Laminated glass

Abstract

To provide a laminated glass that can significantly reduce air bubbles residual inside the glass.SOLUTION: A laminated glass is provided in which a first glass substrate and a second glass substrate are laminated to each other. The laminated glass has: a first interlayer film which is arranged between the first glass substrate and the second glass substrate, and comes in contact with the first glass substrate; a second interlayer film which is arranged between the first glass substrate and the second glass substrate, and contacts the second glass substrate; and first and second functional members which are arranged between the first interlayer film and the second interlayer film, and come in contact with the first interlayer film and the second interlayer film, wherein the first and second functional members have higher rigidity than the first and second interlayer films, the first and second functional members are arranged while separated from each other by a distance d when the laminated glass is viewed in a plane view, and the distance d is 15 mm or more.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to laminated glass. [Background technology]

[0002] BACKGROUND ART Laminated glass, which is constructed by laminating a pair of glass substrates with an interlayer film disposed on the surface of each glass substrate, is widely used, for example, as glass components for vehicles.

[0003] In recent years, various functional components have been enclosed inside laminated glass to provide additional functions to the laminated glass. For example, when a light control film is enclosed between a pair of interlayer films, it becomes possible to appropriately adjust the transmittance of the laminated glass depending on the environment (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-36967 Summary of the Invention [Problem to be solved by the invention]

[0005] When a functional component is enclosed inside laminated glass, wrinkles may occur in the functional component. In particular, when the glass substrate has a curved surface and the functional component has higher rigidity than the interlayer film, the functional component is unable to conform to the curved surface of the glass substrate, which increases the tendency for wrinkles to occur.

[0006] Therefore, in order to prevent the occurrence of such wrinkles, it is conceivable to arrange the functional components separately inside the interlayer film.

[0007] However, in a configuration in which multiple divided functional components are arranged at a distance from each other along the surface direction of the glass substrate, there is a high possibility that air bubbles will remain in the gaps between the functional components. Furthermore, if the remaining air bubbles become significant, the adhesion between the functional component and the interlayer film will decrease, and peeling will likely occur at the interface between the functional component and the interlayer film.

[0008] The present invention has been made in view of the above background, and an object of the present invention is to provide laminated glass that can significantly reduce the amount of bubbles remaining inside. [Means for solving the problem]

[0009] The present invention provides a laminated glass in which a first glass substrate and a second glass substrate are laminated together, a first interlayer film disposed between the first glass substrate and the second glass substrate and in contact with the first glass substrate; a second interlayer film disposed between the first glass substrate and the second glass substrate and in contact with the second glass substrate; first and second functional components disposed between the first interlayer film and the second interlayer film and in contact with the first interlayer film and the second interlayer film; and the first and second functional components have higher rigidity than the first and second interlayer films; the first and second functional components are arranged at a distance d from each other when the laminated glass is viewed in plan view, There is provided a laminated glass in which the distance d is 15 mm or more. [Effects of the Invention]

[0010] The present invention provides a laminated glass that can significantly reduce the amount of bubbles remaining inside. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a plan view schematically showing a laminated glass according to an embodiment of the present invention. [Figure 2] FIG. 2 is a schematic perspective view of the laminated glass according to the embodiment of the present invention shown in FIG. [Figure 3] FIG. 2 is a cross-sectional view schematically showing a cross section taken along line I-I in FIG. [Figure 4] 1 is a cross-sectional view schematically showing an example of the configuration of a light control film to be enclosed in a laminated glass according to an embodiment of the present invention. [Figure 5] FIG. 1 is a diagram schematically illustrating a flow of a method for producing laminated glass according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] An embodiment of the present invention will be described below.

[0013] As mentioned above, when a single functional component is enclosed between interlayer films of laminated glass, the functional component may wrinkle. In particular, when the glass substrate has a curved surface and the functional component has higher rigidity than the interlayer film, it becomes difficult for the functional component to conform to the curved surface of the glass substrate, and the occurrence of wrinkles becomes more pronounced.

[0014] In contrast to this, in one embodiment of the present invention, A laminated glass in which a first glass substrate and a second glass substrate are laminated together, a first interlayer film disposed between the first glass substrate and the second glass substrate and in contact with the first glass substrate; a second interlayer film disposed between the first glass substrate and the second glass substrate and in contact with the second glass substrate; first and second functional components disposed between the first interlayer film and the second interlayer film and in contact with the first interlayer film and the second interlayer film; and the first and second functional components have higher rigidity than the first and second interlayer films; the first and second functional components are arranged at a distance d from each other when the laminated glass is viewed in plan view, There is provided a laminated glass in which the distance d is 15 mm or more.

[0015] In one embodiment of the present invention, a plurality of functional components are spaced apart from one another along the surface of the first or second glass substrate between the first and second interlayer films. This arrangement of the functional components significantly reduces the occurrence of wrinkles that may occur in the functional components compared to when a single "large" functional component is enclosed between the interlayer films.

[0016] In this application, the term "surface direction" refers to the direction in which the surface of the first glass substrate on which the first interlayer film is provided or the surface of the second glass substrate on which the second interlayer film is provided extends.

[0017] Furthermore, a plan view refers to a predetermined area viewed from the normal direction of the predetermined area. Unless otherwise specified, the term "plan view" simply refers to a laminated glass viewed from the normal direction of the laminated glass. A planar shape refers to a shape of a predetermined area viewed from the normal direction of the predetermined area.

[0018] However, simply arranging the divided functional components at a distance from each other along the surface direction of the first or second glass substrate increases the likelihood that air bubbles will remain in the areas between the functional components (hereinafter referred to as "gaps").

[0019] However, in one embodiment of the present invention, the two functional components are arranged spaced apart from each other so that the distance d between them is 15 mm or more in a plan view of the laminated glass.

[0020] In this case, during the manufacturing process of the first laminated glass 100, air bubbles are less likely to remain in the gap between the two functional components.

[0021] As a result, in one embodiment of the present invention, it is possible to provide laminated glass in which the amount of air bubbles remaining inside is significantly reduced.

[0022] Here, the above-mentioned distance d is defined as the minimum linear length of the gap between the two functional components in a plan view of the laminated glass when the laminated glass has a flat shape.

[0023] On the other hand, when the laminated glass has a curved surface, the distance d is defined as the minimum length of the curved line between the two functional components, rather than the minimum linear length of the gap between them. In this case, the dimension of the distance d varies somewhat between the first glass substrate side and the second glass substrate side of the laminated glass. Therefore, in the present application, for curved laminated glass, the distance d is defined as the value measured on the outer convex surface.

[0024] In the laminated glass according to one embodiment of the present invention, the distance d is preferably 20 mm or more. In this case, the amount of air bubbles remaining inside can be further reduced. The distance d is more preferably 30 mm or more, even more preferably 40 mm or more, and particularly preferably 60 mm or more.

[0025] On the other hand, the distance d is preferably 110 mm or less.

[0026] If the distance d is too large, the area along the surface of the first or second glass substrate where the functional component is not present becomes large, which increases the possibility of reducing the uniformity of the thickness of the first or second interlayer film and therefore the thickness of the laminated glass, and may result in distortion of the image reflected from the laminated glass.

[0027] However, by setting the distance d to 110 mm or less, the decrease in the uniformity of the thickness of the laminated glass is suppressed, and the problem of such distortion of the reflected image can be suppressed.

[0028] The distance d is more preferably 100 mm or less, even more preferably 80 mm or less, and particularly preferably 60 mm or less.

[0029] (Laminated glass according to one embodiment of the present invention) Next, the laminated glass according to one embodiment of the present invention will be described in more detail with reference to FIGS.

[0030] Fig. 1 shows a schematic plan view of a laminated glass according to one embodiment of the present invention. Fig. 2 shows a schematic perspective view of the laminated glass according to one embodiment of the present invention shown in Fig. 1. Fig. 3 also shows a schematic cross section taken along line I-I in Fig. 1.

[0031] 1 to 3, a laminated glass 100 according to one embodiment of the present invention (hereinafter referred to as "first laminated glass") includes a first glass substrate 110, a first interlayer film 130, a second interlayer film 136, and a second glass substrate 120. Furthermore, as shown in FIG. 3, the first laminated glass 100 has a first side 102 and a second side 104.

[0032] 2 and 3, the first laminated glass 100 has a curved shape. The curved shape includes a so-called "single-curve" shape, in which the laminated glass has curvature in one direction, and a so-called "double-curve" shape, in which the laminated glass has curvature in two perpendicular directions. However, this is merely an example, and the first laminated glass 100 may also have a flat shape.

[0033] The first glass substrate 110 has a first surface 112 and a second surface 114 facing each other, and the first interlayer film 130 is disposed on the first surface 112 side of the first glass substrate 110. Similarly, the second glass substrate 120 has a first surface 122 and a second surface 124 facing each other, and the second interlayer film 136 is disposed on the first surface 122 side of the second glass substrate 120. Note that, in the first glass substrate 110, the surface in contact with the first interlayer film 130 is also referred to as first surface B, and the surface not in contact with the first interlayer film 130 is also referred to as second surface B. In addition, in the second glass substrate 120, the surface in contact with the second interlayer film 136 is also referred to as first surface A, and the surface not in contact with the second interlayer film 136 is also referred to as second surface A.

[0034] The first glass substrate 110 and the second glass substrate 120 are laminated to each other with the first interlayer 130 and the second interlayer 136 facing each other. The second surface 114 of the first glass substrate 110 corresponds to the first side 102 of the first laminated glass 100, and the second surface 124 of the second glass substrate 120 corresponds to the second side 104 of the first laminated glass 100.

[0035] 2 and 3, the first side 102 on the inside of the convex surface is referred to as the "inside (of the laminated glass)," and the second side 104 on the outside of the convex surface is referred to as the "outside (of the laminated glass)." Therefore, the first glass substrate 110 is disposed on the inside of the first laminated glass 100, and the second glass substrate 120 is disposed on the outside of the first laminated glass 100.

[0036] On the other hand, when the laminated glass according to one embodiment of the present invention is flat, one of the first side 102 and the second side 104 may be referred to as the "inside (of the laminated glass)" and the other may be referred to as the "outside (of the laminated glass)."

[0037] The first laminated glass 100 also has a shielding layer 180 on the second surface 114 of the first glass substrate 110, which is arranged in a frame shape along the periphery of the second surface 114.

[0038] Furthermore, the first laminated glass 100 has a first functional component 150A and a second functional component 150B sealed between the first interlayer film 130 and the second interlayer film 136. The first functional component 150A and the second functional component 150B are arranged along the surface direction of the first laminated glass 100. The first functional component 150A and the second functional component 150B are also arranged spaced apart from each other in the surface direction. In other words, there is a region 140 (hereinafter referred to as a "gap") where no functional component is present between the first functional component 150A and the second functional component 150B.

[0039] When three or more functional members are arranged in the plane direction of the first laminated glass 100, it is preferable that there be gaps 140 between any two of the three or more functional members that are closest to each other.

[0040] As mentioned above, the "surface direction" refers to the direction in which the first surface 112 of the first glass substrate 110 or the first surface 122 of the second glass substrate 120 in the first laminated glass 100 extends.

[0041] The first functional component 150A and the second functional component 150B are spaced apart from each other such that the distance d between them is 15 mm or more.

[0042] In the case of the first laminated glass 100 having a curved surface, as mentioned above, the distance d is defined as the minimum length of the curved line between the first functional component 150A and the second functional component 150B, rather than the minimum straight-line distance of the gap 140 between them (see Figures 2 and 3).

[0043] In the first laminated glass 100, the two functional members 150A and 150B are arranged apart from each other, which significantly reduces the occurrence of wrinkles that may occur in the functional members 150A and 150B.

[0044] In the first laminated glass 100, the two functional components 150A and 150B are spaced apart from each other with a distance d between them of 15 mm or more, which significantly reduces the amount of air bubbles remaining inside the first laminated glass 100.

[0045] (Each component) Next, each component included in the laminated glass according to one embodiment of the present invention will be described in more detail. Note that the components will be described here using the first laminated glass 100 described above as an example. Therefore, the reference numerals used in Figures 1 to 3 will be used to represent each component.

[0046] (First Glass Substrate 110 and Second Glass Substrate 120) There are no particular limitations on the composition of the first glass substrate 110. The first glass substrate 110 may be made of, for example, inorganic glass such as soda lime glass or aluminosilicate, or organic glass, but inorganic glass is preferred.

[0047] The thickness of the first glass substrate 110 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 first laminated glass 100 is applied. From the viewpoint of resistance to stone chipping, the thickness of the first glass substrate 110 is preferably 0.3 mm or more, more preferably 0.5 mm or more, even more preferably 0.7 mm or more, particularly preferably 1.1 mm or more, and most preferably 1.6 mm or more.

[0048] In order to reduce the mass of the first laminated glass 100, the thickness of the first glass substrate 110 is preferably 3 mm or less, more preferably 2.6 mm or less, and even more preferably 2.1 mm or less.

[0049] The same can be said for the second glass substrate 120 as for the first glass substrate 110. Note that the second glass substrate 120 may have a different composition and / or a different thickness from the first glass substrate 110. For example, the first glass substrate 110 may be thinner than the second glass substrate 120.

[0050] (First Interlayer 130 and Second Interlayer 136) The first interlayer film 130 is typically made of resin. It may be made of, for example, a thermoplastic resin, a thermosetting resin, or a photocurable composition. Examples of thermoplastic resins that can be used include 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 (EVA), cycloolefin polymers (COP), and ethylene-ethyl acrylate copolymer resins. Alternatively, a resin composition containing a modified hydrogenated block copolymer, as described in Japanese Patent No. 6065221, may be used.

[0051] Among these, plasticized polyvinyl acetal resins and EVA are preferred because they have an excellent balance of properties such as transparency, weather resistance, strength, adhesive strength, impact energy absorption, moisture resistance, heat insulation, and sound insulation.

[0052] The term "plasticized" in the context of plasticized polyvinyl acetal resin means that the resin has been plasticized by adding a plasticizer. The same applies to other plasticized resins.

[0053] The above-mentioned thermoplastic resins may be used alone or in combination of two or more kinds.

[0054] Examples of polyvinyl acetal resins include polyvinyl formal resins obtained by reacting polyvinyl alcohol (PVA) with formaldehyde, polyvinyl acetal resins in the narrow sense obtained by reacting PVA with acetaldehyde, and polyvinyl butyral resins (PVB) obtained by reacting PVA with n-butylaldehyde. PVB is particularly preferred because it offers 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 polyvinyl acetal resins may be used alone or in combination.

[0055] The first interlayer film 130 may contain functional particles such as infrared absorbing agents, ultraviolet absorbing agents, coloring agents, and luminescent agents.

[0056] The first intermediate film 130 may also be composed of two or more layers. For example, the first intermediate film 130 may be composed of three layers, with the hardness of the central layer being lower than the hardness of each of the layers on either side, thereby improving sound insulation. In this case, the hardness of the layers on either side may be the same or different.

[0057] The thickness of the first interlayer film 130 is, for example, 0.3 mm or more at its thinnest portion and 3 mm or less at its thickest portion. A thickness of 0.3 mm or more improves impact resistance. Furthermore, a thickness of 3 mm or less reduces the mass of the first laminated glass 100.

[0058] The same can be said for the second intermediate film 136 as for the first intermediate film 130. Note that the second intermediate film 136 may be made of a different material than the first intermediate film 130 and / or may have a different thickness than the first intermediate film 130.

[0059] In addition, in the gap 140, the first interlayer film 130 may be in direct contact with the second interlayer film 136. In this case, the height level at which they contact is not particularly limited. For example, as shown in FIG. 3 , in the gap 140, the second interlayer film 136 may be in contact with the first interlayer film 130 on the first side 102 of the surfaces of the first functional component 150A and the second functional component 150B. Alternatively, the second interlayer film 136 may be in contact with the first interlayer film 130 on the second side 104 of the surfaces of the first functional component 150A and the second functional component 150B. Alternatively, the second interlayer film 136 may be in contact with the first interlayer film 130 at any position between the first side 102 and the second side 104 of the surfaces of the first functional component 150A and the second functional component 150B.

[0060] A third interlayer film (not shown) may be further provided between the first interlayer film 130 and the second interlayer film 136 at the peripheral edge of the first laminated glass 100. The material, thickness, etc. of the third interlayer film are the same as those described for the first interlayer film 130.

[0061] (First functional component 150A and second functional component 150B) The first functional component 150A and the second functional component 150B (hereinafter collectively referred to as "functional components 150") enclosed between the first interlayer film 130 and the second interlayer film 136 have a thickness in the range of, for example, 50 μm to 500 μm. The functional component 150 may also have a thickness of 100 μm to 250 μm. When the first laminated glass 100 has three or more functional components, all of these three or more functional components will be collectively referred to as "functional components 150."

[0062] The functional member 150 may be comprised of a single layer or multiple layers.

[0063] The functional member 150 has higher rigidity than the first interlayer film 130 and the second interlayer film 136. The rigidity can be expressed, for example, by the tensile modulus of elasticity. The tensile modulus of elasticity of the functional member 150 measured at 25°C and 1 Hz using a DVA220 manufactured by IT Measurement & Control Co., Ltd. is preferably, for example, 1 GPa or more.

[0064] When the functional member 150 is composed of a plurality of layers, the tensile modulus of the functional member 150 represents the highest tensile modulus of the layers that compose the functional member 150 .

[0065] The functional member 150 has a maximum dimension in the range of 300 mm to 3000 mm.

[0066] Here, "maximum dimension" refers to the longest dimension of the functional member 150, taking into account the gap 140. The maximum dimension of the functional member 150 can also be said to be the maximum dimension of the "functional member region" described below. For example, if the functional member 150 is a rectangular film, the "maximum dimension" refers to the length between the two most distant vertices of the rectangle. Also, if the functional member 150 is a circular film, the "maximum dimension" refers to the length obtained by adding the distance d to the diameter. For other shapes, the maximum dimension is determined in a similar manner.

[0067] The type of functional member 150 is not particularly limited. For example, the functional member 150 may be a display or a light-control film. The display may use a light-emitting diode (LED), an organic light-emitting diode (OLED), an inorganic EL, a laser, or the like. Below, an example in which the functional member 150 is a light-control film will be described, but the present invention is not limited to this.

[0068] FIG. 4 is a cross-sectional view that schematically shows an example of the configuration of a light control film that can be used in the laminated glass according to one embodiment of the present invention.

[0069] As shown in FIG. 4, this light control film 250 has a first resin layer 252, a first conductive layer 254, a light control element 256, a second conductive layer 258, and a second resin layer 260, in this order.

[0070] 4, the light control film 250 has electrodes electrically connected to the first conductive layer 254 and the second conductive layer 258. The light control element 256 can be driven by applying a voltage between the first conductive layer 254 and the second conductive layer 258 via the electrodes.

[0071] The first resin layer 252 is made of, for example, a transparent resin.

[0072] The first resin layer 252 may have at least one selected from the group consisting of, for example, polyethylene terephthalate (PET), polyethylene naphthalate, polyamide, polyether, polysulfone, polyethersulfone, polycarbonate, polyarylate, polyetherimide, polyetheretherketone, polyimide, aramid, polybutylene terephthalate, triacetyl cellulose, polyurethane, and cycloolefin polymer.

[0073] In particular, the first resin layer 252 preferably has at least one selected from the group consisting of polyethylene terephthalate, polycarbonate, and cycloolefin polymer, and more preferably is made of any one of these.

[0074] The thickness of the first resin layer 252 is, for example, in the range of 5 μm to 500 μm. The thickness of the first resin layer 252 is preferably in the range of 10 μm to 200 μm, and more preferably in the range of 50 μm to 150 μm.

[0075] The same can be said about the second resin layer 260 as about the first resin layer 252. Note that the second resin layer 260 may be made of a different material from the first resin layer 252 and / or may have a different thickness from the first resin layer 252.

[0076] The first conductive layer 254 may be made of, for example, a transparent conductive oxide (TCO).

[0077] Examples of TCO include tin-doped indium oxide (ITO), aluminum-doped zinc oxide (AZO), and indium-doped cadmium oxide.

[0078] Alternatively, the first conductive layer 254 may be made of a transparent conductive polymer such as poly(3,4-ethylenedioxythiophene: PEDOT) or poly(4,4-dioctylcyclopentadithiophene).

[0079] Alternatively, the first conductive layer 254 may be a laminated film of a metal layer and a dielectric layer, silver nanowires, a metal mesh of silver or copper, or the like.

[0080] The first conductive layer 254 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. Alternatively, the first conductive layer 254 may be formed by a chemical vapor deposition (CVD) method or a wet coating method.

[0081] The thickness of the first conductive layer 254 is not particularly limited, but may be in the range of 200 nm to 2 μm, for example.

[0082] The same is true for the second conductive layer 258 as for the first conductive layer 254, except that the second conductive layer 258 may be made of a different material and / or have a different thickness than the first conductive layer 254.

[0083] The dimming element 256 may be selected from the group consisting of, for example, a suspended particle device (SPD), a polymer dispersed liquid crystal (PDLC), a polymer network liquid crystal (PNLC), a guest-host liquid crystal, a photochromic, an electrochromic, and an electrokinetic.

[0084] A commercially available film may be used as the light control film 250. For example, a film using an SPD (LCF-1103DHA: Hitachi Chemical Co., Ltd.) may be used as the light control element 256.

[0085] When the light control film 250 is used as the functional component 150, the light transmittance of the first laminated glass 100 can be appropriately changed depending on the environment.

[0086] In the above description, it is assumed that the functional member 150 has a substantially rectangular planar shape in plan view. However, the planar shape of the functional member 150 is not necessarily limited to a rectangle. The functional member 150 may have, for example, a circular, elliptical, triangular, or n-sided (n is an integer of 5 or more) planar shape.

[0087] In the above description, it is assumed that each of the first functional component 150A and the second functional component 150B has two opposing surfaces and four side surfaces that are rectangular in planar shape.

[0088] Furthermore, the above description assumes that the first functional member 150A and the second functional member 150B are arranged such that one side surface (hereinafter referred to as the "first side surface") 171A of the first functional member 150A faces one side surface (hereinafter referred to as the "first side surface") 171B of the second functional member 150B in a substantially parallel relationship (see Figure 3).

[0089] In this case, the width W between the first side surface 171A of the first functional component 150A and the first side surface 171B of the second functional component 150B corresponds to the distance d. Therefore, in this case, the distance d can be defined over the area where the first side surface 171A of the first functional component 150A and the first side surface 171B of the second functional component 150B face each other in a plan view of the first laminated glass 100.

[0090] However, it should be noted that this embodiment is merely an example.

[0091] For example, when the first functional component 150A and the second functional component 150B both have circular planar shapes, there is only one section in the gap 140 between the two functional components 150A and 150B where the distance d can be determined. The same applies when the two functional components 150A and 150B have polygonal planar shapes and are arranged so that their vertices face each other.

[0092] Alternatively, when the functional member 150 includes three or more functional members, for example, when the functional member 150 is four rectangular functional members arranged two vertically and two horizontally, there may be only one section where the distance d can be defined. Also, there may be cases where the distance d can be defined for each of the two closest functional members.

[0093] However, even in such a case, it is clear that the effect of reducing residual bubbles as described above can be achieved as long as the distance d is 15 mm or more. Furthermore, if the functional component 150 includes three or more functional components and the distance d can be specified for each of the two closest functional components, the effect of reducing residual bubbles as described above can be achieved as long as the distance d is 15 mm or more for at least one of the distances d. However, it is preferable that all distances d satisfy the distance d is 15 mm or more.

[0094] (shielding layer 180) The shielding layer 180 is configured as, for example, an opaque layer, but it is sufficient if it can block visible light to an extent that at least the portion that needs to be hidden can be hidden. For example, the shielding layer 180 may be configured from organic ink, colored ceramics, or the like. The shielding layer 180 may be any color, but dark colors such as black, brown, gray, and dark blue are preferred, and black is more preferred.

[0095] The thickness of the shielding layer 180 is not particularly limited, but may be, for example, in the range of 1 μm to 30 μm, and preferably 5 μm to 20 μm.

[0096] In the example shown in FIGS. 1 to 3 , the shielding layer 180 is provided on the first side 102 of the first laminated glass 100. Specifically, it is provided on the second surface 114 of the first glass substrate 110. However, this is merely an example, and the shielding layer 180 may also be provided on the first surface 122 of the second glass substrate 120. Alternatively, the shielding layer 180 may be provided on both the second surface 114 of the first glass substrate 110 and the first surface 122 of the second glass substrate 120.

[0097] When the first laminated glass 100 is used with the first side 102 facing indoors (inside the vehicle) and the second side 104 facing outdoors (outside the vehicle), providing the shielding layer 180 on the first surface 122 and / or the second surface 114 can prevent the urethane resin used to bond the first laminated glass 100 to the vehicle from deteriorating due to ultraviolet rays, etc.

[0098] Furthermore, by providing the shielding layer 180 on the second surface 114 and / or the first surface 122, various wiring and the like installed on the periphery of the first laminated glass 100 can be made less visible from the outside.

[0099] When the functional member 150 has a rectangular planar shape, at least one of the functional members 150 may be arranged so that at least one side is covered with the shielding layer 180 in a plan view. This makes it difficult to visually recognize the boundaries of the functional members 150. For example, in the example shown in FIG. 1, all sides of the first functional member 150A except for one long side (the side corresponding to the first side surface 171A) are covered with the shielding layer 180 in a plan view. The same applies to the second functional member 150B.

[0100] (First laminated glass 100) The first laminated glass 100 having the above-described characteristics can be used, for example, as a glass member for a vehicle, such as a windshield, a rear glass, other installed window glass, a side glass, or a roof glass.

[0101] When the first laminated glass 100 is used as a glass member for a vehicle, the first laminated glass 100 may be applied so that the first side 102 faces the interior side of the vehicle and the second side 104 faces the exterior side of the vehicle.

[0102] As mentioned above, the first laminated glass 100 may have either a flat shape or a curved shape.

[0103] When the first laminated glass 100 has a curved surface, among cross sections including a normal to the center of gravity of the second surface 124 of the second glass substrate 120, the cross section in which the radius of curvature of the second surface 124 is smallest is referred to as the longitudinal cross section. Furthermore, the direction in which the longitudinal cross section extends when viewed from the normal direction is referred to as the first direction, and the direction perpendicular to the first direction is referred to as the second direction.

[0104] For example, in Fig. 1, the first direction may be the X direction and the second direction may be the Y direction. The first direction and the second direction can be defined even if the first laminated glass 100 is a single-bend glass.

[0105] Furthermore, when the first laminated glass 100 is viewed in plan, the first functional component 150A, the second functional component 150B, and the gaps 140 therebetween are collectively referred to as the functional component region. When the first laminated glass 100 includes three or more functional components, when the first laminated glass 100 is viewed in plan, the three or more functional components and their respective gaps 140 are collectively referred to as the functional component region.

[0106] When the first laminated glass 100 is viewed from above, the portion including the first functional component 150A is also referred to as a first functional component region, and the portion including the second functional component 150B is also referred to as a second functional component region.

[0107] For example, in FIG. 1, the functional component region is the region enclosed when the sides (broken lines) constituting the peripheries of the first functional component 150A and the second functional component 150B are extended in their respective directions.

[0108] The present inventors have discovered that in the first laminated glass 100, when a specific relationship holds between the radius of curvature of the second glass substrate 120 and the dimensions of the functional member region, i.e., when the following equation (1) holds, wrinkles in the functional member 150 can be significantly prevented.

number

[0109] The radius of curvature can be measured by evaluating the shape at three points, for example, using a dial gauge. The spacing between the three points can be selected from any predetermined value between 10 mm and 150 mm. For example, measurements can be taken so that the spacing between the center points of three points spaced 100 mm apart is 50 mm.

[0110] Furthermore, in equation (1), Lx is the maximum length (unit: mm) of the functional material region in the first direction along the surface direction, and Ly is the maximum length (unit: mm) of the functional material region in the second direction along the surface direction.

[0111] When the above formula (1) is satisfied, wrinkles in the functional component 150 can be more effectively suppressed. The value of formula (1) is preferably smaller than 2100, and more preferably smaller than 1750. In these cases, wrinkles in the functional component 150 can be more effectively suppressed. Formula (1) can approximately express the influence of both the degree of bending in the first direction and the degree of bending in the second direction of the first laminated glass 100 having a three-dimensional curved surface shape.

[0112] Furthermore, the inventors of the present application have discovered that in the first laminated glass 100, when a specific relationship holds between the shape of the first glass substrate 110 in the encapsulation area of ​​the first functional member 150A and the dimensions of the first functional member 150A, that is, when the following equation (2) holds for the first functional member area of ​​the first glass substrate 110, wrinkles in the first functional member 150A can be significantly prevented.

number

[0113] In the first functional member region on the second surface 114 of the first glass substrate 110, an imaginary line S is drawn extending in the first direction and perpendicular to a pair of sides of the first functional member region extending in the second direction. Next, a perpendicular line is drawn from the imaginary line S toward the first glass substrate 110 (second surface 114). The maximum length of the perpendicular line is defined as Dx. Note that the length of the perpendicular line varies depending on how the imaginary line S is drawn, but the maximum length Dx refers to the longest of those different lengths of perpendicular lines. Dy is determined in the same manner as Dx, after drawing an imaginary line S extending in the second direction and perpendicular to a pair of sides of the first functional member region extending in the first direction in the first functional member region on the second surface 114 of the first glass substrate 110.

[0114] In addition, in formula (2), Lx0 is the maximum length (unit: mm) of the first functional member region in the first direction along the direction of the second surface 114, and Ly0 is the maximum length (unit: mm) of the first functional member region in the second direction along the direction of the second surface 114. Lx0 and Ly0 are determined by measuring the second surface 124 in the first functional member region of the second glass substrate 120 along the first direction and the second direction, respectively.

[0115] When the above formula (2) is satisfied for the first functional component 150A, wrinkles in the first functional component 150A can be more effectively suppressed. The value of the left side of formula (2) is preferably 4.5 or less, more preferably 4.0 or less, and even more preferably 3.5 or less. Formula (2) can approximately express the effects of both the degree of curvature in the first direction and the degree of curvature in the second direction of the first laminated glass 100 having a three-dimensional curved surface shape.

[0116] Similarly, the above formula (2) can also be applied to the second functional member 150B. That is, when formula (2) is satisfied with respect to the maximum bending depth of the first glass substrate 110 and the dimensions of the second functional member 150B, wrinkles in the second functional member 150B can be significantly prevented. When formula (2) is applied to the second functional member 150B, the first functional member 150A can be read as the second functional member 150B. It is preferable that formula (2) be satisfied for at least one of the first functional member 150A and the second functional member 150B, and more preferably for both.

[0117] When the first laminated glass 100 includes three or more functional members, the above formula (2) may be applied even if any two of the functional members are the first functional member 150A and the second functional member 150B. However, it is most preferable that the above formula (2) be applied regardless of whether either the first functional member 150A or the second functional member 150B is used.

[0118] (Method of manufacturing laminated glass according to one embodiment of the present invention) Next, an example of a method for producing laminated glass according to one embodiment of the present invention will be described with reference to FIG.

[0119] FIG. 5 shows a schematic flow of a method for producing laminated glass according to one embodiment of the present invention.

[0120] As shown in FIG. 5, a method for producing laminated glass according to one embodiment of the present invention includes the following steps: (1) a step of preparing a first glass substrate and a second glass substrate (step S110); (2) a step of laminating a first glass substrate, a first interlayer film, a functional component, a second interlayer film, and a second glass substrate in this order to form an assembly (step S120); and (3) a step of bonding the assembly by heat treatment (step S130). It has.

[0121] Each step will be explained below. For clarity, the manufacturing method will be explained using the first laminated glass 100 as an example. Therefore, the reference symbols shown in Figures 1 to 3 will be used to represent each component.

[0122] (Step S110) First, a first glass substrate 110 and a second glass substrate 120 are prepared.

[0123] If necessary, the shielding layer 180 may be provided in a frame shape along the periphery of one surface (e.g., the second surface 114) of the first glass substrate 110. The shielding layer 180 may be formed, for example, by applying a paste for the shielding layer 180 to the periphery of the second surface 114 of the first glass substrate 110 and then firing the paste. Any conventional method, such as a screen printing method, may be used to apply the paste.

[0124] If necessary, another shielding layer may be provided in a frame shape along the periphery of one surface (for example, the first surface 122) of the second glass substrate 120.

[0125] Furthermore, if necessary, bending processing may be performed on the first glass substrate 110 and / or the second glass substrate 120. For example, bending processing may be performed on only the second glass substrate 120. In this case, the first glass substrate 110 can be laminated with the second glass substrate 120 while the first glass substrate 110 is in a flat shape to produce a laminated glass.

[0126] The bending process may be gravity forming, press forming, or the like. The bending process may also be performed while the first glass substrate 110 and the second glass substrate 120 are heated. The glass substrates 110 and 120 may be bent separately or simultaneously. The heating temperature varies depending on the type of glass substrate, but is, for example, in the range of 550°C to 700°C.

[0127] When paste for the shielding layer 180 is applied to the first glass substrate 110, the paste may be fired by this bending process to form the shielding layer 180. Alternatively, the paste may be pre-fired before the bending process.

[0128] (Process S120) Next, a first resin sheet for the first interlayer film 130 is placed on the first surface 112 of the first glass substrate 110 .

[0129] Next, two or more functional members 150 are placed on the first resin sheet.

[0130] The functional components 150A and 150B may be, for example, a light management film 250.

[0131] The functional members 150 are arranged spaced apart from each other along the planar direction of the first surface 112 of the first glass substrate 110. The two functional members 150 are arranged such that the distance d between the two functional members 150 is 15 mm or more.

[0132] Next, a second resin sheet for the second interlayer film 136 is placed on the functional component 150. The second resin sheet may be made of the same resin as the first resin sheet.

[0133] If necessary, a third resin sheet for a third interlayer may be placed on the periphery of the first surface 112 of the first glass substrate 110. The third resin sheet may also be placed before the placement of each functional component 150. This makes it easier to align the placement positions of each functional component 150.

[0134] Next, a second glass substrate 120 is placed on the second resin sheet to form an assembly.

[0135] (Step S130) Next, the assembly is placed in a container, and the pressure inside the container is reduced to, for example, 730 mmHg or less, and then the container is heated to a temperature in the range of 70 to 110°C while being sealed.

[0136] Instead of placing the assembly in a container and reducing the pressure, the assembly may be clamped between a pair of nip rollers and pressurized, or the periphery of the assembly may be covered with a rubber channel and reduced in pressure, and heated to a temperature in the range of 70 to 110°C.

[0137] The heating softens the first resin sheet, forming a first interlayer film 130. The second resin sheet also softens, forming a second interlayer film 136. Therefore, the first glass substrate 110 and the functional member 150 are bonded together via the first interlayer film 130, and the second glass substrate 120 and the functional member 150 are bonded together via the second interlayer film 136.

[0138] The gap 140 between the first functional component 150A and the second functional component 150B is filled with components of the first resin sheet and / or the second resin sheet that have entered the gap 140 due to softening.

[0139] Therefore, after the heat treatment, the gap 140 is filled with the first intermediate film 130 and / or the second intermediate film 136. Furthermore, in the gap 140, the first intermediate film 130 and the second intermediate film 136 are directly bonded to each other.

[0140] Through the above steps, the first laminated glass 100 as shown in FIGS. 1 to 3 can be produced.

[0141] It should be noted that the above description is merely an example, and the laminated glass according to one embodiment of the present invention may be manufactured by other methods. [Example]

[0142] Examples of the present invention will be described below, with Examples 1 to 10 being examples, and Examples 11 to 14 being comparative examples.

[0143] (Example 1) A laminated glass was produced by the following method. The laminated glass had a configuration in which a first glass substrate, a first interlayer film, a functional component, a second interlayer film, and a second glass substrate were arranged in this order. The laminated glass had a flat shape. No shielding layer was provided.

[0144] First, first and second glass substrates were prepared, each measuring 300 mm in length, 300 mm in width, and 2 mm in thickness.

[0145] Next, a first resin sheet for the first interlayer was placed on the first glass substrate. The first resin sheet was positioned so that it was roughly flush with the first surface of the first glass substrate in plan view. A 0.4 mm thick ethylene-vinyl acetate copolymer (EVA) sheet (Mersen G7055, manufactured by Tosoh-Nikkemi Corporation) was used as the first resin sheet.

[0146] Next, two functional members were placed on the first resin sheet, aligned with each other along the plane of the first surface of the first glass substrate. The functional members were square PET films measuring 80 mm in length and 80 mm in width. The PET films had a thickness of 100 μm. Each PET film was placed approximately in the center of the first resin sheet, with the bottom edge of the PET film approximately parallel to the bottom edge of the first glass substrate.

[0147] In plan view, the width W of the gap between the two PET films was set to 20 mm.

[0148] Next, a second resin sheet for a second interlayer was placed on top of these PET films. The second resin sheet was the same as the first resin sheet. The second resin sheet had the same dimensions as the first resin sheet and was placed so that it matched the first resin sheet in plan view.

[0149] Next, a second glass substrate was placed on the second resin sheet so that each side of the second glass substrate coincided with each side of the first glass substrate in plan view, thereby forming an assembly.

[0150] The resulting assembly was placed in a plastic container, and the pressure inside the container was reduced to 730 mmHg for 5 minutes, after which the container was sealed and heated to 100°C and maintained at that temperature for 1 hour.

[0151] As a result, a laminated glass (hereinafter referred to as "Sample 1") was produced.

[0152] (Example 2) A laminated glass was produced in the same manner as in Example 1. However, in this Example 2, the width W of the gap between the two functional components was set to 30 mm. The other conditions were the same as in Example 1. In this way, a laminated glass (hereinafter referred to as "Sample 2") was produced.

[0153] (Example 3) A laminated glass was produced in the same manner as in Example 1. However, in this Example 3, the width W of the gap between the two functional components was set to 60 mm. The other conditions were the same as in Example 1. In this way, a laminated glass (hereinafter referred to as "Sample 3") was produced.

[0154] (Example 4) A laminated glass was produced in the same manner as in Example 1. However, in this Example 4, the width W of the gap between the two functional components was set to 100 mm. The other conditions were the same as in Example 1. In this way, a laminated glass (hereinafter referred to as "Sample 4") was produced.

[0155] (Example 5) A laminated glass was produced in the same manner as in Example 1. However, in this Example 5, the width W of the gap between the two functional components was set to 120 mm. The other conditions were the same as in Example 1. In this way, a laminated glass (hereinafter referred to as "Sample 5") was produced.

[0156] (Example 6) A laminated glass was produced in the same manner as in Example 1. However, in this Example 6, two 125 μm-thick PET films were used as each functional member. Therefore, the thickness of each functional member was 250 μm. The other conditions were the same as in Example 1. In this way, a laminated glass (hereinafter referred to as "Sample 6") was produced.

[0157] (Example 7) A laminated glass was produced in the same manner as in Example 6. However, in this Example 7, the width W of the gap between the two functional components was set to 100 mm. The other conditions were the same as in Example 6. In this way, a laminated glass (hereinafter referred to as "Sample 7") was produced.

[0158] (Example 8) A laminated glass was produced in the same manner as in Example 6. However, in this Example 8, the width W of the gap between the two functional components was set to 120 mm. The other conditions were the same as in Example 6. In this way, a laminated glass (hereinafter referred to as "Sample 8") was produced.

[0159] (Example 9) Laminated glass was produced by the following method. The laminated glass had a configuration in which a first glass substrate, a first interlayer film, a functional component, a second interlayer film, and a second glass substrate were arranged in this order. In Example 9, the laminated glass was formed into a complex curved shape. No shielding layer was provided.

[0160] First, curved first and second glass substrates were prepared. The dimensions of both the first and second glass substrates were 300 mm in length, 300 mm in width, and 2 mm in thickness. The lengths in the length and width directions were measured along the main surfaces of the curved first and second glass substrates. The three-dimensional shapes of the first and second glass substrates were approximately the same.

[0161] Next, a first resin sheet for the first interlayer was placed on the first glass substrate. The first resin sheet was positioned so that it was roughly flush with the first surface of the first glass substrate in plan view. A 0.4 mm thick ethylene-vinyl acetate copolymer (EVA) sheet (Mersen G7055, manufactured by Tosoh-Nikkemi Corporation) was used as the first resin sheet.

[0162] Next, two functional members were placed on the first resin sheet, aligned along the plane of the first surface of the first glass substrate. The functional members were rectangular PET films measuring 125 mm in length and 280 mm in width. The PET films were 250 μm thick. Each PET film was arranged symmetrically on the first resin sheet, with the bottom edge of the PET film approximately parallel to the bottom edge of the first glass substrate. At this time, the distance from the periphery of the first glass substrate and the second glass substrate to the two functional members (PET films) was 10 mm.

[0163] In plan view, the width W of the gap between the two PET films was set to 30 mm.

[0164] Next, a second resin sheet for a second interlayer was placed on top of these PET films. The second resin sheet was the same as the first resin sheet. The second resin sheet had the same dimensions as the first resin sheet and was placed so that it matched the first resin sheet in plan view.

[0165] Next, a second glass substrate was placed on the second resin sheet so that each side of the second glass substrate coincided with each side of the first glass substrate in plan view, thereby forming an assembly.

[0166] The resulting assembly was placed in a plastic container, and the pressure inside the container was reduced to 730 mmHg for 5 minutes, after which the container was sealed and heated to 100°C and maintained at that temperature for 1 hour.

[0167] As a result, a laminated glass (hereinafter referred to as "Sample 9") was produced.

[0168] (Example 10) A laminated glass was produced in the same manner as in Example 9. However, in Example 10, first and second glass substrates were prepared with a curved shape different from that in Example 9. However, the dimensions of the first and second glass substrates (length 300 mm, width 300 mm, thickness 2 mm) and other conditions were the same as in Example 9. In this way, a laminated glass (hereinafter referred to as "Sample 10") was produced.

[0169] (Example 11) A laminated glass was produced in the same manner as in Example 1. However, in this Example 11, the width W of the gap between the two functional components was set to 10 mm. The other conditions were the same as in Example 1. In this way, a laminated glass (hereinafter referred to as "Sample 11") was produced.

[0170] (Example 12) A laminated glass was produced in the same manner as in Example 6. However, in this Example 12, the width W of the gap between the two functional components was set to 10 mm. The other conditions were the same as in Example 6. In this way, a laminated glass (hereinafter referred to as "Sample 12") was produced.

[0171] (Example 13) A laminated glass was produced in the same manner as in Example 9. However, in Example 13, first and second glass substrates with a curved shape different from that in Example 9 were prepared. The two functional members were both rectangular PET films measuring 135 mm in length, 280 mm in width, and 250 μm in thickness, and the width W of the gap between the two PET films in a plan view was 10 mm. The dimensions of the first and second glass substrates (300 mm in length, 300 mm in width, 2 mm in thickness) and other conditions were the same as in Example 9. In this way, a laminated glass (hereinafter referred to as "Sample 13") was produced.

[0172] (Example 14) A laminated glass was produced in the same manner as in Example 13. However, in Example 14, first and second glass substrates were prepared with a curved shape different from that in Example 13. However, the dimensions of the first and second glass substrates (length 300 mm, width 300 mm, thickness 2 mm) and other conditions were the same as in Example 13. In this way, a laminated glass (hereinafter referred to as "Sample 14") was produced.

[0173] (evaluation) The following evaluations were carried out using each sample. Note that for Samples 9, 10, 13, and 14, predetermined dimensions were also measured.

[0174] (amount of residual bubbles) In each sample, the amount of bubbles present in the gap between the two functional members was visually evaluated in plan view from the second glass substrate side.

[0175] The total area of ​​residual bubbles is 5mm 2 If the total area of ​​the residual bubbles is less than 5 mm, the residual bubbles are evaluated as "Good." 2 ~15mm 2 In the case where the total area of ​​the residual bubbles is 15 mm, the residual bubbles amount is judged as "△". 2 If the residual bubble amount exceeded this, it was judged as "×".

[0176] (Distortion of reflected image) A zebra board was placed on the second glass substrate side of each sample, and the distortion of the image reflected from the sample was evaluated. If no clear distortion was observed in the reflected image, it was judged as "Good." If clear distortion was observed in the reflected image, it was judged as "Poor." If the result was somewhere between "Good" and "Poor," it was judged as "Good."

[0177] Tables 1 and 2 summarize the results obtained for each sample.

[0178] [Table 1]

[0179] [Table 2]

[0180] As shown in Tables 1 and 2, it was found that many bubbles remained in the gap between the two functional components in Samples 11 to 14. In contrast, it was found that the bubbles remaining in the gap were significantly suppressed in Samples 1 to 10, regardless of the thickness of the functional components.

[0181] In addition, in Samples 5 and 8, where the gap width between the two functional components was 120 mm, the distortion of the reflected image was greater than in Samples 1 to 4 and Samples 6 and 7. This is thought to be because in Samples 5 and 8, the gap width W was relatively wide, which reduced the uniformity of the thickness of the laminated glass.

[0182] Therefore, from the viewpoint of suppressing distortion of the reflected image, it is preferable that the width W of the gap is less than 120 mm, for example, 110 mm or less. The entire contents of the specification, claims, drawings and abstract of Japanese Patent Application No. 2020-067824, filed on April 3, 2020, are hereby incorporated by reference as the disclosure of the specification of the present invention. [Explanation of symbols]

[0183] 100 First laminated glass 102 First Side 104 Second Side 110 First glass substrate 112 First Surface B 114 Second Surface B 120 Second glass substrate 122 First Surface A 124 Second Surface A 130 First Interlayer 136 Second Interlayer 140 Gap 150 Functional Components 150A First functional member 150B Second functional member 171A First side of first functional member 171B First side of second functional member 180 Shielding layer 250 Light Control Film 252 First resin layer 254 First conductive layer 256 dimming element 258 Second Conductive Layer 260 Second resin layer

Claims

1. A laminated glass in which a first glass substrate and a second glass substrate are laminated together, a first intermediate film disposed between the first glass substrate and the second glass substrate and in contact with the first glass substrate; a second interlayer film disposed between the first glass substrate and the second glass substrate and in contact with the second glass substrate; first and second functional members disposed between the first interlayer film and the second interlayer film and in contact with the first interlayer film and the second interlayer film; and the first and second functional components have higher rigidity than the first and second interlayer films; the first and second functional components are arranged to be spaced apart by a distance d when the laminated glass is viewed in plan; The distance d is 15 mm or more, the first and second functional components are each a light management film; The light control film has, in order from the first glass substrate to the nearest, a first resin layer, a first conductive layer, a light control element, a second conductive layer, and a second resin layer.

2. The laminated glass according to claim 1 , wherein the distance d is 20 mm or more.

3. The laminated glass according to claim 1 or 2, wherein the distance d is 110 mm or less.

4. The laminated glass according to claim 3 , wherein the distance d is 100 mm or less.

5. 5. The laminated glass according to claim 1, wherein the first interlayer film and the second interlayer film are in direct contact with each other in a region where the first and second functional components are spaced apart from each other.

6. The laminated glass according to claim 1 , wherein the first and second functional components each have a thickness of 50 μm or more and 250 μm or less.

7. the first and second functional components each have the form of a rectangular film; 7. The laminated glass according to claim 1, wherein the first and second functional components are arranged such that a first side surface of the first functional component faces a first side surface of the second functional component in a substantially parallel relationship.

8. 8. The laminated glass according to claim 1, wherein the first and / or second functional component has a resin layer, and the resin layer comprises at least one 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.

9. 9. The laminated glass according to claim 1, wherein the first and second functional components are composed of one or more layers, and the maximum value of the tensile modulus of each layer is 1 GPa or more.

10. In the second glass substrate, a surface in contact with the second interlayer film is referred to as a first surface A, and a surface not in contact with the second interlayer film is referred to as a second surface A; In the second glass substrate, when the laminated glass is viewed in plan, a region including the first and second functional members and a gap between the first and second functional members is referred to as a functional member region, In the second glass substrate, a cross section including a normal line at the center of gravity, in which the radius of curvature of the second surface A is smallest, is referred to as a longitudinal cross section, When the direction in which the longitudinal cross section extends when viewed from the normal direction is defined as a first direction, and the direction perpendicular to the first direction is defined as a second direction, The laminated glass according to any one of claims 1 to 9, wherein the following formula (1) is satisfied: [Equation 1] however, Rx is an average value [mm] of the radius of curvature measured every 50 mm along the first direction on the second surface A in the functional component region of the second glass substrate, Ry is the average value [mm] of the radius of curvature measured every 50 mm along the second direction on the second surface A in the functional component region of the second glass substrate, Lx is the maximum length [mm] of the functional component region in the first direction, Ly is the maximum length [mm] of the functional component region in the second direction.

11. The laminated glass according to claim 10, wherein the maximum dimension of the functional component region is 300 mm or more and 3000 mm or less.

12. In the second glass substrate, a surface in contact with the second interlayer film is referred to as a first surface A, and a surface not in contact with the second interlayer film is referred to as a second surface A; In the first glass substrate, a surface in contact with the first interlayer film is referred to as a first surface B, and a surface not in contact with the first interlayer film is referred to as a second surface B, In the second glass substrate, a region overlapping with the first functional component when the laminated glass is viewed in plan is referred to as a first functional component region, In the second glass substrate, among cross sections including a normal line at the center of gravity, a cross section in which the radius of curvature of the second surface A of the second glass substrate is smallest is referred to as a longitudinal cross section, When the direction in which the longitudinal cross section extends when viewed from the normal direction is defined as a first direction, and the direction perpendicular to the first direction is defined as a second direction, The laminated glass according to any one of claims 1 to 11, wherein the following formula (2) is satisfied: [Equation 2] however, Dx is the maximum bending depth [mm] of the first glass substrate in the first direction in the first functional component region, Dy is the maximum bending depth [mm] of the first glass substrate in the second direction in the first functional member region. Lx0 is the maximum length [mm] of the first functional component region in the first direction along the second surface B, Ly0 is the maximum length [mm] of the first functional component region in the second direction along the second surface B.

13. In the second glass substrate, a region overlapping with the second functional component when the laminated glass is viewed in plan is referred to as a second functional component region, The laminated glass according to claim 12, wherein the formula (2) also holds true for the second functional component region: however, Dx is the maximum bending depth [mm] of the first glass substrate in the first direction in the first functional member region or the second functional member region, Dy is the maximum bending depth [mm] of the first glass substrate in the second direction in the first functional member region or the second functional member region. Lx0 is the maximum length [mm] of the first functional member region or the second functional member region in the first direction along the second surface B, Ly0 is the maximum length [mm] of the first functional member region or the second functional member region in the second direction along the second surface B.

14. When viewed from the second glass substrate side, the total area of ​​bubbles present in the gap between the first and second functional components is 5 mm ２ The laminated glass according to claim 1 , wherein the thickness is less than 1 / 2 mm.

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