Window glass and method for manufacturing window glass

Abstract

To provide a window glass capable of suppressing the infiltration of moisture into a laminated glass from an end face of the laminated glass.SOLUTION: A window glass 1 according to an aspect of the present disclosure includes a laminated glass 10 including a first glass plate 11, a second glass plate 12 disposed to face the first glass plate 11, and an intermediate film 13 disposed between the first glass plate 11 and the second glass plate 12, a frame body 20 provided around an end portion side of the laminated glass 10, and a butyl-based sealing material 41 provided between the laminated glass 10 and the frame body 20. The frame body 20 has a substantially U-shaped cross-sectional shape, and is provided such that the end portion of the laminated glass 10 is fitted into the opening portion 22 of the frame body 20. The sealing material 41 is provided so as to be crushed between the end surface 15 of the laminated glass 10 and the bottom surface 21 of the frame body 20.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates to glazing and methods for manufacturing glazing. [Background technology]

[0002] In recent years, laminated glass has been widely used in various fields such as construction. Furthermore, in recent years, development of solar cell modules in which photovoltaic power generation cells are enclosed inside laminated glass has been progressing.

[0003] Patent Document 1 discloses a technology related to laminated glass. The laminated glass disclosed in Patent Document 1 has strip-shaped edge protection members provided on the side edge surfaces of the first glass sheet and the second glass sheet. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2014 / 098160 Summary of the Invention [Problem to be solved by the invention]

[0005] Laminated glass is made up of two glass sheets arranged facing each other and an interlayer film between the two glass sheets, and is widely used in various fields, including construction.

[0006] However, because laminated glass has an interlayer film between two glass sheets, in a high-humidity environment, moisture in the air can penetrate into the laminated glass from the edge of the glass, causing degradation of the interlayer film. In particular, when photovoltaic cells are enclosed inside the laminated glass, the infiltrating moisture can cause degradation of the photovoltaic cells.

[0007] In view of the above problems, an object of the present disclosure is to provide a window glass that can prevent moisture from penetrating into the interior of the laminated glass from the edge face of the laminated glass, and a method for manufacturing the window glass. [Means for solving the problem]

[0008] The window glass according to one aspect of the present disclosure and the method for manufacturing the window glass are as follows.

[0009] [1] a laminated glass including a first glass plate, a second glass plate disposed so as to face the first glass plate, and an interlayer film disposed between the first glass plate and the second glass plate; a frame provided around an end portion of the laminated glass; a butyl-based sealant provided between the laminated glass and the frame, the frame has a substantially U-shaped cross section, and an opening of the frame is provided so that an edge of the laminated glass fits into the opening, The sealing material is provided so as to be crushed between the end surface of the laminated glass and the bottom surface of the frame. Window glass.

[0010] [2] The window glass according to [1], wherein the sealing material is provided at an end surface of the laminated glass so as to cover the interlayer film provided between the first glass sheet and the second glass sheet.

[0011] [3] The window glass according to [1] or [2], wherein the sealing material is made of an elastically deformable material.

[0012] [4] The window glass according to any one of [1] to [3], wherein the sealing material is thermocompression bonded between the end face of the laminated glass and the bottom face of the frame.

[0013] [5] The window glass according to any one of [1] to [4], wherein the storage modulus of the sealing material at 25° C. is 15 MPa or more and 60 MPa or less.

[0014] [6] The window glass according to any one of [1] to [5], wherein the frame is a sash or a glazing channel.

[0015] [7] The window glass according to any one of [1] to [6], wherein a photovoltaic cell is enclosed between the first glass plate and the second glass plate of the laminated glass.

[0016] [8] The window glass according to [7], wherein the photovoltaic cell is a perovskite photovoltaic cell.

[0017] [9] preparing a laminated glass having a first glass plate, a second glass plate disposed so as to face the first glass plate, and an interlayer film disposed between the first glass plate and the second glass plate; preparing a frame having a substantially U-shaped cross section; providing a butyl-based sealant on at least one of the end surface of the laminated glass and the bottom surface of the frame; and fitting the edge of the laminated glass into the opening of the frame body to attach the frame body to the periphery of the edge of the laminated glass, The sealing material is provided so as to be crushed between the end surface of the laminated glass and the bottom surface of the frame. Window glass manufacturing method.

[0018]

[10] In the step of providing the sealing material, a molten sealing material is applied to at least one of the end surface of the laminated glass and the bottom surface of the frame, In the step of attaching the frame to the laminated glass, an edge of the laminated glass is fitted into an opening of the frame, and the molten sealing material is compressed between the edge of the laminated glass and a bottom surface of the frame. [9] A method for manufacturing a window glass according to [9].

[0019]

[11] The method for manufacturing a window glass according to [9] or

[10] , wherein the storage modulus of the sealing material at 25°C is 15 MPa or more and 60 MPa or less. [Effects of the Invention]

[0020] The present disclosure makes it possible to provide a window glass that can prevent moisture from penetrating into the interior of the laminated glass from the edge face of the laminated glass, and a method for manufacturing the window glass. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a front view showing an example of the configuration of a window glass according to an embodiment. [Figure 2] 1 is a cross-sectional view showing an example of the configuration of a window glass according to an embodiment. [Figure 3] FIG. 4 is a cross-sectional view showing another example of the configuration of a window glass according to an embodiment. [Figure 4A] 1 is a cross-sectional view illustrating a method for manufacturing a window glass according to an embodiment. [Figure 4B] 1 is a cross-sectional view illustrating a method for manufacturing a window glass according to an embodiment. [Figure 4C] 1 is a cross-sectional view illustrating a method for manufacturing a window glass according to an embodiment. [Figure 4D] 1 is a cross-sectional view illustrating a method for manufacturing a window glass according to an embodiment. [Figure 5] FIG. 10 is a front view for explaining the measurement position of the sample according to the embodiment. [Figure 6] 1 is a graph showing the change in β-OH at each measurement position of a sample without heating. [Figure 7]1 is a graph showing the change in β-OH at each measurement position of a heated sample. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, an embodiment will be described with reference to the drawings. Fig. 1 is a front view showing an example of the configuration of a windowpane according to an embodiment, and Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1 showing the example of the configuration of a windowpane according to an embodiment.

[0023] 1 and 2, the window glass 1 according to this embodiment comprises laminated glass 10, a frame 20 provided around the edge of the laminated glass, and a sealing material 41 (see FIG. 2) provided between the laminated glass 10 and the frame 20. The window glass 1 according to this embodiment can be suitably used as a building material such as window glass for buildings.

[0024] As shown in Fig. 2, laminated glass 10 includes a first glass plate 11, a second glass plate 12, and an interlayer film 13 disposed between the first glass plate 11 and the second glass plate 12. Laminated glass 10 is configured by stacking first glass plate 11, interlayer film 13, and second glass plate 12 in the thickness direction, and first glass plate 11 and second glass plate 12 are bonded to each other using interlayer film 13.

[0025] The thickness of each of the first glass plate 11 and the second glass plate 12 is, for example, 1 mm or more and 19 mm or less. For example, chemically strengthened glass may be used as the first glass plate 11 and the second glass plate 12. When chemically strengthened glass is used, the first glass plate 11 and the second glass plate 12 can be made lighter while maintaining their strength. In the present embodiment, air-cooled tempered glass may be used as the first glass plate 11 and the second glass plate 12.

[0026] Interlayer film 13 is disposed so as to be sandwiched between first glass plate 11 and second glass plate 12. The thickness of interlayer film 13 is, for example, 0.38 mm or more and 2.28 mm or less. Interlayer film 13 may be made of EVA (ethylene-vinyl acetate copolymer) resin, PVB (polyvinyl butyral) resin, ionomer resin, COP (cycloolefin polymer), polyurethane, PVC (polyvinyl chloride), POE (polyolefin elastomer), TPO (olefin-based thermoplastic elastomer), or the like. Interlayer film 13 may also be made of a combination of these materials.

[0027] In this embodiment, a photovoltaic cell 18 may be enclosed between the first glass plate 11 and the second glass plate 12 of the laminated glass 10. The photovoltaic cell 18 may be formed using a photovoltaic cell of a silicon-based single crystal type, a silicon-based polycrystalline type, an amorphous silicon type, a thin-film silicon type, a CIGS type, an organic thin-film type, a dye-sensitized type, a perovskite type, or the like. The photovoltaic cell 18 may be formed using a plurality of photovoltaic cells. Furthermore, for example, a monofacial photovoltaic cell may be used as the photovoltaic cell 18. In this case, the photovoltaic cell 18 is disposed so that its light-receiving surface faces outward. For example, when the first glass plate 11 is disposed outdoors and the second glass plate 12 is disposed indoors, the photovoltaic cell 18 is disposed so that its light-receiving surface faces the first glass plate 11. Furthermore, a bifacial photovoltaic cell may be used as the photovoltaic cell 18.

[0028] For example, when forming laminated glass 10, a first glass plate 11, an interlayer film 13, a photovoltaic cell 18, another interlayer film 13, and a second glass plate 12 are laminated in this order, and this laminate is heated and pressurized to bond them together, thereby forming laminated glass 10. At this time, the interlayer films 13 arranged on both sides of the photovoltaic cell 18 are heated and melted, so that the completed laminated glass 10 consists of a single layer of interlayer film 13, and the photovoltaic cell 18 is enclosed inside the interlayer film 13.

[0029] Note that if the photovoltaic cells 18 are perovskite-type photovoltaic cells or thin-film silicon-type photovoltaic cells, that is, if the photovoltaic cells 18 are formed as thin films, the photovoltaic cells 18 may be formed directly on the surface of at least one of the first glass plate 11 and the second glass plate 12. Furthermore, in the configuration example shown in FIG. 1 , the photovoltaic cells 18 are provided on almost the entire surface of the laminated glass 10, but the positions and areas at which the photovoltaic cells 18 are provided can be determined arbitrarily. The window glass 1 according to this embodiment has the effect of preventing moisture from penetrating into the laminated glass 10. Therefore, when perovskite-type photovoltaic cells 18, which are particularly susceptible to the effects of moisture, are used, deterioration of the photovoltaic cells 18 can be effectively prevented. Furthermore, in this embodiment, the photovoltaic cells 18 may be omitted.

[0030] As shown in Fig. 1, a frame 20 is provided around the edge of the laminated glass. As shown in Fig. 2, the frame 20 has a substantially U-shaped cross section, and is provided so that the edge of the laminated glass 10 fits into an opening 22 in the frame 20. For example, the frame 20 is a sash, and in this case, the frame 20 is made of a metal material such as aluminum or stainless steel, or a hard resin material such as polyvinyl chloride.

[0031] 3, the frame 30 may be a glazing channel. In this case, the frame 30 also has a substantially U-shaped cross section, and is configured so that the edge of the laminated glass fits into the opening 22 of the frame 30. The frame 30 (glazing channel) includes a main body 31 having a substantially U-shaped cross section, and seal portions 32 and 33 provided on the top surface of both sides of the main body 31. The main body 31 is made of a hard resin material. The seal portions 32 and 33 are made of a soft resin material. The frame 30 can be manufactured, for example, by two-color molding using a hard material and a soft material.

[0032] 2 and 3, the sealant 41 is a butyl-based material and is provided between the laminated glass 10 and the frames 20 and 30. The sealant 41 is provided so as to be crushed between the end face 15 of the laminated glass 10 and the bottom faces 21 of the frames 20 and 30. For example, the sealant 41 may be made of an elastically deformable material.

[0033] Furthermore, the sealant 41 may be provided at the edge 15 of the laminated glass 10 so as to cover the interlayer 13 provided between the first glass sheet 11 and the second glass sheet 12. By configuring the interlayer 13 at the edge 15 of the laminated glass 10 to be covered by the sealant 41 in this way, it is possible to effectively prevent moisture from penetrating into the laminated glass 10 from the edge 15 of the laminated glass 10.

[0034] For example, the sealant 41 may be thermocompression-bonded between the edge 15 of the laminated glass 10 and the bottom surface 21 of the frame 20, 30. That is, when the window glass 1 is manufactured, the molten sealant 41 may be applied to at least one of the edge 15 of the laminated glass and the bottom surface 21 of the frame 20. The edge of the laminated glass 10 may then be fitted into the opening 22 of the frame 20, and the molten sealant 41 may be compressed between the edge 15 of the laminated glass 10 and the bottom surface 21 of the frame 20, thereby thermocompression-bonding the sealant 41. By thermocompression-bonding the sealant 41 in this manner, it is possible to effectively prevent moisture from penetrating into the laminated glass 10 from the edge 15 of the laminated glass 10.

[0035] In this embodiment, a butyl-based thermoplastic resin can be used for the sealing material 41. For example, a thermoplastic resin having a JIS A hardness of 10 to 90 at 25°C may be used for the sealing material 41.

[0036] In this case, the butyl-based thermoplastic resin may contain butyl-based rubber, crystalline polyolefin, a desiccant, and an inorganic filler. That is, it is preferable to use a resin material containing butyl-based rubber so as to obtain a sufficiently low moisture permeability for the sealing material 41. Furthermore, it is preferable to add a material that contributes to high hardness, such as crystalline polyolefin, so as to obtain a sufficient shape retention for the sealing material 41.

[0037] The proportion of butyl rubber to the total amount of butyl rubber and crystalline polyolefin in sealing material 41 is preferably 50 to 98 mass %. If it is 50 mass % or more, the elastic modulus at room temperature can be increased. If it is 98 mass % or less, the melt viscosity at high temperatures can be reduced.

[0038] The proportion of crystalline polyolefin relative to the total amount of butyl rubber and crystalline polyolefin in the sealing material 41 is preferably 2 to 50 mass%, more preferably 5 to 40 mass%, even more preferably 7 to 20 mass%, and most preferably 8 to 15 mass%. If the proportion of crystalline polyolefin is 2 mass% or more, the hardness of the butyl rubber can be increased. If it is 50 mass% or less, the properties of the butyl rubber are easily exhibited.

[0039] The desiccant contained in the thermoplastic resin may be zeolite, alumina, silica gel, etc., with zeolite being preferred due to its high moisture absorption performance in low humidity regions. The inorganic filler contained in the thermoplastic resin may be calcium carbonate, talc, mica, carbon black, or other commonly used inorganic fillers, which may be used alone or in combination of two or more. In this case, the proportion of the inorganic filler per 100 parts by weight of the total of the butyl rubber and the crystalline polyolefin is preferably 200 parts by mass or less.

[0040] In this embodiment, the butyl-based rubber contained in the thermoplastic resin preferably includes two types of materials: a high molecular weight material that constitutes the high molecular weight butyl-based rubber, and a low molecular weight material that constitutes the low molecular weight butyl-based rubber.

[0041] The proportion of the high molecular weight butyl rubber to the total weight of the sealing material 41 is preferably 15 to 35 mass %, and more preferably 20 to 30 mass %. If it is 15 mass % or more, the elastic modulus at room temperature can be increased. If it is 35 mass % or less, the melt viscosity at high temperatures can be reduced. Furthermore, the proportion of the low molecular weight butyl rubber to the total weight of the sealing material 41 is preferably 15 to 35 mass %, more preferably 16 to 30 mass %, and even more preferably 17 to 25 mass %. If it is 15 mass % or more, the melt viscosity at high temperatures can be reduced. If it is 35 mass % or less, the elastic modulus at room temperature can be increased.

[0042] High molecular weight butyl rubber and low molecular weight butyl rubber have almost the same chemical structure, but different molecular weights. Because they have the same chemical structure, they have the same gas permeability and chemical resistance, but because they have different molecular weights, their physical properties, such as melt viscosity and elastic modulus, differ. High molecular weight butyl rubber is a block-like solid and exhibits the properties of an elastomer. On the other hand, low molecular weight butyl rubber is a viscous liquid and exhibits the properties of an adhesive.

[0043] The sealing material 41 used in this embodiment utilizes the difference in physical properties due to the molecular weight of butyl rubber in order to increase the fluidity (reduce the melt viscosity) at high temperatures while maintaining the elastic modulus at room temperature. The details of this will be explained below.

[0044] In order to reduce the melt viscosity, the molecular weight of the high-molecular-weight butyl rubber has a large effect, so when selecting the high-molecular-weight butyl rubber, it is preferable to use a material with a lower molecular weight within the range that exhibits the physical properties of the high-molecular-weight butyl rubber (high elastomer properties and elasticity). Specifically, as the high-molecular-weight butyl rubber, it is preferable to use a material with a number average molecular weight of 55,000 to 150,000, more preferably a material with a number average molecular weight of 60,000 to 120,000, even more preferably a material with a number average molecular weight of 65,000 to 100,000, and particularly preferably a material with a number average molecular weight of 70,000 to 80,000.

[0045] If a butyl rubber with a lower molecular weight among high-molecular-weight butyl rubbers is selected as the high-molecular-weight butyl rubber, a decrease in the modulus of elasticity at room temperature may occur. Therefore, in order to reduce the melt viscosity and maintain the modulus of elasticity at room temperature, it is preferable to select a material with a higher molecular weight within the range that exhibits the physical properties (high viscosity) of low-molecular-weight butyl rubber. Specifically, as the low-molecular-weight butyl rubber, it is preferable to use a material with a number average molecular weight of 15,000 to 50,000, and more preferably a material with a number average molecular weight of 35,000 to 45,000.

[0046] By using such a material, the melt viscosity of the encapsulant 41 at 120°C can be set to 0.6 kPa·s or more and 7.0 kPa or less, and the storage modulus at 25°C can be set to 15 MPa or more and 60 MPa or less. This makes it possible to reduce the melt viscosity at high temperatures while maintaining the modulus at room temperature. In other words, if the melt viscosity of the thermoplastic resin used for the encapsulant 41 at 120°C is set within the range of 0.6 kPa·s or more and 7.0 kPa·s or less, molding is possible even at temperatures of 150°C or less.

[0047] Furthermore, the window glass 1 is actually used after the sealing material 41 has cooled and solidified to form the completed window glass 1, and is generally used at room temperature of around 25°C. Therefore, it is preferable that the sealing material 41 has an appropriate elastic modulus at room temperature. Therefore, the storage elastic modulus at 25°C of the thermoplastic resin used as the sealing material 41 is preferably 15 MPa or more and 60 MPa or less, more preferably 20 MPa or more and 45 MPa or less, and even more preferably 20 MPa or more and 30 MPa or less.

[0048] As explained above, in the window glass 1 according to this embodiment, a butyl-based sealant 41 is provided between the laminated glass 10 and the frames 20, 30. The sealant 41 is provided so as to be crushed between the edge face 15 of the laminated glass 10 and the bottom faces 21 of the frames 20, 30. Therefore, even when the window glass 1 is used in a high-humidity environment, moisture in the air can be prevented from penetrating into the laminated glass 10 through the edge face 15 of the laminated glass 10. This prevents deterioration of the interlayer film 13. Furthermore, when photovoltaic cells 18 are enclosed inside the laminated glass 10, deterioration of the photovoltaic cells 18 can be prevented.

[0049] Next, a method for manufacturing a windowpane according to this embodiment will be described below. Figures 4A to 4D are cross-sectional views illustrating the method for manufacturing a windowpane according to this embodiment.

[0050] When manufacturing the window glass 1 according to this embodiment, first, as shown in Fig. 4A, a laminated glass 10 and a frame 20 are prepared. The laminated glass described above can be used for the laminated glass 10. The frame 20 has a substantially U-shaped cross section and is provided with an opening 22 at the top.

[0051] Next, as shown in FIG. 4B , a butyl-based sealant 41 is applied to the bottom surface 21 of the frame 20. For example, the molten sealant 41 is applied to the bottom surface 21 of the frame 20 using an application means (not shown). The above-mentioned materials can be used for the sealant 41. Note that while FIG. 4B illustrates the case where the sealant 41 is applied to the bottom surface 21 of the frame 20, the sealant 41 may also be applied to the edge surface 15 of the laminated glass 10. That is, in this embodiment, the sealant 41 only needs to be applied to at least one of the edge surface 15 of the laminated glass 10 and the bottom surface 21 of the frame 20.

[0052] Next, as shown in Fig. 4C, the edge of the laminated glass 10 is fitted into the opening 22 of the frame 20, and the frame 20 is attached around the edge of the laminated glass 10. Specifically, the edge of the laminated glass 10 is fitted into the opening 22 of the frame 20, and the molten sealant 41 is compressed between the edge surface 15 of the laminated glass 10 and the bottom surface 21 of the frame 20. As a result, the sealant 41 is disposed so as to be crushed between the edge surface 15 of the laminated glass 10 and the bottom surface 21 of the frame 20, as shown in Fig. 4D.

[0053] The manufacturing method described above can be used to manufacture the window glass according to this embodiment. While Figures 4A to 4D show a manufacturing method in which a sash is used as frame 20, the manufacturing method according to this embodiment can also be applied in the same way when the glazing channel shown in Figure 3 is used as frame 30. [Example]

[0054] Next, an example will be described.

[0055] <Sample Preparation> To examine the sealing performance of the sealing material 41, the following samples were prepared. As samples according to Examples 1 to 3a, window glass was produced using the window glass manufacturing method described above, with a sealant 41 provided between the edge surface 15 of the laminated glass 10 and the bottom surface 21 of the frame 20. In the samples according to Examples 1 to 3a, the sealant 41 was provided between the edge surface 15 of the laminated glass 10 and the bottom surface 21 of the frame 20 without being heated (without being thermocompression bonded). At this time, the sealant 41 was provided so as to be crushed between the edge surface 15 of the laminated glass 10 and the bottom surface 21 of the frame 20.

[0056] A 3 mm thick float glass sheet (manufactured by AGC Corporation) was used for the first glass sheet 11 and the second glass sheet 12. A 0.76 mm thick PVB sheet (manufactured by Sekisui Chemical Co., Ltd.) was used for the interlayer film 13. A butyl seal (manufactured by AGC Corporation) was used for the sealant 41. As shown in Table 1, samples (Examples 2a to 3a, respectively) using sealants 41 with thicknesses of 2 mm, 4 mm, 6 mm, and 8 mm were prepared. A sample (Example 1) without sealant 41 was also prepared. The thickness of the sealant 41 is the thickness after it has been provided between the edge surface 15 of the laminated glass 10 and the bottom surface 21 of the frame 20 (i.e., in a compressed state).

[0057] For the samples of Examples 2b to 3b, window glass was produced using the window glass manufacturing method described above, with a sealant 41 provided between the edge surface 15 of the laminated glass 10 and the bottom surface 21 of the frame 20. In the samples of Examples 2b to 3b, the sealant 41 was heated and thermocompression bonded. Other than this, the manufacturing method was the same as that of the samples of Examples 2a to 3a.

[0058] <Sample evaluation> The samples of Examples 1 to 3a and Examples 2b to 3b were left in an environment of 105°C and 100% humidity for 192 hours, and then the rate of change in β-OH was determined at each measurement position for each sample. The rate of change in β-OH was measured by infrared spectroscopy (FT-IR).

[0059] Figure 5 also shows the size and measurement positions of each sample. Each sample is a square measuring 200 mm x 200 mm. The measurement positions are indicated as #1 to #13. That is, the measurement position was set at a height of 85 mm from the bottom end of each sample. The measurement positions were set at the center position as #1, and positions away from the center position #1 to the left were set as #2 to #7, respectively. Similarly, positions away from the center position #1 to the right were set as #8 to #13, respectively. As shown in Figure 5, measurement positions #7 and #13 are the positions closest to the end.

[0060] Table 1 and Figure 6 show the changes in β-OH at each measurement position for samples according to Examples 1 to 3a. Table 2 and Figure 7 show the changes in β-OH at each measurement position for samples according to Examples 2b to 3b. Example 1 is a comparative example, and Examples 2a, 3a, 2b, and 3b are working examples.

[0061] [Table 1]

[0062] [Table 2]

[0063] As shown in Table 1 and Figure 6, in Example 1 (without sealing), the change in β-OH near the edge (#7, #13) was the highest. On the other hand, in Example 2a, where the sealing material was 2 mm thick, and Example 3a, where the sealing material was 4 mm thick, the change in β-OH near the edge (#7, #13) was lower than in Example 1 (without sealing).

[0064] As shown in Table 2 and FIG. 7, when heating (with heat pressing) was performed, the change in β-OH was improved compared to when no heating (without heat pressing) was performed in Example 2b (thickness: 2 mm) and Example 3b (thickness: 4 mm).

[0065] The present invention has been described above in accordance with the above-mentioned embodiment, but the present invention is not limited to the configuration of the above-mentioned embodiment, and naturally includes various modifications, alterations, and combinations that a person skilled in the art can make within the scope of the invention as defined in the claims of this application. [Explanation of symbols]

[0066] 1. Window glass 10. Laminated glass 11 First glass plate 12 Second glass plate 13 Interlayer 15 End face 20 Frame (sash) 21 Bottom 22 Opening 30 Frame (glazing channel) 31 Main body 32, 33 Seal part 41 Encapsulating material

Claims

1. a laminated glass including a first glass plate, a second glass plate disposed so as to face the first glass plate, and an interlayer film disposed between the first glass plate and the second glass plate; a frame provided around an end portion of the laminated glass; a butyl-based sealant provided between the laminated glass and the frame, the frame has a substantially U-shaped cross section, and an opening of the frame is provided so that an edge of the laminated glass fits into the opening, The sealing material is provided so as to be crushed between the end surface of the laminated glass and the bottom surface of the frame. Window glass.

2. 2. The window glass according to claim 1, wherein the sealing material is provided at an end surface of the laminated glass so as to cover the interlayer film provided between the first glass sheet and the second glass sheet.

3. 3. A window glass according to claim 1 or 2, wherein the sealing material is made of an elastically deformable material.

4. 3. The window glass according to claim 1, wherein the sealing material is thermocompression bonded between the end face of the laminated glass and the bottom face of the frame.

5. 3. The window glass according to claim 1, wherein the sealing material has a storage modulus at 25°C of 15 MPa or more and 60 MPa or less.

6. 3. A window pane according to claim 1 or 2, wherein the frame is a sash or a glazing channel.

7. 3. The window glass according to claim 1, wherein a photovoltaic cell is enclosed between the first glass sheet and the second glass sheet of the laminated glass.

8. 8. A glazing according to claim 7, wherein the photovoltaic cell is a perovskite photovoltaic cell.

9. preparing a laminated glass having a first glass plate, a second glass plate disposed so as to face the first glass plate, and an interlayer film disposed between the first glass plate and the second glass plate; preparing a frame having a substantially U-shaped cross section; providing a butyl-based sealant on at least one of the end surface of the laminated glass and the bottom surface of the frame; and fitting the edge of the laminated glass into the opening of the frame body to attach the frame body to the periphery of the edge of the laminated glass, The sealing material is provided so as to be crushed between the end surface of the laminated glass and the bottom surface of the frame. Window glass manufacturing method.

10. In the step of providing the sealing material, a molten sealing material is applied to at least one of the end surface of the laminated glass and the bottom surface of the frame, In the step of attaching the frame to the laminated glass, an edge of the laminated glass is fitted into an opening of the frame, and the molten sealing material is compressed between the edge of the laminated glass and a bottom surface of the frame. A method for manufacturing a window glass according to claim 9.

11. The method for manufacturing a window glass according to claim 9 or 10, wherein the storage modulus of the sealing material at 25°C is 15 MPa or more and 60 MPa or less.

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