Intelligent adhesive tape capable of losing viscosity after being electrified

Abstract

The invention relates to the technical field of electronic manufacturing, and discloses an intelligent adhesive tape capable of losing viscosity after being electrified, which comprises the following hierarchical structures which are sequentially arranged from top to bottom: a first layer is release paper or a release film; the second layer is a high-viscosity acrylic adhesive layer, and the normal-temperature viscous force test value of a high-viscosity acrylic adhesive is not less than 1.2 kg; the third layer is a base material containing a conductive metal layer; the fourth layer is an adhesive layer containing an electroactive material; and the fifth layer is release paper or a release film. The invention provides the intelligent adhesive tape with viscosity loss after electrification, which is reasonable in structure and excellent in performance, and successfully realizes the function of viscosity loss after electrification triggering. The high-viscosity acrylic adhesive, the conductive metal layer and the functional electroactive material are reasonably selected, and mature coating and curing processes are combined, so that the high viscosity of the adhesive tape at normal temperature and the rapid viscosity loss performance after electrification are ensured.

Description

Technical Field

[0001] This invention relates to the field of electronic manufacturing technology, specifically to a smart tape that loses its adhesiveness after being powered on. Background Technology

[0002] Adhesive tape, widely used in industrial manufacturing, electronic assembly, packaging, and daily life, is popular due to its ease of use and good adhesive performance. However, traditional tape has some significant drawbacks, particularly in disassembly. Removing conventional tape often requires considerable peeling force, increasing both the difficulty and time cost, and easily leaving adhesive residue on the surface of adhered objects, affecting aesthetics and future use. Furthermore, traditional tape is generally for single use only, making it difficult to re-apply after removal, resulting in resource waste and environmental pollution.

[0003] To address the aforementioned issues, research on smart tape materials has gradually emerged in recent years, with "smart tapes" that can change their adhesive properties in response to external stimuli (such as temperature, electric field, and light) becoming a research hotspot. Among them, electrically induced tack-free smart tapes have attracted widespread attention due to their advantages such as fast response speed, simple control, and ease of integration into integrated circuits. In existing technologies, some smart tapes achieve a decrease in adhesion after being energized using electrochromic materials, electrodeformable materials, or conductive polymers. However, these technologies generally suffer from drawbacks such as complex manufacturing processes, incomplete or irreversible tack-free effects, and limited reusability, making it difficult to meet the needs of practical industrial applications.

[0004] Furthermore, current electrically conductive de-adhesive tapes largely rely on expensive functional materials or special substrates, resulting in high costs and limiting their widespread adoption in large-scale production and application. A key challenge in the current technological field is how to achieve smart tapes that are simple in structure, have mature manufacturing processes, are cost-effective, and support multiple reusability, while ensuring high adhesion and rapid de-adhesion performance. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a smart tape that loses its adhesiveness after being powered on, thereby solving the aforementioned problems.

[0006] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a smart tape that loses its adhesiveness upon being powered on, comprising the following hierarchical structure arranged from top to bottom: The first layer is release paper or release film; The second layer is a high-viscosity acrylic adhesive layer, and the room temperature tack test value of the high-viscosity acrylic adhesive is not less than 1.2kg; The third layer is a substrate containing a conductive metal layer; The fourth layer is an adhesive layer containing electroactive materials; The fifth layer is release paper or release film.

[0007] As a preferred embodiment of the present invention, the method for preparing a smart tape that loses its adhesion after being energized includes the following steps: Step 1: Mix the high-viscosity acrylic adhesive containing electroactive materials with the corresponding hardener in a certain proportion, apply it evenly to the release liner using a scraper coating device, with a coating thickness of 50μm, and dry it at a high temperature of 110~130℃ to make it completely cured. Then, adhere the layer to the metal surface of the substrate to prepare a single-sided semi-finished product. Step 2: Mix the high-viscosity acrylic adhesive and the corresponding hardener in a uniform ratio, apply the mixture evenly to the release surface of the white glassine release paper using a scraper coating device, and dry it at a high temperature of 110~130℃ to make it completely cured, and then adhere it to the un-adhesive side of the single-sided semi-finished product prepared in Step 1. Step 3: Roll up and cure the finished product obtained in Step 2 to obtain a smart tape with the function of losing adhesion after being energized.

[0008] As a preferred technical solution of the present invention, the room temperature tack test value of the high-viscosity acrylic adhesive is not less than 1.2 kg.

[0009] As a preferred technical solution of the present invention, the smart tape that loses its adhesion after being powered on rapidly decreases its adhesive force within 20 seconds under a constant 9V voltage condition, and completely loses its adhesion within 1 minute without any residue falling off.

[0010] As a preferred technical solution of the present invention, the smart tape that loses its adhesion after being powered on can be reused and can undergo up to three cycles of losing adhesion after being powered on.

[0011] As a preferred embodiment of the present invention, the conductive metal layer is one or more of copper, aluminum, or silver.

[0012] As a preferred technical solution of the present invention, the electroactive material is a functional material that can change the internal interface structure of the adhesive when an electric current is applied, resulting in a rapid decrease in adhesion.

[0013] Compared with the prior art, the present invention provides a smart tape that loses its adhesion after being energized, which has the following beneficial effects: This invention proposes a structurally sound and high-performance smart tape that de-adheses upon energization, successfully achieving the function of triggering de-adhesion upon power application. By rationally selecting high-viscosity acrylic adhesive, a conductive metal layer, and functional electroactive materials, combined with mature coating and curing processes, the tape maintains high adhesion at room temperature and exhibits rapid de-adhesion upon energization. This smart tape not only effectively solves the problems of difficult disassembly and excessive adhesive residue associated with traditional tapes, but also possesses reusability, significantly improving economic efficiency and environmental value. Its rapid response, ease of operation, and wide applicability make it a promising candidate for application in electronics manufacturing, repair and disassembly, and industrial assembly. The widespread application of this invention can significantly optimize production processes in related industries, improve work efficiency, reduce labor intensity, and promote the development and application of smart materials technology, thus possessing significant social and economic value. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the preparation method steps of the present invention.

[0015] Among them: 1. First layer; 2. Second layer; 3. Third layer; 4. Fourth layer; 5. Fifth layer. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the invention, and not all of them. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0017] It should be noted that if the embodiments of the invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0018] Furthermore, "multiple" refers to two or more. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the invention.

[0019] Please see Figure 1-2 A smart tape that loses its stickiness when powered on: Release material: Use common release paper or release film (first layer 1) to facilitate subsequent processes and tape removal.

[0020] High-viscosity acrylic adhesive layer (second layer 2): A high-viscosity acrylic adhesive with a tack strength of not less than 1.2 kg at room temperature is selected, exhibiting good adhesion and weather resistance. In its formulation, the adhesive and hardener are mixed according to the manufacturer's recommended ratio to ensure adhesive uniformity and curing effect.

[0021] Conductive metal layer (third layer 3): It is made of conductive metal thin film such as copper, aluminum or silver, and is prepared by metal evaporation, sputtering or coating processes. The thickness is generally in the range of tens of nanometers to hundreds of nanometers to ensure good conductivity without affecting the flexibility of the tape.

[0022] Electroactive materials (fourth layer 4): These are functional materials that can alter the adhesive interface structure and cause a rapid decrease in adhesion when an electric current is applied. Examples include certain conductive polymers or nanocomposites with electrochromic or electroviscoelastic properties. These materials are uniformly dispersed in the adhesive to form an electroactive interface layer.

[0023] Preparation process Step 1: Preparation of a high-viscosity acrylic adhesive layer containing electroactive materials The high-viscosity acrylic adhesive containing electroactive materials is thoroughly mixed with the corresponding hardener according to the predetermined ratio.

[0024] Using a doctor blade coating device, the well-mixed adhesive is evenly applied to the release substrate, with the coating thickness controlled at approximately 50 μm.

[0025] Dry the coated substrate at a high temperature of 110~130℃ for about 10~20 minutes to ensure that the adhesive is completely cured and forms a strong bonding layer.

[0026] After curing, the layer is adhered to the metal surface of the substrate (third layer) to form the first part of the semi-finished product.

[0027] Step 2: Prepare an adhesive layer with debonding function Mix the high-viscosity acrylic adhesive and hardener thoroughly according to the specified ratio.

[0028] Using a doctor blade coating device, the mixed adhesive is evenly applied to the release surface of the white glassine release paper, with the coating thickness controlled at around 50μm.

[0029] Dry and cure at a high temperature of 110~130℃ to ensure complete curing of the adhesive layer.

[0030] The cured adhesive layer is adhered to the unbonded surface of the semi-finished product prepared in step 1 to form the second part of the semi-finished product.

[0031] Step 3: Winding and Curing The two semi-finished products are rolled up and cured under suitable temperature and environmental conditions (such as being placed in a constant temperature and humidity environment for several hours) to improve adhesion and interfacial bonding.

[0032] Once completed, you will obtain a smart tape that loses its adhesiveness when powered on.

[0033] Performance verification Adhesion test: Under normal temperature (approximately 25°C) conditions, the adhesion value of the tape should be measured using a standard adhesion tester and should not be less than 1.2 kg.

[0034] Loss of adhesion performance: Under a constant voltage of 9V, when the tape is adhered to the substrate, the adhesion decreases rapidly within 20 seconds of being energized; within 1 minute, the tape completely loses its adhesive force and no residual adhesive falls off.

[0035] Reusable: After multiple tests, the tape can be re-adhesive after losing its stickiness when powered on, and can be reused up to three times without affecting its performance.

[0036] Functions and characteristics of materials The conductive metal layer (third layer) provides the necessary conductive path to ensure that the electroactive material can undergo changes in its interface structure when energized.

[0037] The electroactive material (fourth layer) changes the adhesive interface structure after being energized, causing the adhesion to decrease rapidly, thereby achieving the "loosening" effect.

[0038] The tape has a reasonable structural design with distinct layers, which ensures its rapid loss of adhesion and repeated use under power.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A smart tape that loses its adhesiveness upon being energized, characterized in that, This includes the following hierarchical structure set from top to bottom: The first layer (1) is release paper or release film; The second layer (2) is a high-viscosity acrylic adhesive layer, wherein the room temperature tack test value of the high-viscosity acrylic adhesive is not less than 1.2 kg; The third layer (3) is a substrate containing a conductive metal layer; The fourth layer (4) is an adhesive layer containing electroactive materials; The fifth layer (5) is release paper or release film.

2. The smart tape that loses its adhesion after being energized, as described in claim 1, is characterized in that... The method for preparing the smart tape that loses its adhesion after being energized includes the following steps: Step 1: Mix the high-viscosity acrylic adhesive containing electroactive materials with the corresponding hardener in a certain proportion, apply it evenly to the release liner using a scraper coating device, with a coating thickness of 50μm, and dry it at a high temperature of 110-130℃ to make it completely cured. Then, adhere the layer to the metal surface of the substrate to prepare a single-sided semi-finished product. Step 2: Mix the high-viscosity acrylic adhesive and the corresponding hardener in a uniform ratio, apply the mixture evenly to the release surface of the white glassine release paper using a scraper coating device, and dry it at a high temperature of 110-130℃ to make it completely cured, and then adhere it to the un-adhesive side of the single-sided semi-finished product prepared in Step 1. Step 3: Roll up and cure the finished product obtained in Step 2 to obtain a smart tape with the function of losing adhesion after being energized.

3. The smart tape that loses its adhesion after being energized, as described in claim 2, is characterized in that: The high-viscosity acrylic adhesive has a room temperature tack test value of not less than 1.2 kg.

4. The smart tape that loses its adhesion after being energized, as described in claim 1, is characterized in that: The smart tape that loses its adhesion after being powered on exhibits a rapid decrease in adhesive strength within 20 seconds under a constant 9V voltage, and complete loss of adhesion with no residue within 1 minute.

5. The smart tape that loses its adhesion after being energized, as described in claim 1, is characterized in that: The smart tape that loses its stickiness after being powered on can be reused, and can undergo up to three cycles of losing stickiness after being powered on.

6. The smart tape that loses its adhesion after being energized according to claim 1, characterized in that: The conductive metal layer is one or more of copper, aluminum, or silver.

7. The smart tape that loses its adhesion after being energized according to claim 1, characterized in that: The electroactive material is a functional material that can change the internal interface structure of the adhesive when an electric current is applied, resulting in a rapid decrease in adhesive strength.

Images