Window glass for vehicle

Abstract

Provided is a vehicle window glass capable of maintaining the strength of a laminated glass while ensuring a field of view even when a functional member is sealed in the laminated glass. A vehicle window glass according to one embodiment of the present disclosure has a first glass plate (11), a second glass plate (12), an intermediate layer (13) sandwiched between the first glass plate (11) and the second glass plate (12), and a functional member (14) disposed on the opposite side of the first glass plate (11) with respect to the intermediate layer (13). In the functional member (14), a dielectric layer (21) and a conductor layer (22) are laminated in this order from the side closer to the intermediate layer (13). Furthermore, in a plan view of the first glass plate (11), the functional member (14) has a linear part (16) and a filling part (17) surrounded by the linear part (16) and filled with the material of the intermediate layer (13) in the thickness direction of the functional member (14).

Description

Technical Field

[0001] The present invention relates to a vehicle window glass. Background Art

[0002] In recent years, the development of vehicles that can achieve high-capacity communications using 4G-LTE / 5G band radio waves for infotainment and high-level autonomous driving has been accelerated in mobile vehicles such as automobiles. Therefore, there is a trend to install antennas with conductors on vehicles to transmit and receive radio waves in specified frequency bands.

[0003] For example, in order to obtain information in front of the vehicle, people have also studied the situation of mounting such antennas on vehicle window glass such as windshields. From the perspective of safety, the law stipulates that the windshield of a motor vehicle must use laminated glass formed by sandwiching an intermediate layer between two glass plates, and it is known to seal the antenna inside such laminated glass.

[0004] For example, Patent Document 1 discloses a structure in which an antenna for terrestrial bands II to V is arranged inside a composite glass plate and powered by a flat conductor. In addition, Patent Documents 2 and 3 disclose a structure in which an antenna suitable for transmitting and receiving high-frequency radio waves such as millimeter waves (e.g., 28 GHz) is arranged inside laminated glass or multilayer glass and connected via a transmission line or signal conductor and powered from the outside of the glass. Prior art literature Patent Literature

[0005] Patent Document 1: Japanese Patent Publication No. 2014-514836 Patent Document 2: International Publication No. 2020 / 230819 Patent Document 3: Japanese Patent Publication No. 2021-519524 Summary of the invention Technical problem to be solved by the invention

[0006] When a film-shaped antenna is enclosed in a laminated glass as described above, the area of ​​the antenna makes it difficult to ensure the field of vision of the passengers. Therefore, for example, a mesh-shaped conductor is formed as disclosed in Patent Document 2, and gaps are formed between the conductors to ensure the field of vision. However, if such a film-shaped antenna (functional component) is enclosed, it is difficult for the laminated glass to maintain the required strength, and the safety of the laminated glass may not be ensured.

[0007] Based on the above technical problems, an object of the present invention is to provide a vehicle window glass which can maintain the strength of the laminated glass while ensuring the field of vision even when a functional component is sealed in the laminated glass. Technical solutions adopted to solve technical problems

[0008] A vehicle window glass according to one aspect of the present disclosure has the following configuration. [1] A vehicle window glass having: a first glass plate, a second glass plate, a first intermediate layer sandwiched between the first glass plate and the second glass plate, a functional member disposed on the side opposite to the first glass plate with respect to the first intermediate layer, in the functional member, a dielectric layer and a conductor layer are sequentially stacked starting from the side closer to the first glass plate, in a plan view of the first glass plate, the functional member has a linear portion and a filling portion surrounded by the linear portion and filled with the material of the first intermediate layer in the thickness direction of the functional member. [2] The vehicle window glass according to [1], wherein in the functional member, a dielectric layer, a conductor layer, and an adhesive layer are sequentially stacked starting from the side closer to the first glass plate. [3] The vehicle window glass according to [1] or [2], wherein in a plan view of the first glass plate, the line width of the linear portion in the functional member is 7 mm or less. [4] The vehicle window glass according to any one of [1] to [3], wherein in a plan view of the first glass plate, when a rectangular region including the minimum area of the functional member is given, the length of at least one side of the rectangular region is 25 mm or more. [5] The vehicle window glass according to any one of [1] to [4], wherein in a plan view of the first glass plate, in a functional member region surrounded by the outer edge of the functional member, the filling portions are arranged in a matrix along two orthogonal side directions. [6] The vehicle window glass according to any one of [1] to [4], wherein in a plan view of the first glass plate, the filling portions are arranged with an irregular outer edge shape in a region including the functional member. [7] The vehicle window glass according to any one of [1] to [6], wherein in a plan view of the first glass plate, the filling portion has a length of 1 mm or more. [8] The vehicle window glass according to any one of [1] to [7], wherein, in a plan view of the first glass plate, among the functional members, the ratio of the area of the filling portion to the area of the region surrounded by the outer edge of the functional member is in the range of 4.5% to 45%. [9] The vehicle window glass according to any one of [1] to [8], wherein, in a plan view of the first glass plate, the outer edge of the dielectric layer has a portion disposed more outward than the outer edge of the conductor layer.

[10] The vehicle window glass according to any one of [1] to [9], wherein, in a plan view of the first glass plate, the conductor layer constituting the linear portion includes a portion formed of a mesh of fine lines inside the linear portion.

[11] The vehicle window glass according to any one of [1] to

[10] , wherein the functional member is an antenna capable of transmitting and receiving radio waves of a specified frequency.

[12] The vehicle window glass according to

[11] , wherein the antenna has a power supply electrode and a ground electrode on the conductor layer.

[13] The vehicle window glass according to

[12] , wherein a transmission line connected to the power supply electrode and the ground electrode and led out from an end portion between the first glass plate and the second glass plate is disposed between the first intermediate layer and the second glass plate.

[14] The vehicle window glass according to

[12] , wherein a capacitively coupled power supply conductor portion disposed to face the power supply electrode and a capacitively coupled ground conductor portion disposed to face the ground electrode in a plan view of the first glass plate are disposed on a main surface of the second glass plate on the side opposite to the first intermediate layer.

[15] The vehicle window glass according to any one of [1] to

[14] , wherein a second intermediate layer is disposed between the functional member and the second glass plate.

[16] The vehicle window glass according to

[15] , wherein the second intermediate layer is made of the same material as the first intermediate layer.

[17] The vehicle window glass according to any one of [1] to

[16] is applicable to at least one of a windshield, a rear window, a side window, and a sunroof of a vehicle. Advantages of the Invention

[0026] According to the present disclosure, a vehicle window glass can be provided which can maintain the strength of the laminated glass while ensuring the field of view even when a functional member is encapsulated in the laminated glass. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The figure shows a cross-sectional view of a configuration example of a vehicle window glass according to an embodiment. Figure 2 The figure shows a top view of a configuration example of a functional member. Figure 3 The figure shows a top view of a configuration example of a functional member. Figure 4 The figure shows Figure 2 an enlarged top view of region A of Figure 5 The figure shows a cross-sectional view of an example of a manufacturing process of a vehicle window glass according to an embodiment. Figure 6 The figure shows a top view of another configuration example of a functional member. Figure 7 The figure shows a cross-sectional view of another configuration example of a vehicle window glass according to an embodiment. Figure 8 The figure shows a cross-sectional view of another configuration example of a vehicle window glass according to an embodiment. Figure 9 The figure shows a cross-sectional view of another configuration example of a vehicle window glass according to an embodiment. Figure 10 The figure shows a cross-sectional view of another configuration example of a vehicle window glass according to an embodiment. Figure 11 The figure shows a cross-sectional view of the configuration of a vehicle window glass according to Example 2. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Embodiments will be described below with reference to the drawings. Figure 1 The figure shows a cross-sectional view of a configuration example of a vehicle window glass according to an embodiment. Figure 2 The figure shows a top view of a configuration example of a functional member. Figure 1 The figure shows Figure 2 a cross-sectional view taken along cutting line I-I shown in

[0029] As Figure 1 shown, the vehicle window glass 1 according to the present embodiment includes a first glass plate 11, a second glass plate 12, an intermediate layer (first intermediate layer) 13 sandwiched between the first glass plate 11 and the second glass plate 12, and a functional member 14 disposed on the opposite side of the first glass plate 11 with respect to the intermediate layer 13. The vehicle window glass 1 according to the present embodiment can be applied to, for example, at least one of a windshield, a rear window, a side window, and a sunroof of a vehicle.

[0030] The vehicle window glass 1 of the present embodiment may be planar or curved. In addition, it may also be a shape including both a plane and a curved surface. The first glass plate 11 and the second glass plate 12 may each be a flat plate or a curved plate. The curved plate may be a single-curved shape curved in one direction or a three-dimensional shape curved in two or more directions. The three-dimensional shape may be, for example, a multi-curved shape curved in two orthogonal directions. The following example describes the case where both the first glass plate 11 and the second glass plate 12 are configured as flat plates, but the same description can also be applied to the case where at least one is configured as a curved plate.

[0031] The outer edge shape of the first glass plate 11 and the second glass plate 12 in a top view can be any shape, for example, preferably a rectangle, a trapezoid, or a triangle. For example, the first glass plate 11 is disposed on the vehicle outer side, and the second glass plate 12 is disposed on the vehicle inner side.

[0032] The first and second glass plates 11 and 12 can be made of, for example, transparent inorganic glass. The first and second glass plates 11 and 12 can be made of, for example, soda-lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, quartz glass, etc. The first and second glass plates 11 and 12 are manufactured by, for example, the float method, the fusion method, etc., but are not limited to these manufacturing methods.

[0033] The thickness of each of the first and second glass plates 11 and 12 is, for example, 0.1 mm to 10 mm, preferably 0.3 mm to 3.0 mm, more preferably 1.1 mm to 2.6 mm, and further preferably 1.7 mm to 2.1 mm from the viewpoint of resistance to flying stones. The thicknesses of the first and second glass plates 11 and 12 may be the same as each other or different from each other. For example, the thickness of the first glass plate 11 disposed on the vehicle outer side can be made thicker than the thickness of the second glass plate 12 disposed on the vehicle inner side. In the case of thickening the thickness of the first glass plate 11 disposed on the vehicle outer side in this way, the strength of the vehicle window glass 1 against an object flying toward the vehicle window glass 1 is improved.

[0034] The intermediate layer 13 is disposed to be sandwiched between the first glass plate 11 and the second glass plate 12. The thickness of the intermediate layer 13 is not particularly limited, and is preferably 1.10 mm or less, for example. In addition, the thickness of the intermediate layer 13 is preferably 0.50 mm or more, and more preferably 0.70 mm or more. By making the thickness of the intermediate layer 13 within this range, the transparency of the vehicle window glass can be ensured, and the weight of the vehicle window glass can be suppressed from becoming too large.

[0035] The intermediate layer 13 can be made of a material including, for example, polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), cycloolefin polymer, polyurethane resin, polyvinylidene fluoride resin (PVDF), etc.

[0036] The functional member 14 is disposed on the opposite side of the first glass plate 11 with respect to the intermediate layer 13. In Figure 1 the illustrated configuration example, in the functional member 14, a dielectric layer 21, a conductor layer 22, and an adhesive layer 23 are sequentially stacked from the side closer to the intermediate layer 13, that is, the side closer to the first glass plate 11. In addition, in the present embodiment, the essential components constituting the functional member 14 are the dielectric layer 21 and the conductor layer 22, and the adhesive layer 23 may be omitted. In this case, in the functional member 14, the dielectric layer 21 and the conductor layer 22 are sequentially stacked from the side closer to the intermediate layer 13. Further, in a plan view of the first glass plate 11, the functional member 14 has a linear portion 16 and a filling portion 17. The filling portion 17 is surrounded by the linear portion 16 and is filled with the material of the intermediate layer 13 in the thickness direction of the functional member 14. In addition, in the case where the filling portion 17 is not included (that is, in the case of only the linear portion 16), Figure 1 the illustrated cross-sectional view is the cross-sectional shape in which the layers of the functional member 14 are continuous in the horizontal direction.

[0037] Figure 2 The illustrated plan configuration diagram of the functional member 14 shows that the functional member 14 includes a linear portion 16 and a filling portion 17 surrounded by the linear portion 16. Figure 2 The illustrated functional member 14 is an antenna that can transmit and receive radio waves of a specified frequency. The functional member 14 includes a power supply electrode 31 and a ground electrode 32. In addition, the filling portion 17 is a void portion in the case where the material of the intermediate layer 13 is not filled. In addition, in the present embodiment, an antenna is described as an example of the functional member 14, but a member having other functions may also be used as the functional member 14. That is, in the present embodiment, any functional member may be used as long as it has a linear portion 16 and a filling portion (void portion) 17.

[0038] The dielectric layer 21 included in the functional member 14 (refer to Figure 1 ) may be formed of a resin film having a specified thickness. For example, the dielectric layer 21 may be formed of a TAC (triacetyl cellulose) film.

[0039] The conductor layer 22 may be formed of a mesh conductor. For example, the conductor layer 22 may be formed of a mesh copper foil, an aluminum foil, or the like. By using a mesh conductor to form the conductor layer 22, the field of view of the occupant can be ensured. The shape of the conductor layer 22 (the shape of the antenna) may be determined according to the frequency band of the transmitted and received radio waves. In addition, in the present specification, the mesh shape formed by the linear portion 16 and the filling portion (void portion) 17 is referred to as "mesh".

[0040] The adhesive layer 23 can be formed of, for example, a transparent adhesive material, that is, an optical adhesive material (OCA: Optical Clear Adhesive). The adhesive layer 23 can use, for example, acrylic, silicone, epoxy, or urethane acrylate optical adhesive materials.

[0041] For example, in the present embodiment, the conductor layer 22 and the adhesive layer 23 can be laminated on the dielectric layer 21, and the laminate can be cut with a mold having an antenna pattern (refer to Figure 2 ) to form the functional member (antenna) 14.

[0042] As Figure 1 , Figure 2 shown, in the functional member 14 of the present embodiment, in the plan view of the first glass plate 11, the line width W1 of the linear portion 16 is preferably 7 mm or less, more preferably 5 mm or less, and further preferably 1 mm or less. In addition, the length W2 of the filling portion 17 is preferably 1 mm or more, more preferably 3 mm or more, and further preferably 4 mm or more in the plan view of the first glass plate 11. In addition, in the functional member 14, in the plan view of the first glass plate 11, the ratio of the area of the filling portion 17 to the area of the region surrounded by the outer edge of the functional member 14 is preferably in the range of 4.5% to 45%, more preferably in the range of 20% to 45%, and further preferably in the range of 30% to 45%. With such a configuration, the strength required for the laminated glass can be maintained, and the safety of the laminated glass can be ensured.

[0043] In addition, as Figure 3 shown, in the functional member 14, in the plan view of the first glass plate 11, when a rectangular region 38 including the minimum area of the functional member 14 is given, the length of at least one side of the rectangular region 38 is preferably 25 mm or more, more preferably 30 mm or more, and further preferably 40 mm or more. In addition, the maximum value of the length of one side is not particularly limited, and for example, 150 mm or less can be cited.

[0044] Figure 4 Shown is Figure 2 an enlarged plan view of the region A of Figure 4As shown, in this embodiment, when viewed from above the first glass plate 11, the conductor layer 22 constituting the linear portion 16 may include a portion formed of a network of thin lines inside the linear portion 16. Thus, by forming the linear portion 16 of a network of thin lines, the transparency of the functional member 14 can be improved, ensuring the field of view of the occupants. That is, in this embodiment, by forming the linear portion 16 and the filling portion (void portion) 17 in a network pattern and forming the linear portion 16 of a network of thin lines, the transparency of the functional member 14 can be effectively improved, ensuring the field of view of the occupants. In addition, the width of the network of thin lines may be in the range of, for example, 0.01 mm to 0.1 mm. The strength required for the laminated glass can be further maintained, ensuring the safety of the laminated glass. Further, in this embodiment, the linear portion 16 may not be in a network pattern, and in this case, it may be formed of rigid thin lines. In addition, the width of the rigid thin lines may be in the range of, for example, 0.5 mm to 4.0 mm.

[0045] In addition, as Figure 2 shown, when viewed from above the first glass plate 11, in the functional member region surrounded by the outer edge of the functional member 14, the filling portions 17 may be arranged in a matrix along two orthogonal edge directions. Among them, the two orthogonal edge directions are not limited to being arranged along the two edges of the outer edge of the rectangular region 38, and can be set to any direction. For example, the two orthogonal edge directions may be directions at an angle of 45° with respect to the outer edge of the rectangular region 38 to arrange the filling portions 17 in a matrix. In addition, when viewed from above the first glass plate 17, the filling portions 17 may be arranged with an irregular outer edge shape in the region including the functional member 14. In other words, the filling portions 17 may be randomly arranged in the region including the functional member 14.

[0046] In this embodiment, when forming the vehicle window glass 1, the first glass plate 11, the intermediate layer 13, the functional member 14, and the second glass plate 12 are sequentially laminated and placed in a vacuum bag such as a rubber bag. Subsequently, the vacuum bag is connected to an exhaust system, and the pressure is reduced by evacuation (degassing) until the pressure inside the vacuum bag reaches a degree of vacuum (absolute pressure) of about -65 kPa to -100 kPa, and heating and pressing are performed at a temperature of about 70°C to 110°C. Further, a crimping process of heating and pressing is performed under the conditions of a temperature of about 100°C to 140°C and a pressure of 0.6 MPa to 1.3 MPa, and a vehicle window glass 1 with excellent durability can be obtained. In addition, the method for forming the vehicle window glass 1 is not limited to this method, and other manufacturing methods may also be used to form the vehicle window glass 1.

[0047] Figure 5 The figure shows a cross-sectional view of an example of the manufacturing process of the vehicle window glass of this embodiment. As Figure 5As shown in the upper figure above, before heating and pressing, the filling portion 17 of the functional member 14 is a void. After that, the laminate is heated and pressed so that the intermediate layer 13 melts, and a part of the intermediate layer 13 flows into the filling portion 17, resulting in a vehicle window glass 1 having the configuration shown in the lower figure below. Figure 5 The vehicle window glass 1 shown in the lower figure below.

[0048] At this time, the material of the intermediate layer 13 filled in the filling portion 17 reaches the second glass plate 12 and bonds to the second glass plate 12. Thus, the strength of the vehicle window glass 1 can be maintained. Therefore, according to the present embodiment, a vehicle window glass can be provided that can maintain the strength of the laminated glass while ensuring visibility even when a functional member is enclosed in the laminated glass.

[0049] In addition, in the present embodiment, as Figure 1 , Figure 2 shown, since the conductor layer 22 has the linear portion 16, it is weaker against external stimuli (collision with a hard object, pulling). That is, the linear portion 16 of the conductor layer 22 is likely to be damaged due to external stimuli. Therefore, by laminating the dielectric layer 21, the conductor layer 22, and the adhesive layer 23 in this order from the side closer to the first glass plate 11, the breakage of the linear portion 16 caused by external stimuli can be suppressed.

[0050] Furthermore, when the vehicle window glass 1 is a laminated glass and the functional member 14 is enclosed in the laminated glass by the above method, since the adhesive layer 23 is provided on the second glass plate 12 side, not only the positioning accuracy inside the laminated glass is improved, but also the operability is greatly improved. Further, in the process of forming the laminated glass, the position deviation of the functional member 14 can also be suppressed.

[0051] Figure 6 shown is a top view of another configuration example of the functional member 14. In the present embodiment, the outer edge of the dielectric layer 21 may have a portion disposed more outside than the outer edge of the conductor layer 22. In such a configuration, when arranging the functional member 14, the operation can be performed by fixing the dielectric layer 21 (TAC film), so the operation of the functional member 14 during manufacturing becomes easy. In addition, Figure 6 in the functional member 14 shown, the filling portion 17 is also a void. In addition, the dielectric layer 21 disposed more outside than the outer edge of the conductor layer 22 is transparent to visible light, so the visibility of the passengers can also be ensured.

[0052] Figure 7 shown is a cross-sectional view of another configuration example of the vehicle window glass according to the embodiment. Figure 7In the vehicle window glass 2 shown, an intermediate layer (second intermediate layer) 18 is disposed between the functional member 14 and the second glass plate 12. For example, the intermediate layer 18 may be made of the same material as the intermediate layer 13. In particular, if the intermediate layer 18 and the intermediate layer 13 are of the same material, it is preferable in terms of suppressing deformation caused by temperature changes and the like because they have the same coefficient of linear expansion.

[0053] When forming Figure 7 the vehicle window glass 2 shown, the first glass plate 11, the intermediate layer 13, the functional member 14, the intermediate layer 18, and the second glass plate 12 are laminated in this order. Thereafter, the laminate is heated and pressed so that the intermediate layers 13 and 18 are melted, a part of the intermediate layers 13 and 18 flows into the filling portion 17, and at the same time, the intermediate layers 13 and 18 are joined to each other to form Figure 7 the vehicle window glass 2 having the configuration shown.

[0054] Figure 8 Shown is a cross-sectional view of another configuration example of the vehicle window glass of the embodiment. Figure 8 The vehicle window glass 3 shown includes an antenna as the functional member 14, and the antenna includes a power supply electrode 31 and a ground electrode 32. Between the intermediate layer 13 and the second glass plate 12, a transmission line 43 that is connected to the power supply electrode 31 and the ground electrode 32 and is led out from an end portion between the first glass plate 11 and the second glass plate 12 is disposed. In addition, Figure 8 Shown is a configuration in which the transmission line 43 is connected to the ground electrode 32, but the power supply electrode 31 is connected to another transmission line (not shown). Further, Figure 8 The illustration of the filling portion 17 is omitted.

[0055] Figure 9 Shown is a cross-sectional view of another configuration example of the vehicle window glass of the embodiment. Figure 9 The vehicle window glass 4 shown includes an antenna as the functional member 14, and the antenna includes a power supply electrode 51 and a ground electrode 52. On the main surface of the second glass plate 12 on the side opposite to the intermediate layer 13, a capacitively coupled power supply conductor portion 53 that is disposed to face the power supply electrode 31 in a plan view of the first glass plate 11 and a capacitively coupled ground conductor portion 54 that is disposed to face the ground electrode 32 are disposed. Although Figure 9 is omitted, there is a transmission line connected to the power supply conductor portion 53 and the ground conductor portion 54. In addition, Figure 9 The illustration of the filling portion 17 is omitted.

[0056] Figure 10 Shown is a cross-sectional view of another configuration example of the vehicle window glass of the embodiment. Figure 10In the vehicle window glass 5 shown, a resin layer 25 for protecting the conductor layer 22 is arranged between the conductor layer 22 and the adhesive layer 23 of the functional component 14. The resin layer 25 is arranged between the conductor layer 22 and the adhesive layer 23, so that the conductor layer 22 can be effectively protected from external stimulation. For example, as a material constituting the resin layer 25, a transparent resist or the like can be cited. Example

[0057] Next, examples are described.

[0058] <Example 1> As a sample of Example 1, prepare Figure 1 Specifically, as the first glass plate 11 and the second glass plate 12, soda-lime glass plates with a length of 300 mm, a width of 300 mm, and a thickness of 2 mm are prepared. In addition, the soda-lime glass is a glass in which the molar percentage of the oxide basis of each component satisfies the following range. 50%≤SiO2≤80% 0.1%≤Al2O3≤25% 3%≤R2O≤30% (R2O represents the total amount of Li2O, Na2O, and K2O) 0%≤B2O3≤10% 0%≤MgO≤25% 0%≤CaO≤25% 0%≤SrO≤5% 0%≤BaO≤5% 0%≤ZrO2≤5% 0%≤SnO2≤5%

[0059] In addition, as the intermediate layer 13, a PVB film with a length of 300 mm, a width of 300 mm, and a thickness of 0.76 mm was prepared. In addition, as the functional component 14, an antenna with a length of 50 mm and a width of 126 mm was prepared. The dielectric layer 21 of the functional component 14 used a TAC film with a thickness of 0.020 mm, the conductor layer 22 used a copper foil with a thickness of 0.002 mm, and the adhesive layer 23 used an OCA with a thickness of 0.025 mm. The conductor layer 22 had a line width of 1 mm, a lateral spacing of 5 mm, and a longitudinal spacing of 4 mm.

[0060] After that, the first glass plate 11, the intermediate layer 13, the functional component 14, and the second glass plate 12 were stacked in sequence, placed in a vacuum bag, and subjected to heat and pressure treatment at a pressure of 1 MPa and a temperature of 110° C. to produce the vehicle window glass of Example 1. At this time, the functional component 14 was arranged at the center of the first glass plate 11 in a top view of the first glass plate 11. The three samples of Example 1 are shown as Examples 1-1 to 1-3, respectively. Among them, all the samples of Examples 1-1 to 1-3 were produced under the same conditions.

[0061] <Example 2> As a sample of Example 2, a vehicle window glass 101 having the configuration shown below was fabricated. Figure 11 The vehicle window glass 101 shown below includes a first glass plate 111, an intermediate layer 113, a functional member 114, and a second glass plate 112. The functional member 114 includes a dielectric layer 121, a conductor layer 122, and an adhesive layer 123. In the sample of Example 2, the conductor layer 122 has a configuration without a filling portion 17. Figure 11 Specifically, as the first glass plate 111 and the second glass plate 112, glass plates of soda-lime glass with a length of 300 mm, a width of 300 mm, and a thickness of 2 mm (the same as in Example 1) were prepared. In addition, as the intermediate layer 113, a PVB film with a length of 300 mm, a width of 300 mm, and a thickness of 0.76 mm was prepared. In addition, as the functional member 114, an antenna with a length of 50 mm and a width of 126 mm was prepared. For the dielectric layer 121 of the functional member 114, a TAC film with a thickness of 0.020 mm was used, for the conductor layer 122, a copper foil with a thickness of 0.002 mm was used, and for the adhesive layer 123, an OCA with a thickness of 0.025 mm was used.

[0062] After that, the first glass plate 111, the intermediate layer 113, the functional member 114, and the second glass plate 112 were laminated in sequence. In addition, in Example 2, a PVB film with a thickness of 25 μm was provided between the functional member 114 and the second glass plate 112. The laminate was placed in a vacuum bag and subjected to heat and pressure treatment at a pressure of 1 MPa and a temperature of 110 °C to fabricate the vehicle window glass of Example 2. At this time, the functional member 114 is disposed at the center of the first glass plate 111 in the plan view of the first glass plate 111. Three samples of Example 2 are respectively shown as Example 2-1 to 1-3. Among them, the samples of Example 2-1 to 1-3 were all prepared under the same conditions.

[0063] <Impact Resistance Test>

[0064] The impact resistance test was performed on the samples of Example 1 and Example 2. Specifically, each sample was stored at a temperature of -20 °C for 4 hours. After that, the samples were arranged in the horizontally supported indicating frame with the first glass plates 11 and 111 facing upward. Then, a steel ball with a diameter of 38 mm and a weight of 227 g was dropped from a height of 9 m onto the samples to perform the impact resistance test. After that, if the steel ball did not penetrate the sample and the total weight of the peeled pieces was 15 g or less, it was judged as qualified.

[0065] <Test Results> The test results are shown in Table 1. As shown in Table 1, in the samples of Examples 1-1 to 1-3, the total weight of the release sheet was 15 g or less, and all the samples were judged to be qualified. In the samples of Examples 2-1 to 2-3, the total weight of the release sheet was more than 15 g, and all the samples were judged to be unqualified. In addition, in the sample of Example 2-3, the steel ball penetrated. The reason for judging the samples of Examples 2-1 to 2-3 to be unqualified is that the adhesive strength of the adhesive layer 123 (OCA) decreased when the samples were stored at low temperature. In the samples of Examples 1-1 to 1-3, it is considered that the PVB filled in the filling portion 17 is bonded to the second glass plate 12, so the strength of the vehicle window glass 1 is maintained.

[0066] [Table 1] Sample Total weight of the release sheet Judgment Example 1-1 0.10g Qualified Example 1-2 0.40g Qualified Example 1-3 0.40g Qualified Example 2-1 24.10g Unqualified Example 2-2 16.30g Unqualified Example 2-3 22.1 g (penetration) Unqualified

[0067] The present invention has been described above with respect to the above-described embodiments. However, the present invention is not limited to the configurations of the above-described embodiments, and the scope of the invention of the claims in the claims of the present application clearly includes various modifications, corrections, and combinations that can be made by those skilled in the art.

[0068] This application claims priority based on Japanese Patent Application No. 2022-175535 filed on November 1, 2022, the entire disclosure of which is incorporated herein. Symbol Explanation

[0069] 1, 2, 3, 4, 5 Vehicle window glass 11 First glass plate 12 Second glass plate 13 Intermediate layer (first intermediate layer) 14 Functional member 16 Linear portion 17 Filling portion 18 Intermediate layer (second intermediate layer) 21 Dielectric layer 22 Conductor layer 23 Adhesive layer 25 Resin layer 31 Power supply electrode 32 Ground electrode 38 Rectangular area 43 Transmission line 53 Power supply conductor portion 54 Ground conductor portion.

Claims

1. A window glass for a vehicle, comprising: a first glass plate, a second glass plate, a first intermediate layer sandwiched between the first glass plate and the second glass plate, a functional member disposed on the opposite side of the first glass plate with respect to the first intermediate layer, in the functional member, a dielectric layer and a conductor layer are sequentially laminated starting from the side closer to the first glass plate, in a plan view of the first glass plate, the functional member has a linear portion and a filling portion surrounded by the linear portion and filled with the material of the first intermediate layer in the thickness direction of the functional member.

2. The window glass for a vehicle according to claim 1, wherein, in the functional member, the dielectric layer, the conductor layer, and an adhesive layer are sequentially laminated starting from the side closer to the first glass plate.

3. The window glass for a vehicle according to claim 1 or 2, wherein, in a plan view of the first glass plate, in the functional member, the line width of the linear portion is 7 mm or less.

4. The window glass for a vehicle according to claim 1 or 2, wherein, in a plan view of the first glass plate, in the functional member, when a rectangular region including the minimum area of the functional member is given, the length of at least one side of the rectangular region is 25 mm or more.

5. The vehicle window glass according to claim 1 or 2, wherein, in a plan view of the first glass plate, in the functional member region surrounded by the outer edge of the functional member, the filling portions are arranged in a matrix along the directions of two orthogonal sides.

6. The vehicle window glass according to claim 1 or 2, wherein, in a plan view of the first glass plate, the filling portions are arranged with an irregular outer edge shape in the region including the functional member.

7. The window glass for a vehicle according to claim 1 or 2, wherein, in a plan view of the first glass plate, the filling portions have a length of 1 mm or more.

8. The window glass for a vehicle according to claim 1 or 2, wherein, in a plan view of the first glass plate, in the functional member, the ratio of the area of the filling portion to the area of the region surrounded by the outer edge of the functional member is in the range of 4.5% to 45%.

9. The window glass for a vehicle according to claim 1 or 2, wherein, in a plan view of the first glass plate, the outer edge of the dielectric layer has a portion disposed more outside than the outer edge of the conductor layer.

10. The vehicle window glass according to claim 1 or 2, wherein, in a plan view of the first glass plate, the conductor layer constituting the linear portion includes a portion formed of a network of fine lines inside the linear portion.

11. The vehicle window glass according to claim 1 or 2, wherein, the functional member is an antenna capable of transmitting and receiving radio waves of a specified frequency.

12. The vehicle window glass according to claim 11, wherein, the antenna has a power supply electrode and a ground electrode on the conductor layer.

13. The vehicle window glass according to claim 12, wherein, between the first intermediate layer and the second glass plate, a transmission line connected to the power supply electrode and the ground electrode and led out from an end between the first glass plate and the second glass plate is disposed.

14. The vehicle window glass according to claim 12, wherein, on the main surface of the second glass plate on the side opposite to the first intermediate layer, a capacitively coupled power supply conductor portion disposed to face the power supply electrode and a capacitively coupled ground conductor portion disposed to face the ground electrode in a plan view of the first glass plate are disposed.

15. The vehicle window glass according to claim 1 or 2, wherein, a second intermediate layer is disposed between the functional member and the second glass plate.

16. The vehicle window glass according to claim 15, wherein, the second intermediate layer is made of the same material as the first intermediate layer.

17. The window glass for a vehicle according to claim 1 or 2, which is applicable to at least one of a windshield, a rear window glass, a side window glass, and a sunroof glass of a vehicle.

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