CN203353018U - Graphite sheet - Google Patents
Graphite sheet Download PDFInfo
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- CN203353018U CN203353018U CN 201320238566 CN201320238566U CN203353018U CN 203353018 U CN203353018 U CN 203353018U CN 201320238566 CN201320238566 CN 201320238566 CN 201320238566 U CN201320238566 U CN 201320238566U CN 203353018 U CN203353018 U CN 203353018U
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- Prior art keywords
- protective film
- graphite
- film layer
- layers
- layer
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Abstract
The utility model discloses a graphite sheet. The graphite sheet comprises an upper protective film layer, a graphite base material layer, a lower protective film layer and a double-sided adhesive layer in sequence from up to down and thermosensitive glues are tightly bonded between the adjacent layers. The dimensions of the upper protective film layer, the lower protective film layer and the double-sided adhesive layer are all larger than the dimension of the graphite base material layer, and edges of the upper protective film layer, the lower protective film layer and the double-sided adhesive layer are bonded to each other. By adopting the above method, heat-conductive graphite base materials are completely coated by upper and lower tape layers so that sulphur-containing components of the graphite base materials fail to volatilize or contact with the outside, the damage of the sulphur-containing components to electronic components is eliminated, and the viscous force between layers of the product is better so that the layers do not easily fall off and the graphite base materials are not easy to crumble during processing.
Description
Technical field
The utility model relates to heat radiation Heat Conduction Material application, particularly relates to the graphite flake that a kind of heat conduction of dispelling the heat is used.
Background technology
In recent years, development along with electronic technology, electronic product is constantly updated and is regenerated, the size of its work package is more and more less, speed and the efficiency of work are more and more higher, and its caloric value is also increasing, therefore not only require it to be equipped with corresponding heat abstractor, also to guarantee that heat abstractor has stronger heat-sinking capability, with the reliability that guarantees properties of product with extend its useful life.The graphite radiating Heat Conduction Material, because its distinctive low-density (with respect to metal species) and high heat radiation conductive coefficient and low thermal resistance become the preferred material that the hyundai electronics series products solves heat radiation heat conduction technology.Graphite heat radiation fin not only can be along horizontal heat conduction, and vertically heat conduction is especially used laminar structuredly, not only can make better its surface that is applicable to any product, also can effectively play the effect of heat radiation heat conduction.Graphite flake of the prior art is of a great variety, but be generally the one side laminating polyester film two-sided tape adopted at graphite matrix, the polyester film of another side laminating one-side band glue, directly be processed into finished product, and the naked dew of the structure sheaf section of the graphite matrix in this graphite flake outside contacts with air; Because the structure sheaf section contacts with air, easily cause the sulphur in graphite matrix volatilize and cause the components and parts infringement; And, because graphite matrix is frangible, intensity difference, easily cause the cracked phenomenon in layering and processing.In addition, in prior art, in the processing of graphite flake, in order to increase the thermal conductivity of product, all select very thin adhesive layer, finally cause that the viscosity of the bonding polyester film in graphite substrate and two sides is poor easily to come off.
The utility model content
For above-mentioned deficiency of the prior art, the utility model main purpose provides a kind of graphite flake, can make the graphite substrate of heat conduction be wrapped up fully by upper and lower adhesive tape layer, make the sulfur-bearing composition in graphite substrate can not evaporate or contact with the external world, stopped the infringement of sulfur-bearing composition to electronic devices and components; And the better difficult drop-off of viscous force between each layer of product, work in-process is not easy to cause graphite substrate cracked.
For achieving the above object, the technical solution adopted in the utility model is: a kind of graphite flake from top to bottom comprises successively: upper protective film layer, graphite substrate layer, lower protective film and layers of two-sided; Pass through the pressure sensitive adhesive close adhesion between described adjacent layer; The size of described upper protective film layer, lower protective film and layers of two-sided all is greater than the size of described graphite substrate layer; Described upper protective film layer is mutually bonding with the edge of described lower protective film, layers of two-sided.
Preferably, be added with conductive powder in described pressure sensitive adhesive.
Preferably, described conductive powder is a kind of in aluminum nitride powder, nickel powder, graphite powder, silver powder, copper powder.For increasing the heat-conducting effect of graphite flake, be added with electric conductivity metal dust preferably in the pressure sensitive adhesive in the graphite flake in the utility model.
Preferably, described upper protective film layer is laminated polyester film.
Preferably, described lower protective film is laminated polyester film.
Preferably, described layers of two-sided is the laminated polyester film that two sides is covered with pressure sensitive adhesive.
Upper protective film layer in the utility model and lower protective film can also adopt metal foil material to make, and utilize metal forming to increase heat-transfer rate.
In the utility model because upper protective film layer, lower protective film and layers of two-sided that the graphite substrate layer of heat conduction is adhered to by its two sides wrap up fully, make the sulfur-bearing composition in the graphite substrate layer can not evaporate or contact with the external world, stopped the infringement of sulfur-bearing composition to electronic devices and components; And, because there is the two membranes protection below of graphite substrate layer, can not cause like this separating of graphite linings and lower protective film when peeling off layers of two-sided.Graphite flake with binding structure of the present utility model, due to the area that has increased graphite substrate two side forms, make the better difficult drop-off of viscous force between rete and rete, and work in-process is not easy to cause graphite substrate cracked.
The beneficial effects of the utility model are: the utility model graphite flake good heat conduction effect, and the sulfur-bearing composition in the graphite substrate layer is not volatile, and graphite substrate is subject to the protection of upper and lower diaphragm, and between rete, cementability is good, is beneficial to processing.
The accompanying drawing explanation
Fig. 1 is the structural representation of the utility model graphite flake one preferred embodiment;
In accompanying drawing, the mark of each parts is as follows: 1-upper protective film layer, 2--graphite substrate layer, protective film under 3-, 4-layers of two-sided.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail, thereby so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that, protection range of the present utility model is made to more explicit defining.
Refer to Fig. 1, the utility model embodiment mono-: a kind of graphite flake from top to bottom comprises successively: upper protective film layer 1, graphite substrate layer 2, lower protective film 3 and layers of two-sided 4; Pass through the pressure sensitive adhesive close adhesion between described adjacent layer; The size of described upper protective film layer 1, lower protective film 3 and layers of two-sided 4 all is greater than the size of described graphite substrate layer 2; Described upper protective film layer 1 is mutually bonding with the edge of described lower protective film 3, layers of two-sided 4.
For increasing the thermal conductivity of product, be added with the aluminum nitride powder of heat conduction in the present embodiment in pressure sensitive adhesive used.
In the present embodiment, described upper protective film layer 1 and lower protective film 3 all adopt the polyester film material to make.
In the present embodiment, described layers of two-sided 4 is laminated polyester films that two sides is covered with pressure sensitive adhesive.
Embodiment bis-: the difference of the present embodiment and embodiment mono-is: the nickel powder that is added with heat conduction in the present embodiment in pressure sensitive adhesive used.
Embodiment tri-: the difference of the present embodiment and embodiment mono-is: the copper powder that is added with heat conduction in the present embodiment in pressure sensitive adhesive used.
Embodiment tetra-: the difference of the present embodiment and embodiment mono-is: the graphite powder that is added with heat conduction in the present embodiment in pressure sensitive adhesive used.
Embodiment five: the difference of the present embodiment and embodiment mono-is: the silver powder that is added with heat conduction in the present embodiment in pressure sensitive adhesive used.
Embodiment six: the difference of the present embodiment and embodiment mono-is: the upper protective film layer 1 in the present embodiment and lower protective film 2 all adopt metal foil material to make, and utilize metal forming to increase heat-transfer rate.
The foregoing is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present utility model.
Claims (6)
1. a graphite flake, is characterized in that, from top to bottom comprises successively: upper protective film layer, graphite substrate layer, lower protective film and layers of two-sided; Pass through the pressure sensitive adhesive close adhesion between described adjacent layer; The size of described upper protective film layer, lower protective film and layers of two-sided all is greater than the size of described graphite substrate layer; Described upper protective film layer is mutually bonding with the edge of described lower protective film, layers of two-sided.
2. graphite flake according to claim 1, is characterized in that, in described pressure sensitive adhesive, is added with conductive powder.
3. graphite flake according to claim 2, is characterized in that, described conductive powder is a kind of in aluminum nitride powder, nickel powder, graphite powder, silver powder, copper powder.
4. according to arbitrary described graphite flake in claim 1-3, it is characterized in that, described upper protective film layer is laminated polyester film.
5. according to arbitrary described graphite flake in claim 1-3, it is characterized in that, described lower protective film is laminated polyester film.
6. according to arbitrary described graphite flake in claim 1-3, it is characterized in that, described layers of two-sided is the laminated polyester film that two sides is covered with pressure sensitive adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320238566 CN203353018U (en) | 2013-05-06 | 2013-05-06 | Graphite sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320238566 CN203353018U (en) | 2013-05-06 | 2013-05-06 | Graphite sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203353018U true CN203353018U (en) | 2013-12-18 |
Family
ID=49752859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320238566 Expired - Fee Related CN203353018U (en) | 2013-05-06 | 2013-05-06 | Graphite sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203353018U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106961821A (en) * | 2017-04-12 | 2017-07-18 | 东华大学 | A kind of synthetic graphite fin of sandwich structure |
| CN108749177A (en) * | 2018-05-08 | 2018-11-06 | 中山大学 | A kind of pyrolytic graphite/epoxy resin/ultra-high molecular weight polyethylene sandwich structure composite material and preparation method |
-
2013
- 2013-05-06 CN CN 201320238566 patent/CN203353018U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106961821A (en) * | 2017-04-12 | 2017-07-18 | 东华大学 | A kind of synthetic graphite fin of sandwich structure |
| CN108749177A (en) * | 2018-05-08 | 2018-11-06 | 中山大学 | A kind of pyrolytic graphite/epoxy resin/ultra-high molecular weight polyethylene sandwich structure composite material and preparation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131218 Termination date: 20160506 |