Preparation method of conductive and heat-conducting composite adhesive tape

Abstract

The invention discloses a preparation method of a conductive and heat-conducting composite adhesive tape. The preparation method comprises the following steps: 1, preparing a first adhesive and a second adhesive; 2, cleaning and drying the copper foil and the aluminum foil by using water and an organic solvent so as to remove oil stains and impurities on the surfaces of the copper foil and the aluminum foil; 3, coating the first adhesive on the bottom film by using coating equipment; fourthly, the treated copper foil and the treated aluminum foil are sequentially attached to the first adhesive from top to bottom and are tightly combined through hot pressing of hot pressing equipment; 5, the copper foil is coated with a second adhesive through coating equipment to form an adhesive tape, and according to the composite adhesive tape prepared through the method, the heat conductivity coefficient of the adhesive tape is increased, so that heat generated by an electronic element can be rapidly transferred out; the conductive performance of the adhesive tape is enhanced, and the electromagnetic shielding effect can be improved; meanwhile, the structural design of the adhesive tape is optimized, so that the adhesive tape can adapt to electronic equipment in different shapes and working environments, and uniform heat dissipation and electromagnetic shielding are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of EMI electromagnetic shielding and heat dissipation materials, and specifically discloses a preparation method of a conductive and heat-conductive composite tape. Background Art

[0002] With the continuous miniaturization and high intelligence of electronic devices, the heat generated by internal electronic components during operation and the problem of EMI electromagnetic interference are becoming increasingly serious.

[0003] EMI electromagnetic interference not only affects the normal operation of electronic devices, but also interferes with the signal transmission of other surrounding devices. In addition, if excessive heat of the device cannot be dissipated in time, it will lead to problems such as a decline in the performance of electronic components, a shortening of their lifespan, and frequent crashes of the device.

[0004] There are many deficiencies in the existing heat dissipation and electromagnetic shielding material technologies. Some traditional heat dissipation materials, such as ordinary thermal conductive silica gel sheets, although having a certain heat dissipation ability, perform poorly in terms of electrical conductivity and electromagnetic shielding effectiveness; there are also some conductive tapes that mainly focus on electromagnetic shielding, but the heat dissipation effect is not ideal. In addition, inside complex electronic devices, it is difficult for existing materials to achieve efficient heat conduction and uniform electromagnetic shielding.

[0005] Therefore, there is an urgent need to develop a material that can both dissipate heat efficiently and conduct electromagnetic shielding effectively. Summary of the Invention

[0006] To overcome the deficiencies of the prior art, the present invention discloses a preparation method of a conductive and heat-conductive composite tape.

[0007] To achieve the above object, the technical solution adopted by the present invention is: a preparation method of a conductive and heat-conductive composite tape, the conductive and heat-conductive composite tape includes a bottom film, a first adhesive, an aluminum foil, a copper foil, and a second adhesive arranged in sequence from bottom to top, the first adhesive and the second adhesive are conductive glue and / or heat-conductive glue, the aluminum foil has zebra-shaped stripes formed on at least one side in contact with the first adhesive, the copper foil has zebra-shaped stripes formed on at least one side in contact with the second adhesive, and the preparation method includes the following steps:

[0008] The first step is to prepare the first adhesive and the second adhesive;

[0009] The second step is to clean and dry the copper foil and the aluminum foil with water and organic solvents to remove the oil stains and impurities on their surfaces;

[0010] The third step is to coat the first adhesive on the bottom film with a coating device;

[0011] Step 4: Attach the processed copper foil and aluminum foil to the first adhesive layer from top to bottom in sequence, and then use a hot pressing device to hot press them to achieve tight bonding.

[0012] Step 5: Use a coating device to coat the second adhesive on the copper foil to form an adhesive tape.

[0013] As a preferred embodiment of the present invention, the water is deionized water.

[0014] As a preferred embodiment of the present invention, the organic solvent is ethanol.

[0015] As a preferred embodiment of the present invention, the thickness of the first adhesive and the second adhesive is 0.01 - 5 mm.

[0016] As a preferred embodiment of the present invention, the thickness of the copper foil is 0.01 - 5 mm.

[0017] As a preferred embodiment of the present invention, the thickness of the aluminum foil is 0.01 - 5 mm.

[0018] As a preferred embodiment of the present invention, the width and spacing of the zebra - shaped stripes are 2 - 100 mm.

[0019] As a preferred embodiment of the present invention, the bottom film is a polyester film.

[0020] The present invention achieves the following beneficial effects:

[0021] The composite tape prepared in this application can quickly transfer the heat generated by electronic components by increasing the thermal conductivity of the tape; enhance the electrical conductivity of the tape, which can improve the electromagnetic shielding effect; at the same time, optimize the structural design of the tape, enabling it to adapt to electronic devices of different shapes and working environments, and achieve uniform heat dissipation and electromagnetic shielding.

[0022] As for other features and advantages of the present invention, they will be described in the subsequent specification, and some will become obvious from the specification, or be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures pointed out in the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings herein are incorporated into the specification and form a part of the specification, showing embodiments in line with the disclosure of the present invention, and are used together with the specification to explain the principles of the present disclosure.

[0024] Figure 1 It is a schematic diagram of the overall structure of the conductive and heat - conductive composite adhesive disclosed in the present invention;

[0025] In the figure: 10, bottom film; 20, first adhesive; 30, aluminum foil; 40, copper foil; 50, second adhesive. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0027] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating the orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0028] Embodiment

[0029] To solve the problems existing in the heat dissipation and electromagnetic shielding material technologies in the prior art, referring to Figure 1 as shown, the present application discloses a preparation method of a conductive and heat-conductive composite tape. The conductive and heat-conductive composite tape includes a bottom film 10 (preferably a polyester film and needs to be torn off during use), a first adhesive 20, an aluminum foil 30, a copper foil 40, and a second adhesive 50 arranged in sequence from bottom to top. The first adhesive and the second adhesive are conductive adhesives and / or heat-conductive adhesives. The aluminum foil 30 has zebra-shaped stripes formed on at least one side in contact with the first adhesive 20, and the copper foil 40 has zebra-shaped stripes formed on at least one side in contact with the second adhesive 50 (not shown in the present application);

[0030] Among them, aluminum has good heat conductivity and certain electrical conductivity, and is relatively light in mass; it plays a role in assisting heat conduction and electromagnetic shielding in the tape structure; the aluminum foil 30 can further spread heat, making the heat evenly distributed throughout the tape and improving the heat dissipation efficiency;

[0031] Copper has good electrical conductivity and a high heat conduction coefficient. On the one hand, it can quickly conduct heat and transfer the heat absorbed by the second adhesive 50 to the aluminum foil 30 quickly; on the other hand, its good electrical conductivity can effectively shield electromagnetic interference;

[0032] During actual use, the second adhesive 50 is in direct contact with the electronic component or the heat dissipation device, can quickly absorb heat, and participates in electromagnetic shielding through its good electrical conductivity; the first adhesive 20 is used to further transfer the heat conducted through the copper foil 40 and the aluminum foil 30 to the heat dissipation system, and also plays a role in enhancing electromagnetic shielding;

[0033] The above-mentioned zebra stripe setting enables the tape to adapt to electronic components and devices of different shapes and surface conditions; whether it is a flat surface or a curved surface, it can be closely attached to achieve uniform heat dissipation and electromagnetic shielding.

[0034] The preparation method of the above-mentioned conductive and heat-conductive composite tape comprises the following steps:

[0035] First step, prepare the first adhesive 20 and the second adhesive 50;

[0036] Second step, use water (preferably deionized water) and an organic solvent (preferably ethanol) to clean and dry the copper foil 40 and the aluminum foil 30 so as to remove the oil stains and impurities on their surfaces;

[0037] Third step, coat the first adhesive 20 on the base film 10 with a coating device;

[0038] Fourth step, sequentially attach the treated copper foil 40 and aluminum foil 30 from top to bottom on the first adhesive 20 and hot-press them through a hot-pressing device to make them closely combined;

[0039] Fifth step, coat the second adhesive 50 on the copper foil 40 with a coating device to form an adhesive tape.

[0040] Among them, the thickness of the first adhesive 20 and the second adhesive 50 is 0.01 - 5 mm, the thickness of the copper foil 40 is 0.01 - 5 mm, the thickness of the aluminum foil 30 is 0.01 - 5 mm, and the width and spacing of the zebra-shaped stripes are 2 - 100 mm.

[0041] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0042] The above embodiments are only for illustrating the technical concept and characteristics of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A preparation method of a conductive and heat-conductive composite tape, the conductive and heat-conductive composite tape comprising a bottom film, a first adhesive, an aluminum foil, a copper foil, and a second adhesive arranged in sequence from bottom to top; the first adhesive and the second adhesive are conductive adhesives and / or heat-conductive adhesives, the aluminum foil is formed with zebra stripes on at least one surface in contact with the first adhesive, and the copper foil is formed with zebra stripes on at least one surface in contact with the second adhesive, characterized in that, The preparation method includes the following steps: First step, prepare the first adhesive and the second adhesive; Second step, clean and dry the copper foil and the aluminum foil with water and organic solvent to remove the oil stains and impurities on their surfaces; Third step, coat the first adhesive on the base film with a coating device; Fourth step, sequentially laminate the treated copper foil and aluminum foil onto the first adhesive from top to bottom and tightly bond them through hot pressing with a hot pressing device; Fifth step, coat the second adhesive on the copper foil with a coating device to form an adhesive tape.

2. The preparation method of a conductive and heat-conductive composite tape according to claim 1, wherein The water is deionized water.

3. A method for preparing a conductive and heat-conductive composite tape according to claim 1, characterized in that, The organic solvent is ethanol.

4. The preparation method of a conductive and heat-conductive composite tape according to claim 1, wherein, The thickness of the first adhesive and the second adhesive is 0.01 - 5 mm.

5. The preparation method of a conductive and heat-conductive composite tape according to claim 1, wherein, The thickness of the copper foil is 0.01 - 5 mm.

6. The preparation method of a conductive and heat-conductive composite tape according to claim 1, wherein, The thickness of the aluminum foil is 0.01 - 5 mm.

7. A method for preparing a conductive and heat-conductive composite tape according to claim 1, characterized in that, The width and spacing of the zebra-like stripes are 2 - 100 mm.

8. A method for preparing a conductive and heat-conductive composite tape according to claim 1, characterized in that, The base film is a polyester film.

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