Laminated glass and vehicle window unit

Abstract

The present invention suppresses damage to a functional film. A laminated glass (10) is provided with a first glass plate (11) and a second glass plate (12), a functional film (15) positioned between the first glass plate (11) and the second glass plate (12), an intermediate film (13) surrounding the outer periphery of the functional film (15), and a shielding layer (14) partially overlapping the functional film (15) in a plan view. At least a portion of the outer periphery of the functional film (15) is visible without being covered by the shielding layer (14).

Description

Technical Field

[0001] This invention relates to laminated glass and vehicle window units. Background Technology

[0002] Laminated glass with a functional film is known. Patent Document 1 discloses a laminated window glass in which an interlayer structure having an SPD (Suspended Particle Device) film is disposed between two glass layers. In the interlayer structure, the outer periphery of the SPD film is surrounded by a frame-shaped first interlayer and sandwiched between a second and a third interlayer, thereby being sealed. The edge of the SPD film is covered by black ceramic ink coated on the surface of the glass layers and is therefore invisible.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent No. 5666128 Summary of the Invention

[0006] The technical problem that the invention aims to solve

[0007] Laminated glass with this functional film has the following requirements during product inspection, for example, to confirm whether bubbles are generated near the outer periphery of the functional film.

[0008] The present invention was made in view of the above-mentioned technical problems, and its object is to provide a laminated glass that can confirm whether bubbles are generated on the outer periphery of the functional film.

[0009] Technical solutions adopted to solve technical problems

[0010] The laminated glass disclosed herein comprises: a first glass plate and a second glass plate, a functional film located between the first glass plate and the second glass plate, an intermediate film surrounding the outer periphery of the functional film, and a shielding layer that partially overlaps with the functional film when viewed from above, wherein at least a portion of the outer periphery of the functional film is not covered by the shielding layer and is visible when viewed from above the second glass plate.

[0011] The window unit disclosed herein comprises: laminated glass as described in any one of claims 1 to 18, and

[0012] A frame disposed at the periphery of the laminated glass and capable of being installed on a vehicle. The portion of the outer periphery of the functional membrane that is not covered by the shielding layer but is visible is covered by the frame or the interior trim of the vehicle.

[0013] Invention Effects

[0014] According to the present invention, it is possible to confirm whether bubbles are generated on the outer periphery of the functional membrane. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the window unit according to the first embodiment.

[0016] Figure 2 This is a schematic cross-sectional view of laminated glass.

[0017] Figure 3 This is a schematic cross-sectional view showing an example of a functional membrane.

[0018] Figure 4 This is a schematic cross-sectional view of the functional membrane viewed from above.

[0019] Figure 5 This is a schematic diagram used to illustrate the location where the opening region is formed.

[0020] Figure 6 This is a diagram used to illustrate the area in laminated glass that is covered by interior decorative material.

[0021] Figure 7 This is a schematic diagram illustrating an example of the formation of an opening region.

[0022] Figure 8 This is an enlarged top view showing an example of an opening area.

[0023] Figure 9 This is a schematic diagram of the laminated glass 10 according to the second embodiment.

[0024] Figure 10 This is a top view showing the enlarged opening area of ​​the second embodiment.

[0025] Figure 11 This is a schematic diagram showing the annular opening region.

[0026] Figure 12 This is a schematic diagram showing the opening area formed by the holes.

[0027] Figure 13 This is a schematic diagram showing the opening area formed by the notch. Detailed Implementation

[0028] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The present invention is not limited to these embodiments, and may also include embodiments formed by combinations of these embodiments, where there are multiple embodiments. Furthermore, numerical values ​​include rounding ranges.

[0029] (First Implementation)

[0030] Figure 1 This is a schematic diagram of the window unit according to the first embodiment. Figure 1The window unit 1 shown in the first embodiment is a glass panel with a resin frame that is mounted on a vehicle. The window unit 1 is configured as a Module AssyWindow (MAW) (registered trademark), which includes: laminated glass 10, and a frame 20 disposed on the periphery of the laminated glass 10 and mounted on the vehicle. The window unit 1 can be mounted on the vehicle's window frame together with the frame 20, thus simplifying vehicle assembly.

[0031] (Window Unit)

[0032] The window unit 1 can be applied to sunroofs, rear windows, side windows, quarter windows, auxiliary windows, and windshields for vehicles. An auxiliary window is a piece of glass installed at the rear of the vehicle, lower than the rear window, to improve the driver's rear visibility. Here, "vehicle" typically refers to a motor vehicle, but it is considered to include moving objects with glass, such as trams, ships, and airplanes. However, the application of the laminated glass 10 is not limited to vehicles. Figure 1 The example shown is window unit 1, which constitutes the rear quarter window glass.

[0033] Figure 1 The illustration schematically shows the process of identifying window unit 1 from inside the carriage towards the outside. Figure 1 The laminated glass 10 of the window unit 1 is shown to be in a flat shape, but it is not limited to this and can also be in a curved shape that is bent in one or more directions.

[0034] also, Figure 1 In this context, the planar shape of the laminated glass 10 is approximately triangular, but the planar shape of the laminated glass 10 is not limited to a triangle. For example, it can also be a rectangle, trapezoid, or other quadrilaterals, or any other shape. Here, the planar shape refers to the shape of a specified area of ​​the laminated glass 10 when viewed from the normal direction of the inner side of the vehicle.

[0035] A frame 20 is formed at the periphery of the laminated glass 10. The frame 20 can be as follows: Figure 1 The frame 20 can be formed continuously in a ring around the entire outer periphery of the laminated glass 10, or it can be formed only on a portion of the outer periphery of the laminated glass 10 and discontinuous in the circumferential direction. Furthermore, the frame 20 only needs to contact either the end face or one of the two main surfaces (interior and / or exterior) of the laminated glass 10. For example, the frame 20 can be provided only on the interior surface of the laminated glass 10, or only on the end face. Furthermore, the frame 20 can be provided only on the interior and end faces of the laminated glass 10, or only on the exterior and end faces. Additionally, the frame 20 can be provided on the interior, exterior, and end faces of the laminated glass 10.

[0036] The frame 20 is, for example, made of resin. The resin used for the frame 20 is not particularly limited as long as it can form an integrally formed article with the laminated glass 10; preferably, it is a material usable in injection molding, i.e., a material that can be heated to melt and then cured by cooling. The resin used for the frame 20 can be a thermoplastic resin. The resin used for the frame 20 includes, for example, at least one of thermoplastic elastomer (TPE), polyvinyl chloride (PVC), ethylene propylene diene monomer (EPDM), and thermoplastic vulcanizate (TPV). Thermoplastic elastomer (TPE) materials include olefin-based thermoplastic elastomers (TPO).

[0037] Decorative components may be provided on the frame 20. These decorative components are primarily exterior (or interior) decorative components used for window decoration. Furthermore, a control unit may be provided on the frame 20 for electrically controlling the functional membrane 15, which will be described later. The control unit may be adhered to the surface of the frame 20 or at least partially embedded in the surface of the frame 20.

[0038] (Laminated glass)

[0039] Figure 2 This is a schematic cross-sectional view of laminated glass. (For example...) Figure 2 As shown, the laminated glass 10 includes: a first glass panel 11, a second glass panel 12, an interlayer film 13, a shielding layer 14, and a functional film 15. The direction from the inside of the vehicle to the outside is denoted as direction Z. The laminated glass 10 is constructed by sequentially stacking the shielding layer 14 (14A), the second glass panel 12, the interlayer film 13 and the functional film 15, the shielding layer 14 (14B), and the first glass panel 11 along direction Z. That is, when installed on a vehicle, the first glass panel faces outwards, and the second glass panel faces inwards. Direction Z can also be referred to as the stacking direction. Hereinafter, when referring to the "top view of the second glass panel 12," it means observing the laminated glass 10 from the direction of the second glass panel 12 towards the first glass panel 11, that is, observing the laminated glass 10 in direction Z. When referring to "the top view of the first glass plate 11", it means observing the laminated glass 10 from the direction of the first glass plate 11 toward the second glass plate 12, that is, observing the laminated glass 10 in the direction opposite to direction Z.

[0040] The total thickness T0 of the laminated glass 10 is preferably between 2.8 mm and 10 mm. If the total thickness T0 of the laminated glass 10 is 2.8 mm or more, sufficient rigidity can be ensured. Furthermore, if the total thickness of the laminated glass 10 is less than 10 mm, sufficient transmittance is ensured without excessive weight. Additionally, the total thickness mentioned here, as well as the thickness described below, refers to the length in the Z-direction.

[0041] (glass plate)

[0042] The first glass plate 11 and the second glass plate 12 are glass plates with their main surfaces facing each other. The intermediate film 13 and the functional film 15 are located between the first glass plate 11 and the second glass plate 12. The first glass plate 11 and the second glass plate 12 are fixed in a state that clamps the intermediate film 13 and the functional film 15.

[0043] The first glass panel 11 constitutes one surface of the laminated glass 10. That is, the first glass panel 11 is the outer side glass panel facing outwards when the laminated glass 10 is installed in a vehicle. The second glass panel 12 constitutes the other surface of the laminated glass 10. That is, the second glass panel 12 is the inner side glass panel facing inwards when the laminated glass 10 is installed in a vehicle. The first glass panel 11 and the second glass panel 12 can be flat or curved in one or more directions.

[0044] Hereinafter, the Z-direction surface of the first glass panel 11 will be referred to as the first surface, and the surface opposite to the first surface will be referred to as the second surface. The Z-direction surface of the second glass panel 12 will be referred to as the third surface, and the surface opposite to the third surface will be referred to as the fourth surface. The first surface faces the outer side of the vehicle, and the fourth surface faces the inner side of the vehicle.

[0045] The first glass plate 11 and the second glass plate 12 can be either inorganic glass or organic glass. As inorganic glass, examples include soda-lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, quartz glass, etc., without particular limitation. From the viewpoint of scratch resistance, the first glass plate 11 is preferably inorganic glass; from the viewpoint of formability, soda-lime glass is preferred. When the first glass plate 11 and the second glass plate 12 are soda-lime glass, transparent glass, green glass containing a specified amount or more of iron, UV-blocking green glass, privacy glass, etc., can be used.

[0046] Inorganic glass can be either unstrengthened glass or strengthened glass. Unstrengthened glass is made by forming molten glass into a sheet and then annealing it. Strengthened glass is made by forming a compressive stress layer on the surface of unstrengthened glass.

[0047] Tempered glass can be either physically strengthened glass, such as air-cooled strengthened glass, or chemically strengthened glass. In the case of physically strengthened glass, the glass surface can be strengthened by operations other than annealing, such as rapidly cooling a uniformly heated glass sheet from a temperature near its softening point during bending and forming, utilizing the temperature difference between the glass surface and the interior of the glass to generate a compressive stress layer on the glass surface.

[0048] In the case of chemically strengthened glass, the glass surface can be strengthened by inducing compressive stress on the glass surface, for example, after bending and forming, using methods such as ion exchange. Furthermore, glass that absorbs ultraviolet or infrared radiation can be used, and transparent glass is even more preferred, but glass sheets colored to a degree that does not impair transparency can also be used.

[0049] Materials used for acrylic glass include polycarbonate, acrylic resins such as polymethyl methacrylate, polyvinyl chloride, and transparent resins such as polystyrene.

[0050] The shapes of the first glass plate 11 and the second glass plate 12 can be various shapes, including those with processed curvature. There are no particular limitations on the forming method of the first glass plate 11 and the second glass plate 12; for example, in the case of inorganic glass, glass plates formed by float glass or similar methods are preferred. When the first glass plate 11 and the second glass plate 12 are curved inorganic glass, they can be bent after float glass forming and before being bonded by an intermediate film 13. Bending is performed by heating to soften the glass. The heating temperature of the glass during bending is approximately 550°C to 700°C. Bending to form the first glass plate 11 and the second glass plate 12 into a specified curved shape can be achieved by gravity forming, pressure forming, rolling forming, etc.

[0051] The thickness T1 of the first glass plate 11 is not particularly limited, and is generally in the range of 0.1 mm to 10 mm. It can be appropriately selected according to the type of vehicle or part to which the laminated glass 10 is applied. If the thickness T1 of the first glass plate 11 is 0.3 mm or more, it is sufficient to maintain its strength such as impact resistance and flystone resistance. More preferably, it is 0.5 mm or more, further preferably 0.7 mm or more, particularly preferably 1.1 mm or more, and most preferably 1.6 mm or more.

[0052] Furthermore, when the thickness T1 of the first glass plate 11 is less than 4 mm, the mass of the laminated glass 10 will not be excessive, which is preferable from the viewpoint of vehicle fuel consumption. More preferably, the thickness T1 of the first glass plate 11 is less than 3.5 mm, even more preferably less than 2.6 mm, even more preferably less than 2.2 mm, and particularly preferably less than 2.1 mm. Additionally, the thickness T1 in this document is preferably the thickness of the thinnest part of the first glass plate 11.

[0053] The first glass panel 11 preferably has sufficient impact resistance for a vehicle. Furthermore, this impact resistance can be evaluated using, for example, the impact resistance test according to UN R43. The impact resistance test is a test to investigate whether safety glass, such as laminated glass for motor vehicles, has the necessary adhesion or strength against the impact of small, hard projectiles. Specifically, the test is conducted by holding the laminated glass (safety glass) at a specified temperature, placing it on a support frame with the vehicle-side outwards of the first glass panel 11 facing upwards, and allowing a steel ball to be dropped naturally from a specified height.

[0054] Regarding the thickness T2 of the second glass plate 12, it can be the same as the thickness T1 of the first glass plate 11. Alternatively, the first glass plate 11 can have a different composition than the second glass plate 12, and / or can have a different thickness. For example, the second glass plate 12 can be thinner than the first glass plate 11.

[0055] When the thickness T2 of the second glass plate 12 is less than 1.1 mm, from the point of view of strength, the second glass plate 12 is preferably chemically strengthened glass.

[0056] At least one of the first surface of the first glass plate 11 and the fourth surface of the second glass plate 12 may be provided with a coating that has water-repellent, ultraviolet or infrared blocking functions, or a coating that has low reflectivity, low radiation, anti-fouling properties, or anti-condensation properties. Furthermore, at least one of the second surface of the first glass plate 11 and the third surface of the second glass plate 12 may be provided with a coating that has ultraviolet or infrared blocking, low radiation properties, absorbs visible light, or is colored. Additionally, a low-emissivity coating may be formed on the fourth surface of the second glass plate 12.

[0057] That is, at least one of the first glass plate 11 and the second glass plate 12 may have any one or more of the following: a water-repellent layer, an ultraviolet shielding layer, an infrared reflective layer, a low reflectivity layer, a low emissivity layer, an anti-condensation layer, a visible light absorbing layer, and a coloring layer.

[0058] (Intermediate membrane)

[0059] An intermediate membrane 13 is disposed between the first glass plate 11 and the second glass plate 12. The intermediate membrane 13 preferably surrounds the outer periphery 15A of the functional membrane 15. Figure 2In this example, the interlayer 13 has an interlayer 13A bonded to the first glass plate 11, an interlayer 13B bonded to the second glass plate 12, and a frame-shaped interlayer 13C located between the interlayers 13A and 13B, surrounding the outer periphery 15A of the functional film 15. In this example, the interlayer 13C surrounds the outer periphery 15A of the functional film 15, but the interlayer 13C may not be provided. Even without the interlayer 13C, as long as the periphery of the functional film 15 is located further inward than the periphery of the first glass plate 11 or the second glass plate 12, the outer periphery 15A of the functional film 15 can be surrounded by the deformation of at least one of the interlayers 13A and 13B during the pressing process in the manufacturing process of the laminated glass 10. When the thickness of the functional film 15 is large, the thickness difference between the portion with the functional film 15 and the portion further outward than the functional film 15 increases, therefore, it is preferable to provide the interlayer 13C to fill the thickness difference.

[0060] In addition, in the first embodiment, the interlayer films 13A, 13B, and 13C are each independently bonded during the manufacturing of the laminated glass 10, but this is not a limitation. For example, the interlayer film 13 can also be integral, such as when a highly fluid material is injected between the first glass plate 11 and the second glass plate 12 to form the interlayer film 13.

[0061] As the interlayer 13, thermoplastic resins are commonly used, such as plasticized polyvinyl acetal resins, plasticized polyvinyl chloride resins, saturated polyester resins, plasticized saturated polyester resins, polyurethane resins, plasticized polyurethane resins, ethylene-vinyl acetate copolymer resins, ethylene-ethyl acrylate copolymer resins, cycloolefin polymer resins, ionomer resins, and other thermoplastic resins conventionally used for this purpose. Alternatively, the resin composition containing modified block copolymer hydrogenates described in Japanese Patent No. 6065221 may also be suitably used.

[0062] As the material for the interlayer 13, plasticized polyvinyl alcohol acetal resins are suitable from the perspective of achieving an excellent balance of various properties such as transparency, weather resistance, strength, adhesion, penetration resistance, impact energy absorption, moisture resistance, thermal insulation, and sound insulation. These thermoplastic resins can be used alone or in combination of two or more. The term "plasticized" in the context of plasticized polyvinyl alcohol acetal resins means that plasticization can be achieved by adding plasticizers. The same meaning applies to other plasticized resins.

[0063] However, when a functional membrane 15 is encapsulated within the intermediate membrane 13, depending on the type of encapsulated material, it may deteriorate due to a specific plasticizer. In such cases, it is preferable to use a resin that is substantially free of the plasticizer. That is, it is sometimes preferable that the intermediate membrane 13 is free of plasticizer. Examples of plasticizer-free resins include ethylene-vinyl acetate copolymer resins.

[0064] Examples of polyvinyl alcohol acetal resins include polyvinyl alcohol formaldehyde resins obtained by reacting polyvinyl alcohol (hereinafter also referred to as "PVA") with formaldehyde, polyvinyl alcohol acetal resins (in the narrow sense) obtained by reacting PVA with acetaldehyde, and polyvinyl alcohol butyral resins (hereinafter also referred to as "PVB") obtained by reacting PVA with n-butyraldehyde. Among these, PVB is particularly suitable from the perspective of a superior balance of various properties, including transparency, weather resistance, strength, adhesion, penetration resistance, impact energy absorption, moisture resistance, thermal insulation, and sound insulation. Furthermore, these polyvinyl alcohol acetal resins can be used alone or in combination of two or more.

[0065] As the interlayer 13, a curable transparent resin, also known as optically transparent resin (OCR), or a transparent adhesive sheet, also known as optically transparent adhesive (OCA), can be used. Using a curable transparent resin or a transparent adhesive sheet allows for the fabrication of a laminate at room temperature, making it ideal. As the curable transparent resin or transparent adhesive sheet, resins such as acrylics, silicones, polyurethane acrylates, and epoxy resins can be used. Furthermore, these curable transparent resins or transparent adhesive sheets can be used alone or in combination of two or more.

[0066] The material forming the interlayer 13 is not limited to thermoplastic resin. The interlayer 13 may also contain functional particles such as infrared absorbers, ultraviolet absorbers, and luminescent agents. In addition, the interlayer 13 may also have a colored portion known as a light-shielding strip.

[0067] The thickness of the interlayer film 13 is preferably at least 0.3 mm at its thinnest point. If the thickness of the thinnest point of the interlayer film 13 is at least 0.3 mm, the impact resistance required for the laminated glass 10 is sufficient. The thickness of the interlayer film 13 is preferably at least 3 mm at its thickest point. If the maximum thickness of the interlayer film 13 is at least 3 mm, the mass of the laminated glass 10 will not be excessive. The maximum thickness of the interlayer film 13 is more preferably at least 2.8 mm, and even more preferably at least 2.6 mm.

[0068] Furthermore, the thickness of the intermediate film 13 refers to the thickness of the intermediate film 13 alone, excluding the thickness of the functional film 15. Therefore, the thickness of the intermediate film 13 is the length obtained by subtracting the thickness T4 of the functional film 15 from the thickness T3 from the interface T3 between the intermediate film 13A and the first glass plate 11 (second side) to the interface T3 between the intermediate film 13B and the second glass plate 12 (third side).

[0069] Furthermore, the thickest part of the intermediate membrane 13 refers to, for example, the portion where the functional membrane 15 is not sandwiched (the portion that does not overlap with the functional membrane 15 when viewed from above). Therefore, the thickness of the thickest part of the intermediate membrane 13 can also be described as thickness T3 since the functional membrane 15 is not present. On the other hand, the thinnest part of the intermediate membrane 13 refers to, for example, the portion where the functional membrane 15 is sandwiched (the portion that overlaps with the functional membrane 15 when viewed from above). Therefore, the thickness of the thinnest part of the intermediate membrane 13 can also be described as thickness T3 minus the thickness T4 of the functional membrane 15 (see reference). Figure 3 The value obtained after that.

[0070] Furthermore, ideally, all intermediate membranes 13A, 13B, and 13C contained in intermediate membrane 13 are formed of the same material, but some or all of intermediate membranes 13A, 13B, and 13C may also be formed of different materials. For example, intermediate membranes 13A and 13B may be formed of the same material while 13C may be formed of a different material.

[0071] When manufacturing the interlayer film 13, for example, the aforementioned resin material for forming the interlayer film is appropriately selected, and extrusion molding is performed using an extruder in a heated molten state. The extrusion conditions, such as the extrusion speed of the extruder, are set to conditions that ensure uniformity. Then, the resin film obtained by extrusion molding is matched to the design of the laminated glass 10, for example, by stretching it to have curvature as needed, thereby completing the interlayer film 13.

[0072] (Shielding layer)

[0073] The shielding layer 14 is an opaque layer. The shielding layer 14 is, for example, an opaque (e.g., black) colored ceramic layer. The shielding layer 14 can be a colored interlayer film, a colored film, or a combination of a colored interlayer film and a colored ceramic layer with light-shielding properties. The colored film can be integrated with an infrared reflective film, etc. Here, "opaque" means that the visible light transmittance is at least 5% or less, preferably 3% or less, more preferably 1% or less, and also includes substantially 0%. The shielding layer 14 inhibits the degradation of resins such as polyurethane that hold the laminated glass 10 to the vehicle body due to ultraviolet radiation.

[0074] The masking layer 14 can be formed, for example, by applying a ceramic color paste containing molten glass frit with black pigment to a glass plate using screen printing and firing, but is not limited to this method. The masking layer 14 can also be formed, for example, by applying an organic ink containing black or dark pigment to a glass plate using screen printing and drying.

[0075] Figure 2 In this example, the shielding layer 14 includes an inner surface shielding layer 14A and an outer surface shielding layer 14B. The inner surface shielding layer 14A is disposed along the direction from the functional film 15 toward the second glass plate 12. That is, the inner surface shielding layer 14A may be disposed on the main surface of the second glass plate 12, or it may be disposed between the functional film 15 and the second glass plate 12. Figure 2 In this example, the inner surface shielding layer 14A is disposed on the main surface of the second glass plate 12, and more specifically, on the main surface (fourth surface) of the second glass plate 12 located in the opposite direction to the functional film 15.

[0076] The outer surface shielding layer 14B is disposed along the direction (Z direction) from the functional film 15 toward the first glass plate 11. That is, the outer surface shielding layer 14B can be disposed on the main surface of the first glass plate 11, or it can be disposed between the functional film 15 and the first glass plate 11. Figure 2 In this example, the outer surface shielding layer 14B is disposed on the main surface of the first glass plate 11, and more specifically, on the main surface (second surface) of the first glass plate 11 facing the functional film 15. In other words, the outer surface shielding layer 14B is disposed at the interface between the first glass plate 11 and the intermediate film 13A.

[0077] The aforementioned shielding layers 14 are not limited to Figure 2 The example shown can also be disposed on the surface of the intermediate films 13A and 13B, or embedded inside the intermediate films 13A and 13B. The shielding layer does not need to have both an inner surface shielding layer and an outer surface shielding layer. That is, the shielding layer can have an inner surface shielding layer but no outer surface shielding layer, or it can have an outer surface shielding layer but no inner surface shielding layer.

[0078] For example, the shielding layer 14 may be configured as a strip along the periphery of the laminated glass 10. The shielding layer 14 partially overlaps with the functional film 15 when viewed from above. Preferably, the shielding layer 14 that partially overlaps with the functional film 15 when viewed from above overlaps with the periphery of the functional film 15. The shielding layer 14 is preferably configured as a strip along the entire periphery of the laminated glass 10.

[0079] Figure 1 In this example, the inner surface shielding layer 14A and the outer surface shielding layer 14B are formed in a strip shape along the outer periphery 15A of the functional film 15 when viewed from above by the second glass plate 12. When viewed from above by the second glass plate 12, the inner periphery of the inner surface shielding layer 14A and the outer surface shielding layer 14B is positioned closer to the center of the laminated glass 10 than the outer periphery 15A of the functional film 15, while the outer periphery of the inner surface shielding layer 14A and the outer surface shielding layer 14B is positioned further outward than the outer periphery 15A of the functional film 15. Therefore, when viewed from above by the second glass plate 12, the inner surface shielding layer 14A covers the entire outer periphery 15A of the functional film 15, except for the opening area 40 described later. Furthermore, Figure 1 The diagram shows an inner surface shielding layer 14A, and an outer surface shielding layer 14B with the same planar shape as the inner surface shielding layer 14A. However, for example, the inner periphery of the outer surface shielding layer 14B may be positioned closer to the center than the inner periphery of the inner surface shielding layer 14A.

[0080] The outer periphery 15A of the functional film 15 is more susceptible to the influence of the external environment and the intermediate film 13C (e.g., moisture), and deteriorates more easily than the area closer to the center. By covering the outer periphery 15A of the functional film 15 with an opaque shielding layer 14, the degradation of the functional film 15 near the outer periphery 15A caused by ultraviolet light is less likely to occur. Furthermore, even if the functional film 15 deteriorates, the deteriorated portion remains invisible. When the functional film 15 is a dimming film, the degradation suppression near the outer periphery 15A of the functional film 15 is particularly significant. In addition, by providing an inner surface shielding layer 14A and an outer surface shielding layer 14B, the electrodes and electrode extension wiring electrically connected to the functional film 15 can be hidden, making them difficult to see from both outside and inside the vehicle.

[0081] (Functional membrane)

[0082] The functional film 15 is a component that imparts additional functions to the laminated glass 10. Functional films include, for example, any of the following: a dimming film, an electrothermal film, a light-emitting display film, and a solar cell film. A dimming film is a film capable of adjusting the transmittance of visible light in response to input. An electrothermal film is a film that generates heat by applying electricity. A light-emitting display film is a film composed of pixels arranged by light-emitting elements, capable of displaying images by applying electricity to each pixel. Light-emitting elements include organic or non-electroluminescent (EL) elements. A solar cell film is a film that converts light energy into electrical energy into a solar cell.

[0083] Figure 3 This is a schematic cross-sectional view showing an example of a functional membrane. Figure 3 In this example, the functional film 15 is a dimming film. The dimming film allows for switching the light transmittance of the laminated glass 10.

[0084] like Figure 3 As shown, the functional film 15, which serves as a dimming film, includes a transparent substrate 16A, a transparent conductive film 17A, a dimming layer 18, a transparent conductive film 17B, and a transparent substrate 16B. The functional film 15 is composed of the transparent substrate 16B, the transparent conductive film 17B, the dimming layer 18, the transparent conductive film 17A, and the transparent substrate 16A stacked sequentially along the Z direction.

[0085] Hereinafter, without distinguishing between transparent substrate 16A and transparent substrate 16B, they will be referred to as substrate 16, and without distinguishing between transparent conductive film 17A and transparent conductive film 17B, they will be referred to as conductive film 17. Additionally, functional film 15 is connected to electrodes. Electrodes include electrode 30A connected to transparent conductive film 17A and electrode 30B connected to transparent conductive film 17B. Wiring 31A and 31B for connecting the electrodes to control unit 32 are connected to electrodes 30A and 30B connected to functional film 15. Without distinguishing between electrodes 30A and 30B, they will be referred to as electrode 30, and without distinguishing between wiring 31A and wiring 31B, they will be referred to as wiring 31.

[0086] The thickness T4 of the functional film 15 is, for example, 0.05 mm to 1.2 mm. When the thickness T4 of the functional film 15 is large, bubbles are easily generated at the outer periphery of the functional film 15. Therefore, it is particularly useful to have a structure that can confirm whether there are bubbles at the outer periphery of the functional film 15. The effect of the present invention is significant when the thickness T4 of the functional film 15 is 0.1 mm or more, and even more significant when it is 0.2 mm or more. When the thickness of the functional film 15 is too large, the glass sheet is prone to cracking during the formation of laminated glass and during the formation of the frame at the periphery of the laminated glass. Therefore, the thickness T4 is preferably 1.0 mm or less, more preferably 0.8 mm or less.

[0087] (Transparent substrate)

[0088] Transparent substrates 16A and 16B are a pair of substrates that support transparent conductive films 17A and 17B and sandwich the dimming layer 18. Transparent substrate 16A is located further in the Z direction than the dimming layer 18, and transparent substrate 16B is located further in the opposite direction to the Z direction than the dimming layer 18.

[0089] The substrate 16 is preferably a transparent resin layer. The substrate 16 preferably contains, for example, one or more of the following: polyethylene terephthalate, polyethylene naphthalate, polyamide, polyether, polysulfone, polyethersulfone, polycarbonate, polystyrene, cyclic polyolefin, polyarylate, polyetherimide, polyetheretherketone, polyimide, aromatic polyamide, polybutylene terephthalate, cellulose triacetate, polyurethane, and cyclic olefin polymers.

[0090] In addition, transparent substrate 16A and transparent substrate 16B may be made of the same material as those described above, but are not limited thereto, and may also be made of other materials.

[0091] The thickness T5 of the substrate 16 is, for example, 5 μm to 500 μm, preferably 10 μm to 200 μm, and more preferably 50 μm to 150 μm. A thickness T5 of 5 μm or more advantageously suppresses the decrease in impact resistance of the laminated glass 10, while a thickness of 500 μm or less prevents excessive mass of the laminated glass 10. Furthermore, substrates 16A and 16B may have the same thickness T5, but their thicknesses can differ.

[0092] (Conductive film)

[0093] A transparent conductive film 17A is formed on the surface of the transparent substrate 16A facing the direction opposite to the Z direction, and is in contact with the Z-direction surface of the dimming layer 18. A transparent conductive film 17B is formed on the Z-direction surface of the transparent substrate 16B, and is in contact with the Z-direction surface of the dimming layer 18. Transparent conductive films 17A and 17B are a pair of conductive films that hold the dimming layer 18 in place. Transparent conductive films 17A and 17B are connected to the control unit 32 (see reference 32) via wiring 31. Figure 3 The connection is made by applying voltage to the control unit 32. The transparent conductive film 17A and the transparent conductive film 17B can be formed on the entire surface of the transparent substrate 16A and the transparent substrate 16B, respectively.

[0094] As the conductive film 17, for example, a transparent conductive oxide (TCO) can be used. Examples of TCOs include tin-doped indium oxide (ITO), aluminum-doped zinc oxide (AZO), and indium-doped cadmium oxide, but it is not limited to these.

[0095] Transparent conductive polymers such as poly(3,4-ethylenedioxythiophene) (PEDOT) or poly(4,4-dioctylcyclopentadithiophene) can be advantageously used as the conductive film 17. Furthermore, laminated films of metal and dielectric layers, silver nanowires, or silver or copper meshes can also be advantageously used as the conductive film 17.

[0096] The conductive film 17 can be formed, for example, by physical vapor deposition (PVD) methods such as sputtering, vacuum evaporation, and ion plating. The conductive film 17 can also be formed by chemical vapor deposition or wet coating.

[0097] (Dimming layer)

[0098] like Figure 3As shown, the dimming layer 18 is a layer capable of changing the amount of light transmitted. The dimming layer 18 is disposed between the transparent conductive film 17A and the transparent conductive film 17B. The dimming layer 18 may also include a sealing material (not shown) that seals the sides of the dimming layer 18. As the dimming layer 18, for example, one or more selected from a suspended particle device (SPD), guest-host liquid crystal (GHLC), electrochromic (EC), polymer dispersed liquid crystal (PDLC), and polymer network liquid crystal (PNLC) can be selected. For example, if the dimming layer 18 does not contain liquid crystal and therefore does not require a sealing material, a sealing material may not be provided. In this case, the outer peripheral end of the dimming layer 18 becomes the end of the dimming layer 18.

[0099] As a suspended particle device, a conventional SPD film can be used, which is formed by sandwiching a polymer layer containing suspended particles that can be oriented by applying a voltage between two substrates 16 coated with a conductive film 17 along the Y direction. This SPD film achieves high visible light transmittance and high transparency by applying a voltage between its two sides to orient the suspended particles in the polymer layer. In the state where no voltage is applied, the suspended particles in the polymer layer are not oriented, resulting in low visible light transmittance and low transparency.

[0100] As the SPD membrane, commercially available products such as LCF-1103DHA (trade name, manufactured by Hitachi Chemical Co., Ltd.) can be used. Furthermore, since these commercially available products are supplied in specified sizes, they can be cut to the desired size before use. Regarding the thickness of the SPD membrane, there is no particular limitation, but from the viewpoint of operability and ease of acquisition, a thickness of 0.1 mm to 0.4 mm is preferred.

[0101] (electrode)

[0102] Electrode 30 is connected to conductive film 17, transmitting signals from external device (control unit 32, see reference 17). Figure 3 A voltage is applied to the conductive film 17. Figure 1In this example, each electrode 30 is located at the lower part of the laminated glass 10, but the position of the electrodes 30 is not limited to this and can be arbitrary, for example, it can be located concentrated at the upper part when viewed from above. Electrode 30A is one of the positive and negative electrodes and is connected to the control unit 32 via wiring 31A. In addition, electrode 30B is the other of the positive and negative electrodes and is connected to the control unit 32 via wiring 31B. The control unit 32 supplies voltage to the dimming layer 18 through electrodes 30A and 30B, and switches the light transmittance of the dimming layer 18 according to the voltage.

[0103] The materials for electrodes 30A and 30B can be any conductive material; there are no particular limitations. Examples of suitable metallic materials include: gold, silver, copper, aluminum, tungsten, platinum, palladium, nickel, cobalt, titanium, iridium, zinc, magnesium, and tin. Furthermore, these metals can be plated or formed into alloys or composites with resin.

[0104] From a cost and availability perspective, electrode 30 can suitably be made of copper strip or plain braided copper wire, or FPC (flexible printed circuit). The copper strip or plain braided copper wire can be plated with a metal other than copper. Electrode 30 can be integrally formed with wiring 31.

[0105] Electrode 30 can be bonded to the corresponding conductive film 17 via any of the following: a conductive adhesive material (conductive adhesive layer), an anisotropic conductive film, or solder. Alternatively, electrode 30 can directly contact the conductive film 17 without the need for a conductive adhesive material, anisotropic conductive film, or solder. Or, electrode 30 can be formed using printing methods such as screen printing, inkjet printing, offset printing, flexographic printing, or gravure printing.

[0106] Electrode 30 has sufficient length and shape to energize dimming layer 18. The shape of electrode 30 is not particularly limited, but is usually roughly rectangular.

[0107] In a top view, electrode 30 is preferably positioned at least 5 mm inside the periphery (end) of the first glass plate 11 and the second glass plate 12, and more preferably at least 8 mm inside. This configuration reduces the risk of corrosion of electrode 30 or short circuits between different potentials caused by moisture seeping in from the periphery of the first glass plate 11 and the second glass plate 12.

[0108] The length of electrode 30 is not particularly limited, but it is preferred to be 5 mm or more to ensure sufficient power supply and improve operability.

[0109] The thickness of electrode 30 is preferably 0.05 mm to 0.4 mm. By making the thickness of electrode 30 greater than 0.05 mm, sufficient strength can be obtained, thus suppressing the occurrence of faults such as open circuits. Furthermore, by making the thickness of electrode 30 less than 0.4 mm, the thickness deviation between electrode 30 and other parts is reduced. This suppresses the stress generated on the first glass plate 11 and the second glass plate 12, reducing the risk of breakage of the first glass plate 11 and the second glass plate 12.

[0110] Electrode 30 is formed on a portion of the outer periphery of functional membrane 15. Wiring 31 is connected to electrode 30 at one end and to control unit 32 at the other end.

[0111] like Figure 3 As shown schematically, wiring 31A and 31B are assembled into a single component via an FPC or the like, and are led out from electrodes 30A and 30B disposed on the outer periphery 15A of the functional film 15 to the side end face of the laminated glass 10. Figure 2 In this example, the exposed wirings 31A and 31B are bent along the side end face of the laminated glass 10 and led out to the main surface (fourth surface) of the second glass plate 12. Wirings 31A and 31B are connected to terminal portions 33 provided on the shielding layer 14 (inner surface shielding layer 14A). Terminal portions 33 are connected to the wiring harness connected to the vehicle's control unit 32, thereby connecting the wirings 31A and 31B of the functional film 15 to the control unit 32. In the terminal portions 33, the connection portion between the wirings 31A and 31B and the wiring harness is covered with resin material.

[0112] (The shape of the functional membrane)

[0113] like Figure 2 As shown, the functional film 15 is formed to be smaller than the planar shape of the laminated glass 10 (first glass plate 11, second glass plate 12) corresponding to the intermediate film 13C. The outer periphery 15A of the functional film 15 has a position that is offset more towards the center than the outer periphery of the laminated glass 10 (first glass plate 11, second glass plate 12).

[0114] Figure 4 This is a schematic cross-sectional view of the functional membrane 15 viewed from above. (Example) Figure 4As shown, the functional film 15 is surrounded by an intermediate film 13 (intermediate film 13C). Considering dimensional tolerances, a small gap is intentionally provided between the outer periphery 15A of the functional film 15 and the inner periphery of the intermediate film 13. However, this small gap is filled during the lamination process of the laminated glass 10 due to the compression deformation of the intermediate film 13 in the thickness direction, thus ensuring a tight seal between the outer periphery 15A of the functional film 15 and the inner periphery of the intermediate film 13. However, due to uneven degassing during the manufacturing process and unwanted air intrusion from the outside, tiny air bubbles may remain between the outer periphery 15A of the functional film 15 and the inner periphery of the intermediate film 13.

[0115] Therefore, in the inspection process after the manufacture of laminated glass 10, there is a need to confirm whether there are any residual air bubbles at the designated locations on the outer periphery 15A of the functional film 15.

[0116] Therefore, in the first embodiment, from a top-view perspective of the second glass plate 12, at least a portion of the outer periphery 15A of the functional film 15 is not covered by the shielding layer 14 and can be seen. Specifically, the inner surface shielding layer 14A is provided with a structure for making the outer periphery 15A of the functional film 15 visible. Figure 1 , Figure 2 As shown, from a top view of the second glass plate 12, the inner surface shielding layer 14A has an opening region 40 at a location where it overlaps with a portion of the outer periphery 15A of the functional membrane 15. Figure 1 , Figure 2 In this process, the opening region 40 is a hole (opening) partially formed between the inner and outer peripheries of the inner surface shielding layer 14A. The opening region 40 may also be formed on the outer surface shielding layer 14B instead of the inner surface shielding layer 14A, or it may be formed on both the inner surface shielding layer 14A and the outer surface shielding layer 14B.

[0117] The opening region 40 is a region through which visible light can pass. The opening region 40 may be a space formed by removing a portion of the inner surface shielding layer 14A, or a light-transmitting component may be disposed in this space. In this way, from the top view of the second glass plate 12, a predetermined portion of the outer periphery 15A of the functional film 15 that overlaps with the opening region 40 is not covered by the shielding layer 14 (inner surface shielding layer 14A) and can be seen through the opening region 40.

[0118] (Location where the opening region is formed)

[0119] Next, the location of the opening region 40 will be explained. The opening region 40 may be formed to overlap with the entire outer periphery 15A of the functional membrane 15, but it is preferable to form it to partially overlap with a defined area of ​​the outer periphery 15A of the functional membrane 15.

[0120] Figure 5 This is a schematic diagram illustrating the location where the opening region 40 is formed. Figure 5 A portion of the outer periphery 15A of the functional membrane 15 and a portion of the outer periphery of the glass plates (first glass plate 11, second glass plate 12) are shown magnified from a top view of the second glass plate 12. For ease of explanation, the curved shape of the outer periphery of the glass plates is emphasized (curvature magnified).

[0121] In the outer periphery 15A of the functional film 15, the designated portion overlapping the opening region 40 preferably includes, in plan view, a position where the minimum distance D from the outer periphery of the first glass plate 11 or the second glass plate 12 is 12 mm or more, and more preferably 13 mm or more. Here, for a certain focal point of the outer periphery 15A of the functional film 15, the minimum distance D refers to the smallest distance among the distances between the focal point and all points on the outer periphery of the glass plates (first glass plate 11, second glass plate 12). That is, a minimum distance D is defined for each focal point. In addition, when the outer periphery shapes of the first glass plate 11 and the second glass plate 12 are different, the minimum distance D can be taken as the smaller value among the values ​​obtained based on the outer periphery of the first glass plate 11 and the outer periphery of the second glass plate 12.

[0122] Figure 5 In the middle, the minimum distance D at position P1 on the outer perimeter 15A is denoted as D1, the minimum distance D at position P2 is denoted as D2, and the minimum distance D at position P3 is denoted as D3. Position P3 is the position between position P1 and position P2. Figure 5 In the test, at position P3 on the outer perimeter 15A, the minimum distance D (D3) is 13 mm or more. At this time, an opening area 40 (single-dot dashed section) is formed, for example, from position P1 to position P2, including position P3. Furthermore, D1 and D2 can each be 13 mm or more, or at least one can be less than 13 mm. This is because UN R43 requires that no bubbles be present in areas more than 15 mm from the glass outline after a specified test, and the US Federal Motor Vehicle Safety Standard (FMVSS) specifies 13 mm. Therefore, even if a shielding layer 14 is pre-installed before the inspection process, the presence of bubbles at the required locations can be confirmed.

[0123] The areas where the minimum distance D increases are mostly those where the shapes of the glass plate and the functional membrane 15 differ.

[0124] Figure 5In the glass plate (at least one of the first glass plate 11 and the second glass plate 12), when viewed from above, the outer periphery of the glass plate includes an outwardly convex curved portion CV. In contrast, the functional film 15, when viewed from above, has a straight portion SL in its outer periphery that faces the curved portion CV. When the convex curved portion CV faces the straight portion SL when viewed from above, the distance between the convex curved portion CV and the outer periphery 15A of the functional film 15 increases near the apex of the curved portion CV. That is, the minimum distance D is highly likely to exceed 13 mm.

[0125] Therefore, the designated portion of the outer periphery 15A of the functional film 15 that overlaps with the opening region 40 can be a straight section SL. Thus, from a top view of the second glass plate 12, at least a portion of the straight section SL in the outer periphery 15A of the functional film 15 is not covered by the shielding layer 14 and can be seen. The straight section SL, depending on the design of the laminated glass 10, can be formed at any location on the outer periphery 15A of the functional film 15.

[0126] Furthermore, the portion of the outer periphery 15A of the functional film 15 that overlaps with the opening region 40 may be the forming portion of the electrode 30. That is, from the top view of the second glass plate 12, at least the forming portion of the electrode 30 in the outer periphery 15A of the functional film 15 is not covered by the shielding layer 14 and can be seen. Sometimes, the forming portion of the electrode 30 in the outer periphery 15A of the functional film 15 is formed in a straight line for connection with the FPC or the like. Therefore, the forming portion of the electrode 30 is sometimes also the forming portion of the straight line SL. Alternatively, the forming portion of the electrode 30 may be other than the straight line SL.

[0127] In addition, in the first embodiment, the portion of the outer periphery 15A of the functional film 15 that is not covered by the shielding layer 14 and is visible (i.e., the portion overlapping with the opening area 40) can be covered by the frame 20 or the vehicle's interior trim material 90. That is, after confirming the presence of air bubbles in the opening area 40 during the individual inspection process of the laminated glass 10, the opening area 40 can be covered by other components (the frame 20 or the vehicle's interior trim material 90) so that it is not visible from the outside. In this way, while it is visible during the inspection process, the outer periphery 15A of the functional film 15 can be hidden after the laminated glass 10 is assembled. Furthermore, when the laminated glass 10 is used as a side window (side door glass), the opening area can also be covered by the door panel and not visible from the outside.

[0128] Figure 6 This is a diagram illustrating the area of ​​the laminated glass 10 covered by the interior trim material 90 when the laminated glass 10 is mounted on a vehicle. Figure 6In the example shown, the portion of the outer periphery 15A of the functional film 15 that is not covered by the shielding layer 14 and is visible (i.e., the opening area 40) is covered by the interior trim material 90. The interior trim material 90, viewed from above, has an annular shape surrounding the central portion of the laminated glass 10. The inner periphery surrounded by the interior trim material 90 becomes a window visible to passengers. The interior trim material 90 is as follows... Figure 6 As shown, from Figure 1 The inner perimeter position 90A, indicated by the dashed line, is completely covered outwards.

[0129] The opening area 40 can be formed in multiple locations. Figure 7 This is a schematic diagram showing an example of the formation of the opening region 40. Figure 7 The image shown is related to Figures 1 to 6 The example shown is another example of laminated glass 10 with a different shape than the triangular laminated glass 10 shown. Figure 7 The laminated glass 10 shown is roughly shaped as a parallelogram, but its structure and the composition of its components are different from those of the other components. Figures 1 to 6 The example shown is the same. Figure 7 In this example, opening regions 40A, 40B, 40C, 40D, and 40E are formed on the inner surface shielding layer 14A. Opening region 40A is located at the formation site of the electrode 30, specifically at the location of the straight section SL. Opening region 40A is located at the upper edge of the laminated glass 10. Opening region 40A is formed on the shielding layer 14 (inner surface shielding layer 14A) at the upper edge in such a way that a portion of the outer periphery of the functional film 15 at the upper edge is exposed.

[0130] Opening regions 40B and 40E are formed in the inner surface shielding layer 14A. Figure 7 On the first side 14A1 and the second side 14A2 at both ends in the left and right directions. Figure 7 In this example, the inner surface shielding layer 14A includes a first side 14A1 and a second side 14A2 that is wider than the first side 14A1. In this case, it is preferable to form an opening region 40E on the second side 14A2. This is because, in the wider portion of the inner surface shielding layer 14A, the distance from the outer periphery of the glass plate (first glass plate 11 or second glass plate 12) to the outer periphery 15A of the functional film 15 tends to increase. Figure 7As shown in the example, an opening region 40B can also be formed on the narrower first side 14A1. Thus, an opening region 40E is provided on the other side of the laminated glass 10, namely the second side 14A2. The opening region 40E is formed on the shielding layer 14 (inner surface shielding layer 14A) on the second side 14A2 in such a way that a portion of the outer periphery 15A of the functional film 15 at the other side is exposed. An opening region 40B is provided on one side of the laminated glass 10, namely the first side 14A1. The opening region 40B is formed on the shielding layer 14 (inner surface shielding layer 14A) on the first side 14A1 in such a way that a portion of the outer periphery of the functional film 15 at one side is exposed.

[0131] An opening region 40C is formed at the corner CR where adjacent sides of the inner surface shielding layer 14A are connected. Figure 7 In this design, an opening region 40C is provided at a corner CR of one side and one bottom edge of the laminated glass 10. The opening region 40C is formed on a shielding layer 14 (inner surface shielding layer 14A) at the corner CR of the side and one bottom edge in such a way that the corner of the outer periphery 15A of the functional film 15 is exposed. At the corner CR, the distance from the outer periphery of the glass plate (first glass plate 11 or second glass plate 12) to the outer periphery 15A of the functional film 15 is also easily increased, so it is preferable to form the opening region 40C so that the generation of bubbles can be confirmed.

[0132] An opening region 40D is formed on the side of the inner surface shielding layer 14A in the direction opposite to that of the side where the opening region 40A is formed. That is, the opening region 40D is located at the lower edge of the laminated glass 10. The opening region 40D is formed on the shielding layer 14 (inner surface shielding layer 14A) at the lower edge in such a way that a portion of the outer periphery 15A of the functional film 15 at the lower edge is exposed. It can also be like... Figure 7 As shown, the opening regions 40 are formed on each side of the inner surface shielding layer 14A.

[0133] Figure 7In this example, the length of the opening region 40 exposing either side of the outer periphery 15A of the functional film 15 is shorter than the length of the region covered by the shielding layer 14 (inner surface shielding layer 14A) along that side. For example, the opening region 40B is formed on the edge of the outer periphery 15A of the functional film 15 that overlaps with the first edge 14A1 of the inner surface shielding layer 14A, and the length L0 of the opening region 40B along that edge is shorter than the length of the region covered by the shielding layer 14 in the first edge 14A1. The length of the region covered by the shielding layer 14 in the first edge 14A1 is the length obtained by subtracting the length L0 of the opening region 40B from the length Ls of the first edge 14A1 (Ls-L0). Similarly, the opening region 40E is shorter than the length of the region covered by the shielding layer 14 in the second edge 14A2. In this way, it is possible to confirm whether there are air bubbles at the outer periphery 15A of the functional film 15 while avoiding unnecessary exposure of the outer periphery 15A.

[0134] The opening region 40A is formed at the minimum distance D (refer to...) Figure 5 The opening regions 40B, 40C, 40D, and 40E are formed at locations where the minimum distance D is less than 12 mm. Thus, the specified areas that can be seen without being covered by the shielding layer 14 may include a first specified area (opening region 40A) where the minimum distance D is more than 12 mm and a second specified area (opening regions 40B to 40E) where the minimum distance D is less than 12 mm.

[0135] By using the opening regions 40A to 40E, in addition to confirming the generation of bubbles at the outer periphery 15A of the functional film 15, the position (position in top view) of the functional film 15 in the laminated glass 10 can also be confirmed. That is, based on the position of the outer periphery 15A of the functional film 15 inside the opening regions 40A to 40E, it can be confirmed whether the position of the functional film 15 inside the laminated glass 10 falls within the allowable range.

[0136] Furthermore, if the edge of the outer periphery 15A of the functional film 15 is not visible in the opening regions 40B to 40E formed at a minimum distance D of less than 12 mm, it can be concluded that the position of the functional film 15 is significantly deviated. By considering the positional deviation, it is also possible to screen out glass that may have generated bubbles at a position further inward than the opening region 40A where the bubble generation needs to be confirmed.

[0137] From the viewpoint of confirming positional deviation, it is preferable to form opening regions 40 on two adjacent sides of the inner surface shielding layer 14A. For example, the positional deviation can be confirmed by opening regions 40A and 40B or 40E. Figure 7The functional membrane 15 is subject to longitudinal and lateral positional deviations. Markings indicating the correct (designed) position of the outer periphery 15A of the functional membrane 15 are provided on the periphery (surface of the inner surface shielding layer 14A) of the opening regions 40A to 40E. By comparing the marked positions with the actual positions of the outer periphery 15A within the opening regions 40, the positional deviation of the functional membrane 15 can be easily confirmed. Furthermore, the opening regions 40 can be formed on two adjacent sides of the inner surface shielding layer 14A, or on three or more sides.

[0138] Figure 8 This is an enlarged top view showing an example of an opening area. Figure 8 The image shows the formation of the opening region 40 in the laminated glass 10 from a top-down view of the second glass panel 12 from inside the vehicle. Figure 8 In the diagram, the central side of the laminated glass 10 is provided with the functional film 15, located in the direction below the outer periphery 15A of the functional film 15. The intermediate film 13C surrounding the functional film 15 is provided in the direction above the outer periphery of the laminated glass 10, located in the direction above the outer periphery 15A.

[0139] Preferably, from a top view of the second glass plate 12, the opening region 40 (opening region 40A to opening region 40E) starts from a position closer to the center than the outer periphery 15A of the functional film 15, spans the outer periphery 15A of the functional film 15, and is formed at a position that overlaps with a portion of the intermediate film 13C adjacent to the outer periphery 15A of the functional film 15.

[0140] That is, from the top view of the second glass plate 12, the opening region 40 is formed from the outer periphery 15A of the functional film 15 towards the central side over the entire first length L1. Furthermore, from the top view of the second glass plate 12, the opening region 40 is formed from the outer periphery 15A of the functional film 15 towards the intermediate film 13C side (outer side) over the entire second length L2. The first length L1 and the second length L2 are greater than 0 mm.

[0141] This allows the outer periphery 15A of the functional film 15 to be clearly seen within the opening region 40. That is, the position of the outer periphery 15A from the top view of the second glass plate 12 is actually within a certain tolerance range. For example, if the laminated glass 10 is designed such that the position of the outer periphery 15A coincides with the inner periphery IE of the opening region 40 (i.e., in the same plane), even if the operator observes the opening region 40, they cannot determine whether the position of the outer periphery 15A coincides with the inner periphery IE of the opening region 40, or whether the outer periphery 15A, which is offset outwards from the inner periphery IE, is covered by the shielding layer 14. By including portions of the opening region 40 near the functional film 15 side and the intermediate film 13C side relative to the outer periphery 15A (each portion of the first length L1 and the second length L2), the outer periphery 15A of the functional film 15 can be reliably positioned within the opening region 40. Therefore, it is possible to reliably confirm whether there are air bubbles at the outer periphery 15A.

[0142] The first length L1 and the second length L2 can be the same or different. By setting the first length L1 and the second length L2 accordingly with respect to the tolerance range, the opening area 40 will not become too small. Therefore, even if the position of the outer periphery 15A deviates from the design value, the outer periphery 15A can be configured sufficiently close to the inside of the opening area 40.

[0143] also, Figure 8 In the illustration, for clarity, the outer periphery 15A of the functional film 15 is shown as a black line. However, for example, when the functional film 15 and the intermediate film 13C are transparent, the boundary between them is difficult to contrast, making the outer periphery 15A visually difficult to discern. Therefore, Figure 8 The example shown is an application of a mark 70 to the opening region 40. That is, in the top view of the second glass plate 12, a mark 70 (mark 70A) indicating the position of the outer periphery 15A of the functional membrane 15 is formed at a position adjacent to or inside the opening region 40.

[0144] Mark 70 is a marker used to identify the position of the outer periphery 15A of the functional film 15. Mark 70 is formed to show the correct position (designed position) of the outer periphery 15A. Even if the actual position of the outer periphery 15A deviates from the tolerance range, the outer periphery 15A can be easily identified by using the indicated position of mark 70 as a clue. Mark 70 is preferably in the shape of an arrow or line, etc., to indicate the position (designed position) of the outer periphery 15A with pinpoints. Figure 8 In the middle, mark 70 forms a triangle with its vertex pointing to the position of the outer perimeter 15A. Figure 8 In the middle, mark 70 extends in the direction of the outer periphery 15A of the functional membrane 15 ( Figure 8The outer periphery 15A is respectively provided on both sides (a pair) of the opening area 40 in the left and right directions, but it can also be provided on only one side. When the position of the outer periphery 15A is in the correct position, the outer periphery 15A will be arranged on the line segment formed by connecting the indicated positions of the marks 70 on both sides. Because the position of the outer periphery 15A can be easily found, it is easy to check whether there are air bubbles at the outer periphery 15A. Moreover, as described above, according to the magnitude of the deviation between the indicated position of the mark 70 and the position of the outer periphery 15A of the functional film 15, it is also possible to confirm whether the position of the functional film 15 inside the laminated glass 10 falls within the allowable range.

[0145] Figure 8 In the example, the mark 70 has a planar shape smaller than the opening region 40. The mark 70 is formed, for example, from a small opening region adjacent to the inner periphery IE of the opening region 40 within the shielding layer 14. That is, like the opening region 40, the mark 70 can also be formed as a region where the shielding layer 14 is not formed. The mark 70 can also constitute part of the inner periphery IE of the opening region 40. For example, the mark 70 can be a protrusion formed inward from the inner periphery IE, or it can be a recessed portion formed outward from the inner periphery IE. The mark 70 can be applied to the surface of the shielding layer 14 or the surface of a glass plate located inside the opening region 40 using ink or the like. For example, as... Figure 8 As hypothetically shown by double-dotted lines, or in conjunction with mark 70, mark 70A may be applied on the surface (third or fourth surface) of the second glass plate 12 inside the opening region 40.

[0146] (Manufacturing method of laminated glass)

[0147] Next, the manufacturing method of the laminated glass 10 described above will be explained. When manufacturing the laminated glass 10, an interlayer film 13 and a functional film 15 are sandwiched between a first glass plate 11 and a second glass plate 12 to prepare a laminate. Then, for example, the laminate is placed in a rubber bag and pressed in a vacuum with a gauge pressure of -100 kPa to -65 kPa and a temperature of approximately 50°C to 110°C. The heating conditions, temperature conditions, vacuum conditions, and lamination method for pressing are appropriately selected considering the properties of the light-adjusting layer 18 to prevent its deterioration during lamination. Clamping rollers or the like can also be used instead of a rubber bag for the pressing process.

[0148] Furthermore, after the aforementioned pressing process, for example, by performing a pressing treatment in an autoclave at a temperature of 80°C to 150°C and a pressure of 0.6 MPa to 1.3 MPa, a laminated glass 10 with superior durability can be obtained. However, depending on the circumstances, considering the simplification of the process and the characteristics of the material encapsulated in the laminated glass 10, this heating and pressurizing process is sometimes omitted.

[0149] When using an open-cell adhesive film (OCA) as the interlayer 13 in the process of manufacturing the laminate, the first laminate can also be formed by bonding the dimming layer 18 and the interlayer 13C to the second glass plate 12 through the interlayer 13B, and the first glass plate 11 can be bonded to the dimming layer 18 of the first laminate through the interlayer 13A to form the laminate. In this case, an adhesive film can also be used as the interlayer 13. If the outer periphery of the dimming layer 18 can be surrounded by only the interlayer 13A and the interlayer 13B, the frame-shaped interlayer 13C is not required.

[0150] Temperature and vacuum conditions can be appropriately selected based on the properties of the intermediate film 13 and the dimming layer 18 to prevent them from deteriorating during lamination.

[0151] Furthermore, when using an open-cell resin (OCR) as the interlayer 13 in the process of manufacturing the laminate, for example, the position of the dimming layer 18 in the space between the second glass plate 12 and the first glass plate 11 is fixed. Then, the space between the second glass plate 12 and the first glass plate 11 is sealed with tape or the like, separating the space from the outside. Subsequently, the open-cell resin is injected into the space, filling it completely. The interlayer 13 is then formed by curing the open-cell resin. The curing method of the open-cell resin is arbitrary, and examples include heat curing, light curing, and moisture curing.

[0152] Furthermore, when the laminated glass 10 is curved, the first glass plate 11 and the second glass plate 12 can be bent and formed using conventionally known bending methods. For example, the first glass plate 11 and the second glass plate 12 can be overlapped, placed in an annular mold, and heated above their softening point, and bent and formed by their own weight. Alternatively, the first glass plate 11 and the second glass plate 12 can be pressed and formed separately or overlapped after being heated.

[0153] In addition, the above manufacturing process of laminated glass 10 is an example. For example, laminated glass 10 can also be manufactured by cold bending method.

[0154] (Second Implementation)

[0155] Next, the laminated glass 10 of the second embodiment will be described. Figure 9 This is a schematic diagram of the laminated glass 10 according to the second embodiment.

[0156] In the second embodiment, the laminated glass 10 is configured as a vehicle door glass. The door glass is mounted so that it can move (raise and lower) under the action of a door glass moving mechanism 91 provided by the vehicle. Therefore, the laminated glass 10 of the second embodiment has a connecting portion 50 for mounting on the moving mechanism 91. The moving mechanism 91 is, for example, an electric window mechanism provided by a vehicle, including an electric motor and a power transmission mechanism.

[0157] A connecting portion 50 is disposed on at least one of the first glass plate 11 and the second glass plate 12. The connecting portion 50 is a part of the glass plate. It is a protruding portion disposed on the outer periphery of the glass and projecting outwards when viewed from above. Figure 9 As shown in the example, the connecting portion 50 is typically formed to protrude downward from the lower edge of the laminated glass 10. A fastener 51 for fixing to the moving mechanism 91 is mounted on the connecting portion 50, or a through hole for fixing is formed therein. Figure 9 The image shows an example of a fastener 51 installed on the connecting part 50.

[0158] The laminated glass 10 can be divided into a window portion 55, which functions as a window in the vehicle door, and a connecting portion 50. The window portion 55 is the part exposed within the window frame of the door and is visible from both inside and outside the vehicle. The connecting portion 50 is always located outside the window frame (whether the window is fully open or fully closed) and is concealed by the vehicle's interior and exterior trim materials. The connecting portion 50 does not need to be provided on both the first glass panel 11 and the second glass panel 12. For example, one of the first glass panel 11 and the second glass panel 12 can be formed in the shape of the window portion 55 (without forming the connecting portion 50), while both the window portion 55 and the connecting portion 50 can be formed on the other of the first glass panel 11 and the second glass panel 12.

[0159] The functional film 15 is formed in the area of ​​the window portion 55, but not on the connecting portion 50. Therefore, the shielding layer 14 (inner surface shielding layer 14A and outer surface shielding layer 14B) is formed as a strip along the outer periphery 15A of the functional film 15 in the top view of the second glass plate 12, but not on the connecting portion 50.

[0160] In the second embodiment, from the top view of the second glass plate 12, at least part or all of the outer periphery 15A of the functional film 15, at least the edge (i.e. the lower edge 15B) closest to the connecting portion 50, is not covered by the shielding layer 14 and can be seen. Figure 10 This is a top view showing the enlarged opening area of ​​the second embodiment. (Example) Figure 10As shown, in the inner surface shielding layer 14A, an opening region 40 is formed at a predetermined location overlapping the lower edge 15B of the outer periphery 15A of the functional film 15. The connecting portion 50 protrudes outward from the outer periphery of the glass, thus the minimum distance D from the outer periphery 15A of the functional film 15 to the outer periphery of the glass increases at the location where the connecting portion 50 is formed. Therefore, by providing the opening region 40, it is possible to confirm the generation of bubbles at the outer periphery 15A of the functional film 15, located away from the outer periphery of the glass.

[0161] Figure 10 In this example, the opening region 40 is formed along the entire edge of the outer periphery 15A of the functional film 15, on the side closest to the connecting portion 50 (lower edge 15B). A portion BR of the opening region 40 is also a portion of the electrode 30 (wiring 31) on which the functional film 15 is formed.

[0162] Thus, in the second embodiment, in the laminated glass 10 with a connecting portion 50 used for car door glass, an opening region 40 is formed at the portion corresponding to the boundary between the window portion 55 and the connecting portion 50.

[0163] (The shape of the opening area)

[0164] The opening region 40 is not limited to the shape shown in the first and second embodiments. Next, an example of the formation of the opening region 40 will be described. The opening region 40 can... Figures 11 to 13 The shape shown is formed.

[0165] Figure 11 This is a schematic diagram showing the annular opening region 40. Figure 11 In this context, the opening region 40 is an annular region that divides (cuts) the inner surface shielding layer 14A into a first inner circumferential portion 61 and a second outer circumferential portion 62. The inner surface shielding layer 14A is generally formed in an annular shape surrounding the entire outer circumference 15A of the functional film 15. The first portion 61 of the inner surface shielding layer 14A is formed in an annular shape surrounding the central portion of the laminated glass 10. The second portion 62 of the inner surface shielding layer 14A is formed in an annular shape along the outer circumference of the laminated glass 10. The opening region 40 is formed in an annular shape between the first portion 61 and the second portion 62, surrounding the entire outer circumference 15A of the functional film 15. Therefore, Figure 11 In the view from above the second glass plate 12, the outer periphery 15A of the functional film 15 is completely uncovered by the shielding layer 14 and can be seen. Figure 11 In the diagram, the entire outer periphery of a portion of the functional film 15, shown in color, is visible from the opening region 40. The first portion 61 and the second portion 62 of the inner surface shielding layer 14A are completely separated. However, it is also possible that a portion of the opening region 40 is broken at one or more points while the first portion 61 and the second portion 62 are partially connected.

[0166] Figure 12 This is a schematic diagram showing the opening region 40 formed by the holes. Figure 12 It is a hole (opening) formed, in view from top, between the inner periphery 63 and the outer periphery 64 of the inner surface shielding layer 14A, similar to the opening region 40 shown in the first and second embodiments. The opening region 40 has a closed annular periphery. Figure 12 In this process, the opening region 40 is partially formed between the inner periphery 63 and the outer periphery 64 of the inner surface shielding layer 14A. The range (length) of the opening region 40 is arbitrary. Figure 12 In the above view, the opening region 40 is formed to overlap with one edge (lower edge 15B) of the outer periphery 15A of the functional membrane 15. The opening region 40 may also be formed on another edge (upper edge 15C) opposite to one edge (lower edge 15B) in the above view. Alternatively, the opening region 40 may also be as follows... Figure 7 As shown, opening regions 40 are formed on each side of the outer periphery 15A of the functional membrane 15. Furthermore, if opening regions 40 are formed on each side and the opening regions 40 on each side are interconnected, this is equivalent to... Figure 11 The annular opening region 40.

[0167] Figure 13 This is a schematic diagram showing the opening region 40 formed by the notch. Figure 13 In the inner surface shielding layer 14 (inner surface shielding layer 14A), opening regions 40F, 40G, and 40H are formed. Opening regions 40F, 40G, and 40H are notches extending from the periphery of the inner surface shielding layer 14A. The periphery of the opening regions 40F, 40G, and 40H is not closed into a ring shape, but is partially open. Opening regions 40F and 40G are notches extending from the outer periphery 64 of the inner surface shielding layer 14A towards the center of the laminated glass 10. Opening region 40H is a notch extending from the inner periphery 63 of the inner surface shielding layer 14A towards the outside of the laminated glass 10. Opening regions 40F, 40G, and 40H all extend from the periphery (outer periphery 64 or inner periphery 63) of the inner surface shielding layer 14A to a position overlapping a portion of the outer periphery 15A of the functional film 15, thereby allowing a portion of the outer periphery 15A of the functional film 15 to be seen.

[0168] The opening region 40 in the above embodiments can be one of these... Figures 11 to 13 Any of the shapes shown. Furthermore, in the shielding layer 14, the opening region 40 can be formed not only on the inner surface shielding layer 14A, but also on the outer surface shielding layer 14B, or on both the inner surface shielding layer 14A and the outer surface shielding layer 14B. When multiple opening regions 40 are provided, any one or more of the following can be provided: holes, notches, and annular regions. That is, two or three of the following can be mixed: holes, notches, and annular regions.

[0169] (Effect)

[0170] The laminated glass 10 of the first embodiment of this disclosure includes: a first glass plate 11 and a second glass plate 12, a functional film 15 located between the first glass plate 11 and the second glass plate 12, an intermediate film 13 surrounding the outer periphery 15A of the functional film 15, and a shielding layer 14 that partially overlaps with the functional film 15 when viewed from above. At least a portion of the outer periphery 15A of the functional film 15 is not covered by the shielding layer 14 and can be seen when viewed from above the second glass plate 12.

[0171] Therefore, even when the functional film 15 is covered by the shielding layer 14, the bubble detection area at the outer periphery 15A of the functional film 15 can be seen, thus confirming whether bubbles are generated at the outer periphery 15A of the functional film 15.

[0172] The laminated glass 10 of the second embodiment of this disclosure is as described in the laminated glass 10 of the first embodiment, wherein the shielding layer 14 includes an inner surface shielding layer 14A disposed on the main surface of the second glass plate 12 or disposed between the functional film 15 and the second glass plate 12. From a top view of the second glass plate 12, the inner surface shielding layer 14A has an opening region 40 at a location where it overlaps with a portion of the outer periphery 15A of the functional film 15. This allows for confirmation of the presence or absence of air bubbles at the outer periphery 15A of the functional film 15 via the opening region 40.

[0173] The laminated glass 10 of the third embodiment of this disclosure is as described in the laminated glass 10 of the second embodiment, wherein the inner surface shielding layer 14A is formed in a strip shape along the outer periphery 15A of the functional film 15 from the top view of the second glass plate 12. In this way, while a portion of the outer periphery 15A of the functional film 15 is visible, the area along the outer periphery 15A of the functional film 15 can be covered from the outside, thus hiding it. This suppresses the degradation of the outer periphery 15A of the functional film 15 due to ultraviolet radiation. Furthermore, the electrodes 30 and electrode extension wiring 31 electrically connected to the functional film 15 can be hidden, making them difficult to see from the inside of the vehicle.

[0174] The laminated glass 10 of the fourth embodiment of this disclosure is as described in the laminated glass 10 of the second or third embodiment, wherein, in a top view of the second glass plate 12, the inner surface shielding layer 14A covers the entire outer periphery 15A of the functional film 15, except for the opening area 40. In this way, by covering and hiding the entire outer periphery 15A of the functional film 15 except for the bubble detection area through the opening area 40, degradation caused by ultraviolet radiation can be effectively suppressed.

[0175] The laminated glass 10 of the fifth embodiment of this disclosure is as described in the laminated glass 10 of the third or fourth embodiment, wherein the inner surface shielding layer 14A includes a first side 14A1 and a second side 14A2 that is wider than the first side 14A1, and an opening region 40 is formed on the second side 14A2. On the wider second side 14A2, the outer periphery 15A of the functional film 15 is easily positioned away from the outer periphery of the glass plate. Therefore, by forming the opening region 40 in this portion, it is possible to confirm the generation of bubbles in the portion of the outer periphery 15A of the functional film 15 that is away from the outer periphery of the glass plate.

[0176] The laminated glass 10 of the sixth embodiment of this disclosure is as described in any of the laminated glass 10s in the second to fifth embodiments, wherein the opening region 40 includes one or more of the following: a hole partially formed between the inner periphery 63 and the outer periphery 64 of the inner surface shielding layer 14A; a notch extending from the periphery of the inner surface shielding layer 14A; and an annular region dividing the inner surface shielding layer 14A into a first inner periphery portion 61 and a second outer periphery portion 62. In this way, an opening region 40 of a suitable shape can be formed corresponding to the location in the outer periphery 15A of the functional film 15 where bubble generation is to be confirmed.

[0177] The laminated glass 10 of the seventh embodiment of this disclosure is as described in any of the second to sixth embodiments, wherein an inner surface shielding layer 14A is disposed on the main surface of the second glass plate 12 in the direction opposite to that of the functional film 15. Since the inner surface shielding layer 14A is located on the outer surface (the surface facing the interior of the vehicle) of the second glass plate 12, the second glass plate 12 can be protected by the inner surface shielding layer 14A. Furthermore, if necessary, the opening region 40 can be formed by post-processing after the laminated glass 10 is laminated.

[0178] The laminated glass 10 of the eighth embodiment of this disclosure is as described in any of the laminated glass 10s in the second to seventh embodiments, wherein the shielding layer 14 includes an outer surface shielding layer 14B disposed on the main surface of the first glass plate 11 or disposed between the functional film 15 and the first glass plate 11. This allows the outer surface shielding layer 14B and the inner surface shielding layer 14A to be formed on the first glass plate 11 and the second glass plate 12 respectively, enabling the electrode 30 and the electrode extension wiring 31 to be completely hidden from both the outside and inside of the vehicle. Furthermore, when these outer surface shielding layers 14B and inner surface shielding layers 14A are directly formed on the main surfaces of the first glass plate 11 and the second glass plate 12 from a high-rigidity material such as ceramic, the bending tendency of the first glass plate 11 and the second glass plate 12 can be made consistent.

[0179] The laminated glass 10 of the ninth embodiment of this disclosure is as described in any of the laminated glass 10s in the first to eighth embodiments, wherein the thickness of the functional film 15 is 0.1 mm or more. When the thickness of the functional film 15 is so large, it becomes a structure in which the outer periphery 15A of the functional film 15 is surrounded by a picture frame-shaped intermediate film 13C. Bubbles are easily generated at the outer periphery 15A of the functional film 15, so it is particularly useful to have a structure that can confirm whether there are bubbles at the outer periphery 15A of the functional film 15.

[0180] The laminated glass 10 of the tenth embodiment of this disclosure is as described in any of the first to ninth embodiments, wherein, from a top view of the second glass plate 12, a specified portion of the outer periphery 15A of the functional film 15 is not covered by the shielding layer 14 and can be seen. This specified portion includes a portion where the minimum distance D from the outer periphery of the first glass plate 11 or the outer periphery of the second glass plate 12 is 12 mm or more from the top view. Therefore, when the laminated glass 10 having the functional film 15 is configured as safety glass for vehicles, it is easy from the outside to confirm whether there are air bubbles in the specified portion (a portion 12 mm or more, particularly 13 mm or more, from the outer periphery of the glass).

[0181] The laminated glass 10 of the eleventh embodiment of this disclosure is as described in the laminated glass 10 of the tenth embodiment, wherein the defined portions include a first defined portion (the forming portion of the opening region 40A) with a minimum distance D of 12 mm or more and a second defined portion (the forming portions of the opening regions 40B to 40E) with a minimum distance D of less than 12 mm. Therefore, based on the confirmation of a positional deviation of the functional film 15 at the second defined portion, it is possible to consider this positional deviation to confirm whether there are bubbles at the first defined portion. Thus, it is possible to screen out laminated glass 10 that may have bubbles that cannot be confirmed from the first defined portion due to positional deviation.

[0182] The laminated glass 10 of the twelfth embodiment of this disclosure is as described in any of the laminated glass 10s in the first to eleventh embodiments, wherein the functional film 15 has an electrode 30 at a portion of its outer periphery, and in a top view of the second glass plate 12, at least the portion of the electrode 30 formed in the outer periphery 15A of the functional film 15 is not covered by the shielding layer 14 and is visible. This allows for easy external confirmation of the presence or absence of air bubbles at the portion of the electrode 30 formed (the connection portion with the wiring 31).

[0183] The laminated glass 10 of the thirteenth embodiment of this disclosure is as described in any of the first to twelfth embodiments, wherein at least one of the first glass plate 11 and the second glass plate 12 has a connecting portion 50 protruding outward and mounted on the moving mechanism 91 on the outer periphery of the glass when viewed from above. In the view from above of the second glass plate 12, at least a portion of the outer periphery 15A of the functional film 15, at least the edge closest to the connecting portion 50, is not covered by the shielding layer 14 and is visible. Therefore, even when the laminated glass 10 with the functional film 15 is configured as a switchable window such as a car door, it is easy to confirm from the outside whether there are air bubbles in areas away from the outer periphery of the glass.

[0184] The laminated glass 10 of the fourteenth embodiment of this disclosure is as described in any of the laminated glass 10s in the first to thirteenth embodiments, wherein at least one of the first glass plate 11 and the second glass plate 12 includes an outwardly convex curved portion CV on the outer periphery of the glass when viewed from above, and the functional film 15 has a straight portion SL on its outer periphery that faces the curved portion CV when viewed from above. In the view from above of the second glass plate 12, at least a portion of the straight portion SL on the outer periphery 15A of the functional film 15 is not covered by the shielding layer 14 and is visible. At this time, although the straight portion SL on the outer periphery 15A of the functional film 15 is easily positioned away from the outer periphery of the glass (curved portion CV), it is also easy to confirm from the outside whether there are air bubbles in the portion away from the outer periphery of the glass.

[0185] The laminated glass 10 of the fifteenth embodiment of this disclosure is as described in any of the first to fourteenth embodiments, wherein the functional film 15 includes any one of a dimming film, an electrothermal film, a light-emitting display film, and a solar cell film. This allows the laminated glass 10 to be given the desired function. In this case, the generation of peripheral bubbles, which may be a cause of deterioration of the functional film 15, can also be easily identified.

[0186] The laminated glass 10 of the sixteenth embodiment of this disclosure is as described in any of the laminated glass 10s in the second to eighth embodiments, wherein, in a top view of the second glass plate 12, the opening region 40 starts from a position closer to the center than the outer periphery 15A of the functional film 15, extends across the outer periphery 15A of the functional film 15, and is formed at a position that overlaps with a portion of the intermediate film 13C adjacent to the outer periphery 15A of the functional film 15. Therefore, even if the position of the outer periphery 15A in the top view of the second glass plate 12 deviates within tolerance, the outer periphery 15A of the functional film 15 can be seen more reliably in the inner region of the opening region 40.

[0187] The laminated glass 10 of the seventeenth embodiment of this disclosure is as described in the laminated glass 10 of the sixteenth embodiment, wherein, in a top view of the second glass plate 12, the opening region 40 is formed from the outer periphery 15A of the functional film 15 toward the central side over the entire first length L1, and in a top view of the second glass plate 12, the opening region 40 is formed from the outer periphery 15A of the functional film 15 toward the intermediate film 13C over the entire second length L2. Therefore, by setting the first length L1 and the second length L2 accordingly to the tolerance range, even if the position of the outer periphery 15A deviates from the design value, the outer periphery 15A can be positioned sufficiently close to the inside of the opening region 40.

[0188] The laminated glass 10 of the eighteenth embodiment of this disclosure is as described in any of the laminated glass 10s in the second to eighth embodiments, wherein, from a top view of the second glass plate 12, a mark 70 (or mark 70A) indicating the position of the outer periphery 15A of the functional film 15 is formed at a position adjacent to or inside the opening region 40. Therefore, when observing the opening region 40, the position of the outer periphery 15A of the functional film 15 can be easily identified using the indicated position of mark 70 as a clue. As a result, it is easy to check whether there are air bubbles at the outer periphery 15A. Furthermore, based on the deviation between the indicated position of mark 70 and the position of the outer periphery 15A of the functional film 15, it is also possible to confirm whether the position of the functional film 15 inside the laminated glass 10 falls within the allowable range.

[0189] The window unit 1 according to the nineteenth embodiment of this disclosure includes: a laminated glass 10 according to any one of the first to eighteenth embodiments, and a frame 20 disposed on the periphery of the laminated glass 10 and mountable on a vehicle. The portion of the outer periphery 15A of the functional film 15 that is not covered by the shielding layer 14 and is visible is covered by the frame 20, the vehicle's interior trim material 90, or the vehicle's door panel. Therefore, during inspection of the laminated glass 10 before assembling the frame 20, the generation of air bubbles at the outer periphery 15A of the functional film 15 can be easily confirmed. Furthermore, after assembling the frame 20 or after assembling the window unit 1 on the vehicle, the portion visible that is not covered by the shielding layer 14 can be hidden from the outside. Therefore, even when the shielding layer 14 is provided in a manner that allows the outer periphery 15A of the functional film 15 to be visible, the aesthetics of the assembled product can be prevented from being affected.

[0190] The embodiments of the present invention have been described above, but the content of these embodiments is not limited to these embodiments. Furthermore, the aforementioned constituent elements include those that are readily conceived by those skilled in the art, those that are substantially the same, and those within the so-called equivalent scope. Moreover, the aforementioned constituent elements can be appropriately combined. Furthermore, various omissions, substitutions, or modifications of the constituent elements can be made without departing from the spirit of the aforementioned embodiments.

[0191] Symbol Explanation

[0192] 1. Window unit

[0193] 10. Laminated glass

[0194] 11 First Glass Plate

[0195] 12 Second glass plate

[0196] 13, 13A, 13B, 13C Intermediate Membrane

[0197] 14. Shielding layer

[0198] 14A Inner Surface Shielding Layer

[0199] 14A1 First Side

[0200] 14A2 Second Side

[0201] 14B Outer Surface Shielding Layer

[0202] 15 Functional Membranes

[0203] 15A Peripheral

[0204] 15B (below)

[0205] 15C Above

[0206] 16 Substrate

[0207] 16A Transparent Substrate

[0208] 16B transparent substrate

[0209] 17 Conductive film

[0210] 17A Transparent Conductive Film

[0211] 17B Transparent Conductive Film

[0212] 18 dimming layers

[0213] 20 Frames

[0214] Electrodes 30, 30A, and 30B

[0215] Wiring for 31, 31A, and 31B

[0216] 32 Control Department

[0217] 33 Terminal section

[0218] Opening areas: 40, 40A, 40B, 40C, 40D, 40E, 40F, 40G, 40H

[0219] 50 Connecting part

[0220] 51 Fastener

[0221] 55 Window

[0222] 61 Part One

[0223] 62 Part Two

[0224] 63 inner periphery

[0225] 64 Peripheral edge

[0226] 70, 70A markings

[0227] 90 Interior decoration materials

[0228] 90A Inner Peripheral Position

[0229] 91 Mobile Organization

[0230] CR corner

[0231] CV curve section

[0232] D Minimum distance

[0233] L1 First Length

[0234] L2 Second Length

[0235] P1 position

[0236] P2 position

[0237] P3 position

[0238] SL straight section

Claims

1. A laminated glass comprising: First glass plate and second glass plate The functional membrane located between the first glass plate and the second glass plate The intermediate membrane surrounding the outer periphery of the functional membrane, and The shielding layer that overlaps with the functional membrane when viewed from above. From a top-down view of the second glass plate, at least a portion of the outer periphery of the functional membrane is visible, as it is not covered by the shielding layer.

2. The laminated glass as described in claim 1, wherein, The shielding layer includes an inner surface shielding layer disposed on the main surface of the second glass plate or disposed between the functional film and the second glass plate. From a top view of the second glass plate, the inner surface shielding layer has an opening area where it overlaps with a portion of the outer periphery of the functional membrane.

3. The laminated glass as described in claim 2, wherein, The inner surface shielding layer is formed in a strip shape along the outer periphery of the functional membrane when viewed from above by the second glass plate.

4. The laminated glass as described in claim 3, wherein, From a top-down view of the second glass plate, the inner surface shielding layer covers the entire outer periphery of the functional membrane, except for the opening area.

5. The laminated glass as described in claim 3, wherein, The inner surface shielding layer includes a first side and a second side that is wider than the first side. The opening area is formed on the second side.

6. The laminated glass as described in claim 2, wherein, The opening region includes any one or more of the following: The hole formed between the inner and outer peripheries of the inner surface shielding layer A notch extending from the periphery of the inner surface shielding layer, The inner surface shielding layer is divided into annular regions consisting of a first inner circumference and a second outer circumference.

7. The laminated glass as described in claim 2, wherein, The inner surface shielding layer is disposed on the main surface of the second glass plate in the direction opposite to that of the functional membrane.

8. The laminated glass as described in claim 2, wherein, The shielding layer includes an outer surface shielding layer disposed on the main surface of the first glass plate or disposed between the functional film and the first glass plate.

9. The laminated glass as claimed in claim 1, wherein, The thickness of the functional membrane is greater than 0.1 mm.

10. The laminated glass as claimed in claim 1, wherein, From a top-view perspective of the second glass plate, a designated portion of the outer periphery of the functional membrane is not covered by the shielding layer and can be seen. The specified location includes the location where the minimum distance from the outer periphery of the first glass plate or the outer periphery of the second glass plate is more than 12 mm when viewed from above.

11. The laminated glass of claim 10, wherein, The specified locations include a first specified location with a minimum distance of 12mm or more and a second specified location with a minimum distance of less than 12mm.

12. The laminated glass as claimed in claim 1, wherein, The functional membrane has electrodes at a portion of its outer periphery. From a top-down view of the second glass plate, at least the portion of the electrode formed on the outer periphery of the functional membrane is not covered by the shielding layer and is visible.

13. The laminated glass as claimed in claim 1, wherein, At least one of the first glass plate and the second glass plate has a connecting portion that protrudes outward and is mounted on a moving mechanism on the outer periphery of the glass when viewed from above. From a top-down view of the second glass plate, at least a portion of the outer periphery of the functional membrane, at least the edge closest to the connection, is not covered by the shielding layer and is visible.

14. The laminated glass as claimed in claim 1, wherein, At least one of the first glass plate and the second glass plate includes an outwardly convex curved portion on the outer periphery of the glass when viewed from above. The functional membrane, when viewed from above, has a straight portion on its outer periphery that faces the curved portion. From a top-view perspective of the second glass plate, at least a portion of the straight section of the outer periphery of the functional membrane is not covered by the shielding layer and is visible.

15. The laminated glass as claimed in claim 1, wherein, The functional film includes any one of the following: dimming film, electrothermal film, light-emitting display film, and solar cell film.

16. The laminated glass as claimed in claim 2, wherein, From a top-view perspective of the second glass plate, the opening region begins at a position closer to the center than the outer periphery of the functional membrane, extends across the outer periphery of the functional membrane, and is formed at a position that overlaps with a portion of the intermediate membrane adjacent to the outer periphery of the functional membrane.

17. The laminated glass of claim 16, wherein, From a top-view perspective of the second glass plate, the opening region is formed over the entire first length, extending from the outer periphery of the functional membrane toward the central side. From a top-down view of the second glass plate, the opening region is formed over the entire second length from the outer periphery of the functional membrane toward the intermediate membrane side.

18. The laminated glass as claimed in claim 2, wherein, From a top view of the second glass plate, a mark indicating the position of the outer periphery of the functional membrane is formed at a location adjacent to or inside the opening area.

19. A vehicle window unit, comprising: The laminated glass according to any one of claims 1 to 18, and A frame disposed at the periphery of the laminated glass and capable of being installed on a vehicle. The portion of the outer periphery of the functional membrane that is not covered by the shielding layer but is visible is covered by the frame, the interior trim material of the vehicle, or the door panel of the vehicle.

Images