CN203912428U

CN203912428U - Composite heat-conduction graphite flake

Info

Publication number: CN203912428U
Application number: CN201420118094.8U
Authority: CN
Inventors: 吴志乐
Original assignee: XIAMEN HENGKUN NEW MATERIAL TECHNOLOGY Co Ltd
Current assignee: XIAMEN HENGKUN NEW MATERIAL TECHNOLOGY Co Ltd
Priority date: 2014-03-13
Filing date: 2014-03-13
Publication date: 2014-10-29
Anticipated expiration: 2024-03-13

Abstract

The utility model discloses a composite heat-conduction graphite flake, which mainly comprises essentially arranged four layers, namely a release film layer, a heat-conduction pressure sensitive adhesive layer, a graphite flake layer and a heat-insulation foaming layer. According to the technical scheme of the utility model, the composite heat-conduction graphite flake is characterized in that a graphite flake and a heat-insulation foaming layer are integrated together, wherein the graphite flake is high in two-dimensional heat-conduction performance. In this way, not only the two-dimensional heat-conduction performance of the graphite flake can be better realized, but also a good heat-conduction channel is provided. Meanwhile, the good buffer effect of the heat-insulation foaming layer is realized, and the strength of the graphite flake is improved. Furthermore, the bending performance of the composite heat-conduction graphite flake is improved, and the subsequent machining performance thereof is increased.

Description

A kind of composite heat-conducting graphite flake

Technical field

The utility model relates to the applied technical field of conductive graphite sheet, particularly relates to a kind of conductive graphite sheet for notebook computer.

Background technology

Along with the development to high integration of electronic device and product, dissipation power doubles thereupon, and heat radiation becomes a difficult problem urgently to be resolved hurrily day by day, and heat dissipation problem is one of bottleneck limiting this field development.

Graphite flake has good heat conductivility, and synthetic graphite sheet thermal conductivity is up to 1500W/mk, and far above metals such as metallic copper aluminium, and to have the thermal conduction characteristic that other Heat Conduction Materials do not possess be two-dimentional heat conduction directivity, and good passage of heat is provided on two-dimensional surface.Yet there are some problems in the application of graphite flake: graphite flake is frangible, poor toughness, intensity is low, is prone to dry linting and phenomenon of rupture, may cause functional fault etc.; In addition, the processing cost of high-quality graphite flake is higher.

Utility model content

The problem that the utility model solves is to provide a kind of composite heat-conducting graphite flake, and this graphite flake structural design is novel, by graphite linings and heat insulation foaming layer, is composited.Heat insulation foaming layer is that Foamex forms at graphite flake one surface blister, has strengthened graphite flake toughness and intensity, has effectively solved the problems such as its dry linting and fracture.

In order to address the above problem, the technical solution adopted in the utility model is:

The utility model provides a kind of composite heat-conducting graphite flake, is mainly divided into four layers, respectively is release film layer, heat conduction pressure-sensitive adhesive layer, graphite flake layer and heat insulation foaming layer.

Further, and the heat conduction pressure sensitive adhesive of described a kind of composite heat-conducting graphite flake (a class good heat conductive performance, and pressure is had to the adhesive of sensitiveness) layer thickness 5～100 μ m.

Further, the graphite flake layer of described a kind of composite heat-conducting graphite flake is synthetic graphite or native graphite, and thickness is 20～300 μ m;

Further, the heat insulation foaming layer of described a kind of composite heat-conducting graphite flake is to be formed by Foamex foaming; Its thickness can be processed according to product requirement.

The processing technology of the utility model composite heat-conducting graphite is as follows: the graphite flake of a. preparation certain specification, and stand-by; B. Foamex is mixed, graphite flake wherein a surface-coated one deck prepare Foamex, stand-by; C. graphite flake step 2 being obtained is positioned in baking box, and certain temperature heated baking is set, and Foamex starts foaming, forms the uniform expanded material of a layer thickness, and this expanded material and graphite flake form composite material; D. utilize laminating machine the heat conduction pressure sensitive adhesive that posts release liners to be attached to the nonfoamed layer of graphite flake.

Compared with prior art, the advantage of technical solutions of the utility model is:

The innovative point of the utility model structural design is that high conductive graphite sheet and the heat insulation foaming layer with two-dimentional heat conductivility are combined, this structure exists the heat insulation foaming layer of following advantage: a. to play heat-blocking action, the directivity that the conduction of heat is had, heat conducts on two-dimension graphite sheet, forms good passage of heat; B. good cushioning effect is brought into play in heat insulation foaming layer, has reduced graphite flake because of the probability that miscellaneous part compressing damages, and meets more application requirements; C. heat insulation foaming layer and heat conduction pressure-sensitive adhesive layer have increased graphite flake intensity, have improved its toughness and bending property, are convenient to follow-up cross cutting processing.

In a word, the utility model composite stone ink sheet, has successfully solved low frangible, the dry linting causing of graphite flake intensity, the problem such as easily broken; Its production process is succinct, and the cycle is short, and production cost reduces, and has effectively guaranteed product quality.

Accompanying drawing explanation

Fig. 1 is the cross-sectional view of the utility model product.

Fig. 2 is the utility model specific embodiment overall structure schematic diagram.

Fig. 3 is the utility model specific embodiment functional schematic.

Main symbol description:

Off-style paper layer 1

Heat conduction pressure-sensitive adhesive layer 2

Graphite linings 3

Heat insulation foaming layer 4

Composite heat-conducting graphite flake 5

Heater 6

Fan 7

Section View direction A

Embodiment

Example: a kind of notebook computer conductive graphite sheet

Shown in Fig. 1 and Fig. 2, a kind of notebook computer mainly comprises four layers with conductive graphite sheet, respectively is release film layer 1, heat conduction pressure-sensitive adhesive layer 2, graphite flake layer 3 and heat insulation foaming layer 4.

The heat conduction pressure-sensitive adhesive layer 2 of the composite heat-conducting graphite flake in described example is the adhesive tape with release film 1, and its thickness is 25 μ m.

Described graphite linings 3 is synthetic graphite, and thermal conductivity is up to 1200W/mk, its thickness 80 μ m;

Described heat insulation foaming layer 4 compositions are polyurethane foam resin, and after foaming, thickness is 2mm.

The processing technology of this composite heat-conducting graphite is as follows: the graphite flake 3 of a. preparation certain specification, and stand-by; B. on graphite flake 3 one surfaces, be evenly coated with one deck polyurethane foam resin, stand-by; C. the graphite flake obtaining in step 2 is positioned in baking box, 60 ℃ of heated bakings of set temperature, Foamex starts foaming, forms the heat insulation foaming layer 4 of one deck, and this heat insulation foaming layer 4 is adhering on graphite flake layer; D. utilize laminating machine the heat conduction pressure sensitive adhesive 2 that posts release liners 1 to be overlayed on to the nonfoamed layer of graphite flake; E. according to corresponding size specification, carry out cross cutting, obtain the composite heat-conducting graphite flake 5 for notebook computer.While using this composite heat-conducting graphite flake 5, only release film 1 need to be torn off, heat conduction pressure sensitive adhesive face 2 is overlayed on heater 6.This composite heat-conducting graphite flake 5 can conduct heat in graphite linings 3 on the one hand, and conducts at radiator place by passage of heat, sheds, as shown in Figure 3 under the help of fan 7 and then heat.

Certainly, described composite heat-conducting graphite flake, according to actual needs, can also increase or other retes, to increase its what's new.

In a word; although the utility model with better enforcement openly as above; but it is not for limiting the utility model; any those skilled in the art are not departing from spirit and scope Inner of the present utility model; can make possible change and modification, the scope that therefore protection range of the present utility model should be defined with the utility model claim is as the criterion.

Claims

1. a composite heat-conducting graphite flake, is characterized in that, described composite heat-conducting graphite flake is comprised of release film layer, heat conduction pressure-sensitive adhesive layer, graphite flake layer and heat insulation foaming layer successively.

2. a kind of composite heat-conducting graphite flake according to claim 1, is characterized in that, described heat conduction pressure sensitive adhesive thickness 5～100 μ m.

3. a kind of composite heat-conducting graphite flake according to claim 1, is characterized in that, described heat insulation foaming layer is to be formed by the foaming of Foamex glue.