JP7150430B2 - LAMINATED GLASS AND HEAD UP DISPLAY SYSTEM MANUFACTURING METHOD - Google Patents

Description

TECHNICAL FIELD The present invention relates to laminated glass using an interlayer. The present invention also relates to a method of manufacturing a head-up display system using the laminated glass.

Laminated glass generally scatters a small amount of glass fragments even if it is broken by an external impact, and is excellent in safety. Therefore, the laminated glass is widely used in automobiles, railroad vehicles, aircraft, ships, buildings, and the like. The laminated glass is manufactured by sandwiching an interlayer film for laminated glass between a pair of glass plates.

A head-up display (HUD) is also known as the laminated glass used in automobiles. The HUD can display measurement information such as speed, which is travel data of the vehicle, on the windshield of the vehicle, and the driver can recognize the display as if it were projected in front of the windshield.

In the above HUD, there is a problem that measurement information and the like appear double.

A wedge-shaped interlayer is used to suppress double images. Patent Document 1 below discloses a laminated glass in which a wedge-shaped intermediate film having a predetermined wedge angle is sandwiched between a pair of glass plates. In such laminated glass, by adjusting the wedge angle of the interlayer film, the measurement information reflected by one glass plate and the measurement information reflected by another glass plate can be displayed in the field of view of the driver. You can connect to one point. Therefore, the display of the measurement information is less likely to be doubled, and the driver's field of view is less likely to be obstructed.

Patent Document 2 below discloses a laminated glass in which a rectangular intermediate film is sandwiched between a wedge-shaped glass plate and a rectangular glass plate. Patent Document 2 also discloses laminated glass in which a rectangular intermediate film is sandwiched between wedge-shaped glass plates.

Japanese Patent Publication No. 4-502525 WO2017/090561A1

In the HUD, it is desired that multiple images do not occur in the display area for measurement information and the like. A multiple image is, for example, a phenomenon in which a multiple image is observed due to information irradiation from an information display device.

Conventionally, in order to suppress multiple images, the wedge angle of a wedge-shaped intermediate film is adjusted, or the wedge angle of a wedge-shaped glass plate is adjusted. In order to suppress multiple images, it is conceivable to increase the wedge angle over the entire surface of the laminated glass. However, if the wedge angle is simply increased, the handleability of the laminated glass is lowered and the laminated glass becomes heavy.

The present inventors partially changed the amount of increase in thickness in the direction connecting one end and the other end of the glass plate, thereby partially increasing the amount of increase in thickness in the display area of the HUD, resulting in multiple images. was further suppressed, and the amount of increase in thickness was partially reduced to suppress the maximum thickness of the laminated glass. In addition, the inventors have investigated the use of a glass plate whose thickness is partially changed in order to suppress multiple images. However, as a result of studies by the present inventors, it has been found that using such a glass plate having a partially changed amount of increase in thickness causes a new problem due to the low flatness of the surface of the glass plate. I found out. For example, it has been found that the wiper causes uneven drainage on the outer surface of the glass plate of the laminated glass.

SUMMARY OF THE INVENTION An object of the present invention is to provide a laminated glass in which multiple images are suppressed, and which is capable of improving water removal performance with a wiper. Another object of the present invention is to provide a method for manufacturing a head-up display system using the laminated glass.

According to a broad aspect of the present invention, a first laminated glass member and a second laminated glass member having one end and the other end opposite to the one end and having a greater thickness than the one end; an interlayer disposed between the first laminated glass member and the second laminated glass member, wherein the second laminated glass member has a wedge angle of 0.1 mrad or more; is less than the following distance B on the outer surface of said second laminated glass member.

Distance A: In the cross section of the laminated glass in the thickness direction, the first end of the outer surface of the first laminated glass member positioned on the one end side of the laminated glass and the distance between the other end of the laminated glass A straight line A connecting the second end of the outer surface of the first laminated glass member is drawn. A distance A is defined as the distance from the straight line A to the farthest point on the outer surface of the first laminated glass member.

Distance B: In the cross section of the laminated glass in the thickness direction, the first end of the outer surface of the second laminated glass member positioned on the one end side of the laminated glass and the distance between the first end on the other end side of the laminated glass A straight line B connecting the second end of the outer surface of the second laminated glass member is drawn. A distance B is defined as the distance from the straight line B to the farthest point on the outer surface of the second laminated glass member.

In a specific aspect of the laminated glass according to the present invention, the maximum thickness of the second laminated glass member is greater than the maximum thickness of the first laminated glass member.

In a specific aspect of the laminated glass according to the present invention, the wedge angle of the second laminated glass member is larger than the wedge angle of the intermediate film.

In a specific aspect of the laminated glass according to the present invention, the wedge angle of the second laminated glass member is greater than the wedge angle of the intermediate film by 0.10 mrad or more.

In a specific aspect of the laminated glass according to the present invention, the intermediate film has a wedge angle of less than 0.10 mrad.

In a specific aspect of the laminated glass according to the present invention, the intermediate film has a wedge angle of 0.10 mrad or more.

In a specific aspect of the laminated glass according to the present invention, the laminated glass is laminated glass that is a head-up display and has a display area for the head-up display.

In a specific aspect of the laminated glass according to the present invention, the intermediate film contains a thermoplastic resin.

In a specific aspect of the laminated glass according to the present invention, the intermediate film contains a plasticizer.

In a specific aspect of the laminated glass according to the present invention, the intermediate film includes a first layer and a second layer arranged on the first surface side of the first layer.

In a specific aspect of the laminated glass according to the present invention, the intermediate film includes a third layer arranged on the second surface side of the first layer opposite to the first surface.

In a broad aspect of the present invention, an opening between an outer space and an inner space into which heat rays are incident from the outer space, a wiper for draining the laminated glass, and irradiating the laminated glass with light for image display. and a light source device for doing so that the first laminated glass member is positioned on the exterior space side, and the second laminated glass member is positioned on the interior space side, A method for manufacturing a head-up display system is provided, comprising the step of attaching the above-described laminated glass to the opening, and bringing the wiper into contact with the outer surface of the first laminated glass member.

A laminated glass according to the present invention has one end and the other end opposite to the one end and having a greater thickness than the one end. A laminated glass according to the present invention includes a first laminated glass member, a second laminated glass member, and an interlayer disposed between the first laminated glass member and the second laminated glass member. Prepare. In the laminated glass according to the present invention, the second laminated glass member has a wedge angle of 0.1 mrad or more. In the laminated glass according to the present invention, the distance A on the outer surface of the first laminated glass member is smaller than the distance B on the outer surface of the second laminated glass member. Since the laminated glass according to the present invention has the above configuration, it is possible to improve the draining performance of the wiper in the laminated glass in which multiple images are suppressed.

1(a) and 1(b) are a sectional view and a front view schematically showing laminated glass according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view schematically showing a laminated glass according to a second embodiment of the invention. FIG. 3 is a cross-sectional view schematically showing laminated glass according to a third embodiment of the present invention. FIG. 4 is a cross-sectional view schematically showing laminated glass according to a fourth embodiment of the present invention. FIG. 5 is a cross-sectional view schematically showing laminated glass according to a fifth embodiment of the present invention. FIG. 6 is a cross-sectional view schematically showing a laminated glass according to a sixth embodiment of the invention. 7(a) and 7(b) are a sectional view and a front view schematically showing laminated glass according to a seventh embodiment of the present invention. FIG. 8 is a cross-sectional view schematically showing laminated glass according to an eighth embodiment of the present invention. FIG. 9 is a cross-sectional view schematically showing laminated glass according to a ninth embodiment of the present invention. FIG. 10 is a cross-sectional view schematically showing laminated glass according to a tenth embodiment of the present invention. FIG. 11 is a cross-sectional view schematically showing laminated glass according to the eleventh embodiment of the present invention. FIG. 12 is a cross-sectional view schematically showing laminated glass according to a twelfth embodiment of the present invention. FIG. 13 is a diagram for explaining straight line A and distance A, and straight line B and distance B in the present invention.

The present invention will be described in detail below.

A laminated glass according to the present invention has one end and the other end opposite to the one end and having a greater thickness than the one end. A laminated glass according to the present invention includes a first laminated glass member, a second laminated glass member, and an intermediate film. In the laminated glass according to the present invention, the intermediate film is arranged between the first laminated glass member and the second laminated glass member.

In the laminated glass according to the present invention, the second laminated glass member has a wedge angle of 0.1 mrad or more. In the laminated glass according to the present invention, the second laminated glass member has a wedge angle of 0.1 mrad or more. In the laminated glass according to the present invention, the following distance A on the outer surface of the first laminated glass member is smaller than the following distance B on the outer surface of the second laminated glass member.

Distance A: In the cross section of the laminated glass in the thickness direction, the first end of the outer surface of the first laminated glass member positioned on the one end side of the laminated glass and the distance between the first end on the other end side of the laminated glass A straight line A connecting the second end of the outer surface of the first laminated glass member is drawn. A distance A is defined as the distance from the straight line A to the farthest point on the outer surface of the first laminated glass member.

Distance B: In the cross section of the laminated glass in the thickness direction, the first end of the outer surface of the second laminated glass member located on the one end side of the laminated glass and the other end of the laminated glass. A straight line B connecting the second end of the outer surface of the second laminated glass member is drawn. A distance B is defined as the distance from the straight line B to the farthest point on the outer surface of the second laminated glass member.

The first laminated glass member has one end and the other end opposite to the one end. The one end and the other end are end portions on opposite sides of the first laminated glass member.

The second laminated glass member has one end and the other end opposite to the one end. The one end and the other end are end portions on opposite sides of the second laminated glass member. In the second laminated glass member, the thickness of the other end is greater than the thickness of the one end.

The laminated glass has one end and the other end opposite to the one end. The one end and the other end are opposite ends of the laminated glass. In the laminated glass, the thickness of the other end is greater than the thickness of the one end.

The intermediate film has one end and the other end opposite to the one end. The one end and the other end are opposite ends of the intermediate film.

One end of the first laminated glass member, the second laminated glass member, and the intermediate film are on one end side of the laminated glass. The other end of the first laminated glass member, the second laminated glass member, and the intermediate film are the other end side of the laminated glass.

The first end of the outer surface of the first laminated glass member is located on the one end side of the first laminated glass member. The second end of the outer surface of the first laminated glass member is located on the other end side of the first laminated glass member.

The first end of the outer surface of the second laminated glass member is located on the one end side of the second laminated glass member. The second end of the outer surface of the second laminated glass member is located on the other end side of the second laminated glass member.

Since the present invention has the above configuration, multiple images can be suppressed. In the present invention, when the display information is reflected from the display unit onto the laminated glass, the occurrence of multiple images is considerably suppressed.

In the above laminated glass, measurement information such as speed transmitted from the control unit can be displayed on the windshield from the display unit of the instrumental panel. Therefore, the driver of the vehicle can visually recognize the front field of view and the measurement information at the same time without lowering the field of view.

The outer surface of the first laminated glass member is the wiper contact surface. In the laminated glass according to the present invention, the flatness of the outer surface of the first laminated glass member is excellent, so the draining performance by the wiper is enhanced.

The distance A is the maximum value of the depth of recesses on the surface of the first laminated glass member with respect to the straight line A and the maximum value of the height of protrusions on the surface of the first laminated glass member with respect to the straight line A, whichever is greater. is the value of

The outer surface of the first laminated glass member contacts the wiper. Therefore, it is preferable that the outer surface of the first laminated glass member has excellent flatness. From the viewpoint of improving flatness, the distance A on the outer surface of the first laminated glass member is smaller than the distance B on the outer surface of the second laminated glass member. The outer surface of the first laminated glass member has better flatness than the outer surface of the second laminated glass member. When the distance A is 0 μm, the outer surface of the first laminated glass member is a completely flat surface. The smaller the distance A, the better the flatness.

The distance B is the maximum value of the depth of the recesses on the surface of the second laminated glass member with respect to the straight line B and the maximum value of the height of the protrusions on the surface of the second laminated glass member with respect to the straight line B, whichever is larger. is the value of

The outer surface of the second laminated glass member generally does not contact the wiper. Therefore, the outer surface of the second laminated glass member does not need to be very flat. From the viewpoint of effectively suppressing multiple images, the outer surface shape of the second laminated glass member can be appropriately changed. The distance B on the outer surface of the second laminated glass member is greater than the distance A on the outer surface of the first laminated glass member.

In FIG. 13 showing the laminated glass 11 of FIG. 1, which will be described later, straight lines A and B are indicated by thick lines, and distance B is indicated by thin lines. In addition, since the distance A is 0 in the laminated glass 11, the distance A is not illustrated in FIG. When the first laminated glass member has a concave portion or a convex portion with respect to the straight line A on the outer surface, the distance A is obtained based on the straight line A in the same manner as the relationship between the straight line B and the distance B. be done.

The inner surface of the first laminated glass member may be a flat surface or a non-flat surface.

The inner surface of the second laminated glass member may be a flat surface or a non-flat surface.

From the viewpoint of effectively suppressing multiple images, the maximum thickness of the second laminated glass member is preferably larger than the maximum thickness of the first laminated glass member.

From the viewpoint of effectively suppressing multiple images, the ratio of the maximum thickness of the second laminated glass member to the maximum thickness of the first laminated glass member is preferably 1.05 or more, more preferably 1.1. 1.2 or more, more preferably 1.2 or more. From the viewpoint of effectively increasing the penetration resistance on both sides of the laminated glass, the ratio of the maximum thickness of the second laminated glass member to the maximum thickness of the first laminated glass member is preferably 10 or less, more It is preferably 5 or less, more preferably 2.5 or less. A ratio of the maximum thickness of the second laminated glass member to the maximum thickness of the first laminated glass member may be 0.2 or more, or 0.5 or more.

The second laminated glass member is a wedge-shaped laminated glass member having a wedge angle of 0.1 mrad or more.

The "wedge angle" in the second laminated glass member having a wedge angle of 0.10 mrad or more means the wedge angle of the entire second laminated glass member.

The first laminated glass member may have a wedge angle of 0.10 mrad or more, and may have a wedge angle of less than 0.10 mrad. The first laminated glass member may be a wedge-shaped laminated glass member or a rectangular laminated glass member. From the viewpoint of further suppressing multiple images, the first laminated glass member preferably has a wedge angle of 0.10 mrad or more, and is preferably a wedge-shaped first laminated glass member.

The "wedge angle" in the first laminated glass member means the wedge angle of the entire first laminated glass member.

The interlayer may have a wedge angle of 0.10 mrad or greater and may have a wedge angle of less than 0.10 mrad. The intermediate film may be a wedge-shaped intermediate film or a rectangular intermediate film. From the viewpoint of further suppressing multiple images, the intermediate film preferably has a wedge angle of 0.10 mrad or more, and is preferably a wedge-shaped intermediate film. From the viewpoint of further improving the uniformity of performance such as heat shielding properties and color tone exhibited by the intermediate film, the intermediate film preferably has a wedge angle of less than 0.10 mrad, and is preferably a rectangular intermediate film. .

The "wedge angle" in the intermediate film means the wedge angle of the entire intermediate film.

From the viewpoint of further suppressing multiple images, the wedge angle of the first laminated glass member is preferably larger than the wedge angle of the intermediate film. From the viewpoint of further suppressing multiple images, the wedge angle of the first laminated glass member is preferably larger than the wedge angle of the intermediate film by 0.05 mrad or more, more preferably 0.10 mrad or more, and still more preferably. is greater than 0.15 mrad, particularly preferably greater than 0.20 mrad and most preferably greater than 0.25 mrad.

From the viewpoint of further suppressing multiple images, the wedge angle of the second laminated glass member is preferably larger than the wedge angle of the intermediate film. From the viewpoint of further suppressing multiple images, the wedge angle of the second laminated glass member is preferably larger than the wedge angle of the intermediate film by 0.05 mrad or more, more preferably by 0.10 mrad or more, and still more preferably. is greater than 0.15 mrad, particularly preferably greater than 0.20 mrad and most preferably greater than 0.25 mrad.

The intermediate film has a one-layer structure or a two-layer or more structure. The intermediate film may have a single-layer structure or a two-layer or more structure. The intermediate film may have a two-layer structure, or may have a three-layer or more structure. The intermediate film may be a single-layer intermediate film or a multi-layer intermediate film.

The wedge angle of the second laminated glass member is 0.10 mrad or more. From the viewpoint of further suppressing multiple images in the present invention, the wedge angle of the second laminated glass member is preferably 0.15 mrad or more, more preferably 0.20 mrad or more, and still more preferably 0.25 mrad or more. is 2.0 mrad or less, more preferably 1.5 mrad or less.

The wedge angle of the first laminated glass member is 0 mrad or more (not wedge-shaped when 0 mrad). From the viewpoint of further suppressing multiple images in the present invention, the wedge angle of the first laminated glass member is preferably 0 mrad or more, more preferably 0.10 mrad or more, still more preferably 0.15 mrad or more, and particularly preferably It is 0.20 mrad or more, most preferably 0.25 mrad or more, preferably 2.0 mrad or less, more preferably 1.5 mrad or less.

The wedge angle of the intermediate film is 0 mrad or more (not wedge-shaped when 0 mrad). The wedge angle of the intermediate film is preferably 0 mrad or more, preferably less than 2.0 mrad, and more preferably less than 1.5 mrad. From the viewpoint of further enhancing multiple images, the wedge angle of the intermediate film is preferably less than 0.10 mrad, more preferably 0.50 mrad or less, and even more preferably 0.03 mrad or less. The wedge angle of the intermediate film may be 0 mrad (not wedge-shaped when 0 mrad), may exceed 0 mrad, may be 0.03 mrad or more, or may be 0.05 mrad or more. .

The intermediate film has, for example, a display corresponding area corresponding to the display area of the head-up display. The display corresponding area is an area in which information can be displayed satisfactorily.

The intermediate film is suitably used for a laminated glass that is a head-up display (HUD). The intermediate film is preferably an intermediate film for HUD.

The laminated glass has, for example, a display area of a head-up display. The display area is an area in which information can be displayed satisfactorily.

The laminated glass is preferably a head-up display (HUD).

From the viewpoint of further suppressing multiple images in the present invention, the wedge angle of the laminated glass is preferably 0.10 mrad or more, more preferably 0.15 mrad or more, still more preferably 0.20 mrad or more, and most preferably 0.2 mrad or more. It is 25 mrad or more, preferably 2.0 mrad or less, more preferably 1.5 mrad or less.

From the viewpoint of obtaining laminated glass suitable for vehicles with a large windshield installation angle such as trucks and buses, the wedge angle of the laminated glass is preferably 0.10 mrad or more, more preferably 0.15 mrad or more, and still more preferably 0. .20 mrad or more, particularly preferably 0.25 mrad or more.

The wedge angle of the laminated glass is preferably 0.9 mrad or less, more preferably 0.8 mrad or less, from the viewpoint of obtaining a laminated glass suitable for a vehicle such as a sports car having a small windshield installation angle.

The wedge angle θ of the laminated glass is defined by a straight line connecting the first surface (one surface) portion of the laminated glass between the maximum thickness portion and the minimum thickness portion of the laminated glass, and the maximum thickness portion and the minimum thickness portion of the laminated glass. is the internal angle at the intersection with the straight line connecting the second surface (the other surface) portion of the laminated glass. If there are multiple maximum thickness portions, multiple minimum thickness portions, the maximum thickness portion is in a certain region, or the minimum thickness portion is in a certain region, the maximum thickness portion for obtaining the wedge angle θ and the minimum thickness portion are selected such that the desired wedge angle θ is the largest. The wedge angles of the first laminated glass member, the second laminated glass member, and the interlayer can be determined in the same manner as the wedge angle of the laminated glass.

The wedge angle of the perfectly rectangular laminated glass member and the perfectly rectangular intermediate film is 0 mrad. An angle of 0 mrad for non-wedge-shaped laminated glass members and an angle of 0 mrad for non-wedge-shaped interlayers are also referred to as wedge angles.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

1(a) and 1(b) are a cross-sectional view and a front view schematically showing an intermediate film for laminated glass according to a first embodiment of the present invention. FIG. 1(a) is a cross-sectional view taken along line II in FIG. 1(b). FIG. 2 is a cross-sectional view schematically showing a laminated glass according to a second embodiment of the invention. FIG. 3 is a cross-sectional view schematically showing laminated glass according to a third embodiment of the present invention. FIG. 4 is a cross-sectional view schematically showing laminated glass according to a fourth embodiment of the present invention. FIG. 5 is a cross-sectional view schematically showing laminated glass according to a fifth embodiment of the present invention. FIG. 6 is a schematic cross-sectional view of a laminated glass according to a sixth embodiment of the invention.

Note that the sizes and dimensions of the laminated glass in FIGS. And the shape is changed as appropriate. 1(a), 1(b), 2, 3, 4, 5, 6 and later-described figures, for convenience of illustration, the thickness of the laminated glass and each member constituting the laminated glass, and The wedge angle (θ) is shown to differ from the actual thickness and wedge angle. 1(a), 1(b), 2, 3, 4, 5, 6 and later-described figures can be replaced with each other.

A laminated glass 11 is shown in FIGS. 1(a) and 1(b). FIG. 2 shows the laminated glass 11A. FIG. 3 shows the laminated glass 11B. FIG. 4 shows the laminated glass 11C. FIG. 5 shows the laminated glass 11D. FIG. 6 shows the laminated glass 11E.

Each of the laminated glasses 11, 11A, 11B, 11C, 11D, and 11E has one end 11a and the other end 11b opposite to the one end 11a. The one end 11a and the other end 11b are end portions on both sides facing each other. The thickness of the other end 11b of each of the laminated glasses 11, 11A, 11B, 11C, 11D, and 11E is greater than the thickness of the one end 11a. Therefore, each of the laminated glasses 11, 11A, 11B, 11C, 11D, and 11E has thin regions and thick regions.

The laminated glasses 11, 11A, 11B, 11C, 11D, and 11E are head-up displays. The laminated glass 11, 11A, 11B, 11C, 11D, 11E has a display area R1 of the head-up display.

Laminated glasses 11, 11A, 11B, 11C, 11D, and 11E have a peripheral region R2 next to the display region R1.

Each of the laminated glasses 11, 11A, 11B, 11C, 11D, and 11E has a shade region R3 separated from the display region R1. The shaded regions R3 are located at the edges of the laminated glasses 11, 11A, 11B, 11C, 11D and 11E.

A laminated glass 11 shown in FIGS. 1( a ) and 1 ( b ) includes a first laminated glass member 2 , an intermediate film 1 , and a second laminated glass member 3 . The first laminated glass member 2, the intermediate film 1, and the second laminated glass member 3 are arranged side by side in this order. The intermediate film 1 is arranged between the first laminated glass member 2 and the second laminated glass member 3 .

The intermediate film 1 is a multi-layered intermediate film having a structure of two or more layers. Specifically, the intermediate film 1 has a three-layer structure. The intermediate film 1 comprises a second layer 22 , a first layer 21 and a third layer 23 . The second layer 22, the first layer 21, and the third layer 23 are arranged side by side in this order. The first layer 21 is arranged between the second layer 22 and the third layer 23 . The second layer 22 is arranged on the first surface side of the first layer 21 . The third layer 23 is arranged on the second surface side opposite to the first surface of the first layer 21 .

The first laminated glass member 2 is wedge-shaped and has a wedge angle of 0.10 mrad or more. The second laminated glass member 3 is wedge-shaped and has a wedge angle of 0.10 mrad or more. The interlayer 1 is rectangular and has a wedge angle of less than 0.10 mrad. The first layer 21, the second layer 22 and the third layer 23 are rectangular and have a wedge angle of less than 0.10 mrad.

The distance A on the outer surface of the first laminated glass member 2 is smaller than the distance B on the outer surface of the second laminated glass member 3 . The second laminated glass member 3 has a concave portion with respect to the straight line B on the outer surface.

The laminated glass 11A shown in FIG. 2 includes a first laminated glass member 2A, an intermediate film 1A, and a second laminated glass member 3A. The first laminated glass member 2A, the intermediate film 1A, and the second laminated glass member 3A are arranged side by side in this order. The intermediate film 1A is arranged between the first laminated glass member 2A and the second laminated glass member 3A.

The intermediate film 1A is a multilayer intermediate film having a structure of two or more layers. Specifically, the intermediate film 1A has a three-layer structure. The intermediate film 1A includes a second layer 22A, a first layer 21A, and a third layer 23A. The second layer 22A, the first layer 21A, and the third layer 23A are arranged side by side in this order. The first layer 21A is arranged between the second layer 22A and the third layer 23A. The second layer 22A is arranged on the first surface side of the first layer 21A. The third layer 23A is arranged on the second surface side opposite to the first surface of the first layer 21A.

The first laminated glass member 2A is wedge-shaped and has a wedge angle of 0.10 mrad or more. The second laminated glass member 3A is wedge-shaped and has a wedge angle of 0.10 mrad or more. The interlayer 1A is rectangular and has a wedge angle of less than 0.10 mrad. The first layer 21A, the second layer 22A and the third layer 23A are rectangular and have a wedge angle of less than 0.10 mrad.

The distance A on the outer surface of the first laminated glass member 2A is smaller than the distance B on the outer surface of the second laminated glass member 3A. The second laminated glass member 3A has a convex portion with respect to the straight line B on the outer surface.

The laminated glass 11B shown in FIG. 3 includes a first laminated glass member 2B, an intermediate film 1B, and a second laminated glass member 3B. The first laminated glass member 2B, the intermediate film 1B, and the second laminated glass member 3B are arranged side by side in this order. The intermediate film 1B is arranged between the first laminated glass member 2B and the second laminated glass member 3B.

The intermediate film 1B is a multilayer intermediate film having a structure of two or more layers. Specifically, the intermediate film 1B has a three-layer structure. The intermediate film 1B includes a second layer 22B, a first layer 21B and a third layer 23B. The second layer 22B, the first layer 21B, and the third layer 23B are arranged side by side in this order. The first layer 21B is arranged between the second layer 22B and the third layer 23B. The second layer 22B is arranged on the first surface side of the first layer 21B. The third layer 23B is arranged on the side of the second surface opposite to the first surface of the first layer 21B.

The first laminated glass member 2B is wedge-shaped and has a wedge angle of 0.10 mrad or more. The second laminated glass member 3B is wedge-shaped and has a wedge angle of 0.10 mrad or more. The interlayer 1B is rectangular and has a wedge angle of less than 0.10 mrad. The first layer 21B, the second layer 22B and the third layer 23B are rectangular and have a wedge angle of less than 0.10 mrad.

The distance A on the outer surface of the first laminated glass member 2B is smaller than the distance B on the outer surface of the second laminated glass member 3B. The second laminated glass member 3B has a convex portion and a concave portion with respect to the straight line B on the outer surface.

A laminated glass 11C shown in FIG. 4 includes a first laminated glass member 2C, an intermediate film 1C, and a second laminated glass member 3C. The first laminated glass member 2C, the intermediate film 1C, and the second laminated glass member 3C are arranged side by side in this order. The intermediate film 1C is arranged between the first laminated glass member 2C and the second laminated glass member 3C. The second layer 22C is arranged on the first surface side of the first layer 21C. 23 C of 3rd layers are arrange|positioned at the 2nd surface side opposite to the said 1st surface of 21 C of 1st layers.

The intermediate film 1C is a multilayer intermediate film having a structure of two or more layers. Specifically, the intermediate film 1C has a three-layer structure. The intermediate film 1C includes a second layer 22C, a first layer 21C, and a third layer 23C. The second layer 22C, the first layer 21C, and the third layer 23C are arranged side by side in this order. The first layer 21C is arranged between the second layer 22C and the third layer 23C.

The first laminated glass member 2C is rectangular and has a wedge angle of less than 0.10 mrad. The second laminated glass member 3C is wedge-shaped and has a wedge angle of 0.10 mrad or more. The interlayer 1C is rectangular and has a wedge angle of less than 0.10 mrad. The first layer 21C, the second layer 22C and the third layer 23C are rectangular and have a wedge angle of less than 0.10 mrad.

The distance A on the outer surface of the first laminated glass member 2C is smaller than the distance B on the outer surface of the second laminated glass member 3C. 3 C of 2nd laminated glass members have a recessed part with respect to the said straight line B on an outer surface.

A laminated glass 11D shown in FIG. 5 includes a first laminated glass member 2D, an intermediate film 1D, and a second laminated glass member 3D. The first laminated glass member 2D, the intermediate film 1D, and the second laminated glass member 3D are arranged side by side in this order. The intermediate film 1D is arranged between the first laminated glass member 2D and the second laminated glass member 3D.

The intermediate film 1D is a multilayer intermediate film having a structure of two or more layers. Specifically, the intermediate film 1D has a three-layer structure. The intermediate film 1D includes a second layer 22D, a first layer 21D and a third layer 23D. The second layer 22D, the first layer 21D, and the third layer 23D are arranged side by side in this order. The first layer 21D is arranged between the second layer 22D and the third layer 23D. The second layer 22D is arranged on the first surface side of the first layer 21D. The third layer 23D is arranged on the side of the second surface opposite to the first surface of the first layer 21D.

The first laminated glass member 2D is wedge-shaped and has a wedge angle of 0.10 mrad or more. The second laminated glass member 3D is wedge-shaped and has a wedge angle of 0.10 mrad or more. The intermediate film 1D is wedge-shaped and has a wedge angle of 0.10 mrad or more. The first layer 21D is rectangular and has a wedge angle of less than 0.10 mrad. The second layer 22D and the third layer 23D are wedge-shaped and have a wedge angle of 0.10 mrad or more.

The distance A on the outer surface of the first laminated glass member 2D is smaller than the distance B on the outer surface of the second laminated glass member 3D. The second laminated glass member 3D has a concave portion with respect to the straight line B on the outer surface.

A laminated glass 11E shown in FIG. 6 includes a first laminated glass member 2E, an intermediate film 1E, and a second laminated glass member 3E. The first laminated glass member 2E, the intermediate film 1E, and the second laminated glass member 3E are arranged side by side in this order. The intermediate film 1E is arranged between the first laminated glass member 2E and the second laminated glass member 3E.

The intermediate film 1E is a multilayer intermediate film having a structure of two or more layers. Specifically, the intermediate film 1E has a three-layer structure. The intermediate film 1E includes a second layer 22E, a first layer 21E, and a third layer 23E. The second layer 22E, the first layer 21E, and the third layer 23E are arranged side by side in this order. The first layer 21E is arranged between the second layer 22E and the third layer 23E. The second layer 22E is arranged on the first surface side of the first layer 21E. The third layer 23E is arranged on the second surface side opposite to the first surface of the first layer 21E.

The first laminated glass member 2E is rectangular and has a wedge angle of less than 0.10 mrad. The second laminated glass member 3E is wedge-shaped and has a wedge angle of 0.10 mrad or more. The intermediate film 1E is wedge-shaped and has a wedge angle of 0.10 mrad or more. The first layer 21E and the second layer 22E are rectangular and have a wedge angle of less than 0.10 mrad. The third layer 23E is wedge-shaped and has a wedge angle of 0.10 mrad or more.

The distance A on the outer surface of the first laminated glass member 2E is smaller than the distance B on the outer surface of the second laminated glass member 3E. The second laminated glass member 3E has a concave portion with respect to the straight line B on the outer surface.

7(a) and 7(b) are a sectional view and a front view schematically showing laminated glass according to a seventh embodiment of the present invention. FIG. 7(a) is a cross-sectional view taken along line II in FIG. 7(b). FIG. 8 is a cross-sectional view schematically showing laminated glass according to an eighth embodiment of the present invention. FIG. 9 is a cross-sectional view schematically showing laminated glass according to a ninth embodiment of the present invention. FIG. 10 is a cross-sectional view schematically showing laminated glass according to a tenth embodiment of the present invention. FIG. 11 is a cross-sectional view schematically showing laminated glass according to the eleventh embodiment of the present invention. FIG. 12 is a cross-sectional view schematically showing laminated glass according to a twelfth embodiment of the present invention.

The laminated glass 11F is shown in FIGS. 7(a) and 7(b). FIG. 8 shows the laminated glass 11G. FIG. 9 shows the laminated glass 11H. FIG. 10 shows laminated glass 11I. FIG. 11 shows laminated glass 11J. FIG. 12 shows the laminated glass 11K.

Each of the laminated glasses 11F, 11G, 11H, 11I, 11J, and 11K has one end 11a and the other end 11b on the opposite side of the one end 11a. The one end 11a and the other end 11b are end portions on both sides facing each other. The thickness of the other end 11b of each of the laminated glasses 11F, 11G, 11H, 11I, 11J and 11K is greater than the thickness of the one end 11a. Accordingly, the laminated glasses 11F, 11G, 11H, 11I, 11J, and 11K have thin regions and thick regions.

Laminated glasses 11F, 11G, 11H, 11I, 11J, and 11K are head-up displays. The laminated glasses 11F, 11G, 11H, 11I, 11J, and 11K have a display area R1 for the head-up display.

Laminated glasses 11F, 11G, 11H, 11I, 11J, and 11K have a peripheral region R2 adjacent to the display region R1.

Each of the laminated glasses 11F, 11G, 11H, 11I, 11J, and 11K has a shade region R3 separated from the display region R1. The shade region R3 is located at the edges of the laminated glasses 11F, 11G, 11H, 11I, 11J and 11K.

A laminated glass 11F shown in FIGS. 7(a) and 7(b) includes a first laminated glass member 2F, an intermediate film 1F, and a second laminated glass member 3F. The first laminated glass member 2F, the intermediate film 1F, and the second laminated glass member 3F are arranged side by side in this order. The intermediate film 1F is arranged between the first laminated glass member 2F and the second laminated glass member 3F.

The intermediate film 1F is a single-layer intermediate film having a one-layer structure.

The first laminated glass member 2F is wedge-shaped and has a wedge angle of 0.10 mrad or more. The second laminated glass member 3F is wedge-shaped and has a wedge angle of 0.10 mrad or more. The interlayer 1F is rectangular and has a wedge angle of less than 0.10 mrad.

The distance A on the outer surface of the first laminated glass member 2F is smaller than the distance B on the outer surface of the second laminated glass member 3F. The second laminated glass member 3F has a concave portion with respect to the straight line B on the outer surface.

A laminated glass 11G shown in FIG. 8 includes a first laminated glass member 2G, an intermediate film 1G, and a second laminated glass member 3G. The first laminated glass member 2G, the intermediate film 1G, and the second laminated glass member 3G are arranged side by side in this order. The intermediate film 1G is arranged between the first laminated glass member 2G and the second laminated glass member 3G.

The intermediate film 1G is a single-layer intermediate film having a one-layer structure.

The first laminated glass member 2G is wedge-shaped and has a wedge angle of 0.10 mrad or more. The second laminated glass member 3G is wedge-shaped and has a wedge angle of 0.10 mrad or more. The interlayer 1G is rectangular and has a wedge angle of less than 0.10 mrad.

The distance A on the outer surface of the first laminated glass member 2G is smaller than the distance B on the outer surface of the second laminated glass member 3G. The second laminated glass member 3G has a convex portion with respect to the straight line B on the outer surface.

A laminated glass 11H shown in FIG. 9 includes a first laminated glass member 2H, an intermediate film 1H, and a second laminated glass member 3H. The first laminated glass member 2H, the intermediate film 1H, and the second laminated glass member 3H are arranged side by side in this order. The intermediate film 1H is arranged between the first laminated glass member 2H and the second laminated glass member 3H.

The intermediate film 1H is a single-layer intermediate film having a one-layer structure.

The first laminated glass member 2H is wedge-shaped and has a wedge angle of 0.10 mrad or more. The second laminated glass member 3H is wedge-shaped and has a wedge angle of 0.10 mrad or more. The interlayer 1H is rectangular and has a wedge angle of less than 0.10 mrad.

The distance A on the outer surface of the first laminated glass member 2H is smaller than the distance B on the outer surface of the second laminated glass member 3H. The second laminated glass member 3H has convex portions and concave portions with respect to the straight line B on the outer surface.

A laminated glass 11I shown in FIG. 10 includes a first laminated glass member 2I, an intermediate film 1I, and a second laminated glass member 3I. The first laminated glass member 2I, the intermediate film 1I, and the second laminated glass member 3I are arranged side by side in this order. The intermediate film 1I is arranged between the first laminated glass member 2I and the second laminated glass member 3I.

The intermediate film 1I is a single-layer intermediate film having a one-layer structure.

The first laminated glass member 2I is rectangular and has a wedge angle of less than 0.10 mrad. The second laminated glass member 3I is wedge-shaped and has a wedge angle of 0.10 mrad or more. Interlayer 1I is rectangular and has a wedge angle of less than 0.10 mrad.

The distance A on the outer surface of the first laminated glass member 2I is smaller than the distance B on the outer surface of the second laminated glass member 3I. The second laminated glass member 3I has a convex portion with respect to the straight line B on the outer surface.

A laminated glass 11J shown in FIG. 11 includes a first laminated glass member 2J, an intermediate film 1J, and a second laminated glass member 3J. The first laminated glass member 2J, the intermediate film 1J, and the second laminated glass member 3J are arranged side by side in this order. The intermediate film 1J is arranged between the first laminated glass member 2J and the second laminated glass member 3J.

The intermediate film 1J is a single-layer intermediate film having a one-layer structure.

The first laminated glass member 2J is wedge-shaped and has a wedge angle of 0.10 mrad or more. The second laminated glass member 3J is wedge-shaped and has a wedge angle of 0.10 mrad or more. The intermediate film 1J is wedge-shaped and has a wedge angle of 0.10 mrad or more.

The distance A on the outer surface of the first laminated glass member 2J is smaller than the distance B on the outer surface of the second laminated glass member 3J. The second laminated glass member 3J has a convex portion with respect to the straight line B on the outer surface.

A laminated glass 11K shown in FIG. 12 includes a first laminated glass member 2K, an intermediate film 1K, and a second laminated glass member 3K. The first laminated glass member 2K, the intermediate film 1K, and the second laminated glass member 3K are arranged side by side in this order. The intermediate film 1K is arranged between the first laminated glass member 2K and the second laminated glass member 3K.

The intermediate film 1K is a single-layer intermediate film having a one-layer structure.

The first laminated glass member 2K is rectangular and has a wedge angle of less than 0.10 mrad. The second laminated glass member 3K is wedge-shaped and has a wedge angle of 0.10 mrad or more. The intermediate film 1K is wedge-shaped and has a wedge angle of 0.10 mrad or more.

The outer surface of the first laminated glass member 2K satisfies the above configuration A and is a flat surface. The outer surface of the second laminated glass member 3K does not satisfy the above configuration B and is a non-flat surface. The second laminated glass member 3K has a convex portion with respect to the straight line B on the outer surface.

From the viewpoint of suppressing multiple images more effectively, the laminated glass extends from a position of 6 cm from the one end (thin side) to the other end to a position of 63.8 cm from the one end to the other end. It is preferable to have the display area in the area of . The display area may exist in a part of the area from a position of 6 cm from the one end to the other end to a position of 63.8 cm from the one end to the other end, or may exist in the entire area. You may have

The laminated glass preferably has a portion with a wedge-shaped cross section in the thickness direction. The cross-sectional shape of the display area in the thickness direction is preferably wedge-shaped. Whether it is wedge-shaped or rectangular can be determined by the cross-sectional shape in the thickness direction.

From the viewpoint of effectively suppressing multiple images, in the region from the position of 6 cm from the one end to the other end to the position of 63.8 cm from the one end to the other end, the laminated glass is preferably has a wedge-shaped cross-sectional portion. The portion having a wedge-shaped cross-sectional shape in the thickness direction may exist in a part of the region from the one end to the other end to a position of 63.8 cm from the other end, or may exist in the entire region.

The intermediate film and the laminated glass may have shade regions. The shaded area may be separated from the display corresponding area. The shade area is provided for the purpose of, for example, preventing a driver from feeling dazzled by sunlight, outdoor lighting, or the like. The shaded area may also be provided to provide heat insulation. The shaded area is preferably located at the edge of the interlayer or laminated glass. It is preferable that the shaded area is strip-shaped.

Colorants or fillers may be used in shaded areas to vary color and visible light transmission. The coloring agent or filler may be contained only in a partial region of the interlayer film in the thickness direction, or may be contained in the entire region of the interlayer film or the laminated glass in the thickness direction.

From the viewpoint of improving the display and expanding the field of view, the visible light transmittance of the display corresponding area and the display area is preferably 80% or more, more preferably 88% or more, and still more preferably 90% or more. be. It is preferable that the visible light transmittance of the display corresponding area and the display area is higher than the visible light transmittance of the shade area. The visible light transmittance of the display corresponding area and the display area may be lower than the visible light transmittance of the shade area. The visible light transmittance of the display corresponding area and the display area is preferably 50% or more, more preferably 60% or more higher than the visible light transmittance of the shade area.

In addition, for example, when the visible light transmittance is changed in the display corresponding area, the display area and the shade area, the visible Light transmittance is measured.

Using a spectrophotometer (“U-4100” manufactured by Hitachi High-Tech), the visible light transmittance at 380 to 780 nm can be measured according to JIS R3211 (1998).

The display corresponding area and the display area preferably have a length direction and a width direction. Since the intermediate film and the laminated glass are excellent in versatility, it is preferable that the width direction of the display corresponding region and the display region is the direction connecting the one end and the other end. The display corresponding area and the display area are preferably band-shaped.

The intermediate film preferably has an MD direction and a TD direction. The interlayer is obtained, for example, by melt extrusion. The MD direction is the flow direction of the interlayer during manufacture of the interlayer. The TD direction is a direction orthogonal to the flow direction of the intermediate film during manufacture of the intermediate film and a direction orthogonal to the thickness direction of the intermediate film. It is preferable that the one end and the other end are positioned on both sides in the TD direction.

Let X be the distance between one end and the other end. It is preferable that the laminated glass has a minimum thickness in a region of a distance of 0X to 0.2X inward from one end and a maximum thickness in a region of a distance of 0X to 0.2X inward from the other end. . More preferably, the laminated glass has a minimum thickness in a region of a distance of 0X to 0.1X inward from one end, and a maximum thickness in a region of a distance of 0X to 0.1X inward from the other end. preferable. Preferably, the laminated glass has a minimum thickness at one end and the laminated glass has a maximum thickness at the other end.

The laminated glass may have a uniform thickness portion. The uniform-thickness portion means that the thickness does not change by more than 10 μm per distance range of 10 cm in the direction connecting the one end and the other end of the laminated glass. Therefore, the uniform-thickness portion refers to a portion where the thickness does not change by more than 10 μm per distance of 10 cm in the direction connecting the one end and the other end of the laminated glass. Specifically, the uniform-thickness portion has no change in thickness in the direction connecting the one end and the other end of the laminated glass, or has a thickness of 10 cm in the direction connecting the one end and the other end of the laminated glass. A portion where the thickness changes by 10 μm or less per distance range.

The distance X between one end and the other end of the laminated glass is preferably 3 m or less, more preferably 2 m or less, particularly preferably 1.5 m or less, preferably 0.5 m or more, more preferably 0.8 m or more, especially It is preferably 1 m or more.

The intermediate film may be wound into a roll to form an intermediate film roll. The roll body may include a winding core and an intermediate film. The intermediate film may be wound around the outer periphery of the winding core.

The method for producing the laminated glass is not particularly limited. For example, the intermediate film is sandwiched between the first and second laminated glass members and passed through a pressing roll, or placed in a rubber bag and vacuum-sucked. As a result, air remaining between the first laminated glass member and the intermediate film and between the second laminated glass member and the intermediate film is removed. After that, pre-bonding is performed at about 70 to 110° C. to obtain a laminate. Next, the laminate is put into an autoclave or pressed to crimp at a pressure of about 120-150° C. and 1-1.5 MPa. Thus, a laminated glass can be obtained.

The laminated glass can be used for automobiles, railroad vehicles, aircraft, ships, buildings, and the like. The laminated glass is preferably a laminated glass for construction or a vehicle, and more preferably a laminated glass for a vehicle. The above laminated glass can be used for applications other than these applications. It is particularly preferred that the laminated glass is an automobile windshield.

Other details of each member constituting the laminated glass according to the present invention will be described below.

(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 intermediate layer is sandwiched between two glass plates, but also laminated glass in which an intermediate layer is sandwiched between a glass plate and a PET film or the like. Laminated glass is a laminate comprising glass plates, and preferably at least one glass plate is used. The first and second laminated glass members are glass plates or PET (polyethylene terephthalate) films, respectively, and the laminated glass includes at least one glass plate as the first and second laminated glass members. is preferred. It is particularly preferred that both the first and second laminated glass members are glass plates.

Examples of the glass plate include inorganic glass and organic glass. Examples of the inorganic glass include float plate glass, heat absorbing plate glass, heat reflecting plate glass, polished plate glass, figured glass, wired plate glass, lined plate glass, and green glass. The organic glass is a synthetic resin glass substituted for inorganic glass. Examples of the organic glass include a polycarbonate plate and a poly(meth)acrylic resin plate. Examples of the poly(meth)acrylic resin plate include a polymethyl(meth)acrylate plate.

It is preferable that each of the first laminated glass member and the second laminated glass member is clear glass or heat-absorbing sheet glass. The heat-absorbing plate glass is preferably green glass. The heat-absorbing plate glass is a heat-absorbing plate glass conforming to JIS R3208.

Each thickness 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.

The thicknesses of the first and second laminated glass members mean average thicknesses.

(intermediate film)
The thickness of the intermediate film is not particularly limited. From the viewpoint of practical use and the viewpoint of sufficiently enhancing the penetration resistance and bending rigidity of 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. It is preferably 1.5 mm or less. When the thickness of the intermediate film is at least the above lower limit, the penetration resistance and bending rigidity of the laminated glass are further enhanced. When the thickness of the intermediate film is equal to or less than the above upper limit, the transparency of the intermediate film is further improved.

The thickness of the intermediate film means an average thickness.

Let T be the thickness of the intermediate film. The thickness of the first layer is preferably 0.035T or more, more preferably 0.0625T or more, still more preferably 0.1T or more, preferably 0.4T or less, more preferably 0.375T or less, and still more preferably 0.25 T or less, particularly preferably 0.15 T or less. When the thickness of the first layer is 0.4T or less, the bending rigidity becomes even better.

Each thickness of the second layer and the third layer is preferably 0.3 T or more, more preferably 0.3125 T or more, still more preferably 0.375 T or more, preferably 0.97 T or less, more preferably 0 0.9375T or less, more preferably 0.9T or less. Each thickness of the second layer and the third layer may be 0.46875T or less, or may be 0.45T or less. Further, when each thickness of the second layer and the third layer is equal to or more than the lower limit and equal to or less than the upper limit, the rigidity and sound insulation of the laminated glass are further enhanced.

The total thickness of the second layer and the third layer is preferably 0.625 T or more, more preferably 0.75 T or more, still more preferably 0.85 T or more, preferably 0.97 T or less, more preferably It is 0.9375T or less, more preferably 0.9T or less. Further, when the total thickness of the second layer and the third layer is equal to or more than the lower limit and equal to or less than the upper limit, the rigidity and sound insulation of the laminated glass are further enhanced.

Thermoplastic resin:
The intermediate film preferably contains a thermoplastic resin (hereinafter sometimes referred to as thermoplastic resin (0)), and the thermoplastic resin (0) is polyvinyl acetal resin (hereinafter referred to as polyvinyl acetal resin (0)). may be described). The first layer preferably contains a thermoplastic resin (hereinafter sometimes referred to as thermoplastic resin (1)), and the thermoplastic resin (1) is polyvinyl acetal resin (hereinafter referred to as polyvinyl acetal resin ( 1)) is preferably included. The second layer preferably contains a thermoplastic resin (hereinafter sometimes referred to as thermoplastic resin (2)), and the thermoplastic resin (2) is polyvinyl acetal resin (hereinafter referred to as polyvinyl acetal resin ( 2)) is preferably included. The third layer preferably contains a thermoplastic resin (hereinafter sometimes referred to as thermoplastic resin (3)), and the thermoplastic resin (3) is polyvinyl acetal resin (hereinafter referred to as polyvinyl acetal resin ( 3) is preferably included. The thermoplastic resin (1), the thermoplastic resin (2), and the thermoplastic resin (3) may be the same or different. It is preferable that the thermoplastic resin (1) is different from the thermoplastic resin (2) and the thermoplastic resin (3), since the sound insulation is further enhanced. The polyvinyl acetal resin (1), the polyvinyl acetal resin (2), and the polyvinyl acetal resin (3) may be the same or different. It is preferable that the polyvinyl acetal resin (1) is different from the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3) because the sound insulation is further enhanced. Each of the thermoplastic resin (0), the thermoplastic resin (1), the thermoplastic resin (2), and the thermoplastic resin (3) may be used alone or in combination of two or more. may Each of the polyvinyl acetal resin (0), the polyvinyl acetal resin (1), the polyvinyl acetal resin (2), and the polyvinyl acetal resin (3) may be used alone or in combination of two or more. may

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

The thermoplastic resin is preferably a polyvinyl acetal resin. By using the polyvinyl acetal resin and the plasticizer together, the adhesion of the layer containing the polyvinyl acetal resin and the plasticizer to the laminated glass member or other layer is further increased.

The polyvinyl acetal resin can be produced, for example, by acetalizing polyvinyl alcohol (PVA) with an aldehyde. The polyvinyl acetal resin is preferably an acetalized product of polyvinyl alcohol. The polyvinyl alcohol is obtained, for example, by saponifying polyvinyl acetate. The degree of saponification of the polyvinyl alcohol is generally in the range of 70-99.9 mol %.

The average degree of polymerization of the polyvinyl alcohol (PVA) is preferably 200 or more, more preferably 500 or more, still more preferably 1500 or more, still more preferably 1600 or more, particularly preferably 2600 or more, most preferably 2700 or more, preferably It is 5,000 or less, more preferably 4,000 or less, and still more preferably 3,500 or less. When the average degree of polymerization is at least the lower limit, the penetration resistance of the laminated glass is further enhanced. When the average degree of polymerization is equal to or less than the upper limit, molding of the intermediate film is facilitated.

The average degree of polymerization of polyvinyl alcohol is determined by a method based on JIS K6726 "Polyvinyl alcohol test method".

The number of carbon atoms in the acetal group contained in the polyvinyl acetal resin is not particularly limited. Aldehyde used when producing the polyvinyl acetal resin is not particularly limited. The acetal group in the polyvinyl acetal resin preferably has 3 to 5 carbon atoms, more preferably 3 or 4 carbon atoms. When the number of carbon atoms in the acetal group in the polyvinyl acetal resin is 3 or more, the glass transition temperature of the intermediate film becomes sufficiently low.

The aldehyde is not particularly limited. Generally, aldehydes having 1 to 10 carbon atoms are preferably used. Examples of the aldehyde having 1 to 10 carbon atoms include propionaldehyde, n-butyraldehyde, isobutyraldehyde, n-valeraldehyde, 2-ethylbutyraldehyde, n-hexylaldehyde, n-octylaldehyde, and n-nonylaldehyde. , n-decylaldehyde, formaldehyde, acetaldehyde and benzaldehyde. Propionaldehyde, n-butyraldehyde, isobutyraldehyde, n-hexylaldehyde or n-valeraldehyde are preferred, propionaldehyde, n-butyraldehyde or isobutyraldehyde are more preferred, and n-butyraldehyde is even more preferred. Only one kind of the aldehyde may be used, or two or more kinds thereof may be used in combination.

The hydroxyl content (hydroxyl group amount) of the polyvinyl acetal resin (0) is preferably 15 mol % or more, more preferably 18 mol % or more, preferably 40 mol % or less, and more preferably 35 mol % or less. When the hydroxyl content is equal to or higher than the lower limit, the adhesive strength of the intermediate film is further increased. Further, when the content of hydroxyl groups is equal to or less than the upper limit, the flexibility of the intermediate film is increased, and the handling of the intermediate film is facilitated.

The hydroxyl content (hydroxyl group content) of the polyvinyl acetal resin (1) is preferably 17 mol% or more, more preferably 20 mol% or more, still more preferably 22 mol% or more, and more preferably 28 mol% or less. is 27 mol % or less, more preferably 25 mol % or less, particularly preferably 24 mol % or less. When the hydroxyl content is equal to or higher than the lower limit, the mechanical strength of the intermediate film is further increased. In particular, when the hydroxyl group content of the polyvinyl acetal resin (1) is 20 mol% or more, the reaction efficiency is high and the productivity is excellent. . Further, when the content of hydroxyl groups is equal to or less than the upper limit, the flexibility of the intermediate film is increased, and the handling of the intermediate film is facilitated.

Each hydroxyl group content of the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3) is preferably 25 mol% or more, more preferably 28 mol% or more, more preferably 30 mol% or more, and still more preferably 31.5 mol % or more, more preferably 32 mol % or more, particularly preferably 33 mol % or more. Each hydroxyl group content of the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3) is preferably 38 mol% or less, more preferably 37 mol% or less, still more preferably 36.5 mol% or less, and particularly preferably is 36 mol % or less. When the hydroxyl content is equal to or higher than the lower limit, the adhesive strength of the intermediate film is further increased. Further, when the content of hydroxyl groups is equal to or less than the upper limit, the flexibility of the intermediate film is increased, and the handling of the intermediate film is facilitated.

From the viewpoint of further enhancing sound insulation, the content of hydroxyl groups in the polyvinyl acetal resin (1) is preferably lower than the content of hydroxyl groups in the polyvinyl acetal resin (2). From the viewpoint of further improving sound insulation, the content of hydroxyl groups in the polyvinyl acetal resin (1) is preferably lower than the content of hydroxyl groups in the polyvinyl acetal resin (3). From the viewpoint of further improving sound insulation, the absolute value of the difference between the hydroxyl group content of the polyvinyl acetal resin (1) and the hydroxyl group content of the polyvinyl acetal resin (2) is preferably 1 mol % or more. , more preferably 5 mol % or more, still more preferably 9 mol % or more, particularly preferably 10 mol % or more, and most preferably 12 mol % or more. From the viewpoint of further improving the sound insulation, the absolute value of the difference between the hydroxyl group content of the polyvinyl acetal resin (1) and the hydroxyl group content of the polyvinyl acetal resin (3) is preferably 1 mol % or more. , more preferably 5 mol % or more, still more preferably 9 mol % or more, particularly preferably 10 mol % or more, and most preferably 12 mol % or more. The absolute value of the difference between the hydroxyl group content of the polyvinyl acetal resin (1) and the hydroxyl group content of the polyvinyl acetal resin (2), the hydroxyl group content of the polyvinyl acetal resin (1), and the The absolute value of the difference from the hydroxyl group content of the polyvinyl acetal resin (3) is preferably 20 mol % or less.

The content of hydroxyl groups in the polyvinyl acetal resin is the molar fraction obtained by dividing the amount of ethylene groups to which hydroxyl groups are bonded by the total amount of ethylene groups in the main chain, expressed as a percentage. The amount of ethylene groups to which the hydroxyl groups are bonded can be measured according to, for example, JIS K6728 "Polyvinyl butyral test method".

The degree of acetylation (acetyl group content) of the polyvinyl acetal resin (0) is preferably 0.1 mol% or more, more preferably 0.3 mol% or more, still more preferably 0.5 mol% or more, preferably 30 mol % or less, more preferably 25 mol % or less, and still more preferably 20 mol % or less. Compatibility of polyvinyl acetal resin and a plasticizer becomes it high that the said degree of acetylation is more than the said minimum. When the degree of acetylation is equal to or less than the upper limit, the interlayer film and the laminated glass have high humidity resistance.

The degree of acetylation (acetyl group content) of the polyvinyl acetal resin (1) is preferably 0.01 mol% or more, more preferably 0.1 mol% or more, still more preferably 7 mol% or more, still more preferably 9 mol % or more, preferably 30 mol % or less, more preferably 25 mol % or less, still more preferably 24 mol % or less, and particularly preferably 20 mol % or less. Compatibility of polyvinyl acetal resin and a plasticizer becomes it high that the said degree of acetylation is more than the said minimum. When the degree of acetylation is equal to or less than the upper limit, the interlayer film and the laminated glass have high humidity resistance. In particular, when the degree of acetylation of the polyvinyl acetal resin (1) is 0.1 mol % or more and 25 mol % or less, the penetration resistance is excellent.

The degree of acetylation of the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3) is preferably 0.01 mol% or more, more preferably 0.5 mol% or more, and more preferably 10 mol% or less. is 2 mol % or less. Compatibility of polyvinyl acetal resin and a plasticizer becomes it high that the said degree of acetylation is more than the said minimum. When the degree of acetylation is equal to or less than the upper limit, the interlayer film and the laminated glass have high humidity resistance.

The degree of acetylation is the molar fraction obtained by dividing the amount of ethylene groups to which acetyl groups are bonded by the total amount of ethylene groups in the main chain, expressed as a percentage. The amount of ethylene groups to which the acetyl groups are bonded can be measured according to, for example, JIS K6728 "Polyvinyl butyral test method".

The degree of acetalization of the polyvinyl acetal resin (0) (degree of butyralization in the case of polyvinyl butyral resin) is preferably 60 mol% or more, more preferably 63 mol% or more, preferably 85 mol% or less, and more preferably It is 75 mol % or less, more preferably 70 mol % or less. Compatibility of polyvinyl acetal resin and a plasticizer becomes it high that the said degree of acetalization is more than the said minimum. When the degree of acetalization is equal to or less than the upper limit, the reaction time required for producing the polyvinyl acetal resin is shortened.

The degree of acetalization of the polyvinyl acetal resin (1) (degree of butyralization in the case of polyvinyl butyral resin) is preferably 47 mol% or more, more preferably 60 mol% or more, preferably 85 mol% or less, and more preferably 80 mol % or less, more preferably 75 mol % or less. Compatibility of polyvinyl acetal resin and a plasticizer becomes it high that the said degree of acetalization is more than the said minimum. When the degree of acetalization is equal to or less than the upper limit, the reaction time required for producing the polyvinyl acetal resin is shortened.

The degree of acetalization (degree of butyralization in the case of polyvinyl butyral resin) of the polyvinyl acetal resin (2) and the polyvinyl acetal resin (3) is preferably 55 mol% or more, more preferably 60 mol% or more. is 75 mol % or less, more preferably 71 mol % or less. Compatibility of polyvinyl acetal resin and a plasticizer becomes it high that the said degree of acetalization is more than the said minimum. When the degree of acetalization is equal to or less than the upper limit, the reaction time required for producing the polyvinyl acetal resin is shortened.

The degree of acetalization is the total amount of ethylene groups in the main chain minus the amount of ethylene groups to which hydroxyl groups are bonded and the amount of ethylene groups to which acetyl groups are bonded. It is a value showing the mole fraction obtained by dividing by the percentage.

The hydroxyl content (hydroxyl group amount), the degree of acetalization (degree of butyralization) and the degree of acetylation are preferably calculated from the results of measurements according to JIS K6728 "Polyvinyl butyral test method". However, measurement according to ASTM D1396-92 may be used. When the polyvinyl acetal resin is a polyvinyl butyral resin, the hydroxyl content (hydroxyl group amount), the degree of acetalization (degree of butyralization), and the degree of acetylation are determined according to JIS K6728 "Polyvinyl butyral test method". can be calculated from the results measured by

Plasticizer:
From the viewpoint of further increasing the adhesive strength of the intermediate film, the intermediate film preferably contains a plasticizer (hereinafter sometimes referred to as plasticizer (0)). The first layer preferably contains a plasticizer (hereinafter sometimes referred to as plasticizer (1)). The second layer preferably contains a plasticizer (hereinafter sometimes referred to as plasticizer (2)). The third layer preferably contains a plasticizer (hereinafter sometimes referred to as plasticizer (3)). When the thermoplastic resin contained in the intermediate film is a polyvinyl acetal resin, it is particularly preferred that the intermediate film (each layer) contains a plasticizer. The layer containing polyvinyl acetal resin preferably contains a plasticizer.

The plasticizer is not particularly limited. Conventionally known plasticizers can be used as the plasticizer. Only one type of the plasticizer may be used, or two or more types may be used in combination.

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. Preferably, the plasticizer is a liquid plasticizer.

Examples of the monobasic organic acid esters include glycol esters obtained by reacting a glycol with a monobasic organic acid. Examples of the glycol include triethylene glycol, tetraethylene glycol and tripropylene glycol. Examples of the monobasic organic acids include butyric acid, isobutyric acid, caproic acid, 2-ethylbutyric acid, heptylic acid, n-octylic acid, 2-ethylhexylic acid, n-nonylic acid and decylic acid.

Examples of the polybasic organic acid esters include ester compounds of polybasic organic acids and alcohols having a linear or branched structure having 4 to 8 carbon atoms. Examples of the polybasic organic acids include adipic acid, sebacic acid and azelaic acid.

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, diethylene glycol di-2-ethylbutyrate, diethylene glycol di-2-ethylhexanoate, dipropylene glycol Di-2-ethylbutyrate, triethylene glycol di-2-ethylpentanoate, tetraethylene glycol di-2-ethylbutyrate, diethylene glycol dicaprylate, dihexyl adipate, dioctyl adipate, hexyl cyclohexyl adipate, adipine Mixtures of heptyl acid and nonyl adipate, diisononyl adipate, diisodecyl adipate, heptyl nonyl adipate, dibutyl sebacate, oil-modified alkyd sebacate, mixtures of phosphate and adipate, and the like. Organic ester plasticizers other than these may be used. Other adipic acid esters than those mentioned above may be used.

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

The plasticizer is preferably a diester plasticizer represented by the following formula (1).

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. . Each of R1 and R2 in the above formula (1) is preferably an organic group having 6 to 10 carbon atoms.

The plasticizer preferably contains triethylene glycol di-2-ethylhexanoate (3GO) or triethylene glycol di-2-ethylbutyrate (3GH), and triethylene glycol di-2-ethylhexanoate It is more preferable to include

In the interlayer film, the content of the plasticizer (0) with respect to 100 parts by weight of the thermoplastic resin (0) is defined as content (0). The content (0) is preferably 25 parts by weight or more, more preferably 30 parts by weight or more, preferably 100 parts by weight or less, more preferably 60 parts by weight or less, and still 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 enhanced. When the content (0) is equal to or less than the upper limit, the transparency of the intermediate film is further enhanced.

In the first layer, the content of the plasticizer (1) with respect to 100 parts by weight of the thermoplastic resin (1) is defined as content (1). The content (1) is preferably 50 parts by weight or more, more preferably 55 parts by weight or more, still more preferably 60 parts by weight or more, preferably 100 parts by weight or less, more preferably 90 parts by weight or less, and still more preferably 85 parts by weight. It is not more than 80 parts by weight, particularly preferably not more than 80 parts by weight. When the content (1) is equal to or higher than the lower limit, the flexibility of the intermediate film increases, and the handling of the intermediate film becomes easy. When the content (1) is equal to or less than the upper limit, the penetration resistance of the laminated glass is further enhanced.

In the second layer, the content of the plasticizer (2) with respect to 100 parts by weight of the thermoplastic resin (2) is referred to as content (2). In the third layer, the content (3) is defined as the content of the plasticizer (3) with respect to 100 parts by weight of the thermoplastic resin (3). Each of the content (2) and the content (3) is preferably 10 parts by weight or more, more preferably 15 parts by weight or more, still more preferably 20 parts by weight or more, particularly preferably 24 parts by weight or more, preferably 40 parts by weight or more. It is not more than 35 parts by weight, more preferably not more than 32 parts by weight, and particularly preferably not more than 30 parts by weight. When the content (2) and the content (3) are at least the lower limit, the flexibility of the intermediate film is increased, and the handling of the intermediate film is facilitated. When the content (2) and the content (3) are equal to or less than the upper limit, the penetration resistance of the laminated glass is further enhanced.

In order to improve the sound insulation of the laminated glass, the content (1) is preferably greater than the content (2), and the content (1) is preferably greater than the content (3).

From the viewpoint of further enhancing the sound insulation of the laminated glass, the absolute value of the difference between the content (2) and the content (1), and the difference between the content (3) and the content (1) is preferably 10 parts by weight or more, more preferably 15 parts by weight or more, and still more preferably 20 parts by weight or more. The absolute value of the difference between the content (2) and the content (1) and the absolute value of the difference between the content (3) and the content (1) are preferably 80 parts by weight or less, More preferably 75 parts by weight or less, still more preferably 70 parts by weight or less.

Thermal insulation material:
The intermediate film preferably contains a heat shielding substance. The first layer preferably contains a heat shielding substance. The second layer preferably contains a heat shielding substance. The third layer preferably contains a heat shielding substance. Only one type of the above heat shielding substance may be used, or two or more types may be used in combination.

Preferably, the heat shielding material contains at least one component X selected from phthalocyanine compounds, naphthalocyanine compounds and anthracyanine compounds, or heat shielding particles. In this case, both the component X and the heat-shielding particles may be included.

The intermediate film preferably contains at least one component X selected from phthalocyanine compounds, naphthalocyanine compounds and anthracyanine compounds. The first layer preferably contains the component X described above. The second layer preferably contains the component X described above. The third layer preferably contains the component X. The above component X is a heat shielding substance. As for the component X, only one type may be used, or two or more types may be used in combination.

The above component X is not particularly limited. As component X, conventionally known phthalocyanine compounds, naphthalocyanine compounds and anthracyanine compounds can be used.

Examples of the component X include phthalocyanine, phthalocyanine derivatives, naphthalocyanine, naphthalocyanine derivatives, anthracyanine, and anthracyanine derivatives. Each of the phthalocyanine compound and the phthalocyanine derivative preferably has a phthalocyanine skeleton. Each of the naphthalocyanine compound and the naphthalocyanine derivative preferably has a naphthalocyanine skeleton. Each of the anthracyanine compound and the anthracyanine derivative preferably has an anthracyanine skeleton.

From the viewpoint of further increasing the heat shielding properties of the interlayer film and the laminated glass, the component X is preferably at least one selected from the group consisting of phthalocyanine, phthalocyanine derivatives, naphthalocyanine, and naphthalocyanine derivatives. , phthalocyanine and derivatives of phthalocyanine.

From the viewpoint of effectively increasing the heat shielding property and maintaining the visible light transmittance at a higher level for a long period of time, the component X preferably contains vanadium atoms or copper atoms. The component X preferably contains vanadium atoms, and also preferably contains copper atoms. More preferably, the component X is at least one of phthalocyanines containing vanadium atoms or copper atoms and derivatives of phthalocyanines containing vanadium atoms or copper atoms. From the viewpoint of further increasing the heat shielding properties of the interlayer film and the laminated glass, the component X preferably has a structural unit in which an oxygen atom is bonded to a vanadium atom.

The content of the component X in 100% by weight of the intermediate film or in 100% by weight of the layer (first layer, second layer or third layer) containing the component X is preferably 0.001% by weight. As mentioned above, it is more preferably 0.005% by weight or more, still more preferably 0.01% by weight or more, and particularly preferably 0.02% by weight or more. The content of the component X in 100% by weight of the intermediate film or in 100% by weight of the layer (first layer, second layer or third layer) containing the component X is preferably 0.2% by weight. Below, it is more preferably 0.1% by weight or less, still more preferably 0.05% by weight or less, and particularly preferably 0.04% by weight or less. When the content of component X is equal to or more than the lower limit and equal to or less than the upper limit, the heat shielding property is sufficiently high, and the visible light transmittance is sufficiently high. For example, it is possible to increase the visible light transmittance to 70% or more.

The intermediate film preferably contains heat shielding particles. The first layer preferably contains the heat shielding particles. The second layer preferably contains the heat shielding particles. The third layer preferably contains the heat shielding particles. The heat-shielding particles are a heat-shielding substance. Infrared rays (heat rays) can be effectively blocked by using heat shielding particles. Only one type of the heat-shielding particles may be used, or two or more types may be used in combination.

From the viewpoint of further enhancing the heat shielding properties of the laminated glass, the heat shielding particles are more preferably metal oxide particles. The heat-shielding particles are preferably particles (metal oxide particles) formed of a metal oxide.

Infrared rays with a wavelength of 780 nm or longer, which is longer than visible light, have a smaller amount of energy than ultraviolet rays. However, infrared rays have a large thermal effect, and when infrared rays are absorbed by substances, they are released as heat. For this reason, infrared rays are generally called heat rays. By using the heat-shielding particles, infrared rays (heat rays) can be effectively blocked. The heat-shielding particles mean particles capable of absorbing infrared rays.

Specific examples of the heat shielding particles include aluminum-doped tin oxide particles, indium-doped tin oxide particles, antimony-doped tin oxide particles (ATO particles), gallium-doped zinc oxide particles (GZO particles), and indium-doped zinc oxide particles (IZO particles). ), aluminum-doped zinc oxide particles (AZO particles), niobium-doped titanium oxide particles, sodium-doped tungsten oxide particles, cesium-doped tungsten oxide particles, thallium-doped tungsten oxide particles, rubidium-doped tungsten oxide particles, tin-doped indium oxide particles (ITO particles) , tin-doped zinc oxide particles and silicon-doped zinc oxide particles, and lanthanum hexaboride (LaB ₆ ) particles. Heat shielding particles other than these may be used. Metal oxide particles are preferred because they have a high heat ray shielding function, ATO particles, GZO particles, IZO particles, ITO particles or tungsten oxide particles are more preferred, ATO particles, ITO particles or tungsten oxide particles are even more preferred, and ITO particles or Tungsten oxide particles are particularly preferred. In particular, tin-doped indium oxide particles (ITO particles) are preferred, and tungsten oxide particles are also preferred, since they have a high heat ray shielding function and are easily available.

The tungsten oxide particles are preferably metal-doped tungsten oxide particles from the viewpoint of further increasing the heat shielding properties of the interlayer film and the laminated glass. The above "tungsten oxide particles" include metal-doped tungsten oxide particles. Specific examples of the metal-doped tungsten oxide particles include sodium-doped tungsten oxide particles, cesium-doped tungsten oxide particles, thallium-doped tungsten oxide particles, and rubidium-doped tungsten oxide particles.

Cesium-doped tungsten oxide particles are particularly preferred from the viewpoint of further increasing the heat shielding properties of the interlayer film and the laminated glass. The cesium-doped tungsten oxide particles are preferably tungsten oxide particles represented by the formula: Cs _0.33 WO ₃ from the viewpoint of further enhancing the heat shielding properties of the interlayer film and the laminated glass.

The average particle size of the heat shielding particles is preferably 0.01 μm or more, more preferably 0.02 μm or more, preferably 0.1 μm or less, and more preferably 0.05 μm or less. If the average particle size is at least the above lower limit, the heat ray shielding property will be sufficiently high. When the average particle size is equal to or less than the above upper limit, the dispersibility of the heat shielding particles is enhanced.

The above "average particle size" indicates the volume average particle size. The average particle size can be measured using a particle size distribution analyzer (“UPA-EX150” manufactured by Nikkiso Co., Ltd.) or the like.

The content of the heat shielding particles in 100% by weight of the intermediate film or in 100% by weight of the layer (first layer, second layer or third layer) containing the heat shielding particles is preferably 0.01. % by weight or more, more preferably 0.1% by weight or more, still more preferably 1% by weight or more, and particularly preferably 1.5% by weight or more. The content of the heat shielding particles in 100% by weight of the intermediate film or in 100% by weight of the layer (first layer, second layer or third layer) containing the heat shielding particles is preferably 6% by weight. 5.5% by weight or less, more preferably 4% by weight or less, particularly preferably 3.5% by weight or less, and most preferably 3% by weight or less. When the content of the heat-shielding particles is at least the lower limit and not more than the upper limit, the heat-shielding properties are sufficiently high, and the visible light transmittance is sufficiently high.

Metal salt:
The intermediate film preferably contains at least one metal salt among alkali metal salts, alkaline earth metal salts and magnesium salts (hereinafter sometimes referred to as metal salt M). The first layer preferably contains the metal salt M described above. The second layer preferably contains the metal salt M described above. The third layer preferably contains the metal salt M described above. The use of the metal salt M makes it easy to control the adhesion between the interlayer and a laminated glass member such as a glass plate or the adhesion between the layers in the interlayer. Only one kind of the metal salt M may be used, or two or more kinds thereof may be used in combination.

The metal salt M preferably contains at least one metal selected from the group consisting of Li, Na, K, Rb, Cs, Mg, Ca, Sr and Ba. The metal salt contained in the intermediate film preferably contains at least one of K and Mg.

The metal salt M is an alkali metal salt of an organic acid having 2 to 16 carbon atoms, an alkaline earth metal salt of an organic acid having 2 to 16 carbon atoms, or a magnesium salt of an organic acid having 2 to 16 carbon atoms. is more preferred, and a magnesium salt of a carboxylic acid having 2 to 16 carbon atoms or a potassium salt of a carboxylic acid having 2 to 16 carbon atoms is more preferred.

Examples of the magnesium salt of a carboxylic acid having 2 to 16 carbon atoms and the potassium salt of a carboxylic acid having 2 to 16 carbon atoms include magnesium acetate, potassium acetate, magnesium propionate, potassium propionate, magnesium 2-ethylbutyrate, and 2-ethylbutanoic acid. potassium, magnesium 2-ethylhexanoate and potassium 2-ethylhexanoate;

The total content of Mg and K in the intermediate film containing the metal salt M or the layer containing the metal salt M (the first layer, the second layer, or the third layer) is preferably 5 ppm or more, and more It is preferably 10 ppm or more, more preferably 20 ppm or more, preferably 300 ppm or less, more preferably 250 ppm or less, still more preferably 200 ppm or less. When the total content of Mg and K is not less than the above lower limit and not more than the above upper limit, the adhesiveness between the intermediate film and the glass plate or the adhesiveness between the layers in the intermediate film can be controlled even better.

UV shielding agent:
The intermediate film preferably contains an ultraviolet shielding agent. The first layer preferably contains an ultraviolet shielding agent. The second layer preferably contains an ultraviolet shielding agent. The third layer preferably contains an ultraviolet shielding agent. The use of the ultraviolet shielding agent makes it more difficult for the visible light transmittance to decrease even if the interlayer film and the laminated glass are used for a long period of time. Only one type of the ultraviolet shielding agent may be used, or two or more types may be used in combination.

The ultraviolet shielding agent includes an ultraviolet absorber. The ultraviolet shielding agent is preferably an ultraviolet absorber.

Examples of the ultraviolet shielding agent include an ultraviolet shielding agent containing a metal atom, an ultraviolet shielding agent containing a metal oxide, an ultraviolet shielding agent having a benzotriazole structure (benzotriazole compound), and an ultraviolet shielding agent having a benzophenone structure (benzophenone compound ), an ultraviolet shielding agent having a triazine structure (triazine compound), an ultraviolet shielding agent having a malonic ester structure (malonic acid ester compound), an ultraviolet shielding agent having an oxalic acid anilide structure (oxalic acid anilide compound) and a benzoate structure UV shielding agents (benzoate compounds) and the like can be mentioned.

Examples of the ultraviolet shielding agent containing the metal atom include platinum particles, particles obtained by coating the surfaces of platinum particles with silica, palladium particles, and particles obtained by coating the surfaces of palladium particles with silica. It is preferred that the UV shielding agent is not heat shielding particles.

The ultraviolet shielding agent is preferably an ultraviolet shielding agent having a benzotriazole structure, an ultraviolet shielding agent having a benzophenone structure, an ultraviolet shielding agent having a triazine structure, or an ultraviolet shielding agent having a benzoate structure. The ultraviolet shielding agent is more preferably an ultraviolet shielding agent having a benzotriazole structure or an ultraviolet shielding agent having a benzophenone structure, and more preferably an ultraviolet shielding agent having a benzotriazole structure.

Examples of the ultraviolet shielding agent containing the metal oxide include zinc oxide, titanium oxide and cerium oxide. Furthermore, the surface of the ultraviolet shielding agent containing the metal oxide may be coated. Examples of coating materials for the surface of the ultraviolet shielding agent containing the metal oxide include insulating metal oxides, hydrolyzable organosilicon compounds and silicone compounds.

Examples of the insulating metal oxide include silica, alumina and zirconia. The insulating metal oxide has a bandgap energy of, for example, 5.0 eV or more.

Examples of the ultraviolet shielding agent having the benzotriazole structure include 2-(2'-hydroxy-5'-methylphenyl)benzotriazole ("TinuvinP" manufactured by BASF), 2-(2'-hydroxy-3', 5'-di-t-butylphenyl)benzotriazole (BASF "Tinuvin320"), 2-(2'-hydroxy-3'-t-butyl-5-methylphenyl)-5-chlorobenzotriazole (BASF "Tinuvin 326" manufactured by BASF), and 2-(2'-hydroxy-3',5'-di-amylphenyl)benzotriazole ("Tinuvin 328" manufactured by BASF). The ultraviolet shielding agent is preferably an ultraviolet shielding agent having a benzotriazole structure containing a halogen atom because it has excellent ultraviolet shielding performance, and is preferably an ultraviolet shielding agent having a benzotriazole structure containing a chlorine atom. more preferred.

Examples of the ultraviolet shielding agent having the benzophenone structure include octabenzone (“Chimassorb 81” manufactured by BASF).

Examples of the UV shielding agent having a triazine structure include "LA-F70" manufactured by ADEKA and 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-[(hexyl) oxy]-phenol (“Tinuvin 1577FF” manufactured by BASF) and the like.

Examples of the ultraviolet shielding agent having a malonic acid ester structure include dimethyl 2-(p-methoxybenzylidene)malonate, tetraethyl-2,2-(1,4-phenylenedimethylidene)bismalonate, and 2-(p-methoxybenzylidene). -bis(1,2,2,6,6-pentamethyl-4-piperidinyl)malonate and the like.

Commercially available UV shielding agents having a malonic acid ester structure include Hostavin B-CAP, Hostavin PR-25 and Hostavin PR-31 (all manufactured by Clariant).

Examples of the ultraviolet shielding agent having the oxalic acid anilide structure include N-(2-ethylphenyl)-N'-(2-ethoxy-5-t-butylphenyl)oxalic acid diamide, N-(2-ethylphenyl)- N'-(2-ethoxy-phenyl) oxalic acid diamide, 2-ethyl-2'-ethoxy-oxyanilide ("Sanduvor VSU" manufactured by Clariant Co.), and other oxalic acid diamides having an aryl group substituted on the nitrogen atom types are mentioned.

Examples of the ultraviolet shielding agent having a benzoate structure include 2,4-di-tert-butylphenyl-3,5-di-tert-butyl-4-hydroxybenzoate ("Tinuvin 120" manufactured by BASF). .

The content of the ultraviolet shielding agent in 100% by weight of the intermediate film or in 100% by weight of the layer (first layer, second layer or third layer) containing the ultraviolet shielding agent is preferably 0.1. % by weight or more, more preferably 0.2% by weight or more, still more preferably 0.3% by weight or more, and particularly preferably 0.5% by weight or more. The content of the ultraviolet shielding agent in 100% by weight of the intermediate film or in 100% by weight of the layer (first layer, second layer or third layer) containing the ultraviolet shielding agent is preferably 2.5%. % by weight or less, more preferably 2% by weight or less, still more preferably 1% by weight or less, and particularly preferably 0.8% by weight or less. When the content of the ultraviolet shielding agent is equal to or more than the lower limit and equal to or less than the upper limit, the decrease in visible light transmittance after the period has elapsed can be further suppressed. In particular, the content of the ultraviolet shielding agent in 100% by weight of the layer containing the ultraviolet shielding agent is 0.2% by weight or more, so that the visible light transmittance of the interlayer film and the laminated glass after a period of time does not decrease. can be conspicuously suppressed.

Antioxidant:
The intermediate film preferably contains an antioxidant. The first layer preferably contains an antioxidant. The second layer preferably contains an antioxidant. The third layer preferably contains an antioxidant. Only one kind of the antioxidant may be used, or two or more kinds thereof may be used in combination.

Examples of the antioxidant include phenol antioxidants, sulfur antioxidants, phosphorus antioxidants, and the like. The phenol-based antioxidant is an antioxidant having a phenol skeleton. The sulfur-based antioxidant is an antioxidant containing a sulfur atom. The phosphorus antioxidant is an antioxidant containing a phosphorus atom.

The antioxidant is preferably a phenolic antioxidant or a phosphorus antioxidant.

Examples of the phenolic antioxidant include 2,6-di-t-butyl-p-cresol (BHT), butylhydroxyanisole (BHA), 2,6-di-t-butyl-4-ethylphenol, stearyl- β-(3,5-di-t-butyl-4-hydroxyphenyl)propionate, 2,2′-methylenebis-(4-methyl-6-butylphenol), 2,2′-methylenebis-(4-ethyl-6 -t-butylphenol), 4,4′-butylidene-bis-(3-methyl-6-t-butylphenol), 1,1,3-tris-(2-methyl-hydroxy-5-t-butylphenyl)butane , tetrakis[methylene-3-(3′,5′-butyl-4-hydroxyphenyl)propionate]methane, 1,3,3-tris-(2-methyl-4-hydroxy-5-t-butylphenol)butane, 1,3,5-trimethyl-2,4,6-tris(3,5-di-t-butyl-4-hydroxybenzyl)benzene, bis(3,3'-t-butylphenol)butyric acid glycol ester and bis(3-t-butyl-4-hydroxy-5-methylbenzenepropanoic acid)ethylenebis(oxyethylene). One or more of these antioxidants are preferably used.

Examples of the phosphorus antioxidant include tridecyl phosphite, tris(tridecyl) phosphite, triphenyl phosphite, trinonylphenyl phosphite, bis(tridecyl) pentaerythritol diphosphite, bis(decyl) pentaerythritol diphosphite. Phyto, tris(2,4-di-t-butylphenyl)phosphite, bis(2,4-di-t-butyl-6-methylphenyl)ethyl ester phosphorous acid, and 2,2′-methylenebis(4 ,6-di-t-butyl-1-phenyloxy)(2-ethylhexyloxy) phosphorous and the like. One or more of these antioxidants are preferably used.

Examples of commercially available antioxidants include "IRGANOX 245" manufactured by BASF, "IRGAFOS 168" manufactured by BASF, "IRGAFOS 38" manufactured by BASF, "Sumilizer BHT" manufactured by Sumitomo Chemical Co., Ltd., manufactured by Sakai Chemical Industry Co., Ltd. "H-BHT", and "IRGANOX 1010" manufactured by BASF.

In order to maintain high visible light transmittance of the interlayer film and the laminated glass for a long period of time, 100% by weight of the interlayer film or a layer containing an antioxidant (first layer, second layer or third layer ), the content of the antioxidant is preferably 0.1% by weight or more in 100% by weight. Further, since the effect of adding the antioxidant is saturated, the content of the antioxidant in 100% by weight of the intermediate film or in 100% by weight of the layer containing the antioxidant is preferably 2% by weight or less. .

Other Ingredients:
The intermediate film, the first layer, the second layer, and the third layer each optionally contain a coupling agent, a dispersant, a surfactant, a flame retardant, an antistatic agent, a pigment, and a dye. , an adhesive strength modifier other than the metal salt, a moisture resistant agent, a fluorescent whitening agent, an infrared absorbing agent, and other additives. Only one of these additives may be used, or two or more thereof may be used in combination.

(Method for using laminated glass, head-up display system, and method for manufacturing head-up display system)
The laminated glass can be attached to an opening between an outer space and an inner space into which heat rays are incident from the outer space.

When using the laminated glass, in the vehicle, the first laminated glass member is positioned on the exterior space side, and the second laminated glass member is positioned on the interior space side. The laminated glass is attached to the opening.

Specifically, the laminated glass is attached to the opening so that the first laminated glass member is positioned on the exterior space side and the second laminated glass member is positioned on the interior space side. That is, the laminated glass is attached so as to be arranged in the order of external space/first laminated glass member/intermediate film/second laminated glass member/internal space.

The head-up display system includes the laminated glass, a wiper for draining water from the laminated glass, and a light source device for irradiating the laminated glass with light for image display. The light source device can be attached to a dashboard of a vehicle, for example. An image can be displayed by irradiating the display region of the laminated glass with light from the light source device. In the vehicle, the above-described laminated glass is placed in the opening so that the first laminated glass member is positioned on the exterior space side and the second laminated glass member is positioned on the interior space side. A head-up display system can be manufactured by performing the step of attaching to the head-up display system.

In a head-up display system, the wiper is brought into contact with the outer surface of the first laminated glass member. Since the outer surface of the first laminated glass member has excellent flatness, the wiper can be satisfactorily fitted along the outer surface of the first laminated glass member.

The above-mentioned laminated glass is suitably used for windshields of vehicles.

1, 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I, 1J, 1K... Intermediate films 2, 2A, 2B, 2C, 2D, 2E, 2F, 2G, 2H, 2I, 2J, 2K... First laminated glass members 3, 3A, 3B, 3C, 3D, 3E, 3F, 3G, 3H, 3I, 3J, 3K... Second laminated glass members 11, 11A, 11B, 11C, 11D, 11E, 11F, 11G, 11H, 11I, 11J, 11K Laminated glass 11a One end 11b The other end 21, 21A, 21B, 21C, 21D, 21E First layer 22, 22A, 22B, 22C, 22D, 22E Second layer Layers 23, 23A, 23B, 23C, 23D, 23E... the third layer

Claims (12)

Having one end and the other end opposite to the one end having a thickness greater than that of the one end,
A first laminated glass member, a second laminated glass member, and an interlayer disposed between the first laminated glass member and the second laminated glass member,
The second laminated glass member has a wedge angle of 0.1 mrad or more,
The second laminated glass member has, on its outer surface , convex portions and concave portions with respect to the following straight line B,
Laminated glass, wherein the following distance A on the outer surface of the first laminated glass member is smaller than the following distance B on the outer surface of the second laminated glass member.
Distance A: In the cross section of the laminated glass in the thickness direction, the first end of the outer surface of the first laminated glass member positioned on the one end side of the laminated glass and the distance between the other end of the laminated glass A straight line A connecting the second end of the outer surface of the first laminated glass member is drawn. A distance A is defined as the distance from the straight line A to the farthest point on the outer surface of the first laminated glass member.
Distance B: In the cross section of the laminated glass in the thickness direction, the first end of the outer surface of the second laminated glass member positioned on the one end side of the laminated glass and the distance between the first end on the other end side of the laminated glass A straight line B connecting the second end of the outer surface of the second laminated glass member is drawn. A distance B is defined as the distance from the straight line B to the farthest point on the outer surface of the second laminated glass member. The laminated glass according to claim 1, wherein the maximum thickness of said second laminated glass member is greater than the maximum thickness of said first laminated glass member. The laminated glass according to claim 1 or 2, wherein the wedge angle of the second laminated glass member is larger than the wedge angle of the intermediate film. The laminated glass according to claim 3, wherein the wedge angle of the second laminated glass member is greater than the wedge angle of the intermediate film by 0.10 mrad or more. The laminated glass according to any one of claims 1 to 4, wherein said interlayer has a wedge angle of less than 0.10 mrad. The laminated glass according to any one of claims 1 to 5, wherein the intermediate film has a wedge angle of 0.10 mrad or more. Laminated glass that is a head-up display,
The laminated glass according to any one of claims 1 to 6, which has a display area for a head-up display. The laminated glass according to any one of claims 1 to 7, wherein the intermediate film contains a thermoplastic resin. The laminated glass according to any one of claims 1 to 8, wherein said interlayer contains a plasticizer. The laminated glass according to any one of claims 1 to 9, wherein the intermediate film comprises a first layer and a second layer arranged on the first surface side of the first layer. 11. Laminated glass according to claim 10, wherein the interlayer comprises a third layer disposed on a second surface side of the first layer opposite the first surface. An opening between an external space and an internal space into which heat rays are incident from the external space, a wiper for draining water from the laminated glass, and a light source device for irradiating the laminated glass with light for image display. in a vehicle that has
12. The glass according to any one of claims 1 to 11, wherein the first laminated glass member is positioned on the exterior space side, and the second laminated glass member is positioned on the interior space side. A step of attaching the laminated glass of
A method for manufacturing a head-up display system, wherein the wiper is brought into contact with the outer surface of the first laminated glass member.

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