CN103059761B - High-heat conductivity coefficient graphite heat-radiation adhesive tape - Google Patents
High-heat conductivity coefficient graphite heat-radiation adhesive tape Download PDFInfo
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Abstract
The invention discloses a high-heat conductivity coefficient graphite heat-radiation adhesive tape. The high-heat conductivity coefficient graphite heat-radiation adhesive tape comprises a graphite layer. A metal layer is coated on an upper surface of the graphite layer. A heat-radiation adhesive layer is coated on a lower surface of the graphite layer. The graphite layer is prepared by adding ethylene glycol or triethylamine into a polyamide acid solution, heating to a temperature of 300 DEG C to obtain a polyimide film, heating the polyimide film to a temperature of 250 DEG C, heating to a temperature of 1200 DEG C to obtain a pre-sintered carbonized film, rolling the pre-sintered carbonized film by a roller mill, heating to a temperature of 2400 DEG C, heating to a temperature of 2900 DEG C to obtain a mainly sintered graphite film, and rolling the mainly sintered graphite film. The high-heat conductivity coefficient graphite heat-radiation adhesive tape has high heat conduction performances in vertical and horizontal directions, avoids adhesive tape local overheating and realizes uniformity of adhesive tape heat conduction performances.
Description
Technical field
The graphite radiating adhesive tape that the present invention relates to a kind of high thermal conductivity coefficient, belongs to sealing tape technical field.
Background technology
Along with modern microelectronics high speed development, electronics (as notebook computer, mobile phone, panel computer etc.) becomes ultra-thin, light day by day, this structure obviously improves electronic equipment internal power density, and in service produced heat is difficult for discharging, be easy to run-up and form high temperature.On the other hand, high temperature can reduce performance, reliability and the work-ing life of electronics.Therefore, current electron trade proposes more and more higher requirement for the heat sink material as heat control system core component, rapidly heat is passed in the urgent need to a kind of high-efficiency heat conduction, light material, ensures that electronics normally moves.
Conventional graphite radiator element technique is by powdered graphite, as crystalline flake graphite, is dispersed in tackiness agent, makes graphite heat radiation fin by hot pressing, as Chinese Patent Application No. 201110098100.9,201010240207.8.Graphite heat radiation fin prepared by this method is sold on market, and its thermal conductivity is generally lower.
In order to improve heat conductivility, there is report, as Chinese Patent Application No. 201110002281.0, after being processed, natural graphite obtains expansible black lead, after thermal treatment, obtain vermiform, after calendering, can obtain radiator element.Separately have report, as Chinese Patent Application No. 200910074263.6, taking natural flake graphite and coal-tar pitch as raw material, first kneading, then compression moulding, then prepare conductive graphite heat sink material in greying.
Although these methods can partly improve the thermal conductivity of graphite material, act on limitedly, its thermal conductivity is generally lower than 600, and graphite single facet can reach 2200 to thermal conductivity, the heat conductivility of graphite heat radiation fin has the very large rising space in theory as can be seen here.In addition, because graphite easily forms layered crystal structure, and there is not orderly structure in interlayer, thus there is significant anisotropy, axial thermal conductivity coefficient often only towards 1/tens, this characteristic limitations the range of application of graphite heat radiation fin.
Summary of the invention
The object of the invention is to provide a kind of graphite radiating adhesive tape of high thermal conductivity coefficient, this graphite radiating adhesive tape has all improved heat conductivility with horizontal direction in the vertical direction, avoid adhesive tape local superheating, realize the homogeneity of adhesive tape heat conductivility, both adhesive tape local superheating is also avoided in the diffusion that had been conducive to heat, improve performance and the life-span of product, and product versatility and convenience.
For achieving the above object, the technical solution used in the present invention is: a kind of graphite radiating adhesive tape of high thermal conductivity coefficient, comprise a graphite linings, and this graphite linings upper surface is covered with a metal level, described graphite linings lower surface is coated with heat-conducting glue adhesion coating, and a release film is covered on another surface of heat-conducting glue adhesion coating; Described graphite linings obtains by following processing method, and this processing method comprises the following steps:
Step 1, will in polyamic acid solution, add ethylene glycol or triethylamine, after fully stirring, be coated on a glass baseplate layer or organic substrate layer;
Described step 2, under nitrogen protection, 80 DEG C of constant temperature 1 hour;
Step 3, be positioned in the baking oven of vacuum environment, 100 DEG C of constant temperature 0.9 ~ 1.1 hour, is then warmed up to 300 DEG C, and constant temperature is naturally cooling after 0.9 ~ 1.1 hour, thereby obtains Kapton;
Step 4, by Kapton under protection of inert gas, rise to 250 DEG C with 4 ~ 6 degree/min speed from room temperature, keep 0.9 ~ 1.1 hour, then with 2.5 ~ 3.5 degree/min, rise to 500 DEG C, keep 1 hour; Then rise to 800 DEG C with the speed of 4 ~ 6 degree/min, keep 0.9 ~ 1.1 hour; Rise to 1200 DEG C with the speed of 9 ~ 11 degree/min again, preserve cooling after 0.9 ~ 1.1 hour, thereby obtain the carbonized film of pre-burned;
Step 5, employing rolling press roll the carbonized film of the pre-burned of described step 4;
Step 6, rise to 2400 DEG C with the speed of 19 ~ 21 degree/min, keep 0.9 ~ 1.1 hour, then rise to 2900 DEG C with the speed of 19 ~ 21 degree/min, keep cooling after 1.8 ~ 2.2 hours, thereby obtain the main graphite film of firing;
Thereby step 7, the graphite film that then master of step 6 gained fires roll and obtain described graphite linings.
In technique scheme, further improved plan is as follows:
1. in such scheme, described metal level by aluminium lamination and copper layer by layer stacked group become, described copper layer is between aluminium lamination and graphite linings.
2. in such scheme, described step 3, be positioned in the baking oven of vacuum environment, 100 DEG C of constant temperature 1 hour, is then warmed up to 300 DEG C, and constant temperature is naturally cooling after 1 hour, thereby obtains Kapton.
3. in such scheme, described step 4, by Kapton under argon shield, rise to 250 DEG C with 5 degree/min speed from room temperature, keep 1 hour, then with 3 degree/min, rise to 500 DEG C, keep 1 hour, then rise to 800 DEG C with the speed of 5 degree/min, keep 1 hour, rise to 1200 DEG C with the speed of 10 degree/min again, preserve cooling after 1 hour, thereby obtain the carbonized film of pre-burned;
Described step 6, rise to 2400 DEG C with the speed of 20 degree/min, keep 1 hour, then rise to 2900 DEG C with the speed of 20 degree/min, keep cooling after 2 hours, thereby obtain the main graphite film of firing.
Because technique scheme is used, the present invention compared with prior art has following advantages and effect:
1. the graphite radiating adhesive tape of high thermal conductivity coefficient of the present invention, it has all improved heat conductivility with horizontal direction in the vertical direction, avoid adhesive tape local superheating, realize the homogeneity of adhesive tape heat conductivility, both adhesive tape local superheating is also avoided in the diffusion that had been conducive to heat, improve performance and the life-span of product, and product versatility and convenience.
2. the graphite radiating adhesive tape of high thermal conductivity coefficient of the present invention, its graphite linings upper and lower surface is all fitted with light strippable PET film and heavy strippable PET film, in the time that moulding, film are cut, can play a supporting role to graphite, be conducive to graphite cutting, greatly reduce the probability that graphite breaks; Secondly, light strippable PET film and heavy strippable PET film are positioned at the upper and lower surface of graphite linings by heat-conducting glue adhesion coating respectively, when use, first weight strippable PET film is peeled off, be covered on and treat thermal component surface, then, light strippable PET film is peeled off, thereby effectively avoided cull, realize and treated that thermal component gapless is bonding, being conducive to heat radiation evenly.
3. the graphite radiating adhesive tape of high thermal conductivity coefficient of the present invention, its graphite linings surface is covered with a complex metal layer, adopt anisotropic wire coefficient metal level and the combination of isotropy metal level, both improved the thermal conductivity along length, also improved thickness direction thermal conductivity, realize the homogeneity of adhesive tape heat conductivility, exempted from adhesive tape local superheating, improved performance and the life-span of product; Secondly, adopt by aluminium lamination and copper layer by layer stacked group become complex metal layer, be conducive to form the thermograde of ladder, thereby maintain heat conducting impellent, be conducive to that heat is stable to be transmitted fast.
4. the graphite radiating adhesive tape of high thermal conductivity coefficient of the present invention, it forms two-way stretch, high-modulus graphite linings based on specific components of the present invention and technique, can reduce the volumetric shrinkage of Kapton in sintering process.
Brief description of the drawings
Accompanying drawing 1 is graphite radiating adhesive tape structure signal intention one of the present invention;
Accompanying drawing 2 is graphite radiating adhesive tape structure signal intention two of the present invention;
The thermal weight loss schematic diagram that accompanying drawing 3 is Kapton of the present invention;
The thermal change schematic diagram that accompanying drawing 4 is Kapton of the present invention;
Accompanying drawing 5 is graphite flake XRD diffracting spectrum of the present invention.
In above accompanying drawing: 1, graphite linings; 2, heat-conducting glue adhesion coating; 3, release film; 31, silicon layer; 32, PET film; 4, metal level; 41, aluminium lamination; 42, copper layer.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1: a kind of graphite radiating adhesive tape of high thermal conductivity coefficient, comprise a graphite linings 1, this graphite linings 1 upper surface is covered with a metal level 4, and described graphite linings 1 lower surface is coated with heat-conducting glue adhesion coating 2, one release films 3 and is covered on heat-conducting glue adhesion coating 2 another surfaces; Described graphite linings 1 obtains by following processing method, and this processing method comprises the following steps:
Step 1, will in polyamic acid solution, add triethylamine, after fully stirring, be coated on organic substrate layer;
Step 2, under nitrogen protection, 80 DEG C of constant temperature 0.95 hour;
Step 3, be positioned in the baking oven of vacuum environment, 100 DEG C of constant temperature 1.05 hours, is then warmed up to 300 DEG C, and constant temperature is naturally cooling after 0.9 hour, thereby obtains Kapton;
Step 4, by Kapton under protection of inert gas, rise to 250 DEG C with 4.5 degree/min speed from room temperature, keep 0.92 hour, then with 2.5 degree/min, rise to 500 DEG C, keep 1 hour; Then rise to 800 DEG C with the speed of 5 degree/min, keep 1 hour; Rise to 1200 DEG C with the speed of 9.5 degree/min again, preserve cooling after 1.05 hours, thereby obtain the carbonized film of pre-burned;
Step 5, employing rolling press roll the carbonized film of the pre-burned of described step 4;
Step 6, rise to 2400 DEG C with the speed of 19.5 degree/min, keep 1.05 hours, then rise to 2900 DEG C with the speed of 21 degree/min, keep cooling after 2.1 hours, thereby obtain the main graphite film of firing;
Thereby step 7, the graphite film that then master of step 6 gained fires roll and obtain described graphite linings 1.
From figure accompanying drawing 5, can see the diffraction peak of graphite-structure, prove the formation of graphite-structure.
Embodiment 2: a kind of graphite radiating adhesive tape of high thermal conductivity coefficient, comprise a graphite linings 1, this graphite linings 1 upper surface is covered with a metal level 4, and described graphite linings 1 lower surface is coated with heat-conducting glue adhesion coating 2, one release films 3 and is covered on heat-conducting glue adhesion coating 2 another surfaces; Described metal level 4 is by aluminium lamination 41 and copper layer 42 is stacked forms, and described copper layer 42 is between aluminium lamination 41 and graphite linings 1;
Described graphite linings 1 obtains by following processing method, and this processing method comprises the following steps:
Step 1, will in polyamic acid solution, add ethylene glycol, after fully stirring, be coated on glass baseplate layer;
Step 2, under nitrogen protection, 80 DEG C of constant temperature 1 hour;
Step 3, be positioned in the baking oven of vacuum environment, 100 DEG C of constant temperature 1 hour, is then warmed up to 300 DEG C, and constant temperature is naturally cooling after 1 hour, thereby obtains Kapton;
Step 4, by Kapton under protection of inert gas, rise to 250 DEG C with 5 degree/min speed from room temperature, keep 1 hour, then with 3 degree/min, rise to 500 DEG C, keep 1 hour; Then rise to 800 DEG C with the speed of 5 degree/min, keep 1 hour; Rise to 1200 DEG C with the speed of 10 degree/min again, preserve cooling after 1 hour, thereby obtain the carbonized film of pre-burned;
Step 5, employing rolling press roll the carbonized film of the pre-burned of described step 4;
Step 6, rise to 2400 DEG C with the speed of 20 degree/min, keep 1 hour, then rise to 2900 DEG C with the speed of 20 degree/min, keep cooling after 2 hours, thereby obtain the main graphite film of firing;
Thereby step 7, the graphite film that then master of step 6 gained fires roll and obtain described graphite linings 1.
Above-described embodiment is only explanation technical conceive of the present invention and feature, and its object is to allow person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences that spirit is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (2)
1. the graphite radiating adhesive tape of a high thermal conductivity coefficient, it is characterized in that: comprise a graphite linings (1), this graphite linings (1) upper surface is covered with a metal level (4), described graphite linings (1) lower surface is coated with heat-conducting glue adhesion coating (2), and a release film (3) is covered on another surface of heat-conducting glue adhesion coating (2); Described graphite linings (1) obtains by following processing method, and this processing method comprises the following steps:
Step 1, will in polyamic acid solution, add ethylene glycol or triethylamine, after fully stirring, be coated on a glass baseplate layer or organic substrate layer;
Step 2, under nitrogen protection, 80 DEG C of constant temperature 1 hour;
Step 3, be positioned in the baking oven of vacuum environment, 100 DEG C of constant temperature 0.9 ~ 1.1 hour, is then warmed up to 300 DEG C, and constant temperature is naturally cooling after 0.9 ~ 1.1 hour, thereby obtains Kapton;
Step 4, by Kapton under protection of inert gas, rise to 250 DEG C with 4 ~ 6 degree/min speed from room temperature, keep 0.9 ~ 1.1 hour, then with 2.5 ~ 3.5 degree/min, rise to 500 DEG C, keep 1 hour; Then rise to 800 DEG C with the speed of 4 ~ 6 degree/min, keep 0.9 ~ 1.1 hour; Rise to 1200 DEG C with the speed of 9 ~ 11 degree/min again, preserve cooling after 0.9 ~ 1.1 hour, thereby obtain the carbonized film of pre-burned;
Step 5, employing rolling press roll the carbonized film of the pre-burned of described step 4;
Step 6, rise to 2400 DEG C with the speed of 19 ~ 21 degree/min, keep 0.9 ~ 1.1 hour, then rise to 2900 DEG C with the speed of 19 ~ 21 degree/min, keep cooling after 1.8 ~ 2.2 hours, thereby obtain the main graphite film of firing;
Thereby step 7, the graphite film that then master of step 6 gained fires roll and obtain described graphite linings (1).
2. the graphite radiating adhesive tape of high thermal conductivity coefficient according to claim 1, is characterized in that: described metal level (4) is by aluminium lamination (41) and copper layer (42) stacked composition, and described copper layer (42) is positioned between aluminium lamination (41) and graphite linings (1).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410441713.1A CN104263267B (en) | 2012-12-28 | 2012-12-28 | Multi-usage conductive and heat-conductive compound adhesive tape |
| CN201210584542.9A CN103059761B (en) | 2012-12-28 | 2012-12-28 | High-heat conductivity coefficient graphite heat-radiation adhesive tape |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210584542.9A CN103059761B (en) | 2012-12-28 | 2012-12-28 | High-heat conductivity coefficient graphite heat-radiation adhesive tape |
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| CN201410441713.1A Division CN104263267B (en) | 2012-12-28 | 2012-12-28 | Multi-usage conductive and heat-conductive compound adhesive tape |
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| CN103059761A CN103059761A (en) | 2013-04-24 |
| CN103059761B true CN103059761B (en) | 2014-09-03 |
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| CN201410441713.1A Active CN104263267B (en) | 2012-12-28 | 2012-12-28 | Multi-usage conductive and heat-conductive compound adhesive tape |
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| CN106318251A (en) * | 2014-01-26 | 2017-01-11 | 斯迪克新型材料（江苏）有限公司 | Manufacture method of thermal transfer film |
| CN105038626B (en) * | 2014-01-26 | 2018-05-11 | 江苏斯迪克新材料科技股份有限公司 | Compound two-sided tape |
| CN106118516B (en) * | 2014-01-26 | 2019-03-26 | 江苏斯迪克新材料科技股份有限公司 | Manufacturing process for high compactness heat dissipation pad pasting |
| CN104944416B (en) * | 2014-01-26 | 2017-10-27 | 斯迪克新型材料（江苏）有限公司 | Preparation method for high compactness graphite flake |
| CN103805082B (en) * | 2014-01-26 | 2015-07-22 | 斯迪克新型材料（江苏）有限公司 | High-heat-conductivity-coefficient radiating patch |
| CN106987214A (en) * | 2014-01-26 | 2017-07-28 | 江苏斯迪克新材料科技股份有限公司 | Radiating stone paster for electronic equipment |
| CN105969223B (en) * | 2014-01-26 | 2019-01-01 | 江苏斯迪克新材料科技股份有限公司 | Manufacturing process for equal thermal bonding tape |
| CN107043257A (en) * | 2014-01-26 | 2017-08-15 | 斯迪克新型材料（江苏）有限公司 | Manufacture method for the fin of computer radiator |
| CN103787323B (en) * | 2014-01-26 | 2015-07-22 | 苏州斯迪克新材料科技股份有限公司 | Heat conduction graphite flake and manufacturing process thereof |
| JP6379176B2 (en) * | 2014-02-25 | 2018-08-22 | 株式会社カネカ | Highly oriented graphite |
| CN104176733B (en) * | 2014-08-25 | 2017-02-08 | 上海弘枫实业有限公司 | Manufacturing method of high-thermal-conductivity graphite film |
| CN104400917A (en) * | 2014-11-04 | 2015-03-11 | 广州橸赛精密机械有限公司 | Graphite sheet cutting process and graphite sheet adapting to process |
| WO2016133233A1 (en) * | 2015-02-16 | 2016-08-25 | 조종수 | Ultrathin thermal diffusion sheet and manufacturing method thereof |
| CN106231865A (en) * | 2016-07-29 | 2016-12-14 | 芜湖迈特电子科技有限公司 | A kind of Novel heat-conducting graphite flake and manufacture method thereof |
| CN106847767A (en) * | 2017-02-22 | 2017-06-13 | 东莞市鸿亿导热材料有限公司 | A kind of graphite Copper Foil heat sink compound |
| CN107033804A (en) * | 2017-06-05 | 2017-08-11 | 苏州金禾新材料股份有限公司 | High heat conduction graphite glue band |
| CN109233674A (en) * | 2017-06-16 | 2019-01-18 | 徐涌涛 | A kind of conductive tape |
| CN107672279A (en) * | 2017-10-17 | 2018-02-09 | 沈晨 | A kind of preparation method of high heat conduction graphite composite material |
| CN108531093A (en) * | 2017-12-28 | 2018-09-14 | 张家港康得新光电材料有限公司 | Heat-conducting glue band and preparation method thereof |
| CN109777316A (en) * | 2019-01-28 | 2019-05-21 | 东莞市澳中电子材料有限公司 | A kind of high thermal conductivity graphite glue band and preparation method thereof |
| CN109554130A (en) * | 2019-01-31 | 2019-04-02 | 常德力元新材料有限责任公司 | A kind of graphite glue band and preparation method thereof |
| CN109764321B (en) * | 2019-03-08 | 2020-06-26 | 南京理工大学 | Cooling structure of LED illuminating lamp and preparation method thereof |
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| CN101225284A (en) * | 2007-01-17 | 2008-07-23 | 卓英社有限公司 | Conductive pressure sensitive adhesive tape |
| CN102757736A (en) * | 2011-04-29 | 2012-10-31 | 苏州沛德导热材料有限公司 | Graphite heat conducting adhesive tape and production process thereof |
Also Published As
| Publication number | Publication date |
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| CN103059761A (en) | 2013-04-24 |
| CN104263267A (en) | 2015-01-07 |
| CN104263267B (en) | 2016-04-27 |
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