Laying method of micro-metal mesh in glass interlayer and micro-metal mesh film

Abstract

The present application relates to a method for laying a micro-metal mesh in a glass interlayer and a micro-metal mesh film. The laying method comprises the following steps: forming an adhesion coating on a PET substrate; placing a micro-metal mesh on the adhesion coating, and the PET substrate, the adhesion coating and the micro-metal mesh form a micro-metal mesh film; transferring the micro-metal mesh of the micro-metal mesh film onto a first organic interlayer film, wherein the adhesion force between the micro-metal mesh and the adhesion coating is less than the adhesion force between the micro-metal mesh and the first organic interlayer film; forming the first organic interlayer film between the laminated glass. The present application adds an adhesion coating between the PET substrate and the micro-metal mesh, so that the releasable performance between the micro-metal mesh and the PET substrate is increased, and the micro-metal mesh is transferred to the first organic interlayer film, so that the relative structure of the micro-metal mesh and the first organic interlayer film is uniform, and then the first organic interlayer film is laminated to the laminated glass, and the optical performance of the final product is stable without optical deformation.

Description

Technical Field

[0001] The present application relates to a method for laying a micro-metal mesh, and in particular to a method for laying a micro-metal mesh in a glass interlayer and a micro-metal mesh film. Background Art

[0002] The technology of laying metal mesh in ordinary glass interlayer to make the glass have electromagnetic shielding performance is now mature, but the metal mesh laid by the existing laying method is a metal grid visible to the human eye, which has a great visual impact. In order to solve the above problem, the method adopted in the prior art is to replace the metal grid with a micro-metal mesh. The micro-metal mesh is a micron-level or nano-level grid made on a PET film as a substrate. The effect of the metal mesh on vision is solved by the principle that the extremely fine mesh has little effect on optics.

[0003] In the process of implementing this application, the applicant found that laying the micro-metal mesh in the glass interlayer still has the following problems:

[0004] 1. During the lamination process of hyperbolic glass, the micro-metal mesh based on PET film will produce serious optical distortion due to the poor ductility of PET film and the inability to achieve hyperbolic shape;

[0005] 2. PET film materials are prone to aging and delamination when laminated into organic material interlayers, thus affecting durability performance. Summary of the invention

[0006] The embodiments of the present application provide a method for laying a micro-metal mesh in a glass interlayer and a micro-metal mesh film, which solve the problem that the existing micro-metal mesh produces serious optical distortion and affects the durability performance when laid in the glass interlayer.

[0007] To solve the above technical problems, this application is implemented as follows:

[0008] In a first aspect, a method for laying a micro-metal mesh in a glass interlayer is provided, which comprises the following steps: forming an adhesion coating on a PET substrate; arranging the micro-metal mesh on the adhesion coating, wherein the PET substrate, the adhesion coating and the micro-metal mesh form a micro-metal mesh film; transferring the micro-metal mesh of the micro-metal mesh film onto a first organic interlayer film, wherein the adhesion force between the micro-metal mesh and the adhesion coating is less than the adhesion force between the micro-metal mesh and the first organic interlayer film; and forming the first organic interlayer film between the laminated glasses.

[0009] In a first possible implementation of the first aspect, the transfer of the micro-metal mesh includes the following steps: laying a first isolation film on a first substrate; laying a first organic interlayer film on the first isolation film; placing the micro-metal mesh film on the first organic interlayer film, and making the micro-metal mesh face the first organic interlayer film; laying a second isolation film on the micro-metal mesh film; pressing the second substrate onto the second isolation film to form a pre-assembled sheet; and vacuum pre-pressing and demolding the pre-assembled sheet in sequence to obtain a first organic interlayer film printed with a micro-metal mesh.

[0010] In combination with the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the first substrate and the second substrate are made of flat glass.

[0011] In combination with the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, when vacuum pre-pressing the pre-assembled sheets, the pre-assembled sheets are first evacuated and then placed in an oven for pre-pressing.

[0012] In combination with the first possible implementation method of the first aspect, in a fourth possible implementation method of the first aspect, when the pre-assembled sheet is demolded, after removing the first substrate, the second substrate, the first isolation film and the second isolation film, the PET substrate of the micro-metal mesh film is peeled off to reach the first organic interlayer film printed with the micro-metal mesh.

[0013] In a fifth possible implementation manner of the first aspect, the first organic interlayer film includes a polyurethane material or a polyvinyl butyral material.

[0014] In a sixth possible implementation manner of the first aspect, forming the first organic interlayer film between the laminated glasses comprises the following steps:

[0015] Laying multiple layers of second organic interlayer film between two sheets of glass;

[0016] The first organic interlayer film is arranged between two layers of the second organic interlayer film, so that the two sheets of glass, the multiple layers of the second organic interlayer film and the first organic interlayer film form a composite sheet;

[0017] The sheets are heat pressed together to obtain laminated glass with a micro-metal mesh.

[0018] In combination with the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, each piece of glass uses curved glass.

[0019] In combination with the first possible implementation manner of the first aspect, in an eighth possible implementation manner of the first aspect, the electrical connection of the micro-metal mesh is led out of the organic interlayer by welding or bonding to achieve electrical grounding of the micro-metal mesh.

[0020] In a second aspect, a micro-metal mesh film is provided, which includes: a PET substrate; an adhesion coating disposed on the PET substrate; a micro-metal mesh disposed on the adhesion coating, wherein the adhesion force between the micro-metal mesh and the adhesion coating is smaller than the adhesion force between the micro-metal mesh and the organic interlayer film to be printed.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The present invention discloses a method for laying a micro-metal mesh in a glass interlayer and a micro-metal mesh film, wherein an adhesion coating is added between a PET substrate and the micro-metal mesh, so that the releasability between the micro-metal mesh and the PET substrate is increased, and the micro-metal mesh is transferred to a first organic interlayer film, so that the relative structures of the micro-metal mesh and the first organic interlayer film are uniform, and then the first organic interlayer film is laminated to the laminated glass. During the lamination process, the micro-metal mesh can be provided with stable and uniform ductility, so that the micro-metal mesh attached to the first organic interlayer film can be stably and uniformly extended to a hyperbolic structure, so that the optical performance of the final product is stable and no optical deformation occurs, thereby solving the optical problem of the micro-metal mesh during the hyperbolic lamination process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 This is a schematic diagram of the steps of a method for laying a micro-metal mesh in a glass interlayer according to an embodiment of the present application;

[0025] Figure 2 is a schematic diagram of a micro-metal mesh film according to an embodiment of the present application;

[0026] Figure 3 is a schematic diagram of a pre-assembled sheet according to an embodiment of the present application;

[0027] Figure 4 is a schematic diagram of a micro-metal mesh and a first organic interlayer film according to an embodiment of the present application;

[0028] Figure 5 Schematic diagram of laminated glass according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0030] With regard to laying micro-metal mesh in glass interlayers, the existing method is usually to laminate the micro-metal mesh with PET film as the base material between the hyperbolic glass. This will cause severe optical distortion due to the poor ductility of the PET film and the inability to achieve hyperbolic properties. At the same time, the PET film material is prone to aging and delamination when laminated into the organic material interlayer, thus affecting the durability performance.

[0031] The micro-metal mesh film of the present application adds an adhesion coating between the PET substrate and the micro-metal mesh, so as to increase the releasability between the micro-metal mesh and the PET substrate. The method for laying the micro-metal mesh in the glass interlayer of the present application then transfers the micro-metal mesh to the organic interlayer film for lamination, thereby solving the optical problems of the micro-metal mesh during the hyperbolic lamination process.

[0032] See also Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of the steps of a method for laying a micro-metal mesh in a glass interlayer according to an embodiment of the present application. Figure 2 Schematic diagram of a micro-metal mesh film of an embodiment of the present application. As shown in the figure, the laying method S of the micro-metal mesh in the glass interlayer includes the following steps S1 to S4. First, the micro-metal mesh film 1 is prepared to increase the release performance between the micro-metal mesh 4 and the PET substrate 2. The method for preparing the micro-metal mesh film 1 is shown in the following steps S1 to S2.

[0033] In step S1, an adhesion coating 3 is formed on the PET substrate 2. Specifically, the material of the adhesion coating 3 is coated on the PET substrate 2 to form the adhesion coating 3. Then in step S2, a micro-metal mesh 4 is arranged. The micro-metal mesh 4 is arranged on the adhesion coating 3, and the PET substrate 2, the adhesion coating 3 and the micro-metal mesh 4 form a micro-metal mesh 4 film. The bonding force between the micro-metal mesh 4 and the adhesion coating 3 is smaller than the bonding force between the micro-metal mesh 4 and the organic interlayer film to be transferred (i.e., the first organic interlayer film 5 described below), thereby increasing the releasability between the micro-metal mesh 4 and the PET substrate 2.

[0034] Next, please also refer to Figure 3 and Figure 4 As shown, Figure 3 is a schematic diagram of a pre-assembled sheet according to an embodiment of the present application, Figure 4 Schematic diagram of a micro-metal mesh and a first organic interlayer film according to an embodiment of the present application. As shown in the figure, the micro-metal mesh 4 of the micro-metal mesh film 1 prepared above is transferred to the first organic interlayer film 5 to remove the PET substrate 2. The method of transferring the micro-metal mesh 4 is shown in the following step S3.

[0035] In step S3, the micro-metal mesh 4 is transferred. The micro-metal mesh 4 of the micro-metal mesh 4 film is transferred onto the first organic interlayer film 5. Specifically, the first isolation film 42 and the first organic interlayer film 5 are sequentially laid on the first substrate 41, and the first isolation film 42 needs to have no adhesion to the first substrate 41 and the first organic interlayer film 5. Then the micro-metal mesh 4 film is placed on the first organic interlayer film 5, and the micro-metal mesh 4 is facing the first organic interlayer film 5, so as to facilitate the transfer of the micro-metal mesh 4 to the first organic interlayer film 5. The first organic interlayer film 5 includes polyurethane material or polyvinyl butyral material, etc., which are suitable for glass interlayer materials.

[0036] As described above, a second isolation film 43 is laid on the micro-metal mesh film 1, and a second substrate 44 is pressed on the second isolation film 43 to form a pre-assembled sheet 45. The first substrate 41 and the second substrate 44 use flat glass, and the second isolation film 43 needs to have no adhesion to the second isolation film 43 and the micro-metal mesh film 1. Then, the pre-assembled sheet 45 is evacuated and placed in an oven for vacuum pre-pressing. Finally, the pre-assembled sheet 45 is demolded, that is, the first substrate 41, the second substrate 44, the first isolation film 42 and the second isolation film 43 are removed, so as to obtain a first organic interlayer film 5 embossed with the micro-metal mesh 4, as shown in FIG. Figure 4 shown.

[0037] Finally, please also refer to Figure 5 As shown, Figure 5 Schematic diagram of laminated glass of an embodiment of the present application. As shown in the figure, the first organic interlayer film 5 obtained above is laminated between two sheets of glass to achieve the purpose of laying a micro-metal mesh in the glass interlayer. The lamination method of the first organic interlayer film 5 is shown in the following step S4.

[0038] In step S4, the first organic interlayer film 5 is laminated. The first organic interlayer film 5 is formed between the laminated glasses. Specifically, multiple layers of the second organic interlayer film 7 are laid between two sheets of glass 6, the first organic interlayer film 5 is arranged between two layers of the second organic interlayer film 7, and the electrical connection of the micro-metal mesh 4 is led out of the organic interlayer by welding or bonding to achieve electrical grounding of the micro-metal mesh 4.

[0039] As described above, two sheets of glass 6, multiple layers of second organic interlayer film 7 and first organic interlayer film 5 form a laminate. The second organic interlayer film 7 can be made of the same material as the first organic interlayer film 5, and each sheet of glass 6 uses curved glass, but is not limited thereto. The laminate is sent to a hot pressing device for hot pressing to complete the interlayer work of the product, thereby obtaining a finished product, that is, a laminated glass 8 with a micro-metal mesh 4 laid thereon.

[0040] The laying method S of the micro-metal mesh in the glass interlayer of this embodiment is to transfer the PET substrate 2 of the micro-metal mesh 4 into the first organic interlayer film 5, so that the film around the metal mesh 4 is fused during the subsequent hot pressing process, thereby achieving super strong bonding performance between the micro-metal mesh 4 and the second organic interlayer film 7, which can greatly improve the aging durability of the laminated glass 8, and at the same time solve the influence of the PET substrate 2 in the organic interlayer on optics and durability, and removing the PET substrate 2 can also improve the light transmittance of the overall structure of the laminated glass 8.

[0041] In summary, the present application provides a method for laying a micro-metal mesh in a glass interlayer and a micro-metal mesh film, which adds an adhesion coating between the PET substrate and the micro-metal mesh to increase the releasability between the micro-metal mesh and the PET substrate, and realizes the transfer of the micro-metal mesh to the first organic interlayer film, so that the relative structure of the micro-metal mesh and the first organic interlayer film is uniform, and then the first organic interlayer film is laminated to the laminated glass, so that the obtained laminated glass does not contain the PET substrate.

[0042] At the same time, the laminated glass can provide the micro-metal mesh with stable and uniform ductility during the lamination process, so that the micro-metal mesh attached to the first organic interlayer film can be stably and evenly extended to the hyperbolic structure, so that the optical performance of the final product is stable and no optical deformation occurs, thereby solving the optical problems of the micro-metal mesh during the hyperbolic lamination process.

[0043] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0044] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A method for laying a micro-metal mesh in a glass interlayer, characterized in that: The following steps are involved: Forming an adhesion coating on a PET substrate; The micro-metal mesh is arranged on the adhesive coating, and the PET substrate, the adhesive coating and the micro-metal mesh form a micro-metal mesh film; Transferring the micro-metal mesh of the micro-metal mesh film onto a first organic interlayer film, wherein the bonding force between the micro-metal mesh and the adhesive coating is smaller than the bonding force between the micro-metal mesh and the first organic interlayer film; forming the first organic interlayer film between the laminated glasses; The transfer printing of the micro-metal mesh includes the following steps: Laying a first isolation film on the first substrate; Laying a first organic interlayer film on the first isolation film; Placing the micro-metal mesh film on the first organic interlayer film, with the micro-metal mesh facing the first organic interlayer film; Laying a second isolation film on the micro-metal mesh film; pressing a second substrate onto the second isolation film to form a pre-laminated sheet; The pre-assembled sheet is sequentially subjected to vacuum pre-pressing and demolding to obtain the first organic interlayer film embossed with the micro-metal mesh, wherein when the pre-assembled sheet is subjected to vacuum pre-pressing, the pre-assembled sheet is first evacuated and then placed in an oven for pre-pressing, and when the pre-assembled sheet is demolded, the first substrate, the second substrate, the first isolation film and the second isolation film are removed, and then the PET substrate of the micro-metal mesh film is uncovered to obtain the first organic interlayer film embossed with the micro-metal mesh; The step of forming the first organic interlayer film between the laminated glasses comprises the following steps: Laying multiple layers of second organic interlayer film between two sheets of glass; The first organic interlayer film having the micro-metal mesh transferred thereon is arranged between two layers of the second organic interlayer film, so that the two sheets of glass, the multiple layers of the second organic interlayer film and the first organic interlayer film form a composite sheet; The laminated sheets are hot pressed to obtain the laminated glass with the micro-metal mesh laid thereon.

2. The method for laying micro-metal mesh in glass interlayer according to claim 1, characterized in that: Flat glass is used as the first substrate and the second substrate.

3. The method for laying micro-metal mesh in glass interlayer according to claim 1, characterized in that: The first organic interlayer film comprises polyurethane material or polyvinyl butyral material.

4. The method for laying micro-metal mesh in glass interlayer according to claim 1, characterized in that: Each of the glass sheets uses curved glass.

5. The method for laying micro-metal mesh in glass interlayer according to claim 1, characterized in that: When the sheets are assembled, the electrical connection of the micro-metal mesh is led out of the organic interlayer by welding or bonding to achieve electrical grounding of the micro-metal mesh.

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