CN103045119B - Heat-dissipating double-sided adhesive tape with ultrahigh heat conductivity coefficient - Google Patents
Heat-dissipating double-sided adhesive tape with ultrahigh heat conductivity coefficient Download PDFInfo
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Abstract
The invention discloses a heat-dissipating double-sided adhesive tape with an ultrahigh heat conductivity coefficient. Ethylene glycol or triethylamine is added into a polyamic acid solution, the resulting mixture is put in an oven in a vacuum environment and maintained at 100 DEG C for 0.9-1.1 hours, the temperature is raised to 300 DEG C and maintained for 0.9-1.1 hours, followed by natural cooling, to produce a polyimide film; the polyimide film is heated up to 250 DEG C from room temperature and then heated up to 500 DEG C, and further heated up to 1200 DEG C at a rate of 9-11 DEG C/min, to produce a prefired carbonized film; the prefired carbonized film obtained in the step 4 is rolled by a calendar; the rolled product is heated up to 2400 DEG C at a rate of 19-21 DEG C/min and maintained for 0.9-1.1 hours and then heated up to 2900 DEG C at a rate of 19-21 DEG C/min and maintained for 1.8-2.2 hours, followed by cooling, to produce a fired graphite film; and subsequently the graphite film is rolled to obtain a graphite coating. The heat transfer performance of the double-sided adhesive tape in both the vertical and the horizontal directions are improved, so as to prevent local overheat of the adhesive tape and ensure uniformity of heat transfer performance of the adhesive tape.
Description
Technical field
The present invention relates to a kind of super-high heat-conductive coefficient heat radiation double sticky tape, belong to double sticky 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, in the urgent need to a kind of high-efficiency heat conduction, light material, rapidly heat is passed, and ensures that electronics normally moves.
Conventional graphite radiator element technique is by powdered graphite, as crystalline flake graphite, is dispersed in tackiness agent, by hot pressing, makes graphite heat radiation fin, 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, take 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, but act on limited, its thermal conductivity is generally lower than 600w/m ﹒ k, and graphite single facet can reach 2200 w/m ﹒ k to thermal conductivity, and 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 super-high heat-conductive coefficient heat radiation double sticky tape, this heat radiation double sticky tape has all improved heat conductivility with horizontal direction in the vertical direction, avoid adhesive tape local superheating, realized the homogeneity of adhesive tape heat conductivility, both adhesive tape local superheating is also avoided in the diffusion that had been conducive to heat, improved 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 super-high heat-conductive coefficient heat radiation double sticky tape, described heat radiation double sticky tape fits between radiating surface and heat generating components, described heat radiation double sticky tape comprises light strippable PET film and heavy strippable PET film, is disposed with the first heat-conducting glue adhesion coating, graphite linings and the second heat-conducting glue adhesion coating between this light strippable PET film and heavy strippable PET film; 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;
Step 2, under nitrogen protection, 80 ℃ of constant temperature 0.9 ~ 1.1 hour;
Step 4, by Kapton under protection of inert gas, with 4 ~ 6 degree/min speed, from room temperature, rise to 250 ℃, keep 0.9 ~ 1.1 hour, then with 2.5 ~ 3.5 degree/min, rise to 500 ℃, keep 1 hour; Then the speed with 4 ~ 6 degree/min rises to 800 ℃, keeps 0.9 ~ 1.1 hour; Speed with 9 ~ 11 degree/min rises to 1200 ℃ again, preserve cooling after 0.9 ~ 1.1 hour, thereby obtain the carbonized film of pre-burned;
Step 6, with the speed of 19 ~ 21 degree/min, rise to 2400 ℃, keep 0.9 ~ 1.1 hour, then rise to 2900 ℃ 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 step 2, under nitrogen protection, 80 ℃ of constant temperature 1 hour;
Described step 3, be positioned in the baking oven of vacuum environment, 100 ℃ of constant temperature 1 hour, is then warmed up to 300 ℃, and constant temperature is naturally cooling after 1 hour, thereby obtains Kapton.
2, in such scheme, described step 4, by Kapton under argon shield, with 5 degree/min speed, from room temperature, rise to 250 ℃, keep 1 hour, then with 3 degree/min, rise to 500 ℃, keep 1 hour, then the speed with 5 degree/min rises to 800 ℃, keep 1 hour, speed with 10 degree/min rises to 1200 ℃ again, preserve cooling after 1 hour, thereby obtain the carbonized film of pre-burned;
Described step 6, with the speed of 20 degree/min, rise to 2400 ℃, keep 1 hour, then rise to 2900 ℃ with the speed of 20 degree/min, keep cooling after 2 hours, thereby obtain the main graphite film of firing.
3, in such scheme, described light strippable PET film and heavy strippable PET film are the PET film that scribbles silicon layer, and the silicon layer of this PET film and described the first heat-conducting glue adhesion coating, the second heat-conducting glue adhesion coating are bonding.
4, in such scheme, the PET film thickness of described light strippable PET film is 2 ~ 12 μ m, and the PET film thickness of described heavy strippable PET film is 12 ~ 75 μ m.
5, in such scheme, described graphite
layerthickness be 10 ~ 100 μ m.
6,, in such scheme, the grammes per square metre of described light strippable PET film peeling force is 5 ~ 10g/m
2, the grammes per square metre of described heavy strippable PET film peeling force is 50 ~ 100g/m
2.
Because technique scheme is used, the present invention compared with prior art has following advantages and effect:
1. super-high heat-conductive coefficient of the present invention heat radiation double sticky tape, it has all improved heat conductivility with horizontal direction in the vertical direction, avoid adhesive tape local superheating, realized the homogeneity of adhesive tape heat conductivility, both adhesive tape local superheating is also avoided in the diffusion that had been conducive to heat, improved performance and the life-span of product, and product versatility and convenience.
2. super-high heat-conductive coefficient of the present invention heat radiation double sticky tape, its graphite
layerupper and lower surface is all fitted with light strippable PET film and heavy strippable PET film, when moulding, film are cut, can play a supporting role to graphite, is conducive to graphite cutting, greatly reduces 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, during 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, realized and treated that thermal component gapless is bonding, being conducive to heat radiation evenly.
3. super-high heat-conductive coefficient of the present invention heat radiation double sticky tape, it forms the graphite linings of two-way stretch, high-modulus based on specific components of the present invention and technique, can reduce the volumetric shrinkage of Kapton in sintering process.
Accompanying drawing explanation
Accompanying drawing 1 is super-high heat-conductive coefficient heat radiation double-faced adhesive tape structure schematic diagram of the present invention;
Accompanying drawing 2 is the thermal weight loss schematic diagram of Kapton of the present invention;
Accompanying drawing 3 is the thermal change schematic diagram of Kapton of the present invention;
Accompanying drawing 4 is graphite flake XRD diffracting spectrum of the present invention.
In above accompanying drawing: 1, light strippable PET film; 2, heavy strippable PET film; 3, the first heat-conducting glue adhesion coating; 4, graphite linings; 5, the second heat-conducting glue adhesion coating; 6, silicon layer; 7, PET film.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1: a kind of super-high heat-conductive coefficient heat radiation double sticky tape, described heat radiation double sticky tape fits between radiating surface and heat generating components, described heat radiation double sticky tape comprises light strippable PET film 1 and heavy strippable PET film 2, is disposed with the first heat-conducting glue adhesion coating 3, graphite linings 4 and the second heat-conducting glue adhesion coating 5 between this light strippable PET film 1 and heavy strippable PET film 2; Described graphite linings 4 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 ℃ of constant temperature 0.95 hour;
Step 4, by Kapton under protection of inert gas, with 4.5 degree/min speed, from room temperature, rise to 250 ℃, keep 0.92 hour, then with 2.5 degree/min, rise to 500 ℃, keep 1 hour; Then the speed with 5 degree/min rises to 800 ℃, keeps 1 hour; Speed with 9.5 degree/min rises to 1200 ℃ again, preserve cooling after 1.05 hours, thereby obtain the carbonized film of pre-burned;
Step 6, with the speed of 19.5 degree/min, rise to 2400 ℃, keep 1.05 hours, then rise to 2900 ℃ 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 4.
Above-mentioned light strippable PET film 1 and heavy strippable PET film 2 are the PET film 7 that scribbles silicon layer 6, and the silicon layer of this PET film 76 and described the first heat-conducting glue adhesion coating 3, the second heat-conducting glue adhesion coating 5 are bonding.
PET film 7 thickness of above-mentioned light strippable PET film 1 are 4 μ m, and PET film 7 thickness of described heavy strippable PET film 2 are 32 μ m.
The thickness of above-mentioned graphite linings 4 is 20 μ m.
The grammes per square metre of above-mentioned light strippable PET film 1 peeling force is 6g/m
2, the grammes per square metre of described heavy strippable PET film 2 peeling forces is 80g/m
2.
From figure accompanying drawing 4, can see the diffraction peak of graphite-structure, prove the formation of graphite-structure.
The vertical thermal conductivity of embodiment 1 is 200 w/m. k, and horizontal thermal conductivity is 1600 w/m. k, the > of resistance to crooked experiment 10000(R5/180 °).
Embodiment 2: a kind of super-high heat-conductive coefficient heat radiation double sticky tape, described heat radiation double sticky tape fits between radiating surface and heat generating components, described heat radiation double sticky tape comprises light strippable PET film 1 and heavy strippable PET film 2, is disposed with the first heat-conducting glue adhesion coating 3, graphite linings 4 and the second heat-conducting glue adhesion coating 5 between this light strippable PET film 1 and heavy strippable PET film 2; Described graphite linings 4 obtains by following processing method, and this processing method comprises the following steps:
Step 1, will in polyamic acid solution, add the auxiliary agents such as tackify, after fully stirring, be coated on a substrate layer;
Step 2, under nitrogen protection, 80 ℃ of constant temperature 1 hour;
Step 4, by Kapton under protection of inert gas, with 5 degree/min speed, from room temperature, rise to 250 ℃, keep 1 hour, then with 3 degree/min, rise to 500 ℃, keep 1 hour; Then the speed with 5 degree/min rises to 800 ℃, keeps 1 hour; Speed with 10 degree/min rises to 1200 ℃ again, preserve cooling after 1 hour, thereby obtain the carbonized film of pre-burned;
Step 6, with the speed of 20 degree/min, rise to 2400 ℃, keep 1 hour, then rise to 2900 ℃ 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 4.
Above-mentioned light strippable PET film 1 and heavy strippable PET film 2 are the PET film 7 that scribbles silicon layer 6, and the silicon layer of this PET film 76 and described the first heat-conducting glue adhesion coating 3, the second heat-conducting glue adhesion coating 5 are bonding.
PET film 7 thickness of above-mentioned light strippable PET film 1 are 9 μ m, and PET film 7 thickness of described heavy strippable PET film 2 are 55 μ m.
The thickness of above-mentioned graphite linings 4 is 70 μ m.
The grammes per square metre of above-mentioned light strippable PET film 1 peeling force is 9g/m
2, the grammes per square metre of described heavy strippable PET film 2 peeling forces is 65g/m
2.
The vertical thermal conductivity of embodiment 2 is 260w/m. k, and horizontal thermal conductivity is 1600w/m.k, the > of resistance to crooked experiment 10000(R5/180 °).
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 (7)
1. super-high heat-conductive coefficient heat radiation double sticky tape, described heat radiation double sticky tape fits between radiating surface and heat generating components, it is characterized in that: described heat radiation double sticky tape comprises light strippable PET film (1) and heavy strippable PET film (2), between this light strippable PET film (1) and heavy strippable PET film (2), is disposed with the first heat-conducting glue adhesion coating (3), graphite linings (4) and the second heat-conducting glue adhesion coating (5); Described graphite linings (4) 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 ℃ of constant temperature 0.9 ~ 1.1 hour;
Step 3, be positioned in the baking oven of vacuum environment, 100 ℃ of constant temperature 0.9 ~ 1.1 hour, is then warmed up to 300 ℃, and constant temperature is naturally cooling after 0.9 ~ 1.1 hour, thereby obtains Kapton;
Step 4, by Kapton under protection of inert gas, with 4 ~ 6 degree/min speed, from room temperature, rise to 250 ℃, keep 0.9 ~ 1.1 hour, then with 2.5 ~ 3.5 degree/min, rise to 500 ℃, keep 1 hour; Then the speed with 4 ~ 6 degree/min rises to 800 ℃, keeps 0.9 ~ 1.1 hour; Speed with 9 ~ 11 degree/min rises to 1200 ℃ 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, with the speed of 19 ~ 21 degree/min, rise to 2400 ℃, keep 0.9 ~ 1.1 hour, then rise to 2900 ℃ 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 (4).
2. super-high heat-conductive coefficient according to claim 1 heat radiation double sticky tape, is characterized in that:
Described step 2, under nitrogen protection, 80 ℃ of constant temperature 1 hour;
Described step 3, be positioned in the baking oven of vacuum environment, 100 ℃ of constant temperature 1 hour, is then warmed up to 300 ℃, and constant temperature is naturally cooling after 1 hour, thereby obtains Kapton.
3. super-high heat-conductive coefficient according to claim 1 heat radiation double sticky tape, is characterized in that:
Described step 4, by Kapton under argon shield, with 5 degree/min speed, from room temperature, rise to 250 ℃, keep 1 hour, then with 3 degree/min, rise to 500 ℃, keep 1 hour, then the speed with 5 degree/min rises to 800 ℃, keeps 1 hour, then rises to 1200 ℃ with the speed of 10 degree/min, preserve cooling after 1 hour, thereby obtain the carbonized film of pre-burned;
Described step 6, with the speed of 20 degree/min, rise to 2400 ℃, keep 1 hour, then rise to 2900 ℃ with the speed of 20 degree/min, keep cooling after 2 hours, thereby obtain the main graphite film of firing.
4. super-high heat-conductive coefficient according to claim 1 heat radiation double sticky tape, it is characterized in that: described light strippable PET film (1) and heavy strippable PET film (2) are the PET film (7) that scribbles silicon layer (6), the silicon layer (6) of this PET film (7) and described the first heat-conducting glue adhesion coating (3), the second heat-conducting glue adhesion coating (5) are bonding.
5. super-high heat-conductive coefficient heat radiation double sticky tape according to claim 4, is characterized in that: PET film (7) thickness of described light strippable PET film (1) is 2 ~ 12 μ m, and PET film (7) thickness of described heavy strippable PET film (2) is 12 ~ 75 μ m.
6. super-high heat-conductive coefficient heat radiation double sticky tape according to claim 1, is characterized in that: described graphite
layer(4) thickness is 10 ~ 100 μ m.
7. super-high heat-conductive coefficient heat radiation double sticky tape according to claim 1, is characterized in that: the grammes per square metre of described light strippable PET film (1) peeling force is 5 ~ 10g/m
2, the grammes per square metre of described heavy strippable PET film (2) peeling force is 50 ~ 100g/m
2.
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| CN201210581723.6A CN103045119B (en) | 2012-12-28 | 2012-12-28 | Heat-dissipating double-sided adhesive tape with ultrahigh heat conductivity coefficient |
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| CN103864067B (en) * | 2014-03-26 | 2017-01-11 | 苏州格优碳素新材料有限公司 | Preparation method of high thermal conductivity graphite membrane-copper composite material |
| CN103864068B (en) * | 2014-03-26 | 2016-02-17 | 苏州格优碳素新材料有限公司 | A kind of preparation method of high conduction graphite film |
| 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 |
| CN104943268A (en) * | 2015-05-29 | 2015-09-30 | 苏州斯迪克新材料科技股份有限公司 | High-tensile strength composite film |
| CN107406731A (en) * | 2016-01-06 | 2017-11-28 | 日东电工株式会社 | Graphite adhesive tape with release liner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2008149920A1 (en) * | 2007-06-07 | 2008-12-11 | Kaneka Corporation | Graphite composite film |
| JP5607337B2 (en) * | 2009-10-27 | 2014-10-15 | リンテック株式会社 | Water-dispersed acrylic pressure-sensitive adhesive composition, pressure-sensitive adhesive sheet and method for producing the same |
| CN102811947B (en) * | 2010-02-22 | 2016-05-18 | 株式会社钟化 | The manufacture method of the manufacture method of graphite film and rewinding method, graphite composite film and graphite stamping-out processed goods |
| CN202322703U (en) * | 2011-11-07 | 2012-07-11 | 吴志高 | Adhesive tape with heat conduction performance |
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Address after: 223900 Sihong Province Economic Development Zone, Suqian, West Ocean West Road, No. 6 Patentee after: Jiangsu Stick new materials Polytron Technologies Inc Address before: 215400 Taicang, Suzhou, Taicang Economic Development Zone, Qingdao West Road, No. 11, No. Patentee before: Suzhou Sidike New Material Science & Technology Co., Ltd. |