Interlayer film for laminated glass and laminated glass

Abstract

The present invention provides an interlayer film for laminated glass capable of obtaining a laminated glass having excellent appearance integration. The interlayer film for laminated glass of the present invention has one end and the other end, and when the interlayer film is arranged between two pieces of transparent glass based on JIS R3202:1996 to obtain a laminated glass X, the interlayer film has a colored region of the laminated glass X having a visible light transmittance of 1 to 50%, the colored region has a planar area of 95% or more in the total planar area of 100% of the interlayer film, the first visible light transmittance of the laminated glass X at a position 5 cm from the one end toward the other end of the interlayer film is less than the second visible light transmittance of the laminated glass X at a position 5 cm from the other end toward the one end of the interlayer film, the first visible light transmittance is 1 to 20%, the second visible light transmittance is 5 to 50%, and the absolute value of the difference between the first visible light transmittance and the second visible light transmittance is 2 to 45%.

Description

Technical Field

[0001] This invention relates to an interlayer for laminated glass used in obtaining laminated glass. Furthermore, this invention relates to laminated glass using the aforementioned interlayer for laminated glass. Background Technology

[0002] Laminated glass is known as a type of laminated glass in which an interlayer film is sandwiched between two glass panes. This type of laminated glass is widely used in automobiles, railway vehicles, airplanes, ships, and buildings. In recent years, there has been a demand for laminated glass with privacy protection for both building and automotive applications. Privacy-protecting laminated glass, for example, includes areas that allow light to pass through but prevent the naked eye from visually identifying people or objects behind the glass.

[0003] As an example of privacy-protecting laminated glass, Patent Document 1 discloses a laminated glass using a multilayer interlayer film with an opaque layer. In this laminated glass, privacy is achieved by the opaque layer, which makes it impossible for a person or object behind the laminated glass to see it with the naked eye.

[0004] Patent Document 2 disclosed below discloses laminated glass using an interlayer having a dark portion, a gradient portion, and a transparent portion.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: WO2006 / 082800A1

[0008] Patent Document 2: WO2014 / 077328A1 Summary of the Invention

[0009] The technical problem solved by the invention

[0010] With advancements in laminated glass design technology, its applications have diversified. Furthermore, rear windshields and sunroofs are known examples of laminated glass. Moreover, as a new example of laminated glass, a rear windshield and sunroof integrated glass system is envisioned, where the rear windshield and sunroof are integrated into one unit, or where they appear to be a single unit.

[0011] In recent years, the appearance design of sunroof glass, rear windshield glass, and integrated rear windshield and sunroof glass has been further improved.

[0012] However, the laminated glass described in Patent Document 1 has a low degree of aesthetic design because it has the same color on the entire surface of the glass.

[0013] The interlayer film described in Patent Document 2 has a gradient pattern, which improves the appearance design. However, in this interlayer film, since the colored and uncolored areas are clearly separated and can be seen with the naked eye, the laminated glass cannot be visually inspected as a whole.

[0014] The object of this invention is to provide an interlayer film for laminated glass that provides excellent appearance integrity. Furthermore, the object of this invention is to provide laminated glass with excellent appearance integrity.

[0015] Technical means to solve the problem

[0016] According to a broad aspect of the present invention, an interlayer film (hereinafter, sometimes referred to as an interlayer film) for laminated glass can be provided, which is an interlayer film for laminated glass having one end and another end located on the opposite side of said one end, wherein when the interlayer film is disposed between two pieces of transparent glass based on JIS R3202:1996 to obtain laminated glass X, the interlayer film has a colored region in which the visible light transmittance of said laminated glass X is 1% to 50%, and the colored region accounts for 95% or more of the total planar area of ​​the interlayer film, and the first visible light transmittance of said laminated glass X at a position 5 cm from said one end toward said other end is less than the second visible light transmittance of said laminated glass X at a position 5 cm from said other end toward said one end, the first visible light transmittance is 1% to 20%, the second visible light transmittance is 5% to 50%, and the absolute value of the difference between the first visible light transmittance and the second visible light transmittance is 2% to 45%.

[0017] In a particular embodiment of the intermediate film of the present invention, the planar area of ​​the colored region is 100% of the total planar area of ​​the intermediate film.

[0018] In a particular embodiment of the interlayer film of the present invention, the maximum absolute value of the percentage change in visible light transmittance of the laminated glass X in the colored region from one end of the interlayer film toward the other end is less than 4.5% / mm.

[0019] In a particular embodiment of the interlayer film of the present invention, the colored region has a first non-gradient region in which the visible light transmittance of the laminated glass X is uniform from one end of the interlayer film toward the other end, and a second non-gradient region in which the visible light transmittance of the laminated glass X is uniform from one end of the interlayer film toward the other end, the first non-gradient region being closer to one end than the second non-gradient region.

[0020] In a particular embodiment of the intermediate film of the present invention, the weight ratio of the total content of colorant contained in each layer of the intermediate film constituting the second non-gradient region to the total content of colorant contained in each layer of the intermediate film constituting the first non-gradient region is 0.15 or more and 0.95 or less.

[0021] In a particular embodiment of the interlayer film of the present invention, the colored region has a gradient region in which the visible light transmittance of the laminated glass X increases from one end of the interlayer film toward the other end, the first non-gradient region being closer to one end than the gradient region, and the second non-gradient region being closer to the other end than the gradient region.

[0022] In a particular embodiment of the interlayer film of the present invention, the colored region has only a gradient region in which the visible light transmittance of the laminated glass X increases from one end of the interlayer film toward the other end.

[0023] In one particular embodiment of the intermediate film of the present invention, at least one layer of the intermediate film constituting the colored region comprises heat-insulating particles.

[0024] In one particular embodiment of the present invention, the intermediate film is used in a rear windshield, a sunroof, or a rear windshield-sunroof integrated glass.

[0025] According to a broad aspect of the present invention, a laminated glass is provided, comprising: a first laminated glass component; a second laminated glass component; and an interlayer film for the laminated glass, the interlayer film for the laminated glass being disposed between the first laminated glass component and the second laminated glass component.

[0026] According to a broad aspect of the present invention, a laminated glass is provided, which is a laminated glass having one end and another end located on the opposite side of said one end, wherein the laminated glass comprises: a first laminated glass component; a second laminated glass component; and an interlayer film disposed between the first laminated glass component and the second laminated glass component, the interlayer film having a colored region with a visible light transmittance of 1% to 50%, wherein the colored region accounts for 95% or more of the total planar area of ​​the laminated glass, and the first visible light transmittance at a position 5 cm from said one end toward said other end is less than the second visible light transmittance at a position 5 cm from said other end toward said one end, the first visible light transmittance being 1% to 20%, the second visible light transmittance being 5% to 50%, and the absolute value of the difference between the first visible light transmittance and the second visible light transmittance being 2% to 45%.

[0027] In a specific embodiment of the laminated glass of the present invention, the planar area of ​​the colored region is 100% of the total planar area of ​​the laminated glass.

[0028] In a particular embodiment of the laminated glass of the present invention, the maximum absolute value of the percentage change in visible light transmittance in the colored region from one end to the other end is less than 4.5% / mm.

[0029] In a particular embodiment of the laminated glass of the present invention, the colored region has a first non-gradient region with uniform visible light transmittance from one end to the other end, and a second non-gradient region with uniform visible light transmittance from one end to the other end, wherein the first non-gradient region is closer to one end than the second non-gradient region.

[0030] In a particular embodiment of the laminated glass of the present invention, the colored region has a gradient region in which the visible light transmittance increases from one end to the other end, the first non-gradient region is closer to one end than the gradient region, and the second non-gradient region is closer to the other end than the gradient region.

[0031] In a particular embodiment of the laminated glass of the present invention, the colored region has only a gradient region in which the visible light transmittance increases from one end to the other end.

[0032] The effects of the invention

[0033] With the interlayer film for laminated glass of the present invention, laminated glass with excellent appearance integrity can be obtained. The laminated glass of the present invention has excellent appearance integrity. Attached Figure Description

[0034] [ Figure 1 ] Figure 1 This is a schematic cross-sectional view of the interlayer film for laminated glass according to the first embodiment of the present invention.

[0035] [ Figure 2 ] Figure 2 It is an illustrative representation of the use of Figure 1 This is a cross-sectional view of laminated glass with an interlayer film.

[0036] [ Figure 3 ] Figure 3 This is a schematic cross-sectional view of the interlayer film for laminated glass according to the second embodiment of the present invention.

[0037] [ Figure 4 ] Figure 4 It is an illustrative representation of the use of Figure 3 This is a cross-sectional view of laminated glass with an interlayer film.

[0038] [ Figure 5 ] Figure 5This is a schematic cross-sectional view of the interlayer film for laminated glass according to the third embodiment of the present invention.

[0039] [ Figure 6 ] Figure 6 It is an illustrative representation of the use of Figure 5 This is a cross-sectional view of laminated glass with an interlayer film.

[0040] [ Figure 7 ] Figure 7 This is a schematic cross-sectional view of the interlayer film for laminated glass according to the fourth embodiment of the present invention.

[0041] [ Figure 8 ] Figure 8 It is an illustrative representation of the use of Figure 7 This is a cross-sectional view of laminated glass with an interlayer film.

[0042] [ Figure 9 ] Figure 9 This is a schematic cross-sectional view of the interlayer film for laminated glass according to the fifth embodiment of the present invention.

[0043] [ Figure 10 ] Figure 10 It is an illustrative representation of the use of Figure 9 This is a cross-sectional view of laminated glass with an interlayer film.

[0044] [ Figure 11 ] Figure 11 This is a schematic cross-sectional view of the interlayer film for laminated glass according to the sixth embodiment of the present invention.

[0045] [ Figure 12 ] Figure 12 It is an illustrative representation of the use of Figure 11 This is a cross-sectional view of laminated glass with an interlayer film.

[0046] [ Figure 13 ] Figure 13 This is a schematic cross-sectional view of the interlayer film for laminated glass according to the seventh embodiment of the present invention.

[0047] [ Figure 14 ] Figure 14 It is an illustrative representation of the use of Figure 13 This is a cross-sectional view of laminated glass with an interlayer film.

[0048] [ Figure 15 ] Figure 15 This is a schematic cross-sectional view of the interlayer film for laminated glass according to the eighth embodiment of the present invention.

[0049] [ Figure 16 ] Figure 16It is an illustrative representation of the use of Figure 15 This is a cross-sectional view of laminated glass with an interlayer film.

[0050] [ Figure 17 ] Figure 17 This is a schematic cross-sectional view of the interlayer film for laminated glass according to the ninth embodiment of the present invention.

[0051] [ Figure 18 ] Figure 18 It is an illustrative representation of the use of Figure 17 This is a cross-sectional view of laminated glass with an interlayer film.

[0052] [ Figure 19 ] Figure 19 This is a schematic cross-sectional view of the interlayer film for laminated glass according to the 10th embodiment of the present invention.

[0053] [ Figure 20 ] Figure 20 It is an illustrative representation of the use of Figure 19 This is a cross-sectional view of laminated glass with an interlayer film. Detailed Implementation

[0054] The present invention will now be described in detail.

[0055] The interlayer film (hereinafter, sometimes referred to as interlayer film) for laminated glass of the present invention has one end and another end located on the opposite side of said one end. When the interlayer film of the present invention is disposed between two pieces of transparent glass based on JIS R3202:1996 to obtain laminated glass X, the interlayer film has a colored region in which the visible light transmittance of said laminated glass X is 1% to 50%, and the colored region accounts for 95% or more of the total planar area of ​​the interlayer film. In the interlayer film of the present invention, the first visible light transmittance of said laminated glass X at a position 5 cm from said one end toward said other end is less than the second visible light transmittance of said laminated glass X at a position 5 cm from said other end toward said one end. In the interlayer film of the present invention, the first visible light transmittance is 1% to 20%, the second visible light transmittance is 5% to 50%, and the absolute value of the difference between the first visible light transmittance and the second visible light transmittance is 2% to 45%.

[0056] In the interlayer of the present invention, due to the aforementioned configuration, laminated glass with excellent appearance integrity can be obtained. Furthermore, in the interlayer of the present invention, due to the aforementioned configuration, laminated glass with excellent appearance design can be obtained.

[0057] The laminated glass of the present invention has one end and another end located on the opposite side of said one end. The laminated glass of the present invention comprises: a first laminated glass component; a second laminated glass component; and an interlayer film (interlayer film for laminated glass), said interlayer film being disposed between the first laminated glass component and the second laminated glass component. The laminated glass of the present invention has a colored region with a visible light transmittance of 1% to 50%, and the colored region accounts for 95% or more of the total planar area of ​​the laminated glass. In the laminated glass of the present invention, the first visible light transmittance at a position 5 cm from said one end toward said other end is less than the second visible light transmittance at a position 5 cm from said other end toward said one end. In the laminated glass of the present invention, the first visible light transmittance is 1% to 20%, the second visible light transmittance is 5% to 50%, and the absolute value of the difference between the first and second visible light transmittances is 2% to 45%.

[0058] The laminated glass of the present invention exhibits excellent overall appearance integrity due to the aforementioned configuration. Furthermore, the laminated glass of the present invention also exhibits excellent design flexibility due to the aforementioned configuration.

[0059] In this invention, the visible light transmittance of laminated glass X prepared using the interlayer film of this invention and laminated glass of this invention (hereinafter sometimes referred to as laminated glass Y (sometimes referred to as laminated glass)) is measured. Laminated glass X is prepared for the purpose of measuring visible light transmittance. In the interlayer film of this invention, laminated glass can be prepared using a laminated glass component other than two transparent glass sheets based on JIS R3202:1996, or laminated glass can be prepared using a laminated glass component other than transparent glass.

[0060] The visible light transmittance of the laminated glass X and the laminated glass Y of the present invention is determined by measuring the transmittance of the laminated glass X and Y at wavelengths of 380 nm to 780 nm using a spectrophotometer (e.g., "U-4100" manufactured by HITACHI HIGH-TECH) based on JIS R3106:1998 or JIS R3212:1998.

[0061] The laminated glass X is prepared by placing the interlayer film between two pieces of transparent glass according to JIS R3202:1996. The laminated glass X is prepared for measuring visible light transmittance. The laminated glass X is preferably prepared as follows.

[0062] A laminate was formed by sandwiching an interlayer between two 2mm thick transparent glass sheets according to JIS R3202:1996. The laminate was placed in a rubber bag and degassed under a vacuum of 2.6 kPa for 20 minutes. While still degassed, it was transferred to an oven and vacuum-pressed at 90°C for 30 minutes to pre-press the laminate. The pre-pressed laminate was then pressed in an autoclave at 135°C and 1.2 MPa for 20 minutes to obtain laminated glass X.

[0063] The interlayer of the present invention has a colored region in which the visible light transmittance of the laminated glass X is 1% to 50%. Of the total planar area of ​​the interlayer, the planar area of ​​the colored region is 95% or more.

[0064] The laminated glass Y of the present invention has a colored region in which the visible light transmittance of the laminated glass is more than 1% and less than 50%. Of the total planar area of ​​the laminated glass Y, the planar area of ​​the colored region is more than 95%.

[0065] In the total planar area of ​​the interlayer film or the total planar area of ​​the laminated glass Y, the planar area of ​​the colored region is preferably 96% or more, more preferably 97% or more, further preferably 98% or more, and particularly preferably 99% or more. In the total planar area of ​​the interlayer film or the total planar area of ​​the laminated glass Y, the planar area of ​​the colored region may be less than 100%, and most preferably 100%. When the planar area of ​​the colored region is above the lower limit, the appearance design and privacy protection can be further improved.

[0066] In the interlayer of the present invention, the first visible light transmittance of the laminated glass X at a position 5 cm from one end toward the other end of the interlayer is less than the second visible light transmittance of the laminated glass X at a position 5 cm from the other end toward one end of the interlayer.

[0067] In the laminated glass Y of the present invention, the first visible light transmittance of the laminated glass at a position 5 cm from one end toward the other end is less than the second visible light transmittance of the laminated glass Y at a position 5 cm from the other end toward one end.

[0068] It should be noted that in the laminated glass Y, the laminated glass component sometimes has black ceramic on the entire circumference or a portion of its periphery. In this case, the visible light transmittance at a position 5 cm from the boundary between the black ceramic and the non-black ceramic towards the non-black ceramic (a position 5 cm from one end of the laminated glass Y towards the other end or from the other end towards one end) can be set as the first or second visible light transmittance.

[0069] In the interlayer film and the laminated glass Y of the present invention, the first visible light transmittance is 1% or more and 20% or less, the second visible light transmittance is 5% or more and 50% or less, and the absolute value of the difference between the first visible light transmittance and the second visible light transmittance is 2% or more and 45% or less.

[0070] The first visible light transmittance is preferably 2% or more, more preferably 3% or more, preferably 15% or less, more preferably 10% or less, even more preferably 8% or less, and particularly preferably 6% or less. When the first visible light transmittance is above the lower limit and below the upper limit, privacy protection can be further improved.

[0071] The second visible light transmittance is preferably 10% or more, more preferably 15% or more, even more preferably 18% or more, preferably 45% or less, more preferably 35% or less, even more preferably 30% or less, and particularly preferably 25% or less. When the second visible light transmittance is above the lower limit and below the upper limit, privacy protection can be further improved.

[0072] The absolute value of the difference between the first visible light transmittance and the second visible light transmittance is preferably 3% or more, more preferably 4% or more, preferably 44% or less, more preferably 30% or less, even more preferably 25% or less, and particularly preferably 17% or less. When the absolute value of the difference is above the lower limit and below the upper limit, the appearance integrity of the laminated glass can be further improved.

[0073] The maximum value of the absolute value of the change in visible light transmittance of the laminated glass X in the colored region from one end of the interlayer film toward the other end is set as the maximum value (1). The maximum value of the absolute value of the change in visible light transmittance in the colored region from one end of the laminated glass Y toward the other end is set as the maximum value (2). The maximum values ​​(1) and (2) are preferably 4.5% / mm or less, more preferably 3% / mm or less, and even more preferably 2% / mm or less. When the maximum values ​​(1) and (2) are below the upper limit, the appearance integrity of the laminated glass can be further improved. It should be noted that the maximum values ​​(1) and (2) can be 0.02% / mm or more, 0.2% / mm or more, and 1.0% / mm or more, respectively.

[0074] In the intermediate film, the colored region preferably has a non-gradient region where the visible light transmittance of the laminated glass X is uniform from one end of the intermediate film toward the other end.

[0075] In the interlayer film, the colored region preferably has a first non-gradient region where the visible light transmittance of the laminated glass X is uniform from one end of the interlayer film toward the other end, and a second non-gradient region where the visible light transmittance of the laminated glass X is uniform from one end of the interlayer film toward the other end. In this case, the first non-gradient region is closer to one end of the interlayer film than the second non-gradient region. In this case, the overall appearance and design aesthetics can be further improved.

[0076] From the viewpoint of further improving the appearance design, in the interlayer film, the colored area preferably has a gradient region in which the visible light transmittance of the laminated glass X increases from one end of the interlayer film toward the other end.

[0077] In the laminated glass Y, the colored region preferably has a non-gradient region where the visible light transmittance of the laminated glass Y is uniform from one end to the other end.

[0078] In the laminated glass Y, the colored region preferably has a first non-gradient region where the visible light transmittance of the laminated glass Y is uniform from one end to the other end, and a second non-gradient region where the visible light transmittance of the laminated glass Y is uniform from one end to the other end. In this case, the first non-gradient region is closer to one end of the laminated glass than the second non-gradient region. This further improves the overall appearance and design aesthetics.

[0079] From the viewpoint of further improving the appearance design, in the laminated glass Y, the colored area preferably has a gradient region in which the visible light transmittance of the laminated glass Y increases from one end to the other end.

[0080] It should be noted that "uniform visible light transmittance" in the non-gradient regions (the first and second non-gradient regions) means that the visible light transmittance remains completely unchanged, or that the change in visible light transmittance from one end to the other end occurs with an absolute value of less than 0.02% / mm. Furthermore, the term "gradient region" refers to a region where the visible light transmittance increases with an absolute value of 0.02% / mm or more from one end to the other end.

[0081] In the interlayer film and the laminated glass Y, the colored region may also have a non-gradient region at one end and a gradient region at the other end. Alternatively, in the interlayer film and the laminated glass Y, the colored region may have a gradient region at one end and a non-gradient region at the other end.

[0082] In the interlayer film and the laminated glass Y, the colored area may or may not have a gradient region, or it may only have a gradient region. Alternatively, the colored area may not have a non-gradient region. When the colored area has only a gradient region, the overall appearance and design aesthetics can be further improved. Conversely, the colored area may also only have a non-gradient region.

[0083] In the total planar area of ​​the interlayer film or the total planar area of ​​the laminated glass Y, the planar area of ​​the non-gradient region is preferably 20% or more, more preferably 30% or more, further preferably 40% or more, preferably 99% or less, more preferably 95% or less, and further preferably 90% or less. When the planar area of ​​the non-gradient region is above the lower limit and below the upper limit, the appearance integrity, design, and privacy protection can be further improved. It should be noted that the planar area of ​​the non-gradient region, when the non-gradient region has the first non-gradient region and the second non-gradient region, refers to the sum of the planar areas of the first non-gradient region and the second non-gradient region. It should be noted that in the total planar area of ​​the interlayer film or the total planar area of ​​the laminated glass Y, the planar area of ​​the non-gradient region can be 0% or more, less than 100%, or 100%.

[0084] Of the total planar area of ​​the interlayer film or the total planar area of ​​the laminated glass Y, the planar area of ​​the first non-gradient region is preferably 5% or more, more preferably 25% or more, even more preferably 45% or more, preferably less than 80%, more preferably less than 70%, and even more preferably less than 60%. When the planar area of ​​the first non-gradient region is above the lower limit and below the upper limit, the appearance integrity, design, and privacy protection can be further improved.

[0085] In the total planar area of ​​the interlayer film or the total planar area of ​​the laminated glass Y, the planar area of ​​the second non-gradient region is preferably 10% or more, more preferably 20% or more, even more preferably 30% or more, preferably less than 70%, more preferably less than 60%, and even more preferably less than 50%. When the planar area of ​​the second non-gradient region is above the lower limit and below the upper limit, the appearance integrity, design, and privacy protection can be further improved.

[0086] In the total planar area of ​​the interlayer film or the total planar area of ​​the laminated glass Y, the planar area of ​​the gradient region is preferably 0.5% or more, more preferably 1% or more, further preferably 5% or more, preferably 75% or less, more preferably 50% or less, and further preferably 25% or less. When the planar area of ​​the gradient region is above the lower limit and below the upper limit, the appearance integrity, design, and privacy protection can be further improved. It should be noted that the planar area of ​​the gradient region in the total planar area of ​​the interlayer film or the total planar area of ​​the laminated glass Y can be less than 100% or can be 100%.

[0087] In the total planar area of ​​the interlayer film or the total planar area of ​​the laminated glass Y, the sum of the planar areas of the first non-gradient region and the gradient region is preferably 30% or more, more preferably 40% or more, even more preferably 50% or more, preferably 85% or less, more preferably 75% or less, and even more preferably 65% ​​or less. When the sum is above the lower limit and below the upper limit, the appearance integrity, design, and privacy protection can be further improved.

[0088] The specific embodiments of the present invention will now be described with reference to the accompanying drawings. It should be noted that, for ease of illustration, the size and dimensions of the interlayer film and laminated glass in the following drawings are appropriately modified according to their actual size and shape. Different parts may be interchanged in the following drawings. Parts that can be constructed in the same way are sometimes given the same reference numerals.

[0089] Figure 1 This is a schematic cross-sectional view of the interlayer film for laminated glass according to the first embodiment of the present invention. Figure 2 It is an illustrative representation of the use of Figure 1 This is a cross-sectional view of laminated glass with an interlayer film.

[0090] Figure 1 This is a cross-sectional view along the thickness direction of the intermediate membrane 11. The intermediate membrane 11 has one end 11a and another end 11b. One end 11a and the other end 11b are opposite ends.

[0091] The intermediate film 11 comprises a first layer 1 containing a colorant and a second layer 2 containing a colorant. The second layer 2 extends to one end 11a of the intermediate film 11. The second layer 2 does not extend to the other end 11b of the intermediate film 11. The portion at one end 11a of the intermediate film 11 is composed of the first layer 1 and the second layer 2. The portion at the other end 11b of the intermediate film 11 is composed of the first layer 1.

[0092] Layer 1 is disposed on both surface sides of layer 2. Layer 2 is embedded in layer 1. Layer 1 is the surface layer of intermediate film 11. Layer 2 is the intermediate layer of intermediate film 11.

[0093] The second layer 2 has a gradient portion 2X where the visible light transmittance increases from one end 11a of the intermediate film 11 towards the other end 11b. The second layer 2 has a non-gradient portion 2Y at one end 11a of the intermediate film 11. The second layer 2 extends to one end 11a of the intermediate film 11 at the non-gradient portion 2Y. The gradient portion 2X is the portion where the thickness of the second layer 2 decreases from one end 11a of the intermediate film 11 towards the other end 11b. The non-gradient portion 2Y is the portion where the thickness of the second layer 2 is uniform.

[0094] In the interlayer 11, the region from one end 11a to the other end 11b is the colored region R. The colored region R has a first non-gradient region RY, a gradient region RX, and a second non-gradient region RZ. The first non-gradient region RY is closer to the side of one end 11a than the gradient region RX, and the second non-gradient region RZ is closer to the side of the other end 11b than the gradient region RX. The colored region R, the first non-gradient region RY, the gradient region RX, and the second non-gradient region RZ are determined by preparing the laminated glass X separately and measuring the visible light transmittance of the laminated glass X.

[0095] The first non-gradient region RY of the intermediate film 11 is a region in which a non-gradient portion 2Y of the first layer 1 and the second layer 2 exists in the thickness direction of the intermediate film 11. The gradient region RX of the intermediate film 11 is a region in which a gradient portion 2X of the first layer 1 and the second layer 2 exists in the thickness direction of the intermediate film 11. The second non-gradient region RZ of the intermediate film 11 is a region in which only the first layer 1 exists in the thickness direction of the intermediate film 11. The second non-gradient region RZ of the intermediate film 11 is a region in which the second layer 2 does not exist in the thickness direction of the intermediate film 11.

[0096] Figure 2 This is a cross-sectional view along the thickness direction of the laminated glass 31. The laminated glass 31 includes a first laminated glass component 21, a second laminated glass component 22, and an interlayer film 11. The interlayer film 11 is disposed between the first laminated glass component 21 and the second laminated glass component 22. The first laminated glass component 21 is disposed and laminated on the first surface side of the interlayer film 11. The second laminated glass component 22 is disposed and laminated on the second surface side of the interlayer film 11 opposite to the first surface.

[0097] The laminated glass 31 has one end 31a and another end 31b. End 31a and end 31b are opposite sides. In the laminated glass 31, the area from one end 31a to the other end 31b is a colored region R. The colored region R has a first non-gradient region RY, a gradient region RX, and a second non-gradient region RZ. The first non-gradient region RY is closer to the one-end 31a side than the gradient region RX, and the second non-gradient region RZ is closer to the other end 31b side than the gradient region RX.

[0098] The first non-gradient region RY of the laminated glass 31 is the region in the thickness direction of the laminated glass 31 where the first laminated glass component 21, the second laminated glass component 22, the first layer 1, and the second layer 2 have non-gradient portions 2Y. The gradient region RX of the laminated glass 31 is the region in the thickness direction of the laminated glass 31 where the first laminated glass component 21, the second laminated glass component 22, the first layer 1, and the second layer 2 have gradient portions 2X. The second non-gradient region RZ of the laminated glass 31 is the region in the thickness direction of the laminated glass 31 where the first laminated glass component 21, the second laminated glass component 22, and the first layer 1 exist. The second non-gradient region RZ of the laminated glass 31 is the region in the thickness direction of the laminated glass 31 where the second layer 2 does not exist.

[0099] Figure 3 This is a schematic cross-sectional view of the interlayer film for laminated glass according to the second embodiment of the present invention. Figure 4 It is an illustrative representation of the use of Figure 3 This is a cross-sectional view of laminated glass with an interlayer film.

[0100] Figure 3 This is a cross-sectional view along the thickness direction of the intermediate membrane 11A. The intermediate membrane 11A has one end 11Aa and another end 11Ab. One end 11Aa and the other end 11Ab are opposite ends.

[0101] The intermediate film 11A comprises: a first layer 1A containing a colorant, a second layer 2A containing a colorant, a third layer 3A containing a colorant, and a fourth layer 4A not containing a colorant. The second layer 2A reaches one end 11Aa of the intermediate film 11A. The second layer 2A does not reach the other end 11Ab of the intermediate film 11A. The portion of one end 11Aa of the intermediate film 11A is composed of the first layer 1A, the second layer 2A, the third layer 3A, and the fourth layer 4A. The portion of the other end 11Ab of the intermediate film 11A is composed of the first layer 1A, the third layer 3A, and the fourth layer 4A.

[0102] A first layer 1A is disposed on both surface sides of the second layer 2A. A second layer 2A is embedded in the first layer 1A. The first layer 1A is the surface layer of the intermediate film 11A. The second layer 2A is the intermediate layer of the intermediate film 11A.

[0103] The third layer 3A is configured and stacked on the surface of the fourth layer 4A opposite to that of the first layer 1A. The fourth layer 4A is configured and stacked on the surface of the first layer 1A opposite to that of the second layer 2A. The third layer 3A is the surface layer of the intermediate membrane 11A. The fourth layer 4A is the intermediate layer of the intermediate membrane 11A. The fourth layer 4A is a sound insulation layer.

[0104] The second layer 2A has a gradient portion 2AX where the visible light transmittance increases from one end 11Aa side of the intermediate film 11A towards the other end 11Ab side. The second layer 2A has a non-gradient portion 2AY at one end 11Aa side of the intermediate film 11A. The second layer 2A extends to one end 11Aa of the intermediate film 11A at the non-gradient portion 2AY. The gradient portion 2AX is the portion where the thickness of the second layer 2A decreases from one end 11Aa side of the intermediate film 11A towards the other end 11Ab side. The non-gradient portion 2AY is the portion where the thickness of the second layer 2A is uniform.

[0105] In the interlayer 11A, the region from one end 11Aa to the other end 11Ab is the colored region R. The colored region R has a first non-gradient region RY, a gradient region RX, and a second non-gradient region RZ. The first non-gradient region RY is closer to the side of one end 11Aa than the gradient region RX, and the second non-gradient region RZ is closer to the side of the other end 11Ab than the gradient region RX. The colored region R, the first non-gradient region RY, the gradient region RX, and the second non-gradient region RZ are determined by preparing the laminated glass X and measuring the visible light transmittance of the laminated glass X.

[0106] The first non-gradient region RY of the intermediate film 11A is a region in which the non-gradient portions 2AY of the first layer 1A and the second layer 2A, the third layer 3A, and the fourth layer 4A exist in the thickness direction of the intermediate film 11A. The gradient region RX of the intermediate film 11A is a region in which the gradient portions 2AX of the first layer 1A and the second layer 2A, the third layer 3A, and the fourth layer 4A exist in the thickness direction of the intermediate film 11A. The second non-gradient region RZ of the intermediate film 11A is a region in which the first layer 1A, the third layer 3A, and the fourth layer 4A exist in the thickness direction of the intermediate film 11A. The third non-gradient region RZ of the intermediate film 11A is a region in which the second layer 2A is not present in the thickness direction of the intermediate film 11A.

[0107] Figure 4 This is a cross-sectional view along the thickness direction of the laminated glass 31A. The laminated glass 31A includes a first laminated glass component 21, a second laminated glass component 22, and an interlayer film 11A. The interlayer film 11A is disposed between the first laminated glass component 21 and the second laminated glass component 22. The first laminated glass component 21 is disposed and laminated on the first surface side of the interlayer film 11A. The second laminated glass component 22 is disposed and laminated on the second surface side of the interlayer film 11A opposite to the first surface.

[0108] The laminated glass 31A has one end 31Aa and the other end 31Ab. End 31Aa and end 31Ab are opposite ends. In the laminated glass 31A, the region from one end 31Aa to the other end 31Ab is a colored region R. The colored region R has a first non-gradient region RY, a gradient region RX, and a second non-gradient region RZ. The first non-gradient region RY is closer to the side of one end 31Aa than the gradient region RX, and the second non-gradient region RZ is closer to the side of the other end 31Ab than the gradient region RX.

[0109] The first non-gradient region RY of the laminated glass 31A is the region in the thickness direction of the laminated glass 31A containing the first laminated glass component 21, the second laminated glass component 22, the non-gradient portions 2AY of the first layer 1A and the second layer 2A, the third layer 3A, and the fourth layer 4A. The gradient region RX of the laminated glass 31A is the region in the thickness direction of the laminated glass 31A containing the first laminated glass component 21, the second laminated glass component 22, the gradient portions 2AX of the first layer 1A and the second layer 2A, the third layer 3A, and the fourth layer 4A. The second non-gradient region RZ of the laminated glass 31A is the region in the thickness direction of the laminated glass 31A containing the first laminated glass component 21, the second laminated glass component 22, the first layer 1A, the third layer 3A, and the fourth layer 4A. The second non-gradient region RZ of the laminated glass 31A is the region in the thickness direction of the laminated glass 31A where the second layer 2A is not present.

[0110] Figure 5 This is a schematic cross-sectional view of the interlayer film for laminated glass according to the third embodiment of the present invention. Figure 6 It is an illustrative representation of the use of Figure 5 This is a cross-sectional view of laminated glass with an interlayer film.

[0111] Figure 5 This is a cross-sectional view along the thickness direction of the intermediate membrane 11B. The intermediate membrane 11B has one end 11Ba and the other end 11Bb. One end 11Ba and the other end 11Bb are opposite ends.

[0112] The intermediate film 11B comprises: a first layer 1B containing a colorant, a second layer 2B containing a colorant, a third layer 3B containing a colorant, and a fourth layer 4B not containing a colorant. The second layer 2B extends to one end 11Ba of the intermediate film 11B. The second layer 2B does not extend to the other end 11Bb of the intermediate film 11B. The portion of one end 11Ba of the intermediate film 11B is composed of the first layer 1B, the second layer 2B, the third layer 3B, and the fourth layer 4B. The portion of the other end 11Bb of the intermediate film 11B is composed of the first layer 1B, the third layer 3B, and the fourth layer 4B.

[0113] A first layer 1B is disposed on one surface side of the second layer 2B. A fourth layer 4B is disposed on the other surface side of the second layer 2B. The second layer 2B is embedded between the first layer 1B and the fourth layer 4B. The first layer 1B is the surface layer of the intermediate film 11B. The second layer 2B is the intermediate layer of the intermediate film 11B.

[0114] The third layer 3B is disposed and stacked on the surface of the fourth layer 4B opposite to the surface of the first layer 1B. The fourth layer 4B is disposed and stacked on the surface of the second layer 2B opposite to the surface of the first layer 1B. Furthermore, the fourth layer 4B is disposed and stacked on the surface of the first layer 1B. The third layer 3B is the surface layer of the intermediate membrane 11B. The fourth layer 4B is the intermediate layer of the intermediate membrane 11B. The fourth layer 4B is a sound insulation layer.

[0115] The second layer 2B has a gradient portion 2BX whose visible light transmittance increases from one end 11Ba side of the intermediate film 11B towards the other end 11Bb side. The second layer 2B has a non-gradient portion 2BY at one end 11Ba side of the intermediate film 11B. The second layer 2B extends to one end 11Ba of the intermediate film 11B at the non-gradient portion 2BY. The gradient portion 2BX is the portion of the second layer 2B where the thickness decreases from one end 11Ba side of the intermediate film 11B towards the other end 11Bb side. The non-gradient portion 2BY is the portion of the second layer 2B where the thickness is uniform.

[0116] In the interlayer 11B, the region from one end 11Ba to the other end 11Bb is the colored region R. The colored region R has a first non-gradient region RY, a gradient region RX, and a second non-gradient region RZ. The first non-gradient region RY is closer to the side at one end 11Ba than the gradient region RX, and the second non-gradient region RZ is closer to the side at the other end 11Bb than the gradient region RX. The colored region R, the first non-gradient region RY, the gradient region RX, and the second non-gradient region RZ are determined by preparing the laminated glass X and measuring the visible light transmittance of the laminated glass X.

[0117] The first non-gradient region RY of the intermediate film 11B is a region in which the non-gradient portions 2BY of the first layer 1B and the second layer 2B, the third layer 3B, and the fourth layer 4B exist in the thickness direction of the intermediate film 11B. The gradient region RX of the intermediate film 11B is a region in which the gradient portions 2BX of the first layer 1B and the second layer 2B, the third layer 3B, and the fourth layer 4B exist in the thickness direction of the intermediate film 11B. The second non-gradient region RZ of the intermediate film 11B is a region in which the first layer 1B, the third layer 3B, and the fourth layer 4B exist in the thickness direction of the intermediate film 11B. The third non-gradient region RZ of the intermediate film 11B is a region in which the second layer 2B does not exist in the thickness direction of the intermediate film 11B.

[0118] Figure 6This is a cross-sectional view along the thickness direction of the laminated glass 31B. The laminated glass 31B includes a first laminated glass component 21, a second laminated glass component 22, and an interlayer film 11B. The interlayer film 11B is disposed between the first laminated glass component 21 and the second laminated glass component 22. The first laminated glass component 21 is disposed and laminated on the first surface side of the interlayer film 11B. The second laminated glass component 22 is disposed and laminated on the second surface side of the interlayer film 11B opposite to the first surface.

[0119] The laminated glass 31B has one end 31Ba and the other end 31Bb. The one end 31Ba and the other end 31Bb are opposite sides. In the laminated glass 31B, the region from one end 31Ba to the other end 31Bb is a colored region R. The colored region R has a first non-gradient region RY, a gradient region RX, and a second non-gradient region RZ. The first non-gradient region RY is closer to the one end 31Ba side than the gradient region RX, and the second non-gradient region RZ is closer to the other end 31Bb side than the gradient region RX.

[0120] The first non-gradient region RY of the laminated glass 31B is the region in the thickness direction of the laminated glass 31B where the first laminated glass component 21, the second laminated glass component 22, the first layer 1B, the non-gradient portion 2BY of the second layer 2B, the third layer 3B, and the fourth layer 4B are present. The gradient region RX of the laminated glass 31B is the region in the thickness direction of the laminated glass 31B where the first laminated glass component 21, the second laminated glass component 22, the first layer 1B, the second layer 2B, the gradient portion 2BX of the second layer 2B, the third layer 3B, and the fourth layer 4B are present. The second non-gradient region RZ of the laminated glass 31B is the region in the thickness direction of the laminated glass 31B where the first laminated glass component 21, the second laminated glass component 22, the first layer 1B, the third layer 3B, and the fourth layer 4B are present. The second non-gradient region RZ of the laminated glass 31B is the region in the thickness direction of the laminated glass 31B where the second layer 2B is not present.

[0121] Figure 7 This is a schematic cross-sectional view of the interlayer film for laminated glass according to the fourth embodiment of the present invention. Figure 8 It is an illustrative representation of the use of Figure 7 This is a cross-sectional view of laminated glass with an interlayer film.

[0122] Figure 7 This is a cross-sectional view along the thickness direction of the intermediate membrane 11C. The intermediate membrane 11C has one end 11Ca and the other end 11Cb. One end 11Ca and the other end 11Cb are opposite ends.

[0123] The intermediate film 11C comprises: a first layer 1C containing a colorant and a second layer 2C containing a colorant. The second layer 2C extends to one end 11Ca of the intermediate film 11C. The second layer 2C does not extend to the other end 11Cb of the intermediate film 11C. The portion at one end 11Ca of the intermediate film 11C is composed of the first layer 1C and the second layer 2C. The portion at the other end 11Cb of the intermediate film 11C is composed of the first layer 1C.

[0124] A first layer 1C is disposed on both surface sides of the second layer 2C. The second layer 2C is embedded in the first layer 1C. The first layer 1C is the surface layer of the intermediate film 11C. The second layer 2C is the intermediate layer of the intermediate film 11C.

[0125] The second layer 2C only has a non-gradient portion 2CY. The non-gradient portion 2CY is the part of the second layer 2C with uniform thickness.

[0126] In the interlayer 11C, the region from one end 11Ca to the other end 11Cb is the colored region R. The colored region R has a first non-gradient region RY and a second non-gradient region RZ. The first non-gradient region RY is closer to the 11Ca end than the second non-gradient region RZ. The colored region R, the first non-gradient region RY, and the second non-gradient region RZ are determined by preparing the laminated glass X and measuring the visible light transmittance of the laminated glass X.

[0127] The first non-gradient region RY of the intermediate film 11C is a region in which the first layer 1C and the second layer 2C have a non-gradient portion 2CY in the thickness direction of the intermediate film 11C. The second non-gradient region RZ of the intermediate film 11C is a region in which only the first layer 1C exists in the thickness direction of the intermediate film 11C. The third non-gradient region RZ of the intermediate film 11C is a region in which the second layer 2C does not exist in the thickness direction of the intermediate film 11C.

[0128] Figure 8 This is a cross-sectional view along the thickness direction of the laminated glass 31C. The laminated glass 31C includes a first laminated glass component 21, a second laminated glass component 22, and an interlayer film 11C. The interlayer film 11C is disposed between the first laminated glass component 21 and the second laminated glass component 22. The first laminated glass component 21 is disposed and laminated on the first surface side of the interlayer film 11C. The second laminated glass component 22 is disposed and laminated on the second surface side of the interlayer film 11C opposite to the first surface.

[0129] The laminated glass 31C has one end 31Ca and the other end 31Cb. End 31Ca and end 31Cb are opposite ends. In the laminated glass 31C, the region from one end 31Ca to the other end 31Cb is a colored region R. The colored region R has a first non-gradient region RY and a second non-gradient region RZ. The first non-gradient region RY is closer to the end 31Ca than the second non-gradient region RZ.

[0130] The first non-gradient region RY of the laminated glass 31C is the region in the thickness direction of the laminated glass 31C where the non-gradient portions 2CY of the laminated glass component 21, the second laminated glass component 22, the first layer 1C, and the second layer 2C exist. The second non-gradient region RZ of the laminated glass 31C is the region in the thickness direction of the laminated glass 31C where the first laminated glass component 21, the second laminated glass component 22, and the first layer 1C exist. The second non-gradient region RZ of the laminated glass 31C is the region in the thickness direction of the laminated glass 31C where the second layer 2C does not exist.

[0131] Figure 9 This is a schematic cross-sectional view of the interlayer film for laminated glass according to the fifth embodiment of the present invention. Figure 10 It is an illustrative representation of the use of Figure 9 This is a cross-sectional view of laminated glass with an interlayer film.

[0132] Figure 9 This is a cross-sectional view along the thickness direction of the intermediate membrane 11D. The intermediate membrane 11D has one end 11Da and the other end 11Db. One end 11Da and the other end 11Db are opposite ends.

[0133] The intermediate film 11D comprises: a first layer 1D containing a colorant, a second layer 2D containing a colorant, a third layer 3D containing a colorant, and a fourth layer 4D not containing a colorant. The second layer 2D extends to one end 11Da of the intermediate film 11D. The second layer 2D does not extend to the other end 11Db of the intermediate film 11D. The portion of one end 11Da of the intermediate film 11D is composed of the first layer 1D, the second layer 2D, the third layer 3D, and the fourth layer 4D. The portion of the other end 11Db of the intermediate film 11D is composed of the first layer 1D, the third layer 3D, and the fourth layer 4D.

[0134] A first layer 1D is disposed on both surface sides of the second layer 2D. The second layer 2D is embedded in the first layer 1D. The first layer 1D is the surface layer of the intermediate film 11D. The second layer 2D is the intermediate layer of the intermediate film 11D.

[0135] The third 3D layer is configured and stacked on the surface of the fourth 4D layer opposite to the first 1D layer. The fourth 4D layer is configured and stacked on the surface of the first 1D layer opposite to the second 2D layer. The third 3D layer is the surface layer of the intermediate membrane 11D. The fourth 4D layer is the intermediate layer of the intermediate membrane 11D. The fourth 4D layer is a sound insulation layer.

[0136] The second layer 2D only has a non-gradient portion 2DY. The non-gradient portion 2DY is the part of the second layer 2D with uniform thickness.

[0137] In the interlayer 11D, the region from one end 11Da to the other end 11Db is the colored region R. The colored region R has a first non-gradient region RY and a second non-gradient region RZ. The first non-gradient region RY is closer to the 11Da side than the second non-gradient region RZ. The colored region R, the first non-gradient region RY, and the second non-gradient region RZ are determined by preparing the laminated glass X and measuring the visible light transmittance of the laminated glass X.

[0138] The first non-gradient region RY of the intermediate film 11D is a region in the thickness direction of the intermediate film 11D where the first layer 1D, the second layer 2D, the third layer 3D, and the fourth layer 4D are non-gradient portions 2DY. The second non-gradient region RZ of the intermediate film 11D is a region in the thickness direction of the intermediate film 11D where the first layer 1D, the third layer 3D, and the fourth layer 4D are present. The third non-gradient region RZ of the intermediate film 11D is a region in the thickness direction of the intermediate film 11D where the second layer 2D is not present.

[0139] Figure 10 This is a cross-sectional view along the thickness direction of the laminated glass 31D. The laminated glass 31D includes a first laminated glass component 21, a second laminated glass component 22, and an interlayer film 11D. The interlayer film 11D is disposed between the first laminated glass component 21 and the second laminated glass component 22. The first laminated glass component 21 is disposed and laminated on the first surface side of the interlayer film 11D. The second laminated glass component 22 is disposed and laminated on the second surface side of the interlayer film 11D opposite to the first surface.

[0140] The laminated glass 31D has one end 31Da and the other end 31Db. End 31Da and end 31Db are opposite sides. In the laminated glass 31D, the region from one end 31Da to the other end 31Db is a colored region R. The colored region R has a first non-gradient region RY and a second non-gradient region RZ. The first non-gradient region RY is closer to the side of end 31Da than the second non-gradient region RZ.

[0141] The first non-gradient region RY of the laminated glass 31D is the region in the thickness direction of the laminated glass 31D containing the laminated glass component 21, the second laminated glass component 22, the non-gradient portions 2DY of the first layer 1D, the second layer 2D, the third layer 3D, and the fourth layer 4D. The second non-gradient region RZ of the laminated glass 31D is the region in the thickness direction of the laminated glass 31D containing the laminated glass component 21, the second laminated glass component 22, the first layer 1D, the third layer 3D, and the fourth layer 4D. The second non-gradient region RZ of the laminated glass 31D is the region in the thickness direction of the laminated glass 31D where the second layer 2D is not present.

[0142] Figure 11This is a schematic cross-sectional view of the interlayer film for laminated glass according to the sixth embodiment of the present invention. Figure 12 It is an illustrative representation of the use of Figure 11 This is a cross-sectional view of laminated glass with an interlayer film.

[0143] Figure 11 This is a cross-sectional view along the thickness direction of the intermediate membrane 11E. The intermediate membrane 11E has one end 11Ea and another end 11Eb. One end 11Ea and the other end 11Eb are opposite ends.

[0144] The intermediate film 11E comprises: a first layer 1E containing a colorant, a second layer 2E containing a colorant, a third layer 3E containing a colorant, and a fourth layer 4E not containing a colorant. The second layer 2E reaches one end 11Ea of the intermediate film 11E. The second layer 2E does not reach the other end 11Eb of the intermediate film 11E. The portion of one end 11Ea of the intermediate film 11E is composed of the first layer 1E, the second layer 2E, the third layer 3E, and the fourth layer 4E. The portion of the other end 11Eb of the intermediate film 11E is composed of the first layer 1E, the third layer 3E, and the fourth layer 4E.

[0145] A first layer 1E is disposed on one surface side of the second layer 2E. A fourth layer 4E is disposed on the other surface side of the second layer 2E. The second layer 2E is embedded between the first layer 1E and the fourth layer 4E. The first layer 1E is the surface layer of the intermediate film 11E. The second layer 2E is the intermediate layer of the intermediate film 11E.

[0146] The third layer 3E is configured and stacked on the surface of the fourth layer 4E opposite to the surface of the first layer 1E. The fourth layer 4E is configured and stacked on the surface of the second layer 2E opposite to the surface of the first layer 1E. Furthermore, the fourth layer 4E is configured and stacked on the surface of the first layer 1E. The third layer 3E is the surface layer of the intermediate membrane 11E. The fourth layer 4E is the intermediate layer of the intermediate membrane 11E. The fourth layer 4E is a sound insulation layer.

[0147] The second layer 2E has only a non-gradient portion 2EY. The non-gradient portion 2EY is the part of the second layer 2E with a uniform thickness.

[0148] In the interlayer 11E, the region from one end 11Ea to the other end 11Eb is the colored region R. The colored region R has a first non-gradient region RY and a second non-gradient region RZ. The first non-gradient region RY is closer to the end 11Ea than the second non-gradient region RZ. The colored region R, the first non-gradient region RY, and the second non-gradient region RZ are determined by preparing the laminated glass X and measuring the visible light transmittance of the laminated glass X.

[0149] The first non-gradient region RY of the intermediate film 11E is the region in which the non-gradient portions 2EY of the first layer 1E, the second layer 2E, the third layer 3E, and the fourth layer 4E exist in the thickness direction of the intermediate film 11E. The second non-gradient region RZ of the intermediate film 11E is the region in which the first layer 1E, the third layer 3E, and the fourth layer 4E exist in the thickness direction of the intermediate film 11E. The third non-gradient region RZ of the intermediate film 11E is the region in which the second layer 2E does not exist in the thickness direction of the intermediate film 11E.

[0150] Figure 12 This is a cross-sectional view along the thickness direction of the laminated glass 31E. The laminated glass 31E includes a first laminated glass component 21, a second laminated glass component 22, and an interlayer film 11E. The interlayer film 11E is disposed between the first laminated glass component 21 and the second laminated glass component 22. The first laminated glass component 21 is disposed and laminated on the first surface side of the interlayer film 11E. The second laminated glass component 22 is disposed and laminated on the second surface side of the interlayer film 11E opposite to the first surface.

[0151] The laminated glass 31E has one end 31Ea and another end 31Eb. End 31Ea and end 31Eb are opposite sides. In the laminated glass 31E, the region from one end 31Ea to the other end 31Eb is a colored region R. The colored region R has a first non-gradient region RY and a second non-gradient region RZ. The first non-gradient region RY is closer to the end 31Ea side than the second non-gradient region RZ.

[0152] The first non-gradient region RY of the laminated glass 31E is the region in the thickness direction of the laminated glass 31E containing the first laminated glass component 21, the second laminated glass component 22, the first layer 1E, the second layer 2E non-gradient portion 2EY, the third layer 3E, and the fourth layer 4E. The second non-gradient region RZ of the laminated glass 31E is the region in the thickness direction of the laminated glass 31E containing the first laminated glass component 21, the second laminated glass component 22, the first layer 1E, the third layer 3E, and the fourth layer 4E. The second non-gradient region RZ of the laminated glass 31E is the region in the thickness direction of the laminated glass 31E where the second layer 2E is not present.

[0153] Figure 13 This is a schematic cross-sectional view of the interlayer film for laminated glass according to the seventh embodiment of the present invention. Figure 14 It is an illustrative representation of the use of Figure 13 This is a cross-sectional view of laminated glass with an interlayer film.

[0154] The intermediate film 11F comprises: a first layer 1F containing a colorant and a second layer 2F containing a colorant. The second layer 2F extends to one end 11Fa of the intermediate film 11F. The second layer 2F extends to the other end 11Fb of the intermediate film 11F. The portion of the intermediate film 11F at one end 11Fa and the portion at the other end 11Fb are composed of the three layers: the first layer 1F and the second layer 2F.

[0155] A first layer 1F is disposed on both surface sides of the second layer 2F. The two first layers 1F are surface layers of the intermediate film 11F. The second layer 2F is the intermediate layer of the intermediate film 11F.

[0156] The second layer 2F has only a gradient portion 2FX where the visible light transmittance increases from one end 11Fa side of the intermediate film 11F toward the other end 11Fb side. The gradient portion 2FX is the part of the second layer 2F where the thickness decreases from one end 11Fa side of the intermediate film 11F toward the other end 11Fb side.

[0157] In the intermediate film 11F, the region from one end 11Fa to the other end 11Fb is the colored region R. The colored region R has only a gradient region RX. The colored region R and the gradient region RX are determined by preparing the laminated glass X and measuring the visible light transmittance of the laminated glass X.

[0158] The gradient region RX of the intermediate film 11F is a region in the thickness direction of the intermediate film 11F containing two layers, 1F and 2F.

[0159] Figure 14 This is a cross-sectional view along the thickness direction of the laminated glass 31F. The laminated glass 31F includes a first laminated glass component 21, a second laminated glass component 22, and an interlayer film 11F. The interlayer film 11F is disposed between the first laminated glass component 21 and the second laminated glass component 22. The first laminated glass component 21 is disposed and laminated on the first surface side of the interlayer film 11F. The second laminated glass component 22 is disposed and laminated on the second surface side of the interlayer film 11F opposite to the first surface.

[0160] The laminated glass 31F has one end 31Fa and the other end 31Fb. End 31Fa and end 31Fb are opposite ends. In the laminated glass 31F, the region from one end 31Fa to the other end 31Fb is a colored region R. The colored region R has only a gradient region RX.

[0161] The gradient region RX of the laminated glass 31F is the region in the thickness direction of the laminated glass 31F where the first laminated glass component 21, the second laminated glass component 22, and the two first layers 1F and 2F exist.

[0162] Figure 15This is a schematic cross-sectional view of the interlayer film for laminated glass according to the eighth embodiment of the present invention. Figure 16 It is an illustrative representation of the use of Figure 15 This is a cross-sectional view of laminated glass with an interlayer film.

[0163] Figure 15 This is a cross-sectional view along the thickness direction of the intermediate film 11G. The intermediate film 11G has one end 11Ga and the other end 11Gb. One end 11Ga and the other end 11Gb are opposite ends.

[0164] The intermediate film 11G comprises: a first layer 1G containing a colorant, a second layer 2G containing a colorant, a third layer 3G containing a colorant, and a fourth layer 4G not containing a colorant. The second layer 2G reaches one end 11Ga of the intermediate film 11G. The second layer 2G reaches the other end 11Gb of the intermediate film 11G. The 11Ga portion at one end and the 11Gb portion at the other end of the intermediate film 11G are composed of five layers: two first layers 1G, two second layers 2G, three third layers 3G, and four fourth layers 4G.

[0165] A first layer 1G is disposed on both surface sides of the second layer 2G. One of the first layers 1G is the surface layer of the intermediate film 11G. The second layer 2G is the intermediate layer of the intermediate film 11G.

[0166] The third layer 3G is configured and stacked on the surface of the fourth layer 4G opposite to the surface of the first layer 1G. The fourth layer 4G is configured and stacked on the surface of the first layer 1G opposite to the surface of the second layer 2G. The third layer 3G is the surface layer of the intermediate film 11G. The fourth layer 4G is the intermediate layer of the intermediate film 11G. The fourth layer 4G is a sound insulation layer.

[0167] The second layer 2G has only a gradient section 2GX where the visible light transmittance increases from one end 11Ga side of the intermediate film 11G towards the other end 11Gb side. The gradient section 2GX is the part of the second layer 2G where the thickness decreases from one end 11Ga side of the intermediate film 11G towards the other end 11Gb side.

[0168] In the intermediate film 11G, the region from one end 11Ga to the other end 11Gb is the colored region R. The colored region R has only a gradient region RX. The colored region R and the gradient region RX are determined by preparing the laminated glass X and measuring the visible light transmittance of the laminated glass X.

[0169] The gradient region RX of the intermediate film 11G is a region in the thickness direction of the intermediate film 11G containing two layers: 1G (first layer), 2G (second layer), 3G (third layer), and 4G (fourth layer).

[0170] Figure 16This is a cross-sectional view along the thickness direction of the laminated glass 31G. The laminated glass 31G includes a first laminated glass component 21, a second laminated glass component 22, and an interlayer film 11G. The interlayer film 11G is disposed between the first laminated glass component 21 and the second laminated glass component 22. The first laminated glass component 21 is disposed and laminated on the first surface side of the interlayer film 11G. The second laminated glass component 22 is disposed and laminated on the second surface side of the interlayer film 11G opposite to the first surface.

[0171] The laminated glass 31G has one end 31Ga and the other end 31Gb. The one end 31Ga and the other end 31Gb are opposite sides of the end. In the laminated glass 31G, the region from one end 31Ga to the other end 31Gb is a colored region R. The colored region R has only a gradient region RX.

[0172] The gradient region RX of the laminated glass 31G is the region in the thickness direction of the laminated glass 31G containing the first laminated glass component 21, the second laminated glass component 22, two layers 1G, 2G, 3G and 4G.

[0173] Figure 17 This is a schematic cross-sectional view of the interlayer film for laminated glass according to the ninth embodiment of the present invention. Figure 18 It is an illustrative representation of the use of Figure 17 This is a cross-sectional view of laminated glass with an interlayer film.

[0174] Figure 17 This is a cross-sectional view along the thickness direction of the intermediate membrane 11H. The intermediate membrane 11H has one end 11Ha and the other end 11Hb. One end 11Ha and the other end 11Hb are opposite ends.

[0175] The intermediate film 11H comprises: a first layer 1H containing a colorant, a second layer 2H containing a colorant, a third layer 3H containing a colorant, and a fourth layer 4H not containing a colorant. The second layer 2H reaches one end 11Ha of the intermediate film 11H. The second layer 2H reaches the other end 11Hb of the intermediate film 11H. The portion at one end 11Ha and the portion at the other end 11Hb of the intermediate film 11H are composed of the first layer 1H, the second layer 2H, the third layer 3H, and the fourth layer 4H.

[0176] A first layer 1H is disposed on one side of the surface of the second layer 2H. A fourth layer 4H is disposed on the other side of the surface of the second layer 2H. The second layer 2H is embedded between the first layer 1H and the fourth layer 4H. The first layer 1H is the surface layer of the intermediate film 11H. The second layer 2H is the intermediate layer of the intermediate film 11H.

[0177] The third layer 3H is configured and stacked on the surface of the fourth layer 4H opposite to that of the first layer 1H. The fourth layer 4H is configured and stacked on the surface of the second layer 2H opposite to that of the first layer 1H. The third layer 3H is the surface layer of the intermediate membrane 11H. The fourth layer 4H is the intermediate layer of the intermediate membrane 11H. The fourth layer 4H is the sound insulation layer.

[0178] The second layer 2H has only a gradient section 2HX where the visible light transmittance increases from one end 11Ha side of the intermediate film 11H toward the other end 11Hb side. The gradient section 2HX is the part of the second layer 2H where the thickness decreases from one end 11Ha side of the intermediate film 11H toward the other end 11Hb side.

[0179] In the intermediate film 11H, the region from one end 11Ha to the other end 11Hb is the colored region R. The colored region R has only a gradient region RX. The colored region R and the gradient region RX are determined by preparing the laminated glass X and measuring the visible light transmittance of the laminated glass X.

[0180] The gradient region RX of the intermediate film 11H is the region in the thickness direction of the intermediate film 11H where the first layer 1H, the second layer 2H, the third layer 3H and the fourth layer 4H exist.

[0181] Figure 18 This is a cross-sectional view along the thickness direction of the laminated glass 31H. The laminated glass 31H includes a first laminated glass component 21, a second laminated glass component 22, and an interlayer film 11H. The interlayer film 11H is disposed between the first laminated glass component 21 and the second laminated glass component 22. The first laminated glass component 21 is disposed and laminated on the first surface side of the interlayer film 11H. The second laminated glass component 22 is disposed and laminated on the second surface side of the interlayer film 11H opposite to the first surface.

[0182] The laminated glass 31H has one end 31Ha and the other end 31Hb. One end 31Ha and the other end 31Hb are opposite sides of the end. In the laminated glass 31H, the region from one end 31Ha to the other end 31Hb is a colored region R. The colored region R has only a gradient region RX.

[0183] The gradient region RX of the laminated glass 31H is the region in the thickness direction of the laminated glass 31H where the first laminated glass component 21, the second laminated glass component 22, the first layer 1H, the second layer 2H, the third layer 3H and the fourth layer 4H exist.

[0184] Figure 19 This is a schematic cross-sectional view of the interlayer film for laminated glass according to the 10th embodiment of the present invention. Figure 20 It is an illustrative representation of the use of Figure 19 This is a cross-sectional view of laminated glass with an interlayer film.

[0185] exist Figure 19 and Figure 20 The diagram schematically illustrates the colorant Q contained in the second layer, and also schematically shows the amount of colorant Q present. It should be noted that when the colorant is in particulate form, the actual size of the colorant is... Figure 19 and Figure 20 The size shown is much smaller. It should be noted that... Figure 19 and Figure 20 The illustration of the colorant contained in the first layer is omitted. Furthermore, in... Figure 19 and Figure 20 In the cross-sectional diagrams of the interlayer film and laminated glass used in other types of laminated glass, the colorant is omitted.

[0186] Figure 19 This is a cross-sectional view along the thickness direction of the intermediate membrane 11I. The intermediate membrane 11I has one end 11Ia and another end 11Ib. One end 11Ia and the other end 11Ib are opposite ends.

[0187] The intermediate film 11I comprises: a first layer 1I containing a colorant and a second layer 2I containing a colorant Q. The second layer 2I extends to one end 11Ia of the intermediate film 11I. The second layer 2I extends to the other end 11Ib of the intermediate film 11I. The portion of the intermediate film 11I at one end 11Ia and the portion at the other end 11Ib are composed of the three layers: the two first layers 1I and the two second layers 2I.

[0188] The first layer 1I is disposed on both surface sides of the second layer 2I. The two first layers 1I are the surface layers of the intermediate film 11I. The second layer 2I is the intermediate layer of the intermediate film 11I.

[0189] The second layer 2I has only a gradient section 2IX. The gradient section 2IX is the part in the second layer 2I where the concentration of colorant Q decreases from one end 11Ia side of the intermediate film 11I toward the other end 11Ib side.

[0190] In the intermediate film 11I, the region from one end 11Ia to the other end 11Ib is the colored region R. The colored region R has only a gradient region RX. The colored region R and the gradient region RX are respectively determined by preparing the laminated glass X and measuring the visible light transmittance of the laminated glass X.

[0191] The gradient region RX of the intermediate film 11I is a region in the thickness direction of the intermediate film 11I where there are two layers 1I and 2I.

[0192] Figure 20This is a cross-sectional view along the thickness direction of the laminated glass 31I. The laminated glass 31I includes a first laminated glass component 21, a second laminated glass component 22, and an interlayer film 11I. The interlayer film 11I is disposed between the first laminated glass component 21 and the second laminated glass component 22. The first laminated glass component 21 is disposed and laminated on the first surface side of the interlayer film 11I. The second laminated glass component 22 is disposed and laminated on the second surface side of the interlayer film 11I opposite to the first surface.

[0193] The laminated glass 31I has one end 31Ia and another end 31Ib. One end 31Ia and the other end 31Ib are opposite sides of the end. In the laminated glass 31I, the region from one end 31Ia to the other end 31Ib is the colored region R. The colored region R has only a gradient region RX.

[0194] The gradient region RX of the laminated glass 31I is the region in the thickness direction of the laminated glass 31I where the first laminated glass component 21, the second laminated glass component 22, and the two first layers 1I and the second layer 2I exist.

[0195] Gradient regions can also be formed by varying the concentration of the colorant, similar to the interlayer 11I and laminated glass 31I. These gradient regions can be formed by varying the thickness of the layer containing the colorant.

[0196] The following provides further details about the interlayer film and the components constituting the laminated glass.

[0197] (Intermediate film for laminated glass)

[0198] The intermediate membrane has a single-layer structure or a structure with two or more layers. The intermediate membrane can have a single-layer structure, a two-layer structure, a two-layer or more structure, a three-layer structure, a three-layer or more structure, a four-layer or more structure, a five-layer or more structure, or a six-layer or more structure.

[0199] The structure of the intermediate membrane can also vary. For example, the intermediate membrane may have portions with a single layer and portions with two or more layers. The intermediate membrane may have portions with a single layer and portions with three or more layers. The intermediate membrane may have portions with two layers and portions with three or more layers. When the intermediate membrane has two or more layers, in the direction orthogonal to the thickness direction, the intermediate membrane may not entirely have two or more layers; it may partially have a single layer.

[0200] The intermediate film preferably comprises a first layer and a second layer, with the first layer disposed on the first surface side of the second layer. The first layer preferably contains a colorant, more preferably a resin and a colorant. The second layer preferably contains a colorant, more preferably a resin and a colorant.

[0201] From the viewpoint of suppressing tone degradation, in the intermediate film, the first layer is preferably disposed on the second surface side of the second layer opposite to the first surface side. From the viewpoint of suppressing tone degradation, it is preferable to embed the second layer in the first layer.

[0202] From the viewpoint of suppressing tone degradation, in the intermediate film, it is preferable that the first layer is disposed on the first surface side of the second layer and the first layer is disposed on the second surface side of the second layer. From the viewpoint of suppressing tone degradation, it is preferable that the second layer is disposed between the first layers.

[0203] The intermediate film preferably comprises a first layer, a second layer, and a third layer, with the first layer disposed on the first surface side of the second layer and the third layer disposed on the second surface side of the second layer opposite to the first surface. In this case, the first layer can be disposed between the third layer and the second layer, or a fourth layer can be disposed, or both the first and fourth layers can be disposed. Furthermore, in this case, the third layer preferably contains a colorant, and more preferably contains a resin and a colorant.

[0204] Preferably, the intermediate film comprises a first layer, a second layer, a third layer, and a fourth layer, wherein the first layer is disposed on the first surface side of the second layer, the fourth layer is disposed on the second surface side of the second layer opposite to the first surface, and the third layer is disposed on the surface side of the fourth layer opposite to the first layer. In this case, it is preferable that the second layer is embedded in the first layer, the fourth layer is disposed on the first surface side of the first layer, and the third layer is disposed on the surface side of the fourth layer opposite to the first layer.

[0205] Furthermore, a functional film, such as an infrared reflective film, may be disposed in the intermediate film. For example, a functional film, such as an infrared reflective film, may be disposed between the first layer and the fourth layer in the intermediate film.

[0206] The first layer, the second layer, the third layer, and the fourth layer may have the same composition or different compositions.

[0207] The fourth layer is not particularly limited and can also be a layer with excellent sound insulation properties. The fourth layer can also be a sound insulation layer. If the fourth layer is a sound insulation layer, it can improve the sound insulation, appearance integrity, and design of the laminated glass.

[0208] The following provides further details about the intermediate membrane.

[0209] <Resin>

[0210] The intermediate film preferably comprises a resin. The first layer preferably comprises a resin. The second layer preferably comprises a resin. The third layer preferably comprises a resin. The fourth layer preferably comprises a resin. Examples of resins include thermosetting resins and thermoplastic resins. Only one type of resin may be used, or two or more types may be used in combination.

[0211] Examples of thermoplastic resins include: polyvinyl acetal resin, polyester resin, ethylene-vinyl acetate copolymer resin, ethylene-acrylic acid copolymer resin, polyurethane resin, and polyvinyl alcohol resin. Other thermoplastic resins may also be used.

[0212] <Plasticizer>

[0213] The interlayer preferably contains a plasticizer. The first layer preferably contains a plasticizer. The second layer preferably contains a plasticizer. The third layer preferably contains a plasticizer. The fourth layer preferably contains a plasticizer. When the thermoplastic resin contained in the interlayer is polyvinyl acetal resin, the interlayer (each layer) particularly preferably contains a plasticizer. Only one type of plasticizer may be used, or two or more types may be used in combination.

[0214] Examples of plasticizers include organic ester plasticizers such as monobasic and polybasic organic esters, organic phosphoric acid plasticizers, and organic phosphorous acid plasticizers. Organic ester plasticizers are preferred. The plasticizer is preferably a liquid plasticizer.

[0215] Examples of monobasic organic acid esters include diol esters obtained by reacting a diol with a monobasic organic acid. Examples of diols include triethylene glycol, tetraethylene glycol, and tripropylene glycol. Examples of monobasic organic acids include butyric acid, isobutyric acid, hexanoic acid, 2-ethylbutyric acid, heptanoic acid, octanoic acid, 2-ethylhexanoic acid, nonanoic acid, decanoic acid, and benzoic acid.

[0216] Examples of polybasic organic acid esters include ester compounds of polybasic organic acids and alcohols having a straight-chain or branched structure with 4 to 8 carbon atoms. Examples of polybasic organic acids include adipic acid, sebacic acid, and azelaic acid.

[0217] Examples of organic ester plasticizers include: triethylene glycol di-2-ethylpropionate, triethylene glycol di-2-ethylbutyrate, triethylene glycol di-2-ethylhexanoate, triethylene glycol dioctanoate, 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-propanediol di-2-ethylbutyrate, 1,4-butanediol di-2-ethylbutyrate, and diethylene glycol di-2-ethylbutyrate. Organic ester plasticizers include esters such as diethylene glycol di-2-ethylhexanoate, dipropylene glycol di-2-ethylbutyrate, triethylene glycol di-2-ethylvalerate, tetraethylene glycol di-2-ethylbutyrate, diethylene glycol dioctanoate, diethylene glycol dibenzoate, dipropylene glycol dibenzoate, dihexyl adipate, dioctyl adipate, hexylcyclohexyl adipate, mixtures of heptyl adipate and nonyl adipate, diisononyl adipate, diisodecyl adipate, heptylnonyl adipate, dibutyl sebacate, oil-modified sebacate, and mixtures of phosphate esters and adipates. Other organic ester plasticizers besides these can also be used as plasticizers. Furthermore, other adipates besides these can also be used as adipates.

[0218] Examples of organophosphate plasticizers include tributoxyethyl phosphate, isodexylphenyl phosphate, and triisopropyl phosphate.

[0219] The plasticizer is preferably a diester plasticizer as shown in formula (1).

[0220] [Chemical Formula 1]

[0221]

[0222] In formula (1), R1 and R2 represent organic groups with 5 to 10 carbon atoms, R3 represents ethylene, isopropylene, or n-propylene, and p represents an integer from 3 to 10. Preferably, R1 and R2 in formula (1) are organic groups with 6 to 10 carbon atoms.

[0223] The plasticizer preferably comprises triethylene glycol di-2-ethylhexanoate (3GO), triethylene glycol di-2-ethylbutyrate (3GH), or triethylene glycol di-2-ethylpropionate. More preferably, the plasticizer comprises triethylene glycol di-2-ethylhexanoate (3GO) or triethylene glycol di-2-ethylbutyrate (3GH), and even more preferably, it comprises triethylene glycol di-2-ethylhexanoate (3GO).

[0224] In the interlayer, the content of the plasticizer is set to content (0) relative to 100 parts by weight of the resin (100 parts by weight of the thermoplastic resin when the resin is a thermoplastic resin; 100 parts by weight of the polyvinyl acetal resin when the resin is a polyvinyl alcohol acetal resin). 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 even more preferably 50 parts by weight or less. If the content (0) is above the lower limit, the penetration resistance of the laminated glass is further improved. If the content (0) is below the upper limit, the transparency of the interlayer is further improved.

[0225] <Coloring agent>

[0226] The intermediate film preferably contains a colorant. The first layer preferably contains a colorant. The second layer preferably contains a colorant. The third layer may or may not contain a colorant. The fourth layer may or may not contain a colorant. At least one of the first layer and the second layer preferably contains a colorant. More preferably, both the first layer and the second layer contain a colorant.

[0227] Examples of colorants include inorganic particles, dyes, and pigments. A single colorant may be used, or two or more may be used in combination.

[0228] Examples of such inorganic particles include: carbon black particles, carbon nanotube particles, graphene particles, iron oxide particles, zinc oxide particles, calcium carbonate particles, aluminum oxide particles, kaolin clay particles, calcium silicate particles, magnesium oxide particles, magnesium hydroxide particles, aluminum hydroxide particles, magnesium carbonate particles, talc particles, feldspar powder particles, mica particles, barite particles, barium carbonate particles, titanium oxide particles, silicon dioxide particles, and glass beads. Only one type of inorganic particle may be used, or two or more types may be used in combination.

[0229] The inorganic particles preferably include carbon black particles, carbon nanotube particles, graphene particles, calcium carbonate particles, titanium dioxide particles, or silicon dioxide particles, more preferably carbon black particles or calcium carbonate particles, and even more preferably carbon black particles. By using these preferred inorganic particles, laminated glass with better appearance design can be obtained, which can suppress unevenness in appearance during light transmission.

[0230] The average particle size of the inorganic particles is preferably 0.01 μm or more, more preferably 0.5 μm or more, more preferably 100 μm or less, more preferably 50 μm or less, and even more preferably 10 μm or less. The average particle size refers to the weight-average particle size. The average particle size can be measured using a light scattering measuring device, employing a laser as the light source and a dynamic light scattering method. Examples of such light scattering measuring devices include, for instance, the "DLS-6000AL" manufactured by OTSUKA ELE CTRONICS.

[0231] Examples of dyes include pyrene dyes, aminoketone dyes, anthraquinone dyes, and azo dyes. A single dye may be used, or two or more may be used in combination.

[0232] Examples of pyrene dyes include Solvent Green5 (CAS79869-59-3) and Solvent Green7 (CAS6358-69-6).

[0233] Examples of aminoketone dyes include: Solvent Yellow 98 (CAS12671-74-8), Solvent Yellow 85 (CAS12271-01-1), Solvent Red 179 (CAS8910-94-5), and Solvent Red 135 (CAS71902-17-5).

[0234] Examples of anthraquinone dyes include: Solvent Yellow 163 (CAS13676091-0), Solvent Red 207 (CAS15958-69-6), Disperse Red 92 (CAS12236-11-2), Solvent Violet 13 (CAS81-48-1), Disperse Violet 31 (CAS6408-72-6), Solvent Blue 97 (CAS 61969-44-6), Solvent Blue 45 (CAS37229-23-5), Solvent Blue 104 (CAS116-75-6), and Disperse Blue 214 (CAS104491-84-1).

[0235] Examples of azo dyes include Solvent Yellow 30 (CAS3321-10-4), Solvent Red 164 (CAS70956-30-8), and Disperse Blue 146 (CAS88650-91-3).

[0236] The pigment can be an organic pigment or an inorganic pigment. The organic pigment can be an organic pigment containing metal atoms or an organic pigment without metal atoms. Only one type of pigment can be used, or two or more types can be used in combination.

[0237] Examples of organic pigments include phthalocyanine compounds, quinacridone compounds, azo compounds, dibenzophenanthrene compounds, perylene compounds, indole compounds, and dioxazine compounds.

[0238] The first layer preferably comprises carbon black particles, carbon nanotube particles, graphene particles, calcium carbonate particles, titanium oxide particles, silicon dioxide particles, or phthalocyanine compounds, more preferably calcium carbonate particles or carbon black particles, and even more preferably carbon black particles. The second layer preferably comprises carbon black particles, carbon nanotube particles, graphene particles, calcium carbonate particles, titanium oxide particles, silicon dioxide particles, or phthalocyanine compounds, more preferably calcium carbonate particles or carbon black particles, and even more preferably carbon black particles. The third layer preferably comprises carbon black particles, carbon nanotube particles, graphene particles, calcium carbonate particles, titanium oxide particles, silicon dioxide particles, or phthalocyanine compounds, more preferably calcium carbonate particles or carbon black particles, and even more preferably carbon black particles. By using these components, laminated glass that can suppress uneven appearance and has better design during light transmission can be obtained.

[0239] When the interlayer film and the laminated glass Y have a first non-gradient region and a second non-gradient region, the total content of colorant contained in each layer of the interlayer film constituting the first non-gradient region is taken as content (Y), and the total content of colorant contained in each layer of the interlayer film constituting the second non-gradient region is taken as content (Z). The weight ratio of content (Z) to content (Y) (content (Z) / content (Y)) is preferably 0.15 or more, more preferably 0.2 or more, preferably 0.95 or less, and more preferably 0.85 or less. If the weight ratio (content (Z) / content (Y)) is above the lower limit and below the upper limit, the absolute value of the difference between the first visible light transmittance and the second visible light transmittance can be easily controlled, and the overall appearance integrity can be further improved.

[0240] <Other Ingredients>

[0241] The intermediate film, the first layer, the second layer, the third layer, and the fourth layer may, as needed, contain additives such as heat-insulating particles, light-blocking agents, colorants, ultraviolet absorbers, antioxidants, adhesion modifiers, light stabilizers, flame retardants, antistatic agents, moisture-resistant agents, heat reflectors, and heat absorbers. Only one type of additive may be used, or two or more may be used in combination.

[0242] The first layer may contain the heat-insulating particles. The second layer may also contain the heat-insulating particles. The third layer may also contain the heat-insulating particles. The fourth layer may also contain the heat-insulating particles. At least one layer of the interlayer film constituting the colored region preferably contains heat-insulating particles. Infrared radiation, with wavelengths longer than visible light (above 780 nm), has less energy than ultraviolet radiation. However, infrared radiation has a strong thermal effect; it is released as heat after being absorbed by a substance. Therefore, infrared radiation is often referred to as heat radiation. By using the heat-insulating particles, infrared radiation (heat radiation) can be effectively blocked. It should be noted that heat-insulating particles refer to particles that can absorb infrared radiation. By including heat-insulating particles in the interlayer film, the laminated glass can achieve good heat insulation and aesthetic design.

[0243] Specific examples of the heat-insulating 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), 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, silicon-doped zinc oxide particles, and other metal oxide particles, as well as lanthanum hexaboride (LaB6) particles. Other heat-insulating particles may also be used. Only one type of heat-insulating particle may be used, or two or more may be used in combination.

[0244] The average particle size of the heat-insulating particles is preferably 10 nm or more, more preferably 20 nm or more, more preferably 100 nm or less, more preferably 80 nm or less, and even more preferably 50 nm or less. If the average particle size is above or below the lower limit, the shielding effect of the heat wire can be sufficiently improved. When the average particle size is below the upper limit, the dispersibility of the heat-insulating particles becomes higher.

[0245] The term "average particle size" refers to the volume average particle size. The average particle size can be measured using a particle size distribution measuring device (such as the "UPA-EX150" manufactured by Nikkiso Corporation).

[0246] <Combination with other functional membranes>

[0247] The intermediate film may also include other functional films to perform other functions. Examples of such functional films include infrared reflective films, colored films, and films with printed designs. For example, to improve heat insulation, the intermediate film may also include an infrared reflective film. For example, to further enhance design or combine with other patterns, the intermediate film may include a colored film or a film with printed designs.

[0248] The intermediate film having the functional film preferably has the first layer and the second layer disposed on the first surface side of the functional film, the third layer disposed on the second surface side of the functional film opposite to the first surface, and the second layer disposed between the first layers. It should be noted that in the intermediate film having the functional film, the layer disposed on the first surface side of the functional film can be a single layer or multiple layers. In the intermediate film having the functional film, the layer disposed on the second surface side of the functional film can be a single layer or multiple layers. The intermediate film having the functional film may have the first layer, the second layer, and the third layer on the first surface side of the functional film, or it may have the first layer, the second layer, the third layer, and the fourth layer. Furthermore, the intermediate film having the functional film may also have the third layer and the fourth layer on the second surface side of the functional film.

[0249] Examples of infrared reflective films include resin films with metal foil, multilayer films with metal and dielectric layers formed on the resin film, multilayer resin films, and liquid crystal films. These films have the property of reflecting infrared light.

[0250] The resin film with metal foil comprises a resin film and a metal foil laminated on the outer surface of the resin film. Examples of materials for the resin film include: polyethylene terephthalate resin, polyethylene naphthalate resin, polyvinyl alcohol acetal resin, ethylene-vinyl acetate copolymer resin, ethylene-acrylic acid copolymer resin, polyurethane resin, polyvinyl alcohol resin, polyolefin resin, polyvinyl chloride resin, and polyimide resin. Examples of materials for the metal foil include aluminum, copper, silver, gold, palladium, and alloys containing them.

[0251] A multilayer film with metal and dielectric layers formed on the resin film is a multilayer film in which metal and dielectric layers are alternately stacked on the resin film in any number of layers. It should be noted that in the multilayer film with metal and dielectric layers formed on the resin film, it is preferable that all metal and dielectric layers are stacked alternately, but it is also possible to have a structure in which some layers are not stacked alternately, such as metal layer / electrostatic layer / metal layer / electrostatic layer / metal layer / electrostatic layer / metal layer.

[0252] Examples of materials used for the resin film in the multilayer laminated film include: polyethylene, polypropylene, polylactic acid, poly(4-methylpentene-1), polyvinylidene fluoride, cyclic polyolefins, polymethyl methacrylate, polyvinyl chloride, polyvinyl alcohol, nylon 6, 11, 12, 66, and other polyamides, polystyrene, polycarbonate, polyethylene terephthalate, polyethylene naphthalate, polyester, polyphenylene sulfide, and polyetherimide. Examples of materials used for the metal layer in the multilayer laminated film include the same materials used for the metal foil in the resin film with the metal foil. A coating of metal or a mixture of metal oxides may be applied to one or both sides of the metal layer. Examples of materials used for this coating include ZnO, Al2O3, Ga2O3, InO3, MgO, Ti, NiCr, and Cu. Furthermore, examples of materials used for the dielectric layer in the multilayer laminated film include indium oxide.

[0253] The multilayer resin film is a laminated film consisting of multiple resin films stacked together. As a material for the multilayer resin film, materials identical to those used for the resin films in the multilayer laminated film can be used. The number of resin films stacked in the multilayer resin film is 2 or more, 3 or more, or 5 or more. The number of resin films stacked in the multilayer resin film can be less than 1000, less than 100, or less than 50.

[0254] The multilayer resin film can be a multilayer resin film formed by alternating or randomly stacking two or more thermoplastic resin layers with different optical properties (refractive indices) in any number of layers. Such a multilayer resin film is configured to obtain the desired infrared reflectivity.

[0255] Examples of liquid crystal films include those formed by stacking cholesteric liquid crystal layers that reflect light of any wavelength in any number of layers. Such liquid crystal films are configured to achieve the desired infrared reflectivity.

[0256] Infrared reflective films can contain infrared reflective particles. These infrared reflective particles are particles with infrared reflective properties, such as flat plate particles with a thickness of 1 nm to 1000 μm. For example, in a resin film containing dispersed silver nanoplate particles, by adjusting the thickness, surface area, and arrangement of the silver nanoplate particles, an infrared reflective film with infrared reflective properties can be obtained.

[0257] (First and second laminated glass components)

[0258] Examples of the first and second laminated glass components include glass sheets and PET (polyethylene terephthalate) films. The laminated glass includes not only laminated glass with an interlayer film sandwiched between two glass sheets, but also laminated glass with an interlayer film sandwiched between a glass sheet and a PET film, etc. The laminated glass is a stacked body comprising glass sheets, and preferably uses at least one glass sheet. Preferably, the first and second laminated glass components are either glass sheets or PET (polyethylene terephthalate) films, and the laminated glass, as the first and second laminated glass components, comprises at least one glass sheet. It is particularly preferred that both the first and second laminated glass components are glass sheets.

[0259] Examples of glass sheets include inorganic glass and plexiglass. Examples of inorganic glass include float glass, heat-absorbing glass, heat-reflecting glass, polished glass, profiled glass, mesh glass, wire-reinforced glass, and green glass. Plexiglass is a synthetic resin glass that replaces inorganic glass. Examples of plexiglass include polycarbonate sheets and poly(meth)acrylic resin sheets. Examples of poly(meth)acrylic resin sheets include polymethyl methacrylate sheets.

[0260] The thickness of the first and second laminated glass components is not particularly limited, but is preferably 1 mm or more, and more preferably 5 mm or less. When the laminated glass component is a glass sheet, the thickness of the glass sheet is preferably 1 mm or more, and more preferably 5 mm or less. When the laminated glass component is a PET film, the thickness of the PET film is preferably 0.03 mm or more, and more preferably 0.5 mm or less.

[0261] The thickness of the first and second laminated glass components represents the average thickness.

[0262] (Further details on interlayer and laminated glass)

[0263] The intermediate film has one end and another end located on the opposite side of the first end. The first end and the other end are the opposite ends of the intermediate film. The intermediate film may be an intermediate film with the same thickness at the first end and the same thickness at the other end, or an intermediate film with the other end having a greater thickness than the first end, or an intermediate film with the first end having a greater thickness than the other end.

[0264] The maximum thickness of the intermediate film is preferably 0.1 mm or more, more preferably 0.25 mm or more, even more preferably 0.5 mm or more, particularly preferably 0.8 mm or more, preferably 3.8 mm or less, more preferably 2 mm or less, and even more preferably 1.5 mm or less.

[0265] From a practical point of view and from the point of view of fully improving adhesion and penetration resistance, the maximum thickness of the surface layer of the intermediate film is preferably 0.001 mm or more, more preferably 0.2 mm or more, even more preferably 0.3 mm or more, preferably 1 mm or less, and more preferably 0.8 mm or less.

[0266] From a practical point of view and from the point of view of fully improving penetration resistance, the maximum thickness of the layer (intermediate layer) disposed between the two surface layers of the intermediate film is preferably 0.001 mm or more, more preferably 0.1 mm or more, more preferably 0.2 mm or more, preferably 0.8 mm or less, more preferably 0.6 mm or less, and more preferably 0.3 mm or less.

[0267] The interlayer film and laminated glass of the present invention can be used in automobiles, railway vehicles, aircraft, ships, and buildings. The interlayer film and laminated glass of the present invention are preferably used in rear windshields, sunroofs, or integrated rear windshield / sunroof glass, and more preferably in integrated rear windshield / sunroof glass.

[0268] Examples of methods for manufacturing the intermediate membrane include manufacturing method (1) and manufacturing method (2). It should be noted that the intermediate membrane can also be manufactured using other methods.

[0269] Manufacturing method (1): A composition (composition containing a colorant) for forming a first layer from a first extruder and a composition (composition containing a colorant) for forming a second layer from a second extruder are co-extruded. When the composition for forming the second layer is supplied from the second extruder, the gradient pattern is controlled by a slit within a feed block positioned in front of a metal die. It should be noted that the slit thickness is reduced at at least one end of the slit. The first and second layers can be merged within the feed block to obtain an intermediate film containing a specific second layer.

[0270] Manufacturing method (2): A composition (containing a colorant) for forming layers 1 and 3 from a first extruder, a composition (containing a colorant) for forming layer 2 from a second extruder, and a composition (not containing a colorant) for forming layer 4 from a third extruder are co-extruded. The compositions for forming layers 1 and 3 extruded from the first extruder are split by a feed block disposed in front of a metal die and disposed at the positions of the surface layers. When the composition for forming layer 2 is supplied from the second extruder, the gradient pattern is controlled by slits disposed in the feed block in front of the metal die. It should be noted that the slit thickness is reduced at at least one end of the slit. Layers 1, 2, 3, and 4 can be merged within the feed block to obtain an intermediate film containing a specific layer 2.

[0271] The following methods can be cited as methods for preparing the laminated glass.

[0272] An intermediate film is sandwiched between the first and second laminated glass components to obtain a laminate. Next, for example, the air remaining between the first, second, and intermediate glass components is degassed by passing the laminate through a pressure roller or placing it in a rubber bag. Then, pre-bonding is performed at approximately 70°C to 110°C to obtain a pre-pressed laminate. Next, the pre-pressed laminate is placed in an autoclave or pressed at approximately 120°C to 150°C and a pressure of 1 MPa to 1.5 MPa. This yields laminated glass.

[0273] The present invention will be described in more detail below with reference to embodiments and comparative examples. The present invention is not limited to these embodiments.

[0274] In the polyvinyl acetal resins used, butyraldehyde with four carbon atoms is used in the acetalization process. Regarding polyvinyl acetal resins, the degree of acetalization (degree of butyraldehyde), degree of acetylation, and hydroxyl content are determined according to the method based on JIS K6728 "Test Method for Polyvinyl Butyraldehyde". It should be noted that when measured according to ASTM D1396-92, the same values ​​as those based on JIS K6728 "Test Method for Polyvinyl Butyraldehyde" are also observed.

[0275] (Example 1)

[0276] Preparation of the composition for forming the first layer:

[0277] 100 parts by weight of polyvinyl butyral resin, 40 parts by weight of plasticizer (3GO) and 0.022 parts by weight of carbon black particles (colorant) are combined and thoroughly mixed with a mixing roller to obtain a composition for forming the first layer.

[0278] Preparation of the composition for forming the second layer:

[0279] 100 parts by weight of polyvinyl butyral resin, 40 parts by weight of plasticizer (3GO) and 0.331 parts by weight of carbon black particles (colorant) are combined and thoroughly mixed with a mixing roller to obtain a composition for forming the second layer.

[0280] Preparation of the intermediate membrane:

[0281] have Figure 1 The intermediate membrane of the structure shown is prepared as follows.

[0282] The composition for forming the first layer from the first extruder and the composition for forming the second layer from the second extruder are co-extruded. When the composition for forming the second layer is supplied from the second extruder, the gradient pattern is controlled by a slit within a feed block positioned in front of the metal die. It should be noted that the slit thickness at at least one end is reduced. The first and second layers are then joined in the feed block to obtain an intermediate film. It should be noted that the extrusion temperature is set to 200°C.

[0283] The distance between the two ends of the interlayer membrane (length in the width direction, referred to as "length (distance between one end and the other end)" in the table) is 200 cm. The distance in the direction orthogonal to the direction (width direction) connecting the two ends of the interlayer membrane is 50 cm. In the planar direction of the interlayer membrane, the lengths of the non-gradient portion and the gradient portion of the second layer are set as shown in Table 1 below.

[0284] Preparation of laminated glass:

[0285] Prepare two pieces of transparent glass (2mm thick, 200cm long, 50cm wide) according to JIS R3202:1996. A middle film is sandwiched between these two pieces of transparent glass, with the longitudinal direction of the transparent glass aligned with the direction connecting one and the other ends of the middle film, and the transverse direction of the transparent glass aligned with the direction orthogonal to the direction connecting one and the other ends of the middle film. Then, vacuum pressing is performed at 90°C for 30 minutes using a vacuum sealer to obtain laminated glass. It should be noted that the obtained laminated glass is equivalent to the aforementioned laminated glass X.

[0286] (Examples 2-4)

[0287] Except for changes to the content of colorant and the composition of the interlayer as described in Tables 1 and 2, the interlayer and laminated glass were prepared in the same manner as in Example 1.

[0288] (Example 5)

[0289] Except for using calcium carbonate particles as a colorant in the amounts shown in Table 2, and changing the composition of the interlayer as described in Table 2, the interlayer and laminated glass were prepared in the same manner as in Example 1.

[0290] (Example 6)

[0291] Preparation of compositions for forming the first and third layers:

[0292] 100 parts by weight of polyvinyl butyral resin, 40 parts by weight of plasticizer (3GO) and 0.027 parts by weight of carbon black particles (colorant) are combined and thoroughly mixed with a mixing roller to obtain a composition for forming the first and third layers.

[0293] Preparation of the composition for forming the second layer:

[0294] 100 parts by weight of polyvinyl butyral resin, 40 parts by weight of plasticizer (3GO) and 0.340 parts by weight of carbon black particles (colorant) are combined and thoroughly mixed with a mixing roller to obtain a composition for forming the second layer.

[0295] Preparation of the composition for forming the fourth layer:

[0296] 100 parts by weight of polyvinyl butyral resin and 60 parts by weight of plasticizer (3GO) were combined and thoroughly mixed with a mixing roller to obtain a composition for forming the fourth layer.

[0297] Preparation of the intermediate membrane:

[0298] have Figure 3 The intermediate membrane with the structure shown is prepared as follows.

[0299] Compositions (compositions containing colorants) for forming layers 1 and 3 from a first extruder, composition (compositions containing colorants) for forming layer 2 from a second extruder, and composition (compositions without colorants) for forming layer 4 from a third extruder are co-extruded. The compositions for forming layers 1 and 3 extruded from the first extruder are split by a feed block positioned in front of a metal die and disposed at the surface layer locations. When the composition for forming layer 2 is supplied from the second extruder, a gradient pattern is controlled by slits within the feed block positioned in front of the metal die. It should be noted that the slit thickness is reduced at at least one end. An intermediate film is obtained by merging layers 1, 2, 3, and 4 within the feed block. It should be noted that the extrusion temperature is set to 200°C.

[0300] The distance between the two ends of the interlayer membrane (length in the width direction, referred to as "length (distance between one end and the other end)" in the table) is 200 cm. The distance in the direction orthogonal to the direction (width direction) connecting the two ends of the interlayer membrane is 50 cm. In the planar direction of the interlayer membrane, the lengths of the non-gradient portion and the gradient portion of the second layer are set as shown in Table 3 below.

[0301] Preparation of laminated glass:

[0302] Except for using the obtained intermediate film, laminated glass is obtained in the same manner as in Example 1. It should be noted that the obtained laminated glass is also equivalent to the laminated glass X.

[0303] (Examples 7-16 and Comparative Examples 1 and 2)

[0304] Except for changes to the colorant content and the composition of the interlayer as described in Tables 3-6, the interlayer and laminated glass were prepared in the same manner as in Example 6. It should be noted that the content of the colorant used to form the third layer was set to be the same as the content of the colorant used to form the first layer. No colorant was used in the fourth layer.

[0305] (Example 17)

[0306] Except for changing the content of the colorant and the composition of the interlayer as described in Table 6, the interlayer and laminated glass were prepared in the same manner as in Example 1.

[0307] (Examples 18-27)

[0308] Except for changes to the content of colorant, the composition of the interlayer film, and the composition of the laminated glass as described in Tables 7-9, the interlayer film and laminated glass were prepared in the same manner as in Example 1.

[0309] (evaluate)

[0310] (1) Visible light transmittance of laminated glass

[0311] The visible light transmittance of the laminated glass in the wavelength range of 380 nm to 780 nm was measured using a spectrophotometer (HITACHI HIGH-TECH "U-4100") based on JISR 3106:1998.

[0312] Based on the visible light transmittance of the obtained laminated glass, the following values ​​are shown in Tables 1 to 9 below.

[0313] 1) The area (%) of the colored region with a visible light transmittance of 1% to 50% out of 100% of the total planar area of ​​the interlayer film or the total planar area of ​​the laminated glass.

[0314] 2) The planar area (%) of the first non-gradient region out of 100% of the total planar area of ​​the interlayer or the total planar area of ​​the laminated glass.

[0315] 3) The planar area (%) of the gradient region out of 100% of the total planar area of ​​the interlayer or the total planar area of ​​the laminated glass.

[0316] 4) The planar area (%) of the second non-gradient region out of 100% of the total planar area of ​​the interlayer or the total planar area of ​​the laminated glass.

[0317] 5) First visible light transmittance (%) (Visible light transmittance of the laminated glass at a position 5cm from one end of the interlayer or laminated glass to the other end)

[0318] 6) Second visible light transmittance (%) (Visible light transmittance of the laminated glass at a position 5cm from one end of the interlayer or laminated glass towards the other end)

[0319] 7) The absolute value (%) of the difference between the first visible light transmittance and the second visible light transmittance.

[0320] 8) The maximum absolute value (% / mm) of the change in visible light transmittance in the colored area when one end of the interlayer or laminated glass faces the other.

[0321] (2) Overall appearance

[0322] Laminated glass was installed at a 30-degree angle relative to the horizontal direction. Twenty evaluators observed the laminated glass as a whole from a distance of 3 meters and judged its appearance integrity according to the following criteria. Tables 1-9 record the number of people who were judged as ○.

[0323] [Criteria for Determining the Unity of Appearance]

[0324] ○ (Good): The boundaries of color variations are not easily visible to the naked eye; the laminated glass can be visually inspected as a whole.

[0325] × (Defect): The boundaries of color variations are easily visible to the naked eye; the laminated glass cannot be visually inspected as a whole.

[0326] The composition and results of the interlayer and laminated glass are shown in Tables 1-9 below. It should be noted that the types of laminated glass components in the tables show the type of the first laminated glass component and the type of the second laminated glass component. The thicknesses of the laminated glass components in the tables show the thickness of the first laminated glass component and the thickness of the second laminated glass component. Regarding the types of laminated glass components in the tables, "C" refers to clear glass, "G" refers to green glass, "A" refers to high-transparency glass (Gorilla Glass manufactured by Corning), and "B" refers to borosilicate glass. Regarding the types of colorants in the tables, "CB" refers to carbon black particles, "CCA" refers to calcium carbonate particles, "Pc" refers to copper phthalocyanine particles (Pigment Blue 15-1), and "P" refers to perylene particles (Pigment Red 149). In ※1 of the tables, "planar area of ​​the colored region" refers to "the planar area of ​​the colored region with a visible light transmittance of 1% to 50% out of 100% of the total planar area." In Table ※2, “maximum absolute value of the percentage change in visible light transmittance” means “the maximum absolute value of the percentage change in visible light transmittance in the colored region from one end to the other.” In Table ※3, “weight ratio of colorant in the two regions” means “total content of colorant contained in each layer of the intermediate film constituting the second non-gradient region / total content of colorant contained in each layer of the intermediate film constituting the first non-gradient region.”

[0327] [Table 1]

[0328]

[0329] [Table 2]

[0330]

[0331] [Table 3]

[0332]

[0333] [Table 4]

[0334]

[0335] [Table 5]

[0336]

[0337] [Table 6]

[0338]

[0339] [Table 7]

[0340]

[0341] [Table 8]

[0342]

[0343] [Table 9]

[0344]

[0345] Symbol Explanation

[0346] 1, 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I… Level 1

[0347] 2, 2A, 2B, 2C, 2D, 2E, 2F, 2G, 2H, 2I… Level 2

[0348] 2X, 2AX, 2BX, 2FX, 2GX, 2HX, 2IX… Gradient section

[0349] 2Y, 2AY, 2BY, 2CY, 2DY, 2EY… Non-gradient sections

[0350] 3A, 3B, 3D, 3E, 3G, 3H… Level 3

[0351] 4A, 4B, 4D, 4E, 4G, 4H… Level 4

[0352] 11, 11A, 11B, 11C, 11D, 11E, 11F, 11G, 11H, 11I… intermediate membrane

[0353] 11a, 11Aa, 11Ba, 11Ca, 11Da, 11Ea, 11Fa, 11Ga, 11Ha, 11Ia… one end (one end of the intermediate membrane)

[0354] 11b, 11Ab, 11Bb, 11Cb, 11Db, 11Eb, 11Fb, 11Gb, 11Hb, 11Ib… the other end (the other end of the intermediate membrane)

[0355] 21…First laminated glass component

[0356] 22…Second laminated glass component

[0357] 31, 31A, 31B, 31C, 31D, 31E, 31F, 31G, 31H, 31I… laminated glass

[0358] 31a, 31Aa, 31Ba, 31Ca, 31Da, 31Ea, 31Fa, 31Ga, 31Ha, 31Ia… one end (one end of the laminated glass)

[0359] 31b, 31Ab, 31Bb, 31Cb, 31Db, 31Eb, 31Fb, 31Gb, 31Hb, 31Ib… the other end (the other end of the laminated glass)

[0360] Q…coloring agent

[0361] R…colored area

[0362] RX…gradient area

[0363] RY…First non-gradient region

[0364] RZ…Second Non-gradient Region

Claims

1. An interlayer for laminated glass, comprising an interlayer for laminated glass having one end and another end located on the opposite side of said one end, wherein, When an interlayer is placed between two pieces of transparent glass based on JIS R3202:1996 to obtain laminated glass X, The interlayer film has a colored region in which the visible light transmittance of the laminated glass X is more than 1% and less than 50%. Of the total planar area of ​​the intermediate film (100%), the planar area of ​​the colored region accounts for more than 95%. The first visible light transmittance of the laminated glass X at a position 5 cm from one end toward the other end of the interlayer is less than the second visible light transmittance of the laminated glass X at a position 5 cm from the other end toward one end of the interlayer. The first visible light transmittance is between 1% and 20%. The second visible light transmittance is between 5% and 35%. The absolute value of the difference between the first visible light transmittance and the second visible light transmittance is more than 2% and less than 30%.

2. The interlayer film for laminated glass according to claim 1, wherein, Of the total planar area of ​​the intermediate film, which is 100%, the planar area of ​​the colored region is 100%.

3. The interlayer film for laminated glass according to claim 1 or 2, wherein, The colored region comprises: a first non-gradient region in which the visible light transmittance of the laminated glass X remains completely unchanged from one end of the interlayer film toward the other end, and a second non-gradient region in which the visible light transmittance of the laminated glass X remains completely unchanged from one end of the interlayer film toward the other end. The first non-gradient region is closer to one end than the second non-gradient region.

4. The interlayer film for laminated glass according to claim 3, wherein, The total content of colorants contained in each layer of the intermediate film constituting the second non-gradient region is 0.15 to 0.95 by weight relative to the total content of colorants contained in each layer of the intermediate film constituting the first non-gradient region.

5. The interlayer film for laminated glass according to claim 3, wherein, The colored region has a gradient region in which the visible light transmittance of the laminated glass X increases from one end of the interlayer towards the other end. The first non-gradient region is closer to one end than the gradient region. The second non-gradient region is closer to the other end than the gradient region.

6. The interlayer film for laminated glass according to claim 1 or 2, wherein, The colored region has only a gradient region in which the visible light transmittance of the laminated glass X increases from one end of the interlayer film toward the other end.

7. The interlayer for laminated glass according to claim 1 or 2, wherein, At least one layer of the intermediate film constituting the colored region contains heat-insulating particles.

8. The interlayer film for laminated glass according to claim 1 or 2, which is used for rear windshield glass, sunroof glass or integrated rear windshield and sunroof glass.

9. A laminated glass comprising: First laminated glass component; The second laminated glass component; and Interlayer for laminated glass according to any one of claims 1 to 8 The interlayer of the laminated glass is disposed between the first laminated glass component and the second laminated glass component.

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