Laminated glass and vehicle window unit

Abstract

The present invention inhibits a functional film from receiving scratches. Provided is a laminated glass (10) comprising: a first glass plate (11); a second glass plate (12); a functional film (15) located between the first glass plate (11) and the second glass plate (12); an interlayer film (13) surrounding the outer periphery of the functional film (15); and a shielding layer (14) partially overlapping with the functional film (15) when observed in a plan view. In a plan view of the second glass plate (12), at least a portion of the outer periphery of the functional film (15) is not covered with the shielding layer (14) and is visible.

Description

Laminated glass and vehicle window units

[0001] The present invention relates to laminated glass and vehicle window units.

[0002] Laminated glass encapsulating 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 plies. In the interlayer structure, the SPD film is surrounded at its periphery by a frame-shaped first interlayer, and is sealed by being sandwiched between a second interlayer and a third interlayer. The edges of the SPD film are concealed by black ceramic ink painted on the surface of the glass plies.

[0003] Patent No. 5666128

[0004] In the case of laminated glass provided with such a functional film, there is a need to check whether or not bubbles have occurred near the periphery of the functional film, for example, during product inspection.

[0005] The present invention has been made in view of the above-mentioned problems, and has an object to provide laminated glass that makes it possible to check whether or not bubbles have occurred on the periphery of a functional film.

[0006] The laminated glass according to the present disclosure comprises a first glass plate and a second glass plate, a functional film positioned between the first glass plate and the second glass plate, an interlayer film surrounding the periphery of the functional film, and a shielding layer that partially overlaps with the functional film in a planar view, and in a planar view of the second glass plate, at least a portion of the periphery of the functional film is visible without being covered by the shielding layer.

[0007] The vehicle window unit according to the present disclosure comprises the laminated glass according to any one of claims 1 to 18, and a frame body provided on the peripheral edge of the laminated glass and attached to a vehicle, and a portion of the outer periphery of the functional film that is not covered by the shielding layer and is visible is covered by the frame body or the interior of the vehicle.

[0008] According to the present invention, it is possible to check whether or not bubbles have occurred on the periphery of a functional film.

[0009] FIG. 1 is a schematic diagram of a vehicle window unit according to a first embodiment. FIG. 2 is a schematic cross-sectional view of a laminated glass. FIG. 3 is a schematic cross-sectional view showing an example of a functional film. FIG. 4 is a schematic cross-sectional view of a functional film in a plan view. FIG. 5 is a schematic diagram for explaining the position of an opening region. FIG. 6 is a diagram explaining a region covered by an interior material in a laminated glass. FIG. 7 is a schematic diagram showing an example of the formation of an opening region. FIG. 8 is an enlarged plan view showing an example of an opening region. FIG. 9 is a schematic diagram of a laminated glass 10 according to a second embodiment. FIG. 10 is an enlarged plan view showing an opening region according to the second embodiment. FIG. 11 is a schematic diagram showing an annular opening region. FIG. 12 is a schematic diagram showing an opening region consisting of a hole. FIG. 13 is a schematic diagram showing an opening region consisting of a notch.

[0010] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Note that the present invention is not limited to these embodiments, and when there are multiple embodiments, the present invention also includes configurations that are made by combining the respective embodiments. Furthermore, numerical values ​​include the range of rounding.

[0011] (First embodiment) Fig. 1 is a schematic diagram of a vehicle window unit according to a first embodiment. The vehicle window unit 1 according to the first embodiment shown in Fig. 1 is a glass plate with a resin frame that is attached to a vehicle. The vehicle window unit 1 is configured as a Module Assy Window (MAW) (registered trademark) that includes laminated glass 10 and a frame 20 that is provided on the periphery of the laminated glass 10 and attached to the vehicle. The vehicle window unit 1 can be attached to the window frame of the vehicle together with the frame 20, which simplifies the vehicle assembly process.

[0012] (Vehicle Window Unit) The vehicle window unit 1 can be applied to, for example, a roof glass, rear glass, side glass, quarter glass, extra glass, windshield, etc. of a vehicle. The extra glass is glass attached to the rear side of the vehicle below the rear glass to improve the rearward visibility of the driver. The vehicle here is typically an automobile, but refers to any moving body having glass, including trains, ships, aircraft, etc. However, the application of the laminated glass 10 is not limited to vehicles. Figure 1 illustrates a vehicle window unit 1 constituting a rear quarter glass.

[0013] 1 is a schematic diagram showing a vehicle window unit 1 viewed from inside the vehicle cabin toward the outside of the vehicle cabin. In FIG. 1, the laminated glass 10 of the vehicle window unit 1 is shown as a flat plate, but is not limited thereto and may be a curved shape that is curved in one direction or in two or more directions.

[0014] 1, the planar shape of the laminated glass 10 is generally triangular, but the planar shape of the laminated glass 10 is not limited to a triangular shape and may be, for example, a quadrangular shape such as a rectangle or a trapezoid, or any other shape. The planar shape here refers to the shape of a predetermined area of ​​the laminated glass 10 when viewed from the normal direction of the surface of the laminated glass 10 facing the interior of the vehicle.

[0015] The frame body 20 is formed on the peripheral edge of the laminated glass 10. The frame body 20 may be provided continuously in an annular shape around the entire circumference of the laminated glass 10 as shown in FIG. 1 , or may be formed only on a portion of the outer periphery of the laminated glass 10 and be discontinuous in the circumferential direction. The frame body 20 may be provided in contact with an end face of the laminated glass 10 and one of the two main surfaces (the vehicle interior surface and / or the vehicle exterior surface). For example, the frame body 20 may be provided only on the vehicle interior surface of the laminated glass 10, or only on the end face. The frame body 20 may be provided only on the vehicle interior surface and end face of the laminated glass 10, or only on the vehicle exterior surface and end face. The frame body 20 may be provided only on the vehicle interior surface, the vehicle exterior surface, and end face of the laminated glass 10.

[0016] The frame 20 is made of, for example, a resin. The resin used for the frame 20 is not particularly limited as long as it can form a product integrated with the laminated glass 10. However, it is preferable that the resin be usable for injection molding, i.e., be heat-meltable and subsequently solidified by cooling. The resin used for the frame 20 may be a thermoplastic resin. The resin used for the frame 20 includes, for example, at least one of a thermoplastic elastomer (TPE) material, a polyvinyl chloride (PVC) material, an ethylene propylene rubber (EPDM), and a thermoplastic vulcanizate (TPV) material. The thermoplastic elastomer (TPE) material includes an olefin-based thermoplastic elastomer (TPO).

[0017] The frame 20 may be provided with a decorative member. The decorative member is an exterior member (or an interior member) primarily intended to decorate the vehicle window. The frame 20 may also be provided with a control unit that electrically controls the functional film 15 described below. The control unit may be adhered to the surface of the frame 20 or may be at least partially embedded therein.

[0018] (Laminated Glass) FIG. 2 is a schematic cross-sectional view of a laminated glass. As shown in FIG. 2, the laminated glass 10 includes a first glass sheet 11, a second glass sheet 12, an interlayer film 13, a shielding layer 14, and a functional film 15. The direction from the interior to the exterior of the vehicle is defined as direction Z. The laminated glass 10 is stacked in the following order in direction Z: the shielding layer 14 (14A), the second glass sheet 12, the interlayer film 13 and the functional film 15, the shielding layer 14 (14B), and the first glass sheet 11. That is, when installed in a vehicle, the first glass sheet faces the exterior of the vehicle, and the second glass sheet faces the interior of the vehicle. Direction Z can also be referred to as the stacking direction. Hereinafter, the term "planar view of the second glass sheet 12" refers to viewing the laminated glass 10 in the direction from the second glass sheet 12 to the first glass sheet 11, i.e., viewing the laminated glass 10 in direction Z. When we say "planar view of the first glass sheet 11," we mean viewing the laminated glass 10 in the direction from the first glass sheet 11 toward the second glass sheet 12, that is, viewing the laminated glass 10 in the direction opposite to direction Z.

[0019] The total thickness T0 of the laminated glass 10 is preferably 2.8 mm or more and 10 mm or less. 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 10 mm or less, sufficient transmittance can be ensured without the weight becoming too large. Note that the total thickness here and the thickness described hereinafter refer to the length in the Z direction.

[0020] (Glass Plates) The first glass plate 11 and the second glass plate 12 are glass plates whose main surfaces face each other. The interlayer 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 together with the interlayer film 13 and the functional film 15 sandwiched therebetween.

[0021] The first glass sheet 11 constitutes one surface of the laminated glass 10. In other words, the first glass sheet 11 is an exterior glass sheet that faces the exterior side of the vehicle when the laminated glass 10 is installed in the vehicle. The second glass sheet 12 constitutes the other surface of the laminated glass 10. In other words, the second glass sheet 12 is an interior glass sheet that faces the interior side of the vehicle when the laminated glass 10 is installed in the vehicle. The first glass sheet 11 and the second glass sheet 12 may be flat or curved in one or more directions. Hereinafter, the Z-direction surface of the first glass sheet 11 will be referred to as the first surface, and the surface opposite the first surface will be referred to as the second surface. The Z-direction surface of the second glass sheet 12 will be referred to as the third surface, and the surface opposite the third surface will be referred to as the fourth surface. The first surface faces the exterior side of the vehicle, and the fourth surface faces the interior side of the vehicle.

[0022] The first glass sheet 11 and the second glass sheet 12 may be inorganic glass or organic glass. Examples of inorganic glass that can be used include, without particular limitation, soda-lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, and quartz glass. The first glass sheet 11 is preferably inorganic glass from the viewpoint of scratch resistance, and is preferably soda-lime glass from the viewpoint of formability. When the first glass sheet 11 and the second glass sheet 12 are soda-lime glass, clear glass, green glass and UV-cut green glass containing a predetermined amount or more of iron, privacy glass, and the like can be used.

[0023] The inorganic glass may be either untempered glass or tempered glass. Untempered glass is produced by forming molten glass into a plate shape and slowly cooling it. Tempered glass is produced by forming a compressive stress layer on the surface of untempered glass.

[0024] The tempered glass may be either physically tempered glass such as air-cooled tempered glass or chemically tempered glass. In the case of physically tempered glass, the glass surface can be tempered by generating a compressive stress layer on the glass surface due to the temperature difference between the glass surface and the interior of the glass by an operation other than gradual cooling, such as rapidly cooling a glass sheet uniformly heated during bending from a temperature near its softening point.

[0025] In the case of chemically strengthened glass, for example, after bending, the glass surface can be strengthened by generating compressive stress on the glass surface by an ion exchange method, etc. Glass that absorbs ultraviolet or infrared rays may also be used. Furthermore, although transparent glass is preferable, a glass plate that is colored to the extent that transparency is not impaired may also be used.

[0026] On the other hand, examples of materials for organic glass include transparent resins such as polycarbonate, acrylic resins such as polymethyl methacrylate, polyvinyl chloride, and polystyrene.

[0027] The first glass sheet 11 and the second glass sheet 12 may be processed into various shapes and curvatures. The forming method for the first glass sheet 11 and the second glass sheet 12 is not particularly limited. For example, in the case of inorganic glass, glass sheets formed by a float process or the like are preferred. When the first glass sheet 11 and the second glass sheet 12 are curved inorganic glass, the first glass sheet 11 and the second glass sheet 12 are bent after being formed by the float process and before being bonded with the interlayer film 13. The bending is performed by softening the glass by heating. The heating temperature of the glass during bending is approximately 550°C or higher and 700°C or lower. Gravity forming, press forming, roller forming, or the like is used to bend the first glass sheet 11 and the second glass sheet 12 into a predetermined curved shape.

[0028] The thickness T1 of the first glass sheet 11 is not particularly limited, but is generally in the range of 0.1 mm to 10 mm, and can be appropriately selected depending on the type and location of the vehicle to which the laminated glass 10 is applied. When the thickness T1 of the first glass sheet 11 is 0.3 mm or more, impact resistance is appropriately maintained and strength such as resistance to flying stones is sufficient; a thickness T1 of 0.5 mm or more is more preferable, 0.7 mm or more is even more preferable, 1.1 mm or more is particularly preferable, and 1.6 mm or more is most preferable.

[0029] Furthermore, the thickness T1 of the first glass sheet 11 being 4 mm or less is preferable in terms of vehicle fuel efficiency because the mass of the laminated glass 10 does not become too large. The thickness T1 of the first glass sheet 11 is more preferably 3.5 mm or less, even more preferably 2.6 mm or less, even more preferably 2.2 mm or less, and particularly preferably 2.1 mm or less. Note that the thickness T1 here is preferably the thickness of the thinnest portion of the first glass sheet 11.

[0030] The first glass sheet 11 preferably has sufficient impact resistance for use in a vehicle. The impact resistance can be evaluated, for example, using an impact resistance test according to UN R43. The impact resistance test is a test to determine whether a safety glass, such as laminated glass for an automobile, has the necessary adhesiveness or strength to withstand the impact of a small, hard flying object. Specifically, the test is performed by maintaining the laminated glass (safety glass) at a predetermined temperature, placing the first glass sheet 11 on a support frame with the exterior surface of the vehicle facing up, and then gravity-dropping a steel ball from a predetermined height onto the laminated glass.

[0031] The same can be said about the thickness T2 of the second glass plate 12 as about the thickness T1 of the first glass plate 11. The first glass plate 11 may have a different composition and / or a different thickness from the second glass plate 12. For example, the second glass plate 12 may be thinner than the first glass plate 11.

[0032] When the thickness T2 of the second glass plate 12 is 1.1 mm or less, from the viewpoint of strength, the second glass plate 12 is preferably chemically strengthened glass.

[0033] 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 properties and UV- or IR-blocking properties, a coating that has low reflectivity, low radiation properties, antifouling properties, or a coating that has condensation prevention 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 blocks UV and IR-blocking properties, has low radiation properties, absorbs visible light, is colored, or the like. Furthermore, a low-radiation coating may be formed on the fourth surface of the second glass plate 12.

[0034] That is, at least one of the first glass plate 11 and the second glass plate 12 may have one or more of a water-repellent layer, an ultraviolet blocking layer, an infrared reflective layer, a low reflectance layer, a low emissivity layer, a condensation prevention layer, a visible light absorbing layer, and a colored layer.

[0035] (Interlayer Film) The interlayer film 13 is disposed between the first glass plate 11 and the second glass plate 12. The interlayer film 13 preferably surrounds the outer periphery 15A of the functional film 15. In the example of Fig. 2, the interlayer film 13 includes an interlayer film 13A bonded to the first glass plate 11, an interlayer film 13B bonded to the second glass plate 12, and a frame-shaped interlayer film 13C positioned between the interlayer films 13A and 13B and surrounding the outer periphery 15A of the functional film 15. In this example, the interlayer film 13C surrounds the outer periphery 15A of the functional film 15, but the interlayer film 13C need not be provided. Even when interlayer film 13C is not provided, if the periphery of functional film 15 is located inside the periphery of first glass sheet 11 or second glass sheet 12, at least one of interlayer film 13A and interlayer film 13B will deform during pressure bonding in the manufacturing process of laminated glass 10, thereby surrounding periphery 15A of functional film 15. If functional film 15 is thick, the difference in thickness between the portion with functional film 15 and the portion on the periphery of functional film 15 will be large, and therefore it is preferable to provide interlayer film 13C to fill the thickness difference.

[0036] In the first embodiment, the interlayer films 13A, 13B, and 13C are each separate and are joined together during the production of the laminated glass 10. However, this is not limited to this. For example, the interlayer film 13 may be formed as a single unit in cases where a highly fluid material is poured between the first glass sheet 11 and the second glass sheet 12 to form the interlayer film 13.

[0037] Thermoplastic resins are often used for the interlayer film 13, and examples thereof include thermoplastic resins that have conventionally been used for this type of application, 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, and ionomer resins. Furthermore, resin compositions containing modified hydrogenated block copolymers, as described in Japanese Patent No. 6,065,221, can also be suitably used.

[0038] Among these, plasticized polyvinyl acetal resins are preferably used as the material for the interlayer film 13 because they have an excellent balance of properties such as transparency, weather resistance, strength, adhesive strength, penetration resistance, impact energy absorption, moisture resistance, heat insulation, and sound insulation. These thermoplastic resins may be used alone or in combination of two or more. The term "plasticized" in the plasticized polyvinyl acetal resin means that the resin has been plasticized by adding a plasticizer. The same applies to other plasticized resins.

[0039] However, when the functional film 15 is encapsulated in the interlayer 13, the encapsulated material may be deteriorated by a specific plasticizer depending on the type of material, and in such cases, it is preferable to use a resin that does not substantially contain that plasticizer. In other words, it may be preferable that the interlayer 13 does not contain a plasticizer. Examples of resins that do not contain plasticizers include ethylene-vinyl acetate copolymer resins.

[0040] Examples of the polyvinyl acetal resin include polyvinyl formal resin obtained by reacting polyvinyl alcohol (hereinafter sometimes referred to as "PVA" as needed) with formaldehyde, polyvinyl acetal resin in the narrow sense obtained by reacting PVA with acetaldehyde, and polyvinyl butyral resin (hereinafter sometimes referred to as "PVB" as needed) obtained by reacting PVA with n-butylaldehyde. PVB is particularly preferred because of its excellent balance of properties such as transparency, weather resistance, strength, adhesive strength, penetration resistance, impact energy absorbency, moisture resistance, heat insulation, and sound insulation. These polyvinyl acetal resins may be used alone or in combination of two or more.

[0041] The intermediate film 13 may be a curable transparent resin also known as Optical Clear Resin (OCR) or a transparent adhesive sheet also known as Optical Clear Adhesive (OCA). The use of a curable transparent resin or a transparent adhesive sheet makes it possible to fabricate a laminate at room temperature, which is more desirable. Resins such as acrylic, silicone, urethane acrylate, and epoxy resins are used as the curable transparent resin or transparent adhesive sheet. These curable transparent resins and transparent adhesive sheets may be used alone or in combination of two or more types.

[0042] The material forming the interlayer 13 is not limited to thermoplastic resin. The interlayer 13 may also contain functional particles such as an infrared absorbing agent, an ultraviolet absorbing agent, or a luminescent agent. The interlayer 13 may also have a colored portion called a shade band.

[0043] The thickness of the interlayer film 13 is preferably 0.3 mm or more at its thinnest part. If the thickness of the interlayer film 13 at its thinnest part is 0.3 mm or more, the impact resistance required for the laminated glass 10 will be sufficient. The thickness of the interlayer film 13 is preferably 3 mm or less at its thickest part. If the maximum thickness of the interlayer film 13 is 3 mm or less, the mass of the laminated glass 10 will not become too large. The maximum thickness of the interlayer film 13 is more preferably 2.8 mm or less, and even more preferably 2.6 mm or less.

[0044] The thickness of the interlayer film 13 refers to the thickness of the interlayer film 13 alone, excluding the thickness of the functional film 15. Therefore, the thickness of the interlayer film 13 refers to the length obtained by subtracting the thickness T4 of the functional film 15 from the thickness T3 from the interface (second surface) of the interlayer film 13A with the first glass plate 11 to the interface (third surface) of the interlayer film 13B with the second glass plate 12.

[0045] Furthermore, the thickest part of the interlayer film 13 refers to, for example, a part that does not sandwich the functional film 15 (a part that does not overlap with the functional film 15 in a planar view), and therefore the thickness of the thickest part of the interlayer film 13 is thickness T3 because there is no functional film 15. On the other hand, the thinnest part of the interlayer film 13 refers to, for example, a part that sandwiches the functional film 15 (a part that overlaps with the functional film 15 in a planar view), and therefore the thickness of the thinnest part of the interlayer film 13 is thickness T3 minus thickness T4 of the functional film 15 (see FIG. 3 ).

[0046] Although it is desirable that the intermediate films 13A, 13B, and 13C included in the intermediate film 13 are all formed of the same material, some or all of the intermediate films 13A, 13B, and 13C may be formed of different materials. For example, the intermediate films 13A and 13B may be formed of the same material, and the intermediate film 13C may be formed of a different material.

[0047] To produce the interlayer film 13, for example, an appropriate resin material for the interlayer film is selected from the above-mentioned materials and extruded in a heated, molten state using an extruder. The extrusion conditions, such as the extrusion speed, of the extruder are set to be uniform. The extruded resin film is then stretched as necessary to impart a curvature to the design of the laminated glass 10, thereby completing the interlayer film 13.

[0048] (Shielding Layer) 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 may be a colored interlayer or film with light-shielding properties, or a combination of a colored interlayer and a colored ceramic layer. The colored film may be integrated with an infrared reflective film or the like. Here, "opaque" means that the visible light transmittance is at least 5% or less, preferably 3% or less, more preferably 1% or less, and may even be substantially 0%. The shielding layer 14 prevents ultraviolet degradation of resins such as urethane that hold the laminated glass 10 to the vehicle body.

[0049] The shielding layer 14 can be formed, for example, by applying a ceramic color paste containing a fusible glass frit containing a black pigment onto a glass plate by screen printing or the like, and then firing the paste, but is not limited to this. The shielding layer 14 may also be formed, for example, by applying an organic ink containing a black or dark color pigment onto a glass plate by screen printing or the like, and then drying the ink.

[0050] 2 , 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 in a direction closer to the second glass plate 12 than the functional film 15. That is, the inner surface shielding layer 14A can be disposed on a main surface of the second glass plate 12 or between the functional film 15 and the second glass plate 12. In the example of FIG. 2 , the inner surface shielding layer 14A is disposed on a main surface of the second glass plate 12, more specifically, on a main surface (fourth surface) of the second glass plate 12 that is located in the opposite direction from the functional film 15.

[0051] The outer shielding layer 14B is disposed in a direction (Z direction) closer to the first glass plate 11 than the functional film 15. That is, the outer shielding layer 14B can be disposed on the main surface of the first glass plate 11 or between the functional film 15 and the first glass plate 11. In the example of Fig. 2, the outer shielding layer 14B is disposed on the main surface of the first glass plate 11, more specifically, on the main surface (second surface) of the first glass plate 11 that faces the functional film 15. In other words, the outer shielding layer 14B is disposed at the interface between the first glass plate 11 and the interlayer film 13A.

[0052] These shielding layers 14 are not limited to the example shown in Fig. 2, and may be provided on the surfaces of the intermediate films 13A, 13B, or may be embedded inside the intermediate films 13A, 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 may have an inner surface shielding layer but not an outer surface shielding layer, or may have an outer surface shielding layer but not an inner surface shielding layer.

[0053] The shielding layer 14 is provided, for example, in a strip shape along the peripheral edge of the laminated glass 10. The shielding layer 14 partially overlaps with the functional film 15 in a plan view. The shielding layer 14 that partially overlaps with the functional film 15 in a plan view preferably overlaps with the peripheral edge of the functional film 15. The shielding layer 14 is preferably provided in a strip shape along the entire periphery of the peripheral edge of the laminated glass 10.

[0054] In the example of FIG. 1 , the inner surface shielding layer 14A and the outer surface shielding layer 14B are formed in a band shape along the outer periphery 15A of the functional film 15 in a plan view of the second glass plate 12. In a plan view of the second glass plate 12, the inner peripheral edges of the inner surface shielding layer 14A and the outer surface shielding layer 14B are positioned closer to the center of the laminated glass 10 than the outer periphery 15A of the functional film 15, and the outer peripheral edges of the inner surface shielding layer 14A and the outer surface shielding layer 14B are positioned outward from the outer periphery 15A of the functional film 15. Therefore, in a plan 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 an opening region 40 described below. Note that although FIG. 1 shows the inner surface shielding layer 14A, the planar shape of the outer surface shielding layer 14B is the same as that of the inner surface shielding layer 14A. However, for example, the inner peripheral edge of the outer shielding layer 14B may be positioned closer to the center than the inner peripheral edge of the inner shielding layer 14A.

[0055] The outer periphery 15A of the functional film 15 is susceptible to the influence of the external environment and the intermediate film 13C (e.g., moisture), and is more susceptible to deterioration than areas closer to the center. Covering the outer periphery 15A of the functional film 15 with the opaque shielding layer 14 makes it less likely that deterioration of the functional film 15 due to ultraviolet rays near the outer periphery 15A of the functional film 15 will be accelerated. Furthermore, even if deterioration does occur in the functional film 15, the deteriorated portion can be made invisible. Suppression of deterioration near the outer periphery A of the functional film 15 is particularly significant when the functional film 15 is a light-control film. Furthermore, by providing the inner shielding layer 14A and the outer shielding layer 14B, the electrodes and electrode lead wiring electrically connected to the functional film 15 can be concealed so that they are difficult to see from both inside and outside the vehicle.

[0056] (Functional Film) The functional film 15 is a component that imparts additional functions to the laminated glass 10. Examples of the functional film 15 include a light-controlling film, an electric heating film, a light-emitting display film, and a solar cell film. The light-controlling film is a film that can adjust the transmittance of visible light in response to an input. The electric heating film is a film that generates heat when electricity is applied. The light-emitting display film is a film configured by arranging pixels made of light-emitting elements, and can display an image by applying electricity to each pixel. The light-emitting elements include organic or inorganic electroluminescent (EL) elements. The solar cell film is a solar cell that converts light energy into electricity, formed into a film. Figure 3 is a schematic cross-sectional view showing an example of a functional film. In the example of Figure 3, the functional film 15 is a light-controlling film. The light transmittance of the laminated glass 10 can be switched by the light-controlling film.

[0057] 3, functional film 15, which is a light-controlling film, has a transparent substrate 16A, a transparent conductive film 17A, a light-controlling layer 18, a transparent conductive film 17B, and a transparent substrate 16B. In functional film 15, transparent substrate 16B, transparent conductive film 17B, light-controlling layer 18, transparent conductive film 17A, and transparent substrate 16A are laminated in this order in the Z direction.

[0058] Hereinafter, when there is no need to distinguish between the transparent substrate 16A and the transparent substrate 16B, they will be referred to as substrate 16, and when there is no need to distinguish between the transparent conductive film 17A and the transparent conductive film 17B, they will be referred to as conductive film 17. Electrodes are connected to the functional film 15. The electrodes include an electrode 30A connected to the transparent conductive film 17A and an electrode 30B connected to the transparent conductive film 17B. Wiring 31A and 31B are connected to the electrodes 30A and 30B connected to the functional film 15 for connecting the electrodes to a control unit 32. When there is no need to distinguish between the electrode 30A and the electrode 30B, they will be referred to as electrode 30, and when there is no need to distinguish between the wiring 31A and the wiring 31B, they will be referred to as wiring 31.

[0059] The thickness T4 of the functional film 15 is, for example, 0.05 mm or more and 1.2 mm or less. When the thickness T4 of the functional film 15 is large, bubbles are likely to form around the periphery of the functional film 15, so a configuration that allows for confirmation of the presence or absence of bubbles around the periphery of the functional film 15 is particularly useful. The effects of the present invention are 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. If the thickness of the functional film 15 is too large, there is a risk that the glass plate will break when forming the laminated glass or when forming a frame around the periphery of the laminated glass. Therefore, the thickness T4 is preferably 1.0 mm or less, and more preferably 0.8 mm or less.

[0060] (Transparent Substrate) The transparent substrate 16A and the transparent substrate 16B are a pair of substrates that support the transparent conductive films 17A and 17B and sandwich the switchable layer 18. The transparent substrate 16A is located in the Z direction relative to the switchable layer 18, and the transparent substrate 16B is located in the opposite direction to the Z direction relative to the switchable layer 18.

[0061] The substrate 16 is preferably a transparent resin layer and preferably contains one or more materials selected from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polyamide, polyether, polysulfone polyethersulfone, polycarbonate, polystyrene, cyclic polyolefin, polyarylate, polyetherimide, polyetheretherketone, polyimide, aramid, polybutylene terephthalate, triacetyl cellulose, polyurethane, and cycloolefin polymer.

[0062] The transparent base material 16A and the transparent base material 16B are made of the same material as described above, but are not limited to this and may be made of different materials.

[0063] The thickness T5 of the substrate 16 is, for example, 5 μm or more and 500 μm or less, preferably 10 μm or more and 200 μm or less, and more preferably 50 μm or more and 150 μm or less. A thickness T5 of 5 μm suitably suppresses a decrease in the impact resistance of the laminated glass 10, and a thickness T5 of 500 μm or less prevents the mass of the laminated glass 10 from becoming too large. Note that although the transparent substrates 16A and 16B have the same thickness T5, they may have different thicknesses.

[0064] (Conductive Film) The transparent conductive film 17A is formed on the surface of the transparent substrate 16A facing away from the Z direction, and is in contact with the surface of the light-controlling layer 18 facing away from the Z direction. The transparent conductive film 17B is formed on the surface of the transparent substrate 16B facing away from the Z direction, and is in contact with the surface of the light-controlling layer 18 facing away from the Z direction. The transparent conductive film 17A and the transparent conductive film 17B are a pair of conductive films sandwiching the light-controlling layer 18. The transparent conductive film 17A and the transparent conductive film 17B are connected to a control unit 32 (see FIG. 3 ) via wiring 31, and a voltage is applied from the control unit 32. The transparent conductive film 17A and the transparent conductive film 17B can be formed over the entire surfaces of the transparent substrate 16A and the transparent substrate 16B, respectively.

[0065] The conductive film 17 may be made of, for example, a transparent conductive oxide (TCO), such as, but not limited to, tin-doped indium oxide (ITO), aluminum-doped zinc oxide (AZO), or indium-doped cadmium oxide.

[0066] Transparent conductive polymers such as poly(3,4-ethylenedioxythiophene) (PEDOT) or poly(4,4-dioctylcyclopentadithiophene) can also be suitably used as the conductive film 17. Furthermore, a laminated film of a metal phase and a dielectric layer, silver nanowires, a metal mesh of silver or copper, or the like can also be suitably used as the conductive film 17.

[0067] The conductive film 17 can be formed by using a physical vapor deposition (PVD) method such as a sputtering method, a vacuum deposition method, an ion plating method, etc. The conductive film 17 may also be formed by a chemical vapor deposition method or a wet coating method.

[0068] (Light Control Layer) As shown in FIG. 3 , the light control layer 18 is a layer capable of changing the amount of light transmission. The light control layer 18 is provided between the transparent conductive film 17A and the transparent conductive film 17B. The light control layer 18 may include a sealant (not shown) that seals the side surfaces of the light control layer 18. The light control layer 18 may be made of, for example, one or more materials selected from the group consisting of a suspended particle device (SPD), a guest-host liquid crystal (GHLC), an electrochromic (EC), a polymer dispersed liquid crystal (PDLC), and a polymer network liquid crystal (PNLC). For example, if the light-controlling layer 18 does not contain liquid crystal or the like and does not require a sealant, the sealant need not be provided. In this case, the outer peripheral edge of the light-controlling layer 18 becomes the edge of the light-controlling layer 18.

[0069] A typical SPD film can be used as a suspended particle device. The SPD film is constructed 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 in the Y direction. When a voltage is applied between the two surfaces of such an SPD film, the suspended particles in the polymer layer become oriented, resulting in a high visible light transmittance and high transparency. When no voltage is applied, the suspended particles in the polymer layer do not become oriented, resulting in a low visible light transmittance and low transparency.

[0070] As the SPD film, for example, a commercially available product such as LCF-1103DHA (trade name, manufactured by Hitachi Chemical Co., Ltd.) can be used. Note that such commercially available products are supplied in a predetermined size, and are used after being cut to the desired size. Note that the thickness of the SPD film is not particularly limited, but is preferably 0.1 mm or more and 0.4 mm or less from the viewpoints of ease of handling and availability.

[0071] (Electrodes) The electrodes 30 are connected to the conductive film 17 and apply a voltage from an external device (controller 32, see FIG. 3 ) to the conductive film 17. In the example of FIG. 1 , each electrode 30 is located at the bottom of the laminated glass 10, but the electrodes 30 may be located at any position, and may be, for example, concentrated at the top in a plan view. The electrode 30A is one of the positive and negative electrodes and is connected to the controller 32 via wiring 31A. The electrode 30B is the other of the positive and negative electrodes and is connected to the controller 32 via wiring 31B. When a voltage is supplied to the switchable layer 18 from the controller 32 via the electrodes 30A and 30B, the light transmittance of the switchable layer 18 changes depending on the voltage.

[0072] The material of the electrodes 30A and 30B is not particularly limited as long as it is a conductive material, and examples thereof include metal materials. Examples of metal materials include gold, silver, copper, aluminum, tungsten, platinum, palladium, nickel, cobalt, titanium, iridium, zinc, magnesium, and tin. These metals may be plated, or may be alloys or composites with resin.

[0073] From the viewpoints of cost and availability, ribbon, flat-braided copper wire, or flexible printed circuit (FPC) can be suitably used for the electrode 30. The ribbon or flat-braided copper wire may be plated with a metal other than the above. The electrode 30 may be formed integrally with the wiring 31.

[0074] The electrodes 30 can be bonded to the corresponding conductive films 17 by any of a conductive adhesive material (conductive adhesive layer), an anisotropic conductive film, or solder. Alternatively, the electrodes 30 may be in direct contact with the conductive films 17 without using a conductive adhesive material, an anisotropic conductive film, or solder. Alternatively, the electrodes 30 may be formed by a printing method such as screen printing, inkjet printing, offset printing, flexographic printing, or gravure printing.

[0075] The electrode 30 has a length and shape that are necessary and sufficient for passing current through the light-controlling layer 18. The shape of the electrode 30 is not particularly limited, but is generally a substantially rectangular shape.

[0076] In plan view, the electrode 30 is preferably disposed 5 mm or more inward, and more preferably 8 mm or more inward, from the peripheral edges (edges) of the first glass sheet 11 and the second glass sheet 12. Such a positioning reduces the risk of moisture entering from the peripheral edges of the first glass sheet 11 and the second glass sheet 12, causing corrosion of the electrode 30 or a short circuit between different potentials.

[0077] There is no particular limitation on the length of the electrode 30, but it is preferably 5 mm or more in order to ensure sufficient current-carrying function and improve workability.

[0078] The thickness of the electrode 30 is preferably 0.05 mm to 0.4 mm. By making the thickness of the electrode 30 0.05 mm or more, sufficient strength can be obtained, thereby suppressing the occurrence of defects such as disconnection. Furthermore, by making the thickness of the electrode 30 0.4 mm or less, the thickness deviation between the electrode 30 and other parts is reduced. This makes it possible to suppress stress generated in the first glass sheet 11 and the second glass sheet 12, and reduces the risk of the first glass sheet 11 and the second glass sheet 12 breaking.

[0079] The electrode 30 is formed on a part of the outer periphery of the functional film 15. The wiring 31 is connected to the electrode 30 at one end and to the control unit 32 at the other end.

[0080] Although shown schematically in FIG. 3 , the wirings 31A and 31B are integrated into a single member using an FPC or the like and are drawn from the electrodes 30A and 30B arranged on the outer periphery 15A of the functional film 15 to the side edge surfaces of the laminated glass 10. In the example of FIG. 2 , the drawn wirings 31A and 31B are bent along the side edge surfaces of the laminated glass 10 and drawn onto the main surface (fourth surface) of the second glass sheet 12. The wirings 31A and 31B are connected to terminal portions 33 provided on the shielding layer 14 (inner surface shielding layer 14A). The terminal portions 33 are connected to a wire harness that is connected to a vehicle control unit 32, and the terminal portions 33 connect the wirings 31A and 31B of the functional film 15 to the control unit 32. The terminal portions 33 cover the connection portions between the wirings 31A and 31B and the wire harness with a resin material.

[0081] 2, the functional film 15 is formed to be slightly smaller than the planar shape of the laminated glass 10 (first glass sheet 11, second glass sheet 12) by the size of the interlayer film 13C. The outer periphery 15A of the functional film 15 is offset toward the center from the outer periphery of the laminated glass 10 (first glass sheet 11, second glass sheet 12).

[0082] FIG. 4 is a schematic cross-sectional view of the functional film 15 as seen from above. As shown in FIG. 4 , the functional film 15 is surrounded by the interlayer 13 (interlayer 13C). Taking dimensional tolerances into consideration, a minute gap is designed between the outer periphery 15A of the functional film 15 and the inner periphery of the interlayer 13. However, this minute gap is filled by the interlayer 13 being compressed and deformed in the thickness direction during pressure bonding in the manufacturing process of the laminated glass 10, so that the outer periphery 15A of the functional film 15 and the inner periphery of the interlayer 13 are in close contact with each other. However, due to variations in degassing during the manufacturing process or unintended intrusion of air from the outside during the manufacturing process, minute air bubbles may remain between the outer periphery 15A of the functional film 15 and the inner periphery of the interlayer 13.

[0083] Therefore, there is a need to check for remaining air bubbles in a predetermined location on the outer periphery 15A of the functional film 15 that is set as a location that requires checking during the inspection process after the laminated glass 10 is manufactured.

[0084] Therefore, in the first embodiment, in a plan view 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 is therefore visible. Specifically, the inner-surface shielding layer 14A is provided with a structure for visually viewing the outer periphery 15A of the functional film 15. As shown in FIGS. 1 and 2 , the inner-surface shielding layer 14A has an opening region 40 at a position overlapping a portion of the outer periphery 15A of the functional film 15 in a plan view of the second glass plate 12. In FIGS. 1 and 2 , the opening region 40 is a hole (opening) partially formed between the inner peripheral edge and the outer peripheral edge of the inner-surface shielding layer 14A. The opening region 40 may be formed in the outer-surface shielding layer 14B instead of the inner-surface shielding layer 14A, or may be formed in both the inner-surface shielding layer 14A and the outer-surface shielding layer 14B.

[0085] The opening region 40 is a region that is capable of transmitting visible light. The opening region 40 may be a space portion where a part of the inner-surface shielding layer 14A has been removed, or a light-transmitting member may be disposed in that space portion. As a result, in a plan 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.

[0086] (Position of Formation of Opening Region) Next, a description will be given of the position of formation of opening region 40. Opening region 40 may be formed so as to overlap the entire outer periphery 15A of functional film 15, but it is preferable to form it so as to overlap partially with a predetermined portion of outer periphery 15A of functional film 15.

[0087] 5 is a schematic diagram illustrating the formation position of the opening region 40. Fig. 5 shows an enlarged view of a portion of the outer periphery 15A of the functional film 15 and a portion of the outer periphery of the glass plates (first glass plate 11, second glass plate 12) in a plan view of the second glass plate 12. For ease of explanation, the curved shape of the outer periphery of the glass plate is emphasized (the curvature is increased).

[0088] The predetermined portion of the outer periphery 15A of the functional film 15 that overlaps with the opening region 40 preferably 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 in plan view, and more preferably 13 mm or more. Here, the minimum distance D refers to the minimum distance between a point of interest on the outer periphery 15A of the functional film 15 and each point on the outer periphery of the glass plate (the first glass plate 11 or the second glass plate 12). In other words, the minimum distance D is defined for each point of interest. Note that if the outer peripheries of the first glass plate 11 and the second glass plate 12 have different shapes, the minimum distance D may be the smaller of the values ​​calculated based on the outer periphery of the first glass plate 11 and the outer periphery of the second glass plate 12.

[0089] In FIG. 5, the minimum distance D at the position P1 on the outer periphery 15A is D １ , the minimum distance D at position P2 is D ２ , the minimum distance D at position P3 is D ３ Position P3 is a position between positions P1 and P2. In FIG. 5, the minimum distance D (D ３ ) is 13 mm or more. In this case, an opening region 40 (dashed line portion) is formed including the position P3 and extending from the position P1 to the position P2. １ and D ２ and 13 mm or more, but at least one of them may be less than 13 mm. UN R43 requires that no bubbles be present in an area more than 15 mm from the glass outer diameter after a specified test, while the U.S. Federal Motor Vehicle Safety Standards (FMVSS) specify a limit of 13 mm. This makes it possible to check for the occurrence of bubbles in areas requiring inspection, even when a shielding layer 14 is provided before the inspection process.

[0090] The minimum distance D is often large in areas where the outer shape of the glass plate and the outer shape of the functional film 15 differ. In FIG. 5 , the glass plate (at least one of the first glass plate 11 and the second glass plate 12) includes a curved portion CV that convexly extends outward on the glass periphery in a planar view. In contrast, the functional film 15 includes a straight portion SL on the outer periphery that faces the curved portion CV in a planar view. When the convex curved portion CV faces the straight portion SL in a planar view, the distance between the outer periphery 15A of the functional film 15 and the functional film 15 increases near the apex of the convex curved portion CV. In other words, the minimum distance D is likely to exceed 13 mm. Therefore, the predetermined portion of the outer periphery 15A of the functional film 15 that overlaps with the opening region 40 may be the straight portion SL. As a result, in a planar view 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 visible without being covered by the shielding layer 14. The straight line portion SL can be formed at any position on the outer periphery 15A of the functional film 15 depending on the design of the laminated glass 10.

[0091] Furthermore, a predetermined portion of the outer periphery 15A of the functional film 15 that overlaps with the opening region 40 may be the location where the electrode 30 is formed. That is, in a plan view of the second glass plate 12, at least the portion of the outer periphery 15A of the functional film 15 where the electrode 30 is formed is visible without being covered by the shielding layer 14. In some cases, the portion of the outer periphery 15A of the functional film 15 where the electrode 30 is formed is formed linearly for connection to an FPC or the like. Therefore, the portion where the electrode 30 is formed may also be the portion where the linear portion SL is formed. Note that the portion where the electrode 30 is formed may be other than the linear portion SL.

[0092] 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 the opening region 40) may be covered by the frame 20 or the vehicle interior material 90. That is, in the inspection process for the laminated glass 10 alone, after the presence or absence of air bubbles is confirmed through the opening region 40, the opening region 40 may be covered by another member (the frame 20 or the vehicle interior material 90) and made invisible from the outside. This allows the outer periphery 15A of the functional film 15 to be concealed after the laminated glass 10 is assembled, while remaining visible during the inspection process. When the laminated glass 10 is used as a side glass (side door glass), the opening region 40 may be covered by a door panel and made invisible from the outside.

[0093] FIG. 6 is a diagram illustrating the area of ​​the laminated glass 10 covered by the interior material 90 when the laminated glass 10 is installed in a vehicle. In the example shown in FIG. 6 , 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 material 90. In a plan view, the interior material 90 has an annular shape that surrounds the center of the laminated glass 10. The inner periphery surrounded by the interior material 90 forms the vehicle window that is visible to occupants. As shown in FIG. 6 , the interior material 90 covers the entire area extending outward from the inner periphery position 90A indicated by the dashed line in FIG. 1 .

[0094] The opening region 40 may be formed in multiple locations. FIG. 7 is a schematic diagram showing an example of the formation of the opening region 40. FIG. 7 shows another example of laminated glass 10 having an outer shape different from the triangular laminated glass 10 shown in FIGS. 1 to 6. The laminated glass 10 shown in FIG. 7 has an outer shape that is roughly a parallelogram, but the structure of the laminated glass 10 and the configuration of each component are similar to those of the examples shown in FIGS. 1 to 6. In the example of FIG. 7, opening regions 40A, 40B, 40C, 40D, and 40E are formed in the inner-surface shielding layer 14A. The opening region 40A is located where the electrode 30 is formed and is provided in a linear portion SL. The opening region 40A is provided in the upper edge portion of the laminated glass 10. The opening region 40A is formed in the shielding layer 14 (inner-surface shielding layer 14A) at the upper edge portion so as to expose a portion of the outer periphery of the functional film 15 at the upper edge portion.

[0095] The opening regions 40B and 40E are formed on the first and second sides 14A1 and 14A2 of the inner surface shielding layer 14A, which are located at both ends in the left-right direction in FIG. 7 . In the example of FIG. 7 , the inner surface shielding layer 14A includes the first side 14A1 and the second side 14A2, which is wider than the first side 14A1. In this case, the opening region 40E is preferably formed on the second side 14A2. This is because 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 be large in the wider portion of the inner surface shielding layer 14A. As shown in the example of FIG. 7 , the opening region 40B may also be formed on the narrow first side 14A1. In this way, the opening region 40E is provided on the second side 14A2, which is the other side of the laminated glass 10. The opening region 40E is formed in the shielding layer 14 (inner surface shielding layer 14A) at the second edge 14A2 so as to expose a portion of the outer periphery 15A of the functional film 15 at the other side edge. The opening region 40B is provided on the first edge 14A1, which is one side edge of the laminated glass 10. The opening region 40B is formed in the shielding layer 14 (inner surface shielding layer 14A) at the first edge 14A1 so as to expose a portion of the outer periphery of the functional film 15 at one side edge.

[0096] The opening region 40C is formed in a corner CR where adjacent sides of the inner-surface shielding layer 14A are connected. In Fig. 7, the opening region 40C is provided in a corner CR between one side edge and a bottom edge of the laminated glass 10. The opening region 40C is formed in the shielding layer 14 (inner-surface shielding layer 14A) at the corner CR between one side edge and a bottom edge so as to expose the corner of the outer periphery 15A of the functional film 15. Because 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 likely to be large at the corner CR, it is preferable to form the opening region 40C so that air bubble generation can be confirmed.

[0097] The opening region 40D is formed on a side of the inner-surface shielding layer 14A opposite to the side on which the opening region 40A is formed. That is, the opening region 40D is provided on the bottom edge of the laminated glass 10. The opening region 40D is formed in the shielding layer 14 (inner-surface shielding layer 14A) on the bottom edge so as to expose a portion of the outer periphery 15A of the functional film 15 on the bottom edge. As shown in FIG. 7 , the opening region 40 may be formed on each side of the inner-surface shielding layer 14A. In the example of FIG. 7 , the length of the opening region 40 exposing one 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 a side of the outer periphery 15A of the functional film 15 that overlaps with the first side 14A1 of the inner surface shielding layer 14A, and the length L0 of the opening region 40B along this side is shorter than the length of the region of the first side 14A1 that is covered by the shielding layer 14. The length of the region of the first side 14A1 that is covered by the shielding layer 14 is the length Ls of the first side 14A1 minus the length L0 of the opening region 40B (Ls - L0). Similarly, the opening region 40E is shorter than the length of the region of the second side 14A2 that is covered by the shielding layer 14. This makes it possible to check for the presence or absence of air bubbles in the outer periphery 15A of the functional film 15 without unnecessarily exposing the outer periphery 15A.

[0098] The opening region 40A is formed in a location where the minimum distance D (see FIG. 5) is 12 mm or more. The opening regions 40B, 40C, 40D, and 40E are formed in locations where the minimum distance D is less than 12 mm. In this way, the predetermined locations that are not covered by the shielding layer 14 and are visible may include a first predetermined location (opening region 40A) where the minimum distance D is 12 mm or more and second predetermined locations (opening regions 40B to 40E) where the minimum distance D is less than 12 mm. The opening regions 40A to 40E not only allow for confirmation of bubble formation at the outer periphery 15A of the functional film 15, but also allow for confirmation of the position of the functional film 15 in the laminated glass 10 (position in a plan view). In other words, the position of the outer periphery 15A of the functional film 15 within the opening regions 40A to 40E allows for confirmation of whether the position of the functional film 15 within the laminated glass 10 is within an acceptable range. 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 position where the minimum distance D is less than 12 mm, it is clear that the position of the functional film 15 is significantly misaligned. By taking misalignment into consideration, it is possible to select glass in which bubbles may have occurred inside the opening region 40A formed at the location where bubble generation needs to be checked. From the perspective of checking for misalignment, it is preferable that opening regions 40 are formed on two adjacent sides of the inner-surface shielding layer 14A. For example, the vertical and horizontal misalignment of the functional film 15 in FIG. 7 can be confirmed by using the opening region 40A and the opening region 40B or 40E. A mark indicating the proper position (design position) of the outer periphery 15A of the functional film 15 can be provided on the periphery of the opening regions 40A to 40E (on the surface of the inner-surface shielding layer 14A). By comparing the position of the mark with the actual position of the outer periphery 15A within the opening region 40, misalignment of the functional film 15 can be easily confirmed. The opening regions 40 may be formed on two opposing sides of the inner surface shielding layer 14A, or on three or more sides.

[0099] Fig. 8 is an enlarged plan view showing an example of an opening region. Fig. 8 shows the location where the opening region 40 is formed in the laminated glass 10, as viewed from the vehicle interior side of the second glass sheet 12. In Fig. 8, the downward direction in the figure with respect to the outer periphery 15A of the functional film 15 is the center side of the laminated glass 10, where the functional film 15 is arranged. The upward direction in the figure with respect to the outer periphery 15A is the outer periphery side of the laminated glass 10, where the interlayer film 13C around the functional film 15 is arranged.

[0100] The opening region 40 (opening regions 40A to 40E) is preferably formed from a position closer to the center than the outer periphery 15A of the functional film 15, across the outer periphery 15A of the functional film 15, and over a position overlapping with a portion of the interlayer 13C adjacent to the outer periphery 15A of the functional film 15, in a plan view of the second glass plate 12. That is, the opening region 40 is formed over a range of a first length L1 from the outer periphery 15A of the functional film 15 toward the center, in a plan view of the second glass plate 12. Furthermore, the opening region 40 is formed over a range of a second length L2 from the outer periphery 15A of the functional film 15 toward the interlayer 13C (outside), in a plan view of the second glass plate 12. The first length L1 and the second length L2 are both greater than 0 mm. This allows the outer periphery 15A of the functional film 15 to be reliably viewed within the opening region 40. That is, the position of the outer periphery 15A in a plan view of the second glass plate 12 actually varies within a certain tolerance range. For example, if the laminated glass 10 is designed so that the position of the outer periphery 15A coincides with the inner periphery IE of the opening region 40 (i.e., is flush), an operator cannot determine, by looking at the opening region 40, 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 is shifted outward from the inner periphery IE and is therefore covered by the shielding layer 14. By including the portions of the opening region 40 near both the functional film 15 side and the interlayer 13C side relative to the outer periphery 15A (portions of the first length L1 and the second length L2), the outer periphery 15A of the functional film 15 is reliably positioned within the opening region 40. Therefore, the presence or absence of air bubbles in the outer periphery 15A can be reliably confirmed.

[0101] The first length L1 and the second length L2 may be the same or different. By setting the first length L1 and the second length L2 according to the tolerance range, the opening region 40 does not become too small, so that the outer periphery 15A can be positioned sufficiently inside the opening region 40 even if the position of the outer periphery 15A varies from the design value.

[0102] 8, for convenience of illustration, the outer periphery 15A of the functional film 15 is shown with a black line, but if the functional film 15 and the intermediate film 13C are transparent, for example, it is difficult to create contrast at the boundary between them, making it difficult to visually recognize the outer periphery 15A. Therefore, FIG. 8 shows an example in which a mark 70 is provided in the opening region 40. That is, a mark 70 (mark 70A) indicating the position of the outer periphery 15A of the functional film 15 is formed at a position adjacent to the opening region 40 or inside the opening region 40 in a plan view of the second glass plate 12.

[0103] The mark 70 is a marker for identifying the position of the outer periphery 15A of the functional film 15. The mark 70 is formed to indicate the proper position (design position) of the outer periphery 15A. Even if the actual position of the outer periphery 15A varies within the tolerance range, the outer periphery 15A can be easily identified by using the position indicated by the mark 70 as a clue. The mark 70 is preferably shaped to pinpoint the position (design position) of the outer periphery 15A, such as an arrow or a line. In FIG. 8 , the mark 70 is formed in a triangular shape with its apex pointing to the position of the outer periphery 15A. In FIG. 8 , the marks 70 are provided (a pair) on both sides of the opening region 40 in the direction in which the outer periphery 15A of the functional film 15 extends (the left-right direction in FIG. 8 ), but they may also be provided on only one side. When the outer periphery 15A is positioned in the proper position, the outer periphery 15A is positioned on a line 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 possible to easily inspect for the presence or absence of air bubbles at the outer periphery 15A. Furthermore, as described above, it is also possible to check whether the position of the functional film 15 inside the laminated glass 10 is within the tolerance range based on 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.

[0104] In the example of FIG. 8 , the mark 70 has a planar shape smaller than the opening region 40. The mark 70 is formed, for example, by a small opening region formed in the shielding layer 14 so as to be adjacent to the inner edge IE of the opening region 40. That is, like the opening region 40, the mark 70 can be formed as a region where the shielding layer 14 is not formed. The mark 70 may constitute part of the inner edge IE of the opening region 40. For example, the mark 70 may be a convex portion formed to protrude inward from the inner edge IE, or a concave portion recessed outward from the inner edge IE. The mark 70 may be applied with ink or the like to the surface of the shielding layer 14 or the surface of a glass plate located inside the opening region 40. For example, as shown imaginarily by the two-dot chain line in FIG. 8 , a mark 70A may be applied to the surface (third or fourth surface) of the second glass plate 12 inside the opening region 40 instead of or together with the mark 70.

[0105] (Method for manufacturing laminated glass) Next, a method for manufacturing the laminated glass 10 described above will be described. To manufacture the laminated glass 10, a laminate is prepared by sandwiching the interlayer 13 and the functional film 15 between the first glass plate 11 and the second glass plate 12. Then, for example, this laminate is placed in a rubber bag and press-bonded at a temperature of about 50°C or higher and 100°C or lower in a vacuum with a gauge pressure of -100 kPa or higher and -65 kPa or lower. The heating conditions, temperature conditions, vacuum conditions, and lamination method for press-bonding are appropriately selected in consideration of the properties of the light control layer 18 so as not to deteriorate during lamination. The press-bonding step may be performed using a nip roller or the like instead of a rubber bag.

[0106] Furthermore, after the pressure-bonding step, a heat-pressure bonding treatment may be performed in an autoclave under conditions of, for example, 80° C. to 150° C. and a pressure of 0.6 MPa to 1.3 MPa, thereby obtaining a laminated glass 10 with even greater durability. However, in some cases, this heat-pressure step may not be used in consideration of process simplification and the properties of the material to be sealed in the laminated glass 10.

[0107] When a transparent adhesive sheet (OCA) is used as the interlayer 13 in the process of producing the laminate, a first laminate may be produced by attaching the light control layer 18 and the interlayer 13C to the second glass plate 12 via the interlayer 13B, and then attaching the first glass plate 11 to the light control layer 18 of the first laminate via the interlayer 13A to produce the laminate. In this case, an adhesive film may be used for the interlayer 13. If the outer periphery of the light control layer 18 can be surrounded by the interlayer 13A and the interlayer 13B alone, the frame-shaped interlayer 13C is not necessary.

[0108] The temperature conditions and vacuum conditions are appropriately selected in consideration of the properties of the intermediate film 13 and the light-controlling layer 18 so that they do not deteriorate during lamination.

[0109] Furthermore, when a curable transparent resin (OCR) is used as the interlayer film 13 in the process of producing the laminate, for example, the position of the light-controlling layer 18 is fixed in the space between the second glass plate 12 and the first glass plate 11. Then, the periphery of the space between the second glass plate 12 and the first glass plate 11 is sealed with tape or the like to separate the space from the outside. Then, the curable transparent resin is poured into the space to fill it with the curable transparent resin. The curable transparent resin is then cured to form the interlayer film 13. Note that any method for curing the curable transparent resin may be used, and examples thereof include heat curing, light curing, and moisture curing.

[0110] When the laminated glass 10 has a curved shape, the first glass sheet 11 and the second glass sheet 12 may be bent by a conventionally known bending method. For example, the first glass sheet 11 and the second glass sheet 12 may be placed in a ring-shaped mold, heated to a softening point or higher, and bent by their own weight. Alternatively, the first glass sheet 11 and the second glass sheet 12 may be press-formed individually or together in an overheated state.

[0111] The above-described manufacturing process for the laminated glass 10 is an example, and the laminated glass 10 may be manufactured using, for example, a cold bending method.

[0112] Second Embodiment Next, a laminated glass 10 according to a second embodiment will be described. Fig. 9 is a schematic diagram of the laminated glass 10 according to the second embodiment.

[0113] In the second embodiment, the laminated glass 10 is configured as a door glass of a vehicle. The door glass is installed so as to be movable (raised and lowered) by a door glass movement mechanism 91 provided in the vehicle. Therefore, the laminated glass 10 according to the second embodiment has a connection part 50 that is attached to the movement mechanism 91. The movement mechanism 91 is, for example, a power window mechanism provided in the vehicle, and includes an electric motor and a power transmission mechanism.

[0114] The connection portion 50 is provided on at least one of the first glass plate 11 and the second glass plate 12. The connection portion 50 is a part of the glass plate. In plan view, the connection portion 50 is disposed on the outer periphery of the glass and is a protruding portion that protrudes outward. As in the example of Figure 9, the connection portion 50 is usually formed so as to protrude downward from the lower edge of the laminated glass 10. A fixing device 51 for fixing the connection portion 50 to the movement mechanism 91 is attached to the connection portion 50, or a through hole for fixing is formed in the connection portion 50. Figure 9 shows an example in which a fixing device 51 is attached to the connection portion 50.

[0115] The laminated glass 10 can be divided into a window portion 55 that functions as a window in the door portion of the vehicle, and a connection portion 50. The window portion 55 is exposed within the window frame of the door portion and is visible from inside and outside the vehicle. The connection portion 50 is always located outside the window frame (whether the window is fully open or fully closed) and is hidden by the interior and exterior materials of the vehicle. The connection portion 50 does not need to be provided on both the first glass sheet 11 and the second glass sheet 12. For example, one of the first glass sheet 11 and the second glass sheet 12 may be formed in the shape of the window portion 55 (without the connection portion 50), and the other of the first glass sheet 11 and the second glass sheet 12 may be formed with both the window portion 55 and the connection portion 50.

[0116] The functional film 15 is formed in the region of the window portion 55, and is not provided in the connection portion 50. The shielding layer 14 (inner surface shielding layer 14A and outer surface shielding layer 14B) is formed in a strip shape along the outer periphery 15A of the functional film 15 in a plan view of the second glass plate 12, and is not provided in the connection portion 50.

[0117] In the second embodiment, in a plan view of the second glass plate 12, at least a portion of the outer periphery 15A of the functional film 15 closest to the connection portion 50 (i.e., the bottom side 15B) is visible without being covered by the shielding layer 14. FIG. 10 is an enlarged plan view of an opening region according to the second embodiment. As shown in FIG. 10 , an opening region 40 is formed in the inner surface shielding layer 14A at a predetermined location that overlaps with the bottom side 15B of the outer periphery 15A of the functional film 15. Because the connection portion 50 protrudes outward from the outer periphery of the glass, the minimum distance D from the outer periphery 15A of the functional film 15 to the outer periphery of the glass is large where the connection portion 50 is formed. Therefore, by providing the opening region 40, it is possible to check for the occurrence of bubbles in the outer periphery 15A of the functional film 15, which is located away from the outer periphery of the glass.

[0118] 10 , the opening region 40 is formed over the entire side (lower side 15B) of the outer periphery 15A of the functional film 15 that is closest to the connection portion 50. A region BR of the opening region 40 is also a portion where the electrode 30 (wiring 31) of the functional film 15 is formed.

[0119] Thus, in the second embodiment, in a laminated glass 10 having a connection portion 50 used for door glass, etc., an opening region 40 is formed at a location corresponding to the boundary between the window portion 55 and the connection portion 50.

[0120] (Shape of Opening Region) The opening region 40 is not limited to the shapes shown in the first and second embodiments. Next, examples of the shape of the opening region 40 will be described. The opening region 40 can be formed in the shapes shown in Figures 11 to 13.

[0121] FIG. 11 is a schematic diagram showing an annular opening region 40. In FIG. 11 , the opening region 40 is an annular region that divides (segments) the inner-surface shielding layer 14A into an inner peripheral first portion 61 and an outer peripheral second portion 62. The inner-surface shielding layer 14A is formed as a whole in an annular shape that extends around the entire outer periphery 15A of the functional film 15. The first portion 61 of the inner-surface shielding layer 14A is formed in an annular shape that surrounds the center of the laminated glass 10. The second portion 62 of the inner-surface shielding layer 14A is formed in an annular shape that follows the outer periphery of the laminated glass 10. The opening region 40 is formed in an annular shape that extends around the entire outer periphery 15A of the functional film 15 between the first portion 61 and the second portion 62. Therefore, in FIG. 11 , in a plan view of the second glass plate 12, the entire outer periphery 15A of the functional film 15 is visible without being covered by the shielding layer 14. 11 , a portion of the functional film 15 shown by a colored portion can be seen throughout the entire periphery 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, the opening region 40 may be partially interrupted at one or more locations, so that the first portion 61 and the second portion 62 are partially connected.

[0122] FIG. 12 is a schematic diagram showing an opening region 40 consisting of a hole. Similar to the opening region 40 illustrated in the first and second embodiments, FIG. 12 shows a hole (opening) partially formed between the inner peripheral edge 63 and the outer peripheral edge 64 of the inner-surface shielding layer 14A in a plan view. The opening region 40 has a closed annular periphery. In FIG. 12, the opening region 40 is locally formed in a portion between the inner peripheral edge 63 and the outer peripheral edge 64 of the inner-surface shielding layer 14A. The formation range (length) of the opening region 40 is arbitrary. In FIG. 12, the opening region 40 is formed so as to overlap one side (lower side 15B) of the outer periphery 15A of the functional film 15 in a plan view. The opening region 40 may also be formed on another side (upper side 15C) opposite the one side (lower side 15B) in a plan view. The opening region 40 may also be formed on each side of the outer periphery 15A of the functional film 15, as shown in FIG. 7. Furthermore, when an open region 40 is formed on each side and the open regions 40 on each side are connected to each other, it becomes equivalent to the annular open region 40 in FIG.

[0123] Figure 13 is a schematic diagram showing an opening region 40 consisting of a cutout. In Figure 13, opening regions 40F, 40G, and 40H are formed in the shielding layer 14 (inner shielding layer 14A). The opening regions 40F, 40G, and 40H are cutouts extending from the periphery of the inner shielding layer 14A. The peripheries of the opening regions 40F, 40G, and 40H are not closed annularly but are partially open. The opening regions 40F and 40G are cutouts extending from the outer peripheral edge 64 of the inner shielding layer 14A toward the center of the laminated glass 10. The opening region 40H is a cutout extending from the inner peripheral edge 63 of the inner shielding layer 14A toward the outside of the laminated glass 10. Each of the opening regions 40F, 40G, and 40H extends from the periphery (outer peripheral edge 64 or inner peripheral edge 63) of the inner surface shielding layer 14A to a position overlapping with a portion of the outer periphery 15A of the functional film 15, thereby making a portion of the outer periphery 15A of the functional film 15 visible.

[0124] The opening region 40 in each of the above-described embodiments may have any of the shapes shown in Figures 11 to 13. The opening region 40 may be formed not only in the inner shielding layer 14A of the shielding layer 14, but also in the outer shielding layer 14B, or may be formed in both the inner shielding layer 14A and the outer shielding layer 14B. When multiple opening regions 40 are provided, one or more of a hole, a cutout, and an annular region may be provided. In other words, two or three of a hole, a cutout, and annular region may be mixed.

[0125] (Effect) Laminated glass 10 according to the first aspect of the present disclosure includes first glass plate 11 and second glass plate 12, functional film 15 located between first glass plate 11 and second glass plate 12, interlayer film 13 surrounding outer periphery 15A of functional film 15, and shielding layer 14 that partially overlaps functional film 15 in a plan view, and in a plan view of second glass plate 12, at least a portion of outer periphery 15A of functional film 15 is visible without being covered by shielding layer 14. This makes it possible to visually check the bubble confirmation area on outer periphery 15A of functional film 15 even when functional film 15 is covered by shielding layer 14, making it possible to check whether or not bubbles have occurred on outer periphery 15A of functional film 15.

[0126] The laminated glass 10 according to a second aspect of the present disclosure is the laminated glass 10 according to the first aspect, wherein the shielding layer 14 includes an inner surface shielding layer 14A disposed on a main surface of the second glass plate 12 or between the functional film 15 and the second glass plate 12, and the inner surface shielding layer 14A has an opening region 40 at a position overlapping with a part of the outer periphery 15A of the functional film 15 in a plan view of the second glass plate 12. This makes it possible to check the presence or absence of bubbles on the outer periphery 15A of the functional film 15 through the opening region 40.

[0127] The laminated glass 10 according to a third aspect of the present disclosure is the laminated glass 10 according to the second aspect, wherein the inner surface shielding layer 14A is formed in a band shape along the outer periphery 15A of the functional film 15 in a plan view of the second glass sheet 12. This allows the area along the outer periphery 15A of the functional film 15 to be concealed from the outside while leaving part of the outer periphery 15A of the functional film 15 visible. This makes it possible to suppress deterioration of the outer periphery 15A of the functional film 15 due to ultraviolet rays. Furthermore, the electrodes 30 and electrode lead wires 31 electrically connected to the functional film 15 can be concealed so as to be difficult to see from inside the vehicle.

[0128] The laminated glass 10 according to a fourth aspect of the present disclosure is the laminated glass 10 according to the second or third aspect, wherein the inner surface shielding layer 14A covers the entire outer periphery 15A of the functional film 15, excluding the opening region 40, in a plan view of the second glass plate 12. This obscures the entire outer periphery 15A of the functional film 15, excluding the area where bubbles can be found, due to the opening region 40, and effectively suppresses deterioration due to ultraviolet rays.

[0129] A laminated glass 10 according to a fifth aspect of the present disclosure is the laminated glass 10 according to the third or fourth aspect, 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 the opening region 40 is formed on the second side 14A2. The wider second side 14A2 tends to position the outer periphery 15A of the functional film 15 away from the outer periphery of the glass sheet. Therefore, by forming the opening region 40 in this portion, it is possible to check for the occurrence 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 sheet.

[0130] The laminated glass 10 according to a sixth aspect of the present disclosure is the laminated glass 10 according to any one of the second to fifth aspects, wherein the opening region 40 includes one or more of the following: a hole partially formed between the inner peripheral edge 63 and the outer peripheral edge 64 of the inner-surface shielding layer 14A; a notch extending from the peripheral edge of the inner-surface shielding layer 14A; and an annular region dividing the inner-surface shielding layer 14A into an inner peripheral first portion 61 and an outer peripheral second portion 62. This makes it possible to form the opening region 40 in an appropriate shape depending on the portion of the outer periphery 15A of the functional film 15 where it is desired to check for bubble generation.

[0131] The laminated glass 10 according to a seventh aspect of the present disclosure is the laminated glass 10 according to any one of the second to sixth aspects, wherein the inner surface shielding layer 14A is disposed on a main surface of the second glass sheet 12 that is located opposite the functional film 15. Because the inner surface shielding layer 14A is on the outer surface (the surface facing the vehicle interior) of the second glass sheet 12, the inner surface shielding layer 14A can protect the second glass sheet 12. Furthermore, if necessary, an opening region 40 can be formed by post-processing after lamination of the laminated glass 10.

[0132] The laminated glass 10 according to an eighth aspect of the present disclosure is the laminated glass 10 according to any one of the second to seventh aspects, wherein the shielding layer 14 includes an outer shielding layer 14B disposed on a main surface of the first glass sheet 11 or between the functional film 15 and the first glass sheet 11. This allows the outer shielding layer 14B and the inner shielding layer 14A to be formed on the first glass sheet 11 and the second glass sheet 12, respectively, thereby concealing the electrodes 30 and the electrode lead wires 31 from both the exterior and interior sides of the vehicle. Furthermore, if the outer shielding layer 14B and the inner shielding layer 14A are made of a highly rigid material such as ceramic and are formed directly on the main surfaces of the first glass sheet 11 and the second glass sheet 12, the bending tendency of the first glass sheet 11 and the second glass sheet 12 can be made uniform.

[0133] The laminated glass 10 according to a ninth aspect of the present disclosure is the laminated glass 10 according to any one of the first to eighth aspects, wherein the functional film 15 has a thickness of 0.1 mm or more. When the functional film 15 is thick like this, the frame-shaped interlayer 13C surrounds the outer periphery 15A of the functional film 15, which makes it easy for bubbles to form on the outer periphery 15A of the functional film 15. Therefore, a configuration that allows the presence or absence of bubbles on the outer periphery 15A of the functional film 15 to be confirmed is particularly useful.

[0134] The laminated glass 10 according to a tenth aspect of the present disclosure is the laminated glass 10 according to any one of the first to ninth aspects, wherein, in a plan view of the second glass sheet 12, a predetermined location on the outer periphery 15A of the functional film 15 is visible without being covered by the shielding layer 14, and the predetermined location includes a location where, in a plan view, the minimum distance D from the outer periphery of the first glass sheet 11 or the outer periphery of the second glass sheet 12 is 12 mm or more. This makes it easy to check from the outside for the presence or absence of bubbles in predetermined locations where inspection may be required (locations 12 mm or more, particularly 13 mm or more from the glass outer periphery) when the laminated glass 10 having the functional film 15 is configured as safety glass for vehicles.

[0135] The laminated glass 10 according to an eleventh aspect of the present disclosure is the laminated glass 10 according to the tenth aspect, except that the predetermined locations include a first predetermined location (where the opening region 40A is formed) where the minimum distance D is 12 mm or more, and a second predetermined location (where the opening regions 40B to 40E are formed) where the minimum distance D is less than 12 mm. This makes it possible to check for misalignment of the functional film 15 at the second predetermined location, and then check for the presence or absence of bubbles at the first predetermined location while taking that misalignment into account. This makes it possible to select laminated glass 10 that may contain bubbles that cannot be seen from the first predetermined location due to misalignment.

[0136] The laminated glass 10 according to a twelfth aspect of the present disclosure is the laminated glass 10 according to any one of the first to eleventh aspects, wherein the functional film 15 has an electrode 30 on a part of its outer periphery, and in a plan view of the second glass plate 12, at least the portion of the outer periphery 15A of the functional film 15 where the electrode 30 is formed is visible without being covered by the shielding layer 14. This makes it easy to check from the outside whether or not there are any bubbles where the electrode 30 is formed (the connection portion with the wiring 31).

[0137] The laminated glass 10 according to a thirteenth aspect of the present disclosure is the laminated glass 10 according to any one of the first to twelfth aspects, wherein at least one of the first glass sheet 11 and the second glass sheet 12 has a connecting portion 50 that protrudes outward and is attached to the movement mechanism 91 on the outer periphery of the glass in a plan view, and at least a portion of the side of the outer periphery 15A of the functional film 15 that is closest to the connecting portion 50 is visible without being covered by the shielding layer 14 in a plan view of the second glass sheet 12. As a result, even when the laminated glass 10 having the functional film 15 is configured as an openable window glass such as a door glass, the presence or absence of air bubbles away from the outer periphery of the glass can be easily confirmed from the outside.

[0138] A laminated glass 10 according to a fourteenth aspect of the present disclosure is the laminated glass 10 according to any one of the first to thirteenth aspects, wherein at least one of the first glass sheet 11 and the second glass sheet 12 includes, in a plan view, a curved portion CV that is convex outward on the outer periphery of the glass, the functional film 15 has, in a plan view, a straight portion SL on the outer periphery that faces the curved portion CV, and at least a part of the straight portion SL on the outer periphery 15A of the functional film 15 is visible without being covered by the shielding layer 14 in a plan view of the second glass sheet 12. In this case, the straight portion SL on the outer periphery 15A of the functional film 15 tends to be located at a position away from the glass periphery (curved portion CV), but the presence or absence of air bubbles at a position away from the glass periphery can be easily confirmed from the outside.

[0139] The laminated glass 10 according to a fifteenth aspect of the present disclosure is the laminated glass 10 according to any one of the first to fourteenth aspects, in which the functional film 15 includes any one of a light control film, an electric heating film, a light-emitting display film, and a solar cell film. This allows the laminated glass 10 to have a desired function. Even in this case, the generation of bubbles on the periphery, which may cause deterioration of the functional film 15, can be easily confirmed.

[0140] The laminated glass 10 according to a sixteenth aspect of the present disclosure is the laminated glass 10 according to any one of the second to eighth aspects, wherein the opening region 40 is formed, in a plan view of the second glass plate 12, from a position closer to the center than the outer periphery 15A of the functional film 15, across the outer periphery 15A of the functional film 15, to a position overlapping with a part of the interlayer film 13C adjacent to the outer periphery 15A of the functional film 15. This makes it possible to more reliably view the outer periphery 15A of the functional film 15 within the interior region of the opening region 40, even if the position of the outer periphery 15A of the second glass plate 12 in a plan view varies within the tolerance range.

[0141] A laminated glass 10 according to a seventeenth aspect of the present disclosure is the laminated glass 10 according to the sixteenth aspect, wherein the opening region 40 is formed over a range of a first length L1 from the outer periphery 15A of the functional film 15 toward the center in a plan view of the second glass plate 12, and the opening region 40 is formed over a range of a second length L2 from the outer periphery 15A of the functional film 15 toward the interlayer 13C in a plan view of the second glass plate 12. Thus, by setting the first length L1 and the second length L2 according to the tolerance range, the outer periphery 15A can be positioned sufficiently inside the opening region 40 even if the position of the outer periphery 15A varies from the design value.

[0142] The laminated glass 10 according to an eighteenth aspect of the present disclosure is the laminated glass 10 according to any one of the second to eighth aspects, except that a mark 70 (or mark 70A) indicating the position of the outer periphery 15A of the functional film 15 is formed adjacent to the opening region 40 or within the opening region 40 in a plan view of the second glass plate 12. This allows the position of the outer periphery 15A of the functional film 15 to be easily recognized when viewing the opening region 40, using the support position of the mark 70 as a clue. As a result, the presence or absence of air bubbles in the outer periphery 15A can be easily inspected. Furthermore, the deviation between the indicated position of the mark 70 and the position of the outer periphery 15A of the functional film 15 can be used to check whether the position of the functional film 15 within the laminated glass 10 is within an acceptable range.

[0143] A vehicle window unit 1 according to a nineteenth aspect of the present disclosure includes the laminated glass 10 according to any one of the first to eighteenth aspects and a frame 20 provided on the peripheral edge of the laminated glass 10 and attached to a vehicle, wherein 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 interior material 90, or the vehicle door panel. This makes it easy to check for the occurrence of air bubbles on the outer periphery 15A of the functional film 15 when inspecting the laminated glass 10 before assembling the frame 20, and after assembling the frame 20 or assembling the vehicle window unit 1 to the vehicle, the portion that is not covered by the shielding layer 14 and is visible can be hidden from the outside. Therefore, even if the shielding layer 14 is provided so as to make the outer periphery 15A of the functional film 15 visible, it is possible to prevent the design of the assembled product from being affected.

[0144] Although the embodiments of the present invention have been described above, the embodiments are not limited to the contents of these embodiments. Furthermore, the above-described components include those that can be easily imagined by a person skilled in the art, those that are substantially the same, and those that are within the scope of what is called equivalents. Furthermore, the above-described components can be combined as appropriate. Furthermore, various omissions, substitutions, or modifications of the components can be made without departing from the spirit of the above-described embodiments.

[0145] DESCRIPTION OF SYMBOLS 1 Vehicle window unit 10 Laminated glass 11 First glass plate 12 Second glass plate 13, 13A, 13B, 13C Interlayer 14 Shielding layer 14A Inner surface shielding layer 14A1 First edge 14A2 Second edge 14B Outer surface shielding layer 15 Functional film 15A Outer periphery 15B Lower edge 15C Upper edge 16 Substrate 16A Transparent substrate 16B Transparent substrate 17 Conductive film 17A Transparent conductive film 17B Transparent conductive film 18 Light control layer 20 Frame 30, 30A, 30B Electrode 31, 31A, 31B Wiring 32 Control unit 33 Terminal portion 40, 40A, 40B, 40C, 40D, 40E, 40F, 40G, 40H Opening region 50 Connection portion 51 Fixture 55 Window 61 First portion 62 Second portion 63 Inner peripheral edge 64 Outer peripheral edge 70, 70A Mark 90 Interior material 90A Inner peripheral edge position 91 Movement mechanism CR Corner portion CV Curved portion D Minimum distance L1 First length L2 Second length P1 Position P2 Position P3 Position SL Straight portion

Claims

1. A laminated glass comprising: 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 in a planar view, wherein at least a portion of the outer periphery of the functional film is visible without being covered by the shielding layer in a planar view of the second glass plate.

2. The laminated glass according to claim 1, wherein the shielding layer includes an inner surface shielding layer disposed on a main surface of the second glass plate or between the functional film and the second glass plate, and the inner surface shielding layer has an opening region at a position overlapping with part of the outer periphery of the functional film in a plan view of the second glass plate.

3. The laminated glass according to claim 2, wherein the inner surface shielding layer is formed in a band shape along an outer periphery of the functional film in a plan view of the second glass plate.

4. The laminated glass according to claim 3, wherein the inner surface shielding layer covers the entire outer periphery of the functional film except for the opening region in a plan view of the second glass plate.

5. The laminated glass according to claim 3, wherein the inner surface shielding layer includes a first side and a second side wider than the first side, and the opening region is formed on the second side.

6. The laminated glass according to claim 2, wherein the open region includes one or more of the following: a hole partially formed between the inner peripheral edge and outer peripheral edge of the inner-surface shielding layer; a notch extending from the peripheral edge of the inner-surface shielding layer; and an annular region dividing the inner-surface shielding layer into a first portion on the inner periphery and a second portion on the outer periphery.

7. The laminated glass according to claim 2, wherein the inner surface shielding layer is disposed on a main surface of the second glass plate that is located opposite to the functional film.

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

9. The laminated glass according to claim 1, wherein the functional film has a thickness of 0.1 mm or more.

10. The laminated glass according to claim 1, wherein, in a planar view of the second glass plate, a predetermined location on the outer periphery of the functional film is visible without being covered by the shielding layer, and the predetermined location includes a location whose minimum distance from the outer periphery of the first glass plate or the outer periphery of the second glass plate in a planar view is 12 mm or more.

11. The laminated glass according to claim 10, wherein the predetermined locations include a first predetermined location where the minimum distance is 12 mm or more, and a second predetermined location where the minimum distance is less than 12 mm.

12. The laminated glass according to claim 1, wherein the functional film has an electrode on part of its outer periphery, and in a plan view of the second glass plate, at least the portion of the outer periphery of the functional film where the electrode is formed is visible without being covered by the shielding layer.

13. The laminated glass according to claim 1, wherein at least one of the first glass plate and the second glass plate has a connection portion that protrudes outward on the outer periphery of the glass in a planar view and is attached to a moving mechanism, and wherein at least a portion of the edge of the outer periphery of the functional film closest to the connection portion is visible without being covered by the shielding layer in a planar view of the second glass plate.

14. The laminated glass according to claim 1, wherein at least one of the first glass plate and the second glass plate includes, in a plan view, a curved portion that is convex outward on the outer periphery of the glass, the functional film has, in a plan view, a straight line portion of the outer periphery that faces the curved portion, and at least a part of the straight line portion of the outer periphery of the functional film is visible without being covered by the shielding layer in a plan view of the second glass plate.

15. The laminated glass according to claim 1, wherein the functional film comprises any one of a light control film, an electric heat film, a light emitting display film, and a solar cell film.

16. The laminated glass according to claim 2, wherein the opening region is formed, in a plan view of the second glass plate, from a position closer to the center than the outer periphery of the functional film, across the outer periphery of the functional film, and over a position overlapping with a portion of the intermediate film adjacent to the outer periphery of the functional film.

17. The laminated glass according to claim 16, wherein the opening region is formed over a first length range from the outer periphery of the functional film toward the center in a planar view of the second glass plate, and the opening region is formed over a second length range from the outer periphery of the functional film toward the intermediate film in a planar view of the second glass plate.

18. The laminated glass according to claim 2, wherein a mark indicating the position of the outer periphery of the functional film is formed at a position adjacent to the opening region or inside the opening region in a plan view of the second glass plate.

19. A vehicle window unit comprising: the laminated glass according to any one of claims 1 to 18; and a frame provided on the peripheral edge of the laminated glass and attached to a vehicle, wherein a portion of the outer periphery of the functional film that is not covered by the shielding layer and is visible is covered by the frame, an interior material of the vehicle, or a door panel of the vehicle.

Images