carried out by the Ministry of Commerce, Industry and Energy and the Korea Industrial Technology Development Agency to promote the economic cooperation industry.

(This research was supported by the Ministry of Trade, Industry & Energy (MOTIE), Korea Institute for Advancement of Technology (KIAT) through the Encouragement Program for the Industries of Economic Cooperation Region.

It is a phenomenon that energy moves in the form of sinusoidal wave while the electromagnetic wave electric field and the magnetic field interact with each other. Generally, this means a radiation wave generated according to changes of electric field and magnetic field, and is useful for electronic devices such as radio communication and radar Not only does it cause malfunctions of electronics and communication devices, but it also has harmful effects on the human body.

The electric field is generated by the voltage and is easily disturbed by distances or obstacles such as trees, while the magnetic field is generated by the electric current and is in inverse proportion to the distance but not easily shielded.

Electromagnetic waves are emitted constantly, even though there are differences in the degree of difference in portable electronic devices such as electric heating devices, televisions, computers, washing machines and vacuum cleaners, as well as household appliances that are encountered in everyday life.

When the human body is exposed to such electromagnetic waves for a long period of time, the amount of irradiation increases in proportion to time, so that the problem of side effects can not be excluded. As a result of the controversy about harmfulness to human body, various means for shielding electromagnetic waves have been developed.

Electric heating devices such as electric mats are typical devices for generating electromagnetic waves, and the demand for electric heating devices is rapidly increasing in the recent era of high oil prices.

In the electric heating system, since the temperature is easily controlled, the air is not contaminated, and the sanitary, noise-free, and rapid heating characteristics are obtained, the induction current due to the static electricity and the electric field is inevitably generated, Induced currents caused by static electricity and electric fields generated are not only uncomfortable in real life but are also known to be harmful to health and cause psychological fear because they are in direct contact with the human body due to their use characteristics.

It is known that the charging phenomenon caused by electrostatic induction, which is closely related to the induced current due to the static electricity and the electric field, is caused by the potential difference at each position, and therefore the position where the potential difference is generated can be easily removed by the antistatic treatment for energizing each other.

In order to solve the problems of electric heating in recent years on the basis of this fact, a conductive sheet having conductivity is placed on the surface of the electric heating wire and the surface heating element in order to prevent the electrostatic phenomenon by removing the electric potential difference according to the position, A method of removing the static electricity on the electric heating wire and the surface heating element by grounding the shielding sheet is mainly used.

When considering only the conductivity, it is preferable to form such a shielding sheet by a metal plate. However, since the metal plate is likely to undergo plastic deformation, it is difficult to restore the original shape once the shape has been changed and is applied to a portion having various shapes and bends There is a limit to the versatility.

Also, as the operating time of the electronic product becomes longer, heat is generated from the electronic circuit and heat is transferred to the components of the electronic product. Excessive heat generation can degrade the performance of electronic products, weaken durability, and cause additional noise and continuous vibration.

In order to solve such a heat generation problem, a heat sink is provided as a heat dissipating means in the driving portion. For example, in a computer, a heat sink is installed at the top of an integrated circuit of a main board for heat dissipation of a CPU and the like.

However, in most cases, the amount of heat generated by the driving unit is greater than the amount of heat absorbed by the heat sink, so the heat sink alone can not solve the heating problem. In addition, although a heat-radiating fan is provided in the heat sink to thermally discharge heat to the outside, there is a limit to optimizing the heat dissipation efficiency.

In addition, it is difficult to apply the heat sink or the heat dissipating fan to a small portable electronic product. The driving part of the electronic product is generally composed of a noise component such as an integrated electronic circuit, a driving chip, etc. The electromagnetic wave radiated from such a noise component may cause serious electromagnetic interference as noise.

Although technologies for shielding electromagnetic waves have been developed, it is difficult to satisfy consumers' demands for miniaturization, weight reduction, and slimness while providing both heat dissipation means and electromagnetic wave shielding means for electronic products.

Embodiments of the present invention provide a portable terminal case having excellent heat conductivity and having an electromagnetic wave shielding function and a heat dissipation function for performing electromagnetic wave shielding.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other matters not mentioned can be clearly understood by those skilled in the art from the following description.

A portable terminal case having a sheet having both electromagnetic shielding and a heat radiation function according to an embodiment of the present invention includes a front cover covering a display area for displaying information of a mobile phone and at least one of surface areas of the mobile phone except for the display area A hinge portion connecting the front cover and the rear cover; and a sheet provided on at least one of the inside of the front cover and the inside of the rear cover, Characterized in that it comprises a carbon fiber flat yarn composite fabric impregnated and dry-cured.

Further, the seat includes a first sheet formed in a plate shape and provided inside the front cover, and a second sheet formed in a strip shape and provided inside the bumper portion of the rear cover.

Further, the carbon fiber flat yarn composite fabric is characterized in that one of the warp and weft yarns is a flat yarn carbon fiber fabric and the other yarn is a mixture of nylon and metal.

Further, the carbon fiber flat-knitting yarn composite fabric is characterized by being formed in multiple layers.

The flat yarn carbon fiber is characterized in that the flat yarn carbon fiber is selected from the group consisting of pitch-based carbon fibers, pitch-based ultrahigh modulus elastic carbon fibers, and carbon nanotubes.

Also, the metal yarn containing fabric composite is produced by mixing Nylon: Metal = 5: 2.

Further, the metal is characterized by containing any one of silver, gold, copper, aluminum, nickel, chromium, tin and iron.

Further, the resin is characterized by comprising a thermoplastic resin and a thermosetting resin.

Since the embodiments of the present invention have high heat dissipation, electromagnetic wave shielding, and electric conductivity, they can be applied to electronic apparatuses to enable miniaturization and weight reduction, and to improve stability and reliability of electronic apparatuses.

FIG. 1 is a perspective view illustrating a case of a portable terminal with a sheet having both electromagnetic wave shielding property and heat radiation property according to an embodiment of the present invention.
2 is a perspective view showing a sheet having electromagnetic wave shielding property and heat radiation property according to an embodiment of the present invention.
Fig. 3 is a cross-sectional view showing a sheet having electromagnetic wave shielding property and heat radiation property shown in Fig. 2 at the same time.
FIG. 4 is a perspective view illustrating a case of a portable terminal with a sheet having both electromagnetic wave shielding property and heat radiation property according to another embodiment of the present invention.
5 is a cross-sectional view showing a sheet having electromagnetic wave shielding property and heat radiation property according to still another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention.

The present invention is not limited to the embodiments described below, but may be embodied in other forms. In order to clearly explain the present invention, parts not related to the description are omitted from the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

Also, terms such as " first ", "second ", and the like are used to distinguish one element from another element, and the scope of the right should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. It should be understood that the term "and / or" includes all possible combinations from one or more related items. For example, the meaning of "first item, second item and / or third item" may be presented from two or more of the first, second or third items as well as the first, second or third item It means a combination of all the items that can be. It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, it should be understood that no component is present. On the other hand, other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well. It should be understood that the singular " include "or" have "are to be construed as including a stated feature, number, step, operation, component, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

The sheet having both electromagnetic shielding property and heat radiation property of the portable terminal case according to the embodiment of the present invention absorbs radio waves and has a high thermal conductivity. The sheet having both electromagnetic shielding property and heat radiation property of the portable terminal case includes a carbon fiber flat yarn composite fabric impregnated in a resin and dried and cured.

The resin used in the embodiment of the present invention includes a thermoplastic resin and a thermosetting resin, and examples of the thermoplastic resin include a polyolefin resin, a polyamide resin, an elastomer resin (styrene resin, olefin resin, PVC resin, urethane resin, Based resin, acrylic-based resin, high-performance plastic, and the like.

Particularly, polyethylene, polypropylene, nylon resin, ABS resin, acrylic resin, ethylene acrylate resin, ethylene-vinyl acetate resin, polystyrene resin, polycarbonate resin, polyester elastomer resin, polyamide elastomer resin and liquid crystal polymer are selected.

Above all, nylon resin, polyester elastomer resin, polyamide elastomer resin, ABS resin, polypropylene resin and liquid crystal polymer are suitable for heat resistance and flexibility.

Further, an epoxy resin, a melamine resin, a phenol resin, a silicone resin, a urethane resin and the like are used as the thermosetting resin. Above all, epoxy resin, silicone resin and urethane resin are suitable for heat resistance and flexibility.

These resins may be added with a dispersant, a lubricant and a plasticizer. In particular, by using a fatty acid ester as a dispersant, the filling ratio of the carbon fiber and the graphite powder can be increased and the characteristics can be improved.

FIG. 1 is a perspective view illustrating a case of a portable terminal with a sheet having both electromagnetic wave shielding property and heat radiation property according to an embodiment of the present invention.

1, a portable terminal case 10 incorporating a sheet having both electromagnetic wave shielding property and heat radiation property according to an embodiment of the present invention includes a front cover 100 covering a display area for displaying information of a cellular phone, A rear cover 200 covering at least one of the surface areas of the mobile phone except for the display area, a hinge 300 connecting the front cover 100 and the rear cover 200, And a sheet 400 which is installed in the interior of the housing 400 and has both electromagnetic wave shielding property and heat radiation property.

The front cover 100 is connected to one side of the rear cover 200 through the hinge 300 and serves to open and close the bumper 210 of the rear cover 200 as it is rotated.

The front cover 100 may be configured to have a width that is greater than the width of the mobile phone display area so that the front cover 100 can cover or open the display area of the mobile phone.

The rear cover 200 is provided with a bumper 210 that surrounds the edge surface area of the mobile phone. The mobile phone can be mounted on the bumper 210.

The bumper part 210 may protrude from the edge display area of the mobile phone by a predetermined thickness. For example, the bumper part 210 may surround the surface of the mobile phone exposed to the outside. The bumper 210 may be of a soft or hard material.

Therefore, the cellular phone can be detachably mounted to the bumper portion 210 of the rear cover 200. [

The sheet 400 having electromagnetic shielding properties and heat dissipation properties of the portable terminal case according to an embodiment of the present invention is formed in a plate shape and installed inside the front cover 100.

FIG. 2 is a perspective view showing a sheet having both electromagnetic wave shielding property and heat radiation property according to an embodiment of the present invention, and FIG. 3 is a sectional view showing a sheet having electromagnetic shielding property and heat radiation property shown in FIG.

As shown in FIGS. 2 and 3, the sheet 400 having both the electromagnetic wave shielding property and the heat radiation property of the case 10 of the portable terminal according to the embodiment of the present invention is made of carbon fiber impregnated in the resin 410, Flat yarn composite fabrics 420 and 430 include flat yarn carbon fibers 420 in one of the warp and weft yarns and the other is a metal yarn in which nylon and metal are mixed Woven composite 430. The fabric composite 430 includes a plurality of woven fabrics.

The resin 410 used in the embodiment of the present invention includes a thermoplastic resin and a thermosetting resin. Examples of the thermoplastic resin include a polyolefin resin, a polyamide resin, an elastomer resin (styrene resin, olefin resin, PVC resin, urethane resin, Based, amide-based) resin, an acrylic resin, and a high-performance plastic.

Particularly, polyethylene, polypropylene, nylon resin, ABS resin, acrylic resin, ethylene acrylate resin, ethylene-vinyl acetate resin, polystyrene resin, polycarbonate resin, polyester elastomer resin, polyamide elastomer resin and liquid crystal polymer are selected. Above all, nylon resin, polyester elastomer resin, polyamide elastomer resin, ABS resin, polypropylene resin and liquid crystal polymer are suitable for heat resistance and flexibility.

Further, an epoxy resin, a melamine resin, a phenol resin, a silicone resin, a urethane resin and the like are used as the thermosetting resin. Above all, epoxy resin, silicone resin and urethane resin are suitable for heat resistance and flexibility.

A dispersant, a lubricant, and a plasticizer may be added to these resins 410. In particular, by using a fatty acid ester as a dispersant, the filling ratio of carbon fibers and graphite powder can be increased and the characteristics can be improved.

As the flat yarn carbon fiber 420, pitch-based carbon fiber, pitch-based ultrahigh modulus elastic carbon fiber, and carbon nanotube may be used. In order to improve the thermal conductivity, the pitch-based ultrahigh modulus of elasticity carbon fiber preferably has a thermal conductivity of 50 W / mK or more. In addition, carbon nanotubes have a property of absorbing electromagnetic waves in a small amount. However, since carbon nanotubes are very high in cost, it is preferable to add pitch-based ultra-high modulus carbon fibers and carbon nanotubes as pitch-based carbon fibers as a main body in consideration of cost.

The metal yarn containing fabric composite 430 is produced by mixing various metals (for example, Nylon: Metal = 5: 2) at a certain ratio. The metal may be manufactured by appropriately adjusting the content of resin in a fabric (Nylon: Al = 5: 2) which is made of aluminum and having the best shielding efficiency.

Such a metal is not limited to metal oxides, metal nitrides and metal carbides such as aluminum oxide, magnesium oxide, boron nitride, aluminum nitride, aluminum hydroxide, silicon carbide and waste light, which are excellent in thermal conductivity, as well as silver, gold, copper, aluminum, , Tin, iron, and the like.

Hereinafter, a carbon fiber flat yarn composite fabric according to another embodiment of the present invention will be described.

The carbon fiber flat yarn composite fabric according to another embodiment of the present invention includes flat yarn carbon fiber and metal yarn containing fabric composite and graphite powder in the resin.

The resin used in the embodiment of the present invention includes a thermoplastic resin and a thermosetting resin, and examples of the thermoplastic resin include a polyolefin resin, a polyamide resin, an elastomer resin (styrene resin, olefin resin, PVC resin, urethane resin, Based resin, acrylic-based resin, high-performance plastic, and the like. Particularly, polyethylene, polypropylene, nylon resin, ABS resin, acrylic resin, ethylene acrylate resin, ethylene-vinyl acetate resin, polystyrene resin, polycarbonate resin, polyester elastomer resin, polyamide elastomer resin and liquid crystal polymer are selected. Above all, nylon resin, polyester elastomer resin, polyamide elastomer resin, ABS resin, polypropylene resin and liquid crystal polymer are suitable for heat resistance and flexibility.

Further, an epoxy resin, a melamine resin, a phenol resin, a silicone resin, a urethane resin and the like are used as the thermosetting resin. Above all, epoxy resin, silicone resin and urethane resin are suitable for heat resistance and flexibility.

These resins may be added with a dispersant, a lubricant and a plasticizer. In particular, by using a fatty acid ester as a dispersant, the filling ratio of the carbon fiber and the graphite powder can be increased and the characteristics can be improved.

As the flat yarn carbon fiber 420, pitch-based carbon fiber, pitch-based ultrahigh modulus elastic carbon fiber, and carbon nanotube may be used. In order to improve the thermal conductivity, the pitch-based ultrahigh modulus of elasticity carbon fiber preferably has a thermal conductivity of 50 W / mK or more. In addition, carbon nanotubes have a property of absorbing electromagnetic waves in a small amount. However, since carbon nanotubes are very high in cost, it is preferable to add pitch-based ultra-high modulus carbon fibers and carbon nanotubes as pitch-based carbon fibers as a main body in consideration of cost.

The metal yarn containing fabric composite 430 is produced by mixing various metals (for example, Nylon: Metal = 5: 2) at a certain ratio. The metal may be manufactured by appropriately adjusting the content of resin in a fabric (Nylon: Al = 5: 2) which is made of aluminum and having the best shielding efficiency.

Such a metal is not limited to metal oxides, metal nitrides and metal carbides such as aluminum oxide, magnesium oxide, boron nitride, aluminum nitride, aluminum hydroxide, silicon carbide and waste light, which are excellent in thermal conductivity, as well as silver, gold, copper, aluminum, , Tin, iron, and the like.

Graphite powder is a carbon material together with carbon fiber, and has excellent thermal conductivity and electromagnetic wave absorptivity.

Also, the graphite powder has high electrical conductivity, and the carbon fiber can improve the strength of the material and improve the impact resistance.

The graphite powder and the carbon fiber are entangled with each other by mixing in an appropriate ratio or an equivalent ratio, so that heat radiation and electrical conductivity can be enhanced.

Further, when a spherical graphite powder having a fixed carbon content of 95% or more as the graphite powder is used, it is possible to improve the heat dissipation property and reduce the electric resistance value. Further, by adding carbon black, the heat radiation property and the electromagnetic wave absorption property can be further improved.

As the graphite powder, spherical graphite powder and scaly graphite powder can be used. Spherical graphite powder is particularly suitable. Further, by using a graphite powder having a fixed carbon content of 95% or more, heat radiation and electrical characteristics can be further improved. The average particle diameter of the graphite powder is 0.3 占 퐉 or more and 50 占 퐉 or less, more preferably 0.5 占 퐉 or more and 40 占 퐉 or less, and further preferably 1 占 퐉 or more and 20 占 퐉 or less.

The proportion of the graphite powder contained in the resin-carbon composite material of the present invention is preferably 10 to 60% by volume based on the total amount. When the content is less than 10% by volume, the heat radiation property and the electromagnetic wave absorption property are not effective. When the content is more than 60% by volume, the strength of the formed article is lowered. More preferably 10 to 50% by volume, and particularly preferably 15 to 40%.

It is also preferable to use carbon black of nanometer size in diameter in addition to graphite powder. By adding carbon black, it becomes possible to increase the contact area between carbon atoms, thereby making it possible to improve the heat dissipation property and improve the electromagnetic wave absorption property.

As the carbon black, ketjen black having high conductivity is particularly preferable. The average particle diameter of the carbon black is preferably 1 nm to 100 nm, and more preferably 10 nm to 50 nm.

Hereinafter, a carbon fiber flat yarn composite fabric according to another embodiment will be described.

The carbon fiber flat yarn composite fabric according to another embodiment of the present invention includes flat yarn carbon fiber and metal yarn containing fabric composite and ceramics powder in the resin.

The resin used in another embodiment of the present invention includes a thermoplastic resin and a thermosetting resin, and examples of the thermoplastic resin include a polyolefin resin, a polyamide resin, an elastomer resin (styrene resin, olefin resin, PVC resin, urethane resin, , Amide-based) resin, acrylic resin, high-performance plastic and the like. Particularly, polyethylene, polypropylene, nylon resin, ABS resin, acrylic resin, ethylene acrylate resin, ethylene-vinyl acetate resin, polystyrene resin, polycarbonate resin, polyester elastomer resin, polyamide elastomer resin and liquid crystal polymer are selected. Above all, nylon resin, polyester elastomer resin, polyamide elastomer resin, ABS resin, polypropylene resin and liquid crystal polymer are suitable for heat resistance and flexibility.

Further, an epoxy resin, a melamine resin, a phenol resin, a silicone resin, a urethane resin and the like are used as the thermosetting resin. Above all, epoxy resin, silicone resin and urethane resin are suitable for heat resistance and flexibility.

A dispersant, a lubricant, and a plasticizer may be added to these resins 410. In particular, by using a fatty acid ester as a dispersant, the filling ratio of carbon fibers and graphite powder can be increased and the characteristics can be improved.

As the flat yarn carbon fiber 420, pitch-based carbon fiber, pitch-based ultrahigh modulus elastic carbon fiber, and carbon nanotube may be used. In order to improve the thermal conductivity, the pitch-based ultrahigh modulus of elasticity carbon fiber preferably has a thermal conductivity of 50 W / mK or more. In addition, carbon nanotubes have a property of absorbing electromagnetic waves in a small amount. However, since carbon nanotubes are very high in cost, it is preferable to add pitch-based ultra-high modulus carbon fibers and carbon nanotubes as pitch-based carbon fibers as a main body in consideration of cost.

The metal yarn containing fabric composite 430 is produced by mixing various metals (for example, Nylon: Metal = 5: 2) at a certain ratio. The metal may be manufactured by appropriately adjusting the content of resin in a fabric (Nylon: Al = 5: 2) which is made of aluminum and having the best shielding efficiency.

Such a metal is not limited to metal oxides, metal nitrides and metal carbides such as aluminum oxide, magnesium oxide, boron nitride, aluminum nitride, aluminum hydroxide, silicon carbide and waste light, which are excellent in thermal conductivity, as well as silver, gold, copper, aluminum, , Tin, iron, and the like.

Alumina, aluminum nitride, silicon carbide, silicon nitride, and boron nitride powder are used as the ceramic powder. The particle diameter is preferably 1 m or more and 20 m or less.

A spherical shape is suitable for the particle shape. As ceramic materials, alumina ceramics is particularly suitable in view of cost, and aluminum nitride is preferable in terms of self heat dissipation and thermal conductivity.

Another embodiment of the present invention will be described with reference to Fig. The same reference numerals are assigned to the same components as those of the above-described embodiment, and a description thereof will be omitted. FIG. 4 is a perspective view illustrating a case of a portable terminal with a sheet having both electromagnetic wave shielding property and heat radiation property according to another embodiment of the present invention.

As shown in FIGS. 1 and 4, a portable terminal case 10 'having a sheet having both electromagnetic wave shielding property and heat radiation property according to another embodiment of the present invention covers a display area for displaying information of a cellular phone A rear cover 200 covering at least one of the surface areas of the mobile phone except for the display area, a hinge 300 connecting the front cover 100 and the rear cover 200, And a plurality of sheets 400 and 500 installed inside the front cover 100 and inside the rear cover 200, respectively.

The sheet 400 having the electromagnetic shielding property and the heat dissipation property of the portable terminal case 10 'according to another embodiment of the present invention is formed in a plate shape and the first sheet And a second sheet 500 formed in a strip shape and installed inside the bumper portion 210 of the rear cover 200.

The bumper part 210 of the portable terminal case 10 'having the sheet having the electromagnetic wave shielding property and the heat radiating property according to another embodiment of the present invention includes the first bumper part 211 attached to the rear cover 200, The second seat 500 can be positioned between the first bumper portion 211 and the second bumper portion 212 including the second bumper portion 212 attached to the first bumper portion 211 .

Therefore, the cellular phone case 10 'according to another embodiment of the present invention is excellent in electromagnetic wave shielding property and heat dissipation characteristic not only in the front cover 100 but also in the space between the front cover 100 and the rear cover 200 Effect.

Another embodiment of the present invention will be described with reference to Fig. The same reference numerals are assigned to the same components as those of the above-described embodiment, and a description thereof will be omitted. 5 is a cross-sectional view showing a sheet having electromagnetic wave shielding property and heat radiation property according to still another embodiment of the present invention.

As shown in FIGS. 1 and 5, a portable terminal case 10 '' incorporating a sheet having both electromagnetic wave shielding and a heat radiation function according to another embodiment of the present invention includes a display area A rear cover 200 covering at least one of the surface areas of the mobile phone except for the display area and a hinge connecting the front cover 100 and the rear cover 200. [ And a sheet 400 'installed on at least one of the inside of the front cover 100 and the inside of the rear cover 200. The sheet 400' A first carbon fiber flattened yarn composite fabric (420, 430) that is cured to define a lower layer and a second carbon fiber flattened yarn composite fabric (420, 430) formed on an upper layer of the first carbon fiber flattened yarn composite fabric .

That is, the seat 400 'having the electromagnetic shielding function and the heat dissipation function of the portable terminal case according to another embodiment of the present invention is formed in a multilayer structure, so that the electromagnetic wave shielding property and the heat dissipation property are further improved.

The foregoing has shown and described specific embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (8)

A front cover covering a display area for displaying information of the mobile phone;
A rear cover covering at least one area of the surface areas of the mobile phone excluding the display area;
A hinge connecting the front cover and the rear cover;
And a seat disposed on at least one of the inside of the front cover and the inside of the rear cover,
Said sheet comprising a carbon fiber flat yarn composite fabric impregnated in a resin and dry-cured,
Wherein said carbon fiber flat yarn composite fabric is formed by flat yarn carbon fibers as one of warp yarns and weft yarns and a metal yarn containing yarn composite as another yarn among warp yarns and weft yarns and graphite powder or ceramic powder impregnated in the resin,
When the carbon fiber flat yarn composite fabric includes the graphite powder, the graphite powder is a spherical graphite powder having a fixed carbon content of 95% or more, and the ratio of the graphite powder is 10 to 60% by volume Portable terminal case with a seat with electromagnetic shielding and heat dissipation function at the same time. The method according to claim 1,
The sheet
A first sheet formed in a plate shape and provided inside the front cover,
And a second sheet formed in a strip shape and installed inside the bumper portion of the rear cover, wherein the sheet has both electromagnetic shielding and a heat radiation function. delete The method according to claim 1,
The carbon fiber flat yarn composite fabric is characterized in that,
Wherein the cover is formed of a plurality of layers. The method according to claim 1,
Wherein the flat yarn carbon fiber is selected from the group consisting of pitch carbon fiber, pitch ultra high modulus carbon fiber, carbon nanotube, and the like. The method according to claim 1,
Wherein the metal yarn containing fabric composite is manufactured by mixing Nylon: Metal = 5: 2 ratio. The method according to claim 6,
Wherein the metal includes at least one of silver, gold, copper, aluminum, nickel, chromium, tin, and iron. The method according to claim 1,
Wherein the resin includes a thermoplastic resin and a thermosetting resin, the case including a sheet having both electromagnetic wave shielding and a heat radiation function.

Images