Interlayer film for laminated glass, laminated glass and automobiles

Abstract

To provide an interlayer film for laminated glass, the interlayer film being excellent in unity of appearance.SOLUTION: An interlayer film for laminated glass according to the present invention has a first colored part including a part located on one end side of the interlayer film, and a second colored part including a part located on the other end side of the interlayer film, the first colored part has a first gradation part where visible light transmittance increases from the one end side toward the other end side of the interlayer film, the first gradation part forms a tip of the first colored part on the other end side of the interlayer film, the second colored part has a second gradation part where visible light transmittance increases from the other end side toward the one end side of the interlayer film, the second gradation part forms a tip of the second colored part on the one end side of the interlayer film, and the first gradation part and the second gradation part exist in a specific positional relationship.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an interlayer film for laminated glass used in laminated glass. The present invention also relates to laminated glass and an automobile using the interlayer film for laminated glass. [Background technology]

[0002] Laminated glass is known, in which an interlayer film for laminated glass is sandwiched between a pair of glass sheets. This laminated glass is widely used in automobiles, railway vehicles, aircraft, ships, buildings, and the like. In recent years, laminated glass with privacy protection properties has been demanded as laminated glass for buildings and automobiles. Laminated glass with privacy protection properties, for example, allows light to pass through, but there are areas where people or objects located behind the laminated glass cannot be seen.

[0003] As an example of laminated glass with privacy protection properties, Patent Document 1 below discloses laminated glass using a multilayer interlayer film with an opaque layer. In this laminated glass, privacy protection is achieved by the opaque layer that makes it impossible to see people or objects behind the laminated glass.

[0004] The following Patent Documents 2 and 3 disclose laminated glass using an interlayer film having a gradation pattern. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] WO2006 / 082800A1 [Patent Document 2] WO2014 / 077328A1 [Patent Document 3] WO2015 / 072538A1 Summary of the Invention [Problem to be solved by the invention]

[0006] With the advancement of laminated glass design technology, the applications of laminated glass have become more diverse. Also, rear window glass and roof window glass are well known as laminated glass. For such rear window glass and roof window glass, tinted laminated glass with privacy protection properties may be used.

[0007] Another new example of laminated glass is a rear-roof integrated glass in which the rear window and roof glass are integrated or appear to be integrated. Even in such a rear-roof integrated glass, tinted laminated glass with privacy protection properties may be used.

[0008] In addition, some countries require automobiles to have high-mounted stop lamps, which are expected to improve the aerodynamic characteristics of automobiles.

[0009] However, when tinted laminated glass having privacy protection properties as described in Patent Document 1 is used as an interlayer film for roof glass, rear glass, and rear-roof integrated glass, light emitted from a high-mounted stop lamp may not be sufficiently transmitted through the laminated glass.

[0010] Patent Documents 2 and 3, such as Figure 1, disclose an interlayer film having a colored region only on one end side of the interlayer film. In this interlayer film, the thickness of one colored region continuously decreases toward the inside of the interlayer film's surface. Therefore, one colored region imparts a gradation pattern to the interlayer film. When this interlayer film is used as an interlayer film for roof glass, rear glass, and rear roof integrated glass, light emitted from the high-mounted stop lamp passes through the uncolored region but does not sufficiently pass through the colored region. As a result, the colored region and the uncolored region are clearly distinguishable from each other.

[0011] Furthermore, Figure 4 of Patent Documents 2 and 3 discloses an interlayer film having colored regions on both ends of the interlayer film. In this interlayer film, the thickness of the two colored regions continuously decreases toward the inside of the interlayer film in the plane direction. Therefore, the two colored regions impart a gradation pattern to the interlayer film. However, in this interlayer film, a large uncolored region with no colored regions exists in the center of the plane direction of the interlayer film. Therefore, even when this interlayer film is used as an interlayer film for roof glass, rear glass, and rear roof integrated glass, light emitted from the high-mounted stop lamp passes through the uncolored region but does not pass sufficiently through the colored region, and the two colored regions and the uncolored region between them are clearly distinguishable.

[0012] In recent years, the design of roof glass, rear glass, and integrated rear-roof glass has become more sophisticated, and there is a demand for a new design feature that allows light emitted from high-mounted stop lamps to pass through the untinted areas, and that, when the laminated glass is observed, the tinted and untinted areas appear to be integrated and have the same hue. However, with conventional interlayer films such as those described in Patent Documents 2 and 3, the tinted and untinted areas are clearly visible as separate areas, making it impossible to view the laminated glass as an integrated unit.

[0013] An object of the present invention is to provide an interlayer film for laminated glass that has excellent appearance integrity.

[0014] Another object of the present invention is to provide a laminated glass and an automobile using the above interlayer film for laminated glass. [Means for solving the problem]

[0015] According to a broad aspect of the present invention, there is provided an interlayer film for laminated glass (hereinafter sometimes simply referred to as an interlayer film), having one end and another end opposite the one end, a first colored portion and a second colored portion, the first colored portion including a portion located closer to the one end of the interlayer film than the second colored portion, the second colored portion including a portion located closer to the other end of the interlayer film than the first colored portion, the first colored portion including a first gradation portion in which the visible light transmittance increases from the one end of the interlayer film toward the other end, the first gradation portion constituting a tip of the first colored portion at the other end of the interlayer film, the second colored portion including a second gradation portion in which the visible light transmittance increases from the other end of the interlayer film toward the one end, the second gradation portion constituting a tip of the second colored portion at the one end of the interlayer film, and the interlayer film having the following Configuration A, Configuration B, or Configuration C.

[0016] Configuration A: "When the interlayer film is viewed in plan, the position of the tip of the first gradation portion is the same as the position of the tip of the second gradation portion." Configuration B: "When the interlayer film is viewed in plan, there is a region where the first gradation portion and the second gradation portion overlap." Configuration C: "When the interlayer film is viewed in a plane, the first gradation portion and the second gradation portion do not overlap, and when the interlayer film is viewed in a plane, the distance between the tip of the first gradation portion and the tip of the second gradation portion is greater than 0 cm and not greater than 30 cm."

[0017] In a specific aspect of the interlayer film according to the present invention, when the interlayer film is viewed in plan, the area of ​​the portion where at least one of the first colored portion and the second colored portion is present is 80% or more of the total area (100%) of the interlayer film.

[0018] In a specific aspect of the interlayer film according to the present invention, when laminated glass is obtained by sandwiching the interlayer film for laminated glass between two 2 mm thick green glass sheets conforming to JIS R3208, the area of ​​the laminated glass having a visible light transmittance of 60% or less accounts for 80% or more of the total area (100%) of the laminated glass.

[0019] In a specific aspect of the interlayer film according to the present invention, when laminated glass is obtained by sandwiching the interlayer film for laminated glass between two sheets of green glass each having a thickness of 2 mm conforming to JIS R3208, the visible light transmittance of the portion of the laminated glass having the highest visible light transmittance is 60% or less.

[0020] In a specific aspect of the interlayer film according to the present invention, the first colored portion extends to the one end of the interlayer film, and the second colored portion extends to the other end of the interlayer film.

[0021] In a specific aspect of the interlayer film according to the present invention, the interlayer film includes a transparent portion arranged on at least one surface side of the first colored portion in the thickness direction of the interlayer film, and a transparent portion arranged on at least one surface side of the second colored portion in the thickness direction of the interlayer film.

[0022] In a specific aspect of the interlayer film according to the present invention, the interlayer film is an interlayer film for laminated glass used in backlights or brake light indicators.

[0023] In a specific aspect of the interlayer film according to the present invention, the interlayer film is used in a rear glass, a roof glass, or a rear-roof integrated glass.

[0024] In a specific aspect of the interlayer film according to the present invention, the interlayer film has the above-mentioned configuration A: "when the interlayer film is viewed in plan, the position of the tip of the first gradation portion is the same as the position of the tip of the second gradation portion."

[0025] In a specific aspect of the interlayer film according to the present invention, the interlayer film has the above-mentioned configuration B: "when the interlayer film is viewed in plan, there is a region where the first gradation portion and the second gradation portion overlap."

[0026] In a specific aspect of the interlayer film according to the present invention, the interlayer film has the configuration C: "when the interlayer film is viewed in a plane, the first gradation portion and the second gradation portion do not overlap, and when the interlayer film is viewed in a plane, the distance between the tip of the first gradation portion and the tip of the second gradation portion is greater than 0 cm and not greater than 30 cm."

[0027] According to a broad aspect of the present invention, there is provided laminated glass comprising a first laminated glass element, a second laminated glass element, and the above-described interlayer film for laminated glass, with the interlayer film for laminated glass disposed between the first laminated glass element and the second laminated glass element.

[0028] In a specific aspect of the laminated glass according to the present invention, the area of ​​the laminated glass having a visible light transmittance of 60% or less is 80% or more of the total area (100%) of the laminated glass.

[0029] In a specific aspect of the laminated glass according to the present invention, the visible light transmittance of the portion of the entire laminated glass having the maximum visible light transmittance is 60% or less.

[0030] According to a broad aspect of the present invention, there is provided an automobile comprising an automobile body and laminated glass as a window glass of the automobile, the laminated glass comprising a first laminated glass member, a second laminated glass member, and the above-mentioned interlayer film for laminated glass, with the interlayer film for laminated glass disposed between the first laminated glass member and the second laminated glass member.

[0031] In a specific aspect of the automobile of the present invention, the automobile is equipped with a backlight or a brake light, and when the interlayer film has the configuration A, the portion where the tip of the first gradation portion and the tip of the second gradation portion are positioned is the display portion of the backlight or the brake light; when the interlayer film has the configuration B, the area where the first gradation portion and the second gradation portion overlap is the display portion of the backlight or the brake light; and when the interlayer film has the configuration C, the portion between the tip of the first gradation portion and the tip of the second gradation portion is the display portion of the backlight or the brake light. [Effects of the Invention]

[0032] The interlayer film for laminated glass according to the present invention has one end and another end opposite the one end. The interlayer film for laminated glass according to the present invention has a first colored portion and a second colored portion, the first colored portion including a portion located closer to the one end of the interlayer film than the second colored portion, and the second colored portion including a portion located closer to the other end of the interlayer film than the first colored portion. In the interlayer film for laminated glass according to the present invention, the first colored portion has a first gradation portion in which the visible light transmittance increases from the one end of the interlayer film to the other end, and the first gradation portion constitutes an end of the first colored portion at the other end of the interlayer film. In the interlayer film for laminated glass according to the present invention, the second colored portion has a second gradation portion in which the visible light transmittance increases from the other end of the interlayer film to the one end, and the second gradation portion constitutes an end of the second colored portion at the one end of the interlayer film. The interlayer film for laminated glass according to the present invention has the above-mentioned structure A, structure B, or structure C. Because the interlayer film for laminated glass according to the present invention has the above-mentioned overall structure, it has excellent appearance integrity. [Brief explanation of the drawings]

[0033] [Figure 1]FIG. 1 is a cross-sectional view schematically illustrating an interlayer film for laminated glass and laminated glass according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view schematically showing an interlayer film for laminated glass and laminated glass according to a second embodiment of the present invention. [Figure 3] FIG. 3 is a cross-sectional view schematically showing an interlayer film for laminated glass and laminated glass according to a third embodiment of the present invention. [Figure 4] FIG. 4 is a cross-sectional view schematically showing an interlayer film for laminated glass and laminated glass according to a fourth embodiment of the present invention. [Figure 5] FIG. 5 is a cross-sectional view schematically showing an interlayer film for laminated glass and laminated glass according to a fifth embodiment of the present invention. [Figure 6] FIG. 6 is a cross-sectional view schematically showing an interlayer film for laminated glass and laminated glass according to a sixth embodiment of the present invention. [Figure 7] FIG. 7 is a cross-sectional view schematically showing an interlayer film for laminated glass and laminated glass according to a seventh embodiment of the present invention. [Figure 8] FIG. 8 is a cross-sectional view schematically showing an interlayer film for laminated glass and laminated glass according to an eighth embodiment of the present invention. [Figure 9] FIG. 9 is a plan view schematically showing an interlayer film for laminated glass and laminated glass according to a ninth embodiment of the present invention. [Figure 10] FIG. 10 is a perspective view schematically showing an interlayer film for laminated glass and laminated glass according to a tenth embodiment of the present invention. [Figure 11] FIG. 11 is a perspective view schematically showing a conventional laminated glass. DETAILED DESCRIPTION OF THE INVENTION

[0034] The present invention will be described in detail below.

[0035] The interlayer film for laminated glass according to the present invention (hereinafter sometimes referred to as the interlayer film) has one end and the other end opposite the one end. The one end and the other end of the interlayer film according to the present invention are opposite ends on both sides.

[0036] The interlayer film according to the present invention has a first colored portion and a second colored portion. The first colored portion includes a portion located closer to the one end of the interlayer film than the second colored portion. The second colored portion includes a portion located closer to the other end of the interlayer film than the first colored portion. The tip of the first colored portion at the one end of the interlayer film is located closer to the one end of the interlayer film than the tip of the second colored portion at the one end of the interlayer film. The tip of the second colored portion at the other end of the interlayer film is located closer to the other end of the interlayer film than the tip of the first colored portion at the other end of the interlayer film.

[0037] The first colored portion has a first gradation portion. The first gradation portion is a portion in which visible light transmittance increases from the one end side to the other end side of the interlayer film. The color tone of the first gradation portion changes due to this change in visible light transmittance. For example, in the first gradation portion, the color tone becomes lighter from the one end side to the other end side of the interlayer film. The first gradation portion constitutes the tip of the first colored portion on the other end side of the interlayer film. The tip of the portion in which visible light transmittance increases from the one end side to the other end side of the interlayer film is the tip of the first gradation portion.

[0038] The second colored portion has a second gradation portion. The second gradation portion is a portion where visible light transmittance increases from the other end side of the interlayer film toward the one end side. The color tone of the second gradation portion changes due to this change in visible light transmittance. For example, in the second gradation portion, the color tone becomes lighter from the other end side of the interlayer film toward the one end side. The second gradation portion constitutes the tip of the second colored portion at the one end side of the interlayer film. The tip of the portion where visible light transmittance increases from the other end side of the interlayer film toward the one end side is the tip of the second gradation portion.

[0039] The interlayer film according to the present invention has the above-mentioned features, as well as the following feature A, feature B, or feature C.

[0040] Configuration A: "When the interlayer film is viewed in plan, the position of the tip of the first gradation portion is the same as the position of the tip of the second gradation portion." Configuration B: "When the interlayer film is viewed in plan, there is a region where the first gradation portion and the second gradation portion overlap." Configuration C: "When the interlayer film is viewed in a plane, the first gradation portion and the second gradation portion do not overlap, and when the interlayer film is viewed in a plane, the distance between the tip of the first gradation portion and the tip of the second gradation portion is more than 0 cm and 30 cm or less."

[0041] The interlayer film according to the present invention has the above overall configuration, and therefore has excellent appearance integrity. In laminated glass using the interlayer film according to the present invention, the first and second gradation portions of the interlayer film or their vicinity have excellent appearance integrity.

[0042] In this specification, "unified appearance" means a design property in which, when the interlayer film for laminated glass is observed, the first and second gradation portions or their vicinity appear to be integrated and have the same color tone.

[0043] The interlayer film according to the present invention is used to obtain laminated glass. The interlayer film according to the present invention is an interlayer film for laminated glass suitable for laminated glass. The interlayer film according to the present invention is an interlayer film for laminated glass that can be used for laminated glass. The laminated glass can be used for automobiles, railway vehicles, aircraft, ships, buildings, etc. The interlayer film and laminated glass according to the present invention are preferably used in backlight or brake light indicators. The interlayer film and laminated glass according to the present invention are preferably used in rear glass, roof glass, or rear-roof integrated glass, and are more preferably used in rear-roof integrated glass. The interlayer film and laminated glass according to the present invention are preferably used in rear glass having a backlight or brake light indicator, roof glass having a backlight or brake light indicator, or rear-roof integrated glass having a backlight or brake light indicator.

[0044] In laminated glass using the interlayer film according to the present invention, the light from a backlight or brake light can be clearly seen by shining light on the first and second gradation portions of the interlayer film or their vicinity.

[0045] Fig. 11 is a perspective view schematically illustrating a conventional interlayer film for laminated glass and laminated glass. The interlayer film 111 shown in Fig. 11 has been formed into laminated glass 121. In the interlayer film 111, only a first colored portion 102 having a first gradation portion 102X is formed within the transparent portion 101, and no second colored portion is formed. In such laminated glass 121, one side and the other side of the first gradation portion 102X are clearly separated, resulting in poor consistency in appearance.

[0046] The first colored portion usually contains a colorant. The first gradation portion can be produced by the following methods (1) and (2). (1) A method of reducing the thickness of the first colored portion from one end of the interlayer film toward the other end. (2) A method of decreasing the concentration of the colorant from one end of the interlayer film toward the other end.

[0047] The first gradation portion is, for example, a portion where the thickness of the first colored portion decreases from the one end side to the other end side of the interlayer film, or a portion where the concentration of the colorant in the first colored portion decreases from the one end side to the other end side of the interlayer film. From the viewpoint of achieving a better gradation state, the first gradation portion is preferably a portion where the thickness of the first colored portion decreases from the one end side to the other end side of the interlayer film.

[0048] The second colored portion usually contains a colorant. The second gradation portion can be produced by the following methods (1) and (2). (1) A method of reducing the thickness of the second colored portion from the other end side of the interlayer film toward the one end side. (2) A method of decreasing the concentration of the colorant from the other end side of the interlayer film toward the one end side.

[0049] The second gradation portion is, for example, a portion where the thickness of the second colored portion decreases from the other end side toward the one end side of the interlayer film, or a portion where the concentration of the colorant in the second colored portion decreases from the other end side toward the one end side of the interlayer film. From the viewpoint of achieving a better gradation state, the second gradation portion is preferably a portion where the thickness of the second colored portion decreases from the other end side toward the one end side of the interlayer film.

[0050] The interlayer film according to the present invention may have a transparent portion.

[0051] Whether or not a part is a transparent part can be determined, for example, as follows. When a laminated glass is obtained by sandwiching a transparent part having a thickness of 800 μm between two sheets of green glass having a thickness of 2 mm according to JIS R3208, if the visible light transmittance of the laminated glass exceeds 60%, the part is determined to be a transparent part. The transparent part may or may not contain a colorant. Note that, for example, when the thickness of the transparent part of the interlayer film is less than 800 μm, a transparent part for measuring the visible light transmittance may be separately prepared. When the thickness of the transparent part of the interlayer film is more than 800 μm, the transparent part may be cut to obtain a transparent part for measuring the visible light transmittance.

[0052] From the viewpoint of suppressing deterioration in color tone, it is preferable that the interlayer film has a transparent portion, and it is preferable that the transparent portion is arranged on at least one surface side of the first colored portion in the thickness direction of the interlayer film. From the viewpoint of suppressing deterioration in color tone, it is preferable that the transparent portion is arranged on both surface sides of the first colored portion in the thickness direction of the interlayer film. From the viewpoint of suppressing deterioration in color tone, it is preferable that the first colored portion is embedded in the transparent portion. From the viewpoint of suppressing deterioration in color tone, it is preferable that the first colored portion is arranged between the transparent portions.

[0053] From the viewpoint of suppressing deterioration in color tone, it is preferable that the interlayer film has a transparent portion, and it is preferable that the transparent portion is arranged on at least one surface side of the second colored portion in the thickness direction of the interlayer film. From the viewpoint of suppressing deterioration in color tone, it is preferable that the transparent portion is arranged on both surface sides of the second colored portion in the thickness direction of the interlayer film. From the viewpoint of suppressing deterioration in color tone, it is preferable that the second colored portion is embedded in the transparent portion. From the viewpoint of suppressing deterioration in color tone, it is preferable that the second colored portion is arranged between the transparent portions.

[0054] The transparent portion disposed on at least one surface side of the first colored portion and the transparent portion disposed on at least one surface side of the second colored portion may be the same or different. The transparent portion disposed on at least one surface side of the first colored portion and the transparent portion disposed on at least one surface side of the second colored portion may or may not be continuous.

[0055] The interlayer film has the above-mentioned configuration A, the above-mentioned configuration B, or the above-mentioned configuration C. The interlayer film may have the above-mentioned configuration A or the above-mentioned configuration B, or the above-mentioned configuration A or the above-mentioned configuration C, or the above-mentioned configuration B or the above-mentioned configuration C. The interlayer film may have the above-mentioned configuration A, or the above-mentioned configuration B, or the above-mentioned configuration C.

[0056] In the above-mentioned configuration A, when the interlayer film is viewed from above, the tip of the first gradation portion and the tip of the second gradation portion are positioned at the same position. The tip of the first gradation portion and the tip of the second gradation portion do not have to be in contact. It is preferable that the tip of the first gradation portion and the tip of the second gradation portion are in contact. In the portion where the tip of the first gradation portion and the tip of the second gradation portion are positioned at the same position, there may or may not be a boundary line, or there may or may not be a boundary surface. The first colored portion and the second colored portion may be formed integrally. The tip of the first gradation portion and the tip of the second gradation portion may be formed integrally. The tip of the first gradation portion and the tip of the second gradation portion may be in surface contact or point contact.

[0057] In the above-mentioned configuration A, the first and second gradation portions can be visually recognized as a single unit. This results in excellent appearance integrity for the interlayer film and the laminated glass. When the interlayer film is viewed from above, a gradation pattern can be visually recognized in which the color tone becomes darker on both sides, centered on the point where the tip of the first gradation portion and the tip of the second gradation portion are positioned.

[0058] In the above-described configuration B, when the interlayer film is viewed from above, there is a region where the first gradation portion and the second gradation portion overlap. The first gradation portion includes a portion located closer to the other end of the interlayer film than the tip of the second gradation portion. The second gradation portion includes a portion located closer to the one end of the interlayer film than the tip of the first gradation portion. The tip of the first gradation portion at the other end of the interlayer film is located closer to the other end of the interlayer film than the tip of the second gradation portion at the one end of the interlayer film. The tip of the second gradation portion at the one end of the interlayer film is located closer to the one end of the interlayer film than the tip of the first gradation portion at the other end of the interlayer film.

[0059] In the above-mentioned configuration B, in the region where the first gradation portion and the second gradation portion overlap, the first gradation portion and the second gradation portion may or may not be in surface contact with each other in the thickness direction of the interlayer film. A transparent portion may be disposed between the first gradation portion and the second gradation portion.

[0060] The overlapping distance between the first gradation portion and the second gradation portion is preferably 30 cm or less, more preferably 20 cm or less, even more preferably 15 cm or less, particularly preferably 10 cm or less, and most preferably 5 cm or less.

[0061] The overlapping distance is preferably a distance in a direction connecting the one end and the other end of the intermediate film.

[0062] In the above-mentioned configuration B, it is preferable that the first colored portion and the second colored portion are present at different depths in the thickness direction of the interlayer film, thereby enabling the laminated glass to exhibit a design in which the color tone changes depending on the direction and angle from which the laminated glass is observed.

[0063] From the viewpoint of further enhancing the unity of appearance, in the above-mentioned configuration B, it is preferable that there is further an area where the first gradation portion and the second gradation portion do not overlap when the interlayer film is viewed from above. It is preferable that the first gradation portion includes a portion located closer to the one end of the interlayer film than the second gradation portion. It is preferable that the second gradation portion includes a portion located closer to the other end of the interlayer film than the first gradation portion. It is preferable that the tip of the first gradation portion at the one end of the interlayer film is located closer to the one end of the interlayer film than the tip of the second gradation portion at the one end of the interlayer film. It is preferable that the tip of the second gradation portion at the other end of the interlayer film is located closer to the other end of the interlayer film than the tip of the first gradation portion at the other end of the interlayer film.

[0064] In the above-mentioned configuration B, the first and second gradation portions can be visually recognized as a single unit, which results in excellent appearance unity of the interlayer film and the laminated glass.

[0065] In the above-described configuration C, the first gradation portion and the second gradation portion do not overlap when the interlayer film is viewed in a plan view, and the distance between the tip of the first gradation portion and the tip of the second gradation portion (hereinafter sometimes referred to as distance D) when the interlayer film is viewed in a plan view is greater than 0 cm and less than 30 cm. The first gradation portion does not include a portion located closer to the other end of the interlayer film than the second gradation portion. The second gradation portion does not include a portion located closer to the one end of the interlayer film than the first gradation portion. The tip of the first gradation portion at the other end of the interlayer film is located closer to the one end of the interlayer film than the tip of the second gradation portion at the one end of the interlayer film. The tip of the second gradation portion at the one end of the interlayer film is located closer to the other end of the interlayer film than the tip of the first gradation portion at the other end of the interlayer film.

[0066] In the above-mentioned configuration C, the first colored portion and the second colored portion may be present at the same depth position or at different depth positions in the thickness direction of the interlayer film. From the viewpoint of realizing a design in which the color tone varies depending on the direction and angle at which the laminated glass is observed, in the above-mentioned configuration C, it is preferable that the first colored portion and the second colored portion be present at different depth positions in the thickness direction of the interlayer film. From the viewpoint of realizing a design in which the color tone is uniform regardless of the direction and angle at which the laminated glass is observed, it is preferable that the first colored portion and the second colored portion be present at the same depth position in the thickness direction of the interlayer film.

[0067] In the above-mentioned configuration C, the distance D is relatively small. Therefore, the first and second gradation portions can be visually recognized as a substantially integrated part in the interlayer film and the laminated glass. This results in excellent external integrity of the interlayer film and the laminated glass. The smaller the distance D, the more integrated the first and second gradation portions can be visually recognized.

[0068] From the viewpoint of further improving the unity of the appearance and of making the light of the backlight or brake light visible in a better gradation state, the distance D is preferably 20 cm or less, more preferably 15 cm or less, even more preferably 10 cm or less, and particularly preferably 5 cm or less.

[0069] The distance D is determined as the distance in the plane direction of the interlayer film (see FIGS. 3, 7, and 8 described later).

[0070] From the viewpoint of further improving the integrity of the appearance, when the interlayer film is viewed from above, the planar area of ​​the portion where at least one of the first colored portion and the second colored portion is present is preferably 80% or more, more preferably 90% or more, even more preferably 92% or more, even more preferably 94% or more, and even more preferably 95% or more of the total planar area (100%) of the interlayer film. The planar area of ​​the portion where at least one of the first colored portion and the second colored portion is present is 100% or less of the total planar area (100%) of the interlayer film. The planar area of ​​the portion where at least one of the first colored portion and the second colored portion is present may be 100% of the total planar area (100%) of the interlayer film.

[0071] When laminated glass is obtained by sandwiching an interlayer film for laminated glass between two 2 mm thick green glass sheets conforming to JIS R3208, the resulting laminated glass is referred to as laminated glass L1. In laminated glass L1, 2 mm thick green glass is used. In this case, the green glass is green glass for measuring visible light transmittance. Furthermore, laminated glass actually obtained using the interlayer film for laminated glass according to the present invention is referred to as laminated glass L2. In laminated glass L2, 2 mm thick green glass may or may not be used.

[0072] From the viewpoint of further improving the integrity of the appearance, the plane area of ​​the portions having a visible light transmittance of 60% or less out of the total plane area (100%) of the laminated glasses L1 and L2 is preferably 80% or more, more preferably 90% or more, even more preferably 92% or more, even more preferably 94% or more, and even more preferably 95% or more. The plane area of ​​the portions having a visible light transmittance of 60% or less out of the total plane area (100%) of the laminated glasses L1 and L2 may be 100% or less.

[0073] From the viewpoint of further improving the integrity of the appearance, the plane area of ​​the portions having a visible light transmittance of 50% or less out of the total plane area (100%) of the laminated glasses L1 and L2 is preferably 80% or more, more preferably 90% or more, even more preferably 92% or more, even more preferably 94% or more, and even more preferably 95% or more. The plane area of ​​the portions having a visible light transmittance of 50% or less out of the total plane area (100%) of the laminated glasses L1 and L2 may be 100% or less.

[0074] From the viewpoint of further improving the integrity of the appearance, the plane area of ​​the portions having a visible light transmittance of 40% or less out of 100% of the total plane area of ​​the laminated glasses L1 and L2 is preferably 80% or more, more preferably 90% or more, even more preferably 92% or more, even more preferably 94% or more, and even more preferably 95% or more. The plane area of ​​the portions having a visible light transmittance of 40% or less out of 100% of the total plane area of ​​the laminated glasses L1 and L2 may be 100%.

[0075] From the viewpoint of further improving the integrity of the appearance, the visible light transmittance of the portion of the laminated glass L1 and the laminated glass L2 that has the maximum visible light transmittance is preferably 60% or less, more preferably 50% or less, and even more preferably 40% or less.

[0076] The visible light transmittance of the laminated glass L1, the laminated glass L2, and the laminated glass according to the present invention can be determined by measuring the transmittance of the laminated glass at wavelengths of 380 nm to 780 nm using a spectrophotometer (Hitachi High-Technologies Corporation's "U-4100") in accordance with JIS R3106:1998 or JIS R3212:1998.

[0077] The laminated glass according to the present invention comprises a first laminated glass member, a second laminated glass member, and the interlayer film, with the interlayer film for laminated glass being disposed between the first laminated glass member and the second laminated glass member.

[0078] The automobile according to the present invention comprises an automobile body and a laminated glass as a window glass of the automobile. The laminated glass comprises a first laminated glass member, a second laminated glass member, and the interlayer film. The interlayer film is disposed between the first laminated glass member and the second laminated glass member.

[0079] Specific embodiments of the present invention will be described below with reference to the drawings. The sizes and dimensions of the interlayer film and laminated glass in Figures 1 to 8 have been appropriately modified from their actual sizes and shapes for the sake of convenience. Different parts in Figures 1 to 8 are interchangeable. In Figures 1 to 8, parts that may have similar configurations may be designated by the same reference numerals.

[0080] FIG. 1 is a cross-sectional view schematically illustrating an interlayer film for laminated glass and laminated glass according to a first embodiment of the present invention.

[0081] The intermediate film 11 shown in FIG.

[0082] The intermediate film 11 has one end 11a and the other end 11b opposite to the one end 11a.

[0083] The interlayer film 11 has a transparent portion 1, a first colored portion 2, and a second colored portion 3. The first colored portion 2 includes a portion located closer to one end 11a of the interlayer film 11 than the second colored portion 3. The second colored portion 3 includes a portion located closer to the other end 11b of the interlayer film 11 than the first colored portion 2. The first colored portion 2 reaches one end 11a of the interlayer film 11. The second colored portion 3 reaches the other end 11b of the interlayer film 11. In the thickness direction of the interlayer film 11, the first colored portion 2 and the second colored portion 3 are present at the same depth position.

[0084] Transparent portions 1 are arranged on both surface sides of the first colored portion 2. The first colored portion 2 is embedded in the transparent portion 1. Transparent portions 1 are arranged on both surface sides of the second colored portion 3. The second colored portion 3 is embedded in the transparent portion 1. The transparent portions 1 are surface layers of the interlayer film 11. The first colored portion 2 and the second colored portion 3 are each an intermediate layer of the interlayer film 11.

[0085] The first colored portion 2 has a first gradation portion 2X in which the visible light transmittance increases from one end 11a of the interlayer 11 to the other end 11b. The first gradation portion 2X forms the tip of the first colored portion 2 on the other end 11b of the interlayer 11. The first colored portion 2 has a first non-gradation portion 2Y on the one end 11a of the interlayer 11. The first colored portion 2 reaches the one end 11a of the interlayer 11 at the first non-gradation portion 2Y. The first gradation portion 2X is a portion in which the thickness of the first colored portion 2 decreases from one end 11a of the interlayer 11 to the other end 11b. The first non-gradation portion 2Y is a portion in which the thickness of the first colored portion 2 is uniform.

[0086] The second colored portion 3 has a second gradation portion 3X in which the visible light transmittance increases from the other end 11b of the interlayer 11 toward the one end 11a. The second gradation portion 3X forms the tip of the second colored portion 3 at the one end 11a of the interlayer 11. The second colored portion 3 has a second non-gradation portion 3Y at the other end 11b of the interlayer 11. The second colored portion 3 reaches the other end 11b of the interlayer 11 at the second non-gradation portion 3Y. The second gradation portion 3X is a portion in which the thickness of the second colored portion 3 decreases from the other end 11b of the interlayer 11 toward the one end 11a. The second non-gradation portion 3Y is a portion in which the thickness of the second colored portion 3 is uniform.

[0087] When the interlayer film 11 is viewed from above (in the direction of arrow P in FIG. 1), the tip 2Xa of the first gradation portion 2X and the tip 3Xa of the second gradation portion 3X are positioned at the same position. The tip 2Xa of the first gradation portion 2X and the tip 3Xa of the second gradation portion 3X are in contact with each other.

[0088] In FIG. 1 , the interlayer film 11 is shown in a state where it has been made into a laminated glass 31. The laminated glass 31 includes a first laminated glass member 21, a second laminated glass member 22, and the interlayer film 11. The interlayer film 11 is disposed between the first laminated glass member 21 and the second laminated glass member 22. The first laminated glass member 21 is disposed and laminated on a first surface side of the interlayer film 11. The second laminated glass member 22 is disposed and laminated on a second surface side of the interlayer film 11 opposite the first surface.

[0089] The interlayer film 11 and the laminated glass 31 have a display portion for the backlight or brake light 51. The portion where the tip 2Xa of the first gradation portion 2X and the tip 3Xa of the second gradation portion 3X are positioned is the display portion for the backlight or brake light 51. Light emitted from the backlight or brake light 51 can be seen in a gradation state in and near the portion where the tip 2Xa of the first gradation portion 2X and the tip 3Xa of the second gradation portion 3X are positioned.

[0090] FIG. 2 is a cross-sectional view schematically showing an interlayer film for laminated glass and laminated glass according to a second embodiment of the present invention.

[0091] The intermediate film 11A shown in FIG.

[0092] The intermediate film 11A has one end 11Aa and the other end 11Ab opposite to the one end 11Aa.

[0093] The interlayer film 11A has a transparent portion 1A, a first colored portion 2A, and a second colored portion 3A. The first colored portion 2A includes a portion located closer to one end 11Aa of the interlayer film 11A than the second colored portion 3A. The second colored portion 3A includes a portion located closer to the other end 11Ab of the interlayer film 11A than the first colored portion 2A. The first colored portion 2A reaches one end 11Aa of the interlayer film 11A. The second colored portion 3A reaches the other end 11Ab of the interlayer film 11A. In the thickness direction of the interlayer film 11A, the first colored portion 2A and the second colored portion 3A are present at different depth positions.

[0094] Transparent portions 1A are arranged on both surface sides of the first colored portion 2A. The first colored portion 2A is embedded in the transparent portion 1A. Transparent portions 1A are arranged on both surface sides of the second colored portion 3A. The second colored portion 3A is embedded in the transparent portion 1A. The transparent portions 1A are surface layers of the interlayer film 11A. The first colored portion 2A and the second colored portion 3A are each intermediate layers of the interlayer film 11A.

[0095] The first colored portion 2A has a first gradation portion 2AX in which the visible light transmittance increases from one end 11Aa of the intermediate film 11A toward the other end 11Ab. The first gradation portion 2AX forms the tip of the first colored portion 2A on the other end 11Ab of the intermediate film 11A. The first colored portion 2A has a first non-gradation portion 2AY on the one end 11Aa of the intermediate film 11A. The first colored portion 2A reaches the one end 11Aa of the intermediate film 11A at the first non-gradation portion 2AY. The first gradation portion 2AX is a portion in which the thickness of the first colored portion 2A decreases from one end 11Aa of the intermediate film 11A toward the other end 11Ab. The first non-gradation portion 2AY is a portion in which the thickness of the first colored portion 2A is uniform.

[0096] The second colored portion 3A has a second gradation portion 3AX in which the visible light transmittance increases from the other end 11Ab of the intermediate film 11A toward the one end 11Aa. The second gradation portion 3AX forms the tip of the second colored portion 3A on the one end 11Aa side of the intermediate film 11A. The second colored portion 3A has a second non-gradation portion 3AY on the other end 11Ab side of the intermediate film 11A. The second colored portion 3A reaches the other end 11Ab of the intermediate film 11A at the second non-gradation portion 3AY. The second gradation portion 3AX is a portion of the second colored portion 3A where the thickness decreases from the other end 11Ab of the intermediate film 11A toward the one end 11Aa. The second non-gradation portion 3AY is a portion of the second colored portion 3A where the thickness is uniform.

[0097] When the intermediate film 11A is viewed from above (in the direction of arrow P in FIG. 2), there is a region where the first gradation portion 2AX and the second gradation portion 3AX overlap.

[0098] In FIG. 2, the interlayer film 11A is shown in a state where it has been made into a laminated glass 31A. The laminated glass 31A includes a first laminated glass member 21, a second laminated glass member 22, and the interlayer film 11A. The interlayer film 11A is disposed between the first laminated glass member 21 and the second laminated glass member 22. The first laminated glass member 21 is disposed and laminated on a first surface side of the interlayer film 11A. The second laminated glass member 22 is disposed and laminated on a second surface side opposite the first surface of the interlayer film 11A.

[0099] The interlayer film 11A and the laminated glass 31A have a display portion for the backlight or brake light 51. The overlapping portion of the first gradation portion 2AX and the second gradation portion 3AX is the display portion for the backlight or brake light 51. Light emitted from the backlight or brake light 51 can be seen in a gradation state at and near the overlapping portion of the first gradation portion 2AX and the second gradation portion 3AX.

[0100] FIG. 3 is a cross-sectional view schematically showing an interlayer film for laminated glass and laminated glass according to a third embodiment of the present invention.

[0101] The intermediate film 11B shown in FIG.

[0102] The intermediate film 11B has one end 11Ba and the other end 11Bb opposite to the one end 11Ba.

[0103] The intermediate film 11B has a transparent portion 1B, a first colored portion 2B, and a second colored portion 3B. The first colored portion 2B includes a portion located closer to one end 11Ba of the intermediate film 11B than the second colored portion 3B. The second colored portion 3B includes a portion located closer to the other end 11Bb of the intermediate film 11B than the first colored portion 2B. The first colored portion 2B reaches one end 11Ba of the intermediate film 11B. The second colored portion 3B reaches the other end 11Bb of the intermediate film 11B. In the thickness direction of the intermediate film 11B, the first colored portion 2B and the second colored portion 3B are present at the same depth position.

[0104] Transparent portions 1B are arranged on both surface sides of the first colored portion 2B. The first colored portion 2B is embedded in the transparent portion 1B. Transparent portions 1B are arranged on both surface sides of the second colored portion 3B. The second colored portion 3B is embedded in the transparent portion 1B. The transparent portions 1B are surface layers of the interlayer 11B. The first colored portion 2B and the second colored portion 3B are each intermediate layers of the interlayer 11B.

[0105] The first colored portion 2B has a first gradation portion 2BX in which the visible light transmittance increases from one end 11Ba of the intermediate film 11B toward the other end 11Bb. The first gradation portion 2BX forms the tip of the first colored portion 2B on the other end 11Bb of the intermediate film 11B. The first colored portion 2B has a first non-gradation portion 2BY on the one end 11Ba of the intermediate film 11B. The first colored portion 2B reaches the one end 11Ba of the intermediate film 11B at the first non-gradation portion 2BY. The first gradation portion 2BX is a portion in which the thickness of the first colored portion 2B decreases from one end 11Ba of the intermediate film 11B toward the other end 11Bb. The first non-gradation portion 2BY is a portion in which the thickness of the first colored portion 2B is uniform.

[0106] The second colored portion 3B has a second gradation portion 3BX in which the visible light transmittance increases from the other end 11Bb of the interlayer 11B toward the one end 11Ba. The second gradation portion 3BX forms the tip of the second colored portion 3B on the one end 11Ba side of the interlayer 11B. The second colored portion 3B has a second non-gradation portion 3BY on the other end 11Bb side of the interlayer 11B. The second colored portion 3B reaches the other end 11Bb of the interlayer 11B at the second non-gradation portion 3BY. The second gradation portion 3BX is a portion of the second colored portion 3B where the thickness decreases from the other end 11Bb of the interlayer 11B toward the one end 11Ba. The second non-gradation portion 3BY is a portion of the second colored portion 3B where the thickness is uniform.

[0107] When intermediate film 11B is viewed in a plan view (in the direction of arrow P in FIG. 3), tip 2BXa of first gradation portion 2BX and tip 3BXa of second gradation portion 3BX do not overlap. When intermediate film 11B is viewed in a plan view, distance D between the tip of first gradation portion 2BX and the tip of second gradation portion 3BX is 30 cm or less.

[0108] In FIG. 3, the interlayer film 11B is shown in a state where it has been made into a laminated glass 31B. The laminated glass 31B includes a first laminated glass member 21, a second laminated glass member 22, and an interlayer film 11B. The interlayer film 11B is disposed between the first laminated glass member 21 and the second laminated glass member 22. The first laminated glass member 21 is disposed and laminated on a first surface side of the interlayer film 11B. The second laminated glass member 22 is disposed and laminated on a second surface side opposite the first surface of the interlayer film 11B.

[0109] The interlayer film 11B and the laminated glass 31B have a display portion for the backlight or brake light 51. The portion between the tip 2BXa of the first gradation portion 2BX and the tip 3BXa of the second gradation portion 3BX is the display portion for the backlight or brake light 51. Light emitted from the backlight or brake light 51 can be seen in a gradation state in the portion between the tip 2BXa of the first gradation portion 2BX and the tip 3BXa of the second gradation portion 3BX (the portion where the distance D is narrow) and in the vicinity thereof.

[0110] FIG. 4 is a cross-sectional view schematically showing an interlayer film for laminated glass and laminated glass according to a fourth embodiment of the present invention.

[0111] The intermediate film 11C shown in FIG.

[0112] Interlayer 11C is shown in laminated glass 31C.

[0113] The intermediate film 11C has one end 11Ca and the other end 11Cb opposite to the one end 11Ca.

[0114] The intermediate film 11C has a transparent portion 1C, a first colored portion 2C, and a second colored portion 3C.

[0115] The entire first colored portion 2C is a first gradation portion in which the visible light transmittance increases from one end 11Ca of the intermediate film 11C toward the other end 11Cb. The first gradation portion constitutes the tip of the first colored portion 2C on the other end 11Cb of the intermediate film 11C. The first colored portion 2C does not have an ungraded portion on the one end 11Ca of the intermediate film 11C. The first colored portion 2C reaches the one end 11Ca of the intermediate film 11C via the gradation portion. The thickness of the first colored portion 2C (first gradation portion) decreases from the one end 11Ca of the intermediate film 11C toward the other end 11Cb.

[0116] The entire second colored portion 3C is a second gradation portion in which the visible light transmittance increases from the other end 11Cb of the interlayer 11C toward the one end 11Ca. The second gradation portion constitutes the tip of the second colored portion 3C on the one end 11Ca side of the interlayer 11C. The second colored portion 3C does not have an ungraded portion on the other end 11Cb side of the interlayer 11C. The second colored portion 3C reaches the other end 11Cb of the interlayer 11C via the gradation portion. The thickness of the second colored portion 3C (second gradation portion) decreases from the other end 11Cb of the interlayer 11C toward the one end 11Ca.

[0117] When the intermediate film 11C is viewed from above, the position of the tip 2Ca of the first colored portion 2C (first gradation portion) and the position of the tip 3Ca of the second colored portion 3C (second gradation portion) are the same.

[0118] The entire colored portion may be a gradation portion, as in the interlayer film 11C. In the interlayer films having the above-mentioned configurations B and C, the entire colored portion may be a gradation portion.

[0119] FIG. 5 is a cross-sectional view schematically showing an interlayer film for laminated glass and laminated glass according to a fifth embodiment of the present invention.

[0120] The intermediate film 11D shown in FIG.

[0121] Interlayer 11D is shown in a state where it has been laminated into glass 31D.

[0122] The intermediate film 11D has one end 11Da and the other end 11Db opposite to the one end 11Da.

[0123] The intermediate film 11D has a transparent portion 1D, a first colored portion 2D, and a second colored portion 3D.

[0124] A transparent portion 1D is arranged on only one surface side of the first colored portion 2D. The first colored portion 2D is not embedded in the transparent portion 1D. A transparent portion 1D is arranged on only one surface side of the second colored portion 3D. The second colored portion 3D is not embedded in the transparent portion 1D. The transparent portion 1D is a surface layer of the interlayer 11D. The first colored portion 2D and the second colored portion 3D are each a surface layer of the interlayer 11D.

[0125] The first colored portion 2D has a first gradation portion 2DX. The first gradation portion 2DX constitutes the tip of the first colored portion 2D on the other end 11Db side of the interlayer 11D. The first colored portion 2D has a first non-gradation portion 2DY on the one end 11Da side of the interlayer 11D. The first colored portion 2D reaches the one end 11Da of the interlayer 11D at the first non-gradation portion 2DY.

[0126] The second colored portion 3D has a second gradation portion 3DX. The second gradation portion 3DX constitutes the tip of the second colored portion 3D on the one end 11Da side of the interlayer 11D. The second colored portion 3D has a second non-gradation portion 3DY on the other end 11Db side of the interlayer 11D. The second colored portion 3D reaches the other end 11Db of the interlayer 11D at the second non-gradation portion 3DY.

[0127] When intermediate film 11D is viewed from above, the position of tip 2DXa of first gradation portion 2DX and the position of tip 3DXa of second gradation portion 3DX are the same.

[0128] As in interlayer film 11D, the colored portion does not have to be embedded in the transparent portion, and the colored portion may be a surface layer. In the interlayer films having the above-mentioned configurations B and C, the colored portion does not have to be embedded in the transparent portion, and the colored portion may be a surface layer.

[0129] FIG. 6 is a cross-sectional view schematically showing an interlayer film for laminated glass and laminated glass according to a sixth embodiment of the present invention.

[0130] The intermediate film 11E shown in FIG.

[0131] The interlayer 11E is shown in a state where it has been laminated into a glass 31E.

[0132] The intermediate film 11E has one end 11Ea and the other end 11Eb opposite to the one end 11Ea.

[0133] In Fig. 6, colorant E is shown schematically, and the amount of colorant E is also shown schematically. Note that when the colorant is in particulate form, the actual size of the colorant is much smaller than the size shown in Fig. 6. Note that the colorant is not shown in Figs. 1 to 5, 7, and 8.

[0134] The intermediate film 11E has a transparent portion 1E, a first colored portion 2E, and a second colored portion 3E.

[0135] The first colored portion 2E has a first gradation portion 2EX. The first gradation portion 2EX constitutes the tip of the first colored portion 2E on the other end 11Eb side of the intermediate film 11E. The first colored portion 2E has a first non-gradation portion 2EY on the one end 11Ea side of the intermediate film 11E. The first colored portion 2E reaches the one end 11Ea of the intermediate film 11E at the first non-gradation portion 2EY. The first gradation portion 2EX is a portion where the concentration of the colorant decreases from the one end 11Ea side of the intermediate film 11E toward the other end 11Eb side. The first non-gradation portion 2EY is a portion where the concentration of the colorant is uniform.

[0136] The second colored portion 3E has a second gradation portion 3EX. The second gradation portion 3EX constitutes the tip of the second colored portion 3E on the one end 11Ea side of the intermediate film 11E. The second colored portion 3E has a second non-gradation portion 3EY on the other end 11Eb side of the intermediate film 11E. The second colored portion 3E reaches the other end 11Eb of the intermediate film 11E at the second non-gradation portion 3EY. The second gradation portion 3EX is a portion where the concentration of the colorant decreases from the other end 11Eb side of the intermediate film 11E toward the one end 11Ea side. The second non-gradation portion 3EY is a portion where the concentration of the colorant is uniform.

[0137] When the intermediate film 11E is viewed from above, the position of the tip 2EXa of the first gradation portion 2EX and the position of the tip 3EXa of the second gradation portion 3EX are the same.

[0138] As in the case of interlayer film 11E, the gradation portion may be formed by varying the concentration of a colorant. In the interlayer films having the above-described configurations B and C, the gradation portion may also be formed by varying the concentration of a colorant.

[0139] FIG. 7 is a cross-sectional view schematically showing an interlayer film for laminated glass and laminated glass according to a seventh embodiment of the present invention.

[0140] The intermediate film 11F shown in FIG.

[0141] Interlayer 11F is shown in a laminated glass 31F.

[0142] The intermediate film 11F has one end 11Fa and the other end 11Fb opposite to the one end 11Fa.

[0143] The intermediate film 11F has a transparent portion 1F, a first colored portion 2F, a second colored portion 3F, and a third colored portion 4F.

[0144] The first colored portion 2F has a first gradation portion 2FX. The first gradation portion 2FX constitutes the tip of the first colored portion 2F on the other end 11Fb side of the intermediate film 11F. The first colored portion 2F has a first non-gradation portion 2FY on the one end 11Fa side of the intermediate film 11F. The first colored portion 2F reaches the one end 11Fa of the intermediate film 11F at the first non-gradation portion 2FY.

[0145] The second colored portion 3F has a second gradation portion 3FX. The second gradation portion 3FX forms the tip of the second colored portion 3F on the one end 11Fa side of the intermediate film 11F. The second colored portion 3F has a second non-gradation portion 3FY on the other end 11Fb side of the intermediate film 11F. The second colored portion 3F reaches the other end 11Fb of the intermediate film 11F at the second non-gradation portion 3FY.

[0146] The third colored portion 4F is located between the tip of the first gradation portion 2FX and the tip of the second gradation portion 3FX. The third colored portion 4F is a non-gradation portion. Because the third colored portion 4F is a non-gradation portion, it is not included in the first gradation portion 2FX that forms the tip of the first colored portion 2F. Because the third colored portion 4F is a non-gradation portion, it is not included in the second gradation portion 3FX that forms the tip of the second colored portion 3F.

[0147] When intermediate film 11F is viewed in a plan view, tip 2FXa of first gradation portion 2FX does not overlap tip 3FXa of second gradation portion 3FX. When intermediate film 11F is viewed in a plan view, distance D between the tip of first gradation portion 2FX and the tip of second gradation portion 3FX is 30 cm or less.

[0148] Like the intermediate film 11F, a colored portion may be disposed between the first and second gradation portions.

[0149] FIG. 8 is a cross-sectional view schematically showing an interlayer film for laminated glass and laminated glass according to an eighth embodiment of the present invention.

[0150] The intermediate film 11G shown in FIG.

[0151] The interlayer 11G is shown in a laminated glass 31G.

[0152] The intermediate film 11G has one end 11Ga and the other end 11Gb opposite to the one end 11Ga.

[0153] The intermediate film 11G has a transparent portion 1G, a first colored portion 2G, and a second colored portion 3G. In the thickness direction of the intermediate film 11G, the first colored portion 2G and the second colored portion 3G are present at different depth positions.

[0154] The first colored portion 2G has a first gradation portion 2GX. The first gradation portion 2GX forms the tip of the first colored portion 2G on the other end 11Gb side of the intermediate film 11G. The first colored portion 2G has a first non-gradation portion 2GY on the one end 11Ga side of the intermediate film 11G. The first colored portion 2G reaches the one end 11Ga of the intermediate film 11G at the first non-gradation portion 2GY.

[0155] The second colored portion 3G has a second gradation portion 3GX. ​​The second gradation portion 3GX forms the tip of the second colored portion 3G on the one end 11Ga side of the intermediate film 11G. The second colored portion 3G has a second non-gradation portion 3GY on the other end 11Gb side of the intermediate film 11G. The second colored portion 3G reaches the other end 11Gb of the intermediate film 11G at the second non-gradation portion 3GY.

[0156] When viewed in a plane, the tip 2GXa of the first gradation portion 2GX and the tip 3GXa of the second gradation portion 3GX do not overlap. When viewed in a plane, the distance D between the tip of the first gradation portion 2GX and the tip of the second gradation portion 3GX is 30 cm or less.

[0157] As in interlayer film 11G, the first and second gradation portions may be located at different depths in the thickness direction of the interlayer film. In the interlayer film having configuration A, the first and second gradation portions may also be located at different depths as long as the tip of the first gradation portion and the tip of the second gradation portion are located at the same position when the interlayer film is viewed in plan.

[0158] Fig. 9 is a plan view schematically showing a laminated glass including an interlayer film for laminated glass according to a ninth embodiment of the present invention, and Fig. 10 is a perspective view schematically showing a laminated glass including an interlayer film for laminated glass according to a tenth embodiment of the present invention.

[0159] In Figures 9 and 10, the interlayer film is shown in a laminated glass state. The areas where the color tone becomes lighter are the first and second gradation areas. The first and second gradation areas are arranged in a line. The first and second gradation areas can be used as indicators for backlights or brake lights. The laminated glass shown in Figure 10 is a rear roof integrated glass.

[0160] Other details of each component constituting the laminated glass according to the present invention will be described below.

[0161] (First and second laminated glass members) Examples of the first and second laminated glass members include glass plates and PET (polyethylene terephthalate) films. The laminated glass includes not only laminated glass in which an interlayer film is sandwiched between two glass plates, but also laminated glass in which an interlayer film is sandwiched between a glass plate and a PET film or the like. The laminated glass is a laminate including glass plates, and preferably contains at least one glass plate. It is preferable that the first and second laminated glass members are each glass plates or PET (polyethylene terephthalate) films, and that the laminated glass includes at least one glass plate as the first and second laminated glass members. It is particularly preferable that both the first and second laminated glass members are glass plates.

[0162] Examples of the glass plate include inorganic glass and organic glass. Examples of the inorganic glass include float glass, heat-absorbing glass, heat-reflecting glass, polished glass, patterned glass, wired glass, striped glass, and green glass. The organic glass is a synthetic resin glass that replaces inorganic glass. Examples of the organic glass include polycarbonate plates and poly(meth)acrylic resin plates. Examples of the poly(meth)acrylic resin plates include polymethyl(meth)acrylate plates.

[0163] The thickness of each of the first laminated glass member and the second laminated glass member is not particularly limited, but is preferably 1 mm or more and preferably 5 mm or less. When the laminated glass member is a glass plate, the thickness of the glass plate is preferably 1 mm or more and preferably 5 mm or less. When the laminated glass member is a PET film, the thickness of the PET film is preferably 0.03 mm or more and preferably 0.5 mm or less.

[0164] The thicknesses of the first and second laminated glass members refer to average thicknesses.

[0165] (interlayer film) The thickness of the interlayer film is not particularly limited. From the viewpoint of practical use and of sufficiently increasing the penetration resistance and bending rigidity of the laminated glass, the thickness of the interlayer film is preferably 0.1 mm or more, more preferably 0.25 mm or more, and preferably 3 mm or less, more preferably 1.5 mm or less. When the thickness of the interlayer film is equal to or greater than the above lower limit, the penetration resistance and bending rigidity of the laminated glass are further improved. When the thickness of the interlayer film is equal to or less than the above upper limit, the transparency of the interlayer film is further improved.

[0166] The thickness of the interlayer film means the average thickness.

[0167] resin: The intermediate film preferably contains a resin. The transparent portion preferably contains a resin. The colored portion preferably contains a resin. Examples of the resin include a thermosetting resin and a thermoplastic resin. Only one type of the resin may be used, or two or more types may be used in combination.

[0168] Examples of the thermoplastic resin include polyvinyl acetal resin, polyester resin, ethylene-vinyl acetate copolymer resin, ethylene-acrylic acid copolymer resin, polyurethane resin, polyvinyl alcohol resin, and ionomer resin. Thermoplastic resins other than these may also be used.

[0169] Plasticizer: The interlayer preferably contains a plasticizer. The transparent portion preferably contains a plasticizer. The colored portion preferably contains a plasticizer. When the thermoplastic resin contained in the interlayer is a polyvinyl acetal resin, it is particularly preferable that the interlayer (each layer) contains a plasticizer. The plasticizer may be used alone or in combination of two or more.

[0170] Examples of the plasticizer include organic ester plasticizers such as monobasic organic acid esters and polybasic organic acid esters, and organic phosphoric acid plasticizers such as organic phosphoric acid plasticizers and organic phosphorous acid plasticizers. Organic ester plasticizers are preferred. The plasticizer is preferably a liquid plasticizer.

[0171] Examples of the monobasic organic acid ester include glycol esters obtained by reacting glycol with a monobasic organic acid. Examples of the glycol include triethylene glycol, tetraethylene glycol, and tripropylene glycol. Examples of the monobasic organic acid include butyric acid, isobutyric acid, caproic acid, 2-ethylbutyric acid, heptyl acid, n-octylic acid, 2-ethylhexyl acid, n-nonylic acid, decylic acid, and benzoic acid.

[0172] Examples of the polybasic organic acid ester include ester compounds of a polybasic organic acid and an alcohol having a linear or branched structure and having 4 to 8 carbon atoms. Examples of the polybasic organic acid include adipic acid, sebacic acid, and azelaic acid.

[0173] Examples of the organic ester plasticizer include triethylene glycol di-2-ethylpropanoate, triethylene glycol di-2-ethylbutyrate, triethylene glycol di-2-ethylhexanoate, triethylene glycol dicaprylate, triethylene glycol di-n-octanoate, triethylene glycol di-n-heptanoate, tetraethylene glycol di-n-heptanoate, dibutyl sebacate, dioctyl azelate, dibutyl carbitol adipate, ethylene glycol di-2-ethylbutyrate, 1,3-propylene glycol di-2-ethylbutyrate, 1,4-butylene glycol di-2-ethylbutyrate, and diethylene glycol di-2-ethylbutylene. Examples of suitable organic ester plasticizers include diethylene glycol di-2-ethylhexanoate, dipropylene glycol di-2-ethylbutyrate, triethylene glycol di-2-ethylpentanoate, tetraethylene glycol di-2-ethylbutyrate, diethylene glycol dicaprylate, diethylene glycol dibenzoate, dipropylene glycol dibenzoate, dihexyl adipate, dioctyl adipate, hexylcyclohexyl adipate, a mixture of heptyl adipate and nonyl adipate, diisononyl adipate, diisodecyl adipate, heptylnonyl adipate, dibutyl sebacate, oil-modified alkyd sebacate, and a mixture of a phosphate ester and an adipate. Organic ester plasticizers other than those listed above may also be used. Adipate esters other than the above-mentioned adipates may also be used.

[0174] Examples of the organic phosphoric acid plasticizer include tributoxyethyl phosphate, isodecylphenyl phosphate, and triisopropyl phosphate.

[0175] The plasticizer is preferably a diester plasticizer represented by the following formula (1):

[0176] [ka]

[0177] In the above formula (1), R1 and R2 each represent an organic group having 5 to 10 carbon atoms, R3 represents an ethylene group, an isopropylene group, or an n-propylene group, and p represents an integer of 3 to 10. In the above formula (1), R1 and R2 each preferably represent an organic group having 6 to 10 carbon atoms.

[0178] The plasticizer preferably includes triethylene glycol di-2-ethylhexanoate (3GO), triethylene glycol di-2-ethylbutyrate (3GH), or triethylene glycol di-2-ethylpropanoate, more preferably triethylene glycol di-2-ethylhexanoate (3GO) or triethylene glycol di-2-ethylbutyrate (3GH), and even more preferably triethylene glycol di-2-ethylhexanoate.

[0179] In the interlayer film, the content of the plasticizer relative to 100 parts by weight of the resin (100 parts by weight of the thermoplastic resin when the resin is a thermoplastic resin; 100 parts by weight of the polyvinyl acetal resin when the resin is a polyvinyl acetal resin) is defined as content (0). The content (0) is preferably 25 parts by weight or more, more preferably 30 parts by weight or more, and preferably 100 parts by weight or less, more preferably 60 parts by weight or less, and even more preferably 50 parts by weight or less. When the content (0) is at least the lower limit, the penetration resistance of the laminated glass is further improved. When the content (0) is at most the upper limit, the transparency of the interlayer film is further improved.

[0180] Colorants: The first colored portion typically contains a colorant. Examples of the colorant include inorganic particles, pigments, and dyes. The second colored portion typically contains a colorant. Examples of the colorant include inorganic particles, pigments, and dyes.

[0181] Examples of the inorganic particles include carbon black particles, iron oxide particles, zinc oxide particles, calcium carbonate particles, alumina particles, kaolin clay particles, calcium silicate particles, magnesium oxide particles, magnesium hydroxide particles, aluminum hydroxide particles, magnesium carbonate particles, talc particles, feldspar powder particles, mica particles, baryte particles, barium carbonate particles, titanium oxide particles, silica particles, and glass beads. The inorganic particles may be used alone or in combination of two or more.

[0182] The inorganic particles preferably include carbon black particles, calcium carbonate particles, titanium oxide particles, or silica particles, more preferably carbon black particles or calcium carbonate particles, and even more preferably carbon black particles. Use of these preferred inorganic particles reduces unevenness in appearance when light passes through, thereby providing laminated glass with even more excellent appearance integrity.

[0183] The inorganic particles preferably have an average particle size of 1 μm or more, preferably 100 μm or less, and more preferably 50 μm or less. The average particle size indicates the weight-average particle size. The average particle size can be measured by dynamic light scattering using a light scattering measurement device with an Ar laser as a light source. Examples of the light scattering measurement device include the "DLS-6000AL" manufactured by Otsuka Electronics Co., Ltd.

[0184] Examples of the dye include pyrene-based dyes, aminoketone-based dyes, anthraquinone-based dyes, azo-based dyes, etc. The dyes may be used alone or in combination of two or more.

[0185] Examples of the pyrene dye include Solvent Green 5 (CAS79869-59-3) and Solvent Green 7 (CAS6358-69-6).

[0186] Examples of the aminoketone dyes include Solvent Yellow 98 (CAS12671-74-8), Solvent Yellow 85 (CAS12271-01-1), Solvent Red 179 (CAS8910-94-5), and Solvent Red 135 (CAS71902-17-5).

[0187] Examples of the anthraquinone dyes include Solvent Yellow 163 (CAS13676091-0), Solvent Red 207 (CAS15958-69-6), Disperse Red 92 (CAS12236-11-2), Solvent Violet 13 (CAS81-48-1), Disperse Violet 31 (CAS6408-72-6), Solvent Blue 97 (CAS61969-44-6), Solvent Blue 45 (CAS37229-23-5), Solvent Blue 104 (CAS116-75-6), and Disperse Blue 214 (CAS104491-84-1).

[0188] Examples of the azo dyes include Solvent Yellow 30 (CAS 3321-10-4), Solvent Red 164 (CAS 70956-30-8), and Disperse Blue 146 (CAS 88650-91-3).

[0189] The pigment may be an organic pigment or an inorganic pigment. The organic pigment may be an organic pigment having a metal atom or an organic pigment not having a metal atom. Only one type of the pigment may be used, or two or more types may be used in combination.

[0190] Examples of the organic pigment include phthalocyanine compounds, quinacridone compounds, azo compounds, pentaphene compounds, perylene compounds, indole compounds, and dioxazine compounds.

[0191] Examples of the inorganic pigment include carbon black, iron oxide, zinc oxide, and titanium oxide.

[0192] The inorganic pigment more preferably contains carbon black. Use of carbon black reduces unevenness in appearance when light passes through, resulting in laminated glass with even more uniform appearance.

[0193] The colored portion more preferably contains calcium carbonate particles, titanium oxide particles, silica particles, or carbon black. The use of carbon black reduces unevenness in appearance when light passes through, resulting in a laminated glass with even more uniform appearance.

[0194] Other Ingredients: The interlayer film, the transparent portion, and the colored portion may each contain, as necessary, additives such as heat-shielding particles, light-shielding agents, colorants, ultraviolet absorbers, antioxidants, adhesion modifiers, light stabilizers, flame retardants, antistatic agents, moisture-resistant agents, heat-reflecting agents, and heat-absorbing agents. The additives may be used alone or in combination of two or more.

[0195] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to the following examples.

[0196] (Example 1 7, Reference Examples 8 to 10, Examples 11 to 14 and Comparative Examples 1 and 2) Preparation of the composition for forming the transparent part: 100 parts by weight of polyvinyl butyral resin and 40 parts by weight of plasticizer (3GO) were blended and thoroughly kneaded with a mixing roll to obtain a composition for forming a transparent portion.

[0197] Preparation of compositions for forming the first colored portion and the second colored portion: A composition for forming the first and second colored portions was obtained by thoroughly kneading 100 parts by weight of polyvinyl butyral resin, 40 parts by weight of plasticizer (3GO), and the types of colorants shown in Tables 1 and 2 below using a mixing roll. The blending amounts of the colorants were as shown in Table 1, and the thicknesses of the transparent portion, first colored portion, and second colored portion were set so that the visible light transmittance of the resulting laminated glass would be the values ​​shown in Tables 1 and 2 below.

[0198] Preparation of interlayer: Interlayer films having the configurations shown in Tables 1 and 2 below (Configuration A, Configuration B, Configuration C, or other configurations) were produced. The distance between one end of the interlayer film and the other end (width direction length) was set as shown in Tables 1 and 2 below. The distance in the direction perpendicular to the direction between one end of the interlayer film and the other end (width direction) was set to 50 cm.

[0199] An interlayer film was obtained by co-extruding a composition for forming the transparent portion and compositions for forming the first and second colored portions using a co-extruder. In the planar direction of the interlayer film, the length of the first non-gradation portion in the first colored portion, the length of the first gradation portion in the first colored portion, the length of the second non-gradation portion in the second colored portion, and the length of the second gradation portion in the second colored portion were set as shown in Tables 1 and 2 below. Note that, in an interlayer film having structure B, the obtained interlayer film may be sliced ​​in the thickness direction, and the cross section of the obtained interlayer film in the thickness direction may be exposed to measure the lengths of the first and second non-gradation portions and the lengths of the first and second gradation portions.

[0200] In Comparative Example 1, a first colored portion was formed, but a second colored portion was not formed. The interlayer film of Comparative Example 1 did not have the above-mentioned structures A, B, and C, but had other structures. In Comparative Example 2, a first colored portion and a second colored portion were formed, and a structure similar to the above-mentioned structure C was adopted, but the distance D was set to 50 cm. The interlayer film of Comparative Example 2 did not have the above-mentioned structures A, B, and C, but had another structure similar to the above-mentioned structure C (the distance D was greater than 30 cm).

[0201] Therefore, Examples 1 to 7, Reference Examples 8 to 10, Examples 11 to The interlayer films of Examples 1 to 14 and Comparative Examples 1 and 2 have, as the first gradation portion, a portion in which the visible light transmittance increases from the one end side of the interlayer film toward the other end side. 7, Reference Examples 8 to 10, Examples 11 to The interlayer films of No. 14 and Comparative Example 2 have, as the second gradation portion, a portion where the visible light transmittance increases from the other end side toward the one end side of the interlayer film.

[0202] Laminated glass production: Two sheets of green glass (2 mm thick, 100 cm long, 50 cm wide) conforming to JIS R3208 were prepared. The resulting interlayer film was sandwiched between the two sheets of green glass so that the longitudinal direction of the green glass was the same as the direction connecting one end of the interlayer film to the other, and so that the lateral direction of the green glass was the same as the direction perpendicular to the direction connecting one end of the interlayer film to the other. The glass was then held at 90°C for 30 minutes in a vacuum laminator and vacuum pressed to obtain laminated glass. When the distance between one end of the interlayer film and the other end (width) exceeded 1 m, the laminated glass was obtained as follows. For the interlayer film having the above-mentioned configuration A, the resulting interlayer film was sandwiched between the two sheets of green glass so that the tips of the first gradation portion and the second gradation portion were positioned in the longitudinal center of the green glass. In the case of an interlayer film having the above-mentioned configuration B, the above-mentioned configuration C, or another configuration, the obtained interlayer film was sandwiched between two sheets of green glass so that a position equidistant from the tip of the first gradation portion and the tip of the second gradation portion was positioned at the vertical center of the green glass. Furthermore, the interlayer film protruding from the green glass was cut off to obtain laminated glass.

[0203] (evaluation) (1)Visible light transmittance Using a spectrophotometer (Hitachi High-Tech U-4100) in accordance with JIS R3106:1998, the obtained laminated glass was measured at a wavelength of 380 nm. The visible transmittance at ~780 nm was measured.

[0204] The visible light transmittance values ​​of the obtained laminated glasses are shown in Tables 1 and 2 below.

[0205] 1) Visible light transmittance of the first non-gradation portion in the first colored portion 2) Visible light transmittance of the second non-gradation portion in the second colored portion 3) The percentage of the area of ​​the laminated glass where the visible light transmittance is 60% or less out of the total area of ​​the laminated glass (100%) 4) Visible light transmittance of the part of the laminated glass with the highest visible light transmittance

[0206] (2) Uniform appearance The laminated glass was installed at a 30-degree angle to the horizontal. Twenty evaluators visually inspected the entire laminated glass from a distance of 3 m and evaluated the integrity of the appearance according to the following criteria. Tables 1 and 2 show the number of people who gave a rating of ○.

[0207] [Criteria for determining appearance integrity] ○ (Good): The gradation area and its vicinity (both sides) appear to be consistent. × (Poor): The gradation area and its vicinity (both sides) do not appear to be consistent.

[0208] (3) Light visibility The laminated glass was placed at an angle of 30°. An LED light was shone on the laminated glass while moving the irradiated area from one end to the other. Twenty evaluators visually observed the irradiated laminated glass from a distance of 3 m and judged the visibility of the light display according to the following criteria. Tables 1 and 2 show the number of people who rated it as "good."

[0209] [Display visibility criteria] ○ (Good): The light is clearly visible in the gradation area and its vicinity (both sides). × (Poor): The light is difficult to see in the gradation area and its vicinity (both sides).

[0210] The details and results are shown in Tables 1 and 2 below.

[0211] [Table 1]

[0212] [Table 2]

[0213] Example 1 7, Reference Examples 8 to 10, Examples 11 to The laminated glass obtained in Examples 1 to 14 had excellent appearance integrity. 7, Reference Examples 8 to 10, Examples 11 to The laminated glass obtained in Example 14 also had excellent display visibility. 7, Reference Examples 8 to 10, Examples 11 to In Example 14, polyvinyl acetal resin was used as the resin and carbon black was used as the colorant, but as long as the configuration according to the present invention is satisfied, excellent uniformity in appearance can be achieved even if a resin other than polyvinyl acetal resin and a colorant other than carbon black are used. [Explanation of symbols]

[0214] 1,1A,1B,1C,1D,1E,1F,1G...Transparent part 2, 2A, 2B, 2D, 2E, 2F, 2G...First coloring section 2C...First colored part (first gradation part) 2X, 2AX, 2BX, 2DX, 2EX, 2FX, 2GX...First gradation part 2Xa, 2AXa, 2BXa, 2DXa, 2EXa, 2FXa, 2GXa...tip 2Ca…tip 2Y, 2AY, 2BY, 2DY, 2EY, 2FY, 2GY...First ungraded part 3,3A,3B,3D,3E,3F,3G...Second colored part 3C...Second colored part (second gradation part) 3X, 3AX, 3BX, 3DX, 3EX, 3FX, 3GX...Second gradation part 3Xa,3AXa,3BXa,3DXa,3EXa,3FXa,3GXa…Tip 3Ca…tip 3Y, 3AY, 3BY, 3DY, 3EY, 3FY, 3GY...Second non-gradation part 4F…Third coloring section 11,11A,11B,11C,11D,11E,11F,11G...Intermediate film 11a, 11Aa, 11Ba, 11Ca, 11Da, 11Ea, 11Fa, 11Ga...One end 11b, 11Ab, 11Bb, 11Cb, 11Db, 11Eb, 11Fb, 11Gb... other end 21...First laminated glass member 22...Second laminated glass member 31, 31A, 31B, 31C, 31D, 31E, 31F, 31G...Laminated glass 51...Backup light or brake light E...Coloring agent

Claims

1. It has one end and another end opposite to the one end, A first colored portion and a second colored portion are included. the first colored portion includes a portion located closer to the one end of the interlayer film than the second colored portion, and the second colored portion includes a portion located closer to the other end of the interlayer film than the first colored portion, the first colored portion has a first gradation portion in which the visible light transmittance increases from the one end side toward the other end side of the interlayer film, and the first gradation portion constitutes a tip of the first colored portion on the other end side of the interlayer film, the second colored portion has a second gradation portion in which the visible light transmittance increases from the other end side to the one end side of the interlayer film, and the second gradation portion constitutes a tip of the second colored portion on the one end side of the interlayer film, When the interlayer film is viewed from above, the sum of 1) the planar area of ​​a portion of the first colored portion and the second colored portion where only the first colored portion is present, 2) the planar area of ​​a portion of the first colored portion and the second colored portion where only the second colored portion is present, and 3) the planar area of ​​a portion of the first colored portion and the second colored portion where both the first colored portion and the second colored portion are present is 80% or more, out of a total planar area (100%) of the interlayer film, The interlayer film for laminated glass has the following configuration A or B. Configuration A: "When the interlayer film is viewed in plan, the position of the tip of the first gradation portion is the same as the position of the tip of the second gradation portion." Configuration B: "When the interlayer film is viewed in plan, there is a region where the first gradation portion and the second gradation portion overlap."

2. 2. The interlayer film for laminated glass according to claim 1, wherein, when the interlayer film is viewed in a plan view, the sum of 1) the plan area of ​​a portion of the first colored portion and the second colored portion where only the first colored portion is present, 2) the plan area of ​​a portion of the first colored portion and the second colored portion where only the second colored portion is present, and 3) the plan area of ​​a portion of the first colored portion and the second colored portion where both the first colored portion and the second colored portion are present is 90% or more of the total plan area of ​​the interlayer film (100%).

3. 3. The interlayer film for laminated glass according to claim 1 or 2, wherein, when laminated glass is obtained by sandwiching the interlayer film for laminated glass between two sheets of green glass having a thickness of 2 mm conforming to JIS R3208, the area of ​​the laminated glass having a visible light transmittance of 60% or less accounts for 80% or more of the total area (100%) of the laminated glass.

4. 4. The interlayer film for laminated glass according to claim 1, wherein when laminated glass is obtained by sandwiching the interlayer film for laminated glass between two sheets of green glass having a thickness of 2 mm conforming to JIS R3208, the visible light transmittance of a portion of the entire laminated glass having the highest visible light transmittance is 60% or less.

5. the first colored portion extends to the one end of the intermediate film, The interlayer film for laminated glass according to any one of claims 1 to 4, wherein the second colored portion extends to the other end of the interlayer film.

6. a transparent portion disposed on at least one surface side of the first colored portion in the thickness direction of the interlayer film; The interlayer film for laminated glass according to any one of claims 1 to 5, further comprising a transparent portion disposed on at least one surface side of the second colored portion in a thickness direction of the interlayer film.

7. The interlayer film for laminated glass according to any one of claims 1 to 6, which is an interlayer film for laminated glass used for a backlight or brake light display part.

8. The interlayer film for laminated glass according to any one of claims 1 to 7, which is used for rear glass, roof glass, or rear-roof integrated glass.

9. The interlayer film for laminated glass according to any one of claims 1 to 8, comprising: Configuration A: "in a plan view of the interlayer film, the position of an end of the first gradation portion is the same as the position of an end of the second gradation portion."

10. The interlayer film for laminated glass according to any one of claims 1 to 8, further comprising: Element B: "When the interlayer film is viewed in a plan view, there is a region where the first gradation portion and the second gradation portion overlap."

11. a first laminated glass member; and a second laminated glass member; and and the interlayer film for laminated glass according to any one of claims 1 to 10, The laminated glass, wherein the interlayer film for laminated glass is disposed between the first laminated glass member and the second laminated glass member.

12. 12. The laminated glass according to claim 11, wherein the area of ​​the portion having a visible light transmittance of 60% or less is 80% or more of the total area (100%) of the laminated glass.

13. 13. The laminated glass according to claim 11 or 12, wherein the visible light transmittance of a portion of the laminated glass having the maximum visible light transmittance is 60% or less.

14. The car body, The automobile window glass is provided with laminated glass, The laminated glass of an automobile includes a first laminated glass member, a second laminated glass member, and the interlayer film for laminated glass according to any one of claims 1 to 10, wherein the interlayer film for laminated glass is disposed between the first laminated glass member and the second laminated glass member.

15. Equipped with a backlight or brake light, When the intermediate film has the configuration A, a portion where an end of the first gradation portion and an end of the second gradation portion are positioned at the same position is a display portion of the backlight or the brake light, 15. The automobile according to claim 14, wherein, when the interlayer film has the configuration B, the area where the first gradation portion and the second gradation portion overlap is a display portion of the backlight or brake light.

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