JP2018177605A - Multi-layered glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-layered glass capable of ensuring excellent heat insulation property even though having good handling property and permitting weight saving.SOLUTION: A multi-layer glass 10 has a configuration that an interlayer 16 formed between two glass panes 12 and 13 is divided by an interlayer 18. The interlayer 18 is a film-shaped member using an organic compound having a thermal expansion coefficient equal to or lower than that of glass constituting the glass panes 12 and 13. For example, cellulose nanofiber is usable as the organic compound.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a multilayer glass in which two glass plates are partitioned by an intermediate film.

  The window can reduce the dissipation of heat by improving the thermal insulation of the window glass and can improve its thermal insulation performance. Therefore, double glazing having higher heat insulating performance than single-layer glass may be used as window glass.

  In general, the heat insulating performance of the window glass is proportional to the thickness of the intermediate layer (air layer) between the 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 insulation performance may be reduced. Therefore, for example, Patent Document 1 discloses a configuration in which an intermediate layer between two glass plates is partitioned by an intermediate film. In this configuration, by dividing the intermediate layer by the intermediate film, the width of each separated intermediate layer can be regulated within the convection limit, and high heat insulation performance can be obtained.

JP-A-59-35048

  In the configuration of Patent Document 1 described above, the intermediate film that divides the intermediate layer is made of a transparent resin film. Although a resin such as polyester is conventionally used for this transparent resin film, these resins have a coefficient of thermal expansion larger than that of glass. For this reason, when the temperature of the window glass rises due to the influence of solar radiation, heating and the like, the resin film expands more than the glass plate, and deformation such as sag or warpage occurs. As a result, the scene is distorted and the like, which makes it unsuitable as a window glass. On the other hand, it is also conceivable to constitute the intermediate film with a thin glass plate. However, thin glass plates have problems in that they are difficult to handle and are heavier in weight than resin films.

  The present invention has been made in consideration of the problems of the above-mentioned prior art, and it is an object of the present invention to provide a double-glazed glass which is excellent in handleability and can be reduced in weight while securing excellent thermal insulation performance. To aim.

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

  According to such a configuration, the amount of elongation of the intermediate film is smaller than the amount of elongation of the glass sheet, even when the temperature is increased and the glass sheet is stretched. As a result, since the interlayer is subjected to tension due to the elongation of the glass plate to prevent the occurrence of deflection and wrinkles, it can maintain excellent heat insulation performance and viewability. In addition, since the intermediate film is formed of a film-like member using an organic compound, it is easy to handle and can be reduced in weight as compared to, for example, the case where a thin glass plate is used for the intermediate film.

  In the multilayer glass according to the present invention, the organic compound may be cellulose nanofibers. That is, cellulose nanofibers have excellent properties of being lightweight and having high strength and having a thermal expansion coefficient smaller than that of glass. For this reason, by using cellulose nanofibers, the interlayer film can achieve excellent effects such as weight reduction, high strength, improved handleability, prevention of sag and wrinkles, and the like.

  In the multilayer glass according to the present invention, the intermediate film may be made of a composite material containing the cellulose nanofibers and a transparent resin. That is, since cellulose nanofibers are very thin, for example, when a thickness is desired, an intermediate film having a desired thickness can be formed by using a composite material of cellulose nanofibers and a transparent resin.

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

  In the multilayer glass according to the present invention, a first spacer member is provided between one glass plate and the intermediate film, and a second spacer member is provided between the other glass plate and the intermediate film. The intermediate film may be configured such that one side surface and the first spacer member, and the other side surface and the second spacer member are bonded by an adhesive. Then, in the multi-layer glass, the intermediate film which receives tension can be reliably held by the spacer member via the adhesive.

  In the multilayer glass 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 the first spacer member and the second spacer Between the two members, a position opposite to the intermediate layer side of the adhesive is sealed by a primary sealing material, and between the two glass plates, the first spacer member, The second spacer member and the position on the opposite side to the intermediate layer side of the primary sealing material may be sealed by the secondary sealing material. Then, the multi-layer glass can ensure the airtightness and water-tightness of the intermediate layer by the primary sealing material and the secondary sealing material while reliably supporting the intermediate film by the adhesive.

  In the multilayer glass according to the present invention, the first spacer member and the second spacer member may have a configuration in which a part of mutually facing side surfaces is fitted. Then, the spacer members have a substantially integral structure, so that the assemblability is improved, and the support rigidity against the tension of the intermediate film is also improved.

  In the multilayer glass according to the present invention, the first spacer member and the second spacer member face each other by having concave portions recessed in the direction in which parts of mutually opposing side surfaces are separated from each other. A pocket-shaped portion between the side surfaces, and provided at a position opposite to the intermediate layer side of the adhesive between the first spacer member and the second spacer member. The primary sealing material may be disposed in the pocket-shaped portion. Then, in the multi-layer glass, the amount of installation of the primary sealing material can be increased by the pocket-shaped portion, the sealing performance is improved, and the adhesiveness with the secondary sealing material is also improved.

  ADVANTAGE OF THE INVENTION According to this invention, the double-glazed glass which can ensure the heat insulation performance which was excellent in the handling property and which can be reduced in weight, but is excellent can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which showed typically the structure of the one edge part of the multilayer glass which concerns on one Embodiment of this invention. It is sectional drawing which showed typically the structure of the one edge part of the multilayer glass which concerns on a 1st modification. It is sectional drawing which showed typically the structure of the one edge part of the multilayer glass which concerns on a 2nd modification. It is sectional drawing which showed typically the structure of the one edge part of the multilayer glass which concerns on a 3rd modification.

  Hereinafter, preferred embodiments of the multilayer glass according to the present invention will be described in detail with reference to the attached drawings.

  FIG. 1: is sectional drawing which showed typically the structure of the one edge part of the multilayer glass 10 which concerns on one Embodiment of this invention. FIG. 1 illustrates the cross-sectional structure of one edge of the multi-layer glass 10 as a representative, but the multi-layer glass 10 has the same cross-sectional structure as the structure shown in FIG. Ru. The double glazing 10 of the present embodiment is a window glass that can be used for a fitting (window) installed at an opening of a building. As a fixture which can use the double glazing 10, for example, a sliding window such as a fitted window, a raising and lowering window, a sliding window, a rotary window such as a window, a door, etc. can be exemplified. The multi-layer glass 10 is supported by, for example, the fence or window frame of a shoji constituting these fixtures.

  First, the entire configuration of the multilayer glass 10 will be described.

  As shown in FIG. 1, in the multi-layer glass 10, the two glass plates 12 and 13 are disposed to face each other via the spacer members 14 and 15, and the intermediate layer 16 between the glass plates 12 and 13 is an intermediate film 18. It is a window glass of a partitioned structure, that is, a three-layer structure. In addition, in order to ensure the legibility of drawing, in FIG. 1, the hatching which shows the cross section of the glass plates 12 and 13, the spacer members 14 and 15, and the intermediate film 18 is abbreviate | omitted, and FIGS. .

  Each glass plate 12 and 13 is float glass, for example. Each of the glass plates 12 and 13 may be a netted glass, a heat-resistant tempered glass, a low-E glass (heat shield glass) or the like. The glass plates 12 and 13 may be made of different types of glass.

  Each spacer member 14 and 15 is a rod-shaped member formed, for example with aluminum or resin. Each spacer member 14 and 15 may have a hollow shape, and may be configured to accommodate a moisture absorbent or the like inside. One spacer member (first spacer member) 14 forms a predetermined space between one glass plate 12 and the intermediate film 18. The other spacer member (second spacer member) 15 forms a predetermined space between the other glass plate 13 and the intermediate film 18.

  Adhesives 20 bond the spacer members 14 and 15 to the intermediate film 18. That is, the outer peripheral edge of the intermediate 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 seal material 22, and the space between the other spacer member 15 and the glass plate 13 is sealed by the primary seal material 23. A position between the spacer members 14 and 15 and on the opposite side (outside) of the adhesive 20 from the intermediate layer 16 side (inner side) is sealed by a primary seal material 24.

  A secondary sealing material 26 is provided on the opposite side of the spacer members 14 and 15 and the primary sealing materials 22 to 24 from 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 a position between the glass plates 12 and 13 and on the outside of the spacer members 14 and 15 and the primary sealing materials 22 to 24.

  The intermediate film 18 divides the intermediate layer 16 into two intermediate layers 16 a and 16 b by partitioning the two glass plates 12 and 13. The intermediate film 18 is disposed at the center between the two glass plates 12 and 13. By providing the intermediate film 18 between the glass plates 12 and 13, the multilayer glass 10 prevents the occurrence of convection within the wide intermediate layer 16 while securing a sufficient distance between the glass plates 12 and 13. It is possible to obtain high thermal insulation performance. For example, in the multi-layer glass 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, thereby generating convection in the intermediate layers 16 a and 16 b. To prevent.

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

  First, the intermediate film 18 is formed of a transparent film-like member using an organic compound having a thermal expansion coefficient equal to or less than the thermal expansion coefficient of the glass forming each of the glass plates 12 and 13. The intermediate film 18 has a thermal expansion coefficient smaller than that of glass, so that even when the temperature of the multilayer glass 10 changes, tension always acts. That is, even when each of the glass plates 12 and 13 is stretched due to a temperature change, the amount of elongation of the intermediate film 18 is smaller than the amount of elongation of the glass plates 12 and 13. As a result, tension is applied to the intermediate film 18 to prevent the occurrence of slack or wrinkles in the intermediate film 18.

  In the present embodiment, a transparent film made of cellulose nanofibers is used as the organic compound forming the intermediate film 18. Cellulose nanofibers are the minimum structural units of plants and are materials obtained by physical and chemical disintegration. The diameter of cellulose nanofibers is several nanometers, which is sufficiently smaller than the wavelength of light. For this reason, cellulose nanofibers do not cause interference with light, and the film made from paper becomes transparent. Although the method of papermaking of cellulose nanofibers is not particularly limited, for example, a method in which a solution containing about 30% by weight of cellulose nanofibers is thinly spread and dried can be exemplified.

For example, the coefficient of thermal expansion of float glass used for general double glazing is 8.5 to 9.0 × 10 ⁻⁶ / ° C. at around room temperature. On the other hand, the coefficient of thermal expansion of a film made of 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 cellulose nanofibers are processed as the intermediate film 18 of the multilayer glass 10 at room temperature, tension is applied to the intermediate film 18 due to the difference in thermal expansion coefficient between the intermediate film 18 using cellulose nanofibers and the glass plates 12 and 13 at high temperatures. Occurs.

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

  Cellulose nanofibers are very thin fibers as described above, and the thickness of a single paper-made film is also very thin. Therefore, the intermediate film 18 can be formed to a desired thickness by using a composite material of cellulose nanofibers. This composite material can be molded as a film-like member, for example, by a method of impregnating and curing a resin on cellulose nanofibers molded into a mat or sheet. For example, an acrylic resin is preferable as the resin to be impregnated into the cellulose nanofibers. Acrylic resins can be easily synthesized from monomers and can be easily molded by casting. In addition, since a low viscosity monomer can be impregnated into cellulose nanofibers, a film-like member highly filled with cellulose nanofibers can be produced by conducting polymerization with heat after impregnation with a monomer containing a polymerization initiator. Thus, the intermediate film 18 is formed of a composite material containing cellulose nanofibers and an acrylic resin which is a transparent resin.

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

The coefficient of thermal expansion of the composite material using fibers changes depending on the coefficient of thermal expansion, elastic modulus, and addition amount of the fibers to be added, and can be set to a desired value by adjusting the addition amount. In the case of the present embodiment, the thermal expansion coefficient of the cellulose nanofibers is 0.17 × 10 ⁻⁶ / ° C., and the elastic modulus thereof is 130 to 150 GPa. Moreover, if an acryl is made into an example as transparent resin, the coefficient of thermal expansion will be 60 * 10 < ^-6 > / degreeC, and an elastic modulus will be 2.2-3.2 GPa. On the other hand, the coefficient of thermal expansion of the float glass is 8.5 to 9.0 × 10 ⁻⁶ / ° C., which is located in the middle between the coefficient of thermal expansion of the cellulose nanofibers and the acrylic. For this reason, it is also possible to make the thermal expansion coefficient of the intermediate film 18 approach or coincide with the thermal expansion coefficient of the float glass by adjusting the loading amount of the cellulose nanofibers. When the thermal expansion coefficients of the intermediate film 18 and the glass plates 12 and 13 coincide with each other, the amount of expansion due to the temperature change of the two coincide with each other, so that the load on the primary seal members 22 to 24 and the adhesive 20 is further reduced.

  Next, the primary seal members 22 to 24 are formed of, for example, butyl rubber (butyl seal). A butyl seal is effective as a sealing material because it has low permeability to gas and water vapor. However, butyl seal is highly fluid and is not suitable for shape retention. So, in the said multilayer glass 10, the secondary sealing material 26 is provided in the outer side (opposite to the intermediate layer 16 side) of the primary sealing materials 22-24, and each spacer member 14,15, each glass plate 12,13 And the shape retention of the intermediate film 18 is secured. 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 intermediate film 18 generates tension, the multilayer glass 10 needs a structure capable of supporting the tension. However, since the primary seal members 22 to 24 are fluid, they are not suitable for holding the intermediate film 18 accompanied by tension. Therefore, in the present embodiment, the tension of the intermediate film 18 can be maintained by joining the spacer members 14 and 15 and the intermediate film 18 with the adhesive 20. In this case, the stress generated between the spacer members 14 and 15 and the intermediate film 18 is shear stress. Therefore, the adhesive 20 is preferably a type having high hardness such as epoxy type, urethane type, cyanoacrylate type and the like.

  FIG. 2: is sectional drawing which showed typically the structure of one edge part of the multilayer glass 10A which concerns on a 1st modification.

  In the configuration example shown in FIG. 1, the primary seal material 24 is provided at a position on the outer side of the intermediate 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 in accordance with the thickness of the intermediate film 18. For this reason, the installation amount of the primary sealing material 24 is limited, and depending on the specification of the multilayer glass 10, the sealing performance of the primary sealing material 24 and the adhesiveness with the secondary sealing material 26 may be reduced. .

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

  Therefore, in the multi-layer glass 10A, the provision of the pocket-shaped portion 30 can increase the installation amount of the primary seal member 24, and the sealability is improved and the adhesiveness with the secondary seal member 26 is also improved. . Under the present circumstances, pocket shape part 30 has taper shape 30a where the opening by the side of secondary seal material 26 becomes wider than the adhesive agent 20 side. Thereby, in the multilayer glass 10A, the adhesiveness between the primary seal material 24 and the secondary seal material 26 is further improved.

  FIG. 3: is sectional drawing which showed typically the structure of the one edge part of the multilayer glass 10B which concerns on a 2nd modification.

  The multilayer glass 10B shown in FIG. 3 has a fitting portion 32 in which a part of the mutually facing side surfaces of the spacer members 14 and 15 is fitted. The fitting portion 32 is recessed in a direction in which the side surface of the other spacer member 15 is separated from the one spacer member 14 and the fitting convex portion 32 a in which the side surface of one spacer member 14 is protruded toward the other spacer member 15 side. And a recessed fitting recess 32b. The fitting portion 32 may have a configuration in which the fitting concave portion 32 b is provided on the spacer member 14 side and the fitting convex portion 32 a is provided on the spacer member 15 side. In the fitting structure of the fitting portion 32, in addition to the concavo-convex structure, for example, convex portions mutually offset in the inward and outward directions are provided on each of the opposing side surfaces of the respective spacer members 14 and 15 Or the like.

  In such a multilayer glass 10B, the spacer members 14 and 15 have a substantially integral structure, so that the assemblability is improved, and the support rigidity of the intermediate film 18 against tension is also improved.

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

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

  Therefore, the multilayer glass 10C prevents the occurrence of convection in the enlarged intermediate layer 16 while enlarging the distance between the two glass plates 12 and 13 as compared with the above-described multilayer glass 10, 10A, 10B. It is possible to obtain higher thermal insulation performance. That is, while the distance between the two glass plates 12 and 13 is 24 mm, for example, the distance between the intermediate layers 16a to 16d partitioned by the intermediate film 18 is 6 mm while the distance between the two glass plates 12 and 13 is 6 mm. It is possible to prevent the occurrence of convection inside. Moreover, in the multilayer glass 10C, the spacer members 14, 15, 34, 35 having the increased number of installation can be made substantially integral by the fitting portion 32, so that the assembling property is not lost. The multilayer glass 10C may have a structure without the fitting portion 32. In the configuration example shown in FIG. 4, three intermediate films 18 are provided, but two or four or more intermediate films 18 may be provided.

  As described above, the multilayer glass 10 or 10A to 10C according to the present embodiment has 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 intermediate film 18 is a film-like member using an organic compound having a thermal expansion coefficient less than that of the glass forming the glass plates 12 and 13.

  Therefore, even if the temperature is increased and the glass plates 12 and 13 are stretched, the amount of elongation of the intermediate film 18 is greater than the amount of elongation of the glass plates 12 and 13 in the multi-layer glass 10 or 10A to 10C. small. As a result, since the intermediate film 18 receives tension due to the elongation of the glass plates 12 and 13 to prevent the generation of deflection and wrinkles, it is possible to maintain excellent thermal insulation performance and viewability. In addition, since the intermediate film 18 is formed of a film-like member using an organic compound, it is easy to handle and can be reduced in weight as compared with, for example, the case where a thin glass plate is used for the intermediate film. For this reason, the increase in weight is minimal even in the configuration in which a plurality of interlayers 18 are provided as in the case of the multilayer glass 10C shown in FIG. 4 or when the size of the multilayer glass 10, 10A to 10C is large. It is limited.

  The intermediate film 18 may be composed of a composite material containing cellulose nanofibers and a transparent resin. That is, since cellulose nanofibers are very thin, for example, when a thickness is desired, an intermediate film 18 having a desired thickness can be formed by using a composite material of cellulose nanofibers and a transparent resin. In addition, 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 term "transparent resin" is a concept including not only a completely transparent one having a transmittance of 100% but also one having a considerably low transmittance as long as the opposite side can be visually recognized.

  The multi-layer glass 10, 10A, 10B is between the spacer member 14 and the 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 on the opposite side of the adhesive 20 from the intermediate layer 16 side is sealed by the primary seal members 22 to 24. Further, the position between the two glass plates 12 and 13 on the opposite side of the spacer member 14, the spacer member 15, and the primary seal member 22 to the intermediate layer 16 side is a secondary seal member. 26 are sealed. In the case of the multilayer glass 10C, each intermediate film 18 is a primary seal between the spacer members 14, 15, 34, 35 and on the opposite side of the adhesive 20 to the intermediate layer 16 side. It is sealed by the members 22 to 24 and the outside is sealed by the secondary seal member 26. Therefore, in the multi-layer glass 10, 10A to 10C, while the intermediate film 18 is reliably supported by the adhesive 20, the airtightness and water tightness of the intermediate layer 16 by the primary sealing materials 22 to 24 and the secondary sealing material 26. Can be secured.

  In addition, this invention is not limited to above-described embodiment, Of course, it can change freely in the range which does not deviate from the main point of this invention.

  In the above embodiment, the configuration using only two glass plates of the glass plates 12 and 13 is exemplified, but three or more glass plates are provided, and the intermediate film 18 is provided between the two glass plates facing each other. It is good also as composition.

  Reference Signs List 10, 10A to 10C double glazing, 12, 13 glass plate, 14, 15, 34, 35 spacer member, 14a, 15a concave portion, 16, 16a to 16d interlayer, 18 interlayer, 20 adhesive, 22 to 24 Primary seal material, 26 Secondary seal material, 30 pocket shape parts, 32 fitting parts

Claims (8)

A multi-layer glass in which an intermediate layer formed between two glass plates is partitioned by an intermediate film,
The interlayer glass is a film-like member using an organic compound having a thermal expansion coefficient equal to or less than the thermal expansion coefficient of the glass forming the glass plate. In the multilayer glass according to claim 1,
The multilayer glass is characterized in that the organic compound is cellulose nanofibers. In the multilayer glass according to claim 2,
The interlayer glass is composed of a composite material containing the cellulose nanofibers and a transparent resin. In the multilayer glass according to claim 3,
The multi-layer glass, wherein the transparent resin is an acrylic resin. In the multilayer glass according to any one of claims 1 to 4,
A first spacer member is provided between the one glass plate and the intermediate film,
A second spacer member is provided between the other glass plate and the intermediate film,
The interlayer glass is characterized in that one side surface and the first spacer member and the other side surface and the second spacer member are respectively bonded by an adhesive. In the multilayer glass according to claim 5,
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 adhesion The position opposite to the intermediate layer side of the agent is sealed by the primary seal material,
Between the two glass plates, the first spacer member, the second spacer member, and the position on the opposite side to the intermediate layer side of the primary seal member are sealed by the secondary seal member. Double layer glass characterized by In the multilayer glass according to claim 5 or 6,
A double glazing characterized in that in the first spacer member and the second spacer member, parts of mutually facing side surfaces are fitted. In the multilayer glass according to claim 6,
Each of the first spacer member and the second spacer member has a concave portion recessed in a direction in which parts of mutually opposing side surfaces are separated from each other, thereby forming a pocket-shaped portion between the mutually opposing side surfaces Yes,
The primary sealing material provided between the first spacer member and the second spacer member and on the opposite side of the adhesive to the intermediate layer is disposed in the pocket-shaped portion A double glazing characterized by being

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