Environment-friendly electric viscosity-reducing adhesive tape with long cycle service life and preparation method of environment-friendly electric viscosity-reducing adhesive tape

Abstract

The invention relates to the field of electric viscosity-reducing adhesive tapes, in particular to an environment-friendly electric viscosity-reducing adhesive tape with a long cycle service life and a preparation method of the environment-friendly electric viscosity-reducing adhesive tape. The invention discloses an environment-friendly electric viscosity-reducing adhesive tape with long cycle service life. The environment-friendly electric viscosity-reducing adhesive tape comprises an electric viscosity-reducing adhesive layer and release film layers, wherein the release film layers are coated on two sides of the electric viscosity-reducing adhesive layer; the electric visbreaking adhesive layer comprises the following substances in parts by weight: 90-110 parts of a pressure-sensitive adhesive; 1-4 parts of a curing agent; 5-10 parts of an ionic polymer; the ionic polymer comprises anion and cation salts modified by organic segments. The pressure-sensitive adhesive in the electric visbreaking adhesive layer serves as a main body to provide basic adhesive performance, and the ionic polymer modified by the organic segment is cross-linked with the pressure-sensitive adhesive through the curing agent to form a net structure. The crosslinking effect can limit small molecule precipitation of the ionic polymer, and performance degradation caused by ion migration of a traditional electric viscosity-reducing adhesive tape is avoided. The problem that in the prior art, the performance is degraded when an adhesive tape is repeatedly used is solved, and the repeated use requirement can be met without replacement.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electrically debondable adhesive tape, in particular to a high-cycle-life environmentally friendly electrically debondable adhesive tape and a preparation method thereof. BACKGROUND

[0002] The electrically debondable adhesive tape is a functional adhesive tape for regulating adhesion by electrical stimulation. The core principle is that, under the condition of power on, the adhesive layer has a significant reduction in adhesion due to the change in the structure of ionic polymers, thereby achieving rapid peeling from the adherend. After power off, the adhesion can be restored to the initial state, which is suitable for temporary fixing of parts in the fields of consumer electronics and automobile manufacturing, and particularly meets the needs of non-destructive disassembly and reuse in the process of high-precision assembly. With the development of electronic devices towards miniaturization and integration, higher requirements are put forward for the cycle performance, environmental adaptability and cost control of the electrically debondable adhesive tape.

[0003] In view of the above prior art, the inventors found that the preparation process of the existing electrically debondable adhesive tape relies on traditional adhesive formulations and conventional coating and curing processes, which mainly focuses on the initial adhesion and electrical response speed, but lacks regulation of long-term cycle stability. The cycle life of the electrically debondable adhesive tape is limited mainly due to two aspects: firstly, the ionic polymer is usually a small molecule salt without modification, which is easy to precipitate from the adhesive matrix during repeated power-on and power-off cycles, resulting in the destruction of the conductive network and the decrease of the adhesion recovery rate; secondly, the crosslinking degree of the curing agent and the adhesive is insufficient, and the network structure is easy to degrade under high temperature and high humidity, resulting in problems such as adhesion decay and unstable peeling strength after multiple uses. In addition, the interfacial bonding force between the conductive substrate and the adhesive layer is weak, and delamination is easy to occur after long-term use, further shortening the effective cycle number of the product. SUMMARY

[0004] Based on the technical problems existing in the above prior art, the present application provides a high-cycle-life environmentally friendly electrically debondable adhesive tape and a preparation method thereof.

[0005] In a first aspect, the present application provides a high-cycle-life environmentally friendly electrically debondable adhesive tape, which adopts the following technical solution: A high-cycle-life environmentally friendly electrically debondable adhesive tape, comprising an electrically debondable adhesive layer and release film layers coated on both sides of the electrically debondable adhesive layer; the electrically debondable adhesive layer comprises the following substances by weight: 90-110 parts of pressure-sensitive adhesive; 1-4 parts of curing agent; 5-10 parts of ionic polymer; the ionic polymer comprises anionic and cationic salt modified by an organic segment.

[0006] Through the technical scheme, the application provides the basic bonding performance by taking the pressure-sensitive adhesive in the electrically-reduced adhesive layer as the main body, and the ionomer modified by the organic section forms a network structure by cross-linking with the pressure-sensitive adhesive through the curing agent. The cross-linking effect can limit the small molecules of the ionomer to be separated out, and avoid the performance attenuation of the traditional electrically-reduced adhesive tape due to ion migration. At the same time, the ionomer can be directionally migrated under the action of the electric field, the adhesion is reduced by the interface electronic layer, and the adhesion is restored after the power is off. The performance attenuation problem of the adhesive tape in repeated use in the prior art is solved, the multiple use requirements can be met without replacement, the cycle use efficiency is improved, and the cost caused by frequent replacement is reduced.

[0007] Further, the pressure-sensitive adhesive includes at least one of a solvent type acrylate adhesive, a water-based acrylate adhesive, a polyurethane adhesive, a silicone adhesive, or a rubber adhesive.

[0008] Through the technical scheme, the application selects the solvent type acrylate, the water-based acrylate, the polyurethane, and the like adhesive. The pressure-sensitive adhesive of these types contains active reaction groups such as hydroxyl and carboxyl on the molecular chain, can chemically react with the modified organic section of the ionomer and the curing agent, and ensures the formation of the cross-linking network. At the same time, different types of pressure-sensitive adhesives can adjust the basic performance of the adhesive tape such as the initial adhesion, flexibility, and temperature resistance according to the application scene. The acrylate adhesive has good bonding strength and weather resistance, and the polyurethane adhesive has excellent elasticity and impact resistance. The scheme ensures the compatibility of the electrically-reduced adhesive layer and other components, provides a stable basis for the subsequent cross-linking reaction and electric response performance, and enables the adhesive tape to stably play the bonding and reduced adhesion functions in different use environments.

[0009] Further, the curing agent includes at least one of an isocyanate curing agent, an epoxy curing agent, or a nitrogen propylene curing agent.

[0010] Through the technical scheme, the application selects the active groups in the isocyanate, epoxy, or nitrogen propylene curing agent molecule to cross-link with the active groups of the pressure-sensitive adhesive and the modified organic section of the ionomer, and connects the linear adhesive molecular chain and the ionomer into a three-dimensional network structure. The cross-linking effect can enhance the cohesive strength of the adhesive layer, reduce the migration and separation of small molecules, and avoid the deformation or damage of the adhesive layer in the stress or high-temperature environment. The structural stability and durability of the electrically-reduced adhesive tape are significantly improved, the damage or adhesion attenuation of the adhesive layer caused by insufficient cohesive strength in multiple cycle uses is avoided, and the reversibility and long-term stability of the reduced adhesion-restored process are ensured.

[0011] Further, the ionomer includes at least one of a modified ammonium salt, a modified lithium salt, a modified sulfonic acid salt, or a modified phosphonic acid salt.

[0012] By the above technical solution, the type of the ionomer is limited, the modified ammonium salt, lithium salt, sulfonate or phosphonate is used, the reactivity group is given to the ionomer by modifying the organic segment, the ionomer can react with the curing agent and the pressure sensitive adhesive to crosslink, and the ionicity is retained. When electricity is applied, the anions and cations in the ionomer migrate directionally under the action of the electric field, an electron layer is formed at the interface between the adhesive and the adherend to block the adhesion force generated by the hydrogen bond, and the adhesion force is reduced quickly; after the electricity is turned off, the electrons dissipate gradually, and the anions return to the random distribution state, and the adhesion force is restored. The modified ionomer is not easy to separate from the adhesive matrix due to the crosslinking fixation. The efficient reversible electric adhesion reduction performance is realized, and the performance decay problem caused by the easy migration of the traditional ion salt is solved, and the cycle life and environmental adaptability of the adhesive tape are improved.

[0013] Further, the high cycle life type environment-friendly electric adhesion reduction adhesive tape further comprises: A conductive substrate is arranged between the electric adhesion reduction adhesive layer and the release film layer on one side, and the conductive substrate comprises any one of an aluminum foil substrate, a copper foil substrate or a metal fiber cloth substrate.

[0014] An adhesive is arranged on the side of the conductive substrate away from the electric adhesion reduction adhesive layer and bonded to the release film layer on one side.

[0015] By the above technical solution, the conductive substrate and the adhesive layer are added to realize the function expansion. The conductive substrate such as the aluminum foil, the copper foil or the metal fiber cloth is arranged between the electric adhesion reduction adhesive layer and the release film to provide a stable conductive path for the electric adhesion reduction process, to ensure that the voltage is uniformly applied to the adhesive layer, to promote the directional migration of the ions and the adhesion reduction reaction, and to avoid the incomplete local adhesion reduction. Meanwhile, the adhesive layer is arranged on the other side of the conductive substrate, the type of the adhesive can be adjusted according to the material of the adherend and the bonding requirement, and the composite structure of the release film-adhesive-conductive substrate-electric adhesion reduction adhesive-release film is formed. The response speed and uniformity of the electric adhesion reduction are improved, the introduction of the adhesive layer expands the application scenarios of the adhesive tape, the fixing requirement of the adhesive tape for different materials of the adherend is met, and the practicality and compatibility of the adhesive tape are enhanced.

[0016] Further, the adhesive comprises any one of an epoxy resin adhesive, a phenolic resin adhesive, a urea-formaldehyde resin adhesive or a polyurethane adhesive.

[0017] By the technical scheme, the epoxy resin, the phenolic resin, the urea-formaldehyde resin or the polyurethane adhesive is selected, the adhesives have high bonding strength, heat resistance and chemical stability, active groups in the molecular structure can be chemically bonded or physically adsorbed with polar groups on the surface of the conductive substrate, and the interface bonding force is improved. Meanwhile, the cohesive strength of the adhesive layer formed after curing of the adhesives is high, and the adhesive layer is not easy to crack or fall off in the recycling process. Effectively, the scheme ensures the bonding stability between the conductive substrate and the adhesive layer and the release film, and the adhesive tape is not easy to delaminate in the recycling process and in a high-temperature and high-humidity environment, so that the integrity of the overall structure of the adhesive tape and the long-term use reliability are ensured.

[0018] In a second aspect, the application provides a preparation method of an environmentally friendly electric anti-adhesion adhesive tape with long recycling life, which adopts the following technical scheme: A preparation method of an environmentally friendly electric anti-adhesion adhesive tape with long recycling life includes the following preparation steps: The pressure-sensitive adhesive, the curing agent, the ionic polymer and the solvent are stirred and mixed to obtain an electric anti-adhesion adhesive. A release film is selected, and the electric anti-adhesion adhesive is coated on one side of the release film, and the release film coated with the electric anti-adhesion adhesive layer is obtained after drying and curing treatment. Then, the conductive substrate is laminated with the electric anti-adhesion adhesive layer of the release film coated with the electric anti-adhesion adhesive layer, and the other side of the conductive substrate is coated with the adhesive and the release film, so that the electric anti-adhesion adhesive tape is prepared.

[0019] By the technical scheme, the pressure-sensitive adhesive, the curing agent, the ionic polymer and the solvent are stirred and mixed to ensure uniform dispersion of the components and avoid uneven performance caused by excessive local concentration. After being coated on the release film, the solvent is removed by drying to prevent the solvent from affecting the denseness of the adhesive layer. The curing treatment promotes the cross-linking reaction to proceed fully and forms a stable network structure. The conductive substrate and the adhesive layer are laminated in layers to ensure that there is no air bubble between the layers and the layers are tightly combined. The steps work together to control the thickness and uniformity of the adhesive layer and ensure the consistency of the performance of the products in batch production. The standardized production of the electric anti-adhesion adhesive tape is realized, and sufficient cross-linking and uniform distribution of the components make the adhesive tape have good electrical response performance and recycling stability, which meets the design goal of long recycling life.

[0020] Further, the drying and curing treatment is drying treatment at 110-130℃, and then curing at 45-55℃ for 40-60h.

[0021] By the technical scheme, the application optimizes the drying and curing treatment conditions, the drying treatment at 110-130 DEG C can quickly evaporate the solvent, avoiding the residue of the solvent to cause blistering or decrease of the cohesive strength of the adhesive layer; the curing at 45-55 DEG C for 40-60 hours provides a suitable temperature for the cross-linking reaction, so that the reaction of the curing agent with the pressure-sensitive adhesive and the ionic polymer is fully carried out, ensuring that a cross-linking network with sufficient density is formed. The medium-temperature long-time curing can avoid the molecular chain rupture or decomposition of the ionic polymer caused by high temperature, ensuring the integrity of the cross-linking structure. The scheme ensures that the adhesive layer is completely dried, the cross-linking degree is high, and the cohesive strength and heat resistance are significantly improved, so that the adhesive tape can still maintain stable bonding performance and electric adhesion reduction effect under multiple cycles of use and harsh environment, prolonging its service life.

[0022] In summary, the application has the following beneficial effects: First, the application greatly prolongs the number of cycles of use of the electric adhesion reduction tape through multiple material design and structure optimization. The core lies in that an anion-cation salt modified by an organic segment is used as an ionic polymer, which can react with a pressure-sensitive adhesive and a curing agent to form a stable three-dimensional network structure, effectively limiting ion migration and small molecule precipitation, and avoiding the attenuation of the electric response performance of the traditional adhesive tape caused by ion loss. At the same time, the cross-linking of the curing agent and the pressure-sensitive adhesive enhances the cohesive strength of the adhesive layer, reduces the damage or adhesion degradation of the adhesive layer during the cycle of use, and ensures the reversibility and long-term stability of the adhesion reduction-recovery process. In addition, the close combination of the conductive substrate and the adhesive layer avoids interface delamination, further ensuring the structural integrity after multiple uses, and finally realizing the performance consistency of the adhesive tape in long-term cycles.

[0023] Second, the application simultaneously improves the electric response speed and overall structural reliability of the electric adhesion reduction tape through material selection and composite structure design. On the one hand, the ionic polymer is selected from modified ammonium salt, lithium salt and the like, which retains high ion conductivity while realizing chemical anchoring with the adhesive matrix through organic segment modification, ensuring the directional migration efficiency of ions when powered on, quickly forming an electronic barrier layer at the interface to realize precise regulation of adhesion; after power off, the ions can quickly return to the initial state to ensure the timeliness of adhesion recovery. On the other hand, the introduction of the conductive substrate (such as aluminum foil and copper foil) constructs a uniform conductive path, avoiding incomplete adhesion reduction caused by uneven local electric field distribution; the adhesive layer is selected from high-strength adhesives such as epoxy resin and polyurethane, which strengthens the interfacial bonding force between the conductive substrate and the adhesive layer, and still resists deformation and delamination in high-temperature and high-humidity environments, ensuring the structural stability of the adhesive tape under complex working conditions.

[0024] Third, the present application improves the environmental adaptability and industrial production feasibility of the electro-debonding adhesive tape through flexible material combination and standardized process design. In terms of material, the pressure-sensitive adhesive covers various types such as solvent type and water-based acrylate, and the viscosity and flexibility can be adjusted according to the material of the adherend; the adhesive layer is selected from epoxy resin and phenolic resin, etc., to meet the requirements of different scenarios for bonding strength and weather resistance, so that the adhesive tape is suitable for various fields such as consumer electronics assembly and automobile part fixing. In terms of process, the process design of step-by-step coating and drying and curing ensures uniform dispersion of each component, and long-term curing at medium temperature promotes sufficient cross-linking reaction, avoids material degradation caused by high temperature, and ensures the consistency of product performance in batch production. In addition, the design of release film and multi-layer composite structure simplifies the use process, improves the operation convenience, and further widens the application scenarios of the adhesive tape. DETAILED DESCRIPTION

[0025] The present application will be further described in detail below in conjunction with the examples. Example

[0026] First, accurately weigh 450 g of butyl acrylate, 300 g of methyl methacrylate, 50 g of hydroxyethyl acrylate, 30 g of acrylonitrile, and 20 g of acrylic acid as monomers, and 600 g of ethyl acetate as a solvent, mix them uniformly, and then add them to a reaction kettle. Then, nitrogen is introduced for 1 h to exclude oxygen, and the reaction system is heated to 70°C. Next, weigh 2 g of azobisisobutyronitrile (AIBN), dissolve it in 50 g of ethyl acetate, and then add the solution to the reaction kettle, and keep the reaction at 70°C for 4 h. Then, weigh 4 g of AIBN again, dissolve it in 200 g of ethyl acetate, and add it dropwise to the reaction system, ensuring that it is added dropwise within 20 minutes. During this period, the reaction temperature is raised to 80°C, and the reaction is carried out under reflux for 4 h. Finally, when the polymerization reaction is completed, the reaction system is cooled to room temperature, 25.5 g of pyridinium hydroxypropane sulfonate is added, stirred uniformly, and an appropriate amount of benzotriazole is added to adjust the pH value to 7-8, to prepare a modified acrylic adhesive.

[0027] Weigh 100 g of the above-mentioned modified acrylate adhesive, 3 g of isocyanate curing agent, 1 g of aziridine, 7 g of modified ammonium fluorinated sulfonate, and 35 g of solvent ethyl acetate, mix and stir at high speed until uniform, coat the electro-debonding adhesive on the release surface of a release film, place it in a 120°C oven, dry it, then paste it on the release surface of another release film, place it in a 50°C oven for curing for 48 h, and obtain an electrolytic adhesive film.

[0028] The electrolytic adhesive film is adhered to one side of an aluminum foil and the release surface of release film 1, respectively, and a general adhesive with release film 2 is adhered to the other side of the aluminum foil, to obtain an electrolytic adhesive tape. Example

[0029] First, accurately weigh 350 g of butyl acrylate, 250 g of methyl methacrylate, 30 g of hydroxyethyl acrylate, 20 g of glycidyl acrylate, and 50 g of acrylic acid, mix them uniformly, then add 10 g of sodium dodecyl sulfate and 600 g of pure water, and stir at a high speed of 1500 r / min until a uniform emulsion is obtained. Subsequently, nitrogen is passed for 1 h to remove oxygen, and the reaction system is warmed to 80℃, 5 g of ammonium persulfate is added, and the reaction is maintained for 6 h. When the polymerization reaction is completed, the reaction system is cooled to 40℃, 21 g of pyridinium hydroxypropanesulfonate is added, stirred uniformly, and the pH value is adjusted to 7.5-8.5 by adding an appropriate amount of ammonia water. After cooling to room temperature, 30 g of propylene glycol methyl ether acetate and 150 g of pure water are added to prepare a modified water-based acrylic adhesive.

[0030] Weigh 100 g of the modified water-based acrylic adhesive, 1 g of the capped water-based isocyanate curing agent, 7 g of the modified fluorinated ammonium sulfonate salt, 5 g of ethyl cellulose, 0.5 g of BYK dispersant, 10 g of solvent ethylene glycol, mix and stir at a high speed until uniform, coat the electro-reduced adhesive on the release surface of a release film, place it in a 120℃ oven, dry, then adhere to the release surface of another release film, place it in a 50℃ oven for 2 days to cure, and obtain an electrolytic adhesive film.

[0031] The electrolytic adhesive film is adhered to one side of the aluminum foil and the release surface of the release film 1, and the ordinary adhesive with the release film 2 is adhered to the other side of the aluminum foil to obtain an electrolytic adhesive tape.

[0032] Comparative Example: Weigh 100 g of the acrylic adhesive, 1.5 g of the isocyanate curing agent, 7 g of the trifluorosulfonate salt, 35 g of the solvent ethyl acetate, mix and stir at a high speed until uniform, coat the electro-reduced adhesive on the release surface of a release film, place it in a 120℃ oven, dry, then adhere to the release surface of another release film, place it in a 50℃ oven for 2 days to cure, and obtain an electrolytic adhesive film.

[0033] The electrolytic adhesive film is adhered to one side of the aluminum foil and the release surface of the release film 1, and the ordinary adhesive with the release film 2 is adhered to the other side of the aluminum foil to obtain an electrolytic adhesive tape.

[0034] The adhesive tape prepared by the above scheme is tested for performance, and the test contents are as follows Adhesion force (gf / 25mm) before electrification at room temperature: the sample size of the electrolytic adhesive film is 25mm×100mm, the thickness is 60μm, and the aluminum foil with a thickness of 50μm is attached to the back of the sample. A 2kg roller is rolled back and forth 3 times at a speed of 300mm / s, and the placement environment is room temperature and ambient humidity. After 20min, the 180° adhesion force is tested on a tensile testing machine.

[0035] Adhesion force after power supply at room temperature (gf / 25mm): The sample of the electrolytic adhesive film was 25mm x 100mm in size and 60μm in thickness, and an aluminum foil of 50μm in thickness was attached to the back of the sample. The sample was attached to a stainless steel plate. A 2kg roller was rolled back and forth three times at a speed of 300mm / s, and the sample was left to stand at room temperature and ambient humidity. After 20 minutes, the positive electrode of a direct current power supply was connected to the conductive substrate, and the negative electrode was connected to the stainless steel plate. A direct current of 9V was supplied for 30 seconds, and the adhesion force was measured on a tensile tester immediately after the power supply was completed.

[0036] Multiple adhesion force recovery rate (%): After the test of the adhesion force after power supply at room temperature was completed, the electrolytic adhesive film was peeled off from the stainless steel plate 1, 3, 5, 10, and 15 times, and then attached to the stainless steel plate again. A 2kg roller was rolled back and forth three times at a speed of 120mm / s, and the sample was left to stand at room temperature and ambient humidity. After 30 minutes, the adhesion force at room temperature was measured again on a tensile tester, and the multiple adhesion force recovery rate was calculated by dividing the adhesion force at room temperature by the adhesion force after power supply at room temperature.

[0037] Adhesion force before power supply at high temperature (gf / 25mm): The sample of the electrolytic adhesive film was 25mm x 100mm in size and 60μm in thickness, and an aluminum foil of 50μm in thickness was attached to the back of the sample. The sample was attached to a stainless steel plate. A 2kg roller was rolled back and forth three times at a speed of 300mm / s, and the sample was left to stand at 70°C and ambient humidity. After 72 hours, the adhesion force was measured on a tensile tester.

[0038] Adhesion force after power supply at high temperature (gf / 25mm): The sample of the electrolytic adhesive film was 25mm x 100mm in size and 60μm in thickness, and an aluminum foil of 50μm in thickness was attached to the back of the sample. The sample was attached to a stainless steel plate. A 2kg roller was rolled back and forth three times at a speed of 300mm / s, and the sample was left to stand at 70°C and ambient humidity. After 72 hours, the positive electrode of a direct current power supply was connected to the conductive substrate, and the negative electrode was connected to the stainless steel plate. A direct current of 9V was supplied for 30 seconds, and the adhesion force was measured on a tensile tester immediately after the power supply was completed.

[0039] Adhesion force before power supply at high temperature and high humidity (gf / 25mm): The sample of the electrolytic adhesive film was 25mm x 100mm in size and 60μm in thickness, and an aluminum foil of 50μm in thickness was attached to the back of the sample. The sample was attached to a stainless steel plate. A 2kg roller was rolled back and forth three times at a speed of 300mm / s, and the sample was left to stand at 85°C and 85% humidity. After 72 hours, the adhesion force was measured on a tensile tester.

[0040] Adhesion force (gf / 25mm) after power supply under high temperature and high humidity: The sample of the electrolytic adhesive film has a size of 25mm x 100mm and a thickness of 60μm, and an aluminum foil with a thickness of 50μm is attached to the back of the sample to be tested. The sample is attached to a stainless steel plate. A 2kg roller is rolled back and forth 3 times at a speed of 300mm / s. The sample is placed in an environment of 85℃ and 85% humidity. After 72h, the positive electrode of a direct current power supply is connected to the conductive substrate, and the negative electrode is connected to the stainless steel plate. A direct current with a voltage of 9V is supplied for 30s. After the power supply is completed, the adhesion force at 180° is tested quickly on a tensile testing machine.

[0041] High temperature retention (mm): The sample of the electrolytic adhesive film has a size of 25mm x 100mm and a thickness of 60μm, and a PET film with a thickness of 25μm is attached to the back of the sample to be tested. The sample is attached to a stainless steel plate, and the attachment area is 25mm x 25mm. A 2kg roller is rolled back and forth 10 times at a speed of 300mm / s, and the sample is left to stand for 30min. The end of the sample is fixed, and a 1kg weight is hung. The sample is placed in an environment of 70℃, and after 24h, it is observed whether the sample falls off the test stainless steel plate. If the sample falls off the stainless steel plate during the period, the time (h) from placement to falling off is recorded. If the sample does not fall off the stainless steel plate but slips during the period, the distance of the slip (mm) is recorded. The specific results are shown in Table 1 below: Table 1 Performance test table

[0042] From the above Examples 1-2 and Comparative Example 1 and the comparison of the test results in Table 1, it can be found that: In combination with Examples 1-2 and Comparative Example 1, the electrically debondable adhesive tape of the present application can maintain a high adhesion force after multiple debonding, and the debonding performance is almost unchanged, or even has a slight debonding advantage.

[0043] In summary, the electrically debondable adhesive tape of the present application has excellent high temperature retention performance and can maintain stable performance in a high temperature environment.

[0044] The present application has been described in detail by combining specific embodiments and exemplary examples, but these descriptions cannot be understood as limiting the present application. Those skilled in the art understand that the technical solutions and embodiments of the present application can be variously replaced, modified or improved without deviating from the spirit and scope of the present application, and these all fall within the scope of the present application. The protection scope of the present application is subject to the appended claims.

[0045] All publications, patent applications, patents and other references mentioned in this specification are incorporated herein by reference. Unless otherwise defined, all technical and scientific terms used in this specification have the meanings commonly understood by one of ordinary skill in the art. In case of conflict, the definitions in this specification prevail.

[0046] When the specification derives a material, substance, method, step, device or component, etc. with the headword "known to those skilled in the art", "prior art" or similar expressions, the object derived by the headword encompasses those which are conventionally used in the art at the time of the present application, but also those which are not yet conventionally used but will become recognized as suitable for similar purposes in the art.

[0047] In the context of the present specification, any matter or item not mentioned in addition to the explicitly stated matters or items directly applies those known in the art without any change, unless otherwise specified.

Claims

1. An environmentally friendly electrically adhesive tape with a long cycle life, characterized by, The electrically-reduced adhesive tape comprises an electrically-reduced adhesive layer and release film layers coated on both sides of the electrically-reduced adhesive layer; the electrically-reduced adhesive layer comprises the following components by weight: a pressure-sensitive adhesive 90-110 parts; a curing agent 1-4 parts; an ionic polymer 5-10 parts; the ionic polymer comprises an anion-cation salt modified by an organic segment.

2. The environmentally friendly high cycle life electrically reduced adhesion tape according to claim 1, characterized in that, The pressure-sensitive adhesive comprises at least one of a solvent-based acrylate adhesive, a water-based acrylate adhesive, a polyurethane adhesive, a silicone adhesive or a rubber adhesive.

3. The environmentally friendly high cycle life electrically reduced adhesion tape according to claim 1, characterized in that, The curing agent comprises at least one of an isocyanate-based curing agent, an epoxy-based curing agent or an aziridine-based curing agent.

4. The environmentally friendly high cycle life electrically reduced adhesion tape according to claim 1, characterized in that, The ionic polymer comprises at least one of a modified ammonium salt, a modified lithium salt, a modified sulfonic acid salt or a modified phosphonic acid salt.

5. The environmentally friendly high cycle life electrically reduced adhesion tape according to claim 1, characterized in that, The high-cycle-life environmentally-friendly electrically-reduced adhesive tape further comprises: a conductive substrate arranged between the electrically-reduced adhesive layer and the release film layer on one side, the conductive substrate comprising any one of an aluminum foil substrate, a copper foil substrate or a metal fiber cloth substrate; and a bonding agent arranged on the side of the conductive substrate away from the electrically-reduced adhesive and bonded to the release film layer on one side.

6. The environmentally friendly high cycle life electrically reduced adhesion tape according to claim 5, characterized in that, The bonding agent comprises any one of an epoxy resin bonding agent, a phenolic resin bonding agent, a urea-formaldehyde resin bonding agent or a polyurethane bonding agent.

7. The method of claim 1-6, wherein the method is characterized by, The preparation steps comprise: mixing a pressure-sensitive adhesive, a curing agent, an ionic polymer and a solvent to obtain an electrically-reduced adhesive; selecting a release film, coating the electrically-reduced adhesive on one side of the release film, and performing drying and curing treatment to obtain a release film coated with an electrically-reduced adhesive layer; then, in the order of from inside to outside, bonding the conductive substrate and the electrically-reduced adhesive layer of the release film coated with the electrically-reduced adhesive layer, and then coating a bonding agent and a release film on the other side of the conductive substrate, to obtain the electrically-reduced adhesive tape.

8. The method for preparing the high cycle life environmentally friendly electro-adhesive tape according to claim 7, characterized in that, The drying and curing treatment comprises drying treatment at 110-130°C, and then curing at 45-55°C for 40-60 hours.

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