Car window glass and vehicles

Abstract

The present application provides a vehicle window glass and a vehicle. The vehicle window glass includes laminated glass and an information collection area. The laminated glass includes an outer glass plate, an intermediate layer, and an inner glass plate. The intermediate layer is sandwiched between the outer and inner glass plates. The outer glass plate has a first surface and a second surface disposed in opposite directions, and the inner glass plate has a third surface and a fourth surface disposed in opposite directions. An anti-reflection film is provided on the fourth surface of the inner glass plate. The anti-reflection film is adhered to the fourth surface of the inner glass plate via an adhesive layer. The anti-reflection film includes a substrate and an anti-reflection film of a laminated substrate. The adhesive layer includes a middle portion and an edge portion. The edge portion is connected to the periphery of the middle portion. The edge portion uses OCA optical adhesive, and the middle portion uses SCA optical adhesive. The present application not only improves the transmittance of the vehicle window glass, but also ensures that the adhesive layer connecting the anti-reflection film and the vehicle glass is uniformly disposed after curing, thereby avoiding optical distortion of the vehicle window glass.

Description

Technical Field

[0001] The present application relates to the technical field of glass products, in particular to vehicle window glass and vehicles. Background Art

[0002] The automotive driving field is currently developing towards assisted driving, autonomous driving, and even unmanned driving. To support the functions of information collection systems such as LiDAR and infrared cameras, vehicle window glass must have sufficiently high signal transmittance. Currently, the mainstream signal is near-infrared light. Applying an anti-reflection coating on the inside of the vehicle window glass can reduce signal reflection and increase signal transmittance. Existing technology typically coats the anti-reflection coating directly on the vehicle window glass, but this requires a vacuum coating chamber large enough to accommodate the window glass, significantly increasing the coating cost.

[0003] Typically, a substrate with an antireflection coating (also known as an AR film) is bonded to automotive glass via adhesive to improve the window's transmittance to optical signals. While existing liquid adhesives can meet the required near-infrared light transmittance, their fluidity can easily lead to uneven adhesive layer thickness, resulting in severe light distortion in the area of ​​the window glass covered by the AR film, failing to meet automotive regulations.

[0004] Liquid adhesives are being replaced with solid adhesives. Optically Clear Adhesive (OCA) is a commonly used solid adhesive on the market. OCA offers advantages such as high transmittance, strong adhesion, excellent aging resistance, and easy lamination. However, the production process and cost of OCA are relatively high, and its strong adhesion prevents rework during the lamination process, which can lead to a decrease in yield. SCA (Solid Optically Clear Adhesive) is a solid, UV-cured optical adhesive with excellent light transmittance and significantly greater bonding performance after curing than OCA. Because SCA exhibits less adhesion before lamination, rework is easier and significantly reduces defective rates. Therefore, SCA can be used to replace OCA. Currently, SCA exhibits a certain degree of fluidity during hot-press lamination, resulting in uneven thickness of the optical adhesive layer, causing optical distortion in the vehicle window glass and compromising the transmission quality of the optical signal. Summary of the Invention

[0005] The purpose of this application is to provide a vehicle window glass that can improve the transmittance of the vehicle window glass to optical signals, and at the same time can make the colloid connecting the anti-reflection film and the automobile glass uniformly arranged after curing, thereby avoiding optical distortion of the vehicle window glass.

[0006] A first aspect of the present application provides a vehicle window glass, applied to a vehicle, comprising laminated glass and an information collection area, wherein the laminated glass comprises an outer glass plate, an intermediate layer, and an inner glass plate, wherein the intermediate layer is sandwiched between the outer glass plate and the inner glass plate, wherein the outer glass plate has a first surface and a second surface disposed opposite to each other, with the second surface facing the intermediate layer, and the inner glass plate has a third surface and a fourth surface disposed opposite to each other, with the third surface facing the intermediate layer;

[0007] An antireflection sheet is provided on the fourth surface of the inner glass sheet, and the antireflection sheet is adhered to the fourth surface of the inner glass sheet via an adhesive layer. The antireflection sheet includes a substrate and an antireflection film laminated with the substrate. The adhesive layer adheres the substrate to the fourth surface of the inner glass sheet along the thickness direction of the laminated glass. The orthographic projection of the antireflection film on the information collection area covers the information collection area.

[0008] The adhesive layer includes a middle portion and an edge portion, the edge portion is connected to the periphery of the middle portion, the edge portion is OCA optical adhesive, and the middle portion is SCA optical adhesive.

[0009] In a possible implementation, the OCA optical adhesive is an acrylic adhesive.

[0010] In one possible embodiment, the SCA optical adhesive in the middle part includes the following components in parts by weight: 65 to 75 parts of EVA resin, 15 to 25 parts of acrylate oligomer, 2 to 5 parts of viscosity regulator, 2 to 4 parts of plasticizer, 0.5 to 2 parts of cross-linking agent, 0.3 to 1 part of coupling agent, 0.5 to 1.5 parts of photoinitiator, 0.2 to 1 part of defoaming agent and 0.2 to 1 part of antioxidant.

[0011] In a possible implementation manner, the SCA optical adhesive in the middle portion further includes 0 to 0.5 parts of a polymerization inhibitor by weight.

[0012] In a possible embodiment, the polymerization inhibitor includes one or a combination of two or more of hydroquinone, p-methoxyphenol, methylhydroquinone, and p-hydroxyanisole.

[0013] In one possible embodiment, the acrylate oligomer includes one or a combination of two or more of bisphenol A epoxy acrylate, polyurethane acrylate, polyester acrylate, polyether acrylate, tripropylene glycol diacrylate, 1,6-hexanediol diacrylate, octafluoropentyl methacrylate, and trifluoroethanol acrylate; and / or

[0014] The viscosity modifier includes one or a combination of two or more of microcrystalline wax, paraffin wax, polyethylene wax, oxidized polyethylene wax, polypropylene wax, and APAO; and / or

[0015] The plasticizer includes one or a combination of two or more of adipic acid ester compounds, phthalic acid ester compounds, and phosphate esters; and / or

[0016] The cross-linking agent includes one or a combination of two or more of di-tert-butyl peroxide, 2,5-dimethyl-2,5-di-tert-butyl peroxide hexane, diisopropylbenzene hydroperoxide, and benzoyl peroxide; and / or

[0017] The coupling agent includes one or a combination of two or more of a silane coupling agent, a sulfur silane coupling agent, an amino silane coupling agent, and an epoxy silane coupling agent; and / or

[0018] The photoinitiator includes one or a combination of two or more of 2-hydroxy-2-methyl-1-phenyl-1-propanone, benzoin and its derivatives, benzil derivatives, dialkoxyacetophenone, α-hydroxyalkyl phenone, benzophenone and its derivatives, vinyl sulfide compounds, diazonium salts, diaryliodonium salts, triarylsulfonium salts, alkylsulfonium salts, and iron arene salts; and / or

[0019] The defoaming agent comprises one or a combination of two or more of methyltrimethoxysilane, hydroxyvinyl oligosiloxane and foam-breaking polysiloxane; and / or

[0020] The antioxidant includes one or a combination of two or more of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]pentaerythritol, tris(2,4-di-tert-butyl)phenyl phosphite, triphenyl phosphate, and methyl parahydroxybenzoate.

[0021] In one possible embodiment, the edge portion includes a first sub-portion and a second sub-portion arranged opposite to each other along a first direction, the first direction being a width direction of the adhesive layer, and the first sub-portion and the second sub-portion are respectively located on opposite sides of the middle portion;

[0022] The width of the first sub-portion in the first direction is a first width, the middle portion includes a first side and a second side arranged opposite to each other in the first direction, the distance between the midpoints of the first side and the second side is a second width, and the ratio of the first width to the second width is between 0.19 and 0.32; and / or,

[0023] The width of the second sub-portion in the first direction is the first width, the middle portion includes a first side and a second side arranged opposite to each other in the first direction, the distance between the midpoints of the first side and the second side is the second width, and the ratio of the first width to the second width is between 0.19-0.32.

[0024] In a possible implementation manner, the middle portion and the edge portion of the adhesive layer have the same thickness, and the thickness of the middle portion and the edge portion is 120-280 μm.

[0025] In a possible implementation manner, the thickness of the substrate is 0.3-1.5 mm.

[0026] In a possible implementation manner, the thickness of the antireflection film is 100-2000 nm.

[0027] In a possible implementation, the vehicle window glass further includes a heat-insulating film, and the heat-insulating film is arranged on the second surface of the outer glass plate and / or the third surface of the inner glass plate, avoiding the information collection area of ​​the vehicle window glass.

[0028] In a possible implementation manner, the transmittance of the laminated glass to light with a wavelength of 800-1600 nm is greater than or equal to 88%.

[0029] In a possible implementation manner, the transmittance of the adhesive layer to light with a wavelength of 800-1600 nm is greater than or equal to 98%.

[0030] In a possible implementation manner, the refractive index of the adhesive layer for light with a wavelength of 800-1600 nm is 1.46-1.49.

[0031] In one possible embodiment, the substrate includes a peripheral side surface, and a connecting surface and a coating surface arranged opposite to each other, the connecting surface is connected to the fourth surface of the inner glass plate through the adhesive layer, the coating surface is connected to the anti-reflection film, and the peripheral side surface is arranged around the connecting surface and the coating surface, and the angle between the connecting surface and the peripheral side surface is 90°.

[0032] In a possible implementation, measured from one side of the first surface, the Lab values ​​of the visible light reflection color of the information collection area are: a value is -3 to +3, and b value is -3 to +3.

[0033] A second aspect of the present application provides a vehicle, comprising an optical sensor assembly, a vehicle body, and the vehicle window glass as described above, wherein the vehicle window glass is connected to the vehicle body, the optical sensor assembly is connected to the inside of the vehicle body, and the optical signal of the optical sensor assembly can pass through the vehicle window glass.

[0034] The beneficial effects of this application are:

[0035] The present application can improve the transmittance of the information collection area to optical signals by attaching an anti-reflection film to the information collection area of ​​the car window glass, which can reduce costs compared to directly coating the car window glass. In addition, the bonding layer includes a middle part and an edge part, and the edge part is connected to the periphery of the middle part. The middle part adopts SCA optical glue, and the edge part adopts OCA optical glue. The present application sets the edge part of the bonding layer to OCA optical glue, and the middle part to SCA optical glue, so that the OCA optical glue in the edge part will not flow during the pressing stage, thereby avoiding the thinning of the edge position of the bonding layer during the pressing stage, resulting in optical distortion. In addition, the SCA optical glue in the middle part can reduce production costs and is less likely to cause defects such as bubbles during the bonding process, thereby improving the product quality of the car window glass. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application;

[0037] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the vehicle window glass along the thickness direction;

[0038] Figure 3 for Figure 2 The schematic diagram of the plane structure of the window glass perpendicular to the thickness direction shown;

[0039] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure of the antireflection film of the vehicle window glass shown;

[0040] Figure 5 yes Figure 2 Schematic diagram of the structure of the antireflection sheet and the adhesive layer shown;

[0041] Figure 6 yes Figure 2 A possible structural diagram of the bonding layer is shown;

[0042] Figure 7 yes Figure 6 A schematic structural diagram of a cross section of the adhesive layer shown;

[0043] Figure 8 for Figure 2 The schematic diagram of the cross-sectional structure of the heat-insulating layer and the shielding layer of the vehicle window glass is shown. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0045] The present application provides a vehicle window glass, on which an anti-reflection film structure is affixed in the area corresponding to the signal transmission of the information collection system. This not only improves the transmittance of the signal in the information collection area on the vehicle window glass, but also reduces the coating cost compared to directly coating the anti-reflection film on the vehicle window glass.

[0046] See also Figure 1 The vehicle 1000 includes a vehicle window glass 100, a vehicle body 200, and an optical sensor assembly (not shown). The vehicle window glass 100 is mounted on the vehicle body 200, and the optical sensor assembly is connected to the inside of the vehicle body 200. The optical signal of the optical sensor assembly can pass through the vehicle window glass 100. This embodiment is described by taking the vehicle window glass 100 as the front windshield of the vehicle 1000 as an example, but in other embodiments, the vehicle window glass 100 can also be the side window glass, sunroof glass, or rear windshield of the vehicle 1000. This application does not specifically limit the usage scenario of the vehicle window glass 100. The optical sensor assembly includes but is not limited to laser radar (LiDAR), near-infrared camera, etc. This application does not specifically limit the type of optical sensor assembly. The optical signal of the optical sensor assembly can be, but is not limited to, near-infrared rays, far-infrared rays, etc.

[0047] For the convenience of description, define Figure 2 The length direction of the vehicle window glass 100 is the X-axis direction, the width direction of the vehicle window glass 100 is the Y-axis direction, and the thickness direction of the vehicle window glass 100 is the Z-axis direction. The X-axis direction, the Y-axis direction and the Z-axis direction are perpendicular to each other.

[0048] See also Figure 2The vehicle window glass 100 includes a laminated glass 10 and an antireflection film 30. The antireflection film 30 is adhered to the surface of the laminated glass 10 via an adhesive layer 20. In this embodiment, the laminated glass 10 includes an outer glass pane 11, an intermediate layer 12, and an inner glass pane 13. The intermediate layer 12 is laminated between the outer glass pane 11 and the inner glass pane 13. The outer glass pane 11 includes a first surface 111 and a second surface 112, which are arranged in opposite directions. The first surface 111 of the outer glass pane 11 faces the exterior of the vehicle 1000 and is the exterior surface of the vehicle window glass 100. The second surface 112 of the outer glass pane 11 faces the intermediate layer 12. The inner glass pane 13 includes a third surface 131 and a fourth surface 132, which are arranged in opposite directions. The third surface 131 of the inner glass pane 13 faces the intermediate layer 12, and the fourth surface 132 of the inner glass pane 13 faces the interior of the vehicle 1000 and is the interior surface of the vehicle window glass 100. The intermediate layer 12 connects the second surface 112 of the outer glass pane 11 and the third surface 131 of the inner glass pane 13 .

[0049] It should be noted that the laminated glass 10 can be in the form of a flat plate, or it can also be in the form of a curved or arcuate surface. The shape of the laminated glass 10 is not limited to the shapes described above, and it can be any shape that meets the requirements of the vehicle window glass 100. This application does not impose strict restrictions on the shape of the laminated glass 10.

[0050] For example, the outer glass panel 11 and the inner glass panel 13 can be made of clear glass or tinted glass, such as tinted green glass or tinted gray glass. However, the visible light transmittance of both the outer glass panel 11 and the inner glass panel 13 must be greater than or equal to 70%, preferably greater than or equal to 80%, or even greater than or equal to 90%. At least one of the outer glass panel 11 and the inner glass panel 13 must have a transmittance of at least 91% within the wavelength range of 800-1600 nm, and ultra-clear float glass may be used. The transmittance of the laminated glass 10 within the wavelength range of 800-1600 nm is at least 88%.

[0051] In one embodiment, both the outer glass sheet 11 and the inner glass sheet 13 are ultra-clear float glass. Ultra-clear float glass improves the infrared transmittance of the vehicle window glass 100. The thickness of the outer glass sheet 11 is G1, and the thickness of the inner glass sheet 13 is G2, where G1 is greater than or equal to G2. In one embodiment, G1 is greater than twice G2. In another embodiment, G1 is greater than 2.5 times G2.

[0052] For example, the thickness G1 of the outer glass sheet 11 is 3.2 mm, and the thickness G2 of the inner glass sheet 13 is 1.2 mm. Because the outer glass sheet 11 requires high durability and impact resistance against external obstacles, it is preferably made of thick glass. To reduce infrared absorption by the inner glass sheet 13, the thickness of the inner glass sheet 13 is relatively small. To meet glass strength requirements, the inner glass sheet 13 can be tempered to increase its strength. This minimizes infrared absorption while maintaining sufficient strength, while also meeting lightweight requirements and reducing the combined thickness of the inner and outer glass sheets.

[0053] In this embodiment, the interlayer 12 is a thermoplastic polymer layer used to bond the outer glass pane 11 and the inner glass pane 13 to form a sandwich structure. The material of the interlayer 12 can be selected from polyvinyl butyral (PVB), polyolefin (POE), ethylene-vinyl acetate copolymer (EVA), polyurethane (PU), etc., with polyvinyl butyral (PVB) being preferred. The use of polyvinyl butyral (PVB) effectively suppresses the transmission of noise, providing the laminated glass 10 with a soundproofing effect.

[0054] Please also refer to Figure 3 In this embodiment, the vehicle window glass 100 further includes an information collection area S1 and a non-information collection area S2, and the information collection area S1 and the non-information collection area S2 do not overlap. The information collection area S1 is used to provide a signal transmission area for the information collection system (not shown) to collect signals. When the vehicle window glass 100 is installed on the vehicle 1000, the information collection system is located inside the vehicle 1000, and the signals transmitted and / or received by the information collection system will all pass through the information collection area S1 of the vehicle window glass 100. The non-information collection area S2 includes a field of view area S21 and a shielded area S22. The field of view area S21 is a transparent area that allows light to pass through the interior and exterior, i.e., the vehicle window portion. The shielded area S22 is used to prevent visible light from passing through the laminated glass 10. In other embodiments, the field of view area S21 may also be partially used for a head-up display (HUD), that is, as the HUD field of view to display information such as driving speed, dynamic navigation, and business district information, while the shielded area S22 may be used solely for aesthetic purposes. This application does not impose strict restrictions on the use of the non-information collection area S2.

[0055] In the embodiment of the present application, the information collection area S1, the viewing area S21, and the shielding area S22 do not overlap. In one embodiment, the information collection area S1 is located within the viewing area S21, the viewing area S21 is located outside the information collection area S1, and the viewing area S21 is arranged around the periphery of the information collection area S1. The viewing area S21 completely surrounds the information collection area S1, and the shape of the viewing area S21 matches the shape of the laminated glass 10. The shielding area S22 is in the shape of an annular frame, and the shielding area S22 surrounds the peripheral edge of the viewing area S21; the outer edge S221 of the shielding area S22 is the outer edge of the laminated glass 10, and the inner edge S222 of the shielding area S22 is connected to the peripheral edge of the viewing area S21. The side edge S11 of the information collection area S1 and the inner edge S222 of the shielding area S22 are spaced apart. It should be noted that the outer side S221 and the inner side S222 are the boundary lines of the shielding area S22 , in order to more clearly illustrate the positional relationship between the shielding area S22 and the viewing area S21 .

[0056] The information collection area S1 can be spaced apart from the shielding area S22. For example, see Figure 3 Middle a, Figure 3 a in the middle is Figure 2 The schematic diagram of the plane structure of the vehicle window glass 100 is perpendicular to the thickness direction. Alternatively, please refer to Figure 3 Middle b, Figure 3 b is Figure 2 The window glass 100 shown is another planar structure schematic diagram perpendicular to the thickness direction. The information collection area S1 can be set at the edge of the shielding area S22 close to the middle of the window glass 100, and the information collection area S1 can extend from the edge of the shielding area S22 close to the roof side to the middle of the window glass 100.

[0057] The information collection area S1 may also be a triangle, pentagon, hexagon, etc. The shielding area S22 may also be of other shapes. The viewing area S21 may also have other positional relationships with the information collection area S1, and the viewing area S21 may also have other shapes. This application does not impose strict restrictions on the location and shape of the information collection area S1 and the viewing area S21.

[0058] See also Figure 4 and Figure 5 , Figure 4 yes Figure 2 The cross-sectional structure diagram of the antireflection film of the window glass shown in FIG. Figure 5 yes Figure 2The antireflection sheet 30 is shown in a schematic diagram of the structure of the adhesive layer 20. The antireflection sheet 30 is provided on the fourth surface 132 of the inner glass plate 13. In this embodiment, the antireflection sheet 30 includes a substrate 31 and an antireflection film 32. The antireflection film 32 is laminated on the substrate 31 and completely covers the substrate 31 (the width and length of the antireflection film 32 are equal to the width and length of the substrate 31). Figure 4 As shown. The area of ​​the antireflection film 32 only needs to allow the near-infrared light signal to pass through. The adhesive layer 20 and the antireflection film 30 are sequentially laminated on the fourth surface 132 of the inner glass plate 13. The antireflection film 30 is bonded to the fourth surface 132 of the inner glass plate 13 via the adhesive layer 20.

[0059] Along the thickness direction (Z-axis direction) of the laminated glass 10, the antireflection film 32's orthographic projection on the laminated glass 10 at least completely overlaps the information collection area S1 (the width and length of the antireflection film 32 are at least equal to the width and length of the information collection area S1). This can also be understood as the antireflection film 32 completely covering the information collection area S1, or after completely covering the information collection area S1, there is still some antireflection film 32 stacked on the field of view area S21. In other embodiments, the antireflection film 32 may also partially cover the substrate 31, as long as the orthographic projection of the antireflection film 32 on the laminated glass 10 at least completely overlaps the information collection area S1.

[0060] In this embodiment, the substrate 31 includes a peripheral side surface 310, and a connecting surface 311 and a coating surface 312 that are arranged opposite to each other. The connecting surface 311 is connected to the fourth surface 132 of the inner glass plate 13 through the adhesive layer 20, and the coating surface 312 is connected to the anti-reflection film 32. The peripheral side surface 310 is arranged around the connecting surface 311 and the coating surface 312.

[0061] The top corners and edges of the end of the substrate 31 where the connecting surface 311 is located can be ground at right angles. That is, the angle between the connecting surface 311 and the peripheral side surface 310 can be 90°. It is understood that using right-angled grinding on the side of the substrate 31 where the connecting surface 311 is located can prevent gaps from forming at the edge where the anti-reflection sheet 30 and the laminated glass 10 are bonded together, thereby preventing contaminants such as dust and impurities from entering the narrow edge gap. This, in turn, prevents damage to the aging resistance of the adhesive layer 20 and the aesthetics of the edge of the anti-reflection sheet 30 from being affected.

[0062] The coated surface 312 of the substrate 31 is rounded and edge-polished at one end. Specifically, the top corner of the edge of the coated surface 312 may be rounded 313, and the coated surface 312 may be connected to the peripheral side surface 310 of the substrate 31 via a curved surface 314. Due to the rounded edge, the coated surface 312 of the substrate 31 is smoother at the end facing away from the laminated glass 10, making it less susceptible to damage from external objects.

[0063] Exemplarily, the thickness of the substrate 31 can be 0.3-1.5 mm. In one embodiment, the thickness of the substrate 31 is 0.55 mm. In one embodiment, the thickness of the substrate 31 is 0.7 mm. In one embodiment, the thickness of the substrate 31 is 1.1 mm. In one embodiment, the thickness of the substrate 31 is 1.5 mm. The shape of the substrate 31 can also be circular, trapezoidal, or other irregular shapes. The substrate 31 is made of a transparent material, and the substrate 31 can be, but is not limited to, glass or plastic. Specifically, the substrate 31 can be soda-lime silicate glass, high-aluminum silicate glass, borosilicate glass, or any glass material with good transmittance that can be provided on the laminated glass 10, or can be a plastic material such as PP (Polypropylene), PC (Polycarbonate), PMMA (Polymethyl methacrylate), or PU (Polyurethane). When the substrate 31 is made of glass, it needs to be chemically tempered before use. This can effectively improve the overall mechanical strength and flexibility of the substrate 31 and prevent the substrate 31 from breaking during the bonding process or optical distortion at the edge of the substrate 31 after bonding.

[0064] The antireflection film 32 is provided on the coating surface 312 of the substrate 31. Exemplarily, the antireflection film 32 can be formed on the coating surface 312 by magnetron sputtering. The thickness of the antireflection film 32 can be between 100 nm and 2000 nm (including the endpoint values ​​of 100 nm and 2000 nm). Preferably, the thickness of the antireflection film 32 can be between 200 nm and 1200 nm (including the endpoint values ​​of 200 nm and 1200 nm). More preferably, the thickness of the antireflection film 32 can be between 300 nm and 800 nm (including the endpoint values ​​of 300 nm and 800 nm).

[0065] The antireflection film 32 may be a natural light antireflection film in the infrared band (infrared light with a wavelength of 800-1600 nm) or a P-polarized light antireflection film.

[0066] In one possible embodiment, the anti-reflection film 32 is an infrared band natural light anti-reflection film. At a vehicle installation angle of (60±6° AOI), the natural light transmittance of the vehicle window glass 100 installed with the natural light anti-reflection film is increased by more than 8% compared to the natural light transmittance of the vehicle window glass 100 without the anti-reflection film 30. Preferably, the natural light transmittance of the vehicle window glass 100 installed with the natural light anti-reflection film is increased by more than 10% compared to the natural light transmittance of the vehicle window glass 100 without the anti-reflection film 30. More preferably, the natural light transmittance of the vehicle window glass 100 installed with the natural light anti-reflection film is increased by more than 12% compared to the natural light transmittance of the vehicle window glass 100 without the anti-reflection film 30.

[0067] In another possible embodiment, the anti-reflection film 32 is an infrared band P-polarized light anti-reflection film. At a vehicle installation angle of (60±6° AOI), the P-polarized light transmittance of the vehicle window glass 100 installed with the P-polarized light anti-reflection film is increased by more than 1.4% compared to the P-polarized light transmittance of the vehicle window glass 100 without the anti-reflection film 30. Preferably, the P-polarized light transmittance of the vehicle window glass 100 installed with the P-polarized light anti-reflection film is increased by more than 1.5% compared to the P-polarized light transmittance of the vehicle window glass 100 without the anti-reflection film 30. More preferably, the P-polarized light transmittance of the vehicle window glass 100 installed with the P-polarized light anti-reflection film is increased by more than 1.6% compared to the P-polarized light transmittance of the vehicle window glass 100 without the anti-reflection film 30.

[0068] An angular color test was conducted on the information collection area S1, which is attached to the anti-reflection film 30. Visible light (380-780 nm) was irradiated toward the information collection area S1 from the first surface 111 of the outer glass plate 11 of the vehicle window glass 100 at an incident angle of 60±6°. According to the CIE Lab color model (a color model published by the International Commission on Illumination (CIE) in 1976), the Lab values ​​of the color reflected by the information collection area S1 for visible light are: a value of -3 to +3 (inclusive), and b value of -3 to +3 (inclusive). Here, a is the red-green chromaticity value, and b is the yellow-blue chromaticity value. This ensures that the color of the information collection area S1 of the vehicle window glass 100, which is attached to the anti-reflection film 30, is neutral when viewed from outside the vehicle, ensuring that the vehicle window glass 100 maintains a good appearance when viewed from outside the vehicle.

[0069] It should be noted that, in other embodiments, the anti-reflection film 30 may also improve the transmittance of the information collection area S1 to signals in other wavelength bands except 800-1600 nm, which is not strictly limited in this application.

[0070] Please refer to Figure 2 The adhesive layer 20 is provided between the fourth surface 132 of the inner glass plate 13 and the substrate 31. In this embodiment, please refer to Figure 6 Adhesive layer 20 includes a central portion 21 and an edge portion 23. Edge portion 23 is attached to the periphery of central portion 21. Edge portion 23 is bonded to the outer periphery of central portion 21 using OCA optical adhesive, while central portion 21 is bonded to SCA optical adhesive. In other words, edge portion 23 forms a closed frame. When central portion 21 and edge portion 23 are bonded to anti-reflection film 30, edge portion 23 surrounds central portion 21, and the orthographic projections of central portion 21 and edge portion 23 completely overlap with the orthographic projection of anti-reflection film 30.

[0071] In actual production, the main component of OCA optical adhesive is acrylic resin, which has high initial bonding performance and high bonding performance after curing. If the adhesive layer 20 is set as OCA optical adhesive, that is, OCA optical adhesive is used for bonding, rework before curing will be difficult due to the high initial bonding performance of OCA adhesive. If defective products are produced during bonding, it is easy to reduce the yield of finished products.

[0072] SCA optical adhesive is a solid, UV-resistant optical adhesive with excellent light transmittance and adhesion. SCA optical adhesive, primarily composed of EVA resin, exhibits low initial adhesion, but its cured adhesion far exceeds that of OCA optical adhesive. Laminating with SCA optical adhesive simplifies rework before curing due to its low initial adhesion, significantly reducing defect rates.

[0073] In actual production, the anti-reflection film 30 requires a temperature of more than 80°C during the pressing stage with SCA optical glue. For example, the temperature required for the pressing stage can be between 80°C and 90°C. High temperature will cause the SCA optical glue to be in a semi-fluid state during hot pressing. If the adhesive layer 20 is set to SCA optical glue, during the hot pressing process, the glue at the edge of the SCA optical glue in a semi-fluid state is easy to overflow, resulting in uneven thickness of the adhesive layer 20 after pressing and curing, causing optical distortion of the vehicle window glass 100, affecting the transmission quality of the optical signal and making the optical sensor assembly unable to work properly. When the optical sensor assembly inside the vehicle 1000 is working normally, it is required that the value of the light distortion generated by the information collection area S1 of the vehicle window glass 100 is less than or equal to 150mdpt.

[0074] By using OCA optical adhesive at the edge portion 23 of the adhesive layer 20 and SCA optical adhesive at the middle portion 21, the OCA adhesive at the edge portion 23 does not flow during the lamination process, thereby preventing the adhesive layer 20 from becoming thinner at the edge after lamination and curing, which could lead to optical distortion. Furthermore, the SCA optical adhesive at the middle portion 21 reduces production costs and is less likely to cause defects such as bubbles during the lamination process. This prevents the optical distortion areas surrounding the bubbles from affecting the transmission of optical signals, thereby improving the product quality of the vehicle window glass 100.

[0075] It is understandable that the present application can improve the transmittance of the information collection area S1 to optical signals by attaching the anti-reflection film 30 to the information collection area S1 of the vehicle window glass 100, which can reduce costs compared to directly coating the vehicle window glass 100.

[0076] In the present application, the transmittance of the adhesive layer 20 for light with a wavelength of 800-1600 nm can be greater than or equal to 98%. The refractive index of the adhesive layer 20 for light with a wavelength of 800-1600 nm ranges from 1.46 to 1.49 (including the endpoints 1.46 and 1.49). Specifically, since incident light may be reflected and lost due to the difference in refractive indices between the media when penetrating the interface of the media, when the light passes through the interface between the fourth surface 132 of the inner glass plate 13 and the adhesive layer 20, for the near-infrared wavelength of 800-1600 nm, the refractive index of the adhesive layer 20 is 1.46-1.49, while the refractive index of the inner glass plate 13 is 1.43-1.47. Since the difference in refractive indices between the adhesive layer 20 and the inner glass plate 13 for the near-infrared wavelength is extremely small, very little light is reflected at the interface of the media, resulting in minimal reflection loss and high light transmittance. When light passes through the interface between the anti-reflection film 32 and the outside of the vehicle window glass 100, where the anti-reflection film 32 is an anti-reflection film with an alternating structure of high and low refractive index film layers and has high transmittance in the near-infrared band with a wavelength of 800-1600nm; under the combined influence of the anti-reflection film 32 and the adhesive layer 20, the transmittance of the vehicle window glass 100 in the near-infrared band with a wavelength of 800-1600nm is improved.

[0077] In the present application, the thickness of the middle portion 21 and the edge portion 23 of the adhesive layer 20 is equal, and the thickness of the middle portion 21 and the edge portion 23 is 120-280 μm. The thickness of the adhesive layer 20 is uniformly set, so that the adhesive layer 20 can stably transmit the optical signal. Exemplary, the thickness of the adhesive layer 20 can be 120 μm, 160 μm, 200 μm, 240 μm or 280 μm. Preferably, the thickness of the adhesive layer 20 can be between 150-250 μm (including the endpoint values ​​150 μm and 250 μm). More preferably, the thickness of the adhesive layer 20 can be 160 μm, 200 μm or 240 μm.

[0078] It is understood that if the adhesive layer 20 is too thick, the anti-reflection film 30 will protrude further from the inner surface of the vehicle window glass 100, making the vehicle window glass 100 unsightly and also affecting the transmittance of optical signals. If the adhesive layer 20 is too thin, it will not be able to provide a buffer between the laminated glass 10 and the anti-reflection film 30, resulting in the anti-reflection film 30 being shattered due to the curvature difference between the anti-reflection film 30 and the laminated glass 10 during the bonding process. The thickness of the adhesive layer 20 set in the present application can provide a sufficient buffer between the laminated glass 10 and the anti-reflection film 30 without affecting the aesthetics of the vehicle window glass 100.

[0079] In the examples of this application, please refer to Figure 7The adhesive layer 20 also includes a fusion zone 22, which is the area where the OCA optical adhesive in the edge portion 23 and the SCA optical adhesive in the middle portion 21 fuse together after hot pressing and curing. This fusion zone 22 will affect the optical distortion of the anti-reflection film 30. When the SCA optical adhesive in the fusion zone 22 and the OCA optical adhesive fuse well with each other after hot pressing and curing, the area on the anti-reflection film 30 corresponding to the fusion zone 22 will not show obvious optical distortion. On the contrary, when the SCA optical adhesive in the fusion zone 22 and the OCA optical adhesive do not fuse well with each other after hot pressing and curing, the area on the anti-reflection film 30 corresponding to the fusion zone 22 will show obvious optical distortion. To solve this problem, in the present application, the OCA optical adhesive in the edge portion 23 is an acrylic adhesive. The main component of the OCA optical adhesive in the edge portion 23 is acrylic resin. The SCA optical adhesive used in the middle portion 21 in the present application is an improved SCA optical adhesive, and the formula of this improved SCA optical adhesive contains an acrylic oligomer.

[0080] In the present application, the SCA optical adhesive of the middle part 21 includes the following components in parts by weight: 65 to 75 parts of EVA resin, 15 to 25 parts of acrylate oligomer, 2 to 5 parts of viscosity regulator, 2 to 4 parts of plasticizer, 0.5 to 2 parts of cross-linking agent, 0.3 to 1 part of coupling agent, 0.5 to 1.5 parts of photoinitiator, 0.2 to 1 part of defoaming agent and 0.2 to 1 part of antioxidant.

[0081] In an embodiment of the present application, 15-25 parts (by weight) of an acrylate oligomer are added to the raw material formula of the SCA optical adhesive. Specifically, the weight of the acrylate oligomer can be, but is not limited to, 15 parts, 18 parts, 21 parts, 24 parts, or 25 parts. The acrylate oligomer includes one or a combination of two or more of bisphenol A epoxy acrylate, polyurethane acrylate, polyester acrylate, polyether acrylate, tripropylene glycol diacrylate, 1,6-hexanediol diacrylate, octafluoropentyl methacrylate, and trifluoroethanol acrylate. It can be understood that in this embodiment, the main component of the OCA optical adhesive of the edge part 23 is acrylic resin, and the components of the SCA optical adhesive of the middle part 21 contain 15 to 25 parts by weight of acrylic ester oligomers. Since some components of the SCA optical adhesive of the middle part 21 are the same as those of the OCA optical adhesive of the edge part 23, during the bonding process, the material of the middle part 21 and the material of the edge part 23 can be better fused, avoiding obvious optical distortion in the contact area (i.e., the fusion area 22) corresponding to the material of the middle part 21 and the material of the edge part 23 on the anti-reflection film 30.

[0082] In an embodiment of the present application, 2-5 parts (by weight) of a viscosity modifier are added to the raw material formula of the above-mentioned SCA optical adhesive. Specifically, the weight of the viscosity modifier can be, but is not limited to, 2 parts, 3 parts, 4 parts, or 5 parts. The viscosity modifier has the function of adjusting the viscosity of the SCA optical adhesive, so that the SCA optical adhesive has excellent comprehensive performance. The viscosity modifier can include one or a combination of two or more of microcrystalline wax, paraffin wax, polyethylene wax, oxidized polyethylene wax, polypropylene wax, APAO (amorphous α-olefin copolymer), etc.

[0083] In an embodiment of the present application, 2-4 parts (by weight) of plasticizer are added to the raw material formula ingredients in the above-mentioned SCA optical adhesive. Specifically, the weight parts of the plasticizer can be but not limited to 2 parts, 3 parts, and 4 parts. The plasticizer has the effect of adjusting the flexibility of the SCA optical adhesive, which can effectively prevent the crack propagation of the SCA optical adhesive and thus improve its impact resistance, so as to reduce the occurrence of cracks in the SCA optical adhesive when it is bonded to a thinner anti-reflection film, and is more suitable for adhesive bonding of automotive glass patches. The plasticizer can include one or more combinations of adipic acid ester compounds, phthalic acid ester compounds, phosphate esters, etc. The adipic acid ester compounds can specifically include one or more combinations of dioctyl adipate (DOA), dioctyl azelate (DOZ), dioctyl sebacate (DOS), etc. The phthalate compounds may specifically include one or a combination of two or more of dioctyl phthalate (DOP), diester phthalate (DBP), diisodecyl phthalate (DIDP), etc. The phosphate esters may specifically include one or a combination of two or more of tricresyl phosphate (TCP), triphenyl phosphate (TPP), trioctyl phosphate (TOP), etc.

[0084] In an embodiment of the present application, 0.5 to 2 parts (by weight) of a crosslinking agent are added to the raw material formula of the SCA optical adhesive. Specifically, the weight of the crosslinking agent can be, but is not limited to, 0.5, 0.75, 1, 1.25, 1.5, 1.75, or 2. The crosslinking agent can include one or a combination of two or more of di-tert-butyl peroxide, 2,5-dimethyl-2,5-di-tert-butyl peroxide hexane, diisopropylbenzene hydroperoxide, and benzoyl peroxide.

[0085] In an embodiment of the present application, 0.3-1 parts (by weight) of coupling agent are added to the raw material formula components in the above-mentioned SCA optical adhesive. Specifically, the weight of the coupling agent can be but not limited to 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, and 1 parts. The coupling agent in the present invention enables the SCA optical adhesive to form stronger physical and chemical interactions inside, and significantly improves the interfacial adhesion and mechanical properties of the optical adhesive layer without affecting the bonding effect and the repair effect. The coupling agent can include one or a combination of two or more of a silane coupling agent, a sulfur silane coupling agent, an amino silane coupling agent, an epoxy silane coupling agent, etc. In some specific embodiments, the silane coupling agent includes but is not limited to γ-glycidyloxypropyltrimethoxysilane (KH560) and the like.

[0086] In an embodiment of the present application, 0.5-1.5 parts (by weight) of a photoinitiator are added to the raw material formula components in the above-mentioned SCA optical adhesive. Specifically, the weight of the photoinitiator can be, but is not limited to, 0.5 parts, 0.7 parts, 0.9 parts, 1.1 parts, 1.3 parts, and 1.5 parts. In the SCA optical adhesive, the photoinitiator is a substance that can absorb radiation energy, undergo chemical changes upon excitation, and produce an active intermediate with the ability to initiate polymerization, thereby initiating polymerization, cross-linking, and curing. The photoinitiator may include one or more of 2-hydroxy-2-methyl-1-phenyl-1-propanone, benzoin and its derivatives, benzil and its derivatives, dialkoxyacetophenone, α-hydroxyalkyl phenone, benzophenone and its derivatives, vinyl sulfide compounds, diazonium salts, diaryliodonium salts, triarylsulfonium salts, alkylsulfonium salts, iron aromatic salts, etc.

[0087] In an embodiment of the present application, 0.2-1 parts (by weight) of defoaming agent are added to the raw material formula components in the above-mentioned SCA optical adhesive. Specifically, the weight of the defoaming agent can be but not limited to 0.2 parts, 0.4 parts, 0.6 parts, 0.8 parts, and 1 part. The defoaming agent can avoid the appearance of bubbles after the SCA optical adhesive is cured, affecting its transmittance and refractive effects. The defoaming agent may include one or a combination of two or more of methyltrimethoxysilane, hydroxyvinyl oligosiloxane, and foam-breaking polysiloxane. In some specific embodiments, the hydroxyvinyl oligosiloxane can be a compound described in formula (2) in application number 201810215624.3, publication number CN108384509B, and invention name "A low-viscosity optical adhesive composition, its preparation method, and its use for perfusing touch screens to achieve full bonding."

[0088] In an embodiment of the present application, 0.2-1 parts (by weight) of antioxidants are added to the raw material formula components in the above-mentioned SCA optical adhesive. Specifically, the weight of the antioxidant can be, but is not limited to, 0.2 parts, 0.4 parts, 0.6 parts, 0.8 parts, and 1 part. The antioxidant can hinder the adverse effects of oxygen on the UV-curing SCA optical adhesive, and avoid aging, yellowing, and other phenomena after the SCA optical adhesive is cured. The antioxidant can include one or a combination of two or more of tetrakis[β(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]pentaerythritol, tris(2,4-di-tert-butyl)phenyl phosphite, triphenyl phosphate, methyl parahydroxybenzoate, etc.

[0089] In the present application, the SCA optical adhesive in the middle part 21 also includes 0 to 0.5 parts of an inhibitor. Specifically, the weight of the inhibitor can be, but is not limited to, 0, 0.1, 0.2, 0.3, 0.4, or 0.5 parts. The addition of the inhibitor can prevent the SCA optical adhesive from prematurely cross-linking and polymerizing during storage and transportation before actual production, causing failure. The inhibitor can include one or a combination of two or more of hydroquinone, p-methoxyphenol, methylhydroquinone, p-hydroxyanisole, and the like.

[0090] Compared with conventional SCA optical adhesive, the present application adds acrylate oligomers to the SCA optical adhesive in the middle part 21, so the SCA optical adhesive in the middle part 21 has the following advantages: 1. It fuses well with the OCA optical adhesive of the present application after hot pressing and curing, and no obvious light distortion occurs in the area corresponding to the fusion zone 22 on the anti-reflection film 30; 2. It has higher bonding strength before curing; 3. It has a lower hot pressing bonding temperature. The hot pressing bonding temperature of the SCA optical adhesive used in this embodiment is 60°C-70°C; 4. UV curing can be completed at a lower UV curing energy. The required UV curing energy of the SCA optical adhesive used in the present application is 4000-5000MJ / cm 2 .

[0091] Please refer to Figure 6 , Figure 6 yes Figure 2 The adhesive layer 20 is a possible structural diagram shown in FIG. The adhesive layer 20 includes a middle portion 21 and an edge portion 23. The edge portion 23 is connected to the periphery of the middle portion 21. Figure 5 The adhesive layer 20 further includes a first adhesive surface 201 and a second adhesive surface 202 disposed opposite each other in the Z-axis direction. In actual use, the first adhesive surface 201 is first connected to the connection surface 311 of the substrate 31 in the antireflection film 30. The second adhesive surface 202 of the adhesive layer 20 is then aligned and connected to the fourth surface 132 of the inner glass plate 13. The specific structure of the adhesive layer 20 is illustrated in the following embodiments.

[0092] Please refer to Figure 6 The ratio of the width of the edge portion 23 (the first width D1 or third width D2 described below) to the width of the middle portion 21 in the same direction (the second width W1 or fourth width W2 described below) can be between 0.19 and 0.32 (including the endpoints of 0.19 and 0.32). The width of the edge portion 23 is the distance between the edge of the adhesive layer 20 and the middle portion 21 in the X-axis direction or the Y-axis direction. The width of the middle portion 21 is the distance between the midpoints of two opposite sides of the adhesive layer 20 in the X-axis direction or the Y-axis direction.

[0093] Specifically, the edge portion 23 includes a first sub-portion 231 and a second sub-portion 232, which are sequentially arranged along the X-axis, and a third sub-portion 233 and a fourth sub-portion 234, which are sequentially arranged along the Y-axis. The first sub-portion 231 and the second sub-portion 232 are arranged opposite each other along a first direction, which is the width of the adhesive layer 20. The first sub-portion 231 and the second sub-portion 232 are located on opposite sides of the middle portion 21 along the X-axis. The third sub-portion 233 and the fourth sub-portion 234 are located on opposite sides of the middle portion 21 along the Y-axis.

[0094] For example, Figure 6 The width of the first subsection 231 is the distance between the edge of the adhesive layer 20 and the edge of the middle section 21 in the X-axis direction. The middle section 21 includes a first side 211 and a second side 212 disposed opposite each other along the X-axis, and a third side 213 and a fourth side 214 disposed opposite each other along the Y-axis. The width of the middle section 21 in the X-axis direction is the distance between the midpoint of the first side 211 and the midpoint of the second side 212. For example, the adhesive layer 20 can be shaped like a trapezoid, and the middle section 21 can also be shaped like a trapezoid. In this case, the width of the middle section 21 is half the sum of the lengths of the third side 213 and the fourth side 214.

[0095] The width of the first sub-portion 231 in the X-axis direction is a first width D1, that is, the width of the first sub-portion 231 in the first direction is the first width D1. The width of the middle portion 21 in the X-axis direction is a second width W1, that is, the distance between the midpoint of the first side 211 and the midpoint of the second side 212 of the middle portion 21 is the second width W1. The ratio of the first width D1 to the second width W1 can be between 0.19 and 0.32 (inclusive).

[0096] The width of the second sub-portion 232 in the X-axis direction can be the same as the width of the first sub-portion 231 in the X-axis direction, and the shape of the second sub-portion 232 can be mirror-symmetrical to the shape of the first sub-portion 231. The width of the second sub-portion 232 in the X-axis direction is the first width D1, that is, the width of the second sub-portion 232 in the first direction is the first width D1. The ratio of the first width D1 of the second sub-portion 232 to the second width W1 of the middle portion 21 can be between 0.19 and 0.32 (inclusive).

[0097] The width of the third sub-portion 233 in the Y-axis direction may be a third width D2, and the width of the middle portion 21 in the Y-axis direction may be a fourth width W2. The fourth width W2 is also the distance between the midpoint of the third side 213 and the midpoint of the fourth side 214. The ratio of the third width D2 to the fourth width W2 may be between 0.19 and 0.32 (inclusive).

[0098] The width of the fourth sub-portion 224 in the Y-axis direction can be the same as the width of the third sub-portion 223 in the Y-axis direction. The width of the fourth sub-portion 224 in the Y-axis direction is the third width D2. The ratio of the third width D2 of the fourth sub-portion 224 to the fourth width W2 of the middle portion 21 can be between 0.19 and 0.32 (inclusive).

[0099] It should be noted that the shape of the adhesive layer 20 is merely an illustrative example. In actual use, the specific shape of the adhesive layer 20 may be determined according to the shape of the anti-reflection film 30 .

[0100] Illustratively, the antireflection film 30 and the laminated glass 10 may be bonded together using the following process.

[0101] The first step is to cut the SCA optical glue and OCA optical glue into corresponding sizes respectively, tear off the light film of the SCA optical glue and OCA optical glue, first attach the SCA optical glue of the middle part 21 to the middle area of ​​the connecting surface 311 of the anti-reflection film 30, and then attach the OCA optical glue of the edge part 23 to the edge area of ​​the connecting surface 311 of the anti-reflection film 30, and then tear off the surface film on the side of the SCA optical glue and OCA optical glue away from the connecting surface 311.

[0102] In the second step, a robotic arm is used to stick the anti-reflection film 30 to the information collection area S1 of the laminated glass 10, and the anti-reflection film 30 and the laminated glass 10 are placed in a laminating machine for hot pressing lamination under a vacuum environment. The temperature range in the chamber of the laminating machine is between 60°C and 70°C (including the endpoint values ​​of 60°C and 70°C).

[0103] It should be noted that the laminating machine used is specially customized with a curvature matching the front windshield of vehicle 1000. Using a mechanical automated laminating process, the lower bracket of the laminating machine matches the corresponding profile and curvature of the front windshield. The laminating machine uses a pressing airbag to perform a progressive pressing operation, extending from the center outwards, on the coated surface 312 of the anti-reflection sheet 30. This ensures that bubbles are pressed out of the anti-reflection sheet 30 from the center outwards during the pressing process, with uniform force applied, thus avoiding issues such as glass fragmentation and the inability to expel bubbles.

[0104] The third step is to place the finished glass after bonding into the degassing machine. The parameters of the degassing machine are: the operating temperature range is between 50℃-60℃ (including the endpoint values ​​50℃ and 60℃), the operating pressure range is between 0.4MPa-0.6MPa (including the endpoint values ​​0.4MPa and 0.6MPa), and the degassing time is 30-40 minutes.

[0105] The fourth step is to put the finished glass into the UV curing machine with a curing energy of 4000MJ / cm 2 -5000MJ / cm 2 about.

[0106] It should be noted that after the colloid is UV cured, the middle portion 21 and the edge portion 23 are fused together at the joint without obvious boundaries, and the light distortion value of the information collection area S1 of the window glass 100 at the joint is ≤150mdpt.

[0107] The following describes specific examples of different ratios of the first width D1 of the first sub-portion 231 of the edge portion 23 and the second width W1 of the middle portion 21 of the adhesive layer 20 on the vehicle window glass 100 and different thicknesses of the adhesive layer 20 .

[0108] Example 1:

[0109] The vehicle window glass 100 in Example 1 includes a laminated glass 10 and an antireflection film 30 attached to the information collection area S1 of the laminated glass 10. The laminated glass 10, the adhesive layer 20, the substrate 31, and the antireflection film 32 are stacked in this order. The ratio of the first width D1 of the first subsection 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is 0.19. The thickness of the edge portion 23 and the middle portion 21 is 160 μm.

[0110] Examples 2-12 and Comparative Examples 1-15:

[0111] The vehicle window glass 100 of Example 2 has the same structure as the vehicle window glass 100 of Example 1, except that the thickness of the edge portion 23 and the middle portion 21 is 200 μm.

[0112] The vehicle window glass 100 of Example 3 has the same structure as the vehicle window glass 100 of Example 1, except that the thickness of the edge portion 23 and the middle portion 21 is 240 μm.

[0113] The vehicle window glass 100 of Example 4 has the same structure as that of Example 1, except that the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is 0.25.

[0114] The window glass 100 of Example 5 has the same structure as that of Example 2, except that the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is 0.25.

[0115] The structure of the vehicle window glass 100 of Example 6 is consistent with that of the vehicle window glass 100 of Example 3, except that the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is 0.25.

[0116] The vehicle window glass 100 of Example 7 has the same structure as that of Example 1, except that the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is 0.3.

[0117] The vehicle window glass 100 of Example 8 has the same structure as that of Example 2, except that the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is 0.3.

[0118] The vehicle window glass 100 of Example 9 has the same structure as that of Example 3, except that the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is 0.3.

[0119] The vehicle window glass 100 of Example 10 has the same structure as that of Example 1, except that the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is 0.32.

[0120] The structure of the vehicle window glass 100 of Example 11 is consistent with that of the vehicle window glass 100 of Example 2, except that the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is 0.32.

[0121] The structure of the vehicle window glass 100 of Example 12 is consistent with that of the vehicle window glass 100 of Example 3, except that the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is 0.32.

[0122] The window glass 100 of Comparative Example 1 has the same structure as the window glass 100 of Example 1, except that the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is 0.1.

[0123] The window glass 100 of Comparative Example 2 has the same structure as the window glass 100 of Example 2, except that the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is 0.1.

[0124] The window glass 100 of Comparative Example 3 has the same structure as the window glass 100 of Example 3, except that the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is 0.1.

[0125] The window glass 100 of Comparative Example 4 has the same structure as the window glass 100 of Example 1, except that the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is 0.15.

[0126] The window glass 100 of Comparative Example 5 has the same structure as the window glass 100 of Example 2, except that the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is 0.15.

[0127] The window glass 100 of Comparative Example 6 has the same structure as the window glass 100 of Example 3, except that the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is 0.15.

[0128] The window glass 100 of Comparative Example 7 has the same structure as the window glass 100 of Example 1, except that the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is 0.35.

[0129] The window glass 100 of Comparative Example 8 has the same structure as the window glass 100 of Example 2, except that the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is 0.35.

[0130] The window glass 100 of Comparative Example 9 has the same structure as the window glass 100 of Example 3, except that the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is 0.35.

[0131] The structure of the vehicle window glass 100 of Comparative Example 10 is consistent with that of the vehicle window glass 100 of Example 1, except that the adhesive layer 20 is an edge portion 23 .

[0132] The structure of the vehicle window glass 100 of Comparative Example 11 is consistent with that of the vehicle window glass 100 of Example 2, except that the adhesive layer 20 is an edge portion 23 .

[0133] The structure of the vehicle window glass 100 of Comparative Example 12 is consistent with that of the vehicle window glass 100 of Example 3, except that the adhesive layer 20 is an edge portion 23 .

[0134] The structure of the vehicle window glass 100 of Comparative Example 13 is consistent with that of the vehicle window glass 100 of Example 1, except that the adhesive layer 20 is the middle portion 21 .

[0135] The structure of the vehicle window glass 100 of Comparative Example 14 is consistent with that of the vehicle window glass 100 of Example 2, except that the adhesive layer 20 is in the middle portion 21 .

[0136] The structure of the vehicle window glass 100 of Comparative Example 15 is consistent with that of the vehicle window glass 100 of Example 3, except that the adhesive layer 20 is in the middle portion 21 .

[0137] Measure the optical indicators and adhesion indicators of the window glass 100 of Examples 1-12 and Comparative Examples 1-15. Optical indicators: Scanned using a moiré scanner, optical distortion is measured according to optical power, and optical power is expressed in milli-diopters (mpdt). Adhesion indicators: Tested using a tensile testing machine, the sample is symmetrically clamped on the fixture, the distance from the clamping point to the nearest bonding end is 50mm, the tensile testing machine is tested at a constant test speed, and the maximum load of the sample shear failure is recorded as the failure load. If the maximum load is greater than 210N / 25mm, it means that the adhesion strength meets the use requirements. The results are recorded in Table 1.

[0138] Table 1: Optical indexes and adhesive indexes of the vehicle window glass 100 of Examples 1-12 and Comparative Examples 1-15

[0139]

[0140]

[0141] The following conclusions can be drawn from the data in the table:

[0142] 1. If the adhesive layer 20 is made entirely of OCA optical adhesive at the edge portion 23 , even though the optical distortion value of the information collection area S1 of the vehicle window glass 100 is ≤150 mpdt, the bonding strength between the substrate 31 and the laminated glass 10 does not meet the use requirements.

[0143] 2. If the adhesive layer 20 is made entirely of SCA optical adhesive in the middle portion 21 , even though the bonding strength between the substrate 31 and the laminated glass 10 meets the requirements, the optical distortion value of the information collection area S1 of the vehicle window glass 100 is greater than 150 mpdt, which does not meet the requirements of the optical sensor assembly for the vehicle window glass 100 .

[0144] 3. If the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is greater than 0.32, for example, when D1 / W1 is 0.35, even though the optical distortion value of the information collection area S1 of the vehicle window glass 100 is ≤150mpdt, when the adhesive layer thickness is 160μm, the bond strength between the substrate 31 and the laminated glass 10 does not meet the required performance. This is because the bond strength of the cured edge portion 23 is relatively weak. As the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 gradually increases, the area of ​​the edge portion 23 used gradually increases, and the bond strength between the substrate 31 and the laminated glass 10 gradually decreases.

[0145] 4. If the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is less than 0.19, for example, when D1 / W1 are 0.1 and 0.15 respectively, although the bonding strength between the substrate 31 and the laminated glass 10 meets the requirements, the optical distortion value of the information collection area S1 of the vehicle window glass 100 is greater than 150 mpdt, which does not meet the requirements of the optical sensor assembly for the vehicle window glass 100.

[0146] 5. When the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is between 0.19 and 0.32, the optical distortion value of the information collection area S1 of the vehicle window glass 100 is ≤ 150 mpdt. The optical distortion results meet the requirements of the optical sensor assembly for the vehicle window glass 100, and the bonding strength between the anti-reflection sheet 30 and the laminated glass 10 meets the requirements. In particular, when the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is between 0.25 and 0.32, the optical distortion value of the information collection area S1 of the vehicle window glass 100 is substantially less than 100 mpdt.

[0147] 6. When the ratio of the first width D1 of the first subsection 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 remains unchanged, the optical distortion values ​​when the adhesive layer 20 has a thickness of 200 μm and 240 μm are slightly lower than when the adhesive layer 20 has a thickness of 160 μm. This is because as the thickness of the adhesive layer 20 increases, the anti-reflection sheet 30 is less affected by the bonding curvature, resulting in less optical distortion.

[0148] 7. As the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 gradually increases, the light distortion value of the information collection area S1 of the vehicle window glass 100 gradually decreases.

[0149] 8. Taking into account factors such as cost, bonding strength and light distortion, the ratio of the first width D1 of the first sub-portion 231 of the edge portion 23 of the adhesive layer 20 to the second width W1 of the middle portion 21 is preferably 0.19-0.32; the thickness of the adhesive layer 20 is preferably 160-240 μm.

[0150] In this embodiment, the antireflection film 32 is a coating structure. The antireflection film 32 includes a plurality of high refractive index layers and a plurality of low refractive index layers stacked together, with a low refractive index layer stacked between every two adjacent high refractive index layers, and a high refractive index layer stacked between every two adjacent low refractive index layers. Specifically, the number of layers of the antireflection film 32 is an even number. Starting from the fourth surface 132 of the inner glass plate 13, along the thickness direction (Z-axis direction) of the laminated glass 10, the odd-numbered layers are high refractive index layers, and the even-numbered layers are low refractive index layers. Among them, the refractive index of the high refractive index layer is in the range of 1.9-3.5 (including the endpoint values ​​1.9 and 3.5), and the refractive index of the low refractive index layer is in the range of 1.4-1.9 (including the endpoint values ​​1.4 and 1.9). The material of the high refractive index layer can be Si, NbO x 、SiN x 、ZrO x 、TiO x 、TiNx 、MoO x 、TaO x , HfO x The material of the low refractive index layer can be SiO x MgF x 、AlO x , WO x 、YF x 、BaF x The total thickness of the antireflection film 32 is 100-2000 nm. In one embodiment, the total thickness of the antireflection film 32 is 200-1200 nm. In another embodiment, the total thickness of the antireflection film 32 is 300-800 nm. Exemplarily, the number of film layers of the antireflection film 32 is 14, the high refractive index layer is made of Si3N4, and the low refractive index layer is made of SiO2. It should be noted that the antireflection film 32 can be designed to primarily enhance the transmittance of P-polarized light in the range of 800-1600 nm, or it can be designed to primarily enhance the transmittance of natural light in the range of 800-1600 nm.

[0151] In other embodiments, the antireflection film 32 may also be a multilayer polymer layer or a moth-eye film. A multilayer polymer layer is similar to a coating structure, and the principles of achieving enhanced transmission are similar to those of a coating structure. Multiple layers of polymer materials with different refractive indices are stacked together in a structure that alternates high and low refractive indices to achieve enhanced transmission. A moth-eye film utilizes the moth-eye effect, which occurs when the submicron structure on the surface of a material is smaller than the wavelength of light, rendering the microstructure indistinguishable to light waves. Consequently, the refractive index on the surface of the material varies continuously along the depth direction, reducing reflections caused by abrupt changes in refractive index, thereby achieving an antireflection effect.

[0152] See also Figure 8 The vehicle window glass 100 of this embodiment further includes a thermal insulation layer 40, which is laminated to the third surface 131 of the inner glass panel 13 or the second surface 112 of the outer glass panel 11. Specifically, the thermal insulation layer 40 is disposed on the laminated glass 10 at a location corresponding to the viewing area S21. Along the thickness direction (Z-axis direction) of the thermal insulation layer 40, the orthographic projection of the thermal insulation layer 40 on the laminated glass 10 completely overlaps with the viewing area S21 (the width and length of the thermal insulation layer 40 are equal to the width and length of the viewing area S21). The thermal insulation layer 40 can reflect infrared rays, providing heat insulation and sun protection for the viewing area S21. The thermal insulation layer 40 avoids the information collection area S1 on the laminated glass 10. In other embodiments, the thermal insulation layer 40 may partially overlap with the viewing area S21. For example, along the thickness direction (Z-axis direction) of the laminated glass 10, the orthographic projection of the thermal insulation layer 40 on the laminated glass 10 is located within the viewing area S21.

[0153] In this embodiment, the thermal insulation layer 40 is a functional metal layer, which includes multiple dielectric layers and one or more metal layers, each of which is located between two adjacent dielectric layers. In this application, "multiple" refers to two or more. On the one hand, the dielectric layer has the function of protecting the metal layer and preventing the metal layer from being oxidized. On the other hand, it can also adjust the optical properties, mechanical properties and reflection color of the vehicle window glass 100. The material of the metal layer can be a metal or metal alloy selected from at least one element of Ag, Au, Cu, Al, and Pt, and the material of the dielectric layer can be at least one of nitrides, oxides, and oxynitrides of metals such as zinc, Sn, Ti, Si, Al, Ni, Cr, Nb, Mg, Zr, Ga, Y, In, Sb, V, Ta, and their alloys.

[0154] To ensure high transmittance in the viewing area S21, a thermal insulation layer 40 need only be provided on either the second surface 112 of the outer glass plate 11 or the third surface 131 of the inner glass plate 13. In other embodiments, the thermal insulation layer 40 may also be a transparent conductive oxide coating or an infrared absorbing layer. This application does not impose strict restrictions on the material of the thermal insulation layer 40.

[0155] The laminated glass 10 is also provided with a shielding layer 50, which is laminated around the second surface 112 of the outer glass sheet 11 or the fourth surface 132 of the inner glass sheet 13. The shielding layer 50 is positioned on the laminated glass 10 at a location corresponding to the shielding area S22. Along the thickness direction (Z-axis) of the shielding layer 50, its orthographic projection on the laminated glass 10 completely overlaps with the shielding area S22 (the width and length of the shielding layer 50 are equal to those of the shielding area S22). The shielding layer 50 avoids the information collection area S1 on the laminated glass 10. The shielding layer 50 is typically made of ink and is used to shield and protect the internal components of the vehicle 1000, preventing them from aging and damage due to direct sunlight, thereby increasing their service life. The shielding layer 50 also shields the internal components of the vehicle 1000, ensuring an overall aesthetic appearance when viewed from the outside. In other embodiments, the shielding layer 50 may also partially overlap with the shielding area S22 . For example, along the thickness direction (Z-axis direction) of the laminated glass 10 , the orthographic projection of the shielding layer 50 on the laminated glass 10 is located within the shielding area S22 .

[0156] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A vehicle window glass, used in a vehicle, characterized in that: The laminated glass comprises an outer glass plate, an intermediate layer, and an inner glass plate, wherein the intermediate layer is sandwiched between the outer glass plate and the inner glass plate, the outer glass plate has a first surface and a second surface facing away from each other, the second surface facing the intermediate layer, and the inner glass plate has a third surface and a fourth surface facing away from each other, the third surface facing the intermediate layer; An antireflection sheet is provided on the fourth surface of the inner glass sheet, and the antireflection sheet is adhered to the fourth surface of the inner glass sheet via an adhesive layer. The antireflection sheet includes a substrate and an antireflection film laminated with the substrate. The adhesive layer adheres the substrate to the fourth surface of the inner glass sheet along the thickness direction of the laminated glass. The orthographic projection of the antireflection film on the information collection area covers the information collection area. The adhesive layer includes a middle portion and an edge portion, the edge portion is connected to the periphery of the middle portion, the edge portion adopts OCA optical adhesive, and the middle portion adopts SCA optical adhesive.

2. The vehicle window glass according to claim 1, characterized in that The OCA optical adhesive is an acrylic adhesive.

3. The vehicle window glass according to claim 2, characterized in that The SCA optical adhesive in the middle part includes the following components in parts by weight: 65 to 75 parts of EVA resin, 15 to 25 parts of acrylate oligomer, 2 to 5 parts of viscosity regulator, 2 to 4 parts of plasticizer, 0.5 to 2 parts of cross-linking agent, 0.3 to 1 part of coupling agent, 0.5 to 1.5 parts of photoinitiator, 0.2 to 1 part of defoaming agent, and 0.2 to 1 part of antioxidant.

4. The vehicle window glass according to claim 3, characterized in that The SCA optical adhesive in the middle portion further comprises 0 to 0.5 parts of a polymerization inhibitor by weight.

5. The vehicle window glass according to claim 4, characterized in that The polymerization inhibitor includes one or a combination of two or more of hydroquinone, p-methoxyphenol, methylhydroquinone and p-hydroxyanisole.

6. The vehicle window glass according to claim 3, characterized in that The acrylate oligomer includes one or a combination of two or more of bisphenol A epoxy acrylate, polyurethane acrylate, polyester acrylate, polyether acrylate, tripropylene glycol diacrylate, 1,6-hexanediol diacrylate, octafluoropentyl methacrylate, and trifluoroethanol acrylate; and / or The viscosity modifier includes one or a combination of two or more of microcrystalline wax, paraffin wax, polyethylene wax, oxidized polyethylene wax, polypropylene wax, and APAO; and / or The plasticizer includes one or a combination of two or more of adipic acid ester compounds, phthalic acid ester compounds, and phosphate esters; and / or The cross-linking agent includes one or a combination of two or more of di-tert-butyl peroxide, 2,5-dimethyl-2,5-di-tert-butyl peroxide hexane, diisopropylbenzene hydroperoxide, and benzoyl peroxide; and / or The coupling agent includes one or a combination of two or more of a silane coupling agent, a sulfur silane coupling agent, an amino silane coupling agent, and an epoxy silane coupling agent; and / or The photoinitiator includes one or a combination of two or more of 2-hydroxy-2-methyl-1-phenyl-1-propanone, benzoin and its derivatives, benzil derivatives, dialkoxyacetophenone, α-hydroxyalkyl phenone, benzophenone and its derivatives, vinyl sulfide compounds, diazonium salts, diaryliodonium salts, triarylsulfonium salts, alkylsulfonium salts, and iron arene salts; and / or The defoaming agent comprises one or a combination of two or more of methyltrimethoxysilane, hydroxyvinyl oligosiloxane and foam-breaking polysiloxane; and / or The antioxidant includes one or a combination of two or more of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]pentaerythritol, tris(2,4-di-tert-butyl)phenyl phosphite, triphenyl phosphate, and methyl parahydroxybenzoate.

7. The vehicle window glass according to claim 1, characterized in that The edge portion includes a first sub-portion and a second sub-portion arranged opposite to each other along a first direction, the first direction being the width direction of the adhesive layer, the first sub-portion and the second sub-portion being located on opposite sides of the middle portion respectively; The width of the first sub-portion in the first direction is a first width, the middle portion includes a first side and a second side arranged opposite to each other in the first direction, the distance between the midpoints of the first side and the second side is a second width, and the ratio of the first width to the second width is between 0.19 and 0.32; and / or, The width of the second sub-portion in the first direction is the first width, the middle portion includes a first side and a second side arranged opposite to each other in the first direction, the distance between the midpoints of the first side and the second side is the second width, and the ratio of the first width to the second width is between 0.19-0.

32.

8. The vehicle window glass according to claim 1, wherein: The middle portion and the edge portion of the adhesive layer have the same thickness, and the thickness of the middle portion and the edge portion is 120-280 μm.

9. The vehicle window glass according to claim 1, characterized in that The thickness of the substrate is 0.3-1.5 mm.

10. The vehicle window glass according to claim 1, wherein: The thickness of the antireflection film is 100-2000 nm.

11. The vehicle window glass according to claim 1, wherein: The transmittance of the laminated glass to light with a wavelength of 800-1600 nm is greater than or equal to 88%.

12. The vehicle window glass according to claim 1, wherein: The transmittance of the adhesive layer to light with a wavelength of 800-1600 nm is greater than or equal to 98%.

13. The vehicle window glass according to claim 1, wherein: The refractive index of the adhesive layer to light with a wavelength of 800-1600 nm is 1.46-1.

49.

14. The vehicle window glass according to claim 1, wherein The substrate includes a peripheral side surface, and a connecting surface and a coating surface arranged opposite to each other. The connecting surface is connected to the fourth surface of the inner glass plate through the adhesive layer, and the coating surface is connected to the anti-reflection film. The peripheral side surface is arranged around the connecting surface and the coating surface, and the angle between the connecting surface and the peripheral side surface is 90°.

15. The vehicle window glass according to claim 1, characterized in that Measured from one side of the first surface, the Lab value of the visible light reflection color of the information collection area is: a value is -3 to +3, and b value is -3 to +3.

16. A vehicle, characterized in that: The invention comprises an optical sensor assembly, a vehicle body and the vehicle window glass according to any one of claims 1 to 15, wherein the vehicle window glass is connected to the vehicle body, the optical sensor assembly is connected inside the vehicle body, and the optical signal of the optical sensor assembly can pass through the vehicle window glass.

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