CN109152276A - A kind of manufacturing method of novel heat-conducting graphite flake - Google Patents

A kind of manufacturing method of novel heat-conducting graphite flake Download PDF

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Publication number
CN109152276A
CN109152276A CN201711033867.7A CN201711033867A CN109152276A CN 109152276 A CN109152276 A CN 109152276A CN 201711033867 A CN201711033867 A CN 201711033867A CN 109152276 A CN109152276 A CN 109152276A
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China
Prior art keywords
parts
graphite flake
heat
manufacturing
novel heat
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CN201711033867.7A
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Chinese (zh)
Inventor
秦荣月
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Wuhu Hwichan Electronic Technology Co Ltd
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Wuhu Hwichan Electronic Technology Co Ltd
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Priority to CN201711033867.7A priority Critical patent/CN109152276A/en
Publication of CN109152276A publication Critical patent/CN109152276A/en
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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
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • 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
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
    • 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
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B32B5/20—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material foamed in situ
    • 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
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
    • B32B9/007—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile comprising carbon, e.g. graphite, composite carbon
    • 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
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
    • C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
    • C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • 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
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • 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
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/302—Conductive
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
    • 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
    • B32B2457/00—Electrical equipment

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

The present invention relates to mobile phones to manufacture production technical field, specifically, it is a kind of manufacturing method of novel heat-conducting graphite flake, it the use of graphite flake made of this method include graphite flake layer, graphite flake layer upper surface is coated with Kapton, Kapton upper surface is coated with coat, the upper surface of coat is coated with heat-insulated foamed resin layer, the lower surface of graphite flake layer is coated with heat conduction silicone, structure of the invention design is reasonable, allow the present invention with to the seamless contact of thermal component by the setting of heat conductive silica gel, improves its heat transfer efficiency；The directionality that the conduction of heat has；The intensity for improving graphite flake layer is allowed to be less prone to picking and phenomenon of rupture, prolong its service life.

Description

A kind of manufacturing method of novel heat-conducting graphite flake
Technical field
The present invention relates to mobile phones to manufacture production technical field, specifically, being a kind of manufacturer of novel heat-conducting graphite flake Method, the novel heat-conducting graphite flake being fabricated can be used for mobile phone electric panel.
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.
Heat conductive graphite piece is a kind of completely new heat conduction and heat radiation material, has unique crystal grain orientation, in both directions uniformly It is thermally conductive, it is laminar structured to be well adapted for any surface, shielding heat source and improvement consumer electronics product while component Performance, product Homogeneouslly-radiating while, which also provides in terms of thickness, to be thermally isolated.
Kapton is mostly used for flexible circuit board in the prior art, although having using polyimide film sintered acquisition stone Black cooling fin to be covered on heat source, but is constrained to very different, the shadow of the product quality and performances of Kapton Ring the performance for having arrived the two-sided pad pasting heat dissipation performance of heat dissipation, there are following technical problems: heat dissipation is uneven, hot-spot easily occurs, The heat dissipation performance for improving product is unstable, reliability performance is poor, is unfavorable for product quality management control, influences the competitiveness of product.
Summary of the invention
The present invention discloses a kind of manufacturing method of novel heat-conducting graphite flake, manufactured heat conductive graphite piece in vertical direction and Horizontal direction improves heating conduction, avoids hot-spot, while realizing the uniformity of heating conduction, improves production Heat dissipation performance stability, the reliability of product, greatly reduce the cost of product.
A kind of manufacturing method specific technical solution of novel heat-conducting graphite flake of present disclosure is as follows:
A kind of manufacturing method of novel heat-conducting graphite flake, comprising the following steps:
Step 1: coating graphite modified dose in the upper surface of Kapton obtains treated Kapton；
Step 2: will that treated is cooling after Kapton is warming up to 1200 DEG C, to obtain the carbonized film of pre-burned；
Step 3: the carbonized film of the pre-burned using calender calendaring processes two；
Step 4: cooling covering is to graphite flake layer after carbonized film is warming up to 2850 DEG C -2950 DEG C, to obtain the stone of main firing Ink sheet；
Step 5: then by the coating of the upper surface of the graphite flake of the resulting main firing of step 4 by the foaming of Foamex glue into every Heat foamable resin layer, lower surface coated with thermally conductive layer of silica gel carry out calendering again to obtain novel heat-conducting graphite flake.
Further improvement of the present invention, in step 5, lower surface coated with thermally conductive layer of silica gel with a thickness of 50-200 microns.
Further improvement of the present invention, the graphite modified dose of group by following parts by weight in step 1 are grouped as: hexichol first 20-25 parts of ketone tetracid dianhydride, 14-16 parts of pyromellitic acid anhydride, 22-26 parts of diaminodiphenylmethane, dimethylformamide 20-25 parts, 8-10 parts of N-Methyl pyrrolidone, 1.8-2.5 parts of ethylene glycol, 2.5-3 parts of dimethyl silicone polymer, polyvinyl fluoride 3- 5 parts.
Further improvement of the present invention, the graphite modified dose of group by following parts by weight in step 1 are grouped as: hexichol first 25 parts of ketone tetracid dianhydride, 15 parts of pyromellitic acid anhydride, 25 parts of diaminodiphenylmethane, 20 parts of dimethylformamide, N- first 10 parts of base pyrrolidones, 2.0 parts of ethylene glycol, 2.5 parts of dimethyl silicone polymer, 4 parts of polyvinyl fluoride.
Beneficial effects of the present invention: the bottom of graphite flake made of the manufacturing method of present disclosure novel heat-conducting graphite flake Be provided with heat conduction silicone, heat conduction silicone can with to the seamless contact of thermal component, therefore can be by the heat to thermal component Amount quickly exports and plays heat-insulated effect since graphite flake layer upper end is provided with heat-insulated foamed resin layer to graphite flake layer, The directionality for having the conduction of heat, heat conduct on two-dimension graphite sheet, and in addition the setting of heat-insulated foamed resin layer also rises To good buffer function, the probability that graphite flake is damaged by other component compressing is reduced, graphite flake layer and heat-insulated foaming are set The Kapton being arranged between rouge layer improves the intensity of graphite flake layer, is allowed to be less prone to picking and phenomenon of rupture, prolong Its long service life.
Specific embodiment
In order to deepen the understanding of the present invention, below in conjunction with embodiment, the invention will be described in further detail, the reality It applies example for explaining only the invention, protection scope of the present invention is not constituted and limited.
A kind of embodiment: manufacturing method of novel heat-conducting graphite flake, comprising the following steps:
Step 1: coating graphite modified dose in the upper surface of Kapton obtains treated Kapton；
Step 2: will that treated is cooling after Kapton is warming up to 1200 DEG C, to obtain the carbonized film of pre-burned；
Step 3: the carbonized film of the pre-burned using calender calendaring processes two；
Step 4: cooling covering is to graphite flake layer after carbonized film is warming up to 2850 DEG C -2950 DEG C, to obtain the stone of main firing Ink sheet；
Step 5: then by the coating of the upper surface of the graphite flake of the resulting main firing of step 4 by the foaming of Foamex glue into every Heat foamable resin layer, lower surface coated with thermally conductive layer of silica gel carry out calendering again to obtain novel heat-conducting graphite flake.
In the present embodiment, in step 5, lower surface coated with thermally conductive layer of silica gel with a thickness of 50-200 microns；In step 1 The graphite modified dose of group by following parts by weight be grouped as: 20-25 parts of benzophenone tetracarboxylic dianhydride, pyromellitic acid anhydride 14- 16 parts, 22-26 parts of diaminodiphenylmethane, 20-25 parts of dimethylformamide, 8-10 parts of N-Methyl pyrrolidone, ethylene glycol 1.8-2.5 parts, 2.5-3 parts of dimethyl silicone polymer, 3-5 parts of polyvinyl fluoride, further, 25 parts of benzophenone tetracarboxylic dianhydride, 15 parts of pyromellitic acid anhydride, 25 parts of diaminodiphenylmethane, 20 parts of dimethylformamide, 10 parts of N-Methyl pyrrolidone, second 2.0 parts of glycol, 2.5 parts of dimethyl silicone polymer, 4 parts of polyvinyl fluoride.
Basic principles and main features and advantage of the invention have been shown and described above.The technical staff of the industry should Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle It is fixed.

Claims (4)

1. a kind of manufacturing method of novel heat-conducting graphite flake, it is characterised in that: the following steps are included:
Step 1: coating graphite modified dose in the upper surface of Kapton obtains treated Kapton；
Step 2: will that treated is cooling after Kapton is warming up to 1200 DEG C, to obtain the carbonized film of pre-burned；
Step 3: rolling the carbonized film of the pre-burned of the step 2 using calender；
Step 4: cooling covering is to graphite flake layer after carbonized film is warming up to 2850 DEG C -2950 DEG C, to obtain the stone of main firing Ink sheet；
Step 5: then by the coating of the upper surface of the graphite flake of the resulting main firing of step 4 by the foaming of Foamex glue into every Heat foamable resin layer, lower surface coated with thermally conductive layer of silica gel carry out calendering again to obtain novel heat-conducting graphite flake.
2. the manufacturing method of novel heat-conducting graphite flake according to claim 1, it is characterised in that: in the step 5, under Surface coated with thermally conductive layer of silica gel with a thickness of 50-200 microns.
3. the manufacturing method of novel heat-conducting graphite flake according to claim 1 or 2, it is characterised in that: in the step 1 The graphite modified dose of group by following parts by weight be grouped as: 20-25 parts of benzophenone tetracarboxylic dianhydride, pyromellitic acid anhydride 14- 16 parts, 22-26 parts of diaminodiphenylmethane, 20-25 parts of dimethylformamide, 8-10 parts of N-Methyl pyrrolidone, ethylene glycol 1.8-2.5 parts, 2.5-3 parts of dimethyl silicone polymer, 3-5 parts of polyvinyl fluoride.
4. the manufacturing method of novel heat-conducting graphite flake according to claim 3, it is characterised in that: the stone in the step 1 Black modifying agent is grouped as by the group of following parts by weight: 25 parts of benzophenone tetracarboxylic dianhydride, 15 parts of pyromellitic acid anhydride, and diamino 25 parts of base diphenyl-methane, 20 parts of dimethylformamide, 10 parts of N-Methyl pyrrolidone, 2.0 parts of ethylene glycol, polydimethylsiloxanes 2.5 parts of alkane, 4 parts of polyvinyl fluoride.
CN201711033867.7A 2017-10-30 2017-10-30 A kind of manufacturing method of novel heat-conducting graphite flake Withdrawn CN109152276A (en)

Priority Applications (1)

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CN201711033867.7A CN109152276A (en) 2017-10-30 2017-10-30 A kind of manufacturing method of novel heat-conducting graphite flake

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Application Number Priority Date Filing Date Title
CN201711033867.7A CN109152276A (en) 2017-10-30 2017-10-30 A kind of manufacturing method of novel heat-conducting graphite flake

Publications (1)

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CN109152276A true CN109152276A (en) 2019-01-04

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Country Status (1)

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Application publication date: 20190104