Laminated glass for vehicles

Abstract

The present invention provides a laminated glass for vehicles that is easy to wire even when multiple power feeders extend outside the laminated glass. In order to solve the above-mentioned problems, the laminated glass for vehicles of the present invention is a laminated glass for vehicles formed by sequentially stacking a first glass plate, a first intermediate film, a second intermediate film, and a second glass plate, wherein a first functional component, a second functional component, a first power feeder electrically connected to the first functional component, and a second power feeder electrically connected to the second functional component are provided between the first intermediate film and the second intermediate film, and when the first glass plate is viewed from above, the periphery of the first functional component and the second functional component exists on the inner side than the periphery of the first glass plate, and the first power feeder and the second power feeder only intersect with a power feed edge that is one side of the first glass plate and do not overlap within the surface of the first glass plate.

Description

Technical Field

[0001] The present invention relates to laminated glass for vehicles. Background Art

[0002] Conventionally, laminated glass used in vehicles is known to have a layer having various functions disposed between one glass and another glass and driven by an external power supply to realize the function so that the layer performs the desired function (eg Patent Document 1).

[0003] The vehicle window glass of Patent Document 1 has a coating as a layer between the outer glass and the inner glass, and the coating has a heating function. In particular, in order to exert the heating function, the vehicle window glass of Patent Document 1 has an electrically heatable coating and a current conductor provided for electrically connecting the two electrodes of a voltage source, and the current conductor is connected to a wire leading to the outside.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent No. 6545376 Summary of the invention

[0007] Technical problem to be solved by the invention

[0008] However, in recent years, laminated glass is required to be provided with multiple functional components such as dimming components or image display components that require power supply from the outside of the laminated glass. When multiple functional components are provided inside the laminated glass, multiple power supply bodies extending from the outside to the inside of the laminated glass need to be connected according to the number of functional components.

[0009] The vehicle window glass of Patent Document 1 discloses a form in which a plurality of power supply wires (power supply bodies) connected to a conductive coating capable of being heated are separated from the outside to current conductors located at the upper side and the lower side inside the glass. However, in this case, the wires connected to the vehicle window glass need to be routed from the upper side inside the glass to the current conductor at the lower side outside the glass in a manner that bypasses along the vehicle body frame or the periphery of the glass. In addition, when the plurality of power supply bodies exposed from the inside of the glass to the outside of the glass are spaced far apart from each other, it is difficult to bundle the cables connecting the power supply bodies to the power source mounted on the vehicle, and thus there is a problem that the number of components for fixing the cables so that they do not shake increases.

[0010] The present invention has been made based on the above-mentioned problems, and provides a laminated glass for a vehicle that can be easily wired even when a plurality of power feeders protrude outside the laminated glass.

[0011] Technical solutions adopted to solve technical problems

[0012] A laminated glass for a vehicle according to one embodiment of the present disclosure is a laminated glass for a vehicle formed by laminating a first glass plate, an intermediate film, and a second glass plate in sequence, wherein the intermediate film comprises a first intermediate film and a second intermediate film, and a first functional component, a second functional component, a first power supply electrically connected to the first functional component, and a second power supply electrically connected to the second functional component are provided between the first intermediate film and the second intermediate film, and when the first glass plate is viewed from above, the first functional component and the second functional component are arranged on the inner side than the periphery of the first glass plate, and the first power supply and the second power supply only intersect with a power supply edge which is one side of the first glass plate and do not overlap within the plane of the first glass plate.

[0013] In addition, a method for manufacturing a laminated glass for a vehicle according to an embodiment of the present disclosure is a method for manufacturing a laminated glass for a vehicle in which a first glass plate, an intermediate film, and a second glass plate are sequentially laminated, and the method comprises: a lamination step of preparing a laminate having the first glass plate, the intermediate film, a first functional component connected to a first power supply, a second functional component connected to a second power supply, and the second glass plate; and a first pressing step of heating and pressurizing the laminate for pressing, wherein the intermediate film comprises a first intermediate film and a second intermediate film. The lamination process includes a process in which a first functional component electrically connected to a first power supply body and a second functional component electrically connected to a second power supply body are located between a first intermediate film and a second intermediate film, and when the first glass plate is viewed from above, the first power supply body and the second power supply body only intersect with a power supply edge which is one side of the first glass plate and the first power supply body and the second power supply body do not overlap within the plane of the first glass plate. In the lamination process, when the first glass plate is observed from a cross-sectional perspective including the power supply edge, the following equations (1) and (2) are satisfied.

[0014] Formula (1): t i ≥0.8×(t F1 +t iF1 )

[0015] Formula (2): t i ≥0.8×(t F2 +t iF2 )

[0016] t i : The thickness of the intermediate film between the first power supply body and the second power supply body in the plane direction

[0017] t F1 : Thickness of the thickest part of the first power supply body

[0018] t F2 : Thickness of the thickest part of the second power supply body

[0019] t iF1 : The thickness of the intermediate film at the portion overlapping with the first power supply body

[0020] t iF2 : The thickness of the intermediate film overlapping with the second power supply body

[0021] Effects of the Invention

[0022] According to one embodiment of the present disclosure, a laminated glass for a vehicle can be provided in which a plurality of functional components have good functions and a high degree of freedom in wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 1 is a plan view of a laminated glass for a vehicle according to a first embodiment of the present invention.

[0024] Figure 2 A cross-sectional view of the laminated glass for a vehicle according to the first embodiment is shown.

[0025] Figure 3 A side view of the laminated glass for a vehicle according to the first embodiment is shown.

[0026] Figure 4 A side view of a laminated glass for a vehicle according to a second embodiment of the present invention is shown.

[0027] Figure 5 A side view of a laminated glass for a vehicle according to a third embodiment of the present invention is shown.

[0028] Figure 6 1 is a plan view of a laminated glass for a vehicle according to a fourth embodiment of the present invention.

[0029] Figure 7 A cross-sectional view of a laminated glass for a vehicle according to a fourth embodiment is shown.

[0030] Figure 8 A side view of a laminated glass for a vehicle according to a fourth embodiment is shown.

[0031] Fig. 9 A cross-sectional view of a laminated glass for a vehicle according to a fifth embodiment of the present invention is shown.

[0032] Fig.10 A side view of a laminated glass for a vehicle according to a fifth embodiment is shown.

[0033] Fig.11 middle, Fig.11 (a) shows a side view of the stacked body, Fig.11 (b) shows Fig.11 (a) is a diagram showing the extracted dotted line portion. Fig.11 (c) shows Fig.11 (a) and Fig.11 (b) is an enlarged view of the vicinity of the current feeder. DETAILED DESCRIPTION

[0034] In this specification, the expressions "upper" and "lower" refer to the upper and lower parts of the laminated glass for vehicles when it is mounted on the vehicle. The "side" of the laminated glass for vehicles refers to the part connecting the upper side and the lower side. "Section" refers to the incision when the laminated glass for vehicles is cut in the thickness direction or the side of the laminated glass for vehicles. In addition, the side is not a term that limits the surface that only includes the side. In addition, in this specification, the "periphery" refers to the outermost edge of the prescribed component, and the "peripheral portion" refers to the vicinity of the "periphery". In the case where the prescribed component has a hollow portion, the "periphery" is also called the "outer edge", which is sometimes distinguished from the "inner edge" which is the edge of the outer periphery of the hollow portion.

[0035] In this specification, "same shape" and "same size" mean that they have the same shape and size as seen by the human eye. Also, unless otherwise specified, "approximately" means that they are the same as seen by the human eye. In addition, "to" indicating a numerical range includes upper and lower limits.

[0036] The laminated glass for a vehicle according to the embodiment of the present invention can be applied to, for example, a windshield, a rear window, a side window, a sunroof, a triangular window, etc. The laminated glass for a vehicle is hereinafter also simply referred to as "laminated glass".

[0037] Several embodiments of the present invention are described below using the accompanying drawings. In each of the drawings, in order to make each component easier to see, the size ratios of each component are different, and a curved shape is also shown as a flat shape.

[0038] (First embodiment)

[0039] Below, using Figure 1 to Figure 3 A first embodiment of the present invention will be described. Figure 1 It is a plan view of a laminated glass for a vehicle according to a first embodiment of the present invention, and is also a plan view of a second embodiment and a third embodiment of the present invention described later.

[0040] The laminated glass 100 for vehicles of the present embodiment includes a first glass plate 10 having main surfaces of the same shape, a second glass plate 18, and an intermediate film 20 disposed therebetween. Thus, the first glass plate 10, the intermediate film 20, and the second glass plate 18 are stacked in this order. In addition, the central axis (not shown) of the laminated glass 100 for vehicles is an imaginary line in the thickness direction passing through the center of gravity G of the laminated glass 100 for vehicles.

[0041] like Figure 1 As shown, the laminated glass 100 for a vehicle is substantially trapezoidal in plan view, but is not limited thereto. Depending on the position of the vehicle to be mounted, the laminated glass 100 for a vehicle may also be, for example, substantially triangular or substantially rectangular in plan view.

[0042] In addition, looking down at the laminated glass 100 for a vehicle or looking down at the first glass plate 10 means placing the laminated glass 100 for a vehicle on a horizontal plane with the first glass plate 10 facing upward and observing the horizontal plane from vertically above. In addition, observing from a cross-sectional perspective means observing a predetermined cross-section of the laminated glass for a vehicle from a vertical direction. Furthermore, side view means observing a predetermined side surface of the laminated glass for a vehicle (for example, a side surface including the power supply side 10s) from a vertical direction.

[0043] In addition, at least a portion of the cross section of the laminated glass 100 for a vehicle in the vertical direction may be a substantially wedge-shaped shape with a gradually decreasing thickness. Laminated glass having a wedge-shaped cross section in the vertical direction in which at least a portion of the thickness increases from the bottom to the top is suitable for functioning as a head-up display (HUD), and can be particularly suitable for use as a windshield. In order for the laminated glass 100 for a vehicle to have such a cross section, at least a portion of the cross section in the vertical direction of at least one of the first glass plate 10, the second glass plate 18, and the intermediate film 20 may be substantially wedge-shaped.

[0044] like Figure 1 As shown, the laminated glass 100 for vehicles of the present embodiment includes a first functional component 14 and a second functional component 15 inside the intermediate film 20. When the first glass plate 10 is viewed from above, the first functional component 14 and the second functional component 15 do not overlap. That is, when the first glass plate 10 is viewed from above, the first functional component 14 and the second functional component 15 are separated. Moreover, the peripheries of the two functional components 14 and 15 are both present on the inner side than the periphery of the first glass plate 10. Herein, "inner side" means the direction of the central axis passing through the center of gravity G of the laminated glass 100 for vehicles when viewed from the periphery of a predetermined component (here, the first glass plate 10). On the contrary, "outer side" means the direction of the periphery of a predetermined component (here, the first glass plate 10) when viewed from the central axis passing through the center of gravity G of the laminated glass 100 for vehicles.

[0045] Hereinafter, the first power supply 16 and the second power supply 17 are also simply collectively referred to as "power supplies". The end of the power supply on the functional component side may be directly electrically connected to the functional component, or may be electrically connected via a transparent conductive film or a foil conductor called a bus bar. The connection method may be any known means.

[0046] The first power supply 16 and the second power supply 17 are flexible belt-shaped connecting members each formed by covering an insulating material with at least two foil-shaped conductors having different potentials when the functional member is in operation. Specifically, the first power supply 16 has foil-shaped conductors 36 and 36' inside the insulating material, and the second power supply 17 has foil-shaped conductors 37 and 37' inside the insulating material. The foil-shaped conductors 36 and 36' of the first power supply 16 are separately arranged in the insulating material, and they are arranged in a manner that does not cause an electrical short circuit. The foil-shaped conductors 37 and 37' of the second power supply 17 are also separately arranged in the insulating material, and they are also arranged in a manner that does not cause an electrical short circuit.

[0047] The foil conductor 36' is arranged on the second power supply 17 side, and the foil conductor 37' is arranged on the first power supply 16 side. Therefore, the foil conductor 36' and the foil conductor 37' are the conductors closest to the first power supply 16 and the second power supply 17. In addition, the foil conductors 36, 36', 37, and 37' are all covered with insulating materials except for the ends (the contact points with the functional components). Regarding the foil conductors, Figure 1 The portion indicated by the dashed line shows the approximate shape of the portion covered by the insulating material, and the portion indicated by the dotted line shows the approximate shape of the portion not covered by the insulating material.

[0048] In addition, according to the laminated glass 100 for vehicles of the present embodiment, the first glass plate 10 and the second glass plate 18 may be configured without a notch. In the case where the first glass plate 10 and the second glass plate 18 are configured without a notch, at least the process of cutting the glass plates and the process of sealing the notch are not required. However, the laminated glass 100 for vehicles of the present embodiment may also be provided with a notch. In addition, the "notch" refers to a recessed portion provided at a portion of the periphery of the first glass plate 10 or the second glass plate 18 when the laminated glass 100 for vehicles is viewed from above. The notch is also referred to as an area where the first glass plate 10 and the second glass plate 18 do not overlap when the first glass plate 10 is viewed from above and is adjacent to a portion of the periphery of the first glass plate 10.

[0049] The first power supply 16 and the second power supply 17 are usually made of flexible materials. When these power supplies overlap each other when looking down at the first glass plate 10, after the laminated glass 100 for a vehicle is assembled on a vehicle, if the covering portion is damaged, etc., the conductor portion of one power supply may contact the conductor portion of another power supply and cause a short circuit. Therefore, when looking down at the first glass plate 10, the first power supply 16 and the second power supply 17 do not overlap within the plane of the first glass plate 10, thereby preventing a short circuit. In addition, when looking down at the first glass plate 10, it is preferred that the first power supply 16 and the second power supply 17 do not overlap outside the plane of the first glass plate 10.

[0050] In addition, when the first glass plate 10 is viewed from above, the first power supply body 16 and the second power supply body 17 intersect only one side (hereinafter also referred to as the power supply side) of the first glass plate 10. As a result, the wiring in the vehicle body frame extending outside the laminated glass 100 for vehicles can be simplified, and the operation becomes easy. The position of the power supply side is not particularly limited, and for example, it can be the upper side or the lower side of the first glass plate 10, and preferably the lower side (power supply side 10s) close to the power source mounted on the vehicle.

[0051] Figure 1 In the laminated glass 100 for a vehicle shown in the figure, the first power supply 16 and the second power supply 17 are arranged in a substantially parallel manner from the power supply side 10s as the lower side to the first functional component 14 and the second functional component 15. However, from the power supply side 10s to each functional component, a portion of the first power supply 16 and the second power supply 17 may not be substantially parallel. For example, in Figure 1 In the embodiment, the first power supply 16 can be electrically connected to the first functional component 14 via the side and / or top of the laminated glass 100 for vehicles. The second power supply 17 can be electrically connected to the second functional component 15 via the side and / or top of the laminated glass 100 for vehicles.

[0052] In addition, "substantially parallel" means that a distance variation of ±20% is allowed for the interval d1 between the first power feeder 16 and the second power feeder 17 on the power feeder side 10s (hereinafter also simply referred to as "inter-power feeder distance") d1. The inter-power feeder distance d1 is the distance from the second power feeder 17 side end of the foil-shaped conductor 36' to the first power feeder 16 side end of the foil-shaped conductor 37', which is measured along the power feeder side 10s.

[0053] The distance d1 between the power supply bodies is preferably less than 100 mm. If the distance d1 between the power supply bodies is less than 100 mm, it is easy to bundle the cables connecting the power supply bodies to the power source mounted on the vehicle, and the distance from the branch point of the bundled multiple cables to each power supply body becomes shorter, and the cables are not easy to shake even if they are not fixed to the vehicle body frame. The distance d1 between the power supply bodies is more preferably less than 50 mm, and further preferably less than 35 mm. In this way, in the case where these power supply bodies are exposed to the outside of the vehicle laminated glass 100 from a single power supply side 10s, when looking down at the first glass plate 10, the ease of bundling the above-mentioned cables and the effect of suppressing the shaking of the cables become significant compared with the configuration in which the first power supply body 16 and the second power supply body 17 are exposed to the outside of the vehicle laminated glass 100 from different sides.

[0054] In addition, for the power supply edge 10s, in order to protect the first functional component 14 (the second functional component 15) from physical impact or moisture, the distance d2 in the plane direction (Y-axis direction) from the power supply edge 10s to the periphery of the first functional component 14 (the second functional component 15) is greater than 0 mm, preferably 5 mm or more, and more preferably 10 mm or more. Thus, the periphery of the first functional component 14 and the second functional component 15 is preferably 5 mm or more away from the periphery of the first glass plate, and more preferably 20 mm or more away.

[0055] In addition, if Figure 1 As shown, the laminated glass 100 for a vehicle may include a band-shaped shading portion 50 at the periphery. The shading portion 50 can conceal all or part of the periphery of the functional members 14 and 15, the power supply bodies 16 and 17, the portion attached to the vehicle frame, and the residual bubbles described later.

[0056] Figure 2 The laminated glass 100 for a vehicle is shown in FIG. Figure 1 A sectional view observed from the negative direction of the Y axis when the XZ plane is cut at the position X1-X2 (hereinafter also referred to as the "X1-X2 sectional view"). Figure 2 In the laminated glass 100 for vehicles, a first glass plate 10, an intermediate film 20, and a second glass plate 18 are laminated in this order. The intermediate film 20 is laminated in the order of a first intermediate film 11, a first adjustment intermediate film 21, and a second intermediate film 12 from the first glass plate 10 side. In addition, the first functional component 14 and the second functional component 15 are both sandwiched between the first intermediate film 11 and the second intermediate film 12 and exist on substantially the same plane. In addition, Figure 2 In the embodiment, the first glass plate 10 has a first main surface 10a located on the side opposite to the first intermediate film 11, and a second main surface 10b located on the side opposite to the first intermediate film 11. The second glass plate 18 has a third main surface 18c located on the side opposite to the second intermediate film 12, and a fourth main surface 18d located on the side opposite to the second intermediate film 12.

[0057] However, in the laminated glass 100 for vehicles, for example, when the components are stacked in the manufacturing process, unnecessary bubbles (hereinafter also referred to as "residual bubbles") may be generated in the laminated glass for vehicles due to the height difference generated at the periphery of the functional component or the power supply body. In addition, since the intermediate film 20 is deformed in the manufacturing process, residual bubbles may also be generated outside the vicinity of the height difference.

[0058] The residual bubbles in the laminated glass 100 for vehicles will reduce the adhesion between the first glass plate 10 and the second glass plate 18 through the intermediate film 20, and may be more easily damaged by external impact. Therefore, in the laminated glass 100 for vehicles, when looking down at the first glass plate 10, it is better to have a small area of ​​the residual bubble portion. In addition, when the laminated glass 100 is installed on a vehicle as a windshield, if the driver sees the residual bubbles, it may hinder driving. Therefore, at least in the laminated glass 100 for vehicles, it is better that the residual bubbles in the opening described later are not conspicuous. Therefore, in order to eliminate the height difference (gap) around the periphery of the functional component and reduce the residual bubbles, the laminated glass 100 of this embodiment has a first adjustment intermediate film 21 between the first intermediate film 11 and the second intermediate film 12.

[0059] That is, when the laminated glass 100 is viewed from above, the inner edge shape of the first adjustment intermediate film 21 is substantially the same as the peripheral edge shape of the first functional member 14 and the second functional member 15. Furthermore, the first functional member 14 and the second functional member 15 are located in the hollowed-out portion further inside the outer edge of the first adjustment intermediate film 21.

[0060] But, the first functional component 14 and the second functional component 15 do not necessarily need to be located in 2 hollowed-out parts of the first adjustment intermediate film 21 that exists independently respectively, and can also be that a plurality of functional components are located in 1 (large) hollowed-out part that exists independently. In addition, at least a part of the periphery of the first functional component 14 and the second functional component 15 can be connected with the inner edge of the first adjustment intermediate film 21.

[0061] In this way, at least a portion of the periphery of the first functional member 14 and the second functional member 15 is in contact with the inner edge of the first adjusting intermediate film 21, so that the periphery of each functional member at the contact portion is not likely to have a gap when stacked, and the first glass plate 10 and the second glass plate 18 are more likely to be closely attached via the intermediate film 20. From the viewpoint of reducing residual bubbles, the ratio of the length of the periphery of the first functional member 14 and the second functional member 15 in contact with the inner edge of the first adjusting intermediate film 21 is preferably 50% or more, more preferably 70% or more, further preferably 90% or more, and particularly preferably 100%.

[0062] In order to reduce the residual bubbles, the distance d1 between the power supply bodies is preferably less than 50 mm, more preferably less than 45 mm, further preferably less than 35 mm, particularly preferably less than 25 mm, and most preferably less than 15 mm. In addition, the distance d1 between the power supply bodies is preferably, for example, more than 2 mm. If the distance d1 between the power supply bodies is more than 2 mm, even if the positional offset of the first functional component 14 and the second functional component 15 during lamination and the installation accuracy of the power supply bodies are taken into account, it is not easy for the power supply bodies to overlap with each other. Therefore, it is easy to reduce the residual bubbles and the breakage of the laminated glass 100 for vehicles during crimping and on the market (after circulation). The distance d1 between the power supply bodies can be more than 3 mm, more than 4 mm, or more than 5 mm. On the other hand, the distance d2 from the power supply edge 10s to the periphery of the first functional component (the second functional component) is preferably less than 65 mm, more preferably less than 60 mm, further preferably less than 40 mm, particularly preferably less than 30 mm, and most preferably less than 20 mm.

[0063] The laminated interlayer 20 flows under high temperature and high pressure during the manufacturing process of the laminated glass 100. The smaller the distance d2, the higher the probability that bubbles generated in the laminated glass 100 reach the power supply side 10s and disappear, and the less bubbles remain.

[0064] Figure 3 The figure shows a side view including a power supply side 10s of a laminated glass for a vehicle 100. In the side view of the laminated glass 100 of the present embodiment, the first power supply body 16 is sandwiched between the first interlayer film 11 and the first adjustment interlayer film 21, and the second power supply body 17 is sandwiched between the second interlayer film 12 and the first adjustment interlayer film 21. In this way, the power supply bodies are sandwiched by the interlayer film 20, whereby the laminated glass for a vehicle 100 can firmly hold these power supply bodies.

[0065] Figure 3 In the laminated glass 100 for vehicles of the present embodiment shown, the first power supply 16 is arranged on one principal surface side of the first adjustment interlayer 21, and the second power supply 17 is arranged on the other principal surface (the principal surface opposite to the above-mentioned one surface) side of the first adjustment interlayer 21. Thus, in the laminated glass 100 for vehicles of the present embodiment, the first power supply 16 and the second power supply 17 are arranged on different principal surfaces.

[0066] That is, the first functional component 14 and the second functional component 15 exist on approximately the same plane, but the distance from the main surface of a glass plate (for example, the second main surface 10b of the first glass plate 10) to the first power supply 16 is different from the distance from the main surface (10b) of the glass plate to the second power supply 17. In the high temperature and high pressure environment in the manufacturing process of the laminated glass 100 for vehicles, the laminated intermediate film 20 will flow. As a result, the intermediate films constituting the intermediate film 20 adhere to each other so that the interface area is reduced and the effect of achieving uniform thickness is produced. Therefore, making a difference between the distance from the main surface of a glass plate to the first power supply 16 and the distance from the main surface of the glass plate to the second power supply 17 will cause the intermediate film 20 to flow actively, making it easier to fill each corner between the glass plates. As a result, it is not easy to produce residual bubbles, and the adhesion between the glass plate and the intermediate film 20 is also improved.

[0067] (Second embodiment)

[0068] Figure 4 1 is a side view including a power supply side 10s of a laminated glass 200 for a vehicle according to a second embodiment of the present invention. In this embodiment, differences from the laminated glass 100 for a vehicle according to the first embodiment will be described, and the description of the first embodiment will be cited for other points.

[0069] In this embodiment, if Figure 4 As shown, the first power supply body 16 and the second power supply body 17 are arranged on the same side of the first adjustment intermediate film 21. That is, in the laminated glass 100 for vehicles, the distance from one main surface of the glass plate (for example, the second main surface 10b of the first glass plate 10) to the first power supply body 16 is substantially the same as the distance from the main surface (10b) of the glass plate to the second power supply body 17. In this case, the intermediate film 20 has an auxiliary intermediate film 25 at least in a portion (in the X-axis direction) between the first power supply body 16 and the second power supply body 17, thereby reducing the residual bubbles. Moreover, the auxiliary intermediate film 25 can also reduce the stress applied to the glass during crimping. Thereby, the cracking caused by the primary stress during crimping or the cracking caused by the residual stress in the market can be reduced.

[0070] The auxiliary intermediate film 25 may be made of the same material as at least one of the first intermediate film 11, the second intermediate film 12, and the first adjustment intermediate film 21. In addition, the auxiliary intermediate film 25 may extend in the Y-axis direction from between the first power supply body 16 and the second power supply body 17 to, for example, between the first functional member 14 and the second functional member 15. In this case, if the auxiliary intermediate film 25 is arranged at least a portion between the first functional member 14 and the second functional member 15 (in the X-axis direction), it is preferred from the viewpoint of the effect of reducing the residual bubbles, and it is more preferred to be arranged in the entirety. In addition, the auxiliary intermediate film 25, the first intermediate film 11, the second intermediate film, and the first adjustment intermediate film 21 are more preferably all made of the same material.

[0071] (Third embodiment)

[0072] Figure 5 1 is a side view including a power supply edge 10s of a laminated glass 300 for a vehicle according to a third embodiment of the present invention. Figure 5 In FIG. 1 , the dotted lines show the approximate shapes of the first functional member 14 and the second functional member 15 so as to clarify the arrangement of the intermediate film 20 , the functional members 14 , 15 , and the power supply bodies 16 , 17 .

[0073] In this embodiment, the laminated glass 300 for a vehicle has an intermediate film 20, and the intermediate film 20 is stacked in the order of the first intermediate film 11, the third intermediate film 13, and the second intermediate film 12. In addition, the third intermediate film 13 is arranged between the first functional member 14 and the second functional member 15 (in the Z direction). Moreover, the first functional member 14 and the first power supply 16 are sandwiched between the first intermediate film 11 and the third intermediate film 13, and the second functional member 14 and the second power supply 17 are sandwiched between the second intermediate film 12 and the third intermediate film 13.

[0074] Thus, in this embodiment, the first functional member 14 and the first power supply 16 and the second functional member 15 and the second power supply 17 are separated by the third intermediate film 13. Thus, the first functional member 14 and the second functional member 15 do not exist on the same plane. Similarly, the first power supply 16 and the second power supply 17 do not exist on the same plane.

[0075] Therefore, the distance from the second main surface 10b of the first glass plate 10 to the first power supply 16 is different from the distance from the second main surface 10b of the first glass plate 10 to the second power supply 17. Therefore, in the high temperature and high pressure environment in the manufacturing process of the laminated glass 300 for vehicles, the intermediate film 20 will actively flow and easily fill every corner between the glass plates. As a result, bubbles are not easily generated, and the adhesion between the glass plates and the intermediate film is also improved.

[0076] In addition, the vehicle laminated glass 300 of the present embodiment may also have a first adjustment interlayer film (not shown) between the first interlayer film 11 and the third interlayer film 13. In this case, the first adjustment interlayer film has a hollow portion having a shape substantially the same as the outer edge shape of the first functional member 14 when the laminated glass 100 is viewed from above, but does not have a hollow portion having a shape substantially the same as the outer edge shape of the second functional member 15, which is different from the first embodiment.

[0077] In addition, a second adjusting intermediate film (not shown) may be provided between the second intermediate film 11 and the third intermediate film 13. In this case, the outer edge shape of the second adjusting intermediate film (not shown) is substantially the same as that of the first glass plate 10, and has a hollow portion substantially the same as that of the outer edge shape of the second functional component 15. Thus, the second functional component 15 is located in the hollow portion that is further inside than the outer edge of the second adjusting intermediate film. These adjusting intermediate films are effective in improving the closeness of the first glass plate 10 and the second glass plate 18 at the peripheral edge of each functional component and reducing residual bubbles. Moreover, having these auxiliary intermediate films can also reduce the stress applied to the glass during crimping. Thereby, cracks caused by primary stress during crimping or cracks caused by residual stress in the market can be reduced.

[0078] (Fourth embodiment)

[0079] Below, using Figures 4 to 8 A sixth embodiment of the present invention will be described. Figure 6 The fourth embodiment is a top view of a laminated glass for a vehicle, which is also a top view of a laminated glass for a vehicle of a fifth embodiment described later. In this embodiment, the differences from the laminated glass for a vehicle 100 of the first embodiment are also described, and the description of the first embodiment is cited for other points.

[0080] Figure 6 In the laminated glass 400 for a vehicle shown, the first functional component 14 and the second functional component 15 overlap in their entirety when the first glass plate 10 is viewed from above. Furthermore, both functional components are present on the inner side of the periphery of the first glass plate 10. In addition, when the first glass plate 10 is viewed from above, the first functional component 14 and the second functional component 15 may have at least a portion overlapping and a portion not overlapping each other.

[0081] In the laminated glass 400 for a vehicle of the present embodiment, the peripheries of the two functional members overlap when the first glass plate 10 is viewed in plan. In order to prevent gaps from being formed between the peripheries of the functional members and reduce residual bubbles, the laminated glass 400 for a vehicle has the following configuration.

[0082] Figure 71 is a cross-sectional view of a laminated glass 400 for a vehicle according to a fourth embodiment, taken along the line X1 - X2 . Figure 7 In the embodiment, the intermediate film 20 is stacked in the order of the first intermediate film 11, the first adjustment intermediate film 21, the second adjustment intermediate film 22, and the intermediate film 12 from the first glass plate 10 side. In addition, the first functional component 14 and the second functional component 15 are both sandwiched between the first intermediate film 11 and the second intermediate film 12 and do not exist on the same plane.

[0083] So, if Figure 7 As shown, the laminated glass 400 for a vehicle has a first adjusting interlayer film 21 on the outer side of the periphery of the first functional component 14, and has a second adjusting interlayer film 22 on the outer side of the periphery of the second functional component 15. When the first glass plate 10 is viewed from above, the second adjusting interlayer film 22 has an outer edge shape that is substantially the same as the outer edge shape of the first glass plate 10 and an inner edge shape (hollow portion) that is substantially the same as the outer edge shape of the second functional component 15.

[0084] In addition, when the outer edge shapes of the first functional member 14 and the second functional member 15 are substantially the same when the first glass plate 10 is viewed from above, the first adjustment intermediate film 21 may be arranged outside the periphery of both the first functional member 14 and the second functional member 15. In this case, the second adjustment intermediate film 22 may not be arranged, and only the first adjustment intermediate film 21 may be arranged. In addition, the laminated glass 400 for a vehicle may have an adhesive (not shown) between the first functional member 14 and the second functional member 15 to reduce the residual bubbles between the functional members.

[0085] Thus, in the laminated glass 400 for vehicles, the intermediate film 20 has the first adjustment intermediate film 21, or has the first adjustment intermediate film 21 and the second adjustment intermediate film 22. Therefore, in the laminated glass 400 for vehicles, the intermediate film 20 and the first glass plate 10 and the second glass plate 18 are easily in close contact at the peripheral portion of each functional component, and the residual bubbles can be reduced. Having these adjustment intermediate films can reduce the stress applied to the glass during crimping. Thereby, the cracks caused by the primary stress during crimping or the cracks caused by the residual stress in the market can be reduced. In addition, the effect of the first adjustment intermediate film 21 and the second adjustment intermediate film 22 becomes significant when the thickness of the first adjustment intermediate film 21, or the first functional component 14 and the second functional component 15 is 0.15 mm or more, and is particularly significant when it is 0.18 mm or more.

[0086] Figure 8 FIG. 4 is a side view of a laminated glass 400 for a vehicle including a power supply edge 10s according to a fourth embodiment. Figure 8As shown, the laminated glass 400 for a vehicle firmly holds the first power supply body 16 and the second power supply body 17 by the interlayer 20. In this embodiment, the first power supply body 16 is sandwiched by the first adjustment interlayer 21 and the second adjustment interlayer 22, but it can also be sandwiched by the first interlayer 11 and the first adjustment interlayer 21. In this case, the second power supply body 17 can be sandwiched by the first adjustment interlayer 21 and the second adjustment interlayer 22.

[0087] In this embodiment, the distance from a glass plate (e.g., the second main surface 10b of the first glass plate 10) to the first power supply 16 is different from the distance from the main surface (10b) of the glass plate to the second power supply 17. Therefore, under the high temperature and high pressure environment in the manufacturing process, the intermediate film 20 will flow actively and easily fill every corner between the glass plates. As a result, in the laminated glass 400 for vehicles, bubbles are not easily generated, and the adhesion between the glass plate and the intermediate film 20 is also improved.

[0088] (Fifth embodiment)

[0089] Fig. 9 and Fig.10 The following are shown: Figure 6 The X1-X2 cross-sectional view of the laminated glass 500 for a vehicle according to the fifth embodiment of the present invention and the side view including the power supply side 10s are shown. Fig. 9 As shown, the interlayer film 20 of the laminated glass for vehicle 500 is different from the fourth embodiment in that the interlayer film 20 has the third interlayer film 13 between the first functional component 14 and the second functional component 15 in the thickness direction (Z-axis direction). In addition, the first functional component 14 is sandwiched by the first interlayer film 11 and the third interlayer film 13, and the second functional component 15 is sandwiched between the second interlayer film 12 and the third interlayer film 13.

[0090] In addition, if Fig.10 As shown, the first power supply 16 is sandwiched between the first adjustment intermediate film 21 and the third intermediate film 13, and the second power supply 17 is sandwiched between the second adjustment intermediate film 22 and the second intermediate film 12. However, the first power supply 16 may be sandwiched between the first adjustment intermediate film 21 and the second adjustment intermediate film 22, or may be sandwiched between the first intermediate film 11 and the first adjustment intermediate film 21. The second power supply 17 may be sandwiched between the third intermediate film 13 and the second adjustment intermediate film 22.

[0091] Thus, in the laminated glass 500 for a vehicle of the present embodiment, the first functional member 14 and the first power supply 16, and the second functional member 15 and the second power supply 17 are separated in the thickness direction by the third intermediate film 13. Therefore, the first functional member 14 and the second functional member 15 do not exist on the same plane. Furthermore, the first power supply 16 and the second power supply 17 do not exist on the same plane either.

[0092] Therefore, the distance from the second main surface 10b of the first glass plate 10 to the first power supply 16 is different from the distance from the second main surface 10b of the first glass plate 10 to the second power supply 17. Therefore, in the high temperature and high pressure environment in the manufacturing process of the vehicle laminated glass 500, the intermediate film 20 will actively flow and easily fill every corner between the glass plates. As a result, in the vehicle laminated glass 500, bubbles are not easily generated, and the adhesion between the glass plates and the intermediate film 20 is also improved.

[0093] Next, each component included in the laminated glass for a vehicle 100 to 500 according to each embodiment of the present invention will be described in more detail. Figures 1 to 10 The reference numerals used are the same as those of the laminated glass for vehicles, while the reference numerals of the laminated glass for vehicles are omitted.

[0094] <Glass plate>

[0095] The first glass plate 10 and the second glass plate 18 may be flat plates, at least one of which may be curved, or both of which may be curved. The first glass plate 10 and the second glass plate 18 may be single curved shapes (cylindrical shapes) with a single curved direction, or may be multi-curved shapes curved in two orthogonal directions.

[0096] The radius of curvature of the first glass plate 10 is preferably substantially the same as the radius of curvature of the second glass plate 18 (especially including the case of a flat plate) or larger than the radius of curvature of the second glass plate 18. That is, the ratio of the minimum radius of curvature (r2) of the second glass plate 18 to the minimum radius of curvature (r1) of the first glass plate 10 is preferably 1≤r1 / r2.

[0097] In order to reduce the generation of wrinkles or perspective distortion of the intermediate film 20, r1 and r2 are preferably 500 mm or more, and more preferably 700 mm or more. In addition, when the laminated glass for a vehicle has a curved shape, the maximum radius of curvature (R1) of the first glass sheet 10 and the maximum radius of curvature (R2) of the second glass sheet 18 are preferably 100,000 mm or less, more preferably 50,000 mm or less, further preferably 30,000 mm or less, and particularly preferably 20,000 mm or less.

[0098] When the laminated glass for a vehicle with substantially the same r1 and r2 is installed on a vehicle, either the first glass plate 10 or the second glass plate 18 can be arranged on the vehicle interior side. When the laminated glass for a vehicle with different r1 and r2 is installed on a vehicle, in order to ensure the strength of the laminated glass, it is preferred that the glass plate corresponding to the larger value of r1 and r2 is arranged on the vehicle exterior side. For example, when r1>r2, the first glass plate 10 can be arranged on the vehicle exterior side, and the second glass plate 18 can be arranged on the vehicle interior side.

[0099] The first glass plate 10 and the second glass plate 18 may be conventionally known inorganic glass or organic glass used for vehicle window glass. The composition of the first glass plate 10 may be the same as or different from that of the second glass plate 18. Examples of the inorganic glass include common soda-lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, and quartz glass.

[0100] These glass sheets can be manufactured by any known method such as float process, fusion process, roller pressing process, down-draw process, etc. The inorganic glass is bent by gravity forming or pressure forming, and the glass sheet is bent at high temperature. In addition, the inorganic glass can be unstrengthened glass formed by forming molten glass into a plate shape and slowly cooling it, and can also be subjected to strengthening treatment such as physical strengthening (such as air cooling strengthening) and chemical strengthening as needed.

[0101] As organic glass, polycarbonate resin, acrylic resin, polystyrene resin, aromatic polyester resin, polyester resin, polyarylate resin, condensation product of halogenated bisphenol A and ethylene glycol, acrylic urethane resin, acrylic resin containing halogenated aryl, etc. can be listed. From the perspective of obtaining a lightweight and flexible sheet, organic glass is preferably polycarbonate resin. In addition, the above resins can be used in combination of two or more.

[0102] Among the materials exemplified above, soda-lime glass or alkali-free glass is preferred for the first glass plate 10 and the second glass plate 18. Furthermore, float glass is preferred for the first glass plate 10 and the second glass plate 18.

[0103] Inorganic glass and organic glass are usually colorless, but can be colored as long as they are transparent. In the case of color, it can be so-called privacy glass with a dark color such as gray. Privacy glass has the effect of making it difficult to see into the car from outside the car, reducing the transmission of sunlight from outside the car to the inside of the car, and improving the aesthetic effect when observing from inside and outside the car. Privacy glass is suitable for parts other than windshields, especially sunroofs, side windows at the rear of the vehicle, rear windows, triangular windows, etc. In addition, inorganic glass and organic glass can contain infrared shielding materials, ultraviolet shielding materials, etc.

[0104] The thickness of the first glass plate 10 and the second glass plate 18 can be appropriately selected according to the type or part of the vehicle on which the laminated glass for a vehicle is mounted, but generally can be 0.1 mm to 10 mm respectively. In addition, in order to make the unit area density (surface density) obtained from the mass and surface area of ​​the laminated glass for a vehicle 100 fall within a preferred range, the thickness of the first glass plate 10 and the second glass plate 18 is preferably 0.3 mm to 2.6 mm. The thicknesses of the two glass plates 10 and 18 can be the same or different from each other.

[0105] When the thickness of the two glass sheets 10 and 18 is different, when the laminated glass for a vehicle is installed in a vehicle, it is preferable to arrange the glass sheet located on the vehicle outer side to be thicker than the glass sheet located on the vehicle inner side, from the viewpoint of the impact resistance against flying stones from the outside. In this case, in the laminated glass for a vehicle, from the viewpoint of the impact resistance against flying stones, the difference between the thickness of the first glass sheet 10 and the thickness of the second glass sheet 18 is preferably 0.3 mm to 1.5 mm, and more preferably 0.3 mm to 1.3 mm.

[0106] When the laminated glass for vehicle is installed on a vehicle, the thickness of the glass plate located outside the vehicle is preferably 1.1 mm or more, more preferably 1.3 mm or more, further preferably 1.6 mm or more, and particularly preferably 1.8 mm or more. In addition, the thickness of the glass plate located outside the vehicle is preferably 2.6 mm or less, more preferably 2.1 mm or less.

[0107] On the other hand, when the laminated glass for a vehicle is installed in a vehicle, the thickness of the glass plate located on the inner side of the vehicle is preferably 0.3 mm or more, more preferably 0.5 mm or more, further preferably 0.7 mm or more, particularly preferably 1.1 mm or more, and most preferably 1.6 mm or more. In addition, the thickness of the glass plate located on the inner side of the vehicle is preferably 2.6 mm or less, more preferably 2.1 mm or less.

[0108] At least one of the surfaces (the first main surface 10a and the fourth main surface 18d) of the two glass plates 10 and 18 exposed to the atmosphere may be laminated with a coating film that imparts a water-repellent function, a hydrophilic function, an anti-fogging function, etc. In addition, the surfaces (the second main surface 10b and the third main surface 18c) of the two glass plates 10 and 18 facing each other may be laminated with a coating film that generally includes a metal layer, such as a low-radioactive coating, an infrared shading coating, or a conductive coating.

[0109] <Interlayer>

[0110] The intermediate film 20 may be made of materials commonly used in laminated glass, such as thermoplastic resins, thermosetting resins, or photocurable compositions, and may be formed by curing these resins. The term "curing" as used herein includes hardening.

[0111] The intermediate film 20 has various functions such as facilitating mutual bonding of components, shock buffering, and sound insulation described later. From the viewpoint of adhesion, it is preferred that at least two of the first intermediate film 11, the second intermediate film 12, the third intermediate film 13, the first adjustment intermediate film 21, the second adjustment intermediate film 22, and the auxiliary intermediate film 25 are made of the same material, and it is more preferred that all of the intermediate films 20 are made of the same material.

[0112] In addition, the intermediate film 20 has sound insulation properties by being stacked with layers having different glass transition temperatures. As a three-layer laminated structure having sound insulation properties, for example, the intermediate film 20 may be a structure in which the layer located in the middle position in the thickness direction is a core layer having a glass transition temperature of less than 15°C, and the two layers sandwiching the core layer (middle layer) are surface layers having a glass transition temperature of more than 15°C. As a five-layer laminated structure having sound insulation properties, for example, the intermediate film 20 may be a structure in which surface layer, core layer, surface layer, core layer, and surface layer are stacked in this order. In this case, the laminated glass for vehicles of each embodiment has a sound insulation effect in addition to the effect of reducing residual bubbles.

[0113] Examples of thermoplastic resins include polyvinyl acetal resins such as polyvinyl butyral resin (PVB), polyvinyl chloride resin (PVC), saturated polyester resin, polyurethane resin, ethylene-vinyl acetate copolymer resin (EVA), ethylene-ethyl acrylate copolymer resin, cycloolefin polymer (COP), etc. The thermoplastic resin used for the intermediate film 20 is preferably PVB, EVA, polyurethane resin, etc. These thermoplastic resins can be used alone or in combination of two or more. Typical thermosetting resins are silicone resins and acrylic resins.

[0114] A typical photocurable composition comprises a curable compound (A) having a curable group and a photopolymerization initiator (B). The photocurable composition may further comprise other non-curable components other than the photopolymerization initiator (B) as required. Examples of the non-curable components include non-curable polymers (C), chain transfer agents (D), and other additives.

[0115] Examples of the curable compound (A) include acrylic, silicone, acrylic urethane, and epoxy compounds. Among them, it is easy to adjust the storage elastic modulus G' to 5×10 2 Pa~1×10 7 From the perspective of Pa, the curable compound (A) is preferably a silicone or acrylic polyurethane. Furthermore, from the perspective of easily adjusting the gel fraction to 1% to 50%, the curable compound (A) is more preferably an acrylic polyurethane. If a photocurable resin is used for the intermediate film 20, since heating is not required in the pressing process, the laminated glass will not crack or warp due to heating.

[0116] The intermediate film 20 may use one of these resins alone or in combination. For example, in order to ensure the rigidity or sound insulation of the laminated glass for vehicles, different materials of different properties may be used in the central portion and the peripheral portion of the laminated glass for vehicles. For example, the peripheral portion of the laminated glass for vehicles may be the region where the first adjustment intermediate film 21 or the second adjustment intermediate film 22 is disposed when the first glass plate 10 is viewed from above, and the central portion may be the region further inside than the peripheral portion.

[0117] The intermediate film 20 contains any one of a thermoplastic resin, a thermosetting resin, and a photocurable composition as a main component. The intermediate film 20 may also contain one or more of various additives such as an infrared absorber, an ultraviolet absorber, a colorant, a fluorescent agent, an adhesion modifier, a coupling agent, a surfactant, an antioxidant, a heat stabilizer, a light stabilizer, a dehydrating agent, a defoaming agent, an antistatic agent, and a flame retardant. The coloring layer formed by the colorant can be used as a so-called shading tape layer to reduce the glare of vehicle passengers caused by sunlight. For example, when the laminated glass for a vehicle is installed on a vehicle, the shading tape layer can be set in a strip shape along its upper edge.

[0118] From the perspective of ensuring operability, the total thickness of the interlayer film may be 0.1 mm to 3.1 mm. From the perspective of ensuring penetration resistance, the thickness of each interlayer film is preferably 0.3 mm to 3.0 mm, and from the perspective of the weight limit of the laminated glass, it is more preferably 0.3 mm to 1.2 mm, and particularly preferably 0.3 mm to 0.8 mm. The thickness of each interlayer film may be the same or different.

[0119] <Functional components>

[0120] Hereinafter, the first functional component 14 and the second functional component 15 are also simply collectively referred to as "functional components". The functional component is a layer that is electrically driven by a power supply body supplied with electricity from a power source. The functional component that is electrically driven may be a dimming layer, a light-emitting layer, an electric heating layer, etc. It is sufficient for the functional component to be electrically driven as long as the entire part constitutes a plane. On the other hand, for example, an infrared light-shielding coating film disposed between the first glass plate 10 and the second glass plate 18 or a resin film that emits light by ultraviolet rays, although the entire part constitutes a plane, is not electrically driven and is therefore not included in the functional component.

[0121] The first functional member 14 and the second functional member 15 may be layers having the same function or layers having different functions. For example, the first functional member 14 may be a dimming layer and the second functional member 15 may be a light-emitting layer, the first functional member 14 may be a light-emitting layer and the second functional member 15 may be an electric heating layer, or both the first functional member 14 and the second functional member 15 may be a dimming layer. These combinations are merely illustrative, and the combination of functional members may be arbitrarily selected.

[0122] The dimming layer can be any layer that changes the color as long as it has the function of changing the visible light transmittance by electric drive. Examples of the dimming layer include electrochromic (EC) films, liquid crystal (LC) films, suspended particle devices (SPD) films, and electrokinetic (EK) films. The dimming layer can also be used as a light shielding tape.

[0123] The light-emitting layer can contain materials that emit light by being driven by electricity, such as cold cathode fluorescent lamps (CCFL), light-emitting diodes (LED), organic light-emitting diodes (OLED), lasers, or displays using these materials. In addition, the light-emitting layer can also be used as a display for indicating direction or reminding attention.

[0124] The electric heating layer may contain any material that generates heat by being driven by electricity, and may contain at least one of metal, metal oxide, and conductive polymer. The electric heating layer may be in any shape, and its shape may be, for example, a film or a thin wire. In addition, the electric heating layer may specifically be an electric heating film for anti-fogging or an electric heating wire for melting ice.

[0125] <Electrical source and foil conductor>

[0126] The direction in which the foil conductors 36 and 36' of the first power supply body 16 are separated from each other may be the thickness direction of the laminated glass for vehicles. However, in this case, the thickness of the first power supply body 16 increases, and bubbles may be more likely to remain after the intermediate film 20 is sealed, so the direction in which they are separated from each other is preferably the planar direction. The same is true for the foil conductors 37 and 37' of the second power supply body 17.

[0127] Furthermore, the foil conductor 36' and the foil conductor 37' may be conductors driven at the same potential. Specifically, if the foil conductor 36' and the foil conductor 37' are ground wires, they will not be short-circuited even if they come into contact, and damage to the functional component can be prevented.

[0128] The insulating material may be a thermosetting resin or a thermoplastic resin. The insulating material may be, for example, polyester resins such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polyamide resins such as nylon 6, nylon 66, nylon 610, polyimide resins such as polyimide, polyamide-imide, polyetherimide, fluorine resin, polyether sulfone, polyether ketone, polyether sulfide, polyarylate, polyester ether, wholly aromatic polyamide, polyarylamide, polypropylene (PP), polycarbonate (PC), liquid crystal polymer, and other resins.

[0129] Among these resins, the insulating material is preferably a polyimide resin such as polyimide that can withstand the high temperature and high pressure conditions when manufacturing laminated glass for vehicles. However, the resin used as the insulating material is not particularly limited as long as it has insulation, flexibility and heat resistance. The material constituting the foil-shaped conductors 36, 36', 37, 37' is preferably a metal such as gold, silver, copper, and more preferably copper. In addition, the material can also be replaced by carbon instead of metal. The foil-shaped conductors can be the same material or different materials.

[0130] The thickness of the foil conductor also depends on the type of functional component, but in order to correspond to the functional component used in the laminated glass for vehicles, if the thickness of each layer is 0.01 mm or more, the width of the power supply body will not be too wide, so it is preferable in terms of operation, and it is more preferably 0.05 mm or more, and further preferably 0.07 mm or more. In addition, if the thickness of the foil conductor is 0.6 mm or less per layer, the power supply body will not become too thick, so it is preferable, and it is more preferably 0.4 mm or less, further preferably 0.2 mm or less, and particularly preferably 0.1 mm or less.

[0131] If the thickness of the power supply body is 0.1 mm or more in the portion including the foil conductor, it is not easy to break even when exposed to the vibration of the vehicle, so it is preferred, and it is more preferably 0.15 mm or more, and further preferably 0.2 mm or more. In addition, if the thickness of the power supply body is 0.8 mm or less in the portion including the foil conductor, it is possible to suppress the influence of the height difference caused by the auxiliary intermediate film, etc., so it is preferred, and it is more preferably 0.6 mm or less, further preferably 0.4 mm or less, and particularly preferably 0.3 mm or less.

[0132] If the thickness of the power supply body is 0.08 mm or more in the portion not including the foil conductor, it is not easy to break, so it is preferred, and it is more preferably 0.1 mm or more, and further preferably 0.12 mm or more. The upper limit of the thickness of the power supply body in the portion not including the foil conductor is roughly less than the thickness of the portion including the foil conductor.

[0133] <Light shielding part>

[0134] The laminated glass for vehicles may have, for example, a light shielding portion 50 having a width extending from the power supply side 10s toward the center and overlapping at least a portion of the periphery of the first functional member 14 and the second functional member 15. If the width of the light shielding portion 50 is 5 mm or more from the periphery of the first functional member 14 or the second functional member 15 inward, the periphery of the functional member can be effectively concealed, and therefore it is preferred.

[0135] When the laminated glass for a vehicle has the shading portion 50, the laminated glass for a vehicle has an opening portion that overlaps with the first glass plate 10 when looking down at the first glass plate 10 and is located at a portion where the shading portion 50 is not present, thereby ensuring the field of vision of the driver. In order to ensure the area of ​​the opening portion, the width of the shading portion 50 is preferably 50 mm or less, more preferably 30 mm or less, and particularly preferably 20 mm or less from the periphery of the first functional member 14 or the second functional member 15 in the inner direction.

[0136] Materials constituting the light shielding portion 50 include organic ink, inorganic ceramics, colored interlayers, and the like. The light shielding portion 50 can be formed, for example, by applying organic ink or inorganic ceramics on the glass surface by screen printing or the like and drying the resultant. The color of the light shielding portion 50 can be any color as long as it can block visible light to a degree that allows it to be concealed at least in the portion to be concealed, preferably a dark color such as black, brown, gray, navy blue, and more preferably black. As an example, the following shows an example in which the light shielding portion 50 is composed of a ceramic layer on the glass surface.

[0137] The ceramic layer constituting the light shielding portion 50 can be provided on at least one of the second main surface 10b and the fourth main surface 18d, for example. The light shielding portion 50 provided on the second main surface 10b is advantageous for concealment when observed from outside the vehicle, and the light shielding portion 50 provided on the fourth main surface 18d is advantageous for concealment when observed from inside the vehicle. The ceramic layer is preferably provided on the second main surface 10b and the fourth main surface 18d so as to provide excellent concealment when observed from inside and outside the vehicle.

[0138] Next, the method for manufacturing the laminated glass for a vehicle of the present invention will be described by taking the laminated glass 100 for a vehicle as an example.

[0139] <Method for producing laminated glass for vehicles>

[0140] The manufacturing method of the laminated glass 100 for a vehicle in which the first glass plate 10, the intermediate film 20 and the second glass plate 18 are sequentially laminated comprises (1) a lamination step and (2) a first pressing step, and the step (2) is entered after the step (1). In addition, the manufacturing method may further comprise (3) a second pressing step after the first pressing step (2).

[0141] (1) Lamination process

[0142] The lamination step is a step of preparing a laminated body including the first glass plate 10 , the intermediate film 20 , the first functional member 14 connected to the first power supply body 16 , the second functional member 15 connected to the second power supply body 17 , and the second glass plate 18 .

[0143] The intermediate film 20 includes a first intermediate film 11 and a second intermediate film 12. Therefore, the lamination step is specifically a step of arranging the first functional component 14 connected to the first power supply 16 and the second functional component 15 connected to the second power supply 17 to be located between the first intermediate film 11 and the second intermediate film 12. In the lamination step, it is preferred that the peripheries of the first functional component 14 and the second functional component 15 are arranged to be further inside than the periphery of the first glass plate 10.

[0144] The lamination step can also be said to be a step of preparing the laminate so that the laminate can be obtained after the first pressing step (2) or the second pressing step (3) described later. Figures 1 to 3In any case, when the first glass plate 10 is viewed from above, at least a portion of the first power supply body 16 and the second power supply body 17 intersects only with the power supply side 10s which is one side of the first glass plate 10, and the first power supply body 16 and the second power supply body 17 do not overlap in the plane of the first glass plate 10.

[0145] The inventors noticed that when looking down at the first glass plate 10, the thickness of the intermediate film 20 and the power supply body changes in the first pressing step (2) or the second pressing step (3) described later, etc., at the portion where the laminate overlaps with the power supply body and the portion where the laminate does not overlap with the power supply body. Therefore, after careful research, the inventors found the following formulas (1) and (2) using a value of 0.8 as a weight. (1) In the lamination process, when the first glass plate 10 is observed from the side view including the power supply side 10s, by satisfying formula (1), the bubble residue of the vehicle laminated glass 100 can be reduced. It is preferred that the bubble residue can be further reduced by satisfying formula (2) at the same time.

[0146] Formula (1): t i ≥0.8×(t F1 +t iF1 )

[0147] t i : The thickness of the intermediate film between the first power supply body and the second power supply body in the plane direction (X-axis direction)

[0148] t F1 : Thickness of the thickest part of the first power supply body

[0149] t iF1 : The thickness of the intermediate film at the portion overlapping with the first power supply body

[0150] Formula (2): t i ≥0.8×(t F2 +t iF2 )

[0151] t F2 : Thickness of the thickest part of the second power supply body

[0152] t iF2 : The thickness of the intermediate film overlapping with the second power supply body

[0153] Furthermore, in the lamination step of (1), when the first glass plate 10 is viewed from the side including the power supply edge 10s, by satisfying the formula (3), it is possible to manufacture a laminated glass 100 for a vehicle in which the first glass plate 10, the intermediate film 20, and the second glass plate 18 are sufficiently closely attached. Furthermore, by satisfying the formula (4) at the same time, it is possible to manufacture the laminated glass 100 for a vehicle more advantageously.

[0154] Formula (3): 1.2×(t F1 +t iF1 )≥t i

[0155] Formula (4): 1.2×(t F2 +t iF2 )≥t i

[0156] Fig.11 (a) to (c) are side views showing the first glass plate 10 of the laminate including the power feeding edge 10s. Fig.11 In (a), when looking down at the first glass plate 10, the overlapping portion of the laminate and the first power supply body 16, the overlapping portion of the laminate and the second power supply body 17, and the portion between the first power supply body 16 and the second power supply body 17 in the plane direction (X-axis direction) of the laminate are respectively indicated by dotted lines. Fig.11 (b) The extracted part shown. Fig.11 (b) shows Fig.11 The dotted line portion of (a) is an extracted portion. Fig.11 (c) shows Fig.11 (a) and Fig.11 (b) is an enlarged view of the vicinity of the first power supply body 16 and the second power supply body 17. Fig.11 (b) and Fig.11 (c) The thickness of each member in the above formula (1) and formula (2) is described.

[0157] t i ,t iF1 ,t iF2 for Fig.11 (a) shows the (total) thickness of the intermediate film 20 at each portion. Fig.11 In (a), the intermediate film 20 has the first intermediate film 11, the first adjustment intermediate film 21, and the second intermediate film 12 in any part. Therefore, when the thickness of the first intermediate film 11 is t1, the thickness of the first adjustment intermediate film 21 is t2, and the thickness of the second intermediate film 12 is t3, t i ,t iF1 ,t iF2 Each represents the total of t1 to t3. When the interlayer 20 includes the third interlayer 13, the adjustment interlayer, the auxiliary interlayer 25, etc., the thickness thereof is also included. F1 and t F2 The thickness of the thickest part of the first power supply body 16 and the second power supply body 17 is shown. The thickest part is, for example, Fig.11 The power feeders 16 and 17 shown in (c) include portions of the foil-shaped conductors 36, 26', 37, and 37'.

[0158] (2) First crimping step

[0159] The first pressing step is a step of heating and pressurizing the first glass plate and the second glass plate for pressing. The first pressing step may be a step of placing the laminate obtained in the lamination step in a vacuum bag, clamping the laminate with a pair of rollers, or covering the periphery with a rubber chamber to pressurize and heat the laminate for bonding. The first pressing step is usually performed at a temperature of 50°C to 130°C. The absolute pressure when using a vacuum bag is preferably 36 kPa to 1 kPa.

[0160] (3) Second crimping step

[0161] If necessary, a second pressing step may be further performed after the first pressing step to further firmly press the laminate obtained in the lamination step. The second pressing step is performed by placing the laminate in, for example, an autoclave, controlling the temperature at 110° C. to 150° C. and the absolute pressure at 0.98 MPa to 1.47 MPa, and maintaining the pressure for a predetermined time. The second pressing step is preferably maintained at a higher temperature and pressure than the first pressing step.

[0162] Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited to these examples.

[0163] <Example 1>

[0164] Example 1 is an example of a laminated glass 500 for a vehicle corresponding to the fifth embodiment. As the first glass plate and the second glass plate, light green glass (300 mm×300 mm, thickness 2 mm) commonly used as vehicle glass is used, as the first to third interlayers and the first and second adjustment interlayers, polyvinyl butyral (PVB) films (manufactured by Sekisui Chemical Co., Ltd., thickness 0.38 mm) are used, and as the first and second functional components, suspended particle devices (SPD) (manufactured by Hitachi Chemical Co., Ltd., thickness 0.34 mm) are used. The size of the first to third interlayers is 300 mm×300 mm. As shown in Table 1, the first and second adjustment interlayers have hollow portions corresponding to the size of the first and second functional components, and the portions other than the hollow portions have a predetermined width.

[0165] [Table 1]

[0166]

[0167] In the first and second power supply bodies (thinnest part 0.13 mm, thickest part 0.24 mm), tin-coated copper foil (thickness 0.1 mm) was covered with polyimide (thickness 0.13 mm, width 360 mm) via an epoxy adhesive.

[0168] The laminated glass for a vehicle of Example 1 is obtained by a lamination process, a first pressing process, and a second pressing process. In the lamination process, the second interlayer film, the second adjustment interlayer film, the second functional component electrically connected to the second power supply, the third interlayer film, the first adjustment interlayer film, the first functional component electrically connected to the first power supply, the first interlayer film, and the first glass plate are laminated on the second glass plate in the order of: Fig. 9 and Fig.10 The lower layer is stacked. So, t i =t iF1 =t iF2 =1.9mm, t F1 =t F2 =0.24 mm, satisfying the above equations (1) and (2).

[0169] [evaluate]

[0170] For the laminated glass for vehicles after the second crimping step, the first glass plate is viewed from above to confirm whether bubbles remain in the following areas (a) and (b). When one or more bubbles with a diameter of 1 mm or more are confirmed, it is determined that bubbles remain. Area (a): 20 mm or more inside the periphery of the first functional component (second functional component), Area (b): between the first power supply and the second power supply.

[0171] Then, as shown in Table 2, the samples were evaluated as very good, good, fair, and bad in order from the best. The results are shown in Table 3.

[0172] [Table 2]

[0173]

[0174]

Table 3

[0175]

[0176] In Example 1, when the distance d1 between the first power supply and the second power supply is less than 45 mm and / or the distance d2 from the power supply edge to the periphery of the first functional component (the second functional component) is less than 60 mm, it is confirmed that no bubbles remain in area (a) and area (b) after the second crimping step.

[0177] [Baker test]

[0178] The laminated glass for vehicles of the present invention is also considered to be used for a long time in a high temperature environment. In a high temperature environment, the compressed and dissolved air expands, and there may be greater foaming (residual bubbles) than the stage after the second pressing step or new residual bubbles that have not been confirmed after the second pressing step. Therefore, in Example 1, the laminated glass for vehicles after the second pressing step is placed in an oven, controlled at 100°C to 130°C and heated for 2 hours to conduct an accelerated foaming test.

[0179] [Table 4]

[0180]

[0181] In Example 1, when the distance d1 between the power supply bodies is less than 45 mm or the distance d2 is less than 60 mm, even after the Baker test, it is confirmed that no bubbles remain more than 20 mm inside the periphery of the first functional component (the second functional component) or on at least one side between the first power supply body and the second power supply body.

[0182] Explanation of symbols

[0183] 100, 200, 300, 400, 500 laminated glass

[0184] 101st Glass Plate

[0185] 10a 1st main side

[0186] 10b 2nd main side

[0187] 10s Power supply side

[0188] G Center of gravity

[0189] 111st interlayer film

[0190] 12 Second interlayer film

[0191] 13Third interlayer film

[0192] 14.1 Functional component

[0193] 15. Second functional component

[0194] 16 1st power supply

[0195] 17 Second power supply

[0196] d1 Distance between power supply elements

[0197] d2 Distance from the power supply edge to the periphery of the functional component

[0198] 18 2nd glass plate

[0199] 18c 3rd main side

[0200] 18d 4th main side

[0201] 20Intermediate film

[0202] 211st Adjustment of Interlayer Film

[0203] 22. Adjustment of the interlayer film

[0204] 23.3 Adjustment of the interlayer film

[0205] 25 auxiliary intermediate film

[0206] 36, 36', 37, 37' foil conductor

[0207] 50 shading part

[0208] In addition, the entire contents of the specification, claims, drawings, and abstract of Japanese Patent Application No. 2020-147753 filed on September 2, 2020 are cited herein as a disclosure of the present specification.

Claims

1. A laminated glass for a vehicle, The laminated glass for a vehicle is formed by laminating a first glass plate, an intermediate film and a second glass plate in this order, and is characterized in that: The intermediate film comprises a first intermediate film and a second intermediate film. A first functional member, a second functional member, a first power supply electrically connected to the first functional member, and a second power supply electrically connected to the second functional member are provided between the first intermediate film and the second intermediate film. The first functional component and the second functional component are not present on the same plane, When looking down at the first glass plate, The first functional component and the second functional component do not overlap, The first functional member and the second functional member are arranged inside the periphery of the first glass plate. The first power feeder and the second power feeder intersect only with a power feed side that is one side of the first glass plate and do not overlap within a plane of the first glass plate.

2. The laminated glass for a vehicle according to claim 1, wherein: The intermediate film includes a first adjustment intermediate film, The first adjustment intermediate film is arranged on the periphery of the first functional member.

3. The laminated glass for a vehicle according to claim 2, wherein: The first adjustment intermediate film is arranged on the periphery of the second functional member.

4. The laminated glass for a vehicle according to any one of claims 1 to 3, wherein The first glass plate has a first main surface. When the first glass plate is observed from a cross-sectional perspective including the power supply edge, The distance from the first main surface to the first power supply is the same as the distance from the first main surface to the second power supply. The intermediate film comprises an auxiliary intermediate film, The auxiliary intermediate film is arranged between the first power supply body and the second power supply body.

5. The laminated glass for a vehicle according to claim 1, wherein: The intermediate film includes a second adjustment intermediate film, The second adjustment intermediate film is arranged on the periphery of the second functional member.

6. The laminated glass for a vehicle according to claim 1, wherein: The intermediate film includes a third intermediate film, The third intermediate film is arranged between the first intermediate film and the second intermediate film. The first functional member is disposed on one main surface side of the third intermediate film, The second functional member is disposed on the other main surface side of the third intermediate film.

7. The laminated glass for a vehicle according to claim 1, wherein: The first glass plate has a first main surface. When the first glass plate is observed from a cross-sectional perspective including the power supply edge, A distance from the first main surface to the first power feeder is different from a distance from the first main surface to the second power feeder.

8. The laminated glass for a vehicle according to claim 1, wherein: When looking down at the first glass plate, An inter-power supply distance d1 between the first power supply and the second power supply is less than 100 mm.

9. The laminated glass for a vehicle according to claim 1, wherein: A distance d2 between the power supply edge and the peripheral edge of the first functional member is less than 65 mm.

10. The laminated glass for a vehicle according to claim 1, It has a light shielding portion extending from the power supply side of the first glass plate toward the first functional component, The light shielding portion overlaps with at least a portion of a periphery of the first functional member.

11. The laminated glass for a vehicle according to claim 1, wherein: The first glass plate is in a trapezoidal shape, The power supply side is the longest side or the second longest side of the first glass plate.

12. The laminated glass for a vehicle according to claim 1, wherein: The first glass plate and the second glass plate have no notches.

13. The laminated glass for a vehicle according to claim 1, wherein: The thickness of the first functional member and the second functional member is greater than or equal to 0.15 mm.

14. The laminated glass for a vehicle according to claim 1, wherein: The first functional component and the second functional component are independently one of a light-adjusting layer, a light-emitting layer, and an electric heating layer.

15. The laminated glass for a vehicle according to claim 1, wherein: The distance d1 between the first power supply element and the second power supply element is less than 35 mm.

16. The laminated glass for a vehicle according to claim 1, wherein: A distance d2 between the power supply edge and the peripheral edge of the first functional member is less than 40 mm.

17. A method for manufacturing laminated glass for a vehicle, The present invention is a method for producing a laminated glass for a vehicle in which a first glass plate, an interlayer film and a second glass plate are laminated in this order, characterized in that: It has a lamination step of preparing a laminated body including the first glass plate, the intermediate film, a first functional member connected to a first power supply, a second functional member connected to a second power supply, and the second glass plate; and A first compression bonding step of heating and pressurizing the laminate to perform compression bonding, The intermediate film comprises a first intermediate film and a second intermediate film. The first functional component and the second functional component are not present on the same plane, The lamination step includes arranging the first functional component electrically connected to the first power supply body and the second functional component electrically connected to the second power supply body between the first intermediate film and the second intermediate film, and the first functional component and the second functional component do not overlap when the first glass plate is viewed from above, and the first power supply body and the second power supply body intersect only with the power supply side which is one side of the first glass plate, and the first power supply body and the second power supply body do not overlap within the surface of the first glass plate, In the lamination step, when the first glass sheet is observed from a cross-sectional perspective including the power supply side, the following equations (1) and (2) are satisfied: Formula (1): t i ≥0.8×(t F1 +t iF1 ) Formula (2): t i ≥0.8×(t F2 +t iF2 ) t i : The thickness of the intermediate film between the first power supply body and the second power supply body in the plane direction t F1 : The thickness of the thickest part of the first power supply body t F2 : The thickness of the thickest part of the second power supply body t iF1 : The thickness of the intermediate film at the portion overlapping with the first power supply body t iF2 : The thickness of the intermediate film at the portion overlapping with the second power supply body. 18 . The method for producing a laminated glass for a vehicle according to claim 17 , comprising a second pressing step after the first pressing step.

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