JP6882920B2 - Double glazing - Google Patents

Description

The present invention relates to double glazing in which two glass plates are separated by an interlayer film.

By improving the heat insulating property of the window glass, the window can reduce heat dissipation and improve its heat insulating performance. Therefore, as the window glass, double glazing having higher heat insulating performance than single glazing may be used.

Generally, the heat insulating performance of a window glass is proportional to the thickness of an intermediate layer (air layer) between two glass plates. However, if the width of the intermediate layer exceeds a certain value (12 mm), convection occurs in the layer, and even if the width is further increased, the heat insulating performance may be deteriorated. Therefore, for example, Patent Document 1 discloses a configuration in which an intermediate layer between two glass plates is partitioned by an interlayer film. In this configuration, by partitioning the intermediate layer with an interlayer film, the width of each partitioned intermediate layer can be regulated within the convection limit, and high heat insulating performance can be obtained.

Japanese Unexamined Patent Publication No. 59-35048

In the configuration of Patent Document 1, the interlayer film that partitions the intermediate layer is made of a transparent resin film. Conventionally, a resin such as polyester has been used for this transparent resin film, but these resins have a larger coefficient of thermal expansion than glass. Therefore, when the temperature of the window glass rises due to the influence of sunlight, heating, or the like, the resin film expands more than the glass plate, causing deformation such as sagging or warping. As a result, the scenery is distorted and is not suitable as a window glass. On the other hand, it is also conceivable that the interlayer film is composed of a thin glass plate. However, a thin glass plate has a problem that it is difficult to handle and is heavier than a resin film.

The present invention has been made in consideration of the above-mentioned problems of the prior art, and provides a double glazing capable of ensuring excellent heat insulating performance while being easy to handle and being lightweight. The purpose.

The double glazing according to the present invention is a double glazing in which an intermediate layer formed between two glass plates is partitioned by an interlayer film, and the intermediate film is equal to or less than the coefficient of thermal expansion of the glass forming the glass plate. It is characterized in that it is a film-like member using an organic compound having a coefficient of thermal expansion.

According to such a configuration, in the double glazing, the elongation amount of the interlayer film is smaller than the elongation amount of the glass plate even when the temperature rises and the glass plate is elongated. As a result, the interlayer film is prevented from bending or wrinkling due to the tension caused by the elongation of the glass plate, so that excellent heat insulating performance and viewability can be maintained. Moreover, since the interlayer film is composed of a film-like member using an organic compound, the handling property is better and the weight can be reduced as compared with the case where a thin glass plate is used for the interlayer film, for example.

In the double glazing according to the present invention, the organic compound may be cellulose nanofibers. That is, cellulose nanofibers are lightweight and have high strength, and have excellent properties that the coefficient of thermal expansion is smaller than that of glass. Therefore, by using cellulose nanofibers for the interlayer film, excellent effects such as weight reduction, high strength, improvement in handleability, prevention of sagging and wrinkles can be obtained.

In the double glazing according to the present invention, the interlayer film may be composed of a composite material containing the cellulose nanofibers and a transparent resin. That is, since the cellulose nanofibers are extremely thin, for example, when a thickness is desired, an interlayer film having a desired thickness can be formed by using a composite material of the cellulose nanofibers and a transparent resin.

In the double glazing according to the present invention, the transparent resin may be an acrylic resin. That is, acrylic resins have many advantages in terms of characteristics such as manufacturability, transparency, and strength.

In the double glazing according to the present invention, a first spacer member is provided between one glass plate and the interlayer film, and a second spacer member is provided between the other glass plate and the interlayer film. The interlayer film may be provided so that one side surface and the first spacer member and the other side surface and the second spacer member are joined by an adhesive. Then, in the double glazing, the interlayer film that receives tension can be reliably held by the spacer member via the adhesive.

In the double glazing according to the present invention, between the first spacer member and the one glass plate, between the second spacer member and the other glass plate, and between the first spacer member and the second spacer. The position between the member and the side opposite to the intermediate layer side of the adhesive is sealed by the primary sealing material, and between the two glass plates, the first spacer member, the said. The second spacer member and the position of the primary sealing material opposite to the intermediate layer side may be sealed with the secondary sealing material. Then, the double glazing can secure the airtightness and watertightness of the intermediate layer by the primary sealing material and the secondary sealing material while surely supporting the interlayer film by the adhesive.

In the double glazing according to the present invention, the first spacer member and the second spacer member may have a structure in which a part of the side surfaces facing each other is fitted to each other. Then, since each spacer member has a substantially integrated structure, the assembling property is improved and the support rigidity against the tension of the interlayer film is also improved.

In the double glazing according to the present invention, the first spacer member and the second spacer member face each other by having concave portions recessed in a direction in which some of the side surfaces facing each other are recessed from each other. A pocket-shaped portion is formed between the side surfaces thereof, and is provided at a position between the first spacer member and the second spacer member, which is opposite to the intermediate layer side of the adhesive. The primary sealing material may be arranged in the pocket-shaped portion. Then, in the double glazing, the amount of the primary sealing material installed can be increased by the pocket-shaped portion, the sealing property thereof is improved, and the adhesiveness with the secondary sealing material is also improved.

According to the present invention, it is possible to obtain a double glazing that is easy to handle, can be reduced in weight, and can secure excellent heat insulating performance.

It is sectional drawing which shows typically the structure of one edge part of the double glazing which concerns on one Embodiment of this invention. It is sectional drawing which shows typically the structure of one edge part of the double glazing which concerns on 1st modification. It is sectional drawing which shows typically the structure of one edge part of the double glazing which concerns on 2nd modification. It is sectional drawing which shows typically the structure of one edge part of the double glazing which concerns on 3rd modification.

Hereinafter, preferred embodiments of the double glazing according to the present invention will be given and will be described in detail with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view schematically showing the structure of one edge of the double glazing 10 according to the embodiment of the present invention. FIG. 1 typically illustrates the cross-sectional structure of one edge of the double glazing 10, but the double glazing 10 has, for example, all four circumferences of a rectangular shape having the same cross-sectional structure as the structure shown in FIG. To. The double glazing 10 of the present embodiment is a window glass that can be used as a fitting (window) installed at an opening of a building. Examples of fittings that can use the double glazing 10 include sliding windows such as fitting windows, raising and lowering windows, sliding windows, rotating windows such as hinged windows, and doors. The double glazing 10 is supported by, for example, a shoji stile or a window frame constituting these fittings.

First, the overall configuration of the double glazing 10 will be described.

As shown in FIG. 1, in the double glazing 10, two glass plates 12 and 13 are arranged facing each other via spacer members 14 and 15, and an intermediate layer 16 between the glass plates 12 and 13 is formed by an interlayer film 18. It is a partitioned structure, that is, a window glass having a three-layer structure. In order to ensure the legibility of the drawings, hatching showing the cross sections of the glass plates 12, 13, the spacer members 14, 15, and the interlayer film 18 is omitted in FIG. 1, and the same applies to FIGS. 2 to 4. ..

Each of the glass plates 12 and 13 is, for example, float glass. The glass plates 12 and 13 may be wire-reinforced glass, heat-resistant tempered glass, Low-E glass (heat-shielding glass), or the like. The glass plates 12 and 13 may be made of different types of glass.

The spacer members 14 and 15 are rod-shaped members made of, for example, aluminum or resin. Each of the spacer members 14 and 15 may have a hollow shape and may have a structure in which a hygroscopic agent or the like is housed therein. One spacer member (first spacer member) 14 forms a predetermined distance between the one glass plate 12 and the interlayer film 18. The other spacer member (second spacer member) 15 forms a predetermined distance between the other glass plate 13 and the interlayer film 18.

The spacer members 14 and 15 and the interlayer film 18 are joined by an adhesive 20. That is, the outer peripheral edge of the interlayer film 18 is firmly fixed by the adhesive 20 between the spacer members 14 and 15. The space between one spacer member 14 and the glass plate 12 is sealed by the primary sealing material 22, and the space between the other spacer member 15 and the glass plate 13 is sealed by the primary sealing material 23. The position between the spacer members 14 and 15 that is opposite to the intermediate layer 16 side (inside) of the adhesive 20 (outside) is sealed by the primary sealing material 24.

A secondary sealing material 26 is provided on the side of each of the spacer members 14 and 15 and each of the primary sealing materials 22 to 24 opposite to the intermediate layer 16 side. The secondary sealing material 26 is provided between the glass plates 12 and 13. That is, the secondary sealing material 26 seals the positions between the glass plates 12 and 13 and outside the spacer members 14 and 15 and the primary sealing materials 22 to 24, respectively.

The interlayer film 18 divides the intermediate layer 16 into two intermediate layers 16a and 16b by partitioning the two glass plates 12 and 13. The interlayer film 18 is arranged at the center between the two glass plates 12 and 13. In the double glazing 10, the interlayer film 18 is provided between the glass plates 12 and 13, so that the distance between the glass plates 12 and 13 is sufficiently secured and the occurrence of convection in the wide intermediate layer 16 is prevented. It is possible to obtain high heat insulation performance. For example, in the double glazing 10, the distance between the two glass plates 12 and 13 is 12 mm, and the distance between the intermediate layers 16a and 16b is 6 mm, respectively, whereby convection occurs in the intermediate layers 16a and 16b. Is being prevented.

Next, a specific configuration example of each element constituting the double glazing 10 will be described.

First, the interlayer film 18 is composed of a transparent film-like member using an organic compound having a coefficient of thermal expansion equal to or lower than the coefficient of thermal expansion of the glass forming the glass plates 12 and 13. Since the interlayer film 18 has a coefficient of thermal expansion smaller than that of glass, the interlayer film 18 has a structure in which tension always acts even when the temperature of the double glazing 10 changes. That is, even when the glass plates 12 and 13 are stretched due to the temperature change, the stretch amount of the interlayer film 18 is smaller than the stretch amount of the glass plates 12 and 13. As a result, tension is applied to the interlayer film 18, and the occurrence of sagging and wrinkles in the interlayer film 18 is prevented.

In this embodiment, a transparent film made by making cellulose nanofibers is used as the organic compound forming the interlayer film 18. Cellulose nanofibers are the smallest building blocks and are materials obtained by physical and chemical crushing. Cellulose nanofibers have a diameter of a few nanometers, well below the wavelength of light. Therefore, the cellulose nanofibers do not interfere with light, and the film made from the paper is transparent. The method for making paper from cellulose nanofibers is not particularly limited, and examples thereof include a method in which a solution containing about 30% by weight of cellulose nanofibers is thinly spread and dried to make paper.

For example, the coefficient of thermal expansion of float glass used for general double glazing is 8.5-9.0 × ^10-6 / ° C near room temperature. On the other hand, the coefficient of thermal expansion of the film made by making cellulose nanofibers is 0.17 × 10 ^-6 / ° C. near room temperature, which is smaller than the coefficient of thermal expansion of float glass. Therefore, when the cellulose nanofibers are processed as the interlayer film 18 of the double glazing 10 at room temperature, the interlayer film 18 is tensioned by the difference in the coefficient of thermal expansion between the interlayer film 18 using the cellulose nanofibers and the glass plates 12 and 13 at high temperature. Occurs.

The coefficient of thermal expansion of the resin generally used for the conventional interlayer film is, for example, 20 × 10 ^{−6 / ° C. for polyester, 60 × 10 −6} / ° C. for acrylic, and ^{70 × 10 −} ° C. for polyvinyl chloride. ^The coefficient of thermal expansion is 6 / ° C, which is an order of magnitude larger than the coefficient of thermal expansion of float glass.

Cellulose nanofibers are very fine fibers as described above, and the thickness of the film made by itself is also very thin. Therefore, the interlayer film 18 can be formed into a desired thickness by using a composite material of cellulose nanofibers. This composite material can be molded as a film-like member by, for example, a method in which a resin is impregnated into cellulose nanofibers molded into a mat-like or sheet-like shape and cured. As the resin to be impregnated into the cellulose nanofibers, for example, an acrylic resin is preferable. Acrylic resins can be easily synthesized from monomers and can be easily molded by casting. Further, since the low-viscosity monomer can be impregnated into the cellulose nanofibers, a film-like member highly filled with the cellulose nanofibers can be produced by impregnating the monomer containing the polymerization initiator and then carrying out the polymerization by heat. As a result, the interlayer film 18 is formed of a composite material containing cellulose nanofibers and an acrylic resin which is a transparent resin.

In this case, the acrylic monomer is based on acrylic acid, methacrylic acid, acrylic acid esters having different molecular weights such as methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, etc., which are ester compounds thereof, and methacrylic acid. There are methyl methacrylate (having a methacrylic acid group), ethyl methacrylate, butyl methacrylate, and 2-ethylhexyl methacrylate. Polymerization initiators include dihalogens, azo compounds, and polymerization initiators based on organic peroxides. By adding these and heating, a transparent composite material by polymerization can be easily obtained. It is also possible to carry out photocurable polymerization by adding an acetophenone-type photocuring initiator, a 4,4'-bis (dimethylamino) benzophenone-type photocuring initiator, and further a sensitizer.

The coefficient of thermal expansion of the composite material using fibers varies depending on the coefficient of thermal expansion and elastic modulus of the fibers to be added, and the amount of addition, and the desired value can be obtained by adjusting the amount of addition. In the case of this embodiment, the coefficient of thermal expansion of the cellulose nanofibers is 0.17 × 10 ⁻⁶ / ° C., and the elastic modulus thereof is 130 to 150 GPa. Taking acrylic as a transparent resin as an example, its coefficient of thermal expansion is 60 × 10 ^-6 / ° C., and its elastic modulus is 2.2 to 3.2 GPa. On the other hand, the coefficient of thermal expansion of float glass is 8.5-9.0 × 10 ^-6 / ° C., which is located between the coefficient of thermal expansion of cellulose nanofibers and acrylic. Therefore, it is also possible to adjust the filling amount of the cellulose nanofibers so that the coefficient of thermal expansion of the interlayer film 18 approaches or matches the coefficient of thermal expansion of the float glass. When the coefficients of thermal expansion of the interlayer film 18 and the glass plates 12 and 13 match, the amount of elongation due to the temperature change of both matches, so that the load on the primary sealing materials 22 to 24, the adhesive 20 and the like is further reduced.

Next, the primary sealing materials 22 to 24 are formed of, for example, butyl rubber (butyl seal). Butyl seal is effective as a sealing material because it has low permeability of gas and water vapor. However, butyl seal has high fluidity and is not suitable for maintaining its shape. Therefore, in the double glazing 10, the secondary sealing material 26 is provided on the outside of the primary sealing materials 22 to 24 (the side opposite to the intermediate layer 16 side), and the spacer members 14, 15 and the glass plates 12, 13 are provided. And the shape retention of the interlayer film 18 is guaranteed. The secondary sealing material 26 is formed of, for example, a silicone-based sealing material or a polysulfide-based sealing material.

As described above, since the interlayer film 18 generates tension, the double glazing 10 needs to have a structure capable of supporting this tension. However, since the primary sealing materials 22 to 24 are fluid, they are not suitable for holding the interlayer film 18 with tension. Therefore, in the present embodiment, the tension of the interlayer film 18 can be maintained by joining the spacer members 14, 15 and the interlayer film 18 with the adhesive 20. In this case, the stress generated between the spacer members 14 and 15 and the interlayer film 18 is a shear stress. Therefore, the adhesive 20 is preferably of a type having high hardness such as epoxy-based, urethane-based, and cyanoacrylate-based.

FIG. 2 is a cross-sectional view schematically showing the structure of one edge of the double glazing 10A according to the first modification.

In the configuration example shown in FIG. 1, the primary sealing material 24 is provided at a position outside the interlayer film 18 (adhesive 20) between the spacer members 14 and 15. That is, the space between the spacer members 14 and 15 has a narrow structure that matches the thickness of the interlayer film 18. Therefore, the installation amount of the primary sealing material 24 is limited, and depending on the specifications of the double glazing 10, the sealing property of the primary sealing material 24 and the adhesiveness with the secondary sealing material 26 may deteriorate. ..

Therefore, the double glazing 10A shown in FIG. 2 has a configuration in which a pocket-shaped portion 30 is formed between the spacer members 14 and 15, and a primary sealing material 24 is arranged in the pocket-shaped portion 30. The pocket-shaped portion 30 is formed by concave portions 14a and 15a provided on the side surfaces of the spacer members 14 and 15 facing each other, respectively. The concave portion 14a of the spacer member 14 has a shape recessed in a direction away from the opposing spacer member 15 at a position outside the adhesive 20. The concave portion 15a of the spacer member 15 has a shape recessed in a direction away from the opposing spacer member 14 at a position outside the adhesive 20.

Therefore, in the double glazing 10A, the installation amount of the primary sealing material 24 can be increased by providing the pocket-shaped portion 30, the sealing property thereof is improved, and the adhesiveness with the secondary sealing material 26 is also improved. .. At this time, the pocket-shaped portion 30 has a tapered shape 30a in which the opening on the secondary sealing material 26 side is wider than that on the adhesive 20 side. As a result, the double glazing 10A further improves the adhesiveness between the primary sealing material 24 and the secondary sealing material 26.

FIG. 3 is a cross-sectional view schematically showing the structure of one edge of the double glazing 10B according to the second modification.

The double glazing 10B shown in FIG. 3 has a fitting portion 32 in which a part of the side surfaces of the spacer members 14 and 15 facing each other are fitted to each other. The fitting portion 32 is recessed in a direction in which the side surface of one spacer member 14 is projected toward the other spacer member 15 and the side surface of the other spacer member 15 is separated from the one spacer member 14. It has a fitting recess 32b. The fitting portion 32 may have a configuration in which a fitting recess 32b is provided on the spacer member 14 side and a fitting convex portion 32a is provided on the spacer member 15 side. The fitting structure of the fitting portion 32 is other than the concave-convex structure. For example, on each of the opposing side surfaces of the spacer members 14 and 15, convex portions displaced in the inward and outward directions are provided, and the convex portions are locked to each other. It may have a structure or the like.

In such a double glazing 10B, since the spacer members 14 and 15 have a substantially integrated structure, the assembling property is improved and the support rigidity of the interlayer film 18 with respect to the tension is also improved.

FIG. 4 is a cross-sectional view schematically showing the structure of one edge of the double glazing 10C according to the third modification.

The double glazing 10C shown in FIG. 4 has a structure in which the intermediate film 18 of the double glazing 10B shown in FIG. 3 is increased to a plurality of sheets. In the double glazing 10C, the intermediate layer 16 is divided into four intermediate layers 16a, 16b, 16c, and 16d by installing three intermediate films 18 between the two glass plates 12 and 13 at equal intervals. There is. In the double glazing 10C, spacer members 14 and 15 are provided between the glass plates 12 and 13 and the interlayer films 18 adjacent to each other, and spacer members 34 and 35 are further provided between the interlayer films 18. Each interlayer film 18 is bonded to the spacer members 14, 15, 34, 35 on both sides by an adhesive 20, and a primary sealing material 24 is provided on the outside of the adhesive 20. Further, in the double glazing 10C, the spacer members 14, 34, the spacer members 34, 35, and the spacer members 15, 35 are fitted by the fitting portion 32, respectively.

Therefore, the double glazing 10C prevents the occurrence of convection in the enlarged intermediate layer 16 while increasing the distance between the two glass plates 12 and 13 as compared with the above-mentioned double glazings 10, 10A and 10B. It is possible to obtain higher heat insulation performance. That is, in the double glazing 10C, for example, while the distance between the two glass plates 12 and 13 is 24 mm, the distance between the intermediate layers 16a to 16d partitioned by the interlayer film 18 is 6 mm, and the distance between the intermediate layers 16a to 16d is 6 mm. It is possible to prevent the occurrence of convection inside. Moreover, in the double glazing 10C, the spacer members 14, 15, 34, and 35, which have been installed more frequently, can be formed into a substantially integrated structure by the fitting portion 32, so that the assembling property is not impaired. The double glazing 10C may have a structure that does not have the fitting portion 32. In the configuration example shown in FIG. 4, three interlayer films 18 are provided, but the interlayer film 18 may be two or four or more.

As described above, the double glazings 10, 10A to 10C according to the present embodiment have a configuration in which the intermediate layer 16 formed between the two glass plates 12 and 13 is partitioned by the intermediate film 18. The interlayer film 18 is a film-like member using an organic compound having a coefficient of thermal expansion equal to or lower than the coefficient of thermal expansion of the glass forming the glass plates 12 and 13.

Therefore, in the double glazings 10, 10A to 10C, the elongation amount of the interlayer film 18 is larger than the elongation amount of the glass plates 12, 13 even when the temperature rises and the glass plates 12, 13 are elongated. small. As a result, the interlayer film 18 is prevented from bending or wrinkling due to the tension caused by the elongation of the glass plates 12 and 13, so that excellent heat insulating performance and viewability can be maintained. Moreover, since the interlayer film 18 is composed of a film-like member using an organic compound, the handling property is better and the weight can be reduced as compared with the case where a thin glass plate is used for the interlayer film, for example. Therefore, even when a plurality of interlayer films 18 are installed as in the double glazing 10C shown in FIG. 4 or when the size of the double glazings 10, 10A to 10C is large, the increase in weight is minimal. It becomes a limit.

The interlayer film 18 may be made of a composite material containing cellulose nanofibers and a transparent resin. That is, since the cellulose nanofibers are extremely thin, for example, when a thickness is desired, an interlayer film 18 having a desired thickness can be formed by using a composite material of the cellulose nanofibers and a transparent resin. When this transparent resin is an acrylic resin, it has many advantages in terms of characteristics such as manufacturability, transparency, and strength. In this case, the transparent resin is a concept that includes not only a completely transparent resin having a transmittance of 100% but also a resin having a considerably low transmittance if the opposite side is visible.

The double glazings 10, 10A and 10B are between the spacer member 14 and one glass plate 12, between the spacer member 15 and the other glass plate 13, and between the spacer member 14 and the spacer member 15. The position of the adhesive 20 opposite to the intermediate layer 16 side is sealed with the primary sealing materials 22 to 24. Further, the position between the two glass plates 12 and 13 opposite to the intermediate layer 16 side of the spacer member 14, the spacer member 15, and the primary sealing materials 22 to 24 is the secondary sealing material. It is sealed by 26. In the case of the double glazing 10C, the position of each interlayer film 18 between the spacer members 14, 15, 34, 35 and opposite to the intermediate layer 16 side of the adhesive 20 is the primary seal. It is sealed with materials 22 to 24, and the outside thereof is sealed with a secondary sealing material 26. Therefore, in the double glazings 10, 10A to 10C, the intermediate layer 16 is surely supported by the adhesive 20, and the intermediate layer 16 is airtight and watertight by the primary sealing materials 22 to 24 and the secondary sealing material 26. Can be secured.

It should be noted that the present invention is not limited to the above-described embodiment, and of course, it can be freely changed without departing from the gist of the present invention.

In the above embodiment, the configuration using only two glass plates 12 and 13 is illustrated, but the number of glass plates is three or more, and an interlayer film 18 is provided between the two glass plates facing each other. It may be configured as a glass.

10,10A-10C double glazing, 12,13 glass plate, 14,15,34,35 spacer member, 14a, 15a concave part, 16,16a-16d intermediate layer, 18 interlayer film, 20 adhesive, 22-24 Primary sealing material, 26 Secondary sealing material, 30 pocket shape part, 32 fitting part

Claims (8)

It is a double glazing in which an intermediate layer formed between two glass plates is partitioned by an interlayer film.
The intermediate film, Ri film member Der using an organic compound having a thermal expansion coefficient less thermal expansion of the glass forming the glass plate,
The organic compound is, double glazing, characterized in cellulose nanofibers der Rukoto. In the double glazing according to claim 1.
The interlayer glass is a double glazing characterized by being composed of a composite material containing the cellulose nanofibers and a transparent resin. In the double glazing according to claim 2.
The transparent resin is a double glazing characterized by being an acrylic resin. In the double glazing according to any one of claims 1 to 3.
A first spacer member is provided between one glass plate and the interlayer film.
A second spacer member is provided between the other glass plate and the interlayer film.
The interlayer glass is a double glazing characterized in that one side surface and the first spacer member and the other side surface and the second spacer member are bonded by an adhesive, respectively. It is a double glazing in which an intermediate layer formed between two glass plates is partitioned by an interlayer film.
The interlayer film is a film-like member using an organic compound having a coefficient of thermal expansion equal to or lower than the coefficient of thermal expansion of the glass forming the glass plate.
A first spacer member is provided between one glass plate and the interlayer film.
A second spacer member is provided between the other glass plate and the interlayer film.
The interlayer glass is a double glazing characterized in that one side surface and the first spacer member and the other side surface and the second spacer member are bonded by an adhesive, respectively. In the double glazing according to claim 4 or 5.
Adhesion between the first spacer member and the one glass plate, between the second spacer member and the other glass plate, and between the first spacer member and the second spacer member. The position of the agent opposite to the intermediate layer side is sealed with the primary sealing material.
The position between the two glass plates, which is opposite to the intermediate layer side of the first spacer member, the second spacer member, and the primary sealing material, is sealed by the secondary sealing material. Double glazing characterized by being In the double glazing according to any one of claims 4 to 6.
The first spacer member and the second spacer member are double glazing characterized in that a part of side surfaces facing each other is fitted to each other. In the double glazing according to claim 6.
The first spacer member and the second spacer member each have a concave portion recessed in a direction in which a part of the side surfaces facing each other is recessed from each other, thereby forming a pocket-shaped portion between the side surfaces facing each other. And
The primary sealing material provided between the first spacer member and the second spacer member at a position opposite to the intermediate layer side of the adhesive is arranged in the pocket-shaped portion. Double glazing characterized by being made.

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