Preparation method of electrified viscosity-reducing adhesive tape

Abstract

According to the preparation method of the power-on viscosity-reducing adhesive tape, the additive, the thermal curing agent and the photocatalyst are added into the adhesive material and mixed, and then the two curing processes of thermal curing and UV light curing are performed, so that the anti-shearing capacity and stripping efficiency of the power-on viscosity-reducing adhesive tape can be remarkably improved, and the performance of the adhesive tape is still stable after the adhesive tape is repeatedly used for multiple times.

Description

Technical Field

[0001] The invention relates to a manufacturing technology of an adhesive material, in particular to a method for preparing a reusable electrified adhesive tape. Background Art

[0002] The statements herein merely provide background information related to the present disclosure and do not necessarily constitute prior art.

[0003] Electrically-applied adhesive tape (also known as "electrolytic adhesive tape" or "electrically-peelable tape") includes an adhesive layer and a conductive layer for lossless separation at low voltage. By applying voltage on both sides of its adhesive layer, the peeling force can be reduced. This tape contains conductive materials, including cations and anions. When a voltage is applied to the tape, these conductive materials undergo an electrolytic reaction: cations move to the cathode and undergo a reduction reaction, and anions move to the anode and undergo an oxidation reaction. This reaction can weaken the bonding interface, thereby significantly reducing the adhesive force of the tape. Specifically, the electrically-applied adhesive tape exhibits strong adhesion and retention when it is not powered, and is suitable for occasions that require strong adhesion. After power is applied, the adhesive force of the tape will rapidly weaken, allowing the tape to be easily peeled off from the adherend. This technology is particularly suitable for occasions that require quick disassembly and re-adhesion, such as assembly and repair of electronic equipment. In order to solve the problem of adhesive strength and difficulty in disassembly of tapes in the design and production of electronic products, the electrically-applied adhesive tape should be easy to disassemble and reuse while maintaining high and reliable adhesive strength.

[0004] With the EU's implementation of the Electronic Product Repair Act, which aims to reduce material waste and promote the convenience of self-repair by consumers, this issue has recently attracted widespread attention in the electronics industry. The market is beginning to need energized de-viscosity tape technology for various scenarios. According to the inventor's understanding, the current production process needs to be further improved. For example, document 1 uses conductive salts such as ammonium salts, halogenated carbonates, and organic sulfonates containing alkali metals as conductive media, and mixes the conductive salts with polar aprotic solvents. For example, methoxy polyethylene glycol is used in document 2 to improve its repeated use performance. At present, domestic Gote Company, Japan's Nitto Company, and the United States' 3M Company have successively launched solutions for energized de-viscosity tape.

[0005] Document 1: China Invention Patent Publication, Publication No. CN115895519A

[0006] Document 2: China Invention Patent Publication, Publication No. CN118389082A Summary of the invention

[0007] In order to prepare an electrically conductive adhesive tape comprising an adhesive layer and a conductive layer, the present invention provides a method for preparing an electrically conductive adhesive tape, comprising:

[0008] S1. Adding additives to the rubber material and mixing them, wherein the additives include quaternary ammonium salt ionic liquid and anionic emulsifier, and the rubber material includes ethyl acetate;

[0009] The adhesive layer in the adhesive tape is prepared by using a rubber compound to form an adhesive layer with bonding properties. In actual production, the required components are selected to form the rubber compound according to the actual adhesive performance requirements and the adhesive layer is prepared according to the necessary process. This is common knowledge in the art and will not be described in detail. The rubber compound and specific processing process in the present invention can be any rubber compound component that can achieve an adhesive effect, except for the specifically limited schemes.

[0010] Ethyl acetate (also known as ethyl acetate) is used as a solvent in the adhesive material in the present invention. It does not have strong acidity or strong alkalinity, can be well matched with the quaternary ammonium salt ionic liquid in the additive and the conductive cations and anions in the anionic emulsifier, and can exist simultaneously in the prepared adhesive tape without affecting the reversible change process of the conductive effect. It can significantly improve the efficiency of reducing the bonding strength under the condition of power on, and can improve the reversibility of the power-on viscosity reduction, thereby improving the effect of repeated use of the adhesive tape and making the performance of the adhesive tape stable after repeated use.

[0011] The selection of anionic emulsifiers in the present invention is not limited to a specific type, and can be common anionic emulsifiers such as fatty acid salts (such as sodium stearate, sodium oleate, etc.), alkyl sulfates (such as sodium dodecyl sulfate), alkyl sulfonates (such as sodium dodecylbenzene sulfonate), etc., or other types of anionic emulsifiers or anionic carriers of other non-anionic emulsifiers.

[0012] S2, adding a thermal curing agent and a photocatalyst to the mixture obtained in S1 and mixing;

[0013] In the present invention, a thermosetting agent and a photocatalyst are added and mixed. The purpose of adding both thermosetting agent and photocatalyst is to carry out two curing processes, namely, thermal curing and UV light curing, in the subsequent step. The order of adding the thermosetting agent and the photocatalyst does not need to be limited. It is only necessary to add both the thermosetting agent and the photocatalyst and mix them with the mixture in S1. For example, one of the thermosetting agent and the photocatalyst can be added first, or both can be added together, or any one or two of them can be added as needed after both are added. The use of thermosetting agents and photocatalysts to achieve the corresponding thermal curing and photocatalytic processes themselves and the methods for achieving them are common knowledge in the art and will not be elaborated on. In addition to the specifically limited schemes, the thermosetting agent and the photocatalyst in the present invention can be selected from any components that can achieve the corresponding thermal curing and photocatalytic effects.

[0014] S3, coating the mixture on the conductive layer;

[0015] How to implement the coating process of the mixture is common knowledge in the art and will not be elaborated on. Unless further specified in the present invention, any coating method can be selected, and no further restrictions are required on the coating operation or equipment. For example, the mixture can be coated on the conductive layer by manual coating or coating equipment.

[0016] S4, heating and curing;

[0017] After the coating is completed in S3, the coating layer is heated to achieve thermal curing; for example, a baking device can be used to heat the coating layer, and the conductive layer coated with the coating layer can be placed in the baking device for heating to achieve thermal curing of the coating layer. The principle and operation of using heating to achieve coating curing is a basic common sense in the field, and will not be elaborated in the present invention. Except for further limitation, the thermal curing in the present invention can select any method that can achieve thermal curing.

[0018] S5. UV curing.

[0019] After heating and curing in S4, the coating layer is UV cured. For example, a handheld UV lamp or a fixed UV light irradiation device can be used to irradiate the coating layer to achieve UV curing. The principle and operation of UV curing are basic common sense in the field and will not be elaborated in the present invention. Except for further limitation, the UV curing in the present invention can be selected in any achievable manner.

[0020] The present invention uses two curing methods, heating curing and UV curing. Heating curing is performed first and then UV curing. The combination of the two curing methods can fully cure the structure to be cured in the coating layer, ensure the strength of the coating on the tape after curing, and significantly improve the shear resistance of the tape.

[0021] Furthermore, the mass of the quaternary ammonium salt ionic liquid is 10-30% of the mass of the rubber material, and the mass of the anionic emulsifier is 3-10% of the mass of the rubber material.

[0022] The use of quaternary ammonium salt ionic liquid and anionic emulsifier within this mass ratio range can not only ensure the effect of power-on decompression, but also take into account the adhesive strength of the tape. However, the present invention does not exclude the situation where the content of the quaternary ammonium salt ionic liquid and anionic emulsifier is outside the above mass ratio range, which will not affect the implementation of the solution.

[0023] Furthermore, the mass ratio of the quaternary ammonium salt ionic liquid to the anionic emulsifier is (3-5):1.

[0024] The working principle of electrolytic adhesive tape is mainly based on electrolytic reaction, including cations (quaternary ammonium salts provide cations) and anions (anionic emulsifiers provide anions). When voltage is applied to the tape, these conductive materials will undergo electrolytic reaction: cations move to the cathode and undergo reduction reaction, and anions move to the anode and undergo oxidation reaction. This reaction can weaken the bonding interface, thereby significantly reducing the adhesion of the tape.

[0025] Cathode - quaternary ammonium salts gain electrons, their valence decreases, and a reduction reaction occurs. The main function of cations is to maintain the electric field and adhesive effect, so that the peeling force of the tape is maintained at a high level, such as maintaining it at about 3000gf per unit distance. Anode - anionic emulsifiers lose electrons, their valence increases, and an oxidation reaction occurs. The main function of anions is to debond. Under the action of the electric field, the amount of electron migration must be large. To achieve the debonding effect, more than the cation component is required. When the mass ratio of quaternary ammonium salt ionic liquid and anionic emulsifier is (3-5):1, the proportion of anions can be greater than that of cations, improving the debonding effect while taking into account the adhesive strength of the tape.

[0026] Furthermore, ethyl acetate accounts for 1-10% of the mass of the adhesive. Using ethyl acetate in this mass ratio range can ensure the dissolution effect of the adhesive without affecting the adhesive strength.

[0027] Furthermore, the rubber compound also includes: ethyl acrylate, isobornyl acrylate, alkyl acrylate, aliphatic polyurethane acrylate, hydroxypropyl methacrylate, and a defoaming agent, wherein: ethyl acrylate accounts for 15-30% of the mass of the rubber compound, isobornyl acrylate accounts for 10-30% of the mass of the rubber compound, alkyl acrylate accounts for 20-35% of the mass of the rubber compound, aliphatic polyurethane acrylate accounts for 10-20% of the mass of the rubber compound, hydroxypropyl methacrylate accounts for 1-10% of the mass of the rubber compound, and the defoaming agent accounts for 1-4% of the mass of the rubber compound.

[0028] The sum of the mass percentages of the various components in the rubber compound when they constitute the rubber compound is 100%, so it is obvious that each component cannot take the minimum range at the same time. According to actual use needs, adjustments and selections are made within the above-mentioned proportion ranges of the various components. It is common sense in the art to make necessary adjustments to the mass proportions of the various components to obtain a rubber compound containing the above-mentioned various components, which will not be elaborated here.

[0029] Ethyl acrylate, alkyl acrylate and hydroxypropyl methacrylate are used in rubber compounds, have excellent stability, have good compatibility with other ingredients, and can improve the stability of the adhesive layer of the tape.

[0030] Isobornyl acrylate is used as an active diluent of the photocuring system. Adding isobornyl acrylate in the above-mentioned mass fraction range to the adhesive can better achieve subsequent UV curing while taking into account the adhesive strength, so that the tape can have an additional UV curing structure on the thermal curing structure. The addition of isobornyl acrylate can significantly improve the shear resistance of the tape.

[0031] Aliphatic polyurethane acrylate has good water resistance, heat resistance and weather resistance. Adding aliphatic polyurethane acrylate in the above-mentioned mass fraction to the adhesive can significantly improve the temperature resistance of the tape while taking into account the adhesive strength, and promote the subsequent UV curing effect, so that the tape can have an additional UV curing structure on the thermal curing structure. The addition of aliphatic polyurethane acrylate can significantly improve the temperature resistance and shear resistance of the tape.

[0032] The principle of using a defoamer to defoam a mixed solution is common sense, and its basic defoaming principle will not be described in detail. The defoamer in the present invention does not need to be particularly limited, and it can be either an oily defoamer or an aqueous defoamer. Adding the defoamer in the above range to the rubber material can significantly eliminate bubbles that may be generated during the preparation while taking into account the adhesive strength, thereby ensuring the stability of the final coating quality.

[0033] The use of ethyl acrylate, isobornyl acrylate, alkyl acrylate, aliphatic polyurethane acrylate, hydroxypropyl methacrylate and defoaming agent within this mass ratio range can not only ensure the effect of debonding by electricity, but also take into account the adhesive strength of the tape and improve the shear resistance. However, the present invention does not exclude situations outside the above mass ratio range, which will not affect the implementation of the solution.

[0034] Furthermore, ethyl acetate accounts for 2-8% of the mass of the rubber material, ethyl acrylate accounts for 20-28% of the mass of the rubber material, isobornyl acrylate accounts for 15-25% of the mass of the rubber material, alkyl acrylate accounts for 20-30% of the mass of the rubber material, aliphatic polyurethane acrylate accounts for 10-18% of the mass of the rubber material, hydroxypropyl methacrylate accounts for 1-8% of the mass of the rubber material, and defoamer accounts for 1-4% of the mass of the rubber material. Further limiting the components in the above rubber materials can make the production quality of the adhesive layer more controllable and ensure the quality stability of the adhesive layer.

[0035] Furthermore, in S1, the rubber material and the additive are mixed by stirring, and the stirring time is 30-120 minutes.

[0036] Further, the stirring speed is 500-2000 rpm, where the stirring speed refers to the speed of the stirrer in the stirring device. Further, the preferred stirring speed is 1300-1500 rpm, which can both improve the stirring efficiency and ensure the stirring effect.

[0037] Furthermore, the additives also include polyoxyethylene polyoxypropylene ether and / or propylene carbonate liquid and / or a leveling agent.

[0038] Adding polyoxyethylene polyoxypropylene ether can further improve the emulsification effect of the additive, improve the mixing effect of the additive and the rubber material, improve the stability of the final coating quality, and further increase the speed of electrical debonding.

[0039] Propylene carbonate liquid can improve the dissolution effect of additives and the molding effect of subsequent coatings, and can cooperate well with quaternary ammonium salt ionic liquids in additives without affecting the quaternary ammonium salt ionic liquids, thereby improving the conductive efficiency, and can significantly improve the effect of reducing the bonding strength by power-on, and can improve the reversibility of the power-on viscosity reduction and the repeated use effect of the tape.

[0040] The leveling agent can further improve the bubble elimination effect. The present invention does not need to make a special type limitation on the leveling agent. Adding the leveling agent to the rubber material can improve the molding effect of the subsequent coating together with the propylene carbonate liquid, thereby ensuring the stability of the final coating quality.

[0041] The mass of the polyoxyethylene polyoxypropylene ether is 2-5% of the mass of the rubber material.

[0042] The mass of the propylene carbonate liquid is 1-10% of the mass of the rubber material.

[0043] The mass of the leveling agent is 2-5% of the mass of the rubber material.

[0044] The use of polyoxyethylene polyoxypropylene ether, propylene carbonate liquid, and leveling agent within this mass ratio range can not only ensure the effect of power-on decompression, but also take into account the adhesive strength, and improve the molding effect of the coating and the final quality stability. However, the present invention does not exclude the situation where the content of the relevant components is outside the above mass ratio range, which does not affect the implementation of the solution.

[0045] Furthermore, in S2, the mixture is mixed with the thermal curing agent and the photocatalyst by stirring, the stirring time is 5-30 minutes, and the stirring speed is 1300-1500 rpm.

[0046] After stirring, you can observe the condition of the mixture. If there are still obvious bubbles, you can let it stand for a while and wait for the bubbles to be gradually removed before proceeding to the next steps.

[0047] Furthermore, the mass of the thermal curing agent is 0.2-2% of the mass of the adhesive, and the mass of the photocatalyst is 1-5% of the mass of the adhesive.

[0048] Furthermore, the thermal curing agent is isocyanate, and the photocatalyst is hydroxyl radical.

[0049] The use of the heat curing agent and the photocatalyst within this mass ratio range can ensure the effect of decompression by powering on and also take into account the adhesive strength. However, the present invention does not exclude the situation where the content of the relevant components is outside the above mass ratio range, which does not affect the implementation of the solution.

[0050] Furthermore, in S3, knife coating is used for coating. The specific coating thickness depends on the actual product specifications, for example, it can be 30-50 μm.

[0051] The implementation of the knife coating process itself is common sense. The specific principles and implementation thereof will not be elaborated in the present invention. The use of the knife coating method can better coat the mixture, especially the coating efficiency is higher for specific thickness requirements. However, the present invention does not exclude situations other than the knife coating method, which does not affect the implementation of the solution.

[0052] Furthermore, the conductive layer is a metal foil. Metal foil is a very thin metal sheet, which is generally manufactured by hammer forging or rolling. Metal foil is often made of materials with good ductility, such as aluminum, copper, tin and gold. For example, in consideration of cost, aluminum foil can be selected, but other metal foils are not excluded. Of course, a conductive layer of a certain form can also be used, which is not necessarily limited to metal foil, as long as it can meet the mechanical performance requirements of the actual product. Selecting other conductive layers does not affect the implementation of the solution.

[0053] Furthermore, in S4, heating and curing are performed at 77-135° C. The heating and curing temperature can take into account both heating efficiency and curing effect, but the present invention does not exclude situations outside the temperature range, which can also achieve the heating and curing process of the solution.

[0054] According to actual use requirements, a release layer may be provided on the adhesive layer after S5 , and the release layer may be, for example, a release film or a release paper.

[0055] According to actual use requirements, a PET insulating film may be provided outside the conductive layer after S5. On the other hand, the present invention provides a method for preparing an electrically conductive adhesive tape, comprising:

[0056] S1. Add additives to the rubber and mix the rubber and additives by stirring. The stirring time is 30-120 minutes and the stirring speed is 1300-1500 rpm.

[0057] The additives include quaternary ammonium salt ionic liquid, anionic emulsifier, polyoxyethylene polyoxypropylene ether, propylene carbonate liquid, and leveling agent, wherein the quaternary ammonium salt ionic liquid accounts for 15-30% of the mass of the rubber material, the mass of the anionic emulsifier accounts for 5-10% of the mass of the rubber material, wherein the mass ratio of the quaternary ammonium salt ionic liquid to the anionic emulsifier is (3-5):1, the mass of the polyoxyethylene polyoxypropylene ether accounts for 2-5% of the mass of the rubber material, the mass of the propylene carbonate liquid accounts for 1-10% of the mass of the rubber material, and the mass of the leveling agent accounts for 2-5% of the mass of the rubber material;

[0058] The rubber material comprises ethyl acetate, ethyl acrylate, isobornyl acrylate, alkyl acrylate, aliphatic polyurethane acrylate, hydroxypropyl methacrylate, and a defoamer, wherein ethyl acetate accounts for 4-8% of the mass of the rubber material, ethyl acrylate accounts for 20-28% of the mass of the rubber material, isobornyl acrylate accounts for 15-25% of the mass of the rubber material, alkyl acrylate accounts for 20-30% of the mass of the rubber material, aliphatic polyurethane acrylate accounts for 10-18% of the mass of the rubber material, hydroxypropyl methacrylate accounts for 1-8% of the mass of the rubber material, and the defoamer accounts for 1-2% of the mass of the rubber material;

[0059] S2, adding a heat curing agent and a photocatalyst to the mixture obtained in S1 and mixing the mixture with the heat curing agent and the photocatalyst by stirring, the stirring time is 5-30 minutes, the stirring speed is 1300-1500 rpm, and after stirring, the mixture is allowed to stand for 5-30 minutes;

[0060] The mass of the thermal curing agent is 0.2-2% of the mass of the rubber material, and the mass of the photocatalyst is 1-5% of the mass of the rubber material; the thermal curing agent is isocyanate, and the photocatalyst is hydroxyl radical;

[0061] S3, coating the mixture on the conductive layer by knife coating, wherein the conductive layer is aluminum foil;

[0062] S4, heat curing, the heating temperature is 77-135°C;

[0063] S5. UV curing.

[0064] Beneficial Effects

[0065] The technical solution provided by the present invention has the following beneficial effects: it can significantly improve the production efficiency of the electrically-assisted de-viscosity tape, improve the shear resistance, improve the peeling efficiency, and ensure that the performance of the tape remains stable after repeated use. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 The first production process diagram of the method for preparing the electrically-assisted de-viscosity tape is shown.

[0067] Figure 2 The second production process diagram of the method for preparing the electrically-assisted de-viscosity tape is shown in FIG. DETAILED DESCRIPTION

[0068] Since the relevant types of chemical materials and mixing equipment and coating equipment are already existing technologies, the embodiment section only describes some of the more relevant parameters. As for the properties of the relevant materials and other necessary operating specifications or the use and adjustment of relevant parameters, reference can be made to the general knowledge in the field and they will not be repeated in the embodiments.

[0069] Example 1

[0070] like Figure 1 The manufacturing process shown is a method for preparing an electrically conductive adhesive tape, comprising:

[0071] S1. Add additives to the rubber and mix them for later use.

[0072] The additives include quaternary ammonium salt ionic liquid and anionic emulsifier, wherein the quaternary ammonium salt ionic liquid accounts for 30% of the mass of the rubber material, and the mass of the anionic emulsifier accounts for 10% of the mass of the rubber material.

[0073] The rubber compound includes ethyl acetate, ethyl acrylate, isobornyl acrylate, alkyl acrylate, aliphatic polyurethane acrylate, hydroxypropyl methacrylate, and a defoaming agent, wherein ethyl acetate accounts for 5% of the mass of the rubber compound, ethyl acrylate accounts for 25% of the mass of the rubber compound, isobornyl acrylate accounts for 20% of the mass of the rubber compound, alkyl acrylate accounts for 30% of the mass of the rubber compound, aliphatic polyurethane acrylate accounts for 10% of the mass of the rubber compound, hydroxypropyl methacrylate accounts for 8% of the mass of the rubber compound, and the defoaming agent accounts for 2% of the mass of the rubber compound.

[0074] Use a stirrer to stir for 60 minutes at a speed of 1500 rpm. The stirring time can be increased or decreased if necessary according to the actual mixing situation.

[0075] S2, add a heat curing agent and a photocatalyst to the mixture obtained in S1 and mix them for later use

[0076] The thermal curing agent is isocyanate, the photocatalyst is hydroxyl radical, the mass of the thermal curing agent is 2% of the mass of the rubber material, and the mass of the photocatalyst is 5% of the mass of the rubber material.

[0077] Use a stirrer to stir for 10 minutes at a speed of 1500 rpm. The stirring time can be increased or decreased if necessary according to the actual mixing situation.

[0078] After stirring, you can observe the condition of the mixture. If there are still obvious bubbles, you can let it stand for a while and wait for the bubbles to be gradually removed before proceeding to the next steps.

[0079] S3, coating the S2 mixture on aluminum foil by knife coating, with a coating thickness of 45 μm;

[0080] S4, heating and curing;

[0081] Use baking equipment (such as tunnel drying machine) for heating and curing, the heating temperature is 120℃, the heating time is 3min, pay attention to observe the heating effect during heating, and increase or decrease the heating time according to the actual situation.

[0082] S5. Perform UV curing.

[0083] The coating layer is irradiated using a UV light irradiation device to achieve UV curing.

[0084] Carry out product performance testing, including test equipment and basic requirements:

[0085] 1. Peeling equipment: computer peeling tester

[0086] 2. Sample size: 250mm×25mm

[0087] 3. Electrolysis equipment: DC regulated power supply input voltage 9V current 0.1A

[0088] The test method:

[0089] 1. Make the test sample by sticking the electrolytic adhesive on the aluminum foil, where the coating is 45μm

[0090] 2. The sample is attached to the steel plate with a 180° fixed fixture

[0091] The specific parameters are as follows:

[0092]

[0093] Wherein gf is the abbreviation of "gram-force", which means the gravity exerted on a 1-gram object under standard gravity. In the present invention, gf represents the peeling force.

[0094] Example 2

[0095] Compared with Example 1, the mass of the quaternary ammonium salt ionic liquid is 10% of the mass of the rubber material, and the mass of the anionic emulsifier is 3% of the mass of the rubber material.

[0096] The experiment found that compared with Example 1, there is no effect on the subsequent preparation steps, only the rate of decrease of the peeling force of the finished tape after power is applied is slightly slower, that is, the peeling force decrease process requires power application for a longer time, and has no effect on the shear force.

[0097] Example 3

[0098] Compared with Example 1, in the rubber compound, ethyl acetate accounts for 10% of the mass of the rubber compound, ethyl acrylate accounts for 20% of the mass of the rubber compound, isobornyl acrylate accounts for 30% of the mass of the rubber compound, alkyl acrylate accounts for 20% of the mass of the rubber compound, aliphatic polyurethane acrylate accounts for 10% of the mass of the rubber compound, hydroxypropyl methacrylate accounts for 9% of the mass of the rubber compound, and the defoaming agent accounts for 1% of the mass of the rubber compound.

[0099] The experiment found that, compared with Example 1, only the consistency of the mixture obtained in S1 changed, which had no effect on the subsequent preparation steps and the decreasing speed of the peeling force and the shear force of the finished tape after power was applied.

[0100] Example 4

[0101] Compared with Example 1, ethyl acetate accounts for 1% of the mass of the rubber material, ethyl acrylate in the rubber material accounts for 30% of the mass of the rubber material, isobornyl acrylate accounts for 10% of the mass of the rubber material, alkyl acrylate accounts for 35% of the mass of the rubber material, aliphatic polyurethane acrylate accounts for 20% of the mass of the rubber material, hydroxypropyl methacrylate accounts for 1% of the mass of the rubber material, and defoamer accounts for 3% of the mass of the rubber material. It is found through experiments that compared with Example 1, only the consistency of the mixture obtained in S1 changes, which has no effect on the subsequent preparation steps, and has no effect on the decreasing speed of the peeling force and the shear force of the finished tape after power is applied.

[0102] Example 5

[0103] Compared with Example 1, the additive also includes polyoxyethylene polyoxypropylene ether, the mass of which is 5% of the mass of the rubber compound; the additive also includes propylene carbonate liquid, the mass of which is 10% of the mass of the rubber compound; the additive also includes a leveling agent, the mass of which is 5% of the mass of the rubber compound.

[0104] The test found that, compared with Example 1, the molding effect of the coating was improved, the subsequent preparation steps were not affected, and the decreasing speed of the peeling force and the shear force of the finished tape after power was applied were not affected.

[0105] Example 6

[0106] Compared with Example 1, the additive also includes polyoxyethylene polyoxypropylene ether, the mass of which is 2% of the mass of the rubber compound; the additive also includes propylene carbonate liquid, the mass of which is 1% of the mass of the rubber compound; the additive also includes a leveling agent, the mass of which is 2% of the mass of the rubber compound.

[0107] The test found that, compared with Example 1, the molding effect of the coating was improved, the subsequent preparation steps were not affected, and the decreasing speed of the peeling force and the shear force of the finished tape after power was applied were not affected.

[0108] Example 7

[0109] Compared with Example 1, the mass of the thermal curing agent is 0.2% of the mass of the adhesive, and the mass of the photocatalyst is 1% of the mass of the adhesive.

[0110] The experiment found that compared with Example 1, only the speed of thermal curing and UV curing was slowed down, which had no effect on the subsequent preparation steps and the decreasing speed of the peeling force and the shear force of the finished tape after power was applied.

[0111] Example 8

[0112] Compared with Example 1, the coating layer was heated and cured using a baking device, and the heating temperature was adjusted to 77°C.

[0113] The experiment found that, compared with Example 1, only the heating and curing time was increased, which had no effect on the subsequent preparation steps and had no effect on the decreasing speed of the peeling force and the shear force of the finished tape after power was applied.

[0114] Example 9

[0115] Compared with Example 1, the coating layer was heated and cured using a baking device, and the heating temperature was adjusted to 135°C.

[0116] It was found through experiments that, compared with Example 1, only the heating and curing time was reduced, which had no effect on the subsequent preparation steps and the decreasing speed of the peeling force and the shear force of the finished tape after power was applied.

[0117] Example 10

[0118] like Figure 2 The manufacturing process shown is a method for preparing an electrically conductive adhesive tape, comprising:

[0119] S1. Add additives to the rubber and mix the rubber and additives by stirring. The stirring time is 60 minutes and the stirring speed is 1500 rpm.

[0120] Depending on the actual mixing situation, the stirring time can be increased or decreased if necessary.

[0121] The additives include quaternary ammonium salt ionic liquid, anionic emulsifier, polyoxyethylene polyoxypropylene ether, propylene carbonate liquid, and leveling agent, wherein the quaternary ammonium salt ionic liquid accounts for 30% of the mass of the rubber, the mass of the anionic emulsifier accounts for 10% of the mass of the rubber, the mass of the polyoxyethylene polyoxypropylene ether accounts for 5% of the mass of the rubber, the mass of the propylene carbonate liquid accounts for 10% of the mass of the rubber, and the mass of the leveling agent accounts for 5% of the mass of the rubber;

[0122] The rubber material comprises ethyl acetate, ethyl acrylate, isobornyl acrylate, alkyl acrylate, aliphatic polyurethane acrylate, hydroxypropyl methacrylate, and a defoamer, wherein ethyl acetate accounts for 8% of the mass of the rubber material, ethyl acrylate accounts for 25% of the mass of the rubber material, isobornyl acrylate accounts for 20% of the mass of the rubber material, alkyl acrylate accounts for 25% of the mass of the rubber material, aliphatic polyurethane acrylate accounts for 15% of the mass of the rubber material, hydroxypropyl methacrylate accounts for 5% of the mass of the rubber material, and the defoamer accounts for 2% of the mass of the rubber material;

[0123] S2. Add a thermosetting agent and a photocatalyst to the mixture obtained in S1 and mix the mixture with the thermosetting agent and the photocatalyst by stirring. The stirring time is 30 minutes and the stirring speed is 1500 rpm. After stirring, the mixture is allowed to stand for 30 minutes. The condition of the mixture can be observed and the standing time can be appropriately extended before proceeding to the subsequent steps.

[0124] The mass of the thermal curing agent is 2% of the mass of the rubber material, and the mass of the photocatalyst is 5% of the mass of the rubber material; the thermal curing agent is isocyanate, and the photocatalyst is hydroxyl radical;

[0125] S3, coating the mixture on the conductive layer by knife coating, wherein the conductive layer is aluminum foil with a coating thickness of 45 μm;

[0126] S4, heating and curing;

[0127] Use baking equipment (such as tunnel drying machine) for heating and curing, the heating temperature is 120℃, the heating time is 3min, pay attention to observe the heating effect during heating, and increase or decrease the heating time according to the actual situation.

[0128] S5. UV curing.

[0129] The coating layer is irradiated using a UV light irradiation device to achieve UV curing.

[0130] The experiment found that, compared with Example 1, the molding effect of the coating was significantly improved, and there was no effect on the subsequent preparation steps, and no effect on the decreasing speed of the peeling force and the shear force of the finished tape after power was applied.

[0131] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing an electrically conductive adhesive tape, comprising: S1. Adding additives to the rubber material and mixing them, wherein the additives include quaternary ammonium salt ionic liquid and anionic emulsifier, and the rubber material includes ethyl acetate; S2, adding a thermal curing agent and a photocatalyst to the mixture obtained in S1 and mixing; S3, coating the mixture on the conductive layer; S4, heating and curing; S5. UV curing.

2. The preparation method according to claim 1, characterized in that: The mass of the quaternary ammonium salt ionic liquid is 10-30% of the mass of the rubber material, and the mass of the anionic emulsifier is 3-10% of the mass of the rubber material.

3. The preparation method according to claim 2, characterized in that: The mass ratio of the quaternary ammonium salt ionic liquid to the anionic emulsifier is (3-5):

1.

4. The preparation method according to claim 1, characterized in that: Ethyl acetate accounts for 1-10% of the mass of the rubber material.

5. The preparation method according to claim 4, characterized in that: The rubber compound further comprises: ethyl acrylate, isobornyl acrylate, alkyl acrylate, aliphatic polyurethane acrylate, hydroxypropyl methacrylate, and a defoaming agent, wherein: ethyl acrylate accounts for 15-30% of the mass of the rubber compound, isobornyl acrylate accounts for 10-30% of the mass of the rubber compound, alkyl acrylate accounts for 20-35% of the mass of the rubber compound, aliphatic polyurethane acrylate accounts for 10-20% of the mass of the rubber compound, hydroxypropyl methacrylate accounts for 1-10% of the mass of the rubber compound, and the defoaming agent accounts for 1-4% of the mass of the rubber compound.

6. The preparation method according to claim 5, characterized in that: in: Ethyl acetate accounts for 2-8% of the mass of the rubber material, ethyl acrylate accounts for 20-28% of the mass of the rubber material, isobornyl acrylate accounts for 15-25% of the mass of the rubber material, alkyl acrylate accounts for 20-30% of the mass of the rubber material, aliphatic polyurethane acrylate accounts for 10-18% of the mass of the rubber material, hydroxypropyl methacrylate accounts for 1-8% of the mass of the rubber material, and the defoamer accounts for 1-4% of the mass of the rubber material.

7. The preparation method according to claim 1, characterized in that: In S1, the rubber material and the additive are mixed by stirring, and the stirring time is 30-120 minutes.

8. The preparation method according to claim 7, characterized in that: The stirring speed is 500-2000rpm.

9. The preparation method according to claim 8, characterized in that: The stirring speed is 1300-1500rpm.

10. The preparation method according to claim 1, characterized in that: The additives also include polyoxyethylene polyoxypropylene ether.

11. The preparation method according to claim 10, characterized in that: The mass of the polyoxyethylene polyoxypropylene ether is 2-5% of the mass of the rubber material.

12. The preparation method according to claim 1, characterized in that: The additive also includes propylene carbonate liquid.

13. The preparation method according to claim 12, characterized in that: The mass of the propylene carbonate liquid is 1-10% of the mass of the rubber material.

14. The preparation method according to claim 1, characterized in that: The additives also include leveling agents.

15. The preparation method according to claim 14, characterized in that: The mass of the leveling agent is 2-5% of the mass of the rubber material.

16. The preparation method according to claim 1, characterized in that: In S2, the mixture is mixed with the thermal curing agent and the photocatalyst by stirring, the stirring time is 5-30 minutes, and the stirring speed is 1300-1500 rpm.

17. The preparation method according to claim 1, characterized in that: The mass of the thermal curing agent is 0.2-2% of the mass of the rubber material, and the mass of the photocatalyst is 1-5% of the mass of the rubber material.

18. The preparation method according to claim 1, characterized in that: The thermal curing agent is isocyanate, and the photocatalyst is hydroxyl radical.

19. The preparation method according to claim 1, characterized in that: In S3, knife coating is used for coating.

20. The preparation method according to claim 1, characterized in that: The conductive layer is a metal foil.

21. The preparation method according to claim 1, characterized in that: In S4, heat curing is performed at 77-135°C.

22. A method for preparing an electrically conductive adhesive tape, comprising: S1. Add additives to the rubber and mix the rubber and additives by stirring. The stirring time is 30-120 minutes and the stirring speed is 1300-1500 rpm. The additives include quaternary ammonium salt ionic liquid, anionic emulsifier, polyoxyethylene polyoxypropylene ether, propylene carbonate liquid, and leveling agent. The quaternary ammonium salt ionic liquid accounts for 15-30% of the mass of the rubber material, and the mass of the anionic emulsifier accounts for 5-10% of the mass of the rubber material. The mass ratio of the quaternary ammonium salt ionic liquid to the anionic emulsifier is (3-5):

1. The mass of the polyoxyethylene polyoxypropylene ether accounts for 2-5% of the mass of the rubber material, the mass of the propylene carbonate liquid accounts for 1-10% of the mass of the rubber material, and the mass of the leveling agent accounts for 2-5% of the mass of the rubber material. The rubber material comprises ethyl acetate, ethyl acrylate, isobornyl acrylate, alkyl acrylate, aliphatic polyurethane acrylate, hydroxypropyl methacrylate, and a defoamer, wherein ethyl acetate accounts for 4-8% of the mass of the rubber material, ethyl acrylate accounts for 20-28% of the mass of the rubber material, isobornyl acrylate accounts for 15-25% of the mass of the rubber material, alkyl acrylate accounts for 20-30% of the mass of the rubber material, aliphatic polyurethane acrylate accounts for 10-18% of the mass of the rubber material, hydroxypropyl methacrylate accounts for 1-8% of the mass of the rubber material, and the defoamer accounts for 1-2% of the mass of the rubber material; S2, adding a heat curing agent and a photocatalyst to the mixture obtained in S1 and mixing the mixture with the heat curing agent and the photocatalyst by stirring, the stirring time is 5-30 minutes, the stirring speed is 1300-1500 rpm, and after stirring, the mixture is allowed to stand for 5-30 minutes. The mass of the thermal curing agent is 0.2-2% of the mass of the rubber material, the mass of the photocatalyst is 1-5% of the mass of the rubber material, the thermal curing agent is isocyanate, and the photocatalyst is hydroxyl radical; S3, coating the mixture on the conductive layer by knife coating, wherein the conductive layer is aluminum foil; S4, heat curing, the heating temperature is 77-135°C; S5. UV curing.

Images