A film and a production line

Abstract

The application relates to a film and a production line, the film comprising a first release film, an acrylic film layer, a thermosetting film layer and a second release film which are sequentially stacked, wherein the acrylic film layer is bonded to the thermosetting film layer, the first release film is attached to the acrylic film layer, and the second release film is attached to the thermosetting film layer. Through the film, the acrylic film layer and the thermosetting film layer are two different glue systems, which can better meet the bonding requirements of two different materials of the adherends in the market and overcome the poor adaptability of a single glue system in the prior art.

Description

Technical Field

[0001] This application relates to the field of adhesive film technology, and more particularly to an adhesive film and a production line. Background Technology

[0002] Thermosetting adhesive film is a functional film layer in which a release film is adhered to at least one side of the thermosetting adhesive film layer. After the release film is removed and the thermosetting adhesive film layer is adhered to the substrate, the thermosetting adhesive film layer is cured by heating to form a three-dimensional cross-linked network structure. This functional film layer forms an adhesive with the substrate.

[0003] However, the applicant of this application found that a single adhesive system is difficult to meet the needs of the market. For bonding different materials (such as metal and plastic, glass and plastic, ceramic and plastic, etc.), the adaptability of a single thermosetting adhesive film layer is poor. Utility Model Content

[0004] In view of the above problems, embodiments of this application provide an adhesive film and a production line that overcome or at least partially solve the above problems.

[0005] According to one aspect of the present application, an adhesive film is provided, comprising a first release film, an acrylic film layer, a thermosetting adhesive film layer, and a second release film stacked sequentially, wherein the acrylic film layer is bonded to the thermosetting adhesive film layer, the first release film is adhered to the acrylic film layer, and the second release film is adhered to the thermosetting adhesive film layer.

[0006] In one alternative, the release force of the first release film is less than that of the second release film.

[0007] In one alternative, the release force of the first release film is 1 gf / inch to 5 gf / inch, and the release force of the second release film is 20 gf / inch to 30 gf / inch.

[0008] In one alternative embodiment, the thermosetting adhesive film layer is any one of an acrylic thermosetting adhesive film layer, a polyurethane thermosetting adhesive film layer, an epoxy thermosetting adhesive film layer, a polyester thermosetting adhesive film layer, and a phenolic thermosetting adhesive film layer.

[0009] In one alternative approach, the thickness of the first release film is 25 μm or 36 μm.

[0010] In one alternative, the thickness of the second release film is 50 μm or 75 μm.

[0011] In one alternative approach, the thickness of the acrylic film layer is 5 μm to 10 μm.

[0012] In one alternative approach, the thickness of the thermosetting adhesive film layer is 5 μm to 50 μm.

[0013] In one alternative embodiment, the adhesive peel strength of the acrylic film layer is between 1500 gf / inch and 2000 gf / inch.

[0014] According to one aspect of the embodiments of this application, a production line is provided, including the aforementioned adhesive film.

[0015] The beneficial effects of this application's embodiments are as follows: An adhesive film is provided, comprising a first release film, an acrylic adhesive film layer, a thermosetting adhesive film layer, and a second release film stacked sequentially. The acrylic adhesive film layer is bonded to the thermosetting adhesive film layer, the first release film is adhered to the acrylic adhesive film layer, and the second release film is adhered to the thermosetting adhesive film layer. This adhesive film, with its two different adhesive systems (acrylic and thermosetting), can better meet the bonding needs of two different materials in the market, overcoming the poor compatibility of existing single adhesive systems.

[0016] Furthermore, acrylic adhesive films generally have stronger peel strength than thermosetting adhesive films. Therefore, during the bonding process, acrylic adhesive films provide a stronger initial adhesion, while thermosetting adhesive films offer a durable and stable bond after curing, ensuring the reliability of the bonded objects in various environments. The introduction of acrylic adhesive films enhances the overall bonding reliability of the adhesive film to the bonded objects.

[0017] In addition, the thermosetting adhesive film layer has excellent weather resistance, moisture resistance, and UV (ultraviolet) resistance, ensuring that the film maintains good adhesion performance even in harsh environments. Attached Figure Description

[0018] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0019] Figure 1 This is a schematic diagram of the adhesive film provided in the embodiments of this application.

[0020] The labels in the attached diagram are as follows:

[0021] 100. Adhesive film;

[0022] 10. First release film; 20. Acrylic adhesive film layer; 30. Thermosetting adhesive film layer; 40. Second release film. Detailed Implementation

[0023] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0025] Please see Figure 1 This application provides an adhesive film 100, comprising a first release film 10, an acrylic adhesive film layer 20, a thermosetting adhesive film layer 30, and a second release film 40 stacked sequentially. The acrylic adhesive film layer 20 is bonded to the thermosetting adhesive film layer 30, the first release film 10 is adhered to the acrylic adhesive film layer 20, and the second release film 40 is adhered to the thermosetting adhesive film layer 30. This adhesive film 100 employs a dual-film composite structure of the acrylic adhesive film layer 20 and the thermosetting adhesive film layer 30. The combined application of two different adhesive systems significantly improves the adaptability of the adhesive film 100 to various materials, effectively solving the problem of limited applicability of a single adhesive system.

[0026] Furthermore, the acrylic adhesive film layer 20 possesses excellent adhesive-peel strength, providing a strong and rapid adhesion effect during the bonding process; while the thermosetting adhesive film layer 30 exhibits excellent weather resistance, moisture resistance, and UV resistance after curing, ensuring that the adhesive film 100 maintains stable and high-performance adhesion in harsh environments. The synergistic effect of the acrylic adhesive film layer 20 and the thermosetting adhesive film layer 30 achieves a balance between ease of operation and long-term reliability for the adhesive film 100.

[0027] Understandably, the introduction of the acrylic film layer 20 not only improves the initial operating efficiency and overall bonding strength of the film 100, but its complementary effect with the thermosetting film layer 30 also ensures the excellent reliability of the bonded structure under various complex working conditions.

[0028] The acrylic film layer 20 is made using acrylic adhesives from the prior art, such as the acrylic adhesives disclosed in CN 115678466 A, prepared by the raw materials and formulations, for example, by coating.

[0029] The thermosetting adhesive film layer 30 is made using thermosetting adhesives in the prior art, such as those prepared by the raw materials and formulations of the thermosetting adhesive layer disclosed in CN 114058313 B, for example, by coating.

[0030] During the formation of the adhesive film 100, a heat-resistant acrylic adhesive film layer 20 is laminated onto any side of the thermosetting adhesive film layer 30 by heating.

[0031] The heating temperature is between 40℃ and 60℃. Within this temperature range, the acrylic film layer 20 will not undergo any performance changes, while the thermosetting film layer 30 will exhibit a certain degree of weak tack. A 1 kgf / cm² application is performed during the lamination process. 2 Up to 5 kgf / cm 2 The pressure not only allows the acrylic film layer 20 and the thermosetting film layer 30 to adhere tightly, but also allows the acrylic acid in the acrylic film layer 20 to react with the substances in the thermosetting film layer 30 while being heated, thereby obtaining a stronger interfacial adhesion.

[0032] It is worth noting that in some embodiments, the release force of the first release film 10 is less than that of the second release film 40. When using the adhesive film 100, the first release film 10 is removed first, the acrylic adhesive film layer 20 is adhered to the surface of one of the objects to be bonded, the second release film 40 is removed, the thermosetting adhesive film layer 30 is adhered to the surface of the other object to be bonded, and the other object to be bonded is hot-pressed to allow the thermosetting adhesive film layer 30 to cure rapidly, forming a strong bond to the other object to be bonded.

[0033] The hot-pressing temperature and time can be adjusted according to the specific material and bonding requirements to ensure that the thermosetting adhesive film layer 30 is fully cured and achieves the best bonding effect. For example, the temperature can be selected from 130℃ to 180℃, and the hot-pressing time can be controlled within the range of 10 seconds to 30 seconds. As the temperature increases, the hot-pressing time can be shortened accordingly to ensure that the adhesive film 100 cures quickly at high temperatures, while avoiding performance degradation caused by overheating.

[0034] By limiting the release force of the first release film 10 to be less than that of the second release film 40, the first release film 10 can be easily removed when using the adhesive film 100, avoiding bubble formation and uneven adhesion, ensuring that the acrylic adhesive film layer 20 adheres tightly to the surface of the object being bonded, and improving the initial bonding quality. Subsequently, the appropriate release force of the second release film 40 ensures a stable transition of the thermosetting adhesive film layer 30 during the hot pressing process, further optimizing the uniformity and firmness of the overall adhesive structure.

[0035] In some embodiments, the acrylic film layer 20 is resistant to a temperature of 180°C, which ensures the performance of the acrylic film layer 20 and guarantees the bonding stability of the acrylic film layer 20 to the adhered object during hot pressing.

[0036] It is worth noting that in some embodiments, the release force of the first release film 10 is 1 gf / inch to 5 gf / inch, and the release force of the second release film 40 is 20 gf / inch to 30 gf / inch. Through this design, the release force of the first release film 10 is less than that of the second release film 40.

[0037] In some embodiments, the first release film 10 is a high-temperature resistant release film that can withstand a high temperature of 180°C.

[0038] In some embodiments, the second release film 40 is a high-temperature resistant release film that can withstand a high temperature of 180°C.

[0039] It is worth noting that, in some embodiments, the thermosetting adhesive film layer 30 is any one of an acrylic thermosetting adhesive film layer, a polyurethane thermosetting adhesive film layer, an epoxy thermosetting adhesive film layer, a polyester thermosetting adhesive film layer, and a phenolic thermosetting adhesive film layer.

[0040] Among them, the acrylic thermosetting adhesive film layer is an existing technology, such as the acrylic thermosetting adhesive layer used in CN 209462707 U.

[0041] The polyurethane thermosetting adhesive film layer is prepared using existing polyurethane thermosetting adhesives, such as the raw materials and formulations of the thermosetting adhesive layer disclosed in CN114058313 B, for example, by coating.

[0042] Among them, the epoxy thermosetting adhesive film layer is an existing technology, such as the adhesive layer composed of epoxy thermosetting adhesive in CN 210519001 U.

[0043] Among them, the polyester thermosetting adhesive film layer is a film layer prepared using polyester resin as raw material in the existing technology.

[0044] Among them, the phenolic thermosetting adhesive film layer is a film layer prepared using existing technology by utilizing the properties of phenolic resin.

[0045] It is worth noting that in some embodiments, the thickness of the first release film 10 is 25 μm or 36 μm.

[0046] It is worth noting that in some embodiments, the thickness of the second release film 40 is 50 μm or 75 μm.

[0047] It is worth noting that in some embodiments, the thickness of the acrylic film layer 20 is 5μm to 10μm. This design ensures the adhesion effect of the acrylic film layer 20 to the thermosetting adhesive film layer 30 and the object being adhered.

[0048] It is worth noting that in some embodiments, the thickness of the thermosetting adhesive film layer 30 is 5μm to 50μm. This design ensures the adaptability and reliability of the thermosetting adhesive film layer 30 in different application scenarios.

[0049] It is worth noting that, in some embodiments, the adhesive peel force of the acrylic film layer 20 is 1500 gf / inch to 2000 gf / inch. This limitation ensures the high adhesive performance of the acrylic film layer 20. The adhesive peel force of the acrylic film layer 20, 1500 gf / inch to 2000 gf / inch, refers to the range of force required for the acrylic film layer 20 to separate from the adhered object in a peel test.

[0050] This application also provides an embodiment of a production line, which includes the adhesive film 100. For the specific structure and function of the adhesive film 100, please refer to the above embodiments; they will not be repeated here.

[0051] It should be noted that while preferred embodiments of this application are provided in the specification and accompanying drawings, this application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this application; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this application. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A film, characterized in that, include: A first release film, an acrylic film layer, a thermosetting adhesive film layer, and a second release film are stacked sequentially, wherein the acrylic film layer is bonded to the thermosetting adhesive film layer, the first release film is attached to the acrylic film layer, and the second release film is attached to the thermosetting adhesive film layer.

2. The adhesive film according to claim 1, characterized in that, The release force of the first release film is less than that of the second release film.

3. The adhesive film according to claim 2, characterized in that, The release force of the first release film is 1 gf / inch to 5 gf / inch, and the release force of the second release film is 20 gf / inch to 30 gf / inch.

4. The adhesive film according to claim 1, characterized in that, The thermosetting adhesive film layer is any one of acrylic thermosetting adhesive film layer, polyurethane thermosetting adhesive film layer, epoxy thermosetting adhesive film layer, polyester thermosetting adhesive film layer and phenolic thermosetting adhesive film layer.

5. The adhesive film according to claim 1, characterized in that, The thickness of the first release film is 25 μm or 36 μm.

6. The adhesive film according to claim 1, characterized in that, The thickness of the second release film is 50 μm or 75 μm.

7. The adhesive film according to any one of claims 1-6, characterized in that, The thickness of the acrylic film layer is 5 μm to 10 μm.

8. The adhesive film according to any one of claims 1-6, characterized in that, The thickness of the thermosetting adhesive film layer is 5 μm to 50 μm.

9. The adhesive film according to any one of claims 1-6, characterized in that, The adhesive peel strength of the acrylic film layer is 1500 gf / inch to 2000 gf / inch.

10. A production line, characterized in that, Includes the adhesive film as described in any one of claims 1-9.

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