CN109777316A - A kind of high thermal conductivity graphite glue band and preparation method thereof - Google Patents
A kind of high thermal conductivity graphite glue band and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of high thermal conductivity graphite glue bands and preparation method thereof, including off-style paper layer, thermally conductive adhesive layer, graphite linings and the metal layer being cascading, the graphite linings are made of the raw material that following parts by weight match: graphite powder, polyimide resin, dimethylformamide, ethylene glycol, coupling agent, age resister.High thermal conductivity graphite glue band provided by the invention, thermal conducting agent is added in thermally conductive adhesive layer, so that adhesive layer also has heating conduction, avoiding obstruction of graphite linings when thermally conductive by adhesive layer is influenced heat dissipation effect, improve performance and the service life of product, metal layer is pasted in graphite layer surface, improve the thermal conductivity along length, also improve thickness direction thermal conductivity, realize the uniformity of adhesive tape heating conduction, adhesive tape hot-spot is avoided, performance and the service life of product are improved, there is substantive distinguishing features outstanding and significant progress.
Description
Technical field
The present invention relates to technical field of lithium batteries, specially a kind of high thermal conductivity graphite glue band and preparation method thereof.
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.In the prior art
Kapton is mostly used for flexible circuit board, although having using polyimide film sintered acquisition graphite heat radiation fin, thus
Be covered on heat source, but be constrained to Kapton product quality and performances it is very different, it is double to have influenced heat dissipation
The performance of mask heat dissipation performance, there are following technical problems: heat dissipation is uneven, adhesive tape hot-spot easily occurs, improves production
The heat dissipation performance of product is unstable, reliability performance is poor, is unfavorable for product quality management control, influences the competitiveness of product.For this purpose, we
It is proposed a kind of high thermal conductivity graphite glue band and preparation method thereof.
Summary of the invention
The purpose of the present invention is to provide a kind of high thermal conductivity graphite glue bands and preparation method thereof, to solve above-mentioned background technique
The problem of middle proposition.
To achieve the above object, the invention provides the following technical scheme:
A kind of high thermal conductivity graphite glue band, including off-style paper layer, thermally conductive adhesive layer, graphite linings and the metal being cascading
Layer, the thermally conductive adhesive layer are made of the raw material that following parts by weight match: 52-64 parts of methyl vinyl silicone rubber, epoxy
47-55 parts of resin, 25-33 parts of thermal conducting agent, 8-12 parts of crosslinking agent, 5-7 parts of curing agent, 4-8 parts of organic solvent;
The graphite linings are made of the raw material that following parts by weight match: 88-113 parts of graphite powder, polyimide resin
75-87 parts, 22-28 parts of dimethylformamide, 13-17 parts of ethylene glycol, 7-9 parts of coupling agent, 5-8 parts of age resister.
Preferably, the thermal conducting agent is according to the ratio that weight ratio is 5:6:4 by aluminium oxide, aluminium nitride, boron nitride through table
Activating agent modification in face mixes, and the crosslinking agent is in methyl trimethoxy radical siloxane, ethyl orthosilicate or silicon nitrogen oligomer
One kind, the curing agent are one of amine curing agent or acid anhydride type curing agent, and the organic solvent is n-hexane or petroleum
One of ether.
Preferably, the surfactant is one of metal carboxylate or phosphoric acid ester activating agent.
Preferably, the preparation method of the thermal conducting agent includes the following steps:
Step 1: it is put into reaction kettle after aluminium oxide, aluminium nitride, boron nitride are mixed, stirs, be warming up to 124-146 DEG C;
Step 2: surfactant is added in reaction kettle, is then warming up to 216-238 with the speed of 8-10 DEG C/min
DEG C, continue to stir 43-48min, reaction terminates, is cooled to room temperature to obtain thermal conducting agent.
Preferably, the coupling agent is maleic anhydride graft compatilizer and KH-550 silane coupling agent according to (3-5): 2
Weight ratio mixes, age resister UV age resister.
Preferably, the metal layer is that copper mesh and aluminium net are interwoven.
A kind of preparation method of high thermal conductivity graphite glue band, comprising the following steps:
The preparation of S1, thermally conductive adhesive layer:
S11, methyl vinyl silicone rubber and epoxy resin are added sequentially in open mill, are warming up to 78-94 DEG C of progress
It is kneaded, after being kneaded uniformly, thermal conducting agent, crosslinking agent and organic solvent is added sequentially in open mill, are warming up to 122-138 DEG C,
It is kneaded 30-50min;
S12, after the mixture in step S11 is cooled to 82-96 DEG C in open mill, open mill is added in curing agent
In, it is kneaded 20-30min and obtains semi-finished product;
S13, the obtained semi-finished product of step S12 are squeezed out through screw extruder, obtains heat-conducting glue sticking material;
The preparation of S2, graphite linings:
S21, graphite powder, polyimide resin, dimethylformamide, ethylene glycol, coupling agent and age resister are successively added
Enter into reaction kettle, stirs, be warming up to 83-95 DEG C, be filled with nitrogen pressure maintaining, be warming up to 232-253 DEG C of constant temperature 1h;
S22, it is placed under vacuum environment, natural cooling, obtains graphite layer material;
S3, off-style paper layer is placed on coating machine through coating speed being set, by thermally conductive adhesive layer after line sided corona treatment
Material and graphite layer material are successively uniformly applied on off-style paper layer, then by metal layer hot pressing in graphite linings, at 20-30 DEG C
Closed environment under stand 5-6h, obtain sheet adhesive tape;
S4, sheet adhesive tape is sent into the hot blast drying in drying tunnel with 60-70 DEG C, then carries out winding cutting, height can be obtained
Heat conductive graphite adhesive tape.
Preferably, the coating speed that the coating machine is set is 8-12m/min.
Compared with prior art, the beneficial effects of the present invention are: high thermal conductivity graphite glue band provided by the invention, in heat-conducting glue
Thermal conducting agent is added in adhesion coating and avoids graphite linings when thermally conductive by the resistance of adhesive layer so that adhesive layer also has heating conduction
Hinder influence heat dissipation effect, improves performance and the service life of product, metal layer is pasted in graphite layer surface, that is, improve along length
Thermal conductivity, also improve thickness direction thermal conductivity, realize the uniformity of adhesive tape heating conduction, avoid adhesive tape hot-spot,
Performance and the service life of product are improved, there is substantive distinguishing features outstanding and significant progress.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
The invention provides the following technical scheme:
Embodiment 1
A kind of high thermal conductivity graphite glue band, including off-style paper layer, thermally conductive adhesive layer, graphite linings and the metal being cascading
Layer, thermally conductive adhesive layer are made of the raw material that following parts by weight match: 52 parts of methyl vinyl silicone rubber, epoxy resin 47
Part, 25 parts of thermal conducting agent, 8 parts of crosslinking agent, 5 parts of curing agent, 4 parts of organic solvent;
Graphite linings are made of the raw material that following parts by weight match: 88 parts of graphite powder, 75 parts of polyimide resin, diformazan
22 parts of base formamide, 13 parts of ethylene glycol, 7 parts of coupling agent, 5 parts of age resister.
Thermal conducting agent is according to the ratio that weight ratio is 5:6:4 by aluminium oxide, aluminium nitride, boron nitride through surfactant-modified
It mixes, crosslinking agent is one of methyl trimethoxy radical siloxane, ethyl orthosilicate or silicon nitrogen oligomer, and curing agent is amine
One of curing agent or acid anhydride type curing agent, organic solvent are one of n-hexane or petroleum ether, and surfactant is carboxylic
One of Barbiturates or phosphoric acid ester activating agent.
The preparation method of thermal conducting agent includes the following steps:
Step 1: it is put into reaction kettle after aluminium oxide, aluminium nitride, boron nitride are mixed, stirs, be warming up to 124 DEG C;
Step 2: surfactant is added in reaction kettle, is then warming up to 216 DEG C with the speed of 8 DEG C/min, is continued
43min is stirred, reaction terminates, is cooled to room temperature to obtain thermal conducting agent.
Coupling agent is that maleic anhydride graft compatilizer and KH-550 silane coupling agent are mixed according to the weight ratio of 3:2,
Age resister UV age resister, metal layer are that copper mesh and aluminium net are interwoven.
A kind of preparation method of high thermal conductivity graphite glue band, comprising the following steps:
The preparation of S1, thermally conductive adhesive layer:
S11, methyl vinyl silicone rubber and epoxy resin are added sequentially in open mill, are warming up to 78 DEG C and are mixed
Thermal conducting agent, crosslinking agent and organic solvent are added sequentially in open mill by refining after being kneaded uniformly, are warming up to 122 DEG C, are kneaded
30min;
S12, after the mixture in step S11 is cooled to 82 DEG C in open mill, curing agent is added in open mill, is mixed
Refining 20min obtains semi-finished product;
S13, the obtained semi-finished product of step S12 are squeezed out through screw extruder, obtains heat-conducting glue sticking material;
The preparation of S2, graphite linings:
S21, graphite powder, polyimide resin, dimethylformamide, ethylene glycol, coupling agent and age resister are successively added
Enter into reaction kettle, stirs, be warming up to 83 DEG C, be filled with nitrogen pressure maintaining, be warming up to 232 DEG C of constant temperature 1h;
S22, it is placed under vacuum environment, natural cooling, obtains graphite layer material;
S3, off-style paper layer is placed on coating machine through after line sided corona treatment, setting coating speed, what coating machine was set
Coating speed is 8m/min, and heat-conducting glue sticking material and graphite layer material are successively uniformly applied on off-style paper layer, then will
Metal layer hot pressing stands 5h under 20 DEG C of closed environment in graphite linings, obtains sheet adhesive tape;
S4, sheet adhesive tape is sent into the hot blast drying in drying tunnel with 60 DEG C, then carries out winding cutting, high thermal conductivity can be obtained
Graphite glue band.
Embodiment 2
A kind of high thermal conductivity graphite glue band, including off-style paper layer, thermally conductive adhesive layer, graphite linings and the metal being cascading
Layer, thermally conductive adhesive layer are made of the raw material that following parts by weight match: 58 parts of methyl vinyl silicone rubber, epoxy resin 51
Part, 29 parts of thermal conducting agent, 10 parts of crosslinking agent, 6 parts of curing agent, 6 parts of organic solvent;
Graphite linings are made of the raw material that following parts by weight match: 100 parts of graphite powder, 81 parts of polyimide resin, two
25 parts of methylformamide, 15 parts of ethylene glycol, 8 parts of coupling agent, 7 parts of age resister.
Thermal conducting agent is according to the ratio that weight ratio is 5:6:4 by aluminium oxide, aluminium nitride, boron nitride through surfactant-modified
It mixes, crosslinking agent is one of methyl trimethoxy radical siloxane, ethyl orthosilicate or silicon nitrogen oligomer, and curing agent is amine
One of curing agent or acid anhydride type curing agent, organic solvent are one of n-hexane or petroleum ether, and surfactant is carboxylic
One of Barbiturates or phosphoric acid ester activating agent.
The preparation method of thermal conducting agent includes the following steps:
Step 1: it is put into reaction kettle after aluminium oxide, aluminium nitride, boron nitride are mixed, stirs, be warming up to 135 DEG C;
Step 2: surfactant is added in reaction kettle, is then warming up to 227 DEG C with the speed of 9 DEG C/min, is continued
46min is stirred, reaction terminates, is cooled to room temperature to obtain thermal conducting agent.
Coupling agent is that maleic anhydride graft compatilizer and KH-550 silane coupling agent are mixed according to the weight ratio of 4:2,
Age resister UV age resister, metal layer are that copper mesh and aluminium net are interwoven.
A kind of preparation method of high thermal conductivity graphite glue band, comprising the following steps:
The preparation of S1, thermally conductive adhesive layer:
S11, methyl vinyl silicone rubber and epoxy resin are added sequentially in open mill, are warming up to 86 DEG C and are mixed
Thermal conducting agent, crosslinking agent and organic solvent are added sequentially in open mill by refining after being kneaded uniformly, are warming up to 130 DEG C, are kneaded
40min;
S12, after the mixture in step S11 is cooled to 89 DEG C in open mill, curing agent is added in open mill, is mixed
Refining 25min obtains semi-finished product;
S13, the obtained semi-finished product of step S12 are squeezed out through screw extruder, obtains heat-conducting glue sticking material;
The preparation of S2, graphite linings:
S21, graphite powder, polyimide resin, dimethylformamide, ethylene glycol, coupling agent and age resister are successively added
Enter into reaction kettle, stirs, be warming up to 89 DEG C, be filled with nitrogen pressure maintaining, be warming up to 242 DEG C of constant temperature 1h;
S22, it is placed under vacuum environment, natural cooling, obtains graphite layer material;
S3, off-style paper layer is placed on coating machine through after line sided corona treatment, setting coating speed, what coating machine was set
Coating speed is 10m/min, and heat-conducting glue sticking material and graphite layer material are successively uniformly applied on off-style paper layer, then will
Metal layer hot pressing stands 5.5h under 25 DEG C of closed environment in graphite linings, obtains sheet adhesive tape;
S4, sheet adhesive tape is sent into the hot blast drying in drying tunnel with 65 DEG C, then carries out winding cutting, high thermal conductivity can be obtained
Graphite glue band.
Embodiment 3
A kind of high thermal conductivity graphite glue band, including off-style paper layer, thermally conductive adhesive layer, graphite linings and the metal being cascading
Layer, thermally conductive adhesive layer are made of the raw material that following parts by weight match: 64 parts of methyl vinyl silicone rubber, epoxy resin 55
Part, 33 parts of thermal conducting agent, 12 parts of crosslinking agent, 7 parts of curing agent, 8 parts of organic solvent;
Graphite linings are made of the raw material that following parts by weight match: 113 parts of graphite powder, 87 parts of polyimide resin, two
28 parts of methylformamide, 17 parts of ethylene glycol, 9 parts of coupling agent, 8 parts of age resister.
Thermal conducting agent is according to the ratio that weight ratio is 5:6:4 by aluminium oxide, aluminium nitride, boron nitride through surfactant-modified
It mixes, crosslinking agent is one of methyl trimethoxy radical siloxane, ethyl orthosilicate or silicon nitrogen oligomer, and curing agent is amine
One of curing agent or acid anhydride type curing agent, organic solvent are one of n-hexane or petroleum ether, and surfactant is carboxylic
One of Barbiturates or phosphoric acid ester activating agent.
The preparation method of thermal conducting agent includes the following steps:
Step 1: it is put into reaction kettle after aluminium oxide, aluminium nitride, boron nitride are mixed, stirs, be warming up to 146 DEG C;
Step 2: surfactant is added in reaction kettle, is then warming up to 238 DEG C with the speed of 10 DEG C/min, after
Continuous stirring 48min, reaction terminate, are cooled to room temperature to obtain thermal conducting agent.
Coupling agent is that maleic anhydride graft compatilizer and KH-550 silane coupling agent are mixed according to the weight ratio of 5:2,
Age resister UV age resister, metal layer are that copper mesh and aluminium net are interwoven.
A kind of preparation method of high thermal conductivity graphite glue band, comprising the following steps:
The preparation of S1, thermally conductive adhesive layer:
S11, methyl vinyl silicone rubber and epoxy resin are added sequentially in open mill, are warming up to 94 DEG C and are mixed
Thermal conducting agent, crosslinking agent and organic solvent are added sequentially in open mill by refining after being kneaded uniformly, are warming up to 138 DEG C, are kneaded
50min;
S12, after the mixture in step S11 is cooled to 96 DEG C in open mill, curing agent is added in open mill, is mixed
Refining 30min obtains semi-finished product;
S13, the obtained semi-finished product of step S12 are squeezed out through screw extruder, obtains heat-conducting glue sticking material;
The preparation of S2, graphite linings:
S21, graphite powder, polyimide resin, dimethylformamide, ethylene glycol, coupling agent and age resister are successively added
Enter into reaction kettle, stirs, be warming up to 95 DEG C, be filled with nitrogen pressure maintaining, be warming up to 253 DEG C of constant temperature 1h;
S22, it is placed under vacuum environment, natural cooling, obtains graphite layer material;
S3, off-style paper layer is placed on coating machine through after line sided corona treatment, setting coating speed, what coating machine was set
Coating speed is 12m/min, and heat-conducting glue sticking material and graphite layer material are successively uniformly applied on off-style paper layer, then will
Metal layer hot pressing stands 6h under 30 DEG C of closed environment in graphite linings, obtains sheet adhesive tape;
S4, sheet adhesive tape is sent into the hot blast drying in drying tunnel with 70 DEG C, then carries out winding cutting, high thermal conductivity can be obtained
Graphite glue band.
Performance test
The graphite glue band of common two kinds of different brands in the market is chosen, as a comparison case 1 and comparative example 2, by embodiment
The thermal coefficient of graphite glue band and the performance of tensile strength of graphite glue band made from 1-3 and comparative example 1-2 are tested, and are obtained
Result as shown in table 1 below:
Table 1
Density (g/cm3) | Thermal coefficient (w/mk) | Tensile strength (Mpa) | |
Embodiment 1 | 3.12 | 576 | 107 |
Embodiment 2 | 3.41 | 592 | 121 |
Embodiment 3 | 3.28 | 581 | 114 |
Comparative example 1 | 2.44 | 287 | 76 |
Comparative example 2 | 2.63 | 305 | 85 |
It can be obtained by 1 data of table, using high thermal conductivity graphite glue band produced by the present invention, compared to comparative example 1 and comparative example
2, thermal coefficient is higher, and therefore, more preferably, tensile strength is more preferable for heat-conducting effect, therefore is sufficient for all kinds of sophisticated electronic products
Radiating requirements.
High thermal conductivity graphite glue band provided by the invention, is added thermal conducting agent in thermally conductive adhesive layer, so that adhesive layer also has
Heating conduction, avoiding obstruction of graphite linings when thermally conductive by adhesive layer is influenced heat dissipation effect, improve product performance and
Service life pastes metal layer in graphite layer surface, that is, improves the thermal conductivity along length, also improves thickness direction thermal conductivity,
The uniformity for realizing adhesive tape heating conduction avoids adhesive tape hot-spot, improves performance and the service life of product, has outstanding
Substantive distinguishing features and significant progress.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of high thermal conductivity graphite glue band, including off-style paper layer, thermally conductive adhesive layer, graphite linings and the metal being cascading
Layer, which is characterized in that the thermally conductive adhesive layer is made of the raw material that following parts by weight match: methyl vinyl silicone rubber
52-64 parts, 47-55 parts of epoxy resin, 25-33 parts of thermal conducting agent, 8-12 parts of crosslinking agent, 5-7 parts of curing agent, 4-8 parts of organic solvent;
The graphite linings are made of the raw material that following parts by weight match: 88-113 parts of graphite powder, polyimide resin 75-87
Part, 22-28 parts of dimethylformamide, 13-17 parts of ethylene glycol, 7-9 parts of coupling agent, 5-8 parts of age resister.
2. a kind of high thermal conductivity graphite glue band according to claim 1, it is characterised in that: the thermal conducting agent be by aluminium oxide,
Aluminium nitride, boron nitride are mixed according to the ratio that weight ratio is 5:6:4 through surfactant-modified, and the crosslinking agent is methyl
One of trimethicone, ethyl orthosilicate or silicon nitrogen oligomer, the curing agent are that amine curing agent or anhydride are solid
One of agent, the organic solvent are one of n-hexane or petroleum ether.
3. a kind of high thermal conductivity graphite glue band according to claim 2, it is characterised in that: the surfactant is carboxylate
One of class or phosphoric acid ester activating agent.
4. a kind of high thermal conductivity graphite glue band according to claim 3, it is characterised in that: the preparation method packet of the thermal conducting agent
Include following steps:
Step 1: it is put into reaction kettle after aluminium oxide, aluminium nitride, boron nitride are mixed, stirs, be warming up to 124-146 DEG C;
Step 2: surfactant is added in reaction kettle, is then warming up to 216-238 DEG C with the speed of 8-10 DEG C/min,
Continue to stir 43-48min, reaction terminates, is cooled to room temperature to obtain thermal conducting agent.
5. a kind of high thermal conductivity graphite glue band according to claim 1, it is characterised in that: the coupling agent connects for maleic anhydride
Branch compatilizer and KH-550 silane coupling agent are according to (3-5): 2 weight ratio mixes, age resister UV age resister.
6. a kind of high thermal conductivity graphite glue band according to claim 1, it is characterised in that: the metal layer is copper mesh and aluminium net
It is interwoven.
7. a kind of prepare a kind of preparation method of high thermal conductivity graphite glue band described in claim 1-6, which is characterized in that including with
Lower step:
The preparation of S1, thermally conductive adhesive layer:
S11, methyl vinyl silicone rubber and epoxy resin are added sequentially in open mill, are warming up to 78-94 DEG C and are kneaded,
After being kneaded uniformly, thermal conducting agent, crosslinking agent and organic solvent are added sequentially in open mill, are warming up to 122-138 DEG C, is kneaded
30-50min;
S12, after the mixture in step S11 is cooled to 82-96 DEG C in open mill, curing agent is added in open mill, is mixed
Refining 20-30min obtains semi-finished product;
S13, the obtained semi-finished product of step S12 are squeezed out through screw extruder, obtains heat-conducting glue sticking material;
The preparation of S2, graphite linings:
S21, graphite powder, polyimide resin, dimethylformamide, ethylene glycol, coupling agent and age resister are added sequentially to
In reaction kettle, stirring is warming up to 83-95 DEG C, is filled with nitrogen pressure maintaining, is warming up to 232-253 DEG C of constant temperature 1h;
S22, it is placed under vacuum environment, natural cooling, obtains graphite layer material;
S3, off-style paper layer is placed on coating machine through coating speed being set, by heat-conducting glue sticking material after line sided corona treatment
It is successively uniformly applied on off-style paper layer with graphite layer material, it is close at 20-30 DEG C then by metal layer hot pressing in graphite linings
Closed loop stands 5-6h under border, obtains sheet adhesive tape;
S4, sheet adhesive tape is sent into the hot blast drying in drying tunnel with 60-70 DEG C, then carries out winding cutting, high thermal conductivity can be obtained
Graphite glue band.
8. a kind of preparation method of high thermal conductivity graphite glue band according to claim 7, it is characterised in that: the coating machine is set
Fixed coating speed is 8-12m/min.
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CN114479580A (en) * | 2022-03-10 | 2022-05-13 | 桂林清研皓隆新材料有限公司 | Graphene composite heat dissipation coating and preparation method thereof, and heat dissipation adhesive tape and preparation method thereof |
CN116922897A (en) * | 2023-07-21 | 2023-10-24 | 惠州市帕克威乐新材料有限公司 | High-voltage-resistant heat-conducting adhesive film and preparation method thereof |
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