CN115284711A - Ultra-wide AFG material with high heat dissipation capacity - Google Patents
Ultra-wide AFG material with high heat dissipation capacity Download PDFInfo
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- CN115284711A CN115284711A CN202210936759.5A CN202210936759A CN115284711A CN 115284711 A CN115284711 A CN 115284711A CN 202210936759 A CN202210936759 A CN 202210936759A CN 115284711 A CN115284711 A CN 115284711A
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- afg
- wide
- heat dissipation
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- high heat
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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
- B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
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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
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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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
- 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
- B32B37/1284—Application of adhesive
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
Abstract
The invention discloses a super-wide AFG material with high heat dissipation capacity, wherein a substrate is an AFG material, transparent PET release films are coated on the upper surface and the lower surface of the substrate, the thickness of each transparent PET release film is 2-3 times of that of the substrate, and the transparent PET release films are connected with the AFG material through an adhesive; the invention aims to reduce the internal clearance of a final formed product by rolling, local heating and other modes, and can reduce the clearance of a contact surface to the minimum to the maximum extent by slightly melting the PET material, attaching the slightly melted PET surface to the surface of the AFG and rolling, thereby improving the interlayer heat conductivity, compensating the defect of insufficient transverse heat conductivity of the AFG material and providing a foundation for the preparation and production of the ultra-wide AFG material.
Description
Technical Field
The invention relates to an ultra-wide AFG material with high heat dissipation capacity.
Background
With the improvement of the computation of components such as smart phones, ultraphones, liquid crystal displays and the like, the internal heat dissipation requirements are gradually increased.
The market is often to the needs of above-mentioned product with ultra-thin, ultralight as the owner, this has just caused the installation space who leaves the heat dissipation part less and less to because each part produces thermal ability difference among the electronic equipment, so to the research and development personnel, can also carry out effectual soaking design through the soaking board, reduce the heat dissipation degree of difficulty.
At present, research and development of AFG materials are in a starting stage, and research and development and preparation of ultra-wide AFG materials with the width of about 1.2m are difficult. The microstructure unit of the AFG material is a graphite sheet layer structure, a high-activity heat conduction region composed of conjugated electrons and capable of moving exists on the graphite sheet layer, and van der Waals acting force which is weaker than that of a non-metallic covalent bond exists between the graphite sheet layers. The heat conduction mechanism is between a metal material and a non-metal material, has phonon heat conduction and electronic heat conduction, and provides thinner and more excellent heat dissipation design for electronic equipment. However, when the existing AFG material is prepared to be more than 1m wide, the problems of easy fracture, serious reduction of heat conductivity coefficient at the edge, large area temperature difference, long heat conduction time, low bending resistance and the like exist. On one hand, the problems are caused by that parameters of production equipment are not supported, and on the other hand, when the AFG material is prepared in a wide width mode, the transverse heat conduction capability of the AFG material is limited, and the interlayer heat conduction quantity cannot meet the requirement of transverse heat conduction at the same time.
However, in practical use, in order to ensure the use of medium-and large-sized components, such as ultra-pole substrates, flat panels, and soaking requirements of large-sized liquid crystal display screens, AFG materials with a width of about 1.2m are required for the overall covering of the rear panel.
The invention content is as follows:
the invention aims to solve the defects of the prior art, and provides an ultra-wide AFG material with high heat dissipation capacity in a mode of supplementing the defect of insufficient transverse heat dissipation capacity by stacking layers and further strengthening the heat dissipation capacity between the layers.
The utility model provides a super wide type AFG material of high heat-sinking capability, the realization of main inside heat conduction function is through current AFG material to improving conducting heat between the layer, with the compensation mode of conducting heat between the layer, promoting the heat conductivity (AFG vertically heat conductivity is extremely strong, need not promote) between the horizontal AFG material, wherein mainly include following characteristic:
the substrate is an AFG material, transparent PET release films are coated on the upper surface and the lower surface of the substrate, the thickness of each transparent PET release film is 2-3 times of that of the substrate, and the transparent PET release films are connected with the AFG material through an adhesive;
the adhesive was used as follows:
s1, after the AFG material is prepared, placing the AFG material in the middle by using a rolling device, and covering transparent PET release films on the upper surface and the lower surface of the AFG material;
s2, heating a linear area to be laminated of the transparent PET release film at a line contact position of a laminating surface in an irradiation heating mode in the laminating process;
and S3, in the laminating process, spraying an adhesive on the surfaces which are not laminated, wherein the surfaces which are not laminated comprise the inner surface of the transparent PET release film and the upper surface and the lower surface of the substrate.
In the implementation of the technical scheme of the application, the adhesive comprises a mixture containing alumina, an organic silicon heat-conducting adhesive, a polyurethane heat-conducting and electric-conducting adhesive or heat-conducting silicone grease. Generally, most of the disclosed adhesives can be used as the adhesive, as long as the adhesive has heat conductivity and does not affect heat dissipation between layers, and specifically, different adhesives can be selected according to cost control.
The irradiation heating method proposed in the present application is a non-contact heating method, but an induction heating method of the non-contact heating method cannot be used in the present application for a while because of the need for intervention of a metal material, and specifically, the irradiation heating method includes a method of using high-power infrared irradiation, a method of using a plurality of laser beam sets to perform local heating, or a method of radiation heating.
The application is suitable for bonding ultrathin materials, wherein the thickness of the transparent PET release film is less than 0.08mm in the bonding of the artificial graphite high-conductivity materials.
In order to achieve the effect of rapid local micro-melting, the temperature during local heating can be 0 to 10 ℃ higher than the melting point temperature of PET, or 20 to 30 ℃;
when the temperature is 0-10 ℃, the width of the heated linear area is selected to be 2-4mm, and the pressure during rolling is controlled to be 0.2-1Mpa;
when the temperature is 20-30 deg.C, the width of the heated linear area is 0.1-2mm, and the pressure during rolling is controlled to be 0.2-1Mpa.
Furthermore, metal ions are implanted on the surface of the AFG material.
Furthermore, the surface temperature of the compression roller is 35-55 ℃, and the surface of the compression roller is smooth.
Furthermore, a water cooling device is arranged inside the compression roller.
Has the advantages that:
the invention aims to reduce the internal clearance of the final formed product by rolling, local heating and the like, slightly melts the PET material, the slightly melted PET surface is attached to the surface of the AFG, and the rolling operation is carried out, so that the clearance of the contact surface can be reduced to the minimum degree.
Because the defects of deformation, local overheating, local exposure and the like are easily caused when the ultrathin film is directly heated, the invention innovatively adopts an irradiation heating mode which is linear rather than planar, can bear the high-speed high temperature of more than 250 ℃ and can be used for the laminating preparation process of ultrathin films with the thickness of less than 0.08mm.
Meanwhile, the PET material is selected as the material for improving the interlayer heat conduction, so that the subsequent use as a soaking plate is facilitated. Because the soaking plate need be laminated with final heat dissipation part in the use, traditional laminating mode all adopts heat conduction silica gel or other heat conduction glues to connect. And this application is owing to itself just has the PET layer, can be directly through carrying out surface melting to the PET layer to can be directly be connected convenient and fast with heat dissipation part and treat heat dissipation part.
Drawings
FIG. 1 is a real shot of an ultra-wide AFG material in the present application;
FIG. 2 is a table of specification parameters for ultra-wide AFG materials in the present application;
FIG. 3 is measured data of heat conductivity of an artificial graphite film;
FIG. 4 is a measured thermal conductivity parameter of an ultra-wide AFG material in accordance with the present application;
fig. 5 is a schematic view of the processing of an ultra-wide AFG material in the present application during lamination.
Detailed Description
For the purpose of enhancing understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are provided for illustration only and are not intended to limit the scope of the present invention.
Example (b): an ultra-wide AFG material, as shown in fig. 1, has a width of 1.2m. The thicknesses of the upper and lower transparent PET centrifugal films are both 0.075mm, the thickness of the ultra-wide AFG material is 0.03mm, and the specific other parameters are shown in figure 2.
As shown in fig. 5, the specific production flow is as follows:
s1, after the AFG material is prepared, placing the AFG material in the middle by using a rolling device, and covering transparent PET release films on the upper surface and the lower surface of the AFG material;
s2, heating an area to be laminated at a line contact position of a laminating surface in an infrared irradiation heating mode, keeping the temperature of a press roller at 50 ℃ during heating, heating one side of a PET release film to be heated by instantaneous high temperature (250 ℃), and keeping the single-side micro-melting effect of the PET release film by controlling the heating time and the size of the contact surface, wherein the other side of the PET release film is in contact with the press roller with lower temperature;
and S3, in the laminating process, the mixture containing alumina is sprayed on the surface which is not laminated to serve as an adhesive, and metal ions are also planted on the surface of the AFG material, so that certain electrostatic adsorption can be generated between the metal ions, and the adhesion effect between the adhesive and the AFG material is improved.
As shown in figures 3 and 4 of the drawings,
compared with the existing artificial graphite film, the transverse heat conduction capability of the artificial graphite film is remarkably improved, and the heat conduction rate is 12.893W/(m.k), which is increased by orders of magnitude. The heat soaking plate has stronger soaking capacity, the average temperature is about one degree higher than that of the conventional artificial graphite film, and when the heat soaking plate is used as the soaking plate, the local heat generated by the operation part can be more effectively soaked and led out, so that the operation of the heat radiating part is facilitated.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. An ultra-wide AFG material with high heat dissipation capacity comprises an AFG material and is characterized in that,
the substrate is an AFG material, transparent PET release films are coated on the upper surface and the lower surface of the substrate, the thickness of each transparent PET release film is 2-3 times of that of the substrate, and the transparent PET release films are connected with the AFG material through an adhesive;
the adhesive was used as follows:
s1, after the AFG material is prepared, the AFG material is placed in the middle of the AFG material by using a rolling device, and transparent PET release films are laminated on the upper surface and the lower surface of the AFG material;
s2, heating a linear area to be laminated of the transparent PET release film at a line contact position of a laminating surface in an irradiation heating mode in the laminating process;
and S3, in the laminating process, spraying an adhesive on the surfaces which are not laminated, wherein the surfaces which are not laminated comprise the inner surface of the transparent PET release film and the upper surface and the lower surface of the substrate.
2. A super-wide AFG material with high heat dissipation capability as recited in claim 1, wherein the adhesive comprises a mixture containing alumina, silicone heat-conducting glue, polyurethane heat-conducting and electricity-conducting glue or heat-conducting silicone grease.
3. The ultra-wide AFG material with high heat dissipation capability as claimed in claim 1, wherein the radiation heating comprises high power infrared radiation, local heating by multiple laser beam grouping lines, or radiation heating.
4. The ultra-wide AFG material with high heat dissipation capability as claimed in claim 1, wherein the thickness of the transparent PET release film is less than 0.08mm.
5. The ultra-wide AFG material with high heat dissipation capability of claim 1, wherein the temperature of the local heating is 0 to 10 ℃ higher than the melting point temperature of PET, or 20-30 ℃;
when the temperature is 0-10 ℃, the width of the heated linear area is selected to be 2-4mm, and the pressure during rolling is controlled to be 0.2-1Mpa;
when the temperature is 20-30 ℃, the width of the heated linear area is selected to be 0.1-2mm, and the pressure during rolling is controlled to be 0.2-1Mpa.
6. An ultra-wide AFG material with high heat dissipation capability as claimed in claim 1, wherein the surface of the AFG material is implanted with metal ions.
7. The ultra-wide AFG material with high heat dissipation capability of claim 1, wherein the surface temperature of the compression roller is 35-55 ℃, and the surface of the compression roller is smooth.
8. An ultra-wide AFG material with high heat dissipation capability as claimed in claim 7, wherein the inside of the compression roller is provided with a water cooling device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210936759.5A CN115284711A (en) | 2022-08-05 | 2022-08-05 | Ultra-wide AFG material with high heat dissipation capacity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210936759.5A CN115284711A (en) | 2022-08-05 | 2022-08-05 | Ultra-wide AFG material with high heat dissipation capacity |
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| CN115284711A true CN115284711A (en) | 2022-11-04 |
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| CN202210936759.5A Pending CN115284711A (en) | 2022-08-05 | 2022-08-05 | Ultra-wide AFG material with high heat dissipation capacity |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101712217A (en) * | 2009-05-12 | 2010-05-26 | 大连丽昌新材料有限公司 | Thermally-conductive graphite interface material and production process thereof |
| CN202941075U (en) * | 2012-11-01 | 2013-05-15 | 苏州斯迪克新材料科技股份有限公司 | Combined-type graphite heat radiation sheet |
| JP2016068481A (en) * | 2014-09-30 | 2016-05-09 | 大日本印刷株式会社 | Laminated film manufacturing method, circuit board manufacturing method, roll body, and release film |
| CN106079818A (en) * | 2016-06-28 | 2016-11-09 | 东莞市钛科光电科技有限公司 | A kind of local shallow-layer heating optical cement applying method and device thereof |
| CN107690385A (en) * | 2015-05-29 | 2018-02-13 | 汉高股份有限及两合公司 | Manufacture the technique and equipment of laminate |
| CN208216222U (en) * | 2018-04-17 | 2018-12-11 | 江苏九蓝新能源科技有限公司 | Heat radiation hot briquetting heat composite apparatus |
| CN111218230A (en) * | 2018-11-27 | 2020-06-02 | 胡雄焱 | Graphite heat conduction and dissipation adhesive tape |
| CN111483189A (en) * | 2020-04-20 | 2020-08-04 | 谭清 | Manufacturing process of heat dissipation graphite copper foil |
| CN114793412A (en) * | 2022-04-28 | 2022-07-26 | 安徽碳华新材料科技有限公司 | Integrated alkene-carbon composite heat dissipation structure for vehicle heat dissipation system |
-
2022
- 2022-08-05 CN CN202210936759.5A patent/CN115284711A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101712217A (en) * | 2009-05-12 | 2010-05-26 | 大连丽昌新材料有限公司 | Thermally-conductive graphite interface material and production process thereof |
| CN202941075U (en) * | 2012-11-01 | 2013-05-15 | 苏州斯迪克新材料科技股份有限公司 | Combined-type graphite heat radiation sheet |
| JP2016068481A (en) * | 2014-09-30 | 2016-05-09 | 大日本印刷株式会社 | Laminated film manufacturing method, circuit board manufacturing method, roll body, and release film |
| CN107690385A (en) * | 2015-05-29 | 2018-02-13 | 汉高股份有限及两合公司 | Manufacture the technique and equipment of laminate |
| CN106079818A (en) * | 2016-06-28 | 2016-11-09 | 东莞市钛科光电科技有限公司 | A kind of local shallow-layer heating optical cement applying method and device thereof |
| CN208216222U (en) * | 2018-04-17 | 2018-12-11 | 江苏九蓝新能源科技有限公司 | Heat radiation hot briquetting heat composite apparatus |
| CN111218230A (en) * | 2018-11-27 | 2020-06-02 | 胡雄焱 | Graphite heat conduction and dissipation adhesive tape |
| CN111483189A (en) * | 2020-04-20 | 2020-08-04 | 谭清 | Manufacturing process of heat dissipation graphite copper foil |
| CN114793412A (en) * | 2022-04-28 | 2022-07-26 | 安徽碳华新材料科技有限公司 | Integrated alkene-carbon composite heat dissipation structure for vehicle heat dissipation system |
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