Lightweight laminated glass for automobiles and method for manufacturing the same

Abstract

The application discloses light laminated glass for automobile and a preparation method thereof, wherein the light laminated glass for automobile comprises, from inside to outside, a hot-bending thick glass layer, a film layer, a thin flat glass layer and a coating layer. The light laminated glass for automobile comprises, from inside to outside, a hot-bending thick glass layer, a film layer, a thin flat glass layer and a coating layer. The existing hot-bending glass is difficult to control the film thickness and uniformity in the coating and other deep processing process due to the certain curvature, while the thin flat glass is easier to be coated and other deep processed, thereby reducing the technical difficulty in production and the cost. Meanwhile, the light laminated glass for automobile is made of the hot-bending thick glass layer and the thin flat glass layer instead of the traditional two-piece thick hot-bending glass, so that the light weight effect can be achieved, and the method does not need the curvature to be completely consistent, thereby reducing the risk of glass breakage.

Description

Technical Field

[0001] This invention relates to the field of automotive glass technology, and in particular to a lightweight laminated glass for automobiles and its preparation method. Background Technology

[0002] Current automotive laminated glass involves cleaning hot-bent glass, laying PVB film on two pieces of glass, vacuum pre-extraction, and then laminating them in an autoclave. This process requires two hot-bent glass pieces, resulting in a large finished laminated glass and increasing the vehicle's weight. Secondly, processing hot-bent glass through coating or other methods increases the technical difficulty and cost due to the curvature of the hot-bent glass. Moreover, during the thermoforming process, if the curvature of the two traditional hot-bent glass pieces differs, it can easily lead to glass breakage. Summary of the Invention

[0003] The purpose of this invention is to address the problems of existing automotive glass being heavy, having high coating costs, being technically difficult, and being prone to breakage when hot-bent, and to propose a lightweight laminated glass for automobiles and its preparation method.

[0004] The technical solution of the present invention is: a lightweight laminated glass for automobiles, comprising a hot-bent thick glass layer, a film layer, a thin flat glass layer and a coating layer arranged sequentially from the inside to the outside.

[0005] The heat-bent glass layer is physically tempered glass with a thickness of 2-5mm.

[0006] The thickness of the thin flat glass layer is 0.3-1.3 mm.

[0007] The thin flat glass layer is a thin flat glass that has been chemically tempered and corresponds to the dimensions of hot-bent thick glass.

[0008] The coating process for the coating layer occurs after the chemical tempering of the thin flat glass layer.

[0009] The coating layer is a single-layer coating, a double-layer coating, or a combination of multiple functional films.

[0010] A method for preparing lightweight laminated glass for automobiles includes the following steps:

[0011] S1: Thin flat glass is chemically tempered to increase its strength, and then coated on the upper surface;

[0012] S2: Take hot-bent thick glass, film, and processed thin flat glass;

[0013] S3: The hot-bent thick glass, film, and coated thin flat glass are placed in order from the inside to the outside to obtain the assembly;

[0014] S4: Place the assembly between the two silicone plates, and seal the gaps around the two silicone plates with sealing strips;

[0015] S5: Vacuum the sealed silicone plate for a period of time, then put the two silicone plates covering the assembly into an oven for heating and continuous vacuuming.

[0016] S6: Cool the two silicone plates covering the assembly to room temperature, turn off the vacuum pump and open the two silicone plates to obtain lightweight laminated glass for automobiles.

[0017] The present invention has the following beneficial effects by adopting the above technical solution: (1) The lightweight laminated glass for automobiles of the present invention is composed of a hot-bent thick glass layer, a film layer, a thin flat glass layer and a coating layer arranged sequentially from the inside to the outside. Existing hot-bent glass has a certain curvature, which makes it difficult to control the film thickness and uniformity during deep processing such as coating. The thin flat glass of the present invention is easier to carry out deep processing such as coating, reducing the technical difficulty in production and thus reducing costs. At the same time, the lightweight laminated glass for automobiles of the present invention replaces the traditional two-piece hot-bent glass manufacturing method with a hot-bent thick glass layer and a thin flat glass layer, which can achieve the effect of lightweighting and does not require that their curvatures be completely consistent, reducing the risk of glass breakage. Attached Figure Description

[0018] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of traditional automotive glass.

[0021] The labels in the attached diagram are:

[0022] Hot-bent thick glass layer 1, film layer 2, thin flat glass layer 3, coating layer 4, hot-bent thick glass 21, film layer 22, hot-bent thick glass 23. Detailed Implementation

[0023] (Example 1)

[0024] See Figure 1 and Figure 2 This embodiment of a lightweight laminated glass for automobiles includes, from the inside out, a hot-bent thick glass layer 1, a film layer 2, a thin flat glass layer 3, and a coating layer 4.

[0025] Furthermore, the heat-bent glass layer is physically tempered glass with a thickness of 2-5 mm, preferably 3 mm.

[0026] Furthermore, the thickness of the thin flat glass layer 3 is 0.3-1.3 mm, preferably 0.7 mm.

[0027] Preferably, the thin flat glass layer 3 is a medium-aluminum glass that has undergone chemical tempering and corresponds to the size of the hot-bent thick glass.

[0028] Furthermore, the coating process of the coating layer 4 is performed after the chemical tempering of the thin flat glass layer 3.

[0029] Furthermore, the coating layer 4 is a double-layer coating or a combination of multiple functional films, such as a combination of infrared-reducing film and anti-reflective film, which can reduce the temperature inside the vehicle and improve the light transmittance of the sunroof.

[0030] The method for preparing lightweight laminated glass for automobiles in this embodiment includes the following steps:

[0031] S1: Thin flat glass is chemically tempered to increase its strength, and then an anti-infrared and anti-reflection coating is applied to the upper surface.

[0032] S2: Take hot-bent thick glass, film, and processed thin flat glass;

[0033] S3: The hot-bent thick glass, film, and coated thin flat glass are placed in order from the inside to the outside to obtain the assembly;

[0034] S4: Place the assembly between two silicone plates, and seal the gaps around the two silicone plates with sealing strips. The contact surfaces of the two silicone plates and the assembly have a certain shallow pattern.

[0035] S5: Vacuum the sealed silicone plate for a period of time, then put the two silicone plates covering the assembly into an oven and heat them at 150°C for 30 minutes while continuing to vacuum.

[0036] S6: Cool the two silicone plates covering the assembly to room temperature, turn off the vacuum pump and open the two silicone plates to obtain lightweight laminated glass for automobiles.

[0037] The lightweight laminated glass for automobiles in this embodiment consists of a hot-bent thick glass layer 1, a film layer 2, a thin flat glass layer 3, and a coating layer 4 arranged sequentially from the inside out. This not only effectively reduces the overall weight but also facilitates the coating process. Furthermore, it eliminates the need to ensure that the curvature of the hot-bent thick glass layer 1 and the thin flat glass layer 3 is consistent, which greatly reduces the difficulty of production and thus lowers production costs.

[0038] (Comparative Example 1)

[0039] Figure 2 shows a conventional laminated automotive glass, Comparative Example 1 of this patent, comprising, from bottom to top, a hot-bent thick glass 21, an interlayer 22, and another hot-bent thick glass 22. Specifically, the thickness of the hot-bent glass 21 is 3 mm, and the thickness of the hot-bent glass 22 is 2 mm. Comparative Example 1 was prepared using a conventional automotive laminated glass manufacturing method.

[0040] Table 1 Performance Comparison of Implementation Schemes

[0041]

[0042] As shown in Table 1, the lightweight laminated glass for automobiles in Embodiment 1 of this patent is lighter in weight and has passed all relevant mechanical performance tests.

[0043] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lightweight laminated glass for automobiles, characterized in that: The glass comprises, from the inside out, a hot-bent thick glass layer (1), a film layer (2), a thin flat glass layer (3), and a coating layer (4); the method for preparing the lightweight laminated glass for automobiles includes the following steps: S1: Take thin flat glass and use chemical tempering to increase its strength, and then coat its outer surface with a film; S2: Take hot-bent thick glass, film, and processed thin flat glass; S3: The hot-bent thick glass, film, and coated thin flat glass are placed in order from the inside to the outside to obtain the assembly; S4: Place the assembly between the two silicone plates, and seal the gaps around the two silicone plates with sealing strips; S5: Vacuum the inside of the sealed silicone plate for a period of time, then put the two silicone plates covering the assembly into an oven for heating and continuous vacuuming. S6: Cool the two silicone plates covering the assembly to room temperature, turn off the vacuum pump and open the two silicone plates to obtain lightweight laminated glass for automobiles.

2. The lightweight laminated glass for automobiles according to claim 1, characterized in that: The hot-bent thick glass layer is physically tempered glass with a thickness of 2-5mm.

3. The lightweight laminated glass for automobiles according to claim 1, characterized in that: The thickness of the thin flat glass layer (3) is 0.3-1.3 mm.

4. The lightweight laminated glass for automobiles according to claim 1, characterized in that: The thin flat glass layer (3) is a thin flat glass that has been chemically tempered and corresponds to the size of the hot-bent thick glass.

5. The lightweight laminated glass for automobiles according to claim 4, characterized in that: The coating process of the coating layer (4) is performed after the chemical tempering of the thin flat glass layer (3).

6. The lightweight laminated glass for automobiles according to claim 1, characterized in that: The coating layer (4) is a single-layer coating, a double-layer coating, or a combination of multiple functional films.

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