KR101729006B1 - Radiating sheet including carbon fibers, manufacturing method thereof and manufacturing equipment thereof - Google Patents
Radiating sheet including carbon fibers, manufacturing method thereof and manufacturing equipment thereof Download PDFInfo
- Publication number
- KR101729006B1 KR101729006B1 KR1020150104218A KR20150104218A KR101729006B1 KR 101729006 B1 KR101729006 B1 KR 101729006B1 KR 1020150104218 A KR1020150104218 A KR 1020150104218A KR 20150104218 A KR20150104218 A KR 20150104218A KR 101729006 B1 KR101729006 B1 KR 101729006B1
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- KR
- South Korea
- Prior art keywords
- film
- carbon fiber
- heat
- carbon
- radiating sheet
- Prior art date
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
- H05K7/20436—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing
- H05K7/20445—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing the coupling element being an additional piece, e.g. thermal standoff
- H05K7/20472—Sheet interfaces
- H05K7/20481—Sheet interfaces characterised by the material composition exhibiting specific thermal properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
- B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Carbon And Carbon Compounds (AREA)
- Laminated Bodies (AREA)
Abstract
The present invention relates to a heat-radiating sheet containing carbon fibers, a method of manufacturing the same, and an apparatus for manufacturing the same. The heat-radiating sheet including the carbon fiber of the present invention includes a carbon fiber layer spread in a planar form; An adhesive layer applied to the spread carbon fiber to fix the carbon fiber; And a film layer in the form of a surface in the form of carbon which is supplied and attached to the adhesive layer. The heat-radiating sheet including the carbon fiber of the present invention, the method for producing the same, and the apparatus for manufacturing the same can improve the smoothness of the surface of the heat-radiating sheet, and have excellent thermal conductivity and effective heat dissipation. In addition, a heat-radiating sheet can be formed using a thin film, which is applicable to slim products such as mobile phones and notebooks. In addition, the adhesion of the polyimide film can be improved by further adding carbon nanotubes or carbon black.
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a heat-radiating sheet containing carbon fibers, a method of manufacturing the same, and a manufacturing apparatus thereof, and more particularly, to a heat-radiating sheet including carbon fibers for heat- .
Carbon fibers are most widely used as reinforcing agents for advanced composite materials because of their excellent mechanical properties such as non-strength and nonelasticity. In addition to sports applications such as golf clubs and fishing rods, such carbon fiber applications are being developed for general industrial use such as aircraft, automobile members, compressed natural gas tanks, seismic reinforcing members for dried products, and ship members. And accordingly the level of mechanical properties required is increasing. For example, in aircraft applications, most of the structural members are replaced by carbon fiber reinforced plastics for light weight, and therefore carbon fibers compatible at high levels of compression strength and tensile modulus are required.
Recently, a heat-radiating sheet formed in a sheet form in an electronic product is included to utilize the high thermal conductivity of carbon fiber. The complexity of devices such as televisions, computers, office machines, and communication devices is increasing. Particularly, as electronic components become more complicated, the area is gradually reduced due to miniaturization and high performance, so that the number of electronic components to be assembled increases, while the shape of the component itself is miniaturized. Thus, there is a growing need to effectively remove the heat generated to prevent failures or failures caused by the increase in heat generated in each electronic component. Particularly, small electronic appliances such as mobile phones, tablet PCs, notebooks, etc., must be formed as thin films, while quickly and efficiently dissipating heat. Therefore, a heat-radiating sheet for use in a small-sized electronic product must have a high thermal conductivity while being a thin film.
In general, a heat-radiating sheet using carbon fiber is prepared by melting an adhesive liquid such as a solvent for adhesion to a stretched carbon fiber, coating it, hardening it, and carbonizing and graphitizing it. At this time, a step for smoothing the surface is required in the process of injecting the adhesive liquid for adhesion and drying, and generally a roller is used. However, there is such a disadvantage that the adhesive liquid does not adhere to the roller or the surface is not uniformly treated during the surface treatment using the roller. If the surface is not uniformly treated, the thermal conductivity is lowered in the horizontal direction, and the heat radiation efficiency is lowered.
It is an object of the present invention to provide a heat-radiating sheet including carbon fibers in which heat transfer in a horizontal direction is efficiently performed by increasing the surface smoothness of the heat-radiating sheet using carbon fibers and polyimide films, and a manufacturing method and apparatus thereof.
According to an aspect of the present invention, there is provided a heat-radiating sheet including carbon fiber, a method of manufacturing the heat-radiating sheet, and a manufacturing apparatus. The heat-radiating sheet including the carbon fiber of the present invention includes a carbon fiber layer spread in a planar form; An adhesive layer applied to the spread carbon fiber to fix the carbon fiber; And a film layer in the form of a surface in the form of carbon which is supplied and attached to the adhesive layer.
In one embodiment, the film layer is any one of a polyimide film, a meta-aramid film, and a para-aramid film.
In one embodiment, the adhesive layer comprises any one of phenol, polyimide, polyacrylonitrile, and aramid.
In one embodiment, the heat-radiating sheet further includes a second adhesive layer for enhancing an adhesive force between the polyimide film and the adhesive layer.
In one embodiment, the second adhesive layer includes any one of carbon nanotube and carbon black.
A method of manufacturing a heat-radiating sheet including carbon fiber according to the present invention includes: spreading a carbon fiber bundle in a planar form; Preparing a planar film by carbonization; Applying an adhesive to the spread carbon fiber; Laminating the carbonized film to the carbon fiber to which the adhesive is applied; Carbonizing the laminated carbon fiber sheet; And graphitizing the carbonized carbon fiber sheet.
In one embodiment, in the carbon fiber spreading step, the carbon fibers are spread through the gas.
In one embodiment, the film is one of a polyimide film, a meta-aramid film, or a para-aramid film.
An apparatus for manufacturing a heat-radiating sheet including carbon fibers according to the present invention comprises: a spreading device for spreading a bundle-shaped carbon fiber in a planar form; A film supply module for carbonizing and supplying the film; A laminating module for adhering the film; A carbonization module for carbonizing the laminated carbon fiber and the film; And a graphitization module for graphitizing the carbonized carbon fibers and the film.
In one embodiment, the spreading device includes an air duct for separating bundle-shaped carbon fibers into filaments using a gas.
In one embodiment, the film is one of a polyimide film, a meta-aramid film, or a para-aramid film.
The heat-radiating sheet including the carbon fiber of the present invention, the method for producing the same, and the apparatus for manufacturing the same can improve the smoothness of the surface of the heat-radiating sheet, and have excellent thermal conductivity and effective heat dissipation. In addition, a heat-radiating sheet can be formed using a thin film, which is applicable to slim products such as mobile phones and notebooks. In addition, the adhesion of the polyimide film can be improved by further adding carbon nanotubes or carbon black.
1 is a block diagram showing a configuration of an apparatus for manufacturing a heat radiation sheet according to a preferred embodiment of the present invention.
2 is a view showing a structure of a heat-radiating sheet according to a first embodiment of the present invention.
3 and 4 are a perspective view and a side view showing the heat radiation sheet producing apparatus.
5 is a flowchart showing a method for manufacturing a heat radiation sheet.
6 and 7 are views showing a carbon fiber spreading apparatus.
8 is a view showing a structure of a heat radiation sheet according to a second embodiment of the present invention.
For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that the same components are denoted by the same reference numerals in the drawings. Detailed descriptions of well-known functions and constructions which may be unnecessarily obscured by the gist of the present invention are omitted.
1 is a block diagram showing a configuration of an apparatus for manufacturing a heat radiation sheet according to a preferred embodiment of the present invention.
1, an
The carbon
The
The
The
The polyimide film is a high-temperature, high-functional industrial material that can withstand temperatures as high as 400 degrees Celsius or below 269 degrees Celsius and is thin and flexible. It has strong chemical resistance and abrasion resistance and is widely used in areas that require stable performance in harsh environments. Initially developed and used as materials for the aerospace industry, it is now used in a wide range of fields such as industrial equipment, flexible printed circuit boards (FPCB), and electrical and electronic components. In recent years, the demand for polyimide films for heat-radiating sheets has been increasing in order to solve heat problems as the performance of information technology (IT) devices has become more diverse and thinner all over the world. Hereinafter, a process for producing a heat-radiating sheet containing carbon fibers using a polyimide film will be described.
The
The
The
The
2 is a view showing a structure of a heat-radiating sheet according to a first embodiment of the present invention.
2, the heat-radiating
The heat-radiating
FIGS. 3 and 4 are a perspective view and a side view showing a heat radiation sheet production apparatus, and FIG. 5 is a flow chart showing a heat radiation sheet production method.
3 to 5, the
6 and 7 are views showing a carbon fiber spreading apparatus.
Referring to FIG. 6, the spreading
Referring to FIG. 7, the
8 is a view showing a structure of a heat radiation sheet according to a second embodiment of the present invention.
Referring to Fig. 8, the heat-radiating
The embodiments of the heat-radiating sheet including the carbon fiber of the present invention, the method of manufacturing the same, and the apparatus for manufacturing the heat-radiating sheet of the present invention described above are merely illustrative and those skilled in the art can make various changes and modifications It will be appreciated that other equivalent embodiments are possible.
Accordingly, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
100: Heat-radiating sheet manufacturing apparatus 101: Carbon fiber
102: guide roller 103: carbon fiber bundle
105: carbon fiber supply part 107: film supply part
109: Carbonization module 110: Spreading device
112: frame 114: guide roller
116: Air duct 117: Injection nozzle
120: adhesive supply module 124: first adhesive layer
126: second adhesive layer 130: laminating module
132: Rolling roller 140: Drying module
150: carbonization module 160: graphitization module
170: storage module 180: polyimide film
182: Carbonated
Claims (11)
An adhesive layer applied on one side of the spread carbon fiber layer to fix the carbon fiber; And
And a film layer in the form of a planar surface which is carbonized and supplied and laminated and adhered to the adhesive layer,
Wherein the carbon fiber layer, the adhesive layer, and the film layer bonded together are carbonized and graphitized.
Wherein the film layer is one of a polyimide film, a meta-aramid film, and a para-aramid film.
Wherein the heat-radiating sheet further comprises a second adhesive layer for enhancing an adhesive force between the film layer and the adhesive layer.
Wherein the second adhesive layer comprises any one of carbon nanotubes and carbon black.
Preparing a planar film by carbonization;
Applying an adhesive to one side of the spread carbon fiber;
Laminating the carbonized film to the carbon fiber to which the adhesive is applied;
Carbonizing the laminated carbon fiber sheet; And
A method for producing a heat-radiating sheet comprising carbon fiber, comprising the step of graphitizing a carbonized carbon fiber sheet.
Wherein the film is one of a polyimide film, a meta-aramid film, and a para-aramid film.
A film supply module for carbonizing and supplying the film;
A laminating module for adhering the film;
A carbonization module for carbonizing the laminated carbon fiber and the film; And
And a graphitization module for graphitizing the film with carbonized carbon fibers,
The spreading device includes a frame;
A plurality of guide rollers for supporting the carbon fibers in the frame and moving the carbon fibers spread in a plane;
An air duct provided at an upper portion or a lower portion of the carbon fiber bundle; And
And a plurality of injection nozzles linearly provided in the air duct and through which gas is injected.
Wherein the film is one of a polyimide film, a meta-aramid film, and a para-aramid film.
Priority Applications (1)
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KR1020150104218A KR101729006B1 (en) | 2015-07-23 | 2015-07-23 | Radiating sheet including carbon fibers, manufacturing method thereof and manufacturing equipment thereof |
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KR1020150104218A KR101729006B1 (en) | 2015-07-23 | 2015-07-23 | Radiating sheet including carbon fibers, manufacturing method thereof and manufacturing equipment thereof |
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KR20170011501A KR20170011501A (en) | 2017-02-02 |
KR101729006B1 true KR101729006B1 (en) | 2017-05-02 |
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Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101971220B1 (en) * | 2017-12-07 | 2019-04-22 | 한국세라믹기술원 | METHOD OF FABRICATING FIBROUS SiC SURFACE HEATING ELEMENT FOR INFRARED RADIATION |
KR102094925B1 (en) * | 2018-05-03 | 2020-03-30 | 에스케이씨 주식회사 | Multilayer graphite sheet having excellent electromagnetic shielding property and thermal conductivity, and preparation method thereof |
SE543441C2 (en) * | 2019-03-26 | 2021-02-16 | Centropy Ab | Heat transfer device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000016808A (en) * | 1998-04-28 | 2000-01-18 | Matsushita Electric Ind Co Ltd | Method and apparatus for producing graphite sheet having flexibility |
JP2015000553A (en) * | 2013-06-18 | 2015-01-05 | トヨタ自動車株式会社 | Filament winding device |
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2015
- 2015-07-23 KR KR1020150104218A patent/KR101729006B1/en active IP Right Grant
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000016808A (en) * | 1998-04-28 | 2000-01-18 | Matsushita Electric Ind Co Ltd | Method and apparatus for producing graphite sheet having flexibility |
JP2015000553A (en) * | 2013-06-18 | 2015-01-05 | トヨタ自動車株式会社 | Filament winding device |
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