Laminated glass for vehicles and window structures for vehicles

Abstract

To improve durability of sliding while suppressing deterioration of appearance seen from inside and outside of a vehicle with a laminated glass having a light control film. The laminated glass for a vehicle is a laminated glass for a vehicle having a first glass sheet and a second glass sheet facing each other, an interlayer film provided between the first glass sheet and the second glass sheet, and a light control film provided inside the interlayer film and capable of switching visible light transmittance, wherein it has a lower edge portion to which a wiring connected to the light control 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, the first glass sheet has a first main surface on the opposite side of the interlayer film and a second main surface facing the interlayer film, the second glass sheet has a third main surface facing the interlayer film and a fourth main surface on the opposite side of the interlayer film, it has a first shielding layer provided between the first main surface and the light control film and a second shielding layer on the fourth main surface, at least one of the side edge portion and the upper edge portion is provided with a transmission portion at a peripheral edge portion of the fourth main surface, at least a part of the second shielding layer is located more inward in a surface direction than the transmission portion, and a peripheral edge of the light control film in the upper edge portion overlaps the second shielding layer in a plan view of the second glass sheet.

Description

Technical Field

[0001] This invention relates to laminated glass for vehicles and window structures for vehicles. Background Technology

[0002] Laminated glass with a dimming film capable of switching visible light transmittance is known for use as window glass in vehicles such as motor vehicles or railways. The dimming film is, for example, a film of liquid crystal or electroluminescent element, and is, for example, sealed in an interlayer film sandwiched between two glass plates (see, for example, Patent Document 1).

[0003] In such laminated glass, the periphery of the dimming layer located inside the dimming film may deteriorate due to moisture or impact. Therefore, the periphery of the dimming film is positioned closer to the inside in the planar direction than the periphery of the glass panel. However, with this configuration, since the periphery of the dimming film can be seen from both inside and outside the vehicle, the appearance deteriorates from both inside and outside the vehicle.

[0004] Therefore, in order to make the periphery of the dimming film invisible from both inside and outside the vehicle, a shielding layer is sometimes provided, for example, on the inner side of the glass panel located on the outside of the vehicle or on the inner side of the glass panel located on the inside of the vehicle.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: International Publication No. 2007 / 142319 Summary of the Invention

[0008] The technical problem that the invention aims to solve

[0009] However, when laminated glass like the aforementioned is used in sliding glass such as side door windows of vehicles, the durability of sliding will deteriorate if a shielding layer is provided on the inner side of the glass panel located on the inside of the vehicle. Specifically, if the laminated glass slides repeatedly, the shielding layer provided on the inner side of the glass panel located on the inside of the vehicle will wear down due to contact with the glass track.

[0010] In view of the above, the present invention aims to improve the durability against sliding while suppressing the deterioration of the appearance as seen from inside and outside the vehicle for laminated glass for vehicles with a dimming film.

[0011] Technical solutions adopted to solve technical problems

[0012] One embodiment of the laminated glass for vehicles disclosed herein comprises a first glass plate and a second glass plate facing each other, an interlayer film disposed between the first glass plate and the second glass plate, and a dimming film disposed inside the interlayer film capable of switching visible light transmittance. The laminated glass has a lower side portion connected by wiring to the dimming film, an upper side portion facing the lower side portion, and a side portion connecting the upper side portion and the lower side portion. The first glass plate has a first main surface located opposite to the interlayer film and a second main surface facing the interlayer film. The second glass plate has a third main surface facing the intermediate film and a fourth main surface located on the opposite side of the intermediate film. It has a first shielding layer disposed between the first main surface and the dimming film and a second shielding layer disposed on the fourth main surface. At least one of the side portion and the upper portion has a transmissive portion at the periphery of the fourth main surface. At least a portion of the second shielding layer is located further inward than the transmissive portion in the surface direction. From a top view of the second glass plate, the periphery of the dimming film in the upper portion overlaps with the second shielding layer.

[0013] Another embodiment of the laminated glass for vehicles disclosed herein is a laminated glass for vehicles having a first glass plate and a second glass plate facing each other, an interlayer film disposed between the first glass plate and the second glass plate, and a dimming film disposed inside the interlayer film capable of switching visible light transmittance. The laminated glass further has a lower side portion connected by wiring to the dimming film, an upper side portion facing the lower side portion, and a side portion connecting the upper side portion and the lower side portion. The first glass plate has a first main surface located opposite to the interlayer film and a second main surface facing the interlayer film. The second glass plate has a third main surface facing the interlayer film and a fourth main surface located opposite to the interlayer film. It has 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 a structure A or a structure B, wherein, from a top view of the second glass plate, the periphery of the dimming film in the upper side portion overlaps with the second shielding layer.

[0014] Structure A: At least one of the side portion and the top portion has a transmissive portion at the periphery of the fourth main surface.

[0015] At least a portion of the shielding portion or semi-shielding portion formed by the second shielding layer is located further inward in the planar direction than the transmissive portion.

[0016] Structure B: The second shielding layer has a semi-shielded portion extending inward from the periphery of the fourth main surface in the surface direction.

[0017] Invention Effects

[0018] According to one embodiment of this disclosure, for laminated glass for vehicles with a dimming film, the durability of sliding can be improved while suppressing the deterioration of the appearance seen from inside and outside the vehicle. Attached Figure Description

[0019] Figure 1A and 1B The figure shown illustrates the laminated glass of the first embodiment.

[0020] Figure 2 The image shown is a magnified view of the upper part of the laminated glass (Figure 1).

[0021] Figure 3 The image shown is a magnified view of the upper part of the laminated glass (Figure 2).

[0022] Figure 4 The diagram shown is an explanatory diagram of the glass slide.

[0023] Figure 5 The image shown is a partial enlarged view (of example 1) of another example near the upper edge of laminated glass.

[0024] Figure 6 The image shown is a partial enlarged view (of example 2) of another example near the upper edge of laminated glass.

[0025] Figure 7 The image shown is a partial enlarged view (3) of another example near the upper edge of laminated glass.

[0026] Figure 8A and 8B The figure shown is a modified example of the laminated glass according to the first embodiment.

[0027] Figure 9 The diagram shown is a schematic representation of a window structure for a vehicle. Detailed Implementation

[0028] Embodiments of the present invention will now be described with reference to the accompanying drawings. In the drawings, the same components are labeled with the same reference numerals, and sometimes repeated descriptions are omitted. Furthermore, in order to facilitate understanding of the present invention, some dimensions or shapes are sometimes exaggerated in the drawings.

[0029] In addition, while "vehicle" typically refers to motor vehicles, it is believed to refer to any moving object that can carry laminated glass, including trams, ships, and airplanes.

[0030] In addition, the top-down view refers to observing an object from the direction of the normal line passing through the center of gravity of the object's main surface; the shape seen at this time is called the planar shape.

[0031] Furthermore, the terms "upper" and "lower" refer to the upper and lower parts of the laminated glass when it is installed on the vehicle. Additionally, the terms "upper side" and "lower side" refer to the areas of the laminated glass installed on the vehicle that include the upper side with a specified width, and the areas that include the lower side with a specified width, respectively. The term "side side" refers to the area of ​​the laminated glass installed on the vehicle that includes at least one of the right and left sides with a specified width.

[0032] Furthermore, the outer edge of a component viewed from above is called the "periphery," and the wide area within the component that connects to the "periphery" is called the "periphery portion." The periphery portion is a term encompassing the top, bottom, and side portions. When the laminated glass is reduced in size with its center of gravity as the center, the periphery portion can refer to the area between the original and reduced "periphery." The reduction rate can be, for example, 99% to 70%, or it could be 95%, 90%, 80%, or 75%.

[0033] Laminated glass

[0034] Figure 1A and 1B The figure shown illustrates the laminated glass 10 of the first embodiment. Figure 1A The diagram shown is a schematic representation of the shape of the laminated glass as seen from the normal direction of the second glass plate. Figure 1B The following is along Figure 1A A partially enlarged sectional view of line AA.

[0035] like Figure 1B As shown, the laminated glass 10 is a vehicle-use laminated glass having a first glass plate 11, a second glass plate 12, an interlayer film 13, a first shielding layer 14, a second shielding layer 15, and a dimming film 16. The laminated glass 10 has a lower edge portion located on the lower side when the laminated glass 10 is installed on a vehicle, an upper edge portion located on the upper side when the laminated glass 10 is installed on a vehicle and facing the lower edge portion, and a pair of side portions connecting the lower edge portion and the upper edge portion. Figure 1B The image shown is a cross-sectional view near the upper edge of the laminated glass 10.

[0036] The first glass panel 11 and the second glass panel 12 are bonded together with an interlayer film 13. The first glass panel 11 is disposed on the first side of the vehicle exterior when the laminated glass 10 is installed on the vehicle, and the second glass panel 12 is disposed on the second side of the vehicle interior when the laminated glass 10 is installed on the vehicle.

[0037] Figure 1A and 1B In this illustration, for ease of explanation, the actual curved shape of the laminated glass 10 is omitted and its external shape is simplified. However, the laminated glass 10 can be more than just... Figure 1AThe planar shape (non-curved shape) shown can also be a curved shape. The laminated glass 10 can be, for example, a single-curved shape curved in either the vertical or horizontal direction when mounted on a vehicle, or a multi-curved shape curved in both the vertical and horizontal directions. However, single-curved and multi-curved shapes are not limited to shapes curved in the vertical and / or horizontal directions when mounted on a vehicle. A single-curved shape includes shapes curved in only one direction. A multi-curved shape includes shapes curved in any two or more different directions.

[0038] When the laminated glass 10 is curved, it is preferably curved to bulge outwards from the vehicle. Specifically, the first glass panel 11 is preferably curved to bulge towards the opposite side of the interlayer film 13, and the second glass panel 12 is preferably curved to bulge towards the interlayer film 13. Furthermore, Figure 1A From a top-down view, the laminated glass 10 is roughly rectangular, but it is not limited to a roughly rectangular shape and can be any shape. Here, "roughly" means that geometrical strictness, such as straightness, the number and size of angles, is not required. The laminated glass 10 can also be roughly trapezoidal, roughly triangular, etc. Furthermore, when the laminated glass 10 is roughly triangular, it has one side and one side portion.

[0039] Laminated glass 10 can be used as window glass or interior partitions in vehicles. As a window glass for motor vehicles, laminated glass 10 can be used for windshields, rear windows, quarter windows, sunroofs, and additional windows. Furthermore, in vehicle window glass, laminated glass 10 is suitable for use as a window glass that can slide vertically. Examples of such windows include front side windows and rear side windows of motor vehicles.

[0040] Figure 1A The body waistline BL is the boundary line between the laminated glass 10 and the vehicle door panel when the laminated glass 10 is installed on the vehicle. Figure 1A The schematic diagram illustrates the positional relationship between the laminated glass 10, which can slide in the vertical direction, and the body waistline BL in the fully closed state (the state at the top).

[0041] The first glass panel 11 has a first main surface 111 opposite to the interlayer film 13 and a second main surface 112 on the side of the interlayer film 13. The second glass panel 12 has a third main surface 123 on the side of the interlayer film 13 and a fourth main surface 124 opposite to the interlayer film 13. When the laminated glass 10 is installed on a vehicle, the first main surface 111 becomes the surface closest to the outer side of the vehicle, and the fourth main surface 124 becomes the surface closest to the inner side of the vehicle.

[0042] When the laminated glass 10 is curved, the minimum radius of curvature of the laminated glass 10 is preferably between 500 mm and 100,000 mm. The radii of curvature of the first glass plate 11 and the second glass plate 12 may be the same or different. When 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.

[0043] The first glass plate 11 and the second glass plate 12 are a pair of glass plates facing each other, with the intermediate film 13 and the dimming film 16 located between the pair of glass plates. The first glass plate 11 and the second glass plate 12 are fixed in a state that clamps the intermediate film 13 and the dimming film 16. The intermediate film 13 is a film that joins the first glass plate 11 and the second glass plate 12.

[0044] At least at the upper edge of the laminated glass 10, the outer peripheral side of the interlayer film 13 is exposed. Therefore, the outer peripheral side of the interlayer film 13 is preferably edge-treated. That is, the outer peripheral side of the interlayer film 13 is preferably treated so that it does not protrude significantly from the outer peripheral sides of the first glass plate 11 and the second glass plate 12. It is suitable from the perspective of not impairing the appearance if the protrusion of the outer peripheral side of the interlayer film 13 from the outer peripheral sides of the first glass plate 11 and the second glass plate 12 is less than 1 mm. More preferably, the protrusion of the outer peripheral side of the interlayer film 13 from the outer peripheral sides of the first glass plate 11 and the second glass plate 12 is less than 0.5 mm, and even more preferably less than 0.15 mm.

[0045] Furthermore, the outer peripheral side of the interlayer film 13 can be embedded in the inner side closer to the surface than the outer peripheral sides of the first glass plate 11 and the second glass plate 12. It is suitable from the perspective of not compromising the strength of the laminated glass if the embedment amount of the outer peripheral side of the interlayer film 13 relative to the outer peripheral sides of the first glass plate 11 and the second glass plate 12 is within 3 mm. More preferably, the embedment amount of the outer peripheral side of the interlayer film 13 relative to the outer peripheral sides of the first glass plate 11 and the second glass plate 12 is within 2 mm, and even more preferably within 1 mm. The first glass plate 11, the second glass plate 12, and the interlayer film 13 will be described in detail later.

[0046] The first shielding layer 14 is an opaque layer, for example, disposed at least at 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 disposed only at the upper edge of the laminated glass 10, or it may be disposed on one or both of the side edges in addition to the upper edge of the laminated glass 10. When the first shielding layer 14 is disposed on both side edges of the laminated glass 10, the first shielding layer 14 may be disposed only on the side closer to the upper edge than the body waistline BL. However, the first shielding layer 14 may also extend on both side edges of the laminated glass 10 to the side closer to the lower edge than the body waistline BL.

[0047] The first shielding layer 14 can be as follows: Figure 1A and 1B The shielding portion 130 can be formed as shown, or a partial shielding portion can be formed in part or all of it. The second shielding layer 15, described later, can also be formed in the same way. Figure 1A The shielding portion 130 can be formed as shown in Figure B, or a partial shielding portion can be formed in part or all of it. That is, the shielding portion 130 and the partial shielding portion are formed by at least one of the first shielding layer 14 and the second shielding layer 15, respectively. The shielding portion 130 provides shielding effect over all portions of the defined area. The partial shielding portion provides shielding effect over a portion of the defined area. That is, the shielding portion 130 does not include the point area or line area described later, while the partial shielding portion includes the point area or line area described later.

[0048] Figure 1A In the example, the first shielding layer 14 is provided on the second main surface 112 at the upper edge of the laminated glass 10. Moreover, from the top view of the first glass panel 11, the two ends of the first shielding layer 14 provided at the upper edge extend toward the two sides of the laminated glass 10 and are only provided on the side closer to the upper edge than the body waistline BL.

[0049] The second shielding layer 15 is an opaque layer, for example, it is provided on the fourth main surface 124 at least at the upper edge of the laminated glass 10. At the upper edge of the laminated glass 10, in a top view of the second glass panel 12, 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 to 10 mm. If the distance L is less than 10 mm, the shielding layer is not easily noticeable, and good visibility is easily ensured, so it is preferred. The distance L can also be less than 8 mm, and can also be less than 6 mm. In addition, if the distance L is greater than 0 mm, the boundary between the inner edge of the first shielding layer 14 and the inner edge of the second shielding layer 15 is not easily seen from inside and outside the vehicle. If the distance L is greater than 0 mm, it is preferred because it can reduce the effect of deformation (seam deformation) 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.

[0050] Distance L is not limited to, for example Figure 1B As illustrated, if the inner edge of the first shielding layer 14 is located closer to the lower side (in-plane) than the inner edge of the second shielding layer 15, the same applies if the inner edge of the second shielding layer 15 is located closer to the lower side (in-plane) than the inner edge of the first shielding layer 14. In this case, the distance L can be measured from the top view of the first glass plate 11, rather than from the top view of the second glass plate 12.

[0051] At the upper edge of the laminated glass 10, the width W of the second shielding layer 15 is... APreferably, the thickness is between 3mm and 35mm. If the width W of the second shielding layer 15... A A thickness of 3mm or more can adequately shield the periphery of the dimming film 16. If the width W of the second shielding layer 15... A When the thickness is below 35mm, the appearance degradation caused by 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 More preferably, the width is 5mm or more; further preferably, it is 8mm or more; even more preferably, it is 10mm or more; and particularly preferably, it is 15mm or more. Furthermore, at the upper edge of the laminated glass 10, the width W of the second shielding layer 15... A More preferably, it should be 30 mm or less. Within this range, the periphery of the dimming film 16 can be more reliably shielded. Furthermore, the width W of the second shielding layer 15... A It may not be constant but rather vary locally. The width W of the second shielding layer 15... A In cases of localized changes, gradual changes are preferred.

[0052] 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 sides in addition to the upper edge of the laminated glass 10. When the second shielding layer 15 is provided on both sides of the laminated glass 10, the second shielding layer 15 may be provided only on the side closer to the upper edge than the body waistline BL. However, the second shielding layer 15 may also extend on both sides of the laminated glass 10 to the side closer to the lower edge than the body waistline BL.

[0053] Figure 1A In the example, the second shielding layer 15 is located on the fourth main surface 124 at the upper edge of the laminated glass 10, and from the top view of the second glass panel 12, the two ends of the second shielding layer 15 located at the upper edge extend to the two sides of the laminated glass 10 and are only located closer to the upper edge than the body waistline BL.

[0054] In the second glass plate 12, a transmissive portion 128 is provided at the periphery of the fourth main surface 124. The transmissive portion 128 is the portion of the fourth main surface 124 exposed at the periphery of the fourth main surface 124. However, the portion of the fourth main surface 124 exposed in the point area or line area described later (i.e., the gap between points or lines) is not included within the transmissive portion 128. The second shielding layer 15 is located at the upper edge of the laminated glass 10, closer to the lower side than the transmissive portion 128. The periphery of the second shielding layer 15 is in contact with the transmissive portion 128.

[0055] Figure 1AIn the example, the shielding portion 130 is formed by a first shielding layer 14 and a second shielding layer 15. More specifically, in the shielding portion 130, the portion of the first glass plate 11 that overlaps with the transmission portion 128 from a top-view perspective is formed only by the first shielding layer 14, while the portion that does not overlap with the transmission portion 128 (closer to the lower side than the transmission portion 128) is formed by the first shielding layer 14 and the second shielding layer 15.

[0056] At the upper edge of the laminated glass 10, the width W of the transmissive portion 128 is... B Preferably, the width is between 5mm and 25mm. If the width W of the transmissive portion 128... B If the thickness is 5mm or more, when the laminated glass 10 is used as a sliding window, it can prevent the second shielding layer 15 located at the upper edge from contacting the glass track. If the width W of the transmission section 128 is... B If the thickness is below 25mm, the appearance degradation caused by the second shielding layer 15 as seen from inside the vehicle can be suppressed. At the upper edge of the laminated glass 10, the width W of the transmissive portion 128... B More preferably, it is less than 20 mm, even more preferably less than 15 mm, and still more preferably less than 10 mm. Within this range, the appearance degradation caused by the second shielding layer 15 as seen from inside the vehicle can be further suppressed. Additionally, the width W of the transmissive portion 128... B It can also be 6mm or more, 7mm or more, or even 8mm or more. Furthermore, the width W of the transmission section 128... B It may not be constant but rather vary locally. The width W of the transmission section 128... B In cases of localized changes, gradual changes are preferred.

[0057] When the second shielding layer 15 is provided on one or both sides of the side portion, the width of the transmissive portion 128 at the side portion where the second shielding layer 15 is provided can be 0 mm or more and 3 mm or less. At the side portion where the second shielding layer 15 is provided, the width of the transmissive portion 128 can also be 2 mm or less, or even 1 mm or less. That is, when the second shielding layer 15 is provided on one or both sides of the side portion, the transmissive portion 128 may not be provided at the side portion where the second shielding layer 15 is provided.

[0058] The side portion of the second shielding layer 15 does not need to be provided with a transmission portion 128 because even if the second shielding layer 15 on the side portion comes into contact with the glass slide and is damaged during lifting, the second shielding layer 15 on the side portion will not be exposed from the glass slide and therefore will not be seen from the inside of the vehicle.

[0059] However, since the second shielding layer 15 and the glass track sometimes produce sliding noise due to sliding, a transmissive portion 128 with a width sufficient to avoid contact with the glass track can also be provided on the side. In this case, the width W of the transmissive portion 128 at the side of the laminated glass 10 is... B Preferably, the width is between 5mm and 25mm. If the width W of the transmissive portion 128... B If the thickness is 5mm or more, when the laminated glass 10 is used as a sliding window, the second shielding layer 15 located on the side can be prevented from contacting the glass track. Therefore, the scratch resistance of the laminated glass 10 is improved. If the width W of the transmissive portion 128... B If the thickness is less than 15mm, the appearance degradation caused by the second shielding layer 15 as seen from inside the vehicle can be suppressed. At the side of the laminated glass 10, the width W of the transmissive portion 128... B More preferably, the thickness is less than 20 mm, further preferably less than 15 mm, and even more preferably less than 10 mm. Within this range, the appearance degradation caused by the second shielding layer 15 as seen from inside the vehicle can be further suppressed. So far, an example has been shown where the second shielding layer 15 is located at least at the upper edge of the laminated glass 10, closer to the lower side (in-plane inner side) than the transmissive portion 128. However, this is not a limitation; the second shielding layer 15 may also be located at only one or both sides of the side edge of the laminated glass 10, closer to the in-plane inner side than the transmissive portion 128. For example, the width W of the transmissive portion 128 at the side edge of the laminated glass 10 could be... B The width W of the transmissive portion 128 at the upper edge is between 5mm and 25mm. B Less than 3mm. In this case, the width W of the transmissive portion 128 at the upper edge... B It can be less than 2mm, or even less than 1mm.

[0060] Figure 1A and 1B In the example, from a top-view perspective of the second glass panel 12, the periphery of the dimming film 16 in the upper part of the laminated glass 10 overlaps with the first shielding layer 14. Furthermore, from a top-view perspective of the second glass panel 12, the periphery of the dimming film 16 in the upper part of the laminated glass 10 overlaps with the second shielding layer 15. This prevents the periphery of the dimming film 16 from being seen from both inside and outside the vehicle.

[0061] The first shielding layer 14 is preferably positioned where it completely overlaps with the transmissive portion 128 from a top-view perspective of the second glass plate 12. That is, the periphery of the first shielding layer 14 preferably coincides with the periphery of the second main surface 112 of the first glass plate 11. This reliably prevents the periphery of the dimming film 16 from being seen from the outside of the vehicle. However, the first shielding layer 14 may not completely overlap with the transmissive portion 128 from a top-view perspective of the second glass plate 12; in other words, it may partially overlap with the transmissive portion 128 and have a narrower gap at the periphery of the second main surface 112 of the first glass plate 11 than the transmissive portion 128. That is, the distance from the periphery of the first shielding layer 14 to the periphery of the first glass plate 11 only needs to be less than 5 mm, preferably less than 2 mm, and more preferably less than 1 mm.

[0062] The first shielding layer 14 and the second shielding layer 15 are, for example, opaque colored ceramic layers. The color can be arbitrary, but dark colors such as black, brown, gray, and navy blue, or white, are preferred, with black being more preferable. The first shielding layer 14 and the second shielding layer 15 can also be a colored film with light-blocking properties, or a combination of a colored film and a colored ceramic layer. The colored film can also be integrated with an infrared reflective film, etc. Furthermore, at least the portion of the interlayer film 13 located closer to the outer edge of the vehicle than the dimming film 16 can be used as a colored interlayer film. In this case, the colored interlayer film located closer to the outer edge of the vehicle than the dimming film 16 functions as the first shielding layer 14.

[0063] The width of the first shielding layer 14 from a top-view perspective is, for example, about 10 mm to 100 mm. More preferably, the width of the first shielding layer 14 from a top-view perspective is 20 mm or more. Further preferably, the width of the first shielding layer 14 from a top-view perspective 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 in the laminated glass 10 allows for concealment even if the periphery of the dimming film 16 deteriorates. Furthermore, even when using an adhesive composed of a resin such as polyurethane to hold the periphery of the laminated glass 10 to the vehicle body, degradation of the adhesive due to ultraviolet radiation can be suppressed.

[0064] The first masking layer 14 and the second masking layer 15 can be formed, for example, by applying a ceramic color paste containing molten glass frit containing black pigment onto a glass plate via screen printing and firing. However, the method of forming the first masking layer 14 and the second masking layer 15 is not limited to this method. The first masking layer 14 and the second masking layer 15 can also be formed, for example, by applying an organic ink containing black or dark pigment onto a glass plate via screen printing and drying it.

[0065] The dimming 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, a wiring 17 for supplying power from the outside of the laminated glass 10 to the dimming film 16 is connected. When a voltage is applied to the dimming film 16 via the wiring 17 from a power source such as a battery, the visible light transmittance of the dimming film 16 will switch according to the applied voltage. Furthermore, even when the laminated glass 10 is installed on the vehicle and the laminated glass 10 is completely closed, the wiring 17 is still located closer to the lower side than the body waistline BL. Therefore, the wiring 17 is not visible when the laminated glass 10 is installed on the vehicle.

[0066] The dimming film 16 is sealed inside the intermediate film 13. That is, the dimming film 16 is surrounded by the intermediate film 13. The planar shape of the dimming film 16 can be smaller than the planar shape of the laminated glass 10. That is, the periphery of the dimming film 16 is located closer to the inside in the planar direction than 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.

[0067] The dimming film 16, for example, comprises two transparent substrates with conductive layers facing each other and a dimming layer disposed between the two transparent substrates. The dimming layer is, for example, selected from one or more of a suspended particle device, a polymer-dispersed liquid crystal, a polymer network liquid crystal, a host-guest type liquid crystal, a photochromic material, an electrochromic material, and an electrodynamic material. The dimming layer is preferably selected from one or more of a suspended particle device, a polymer-dispersed liquid crystal, a polymer network liquid crystal, and a host-guest type liquid crystal. The thickness of the dimming film 16 is, for example, between 0.1 mm and 1 mm. The thickness of the dimming film 16 can be less than 0.8 mm or less, or less than 0.5 mm. Furthermore, the thickness of the dimming film 16 can be 0.3 mm or more.

[0068] like Figure 2As shown, 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, the outer peripheral side of which can be sealed by a sealant 166. The sealant 166 is resin or adhesive tape. Sealing means surrounding at least the outer peripheral side of the dimming layer 163 with the specified sealant 166, so that the outer peripheral side of the dimming layer 163 does not come into contact with air or the intermediate film 13. Sealing the outer peripheral side of the dimming film 16 can suppress the deterioration that occurs at the periphery of the dimming film 16. Among the resins, acrylic, epoxy, silicone and other curing resins are suitable. The curing resin can be a resin that is cured by heat or light and moisture, or it can be a two-component curing resin composed of a main material and a curing agent. The color of the curing resin is preferably transparent, but it is not limited to transparent, and it can also be black or white. Suitable substrates 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 polyurethane resins.

[0069] like Figure 3 As shown, the transparent substrate 161 with conductive layer 162 and the transparent substrate 165 with conductive layer 164, which face each other, can have different sizes. Specifically, one of the transparent substrate 161 with conductive layer 162 and the transparent substrate 165 with conductive layer 164 can be larger than the other, and their peripheral portions do not overlap when viewed from above, which is called "half-cut". Considering the ease with which the cured resin that becomes the sealant 166 can be retained after coating, the dimming film 16 is preferably half-cut at its peripheral portion.

[0070] From a top-down view, the sealing width of the dimming film 16 is preferably between 2 mm and 20 mm. If the sealing width is 2 mm or more, the end deterioration of the dimming film can be sufficiently suppressed. If the sealing width is less than 20 mm, the appearance deterioration caused by the first shielding layer 14 and the second shielding layer 15 can be reduced.

[0071] From the top view of the second glass plate 12, the distance X between the periphery (both the inner and outer peripheries) of the second shielding layer 15 at the upper edge of the laminated glass 10 and the periphery of the dimming film 16 (refer to...) Figure 1B The distance X is preferably less than 10 mm. If the distance X is less than 10 mm, the appearance degradation caused by the second shielding layer 15 as seen from inside the vehicle can be suppressed. From the top view of the second glass panel 12, the distance X can be 0 mm. Regarding the distance X, the direction from the inner and outer surfaces towards the inner surface can be set as positive. That is, at the upper edge of the laminated glass 10, the distance X is preferably greater than 0 mm. In addition, the distance X can also be applied to the side edge of the laminated glass 10 as needed.

[0072] Figure 4The diagram shown illustrates the glass slide. Figure 4 The glass slide 180 shown is a sealing component made of resin or similar material, installed on the vehicle window frame. It fills the gap between the laminated glass 10 and the vehicle window frame, preventing noise or wind and rain from entering the vehicle interior. The glass slide 180 is configured to engage with the upper and side edges of the laminated glass 10, and the side edges of the laminated glass 10 rise and fall while being held by the glass slide 180. The following description focuses on the upper edge of the laminated glass 10, but it also applies to one or both side edges. If the laminated glass 10 slides and moves to its uppermost position, then... Figure 4 As shown, the upper edge of the laminated glass 10 is held by the glass slide 180. Even when the laminated glass 10 slides and moves to the uppermost position, the second shielding layer 15 does not contact the glass slide 180. In other words, the glass slide 180 only contacts the transmissive portion 128 of the fourth main surface 124 of the second glass plate 12 and the second shielding layer 15. Furthermore, the portion of the glass slide 180 that only contacts the transmissive portion 128 of the fourth main surface 124 of the second glass plate 12 and the second shielding layer 15 can be only the upper edge, only one or both of the side edges, or one or both of the upper edge and the side edges.

[0073] Thus, in the laminated glass 10, a transmissive portion 128 is provided at the periphery of the fourth main surface 124 of the second glass plate 12 at the upper edge. Furthermore, the width W of the transmissive portion 128... B The value is set so that even when the laminated glass 10 moves to its uppermost position, the second shielding layer 15 does not come into contact with the glass track 180. This prevents damage to the upper part of the second shielding layer 15 from friction with the glass track 180, even when the laminated glass 10 is installed on a vehicle and repeatedly raised and lowered. In other words, when the laminated glass 10 is used as a sliding glass, its durability against sliding is improved. The portion of the laminated glass 10 parallel to the sliding direction rubs against the glass track 180 for a long time and frequently. Therefore, by providing a transmissive portion 128 on one or both sides of the laminated glass 10, the portion of the second shielding layer 15 located on one or both sides of that side does not come into contact with the glass track 180 when the laminated glass 10 slides, thereby improving the scratch resistance of the laminated glass 10.

[0074] Furthermore, in the laminated glass 10, a first shielding layer 14 is provided at the upper part between the first main surface 111 of the first glass plate 11 and the dimming film 16. This prevents the periphery of the dimming film 16 from being visible from the outside of the vehicle, thus suppressing any deterioration in the appearance as seen from outside the vehicle.

[0075] Furthermore, in the laminated glass 10, from a top-view perspective, a second shielding layer 15 is provided inside the transmissive portion 128 on the fourth main surface 124 of the second glass plate 12, overlapping with the periphery of the dimming film 16 in the upper edge of the laminated glass 10. This prevents the periphery of the dimming film 16 from being visible from inside the vehicle, thus suppressing visual degradation from the inside of the vehicle. Additionally, the overlapping mentioned here also includes... Figure 1B The case where X = 0.

[0076] Furthermore, in the laminated glass 10, the width W of the second shielding layer 15 A [mm] and the aforementioned distance X [mm] preferably satisfy W A -X≥5. Therefore, even if the periphery of the dimming film 16 deteriorates over time, the deteriorated portion can be shielded, thus suppressing appearance degradation as seen from inside the vehicle. The deterioration of the dimming film 16 over time is caused by moisture or components of the intermediate film 13 seeping from the periphery of the dimming film 16 into the interior. Through research, the inventors discovered that although the color changes at the deteriorated portion of the dimming film 16, the growth in the width of the deteriorated portion reaches saturation at a fixed location and does not continue to expand. Therefore, to satisfy W... A The second shielding layer 15 is set with -X≥5 so that it can still shield the deteriorated parts of the dimming film 16 even after time has passed.

[0077] From the perspective of shielding the degraded portion of the dimming film 16, W A The value of -X only needs to be 5 or higher. If W A If the value of -X is too large, the width of the second shielding layer 15 will be excessively increased, leading to reduced visibility as vehicle glass. Therefore, W A The value of -X is preferably below 35, for example.

[0078] Figures 5-7 The image shown is a partial enlarged view of another example near the top edge of laminated glass. (See attached image.) Figure 5 As shown, the first shielding layer 14 may have a dotted area 141. That is, the first shielding layer 14 may have a semi-shielded portion 134, and the semi-shielded portion 134 may have a dotted area 141. Furthermore, Figure 5 In the first shielding layer 14, in addition to the semi-shading portion 134 (point area 141), there is also a shielding portion 130. Furthermore, as... Figure 6 and Figure 7 As shown, the first shielding layer 14 may also have a line area 142. The semi-shielded portion 134 may also have a line area 142. Additionally, Figure 6 and Figure 7In this case, the first shielding layer 14 may also have a shielding portion 130 in addition to the semi-shielded portion 134 (line region 142). From a top-view perspective of the second glass plate 12, the periphery of the second shielding layer 15 (e.g., the periphery on the inner side of the surface) may overlap with the dot region 141 or line region 142 of the first shielding layer 14. In this case, since the periphery of the second shielding layer 15 is not easily noticeable, it is aesthetically preferable.

[0079] Alternatively, the second shielding layer 15 may also have a dot region 141 or a line region 142. That is, the second shielding layer 15 may have a semi-shielded portion 134, and the semi-shielded portion 134 may have a dot region 141 or a line region 142. In this case, from a top-view perspective, even if the dot region 141 overlaps with the periphery of the dimming film 16, it can still be seen with... Figure 1A and 1B The same effect of shielding the periphery of the dimming film 16 is achieved. From a top view of the first glass plate 11, the periphery of the first shielding layer 14 (e.g., the periphery on the inner side of the surface) can overlap with the dot region 141 or line region 142 of the second shielding layer 15. In this case, since the periphery of the first shielding layer 14 is not easily noticeable, it is aesthetically preferable.

[0080] The dot region 141 is an area arranged in a manner where multiple dots are scattered along the periphery of the first shielding layer 14 from a top-view perspective. The shape or size of the dots in the dot region 141 can be determined as needed, for example, as a circle or a semicircle of approximately 0.5mm to 2.5mm in diameter. In the dot region 141, from a top-view perspective, the dots are arranged, for example, in multiple rows at equal intervals. The size or density of the dots in each row can be varied. For example, the density of the dots can be adjusted by gradually thinning them out towards the upper or lower side of the laminated glass 10, thereby forming a gradient pattern. The dot region 141 of the first shielding layer 14 can enhance the design flexibility of the laminated glass 10.

[0081] Line region 142 is an area arranged with multiple lines spaced apart along the periphery of the first shielding layer 14 from a top-view perspective. In line region 142, the multiple lines can be approximately parallel to the periphery of the first shielding layer 14, or they can be at an angle. Furthermore, the number or width of the lines can be determined as needed; for example, the line width can be 0.1 mm to 89.7 mm, and the line spacing can be 0.1 mm to 89.7 mm. The density of the lines can be adjusted by gradually thinning them out towards the upper or lower side of the laminated glass 10, thereby forming a gradient pattern. The first shielding layer 14 having line region 142 can enhance the design of the laminated glass 10.

[0082] Furthermore, when the first shielding layer 14 has a point region 141, the periphery near the shielding portion 130 of the point region 141 can be a line formed by connecting the front ends of the points furthest from the periphery of the first glass plate 11 among a plurality of points. When the first shielding layer 14 has a line region 142, the periphery near the shielding portion 130 of the line region 142 can be a line furthest from the periphery of the first glass plate 11 (if the line has a certain angle, it is a line formed by connecting the front ends of the lines). The same applies to the second shielding layer 15. The above is explained using... Figures 5-7 The shielding layer near the upper part of the laminated glass has been described, but the point area 141 or the line area 142 may be provided only at the upper part of the laminated glass, or only at one or both sides, or only at the upper part and one or both sides.

[0083] Figure 8A and 8B The figure shown is a modified example of the laminated glass according to the first embodiment. Figure 8A The diagram shown is a schematic representation of the shape of the laminated glass as seen from the normal direction of the second glass plate. Figure 8B The following is along Figure 8A A partially enlarged sectional view of line AA.

[0084] like Figure 8B As shown, the laminated glass 20 is a vehicle-use laminated glass having a first glass plate 11, a second glass plate 12, an interlayer film 13, a first shielding layer 14, a second shielding layer 15, and a dimming film 16. The laminated glass 20 has a lower edge portion located on the lower side when the laminated glass 20 is installed on a vehicle, an upper edge portion located on the upper side when the laminated glass 20 is installed on a vehicle and facing the lower edge portion, and a pair of side portions connecting the lower edge portion and the upper edge portion. Figure 8B The image shown is a cross-sectional view near the upper edge of the laminated glass 20.

[0085] Furthermore, laminated glass 20 differs from laminated glass 10 in that it does not have a transmissive portion at the periphery of the fourth main surface 124 at the second glass plate 12. Additionally, laminated glass 20 differs from laminated glass 10 in that the second shielding layer has a semi-shielding portion 134 extending inward from the periphery of the fourth main surface 124 in the surface direction. All other aspects are the same as those of laminated glass 10, therefore, the description of laminated glass 10 will be used as a reference.

[0086] Figure 8A and Figure 8B In the example, the first shielding layer 14 has a shielding portion 130, while the second shielding layer 15 has a semi-shielding portion 134.

[0087] From a top-view perspective of the second glass panel 12, the periphery of the dimming film 16 in the upper part of the laminated glass 20 overlaps with the first shielding layer 14. Furthermore, from a top-view perspective of the second glass panel 12, the periphery of the dimming film 16 in the upper part of the laminated glass 20 overlaps with the second shielding layer 15. Therefore, the periphery of the dimming film 16 can be prevented from being seen from both inside and outside the vehicle.

[0088] Furthermore, at the fourth main surface 124 of the second glass plate 12, the second shielding layer 15 has a semi-shielded portion 134 at the part that contacts the glass slide. Therefore, the sliding noise caused by the friction between the glass slide and the second shielding layer 15 is more easily reduced than when the second shielding layer 15 forms a shield.

[0089] The first glass plate 11, the second glass plate 12, and the interlayer film 13 will be described in detail below. Furthermore, although the following description uses the term laminated glass 10, the description is equally applicable to laminated glass 20.

[0090] 〔glass plate〕

[0091] The first glass plate 11 and the second glass plate 12 can be formed from either inorganic glass or organic glass. As inorganic glass, examples include soda-lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, quartz glass, etc., with no particular limitation. From the viewpoint of damage resistance, the first glass plate 11, located on the outside of the laminated glass 10, is preferably formed from inorganic glass, and from the viewpoint of formability, it is preferably formed from soda-lime glass. When the first glass plate 11 and the second glass plate 12 are formed from soda-lime glass, transparent glass, green glass containing a specified amount or more of iron, and UV-blocking green glass can be suitably used. Furthermore, at least one of the first glass plate 11 and the second glass plate 12 can be so-called privacy glass with a dark color such as gray. Privacy glass is described in detail, for example, in International Publication No. 2015 / 088026, the contents of which are referenced in this specification.

[0092] Inorganic glass can be either unstrengthened glass or strengthened glass. Unstrengthened glass is made by forming molten glass into a sheet and then annealing it. Strengthened glass is made by forming a compressive stress layer on the surface of unstrengthened glass.

[0093] Tempered glass can be either physically strengthened glass, such as air-cooled strengthened glass, or chemically strengthened glass. In the case of physically strengthened glass, the glass surface can be strengthened by operations other than annealing, such as rapidly cooling a uniformly heated glass sheet from a temperature near its softening point during bending and forming, utilizing the temperature difference between the glass surface and the interior of the glass to create a compressive stress layer on the glass surface.

[0094] In the case of chemically strengthened glass, the glass surface can be strengthened by inducing compressive stress on the glass surface, for example, after bending and forming, using methods such as ion exchange. Furthermore, glass that absorbs ultraviolet or infrared radiation can also be used, and the glass sheet is preferably transparent, but glass sheets that are colored to a degree that does not impair transparency can also be used.

[0095] Materials used for acrylic glass include polycarbonate, acrylic resins such as polymethyl methacrylate, polyvinyl chloride, and transparent resins such as polystyrene.

[0096] The forming method of the first glass plate 11 and the second glass plate 12 is not particularly limited. For example, in the case of inorganic glass, glass plates formed by float glass or the like are preferred. The shapes of the first glass plate 11 and the second glass plate 12 are not limited to rectangular or trapezoidal, but can also be processed into various shapes and curvatures.

[0097] The thinnest part of the thickness of the first glass plate 11 is preferably 1.1 mm to 3 mm. If the thickness of the first glass plate 11 is 1.1 mm or more, the strength, such as its resistance to flying stones, is sufficient. If it is 3 mm or less, the mass of the laminated glass 10 will not be too large, which is preferable from the perspective of vehicle fuel consumption. The thinnest part of the thickness of the first glass plate 11 is more preferably 1.8 mm to 2.8 mm, even more preferably 1.8 mm to 2.6 mm, even more preferably 1.8 mm to 2.2 mm, and even more preferably 1.8 mm to 2.0 mm.

[0098] The thickness of the second glass plate 12 is preferably between 0.3 mm and 2.3 mm. If the thickness of the second glass plate 12 is above 0.3 mm, the operability is good; if it is below 2.3 mm, the weight will not be too great.

[0099] Furthermore, if the thickness of the second glass plate 12 is not suitable, and the first glass plate 11 and the second glass plate 12 are formed as two pieces of glass with particularly deep curvature, the shapes of the two pieces will be mismatched, which will have a great impact on the glass quality, such as residual stress after pressing.

[0100] However, by making the thickness of the second glass plate 12 between 0.3 mm and 2.3 mm, glass quality such as residual stress can be maintained. Making the thickness of the second glass plate 12 between 0.3 mm and 2.3 mm is particularly effective in maintaining the glass quality of glass with a deep curvature. Furthermore, the thickness of the second glass plate 12 is more preferably between 0.5 mm and 2.1 mm, and even more preferably between 0.7 mm and 1.9 mm. Within this range, the aforementioned effects become more significant.

[0101] The outer side of the first glass plate 11 and / or the second glass plate 12 may be provided with a coating that has water-repellent, ultraviolet or infrared blocking functions, or a coating with low reflectivity and low emissivity. In addition, the side of the first glass plate 11 and / or the second glass plate 12 that is in contact with the intermediate film 13 may also be provided with a coating that has ultraviolet or infrared blocking, low emissivity, visible light absorption, coloring, etc.

[0102] When the first glass plate 11 and the second glass plate 12 are formed from inorganic glass in a curved shape, the first glass plate 11 and the second glass plate 12 can be bent after float glass forming and before being bonded by an intermediate film 13. Bending is performed by heating to soften the glass. The heating temperature of the glass during bending is controlled within the range of approximately 550°C to 700°C. The bending of the first glass plate 11 and the second glass plate 12 can be performed using gravity forming, pressure forming, roll forming, etc.

[0103] [Intermediate membrane]

[0104] As the interlayer 13, thermoplastic resins are commonly used, such as plasticized polyvinyl acetal resins, plasticized polyvinyl chloride resins, saturated polyester resins, plasticized saturated polyester resins, polyurethane resins, plasticized polyurethane resins, ethylene-vinyl acetate copolymer resins, ethylene-ethyl acrylate copolymer resins, cycloolefin polymer resins, ionomer resins, and other thermoplastic resins conventionally used for this purpose. Alternatively, the resin composition containing modified block copolymer hydrogenates described in Japanese Patent No. 6065221 may also be suitably used.

[0105] Considering the excellent balance of various properties such as transparency, weather resistance, strength, adhesion, penetration resistance, impact energy absorption, moisture resistance, thermal insulation, and sound insulation, plasticized polyvinyl alcohol acetal resins are suitable. These thermoplastic resins can be used alone or in combination of two or more. The term "plasticized" in the context of plasticized polyvinyl alcohol acetal resins indicates that plasticization can be achieved by adding plasticizers. The same meaning applies to other plasticized resins.

[0106] However, when a specific substance is encapsulated in the intermediate film 13, depending on the type of substance, it may deteriorate due to a specific plasticizer. In such cases, it is preferable to use a resin that is substantially free of the plasticizer. Examples of plasticizer-free resins include ethylene-vinyl acetate copolymer (EVA) resins.

[0107] Examples of polyvinyl alcohol acetal resins include polyvinyl alcohol formal resins obtained by reacting polyvinyl alcohol (PVA) with formaldehyde, polyvinyl alcohol acetal resins (in the narrow sense) obtained by reacting PVA with acetaldehyde, and polyvinyl alcohol butyral (PVB) resins obtained by reacting PVA with n-butyraldehyde. Among these, PVB is suitable from the perspective of a superior balance of various properties, including transparency, weather resistance, strength, adhesion, penetration resistance, impact energy absorption, moisture resistance, thermal insulation, and sound insulation. These polyvinyl alcohol acetal resins can be used alone or in combination of two or more types.

[0108] However, the material forming the intermediate film 13 is not limited to thermoplastic resins. Furthermore, the intermediate film 13 can contain functional particles such as infrared absorbers, ultraviolet absorbers, and luminescent agents. Additionally, the intermediate film 13 can also have a colored portion known as a light-shielding band. As for the coloring pigment used to form the colored portion, any pigment suitable for use in plastics and whose addition amount is adjusted to achieve a visible light transmittance of less than 40% can be used. Examples include organic coloring pigments such as azo dyes, phthalocyanines, quinacridones, perylene oxides, pyrene oxides, dioxazines, anthraquinones, and isoindolineones, or inorganic coloring pigments such as oxides, hydroxides, sulfides, chromic acid, sulfates, carbonates, silicates, phosphates, arsenates, ferrocyanides, carbon, and metal powders. These coloring pigments can be used alone or in combination of two or more.

[0109] The interlayer 13 can have multiple layers. For example, the interlayer 13 can have three or more layers. For example, if the interlayer is formed of three or more layers, and the shear modulus of any layer other than the two side layers is less 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 modulus of the two side layers can be the same or different.

[0110] The thinnest portion of the interlayer film 13 is preferably 0.5 mm or more. Furthermore, when the interlayer film 13 has multiple layers, the thickness of the interlayer film 13 refers to the total thickness of each layer. When the thickness of the thinnest portion of the interlayer film 13 is 0.5 mm or more, the impact resistance necessary for laminated glass is sufficient. Moreover, the thickest portion of the interlayer film 13 is preferably 3 mm or less. If the maximum thickness of the interlayer film 13 is 3 mm or less, the mass of the laminated glass will not be excessive. The maximum thickness of the interlayer film 13 is more preferably 2.8 mm or less, and even more preferably 2.6 mm or less.

[0111] Furthermore, when the interlayer 13 has multiple layers, it is preferable that each layer contained in the interlayer 13 is formed of the same material, but it is also possible to form them with different materials. However, from the viewpoint of adhesion to the first glass plate 11 and the second glass plate 12, or the functional materials incorporated into the laminated glass 10, it is desirable that more than 50% of the thickness of the interlayer 13 be formed of the aforementioned materials.

[0112] When manufacturing the interlayer film 13, for example, the resin material used to form the interlayer film 23 is appropriately selected, and extrusion molding is performed using an extruder in a heated molten state. Extrusion conditions such as the extrusion speed of the extruder are set to uniformly prepare the interlayer film 13. Then, the resin film obtained by extrusion molding is matched to the design of the laminated glass, for example, by stretching it as needed to give the upper and lower edges curvature, thereby completing the interlayer film 13.

[0113] Laminated glass

[0114] 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. Furthermore, if the total thickness of the laminated glass 10 is 10 mm or less, sufficient transmittance can be obtained while reducing haze.

[0115] At least one edge of the laminated glass 10, the plate deviation between the first glass plate 11 and the second glass plate 12 is preferably less than 1.5 mm, more preferably less than 1 mm. Here, the plate deviation between the first glass plate 11 and the second glass plate 12 refers to the deviation between the outer peripheral side surface of the first glass plate 11 and the outer peripheral side surface of the second glass plate 12 when viewed from above.

[0116] At at least one edge of the laminated glass 10, the plate deviation of the first glass plate 11 and the second glass plate 12 is less than 1.5 mm, which is suitable in terms of not impairing the appearance. At at least one edge of the laminated glass 10, the plate deviation of the first glass plate 11 and the second glass plate 12 is less than 1.0 mm, which is more suitable in terms of not impairing the appearance. Furthermore, at the lower edge of the laminated glass 10, the plate deviation of the first glass plate 11 and the second glass plate 12 may be greater than 1.0 mm. For secure installation of the bracket 160, etc., described later, at least one of the first glass plate 11 and the second glass plate 12 may have a through hole.

[0117] When manufacturing laminated glass 10, an interlayer film 13 is sandwiched between the first glass plate 11 and the second glass plate 12 to form a laminate. Furthermore, the laminate is placed in, for example, a rubber bag or rubber chamber, a resin bag, etc., and pressed in a vacuum with a gauge pressure controlled within the range of -100 kPa to -65 kPa, while controlling the temperature within the range of approximately 70°C to 110°C. The heating conditions, temperature conditions, and lamination method can be appropriately selected.

[0118] After pressing, for example, if the pressing process is carried out under conditions of temperature control within the range of 100℃~150℃ and absolute pressure control within the range of 0.6MPa~1.3MPa, a laminated glass 10 with better durability can be obtained. However, depending on the circumstances, considering the simplification of the process and the characteristics of the material sealed in the laminated glass 10, this heating and pressing process is sometimes not used.

[0119] Alternatively, a method known as "cold bending" can be used, in which one or both of the first glass plate 11 and the second glass plate 12 are joined together in an elastically deformed state. Cold bending can be achieved by using a laminate consisting of a first glass plate 11, an intermediate film 13, and a second glass plate 12 temporarily fixed with adhesive tape or other means, as well as conventionally known pre-compression devices such as clamping rollers, rubber bags, rubber chambers, and autoclaves.

[0120] Without impairing the effectiveness of this application, in addition to the interlayer film 13, a film and device with functions such as heating wire, infrared reflection, light emission, power generation, dimming, touch screen, visible light reflection, scattering, decoration, and absorption may also exist between the first glass plate 11 and the second glass plate 12. Furthermore, a film with functions such as anti-fogging, water repellency, heat insulation, and low reflection may also exist on the surface of the laminated glass 10. Additionally, a film with functions such as heat insulation and heat generation may also exist on the first main surface 111 of the first glass plate 11 or the fourth main surface 124 of the second glass plate 12.

[0121] [Vehicle Window Structure]

[0122] Figure 9 The diagram shown illustrates the structure of a window used in a vehicle. Figure 9 As shown, when the laminated glass 10 is a side door glass that can slide vertically, a bracket 160 or a lifting device 170 is provided inside the door panel. Furthermore, a glass slide groove 180 is mainly provided above the lifting device 170 to hold the upper and side edges of the laminated glass 10. Additionally, although... Figure 9 Detailed illustrations are omitted, but at the upper edge of the laminated glass 10, it is similar to... Figure 4As in the example shown, the glass groove 180 contacts only the transmissive portion 128 on the fourth main surface 124 of the second glass plate 12 and the second shielding layer 15. The distance from the glass groove 180 to the second shielding layer 15, i.e., the width of the transmissive portion 128 as seen when viewing the laminated glass 10 from inside the vehicle, can be 0 mm or more, preferably greater than 0 mm, can be 1 mm or more, can be 2 mm or more, or can be 3 mm or more. If the distance from the glass groove 180 to the second shielding layer 15 is greater than 0 mm, scratch resistance is improved even when considering manufacturing errors or vehicle vibrations during use. There is no particular upper limit to this width; for example, it can be less than 10 mm, less than 8 mm, or less than 6 mm. If the width is less than 10 mm, the appearance deterioration caused by the second shielding layer 15 can be suppressed.

[0123] Figure 9 The image shows the laminated glass 10, which can slide in the vertical direction, in a fully closed state (at the topmost position). Figure 9 In this state, the upper and side edges of the laminated glass 10 are held in the glass groove 180. In addition, even when fully closed, the laminated glass 10 is located inside the door panel below the body waistline BL of the laminated glass 10, so it is not exposed to the outside.

[0124] The bracket 160 is a support member that slidably supports the laminated glass 10. The bracket 160 is formed, for example, of polyurethane, and supports at least one of a pair of glass panes. Specifically, the bracket 160 supports, for example, the lower end of the laminated glass 10, and extends from the lower end to the lower edges of the first and / or second glass panes to support the lower edges of the first and / or second glass panes. Alternatively, the bracket 160 may not support the lower end of the laminated glass 10, but rather support the laminated glass 10 by clamping the two sides of the pair of glass panes. Furthermore, the material of the bracket 160 is not limited to polyurethane.

[0125] The lifting device 170 is a device for raising and lowering the laminated glass 10 by sliding it up and down along the glass slide 180. The lifting device 170 is, for example, an arm-type adjuster, which consists of two arms 171 and 172, a lifting rail 173, and a fixed rail 174. The bracket 160 is mounted on the lifting rail 173 of the lifting device 170.

[0126] Two arms 171 and 172 are rotatably connected to each other around a pivot point 175. A lifting rail 173 extends horizontally and is a rail that can move up and down relative to the door. The upper ends of arms 171 and 172 are mounted on the lifting rail 173 in a horizontally slidable manner. Furthermore, a fixed rail 174 extends horizontally and is fixed to the door.

[0127] The lower end of arm 171 is mounted on fixed rail 174 in a manner that allows it to slide horizontally, and the lower end of arm 172 is connected to adjuster via gear 176. In this configuration, gear 176 is driven by adjuster, arms 171 and 172 rotate about fulcrum 175, and lifting rail 173 rises and falls. However, the lifting device 170 is not limited to this configuration and can also be a lifting device utilizing lead wires, etc.

[0128] <Examples and Comparative Examples>

[0129] The following describes the embodiments and comparative examples, but the present invention is not limited to these examples. In addition, Examples 1 and 4 are embodiments, and Examples 2 and 3 are comparative examples.

[0130] [Example 1]

[0131] Privacy glass with a thickness of 2mm was prepared for both the first glass panel (outer side glass panel) and the second glass panel (inner side glass panel) used in the manufacturing of laminated glass. Additionally, two 0.38mm thick PVB films (RK11 manufactured by Eastman Chemical Japan Co., Ltd.) were prepared as an interlayer, and a 0.4mm thick polymer-dispersed liquid crystal (PDLC) film was prepared as a dimming film.

[0132] The first glass panel is a glass panel on the second main surface of the interior side of the vehicle, which is printed with black ceramic as a first shielding layer when it is manufactured into laminated glass. The second glass panel is a glass panel on the fourth main surface of the interior side of the vehicle, which is printed with black ceramic as a second shielding layer when it is manufactured into laminated glass. In addition, the dimensional relationship between the first shielding layer and the second shielding layer is shown in Example 1 of Table 1, which will be described later.

[0133] Subsequently, the first glass plate, the first interlayer film, the dimming film, the second interlayer film, and the second glass plate are sequentially arranged to form a laminate. The gauge pressure is controlled within the range of -100 kPa to -65 kPa, and the lamination is performed in a vacuum at a temperature controlled within the range of approximately 70°C to 110°C. Further, the laminated glass is prepared by heating and pressurizing under conditions controlled within the range of 100°C to 150°C and absolute pressure controlled within the range of 0.6 MPa to 1.3 MPa.

[0134] [Example 2]

[0135] Except for the dimensional relationship between the first and second shielding layers as shown in Example 2 of Table 1 described later, the laminated glass was prepared in the same manner as in Example 1.

[0136] [Example 3]

[0137] Except for the dimensional relationship between the first and second shielding layers as shown in Example 3 of Table 1 described later, the laminated glass was prepared in the same manner as in Example 1.

[0138] [Example 4]

[0139] Except for the dimensional relationship between the first and second shielding layers as shown in Example 4 of Table 1 described later, the laminated glass was prepared in the same manner as in Example 1.

[0140] [evaluate]

[0141] The laminated glass prepared in Examples 1 to 4 were installed on vehicle door panels, and repeated up-and-down lifting tests were conducted. A dusting liquid was sprayed onto each laminated glass panel after every 100 lifts, and then 5000 lifts were performed. The appearance after 5000 lifts was visually inspected; scratches on the fourth main surface of the second glass panel were marked as "poor," and no scratches were marked as "good." The dusting liquid used was water containing two and eight test powders as specified in JIS Z 8901:2006.

[0142] Furthermore, the laminated glass prepared in Examples 1 to 4 were placed in a constant temperature bath at 90°C for heat resistance testing. After 1000 hours, each piece of laminated glass was removed from the constant temperature bath, and the extent of deterioration at the periphery of the dimming film was evaluated to determine whether it was visible from inside the vehicle. Specifically, from inside the vehicle, the condition where the deteriorated portion of the dimming film was exposed through the second shielding layer was considered "poor," while the condition where it was not visible was considered "good." Additionally, the laminated glass used in the lift test was different from the laminated glass used in the heat resistance test.

[0143] [Table 1]

[0144] Example 1 Example 2 Example 3 Example 4 <![CDATA[W A [mm]]]> 20 20 10 30 X[mm] 3 3 6 3 <![CDATA[W A -X[mm]]]> 17 17 4 27 <![CDATA[W B [mm]]]> 5 2 5 10 L[mm] 4 4 4 4 Lifting test good bad good good Heat resistance test good good bad good

[0145] As shown in Table 1, the results of the lifting test are as follows: Example 2 is "poor", while Examples 1, 3, and 4 are "good". That is, in Example 2, the width W of the transmission section... B The width is as narrow as 2mm, so the second shielding layer comes into contact with the glass groove and gets scratched. On the other hand, in Examples 1, 3 and 4, the width W of the transmission section is... B At a thickness of 5mm or more, the second shielding layer does not come into contact with the glass groove, and therefore no scratches are generated.

[0146] Furthermore, the results of the heat resistance test were as follows: Example 3 was "poor," while Examples 1, 2, and 4 were "good." That is, in Example 3, W... A -X is as narrow as 4mm, so the second shielding layer cannot completely hide the deteriorated parts at the periphery of the dimming film, and the deteriorated parts can be seen from the inside of the vehicle. On the other hand, in Examples 1, 2 and 4, W A- With an X of 17mm or more, the second shielding layer can fully hide the deteriorated parts at the periphery of the dimming film, so the deteriorated parts are not visible from the inside of the vehicle.

[0147] The preferred embodiments have been described in detail above, but the embodiments are not limited thereto. Various modifications or substitutions may be made to the embodiments without departing from the scope of the claims.

[0148] Furthermore, the entire contents of the description, claims, drawings, and abstract 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 a disclosure of this invention.

[0149] Symbol Explanation

[0150] 10 and 20 laminated glass

[0151] 11. First glass plate

[0152] 12 Second glass plate

[0153] 13 Intermediate membrane

[0154] 14 First Shielding Layer

[0155] 15 Second Shielding Layer

[0156] 16 Dimming film

[0157] 111 Main side 1

[0158] 112 2nd Main Side

[0159] 123 3rd Main Side

[0160] 124 Main side 4

[0161] 128 Transmitting section

[0162] 130 Shelter

[0163] 134 Semi-shaded area

[0164] 141 point area

[0165] 142 line area

[0166] 160 bracket

[0167] 161, 165 Transparent substrate

[0168] 162, 164 conductive layers

[0169] 163 Dimming Layer

[0170] 166 Sealing Material

[0171] 170 Lifting Device

[0172] Arms 171 and 172

[0173] 173 Lifting Rail

[0174] 174 Fixed Track

[0175] 175 fulcrum

[0176] 176 Gears

Claims

1. A laminated glass for a vehicle, The laminated glass for a vehicle has a first glass plate and a second glass plate facing each other, an interlayer film provided between the first glass plate and the second glass plate, and a light-shifting film capable of switching the transmittance of visible light provided inside the interlayer film, wherein It also has a lower edge portion to which a wiring connected to the light-shifting 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, The first glass plate has a first main surface on the opposite side of the interlayer film and a second main surface facing the interlayer film, The second glass plate has a third main surface facing the interlayer film and a fourth main surface on the opposite side of the interlayer film, It has a first shielding layer between the first main surface and the light-shifting film, and a second shielding layer on the fourth main surface, It has the following structure A or structure B, The periphery of the light-shifting film in the upper edge portion overlaps the second shielding layer in the plan view of the second glass plate, The width of the second shielding layer is set as W A mm, the distance between the periphery of the second shielding layer and the periphery of the light control film is set as X mm, W A -X≥5, Structure A: At least one of the side edge portion and the upper edge portion is provided with a transmission portion having a width of 5 mm or more and 25 mm or less at the periphery of the fourth main surface, At least a part of the shielding portion or the semi-shielding portion formed by the second shielding layer is located more inward in the surface direction than the transmission portion; Structure B: The second shielding layer has a semi-shielding portion inward in the surface direction from the periphery of the fourth main surface.

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

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

4. The laminated glass for vehicle according to claim 1, which satisfies W < 0.5 and X < 35. A -X < 35.

5. The laminated glass for vehicle according to claim 1, wherein The distance between the inner edge of the second shielding layer and the inner edge of the first shielding layer is 0 mm or more and 10 mm or less in the plan view of the second glass plate.

6. The laminated glass for a vehicle according to claim 1, wherein The upper edge portion has the first shielding layer, the second shielding layer, and the transmission portion, The width of the transmission portion in the upper edge portion is 5 mm or more and 25 mm or less.

7. The laminated glass for a vehicle according to claim 6, wherein The side edge portion has the first shielding layer, The second shielding layer and the transmission portion are provided only in the upper edge portion.

8. The laminated glass for a vehicle according to claim 1, wherein The side edge portion has the first shielding layer, the second shielding layer, and the transmission portion, The width of the transmission portion in the side edge portion is 3 mm or less.

9. The laminated glass for a vehicle according to claim 1, wherein The side edge portion has the first shielding layer, the second shielding layer, and the transmission portion, The width of the transmission portion in the side edge portion is 5 mm or more and 25 mm or less.

10. The laminated glass for a vehicle according to claim 1, wherein The side edge portion and the upper edge portion have the first shielding layer, the second shielding layer, and the transmission portion, The width of the transmission portion in the side edge portion is 5 mm or more and 25 mm or less, The width of the transmission portion in the upper edge portion is 3 mm or less.

11. The laminated glass for vehicle according to claim 1, wherein The half-shielding portion formed by the first shielding layer or the second shielding layer has a dot region or a line region.

12. The laminated glass for vehicle according to claim 11, wherein The half-shielding portion formed by the first shielding layer has the dot region or the line region, The periphery of the second shielding layer overlaps the dot region or the line region of the first shielding layer in a plan view of the second glass sheet, Alternatively, The half-shielding portion formed by the second shielding layer has the dot region or the line region, The periphery of the first shielding layer overlaps the dot region or the line region of the second shielding layer in a plan view of the first glass sheet.

13. The laminated glass for vehicle according to claim 1, wherein The light-controlling film has two transparent substrates with conductive layers facing each other, and a light-controlling layer containing one or more selected from a suspended particle device, a polymer dispersed liquid crystal, a polymer network liquid crystal, a guest-host liquid crystal, a photochromic substance, an electrochromic substance, and an electrodynamic substance.

14. The laminated glass for vehicle according to claim 1, wherein The outer peripheral side of the light-controlling film is sealed with a resin or an adhesive tape.

15. The laminated glass for vehicle according to claim 1, wherein The intermediate film contains one or more selected from a plasticized polyvinyl acetal resin, a plasticized polyvinyl chloride resin, a saturated polyester resin, a plasticized saturated polyester resin, a polyurethane resin, a plasticized polyurethane resin, an ethylene-vinyl acetate copolymer resin, an ethylene-ethyl acrylate copolymer resin, and a cyclic olefin polymer resin.

16. A window structure for a vehicle, comprising the laminated glass for vehicle according to any one of claims 1 to 15, a support member that supports the laminated glass for vehicle in a slidable manner, and a glass runner that sandwiches the side edge portion and the upper edge portion.

17. The window structure for a vehicle according to claim 16, wherein The glass runner is in contact with only the transmissive portion in the second shielding layer at the transmissive portion and the second shielding layer of at least one of the side edge portion and the upper edge portion.

18. The window structure for a vehicle according to claim 17, wherein The gap between the glass runner and the second shielding layer is 0 mm or more and 10 mm or less. The glass runner is in contact with only the transmissive portion in the second shielding layer at the transmissive portion and the second shielding layer of at least one of the side edge portion and the upper edge portion. The gap between the glass runner and the second shielding layer is 0 mm or more and 10 mm or less.

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