Vehicle window structure

Abstract

Provided is vehicular laminated glass having a dimmable film, wherein deterioration of appearance as viewed from inside and outside the vehicle is suppressed and durability to sliding is improved.　This vehicular laminated glass has a first glass plate and a second glass plate facing opposite each other, an interlayer provided between the first glass plate and the second glass plate, and a dimmable film that is provided inside the interlayer and that is capable of switching visible light transmittance, wherein: the vehicular laminated glass has a lower edge portion in which wiring is connected to the dimmable film, an upper edge portion facing opposite the lower edge portion, and side edge portions connecting the upper edge portion and the lower edge portion; the first glass plate has a first main surface positioned on the opposite side from the interlayer and a second main surface facing the interlayer; the second glass plate has a third main surface facing the interlayer and a fourth main surface positioned on the opposite side from the interlayer; the vehicular laminated glass has a first shielding layer provided between the first main surface and the dimmable film and a second shielding layer positioned on the fourth main surface; at least one of the upper edge portion and the side edge portions is provided with a transmission portion on the peripheral edge portion of the fourth main surface; at least part of the second shielding layer is positioned further inward than the transmission portion in the plane direction; and, in a plan view of the second glass plate, the peripheral edge of the dimmable film in the upper edge portion overlaps the second shielding layer.

Description

[Technical Field]

[0001] This invention relates to laminated glass for vehicles and a window structure for vehicles. [Background technology]

[0002] Laminated glass with a dimmable film that can switch the visible light transmittance is known for use as window glass in vehicles such as automobiles and trains. The dimmable film is, for example, a film of liquid crystal or an electroluminescent element, and is, for example, sealed in an interlayer sandwiched between two glass plates (see, for example, Patent Document 1).

[0003] In laminated glass of this type, the peripheral edges of the light-adjusting layer inside the light-adjusting film may deteriorate due to moisture, impact, etc. Therefore, the peripheral edges of the light-adjusting film are positioned inward in the planar direction compared to the peripheral edges of the glass plate. However, with this arrangement, the peripheral edges of the light-adjusting film are visible from both inside and outside the vehicle, resulting in a deterioration of the appearance when viewed from both the inside and outside.

[0004] Therefore, in order to prevent the edges of the dimming film from being visible from inside or outside the vehicle, a shielding layer may be provided, for example, on the inner surface of a glass panel located on the outside of the vehicle, or on the inner surface of a glass panel located on the inside of the vehicle. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] International Publication No. 2007 / 142319 [Overview of the project] [Problems that the invention aims to solve]

[0006] However, when applying laminated glass as described above to sliding glass such as the side door windows of a vehicle, providing a shielding layer on the inner surface of the glass plate located on the inside of the vehicle deteriorates its durability due to sliding. Specifically, as the laminated glass slides repeatedly, the shielding layer provided on the inner surface of the glass plate located on the inside of the vehicle wears down due to contact with the glass run.

[0007] The present invention has been made in view of the above points, and aims to suppress deterioration of the appearance when viewed from inside and outside the vehicle, as well as to improve durability against sliding, in laminated glass for vehicles having a dimming film. [Means for solving the problem]

[0008] A laminated glass for a vehicle according to one embodiment of the disclosure comprises a first glass plate and a second glass plate facing each other, an interlayer provided between the first glass plate and the second glass plate, and a dimmable film provided inside the interlayer, the dimmable glass having a lower edge portion to which wiring to the dimmable film is connected, an upper edge portion facing the lower edge portion, and a side edge portion connecting the upper edge portion and the lower edge portion, wherein the first glass plate has a first main surface located on the opposite side of the interlayer and a second main surface facing the interlayer The second glass plate has a third main surface facing the interlayer and a fourth main surface located on the opposite side of the interlayer, and has a first shielding layer provided between the first main surface and the dimming film, and a second shielding layer provided on the fourth main surface, with at least one of the side edge and the top edge having a transparent portion at the periphery of the fourth main surface, and at least a part of the second shielding layer being located inward in the planar direction from the transparent portion, and in a plan view of the second glass plate, the periphery of the dimming film at the top edge overlaps with the second shielding layer. The laminated glass for a vehicle according to another embodiment of the disclosure includes a first glass plate and a second glass plate facing each other, an intermediate film provided between the first glass plate and the second glass plate, and a dimming film provided inside the intermediate film and capable of switching the visible light transmittance. The laminated glass for a vehicle further includes a lower side portion to which wiring for the dimming film is connected, an upper side portion facing the lower side portion, and side portions connecting the upper side portion and the lower side portion. The first glass plate has a first main surface located on the side opposite to the intermediate film and a second main surface facing the intermediate film. The second glass plate has a third main surface facing the intermediate film and a fourth main surface located on the side opposite to the intermediate film. There is a first shielding layer between the first main surface and the dimming film, and a second shielding layer on the fourth main surface. It has the following structure A or structure B. In a plan view of the second glass plate, the periphery of the dimming film at the upper side portion overlaps with the second shielding layer. The laminated glass for a vehicle is as described above. Structure A: At least one of the side portions and the upper side portion is provided with a transmission portion at the peripheral portion of the fourth main surface. At least a part of the shielding portion or semi-shielding portion formed by the second shielding layer is located inside in the plane direction than the transmission portion. Structure B: The second shielding layer has a semi-shielding portion extending inward in the plane direction from the periphery of the fourth main surface.

Advantages of the Invention

[0009] According to an embodiment of the disclosure, in the laminated glass for a vehicle having a dimming film, it is possible to suppress deterioration of the appearance when viewed from inside and outside the vehicle, and improve durability against sliding.

Brief Description of the Drawings

[0010] [Figure 1] FIGS. 1A and 1B are diagrams illustrating the laminated glass according to the first embodiment. [Figure 2] FIG. 2 is a partially enlarged view (part 1) of the vicinity of the upper side portion of the laminated glass. [Figure 3] FIG. 3 is a partially enlarged view (part 2) of the vicinity of the upper side portion of the laminated glass. [Figure 4] FIG. 4 is a diagram for explaining the glass run. [Figure 5] FIG. 5 is a partially enlarged view (part 1) showing another example in the vicinity of the upper side of the laminated glass. [Figure 6] FIG. 6 is a partially enlarged view (part 2) showing another example in the vicinity of the upper side of the laminated glass. [Figure 7] FIG. 7 is a partially enlarged view (part 3) showing another example in the vicinity of the upper side of the laminated glass. [Figure 8] FIGS. 8A and 8B are diagrams illustrating the laminated glass according to a modification of the first embodiment. [Figure 9] It is a schematic diagram illustrating a window structure for a vehicle.

MODE FOR CARRYING OUT THE INVENTION

[0011] Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings. In each drawing, the same reference numerals are given to the same components, and redundant descriptions may be omitted. Also, in each drawing, the size and shape may be partially exaggerated for easy understanding of the content of the present invention.

[0012] Note that the vehicle typically refers to an automobile, but includes a moving body capable of mounting a laminated glass, such as a train, a ship, an aircraft, etc.

[0013] In addition, a plan view refers to viewing an object from the direction of the normal line passing through the center of gravity of the main surface of the object, and the shape seen at that time is referred to as a planar shape.

[0014] In addition, the notations "upper" and "lower" refer to the upper and lower sides when the laminated glass is attached to the vehicle. In addition, the notations "upper side portion" and "lower side portion" respectively refer to a region having a predetermined width including the upper side when the laminated glass is attached to the vehicle, and a region having a predetermined width including the lower side, and the notation "side portion" refers to a region having a predetermined width including at least one of the right side and the left side when the laminated glass is attached to the vehicle.

[0015] Furthermore, the outer edge of a given member in a plan view is called the "periphery," and the region in the given member that is adjacent to the "periphery" and has a width is called the "peripheral portion." The term "peripheral portion" encompasses the top edge, bottom edge, and side edge. The peripheral portion may also be the region between the "periphery" before reduction and the "periphery" after reduction when the laminated glass is reduced in size around the center of gravity of the laminated glass. The reduction ratio may be, for example, 99% to 70%, but may also be 95%, 90%, 80%, or 75%.

[0016] [Laminated glass] Figures 1A and 1B illustrate a laminated glass 10 according to the first embodiment. Figure 1A schematically shows the laminated glass as viewed from the normal direction of the second glass plate, and Figure 1B is a partially enlarged cross-sectional view along line AA in Figure 1A.

[0017] As shown in Figure 1B, the laminated glass 10 is a vehicle-mounted laminated glass comprising a first glass plate 11, a second glass plate 12, an interlayer 13, a first shielding layer 14, a second shielding layer 15, and a light-adjusting film 16. The laminated glass 10 has a lower edge portion located on the lower side when the laminated glass 10 is mounted on a vehicle, an upper edge portion facing the lower edge portion and located on the upper side when the laminated glass 10 is mounted on a vehicle, and a pair of side edges connecting the lower edge portion and the upper edge portion. Figure 1B is a cross-sectional view of the vicinity of the upper edge portion of the laminated glass 10.

[0018] The first glass plate 11 and the second glass plate 12 are bonded together via an interlayer 13. The first glass plate 11 is positioned on the first side, which will be the exterior side when the laminated glass 10 is installed in the vehicle, and the second glass plate 12 is positioned on the second side, which will be the interior side when the laminated glass 10 is installed in the vehicle.

[0019] In Figures 1A and 1B, for the sake of explanation, the laminated glass 10 is shown with its actual curved shape omitted and its external shape simplified. However, the laminated glass 10 may be curved, not just the planar shape (non-curved shape) shown in Figure 1A. For example, the laminated glass 10 may be a single-curve shape that is curved in either the vertical or horizontal direction when installed on a vehicle, or a double-curve shape that is curved in both the vertical and horizontal directions. However, the single-curve shape and the double-curve shape are not limited to shapes that are curved in the vertical and / or horizontal directions when installed on a vehicle. The single-curve shape includes shapes that are curved in only one direction. The double-curve shape includes shapes that are curved in two or more different directions.

[0020] When the laminated glass 10 is curved, it is preferable that the laminated glass 10 is curved so as to be convex toward the outside of the vehicle. That is, it is preferable that the first glass plate 11 is curved so as to be convex toward the opposite side of the interlayer 13, and the second glass plate 12 is curved so as to be convex toward the interlayer 13. In Figure 1A, the laminated glass 10 is shown as roughly rectangular in plan view, but the laminated glass 10 is not limited to being roughly rectangular and may be any shape. Here, "roughly" means that geometric strictness in terms of linearity, number and size of corners, etc., is not required. The laminated glass 10 may be roughly trapezoidal, roughly triangular, etc. When the laminated glass 10 is roughly triangular, the laminated glass 10 has one side and one side portion.

[0021] Laminated glass 10 can be used as vehicle windows or interior partitions. Laminated glass 10 can be used as automotive windows, for example, in windshields, rear windows, quarter windows, roofs, and extra windows. Furthermore, laminated glass 10 is particularly suitable for use as vehicle windows that can slide vertically. Examples of such windows include front side door windows and rear side door windows of automobiles.

[0022] In Figure 1A, the beltline BL is the boundary line between the laminated glass 10 and the vehicle's door panel when the laminated glass 10 is installed in the vehicle. Figure 1A schematically shows the positional relationship between the laminated glass 10 and the beltline BL when the vertically slidable laminated glass 10 is in a completely closed state (at its uppermost position).

[0023] The first glass plate 11 has a first main surface 111 on the side opposite to the interlayer 13 and a second main surface 112 on the side facing the interlayer 13. The second glass plate 12 has a third main surface 123 on the side facing the interlayer 13 and a fourth main surface 124 on the side opposite to the interlayer 13. When the laminated glass 10 is installed in a vehicle, the first main surface 111 is the surface located furthest outside the vehicle, and the fourth main surface 124 is the surface located furthest inside the vehicle.

[0024] If the laminated glass 10 is curved, the minimum value of the radius of curvature of the laminated glass 10 is preferably 500 mm or more and 100,000 mm or less. The radii of curvature of the first glass plate 11 and the second glass plate 12 may be the same or different. If the radii of curvature of the first glass plate 11 and the second glass plate 12 are different, the radius of curvature of the second glass plate 12 is smaller than the radius of curvature of the first glass plate 11.

[0025] The first glass plate 11 and the second glass plate 12 are a pair of glass plates facing each other, and the interlayer 13 and the light-adjusting film 16 are located between the pair of glass plates. The first glass plate 11 and the second glass plate 12 are fixed together with the interlayer 13 and the light-adjusting film 16 sandwiched between them. The interlayer 13 is a film that joins the first glass plate 11 and the second glass plate 12.

[0026] In the laminated glass 10, the outer peripheral surface of the interlayer 13 is exposed at least at the upper edge. Therefore, it is preferable that the outer peripheral surface of the interlayer 13 is edge-treated. That is, it is preferable that the outer peripheral surface of the interlayer 13 is treated so as not to protrude significantly from the outer peripheral surfaces of the first glass plate 11 and the second glass plate 12. It is preferable that the amount of protrusion of the outer peripheral surface of the interlayer 13 from the outer peripheral surfaces of the first glass plate 11 and the second glass plate 12 is 1 mm or less, in terms of not impairing the appearance. It is more preferable that the amount of protrusion of the outer peripheral surface of the interlayer 13 from the outer peripheral surfaces of the first glass plate 11 and the second glass plate 12 is 0.5 mm or less, and even more preferable that it is 0.15 mm or less.

[0027] Furthermore, the outer peripheral surface of the interlayer 13 may be embedded inward from the outer peripheral surface of the first glass plate 11 and the second glass plate 12. An embedding depth of 3 mm or less of the outer peripheral surface of the interlayer 13 relative to the outer peripheral surface of the first glass plate 11 and the second glass plate 12 is preferable in that it does not impair the strength of the laminated glass. More preferably, the embedding depth of 2 mm or less of the outer peripheral surface of the interlayer 13 relative to the outer peripheral surface of the first glass plate 11 and the second glass plate 12 is even more preferable, and 1 mm or less. Details of the first glass plate 11, the second glass plate 12, and the interlayer 13 will be described later.

[0028] The first shielding layer 14 is an opaque layer and is provided, for example, on at least the upper edge of the laminated glass 10, between the first main surface 111 and the dimming film 16. The first shielding layer 14 may be provided only on the upper edge of the laminated glass 10, or it may be provided on one or both of the side edges in addition to the upper edge of the laminated glass 10. If the first shielding layer 14 is provided on both side edges of the laminated glass 10, the first shielding layer 14 may be provided only on the upper side of the beltline BL. However, the first shielding layer 14 may extend on both side edges of the laminated glass 10 towards the lower side of the beltline BL.

[0029] The first shielding layer 14 may form a shielding portion 130 as shown in Figures 1A and 1B, or it may form a semi-shielding portion in part or all of it. Similarly, the second shielding layer 15, which will be described later, may also form a shielding portion 130 as shown in Figures 1A and 1B, or it may form a semi-shielding portion in part or all of it. That is, the shielding portion 130 and the semi-shielding portion are each formed by at least one of the first shielding layer 14 and the second shielding layer 15. The shielding portion 130 provides a shielding effect in all parts of a predetermined area. The semi-shielding portion provides a shielding effect in a part of a predetermined area. In other words, the shielding portion 130 does not include the dot area or stripe area described later, while the semi-shielding portion includes the dot area, stripe area, etc. described later.

[0030] In the example shown in Figure 1A, the first shielding layer 14 is provided on the second main surface 112 at the upper edge of the laminated glass 10. Furthermore, in a plan view of the first glass plate 11, both ends of the first shielding layer 14 provided at the upper edge extend to both sides of the laminated glass 10 and are provided only on the upper edge side of the beltline BL.

[0031] The second shielding layer 15 is an opaque layer and is provided, for example, on the fourth main surface 124 at least on the upper edge of the laminated glass 10. In a plan view of the second glass plate 12 at the upper edge of the laminated glass 10, the distance L between the lower edge (inner edge) of the second shielding layer 15 and the lower edge (inner edge) of the first shielding layer 14 is, for example, 0 mm or more and 10 mm or less. A distance L of 10 mm or less is preferable because the shielding layer is less noticeable and good visibility is easier to ensure. The distance L may also be 8 mm or less, or 6 mm or less. Furthermore, if the distance L is 0 mm or more, the boundary between the inner edge of the first shielding layer 14 and the inner edge of the second shielding layer 15 is difficult to see from inside and outside the vehicle. A distance L greater than 0 mm is preferable because it reduces the influence of distortion (edge ​​distortion) that occurs at the boundary between the area with the shielding layer and the area without the shielding layer, more preferably 1 mm or more, and even more preferably 2 mm or more.

[0032] The distance L is not limited to the case where the inner edge of the first shielding layer 14 is located below (inside the plane) the inner edge of the second shielding layer 15, as illustrated in Figure 1B, but is also the case where the inner edge of the second shielding layer 15 is located below (inside the plane) the inner edge of the first shielding layer 14. In this case, the distance L may be measured using a plan view of the first glass plate 11 instead of a plan view of the second glass plate 12.

[0033] At the upper edge of the laminated glass 10, the width W of the second shielding layer 15. A The width of the second shielding layer 15 is preferably 3 mm or more and 35 mm or less. A If the width is 3 mm or more, the peripheral edge of the dimming film 16 can be sufficiently shielded. Width W of the second shielding layer 15 A However, if the width is 35 mm or less, the deterioration of appearance due to the second shielding layer 15 can be suppressed. At the upper edge of the laminated glass 10, the width W of the second shielding layer 15 A The width W of the second shielding layer 15 is more preferably 5 mm or more, even more preferably 8 mm or more, even more preferably 10 mm or more, and particularly preferably 15 mm or more. A It is more preferable that the width is 30 mm or less. Within this range, the peripheral edge of the dimming film 16 can be shielded more reliably. Note that the width W of the second shielding layer 15 A The width W of the second shielding layer 15 is not constant and may vary in parts. A If the change is partial, it is preferable that the change is gradual.

[0034] The second shielding layer 15 may be provided only on the upper edge of the laminated glass 10, or it may be provided on one or both of the side edges in addition to the upper edge of the laminated glass 10. When the second shielding layer 15 is provided on both side edges of the laminated glass 10, the second shielding layer 15 may be provided only on the upper side of the beltline BL. However, the second shielding layer 15 may extend on both side edges of the laminated glass 10 toward the lower side of the beltline BL.

[0035] In the example of FIG. 1A, the second shielding layer 15 is provided on the fourth main surface 124 at the upper side portion of the laminated glass 10. Further, both ends of the second shielding layer 15 provided at the upper side portion in plan view of the second glass plate 12 extend to both side portions of the laminated glass 10 and are provided only on the upper side portion side with respect to the belt line BL.

[0036] In the second glass plate 12, a transmission portion 128 is provided at the peripheral edge portion of the fourth main surface 124. The transmission portion 128 is a portion where the fourth main surface 124 is exposed at the peripheral edge portion of the fourth main surface 124. However, portions where the fourth main surface 124 is exposed within the dot region and stripe region described later (that is, gaps between dots and between stripes) shall not be included in the transmission portion 128. The second shielding layer 15 is located below the transmission portion 128 at the upper side portion of the laminated glass 10. The periphery of the second shielding layer 15 is in contact with the transmission portion 128.

[0037] In the example of FIG. 1A, the shielding portion 130 is formed by the first shielding layer 14 and the second shielding layer 15. More specifically, the shielding portion 130 is formed only by the first shielding layer 14 in a portion overlapping the transmission portion 128 in plan view of the first glass plate 11, and is formed by the first shielding layer 14 and the second shielding layer 15 in a portion not overlapping the transmission portion 128 (below the transmission portion 128).

[0038] At the upper side portion of the laminated glass 10, the width W of the transmission portion 128 B is preferably 5 mm or more and 25 mm or less. When the width W of the transmission portion 128 B is 5 mm or more, when using the laminated glass 10 as a sliding window, it is possible to prevent the second shielding layer 15 provided at the upper side portion from contacting the glass run. When the width W of the transmission portion 128 B is 25 mm or less, it is possible to suppress deterioration of the appearance viewed from inside the vehicle due to the second shielding layer 15. At the upper side portion of the laminated glass 10, the width W of the transmission portion 128 BThe width W of the transparent portion 128 is more preferably 20 mm or less, even more preferably 15 mm or less, and even more preferably 10 mm or less. Within this range, the deterioration of the appearance as seen from inside the vehicle due to the second shielding layer 15 can be further suppressed. B The width W of the transparent section 128 may be 6 mm or more, 7 mm or more, or 8 mm or more. B The width W of the transparent portion 128. B If the change is partial, it is preferable that the change is gradual.

[0039] When the second shielding layer 15 is provided on one or both sides of the side portion, the width of the permeable portion 128 on the side portion where the second shielding layer 15 is provided may be 0 mm or more and 3 mm or less. On the side portion where the second shielding layer 15 is provided, the width of the permeable portion 128 may be 2 mm or less, or 1 mm or less. In other words, when the second shielding layer 15 is provided on one or both sides of the side portion, the permeable portion 128 may not be provided on the side portion where the second shielding layer 15 is provided.

[0040] The reason why a transparent section 128 is not required on the side edge where the second shielding layer 15 is provided is that even if the second shielding layer 15 on the side edge comes into contact with the glass run and gets scratched during raising and lowering, the second shielding layer 15 on the side edge is not exposed from the glass run and therefore cannot be seen from inside the vehicle.

[0041] However, since sliding noise may occur when the second shielding layer 15 and the glass run slide against each other, a transparent portion 128 with a width sufficient to avoid contact with the glass run may also be provided on the side. In this case, the width W of the transparent portion 128 on the side of the laminated glass 10 B It is preferable that the width of the transparent portion 128 is between 5 mm and 25 mm. B If the width is 5 mm or more, when the laminated glass 10 is used as a sliding window, the second shielding layer 15 provided on the side edge can be prevented from coming into contact with the glass run. Therefore, the scratch resistance of the laminated glass 10 is improved. Width W of the transparent portion 128 BIf the width is 15 mm or less, the deterioration of the appearance as seen from inside the vehicle due to the second shielding layer 15 can be suppressed. At the side edge of the laminated glass 10, the width W of the transparent portion 128 B It is more preferable that the second shielding layer 15 is 20 mm or less, even more preferable that it is 15 mm or less, and even more preferable that it is 10 mm or less. Within this range, the deterioration of the appearance as seen from inside the vehicle due to the second shielding layer 15 can be further suppressed. Up to this point, examples have been shown in which the second shielding layer 15 is located below (inward in plane) the transparent portion 128 at least on the upper edge of the laminated glass 10. However, it is not limited to this, and the second shielding layer 15 may be located inward in plane than the transparent portion 128 on only one or both of the side edges of the laminated glass 10. For example, on the side edge of the laminated glass 10, the width W of the transparent portion 128 B However, it is between 5 mm and 25 mm, and at the top edge, the width W of the transparent portion 128. B However, it may be 3 mm or less. In this case, the width W of the transparent portion 128 at the top edge. B It may be 2mm or less, or 1mm or less.

[0042] In the examples shown in Figures 1A and 1B, in a plan view of the second glass plate 12, the periphery of the dimming film 16 on the upper edge of the laminated glass 10 overlaps with the first shielding layer 14. Also, in a plan view of the second glass plate 12, the periphery of the dimming film 16 on the upper edge of the laminated glass 10 overlaps with the second shielding layer 15. This prevents the periphery of the dimming film 16 from being visible from both the inside and outside of the vehicle.

[0043] It is preferable that the first shielding layer 14 is positioned so as to overlap the entire transparent portion 128 in a plan view of the second glass plate 12. That is, it is preferable that the periphery of the first shielding layer 14 coincides with the periphery of the second main surface 112 of the first glass plate 11. This ensures that the periphery of the dimming film 16 is not visible from the outside of the vehicle. However, the first shielding layer 14 does not overlap the entire transparent portion 128 in a plan view of the second glass plate 12; in other words, it overlaps with a part of the transparent portion 128, and the periphery of the second main surface 112 of the first glass plate 11 may have a gap narrower than the transparent portion 128. In other words, the distance from the periphery of the first shielding layer 14 to the periphery of the first glass plate 11 should be less than 5 mm, preferably 2 mm or less, and more preferably 1 mm or less.

[0044] The first shielding layer 14 and the second shielding layer 15 are, for example, opaque colored ceramic layers. The color is arbitrary, but dark colors such as black, brown, gray, dark blue, or white are preferred, with black being more preferred. The first shielding layer 14 and the second shielding layer 15 may also be a light-shielding colored film, or a combination of a colored film and a colored ceramic layer. The colored film may be integrated with an infrared reflective film or the like. In addition, in the interlayer 13, at least the portion located on the outside of the vehicle side of the light-adjusting film 16 may be a colored interlayer. In this case, the colored interlayer located on the outside of the vehicle side of the light-adjusting film 16 functions as the first shielding layer 14.

[0045] The width of the first shielding layer 14 in a plan view is, for example, about 10 mm to 100 mm. More preferably, the width of the first shielding layer 14 in a plan view is 20 mm or more. More preferably, the width of the first shielding layer 14 in a plan view is 80 mm or less, even more preferably 60 mm or less, particularly preferably 50 mm or less, and most preferably 40 mm or less. The presence of an opaque first shielding layer 14 on the laminated glass 10 allows the peripheral edge of the dimming film 16 to be concealed even if it deteriorates. Furthermore, even when an adhesive made of urethane or other resin is used to hold the peripheral edge of the laminated glass 10 to the vehicle body, deterioration of the adhesive due to ultraviolet rays can be suppressed.

[0046] The first shielding layer 14 and the second shielding layer 15 can be formed, for example, by applying a ceramic color paste containing a molten glass frit containing a black pigment onto a glass plate by screen printing or the like, and then firing it. However, the method for forming the first shielding layer 14 and the second shielding layer 15 is not limited to this method. The first shielding layer 14 and the second shielding layer 15 may also be formed, for example, by applying an organic ink containing a black or dark-colored pigment onto a glass plate by screen printing or the like, and then drying it.

[0047] The dimmable film 16 is an element that can switch the visible light transmittance of the laminated glass 10. At the lower edge of the laminated glass 10, wiring 17 is connected to the dimmable film 16 for supplying power to the dimmable film 16 from outside the laminated glass 10. When voltage is applied to the dimmable film 16 via wiring 17 from a power source such as a battery, the visible light transmittance of the dimmable film 16 switches according to the applied voltage. Even when the laminated glass 10 is installed in the vehicle and the laminated glass 10 is completely closed, the wiring 17 is located below the beltline BL. Therefore, when the laminated glass 10 is installed in the vehicle, the wiring 17 is not visible.

[0048] The dimming film 16 is enclosed within the interlayer 13. That is, the dimming film 16 is surrounded by the interlayer 13. The planar shape of the dimming film 16 is smaller than the planar shape of the laminated glass 10. That is, the periphery of the dimming film 16 is located inward in the planar direction from the periphery of the second main surface 112 of the first glass plate 11 and the periphery of the third main surface 123 of the second glass plate 12.

[0049] The dimmable film 16 includes, for example, two transparent substrates with conductive layers facing each other, and a dimmable layer disposed between the two transparent substrates. The dimmable layer is, for example, one or more selected from a suspension particle device, polymer dispersed liquid crystal, polymer network liquid crystal, guest host liquid crystal, photochromic, electrochromic, and electrokinetic. Preferably, the dimmable layer is one or more selected from a suspension particle device, polymer dispersed liquid crystal, polymer network liquid crystal, and guest host liquid crystal. The thickness of the dimmable film 16 is, for example, 0.1 mm or more and 1 mm or less. The thickness of the dimmable film 16 may be 0.8 mm or less, or 0.5 mm or less. The thickness of the dimmable film 16 may also be 0.3 mm or more.

[0050] As shown in Figure 2, the dimming film 16 includes a dimming layer 163 disposed between a transparent substrate 161 with a conductive layer 162 and a transparent substrate 165 with a conductive layer 164, and its outer peripheral surface may be sealed with a sealing material 166. The sealing material 166 is a resin or adhesive tape. Sealing means surrounding at least the outer peripheral surface of the dimming layer 163 with a predetermined sealing material 166 so that the outer peripheral surface of the dimming layer 163 does not come into contact with air or the interlayer 13. Sealing the outer peripheral surface of the dimming film 16 can suppress deterioration that occurs at the periphery of the dimming film 16. The resin is preferably a curing resin such as an acrylic, epoxy, or silicone type. The curing resin may be a resin that hardens with heat, light, or moisture, or a two-component curing resin consisting of a main material and a hardener. The color of the curing resin is preferably transparent, but it is not limited to transparent and may be black or white. Suitable base materials for adhesive tapes include polyethylene terephthalate (PET), polyethylene, polypropylene, polyimide, polycarbonate, polyvinyl chloride, and polytetrafluoroethylene. Suitable adhesive materials for adhesive tapes include acrylic, silicone, and urethane resins.

[0051] As shown in Figure 3, the dimensions of the transparent substrate 161 with conductive layer 162 and the transparent substrate 165 with conductive layer 164, which face each other, may be different. Specifically, one of the transparent substrate 161 with conductive layer 162 and the transparent substrate 165 with conductive layer 164 may be larger than the other, and their peripheral edges may not overlap in a plan view, a so-called "half-cut" design. It is preferable that the peripheral edge of the dimming film 16 be half-cut in order to make it easier to hold after the curing resin that will become the sealing material 166 is applied.

[0052] The sealing width of the dimming film 16 in a plan view is preferably 2 mm or more and 20 mm or less. By making the sealing width 2 mm or more, deterioration of the edges of the dimming film can be sufficiently suppressed. By making the sealing width 20 mm or less, deterioration of appearance due to the first shielding layer 14 and the second shielding layer 15 can be reduced.

[0053] In a plan view of the second glass plate 12, the distance X (see Figure 1B) between the periphery of the second shielding layer 15 (in-plane and out-plane periphery) and the periphery of the dimming film 16 at the upper edge of the laminated glass 10 is preferably 10 mm or less. If the distance X is 10 mm or less, deterioration of the appearance as seen from inside the vehicle due to the second shielding layer 15 can be suppressed. In a plan view of the second glass plate 12, the distance X may be 0 mm. The distance X may be considered positive from the in-plane out-plane direction to the in-plane direction. In other words, at the upper edge of the laminated glass 10, the distance X is preferably 0 mm or more. Note that the distance X may also be applied to the side edges of the laminated glass 10 as needed.

[0054] Figure 4 is a diagram illustrating the glass run. The glass run 130 shown in Figure 4 is a sealing component made of resin or the like that is attached to the window frame of the vehicle, and it seals the gap between the laminated glass 10 and the window frame of the vehicle, preventing noise, wind, rain, etc. from entering the vehicle. The glass run 130 is provided in contact with the top edge and both sides of the laminated glass 10, and both sides of the laminated glass 10 move up and down while being held in place by the glass run 130. The following description will mainly focus on the top edge of the laminated glass 10, but the same can be applied to one or both of the side edges. When the laminated glass 10 slides to the top, the top edge of the laminated glass 10 is held in place by the glass run 130, as shown in Figure 4. Even when the laminated glass 10 slides to the top, the second shielding layer 15 does not come into contact with the glass run 130. In other words, the glass run 130 contacts only the transparent portion 128 of the second shielding layer 15 of the fourth main surface 124 of the second glass plate 12. The portion of the glass run 130 that contacts only the transparent portion 128 of the second shielding layer 15 of the fourth main surface 124 of the second glass plate 12 may be only the top edge, only one or both of the side edges, or one or both of the top edge and side edges.

[0055] Thus, in the laminated glass 10, a transparent portion 128 is provided at the upper edge, on the peripheral edge of the fourth main surface 124 of the second glass plate 12. The width W of the transparent portion 128 is... B The setting is such that even when the laminated glass 10 moves to the top, the second shielding layer 15 does not come into contact with the glass run 130. This prevents the second shielding layer 15 from being damaged by abrasion when rubbing against the glass run 130 at the top edge of the laminated glass 10, even when the laminated glass 10 is attached to a vehicle and repeatedly moves up and down. In other words, when the laminated glass 10 is used as sliding glass, its durability against sliding can be improved. The portion of the laminated glass 10 parallel to the sliding direction rubs against the glass run 130 for a long time and frequently. Therefore, by providing a transparent portion 128 on one or both of the side edges of the laminated glass 10, the portion of the second shielding layer 15 provided on one or both of the side edges does not come into contact with the glass run 130 when the laminated glass 10 slides, improving the scratch resistance of the laminated glass 10.

[0056] Furthermore, in the laminated glass 10, a first shielding layer 14 is provided at the upper edge between the first main surface 111 of the first glass plate 11 and the dimming film 16. As a result, the periphery of the dimming film 16 cannot be seen from the outside of the vehicle, thus suppressing deterioration of the appearance when viewed from outside the vehicle.

[0057] Furthermore, in the laminated glass 10, a second shielding layer 15 is provided on the in-plane inner side of the transparent portion 128 on the fourth main surface 124 of the second glass plate 12, so as to overlap with the periphery of the dimming film 16 at the upper edge of the laminated glass 10 when viewed from above. As a result, the periphery of the dimming film 16 cannot be seen from inside the vehicle, thus suppressing deterioration of the appearance when viewed from inside the vehicle. Note that the overlap referred to here also includes the case where X=0 in Figure 1B.

[0058] Furthermore, in the laminated glass 10, the width W of the second shielding layer 15 A [mm] and the aforementioned distance X[mm] are W A It is preferable that -X≧5 be satisfied. This allows the deteriorated portion to be shielded even if the peripheral portion of the dimming film 16 deteriorates over time, thereby suppressing deterioration of the appearance when viewed from inside the vehicle. The deterioration of the dimming film 16 over time is caused by moisture and components of the interlayer 13 penetrating from the peripheral portion of the dimming film 16 inward. As a result of their investigation, the inventors found that although the color changes in the deteriorated portion of the dimming film 16, the growth of the width of the deteriorated portion saturates at a certain point and does not widen any further. Therefore, W A By providing the second shielding layer 15 such that -X≧5 is satisfied, the deteriorated portion of the dimming film 16 can be shielded even as time passes.

[0059] From the perspective of shielding the deteriorated portion of the dimming film 16, W A The value of -X should be 5 or greater. A If the value of -X becomes too large, the width of the second shielding layer 15 becomes excessively wide, reducing the visibility as a vehicle glass. Therefore, W A The value of -X is preferably 35 or less, for example.

[0060] Figures 5 to 7 are enlarged partial views showing other examples near the upper edge of laminated glass. As shown in Figure 5, the first shielding layer 14 may have a dot region 141. That is, the first shielding layer 14 may have a semi-shielding portion 134, and the semi-shielding portion 134 may have a dot region 141. Note that in Figure 5, the first shielding layer 14 has a shielding portion 130 in addition to the semi-shielding portion 134 (dot region 141). Also, as shown in Figures 6 and 7, the first shielding layer 14 may have a stripe region 142. The semi-shielding portion 134 may have a stripe region 142. Note that in Figures 6 and 7, the first shielding layer 14 also has a shielding portion 130 in addition to the semi-shielding portion 134 (stripe region 142). In a plan view of the second glass plate 12, the periphery of the second shielding layer 15 (for example, the inner periphery within the plane) may overlap with the dot region 141 or stripe region 142 of the first shielding layer 14. In this case, the periphery of the second shielding layer 15 becomes less conspicuous, which is preferable in terms of appearance.

[0061] The second shielding layer 15 may have a dot region 141 or a stripe region 142. That is, the second shielding layer 15 may have a semi-shielding portion 134, and the semi-shielding portion 134 may have a dot region 141 or a stripe region 142. In this case, even if the dot region 141 overlaps with the periphery of the dimming film 16 in a plan view of the second glass plate 12, the effect of shielding the periphery of the dimming film 16 can be obtained, as in the cases of Figures 1A and 1B. In a plan view of the first glass plate 11, the periphery of the first shielding layer 14 (for example, the inner periphery in the plane) may overlap with the dot region 141 or stripe region 142 of the second shielding layer 15. In this case, the periphery of the first shielding layer 14 becomes less noticeable, which is preferable in terms of appearance.

[0062] The dot region 141 is an area in plan view where multiple dots are scattered along the periphery of the first shielding layer 14. In the dot region 141, the shape and size of the dots can be determined as needed, but for example, they may be circular with a diameter of about 0.5 mm to 2.5 mm, or semicircular with a diameter of half that size. In the dot region 141, in plan view, each dot is arranged in multiple rows at equal intervals. The size and density of the dots may be varied in each row. For example, the density of the dots may be adjusted so that the dots become sparser towards the top or bottom of the laminated glass 10, thereby forming a gradient pattern. The presence of the dot region 141 in the first shielding layer 14 improves the design of the laminated glass 10.

[0063] The striped area 142 is a region in plan view where multiple lines are spaced apart along the periphery of the first shielding layer 14. In the striped area 142, the multiple lines may be substantially parallel to the periphery of the first shielding layer 14, or they may have a certain angle. The number and width of the lines can be determined as needed, but for example, the width of the lines may be 0.1 mm to 89.7 mm, and the spacing between the lines may be 0.1 mm to 89.7 mm. The density of the lines may be adjusted so that the lines become sparser towards the top or bottom of the laminated glass 10, thereby forming a gradient pattern. The presence of the striped area 142 in the first shielding layer 14 improves the design of the laminated glass 10.

[0064] Furthermore, if the first shielding layer 14 has a dot region 141, the periphery of the dot region 141 near the shielding portion 130 may be a line connecting the tips of the dots that are furthest from the periphery of the first glass plate 11. If the first shielding layer 14 has a stripe region 142, the periphery of the stripe region 142 near the shielding portion 130 may be a line that is furthest from the periphery of the first glass plate 11 (if the line has a certain angle, a line connecting the tips of the lines). The same applies to the second shielding layer 15. The shielding layers near the top edge of the laminated glass have been described above using Figures 5 to 7, but the dot region 141 and the stripe region 142 may be provided only on the top edge of the laminated glass, on one or both side edges, or on the top edge and one or both side edges.

[0065] Figures 8A and 8B illustrate laminated glass according to a modified example of the first embodiment. Figure 8A schematically shows the laminated glass as viewed from the direction normal to the second glass plate, and Figure 8B is a partially enlarged cross-sectional view along line AA in Figure 8A.

[0066] As shown in Figure 8B, the laminated glass 20 is a vehicle-mounted laminated glass comprising a first glass plate 11, a second glass plate 12, an interlayer 13, a first shielding layer 14, a second shielding layer 15, and a light-adjusting film 16. The laminated glass 20 has a lower edge portion located on the lower side when the laminated glass 20 is mounted on a vehicle, an upper edge portion facing the lower edge portion and located on the upper side when the laminated glass 20 is mounted on a vehicle, and a pair of side edges connecting the lower edge portion and the upper edge portion. Figure 8B is a cross-sectional view of the vicinity of the upper edge portion of the laminated glass 20.

[0067] Laminated glass 20 differs from laminated glass 10 in that, in the second glass plate 12, there is no transparent portion at the periphery of the fourth main surface 124. Furthermore, laminated glass 20 differs in that the second shielding layer has a semi-shielding portion 134 extending inward in the planar direction from the periphery of the fourth main surface 124. For all other matters, since they are the same as laminated glass 10, the explanation for laminated glass 10 will be used.

[0068] In the examples shown in Figures 8A and 8B, the first shielding layer 14 has a shielding portion 130. The second shielding layer 15 also has a semi-shielding portion 134.

[0069] In a plan view of the second glass plate 12, the periphery of the dimming film 16 on the upper edge of the laminated glass 20 overlaps with the first shielding layer 14. Also, in a plan view of the second glass plate 12, the periphery of the dimming film 16 on the upper edge of the laminated glass 20 overlaps with the second shielding layer 15. Therefore, it is possible to prevent the periphery of the dimming film 16 from being visible from both the inside and outside of the vehicle.

[0070] Furthermore, on the fourth main surface 124 of the second glass plate 12, the second shielding layer 15 has a semi-shielding portion 134 in the area in contact with the glass run. Therefore, sliding noise due to friction between the glass run and the second shielding layer 15 is more easily reduced than when the second shielding layer 15 forms a shielding portion.

[0071] Here, the first glass plate 11, the second glass plate 12, and the interlayer 13 will be described in detail. Although the following explanation uses laminated glass 10, the same explanation can be applied to laminated glass 20.

[0072] [Glass plate] The first glass plate 11 and the second glass plate 12 may be formed from inorganic glass or organic glass. Examples of inorganic glass include soda-lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, and quartz glass, without particular limitation. The first glass plate 11, located on the outside of the laminated glass 10, is preferably made of inorganic glass from the viewpoint of scratch resistance, and preferably made of soda-lime glass from the viewpoint of moldability. When the first glass plate 11 and the second glass plate 12 are made of soda-lime glass, clear glass, green glass containing a predetermined amount or more of iron, and UV-cut green glass can be suitably used. Furthermore, at least one of the first glass plate 11 and the second glass plate 12 may be so-called privacy glass having a dark color such as gray. Privacy glass is described in detail, for example, in International Publication No. 2015 / 088026, the contents of which can be incorporated herein by reference.

[0073] Inorganic glass may be either untempered glass or tempered glass. Untempered glass is made by forming molten glass into a sheet and slowly cooling it. Tempered glass is made by forming a compressive stress layer on the surface of untempered glass.

[0074] Tempered glass may be either physically tempered glass, such as air-cooled tempered glass, or chemically tempered glass. In the case of physically tempered glass, the glass surface can be strengthened by creating a compressive stress layer on the glass surface due to the temperature difference between the glass surface and the inside of the glass, through operations other than slow cooling, such as rapidly cooling a uniformly heated glass plate from a temperature near its softening point during bending.

[0075] In the case of chemically strengthened glass, for example, the glass surface can be strengthened by generating compressive stress on the glass surface after bending, using methods such as ion exchange. Furthermore, glass that absorbs ultraviolet or infrared rays may be used, and although the glass plate is preferably transparent, a glass plate that is colored to an extent that does not impair transparency may also be used.

[0076] On the other hand, examples of materials for organic glass include polycarbonate, acrylic resins such as polymethyl methacrylate, polyvinyl chloride, and polystyrene.

[0077] The molding method for the first glass plate 11 and the second glass plate 12 is not particularly limited. For example, in the case of inorganic glass, it is preferable to use glass plates molded by the float method or the like. The shapes of the first glass plate 11 and the second glass plate 12 are not limited to rectangular or trapezoidal shapes, and may be processed into various shapes and curvatures.

[0078] The thickness of the first glass plate 11 is preferably 1.1 mm or more and 3 mm or less at its thinnest part. If the thickness of the first glass plate 11 is 1.1 mm or more, the strength such as resistance to flying stones is sufficient, and if it is 3 mm or less, the mass of the laminated glass 10 does not become too large, which is preferable in terms of vehicle fuel efficiency. The thickness of the first glass plate 11 is more preferably 1.8 mm or more and 2.8 mm or less at its thinnest part, even more preferably 1.8 mm or more and 2.6 mm or less, even more preferably 1.8 mm or more and 2.2 mm or less, and even more preferably 1.8 mm or more and 2.0 mm or less.

[0079] The thickness of the second glass plate 12 is preferably 0.3 mm or more and 2.3 mm or less. If the thickness of the second glass plate 12 is 0.3 mm or more, it is easy to handle, and if it is 2.3 mm or less, the mass does not become too large.

[0080] Furthermore, if the thickness of the second glass plate 12 is inappropriate, forming two glass plates with particularly deep curves as the first glass plate 11 and the second glass plate 12 will result in a mismatch in the shapes of the two plates, which will significantly affect the glass quality, such as residual stress after compression.

[0081] However, by setting the thickness of the second glass plate 12 to 0.3 mm or more and 2.3 mm or less, glass quality such as residual stress can be maintained. Setting the thickness of the second glass plate 12 to 0.3 mm or more and 2.3 mm or less is particularly effective in maintaining glass quality in glass with deep curvature. The thickness of the second glass plate 12 is more preferably 0.5 mm or more and 2.1 mm or less, and even more preferably 0.7 mm or more and 1.9 mm or less. Within this range, the above effects become even more pronounced.

[0082] A coating having water-repellent, ultraviolet and infrared-cutting functions, or low-reflectivity and low-emissivity properties may be applied to the outer surface of the first glass plate 11 and / or the second glass plate 12. In addition, a coating having ultraviolet and infrared-cutting, low-emissivity properties, visible light absorption, or coloring properties may be applied to the side of the first glass plate 11 and / or the second glass plate 12 that is in contact with the interlayer 13.

[0083] When the first glass plate 11 and the second glass plate 12 are formed from curved inorganic glass, the first glass plate 11 and the second glass plate 12 are bent after being formed by the float method or the like, and before being bonded with the interlayer film 13. Bending is performed by softening the glass by heating. The heating temperature of the glass during bending should be controlled to approximately 550°C to 700°C. Gravity forming, press forming, roller forming, etc. may be used for bending the first glass plate 11 and the second glass plate 12.

[0084] [Interlayer] Thermoplastic resins are often used as the interlayer 13. Examples include thermoplastic resins that have been conventionally used in this type of application, such as plasticized polyvinyl acetal resins, plasticized polyvinyl chloride resins, saturated polyester resins, plasticized saturated polyester resins, polyurethane resins, plasticized polyurethane resins, ethylene-vinyl acetate copolymer resins, ethylene-ethyl acrylate copolymer resins, cycloolefin polymer resins, and ionomer resins. Resin compositions containing modified block copolymer hydrides, as described in Japanese Patent No. 6065221, can also be suitably used.

[0085] Among these, plasticized polyvinyl acetal resins are preferred because they offer an excellent balance of various properties such as transparency, weather resistance, strength, adhesiveness, puncture resistance, impact energy absorption, moisture resistance, heat insulation, and sound insulation. These thermoplastic resins may be used individually or in combination of two or more types. In the context of the above-mentioned plasticized polyvinyl acetal resins, "plasticization" means that the resin has been plasticized by the addition of a plasticizer. The same applies to other plasticized resins.

[0086] However, when encapsulating a specific substance in the interlayer 13, the substance may deteriorate due to a specific plasticizer depending on the type of substance encapsulated. In such cases, it is preferable to use a resin that substantially does not contain that plasticizer. Examples of resins that do not contain plasticizers include ethylene-vinyl acetate copolymer (EVA) resins.

[0087] Examples of the above-mentioned polyvinyl acetal resins include polyvinyl formal resin obtained by reacting polyvinyl alcohol (PVA) with formaldehyde, polyvinyl acetal resin in the narrow sense obtained by reacting PVA with acetaldehyde, and polyvinyl butyral (PVB) resin obtained by reacting PVA with n-butyraldehyde. In particular, PVB is preferred because it has an excellent balance of various properties such as transparency, weather resistance, strength, adhesiveness, puncture resistance, impact energy absorption, moisture resistance, heat insulation, and sound insulation. These polyvinyl acetal resins may be used individually or in combination of two or more types.

[0088] However, the material forming the interlayer 13 is not limited to thermoplastic resins. The interlayer 13 may also contain functional particles such as infrared absorbers, ultraviolet absorbers, and light-emitting agents. The interlayer 13 may also have a colored area called a shade band. The coloring pigment used to form the colored area can be one that can be used for plastics, and the amount added should be adjusted so that the visible light transmittance of the colored area is 40% or less. Examples include organic coloring pigments such as azo, phthalocyanine, quinacridone, perylene, perinone, dioxazine, anthraquinone, and isoindolino, as well as inorganic coloring pigments such as oxides, hydroxides, sulfides, chromic acid, sulfates, carbonates, silicates, phosphates, arsenates, ferrocyanides, carbon, and metal powders. These coloring pigments may be used individually or in combination of two or more types.

[0089] The interlayer 13 may have multiple layers. For example, the interlayer 13 may have three or more layers. For instance, if the interlayer is formed from three or more layers, and the shear modulus of one of the layers (excluding the two side layers) is made smaller than the shear modulus of the two side layers by adjusting the plasticizer, the sound insulation of the laminated glass 10 can be improved. In this case, the shear moduli of the two side layers may be the same or different.

[0090] The thickness of the interlayer 13 is preferably 0.5 mm or more at its thinnest point. If the interlayer 13 has multiple layers, the thickness of the interlayer 13 refers to the sum of the thicknesses of each layer. A thickness of 0.5 mm or more at the thinnest point of the interlayer 13 provides sufficient impact resistance for laminated glass. Furthermore, the thickness of the interlayer 13 is preferably 3 mm or less at its thickest point. A maximum thickness of 3 mm or less for the interlayer 13 prevents the mass of the laminated glass from becoming excessively large. A maximum thickness of 2.8 mm or less for the interlayer 13 is more preferable, and even more preferable, 2.6 mm or less.

[0091] Furthermore, if the interlayer 13 has multiple layers, it is desirable that each layer included in the interlayer 13 be formed from the same material, but it may also be formed from different materials. However, from the viewpoint of adhesion to the first glass plate 11 and the second glass plate 12, or as a functional material to be embedded in the laminated glass 10, it is desirable that 50% or more of the thickness of the interlayer 13 be formed from the above-mentioned material.

[0092] To produce the interlayer 13, for example, the above-mentioned resin material to be the interlayer is appropriately selected and extruded using an extruder in a heated and molten state. The extrusion conditions, such as the extrusion speed of the extruder, are set so that the interlayer 13 is produced uniformly. After that, the extruded resin film is stretched as needed to give the top and bottom edges curvature according to the design of the laminated glass, thereby completing the interlayer 13.

[0093] [Laminated glass] The total thickness of the laminated glass 10 is preferably 2.8 mm or more and 10 mm or less. If the total thickness of the laminated glass 10 is 2.8 mm or more, sufficient rigidity can be ensured. If the total thickness of the laminated glass 10 is 10 mm or less, sufficient light transmittance can be obtained and haze can be reduced.

[0094] In at least one side of the laminated glass 10, the misalignment between the first glass plate 11 and the second glass plate 12 is preferably 1.5 mm or less, and more preferably 1 mm or less. Here, the misalignment between the first glass plate 11 and the second glass plate 12 refers to the amount of misalignment between the outer peripheral surface of the first glass plate 11 and the outer peripheral surface of the second glass plate 12 in a plan view.

[0095] In the laminated glass 10, it is preferable that the misalignment between the first glass plate 11 and the second glass plate 12 on at least one side is 1.5 mm or less, in order to avoid impairing the appearance. It is even more preferable that the misalignment between the first glass plate 11 and the second glass plate 12 on at least one side is 1.0 mm or less, in order to avoid impairing the appearance. However, at the lower edge of the laminated glass 10, the misalignment between the first glass plate 11 and the second glass plate 12 may exceed 1.0 mm. In order to firmly attach the holder 160, etc., which will be described later, at least one of the first glass plate 11 and the second glass plate 12 may have a through hole.

[0096] To manufacture laminated glass 10, an interlayer film 13 is sandwiched between a first glass plate 11 and a second glass plate 12 to form a laminate. Then, for example, this laminate is placed in a rubber bag, rubber chamber, or resin bag, and bonded in a vacuum with a gauge pressure controlled in the range of -100kPa to -65kPa and a temperature controlled in the range of approximately 70°C to 110°C. The heating conditions, temperature conditions, and lamination method may be selected as appropriate.

[0097] After bonding, a more durable laminated glass 10 can be obtained by performing a heat and pressure bonding process under controlled conditions, for example, a temperature of 100°C to 150°C and an absolute pressure of 0.6 MPa to 1.3 MPa. However, in some cases, this heat and pressure process may be omitted to simplify the process and to consider the properties of the material enclosed in the laminated glass 10.

[0098] A method called "cold bending" may be used, in which one or both of the first glass plate 11 and the second glass plate 12 are joined in a state of elastic deformation relative to each other. Cold bending can be achieved by using a laminate consisting of the first glass plate 11, the interlayer 13, and the second glass plate 12, which are fixed by temporary fastening means such as tape, and conventionally known pre-pressing devices such as nip rollers, rubber bags, or rubber chambers, and an autoclave.

[0099] Between the first glass plate 11 and the second glass plate 12, in addition to the interlayer 13, there may be films or devices having functions such as heating, infrared reflection, light emission, power generation, dimming, touch panel, visible light reflection, scattering, decoration, and absorption, to the extent that they do not impair the effects of the present invention. Furthermore, the surface of the laminated glass 10 may have a film having functions such as anti-fogging, water repellency, heat shielding, and low reflectivity. In addition, the first main surface 111 of the first glass plate 11 and the fourth main surface 124 of the second glass plate 12 may have a film having functions such as heat shielding and heat generation.

[0100] [Vehicle window structure] Figure 9 is a schematic diagram illustrating a vehicle window structure. As shown in Figure 9, when the laminated glass 10 is a side door glass that can slide vertically, a holder 160 and a lifting device 170 are arranged inside the door panel. A glass run 130 is also arranged mainly above the lifting device 170, which clamps the upper edge and both sides of the laminated glass 10. Although detailed illustration is omitted in Figure 9, at the upper edge of the laminated glass 10, similar to the example shown in Figure 4, the glass run 130 contacts only the transparent portion 128 of the second shielding layer 15 of the fourth main surface 124 of the second glass plate 12. The distance from the glass run 130 to the second shielding layer 15, that is, the width of the transparent portion 128 visible when viewing the laminated glass 10 from the inside of the vehicle, may be 0 mm or more, but preferably greater than 0 mm, and may be 1 mm or more, 2 mm or more, or 3 mm or more. If the distance from the glass run 130 to the second shielding layer 15 is greater than 0 mm, scratch resistance is improved even when considering manufacturing tolerances and vehicle vibrations during use. The upper limit of this width is not particularly limited, but for example, it may be 10 mm or less, 8 mm or less, or 6 mm or less. If the width is 10 mm or less, deterioration of appearance due to the second shielding layer 15 can be suppressed.

[0101] Figure 9 shows the laminated glass 10, which is slidable in the vertical direction, in a completely closed state (located at its uppermost position). In the state shown in Figure 9, the top and both sides of the laminated glass 10 are sandwiched between the glass runs 130. Even when the laminated glass 10 is completely closed, the part of the laminated glass 10 below the beltline BL is located inside the door panel and is therefore not exposed to the outside.

[0102] The holder 160 is a support member that slidably supports the laminated glass 10. The holder 160 is formed of, for example, urethane and supports at least one of the pair of glass plates. Specifically, the holder 160 supports, for example, the lower end of the laminated glass 10 and further extends from the lower end to the lower edges of the first and / or second glass plates to support the lower edges of the first and / or second glass plates. Alternatively, the holder 160 may not support the lower end of the laminated glass 10, but may support the laminated glass 10 by clamping the pair of glass plates from both sides. Note that the material of the holder 160 is not limited to urethane.

[0103] The lifting device 170 is a device that moves the laminated glass 10 up and down along the glass run 130. The lifting device 170 is, for example, an arm-type regulator and consists of two arms 171 and 172, a lifting rail 173, and a fixed rail 174. The holder 160 is attached to the lifting rail 173 of the lifting device 170.

[0104] The two arms 171 and 172 are connected to each other so as to be rotatable around a pivot point 175. The lifting rail 173 extends horizontally and is a rail that can move up and down relative to the vehicle door. The upper ends of both arms 171 and 172 are both attached to the lifting rail 173 so as to be slidable horizontally. The fixed rail 174 extends horizontally and is a rail fixed to the vehicle door.

[0105] The lower end of arm 171 is mounted to a fixed rail 174 so as to be slidable horizontally, and the lower end of arm 172 is connected to a regulator via a gear 176. In this configuration, when the gear 176 is driven via the regulator, arms 171 and 172 rotate around a pivot point 175, thereby raising and lowering the lifting rail 173. Note that the lifting device 170 is not limited to this configuration and may also be a lifting device using wires, etc.

[0106] <Examples and Comparative Examples> Examples and comparative examples are described below, but the present invention is not limited to these examples. Examples 1 and 4 are examples, and Examples 2 and 3 are comparative examples.

[0107] [Example 1] For the first glass panel, which will serve as the outer panel (exterior glass panel) when laminated, and the second glass panel, which will serve as the inner panel (interior glass panel) when laminated, we prepared privacy glass with a thickness of 2 mm. In addition, we prepared two sheets of PVB film (Solucia Japan, RK11) with a thickness of 0.38 mm as an interlayer, and a polymer-dispersed liquid crystal (PDLC) film with a thickness of 0.4 mm as a light-adjusting film.

[0108] The first glass plate used had a black ceramic printed as the first shielding layer on the second main surface, which would be on the interior side when laminated. The second glass plate used had a black ceramic printed as the second shielding layer on the fourth main surface, which would be on the interior side when laminated. The dimensional relationship between the first and second shielding layers is as shown in Example 1 of Table 1 below.

[0109] Next, a laminate was fabricated by arranging the first glass plate, the first interlayer, the dimming film, the second interlayer, and the second glass plate in this order. This laminate was then bonded in a vacuum with a gauge pressure controlled to a range of -100kPa to -65kPa, and a temperature controlled to a range of approximately 70°C to 110°C. Furthermore, a compression bonding process was performed by heating and pressurizing under conditions where the temperature was controlled to a range of 100°C to 150°C and the absolute pressure to a range of 0.6MPa to 1.3MPa, thereby producing laminated glass.

[0110] [Example 2] Laminated glass was manufactured in the same manner as in Example 1, except that the dimensional relationship between the first and second shielding layers was as shown in Example 2 of Table 1 described below.

[0111] [Example 3] Laminated glass was manufactured in the same manner as in Example 1, except that the dimensional relationship between the first and second shielding layers was as shown in Example 3 of Table 1 described below.

[0112] [Example 4] Laminated glass was manufactured in the same manner as in Example 1, except that the dimensional relationship between the first shielding layer and the second shielding layer was as shown in Example 4 of Table 1 described below.

[0113] [evaluation] Laminated glass panels prepared in Examples 1 through 4 were fitted into vehicle door panels, and a lifting and lowering test was conducted by repeatedly raising and lowering them. After every 100 lifting and lowering cycles, dust liquid was sprayed onto each laminated glass panel, and the process was repeated 5000 times. After 5000 cycles, the appearance was visually inspected, and if scratches were found on the fourth main surface of the second glass panel, it was marked as "unsuitable"; otherwise, it was marked as "suitable". The dust liquid used was water in which test powders of types 2 and 8 specified in JIS Z 8901:2006 were dissolved.

[0114] Furthermore, the laminated glass prepared in Examples 1 to 4 was placed in a constant temperature chamber at 90°C for a heat resistance test. After 1000 hours, each laminated glass was removed from the constant temperature chamber, and it was evaluated whether the deteriorated portion of the periphery of the light-adjusting film was visible from the inside of the vehicle. Specifically, if the deteriorated portion of the light-adjusting film was visible protruding from the second shielding layer when viewed from the inside of the vehicle, it was marked as "unsuitable"; if it was not visible, it was marked as "suitable". Note that the laminated glass used in the lifting test and the laminated glass used in the heat resistance test were different.

[0115] [Table 1] As shown in Table 1, the results of the lifting test showed that Example 2 was "unsuitable," while Examples 1, 3, and 4 were "suitable." Specifically, in Example 2, the width W of the transparent section... B However, because it was only 2mm wide, the second shielding layer was in contact with the glass run and got scratched. On the other hand, in Examples 1, 3, and 4, the width W of the transparent portion was B However, because the thickness was 5mm or more, the second shielding layer did not come into contact with the glass run, so no scratches occurred.

[0116] Furthermore, the results of the heat resistance test showed that Example 3 was "unsuitable," while Examples 1, 2, and 4 were "suitable." In other words, in Example 2, W A - Because X is narrow at 4mm, the second shielding layer could not completely conceal the deteriorated portion of the peripheral edge of the dimming film, and the deteriorated portion was visible from inside the vehicle. On the other hand, in examples 1, 2, and 4, W A -X was 17mm or more, and the second shielding layer was able to sufficiently conceal the deteriorated portion of the peripheral edge of the dimming film, so the deteriorated portion was not visible from inside the vehicle.

[0117] Although preferred embodiments have been described in detail above, the invention is not limited to the embodiments described above, and various modifications and substitutions can be made to the embodiments described above without departing from the scope of the claims. Furthermore, the entire contents of the specifications, claims, drawings, and abstracts of Japanese Patent Application No. 2021-87419, filed on May 25, 2021, and Japanese Patent Application No. 2021-117142, filed on July 15, 2021, are incorporated herein by reference as disclosure of the specification of the present invention. [Explanation of Symbols]

[0118] 10, 20 Laminated glass 11. First glass plate 12. Second glass plate 13 Interlayer 14 1st shielding layer 15 Second shielding layer 16 Dimming film 111 First Main Surface 112 Second Main Surface 123 Third Main Surface 124 Fourth Main Surface 128 Transparent part 130 Shielding part 134 Semi-shielding section 141 dot area 142 Stripe Area 160 holder 161,165 Transparent base material 162,164 conductive layer 163 Dimming layer 166 Sealing material 170 Lifting device 171,172 arms 173 Lifting rail 174 Fixed Rail 175 Fulcrum 176 gears

Claims

1. A first glass plate and a second glass plate facing each other, an interlayer provided between the first glass plate and the second glass plate, and a dimmable film provided inside the interlayer, the dimmable film having a switchable visible light transmittance, Furthermore, it has a lower edge portion to which wiring to the dimming film is connected, an upper edge portion opposite to the lower edge portion, and a side edge portion connecting the upper edge portion and the lower edge portion. The first glass plate has a first main surface located on the opposite side of the interlayer and a second main surface facing the interlayer. The second glass plate has a third main surface facing the interlayer and a fourth main surface located on the opposite side of the interlayer. A first shielding layer is provided between the first main surface and the light-adjusting film, and a second shielding layer is provided on the fourth main surface. Having either structure A or structure B, In a plan view of the second glass plate, the periphery of the light-adjusting film at the upper edge overlaps with the second shielding layer, and is made of laminated glass for vehicles. A support member that slidably supports the aforementioned laminated glass for vehicles, A vehicle window structure having a glass run that clamps the side portion and the upper portion. Structure A: At least one of the side edge and the top edge is provided with a transparent portion at the peripheral edge of the fourth main surface. At least a portion of the shielded or semi-shielded portion formed by the second shielding layer is located inward in the planar direction from the transparent portion. Structure B: The second shielding layer has a semi-shielding portion extending inward in the planar direction from the periphery of the fourth main surface.

2. The vehicle window structure according to claim 1, wherein the width of the second shielding layer is 3 mm or more and 35 mm or less.

3. The vehicle window structure according to claim 1 or 2, wherein, in a plan view of the second glass plate, the distance between the periphery of the second shielding layer and the periphery of the light-adjusting film at the upper edge is 10 mm or less.

4. The width of the second shielding layer is W Ａ [mm], when the distance between the periphery of the second shielding layer and the periphery of the light-adjusting film is X [mm], W Ａ A vehicle window structure according to claim 1 or 2, satisfying -X ≥ 5.

5. W Ａ A vehicle window structure according to claim 4, satisfying -X ≤ 35.

6. The vehicle window structure according to claim 1 or 2, wherein, in a plan view of the second glass plate, the distance between the inner edge of the second shielding layer and the inner edge of the first shielding layer 14 is 0 mm or more and 10 mm or less.

7. The upper portion has the first shielding layer, the second shielding layer, and the permeable portion. The vehicle window structure according to claim 1 or 2, wherein the width of the transparent portion in the upper portion is 5 mm or more and 25 mm or less.

8. The side portion has the first shielding layer, The vehicle window structure according to claim 7, wherein the second shielding layer and the transparent portion are provided only on the upper edge.

9. The side portion has the first shielding layer, the second shielding layer, and the permeable portion. The vehicle window structure according to claim 1 or 2, wherein the width of the transparent portion in the side portion is 3 mm or less.

10. The side portion has the first shielding layer, the second shielding layer, and the permeable portion. The vehicle window structure according to claim 1 or 2, wherein the width of the transparent portion in the side portion is 5 mm or more and 25 mm or less.

11. The side portion and the top portion have the first shielding layer, the second shielding layer, and the permeable portion, In the aforementioned side portion, the width of the transparent portion is 5 mm or more and 25 mm or less. The vehicle window structure according to claim 1 or 2, wherein the width of the transparent portion in the upper portion is 3 mm or less.

12. The vehicle window structure according to claim 1 or 2, wherein the semi-shielded portion formed by the first shielding layer or the second shielding layer has a dot region or a stripe region.

13. The semi-shielding portion formed by the first shielding layer has the dot region or the stripe region, In a plan view of the second glass plate, the periphery of the second shielding layer overlaps with the dot region or the stripe region of the first shielding layer. Or, The semi-shielded portion formed by the second shielding layer has the dot region or the stripe region, The vehicle window structure according to claim 12, wherein, in a plan view of the first glass plate, the periphery of the first shielding layer overlaps with the dot region or the stripe region of the second shielding layer.

14. The vehicle window structure according to claim 1 or 2, wherein the light-adjusting film comprises two transparent substrates with conductive layers facing each other, and between the two transparent substrates is a light-adjusting layer selected from a suspended particle device, a polymer dispersed liquid crystal, a polymer network liquid crystal, a guest-host liquid crystal, a photochromic, an electrochromic, or an electrokinetic layer.

15. The vehicle window structure according to claim 1 or 2, wherein the light-adjusting film has its outer peripheral side sealed with resin or adhesive tape.

16. The vehicle window structure according to claim 1 or 2, wherein the interlayer comprises one or more resins selected from plasticized polyvinyl acetal resin, plasticized polyvinyl chloride resin, saturated polyester resin, plasticized saturated polyester resin, polyurethane resin, plasticized polyurethane resin, ethylene-vinyl acetate copolymer resin, ethylene-ethyl acrylate copolymer resin, and cycloolefin polymer resin.

17. The vehicle window structure according to claim 1 or 2, wherein the glass run is in contact with only the transparent portion of the transparent portion and the second shielding layer at least one of the side portion and the upper portion.

18. The vehicle window structure according to claim 17, wherein the distance between the glass run and the second shielding layer is 0 mm or more and 10 mm or less.

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