Noise reduction adhesive tape

Abstract

The invention discloses a noise reduction adhesive tape, relates to the technical field of adhesive tapes, and discloses the noise reduction adhesive tape which comprises a first base material layer and a second base material layer, a second substrate layer; the flexible layer is arranged between the first base material layer and the second base material layer, and the hardness of the flexible layer is lower than that of the first base material layer and that of the second base material layer; and the adhesive layer is arranged on one side, far away from the flexible layer, of the second substrate layer. Noise generated by the adhesive tape during product vibration is effectively reduced, and the noise reduction effect is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of adhesive tapes, and in particular to a noise reduction adhesive tape. Background Art

[0002] With the continuous development of electronic devices, the demand for energy density and total capacity of lithium batteries is growing. In order to meet this demand, electronic equipment manufacturers generally adopt a multi-cell parallel design to effectively increase the overall capacity of lithium battery packs by connecting multiple cells in parallel. In traditional processes, these cells are usually tightly fixed together with wrapping tape to ensure stable connection between cells and structural integrity of the battery pack.

[0003] However, while wrapping tape plays a key role in securing the battery cells, it also brings some potential problems. Especially when the battery pack is subjected to external vibration, there are often tiny gaps between the battery cells due to manufacturing tolerances or material properties. These gaps will cause the tape to vibrate in these unsupported areas during vibration, which in turn generates noise. After the lithium battery is assembled, the whole machine vibration test is an important part of evaluating the performance and reliability of the battery pack. However, the noise generated by the vibration of the tape often becomes an anomaly in the test, which not only affects the accuracy of the test, but may also cause the battery pack to be judged as unqualified for the vibration test due to noise problems. This not only increases production costs and testing time, but may also have an adverse impact on the market competitiveness and user satisfaction of the product.

[0004] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present application is to provide a noise reduction tape, aiming to solve or at least partially solve the problem that the tape generates relatively loud noise during vibration.

[0006] To achieve the above object, the present application provides a noise reduction tape, the noise reduction tape comprising:

[0007] a first substrate layer;

[0008] a second substrate layer;

[0009] A flexible layer is disposed between the first substrate layer and the second substrate layer, and the hardness of the flexible layer is lower than the hardness of the first substrate layer and the second substrate layer;

[0010] The adhesive layer is arranged on a side of the second substrate layer away from the flexible layer.

[0011] In one embodiment, the flexible layer includes: a glue layer, and the glue layer includes: at least one of acrylic pressure-sensitive adhesive, rubber pressure-sensitive adhesive, silicone pressure-sensitive adhesive and damping adhesive.

[0012] In one embodiment, the flexible layer includes: a flame retardant layer.

[0013] In one embodiment, the flame retardant layer includes: at least one of a polyester coating, a polyurethane coating and an acrylate coating to which a phosphorus-nitrogen flame retardant is added.

[0014] In one embodiment, the noise reduction tape further includes: a textured release layer, which is disposed on a side of the adhesive layer away from the second substrate layer.

[0015] In one embodiment, the noise reduction tape further includes: a printed coating layer, which is disposed on a side of the first substrate layer away from the flexible layer.

[0016] In one embodiment, the printed coating has a thickness of 1-5 μm.

[0017] In one embodiment, the thickness of the first substrate layer is 10 to 25 μm;

[0018] and / or, the thickness of the second substrate layer is 10 to 25 μm;

[0019] And / or, the thickness of the flexible layer is 5 to 35 μm;

[0020] And / or, the thickness of the adhesive layer is 5 to 25 μm.

[0021] In one embodiment, the material of the first substrate layer includes: at least one of PET, PP, PE, PC, PI and PO;

[0022] And / or, the material of the second substrate layer includes: at least one of PET, PP, PE, PC, PI and PO.

[0023] In one embodiment, the noise reduction tape is used to wrap battery cells.

[0024] One or more technical solutions proposed in the embodiments of the present application have at least the following technical effects: providing a noise reduction tape, comprising: a first substrate layer, a second substrate layer, a flexible layer disposed between the first substrate layer and the second substrate layer, wherein the hardness of the flexible layer is lower than that of the first substrate layer and the second substrate layer; and an adhesive layer disposed on the side of the second substrate layer away from the flexible layer. The embodiments of the present application, by disposing a flexible layer with lower hardness between the first substrate layer and the second substrate layer, can reduce the sound generated by the flexible layer during vibration on the one hand, and on the other hand, can block the transmission of vibration between the layers of the noise reduction tape, that is, convert the energy of mechanical vibration into heat or other forms of energy, so that the vibration amplitude gradually decreases, thereby achieving the effect of reducing vibration and noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The structure of the noise reduction tape involved in the embodiment of the present application is shown in FIG. Figure 1 ;

[0026] Figure 2 The structure of the noise reduction tape involved in the embodiment of the present application is shown in FIG. Figure 2 ;

[0027] Figure 3 The structure of the noise reduction tape involved in the embodiment of the present application is shown in FIG. Figure 3 ;

[0028] Figure 4 The structure of the noise reduction tape involved in the embodiment of the present application is shown in FIG. Figure 4 .

[0029] Description of Figure Numbers:

[0030] Label name Label name 10 First substrate layer 20 Second substrate layer 30 Flexible layer 31 Flame retardant layer 32 Glue layer 40 Adhesive layer 50 Textured release layer 60 Printing coating

[0031] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to the conventional conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0033] Hereinafter, the embodiments of the noise reduction tape of the present application will be described in detail with appropriate reference to the accompanying drawings. However, there may be cases where unnecessary detailed descriptions are omitted. For example, there may be cases where detailed descriptions of well-known matters and repeated descriptions of actually the same structure are omitted. This is to avoid the following description from becoming unnecessarily lengthy and to facilitate the understanding of those skilled in the art. In addition, the drawings and the following description are provided for those skilled in the art to fully understand the present application and are not intended to limit the subject matter described in the claims.

[0034] The "range" disclosed in the present application is defined in the form of a lower limit and an upper limit, and a given range is defined by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundaries of the particular range. The range defined in this way can be inclusive or exclusive of the end values, and can be arbitrarily combined, that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 60 to 120 and 80 to 110 is listed for a particular parameter, it is understood that a range of 60 to 110 and 80 to 120 is also expected. In addition, if the minimum range values ​​1 and 2 are listed, and if the maximum range values ​​3, 4 and 5 are listed, the following ranges can all be expected: 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4 and 2 to 5. In the present application, unless otherwise specified, the numerical range "a to b" represents an abbreviation of any real number combination between a and b, where a and b are both real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" are listed in this document, and "0-5" is just an abbreviation of these numerical combinations. In addition, when a parameter is expressed as an integer ≥ 2, it is equivalent to disclosing that the parameter is, for example, an integer of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0035] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0036] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0037] If there is no special explanation, all steps of the present application can be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, the method may further include step (c), which means that step (c) may be added to the method in any order. For example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0038] If there is no special explanation, the "include" and "comprising" mentioned in this application are open-ended or closed-ended. For example, the "include" and "comprising" may mean that other components not listed may also be included or only the listed components may be included or only the listed components may be included.

[0039] If not specifically stated, in this application, the term "or" is inclusive. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, any of the following conditions satisfies the condition "A or B": A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0040] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and understandable, the technical solution of the present application is further described below in conjunction with the accompanying drawings and embodiments. However, the present application is not limited to the listed embodiments, and should also include any other known changes within the scope of the rights claimed in the present application.

[0041] The term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present application. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0042] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0043] In the related art, electronic equipment manufacturers generally use tape to tightly fix multiple parallel cells together to ensure stable connection between the cells and the structural integrity of the battery pack. However, due to manufacturing tolerances or material properties, there are often tiny gaps between the cells, and these gaps will form unsupported areas when the battery pack is subjected to external vibrations. In these unsupported areas, the tape becomes the main force-bearing component, but due to the existence of the gap, the tape cannot obtain direct support from the battery cell. Therefore, when vibration occurs, the relative movement between the cells will cause the tape to frequently stretch and compress and deform in these gaps, and generate noise. This noise will not only interfere with the performance evaluation of the battery pack, but may also have an adverse effect on the structural integrity of the battery pack, such as accelerating the aging of the tape and reducing the seismic resistance of the battery pack.

[0044] In this embodiment, a noise reduction tape is provided, comprising: a first substrate layer, a second substrate layer, a flexible layer disposed between the first substrate layer and the second substrate layer, wherein the hardness of the flexible layer is lower than that of the first substrate layer and the second substrate layer; and an adhesive layer disposed on a side of the second substrate layer away from the flexible layer. In this embodiment of the application, by disposing a flexible layer with lower hardness between the first substrate layer and the second substrate layer, on the one hand, the sound generated by the flexible layer during vibration is reduced by the low hardness of the flexible layer, and on the other hand, the transmission of vibration between the layers of the noise reduction tape can be blocked, that is, the energy of mechanical vibration is converted into heat or other forms of energy, so that the vibration amplitude gradually decreases, thereby achieving the effect of vibration reduction and noise reduction.

[0045] Based on this, the embodiment of the present application provides a noise reduction tape, referring to Figure 2 ,include:

[0046] A first substrate layer 10;

[0047] A second substrate layer 20;

[0048] The flexible layer 30 is disposed between the first substrate layer 10 and the second substrate layer 20, and the hardness of the flexible layer 30 is lower than that of the first substrate layer 10 and the second substrate layer 20;

[0049] The adhesive layer 40 is disposed on a side of the second substrate layer 20 away from the flexible layer 30 .

[0050] In a feasible embodiment, the first substrate layer 10 and the second substrate layer 20 are the main supporting structure of the noise reduction tape, providing a stable attachment surface for the adhesive layer 40, ensuring that the adhesive layer 40 can be evenly and firmly attached thereto; at the same time, the substrate layer has a certain strength and stability, which can support the entire tape structure, so that the noise reduction tape is not easily deformed or damaged during use.

[0051] The adhesive layer 40 is the key to the noise reduction tape to achieve the bonding function. It can firmly bond the tape to the adherend (for example, a battery cell) to form a stable bonding force.

[0052] The flexible layer 30 is the key to achieve the noise reduction of the tape; since the first substrate layer 10 and the second substrate layer 20 are the main supporting structures of the noise reduction tape, they usually have a certain hardness and rigidity to better support the entire tape structure. But at the same time, greater hardness and rigidity will make it difficult for the tape to deform and absorb energy. Therefore, when the tape is subjected to external force (such as vibration), it is more likely to produce greater stress and strain, resulting in more obvious vibration and noise. Based on this, the embodiment of the present application sets a flexible layer 30 between the first substrate layer 10 and the second substrate layer 20, which has lower rigidity and hardness than the first substrate layer 10 and the second substrate layer 20. On the one hand, the low hardness of the flexible layer 30 is relied on to reduce the sound generated by itself during the vibration process, and on the other hand, the transmission of vibration between the layers of the noise reduction tape is blocked, that is, the energy of mechanical vibration is converted into heat or other forms of energy, so that the vibration amplitude gradually decreases, thereby achieving the effect of vibration reduction and noise reduction. Compared with the conventional noise reduction scheme of setting a damping rubber layer on one side of the tape, the embodiment of the present application can achieve better noise reduction effect.

[0053] In one feasible implementation, the noise reduction tape of the embodiment of the present application is used for wrapping battery cells.

[0054] Exemplarily, the noise reduction tape of the embodiment of the present application is applied to wrapping cells of a multi-cell lithium battery pack.

[0055] In one feasible embodiment, the thickness of the first substrate layer 10 is 10 to 25 μm; for example, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, 20 μm, 21 μm, 22 μm, 23 μm, 24 μm, 25 μm, etc. If the thickness of the substrate is too large, the flexibility of the tape as a whole may decrease, making it difficult to adapt to complex or delicate pasting requirements, and causing the tape to easily fall off or fail during use, while increasing the production cost. If the thickness of the substrate is too small, the overall support of the tape may be insufficient, and it may be easily deformed or damaged when subjected to force, and its adhesion may be affected. Therefore, the embodiment of the present application determines that the thickness of the first substrate layer 10 is 10 to 25 μm.

[0056] In one feasible embodiment, the thickness of the second substrate layer 20 is 10 to 25 μm; for example, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, 20 μm, 21 μm, 22 μm, 23 μm, 24 μm, 25 μm, etc. If the thickness of the substrate is too large, the flexibility of the tape as a whole may decrease, making it difficult to adapt to complex or delicate pasting requirements, and causing the tape to easily fall off or fail during use, while increasing the production cost. If the thickness of the substrate is too small, the overall support of the tape may be insufficient, and it may be easily deformed or damaged when subjected to force, and its adhesion may be affected. Therefore, the embodiment of the present application determines that the thickness of the second substrate layer 20 is 10 to 25 μm.

[0057] In one feasible embodiment, the material of the first substrate layer 10 includes at least one of PET, PP, PE, PC, PI and PO.

[0058] In one feasible embodiment, the material of the second substrate layer 20 includes at least one of PET, PP, PE, PC, PI and PO.

[0059] PET (polyethylene terephthalate) has high tensile strength and good elongation. Therefore, the tape made from PET is tough and durable, not easy to break or damage, and can withstand large tension and pressure. In addition, PET has good dimensional stability, with minimal dimensional changes under different temperature and humidity conditions, and can maintain good flatness and fit. At the same time, PET also has good insulation properties and high transparency.

[0060] PP (polypropylene) is resistant to water, oil and aging, as well as having good impact resistance, and can adapt to the use requirements in various complex environments.

[0061] PE (polyethylene) has the characteristics of being waterproof, anti-fouling, and masking, with high peelability and wide application.

[0062] PC (polycarbonate) is an amorphous thermoplastic resin with excellent comprehensive properties, including excellent electrical insulation, elongation, dimensional stability and chemical corrosion resistance.

[0063] PI (polyimide) has extremely high high temperature resistance and can remain stable in high temperature environments without deformation or cracking; at the same time, it can resist erosion by various chemical media and maintain a long service life.

[0064] PO (polyolefin copolymer) is easy to process and laminate, and has super tensile strength and tear resistance, making it suitable for the preparation of tapes that require high tensile properties.

[0065] For example, the first substrate layer 10 and the second substrate layer 20 may be made of the same material and / or have the same thickness.

[0066] For example, the materials and / or thicknesses of the first substrate layer 10 and the second substrate layer 20 may be different.

[0067] Exemplarily, the adhesive layer 40 is composed of an adhesive, and the adhesive includes at least one of urea-formaldehyde resin adhesive, polyvinyl acetate adhesive, polyacrylic resin adhesive, polyurethane adhesive, hot melt adhesive, epoxy resin adhesive, synthetic adhesive and organic silicone adhesive.

[0068] In a feasible embodiment, the thickness of the adhesive layer 40 is 5 to 25 μm; for example, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, 20 μm, 21 μm, 22 μm, 23 μm, 24 μm, 25 μm, etc. When the adhesive layer 40 is too thick, it may cause uneven stress distribution inside the adhesive layer 40, thereby reducing the overall adhesion effect. When the adhesive layer 40 is too thin, the adhesive area provided is limited, which may result in insufficient adhesion between the tape and the adherend. Therefore, the embodiment of the present application determines that the thickness of the adhesive layer 40 is 5 to 25 μm.

[0069] In a feasible embodiment, the thickness of the flexible layer 30 is 5 to 35 μm; for example, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 20 μm, 21 μm, 22 μm, 23 μm, 24 μm, 25 μm, 26 μm, 27 μm, 28 μm, 29 μm, 30 μm, 31 μm, 32 μm, 33 μm, 34 μm, 35 μm, etc. If the thickness of the flexible layer 30 is too small, the noise reduction effect may be weak. If the thickness of the flexible layer 30 is too large, the overall thickness of the noise reduction tape will be increased, affecting the practical application of the tape. Therefore, the embodiment of the present application determines that the thickness of the flexible layer 30 is 5 to 35 μm.

[0070] In one possible implementation, referring to Figure 2 The flexible layer 30 includes a glue layer 32, which includes at least one of an acrylic pressure-sensitive adhesive, a rubber pressure-sensitive adhesive, a silicone pressure-sensitive adhesive, and a damping adhesive. The hardness and rigidity of the glue layer 32 are both smaller than those of the first substrate layer 10 and the second substrate layer 20.

[0071] Acrylic pressure-sensitive adhesive is a self-adhesive material that can form a relatively strong bond under a small force. It is a type of adhesive that can be tightly bonded to the adherend with just light finger pressure without the aid of solvents, heat or other means. At the same time, it also has high peel strength and holding force, and has good weather resistance, aging resistance and chemical corrosion resistance.

[0072] Rubber pressure-sensitive adhesive is a pressure-sensitive adhesive made from natural rubber and synthetic rubber (such as styrene-butadiene rubber, butyl rubber, chloroprene rubber, etc.) as the main raw materials through mixing, vulcanization and other processes. It has excellent elasticity, wear resistance, oil resistance, solvent resistance and aging resistance.

[0073] Silicone pressure-sensitive adhesive is a pressure-sensitive adhesive based on silicone polymer, or acrylic and silicone-modified rubber pressure-sensitive adhesive modified by silicone polymer. It has excellent resistance to chemicals, water, oil, solvents, high temperature, low temperature, thermal degradation and oxidation degradation.

[0074] Damping glue is a kind of glue specially used to reduce vibration and noise. It has a high damping coefficient and viscoelasticity, and can effectively absorb and dissipate vibration energy.

[0075] In one possible implementation, referring to Figure 2 The flexible layer 30 includes a flame retardant layer 31. Adding the flame retardant layer 31 having a lower hardness than the first substrate layer 10 and the second substrate layer 20 to the noise reduction tape can further prevent the battery fixed by the tape from catching fire or exploding during charging, discharging or failure on the basis of noise reduction, thereby reducing the probability of danger. That is, the dual effects of flame retardancy and noise reduction can be achieved through a single functional layer.

[0076] In one feasible embodiment, the flame retardant layer 31 includes: at least one of a polyester coating, a polyurethane coating and an acrylic coating to which a phosphorus-nitrogen flame retardant is added. Phosphorus-nitrogen flame retardants can form a stable carbon layer and incombustible gas during combustion, which play the role of heat insulation, oxygen isolation and dilution of combustible gas, thereby significantly reducing the combustion speed and heat release rate of the material, and playing a flame retardant effect. The hardness and rigidity of the flame retardant layer 31 are both less than the factors and rigidity of the first substrate layer 10 and the second substrate layer 20.

[0077] For example, phosphorus-nitrogen flame retardants may be added to acrylic pressure-sensitive adhesives, rubber pressure-sensitive adhesives, silicone pressure-sensitive adhesives and / or damping adhesives to serve as flame-retardant layers, so that the flame-retardant layers have both noise reduction and flame-retardant effects.

[0078] Exemplarily, the noise reduction tape includes a first substrate layer 10 , a glue layer 32 , a second substrate layer 20 , and an adhesive layer 40 which are sequentially arranged.

[0079] Exemplarily, the noise reduction tape includes a first substrate layer 10 , a flame retardant layer 31 , a second substrate layer 20 , and an adhesive layer 40 , which are sequentially arranged.

[0080] Exemplarily, the noise reduction tape includes a first substrate layer 10, a glue layer 32, a flame retardant layer 31, a second substrate layer 20 and an adhesive layer 40 which are arranged in sequence.

[0081] Exemplarily, the noise reduction tape includes a first substrate layer 10, a flame retardant layer 31, a glue layer 32, a second substrate layer 20 and an adhesive layer 40 which are arranged in sequence.

[0082] In one possible implementation, referring to Figure 3 The noise reduction tape further includes: a textured release layer 50 , which is disposed on a side of the adhesive layer 40 away from the second substrate layer 20 .

[0083] The main function of the textured release layer 50 is to provide a release effect, that is, to keep it separated from the sticky material (such as adhesive) during processing or storage. This separation effect ensures that the sticky material can be easily and cleanly separated from the film to avoid adhesion and contamination. The textured structure increases the friction, so that the textured release layer 50 can play an anti-slip role when laminating the product. At the same time, the textured structure also has good air venting properties, which can reduce the bubbles generated during the lamination process and improve the lamination quality.

[0084] Exemplarily, the textured release layer 50 includes: glassine single-layer textured release paper, glassine double-layer textured release paper or PET textured release film.

[0085] In one possible implementation, referring to Figure 3 The noise reduction tape further includes: a printed coating 60, which is disposed on the side of the first substrate layer 10 away from the flexible layer 30. The printed coating 60 can be used for identification and decoration, information transmission, brand promotion, etc., so that the tape not only has a basic bonding function, but also can meet more diversified and personalized needs.

[0086] In a feasible embodiment, the thickness of the printed coating 60 is 1-5 μm, for example, 1 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, 5 μm, etc.

[0087] For example, refer to Figure 4 The noise reduction tape includes a printed coating 60, a first substrate layer 10, a flame retardant layer 31, a glue layer 32, a second substrate layer 20, an adhesive layer 40 and a textured release layer 50 which are arranged in sequence.

[0088] In the present embodiment, a noise reduction tape is provided, comprising: a first substrate layer 10, a second substrate layer 20, a flexible layer 30 disposed between the first substrate layer 10 and the second substrate layer 20, wherein the hardness of the flexible layer 30 is lower than that of the first substrate layer 10 and the second substrate layer 20; and an adhesive layer 40 disposed on a side of the second substrate layer 20 away from the flexible layer 30. In the present embodiment, by disposing the flexible layer 30 with lower hardness between the first substrate layer 10 and the second substrate layer 20, on the one hand, the low hardness of the flexible layer 30 is relied on to reduce the sound generated by itself during the vibration process, and on the other hand, the transmission of vibration between the layers of the noise reduction tape can be blocked, that is, the energy of mechanical vibration is converted into heat or other forms of energy, so that the vibration amplitude gradually decreases, thereby achieving the effect of reducing vibration and noise.

[0089] In order to enable the details and operations of the above embodiments of the present application to be clearly understood by those skilled in the art, and to significantly demonstrate the improved performance of the embodiments of the present application, the above technical solutions are illustrated by means of multiple embodiments below.

[0090] Example 1

[0091] Provided is a noise reduction tape, comprising: a 12 μm PET layer (first substrate layer), a 25 μm acrylate pressure-sensitive adhesive layer (flexible layer) and a 12 μm PET layer (second substrate layer) arranged in sequence, wherein the hardness of the acrylate pressure-sensitive adhesive layer is less than that of the PET layer.

[0092] Example 2

[0093] Provided is a noise reduction tape, comprising: a 12 μm PET layer (first substrate layer), a 13 μm acrylate pressure-sensitive adhesive layer (flexible layer) and a 12 μm PET layer (second substrate layer) arranged in sequence, wherein the hardness of the acrylate pressure-sensitive adhesive layer is less than that of the PET layer.

[0094] Example 3

[0095] Provided is a noise reduction tape, comprising: a 12 μm PET layer (first substrate layer), a 12 μm acrylate pressure-sensitive adhesive layer (flexible layer) and a 12 μm PET layer (second substrate layer) arranged in sequence, wherein the hardness of the acrylate pressure-sensitive adhesive layer is less than that of the PET layer.

[0096] Example 4

[0097] Provided is a noise reduction tape, comprising: a 12 μm PET layer (first substrate layer), an 8 μm acrylate pressure-sensitive adhesive layer (flexible layer) and a 12 μm PET layer (second substrate layer) arranged in sequence, wherein the hardness of the acrylate pressure-sensitive adhesive layer is less than that of the PET layer.

[0098] Comparative Example 1

[0099] Provided is an adhesive tape comprising: a 14 μm acrylic pressure-sensitive adhesive layer (flexible layer) and a 24 μm PET layer which are sequentially arranged.

[0100] Comparative Example 2

[0101] 24 μm PET film.

[0102] The adhesive tapes prepared in Examples 1 to 4 and Comparative Examples 1 and 2 were vibrated up and down at a frequency of 100 times per minute, and the decibel values ​​were measured using a decibel detector. The results are shown in Table 1 below:

[0103] Table 1

[0104] Experimental Group Vibration noise (dB) Example 1 20 Example 2 24 Example 3 28 Example 4 32 Comparative Example 1 85 Comparative Example 2 100

[0105] Referring to the experimental results in Table 1, it can be seen that the noise reduction tapes prepared in Examples 1 to 4 of the present application all have lower vibration noise. Compared with the conventional tape substrate (i.e., Comparative Example 2) or the flexible layer provided on one side of the substrate layer (i.e., Comparative Example 1), the noise reduction effect is improved.

[0106] The above are only preferred embodiments of the present application, and do not limit the scope of the present application. For those skilled in the art, the present application may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of patent protection of the present application.

Claims

1. A noise reduction tape, characterized in that: The noise reduction tape comprises: a first substrate layer; a second substrate layer; A flexible layer is disposed between the first substrate layer and the second substrate layer, and the hardness of the flexible layer is lower than the hardness of the first substrate layer and the second substrate layer; The adhesive layer is arranged on a side of the second substrate layer away from the flexible layer.

2. The noise reduction tape according to claim 1, characterized in that: The flexible layer comprises: a glue layer, and the glue layer comprises: at least one of acrylic pressure-sensitive adhesive, rubber pressure-sensitive adhesive, organic silicon pressure-sensitive adhesive and damping adhesive.

3. The noise reduction tape according to claim 1, characterized in that: The flexible layer includes: a flame retardant layer.

4. The noise reduction tape according to claim 3, characterized in that: The flame retardant layer comprises: at least one of a polyester coating, a polyurethane coating and an acrylate coating to which a phosphorus-nitrogen flame retardant is added.

5. The noise reduction tape according to claim 1, characterized in that: The noise reduction tape further includes: a textured release layer, which is arranged on a side of the adhesive layer away from the second substrate layer.

6. The noise reduction tape according to claim 1, characterized in that: The noise reduction tape further includes: a printed coating layer, which is arranged on a side of the first substrate layer away from the flexible layer.

7. The noise reduction tape according to claim 6, characterized in that: The thickness of the printed coating is 1 to 5 μm.

8. The noise reduction tape according to claim 1, characterized in that: The thickness of the first substrate layer is 10 to 25 μm; and / or, the thickness of the second substrate layer is 10 to 25 μm; And / or, the thickness of the flexible layer is 5 to 35 μm; And / or, the thickness of the adhesive layer is 5 to 25 μm.

9. The noise reduction tape according to claim 1, characterized in that: The material of the first substrate layer includes: at least one of PET, PP, PE, PC, PI and PO; And / or, the material of the second substrate layer includes: at least one of PET, PP, PE, PC, PI and PO.

10. The noise reduction tape according to claim 1, characterized in that: The noise reduction tape is used for wrapping battery cells.

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