Method and structure for strengthening mechanical strength of glass laminated adhesive film

Abstract

The invention relates to a glass laminated adhesive film, in particular to a glass laminated adhesive film taking ethylene / vinyl acetate (EVA) as main resin. A macromolecular material, such as a plasticizer and the like, is fully mixed with an EVA master batch, and then two macromolecular grid structures originally independently existing are connected by utilizing a polyfunctional group with double bonds, such as acrylate, so that a tough and impact-resistant adhesive film between bearing glass and cover plate glass is formed.

Description

Technical Field

[0001] This application relates to the automotive field, and more specifically to a glass lamination for use in automobiles. Background Technology

[0002] Cars traveling on main roads are protected by the car's outer shell while the driver is inside. However, the strength of the glass components (such as the windshield, side windows, or rear window) is less effective than the car's outer shell, as these areas are frequently exposed to falling objects. Commercially available laminated glass primarily uses PVE, SGP, and EVA. PVB has poor water resistance, requires large amounts of plasticizers during processing, and has poor high-temperature creep resistance. DuPont's SGP is an ionomer with strong mechanical properties, but it is expensive, has poor water resistance, and poor high-temperature creep resistance. Conventional cross-linked EVA materials have insufficient mechanical properties when used in laminated glass, making them unsuitable for certain applications. Ordinary EVA has insufficient mechanical properties because it cannot pass safety performance tests (such as the drop ball test standard GB / T5137.1, a 227g ball dropped from a height of 9140mm; and the drop arrow test standard ANSI / SAE Z26.1-5.9, a 196g~201g arrow dropped from a height of 9140mm). It cannot meet the needs of some specific scenarios, such as as a film for laminated glass in automotive roofs, side windows and rear windshields.

[0003] Due to the above considerations, the industry urgently needs a cost-effective, durable, and inexpensive laminated glass to improve the impact resistance of laminated glass without increasing costs.

[0004] Therefore, it is necessary to develop a novel glass-laminated film structure, which can greatly enhance the impact resistance of glass-laminated glass, thereby providing sufficient protection. Summary of the Invention

[0005] The main objective of this invention is to provide a method for strengthening the mechanical strength of laminated glass films, the technical solution of which is as follows: The method for strengthening the mechanical strength of laminated glass films includes:

[0006] Prepare a resin with multiple molecular chain structures;

[0007] The resin having multiple molecular chain structures is thoroughly mixed with ethylene / vinyl acetate (EVA);

[0008] A bridging agent with double bonds is added to a mixed resin with multiple molecular chain structures and ethylene / vinyl acetate to form a molten resin at a first temperature.

[0009] Cool the molten resin and form a film;

[0010] The adhesive film is placed on a supporting glass.

[0011] Place a cover glass plate on the adhesive film;

[0012] The cover glass, the adhesive film, and the supporting glass are baked at a second temperature.

[0013] At the second temperature, the bridging agent enables the resin having multiple molecular chain structures to form a first network structure with the ethylene / vinyl acetate through the bridging agent.

[0014] Another object of the present invention is that the bridging agent is an acrylate.

[0015] Another object of the present invention is that the resin having multiple molecular chain structures is one of ethylene terpolymer (PTW), thermoplastic polyurethanes (TPU), or maleic anhydride-grafted EVA.

[0016] Another object of the present invention is that the first temperature is 70 to 90 degrees Celsius.

[0017] Another object of the present invention is that the second temperature is 120 to 150 degrees Celsius.

[0018] Another object of the present invention is that the second temperature is 135 + / - 5 degrees Celsius.

[0019] Another objective of this invention is to provide a structure for strengthening the mechanical strength of glass laminated films, characterized by comprising:

[0020] Resins with multiple molecular chain structures;

[0021] Ethylene / vinyl acetate (EVA) can form a first network structure;

[0022] A bridging agent is used to connect the multiple molecular chain structures and the first network structure, thereby creating a connection between the multiple molecular chain structures and the first network structure; and

[0023] A supporting glass and a cover glass are sandwiched between the connected glass having multiple molecular chain structures and a first grid structure.

[0024] Another object of the present invention is that the bridging agent is an acrylate.

[0025] Another object of the present invention is that the resin having multiple molecular chain structures is one of ethylene terpolymer (PTW), thermoplastic polyurethanes (TPU), or maleic anhydride-grafted EVA.

[0026] Compared with the prior art, the structure of the glass laminated film provided by the present invention has the following beneficial effects: by setting a bridging agent, and adding a resin with multiple molecular chain structures, which is one of ethylene terpolymer (PTW), thermoplastic polyurethanes (TPU), or maleic anhydride-grafted EVA, and ethylene / vinyl acetate (EVA) that can form a first grid structure, the multiple molecular chain structures can be linked with the first grid structure to jointly constitute a tough film with high impact resistance. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] Figure 1 A flowchart of the method for strengthening the mechanical strength of laminated glass film provided by the present invention;

[0029] Figure 2 This is a schematic diagram of the mechanical strength structure of the reinforced glass laminated film provided by the present invention. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] See Figure 1 This embodiment provides a method for strengthening the mechanical strength of glass laminated films, the main objective of which is to provide a method for strengthening the mechanical strength of glass laminated films. The technical solution is as follows: The method for strengthening the mechanical strength of glass laminated films includes:

[0032] First, a resin 10 with multiple molecular chain structures is prepared; then, the resin with multiple molecular chain structures is thoroughly mixed with ethylene / vinyl acetate (EVA) 20. The molecular structure of ethylene / vinyl acetate (EVA) itself is a network structure, which will not be described in detail here. To enhance the impact resistance of the film in the application, a bridging agent 30 is added. This bridging agent aims to connect the aforementioned multiple molecular chain resins and the network structure formed by ethylene / vinyl acetate (EVA). Therefore, when selecting a bridging agent, a bridging agent with double bonds must be chosen so that, during use, the aforementioned multiple molecular chain resins and the network structure formed by ethylene / vinyl acetate (EVA) can be connected through highly active double bonds. The bridging agent is an acrylate.

[0033] Subsequently, at a predetermined temperature, approximately 70–90 degrees Celsius, the above mixture is heated to a molten state 40. The molten resin mixture is then cooled to form a film, which is then placed on a supporting glass. A cover glass, in conjunction with the supporting glass, sandwiches the film between them 50. Next, the integrated structure of the cover glass, film, and supporting glass is placed in an environment at a predetermined temperature, approximately 120–150 degrees Celsius, preferably 135 ± 5 degrees Celsius, to promote the bridging agent (acrylate) to connect the multiple molecular chains of resin and the network structure formed by ethylene / vinyl acetate (EVA) 60. Figure 2 As shown.

[0034] Figure 2 The image shows a resin 11, which is one of ethylene terpolymer (PTW), thermoplastic polyurethanes (TPU), or maleic anhydride-grafted EVA. This resin 10 has multiple molecular chains 12. Furthermore, on one side of the resin 11, a network structure 21 formed by ethylene / vinyl acetate (EVA) is shown; this network structure 21 is composed of multiple molecular chain segments 22. As previously mentioned, before the addition of bridging agent 31, the network structure 21 and the molecular chains 12 of the resin 10 are unrelated to each other; however, after the addition of bridging agent 31, the double bonds of the bridging agent 31 can open under suitable conditions and connect with the molecular chains 12 of the resin 10 and the molecular chain segments 22 of the ethylene / vinyl acetate (EVA) network structure 21 to form a more complex, new network structure. This new network structure will have greater toughness and higher impact resistance, and will also meet the safety requirements of laminated automotive glass.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for strengthening the mechanical strength of a glass laminated film, comprising: Prepare a resin with multiple molecular chain structures; The resin having multiple molecular chain structures is thoroughly mixed with ethylene / vinyl acetate (EVA); A bridging agent with double bonds is added to a mixed resin with multiple molecular chain structures and ethylene / vinyl acetate to form a molten resin at a first temperature. Cool the molten resin and form a film; The adhesive film is placed on a supporting glass. Place a cover glass plate on the adhesive film; The cover glass, the adhesive film, and the supporting glass are baked at a second temperature. At the second temperature, the bridging agent enables the resin having multiple molecular chain structures to form a first network structure with the ethylene / vinyl acetate through the bridging agent.

2. The method for strengthening the mechanical strength of laminated glass film according to claim 1, characterized in that: The bridging agent is an acrylate.

3. The method for strengthening the mechanical strength of laminated glass film according to claim 1 or 2, characterized in that: The resin having multiple molecular chain structures is one of ethylene terpolymer (PTW), thermoplastic polyurethanes (TPU), or maleic anhydride-grafted EVA.

4. The method for strengthening the mechanical strength of laminated glass film according to claim 3, characterized in that: The first temperature is 70-90 degrees Celsius.

5. The method for strengthening the mechanical strength of laminated glass film according to claim 3, characterized in that: The second temperature is 120 to 150 degrees Celsius.

6. The method for strengthening the mechanical strength of laminated glass film according to claim 4, characterized in that: The second temperature is 120 to 150 degrees Celsius.

7. The method for strengthening the mechanical strength of laminated glass film according to claim 5, characterized in that: The second temperature is 135 + / - 5 degrees Celsius.

8. The method for strengthening the mechanical strength of laminated glass film according to claim 6, characterized in that: The second temperature is 135 + / - 5 degrees Celsius.

9. A structure for enhancing the mechanical strength of laminated glass film, characterized in that... Includes: Resins with multiple molecular chain structures; Ethylene / vinyl acetate (EVA) can form a first network structure; A bridging agent is used to connect the multiple molecular chain structures and the first grid structure, thereby creating a connection between the multiple molecular chain structures and the first grid structure. as well as A supporting glass and a cover glass are sandwiched between the connected glass having multiple molecular chain structures and a first grid structure.

10. The structure for strengthening the mechanical strength of the laminated glass film according to claim 9, characterized in that: The bridging agent is an acrylate.

11. The structure for strengthening the mechanical strength of the laminated glass film according to claim 9 or 10, characterized in that: The resin having multiple molecular chain structures is one of ethylene terpolymer (PTW), thermoplastic polyurethanes (TPU), or maleic anhydride-grafted EVA.

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