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CN106304783B - Thermal conductivity both-sided adhesive graphite flake - Google Patents

Thermal conductivity both-sided adhesive graphite flake Download PDF

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Publication number
CN106304783B
CN106304783B CN201610705947.1A CN201610705947A CN106304783B CN 106304783 B CN106304783 B CN 106304783B CN 201610705947 A CN201610705947 A CN 201610705947A CN 106304783 B CN106304783 B CN 106304783B
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China
Prior art keywords
graphite
parts
thermal conductivity
pet film
sided adhesive
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Application number
CN201610705947.1A
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Chinese (zh)
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CN106304783A (en
Inventor
金闯
梁豪
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Sidike New Materials Jiangsu Co Ltd
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Sidike New Materials Jiangsu Co Ltd
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Publication of CN106304783A publication Critical patent/CN106304783A/en
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    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
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    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
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  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Inorganic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Adhesive Tapes (AREA)

Abstract

The present invention discloses a kind of thermal conductivity both-sided adhesive graphite flake, the thermal conductivity both-sided adhesive graphite flake fits between radiating piece and heat generating components, the thermal conductivity both-sided adhesive graphite flake includes light strippable PET film and re-releasing type PET film, this light strippable PET film and re-releases and is disposed with the first thermally conductive adhesive layer, graphite linings and the second thermally conductive adhesive layer between type PET film；The graphite linings are coated with one layer graphite modified dose in the upper and lower surfaces of Kapton and obtain treated Kapton, and the graphite modified dose of group by following parts by weight is grouped as: 22 parts of benzophenone tetracarboxylic dianhydride, 15.6 parts of pyromellitic acid anhydride, 26 parts of diaminodiphenylmethane, 32 parts of dimethylformamide, 1.8 parts of ethylene glycol, 2.2 parts of dimethyl silicone polymer.The present invention rolls the carbonized film of the pre-burned using calender, the volume contraction for avoiding fold and being graphitized in sintering process.

Description

Thermal conductivity both-sided adhesive graphite flake
Technical field
The present invention relates to a kind of thermal conductivity both-sided adhesive graphite flakes, belong to double faced adhesive chip technology field.
Background technique
With modern microelectronic technology high speed development, electronic equipment (such as laptop, mobile phone, tablet computer) is increasingly Become ultra-thin, light, this structure significantly improves electronic equipment internal power density, and generated heat is not easy in operation It is discharged, is easy to accumulate rapidly and form high temperature.On the other hand, high temperature can reduce the performance of electronic equipment, reliability and use the longevity Life.Therefore, Current electronic industry proposes increasingly higher demands for the heat sink material as heat control system core component, urgently It needs a kind of high-efficiency heat conduction, light material to transfer heat away from rapidly, ensures that electronic equipment operates normally.
Kapton is mostly used for flexible circuit board in the prior art, is obtained although having using polyimide film sintered Graphite heat radiation fin, to be covered on heat source, but be constrained to Kapton product quality and performances the good and the bad not Together, influenced the performance of the two-sided pad pasting heat dissipation performance of heat dissipation, there are following technical problems: heat dissipation is uneven, adhesive tape easily occurs Hot-spot, the heat dissipation performance of product is unstable, reliability performance is poor, is unfavorable for product quality management control, influences the competition of product Power.
Summary of the invention
It is an object of the present invention to provide a kind of thermal conductivity both-sided adhesive graphite flakes, and the thermal conductivity both-sided adhesive graphite flake is vertical Direction and horizontal direction improve heating conduction, avoid adhesive tape hot-spot, realize the uniformity of adhesive tape heating conduction Meanwhile heat dissipation performance stability, the reliability of product are improved, greatly reduce the cost of product.
In order to achieve the above objectives, the technical solution adopted by the present invention is that: a kind of thermal conductivity both-sided adhesive graphite flake, it is described to lead Hot both-sided adhesive graphite flake fits between radiating piece and heat generating components, and the thermal conductivity both-sided adhesive graphite flake includes light stripping Release PET film and type PET film is re-released, this light strippable PET film and re-releases that be disposed with first between type PET film thermally conductive Adhesive layer, graphite linings and the second thermally conductive adhesive layer；It is characterized by: the graphite linings are obtained by following process, this work Process the following steps are included:
Step 1: Kapton is risen to 250 DEG C from room temperature, room temperature is down to after 400 DEG C are risen to after heat preservation；
Step 2: the upper and lower surfaces in the Kapton Jing Guo step 1 are coated with one layer of graphite modified dose of acquisition Treated Kapton, graphite modified dose of the viscosity are 30000 ~ 48000cP；
The graphite modified dose of group by following parts by weight is grouped as: 22 parts of benzophenone tetracarboxylic dianhydride, Pyromellitic Acid 15.6 parts of dianhydride, 26 parts of diaminodiphenylmethane, 32 parts of dimethylformamide, 1.8 parts of ethylene glycol, dimethyl silicone polymer 2.2 Part；
Step 3: by treated, Kapton is warming up to 800 DEG C, is warming up to 1200 DEG C, after heat preservation after heat preservation again It is cooling, to obtain the carbonized film of pre-burned；
Step 4: rolling the carbonized film of the pre-burned of the step 3 using calender；
Step 5: being warming up to 2400 DEG C, 2900 DEG C are warming up to after heat preservation again, it is cooling after heat preservation, to obtain main firing Graphite film；
Step 6: then the graphite film of the resulting main firing of step 5 carries out calendering to obtain the graphite linings, by institute It states step 6 and obtains graphite linings progress calendering process.
Further improved scheme is as follows in above-mentioned technical proposal:
In above scheme, the step 4 is obtained into graphite film and carries out calendering process.
In above scheme, the grammes per square metre of the light strippable PET film stripping power is 5 ~ 10g/m2。
In above scheme, the grammes per square metre for re-releasing type PET film peeling force is 50 ~ 100g/m2。
Since above-mentioned technical proposal is used, the present invention has following advantages and effect compared with prior art:
Thermal conductivity both-sided adhesive graphite flake of the present invention, graphite linings are coated with one layer of graphite by upper and lower surfaces and change in structure Property agent Kapton be prepared, improve heating conduction in the vertical direction and the horizontal direction, avoid adhesive tape local Overheat, realizes the uniformity of adhesive tape heating conduction；Secondly, it is located at graphite modified dose of Kapton surface by hexichol Ketone tetracid dianhydride, pyromellitic acid anhydride, diaminodiphenylmethane, dimethylformamide, ethylene glycol, dimethyl silicone polymer Composition is coated on Kapton, and the pin hole being filled in heating process improves crystallinity simultaneously, also overcomes heat Shrink it is excessive caused by it is uneven, improve graphite linings biaxial tension performance；Again, Kapton surface changes with graphite Property agent, improve graphite linings and thermally conductive adhesive layer heating conduction in two-sided pad pasting, and the pre-burned is rolled using calender Carbonized film, the volume contraction for avoiding fold and being graphitized in sintering process, improves compactness and crystallinity, further increases Heating conduction in the vertical direction and the horizontal direction.
Detailed description of the invention
Attached drawing 1 is thermal conductivity both-sided adhesive graphite flake structural schematic diagram of the present invention；
Attached drawing 2 is thermal conductivity both-sided adhesive graphite flake application schematic diagram of the present invention；
Attached drawing 3 is the partial structural diagram of attached drawing 1.
In the figures above: 1, radiating piece；2, heat generating components；3, light strippable PET film；4, type PET film is re-released；5, first Thermally conductive adhesive layer；6, graphite linings；7, the second thermally conductive adhesive layer.
Specific embodiment
The present invention will be further described below with reference to examples:
Embodiment: a kind of thermal conductivity both-sided adhesive graphite flake, the thermal conductivity both-sided adhesive graphite flake fit in radiating piece 1 Between heat generating components 2, the thermal conductivity both-sided adhesive graphite flake includes light strippable PET film 3 and re-releases type PET film 4, this Light strippable PET film 3 and re-release that the first thermally conductive adhesive layer 5, graphite linings 6 and second are disposed between type PET film 4 is thermally conductive Adhesive layer 7；The graphite linings 6 are obtained by following process, this process the following steps are included:
Step 1: Kapton is risen to 250 DEG C from room temperature with 4 ~ 6 degree/min speed, kept for 0.9 ~ 1.1 hour, Then with 2.5 ~ 3.5 degree/min, 400 DEG C are risen to, is down to room temperature after being kept for 1 hour；
Step 2: the upper and lower surfaces in the Kapton Jing Guo step 1 are coated with one layer of graphite modified dose of acquisition Treated Kapton, the graphite modified dose of group by following parts by weight are grouped as, as shown in table 1:
Table 1
Embodiment
Benzophenone tetracarboxylic dianhydride 22
Pyromellitic acid anhydride 15.6
Diaminodiphenylmethane 26
Dimethylformamide 32
Ethylene glycol 1.8
Dimethyl silicone polymer 2.2
Graphite modified dose of viscosity of embodiment is 42000CP；
Step 3: rising to 800 DEG C with the speed of 4 ~ 6 degree/min, kept for 0.9 ~ 1.1 hour；Again with the speed of 9 ~ 11 degree/min Degree rises to 1200 DEG C, cooling after being kept for 0.9 ~ 1.1 hour, to obtain the carbonized film of pre-burned；
Step 4: rolling the carbonized film of the pre-burned of the step 3 using calender；
Step 5: rising to 2400 DEG C with the speed of 19 ~ 21 degree/min, kept for 0.9 ~ 1.1 hour, then with 19 ~ 21 degree/min Speed rise to 2900 DEG C, it is cooling after being kept for 1.8 ~ 2.2 hours, to obtain the graphite film of main firing；
Step 6: then the graphite film of the resulting main firing of step 5 carries out calendering to obtain the graphite linings (6).
The step 6 is obtained into graphite linings and carries out calendering process.
The grammes per square metre of above-mentioned light 3 peeling force of strippable PET film is 5 ~ 10g/m2, gram for re-releasing 4 peeling force of type PET film Weight is 50 ~ 100g/m2。
When using above-mentioned thermal conductivity both-sided adhesive graphite flake, graphite linings are coated with one layer of stone by upper and lower surfaces in structure The Kapton of black modifying agent is prepared, and improves heating conduction in the vertical direction and the horizontal direction, avoids adhesive tape Hot-spot realizes the uniformity of adhesive tape heating conduction；Secondly, its be located at graphite modified dose of Kapton surface by Benzophenone tetracarboxylic dianhydride, pyromellitic acid anhydride, diaminodiphenylmethane, dimethylformamide, ethylene glycol, poly dimethyl silicon Oxygen alkane composition, is coated on Kapton, the pin hole being filled in heating process improves crystallinity simultaneously, also overcomes It is uneven caused by thermal contraction is excessive, improve graphite linings biaxial tension performance；Again, Kapton surface has stone Black modifying agent improves graphite linings and thermally conductive adhesive layer heating conduction in two-sided pad pasting, and rolls the pre-burning using calender The carbonized film of system, the volume contraction for avoiding fold and being graphitized in sintering process, improves compactness and crystallinity, further Improve heating conduction in the vertical direction and the horizontal direction.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.

Claims (3)

1. a kind of thermal conductivity both-sided adhesive graphite flake, the thermal conductivity both-sided adhesive graphite flake fits in radiating piece (1) and fever Between component (2), the thermal conductivity both-sided adhesive graphite flake includes light strippable PET film (3) and re-releases type PET film (4), this Light strippable PET film (3) and re-releasing be disposed between type PET film (4) the first thermally conductive adhesive layer (5), graphite linings (6) and Second thermally conductive adhesive layer (7)；It is characterized by: the graphite linings (6) are obtained by following process, this process includes Following steps:
Step 1: Kapton is risen to 250 DEG C from room temperature, room temperature is down to after 400 DEG C are risen to after heat preservation；
Step 2: the upper and lower surfaces in the Kapton Jing Guo step 1 are coated with one layer graphite modified dose and are handled Kapton afterwards, graphite modified dose of the viscosity are 30000 ~ 48000cP；
The graphite modified dose of group by following parts by weight is grouped as: 22 parts of benzophenone tetracarboxylic dianhydride, pyromellitic acid anhydride 15.6 parts, 26 parts of diaminodiphenylmethane, 32 parts of dimethylformamide, 1.8 parts of ethylene glycol, 2.2 parts of dimethyl silicone polymer；
Step 3: by treated, Kapton is warming up to 800 DEG C, is warming up to 1200 DEG C after heat preservation again, cooling after heat preservation, To obtain the carbonized film of pre-burned；
Step 4: rolling the carbonized film of the pre-burned of the step 3 using calender；
Step 5: being warming up to 2400 DEG C, 2900 DEG C are warming up to after heat preservation again, it is cooling after heat preservation, to obtain the graphite of main firing Film；
Step 6: then the graphite film of the resulting main firing of step 5 carries out rolling to obtain the graphite linings (6), it will be described Step 6 obtains graphite linings (6) and carries out calendering process.
2. thermal conductivity both-sided adhesive graphite flake according to claim 1, it is characterised in that: the light strippable PET film (3) The grammes per square metre of peeling force is 5 ~ 10g/m2。
3. thermal conductivity both-sided adhesive graphite flake according to claim 1, it is characterised in that: described to re-release type PET film (4) The grammes per square metre of peeling force is 50 ~ 100g/m2。
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CN201610777909.7A Pending CN106366971A (en) 2014-01-26 2014-01-26 High-heat-conductivity double-sided adhesive tape
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CN201610787521.5A Pending CN106535560A (en) 2014-01-26 2014-01-26 Manufacturing process for heat-conducting graphite paste films for flat computers
CN201610794749.7A Pending CN106398570A (en) 2014-01-26 2014-01-26 High-compactness graphite soaking adhesive tape
CN201610799197.9A Pending CN106381083A (en) 2014-01-26 2014-01-26 Isothermal pressure-sensitive adhesive tape used for intelligent mobile phones
CN201610777537.8A Pending CN106398567A (en) 2014-01-26 2014-01-26 Pressure sensitive adhesive tape for notebook computer
CN201610777340.4A Pending CN106398566A (en) 2014-01-26 2014-01-26 Double-face pad pasting with heat radiation
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CN201610696474.3A Pending CN106318250A (en) 2014-01-26 2014-01-26 Preparation process of thermal double-sided adhesive tape
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CN201410037378.9A Active CN103763892B (en) 2014-01-26 2014-01-26 Heat conduction graphite patch for microelectronic device
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CN201610794749.7A Pending CN106398570A (en) 2014-01-26 2014-01-26 High-compactness graphite soaking adhesive tape
CN201610799197.9A Pending CN106381083A (en) 2014-01-26 2014-01-26 Isothermal pressure-sensitive adhesive tape used for intelligent mobile phones
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CN201610777340.4A Pending CN106398566A (en) 2014-01-26 2014-01-26 Double-face pad pasting with heat radiation
CN201610696479.6A Pending CN106332521A (en) 2014-01-26 2014-01-26 Manufacturing method for double-sided adhesive graphite flake
CN201610696474.3A Pending CN106318250A (en) 2014-01-26 2014-01-26 Preparation process of thermal double-sided adhesive tape
CN201610777339.1A Pending CN106349964A (en) 2014-01-26 2014-01-26 Process for preparing heat-conduction double-sided adhesive tape
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