Multi-layered glass and high-altitude compatible multi-layered glass

Abstract

To provide multi-layered glass and high-altitude compatible multi-layered glass capable of easily restraining expansion of a hollow layer resulting from changes in pressure.SOLUTION: Multi-layered glass 100 comprises glass plates 10 and 20, and a spacer 30 provided in a spacer region at the peripheries of the glass plates 10 and 20 between the glass plates 10 and 20, wherein a region surrounded by the spacer 30 and the glass plates 10 and 20 constitutes a hollow layer 15. The multi-layered glass further comprises: a check valve 40 which penetrates the spacer 30, one end of which communicates with the hollow layer 15 and the other end of which projects to the outside air side, thereby moving gas from the hollow layer 15 to the outside air side; and a butyl-based sealing member 50 for sealing the check valve 40 and the spacer 30. At least one check valve 40 is attached to the at least one spacer 30. The butyl-based sealing member 50 seals a gap between the portion of the check valve 40 projecting to the outside air side and the spacer 30.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to double glazing and high altitude double glazing. [Background technology]

[0002] In recent years, development of double-glazing glass, which consists of multiple glass sheets stacked together with a spacer between them, has been progressing. When double-glazing glass manufactured in a low-altitude region is transported to a high-altitude region, the air gap between the glass sheets expands due to changes in atmospheric pressure. Therefore, the technology disclosed in Patent Document 1 involves recessing the air gap beforehand during the manufacturing of the double-glazing glass. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-012637 Summary of the Invention [Problem to be solved by the invention]

[0004] The technology disclosed in Patent Document 1 requires the calculation of the amount of expansion that occurs during transportation when manufacturing double-glazing glass, which is time-consuming. Therefore, there has been a demand for the development of a technology that can easily suppress the expansion of the cavity layer caused by changes in air pressure.

[0005] In view of the above problems, an object of the present invention is to provide a double glazing unit and a double glazing unit suitable for high altitudes that can easily suppress the expansion of the cavity caused by changes in atmospheric pressure. [Means for solving the problem]

[0006] A double-glazing unit and a high-altitude double-glazing unit according to one aspect of the present disclosure have the following configuration.

[0007] [1] A double-glazing unit comprising two or more glass plates and at least one spacer disposed between the glass plates in a spacer region on the periphery of the glass plates, wherein the region surrounded by the spacer and the glass plates sandwiching the spacer is a hollow layer, a check valve that penetrates the spacer, has one end communicating with the hollow layer and the other end protruding toward the outside air, and is capable of moving gas from the hollow layer toward the outside air; a butyl-based sealing member that seals the check valve and the spacer, At least one check valve is attached to the at least one spacer; the butyl-based sealing member seals the gap between the portion of the check valve that protrudes toward the outside air and the spacer; Double-glazed glass.

[0008] [2] The double-glazed glass according to [1], wherein the check valve moves gas from the hollow layer side to the outside air side so that the pressure difference between the hollow layer side and the outside air side is 10 kPa or less.

[0009] [3] The check valve has a minimum operating differential pressure of 10 kPa or less at 25°C. [1] or [2].

[0010] [4] The hollow layer is filled with a rare gas. The double glazing according to any one of [1] to [3].

[0011] [5] The hollow layer is filled with air. The double glazing according to any one of [1] to [3].

[0012] [6] the spacer includes a desiccant; The double glazing according to any one of [1] to [5].

[0013] [7] the spacer is made of a thermoplastic resin composition having a JIS A hardness of 10 or more and 90 or less at 25°C; The thermoplastic resin composition comprises The adhesive sheet contains a butyl rubber, a crystalline polyolefin, a desiccant, and an inorganic filler, a proportion of the butyl rubber in a total amount of the butyl rubber and the crystalline polyolefin of 50% by weight or more and 98% by weight or less, and a proportion of the crystalline polyolefin in a total amount of the butyl rubber and the crystalline polyolefin of 2% by weight or more and 50% by weight or less, the ratio of the inorganic filler to 100 parts by weight of the total of the butyl rubber and the crystalline polyolefin is 200 parts by weight or less; The melt viscosity at 120°C is 0.6 kPa·s or more and 7.0 kPa·s or less, and The storage modulus at 25°C is 15 MPa or more and 60 MPa or less. The double glazing according to any one of [1] to [6].

[0014] [8] The check valve is provided at a corner portion where the spacer is bent. The double glazing according to any one of [1] to [7].

[0015] [9] The check valve is provided on a straight portion of the spacer. The double glazing according to any one of [1] to [7].

[0016]

[10] the spacer includes a plurality of tubular members and a plurality of connecting members that connect the tubular members together; The check valve is provided in at least one of the plurality of joining members. The double glazing according to any one of [1] to [6].

[0017]

[11] The check valve is cylindrical and has an outer diameter of 1 mm or more and 16 mm or less at the portion that penetrates the spacer. The double glazing according to any one of [1] to

[10] .

[0018]

[12] The joint length between the part of the check valve that protrudes toward the outside air and the butyl-based sealing member is 1 mm or more and 10 mm or less. The double glazing according to any one of [1] to

[11] .

[0019]

[13] At least one of the two or more glass sheets is laminated glass. The double glazing according to any one of [1] to

[12] .

[0020]

[14]

[14] A double-glazing unit for use at high altitudes, comprising the double-glazing unit according to any one of [1] to

[13] . [Effects of the Invention]

[0021] The present invention can provide double glazing and high altitude double glazing that can easily suppress expansion of the cavity caused by changes in atmospheric pressure. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a schematic front view showing an example of the configuration of a double-glazing unit according to a first embodiment. [Figure 2] 1 is a partially enlarged side view of a double glazing unit according to a first embodiment. [Figure 3] FIG. 2 is a partially enlarged cross-sectional view taken along line III-III in FIG. [Figure 4] 1 is a schematic diagram showing an example of a jig used to measure the dimensions of the insulating glass according to the first embodiment. FIG. [Figure 5] FIG. 2 is a front view of the double-glazed glass with the jig attached. [Figure 6] FIG. 1 is a side view of a double-glazed glass unit with a jig attached thereto. [Figure 7] FIG. 10 is a partially exploded view showing an example of the configuration of a spacer included in a double glazing unit according to a second embodiment. [Figure 8]FIG. 6 is a partially enlarged cross-sectional view showing an example of the configuration of a double glazing unit according to a second embodiment. [Figure 9] FIG. 10 is a schematic front view showing an example of the configuration of a double glazing unit according to a third embodiment. [Figure 10] FIG. 10 is a partially exploded view showing an example of the configuration of a spacer included in a double glazing unit according to a third embodiment. [Figure 11] FIG. 10 is a schematic front view showing an example of the configuration of a double-glazing unit according to a fourth embodiment. [Figure 12] FIG. 10 is a partially enlarged side view of the insulating glass according to the fourth embodiment. [Figure 13] FIG. 13 is a partially enlarged cross-sectional view taken along line XIII-XIII in FIG. [Figure 14] FIG. 10 is a partially enlarged schematic front view showing an example of the configuration of a double-glazing unit according to a fifth embodiment. [Figure 15] FIG. 10 is a partially enlarged side view of a double glazing unit according to a sixth embodiment. [Figure 16] FIG. 11 is a partially enlarged side view of the insulating glass according to a seventh embodiment. [Figure 17] FIG. 13 is a partially enlarged side view of the insulating glass according to the eighth embodiment. [Figure 18] FIG. 13 is a partially enlarged side view of the insulating glass according to the ninth embodiment. [Figure 19] FIG. 20 is a partially enlarged side view of the double glazing according to the tenth embodiment. [Figure 20] FIG. 20 is a partially enlarged side view of the double glazing according to the eleventh embodiment. [Figure 21] FIG. 20 is a partially enlarged side view of a double glazing unit according to a twelfth embodiment. [Figure 22] FIG. 22 is a partially enlarged side view of the double glazing according to the thirteenth embodiment. [Figure 23] FIG. 20 is a partially enlarged side view of the insulating glass according to the fourteenth embodiment. [Figure 24] FIG. 20 is a partially enlarged side view of a double glazing unit according to a fifteenth embodiment. [Figure 25] FIG. 20 is a partially enlarged side view of a double glazing unit according to a sixteenth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each drawing, the same or corresponding elements are designated by the same reference numerals, and for clarity of explanation, duplicate explanations will be omitted as necessary. Furthermore, in this specification, a numerical range indicated by "to" includes the numerical values ​​before and after it as the lower and upper limits.

[0024] <Embodiment 1> FIG. 1 is a schematic front view showing an example of the configuration of double-glazing glass 100 according to embodiment 1. FIG. 2 is a partially enlarged side view of the double-glazing glass 100. FIG. 3 is a partially enlarged cross-sectional view taken along line III-III in FIG. 1. As shown in FIG. 3, the double-glazing glass 100 according to embodiment 1 comprises at least a first glass pane 10, a second glass pane 20, a spacer 30, a check valve 40, and a butyl-based sealing member 50. In the example shown in FIG. 3, the double-glazing glass 100 comprises a primary sealant 60 and a secondary sealant 70 in addition to the above configuration.

[0025] The double-glazing glass 100 is formed by overlapping a first glass sheet 10 and a second glass sheet 20 with a spacer 30 interposed therebetween, thereby providing a hollow layer 15 between the first glass sheet 10 and the second glass sheet 20. The double-glazing glass 100 has excellent thermal insulation performance and is therefore suitable for use as double-glazing. The double-glazing glass 100 is particularly suitable for use as high-altitude double-glazing because it can suppress deformation of the glass sheets due to changes in external air pressure. In the following description, the double-glazing glass 100 is assumed to be arranged so that the first glass sheet 10 faces the outside and the second glass sheet 20 faces the inside.

[0026] Hereinafter, the first glass plate 10 and the second glass plate 20 may be referred to as "(plural) glass plates 10, 20." The glass plates 10, 20 are plate-shaped glass. The composition of the glass constituting the glass plates 10, 20 is not particularly limited. The glass plates 10, 20 may be inorganic glass such as soda-lime silicate glass, aluminosilicate glass, alkali-free glass, or borosilicate glass, or may be organic glass such as polycarbonate glass or acrylic resin glass. The glass plates 10, 20 may be colorless glass such as clear glass, or colored glass such as privacy glass.

[0027] The type of glass constituting the glass plates 10, 20 is not particularly limited. The glass plates 10, 20 may be, for example, float glass (JIS R 3202), figured glass (JIS R 3203), wired glass (JIS R 3204), heat-absorbing glass (JIS R 3208), glass with optical thin film (JIS R 3221), low-reflectivity glass (JIS R 3221), crystallized glass, or frosted glass. Heat-reflecting glass is glass with a metal film that reflects heat rays provided on its surface. When at least one of the glass plates 10, 20 is heat-reflecting glass, the metal film that reflects heat rays is provided on the surface of the glass plate 10, 20 facing the hollow layer 15 or on the surface facing the interior. That is, the metal film that reflects heat rays is provided on either the surface of the first glass plate 10 facing the hollow layer 15 or the main surface of the second glass plate 20. Low-reflection glass is glass with a low-reflection coating on both surfaces.

[0028] Crystallized glass is glass that has been reheated to precipitate crystals inside. Crystallized glass has the property of shrinking as the temperature rises, and by precipitating crystals, the expansion of the glass is cancelled out, bringing the thermal expansion coefficient close to zero. For details of the composition and heat treatment of crystallized glass, see, for example, JP 2003-313053 or JP 2013-082602. Frosted glass is glass that has been roughened by spraying sand onto the surface, and then treated with hydrofluoric acid to make the surface fine and smooth. For details of the composition and treatment method of frosted glass, see, for example, JP 2002-308649.

[0029] The thickness of the glass plates 10 and 20 can be selected depending on the required characteristics of the double-glazed glass, wind pressure resistance, etc. The thickness of the float glass is 3 mm or more and 19 mm or less, and can be selected from, for example, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, 12 mm, 15 mm, and 19 mm. The thickness of the patterned glass is 3 mm or more and 6 mm or less, and can be selected from, for example, 3 mm, 4 mm, 5 mm, and 6 mm. The thickness of the wired glass is 3 mm or more and 10 mm or less, and can be selected from, for example, 3 mm, 6.8 mm, and 10 mm. The thickness of the heat-absorbing glass is 3 mm or more and 8 mm or less, and can be selected from, for example, 5 mm, 6 mm, and 8 mm. The thickness of the heat-reflecting glass is 3 mm or more and 12 mm or less, and can be selected from, for example, 6 mm, 8 mm, 10 mm, and 12 mm. The thickness of the low-reflection glass is 3 mm or more and 10 mm or less, and can be selected from, for example, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, and 10 mm. The thickness of the crystallized glass is 3 mm or more and 19 mm or less, and can be selected from, for example, 1 mm, 2 mm, 3 mm, and 4 mm. The thickness of the frosted glass is 3 mm or more and 19 mm or less, and can be selected from, for example, 5 mm, 6 mm, 8 mm, 10 mm, 12 mm, 15 mm, and 19 mm.

[0030] Float glass, figured glass, heat-absorbing glass, heat-reflecting glass, low-reflecting glass, and frosted glass may be tempered. Examples of tempered glass include double-strengthened glass (JIS R 3222), tempered glass (JIS R 3206), and chemically tempered glass. Chemically tempered glass is glass whose surface is strengthened by a chemical treatment such as ion exchange, and a compressive stress layer is formed on the glass surface. For details of the composition and chemical treatment of chemically tempered glass, see, for example, JP 2016-075122 A. The thickness of double-strengthened glass is 3.0 mm or more and 12 mm or less, and can be selected from, for example, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, and 12 mm. The thickness of tempered glass is 3 mm or more and 12 mm or less, and can be selected from, for example, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, 12 mm, 15 mm, and 19 mm. The thickness of chemically tempered glass is 0.4 mm or more and 6 mm or less, and can be selected from, for example, 0.4 mm, 0.5 mm, 1 mm, 1.3 mm, 2 mm, 3 mm, 4 mm, 5 mm, and 6 mm.

[0031] At least one of the main surfaces of the glass plates 10, 20 may be provided with a coating having various functions. For example, the glass plates 10, 20 may have a heat-reflecting film, such as an infrared-reflecting film or an infrared-absorbing film, or a water-repellent film on the surface that faces the indoor side when installed. An infrared-reflecting film is a film that selectively reflects infrared rays. A water-repellent film is a film that has high water repellency. The glass plates 10, 20 may also have a self-cleaning film or a water-repellent film on the surface that faces the outdoor side when installed. A self-cleaning film is a film that inhibits the adhesion of organic and inorganic substances to the surface, or a film that has the effect of allowing the adhesion of organic and inorganic substances to be easily removed by cleaning, such as wiping, even if they do adhere to the surface.

[0032] A low-emissivity (Low-E) film or other low-emissivity film may be provided on the surface of the glass plates 10 and 20 facing the hollow layer 15. Here, low emissivity refers to reducing heat transfer due to radiation. The low-emissivity film ensures thermal insulation by suppressing heat transfer due to radiation. The configuration of the low-emissivity film is not particularly limited, and may be a low-emissivity film mainly made of silver (Ag) deposited using a sputtering device or the like, or a low-emissivity film mainly made of tin oxide (SnO2) deposited using a chemical vapor deposition device or sputtering device. Furthermore, a low-emissivity film mainly made of silver (Ag) includes a laminate in which a silver film is laminated with an oxide film, a nitride film, or the like. When a low-emissivity film is provided, for example, float glass, heat-absorbing glass, crystallized glass, tempered glass, tempered glass, or chemically strengthened glass is used for the glass plates 10 and 20.

[0033] The thickness of float glass provided with a low-emissivity film is, for example, 3 mm or more and 19 mm or less. The thickness of heat-absorbing glass provided with a low-emissivity film is, for example, 5 mm or more and 8 mm or less. The thickness of heat-strengthened glass provided with a low-emissivity film is, for example, 3 mm or more and 12 mm or less. The thickness of tempered glass provided with a low-emissivity film is, for example, 3 mm or more and 19 mm or less. The thickness of chemically strengthened glass provided with a low-emissivity film is, for example, 0.4 mm or more and 6 mm or less.

[0034] The spacer 30 is a member disposed between the glass sheets 10, 20 to separate the glass sheets 10, 20. The spacer 30 is a tubular member provided in the spacer region on the periphery of the glass sheets 10, 20. For example, if the main surfaces of the glass sheets 10, 20 are rectangular, the spacer 30 is provided along each of the four sides of the glass sheets 10, 20. In other words, the spacer 30 is provided so as to surround the edges of the glass sheets 10, 20. As shown in FIG. 3 , the spacer 30 provided in the double-glazed glass 100 includes a pipe member 31 and a desiccant 32. The pipe member 31 is a hollow member and is made of, for example, a metal such as aluminum or a resin such as PVC. The hollow portion of the pipe member 31 is filled with a desiccant 32. An example of the desiccant 32 is zeolite.

[0035] The hollow layer 15 is an area surrounded by the glass plates 10, 20 and the spacer 30. The gas in the hollow layer 15 is dried by the desiccant 32 contained in the spacer 30. From the viewpoint of improving heat insulation, a rare gas is preferably enclosed in the hollow layer 15. Examples of rare gases include argon gas, xenon gas, and krypton gas. From the viewpoint of ensuring sufficient heat insulation, the thickness of the hollow layer 15 is, for example, 6 mm or more, preferably 10 mm or more, more preferably 12 mm or more, and particularly preferably 15 mm or more.

[0036] The spacer 30 is bonded to the glass plates 10 and 20 using a primary sealant 60. The primary sealant 60 is a butyl-based sealant. Examples of butyl-based sealants include thermoplastic polyisobutylene-based sealants such as SM-488 (manufactured by Kansai Putty Chemical Co., Ltd.). As shown in FIG. 1, the primary sealant 60 is provided to seal between the spacer 30 and the first glass plate 10 and between the spacer 30 and the second glass plate 20. As shown in FIGS. 1 and 3, a secondary sealant 70 is bonded to the edge of the spacer 30 on the glass plates 10 and 20. Examples of the secondary sealant 70 include a silicone-based sealant, a polysulfide-based sealant, a polyurethane-based sealant, and a butyl-based sealant.

[0037] The check valve 40 is disposed so that one end thereof penetrates the spacer 30 and communicates with the hollow layer 15 while the other end thereof protrudes toward the outside air. Here, "communicating" refers to being connected so as to allow gas to move. For example, the check valve 40 is disposed so that one end thereof penetrates the spacer 30 and protrudes into the hollow layer 15 while the other end thereof protrudes toward the outside air. In this case, the check valve 40 includes a penetration portion penetrating the spacer 30, a hollow layer-side protrusion protruding toward the hollow layer 15, and an outside air-side protrusion protruding toward the outside air. The check valve 40 is a valve unit capable of moving gas from the hollow layer 15 toward the outside air. When the double-glazed glass 100 is moved to a higher altitude, i.e., a location with lower air pressure, than the manufacturing site, the gas in the hollow layer 15 expands due to the difference in air pressure. When the gas in the hollow layer 15 expands, i.e., when the pressure increases, the check valve 40 moves gas from the hollow layer 15 side to the outside air side. Therefore, the pressure difference between the inside of the hollow layer 15 and the outside air is kept below the minimum operating pressure difference of the check valve 40. In this way, the double-glazed glass 100 can easily suppress expansion of the hollow layer 15 caused by changes in air pressure.

[0038] From the viewpoint of reducing the risk of damage to the glass sheets 10, 20 due to expansion of the hollow layer 15, the check valve 40 is preferably capable of moving gas from the hollow layer 15 side to the outside air side so that the pressure difference between the hollow layer 15 side and the outside air side is 10 kPa or less. The pressure difference between the hollow layer 15 side and the outside air side is more preferably 8 kPa or less, and particularly preferably 5 kPa or less. Furthermore, the pressure difference between the hollow layer 15 side and the outside air side is 0.5 kPa or more. For example, the check valve 40 preferably has a minimum operating pressure difference of 5 kPa or less at 25°C.

[0039] As shown in FIGS. 2 and 3, the check valve 40 is, for example, a cylindrical member. As shown in FIG. 3, the outer diameter of the check valve 40 is smaller than the thickness of the spacer 30, i.e., the distance between the glass plates 10 and 20. Therefore, the outer diameter of the check valve 40 at the portion that penetrates the spacer 30 is preferably 16 mm or less, more preferably 15 mm or less, and particularly preferably 14 mm or less. Furthermore, from the viewpoint of ensuring sufficient gas movement, the outer diameter of the check valve 40 at the portion that penetrates the spacer 30 is preferably 1 mm or more, more preferably 2 mm or more, and particularly preferably 3 mm or more. Commercially available check valves can be used as the check valve 40, such as a Union Straight Check Valve (manufactured by Pisco), a diaphragm-type check valve (manufactured by AS ONE), a check valve (manufactured by SAMPLATEC), and a diaphragm-type one-way valve (manufactured by KIJIMA).

[0040] The butyl-based sealing member 50 is a sealant that seals the gap between the outside air side protrusion of the check valve 40 and the spacer 30. A butyl-based sealing material such as SM-488 (manufactured by Kansai Putty Chemical Co., Ltd.) is used as the butyl-based sealing member 50 to prevent moisture from entering the hollow layer 15. As shown in FIG. 3, the butyl-based sealing member 50 may be provided with a triangular cross section. To ensure sufficient adhesion, the joint length t (see FIG. 3) between the outside air side protrusion of the check valve 40 and the butyl-based sealing member 50 is 0.5 mm or more, preferably 1 mm or more, more preferably 1.5 mm or more, and particularly preferably 2 mm or more. To reduce the amount of sealant used, the joint length t is preferably 10 mm or less, more preferably 9 mm or less, and particularly preferably 8 mm or less.

[0041] From the viewpoint of improving long-term reliability, the double glazing 100 may be installed at high altitude and pressure adjusted, and then a plug made of, for example, metal, resin, or composite material may be attached to the outside air side of the check valve.

[0042] Here, an example of a procedure for measuring the dimensions of double-glazing glass 100 will be described. FIG. 4 is a schematic diagram showing an example of a jig 1000 used to measure the dimensions of double-glazing glass 100. As shown in FIG. 4, the jig 1000 is formed by combining three mutually orthogonal plate-shaped members. Two of the three plate-shaped members constituting the jig 1000 have a rectangular notch at one corner, i.e., an L-shape. The remaining plate-shaped member has no notch. The jig 1000 is formed by bonding two plate-shaped members with cutouts orthogonally to each other so that the cutout portions are adjacent to each other, and then bonding the remaining plate-shaped member so that the edge on the side where the cutout portion is provided is aligned. The three plate-shaped members all have approximately the same thickness. The jig 1000 formed in this manner has cutout portions 1100 and corner portions 1200. The two edges of the corner portion 1200 overlap with the inner edges of the cutout portion 1100 when viewed in the direction of the arrow shown in FIG.

[0043] FIG. 5 is a front view of the double-glazing glass 100 with the jig 1000 attached. FIG. 6 is a side view of the double-glazing glass 100 with the jig 1000 attached. As shown in FIGS. 5 and 6 , when measuring the dimensions of the double-glazing glass 100, the jig 1000 is attached so that the cutouts 1100 are aligned with both ends of the side to be measured. At this time, the jig 1000 is positioned so that the inside of the plate-like member that forms the cutout 1100 is in contact with at least one glass pane included in the double-glazing glass 100. When the jig 1000 is attached in this manner, the jig 1000 comes into contact with the edge of the outermost glass pane included in the double-glazing glass 100. For example, in the example shown in FIG. 6 , at the right end, the first glass pane 10 included in the double-glazing glass 100 is located outermost, and the jig 1000 is in contact with the first glass pane 10. On the other hand, at the left end, the second glass sheet 20 is positioned outermost, and the jig 1000 is in contact with the second glass sheet 20. In this state, the dimensions of the double-glazed glass 100 can be measured by measuring the distance between the edges of the corners 1200 of the two jigs 1000, i.e., the distance indicated by the double arrows in Figure 6. The magnitude of the sheet misalignment of the double-glazed glass 100 can be measured by calculating the difference between the measured dimension and the dimension of each glass sheet 10, 20.

[0044] <Embodiment 2> In the first embodiment, a case where a check valve is inserted through the spacer itself has been described. However, a spacer used in double glazing may be formed by joining multiple tubular members together using a joining member. In this case, the check valve may be inserted through the joining member. In the second embodiment, a case where a check valve is inserted through the joining member will be described. Figure 7 is a partially exploded view showing an example of the configuration of a spacer 80 included in a double glazing unit 200 according to the second embodiment. Figure 8 is a partially enlarged cross-sectional view showing an example of the configuration of the double glazing unit 200.

[0045] The double-glazing glass 200 differs from the double-glazing glass 100 in that it includes a spacer 80 instead of the spacer 30. The rest of the configuration of the double-glazing glass 200 is the same as that of the double-glazing glass 100, so a description thereof will be omitted. As shown in FIG. 7 , the spacer 80 includes a plurality of tubular members 81, 82 and a connecting member 83. Similar to the spacer 30 described in the first embodiment, the plurality of tubular members 81, 82 are members whose hollow portions are filled with a desiccant. Recesses are provided at the ends of the plurality of tubular members 81, 82 into which the connecting member 83 is fitted.

[0046] The connecting member 83 is a member that connects the multiple tubular members 81, 82. The connecting member 83 is made of, for example, the same material as the hollow portions that make up the multiple tubular members 81, 82. Both ends of the connecting member 83 are provided with protrusions that are shaped to fit into recesses provided at the ends of the tubular members 81, 82. The multiple tubular members 81, 82 are connected by engaging the recesses provided on the multiple tubular members 81, 82 with the protrusions provided on the connecting member 83. Note that only two tubular members 81, 82 and one connecting member 83 are shown in FIG. 7.

[0047] In the example shown in Figure 7, the check valve 40 passes through the connecting member 83. The check valve 40 is provided by passing through at least one of the connecting members provided on the spacer 80. Figure 8 is a cross-sectional view of the double-glazed glass 200 near the connecting member 83 through which the check valve 40 passes. Because the double-glazed glass 200 has the check valve 40 passing through the connecting member 83, assembly of the spacer 80 is easy.

[0048] <Embodiment 3> In the second embodiment, a case where a check valve is inserted through a connecting member that connects tubular members in a straight line is described. However, the connecting member may also connect tubular members perpendicularly. In the third embodiment, a case where a check valve is inserted through a connecting member that connects tubular members perpendicularly is described.

[0049] The double-glazing glass 300 according to the third embodiment differs from the double-glazing glass 200 in that it includes a spacer 90 instead of the spacer 80. Fig. 9 is a schematic front view showing an example configuration of the double-glazing glass 300. As shown in Fig. 9, the double-glazing glass 300 has a check valve 40 passing through the corner where the spacer 90 bends. This shortens the length of the part of the check valve 40 that protrudes toward the hollow layer 15, reducing obstruction to visibility through the double-glazing glass 300.

[0050] Figure 10 is a partially exploded view showing an example of the configuration of a spacer 90 included in a double-glazing glass 300. The spacer 90 includes a plurality of tubular members 91, 92 and a connecting member 93. As shown in Figure 10, the connecting member 93 has obliquely extending protrusions on both ends. Therefore, by engaging the recesses of the plurality of tubular members 91, 92 with the protrusions of the connecting member 93, the plurality of tubular members 91, 92 are connected perpendicularly.

[0051] <Embodiment 4> In the first to third embodiments, the present invention is described as being applied to double glazing having a spacer in which a desiccant is filled in the hollow portion. However, the present invention can also be applied to other spacers. In the fourth embodiment, the present invention is described as being applied to double glazing having a spacer in which a desiccant is mixed in a resin.

[0052] Fig. 11 is a schematic front view showing an example configuration of a double-glazing unit 400 according to embodiment 4. Fig. 12 is a partially enlarged side view of the double-glazing unit 400. Fig. 13 is a partially enlarged cross-sectional view taken along line XIII-XIII in Fig. 11. As shown in Fig. 13, the double-glazing unit 400 differs from the double-glazing unit 100 in that it includes a spacer 110 instead of the spacer 30 and does not include the primary sealant 60 or the secondary sealant 70.

[0053] The spacer 110 is made of a thermoplastic resin composition. From the viewpoint of adequately maintaining its shape, the thermoplastic resin composition constituting the spacer 110 preferably has a JIS A hardness at 25°C of 10 or more, more preferably 25 or more, and particularly preferably 30 or more. From the viewpoint of suppressing stress applied to the glass plates 10 and 20, the thermoplastic resin composition constituting the spacer 110 preferably has a JIS A hardness at 25°C of 90 or less, more preferably 85 or less, and particularly preferably 80 or less.

[0054] The thermoplastic resin composition constituting the spacer 110 includes butyl rubber, crystalline polyolefin, a desiccant, and an inorganic filler. Examples of butyl rubber include butyl rubber, polyisobutylene, and halogenated butyl rubber, which are copolymers primarily composed of isobutylene and isoprene. Crystalline polyolefins are crystalline homopolymers of olefins such as ethylene and propylene, copolymers with other monomers, and modified products thereof. Examples of desiccants include zeolite, silica gel, and alumina. Examples of inorganic fillers include calcium carbonate, talc, mica, and carbon black.

[0055] The proportion of the butyl rubber relative to the total amount of the butyl rubber and the crystalline polyolefin is preferably 50% by weight or more, more preferably 55% by weight or more, and particularly preferably 60% by weight or more, from the viewpoint of fully exhibiting the properties of the butyl rubber. The proportion of the butyl rubber relative to the total amount of the butyl rubber and the crystalline polyolefin is preferably 98% by weight or less, more preferably 96% by weight or less, and particularly preferably 95% by weight or less, from the viewpoint of increasing the hardness of the butyl rubber. The proportion of the crystalline polyolefin relative to the total amount of the butyl rubber and the crystalline polyolefin is preferably 2% by weight or more, more preferably 4% by weight or more, and particularly preferably 5% by weight or more. The proportion of the crystalline polyolefin relative to the total amount of the butyl rubber and the crystalline polyolefin is preferably 50% by weight or less, more preferably 45% by weight or less, and particularly preferably 40% by weight or less.

[0056] From the viewpoint of suppressing an increase in the melt viscosity of the thermoplastic resin composition and suppressing a decrease in the tensile strength and tear strength, the proportion of the inorganic filler relative to 100 parts by weight of the total of the butyl rubber and the crystalline polyolefin is preferably 200 parts by weight or less, more preferably 150 parts by weight or less, even more preferably 130 parts by weight or less, particularly preferably 100 parts by weight or less, and even more preferably 90 parts by weight or less.

[0057] From the viewpoint of ensuring that the spacer material has a viscosity that allows it to be molded, the melt viscosity of the thermoplastic resin composition at 120°C is preferably 0.6 kPa·s or more, more preferably 1.0 kPa·s or more, and particularly preferably 1.0 kPa·s or more. From the viewpoint of reducing the burden on the molding machine, the melt viscosity of the thermoplastic resin composition at 120°C is preferably 7.0 kPa·s or less, more preferably 5.0 kPa·s or less, and particularly preferably 4.5 kPa·s or less.

[0058] From the viewpoint of maintaining the shape of the double glazing 400, the storage modulus of the thermoplastic resin composition at 25°C is preferably 15 MPa or more, more preferably 20 MPa or more. From the viewpoint of stress relaxation against deformation of the hollow layer 15 due to temperature changes, the storage modulus of the thermoplastic resin composition at 25°C is preferably 60 MPa or less, more preferably 50 MPa or less.

[0059] The spacer 110 is bonded to the glass plates 10 and 20 using a primer 120. Examples of the primer 120 include urethane adhesives, polyester adhesives, epoxy adhesives, α-cyanoacrylate adhesives, and acrylic adhesives containing a compound having a hydrolyzable silyl group. However, any adhesive for glass / resin can be used. Furthermore, if the adhesive strength between the glass plates 10 and 20 and the spacer 110 is sufficient, the primer 120 may be omitted. When manufacturing the double-glazed glass 400, the primer 120 is applied to the glass plates 10 and 20 at the locations where the spacer 110 is to be installed, and then a thermoplastic resin composition is extruded to form the spacer 110 and bond it to the glass plates 10 and 20. For details of the specific procedures and materials used when using a thermoplastic resin composition as the spacer 110, see Japanese Patent No. 7092119.

[0060] As described above, in the case of double glazing 400, the spacer 110 is formed on the glass plate, so it is easy to insert the check valve 40 through the spacer 110. Furthermore, the double glazing 400 does not require the provision of a primary sealant 60 and a secondary sealant 70, reducing the number of steps required for manufacturing. Furthermore, although not shown in Figure 11 etc., the secondary sealant 70 may be provided on the outer periphery of the spacer 110.

[0061] <Embodiment 5> In the fourth embodiment, a check valve is inserted through a straight portion of a resin spacer containing a desiccant. However, the check valve may be inserted through any portion of the spacer. In the fifth embodiment, a check valve is inserted through a corner portion of the spacer. FIG. 14 is a partially enlarged schematic front view showing an example configuration of a double-glazed glass 500 according to the fifth embodiment. As shown in FIG. 14, the double-glazed glass 500 has a check valve 40 inserted through a corner portion of the spacer 110. This shortens the length of the portion of the check valve 40 that protrudes toward the hollow layer 15, reducing obstruction to visibility through the double-glazed glass 500.

[0062] <Embodiment 6> In the first to fifth embodiments, the double-glazing unit includes two glass panes 10 and 20 and one spacer 30. However, the present invention is also applicable to double-glazing units including three or more glass panes and two or more spacers. In the sixth embodiment, a double-glazing unit including three glass panes is described. FIG. 15 is a partially enlarged schematic side view showing an example configuration of a double-glazing unit 600 according to the sixth embodiment. As shown in FIG. 15, the double-glazing unit 600 includes, in this order, a first glass pane 10, a first spacer (not shown), a second glass pane 20, a second spacer (not shown), and a third glass pane 30. A secondary sealant 71 is provided on the edge of the first spacer. A secondary sealant 72 is provided on the edge of the second spacer. A check valve 41 is provided through the first spacer. A check valve 42 is provided through the second spacer. This configuration makes it possible to suppress expansion in each of the two hollow layers due to changes in air pressure. The composition, type, and thickness of the glass constituting the third glass sheet 30 may be the same as those of the glass sheets 10 and 20 described in embodiment 1. In the double glazing 600, a low-emissivity coating may be provided on the surface of the first glass sheet 10 facing the hollow layer, i.e., the surface facing the second glass sheet 20. A low-emissivity coating may also be provided on at least one main surface of the second glass sheet 20. A low-emissivity coating may also be provided on the surface of the third glass sheet 30 facing the hollow layer, i.e., the surface facing the second glass sheet 20. For example, assuming that "CT1.3mm" indicates chemically strengthened glass with a thickness of 1.3 mm and "A10mm" indicates a hollow layer with a width of 10 mm, an example of a double glazing 600 according to embodiment 6 constructed using these glass sheets would be CT1.3mm+A10mm+CT1.3mm+A10mm+CT1.3mm. Furthermore, if "CT0.5mm" indicates chemically strengthened glass with a plate thickness of 0.5mm, the double glazing 600 may be CT0.5mm+A10mm+CT0.5mm+A10mm+CT0.5mm.

[0063] <Embodiment 7> In the first to sixth embodiments, the glass plates 10, 20, and 30 are each a single pane of glass. However, the present invention is also applicable to double-glazing in which at least one of the glass plates is laminated glass. In the seventh embodiment, the double-glazing is configured such that the glass plate facing the interior of the room is laminated glass. FIG. 16 is a partially enlarged schematic side view showing an example of the configuration of a double-glazing unit 610 according to the seventh embodiment. The double-glazing unit 610 differs from the double-glazing unit 100 shown in FIG. 2 in that it includes a second laminated glass 21 instead of the second glass plate 20. The second laminated glass 21 includes a glass plate 22, an interlayer film 23, and a glass plate 24, in this order. The second laminated glass 21 may be provided with a low-emissivity film on the surface facing the cavity, i.e., the surface facing the first glass plate 10.

[0064] The composition, type, and thickness of the glass constituting the glass plates 22, 24 may be the same as those of the glass plates 10, 20 described in the first embodiment. The composition, type, and thickness of the glass constituting the glass plates 22, 24 may be the same as or different from each other. The interlayer film 23 is a resin film. Examples of resins constituting the interlayer film 23 include polyvinyl butyral (PVB), ionomer resin, polyvinyl alcohol (PVA), ethylene-vinyl acetate copolymer (EVA), and polyurethane resin. The thickness of the interlayer film 23 is, for example, 0.38 mm or more and 5.0 mm or less. The thickness of the interlayer 23 can be selected from, for example, 1.5 mm (60 mils), 2.3 mm (90 mils), 3 mm (120 mils), 3.8 mm (150 mils), and 4.6 mm depending on the required properties of the double-glazing, impact resistance, etc. If a double-glazing unit 610 with excellent impact resistance is desired, it is preferable to at least one of increase the thickness of the interlayer and use an ionomer resin.

[0065] For example, if "HS4mm" denotes heat-strengthened glass with a thickness of 4 mm, "SG3mm" denotes ionomer resin with a thickness of 3 mm, "A12mm" denotes a hollow layer with a width of 12 mm, and "()" denotes laminated glass, examples of double-glazed glass 610 according to embodiment 7 constructed using these include HS4mm+A12mm+(HS4mm+SG3mm+HS4mm). Further examples of double-glazed glass 610 according to embodiment 7 include HS10mm+A12mm+(HS3mm+SG3mm+HS3mm) and HS10mm+A12mm+(HS3mm+SG3.8mm+HS3mm). If "FL3mm" indicates float glass with a thickness of 3mm, "PVA2.3mm" indicates polyvinyl alcohol resin with a thickness of 2.3mm, and "A8mm" indicates a hollow layer with a width of 8mm, an example of a double-glazed glass 610 according to the seventh embodiment constructed using these components would be FL3mm+A12mm+(FL3mm+PVB1.5mm+FL3mm). If "TG3mm" indicates tempered glass with a thickness of 3mm and "PVA2.3mm" indicates polyvinyl alcohol resin with a thickness of 2.3mm, an example of a double-glazed glass 610 according to the seventh embodiment constructed using these components would be TG4mm+A8mm+(TG4mm+PVA2.3mm+TG4mm). Furthermore, if "PVB0.76mm" indicates polyvinyl butyral resin with a thickness of 0.76mm, an example of a double-glazed glass 610 according to the seventh embodiment constructed using these components would be FL3mm+A10mm+(FL3mm+PVB0.76mm+FL3mm).

[0066] <Embodiment 8> In the eighth embodiment, the double-glazed glass panel includes two glass panes, one of which faces the outside of the room and is laminated glass. FIG. 17 is a partially enlarged schematic side view showing an example of the configuration of a double-glazed glass panel 620 according to the eighth embodiment. The double-glazed glass panel 620 differs from the double-glazed glass panel 100 shown in FIG. 2 in that it includes a first laminated glass panel 11 instead of the first glass panel 10. The first laminated glass panel 11 includes, in this order, a glass panel 12, an interlayer film 13, and a glass panel 14. The composition, type, and thickness of the glass panels and interlayer film constituting the first laminated glass panel 11 may be the same as those of the second laminated glass panel 21 described in the seventh embodiment. The first laminated glass panel 11 may also be provided with a low-emissivity coating on the surface facing the hollow layer, i.e., the surface facing the second glass panel 20. For example, the double-glazed glass panel 620 according to the eighth embodiment may include (HS4mm+SG3mm+HS4mm)+A12mm+HS4mm. Examples of the double glazing 620 according to the eighth embodiment include (FL 3 mm + PVB 1.5 mm + FL 3 mm) + A 12 mm + FL 3 mm, (TG 4 mm + PVA 2.3 mm + TG 4 mm) + A 8 mm + TG 4 mm, and (FL 3 mm + PVB 0.76 mm + FL 3 mm) + A 10 mm + FL 3 mm.

[0067] <Embodiment 9> In embodiment 9, both of the two glass plates constituting the double-glazing glass are laminated glass. Fig. 18 is a partially enlarged schematic side view showing an example configuration of a double-glazing glass 630 according to embodiment 9. The double-glazing glass 630 differs from the double-glazing glass 100 shown in Fig. 2 in that it includes a first laminated glass 11 instead of the first glass 10, and a second laminated glass 21 instead of the second glass 20. For example, the double-glazing glass 630 according to embodiment 9 may be (HS4mm + SG3mm + HS4mm) + A12mm + (HS4mm + SG3mm + HS4mm). Examples of the double-glazed glass 630 according to the ninth embodiment include (FL3mm + PVB1.5mm + FL3mm) + A12mm + (FL3mm + PVB1.5mm + FL3mm), (TG4mm + PVA2.3mm + TG4mm) + A8mm + (TG4mm + PVA2.3mm + TG4mm), and (FL3mm + PVB0.76mm + FL3mm) + A8mm + (FL3mm + PVB0.76mm + FL3mm).

[0068] <Embodiment 10> In the tenth embodiment, the double-glazing unit includes three glass panes, and the glass pane facing the interior is laminated glass. FIG. 19 is a partially enlarged schematic side view showing an example of the configuration of a double-glazing unit 640 according to the tenth embodiment. The double-glazing unit 640 differs from the double-glazing unit 600 shown in FIG. 15 in that it includes a third laminated glass pane 31 instead of the third glass pane 30. The third laminated glass pane 31 includes, in this order, a glass pane 32, an interlayer film 33, and a glass pane 34. The composition, type, and thickness of the glass panes and interlayer film constituting the third laminated glass pane 31 may be the same as those of the second laminated glass pane 21 described in the seventh embodiment. The third laminated glass pane 31 may also be provided with a low-emissivity coating on the surface facing the hollow layer, i.e., the surface facing the second glass pane 20. For example, the double-glazing unit 640 according to the tenth embodiment may be HS4mm+A12mm+HS4mm+A12mm+(HS4mm+SG3mm+HS4mm). The double glazing 640 according to the tenth embodiment may be FL3mm+A12mm+FL3mm+A12mm+(FL3mm+PVB1.5mm+FL3mm), TG4mm+A8mm+TG4mm+A8mm+(TG4mm+PVA2.3mm+TG4mm), FL3mm+A6mm+FL3mm+A6mm+(FL3mm+PVA2.3mm+FL3mm), HS4mm+A6mm+HS4mm+A6mm+(HS4mm+SG2.3mm+HS4mm) m), TG4mm+A6mm+TG4mm+A6mm+(TG4mm+SG2.3mm+TG4mm), CT1.3mm+A6mm+CT1.3mm+A6mm+(CT1.3mm+SG2.3mm+CT1.3mm), CT0.5mm+A8mm+CT0.5mm+A8mm+(CT0.5mm+SG2.3mm+CT0.5mm), FL3mm+A8mm+FL3mm+A8mm+(FL3mm+PVB0.76mm+FL3mm), etc.

[0069] <Embodiment 11> In embodiment 11, the double-glazing glass is configured such that the outdoor-facing glass sheet of the three glass sheets constituting the double-glazing glass is laminated glass. Fig. 20 is a partially enlarged schematic side view showing an example configuration of a double-glazing glass 650 according to embodiment 11. The double-glazing glass 650 differs from the double-glazing glass 600 shown in Fig. 15 in that it includes a first laminated glass sheet 11 instead of the first glass sheet 10. For example, the double-glazing glass 650 according to embodiment 11 may be configured as (HS4mm+SG3mm+HS4mm)+A12mm+HS4mm+A12mm+HS4mm. The double-glazed glass 650 according to the eleventh embodiment may be (FL3mm+PVB1.5mm+FL3mm)+A12mm+FL3mm+A12mm+FL3mm, (TG4mm+PVA2.3mm+TG4mm)+A8mm+TG4mm+A8mm+TG4mm, (FL3mm+PVA2.3mm+FL3mm)+A6mm+FL3mm+A6mm+FL3mm, (HS4mm+SG2.3mm+HS4mm) m) + A6mm + HS4mm + A6mm + HS4mm, (CT1.3mm + SG2.3mm + CT1.3mm) + A6mm + CT1.3mm + A6mm + CT1.3mm, (CT0.5mm + SG2.3mm + CT0.5mm) + A8mm + CT0.5mm + A8mm + CT0.5mm, (FL3mm + PVB0.76mm + FL3mm) + A8mm + FL3mm + A8mm + FL3mm, etc.

[0070] <Embodiment 12> In embodiment 12, the double-glazing glass 660 includes three glass panes, one on the outdoor side and one on the indoor side, each of which is laminated glass. Fig. 21 is a partially enlarged schematic side view showing a configuration example of a double-glazing glass 660 according to embodiment 12. The double-glazing glass 660 differs from the double-glazing glass 600 shown in Fig. 15 in that it includes a first laminated glass 11 instead of the first glass pane 10 and a third laminated glass 31 instead of the third glass pane 30. For example, the double-glazing glass 660 according to embodiment 12 may be (HS4mm + SG3mm + HS4mm) + A12mm + HS4mm + A12mm + (HS4mm + SG3mm + HS4mm). The double-glazed glass 660 according to the twelfth embodiment may be (FL3mm+PVB1.5mm+FL3mm)+A12mm+FL3mm+A12mm+(FL3mm+PVB1.5mm+FL3mm), (TG4mm+PVA2.3mm+TG4mm)+A8mm+TG4mm+A8mm+(TG4mm+PVA2.3mm+TG4mm), (FL3mm+PVA2.3mm+FL3mm)+A6mm+FL3mm+A6mm+(FL3mm+PVA2.3mm+FL3mm), (HS4mm+SG2.3mm+HS4mm)+A6mm+HS 4mm+A6mm+(HS4mm+SG2.3mm+HS4mm), (CT1.3mm+SG2.3mm+CT1.3mm)+A6mm+CT1.3mm+A6mm+(CT1.3mm+SG2.3mm+CT1.3mm), (CT0.5mm+SG2.3mm+CT0 .5mm)+A8mm+CT0.5mm+A8mm+(CT0.5mm+SG2.3mm+CT0.5mm), (FL3mm+PVB0.76mm+FL3mm)+A6mm+FL3mm+A6mm+(FL3mm+PVB0.76mm+FL3mm), etc.

[0071] <Embodiment 13> In the thirteenth embodiment, the double-glazing glass 670 includes three glass sheets, and the central glass sheet is a laminated glass. FIG. 22 is a partially enlarged schematic side view showing a configuration example of a double-glazing glass 670 according to the thirteenth embodiment. The double-glazing glass 670 differs from the double-glazing glass 600 shown in FIG. 15 in that it includes a second laminated glass 21 instead of the second glass sheet 20. In addition, in the double-glazing glass configured using three glass sheets and two spacers, the second laminated glass 21 may be provided with a low-emissivity film on at least one main surface. For example, the double-glazing glass 670 according to the thirteenth embodiment may be configured as HS4mm+A12mm+(HS4mm+SG3mm+HS4mm)+A12mm+HS4mm. The double-glazed glass 670 according to the thirteenth embodiment may be any of the following: FL3mm+A12mm+(FL3mm+PVB1.5mm+FL3mm)+A12mm+FL3mm, TG4mm+A8mm+(TG4mm+PVA2.3mm+TG4mm)+A8mm+TG4mm, FL3mm+A6mm+(FL3mm+PVA2.3mm+FL3mm)+A6mm+FL3mm, HS4mm+A6mm+(HS4mm+S Examples include G2.3mm + HS4mm) + A6mm + HS4mm, CT1.3mm + A6mm + (CT1.3mm + SG2.3mm + CT1.3mm) + A6mm + CT1.3mm, CT0.5mm + A8mm + (CT0.5mm + SG2.3mm + CT0.5mm) + A8mm + CT0.5mm, and FL3mm + A6mm + (FL3mm + PVB0.76mm + FL3mm) + A6mm + FL3mm.

[0072] <Embodiment 14> In the fourteenth embodiment, the central glass pane and the indoor-facing glass pane of the three glass panes constituting the double-glazing glass are laminated glasses. Fig. 23 is a partially enlarged schematic side view showing an example configuration of a double-glazing glass 680 according to the fourteenth embodiment. The double-glazing glass 680 differs from the double-glazing glass 600 shown in Fig. 15 in that it includes a second laminated glass pane 21 instead of the second glass pane 20 and a third laminated glass pane 31 instead of the third glass pane 30. For example, the double-glazing glass 680 according to the fourteenth embodiment may be HS4mm+A12mm+(HS4mm+SG3mm+HS4mm)+A12mm+(HS4mm+SG3mm+HS4mm). The double-glazed glass 680 according to the fourteenth embodiment may be FL3mm+A12mm+(FL3mm+PVB1.5mm+FL3mm)+A12mm+(FL3mm+PVB1.5mm+FL3mm), TG4mm+A8mm+(TG4mm+PVA2.3mm+TG4mm)+A8mm+(TG4mm+PVA2.3mm+TG4mm), FL3mm+A6mm+(FL3mm+PVA2.3mm+FL3mm)+A6mm+(FL3mm+PVA2.3mm+FL3mm), HS4mm+A6mm+(HS4mm+SG2.3mm+HS4mm) mm)+A6mm+(HS4mm+SG2.3mm+HS4mm), CT1.3mm+A6mm+(CT1.3mm+SG2.3mm+CT1.3mm)+A6mm+(CT1.3mm+SG2.3mm+CT1.3mm), CT0.5mm+A8mm+(CT0.5m m+SG2.3mm+CT0.5mm)+A8mm+(CT0.5mm+SG2.3mm+CT0.5mm), FL3mm+A6mm+(FL3mm+PVB0.76mm+FL3mm)+A6mm+(FL3mm+PVB0.76mm+FL3mm), etc.

[0073] <Embodiment 15> In the fifteenth embodiment, the outdoor-facing glass plate and the central glass plate of the three glass plates constituting the double-glazing glass are laminated glass. Fig. 24 is a partially enlarged schematic side view showing an example configuration of a double-glazing glass 690 according to the fifteenth embodiment. The double-glazing glass 690 differs from the double-glazing glass 600 shown in Fig. 15 in that it includes a first laminated glass plate 11 instead of the first glass plate 10 and a second laminated glass plate 21 instead of the second glass plate 20. For example, the double-glazing glass 690 according to the fifteenth embodiment may have a configuration of (HS4mm + SG3mm + HS4mm) + A12mm + (HS4mm + SG3mm + HS4mm) + A12mm + HS4mm. The double-glazed glass 690 according to the fifteenth embodiment may include (FL3mm+PVB1.5mm+FL3mm)+A12mm+(FL3mm+PVB1.5mm+FL3mm)+A12mm+FL3mm, (TG4mm+PVA2.3mm+TG4mm)+A8mm+(TG4mm+PVA2.3mm+TG4mm)+A8mm+TG4mm, (FL3mm+PVA2.3mm+FL3mm)+A6mm+(FL3mm+PVA2.3mm+FL3mm)+A6mm+FL3mm, (HS4mm+SG2.3mm+HS4mm)+A6mm+(H S4mm+SG2.3mm+HS4mm)+A6mm+HS4mm, (CT1.3mm+SG2.3mm+CT1.3mm)+A6mm+(CT1.3mm+SG2.3mm+CT1.3mm)+A6mm+CT1.3mm, (CT0.5mm+SG2.3mm+CT0 .5mm)+A8mm+(CT0.5mm+SG2.3mm+CT0.5mm)+A8mm+CT0.5mm, (FL3mm+PVB0.76mm+FL3mm)+A6mm+(FL3mm+PVB0.76mm+FL3mm)+A6mm+FL3mm, etc.

[0074] <Embodiment 16> In embodiment 16, all three glass panes constituting the double-glazing glass are laminated glass. Fig. 25 is a partially enlarged schematic side view showing an example configuration of a double-glazing glass 700 according to embodiment 15. The double-glazing glass 700 differs from the double-glazing glass 600 shown in Fig. 15 in that it includes a first laminated glass 11 instead of the first glass pane 10, a second laminated glass 21 instead of the second glass pane 20, and a third laminated glass instead of the third glass pane 30. For example, the double-glazing glass 700 according to embodiment 16 may have a configuration of (HS4mm+SG3mm+HS4mm)+A12mm+(HS4mm+SG3mm+HS4mm)+A12mm+HS4mm+SG3mm+HS4mm). The double-glazed glass 700 according to the sixteenth embodiment may be (FL3mm + PVB1.5mm + FL3mm) + A12mm + (FL3mm + PVB1.5mm + FL3mm) + A12mm + (FL3mm + PVB1.5mm + FL3mm), (TG4mm + PVA2.3mm + TG4mm) + A8mm + (TG4mm + PVA2.3mm + TG4mm) + A8mm + (TG4mm + PVA2.3mm + TG4mm), (FL3mm + PVA2.3mm + FL3mm) + A6mm + (FL3mm + PVA2.3mm + FL3mm) + A6mm + (FL3mm + PVA2.3mm + FL3mm), (HS4mm + SG2.3mm + HS4mm) + A6mm + (HS4mm + SG2.3mm). 3mm+HS4mm)+A6mm+(HS4mm+SG2.3mm+HS4mm), (CT1.3mm+SG2.3mm+CT1.3mm)+A6mm+(CT1.3m m+SG2.3mm+CT1.3mm)+A6mm+(CT1.3mm+SG2.3mm+CT1.3mm), (CT0.5mm+SG2.3mm+CT0.5mm)+ Examples include A8mm+(CT0.5mm+SG2.3mm+CT0.5mm)+A8mm+(CT0.5mm+SG2.3mm+CT0.5mm), (FL3mm+PVB0.76mm+FL3mm)+A6mm+(FL3mm+PVB0.76mm+FL3mm)+A6mm+(FL3mm+PVB0.76mm+FL3mm).

[0075] Compared to single-pane glass, laminated glass has superior disaster prevention and crime prevention properties. Therefore, by using laminated glass for some or all of the glass plates that make up the double-glazing glass as described in embodiments 7 to 16, the disaster prevention and crime prevention properties of the double-glazing glass are improved. By making the thicknesses and types of the two glass plates that make up the laminated glass different from each other, the disaster prevention and crime prevention properties of the double-glazing glass are further improved. Furthermore, by making the thicknesses and types of the glass plates that make up the double-glazing glass different from each other, each glass plate exhibits different shatter resistance against glass breaking forces from outside the room, resulting in double-glazing that is more resistant to breakage and penetration.

[0076] 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]

[0077] 100,200,300,400,500,600,610,620,630,640,650,660,670,680,690,700 Double glazing 10, 20, 30 glass plates 11, 21, 31 Laminated glass 12, 14, 22, 24, 32, 34 Glass plates 13, 23, 33 Interlayer 15 Hollow layer 30,80,90 spacer 31 Pipe material 32 Desiccant 40, 41, 42 Check valve 50 Butyl-based sealing material 60 Primary sealing material 70, 71, 72 Secondary sealing material 81, 82, 91, 92 Tubular members 83,93 Connecting members 110 Spacer 120 Primer 1000 Jigs 1100 Notch 1200 Corner

Claims

1. A double-glazing unit comprising two or more glass plates and at least one spacer disposed between the glass plates in a spacer region on the periphery of the glass plates, wherein an area surrounded by the spacer and the glass plates sandwiching the spacer is a hollow layer, a check valve that penetrates the spacer, has one end communicating with the hollow layer and the other end protruding toward the outside air, and is capable of moving gas from the hollow layer toward the outside air; a butyl-based sealing member that seals the check valve and the spacer, At least one check valve is attached to the at least one spacer; The butyl-based sealing member seals the gap between the portion of the check valve that protrudes toward the outside air and the spacer. Double-glazed glass.

2. The double-glazing unit according to claim 1 , wherein the check valve moves gas from the hollow layer side to the outside air side so that a pressure difference between the hollow layer side and the outside air side is 10 kPa or less.

3. The check valve has a minimum operating differential pressure of 10 kPa or less at 25°C. The double glazing according to claim 1 or 2.

4. The hollow layer is filled with a rare gas. The double glazing according to claim 1 or 2.

5. The hollow layer is filled with air. The double glazing according to claim 1 or 2.

6. the spacer includes a desiccant; The double glazing according to claim 1 or 2.

7. the spacer is made of a thermoplastic resin composition having a JIS A hardness of 10 or more and 90 or less at 25°C; The thermoplastic resin composition is The adhesive sheet contains a butyl rubber, a crystalline polyolefin, a desiccant, and an inorganic filler, a proportion of the butyl rubber in a total amount of the butyl rubber and the crystalline polyolefin of 50% by weight or more and 98% by weight or less, and a proportion of the crystalline polyolefin in a total amount of the butyl rubber and the crystalline polyolefin of 2% by weight or more and 50% by weight or less, the ratio of the inorganic filler to a total of 100 parts by weight of the butyl rubber and the crystalline polyolefin is 200 parts by weight or less; The melt viscosity at 120°C is 0.6 kPa s or more and 7.0 kPa s or less, and The storage modulus at 25°C is 15 MPa or more and 60 MPa or less, The double glazing according to claim 1 or 2.

8. The check valve is provided at a corner portion where the spacer is bent. The double glazing according to claim 1 or 2.

9. The check valve is provided on a straight portion of the spacer. The double glazing according to claim 1 or 2.

10. the spacer includes a plurality of tubular members and a plurality of connecting members that connect the tubular members together; The check valve is provided in at least one of the plurality of joining members. The double glazing according to claim 1 or 2.

11. The check valve has a cylindrical shape and an outer diameter of a portion that penetrates the spacer is 1 mm or more and 16 mm or less. The double glazing according to claim 1 or 2.

12. a joint length between the portion of the check valve protruding toward the outside air side and the butyl-based seal member is 1 mm or more and 10 mm or less; The double glazing according to claim 1 or 2.

13. At least one of the two or more glass plates is laminated glass. The double glazing according to claim 1 or 2.

14. A high-altitude double-glazing unit comprising the double-glazing unit according to claim 1 or 2.

Images