Noise reduction adhesive tape

Abstract

The utility model 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 tape, in particular to a noise-reducing adhesive tape. BACKGROUND

[0002] With the continuous development of electronic devices, the demand for energy density and total capacity of lithium batteries is increasing. In order to meet this demand, electronic device manufacturers generally adopt the design of parallel connection of multiple battery cells to effectively improve the overall capacity of the lithium battery pack. In the traditional process, these battery cells are usually tightly fixed together by wrapping adhesive tape to ensure stable connection between the battery cells and structural integrity of the battery pack.

[0003] However, although the wrapping adhesive tape plays a key role in fixing the battery cells, it also brings some potential problems. Especially in the case of external vibration of the battery pack, there are often small gaps between the battery cells due to manufacturing tolerances or material characteristics. These gaps will cause the adhesive tape to vibrate in these unsupported areas during the vibration process, thereby generating noise. After the lithium battery pack is assembled, the whole machine vibration test is an important link to evaluate the performance and reliability of the battery pack. However, the noise generated by the vibration of the adhesive tape often becomes an abnormal point in the test, not only affecting the accuracy of the test, but also possibly causing the battery pack to be judged as unqualified for the vibration test due to noise problems. This not only increases the production cost and test time, but also may adversely affect the market competitiveness and user satisfaction of the product.

[0004] The above content is only used to assist in understanding the technical solutions of the present application and does not represent the acknowledgement of the above content as prior art. UTILITY MODEL CONTENT

[0005] The main purpose of the present application is to provide a noise-reducing adhesive tape, which aims to solve or at least partially solve the problem of generating large noise by the adhesive tape during vibration.

[0006] To achieve the above purpose, the present application provides a noise-reducing adhesive tape, which comprises:

[0007] a first substrate layer;

[0008] a second substrate layer;

[0009] a flexible layer arranged 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] a glue layer arranged on the side of the second substrate layer away from the flexible layer.

[0011] In an embodiment, the flexible layer comprises: a glue layer, the glue layer comprises: an acrylate pressure sensitive adhesive, a rubber-based pressure sensitive adhesive, a silicone pressure sensitive adhesive, or a damping glue.

[0012] In an embodiment, the flexible layer comprises: a flame-retardant layer.

[0013] In an embodiment, the flame-retardant layer comprises: a polyester coating, a polyurethane coating, or an acrylate coating added with a phosphorus-nitrogen-based flame retardant.

[0014] In an embodiment, the noise-reducing adhesive tape further comprises: a textured release layer disposed on a side of the adhesive layer away from the second substrate layer.

[0015] In an embodiment, the noise-reducing adhesive tape further comprises: a printed coating layer disposed on a side of the first substrate layer away from the flexible layer.

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

[0017] In an embodiment, the first substrate layer has a thickness of 10-25 μm;

[0018] and / or, the second substrate layer has a thickness of 10-25 μm;

[0019] and / or, the flexible layer has a thickness of 5-35 μm;

[0020] and / or, the adhesive layer has a thickness of 5-25 μm.

[0021] In an embodiment, the material of the first substrate layer comprises: PET, PP, PE, PC, PI, or PO;

[0022] and / or, the material of the second substrate layer comprises: PET, PP, PE, PC, PI, or PO.

[0023] In an embodiment, the noise-reducing adhesive tape is applied to the wrapping of a battery cell.

[0024] The one or more technical solutions provided by the embodiments of the present application have at least the following technical effects: provide a noise reduction adhesive tape, comprising: a first substrate layer, a second substrate layer, a flexible layer arranged 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; and a glue layer arranged on the side of the second substrate layer away from the flexible layer. The embodiments of the present application set a flexible layer with lower hardness between the first substrate layer and the second substrate layer. On the one hand, the low hardness of the flexible layer reduces the sound generated during the vibration process, and on the other hand, it can block the transmission of vibration between the layers of the noise reduction adhesive tape, that is, the mechanical vibration energy is converted into heat or other forms of energy, so that the vibration amplitude gradually decreases, thereby achieving the effect of vibration and noise reduction. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 Structure diagram of the noise reduction adhesive tape related to the embodiments of the present application Figure 1 ;

[0026] Figure 2 Structure diagram of the noise reduction adhesive tape related to the embodiments of the present application Figure 2 ;

[0027] Figure 3 Structure diagram of the noise reduction adhesive tape related to the embodiments of the present application Figure 3 ;

[0028] Figure 4 Structure diagram of the noise reduction adhesive tape related to the embodiments of the present application Figure 4 .

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] Ref. Name Ref. 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 Printed coating

[0031] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely. The specific conditions in the embodiments are not specified, which are carried out according to the conventional conditions or the conditions recommended by the manufacturer. The reagents or instruments used are not specified by the manufacturer, which are conventional products that can be purchased on the market.

[0033] Hereinafter, specific embodiments of the noise-reducing adhesive tape of the present application will be explained in detail with appropriate reference to the accompanying drawings. However, there will be cases where unnecessary detailed explanation will be omitted. For example, there will be cases where detailed explanation of matters known well, repeated explanation of substantially identical structures will be omitted. This is to avoid the following explanation from becoming unnecessarily lengthy and to facilitate understanding by those skilled in the art. Furthermore, the accompanying drawings and the following explanation are provided so that those skilled in the art can fully understand the present application, and are not intended to define the subject matter recited in the claims.

[0034] The ranges disclosed herein are defined by their lower and upper limits. Ranges that include both a lower limit and an upper limit are understood to include all ranges and sub-ranges between the lower and upper limits, inclusive of the lower and upper limits. For example, a range of "1 to 10" is understood to include the range from 1 to 10, and all ranges between (and including) the lower and upper limits of the ranges. Likewise, a range of "1-10" is understood to include the range from 1 to 10, and all ranges between (and including) the lower and upper limits of the ranges. In other words, a range of "1-10" is understood to mean "starting at 1 and ending at 10," with the limitation that the end of the range is inclusive of the number 10. Also, by using the term "about" or "approximately" with respect to a reference number (e.g., "about 10"), it is meant that the number can vary from the reference number by up to 10%, preferably up to 5%, and more preferably up to 1%. For example, "about 10" means that the number can vary from 9 to 11. Also, when a parameter is stated to be an integer ≥ 2, it is equivalent to disclose that the parameter is, for example, integer 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0035] If not specifically explained, all embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions.

[0036] If not specifically explained, all technical features and optional technical features of the present application can be combined with each other to form new technical solutions.

[0037] If not specifically explained, all steps of the present application can be performed in sequence or randomly, and preferably in sequence. For example, the method comprises steps (a) and (b), which means that the method can comprise steps (a) and (b) performed in sequence, or steps (b) and (a) performed in sequence. For example, the method further comprises step (c), which means that step (c) can be added to the method in any order. For example, the method can comprise steps (a), (b) and (c), or steps (a), (c) and (b), or steps (c), (a) and (b), etc.

[0038] If not specifically stated, the "including" and "comprising" mentioned in the present application represent open-ended, and can also be closed-ended. For example, the "including" and "comprising" can represent that other components not listed can also be included or contained, or can only include or contain the listed components.

[0039] If not specifically stated, in the present application, the term "or" is inclusive. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, any one 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 A and B are both true (or exist).

[0040] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the technical solutions of the present application will be further described below in combination with the drawings and examples. However, the present application is not limited to the listed examples, and any known changes within the scope of the rights claimed by the present application should also be included.

[0041] The "one embodiment" or "embodiment" referred to herein means that a specific feature, structure or characteristic can be included in at least one implementation of the present application. The "in one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is mutually exclusive with other embodiments.

[0042] In order to better understand the technical solutions of the present application, the specific embodiments will be described in detail below in combination with the drawings and specific embodiments.

[0043] In the related art, electronic device manufacturers generally use adhesive tape to tightly fix multiple parallel electric cores together to ensure stable connection between the electric cores and structural integrity of the battery pack. However, due to manufacturing tolerances or material properties, there are often small gaps between the electric cores, and these gaps form unsupported areas when the battery pack is subjected to external vibration. In these unsupported areas, the adhesive tape becomes the main force component, but due to the existence of the gaps, the adhesive tape cannot obtain direct support from the electric cores. Therefore, when the vibration occurs, the relative movement between the electric cores will cause the adhesive tape to frequently stretch and compress at these gaps, and generate noise. This noise not only interferes with the performance evaluation of the battery pack, but also can adversely affect the structural integrity of the battery pack, such as accelerating the aging of the adhesive tape, reducing the anti-vibration performance of the battery pack, etc.

[0044] In the embodiment, a noise reduction adhesive tape is provided, comprising a first substrate layer, a second substrate layer, a flexible layer arranged 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; and a glue layer arranged on the side of the second substrate layer away from the flexible layer. In the embodiment, the flexible layer with lower hardness is arranged between the first substrate layer and the second substrate layer, on the one hand, the low hardness of the flexible layer reduces the sound generated by itself during vibration, on the other hand, the flexible layer can block the transmission of vibration between the layers of the noise reduction adhesive tape, that is, the mechanical vibration energy 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 application provides a noise reduction adhesive tape, referring to Figure 2 , comprising:

[0046] a first substrate layer 10;

[0047] a second substrate layer 20;

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

[0049] a glue layer 40 arranged on the side of the second substrate layer 20 away from the flexible layer 30.

[0050] In an embodiment, the first substrate layer 10 and the second substrate layer 20 are the main support structure of the noise reduction adhesive tape, and provide a stable adhesion surface for the glue layer 40, so as to ensure that the glue layer 40 can be uniformly and firmly attached thereon; at the same time, the substrate layer has certain strength and stability, and can support the whole tape structure, so that the noise reduction adhesive tape is not easy to deform or break during use.

[0051] The glue layer 40 is the key to realize the adhesion function of the noise reduction adhesive tape, and can firmly adhere the adhesive tape and the adherend (for example, a battery cell) together to form stable adhesion force.

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

[0053] In a feasible implementation manner, the noise reduction adhesive tape of the embodiment of the present application is applied to the wrapping of a battery cell.

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

[0055] In a feasible implementation manner, the thickness of the first substrate layer 10 is 10-25 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, it may cause the flexibility of the entire adhesive tape to decrease, making it difficult to adapt to complex or delicate bonding requirements, and causing the adhesive tape to easily fall off or fail during use, while increasing the production cost. If the thickness of the substrate is too small, it may cause insufficient support of the entire adhesive tape, which is prone to deformation or damage when subjected to stress, and affects its adhesion. Therefore, the thickness of the first substrate layer 10 is determined to be 10-25 μm.

[0056] In an implementation, the thickness of the second substrate layer 20 is 10-25 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 adhesive tape as a whole may be reduced, making it difficult to adapt to complex or delicate bonding requirements, and leading to easy peeling or failure of the adhesive tape during use, while increasing the production cost. If the thickness of the substrate is too small, the support of the adhesive tape as a whole may be insufficient, and deformation or damage may easily occur under stress, affecting the adhesion. Therefore, the thickness of the second substrate layer 20 is determined to be 10-25 μm in the embodiments of the present application.

[0057] In an implementation, the material of the first substrate layer 10 includes PET, PP, PE, PC, PI, or PO.

[0058] In an implementation, the material of the second substrate layer 20 includes PET, PP, PE, PC, PI, or PO.

[0059] PET (polyethylene terephthalate) has high tensile strength and good elongation, so the adhesive tape made of 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 little change in size under different temperature and humidity conditions, and can maintain good flatness and fit. At the same time, PET also has good insulation performance and high transparency.

[0060] PP (polypropylene) has water resistance, oil resistance, and aging resistance, as well as good impact resistance, and can adapt to various complex environmental use requirements.

[0061] PE (polyethylene) has the characteristics of waterproof, stainproof, and shielding, with high peelability and wide application.

[0062] PC (polycarbonate) is a non-crystalline thermoplastic resin with excellent comprehensive performance, and has 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 the corrosion of various chemical media and maintain long service life.

[0064] PO (polyolefin copolymer) is easy to process and fit, and has super tensile strength and tear resistance, and is suitable for the preparation of adhesive tapes requiring high tensile properties.

[0065] Exemplarily, the material and / or thickness of the first substrate layer 10 and the second substrate layer 20 can be the same.

[0066] Exemplarily, the material and / or thickness of the first substrate layer 10 and the second substrate layer 20 can be different.

[0067] Exemplarily, the adhesive layer 40 is composed of an adhesive, which includes a urea-formaldehyde resin adhesive, a polyvinyl acetate adhesive, a polyacrylic resin adhesive, a polyurethane adhesive, a hot-melt adhesive, an epoxy resin adhesive, a synthetic adhesive or a silicone adhesive.

[0068] In an implementable embodiment, the thickness of the adhesive layer 40 is 5-25 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, stress distribution inside the adhesive layer 40 can be uneven, thereby reducing the overall adhesion effect. When the adhesive layer 40 is too thin, the adhesive area provided is limited, which can result in insufficient adhesion between the adhesive tape and the adherend. Therefore, the thickness of the adhesive layer 40 is determined to be 5-25 μm in the embodiments of the present application.

[0069] In an implementable embodiment, the thickness of the flexible layer 30 is 5-35 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 can be weak. If the thickness of the flexible layer 30 is too large, the overall thickness of the noise reduction adhesive tape is increased, which affects the actual application of the adhesive tape. Therefore, the thickness of the flexible layer 30 is determined to be 5-35 μm in the embodiments of the present application.

[0070] In an implementable embodiment, referring to Figure 2 , the flexible layer 30 includes a glue layer 32, which includes an acrylate pressure-sensitive adhesive, a rubber pressure-sensitive adhesive, a silicone pressure-sensitive adhesive or 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] Acrylate pressure-sensitive adhesive is a self-adhesive material that can form a relatively firm bonding force under small force, and is a kind of adhesive that can be tightly bonded to the adherend by applying light finger pressure without the aid of solvents, heat or other means; at the same time, it also has high peel strength and holding power, and has good weather resistance, aging resistance and chemical corrosion resistance.

[0072] Rubber-based pressure-sensitive adhesive is a pressure-sensitive adhesive prepared by mixing and vulcanizing natural rubber, synthetic rubber (such as styrene-butadiene rubber, butyl rubber, chlorobutyl rubber, etc.) as the main raw material. It has excellent elasticity, wear resistance, oil resistance, solvent resistance and aging resistance.

[0073] Silicone pressure-sensitive adhesive is a pressure-sensitive adhesive with silicone polymer as the main body, or an acrylate and silicone-modified rubber type pressure-sensitive adhesive modified by silicone polymer. It has excellent chemical resistance, water resistance, oil resistance, solvent resistance, high temperature resistance, low temperature resistance, thermal degradation resistance and oxidation degradation resistance.

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

[0075] In a feasible implementation mode, referring to Figure 2 , the flexible layer 30 includes a flame-retardant layer 31. By adding the flame-retardant layer 31 with lower hardness than the first base material layer 10 and the second base material layer 20 in the noise reduction adhesive tape, the probability of fire or explosion of the battery fixed by the adhesive tape during charging, discharging or failure can be reduced, that is, the double effects of flame retardation and noise reduction are realized by a functional layer.

[0076] In a feasible implementation mode, the flame-retardant layer 31 includes a polyester coating, a polyurethane coating or an acrylate coating added with phosphorus-nitrogen flame retardant. The phosphorus-nitrogen flame retardant can form a stable carbon layer and non-combustible gas during combustion, which plays a role of heat insulation, oxygen insulation and dilution of combustible gas, thereby significantly reducing the burning speed and heat release rate of the material, and achieving the effect of flame retardation. The hardness and rigidity of the flame-retardant layer 31 are both less than those of the first base material layer 10 and the second base material layer 20.

[0077] For example, the phosphorus-nitrogen flame retardant can be added in the acrylate pressure-sensitive adhesive, rubber-based pressure-sensitive adhesive, silicone pressure-sensitive adhesive and / or damping glue as the flame-retardant layer, so that the flame-retardant layer has the dual effects of noise reduction and flame retardation.

[0078] For example, the noise reduction adhesive tape includes the first base material layer 10, the glue layer 32, the second base material layer 20 and the adhesive layer 40 arranged in sequence.

[0079] Exemplarily, the noise reduction tape comprises a first substrate layer 10, a fire-retardant layer 31, a second substrate layer 20 and an adhesive layer 40 arranged in sequence.

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

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

[0082] In an implementable embodiment, referring to Figure 3 , the noise reduction tape further comprises a textured release layer 50 arranged on the 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, i.e. to keep the adhesive material (such as adhesive) separated during processing or storage. This separation effect ensures that the adhesive material can be easily and cleanly separated from the film, avoiding adhesion and contamination. The textured structure increases the friction, so that the textured release layer 50 can play a role in preventing slipping when adhering to the product. At the same time, the textured structure also has good air exhaust performance, which can reduce the air bubbles generated during the adhesion process and improve the adhesion quality.

[0084] Exemplarily, the textured release layer 50 comprises a Glacon single shower textured release paper, a Glacon double shower textured release paper or a PET textured release film.

[0085] In an implementable embodiment, referring to Figure 3 , the noise reduction tape further comprises a printed coating layer 60 arranged on the side of the first substrate layer 10 away from the flexible layer 30. The printed coating layer 60 can be used for identification and decoration, information transmission, brand promotion and the like, so that the tape not only has the basic adhesion function, but also can meet more diversified and personalized needs.

[0086] In an implementable embodiment, the thickness of the printed coating layer 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] Exemplarily, referring to Figure 4 , the noise reduction tape comprises a printed coating layer 60, a first substrate layer 10, a fire-retardant layer 31, a glue layer 32, a second substrate layer 20, an adhesive layer 40 and a textured release layer 50 arranged in sequence.

[0088] In the embodiment, a noise reduction adhesive tape is provided, comprising: a first substrate layer 10, a second substrate layer 20, a flexible layer 30 arranged between the first substrate layer 10 and the second substrate layer 20, and the hardness of the flexible layer 30 is lower than the hardness of the first substrate layer 10 and the second substrate layer 20; and a glue layer 40 arranged on the side of the second substrate layer 20 away from the flexible layer 30. The embodiment of the present application sets the flexible layer 30 with lower hardness between the first substrate layer 10 and the second substrate layer 20. On the one hand, it relies on the low hardness of the flexible layer 30 to reduce the sound generated during vibration. On the other hand, it can block the transmission of vibration between the layers of the noise reduction adhesive tape, that is, it can convert the mechanical vibration energy into heat or other forms of energy, so that the vibration amplitude gradually decreases, thereby achieving the effect of vibration reduction and noise reduction.

[0089] In order for the above-mentioned details and operations of the embodiments of the present application to be clearly understood by those skilled in the art, and the significant performance of the embodiments of the present application to be embodied, the above-mentioned technical solutions are illustrated by multiple embodiments as follows.

[0090] Embodiment 1

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

[0092] Embodiment 2

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

[0094] Embodiment 3

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

[0096] Embodiment 4

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

[0098] Comparative Example 1

[0099] A tape is provided, comprising: a 14 μm acrylate pressure-sensitive adhesive layer (flexible layer) and a 24 μm PET layer arranged in sequence.

[0100] Comparative Example 2

[0101] A 24 μm PET film.

[0102] The tapes prepared in Examples 1 to 4 and Comparative Examples 1 and 2 were subjected to a frequency of 100 up-and-down vibrations per minute, and the decibel values were detected 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] As can be seen from the experimental results in Table 1, the noise-reducing tapes prepared in Examples 1 to 4 all have lower vibration noise. Compared with the conventional tape substrate (i.e. Comparative Example 2) or the flexible layer arranged on one side of the substrate layer (i.e. Comparative Example 1), the noise-reducing effect is improved.

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

Claims

1. A noise-reducing tape, characterized by, The noise reduction tape comprises: a first substrate layer; a second substrate layer; a flexible layer arranged 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; a sticky layer arranged on the side of the second substrate layer away from the flexible layer.

2. The noise-reducing tape of claim 1, wherein The flexible layer comprises a glue layer, and the glue layer comprises an acrylate pressure-sensitive adhesive, a rubber pressure-sensitive adhesive, a silicone pressure-sensitive adhesive, or a damping glue.

3. The noise-reducing tape of claim 1, wherein The flexible layer comprises a flame-retardant layer.

4. The noise-reducing tape of claim 3, wherein The flame-retardant layer comprises a polyester coating, a polyurethane coating, or an acrylate coating added with a phosphorus-nitrogen flame retardant.

5. The noise-reducing tape of claim 1, wherein The noise reduction tape further comprises a netted release layer arranged on the side of the sticky layer away from the second substrate layer.

6. The noise-reducing tape of claim 1, wherein The noise reduction tape further comprises a printed coating layer arranged on the side of the first substrate layer away from the flexible layer.

7. The noise-reducing tape of claim 6, wherein The thickness of the printed coating layer is 1-5 μm.

8. The noise-reducing tape of claim 1, wherein The thickness of the first substrate layer is 10-25 μm; and / or, the thickness of the second substrate layer is 10-25 μm; and / or, the thickness of the flexible layer is 5-35 μm; and / or, the thickness of the sticky layer is 5-25 μm.

9. The noise-reducing tape of claim 1, wherein The material of the first substrate layer comprises PET, PP, PE, PC, PI, or PO; and / or, the material of the second substrate layer comprises PET, PP, PE, PC, PI, or PO.

10. The noise-reducing tape of claim 1, wherein The noise reduction tape is applied to the wrapping of a battery cell.

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