CN114231207A - Ultrathin high-viscosity graphene heat-conducting double-sided adhesive tape and preparation method thereof - Google Patents

Ultrathin high-viscosity graphene heat-conducting double-sided adhesive tape and preparation method thereof Download PDF

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CN114231207A
CN114231207A CN202111532626.3A CN202111532626A CN114231207A CN 114231207 A CN114231207 A CN 114231207A CN 202111532626 A CN202111532626 A CN 202111532626A CN 114231207 A CN114231207 A CN 114231207A
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layer
graphene
preparation
double
acid adhesive
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吴君
丁先贵
麦启波
张锁柱
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Jiangsu Huangguan New Material Technology Co ltd
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Jiangsu Huangguan New Material Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/40—Adhesives in the form of films or foils characterised by release liners
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/255—Polyesters
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
    • C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Adhesive Tapes (AREA)

Abstract

The invention provides an ultrathin high-viscosity graphene heat-conducting double-sided tape and a preparation method thereof, and the ultrathin high-viscosity graphene heat-conducting double-sided tape comprises a first substrate layer; the first modified graphite allyl acid adhesive layer and the second modified graphite allyl acid adhesive layer are arranged on two sides of the first base material layer; the first antistatic transparent release film layer is arranged on one side, far away from the first base material layer, of the first modified graphene acrylic acid adhesive layer; according to the invention, only a small amount of graphene slurry is added into the acrylic adhesive, so that the graphene slurry can be uniformly distributed in the acrylic adhesive to form a uniform heat conduction chain net layer, and compared with a common heat conduction double-sided adhesive tape, the heat conduction double-sided adhesive tape has more excellent heat conduction performance on the premise of lower peeling force loss.

Description

Ultrathin high-viscosity graphene heat-conducting double-sided adhesive tape and preparation method thereof
Technical Field
The invention relates to the technical field of double-sided tapes, in particular to an ultrathin high-viscosity graphene heat-conducting double-sided tape and a preparation method thereof.
Background
Nowadays, electronic products have been widely popularized and developed to high integration and high operation fields, and the development of electronic products to light weight, miniaturization and thin shape is inevitable. In addition, the electronic manufacturing industry has a processing mode of assembling by using an electronic adhesive tape instead of screws, so that the wave of thinning and microminiaturization of electronic products is promoted. Accordingly, the unit dissipation power is multiplied, and the requirement on heat dissipation is higher and higher.
The graphite flake is widely applied to the field of electronic manufacturing and processing due to excellent heat conduction performance, for example, the heat dissipation of a CPU (Central processing Unit) needs to be assisted by the graphite flake, the low thermal resistance and ultrathin double-sided electronic adhesive tape are required to be selected for assembling for the jointing of the graphite flake and a radiator, when the traditional ultrathin adhesive tape is used on graphite or heat conduction materials, the thermal resistance can be reduced only by thinning the thickness of the adhesive tape to the maximum extent, and the heat dissipation assembly only has a better heat conduction effect in the plane direction (X, Y), but the heat conduction effect in the Z-axis direction is poor, so that the heat conduction coefficient of the heat conduction double-sided adhesive tape is generally smaller.
The double-sided tape is commonly added with various heat-conducting fillers or heat-conducting layers and improves the heat-conducting coefficient thereof to achieve the purpose of heat conduction, and the heat-conducting fillers are often added into the adhesive, such as: carbon black, carbon nano tubes, graphene, copper powder, boron nitride aluminum powder, silver powder and gold powder; the heat dissipation layer is then the carbon fiber that the complex has graphite alkene, and in order to reach the heat conduction purpose, the addition of heat conduction filler is more, leads to double-sided tape's physical properties not to reach high viscosity, can not realize ultra-thinly, can not satisfy the ultra-thin high requirement of graphite fin, tears from double-sided tape's from the type membrane simultaneously, has the production of a large amount of static, causes electrostatic absorption anomaly and static injury.
Disclosure of Invention
In view of the above, the invention provides an ultrathin high-viscosity graphene heat-conducting double-sided tape and a preparation method thereof, and solves the technical problems that in the prior art, the heat-conducting property of the double-sided tape is improved by adding a heat-conducting layer or adding a heat-conducting agent, so that the double-sided tape is thick, low in viscosity and unobvious in heat-conducting effect, and a large amount of static electricity is generated when a release film of the tape is torn.
According to a first aspect of the invention, the invention provides an ultrathin high-viscosity graphene heat-conducting double-sided tape, which comprises a first substrate layer; the first modified graphite allyl acid adhesive layer and the second modified graphite allyl acid adhesive layer are arranged on two sides of the first base material layer; the first antistatic transparent release film layer is arranged on one side, far away from the first base material layer, of the first modified graphene acrylic acid adhesive layer; the second anti-static transparent release film layer is arranged on one side of the second modified graphene acrylic acid adhesive layer far away from one side of the first base material layer.
In one possible embodiment, the first antistatic transparent release film layer comprises: a second substrate layer; the first antistatic functional layer is arranged on one side of the second base material layer; the setting is in first antistatic functional layer one side is close to the first type functional layer of first modification graphite allyl acrylic acid gluing agent layer one side.
In one possible embodiment, the second anti-static transparent release film layer includes: a third substrate layer; a second antistatic functional layer arranged on one side of the third base material layer; and the second release functional layer is arranged on one side of the second anti-static functional layer, close to one side of the second modified graphene allyl acid adhesive layer.
In one possible embodiment, the first substrate layer, the second substrate layer and the third substrate layer are all polyethylene terephthalate.
According to a second aspect of the invention, the invention provides a preparation method of an ultrathin high-viscosity graphene heat-conducting double-sided tape, which comprises the following preparation steps:
s1, coating a first antistatic function layer on the surface of the second substrate layer, carrying out thermal drying, coating a first release function layer on the first antistatic function layer, and carrying out thermal drying to prepare a first antistatic transparent release film;
s2, coating a second anti-static functional layer on the surface of the third substrate layer, carrying out thermal drying, coating a second release functional layer on the second anti-static functional layer, carrying out thermal drying, and preparing to obtain a second anti-static transparent release film;
s3, coating a first modified graphene acrylic acid adhesive layer on the first antistatic transparent release film in the step S1, carrying out thermal drying, and then attaching and rolling the first modified graphene acrylic acid adhesive layer and the first base material layer to form a single surface;
and S4, coating a second modified graphene allyl acid adhesive layer on the second anti-static transparent release film in the step S2, carrying out thermal drying, attaching the second modified graphene allyl acid adhesive layer to the single surface in the step S3, and rolling to form the graphene double-sided adhesive tape.
In one possible embodiment, the temperature of the thermal drying in steps S1, S2, S3 and S4 is 110-120 ℃, and the time of the thermal drying is 30-60 seconds.
In one possible embodiment, the first modified graphene allylic acid adhesive layer and the second modified graphene allylic acid adhesive layer are both obtained by mixing graphene slurry with an acrylic acid adhesive.
In one possible embodiment, the weight of the graphene paste accounts for 1-5% of the total weight of the modified graphene allyl acid adhesive.
In one possible embodiment, the graphene slurry is obtained by dissolving high thermal conductivity graphene in a solvent, wherein the weight of the high thermal conductivity graphene accounts for 1-10% of the total weight of the graphene slurry.
In one possible embodiment, the solvent is a mixed solution of ethyl acetate and acetone, and the ratio of the ethyl acetate to the acetone is 9-10: 1.
According to the invention, the two sides of the first substrate layer are respectively coated with the modified graphene acrylic acid adhesive layer and the antistatic transparent release film layer to form the heat-conducting double-sided tape with heat conducting property, so that the heat-conducting double-sided tape also has heat conducting property in the longitudinal direction, the acrylic acid adhesive layer is prevented from being hindered by the adhesive layer during heat conduction to influence the heat dissipation effect, the performance of a product is improved, and the service life of the product is prolonged, and the heat-conducting double-sided tape is ultrathin in thickness, high in viscosity, 6-30 mu m in thickness and more than or equal to 600gf/25mm in viscosity; according to the invention, only a small amount of graphene slurry is added into the modified acrylic adhesive, so that the graphene slurry can be uniformly distributed in the modified graphene acrylic adhesive layer to form a better heat conduction chain net layer, and the double-sided tape has no particle points or crystal points on the surface, and has more excellent heat conduction performance on the premise of ultrathin thickness and low peeling force loss compared with a common graphene double-sided tape.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the descriptions in the prior art will be briefly described below, it is obvious that the drawings described below are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a cross-sectional view of a double-sided adhesive tape according to an embodiment of the present invention;
fig. 2 is a display diagram of a double-sided adhesive tape provided in embodiment 2 of the present invention under a metallographic microscope;
fig. 3 is a display diagram of a double-sided adhesive tape provided in embodiment 3 of the present invention under a metallographic microscope.
Description of reference numerals:
100-a first substrate layer; 101-a first modified graphene acrylic acid adhesive layer; 102-a second modified graphene acrylic acid adhesive layer;
200-a first antistatic transparent release film layer; 201-a second substrate layer; 202-a first antistatic functional layer; 203-a first release functional layer;
300-a second anti-static transparent release film layer; 301-a third substrate layer; 302-a second antistatic functional layer; 303-second release functional layer.
Detailed Description
Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are provided for the purpose of illustration only and are not intended to limit the scope of the invention. Those skilled in the art can make various modifications and substitutions to the present invention without departing from the spirit and scope of the present invention,
the experimental procedures used in the following examples are all conventional procedures unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
The acrylic adhesive used in the following examples was AG07D, manufactured by jiangsu Huangguan New materials science and technology limited.
High thermal conductivity graphene, TYPE-A, produced by Henan Enli New Material science and technology Limited.
Example 1
An ultrathin high-viscosity graphene heat-conducting double-sided tape comprises a first substrate layer; the first modified graphite allyl acid adhesive layer and the second modified graphite allyl acid adhesive layer are arranged on two sides of the first base material layer; the first antistatic transparent release film layer is arranged on one side, far away from the first base material layer, of the first modified graphene acrylic acid adhesive layer; the second anti-static transparent release film layer is arranged on one side of the second modified graphene acrylic acid adhesive layer, far away from one side of the first base material layer.
The first antistatic transparent release film layer comprises: a second substrate layer; the first antistatic functional layer is arranged on one side of the second base material layer; the first release function layer is arranged on one side of the first antistatic function layer and close to one side of the first modified graphene acrylic acid adhesive layer.
The second antistatic transparent release film layer comprises: a third substrate layer; the second antistatic functional layer is arranged on one side of the third base material layer; the second release functional layer is arranged on one side of the second anti-static functional layer, close to one side of the second modified graphene allyl acid adhesive layer.
The first base material layer, the second base material layer and the third base material layer are all polyethylene terephthalate.
A preparation method of an ultrathin high-viscosity graphene heat-conducting double-sided tape comprises the following steps:
s1, coating a first antistatic function layer 202 on the surface of a second base material layer 201 with the thickness of 25 microns, putting the second base material layer into an oven for thermal drying at the temperature of 110 ℃ for 30 seconds, coating a first release function layer 203 on the first antistatic function layer 202 after thermal drying, putting the second base material layer into the oven for thermal drying at the temperature of 110 ℃ for 30 seconds, and preparing to obtain a first antistatic transparent release film 200;
s2, coating a second anti-static functional layer 302 on the surface of a third base material layer 301 with the thickness of 38 mu m, putting the third base material layer into an oven for thermal drying at the temperature of 110 ℃ for 30 seconds, coating a second release functional layer 303 on the second anti-static functional layer 302 after thermal drying, putting the second base material layer into the oven for thermal drying at the temperature of 110 ℃ for 30 seconds, and preparing to obtain a second anti-static transparent release film 300;
s3, mixing the high-thermal-conductivity graphene which accounts for 5% of the weight of the graphene slurry with a solvent, fully dissolving the graphene to obtain the graphene slurry, wherein the solvent is a mixed solution of ethyl acetate and acetone, and the ethyl acetate and the acetone are mixed according to a ratio of 9: 1;
s4, stirring the graphene slurry prepared in the step S3 and a modified acrylic acid adhesive according to the weight accounting for 2% of the total weight of the modified graphene allyl acid adhesive to form a modified graphene allyl acid adhesive to be coated;
s5, coating a 2-micrometer-thick modified graphite allyl acid adhesive on the first antistatic transparent release film layer 200 prepared in the step S1, carrying out thermal drying at the temperature of 110 ℃ for 30 seconds, and then attaching and rolling the first antistatic transparent release film layer to a first substrate layer with the thickness of 1.5 micrometers to form a single surface;
s6, coating a 2-micrometer-thick modified graphene acrylic acid adhesive on the second anti-static transparent release film layer 300 prepared in the step S2, carrying out thermal drying at the temperature of 110 ℃ for 30 seconds, and then attaching and rolling the second anti-static transparent release film layer to the single surface in the step S5 to form the ultrathin high-viscosity graphene heat-conducting double-sided tape.
The thickness of the ultrathin high-viscosity graphene heat-conducting double-sided tape prepared in example 1 is 6 μm; the performance of the ultrathin high-viscosity graphene heat-conducting double-sided tape finally prepared in example 1 is detected, and the detection results are shown in table 1.
Example 2
The structure of the heat-conductive double-sided tape of embodiment 2 is the same as that of embodiment 1;
the embodiment of example 2 is substantially the same as the embodiment of example 1 except that:
stirring the prepared graphene slurry and a modified acrylic acid adhesive in an amount which is 5% of the total amount of the modified graphene acrylic acid adhesive by weight to form the modified graphene acrylic acid adhesive to be coated;
the thickness of the ultrathin high-viscosity graphene heat-conducting double-sided tape prepared in the embodiment 2 is 6 μm, the prepared ultrathin high-viscosity graphene heat-conducting double-sided tape is amplified by 10 times under a metallographic microscope to observe whether particle points or crystal points exist on the surface of the tape, and as a result, the tape is shown in fig. 1, as shown in fig. 1, graphene slurry can be uniformly dispersed in the modified acrylic adhesive, and the prepared ultrathin high-viscosity graphene heat-conducting double-sided tape is uniform in appearance and free of particle points or crystal points.
The performance of the ultrathin high-viscosity graphene heat-conducting double-sided tape finally prepared in the embodiment 2 is detected, and the detection result is shown in table 1.
Example 3
Embodiment 3 is the same in structure as the heat conductive double-sided tape of embodiment 1;
the embodiment of example 3 is substantially the same as the embodiment of example 1 except that:
stirring the prepared graphene slurry and a modified acrylic acid adhesive in an amount which is 10% of the total amount of the modified graphene acrylic acid adhesive by weight to form the modified graphene acrylic acid adhesive to be coated;
the thickness of the ultrathin high-viscosity graphene heat-conducting double-sided tape prepared in the embodiment 3 is 6 μm, the prepared ultrathin high-viscosity graphene heat-conducting double-sided tape is amplified by 10 times under a metallographic microscope to observe whether particle points or crystal points exist on the surface of the tape, and as a result, the tape is shown in fig. 3, as shown in fig. 3, the phenomenon that graphene slurry is non-uniformly agglomerated and dispersed in a modified graphene acrylic acid adhesive layer occurs, and the particle points and the crystal points appear on the surface of the double-sided tape.
The performance of the ultrathin high-viscosity graphene heat-conducting double-sided tape finally prepared in the embodiment 3 is detected, and the detection result is shown in table 1.
Example 4
Embodiment 4 is the same in structure as the heat conductive double-sided tape of embodiment 1;
the embodiment of example 4 is substantially the same as the embodiment of example 1 except that:
stirring the prepared graphene slurry and a modified acrylic acid adhesive in an amount which is 5% of the total amount of the modified graphene acrylic acid adhesive by weight to form the modified graphene acrylic acid adhesive to be coated;
the thickness of the ultrathin high-viscosity graphene heat-conducting double-sided tape prepared in example 4 is 10 μm;
the performance of the ultrathin high-viscosity graphene heat-conducting double-sided tape finally prepared in the embodiment 4 is detected, and the detection result is shown in table 1.
Example 5
The structure of the heat-conductive double-sided tape of embodiment 5 is the same as that of embodiment 1;
the embodiment of example 5 is substantially the same as the embodiment of example 1 except that:
stirring the prepared graphene slurry and a modified acrylic acid adhesive in an amount which is 5% of the total amount of the modified graphene acrylic acid adhesive by weight to form the modified graphene acrylic acid adhesive to be coated;
the thickness of the ultrathin high-viscosity graphene heat-conducting double-sided tape prepared in example 5 is 20 μm;
the performance of the ultrathin high-viscosity graphene heat-conducting double-sided tape finally prepared in the embodiment 5 is detected. The results are shown in Table 1.
Comparative example 1
The structure of the heat conductive double-sided tape of comparative example 1 is the same as that of example 1;
the embodiment of comparative example 1 is substantially the same as the embodiment of example 1 except that:
graphene slurry is not added into the modified graphene acrylic acid adhesive layer;
the thickness of the double-sided tape prepared by comparative example 1 was 6 μm;
comparative example 1 the properties of the finally prepared double-sided adhesive tape were measured, and the results are shown in table 1.
TABLE 1 results of testing the properties of the double-sided tapes of examples 1 to 5 and comparative example 1
Figure BDA0003411959920000081
As can be seen from the detection results of the embodiments 1 to 5 and the comparative example 1, since the graphene slurry is added to the acrylic adhesive, and the high-thermal-conductivity graphene is uniformly distributed in the acrylic adhesive by the high-precision coating technology, the double-sided tape also has the thermal conductivity in the longitudinal direction, the graphite layer is prevented from being hindered by the adhesive layer to affect the heat dissipation effect during heat conduction, and the thermal conductivity coefficient of the double-sided tape is remarkably improved.
1. According to the detection results of the embodiments 1 to 3, when the thicknesses of the double-sided tapes are the same, the thermal conductivity of the double-sided tape prepared by the method is increased along with the increase of the addition proportion of the graphene slurry, and when the addition proportion of the graphene slurry is 10%, although the thermal conductivity of the double-sided tape prepared by the method is the maximum and reaches 0.852W/m · K, because the thickness of the double-sided tape is ultra-thin, the graphene is agglomerated and dispersed unevenly, the appearance of the double-sided tape has abnormalities such as 'particle point' and 'crystal point', and the peeling force of the double-sided tape is gradually reduced along with the increase of the addition proportion of the graphene slurry.
2. According to the test results of examples 2,4-5, it can be seen that, although the peeling force of the double-sided tape is increased with the increase of the thickness of the double-sided tape, the thermal conductivity is decreased, and when the thickness of the double-sided tape is 20 μm, the peeling force of the double-sided tape is the highest and reaches 1456g/inch, but the thermal conductivity is the lowest and is 0.185W/m · K;
3. according to the detection results of the examples 2 to 3 and the comparative example 1, under the condition that the thickness of the double-sided adhesive tape is the same, the thermal conductivity coefficient of the double-sided adhesive tape without adding the graphene paste into the acrylic adhesive is lower than that of the double-sided adhesive tape with adding the graphene paste into the acrylic adhesive.
4. The graphene slurry is added into the acrylic adhesive, when the addition proportion of the graphene slurry is 1% -5%, according to the results of the embodiment 1-2, the graphene slurry can be uniformly distributed in the acrylic adhesive to form a better heat conduction chain net layer, and heat conduction can be carried out in the longitudinal direction of the adhesive layer, so that the heat conduction coefficient is obviously improved, the stripping force of the adhesive tape is higher, the appearance is uniform and abnormal, and the adhesive tape is thinner.
The invention only adds a small amount of graphene slurry in the acrylic adhesive, which only accounts for 1-5% of the total weight of the modified graphene acrylic acid adhesive, can ensure that the graphene can be uniformly distributed in the modified graphene acrylic acid adhesive layer, and because the addition amount of the high-thermal-conductivity graphene is small, the graphene can form a uniform thermal-conductive chain network layer in the modified graphene acrylic acid adhesive layer, so that the modified graphene acrylic acid adhesive layer has thermal conductivity, the thickness of the prepared double-sided tape is ultrathin, is only 6-30 mu m, the viscosity is more than or equal to 600gf/25mm, compared with a common double-sided tape, the double-sided tape has more excellent thermal conductivity on the premise of lower peeling force loss, can be applied to the field of electronic manufacturing and processing, and can be used for bonding elements of planar materials such as graphite sheets and the like on the surface needing heat dissipation, the quick heat dissipation effect is achieved, the problem that the graphite layer is obstructed by the adhesive layer to affect the heat dissipation effect when conducting heat is avoided, and the performance and the service life of the product are improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.

Claims (10)

1. The utility model provides an ultra-thin high viscosity graphite alkene heat conduction double sticky tape which characterized in that: comprises a first substrate layer (100);
a first modified graphite allyl acid adhesive layer (101) and a second modified graphite allyl acid adhesive layer (102) which are arranged on two sides of the first base material layer (100);
the first antistatic transparent release film layer (200) is arranged on one side, far away from the first base material layer (100), of the first modified graphene acrylic acid adhesive layer (101);
the second anti-static transparent release film layer (300) is arranged on one side of the second modified graphene acrylic acid adhesive layer (102) far away from one side of the first base material layer (100).
2. The ultrathin high-viscosity graphene heat-conducting double-sided tape as claimed in claim 1, characterized in that: the first antistatic transparent release film layer (200) comprises:
a second base material layer (201);
the first antistatic function layer (202) is arranged on one side of the second base material layer (201);
the first release function layer (203) that sets up and be close to first modification graphite allyl acrylic acid gluing agent layer (101) one side on one side of antistatic function layer (202).
3. The ultrathin high-viscosity graphene heat-conducting double-sided tape as claimed in claim 2, characterized in that: the second antistatic transparent release film layer (300) comprises:
a third base material layer (301);
a second antistatic functional layer (302) provided on the third base material layer (301) side;
and the second release functional layer (303) is arranged on one side of the second antistatic functional layer (302) close to one side of the second modified graphene acrylic acid adhesive layer (102).
4. The ultrathin high-viscosity graphene heat-conducting double-sided tape as claimed in claim 3, characterized in that: the first substrate layer (100), the second substrate layer (200) and the third substrate layer (300) are all polyethylene terephthalate.
5. The preparation method of the ultrathin high-viscosity graphene heat-conducting double-sided tape as claimed in any one of claims 1 to 4, wherein the preparation method comprises the following steps: the preparation method comprises the following preparation steps:
s1, coating a first antistatic function layer (202) on the surface of the second base material layer (201) and carrying out thermal drying, coating a first release function layer (203) on the first antistatic function layer (202) and carrying out thermal drying to prepare a first antistatic transparent release film (200);
s2, coating a second anti-static functional layer (302) on the surface of the third base material layer (301) and carrying out thermal drying, coating a second release functional layer (303) on the second anti-static functional layer (302) and carrying out thermal drying to prepare a second anti-static transparent release film (300);
s3, coating a first modified graphene acrylic acid adhesive layer (101) on the first antistatic transparent release film (200) in the step S1, carrying out heat drying, and then attaching and rolling the first modified graphene acrylic acid adhesive layer and the first substrate layer (100) to form a single surface;
and S4, coating a second modified graphene allyl acid adhesive layer (102) on the second anti-static transparent release film (300) in the step S2, carrying out thermal drying, and then laminating and rolling the second modified graphene allyl acid adhesive layer and the single side in the step S3 to form the graphene double-sided adhesive tape.
6. The preparation method of the ultrathin high-viscosity graphene heat-conducting double-sided tape as claimed in claim 5, wherein the preparation method comprises the following steps: the temperature of the thermal drying in the steps S1, S2, S3 and S4 is 110-120 ℃, and the time of the thermal drying is 30-60 seconds.
7. The preparation method of the ultrathin high-viscosity graphene heat-conducting double-sided tape as claimed in claim 5, wherein the preparation method comprises the following steps: the first modified graphene allyl acid adhesive layer (101) and the second modified graphene allyl acid adhesive layer (102) are obtained by mixing graphene slurry and a modified acrylic acid adhesive.
8. The preparation method of the ultrathin high-viscosity graphene heat-conducting double-sided tape as claimed in claim 7, wherein the preparation method comprises the following steps: the weight of the graphene slurry accounts for 1-5% of the total weight of the modified graphene allyl acid adhesive.
9. The preparation method of the ultrathin high-viscosity graphene heat-conducting double-sided tape as claimed in claim 8, wherein the preparation method comprises the following steps: the graphene slurry is obtained by dissolving high-thermal-conductivity graphene in a solvent, wherein the weight of the high-thermal-conductivity graphene accounts for 1-10% of the total weight of the graphene slurry.
10. The preparation method of the ultrathin high-viscosity graphene heat-conducting double-sided tape as claimed in claim 9, wherein the preparation method comprises the following steps: the solvent is a mixed solution of ethyl acetate and acetone, and the ratio of the ethyl acetate to the acetone is 9-10: 1.
CN202111532626.3A 2021-12-15 2021-12-15 Ultrathin high-viscosity graphene heat-conducting double-sided adhesive tape and preparation method thereof Pending CN114231207A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110014443A1 (en) * 2008-03-10 2011-01-20 The Furukawa Electric Co., Ltd Adhesive tape for electronic component fabrication
CN109679536A (en) * 2019-01-08 2019-04-26 德阳烯碳科技有限公司 A kind of preparation method of ultra-thin graphene heat-conducting glue layer
CN210481272U (en) * 2019-07-31 2020-05-08 江苏皇冠新材料科技有限公司 Flexible double-sided adhesive tape

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110014443A1 (en) * 2008-03-10 2011-01-20 The Furukawa Electric Co., Ltd Adhesive tape for electronic component fabrication
CN109679536A (en) * 2019-01-08 2019-04-26 德阳烯碳科技有限公司 A kind of preparation method of ultra-thin graphene heat-conducting glue layer
CN210481272U (en) * 2019-07-31 2020-05-08 江苏皇冠新材料科技有限公司 Flexible double-sided adhesive tape

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