KR20140113226A - A pressure-sensitive adhesive tape and manufacturing method thereof - Google Patents

Abstract

A conductive adhesive tape with a heat dissipating function of the present invention comprises a division layer formed in a nanoweb shape by an electrospinning method; a first metal layer stacked on one side of the division layer and having thermal conductivity; a second metal layer stacked on the other side of the division layer and having electrical conductivity; a first conductive adhesive layer stacked on the first metal layer; and a second conductive adhesive layer stacked on the second metal layer, to reduce the thickness and perform a heat dissipating function and an electromagnetic shielding function at the same time.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pressure-sensitive adhesive tape and a manufacturing method thereof,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductive adhesive tape having a heat dissipating function for mutually attaching components of an electronic apparatus and dissipating heat generated by components to dissipate heat and for shielding electromagnetic waves.

2. Description of the Related Art In general, electronic devices such as computers, personal digital assistants, and communication devices can not dissipate excessive heat energy generated inside a device to the outside, which causes serious problems of after-image problems and system stability. These thermal energies shorten the life of the product, cause malfunctions and malfunctions, and, in severe cases, cause explosions and fires.

Particularly, since the thickness of the portable electronic device is slim and the performance is high, the heat generated from various circuit components inside the device must be quickly released to the outside, so that the electronic device is prevented from being damaged by heat.

Therefore, a heat-radiating sheet is provided to radiate heat energy generated inside the system to the outside.

A conventional heat-radiating sheet has a heat-conductive metal plate and a pressure-sensitive adhesive sheet which is formed on at least one surface of the metal plate and in which a cell is formed as a foam structure, as disclosed in Patent Document 10-0721462 (May 17, 2007) Wherein the tacky foam sheet is formed of a tacky mixture containing a tackifier and a cell forming agent, the tacky agent is an acrylic resin, a silicone resin or a polyurethane resin, and the cell former comprises a microcavity.

However, the conventional heat-radiating sheet has a problem that it is difficult to use for a thin electronic device such as a portable electronic device because the heat-radiating sheet has a thick thickness because a sticky foam sheet is attached to the surface of the metal plate.

In addition, since the conventional heat radiation sheet adheres to components of an electronic apparatus and functions only to diffuse and dissipate heat generated from components, and an adhesive tape for joining components to each other is separately provided, the number of parts increases, There is a problem that the thickness becomes thick and the cost increases.

Registered Patent Publication No. 10-0721462 (May 17, 2007)

It is an object of the present invention to provide a pressure-sensitive adhesive tape which couples the components to each other by providing a heat radiation function to simultaneously perform the adhesive tape function and the heat radiation function, thereby reducing the number of components, An adhesive tape and a method for improving the same.

Another object of the present invention is to provide a conductive adhesive tape having a heat dissipating function capable of shielding electromagnetic waves generated from a component by imparting not only a heat radiation function but also an electromagnetic wave shielding function to the adhesive tape, and a manufacturing method thereof.

Another object of the present invention is to provide a conductive adhesive tape having a heat dissipating function and a method of manufacturing the same, which has a plurality of metal layers and is provided with a partition layer between metal layers so that heat is dissipated by a plurality of metal layers .

Another object of the present invention is to provide a conductive adhesive tape having a heat dissipating function capable of improving heat conduction performance by making a partition layer separating metal layers into a nano web shape by thinning a thickness by an electrospinning method, .

Another object of the present invention is to provide a conductive adhesive tape having a heat radiation function capable of improving the adhesive performance while making the thickness of the adhesive layer or the metal layer thinner by making it into a nano-web form by an electrospinning method and a method of manufacturing the same.

  It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. .

In order to achieve the above object, a conductive adhesive tape having a heat radiation function according to the present invention comprises a partition layer formed in the form of a nanowire by an electrospinning method, a first metal layer laminated on one surface of the partition layer and having thermal conductivity, A second conductive layer laminated on the other surface of the partition layer and having electrical conductivity; a first conductive adhesive layer laminated on the first metal layer; and a second conductive adhesive layer laminated on the second metal layer.

The partition layer of the present invention is formed by mixing a polymer material capable of being electrospun, a heat conduction material, and a solvent at a predetermined ratio to prepare a spinning solution, electrospinning the spinning solution to form nanofibers, Can be formed in a web form.

The first metal layer may have a thickness of 5 to 10 mu m and the second metal layer may have a thickness of 10 to 18 mu m.

The first metal layer and the second metal layer of the present invention may be reduced in weight, and a plurality of through holes through which the adhesive material of the first adhesive layer and the second adhesive layer are introduced may be formed.

The first conductive adhesive layer of the present invention may be formed of a thermally conductive adhesive material to allow heat conduction, and the second conductive adhesive layer may be formed of an electrically conductive adhesive material to allow electrical conduction.

In the first conductive adhesive layer and the second conductive adhesive layer of the present invention, an antioxidant for preventing oxidation of the first metal layer and the second metal layer may be added.

The cushion layer may further include a cushion layer laminated on at least one of the first conductive adhesive layer and the second conductive adhesive layer of the present invention to improve adhesion and remove bubbles.

A conductive adhesive tape having a heat radiation function of the present invention includes a plurality of metal layers, a plurality of partition layers laminated between metal layers to form a space between the metal layers and formed in the form of a nanoweb by an electrospinning method, And a second conductive adhesive layer formed on the other surface of the metal layer.

A method of manufacturing a conductive adhesive tape having a heat radiation function according to the present invention includes the steps of forming a nanoweb-shaped partition layer by electrospinning a polymer material, laminating a first metal layer and a second metal layer on both sides of the partition layer, , Laminating a first conductive adhesive layer on the first metal layer, and laminating a second conductive adhesive layer on the second metal layer.

The method for manufacturing a conductive adhesive tape having a heat radiation function according to the present invention comprises the steps of: forming a first partition layer in the form of a nano-web by electrospinning a polymer material on one surface of a first metal layer; Forming a first conductive adhesive layer by electrospinning the second metal layer to form a second partition layer in the form of a nanoweb by electrospinning a polymeric material on one surface of the second metal layer, Forming a second conductive adhesive layer by electrospinning the material, and laminating the first and second partition layers.

As described above, in the conductive adhesive tape having the heat radiation function of the present invention, the adhesive layer in the adhesive tape that couples the components of the electronic apparatus to each other is formed of an adhesive layer containing a thermally conductive material or an electrically conductive material, A heat conductive and electrically conductive metal layer is formed so that the function of mutually attaching the two parts and the function of dissipating the heat generated in the parts can be performed at the same time, so that the number of parts can be reduced and the manufacturing cost can be reduced have.

In addition, the conductive adhesive tape having the heat radiation function of the present invention has an advantage that the heat-conductive metal layer has the electromagnetic wave shielding performance and can shield the electromagnetic wave generated from the component.

Further, the conductive adhesive tape having a heat radiation function of the present invention is advantageous in that it has a plurality of metal layers, and a partition layer is formed between the metal layers to improve the heat radiation performance.

In addition, the conductive adhesive tape having a heat radiation function of the present invention is advantageous in that the partitioning layer can be manufactured in the form of a nanoweb by an electrospinning method to reduce the thickness and improve the heat insulating performance.

In addition, the conductive adhesive tape having a heat radiation function of the present invention is advantageous in that the adhesive layer can be made into a nano-web form by an electrospinning method to make the thickness thinner while improving the adhesive performance.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view of an electronic device part to which an adhesive tape of the present invention is attached. Fig.
2 is a sectional view of an adhesive tape according to a first embodiment of the present invention.
3 is an enlarged photograph of the partition layer according to the first embodiment of the present invention.
4 is a cross-sectional view of an adhesive tape according to a second embodiment of the present invention.
5 is a plan view of a first metal layer and a second metal layer according to a second embodiment of the present invention.
6 is a plan view showing another structure of the second metal layer and the second metal layer according to the second embodiment of the present invention.
7 is a cross-sectional view of an adhesive tape according to a third embodiment of the present invention.
8 is a plan view of a cushion layer according to a third embodiment of the present invention.
9 is a sectional view of an adhesive tape according to a fourth embodiment of the present invention.
10 is a configuration diagram of the electrospinning device according to the first embodiment of the present invention.
11 is a configuration diagram of an electrospinning device according to a second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. Definitions of these terms should be based on the content of this specification.

Fig. 1 is a cross-sectional view of an electronic device part to which an adhesive tape of the present invention is attached, and Fig. 2 is a sectional view of an adhesive tape having a heat radiation function according to the first embodiment.

1, the adhesive tape 100 of the present invention is disposed between a first part 200 and a second part 300 and has a role of attaching the first part 200 to the second part 300 do.

Here, both the first part 200 and the first part 300 may be heat generating parts, the first part 200 is a heat generating part, and the second part 300 is an electromagnetic wave generating part Any one of the first part 200 and the second part 300 may be a heat generating and electromagnetic wave generating part and the other may be a heat dissipating part such as a heat sink.

2, the adhesive tape 100 according to the first embodiment includes a partition layer 10 formed in the form of a nano-web by an electrospinning method, and a thermally conductive layer (not shown) laminated on one surface of the partition layer 10, A second metal layer 30 laminated on the other surface of the partition layer 10 and having thermal conductivity and electrical conductivity and a first conductive adhesive layer 30 laminated on the first metal layer 20 40 and a second conductive adhesive layer 50 laminated on the second metal layer 30.

Since the partition layer 10 is formed in the form of a nano-web in which the nanofibers are accumulated by electrospinning, the partition layer 10 can be made thin and can be made to be heat-conductive so as to allow heat conduction between the first metal layer 20 and the second metal layer 30. [ Structure can be applied.

In addition, the partition layer 10 may be formed of an insulating structure capable of electrically insulating the first metal layer 20 and the second metal layer 30 from each other. In addition, the partition layer 10 may have a structure that can conduct heat and is electrically insulated.

As described above, the partition layer 10 can provide various functions depending on the role of the adhesive tape according to the present embodiment.

3, the partition layer 10 is formed by mixing a polymer material capable of being electrospun and a solvent at a predetermined ratio to prepare a spinning solution, electrospinning the spinning solution to form nanofibers 14, The nanofibers 14 are accumulated in the form of a nano web having a plurality of pores 12.

Herein, the spinning solution may contain a thermally conductive material, may include an insulating material so as to be electrically insulated, and may include a material capable of being electrically conductive while allowing heat conduction.

The diameter of the nanofiber 14 is in the range of 0.3 to 1.5 mu m, and the thickness of the partition layer 10 is 0.5 mu m to 2 mu m, preferably 1 mu m.

Since the partition layer 10 serves to separate the metal layers 20 and 30 from each other, the entire thickness of the tape can be reduced by making the partition layer 10 as thin as possible.

Since the partition layer 10 of this embodiment is manufactured by the electrospinning method, the thickness is determined according to the spinning amount of the spinning solution. Therefore, it is easy to make the thickness of the partition layer 10 to be a desired thickness, and the thickness can be made thin.

By fabricating the nanoweb in the form of nanofibers formed by accumulation of nanofibers by the electrospinning method, the thickness can be made thin and the strength can be enhanced.

Here, the spinning method applied to the present invention is a spinning method using general electrospinning, air-electrospinning (AES), electrospray, electrobrown spinning, centrifugal electrospinning, , And flash-electrospinning may be used.

The polymeric material used to make the partition layer 10 may be selected from, for example, low polymer polyurethane, high polymer polyurethane, PS, polyvinylalcohol (PVA), polymethyl methacrylate (PMMA), polylactic acid polyvinylpyrrolidone (PVP), polyvinylchloride (PVP), nylon (polyvinylpyrrolidone), polyacrylonitrile (PAN), polyacrylonitrile (Nylon), polycarbonate (PC), polyetherimide (PEI), polyvinylidene fluoride (PVdF), polyetherimide (PEI), and polyestheresulphone (PES).

The solvent is selected from the group consisting of DMA (dimethyl acetamide), N, N-dimethylformamide, N-methyl-2-pyrrolidinone, DMSO, THF, DMAc, ethylene carbonate, DEC, dimethyl carbonate, ethyl methyl carbonate, propylene carbonate, water, acetic acid, and acetone. .

When the partition layer 10 has a heat conduction function, a thermal conductive material is included. The thermal conductive material may include a thermally conductive metal such as Ni, Cu, and Ag, and a conductive carbon, a conductive carbon black ), A carbon nanotube (CNT), and a conductive polymer (PDOT). In addition, any material having thermal conductivity may be used.

The first metal layer 20 serves to rapidly dissipate heat generated from the first component and dissipate heat, and is formed of a conductive metal thin film.

The first metal layer 20 may be made of Ni, Cu, Ag or an alloy thereof. Preferably, the first metal layer 20 may be made of Cu having a good thermal conductivity. Copper foil Can be applied.

The thickness of the first metal layer 20 is preferably 5 to 10 占 퐉, which can reduce the thickness while improving the heat radiation performance.

The second metal layer 30 shields the electromagnetic waves generated from the second component 300 and dissipates heat generated by the second component 300 by rapidly diffusing the heat. Heat can be transferred through the first metal layer 20 and dissipated.

Here, the second metal layer 30 may be made of an electrically conductive metal capable of shielding electromagnetic waves generated from the second component 300, preferably, Cu having excellent electromagnetic wave shielding performance may be used, and a copper foil ) Can be applied.

The thickness of the second metal layer 30 is preferably 10 to 18 占 퐉 so that the thickness of the second metal layer 30 can be reduced while the electromagnetic wave shielding performance is excellent.

The first metal layer 20 and the second metal layer 30 may be formed in the form of a nanoweb having a plurality of pores by an electrospinning method. That is, the first metal layer 20 is formed by mixing a polymer material capable of electrospinning, a thermally conductive material capable of radiating heat, and a solvent at a predetermined ratio to prepare a spinning solution, and the spinning solution is electrospun to form nanofibers , And the nanofibers are accumulated to form a nano web having a plurality of pores.

The second metal layer 30 is formed by mixing an electrospun polymer material, an electroconductive material capable of shielding electromagnetic waves and a solvent at a predetermined ratio to prepare a spinning solution, electrospinning the spinning solution to form nanofibers, Fibers are accumulated and formed into a nano web having many pores.

The first conductive adhesive layer 40 may be attached to the first metal layer 20 to serve to bond the first component 200 and the first metal layer 20 together and to prevent the heat generated from the first component 200 1 metal layer 20, and is formed of a thermally conductive adhesive material.

The first conductive adhesive layer 40 penetrates into the hole 22 formed in the first metal layer 20 and enhances adhesion with the first metal layer 20.

The second conductive adhesive layer 50 may be attached to the second metal layer 30 and may serve to bond the second component 300 and the second metal layer 30 to each other and to bond the second component 50 and the second metal layer 30 So that the electromagnetic wave generated from the second component can be shielded by the second metal layer 30. [

An antioxidant is added to the adhesive material of the first conductive adhesive layer 40 and the second conductive adhesive layer 50 to prevent the first metal layer 20 and the second metal layer 30 from being oxidized.

That is, the first metal layer 20 and the second metal layer 30 may be oxidized at the side exposed to the outside and the portion to be adhered to the adhesive layer. Therefore, an antioxidant is added to the first conductive adhesive layer 40 and the second conductive adhesive layer 50 to prevent the first metal layer 20 and the second metal layer 30 from being oxidized.

The first conductive adhesive layer 40 and the second conductive adhesive layer 50 are formed on the surfaces of the first metal layer 20 and the second metal layer 22 by coating or sputtering an adhesive material containing a thermally conductive material and an electrically conductive material, , Printing, or the like.

The first conductive adhesive layer 40 and the second conductive adhesive layer 50 may be formed in the form of a nanoweb by an electrospinning method.

The first conductive adhesive layer 40 is formed by mixing a thermally conductive thermally conductive material, an adhesive material, and a solvent at a predetermined ratio to prepare a spinning solution, electrospinning the spinning solution to form nanofibers, And is formed in a web form.

The second conductive adhesive layer 50 may be formed of an electrically conductive metal such as Ni, Cu, Ag and the like and a carbon black, carbon nanotube, graphene, conductive polymer (PDOT) And a solvent are mixed to form a conductive adhesive material having a viscosity suitable for electrospinning, and the conductive adhesive material is electrospun to form a nano-web.

As described above, when the first conductive adhesive layer 40 and the second conductive adhesive layer 50 are electrospun and formed into a nanoweb shape, the thickness can be made thin and the adhesive strength can be improved.

FIG. 4 is a cross-sectional view of an adhesive tape according to a second embodiment of the present invention, and FIGS. 5 and 6 are plan views of a first metal layer and a second metal layer according to a second embodiment of the present invention.

The adhesive tape according to the second embodiment has the same structure as that of the adhesive tape described in the first embodiment and has a structure in which the plurality of through holes 22 are formed in the first metal layer 20 and the second metal layer 30 .

The first metal layer 20 and the second metal layer 30 can improve the adhesive strength to the first adhesive layer 40 and the second adhesive layer 50 while maintaining the electromagnetic wave shielding performance and the heat radiation performance, A plurality of through holes 22 are formed.

Here, the through holes formed in the first metal layer 20 and the second metal layer 30 may be formed as circular holes 22 as shown in Fig. 4, and as shown in Fig. 5, (24), and may be formed in various shapes, and it is preferable that the metal layer is formed to be ½ or less of the total area of the metal layer.

Since the first metal layer 20 and the second metal layer 30 are formed of a metal thin film, there is a fear that the adhesive layer is laminated on the surface of the smooth metal layer, and the metal layer and the adhesive layer are peeled off. The total weight of the adhesive tape can be reduced by reducing the weight of the metal layer.

Therefore, if a plurality of through holes 22 are formed in the first metal layer 20 and the second metal layer 30, the adhesive material of the first conductive adhesive layer 40 can penetrate the through hole 22 of the first metal layer 20, And the adhesive material of the second conductive adhesive layer 40 flows into the through hole 22 of the second metal layer 30 to improve the adhesion between the metal layer and the adhesive layer.

When the through holes are formed in the first metal layer 20 and the second metal layer 30, the weight of the metal layer is reduced by the hole area, thereby reducing the overall weight of the adhesive tape.

A plurality of semicircular or semi-polygonal concave grooves 26 and 28 are formed on the side surfaces of the first metal layer 20 and the second metal layer 30 at regular intervals.

Since the concave grooves 26 and 28 are formed on the side surfaces of the first metal layer 20 and the second metal layer 30 as described above, burrs are formed when the first metal layer 20 and the second metal layer 30 are cut. And it is possible to prevent the adhesive material from flowing into the concave grooves 26 and 28 to prevent the edge portions from being lifted.

7 is a cross-sectional view of an adhesive tape according to a third embodiment of the present invention.

The adhesive tape according to the second embodiment comprises a partition layer 10 formed in the form of a nanowire by an electrospinning method, a first metal layer 20 laminated on one surface of the partition layer 10 and having thermal conductivity, A second metal layer 30 laminated on the other surface of the layer 10 and having thermal conductivity and electrical conductivity; a first conductive adhesive layer 40 laminated to the first metal layer 20; And a cushion layer (60) which is laminated on at least one of the first conductive adhesive layer (40) and the second conductive adhesive layer (50) to remove air bubbles while improving adhesive strength do.

The partition layer 10, the first metal layer 20, the second metal layer 30, the first conductive adhesive layer 40 and the second conductive adhesive layer 50 according to the second embodiment are the same as the first embodiment The first metal layer 20, the second metal layer 30, the first conductive adhesive layer 40, and the second conductive adhesive layer 50 described in the first embodiment, the detailed description thereof will be omitted.

8, the cushion layer 60 has a concavo-convex shaped emboss 64 formed on the surface of the substrate 62 to serve as a buffer to protect the component from vibration and the like, And the embossment 64 acts as a passage through which air can escape, thereby removing bubbles.

Here, the base material and the sticky material forming the cushion layer 60 are formed of a heat conductive or electrically conductive material.

The cushion layer 60 may be formed by forming an embossed embossed pattern on the surface of a base material and applying an adhesive to both sides of the base material having the embossed pattern formed thereon and using an embossed release paper to form an embossed pattern A method in which an adhesive layer is applied to a substrate and then an embossed shape is formed in the adhesive layer is also applicable.

9 is a cross-sectional view of a conductive adhesive tape having a heat radiation function according to a fourth embodiment of the present invention.

The conductive adhesive tape according to the fourth embodiment includes a plurality of partition layers 72, 74, and 76 formed in the form of a nano-web by an electrospinning method, and a plurality of layered layers 72, 74, A first conductive adhesive layer 40 laminated on one surface of the metal layer, a second conductive adhesive layer 50 laminated on the other surface of the metal layer, And a cushion layer (60) laminated on at least one of the layer (40) and the second adhesive layer (50) to remove bubbles while improving adhesive strength.

The conductive adhesive tape according to the third embodiment has a plurality of metal layers to improve the heat radiation performance and the shielding performance.

The first metal layer 82 and the second metal layer 84 may be formed as a first layer, a second layer and a third layer, A third metal layer 86, and a fourth metal layer 88. In this case,

10 is a configuration diagram of an electrospinning apparatus for manufacturing an adhesive tape having a heat radiation performance according to the first embodiment of the present invention.

The electrospinning apparatus according to the first embodiment of the present invention includes a mixing tank 170 in which an electrospun polymer material, a material having thermal conductivity and a solvent are mixed, a high-voltage generator connected to the mixing tank 170, A plurality of spinning nozzles 110 connected to the spinning nozzles 170 to form a partition layer and nanofibers 14 disposed below the spinning nozzles 110 and radiated from the spinning nozzles 110 are stacked, And a collector 130 that forms a collector.

The mixing tank 170 is provided with a stirrer 180 for uniformly mixing a polymer material, a thermally conductive material and a solvent, and maintaining a predetermined viscosity of the spinning solution.

A high voltage electrostatic force of 90 to 120 Kv is applied between the collector 130 and the spinning nozzle 110 so that the nanofibers 14 are emitted and the nanofibers 14 are collected on the collector 130 to form a nanoweb.

Each of the plurality of spinning nozzles 110 is provided with an air injection device 120 to prevent the nanofibers 14 radiated from the spinning nozzle 110 from being collected and collected by the collector 130.

A release film roll 140 wound with a release film 142 is disposed in front of the collector 130 to supply the release film 142 to the upper surface of the collector 130. In this case, the release film 142 may be provided with a release film 142 on which the first metal layer 20 or the second metal layer 30 is attached. In this case, the first metal layer 20 or the second metal layer 30 may be provided. The nanofibers are directly radiated on the surface of the partition wall 10 to form a nanofiber type partition layer 10.

A pressure roller 150 is provided behind the collector 130 to pressurize (calendale) the partition layer 150 in which the nanofibers are stacked by electrospinning to have a predetermined thickness. The pressure roller 150 And a sheet roll 160 on which a sheet on which the partition layer 10 having a predetermined thickness is laminated is provided.

The manufacturing process of the pressure-sensitive adhesive tape having the heat radiation function using the electrospinning device according to the first embodiment thus constructed will be described below.

First, when the collector 130 is driven, the release film 142 wound on the release film roll 140 is supplied to the collector 130.

By applying a high voltage electrostatic force between the collector 130 and the spinning nozzle 110, the spinning solution is made into the nanofibers 14 in the spinning nozzle 110 and is radiated onto the surface of the release film 142. Then, the nanofibers 14 are accumulated on the surface of the release film 142 to form the partition layer 10.

At this time, air is injected into the nanofibers 14 when the nanofibers 14 are radiated from the air injector 120 installed in the spinning nozzle 110 to collect the nanofibers 14 on the release film 110 And to be integrated.

The sheet on which the partition layer 10 is formed is pressed to a predetermined thickness while being passed through the pressure roller 150, and wound around the sheet roll 160.

Then, the first metal layer 20 and the second metal layer 30 are laminated on both sides of the partition layer 10, respectively. At this time, the first metal layer 20 and the second metal layer 30 are formed of a conductive metal thin film having a plurality of through holes 22 so that the heat dissipation performance and the electromagnetic shielding performance can be maintained while reducing the weight.

The first conductive adhesive layer 40 is attached to the first metal layer 20 and the second conductive adhesive layer 50 is attached to the second metal layer 30. Since the plurality of through holes 22 are formed in the first metal layer 20 and the second metal layer 30 so that the adhesive material of the first conductive adhesive layer 40 is penetrated through the through holes of the first metal layer 20 22 and the adhesive material of the second conductive adhesive layer 50 flows into the through hole 22 of the second metal layer 30 to improve the adhesive force.

When manufacturing the adhesive tape according to the third embodiment of the present invention, a cushion layer 60 previously prepared in at least one of the first conductive adhesive layer 40 and the second conductive adhesive layer 50 is laminated .

At this time, the cushion layer 60 has a heat-conducting or electrically conductive structure. That is, the base material and the adhesive material forming the cushion layer 60 are formed of a thermally conductive or electrically conductive material.

When the partition layer is formed by electrospinning the surface of the metal layer in the above electrospinning apparatus, a first partition layer is formed on the first metal layer, a second partition layer is formed on the second metal layer 30, It is also possible to prepare one partition layer and the second partition layer by laminating them together.

12 is a configuration diagram of an electrospinning device according to a second embodiment of the present invention.

The electrospinning apparatus according to the second embodiment is an electrospinning apparatus which is applied when electrospinning the adhesive layer or the metal layer together with the partition layer.

The electrospinning device according to the second embodiment is connected to a mixing tank in which an electrospun polymer material and a solvent-mixed spinning liquid are stored, and is connected to a high voltage generator to form a first metal layer 20 or a second metal layer 30 A plurality of first spinning nozzles 210 forming a partition layer 10 on one side and a plurality of nanofibers 14 disposed below the first spinning nozzle 210 and radiated from the first spinning nozzle 210, A first collector 230 disposed below the first collector 230 to form a first conductive adhesive layer (not shown) on the other surface of the first metal layer 20 or the second metal layer 30, A second spinneret 240 forming a first conductive adhesive layer 40 or a second conductive adhesive layer 50 and a nanofiber 14 disposed below the second spinneret 240 and radiated from the second spinneret 240, And a second collector 250 on which the first collector 250 and the second collector 250 are stacked.

A metal foil roll 260 in which a first metal layer 20 and a second metal layer 30 are formed is disposed in front of the first collector 230. A metal foil roll 260 is disposed in the rear of the second collector 250, There is provided a pressure roller 150 which pressurizes (calendering) the partition layer 10 in which nanofibers are laminated by radiation and the first conductive adhesive layer 40 or the second conductive adhesive layer 50 And a sheet roll 160 which is pressed while being passed through the pressure roller 150 to roll a sheet having a predetermined thickness.

The first spinning nozzle 210 and the second spinning nozzle 240 are provided with air injecting devices 220 and 242 respectively so that the nanofibers 14 radiated from the first spinning nozzle 210 and the second spinning nozzle 240 Thereby preventing the first collector 230 and the second collector 250 from being captured and being blown.

The manufacturing process of the pressure-sensitive adhesive tape having the heat radiation function using the electrospinning device according to the second embodiment thus constructed will be described below.

First, when the first collector 230 is driven, the first metal layer 20 wound around the metal foil roll 260 is supplied to the first collector 230.

By applying a high voltage electrostatic force between the first collector 230 and the first spinneret 210, the spinning solution is made into a microfine fiber in the first spinneret 210, do. Ultrafine fiber strands are accumulated on one surface of the first metal layer 20 to form a first partition layer.

When the first partition layer is formed on one surface of the first metal layer 10, a first conductive adhesive layer is formed on the other surface of the first metal layer.

That is, the first metal layer 10 on which the first partition layers are stacked is moved to the second collector 250. Since the second collector 250 is disposed on the lower side of the first collector 230, 20 are reversed 180 degrees and moved to the second collector 250. Then, the other surface of the first metal layer 20 faces upward. At this time, if the release film is adhered to the first metal layer 20, a step of peeling off the release film is further performed.

By applying a high voltage electrostatic force between the second collector 250 and the second spinneret 240, the conductive adhesive material is made into microfine fiber strands in the second spinneret 240 so as to spin on the other surface of the first metal layer 20 do. Then, microfine fiber strands are accumulated on the other surface of the first metal layer 20 to form a first conductive adhesive layer 40 in the form of an inorganic porous film.

The sheet on which the first conductive adhesive layer 40 has been adhered is pressed to a predetermined thickness while passing through the pressure roller 150, and then wound on the sheet roll 160.

The second partition layer is laminated on one surface of the second metal layer 30 and the second conductive adhesive layer 50 is laminated on the other surface of the second metal layer 30 by the same process.

Then, when the first partition layer and the second partition layer are mutually lapped, the production of the conductive adhesive tape is completed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the embodiments set forth herein. Various changes and modifications may be made by those skilled in the art.

10: partition layer 20: first metal layer
30: second metal layer 40: first conductive adhesive layer
50: second conductive adhesive layer 60: cushion layer

Claims (30)

A partition layer formed in a nano-web form by an electrospinning method;
A first metal layer stacked on one surface of the partition layer and having thermal conductivity;
A second metal layer stacked on the other surface of the partition layer and having electrical conductivity;
A first conductive adhesive layer laminated on the first metal layer; And
And a second conductive adhesive layer laminated on the second metal layer. The method according to claim 1,
The partition layer is formed by mixing an electrospun polymer material, a heat conduction material and a solvent at a predetermined ratio to prepare a spinning solution, electrospinning the spinning solution to form nanofibers, accumulating the nanofibers, Wherein the conductive adhesive tape has a heat radiation function. The method according to claim 1,
Wherein the partition layer is formed of an insulating layer for insulating between the first metal layer and the second metal layer. The method according to claim 1,
Wherein the partition layer is formed of a heat conduction layer to allow heat conduction between the first metal layer and the second metal layer. The method according to claim 1,
Wherein the first metal layer is a heat dissipation layer that dissipates heat generated by the component to dissipate heat. The method according to claim 1,
Wherein the second metal layer is an electromagnetic wave shielding layer that shields electromagnetic waves generated from the component. The method according to claim 1,
Wherein the thickness of the first metal layer is 5 to 10 占 퐉. The method according to claim 1,
Wherein the thickness of the second metal layer is 10 to 18 占 퐉. The method according to claim 1,
Wherein the first metal layer and the second metal layer have a weight reduced and a plurality of through holes through which the adhesive material of the first adhesive layer and the second adhesive layer are introduced are formed. 10. The method of claim 9,
Wherein the total area of the through holes is 50% or less of the area of the first metal layer and the second metal layer, and is formed in a circular or polygonal shape. 10. The method of claim 9,
Wherein a plurality of concave grooves filled with an adhesive material are formed at predetermined intervals on the side surfaces of the first metal layer and the second metal layer to prevent burrs when cutting the metal layer. The method according to claim 1,
The first metal layer is formed by mixing an electrospun polymer material, a thermally conductive material and a solvent at a predetermined ratio to prepare a spinning solution, electrospinning the spinning solution to form nanofibers, accumulating the nanofibers, wherein the conductive adhesive tape has a heat dissipating function. The method according to claim 1,
The second metal layer is formed by mixing an electrospun polymer material, an electromagnetic wave shielding material and a solvent at a predetermined ratio to prepare a spinning solution, electrospinning the spinning solution to form nanofibers, accumulating the nanofibers, wherein the conductive adhesive tape has a heat dissipating function. The method according to claim 1,
Wherein the first conductive adhesive layer is formed of a thermally conductive adhesive material to allow thermal conduction. The method according to claim 1,
Wherein the second conductive adhesive layer is formed of an electrically conductive adhesive material to allow electrical conduction. The method according to claim 1,
Wherein the first conductive adhesive layer and the second conductive adhesive layer are coated with an antioxidant for preventing oxidation of the first metal layer and the second metal layer. The method according to claim 1,
Wherein the first conductive adhesive layer is formed by mixing thermally conductive thermally conductive material, adhesive material, and solvent at a predetermined ratio to prepare a spinning solution, electrospinning the spinning solution to form nanofibers, accumulating the nanofibers, Wherein the conductive adhesive tape has a heat dissipating function. The method according to claim 1,
The second conductive adhesive layer is formed by mixing an electrically conductive material, an adhesive material, and a solvent to form a spinning solution having a viscosity suitable for electrospinning, electro spinning the spinning solution to form nanofibers, Wherein the conductive adhesive tape has a heat dissipating function. The method according to claim 1,
And a cushion layer laminated on at least one of the first conductive adhesive layer and the second conductive adhesive layer to improve adhesion and remove air bubbles. 20. The method of claim 19,
Wherein the cushion layer has an embossed pattern formed on the surface thereof to protect a component adhering to the cushion layer, to improve adhesive strength, and to serve as a passage through which the air escapes. A plurality of metal layers;
A plurality of partition layers which are laminated between the metal layers so as to partition the plurality of metal layers and are formed in the form of a nanoweb by an electrospinning method;
A first adhesive layer formed on one surface of the metal layer; And
And a second adhesive layer formed on the other surface of the metal layer. Electrospinning a polymer material to form a nanoweb-type partition layer;
Stacking a first metal layer and a second metal layer on both sides of the partition layer;
And laminating a first conductive adhesive layer on the first metal layer and a second conductive adhesive layer on the second metal layer. 23. The method of claim 22,
Wherein the partition layer is formed by spinning a spinning solution into nanofibers in a spinning nozzle, spinning the spinning solution onto a release film, and accumulating nanofibers in the release film to form a nanoweb. 23. The method of claim 22,
Wherein a plurality of holes are formed in the first metal layer and the second metal layer to flow into the holes in the first conductive adhesive layer and the second conductive adhesive layer. 23. The method of claim 22,
Wherein the thickness of the first metal layer is 5 to 10 占 퐉 and the thickness of the second metal layer is 10 to 18 占 퐉. 23. The method of claim 22,
Further comprising laminating a cushion layer on the surface of which at least one of the first conductive adhesive layer and the second conductive adhesive layer has been formed with embossed embossments on the surface thereof. Forming a first partition layer in the form of a nano-web by electrospinning a polymer material on one surface of the first metal layer;
Forming a first conductive adhesive layer on the other surface of the first metal layer by electrospinning a conductive adhesive material;
Forming a second partition layer in the form of a nanoweb by electrospinning a polymer material on one surface of the second metal layer;
Forming a second conductive adhesive layer by electrospunning a conductive adhesive material on the other surface of the second metal layer; And
And bonding the first partition layer and the second partition layer to each other. 28. The method of claim 27,
Wherein the first metal layer and the second metal layer are formed of a conductive metal thin film having a plurality of holes. 28. The method of claim 27,
Wherein the first metal layer and the second metal layer are formed in the form of a nanoweb having a plurality of pores by electrospinning a conductive material. 28. The method of claim 27,
Further comprising laminating a cushion layer on the surface of which at least one of the first conductive adhesive layer and the second conductive adhesive layer has been formed with embossed embossments on the surface thereof.

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