Black extinction aluminum-plastic composite film

Abstract

The utility model discloses a black matt aluminum-plastic composite film, which belongs to the technical field of aluminum-plastic composite films, and adopts the technical scheme that the black matt aluminum-plastic composite film comprises an aluminum-plastic composite film main body, and a composite film material with excellent performance and various functions is formed through reasonable design and cooperation of each layer structure. The packaging film is especially suitable for application scenes such as battery cell packaging with high environmental requirements, the black matting layer achieves a good matting effect, adverse effects of light on the interior can be effectively avoided, the light shielding requirements of applications such as light-sensitive battery cells are met, and the protection layer and the anti-static layer are arranged, so that the light shielding effect of the packaging film is improved, and the service life of the packaging film is prolonged. The protective properties such as wear resistance and corrosion resistance of the surface of the aluminum-plastic composite film main body are enhanced, the service life of the aluminum-plastic composite film main body is prolonged, the appearance integrity is maintained, static electricity generated on the surface of the aluminum-plastic composite film main body can be efficiently eliminated, and the problems of dust adsorption, influence on the performance of a battery cell, even potential safety hazards and the like caused by the static electricity are avoided.

Description

Technical Field

[0001] This utility model relates to the field of aluminum-plastic composite film technology, and in particular to a black matte aluminum-plastic composite film. Background Technology

[0002] Lithium-ion battery technology is becoming increasingly mature and is widely used in 3C electronic products, power batteries, and energy storage. This has created a greater demand for lithium battery packaging materials. In the field of lithium battery packaging, there are currently three main packaging methods: cylindrical, square, and pouch. Cylindrical and square packaging mainly uses aluminum and steel shell materials, while pouch mainly uses aluminum-plastic film. Among these three methods, aluminum-plastic film pouch has an increasing market share due to its advantages such as lightweight and safety.

[0003] Traditional aluminum-plastic composite films used for lithium-ion battery cell packaging have poor light-absorbing properties. For lithium-ion batteries, especially some light-sensitive cells, this can easily allow light to pass through, potentially triggering photochemical reactions inside the battery and affecting its performance and safety. Furthermore, light may accelerate the decomposition of electrode materials or the deterioration of the electrolyte, thus affecting the cell's performance.

[0004] Therefore, a black matte aluminum-plastic composite film is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a black matte aluminum-plastic composite film that can solve the problem that the existing aluminum-plastic composite films used for lithium-ion battery cell packaging have poor matte performance. For lithium-ion batteries, especially some light-sensitive cells, light can easily pass through, which may trigger photochemical reactions inside the battery, affecting the battery's performance and safety. Furthermore, light may accelerate the decomposition of electrode materials or the deterioration of electrolyte, thereby affecting the cell's performance.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a black matte aluminum-plastic composite film, comprising an aluminum-plastic composite film body, the aluminum-plastic composite film body comprising a base layer, a first adhesive layer disposed on the top of the base layer, an aluminum foil layer adhered to the top of the first adhesive layer, a black matte layer disposed on the top of the aluminum foil layer, a protective layer disposed on the top of the black matte layer, and an antistatic layer disposed at the bottom of the base layer.

[0007] Preferably, the base layer is made of PET film, and the thickness of the base layer is 15-30μm.

[0008] Preferably, a second adhesive layer is provided on the top of the aluminum foil layer, and the aluminum foil layer is bonded to the black matte layer through the second adhesive layer.

[0009] Preferably, the black matte layer is composed of a black nylon film, and the thickness of the black matte layer is 6-15 μm.

[0010] Preferably, the protective layer is composed of a nano-silica coating and is uniformly coated on top of the black matte layer.

[0011] Preferably, both the first adhesive layer and the second adhesive layer are electrolyte-resistant acrylic adhesives, and are uniformly coated on the top of the base layer and the aluminum foil layer, respectively.

[0012] Preferably, the antistatic layer is composed of a polyaniline coating and is uniformly coated on the bottom of the substrate.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This application, through the rational design and synergistic cooperation of each layer structure, forms a high-performance and multifunctional composite film material, which is particularly suitable for applications such as battery cell packaging with high environmental requirements. The black matte layer achieves a good matte effect, which can effectively prevent light from having an adverse effect on the interior and meet the light-avoidance requirements of applications such as light-sensitive battery cells. The protective layer and antistatic layer not only enhance the wear resistance and corrosion resistance of the aluminum-plastic composite film body surface, extend the service life of the aluminum-plastic composite film body and maintain the integrity of the appearance, but also effectively eliminate the static electricity generated on the surface of the aluminum-plastic composite film body, avoiding problems such as dust adsorption, affecting battery cell performance and even causing safety hazards caused by static electricity. Attached Figure Description

[0015] Figure 1 This is an overall structural diagram of the black matte aluminum-plastic composite film of this utility model;

[0016] Figure 2 This is an exploded view of the main body of the aluminum-plastic composite film of this utility model;

[0017] Figure 3 This is a schematic diagram showing the connection between the base layer, aluminum foil layer, and black matte layer of this utility model.

[0018] In the diagram, 1. Aluminum-plastic composite film body; 2. Base layer; 3. First adhesive layer; 4. Aluminum foil layer; 5. Black matte layer; 6. Protective layer; 7. Antistatic layer; 8. Second adhesive layer. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-3 The present invention provides the following technical solution:

[0021] A black matte aluminum-plastic composite film includes an aluminum-plastic composite film body 1, the aluminum-plastic composite film body 1 includes a base layer 2, a first adhesive layer 3 is provided on the top of the base layer 2, and an aluminum foil layer 4 is adhered to the top of the first adhesive layer 3, a black matte layer 5 is provided on the top of the aluminum foil layer 4, and a protective layer 6 is provided on the top of the black matte layer 5, and an antistatic layer 7 is provided at the bottom of the base layer 2.

[0022] In this embodiment: by setting the aluminum-plastic composite film body 1, and through the reasonable design and synergistic cooperation of each layer structure, a high-performance and multifunctional composite film material is formed, which is especially suitable for application scenarios such as battery cell packaging with high environmental requirements. The black matte layer 5 achieves a good matte effect, which can effectively avoid the adverse effects of light on the interior and meet the light-avoidance requirements of applications such as light-sensitive battery cells. The protective layer 6 and the antistatic layer 7 not only enhance the wear resistance, corrosion resistance and other protective properties of the surface of the aluminum-plastic composite film body 1, extend the service life of the aluminum-plastic composite film body 1 and maintain the integrity of the appearance, but also efficiently eliminate the static electricity generated on the surface of the aluminum-plastic composite film body 1, avoiding problems such as dust adsorption, affecting battery cell performance and even causing safety hazards caused by static electricity.

[0023] Specifically, such as Figure 2 , Figure 3 As shown, the base layer 2 is made of PET film, and the thickness of the base layer 2 is 15-30μm.

[0024] Specifically, such as Figure 2 As shown, the black matte layer 5 is composed of a black nylon film, and the thickness of the black matte layer 5 is 6-15μm.

[0025] In this embodiment: PET film is selected as the base layer 2 because it has good mechanical properties, such as high tensile strength and tear strength, and can withstand certain external forces during the use of the aluminum-plastic composite film body 1 without being easily damaged. Black nylon film is used to form the black matte layer 5. Black nylon itself has good light absorption properties and can effectively absorb and scatter visible light and other light, greatly reducing the light transmittance, thereby achieving an excellent matte effect, which is beneficial in some light-sensitive application scenarios.

[0026] Specifically, such as Figure 2 As shown, the protective layer 6 is composed of a nano-silica coating and is uniformly coated on top of the black matte layer 5.

[0027] Specifically, such as Figure 2 As shown, the antistatic layer 7 is composed of a polyaniline coating and is uniformly coated on the bottom of the base layer 2.

[0028] In this embodiment: the protective layer 6 is made of nano-silica coating. The nano-silica particles can form a dense protective structure on the surface of the black matte layer 5. This coating has high hardness and wear resistance, which can effectively resist the friction and scratching of the aluminum-plastic composite film body 1 by external objects, prevent the surface from being scratched, and maintain the integrity and aesthetics of the appearance of the aluminum-plastic composite film body 1. The antistatic layer 7 is made of polyaniline coating. Polyaniline has good conductivity and can form conductive channels on the surface of the aluminum-plastic composite film body 1. The static charge generated by the aluminum-plastic composite film body 1 during use can be quickly conducted away through these conductive channels to avoid the accumulation of static electricity on the surface. This is very important for applications such as battery cell packaging, as it can prevent problems such as dust adsorption due to static electricity and electrostatic discharge inside the battery cell.

[0029] Specifically, such as Figure 3 As shown, a second adhesive layer 8 is provided on the top of the aluminum foil layer 4, and the aluminum foil layer 4 is bonded to the black matte layer 5 through the second adhesive layer 8.

[0030] Specifically, such as Figure 3 As shown, the first adhesive layer 3 and the second adhesive layer 8 are both electrolyte-resistant acrylic adhesives, and are uniformly coated on the top of the base layer 2 and the aluminum foil layer 4, respectively.

[0031] In this embodiment, both the first adhesive layer 3 and the second adhesive layer 8 are made of electrolyte-resistant acrylic adhesives. These adhesives have excellent bonding properties and can form a strong connection at the interface of each layer, ensuring a tight connection between the layers, preventing delamination during use, and maintaining the integrity of the aluminum-plastic composite film body 1 structure.

[0032] Working principle: When the aluminum-plastic composite film body 1 is used, the black matte layer 5 achieves a good matting effect, which can effectively prevent light from having an adverse effect on the interior and meet the light-avoidance requirements of applications such as light-sensitive battery cells. The protective layer 6 and antistatic layer 7 not only enhance the wear resistance and corrosion resistance of the surface of the aluminum-plastic composite film body 1, extend the service life of the aluminum-plastic composite film body 1 and maintain the integrity of the appearance, but also effectively eliminate the static electricity generated on the surface of the aluminum-plastic composite film body 1, avoiding problems such as dust adsorption, affecting the performance of battery cells, or even causing safety hazards caused by static electricity. The base layer 2 provides a good mechanical support and dimensional stability foundation for the entire aluminum-plastic composite film body 1. Under the action of the first adhesive layer 3 and the second adhesive layer 8, the strong adhesion between the functional layers is ensured, so that it can maintain structural integrity even in complex environments and when in contact with electrolytes, effectively avoiding interlayer peeling problems. At the same time, the excellent barrier properties of the aluminum foil layer 4 can block the intrusion of external water vapor, oxygen, etc. into the interior, protecting the internal battery cells and other components from external environmental interference.

[0033] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A black matte aluminum-plastic composite film, comprising an aluminum-plastic composite film body (1), characterized in that: The aluminum-plastic composite film body (1) includes a base layer (2), a first adhesive layer (3) is provided on the top of the base layer (2), and an aluminum foil layer (4) is bonded to the top of the first adhesive layer (3). A black matte layer (5) is provided on the top of the aluminum foil layer (4), and a protective layer (6) is provided on the top of the black matte layer (5). An antistatic layer (7) is provided at the bottom of the base layer (2).

2. The black matte aluminum-plastic composite film according to claim 1, characterized in that: The base layer (2) is made of PET film, and the thickness of the base layer (2) is 15-30μm.

3. The black matte aluminum-plastic composite film according to claim 1, characterized in that: The aluminum foil layer (4) is provided with a second adhesive layer (8) on top, and the aluminum foil layer (4) is bonded to the black matte layer (5) through the second adhesive layer (8).

4. The black matte aluminum-plastic composite film according to claim 1, characterized in that: The black matte layer (5) is composed of a black nylon film, and the thickness of the black matte layer (5) is 6-15 μm.

5. The black matte aluminum-plastic composite film according to claim 1, characterized in that: The protective layer (6) is composed of a nano-silica coating and is uniformly coated on the top of the black matte layer (5).

6. The black matte aluminum-plastic composite film according to claim 3, characterized in that: The first adhesive layer (3) and the second adhesive layer (8) are both electrolyte-resistant acrylic adhesives, and are uniformly coated on the top of the base layer (2) and the aluminum foil layer (4), respectively.

7. The black matte aluminum-plastic composite film according to claim 1, characterized in that: The antistatic layer (7) is composed of a polyaniline coating and is uniformly coated on the bottom of the base layer (2).

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