Low-radiation glass and automobile

Abstract

The utility model relates to low-emissivity glass and an automobile, which comprise a first substrate and further comprise a reflecting layer, a second substrate and a reflecting layer, and the heat insulation layer is positioned below the reflecting layer. Compared with the prior art, the low-radiation glass has a good heat insulation effect, the overall high light transmittance of the low-radiation glass can be guaranteed, the situation that the temperature of a roof is too high is improved, and the influence of high temperature on passengers in a vehicle is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to low-radiation glass. Background Art

[0002] Due to the popularity of new energy vehicles, everyone has an extreme demand for the endurance of new energy vehicles. In order to reduce the air resistance coefficient of the car body, reduce the cross-sectional area of ​​the car, and expand the thickness of the battery installation in the chassis, while ensuring the driving space of the driver in the car, the major car manufacturers finally made a compromise on the thickness of the roof. They adopted the solution of skylight glass to reduce the thickness of the roof plate while meeting the light transmittance, and finally achieved the effect of optimizing air resistance. However, with the large-scale promotion of low-drag car bodies, the distance between drivers and passengers and the roof glass is getting closer and closer, and the head feels a strong burning sensation in summer.

[0003] The prior art proposes low-emissivity glass and a method for manufacturing the same, which includes a substrate, a low-emissivity layer and a dielectric layer. The low-emissivity layer is formed on the substrate, and the dielectric layer is formed on the low-emissivity layer. The emissivity is 0.01-0.3, and the visible light transmittance is more than 70%. By setting the low-emissivity layer, this solution can achieve heat insulation or thermal insulation by reflecting most of the infrared radiation.

[0004] However, as skylight glass, it needs to meet a certain light transmittance. Under this condition, the degree of reflection of infrared radiation by the low-emissivity layer will be affected, so it will still bring some heat, resulting in reduced insulation effect. Utility Model Content

[0005] One of the purposes of the utility model is to provide a low-emissivity glass to solve the problem of reduced heat insulation effect caused by the prior art; the second purpose is to provide a car.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A low-emissivity glass comprises a first substrate and further comprises:

[0008] A reflective layer, located below the first substrate;

[0009] The thermal insulation layer is located below the reflective layer.

[0010] According to the above technical means, a reflective layer and a heat-insulating layer are sequentially arranged under the first substrate. The reflective layer can reflect part of the ultraviolet and infrared rays of the light, and then the heat-insulating layer is used to isolate the thermal radiation. Compared with the existing technology, it has a better heat-insulating effect. At the same time, the heat-insulating layer can be prepared with a material with high light transmittance, thereby ensuring the overall light transmittance of the low-emissivity glass.

[0011] Furthermore, a second substrate is provided above the reflective layer, and a heat dissipation layer is provided between the second substrate and the first substrate.

[0012] According to the above technical means, a heat dissipation layer is arranged between the first substrate and the second substrate to further improve the overall thermal insulation.

[0013] Furthermore, a protective layer is provided below the thermal insulation layer.

[0014] Furthermore, the material of the heat insulation layer is made of modified borate.

[0015] Furthermore, the reflective layer is made of zinc oxide, aluminum oxide or Ag.

[0016] Furthermore, the protective layer has a fluorocarbon coating.

[0017] Furthermore, the thickness of the heat insulation layer is 10 to 20 nm.

[0018] Furthermore, the thickness of the reflective layer is 20-40 nm.

[0019] Furthermore, the thickness of the protective layer is 50-80 nm.

[0020] A car comprises the low-emissivity glass mentioned above.

[0021] Beneficial effects of the utility model:

[0022] Compared with the prior art, the utility model has better heat insulation effect, can ensure the overall high light transmittance of the low-emissivity glass, improve the situation of high roof temperature, and reduce the impact of high temperature on passengers in the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of Example 1;

[0024] Figure 2 A schematic structural diagram of embodiment 2.

[0025] Among them, 1 is the first substrate; 2 is the reflective layer; 3 is the heat insulation layer; 4 is the protective layer; 5 is the second substrate; and 6 is the heat dissipation layer. DETAILED DESCRIPTION

[0026] The following will refer to the accompanying drawings and preferred embodiments to illustrate the implementation of the technical solution of the utility model. Those skilled in the art can easily understand other advantages and effects of the utility model from the contents disclosed in this specification. The utility model can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the utility model. It should be understood that the preferred embodiments are only for illustrating the utility model, not for limiting the scope of protection of the utility model.

[0027] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0028] Example 1

[0029] This embodiment provides a low-emissivity glass, which is a single-layer glass. Figure 1 As shown, it includes a first substrate 1, a reflective layer 2, a heat insulating layer 3 and a protective layer 4. The reflective layer 2 is located below the first substrate 1 and can be formed below the first substrate 1. The heat insulating layer 3 is located below the reflective layer 2. The protective layer 4 is located below the heat insulating layer 3.

[0030] The first substrate 1 is made of glass, and its thickness is set according to requirements.

[0031] The reflective layer 2 is located below the first substrate 1 of the glass material and is a light reflecting layer. It mainly reflects part of the infrared and ultraviolet rays, reduces the amount of light entering the car, and plays a partial heat insulation effect. However, in order to meet the transmittance requirements, part of the light is allowed to pass through the reflective layer 2, with a thickness of 20 to 40 nm.

[0032] The heat-insulating layer 3 is located below the reflective layer 2 and has a thickness of 10 to 20 nm. It plays a role in isolating thermal radiation, further reducing the burning sensation brought to passengers in the car by sunlight and improving the passengers' experience. At the same time, in order to meet the requirements of light transmittance, the heat-insulating layer 3 can be made of transparent material, thereby achieving the goal of meeting the requirements of light transmittance while also reducing the impact of thermal radiation in the car, thereby improving the heat-insulating effect.

[0033] The protective layer 4 is located below the heat-insulating layer 3, with a thickness of 50 to 80 nm. It uses a fluorocarbon coating with a thickness of 50 to 80 nm. The surface of the fluorocarbon coating has a lower free energy, so it is not easy to adhere to oil stains, haze, and fingerprints, etc., thus avoiding stains on the glass surface.

[0034] Furthermore, in this embodiment, the reflective layer 2 is made of zinc oxide, aluminum oxide or silver Ag, which plays a role in reflecting ultraviolet rays and infrared rays.

[0035] In this embodiment, the material of the thermal insulation layer 3 is made of modified borate. The modified borate has good infrared isolation and low thermal conductivity performance. As the last coating layer on the protective layer, it has a good thermal insulation effect. The modified borate is specifically a modified barium borate BaB2O4 mixture. The thickness of the thermal insulation layer 3 is 10 to 20 nm, which plays a role in isolating thermal radiation.

[0036] The single-layer glass coating in this embodiment has three layers. The first layer is the reflective layer 2, which is a light reflecting layer made of zinc oxide, aluminum oxide or silver Ag material; the second layer is the heat insulation layer 3, which uses a mixture of modified barium borate BaB2O4; the third layer is the protective layer 4, which uses a fluorocarbon coating.

[0037] The specific process of preparing single-layer glass is as follows:

[0038] S1. Glass cleaning.

[0039] S2. Use vacuum ion sputtering to spray zinc oxide, aluminum oxide, and silver Ag mixed material with a thickness of 20 to 40 nm.

[0040] S3. Use vacuum ion sputtering to spray modified barium borate, thickness: 10 to 20 nm.

[0041] Modified barium metaborate is a white crystalline powder with a density of 3.25-3.35 and a melting point of 900-1050°C. It is slightly soluble in water but easily soluble in hydrochloric acid. The substance is widely used in many industries because of its anti-rust, anti-powdering, high temperature resistance, fire resistance and mildew resistance. In the coatings industry, modified barium metaborate is widely used as part of primers and topcoats. In addition, it is also used in the preparation of products such as ceramics, papermaking, rubber, textiles and plastics.

[0042] Modified barium metaborate is a low-cost anti-rust pigment with anti-rust performance comparable to red lead. It is less toxic and has good dispersibility, mildew resistance, anti-fouling, anti-powdering and flame resistance.

[0043] The preparation process of modified barium metaborate mainly involves mixing and reacting barium chloride and borax. First, barium chloride and borax are mixed in a certain ratio (for example, a molar ratio of 2:1), and then an excess of sodium hydroxide is added. This process needs to be carried out at an appropriate temperature to ensure the effective progress of the reaction. In addition, it has been proposed that borax and sodium hydroxide can be reacted to form sodium metaborate first, and then barium chloride is added. After the reaction is completed, it is necessary to perform a suction filtration process. In this step, a small amount of foam and liquid turbidity may occur. This may be caused by gases or impurities produced by certain chemical reactions.

[0044] Modified barium metaborate is a white crystalline powder with a density of 3.25-3.35 and a melting point of 900-1050°C. It is slightly soluble in water but easily soluble in hydrochloric acid. The substance is widely used in many industries because of its anti-rust, anti-powdering, high temperature resistance, fire resistance and mildew resistance. In the coatings industry, modified barium metaborate is widely used as part of primers and topcoats. In addition, it is also used in the preparation of products such as ceramics, papermaking, rubber, textiles and plastics.

[0045] Modified barium metaborate is a low-cost anti-rust pigment with anti-rust performance comparable to red lead. It is less toxic and has good dispersibility, mildew resistance, anti-fouling, anti-powdering and flame resistance.

[0046] The preparation process of modified barium metaborate mainly involves mixing and reacting barium chloride and borax. First, barium chloride and borax are mixed in a certain ratio (for example, a molar ratio of 2:1), and then an excess of sodium hydroxide is added. This process needs to be carried out at an appropriate temperature to ensure the effective progress of the reaction. In addition, it has been proposed that borax and sodium hydroxide can be reacted to form sodium metaborate first, and then barium chloride is added. After the reaction is completed, it is necessary to perform a suction filtration process. In this step, a small amount of foam and liquid turbidity may occur. This may be caused by gases or impurities produced by certain chemical reactions.

[0047] S4. Use ultrasonic precision spraying of fluorocarbon coating, thickness: 50~80nm.

[0048] S5. Cooling and cutting: The processed laminated glass is cooled by a cooling device to reach room temperature. Then, an automated cutting machine is used to cut the laminated glass into the required size and shape.

[0049] Finally, the production of a single-layer low-emissivity glass (LOW-E) with a single layer of modified borate added is completed.

[0050] Example 2

[0051] This embodiment proposes a low-emissivity glass, which is a double-layer laminated glass. Figure 2As shown, from top to bottom, it includes a first substrate 1, a heat dissipation layer 5, a second substrate 6, a reflective layer 2, a heat insulation layer 3 and a protective layer 4.

[0052] In this embodiment, the first substrate 1 and the second substrate 6 are both glass layers, and a heat dissipation layer 5 is sandwiched between the two for dissipating external infrared radiation. In this embodiment, the heat dissipation layer 5 is made of a mixture of phenyl-4-octyl benzoate and PVB. In this embodiment, the liquid crystal material phenyl-4-octyl benzoate (5PBE) is mixed in the PVB interlayer. Compared with vanadium dioxide, the liquid crystal material phenyl-4-octyl benzoate (5PBE) still has better radiation heat dissipation performance. However, since phenyl-4-octyl benzoate (5PBE) is transparent at -20°C to 80°C, it will not absorb a large amount of light and increase the glass temperature.

[0053] Combined with the heat insulation layer 3, heat radiation is further reduced to achieve the purpose of heat insulation.

[0054] BaB2O4 and the liquid crystal material phenyl-4-octyl benzoate (5PBE) have light transmittance at room temperature. BaB2O4 is a white powder or colorless crystal, and the transparent temperature range of phenyl-4-octyl benzoate (5PBE) is between -20°C and 80°C. BaB2O4 has good heat insulation performance. Therefore, the low-emissivity glass proposed in Example 2 has good heat insulation effect and good light transmittance.

[0055] The reflective layer 2, the heat insulating layer 3 and the protective layer 4 in this embodiment are the same as those described in the first embodiment.

[0056] The preparation process of laminated glass is as follows (laminated glass is based on the process of preparing single-layer glass described in Example 1, but the above process does not perform S5 operation.):

[0057] (1) First, PVB and liquid crystal material phenyl-4-octyl benzoate (5PBE) need to be completed at 200℃~300℃. At this temperature, both materials are in liquid state. Finally, a mixed material is formed. Finally, the temperature is lowered and pressed to form a PVB mixed film.

[0058] (2) Place the cut glass sheets on the workbench, and then place a layer of PVB hybrid film between the two sheets of glass. Make sure that the PVB hybrid film is aligned with the edge of the glass sheet and there are no bubbles or impurities. The 3-layer coating faces outward and does not participate in the lamination process of the laminated glass.

[0059] (3) Lamination and pretreatment: Put the assembled glass sheets into the laminating machine, and the PVB mixed film and glass sheets are firmly bonded through high temperature and pressure. This process is called pretreatment, which can improve the strength and bonding performance of laminated glass.

[0060] (4) Automated processing: After pre-treatment, the laminated glass enters the automated processing line for dust removal, heating, vacuum and pressure treatment. These steps help ensure the quality and performance of the laminated glass.

[0061] (5) Cooling and cutting: The processed laminated glass is cooled by a cooling device to reach room temperature. Then, an automated cutting machine is used to cut the laminated glass into the required size and shape.

[0062] Finally, the production of double-layer low-emissivity glass (LOW-E) is completed.

[0063] The test performance of the top glass designed based on Example 1 and Example 2 is shown in Table 1 as follows:

[0064] Table 1

[0065]

[0066] According to the actual test results, there is no obvious attenuation in visible light transmittance and the gain is obvious.

[0067] Therefore, the low-emissivity glass proposed in Example 1 and Example 2 can have a good heat insulation effect while ensuring the light transmittance.

[0068] Example 3

[0069] This embodiment provides a car, including the low-emissivity glass described in Embodiment 1 or Embodiment 2.

[0070] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A low-emissivity glass comprising a first substrate, characterized in that: Also includes: A reflective layer, located below the first substrate; a thermal insulation layer, located below the reflective layer; The material of the thermal insulation layer is made of modified borate; The thickness of the thermal insulation layer is 10-20 nm; The thickness of the reflective layer is 20-40 nm.

2. The low-emissivity glass according to claim 1, characterized in that: A second substrate is arranged above the reflective layer, and a heat dissipation layer is arranged between the second substrate and the first substrate.

3. The low-emissivity glass according to claim 1, characterized in that: A protective layer is arranged below the heat insulation layer.

4. The low-emissivity glass according to claim 1, characterized in that: The reflective layer is made of zinc oxide, aluminum oxide or Ag.

5. The low-emissivity glass according to claim 3, characterized in that: The protective layer is provided with a fluorocarbon coating.

6. The low-emissivity glass according to claim 3, characterized in that: The thickness of the protective layer is 50-80 nm.

7. A car, characterized in that: The low-emissivity glass comprises the low-emissivity glass according to any one of claims 1 to 6.

Images