Glass plate structure and method for manufacturing a glass plate structure

Abstract

This glass sheet structure body is provided with a first sheet material and a second sheet material disposed so as to overlap each other in the sheet thickness direction, and an intermediate layer provided between the first sheet material and the second sheet material. At least one of the first sheet material and the second sheet material is a glass sheet. The first sheet material and the second sheet material are each a sheet provided with a curved surface having a protruding-side main surface that protrudes in the sheet thickness direction and a recess-side main surface on the opposite side of the protruding-side main surface. The recess-side main surface of the first sheet material and the protruding-side main surface of the second sheet material are brought so as to face each other and are overlapped. The radius of curvature of the recess-side main surface of the first sheet material is less than the radius of curvature of the protruding-side main surface of the second sheet material.

Description

[Technical Field]

[0001] This invention relates to a glass plate structure and a method for manufacturing a glass plate structure. [Background technology]

[0002] Using a material with a fast sound propagation speed (hard and light) as the diaphragm for a speaker or microphone increases the resonant frequency of the diaphragm's partial vibration, resulting in a wider bandwidth and better responsive sound quality. For this reason, glass, a material with a fast sound propagation speed, is attracting attention as a diaphragm material. In addition, although sounds in the high-frequency range above 20 kHz are difficult for the human ear to hear, they are perceived as having a strong sense of presence, so faithful reproduction of high-frequency sounds is also required. As a configuration of a glass plate that exhibits good acoustic performance even in such high-frequency ranges, for example, Patent Document 1 describes a glass plate structure in which a liquid layer is provided between at least one pair of plate materials. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] International Publication No. 2017 / 175682 [Overview of the project] [Problems that the invention aims to solve]

[0004] When the glass plate structure described in Patent Document 1 has a curved shape, the overlapping plate materials also have a curved shape. Therefore, when overlapping plate materials, shape errors in the glass structure occur depending on the orientation of overlapping, such as whether the concave sides of the curved shapes are facing each other, or whether the convex side and concave side are facing each other. For example, if the convex side of one plate material is overlapped with the concave side of the other plate material facing each other, the gap between the plate materials tends to widen at the outer edges of the plate materials, and the relative position of the plate materials is unstable. In addition, in some cases, cracks or peeling may occur in the seal portion that seals the outer edges of the plate materials.

[0005] If air enters the pair of glass plates from the outer edge of the glass plate structure, bubbles will be mixed into the liquid layer, severely impairing its appearance. Furthermore, the damping effect of the bubbles will cause the vibrations of the pair of plates to not have the same amplitude, reducing the acoustic performance. In addition, the internal pressure and size of the bubbles will change depending on the ambient temperature, making it difficult to achieve good acoustic performance with accurate sound reproduction.

[0006] Therefore, the present invention aims to provide a glass plate structure and a method for manufacturing a glass plate structure that reduces shape errors after a pair of plate materials are stacked together, and prevents air from entering from the outer edges of the plate materials. [Means for solving the problem]

[0007] This invention consists of the following configuration. (1) A glass plate structure comprising a first plate material and a second plate material arranged to overlap each other in the thickness direction, and an intermediate layer provided between the first plate material and the second plate material, wherein at least one of the first plate material and the second plate material is a glass plate, Each of the first and second plates is a plate having a curved portion with a convex main surface protruding in the thickness direction and a concave main surface opposite to the convex main surface. The concave main surface of the first plate material and the convex main surface of the second plate material are superimposed on each other, A glass plate structure in which the radius of curvature of the concave main surface of the first plate material is smaller than the radius of curvature of the convex main surface of the second plate material. (2) A method for manufacturing a glass plate structure comprising a first plate material and a second plate material arranged to overlap each other in the thickness direction, and an intermediate layer provided between the first plate material and the second plate material, wherein at least one of the first plate material and the second plate material is a glass plate, Each of the first and second plates has a curved surface having a convex main surface protruding in the thickness direction and a concave main surface opposite to the convex main surface, and the radius of curvature of the concave main surface of the first plate is smaller than the radius of curvature of the convex main surface of the second plate. Providing an intermediate layer liquid agent and a sealing agent on at least a part of the concave main surface of the first plate material; Bonding the convex main surface of the second plate material to the concave main surface provided with the intermediate layer liquid agent and the sealing agent to obtain a laminate; Subjecting the laminate to reduced pressure; A method for manufacturing a glass plate structure, comprising the above steps.

Effect of the Invention

[0008] According to the present invention, it is possible to prevent air from entering from the outer edge portion of the plate material, and as a result, reduce the shape error after bonding a pair of plate materials.

Brief Description of the Drawings

[0009] [Figure 1A] FIG. 1A is a schematic cross-sectional view of a glass plate structure. [Figure 1B] FIG. 1B is a schematic cross-sectional view of another glass plate structure. [Figure 2A] FIG. 2A is a process explanatory diagram showing an outline of a procedure for manufacturing a glass plate structure. [Figure 2B] FIG. 2B is a process explanatory diagram showing an outline of a procedure for manufacturing a glass plate structure. [Figure 2C] FIG. 2C is a process explanatory diagram showing an outline of a procedure for manufacturing a glass plate structure. [Figure 2D] FIG. 2D is a process explanatory diagram showing an outline of a procedure for manufacturing a glass plate structure. [Figure 3A] FIG. 3A is a reference diagram showing another example of overlapping a first plate material and a second plate material. [Figure 3B] FIG. 3B is a reference diagram showing another example of overlapping a first plate material and a second plate material. [Figure 4] FIG. 4 is a contour diagram showing the result of measuring the distribution of the gap between the plate materials when the first plate material and the second plate material shown in FIGS. 3A and 3B are bonded together. [Figure 5] FIG. 5 is a contour diagram showing the result of measuring the distribution of the gap between the plate materials when the first plate material and the second plate material shown in FIG. 1 are bonded together. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will be described in detail below with reference to the drawings. The glass plate structure according to the present invention comprises a first plate material and a second plate material arranged to overlap each other in the thickness direction, and an intermediate layer provided between the first plate material and the second plate material. The intermediate layer may include a liquid layer, may consist only of a liquid layer, or may consist only of a solid phase. At least one of the first plate material and the second plate material is a glass plate. Each of the first plate material and the second plate material is a plate having a curved surface, and has a convex main surface protruding in the thickness direction and a concave main surface opposite the convex main surface. The concave main surface of the first plate material and the convex main surface of the second plate material are facing each other and overlapping, so that the concave and convex surfaces of each plate material overlap. The radius of curvature of the concave main surface of the first plate material is smaller than the radius of curvature of the convex main surface of the second plate material, so that the gap in the center is thicker than the gap in the outer edge of each plate material.

[0011] With the above configuration, the first and second plates overlap with a small gap at their outer edges, improving the stability of the overlapping plates and reducing shape errors. Furthermore, the thickness of the center of the intermediate layer is greater than the thickness of the outer edges of the plates, resulting in a small gap between the plates at their outer edges. Therefore, it becomes difficult for air to enter the intermediate layer from the outer edges of the plates. Thus, the glass plate structure according to the present invention does not leave air bubbles in the plate surface and reduces unevenness in the thickness of the liquid layer within the surface of each plate.

[0012] The following describes specific examples of glass plate structures. Figure 1A is a schematic cross-sectional view of the glass plate structure. The glass plate structure 100 comprises a first plate material 11 and a second plate material 13 arranged to overlap in the thickness direction, and an intermediate layer 15 provided between the first plate material 11 and the second plate material 13. The first plate material 11 and the second plate material 13 have the same shape in plan view. Therefore, the outer edges 17 of the overlapping first plate material 11 and the second plate material 13 are positioned to overlap each other. However, the first plate material 11 and the second plate material 13 may have different shapes in plan view.

[0013] The first plate material 11 and the second plate material 13 each have a certain thickness and have convex main surfaces 11a and 13a that protrude in the thickness direction, and concave main surfaces 11b and 13b opposite to the convex main surfaces 11a and 13a. The concave main surface 11b of the first plate material 11 and the convex main surface 13a of the second plate material 13 are facing each other and overlapping, and the radius of curvature R1 of the concave main surface 11b of the first plate material 11 is smaller than the radius of curvature R2 of the convex main surface 13a of the second plate material 13. As a result, the distance t in the thickness direction between the laminated first plate material 11 and the second plate material 13 widens from the outer edge 17 of the glass plate structure 100 toward the center.

[0014] The term "center" as used here refers to the portion (region) containing the centroid of the glass plate structure 100 when the glass plate structure 100 is placed on a plane with the concave main surfaces of the second plate material 13 facing each other, in a plan view (viewpoint from the direction normal to the plane). The center may be, for example, a continuous region that includes the centroid and has an area of ​​30% inside the outer edge 17, when the area of ​​the glass plate structure 100 in a plan view is considered to be 100%. The center may also be a continuous region of 20%, 10%, or 5% under the above conditions. The glass plate structure 100 may have a configuration in which the spacing t in the thickness direction gradually increases from the outer edge 17 toward the center of the glass plate structure 100 in a plan view, or it may be a configuration in which it gradually increases toward the centroid.

[0015] Furthermore, the gap between the first plate material 11 and the second plate material 13 at their outer edges 17 is smaller than the gap in the center of the plate surface. The spacing between the first plate material 11 and the second plate material 13 at their outer edges 17 is preferably 0.5 mm or less, more preferably 0.4 mm or less, even more preferably 0.3 mm or less, and particularly preferably 0.2 mm or less.

[0016] The outer edges of the first plate material 11 and the second plate material 13 are provided with sealing portions 19 that join the first plate material 11 and the second plate material 13 together, and the intermediate layer 15 is sealed within the internal space surrounded by the sealing portions 19.

[0017] Figure 1B is a schematic cross-sectional view of another glass plate structure, and the same parts as the glass plate structure 100 shown in Figure 1A are given the same numbers and their explanations are omitted. The glass plate structure 101 shown in Figure 1B has a first solid layer 31 between the first plate material 11 and the intermediate layer 15, and a second solid layer 33 between the second plate material 13 and the intermediate layer 15. The glass plate structure 101 may have only one of the first solid layer 31 and the second solid layer 33, or it may have both. For example, if either the first plate material 11 or the second plate material 13 is a glass plate, a solid layer may be provided between the glass plate and the intermediate layer 15. Also, if the first plate material 11 and the second plate material 13 are glass plates, it is preferable to have both the first solid layer 31 and the second solid layer 33.

[0018] The first solid layer 31 and the second solid layer 33 can be made of resin material, composite material, fiber material, metal material, etc., and may be a single layer or multiple layers. It is preferable that they contain resin material, and they may also be composed of resin material. Examples of resin material include PMMA resin, PI resin, PC resin, PS resin, PET resin, cellulose resin, PVA resin, and PVB resin. Furthermore, it is preferable that the first solid layer 31 and the second solid layer 33 are transparent in the visible light region and have a certain thickness. The thickness of the first solid layer 31 and the second solid layer 33 is preferably thinner than the first plate material 11 and the second plate material 13. For example, it may be 2 mm or less, preferably 1 mm or less, and more preferably 800 μm or less. There is no particular lower limit to the thickness of the first solid layer 31 and the second solid layer 33, but for example, it may be 100 nm or more.

[0019] Thus, the glass plate structure 101, by having at least one of the first solid layer 31 and the second solid layer 33, provides the effect of preventing scattering in the event of a glass plate breakage. In particular, when the first plate material 11 and the second plate material 13 are glass plates, it is preferable as it is easier to obtain the effect of penetration resistance in the event of a glass plate breakage. The first solid layer 31 may be provided on the entire convex surface of the first plate material 11, or on the portion excluding the outer edge 17 where the seal portion 19 is provided. Similarly, the second solid layer 33 may be provided on the entire concave surface of the second plate material 13, or on the portion excluding the outer edge 17 where the seal portion 19 is provided.

[0020] Figures 2A to 2D are process diagrams illustrating the general procedure for manufacturing the glass plate component 100. The glass plate structure 100 with the above configuration is first arranged as shown in Figure 2A, with the first plate material 11 facing upwards with the concave main surface 11b facing upwards. An intermediate layer liquid 21 and a sealant 23, which will form the intermediate layer 15, are applied to this concave main surface 11b as shown in Figure 2B. Here, the sealant 23 is applied to the outer edge 17 of the concave main surface 11b, and the intermediate layer liquid 21 is applied to the plate surface inside the outer edge 17 of the concave main surface 11b to which the sealant 23 has been applied. The intermediate layer liquid 21 and sealant 23 may be provided by methods other than application, such as spraying, transfer, etc. Furthermore, when manufacturing a glass plate structure 101 having at least one of the first solid layer 31 and the second solid layer 33, it is sufficient to first prepare at least one of a plate material in which the first solid layer 31 is bonded to the concave main surface 11b of the first plate material 11, and a plate material in which the second solid layer 33 is bonded to the convex main surface 13a of the second plate material 13, and then carry out the steps shown in Figures 2A to 2D.

[0021] Next, as shown in Figure 2C, the convex main surface 13a of the second plate material 13 is placed opposite the concave main surface 11b of the first plate material 11, which has been coated with the intermediate layer liquid 21 and sealant 23, and the second plate material 13 is bonded to the first plate material 11. Then, by subjecting the bonded laminate to reduced pressure, a glass plate structure 100 is obtained in which the space between the first plate material 11 and the second plate material 13 is filled with the intermediate layer liquid 21 and sealant 23, as shown in Figure 2D.

[0022] Figures 3A and 3B are reference diagrams showing other examples of the first and second boards being superimposed. In Figures 3A and 3B, the relationship between the radii of curvature of the first plate material 11A and the second plate material 13A is reversed, and the radius of curvature R1 of the concave main surface 11b of the first plate material 11A is greater than the radius of curvature R2 of the convex main surface 13a of the second plate material 13A. In this case, as shown in Figure 3A, the central part of the convex main surface 13a of the second plate material 13A is closest to the concave main surface 11b of the first plate material 11A, and the gap δ in the thickness direction widens at the outer edge 17. In this state, the relative position of the first plate material 11A and the second plate material 13A is unstable, and when manufacturing a large number of glass plate components, manufacturing variations become large.

[0023] Furthermore, when the first plate material 11A and the second plate material 13A are bonded together via the intermediate layer 15 in this state, as shown in Figure 3B, the seal portion 19 becomes thicker at the outer edge 17, and a recess 25 is formed toward the center of the plate surface. Depending on its size, the recess 25 may reach the intermediate layer 15, in which case air will enter the intermediate layer 15 and generate air bubbles within it.

[0024] Figure 4 is a contour map showing the distribution of the gap between the first plate material 11A and the second plate material 13A when they are bonded together, as shown in Figures 3A and 3B. This gap can be calculated by measuring the height distribution of the concave main surface 11b of the first plate material 11A and the height distribution of the convex main surface 13a of the second plate material 13A, and then determining the difference in height between corresponding positions on the plate surface. Methods for measuring the height distribution include fixed-point measurement using a contact-type sensor, non-contact measurement using a laser sensor, and analysis of image data captured from various directions using multiple cameras. The appropriate method is used depending on the conditions of the object to be measured.

[0025] In the case shown in Figure 4, the gap is small in the center of the board surface and becomes larger as you approach the outer edge of the board surface. In other words, peeling of the seal portion 19 is more likely to occur at the outer edge of the board surface, and air bubbles are more likely to enter the intermediate layer.

[0026] The gap between the outer edge 17 of the first plate material 11 and the second plate material 13 is filled by the applied intermediate layer 15 (intermediate layer liquid 21) and the sealing portion 19 (hereinafter also referred to as the coating liquid), and the gap is further reduced by the deflection that occurs between the plates. Furthermore, the viscosity of the coating liquid and the viscous frictional resistance between the first plate material and the second plate material maintain the sealing of the gap.

[0027] The viscous frictional resistance of the coating liquid between two sheet materials increases as the distance from the interface between the coating liquid and the sheet material decreases, according to Newton's law of viscosity. For example, in the case of a coating liquid with a viscosity of 3 Pa·S, the viscous friction coefficient (apparent viscosity) increases exponentially when the gap is 100 μm or less, and when the gap is 10 μm, the apparent viscosity becomes more than 30 times that of the case at 100 μm.

[0028] In the glass plate structure 100 of this configuration, the gap between the first plate material 11 and the second plate material 13 at the outer edge 17 is assumed to be at least 100 μm or less, preferably 50 μm or less, more preferably 30 μm or less, even more preferably 20 μm or less, especially preferably 15 μm or less, and particularly preferably 10 μm or less, regardless of the thickness of each plate material. Therefore, at the outer edge 17 after the air bubbles are discharged from the central part, the viscous frictional resistance between the coating liquid and the plate material will have a significant effect.

[0029] On the other hand, if the radii of curvature of the first plate material 11A and the second plate material 13A are reversed, as shown in Figures 3A and 3B, a gap will be created at the outer edges 17 of the first plate material 11A and the second plate material 13A because the plates do not interlock. This gap will widen as the plates bend in a direction that separates them when force is applied to each plate material. This widening of the gap is compensated for by the volume of the coating liquid and the viscosity and frictional resistance of the coating liquid, but the coating liquid is a viscous substance, and even if the coating liquid is highly viscous, the flow of the liquid cannot be stopped. Furthermore, as the gap widens, the frictional resistance decreases, the flow of the coating liquid becomes more active, and the bending of the plates cannot be suppressed.

[0030] Therefore, it is conceivable to give the coating liquid a viscosity that can withstand the bending of the plate material, but in that case, the viscosity would effectively need to be several tens of times greater than normal. As a result, when bubbles are released, the gas cannot pass through the coating liquid (sealing part), and bubbles cannot be released.

[0031] Furthermore, if the volume of the coating solution is increased to the point where there is no bending of the plate material, the frictional resistance becomes almost zero, and the coating solution becomes more prone to movement. As a result, dripping and misalignment of the plate materials are more likely to occur, and gaps may form at the edges of the substrate. Thus, with combinations of opposite radii of curvature, it is extremely difficult to ensure airtight sealing of the gap at the outer edge 17, and it is difficult to obtain a glass plate structure with a good appearance.

[0032] In contrast, in the case of stacking the glass plate components 100 shown in Figure 1, the gap becomes smaller as you move from the center of the plate material towards the outer edge 17, and the frictional resistance of the coating liquid is maximum at the tip. Therefore, leakage of the coating liquid is prevented, and since the coating liquid is not crushed when air bubbles are discharged, it is possible to smoothly discharge air bubbles by passing through the coating liquid (seal portion 19).

[0033] Furthermore, the thickness of the first plate material 11 and the second plate material 13 does not significantly affect the deflection (Young's modulus of the material) as described above when the thickness ranges from 1.8 mm to 3.0 mm.

[0034] Figure 5 is a contour map showing the distribution of gaps between the first and second boards 11 and 13, as shown in Figure 1, when they are bonded together. The method for measuring the gaps is the same as in Figure 4. In the case shown in Figure 5, the gap is larger in the center of the board surface and becomes smaller as it approaches the outer edge of the board surface. As a result, it becomes more difficult for air bubbles to enter the intermediate layer from the outer edge of the board surface.

[0035] According to the glass plate structure 100 shown in Figure 1, when the intermediate layer 15 includes a liquid layer, the presence of the liquid layer prevents the surfaces of the first plate 11 and the second plate 13 from sticking together, unlike when a pair of plate materials are joined via an adhesive layer, thus maintaining the vibration characteristics of each plate material. For example, when the first plate material 11 resonates, the presence of the intermediate layer (liquid layer) 15 prevents the second plate material 13 from resonating, or attenuates the resonance oscillations of the second plate material 13. As a result, the glass plate structure 100 has a higher loss coefficient compared to the case of a single plate material.

[0036] It is preferable that the peak values ​​of the resonant frequencies of the first plate material 11 and the second plate material 13 are different, and it is even more preferable that their resonant frequency ranges do not overlap. However, even if the resonant frequency ranges of the first plate material 11 and the second plate material 13 overlap or their peak values ​​are the same, the presence of the intermediate layer (liquid layer) 15 prevents the vibration of the other plate material from synchronizing even if one plate material resonates, thus canceling out the resonance to some extent and resulting in a higher loss coefficient compared to the case of a single plate material.

[0037] In other words, when the resonant frequency (peak top) of one plate material is Qa, the half-width of the resonant amplitude is wa, the resonant frequency (peak top) of the other plate material is Qb, and the half-width of the resonant amplitude is wb, it is preferable that the following relationship [Equation 1] is satisfied. (wa+wb) / 4<|Qa-Qb|···[Equation 1] In [Equation 1], a larger value on the left side is preferable because it increases the difference in resonant frequencies between the plates (|Qa-Qb|), resulting in a higher loss coefficient.

[0038] Therefore, it is more preferable that the following [Equation 2] is satisfied, and it is even more preferable that the following [Equation 3] is satisfied. (wa+wb) / 2<|Qa-Qb|···[Equation 2] (wa+wb) / 1<|Qa-Qb|···[Equation 3] Furthermore, the resonant frequency (peak top) and the full width at half maximum of the resonant amplitude of the plate can be measured using the same method as for the loss coefficient in a glass plate structure.

[0039] The smaller the mass difference between the first plate 11 and the second plate 13, the better; it is even better if there is no mass difference. When there is a mass difference between the plates, the resonance of the lighter plate can be suppressed by the heavier plate, but it is difficult to suppress the resonance of the heavier plate with the lighter plate. In other words, if there is an imbalance in the mass ratio, the difference in inertial forces makes it impossible, in principle, to cancel out the resonant vibrations of the two plates.

[0040] The mass ratio of the first plate material 11 to the second plate material 13 (first plate material 11 / second plate material, or second plate material / first plate material) is preferably 0.8 to 1.25 (8 / 10 to 10 / 8), more preferably 0.9 to 1.1 (9 / 10 to 10 / 9), and even more preferably 1.0 (10 / 10).

[0041] The thinner the thickness of the first plate material 11 and the second plate material 13, the easier it is for the plates to adhere to each other via the intermediate layer (liquid layer) 15, and the easier it is for the plates to vibrate with less energy. Therefore, for applications such as diaphragms in speakers, thinner plates are preferable. Specifically, the thickness of plate material 11 and plate material 13 is preferably 15 mm or less, more preferably 10 mm or less, even more preferably 5 mm or less, even more preferably 3 mm or less, particularly preferably 1.5 mm or less, and particularly preferably 0.8 mm or less. On the other hand, if the thickness is too thin, the effects of surface defects in the plate material become more pronounced, making it easier for cracks to occur and making it difficult to perform strengthening treatment. Therefore, the thickness of plate material 11 and plate material 13 is preferably 0.01 mm or more, and more preferably 0.05 mm or more.

[0042] Furthermore, in applications for building and vehicle opening materials where the generation of abnormal noise caused by resonance is suppressed, the thickness of the first plate material 11 and the second plate material 13 is preferably 0.5 mm to 15 mm, more preferably 0.8 mm to 10 mm, and even more preferably 1.0 mm to 8 mm. For applications involving glass substrates for magnetic recording media with enhanced vibration damping, the thickness of the first plate material 11 and the second plate material 13 is preferably 0.3 mm to 1.2 mm, more preferably 0.4 mm to 1.0 mm, and even more preferably 0.5 mm to 0.8 mm.

[0043] For at least one of the first plate material 11 and the second plate material 13, a larger loss coefficient is preferable for diaphragm applications, as it results in greater vibration damping as a glass plate structure. Specifically, the loss coefficient of the plate material at 25°C is 1 × 10⁻⁶. -4 The above is preferable, 3 × 10 -4 The above is more preferable, 5 × 10 -4 The above is even more preferable. There is no particular upper limit to the loss factor, but from the perspective of productivity and manufacturing cost, 5 × 10 -3 The following is preferable. Furthermore, it is more preferable that both the first plate material 11 and the second plate material 13 have the loss coefficient described above.

[0044] For at least one of the first plate material 11 and the second plate material 13, a higher longitudinal wave sound velocity value in the thickness direction is preferable for diaphragm applications because it improves the reproduction of high-frequency sounds. Specifically, the longitudinal wave sound velocity value of the plate material is 5.5 × 10⁻⁶. 3 m / s or higher is preferred, 5.7 × 10 3 m / s or higher is more preferable, 6.0 × 10 3 m / s or higher is even more preferable. There is no particular upper limit, but from the perspective of plate material productivity and raw material costs, 7.0 × 10 3 m / s or less is preferable. Furthermore, it is more preferable that both the first plate material 11 and the second plate material satisfy the above sound velocity value.

[0045] In the glass plate structure 100 with the above configuration, at least one of the first plate material 11 and the second plate material 13 is made of glass. Here, glass plate refers to inorganic glass and organic glass. Examples of organic glass include PMMA resin, PC resin, PS resin, PET resin, and cellulose resin, which are commonly known as transparent resins.

[0046] The material of the other sheet material is arbitrary, and various materials can be used, such as resin sheets made of resins other than organic glass, metal sheets such as aluminum, and ceramic sheets made of ceramics. From the viewpoint of design, processability, and weight, it is preferable to use organic glass, resin materials, composite materials, fiber materials, and metal materials, while from the viewpoint of vibration characteristics, it is preferable to use inorganic glass, highly rigid composite materials or fiber materials, metal materials, and ceramic materials.

[0047] As the resin material, it is preferable to use a resin material that can be molded into a flat plate or a curved plate shape. As the composite material or fiber material, it is preferable to use a resin material compounded with a high-hardness filler, carbon fiber, Kevlar fiber, etc. As the metal material, aluminum, magnesium, copper, silver, gold, iron, titanium, stainless steel (SUS), etc. are preferred, and other alloy materials may be used as needed. As the ceramic material, ceramics and single crystal materials such as, for example, Al2O3, SiC, Si3N4, AlN, mullite, zirconia, yttria, YAG, etc. are more preferable. Further, for the ceramic material, a material having translucency is particularly preferable.

[0048] In the glass plate constituting at least one plate material, when using inorganic glass, its composition is not particularly limited, but in terms of mass% based on oxide, for example, the following ranges are preferable. SiO2: 40 to 80 mass%, Al2O3: 0 to 35 mass%, B2O3: 0 to 15 mass%, MgO: 0 to 20 mass%, CaO: 0 to 20 mass%, SrO: 0 to 20 mass%, BaO: 0 to 20 mass%, Li2O: 0 to 20 mass%, Na2O: 0 to 25 mass%, K2O: 0 to 20 mass%, TiO2: 0 to 10 mass%, and ZrO2: 0 to 10 mass%. However, the above composition occupies 95 mass% or more of the whole glass.

[0049] The composition of the inorganic glass plate is more preferably in the following range. SiO2: 55 to 75 mass%, Al2O3: 0 to 25 mass%, B2O3: 0 to 12 mass%, MgO: 0 to 20 mass%, CaO: 0 to 20 mass%, SrO: 0 to 20 mass%, BaO: 0 to 20 mass%, Li2O: 0 to 20 mass%, Na2O: 0 to 25 mass%, K2O: 0 to 15 mass%, TiO2: 0 to 5 mass%, and ZrO2: 0 to 5 mass%. However, the above composition occupies 95 mass% or more of the whole glass.

[0050] The smaller the specific gravity of the first plate material 11 and the second plate material 13 is, the less energy is required to vibrate the plate material. Specifically, the specific gravity of the first plate material 11 and the second plate material 13 is preferably 2.8 or less, more preferably 2.6 or less, and even more preferably 2.5 or less. The lower limit is not particularly limited, but preferably 2.2 or more.

[0051] The specific elastic modulus, which is the value obtained by dividing the Young's modulus of the first plate material 11 and the second plate material 13 by the density, can increase the rigidity of the plate material the larger it is. Specifically, the specific elastic modulus of the first plate material 11 and the second plate material 13 is respectively 2.5×10 7 m2 / s 2 The above is preferable, 2.8 × 10 7 m 2 / s 2 The above is more preferable, 3.0 × 10 7 m 2 / s 2 The above is even more preferable. The upper limit is not particularly limited, but 4.0 × 10 7 m 2 / s 2 The following are preferable.

[0052] The curved shapes of the first plate material 11 and the second plate material 13 may be a single curved surface, or they may have multiple curved surfaces with multiple radii of curvature. In other words, the glass plate structure 100 may have a double-curved shape that is curved in both the intersecting first and second directions in a plan view, or it may have a single-curved shape that is curved in only the first direction or only the second direction. Furthermore, either the first plate material 11 or the second plate material 13 may have a double-curved shape and the other may have a single-curved shape, provided that the radius of curvature of the concave main surface of the first plate material 11 is smaller than the radius of curvature of the convex main surface of the second plate material 13. Note that the first direction and the second direction may be mutually orthogonal directions in a plan view of the glass plate structure 100.

[0053] (Intermediate layer liquid and sealant) In the glass plate structure 100 of this configuration, the intermediate layer liquid 21 and sealant 23 are applied to at least a portion of the main surface (concave main surface 11b) of one of the pair of plate materials (for example, the first plate material 11). The intermediate layer liquid (hereinafter also simply referred to as the liquid) 21 is a material that constitutes the intermediate layer 15 of the glass plate structure 100. From the viewpoint of achieving a high loss coefficient for the glass plate structure 100, the viscosity coefficient of the liquid agent 21 at 25°C is 1 × 10⁻⁶. 3 A viscosity of Pa·s or less is preferable. Furthermore, the viscosity coefficient at 25°C is 1 × 10⁻⁶. -4 A viscosity of Pa·s or higher is preferable. If the viscosity is too low, vibration transmission becomes difficult, and if it is too high, the pair of plate materials located on both sides of the intermediate layer 15 will stick together and exhibit vibration behavior as a single plate material, making it difficult to dampen resonant vibrations. The viscosity coefficient is 1 × 10⁻⁶.-3 Pa·s or higher is more preferable, 1 × 10 -2 Pa·s or higher is even more preferable. Also, 1 × 10 2 A viscosity coefficient of Pa·s or less is more preferable, and 1 × 10⁻⁶ Pa·s or less is even more preferable. This viscosity coefficient can be measured using a rotational viscometer or the like.

[0054] Furthermore, from the viewpoint of achieving a high loss coefficient for the glass plate structure 100, the surface tension of the liquid agent 21 at 25°C is preferably 15 N / m to 80 mN / m. If the surface tension is too low, the adhesion between the plate materials decreases, making it difficult to transmit vibrations. If the surface tension is too high, the pair of plate materials located on both sides of the intermediate layer (liquid layer) tend to stick together, exhibiting vibration behavior as a single plate material, making it difficult to dampen resonant vibrations. A surface tension of 20 mN / m or higher is more preferable, and 30 mN / m or higher is even more preferable. This surface tension can be measured by the ring method or the like.

[0055] If the intermediate layer 15 is a liquid layer, there is a risk that if the vapor pressure is too high, the intermediate layer (liquid layer) 15 will evaporate and cease to function as a glass plate component 100. Therefore, the intermediate layer liquid 21 has a vapor pressure of 1 × 10⁻¹⁶ at 25°C and 1 atm. 4 Preferably Pa or less, 5 × 10 3 Pa or less is more preferable, 1 × 10 3 Pa or lower is even more preferable.

[0056] The intermediate layer (liquid layer) 15 is preferably chemically stable and does not react with the first plate material 11 and the second plate material 13. Chemical stability means, for example, that it does not deteriorate (degrade) much when exposed to light, or that it does not solidify, vaporize, decompose, discolor, or react with glass at least in the temperature range of -20°C to 70°C.

[0057] Examples of the intermediate layer liquid 21 include water, oil, organic solvents, liquid polymers, ionic liquids, and mixtures thereof. More specifically, examples include propylene glycol, dipropylene glycol, tripropylene glycol, straight silicone oil (dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil), modified silicone oil, acrylic acid polymer, liquid polybutadiene, glycerin paste, fluorinated solvent, fluorinated resin, acetone, ethanol, xylene, toluene, water, mineral oil, and mixtures thereof. In particular, it is preferable to include at least one selected from the group consisting of propylene glycol, dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil, and modified silicone oil, and it is more preferable to have propylene glycol or silicone oil as the main component. Furthermore, using silicone oil as the main component is preferable because the intermediate layer (liquid layer) 15 readily dissolves air, thereby suppressing the formation of bubbles.

[0058] From the viewpoint of imparting aesthetic appeal and functionality, such as coloring or fluorescence, to the glass plate structure 100, the intermediate layer liquid agent 21 may be a slurry in which powder is dispersed, or it may contain a fluorescent material. The powder content in the intermediate layer liquid 21 is preferably 0% to 10% by volume, and more preferably 0% to 5% by volume. The particle size of the powder is preferably 10 nm to 1 μm, and more preferably 10 nm to 0.5 μm or less, from the viewpoint of preventing sedimentation.

[0059] The sealant 23 is applied to prevent leakage of the liquid and to prevent delamination at the interface between the glass plate and the liquid layer of the glass plate structure.

[0060] The sealant 23 must not run off when applied to the sheet metal, and it must have sufficient strength to withstand the weight of the sheets when they are bonded together. From this viewpoint, a viscosity coefficient of 1 × 10⁻⁶ at 25°C is preferred. -1 The viscosity coefficient is Pa·s or higher, and more preferably 1 Pa·s or higher. Furthermore, from the viewpoint of good handling properties during application, a certain degree of leveling properties, and the ability to apply with a narrow seal width, the viscosity coefficient at 25°C is preferably 1 × 10⁻⁶. 3Pa·s or less, fufer1×10 2 It is less than or equal to Pa·s.

[0061] Furthermore, from the viewpoint of efficiently removing air bubbles from the intermediate layer (liquid layer) 15, it is preferable that the viscosity coefficient of the sealant 23 is higher than that of the liquid agent 21. When air bubbles remaining in the intermediate layer (liquid layer) 15 are removed in the depressurization process described later, a higher viscosity coefficient of the sealant 23 than that of the liquid agent 21 makes it easier to secure a flow path for the air bubbles to move.

[0062] Examples of sealants 23 include highly elastic rubber, resin, gel, etc. For sealant resins, acrylic, cyanoacrylate, epoxy, silicone, urethane, and phenolic resins can be used. Curing methods include one-component, two-component, heat curing, ultraviolet curing, and visible light curing. Thermoplastic resins (hot melt bonds) can also be used as the sealant 23. Examples include ethylene vinyl acetate-based, polyolefin-based, polyamide-based, synthetic rubber-based, acrylic-based, and polyurethane-based sealants. Regarding rubber, for example, natural rubber, synthetic natural rubber, butadiene rubber, styrene-butadiene rubber, butyl rubber, nitrile rubber, ethylene-propylene rubber, chloroprene rubber, acrylic rubber, chlorosulfonated polyethylene rubber (Hypalon), urethane rubber, silicone rubber, fluororubber, ethylene-vinyl acetate rubber, epichlorohydrin rubber, polysulfide rubber (Thiokol), and hydrogenated nitrile rubber can be used.

[0063] The order in which the liquid agent 21 and the sealant 23 are applied does not matter. Alternatively, the liquid agent 21 may be applied first to the area on the concave main surface 11b of the first plate material 11 where an intermediate layer is to be formed, and then the sealant 23 may be applied around its outer circumference. Alternatively, the sealant 23 may be applied first to the concave main surface 11b of the first plate material 11, and then the liquid agent 21 may be applied to its inner circumference.

[0064] The application pattern of the liquid agent 21 is not particularly limited; it may be applied in layers, or in a dot pattern, grid pattern, or stripe pattern. Among these, a dot pattern is preferred from the viewpoint of easily ensuring a channel for air bubbles to escape.

[0065] Furthermore, the coating thickness of the liquid agent 21 can be appropriately set so that the thickness of the intermediate layer 15 is within the desired range, and is preferably 5 μm to 500 μm.

[0066] The sealant 23 is preferably applied so as to surround the outer circumference of the liquid 21. In this case, the area of ​​the sealant application is preferably 20% or less of the area of ​​the liquid application, more preferably 10% or less, and particularly preferably 5% or less, so as not to interfere with vibration.

[0067] The coating thickness of the sealant 23 is preferably greater than the coating thickness of the liquid agent 21, and is preferably 10 μm to 1000 μm, from the viewpoint of easily securing a flow path for air bubbles to escape.

[0068] Known methods such as screen printing and dispensers can be used to apply the liquid agent 21 and the sealant 23.

[0069] (A laminate made by bonding sheets of wood together) A laminate is obtained by bonding the second plate material 13 to the concave main surface 11b of the first plate material 11, where the intermediate layer liquid 21 and sealant 23 have been applied. It is preferable to perform the lamination under normal pressure. In the vacuum lamination method, it is difficult to hold the two sheet materials in a positional accuracy under reduced pressure, making it difficult to laminate them without misalignment. However, by laminating under normal pressure, the two sheet materials can be laminated with good positional accuracy. Furthermore, since the laminate is prone to deformation of the plate material and the sealant 23 softens with heat, making it difficult to secure a channel for air bubbles to escape and thus difficult to degas, it is preferable not to heat the laminate during the process of obtaining the laminate by bonding.

[0070] (Degassing of laminated materials under reduced pressure) The laminate obtained as described above is subjected to reduced pressure. As a result, even if air bubbles are present in the intermediate layer (liquid layer) 15 when the liquid agent 21 is applied or when the plates are bonded together, the air bubbles gradually move to the outer edge of the plates and are released outside the laminate. Specifically, the laminate is subjected to an atmosphere preferably of 100 Pa or less, more preferably of 50 Pa or less. The duration of exposure depends on the degassing rate, but is preferably 1 to 180 minutes. Furthermore, from the viewpoint of efficiently releasing bubbles by rapidly reducing the pressure, the pressure reduction is preferably carried out within 30 minutes, more preferably within 15 minutes, and particularly preferably within 10 minutes, until the pressure reaches 100 Pa or less. Methods for subjecting the laminate to reduced pressure include using a vacuum chamber or placing the laminate in a bag made of rubber or the like and degassing the inside of the bag. In this case, from the viewpoint of being able to rapidly reduce pressure, the ratio of the space volume inside the decompression chamber (L) to the exhaust capacity inside the decompression chamber (L / min) is preferably 1.8 or less, more preferably 1.5 or less, and even more preferably 0.9 or less.

[0071] (Pressurization of the laminate) It is preferable to pressurize the laminate after it has been subjected to reduced pressure. This allows any air that could not be removed by depressurization alone to be pushed out from the intermediate layer (liquid layer) 15. Possible pressurization methods include pre-pressuring the laminate using a roll and then pressing it using an autoclave. The pressure inside the autoclave is preferably 0.1 MPa to 10 MPa, and the pressing time is preferably 1 minute to 30 minutes.

[0072] (Sealant curing) The sealant 23 may be cured as needed. This ensures that leakage of the intermediate layer (liquid layer) 15 is reliably prevented. The curing method can be appropriately selected depending on the material of the sealant 23. If the sealant 23 is a photocurable resin, it may be cured by irradiation with light such as ultraviolet light, and if it is a thermosetting resin, it may be cured by heating.

[0073] (middle layer hardening) The intermediate layer (liquid layer) 15 obtained by the intermediate layer liquid agent 21 may be cured as needed, and curing after degassing is particularly preferable because it eliminates air bubbles in the solid-phase intermediate layer 15. The curing method for the intermediate layer 15 can be appropriately selected depending on the material of the sealant 23. The intermediate layer liquid may also be made of the same material as the sealant. If the sealant 23 is a photocurable resin, it may be cured by light irradiation such as ultraviolet light; if it is a thermosetting resin, it may be cured by heating. The sealant 23 may also be a moisture-induced condensation type resin.

[0074] <Glass plate structure> The thinner the intermediate layer 15, the more preferable it is in terms of maintaining high rigidity and vibration transmission. From this viewpoint, when the total thickness of the pair of plate materials is 1 mm or less, the thickness of the intermediate layer 15 is preferably 1 / 10 or less, more preferably 1 / 20 or less, even more preferably 1 / 30 or less, even more preferably 1 / 50 or less, especially preferably 1 / 70 or less, and particularly preferably 1 / 100 or less of the total thickness of the pair of plate materials.

[0075] Furthermore, if the total thickness of the pair of plate materials exceeds 1 mm, the thickness of the intermediate layer 15 is preferably 100 μm or less, more preferably 50 μm or less, even more preferably 30 μm or less, even more preferably 20 μm or less, especially preferably 15 μm or less, and particularly preferably 10 μm or less. The lower limit of the thickness of the intermediate layer 15 is preferably 0.01 μm or more from the viewpoint of film-forming properties and durability.

[0076] Furthermore, at the outer edge of the glass plate structure, it is preferable to make the thickness of the sealant in the area extending 1 / 3 of the way from the outer edge towards the center of the glass plate structure in the longitudinal direction of the glass plate structure 0.5 mm or less. By forming a strip-shaped seal portion with a sealant thickness of 0.5 mm or less in this way, the inflow of air into the intermediate layer (liquid layer) can be reliably prevented.

[0077] Thus, the present invention is not limited to the embodiments described above. It is also intended and within the scope of protection to be provided for the combination of each configuration of the embodiments, as well as for modifications and applications by those skilled in the art based on the description in the specification and well-known technology.

[0078] The glass plate structure described above is formed by bonding a pair of plate materials with an intermediate layer in between, but the number of plate materials is arbitrary, and at least one plate material may be bonded either with or directly to the intermediate layer.

[0079] Furthermore, when glass plate structures are installed in vehicles, possible application locations include, for example, the front side windows, rear side windows, front windshield, rear window, and roof glazing of automobiles. In addition to automobiles, it can also be applied to railway vehicles and other vehicles, and is suitably applied to diaphragms used in speakers, microphones, earphones, and mobile devices, as well as aircraft windows, ship windows, windows in buildings such as houses (building opening materials), and glass substrates for magnetic recording media.

[0080] As described above, the following matters are disclosed in this specification: (1) A glass plate structure comprising a first plate material and a second plate material arranged to overlap each other in the thickness direction, and an intermediate layer provided between the first plate material and the second plate material, wherein at least one of the first plate material and the second plate material is a glass plate, Each of the first and second plates is a plate having a curved portion with a convex main surface protruding in the thickness direction and a concave main surface opposite to the convex main surface. The concave main surface of the first plate material and the convex main surface of the second plate material are superimposed on each other, A glass plate structure in which the radius of curvature of the concave main surface of the first plate material is smaller than the radius of curvature of the convex main surface of the second plate material. With this glass plate structure, the concave main surface of the first plate material, which has a small radius of curvature, and the convex main surface of the second plate material, which has a large radius of curvature, overlap, allowing the first and second plates to be joined with high precision, and also reducing the gap at the outer edge. Therefore, the intermediate layer can be stably sandwiched between the first and second plates.

[0081] (2) The glass plate structure according to (1), wherein the distance between the first plate and the second plate in the thickness direction is such that the distance between the first plate and the second plate increases from the outer edge toward the center. With this glass plate structure, the gap between the first and second plate materials in the thickness direction is minimized at the outer edge, making it easier to seal the intermediate layer.

[0082] (3) The glass plate structure according to (1) or (2), wherein the intermediate layer is a solid phase. According to this glass plate structure, the intermediate layer placed between the first plate material and the second plate material is stably sandwiched in place.

[0083] (4) The glass plate structure according to (1) or (2), wherein the intermediate layer includes a liquid layer. This glass plate configuration makes it easier to achieve good acoustic properties.

[0084] (5) The glass plate structure according to (4), wherein a solid layer is provided between the first plate material and the liquid layer, and between the second plate material and the liquid layer. This glass plate structure makes it less likely for the glass plate to shatter and scatter when it breaks.

[0085] (6) The glass plate structure according to (5), wherein the solid layer is thinner than the thickness of the glass plate. This glass plate structure makes it easier to maintain transparency in the visible light region.

[0086] (7) The glass plate structure according to (5) or (6), wherein the solid layer comprises a resin material. This glass plate structure makes it less likely for the glass plate to shatter and scatter when it breaks.

[0087] (8) The outer edges of the first plate and the second plate are provided with sealing portions that join the first plate and the second plate together. The glass plate structure according to any one of (4) to (7), wherein the liquid layer is sealed in the inner space surrounded by the sealing portion. This glass plate structure prevents air from entering the liquid layer by sealing the liquid layer with a sealing portion.

[0088] (9) The glass plate structure according to (8), wherein the viscosity coefficient of the sealant provided in the sealing portion is higher than the viscosity coefficient of the liquid layer. This glass plate structure allows for the efficient removal of air bubbles from the liquid layer.

[0089] (10) The viscosity coefficient of the seal portion is 1 × 10 -1 The viscosity is greater than or equal to Pa·s, and the viscosity coefficient of the liquid layer is 1 × 10⁻⁶. 3 A glass plate structure as described in (8) or (9), wherein the value is less than or equal to s. This glass plate structure provides sufficient strength to withstand the weight of the plates when they are bonded together.

[0090] (11) The glass plate structure according to any one of (4) to (10), wherein the liquid layer is a liquid agent containing silicone. According to this glass plate structure, the inclusion of silicone makes it easier for the liquid layer to dissolve air, thereby suppressing the formation of bubbles.

[0091] (12) The glass plate structure according to any one of (1) to (11), wherein the first plate material and the second plate material have the same shape as each other in a plan view. With this glass plate structure, the outer edges of the first and second plates overlap, reducing the gap between the plates.

[0092] (13) The glass plate structure according to any one of (1) to (12), wherein the gap between the first plate material and the second plate material at the outer edges of the plates material is 0.5 mm or less around the entire circumference. This glass plate structure effectively prevents air from entering the intermediate layer.

[0093] (14) The glass plate structure according to any one of (1) to (13), wherein the first plate material and the second plate material are both glass plates. This glass plate structure allows for improved vibration characteristics.

[0094] (15) The loss coefficients of the first and second plate materials at 25°C are 1 × 10 -4 The above 5 x 10 -3 A glass plate structure as described in any of (1) to (14) below. This glass plate structure dampens resonant vibrations, resulting in good vibration transmission characteristics.

[0095] (16) A method for manufacturing a glass plate structure comprising a first plate material and a second plate material arranged to overlap each other in the thickness direction, and an intermediate layer provided between the first plate material and the second plate material, wherein at least one of the first plate material and the second plate material is a glass plate, Each of the first and second plates has a curved surface having a convex main surface protruding in the thickness direction and a concave main surface opposite to the convex main surface, and the radius of curvature of the concave main surface of the first plate is smaller than the radius of curvature of the convex main surface of the second plate. The intermediate layer liquid and sealant are provided on at least a portion of the concave main surface of the first plate material, A laminate is obtained by bonding the convex main surface of the second plate material to the concave main surface on which the intermediate layer liquid and sealant are provided, The laminate is subjected to reduced pressure, A method for manufacturing a glass plate structure, including the following: According to this method for manufacturing a glass plate structure, the concave main surface of the first plate material, which has a small radius of curvature, and the convex main surface of the second plate material, which has a large radius of curvature, are bonded together via an intermediate layer liquid and a sealant. This allows the first and second plates to be combined with high precision, and also reduces the gap at the outer edge. Therefore, the intermediate layer can be stably sandwiched between the first and second plates.

[0096] (17) A method for manufacturing a glass plate structure according to (16), wherein a solid layer is provided between the first plate material and the intermediate layer liquid, and between the second plate material and the intermediate layer liquid. According to this method for manufacturing glass plate structures, when a glass plate breaks, the resulting glass plate structure is less likely to shatter.

[0097] (18) The method for manufacturing a glass plate structure according to (16) or (17), wherein the laminate is subjected to reduced pressure and then pressurized. This method for manufacturing the glass plate structure reliably prevents air from entering the intermediate layer.

[0098] (19) A method for manufacturing a glass plate structure according to any one of (16) to (18), wherein the sealant is cured after it has been applied. According to this method for manufacturing a glass plate structure, when the intermediate layer includes a liquid layer, leakage of liquid can be reliably prevented.

[0099] (20) A method for manufacturing a glass plate structure according to any one of (16) to (19), wherein the intermediate layer liquid is cured after the sealant has been applied. According to this method for manufacturing the glass plate structure, the intermediate layer placed between the first plate material and the second plate material is stably sandwiched in place.

[0100] This application is based on the Japanese Patent Application No. 2021-085411 filed on May 20, 2021, and its contents are incorporated herein by reference. [Explanation of symbols]

[0101] 11 First plate material 11a Convex main surface 11b Concave main surface 13 Second plate material 13a Convex main surface 13b Concave main surface 15. Intermediate layer (liquid layer) 17 Outer edge 19. Seal part 21 Intermediate layer liquid 23. Sealant 31 1st solid layer 33 Second solid layer 100,101 Glass plate structure

Claims

1. A glass plate structure comprising a first plate material and a second plate material arranged to overlap each other in the thickness direction, and an intermediate layer provided between the first plate material and the second plate material, wherein at least one of the first plate material and the second plate material is a glass plate, Each of the first and second plates is a plate having a curved portion with a convex main surface protruding in the thickness direction and a concave main surface on the opposite side of the convex main surface. The concave main surface of the first plate material and the convex main surface of the second plate material are superimposed on each other, The radius of curvature of the concave main surface of the first plate material is smaller than the radius of curvature of the convex main surface of the second plate material. The aforementioned intermediate layer is a glass plate structure including a liquid layer.

2. The glass plate structure according to claim 1, wherein the distance between the first plate and the second plate in the thickness direction widens from the outer edges of the first plate and the second plate toward the center.

3. The glass plate structure according to claim 1, wherein a solid layer is provided between the first plate material and the liquid layer, and between the second plate material and the liquid layer, at least one of these locations.

4. The glass plate structure according to claim 3, wherein the solid layer is thinner than the thickness of the glass plate.

5. The glass plate structure according to claim 3, wherein the solid layer comprises a resin material.

6. The outer edges of the first and second plates are provided with sealing portions that join the first and second plates together. The liquid layer is sealed within the inner space surrounded by the sealing portion. The glass plate structure according to claim 1.

7. The glass plate structure according to claim 6, wherein the viscosity coefficient of the sealant provided in the sealing portion at 25°C is higher than the viscosity coefficient of the liquid layer at 25°C.

8. The viscosity coefficient of the seal portion at 25°C is 1 × 10 －１ The viscosity is Pa·s or higher, and the viscosity coefficient of the liquid layer at 25°C is 1 × 10⁻⁶. ３ The glass plate structure according to claim 6, wherein the Pa·s is less than or equal to Pa·s.

9. The aforementioned liquid layer is a liquid containing silicone. The glass plate structure according to claim 1.

10. The first plate material and the second plate material have the same shape as each other in a plan view. The glass plate structure according to claim 1.

11. The glass plate structure according to claim 1, wherein the gap between the first plate material and the second plate material at their outer edges is 0.5 mm or less around the entire circumference.

12. The first plate material and the second plate material are both glass plates. The glass plate structure according to claim 1.

13. A glass plate component used in a vehicle, The glass plate structure according to claim 1.

14. The loss coefficients of the first and second plate materials at 25°C are 1 × 10⁻⁶ －４ The above 5 x 10 －３ The glass plate structure according to any one of claims 1 to 13, which is as follows:

15. A method for manufacturing a glass plate structure comprising a first plate material and a second plate material arranged to overlap each other in the thickness direction, and an intermediate layer provided between the first plate material and the second plate material, wherein at least one of the first plate material and the second plate material is a glass plate, Each of the first and second plates has a curved surface having a convex main surface protruding in the thickness direction and a concave main surface opposite to the convex main surface, and the radius of curvature of the concave main surface of the first plate is smaller than the radius of curvature of the convex main surface of the second plate. The intermediate layer liquid and sealant are provided on at least a portion of the concave main surface of the first plate material, A laminate is obtained by bonding the convex main surface of the second plate material to the concave main surface on which the intermediate layer liquid and sealant are provided, The laminate is subjected to reduced pressure, A method for manufacturing a glass plate structure, including the following:

16. A method for manufacturing a glass plate structure according to claim 15, wherein a solid layer is provided between the first plate material and the intermediate layer liquid, and between the second plate material and the intermediate layer liquid.

17. The method for manufacturing a glass plate structure according to claim 15, wherein the laminate is subjected to reduced pressure and then pressurized.

18. A method for manufacturing a glass plate structure according to claim 15, wherein the sealant is cured after the sealant has been applied.

19. A method for manufacturing a glass plate structure according to claim 15, wherein the intermediate layer liquid is cured after the sealant is provided.

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