JPH09328338A - Multiple glass and spacer used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively and simply obtain laminated glass excellent in moistureproof performance by using a specific composite multilayer film as a moistureproof layer introduced on the outside of a spacer made of a resin. SOLUTION: This multiple glass is obtained by opposing two or more sheets of glass plates 1a and 1b at a prescribed interval through a spacer 1c on the peripheral part of two or more sheets of glass and the spacer 1c comprises an inner layer 2 comprising a thermoplastic resin containing a hygroscopic material and a moistureproof layer 3 comprising a composite multilayer film laminated on outer peripheral side of the inside layer and the composite multilayer film contains one or more layer structures obtained by laminating heat-resistant thermoplastic resin layers on both side faces of a vinylidene chloride-based resin layer. In the multiple glass, the spacer 1 has preferably further a layer composed of a thermosetting or thermoplastic resin. Steam permeability of the thermoplastic resin constituting the inside layer is preferably <=0.1g/(m<2> /day) under 95% relative humidity at 25 deg.C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double glazing using a specific laminate as a spacer and a spacer used for the double glazing.

[0002]

2. Description of the Related Art In a multi-layer glass, at least two glass plates are opposed to each other through a spacer, and the glass plate and the spacer are adhered to each other with a butyl sealant to shield the hollow layer from the outside air, and then opposed to each other. The space formed by the inner surface of the glass plate and the outer periphery of the spacer is sealed with a room temperature curing type sealing material typified by polysulfide or silicone.

Usually, the spacer is hollow and made of aluminum, and is cut beforehand according to the size of the glass plate. After filling the hollow portion with a desiccant, each end is connected by a corner key to form a frame body. The one assembled into the above is used, or after the hollow part is filled with the desiccant, the corner parts are bent, and the end parts are joined with the connection key to be assembled into the frame body.

In this case, in addition to the pairing step, many complicated steps such as cutting the spacer, filling the desiccant, and assembling the spacer are required, which requires a lot of manpower. In addition, aluminum is often used for the spacer, but the part where the aluminum spacer and the glass plate are in contact is the heat conduction point,
There is also a problem that the heat insulating property of the double glazing is deteriorated.

In order to solve these problems, it has been proposed to use a resin spacer made of a flexible butyl rubber in the form of a string containing a desiccant. By using the resin spacers in this manner, the assembly work process can be simplified, and further the deterioration of the heat insulating property of the double glazing can be reduced.

[0006]

This resin spacer is insufficient in terms of moisture resistance. Therefore, in order to secure sufficient moistureproof performance, it is necessary to newly introduce a moistureproof layer outside the flexible butyl rubber spacer. As the moisture-proof layer, a low moisture-permeable thermoplastic resin such as polyisobutylene, a metal film such as aluminum, a low moisture-permeable resin film such as vinylidene chloride resin, a laminated film in which a metal layer is coated on a resin film, etc. have been proposed. There is.

However, in both cases, if the film thickness is made thin in order to ensure the bending followability at the edges and corners of the double glazing, sufficient strength cannot be obtained, so that the film may break during molding or the film itself. However, there is a problem that the moisture-proof property is deteriorated due to the insufficient moisture-proof property. On the contrary, in order to secure sufficient moistureproof performance, it is necessary to increase the film thickness of the film, which makes bending of the edges and corners of the double glazing difficult. That is, it was difficult to achieve both moldability and moisture resistance by adjusting the film thickness.

Among the above-mentioned films, the vinylidene chloride resin film has a good bending followability as compared with a metal film and is particularly excellent in moisture resistance among organic materials.

Further, it is less expensive than a laminated film obtained by coating a metal layer on a metal film or a resin film. Therefore, among the above-mentioned films, although it is not sufficient in the required performance, it has been proposed as a means for achieving both moldability and moisture resistance.

However, since the vinylidene chloride resin film has a low strength in itself, film breakage occurs during molding, and when used as a moisture-proof layer, the excellent moisture-proof performance inherent to the vinylidene chloride resin film cannot be obtained. .
Furthermore, since vinylidene chloride resin film has low heat resistance of vinylidene chloride resin, when it is laminated on the vinylidene chloride resin film of the moisture-proof layer as the outer layer in the manufacturing process of double glazing, The vinylidene-based resin is thermally decomposed, and sufficient moistureproof performance cannot be obtained as a moistureproof layer. Therefore, even when any of the above moisture-proof materials is used as the moisture-proof layer, a spacer satisfying good moldability and sufficient moisture-proof performance cannot be obtained.

The object of the present invention is to solve the problems of the prior art in the production of double glazing by using a specific composite multi-layer film having sufficient strength and moisture proof performance as a moisture proof layer even with a film thickness satisfying the bendability. It is intended to solve the problems and provide a double-layer glass plate excellent in moisture-proof performance at low cost and easily.

[0012]

DISCLOSURE OF THE INVENTION The present invention is a multi-layer glass in which two or more glass plates are opposed to each other at predetermined intervals via spacers at their peripheral portions so that a hollow layer is formed. The spacer comprises an inner layer made of a thermoplastic resin containing a hygroscopic material and a moistureproof layer made of a composite multilayer film laminated on the outer peripheral side of the inner layer, and the composite multilayer film is a vinylidene chloride-based material. Provided is a double glazing comprising one or more layer structures in which heat-resistant thermoplastic resin layers are laminated on both sides of a resin layer.

Further, the present invention is a spacer which is provided on the peripheral portion of a double-glazing unit composed of two or more glass plates and which opposes the two or more glass plates so as to form a hollow layer. The spacer has a structure in which a moisture-proof layer made of a composite multilayer film is laminated on the outside of an inner layer made of a thermoplastic resin containing a hygroscopic material, and the composite multilayer film is provided on both sides of the vinylidene chloride resin layer. Provided is a spacer for double-layer glass, which comprises one or more layer structures in which heat-resistant thermoplastic resin layers are laminated.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below with reference to the drawings. 1 and 2 are cross-sectional views showing an example of the double glazing of the present invention. In FIG.
The multi-layer glass 1 is held so that two glass plates 1a and 1b are opposed to each other at a predetermined interval via a spacer 1c at a peripheral edge portion on the opposite surface side thereof so that a hollow layer 1d is formed therebetween. It becomes. The spacer 1c includes an inner layer 2 made of a thermoplastic resin containing a hygroscopic material and a moisture-proof layer 3 made of a composite multilayer film laminated on the outer peripheral side thereof. Here, the outer peripheral side refers to the side toward the end surface with respect to the center side with respect to the surface direction of the glass plate. That is, the inner layer 2 is arranged closer to the hollow layer than the moisture-proof layer 3.

The double glazing glass of the structural example of FIG. 2 is, as in the double glazing shown in FIG. 1, facing two glass plates 1a and 1b so that a hollow layer 1d is formed therebetween. It is held so as to face the peripheral portion on the surface side with a spacer 1c therebetween at a predetermined interval. The spacer 1c in this configuration example includes an inner layer 2 made of a thermoplastic resin containing a hygroscopic material, a moisture barrier layer 3 made of a composite multilayer film, and an outer layer 4 made of a thermosetting resin or a thermoplastic resin in this order from the inner peripheral side. It is made by stacking.

The spacer is a laminated body composed of layers each having a function of keeping a predetermined gap between the glass plates of the double glazing facing each other, a sealing function of sealing a gas and sealing a peripheral edge portion, and a moisture permeation resistant function. is there. The functions or required characteristics of each layer constituting this laminated body are as follows.

The characteristics required of the inner layer 2 made of a thermoplastic resin containing a moisture absorbing material are firstly the glass plates 1a and 1b.
Absorbs the moisture of the hollow layer 1d constituted by the surface facing the and the inner layer 2, and passes through the outer layer 4, the moisture-proof layer 3, and the interface between the glass plates 1a, 1b and the moisture-proof layer 3. It has the property of absorbing the invading water and blocking the permeation of the water into the hollow layer. Secondly, it has adhesiveness with the glass plate and can follow the volume change of the hollow layer of the double glazing due to the change of use environment.

Therefore, as the thermoplastic resin forming the inner layer, a flexible polymer having high hygroscopicity and low moisture permeability and having appropriate hardness and elongation may be used alone or in such a weight. A polymer compound in which a compounding agent such as a filler, a reinforcing agent, a plasticizer, an adhesiveness-imparting agent or a process oil is added to the coalescence is used.

The water vapor permeability required for the thermoplastic resin for forming the inner layer is 0. 25 under a relative humidity condition of [25 ° C., 95%].
1 g · cm / (m ² · day) or less is preferable, and 0.0
It is particularly preferably 1 g · cm / (m ² · day) or less.
When the water vapor permeability exceeds 0.1 g · cm / (m ² · day), the moisture-proof layer 3 or the glass plates 1a and 1b and the moisture-proof layer 3 are used.
The moisture that has passed through the interface of the glass cannot be completely shielded, causing early generation of dew condensation on the inner surface of the hollow layer of the double-layer glass.

The unit of water vapor permeability is usually g / (m
² · day) is used here, but in order to express water vapor permeability as an inherent property of the resin, it is used as a unit of g · cm / (m ² · day) multiplied by the thickness for convenience. The water vapor permeability is measured by the method specified in JIS K7129.

As the thermoplastic resin for forming the inner layer 2 having these characteristics, basically any flexible thermoplastic resin satisfying the above characteristics can be used. Of these, isobutylene, butyl rubber mainly containing isobutylene, and butyl rubber such as brominated butyl rubber are particularly suitable.

As the hygroscopic material for forming the inner layer 2, for example, zeolite, alumina, silica gel or the like which is usually used for double glazing is used.

The outer layer 4 is required to have a function of keeping the distance between the opposing glass plates constant and capable of following the volume change of the hollow layer of the double glazing due to the change of use environment. As the resin forming this layer, a thermosetting resin or a thermoplastic resin having appropriate hardness, strength and elongation may be used alone, or a filler, a reinforcing agent, a plasticizer, an adhesiveness imparting agent or A compound to which a compounding agent such as process oil is added is used.

It is preferable that these thermosetting resins or thermoplastic resins and their compounds have adhesiveness with facing glass plates, but in some cases, even if they exhibit adhesiveness with glass via a primer. Good. As the primer, a silane coupling agent, a urethane resin-based adhesive, a polyester resin-based adhesive, etc. are preferable.
The adhesive strength is not particularly limited as long as the necessary adhesive strength can be obtained.

As the resin for forming the outer layer 4 having these characteristics, basically any thermoplastic resin material satisfying the above characteristics can be used. Specifically, acrylic resin, polyamide resin, polyester resin, silicone resin, urethane resin, epoxy resin, thiochol resin, olefin resin, halogenated olefin resin,
Vinyl chloride resins, vinylidene chloride resins and the like can be used, and their modified products, copolymers, mixtures and polymer alloys can also be used.

As the thermoplastic resin, a vinyl chloride resin such as a vinyl chloride homopolymer resin or a copolymer resin mainly composed of vinyl chloride with other monomers, and a plasticized product thereof,
Urethane resins such as polyurethane are preferably used.

FIG. 3 is a schematic sectional view showing an example of the composite multilayer film of the present invention. The composite multilayer film used for the moisture-proof layer 3 has a thermoplastic resin layer (A) having heat resistance on both sides of the vinylidene chloride resin layer (B),
(A ') is a film containing one or more layer structures laminated via an adhesive. Further, it has a moisture-proof function of preventing moisture from entering the hollow layer 1d from the outside of the double glazing, and adheres to the glass plate by following the volume change of the hollow layer of the double glazing due to the change of the use environment. It also has a function to secure it. Further, this multilayer film has sufficient heat resistance and the like that does not cause deterioration of the moisture-proof performance due to thermal decomposition or the like when a molten thermoplastic resin is laminated on the outer peripheral side of the multilayer film.

As the vinylidene chloride resin forming the moisture-proof layer 3, a vinylidene chloride homopolymer or a copolymer of vinylidene chloride and another monomer can be used. As the monomer used for the vinylidene chloride copolymer, various acrylates such as vinyl chloride, vinyl acetate, crotonic acid, acrylic acid, methyl acrylate, ethyl acrylate, propyl acrylate, isopropyl acrylate, tert-butyl acrylate, pentyl acrylate and hexyl acrylate. , Acrylonitrile, methacrylonitrile, methacrylic acid, each methacrylate corresponding to the acrylate, and the like.

Workability during molding of vinylidene chloride resin layer,
From the viewpoint of moisture resistance of the vinylidene chloride resin layer itself, it is preferable to use a copolymer such as a vinylidene chloride-vinyl chloride copolymer. From the viewpoint of moisture resistance, the content of vinylidene chloride in the copolymer is preferably in the range of 80 to 97% by weight. These vinylidene chloride resins are used alone or with a filler, a reinforcing agent, a plasticizer, an adhesiveness-imparting agent or the like added.

The thermoplastic resin having heat resistance, which is laminated on both sides of the vinylidene chloride resin layer via the adhesive layer, is a film formed on the vinylidene chloride resin layer against the strain applied to the moisture-proof layer during the formation of the double-layer glass. Sufficient strength that does not cause breakage etc., and when laminating a thermoplastic resin in a molten state further on the outer peripheral side of the moisture-proof layer of the formed double glazing, due to thermal decomposition etc. to the vinylidene chloride resin layer It is required to have heat resistance and heat insulation that do not cause deterioration of moisture proof performance.
From the viewpoints of strength, heat resistance, and heat insulation properties, examples of the thermoplastic resin material used for the thermoplastic resin layer include heat resistant thermoplastic resin materials such as polyamide, polyester, and polycarbonate. Of these, polyamides such as 6-nylon, 6-66 nylon and 6-12 nylon are preferable from the viewpoint of strength.

The adhesive layer for adhering the vinylidene chloride resin layer and the thermoplastic resin layer is not particularly limited as long as it is an adhesive having adhesiveness to both the vinylidene chloride resin layer and the thermoplastic resin layer. Examples thereof include thermoplastic adhesives such as acid-grafted polyolefin and thermoplastic polyurethane, and polyester-based and polyurethane-based thermosetting adhesives.

The moisture-proof layer 3 is a method of coextruding a vinylidene chloride resin, an adhesive, and a thermoplastic resin by using an extrusion molding machine, and a vinylidene chloride resin layer and a thermoplastic resin layer are separately used by an extrusion molding machine. It is manufactured by a method such as bonding with an adhesive after molding.

The moisture-proof layer thus produced has a temperature of [25 ° C., 9
5%] The water vapor permeability measured under the conditions of relative humidity is 0.2.
g / (m ² · day) or less, preferably 0.1 g
/ (M ² · day) or less.

The moisture proof layer has a water vapor permeability of 0.2 g / (m ²
-If it exceeds day), it cannot serve as a moisture-proof layer of double glazing. The water vapor permeability is JIS K712.
It can be measured by the 9B method.

The thickness of the vinylidene chloride resin forming the moisture-proof layer is preferably 100 μm or more from the viewpoint of moisture-proof property. From the viewpoint of workability, the total thickness of the moisture-proof layer is preferably 1000 μm or less, and particularly preferably 800 μm or less.
Therefore, considering the thickness of the thermoplastic resin layer laminated on both sides of the adhesive layer and the vinylidene chloride-based resin via the adhesive layer, the thickness of the vinylidene chloride-based resin forming the moisture-proof layer is 100 to 750 μm. The thickness of the thermoplastic resin layer laminated on both sides of the base resin via the adhesive layer is preferably 50 to 700 μm.

The composite multilayer film may be transparent or opaque. The degree of transparency can be adjusted according to the purpose of use of the composite glass.

The above-mentioned composite multilayer film can be used as it is as a moisture-proof layer of a multilayer glass, but a plurality of composite multilayer films can be laminated depending on the use as a multilayer glass.

The composite multilayer film of the present invention thus obtained has a water vapor permeability of [25 ° C., 95%].
The relative humidity is preferably 0.2 g / (m ² · day) or less, and particularly preferably 0.1 g / (m ² · day) or less. Those having a water vapor transmission rate of more than 0.2 g / (m ² · day) cannot serve as a moisture-proof layer of double glazing. The water vapor permeability can be measured by the JIS K7129 B method.

The multi-layer glass of the present invention has a method in which an inner layer formed in advance in the form of a cord is attached to a glass plate, a composite multilayer film which is a moisture-proof layer is laminated, and then the glass plate is made into a multi-layer. It can be produced by an appropriate method such as a method of laminating a composite multilayer film which is a moisture-proof layer on the inner layer formed in step (1) and then adhering it to a glass plate to form a multilayer glass plate.

Further, the thermoplastic resin containing the hygroscopic agent forming the inner layer and the composite multilayer film are held at a predetermined interval by using an extrusion molding machine, and the peripheral space between the facing surfaces of two or more glass plates. In addition, it can also be manufactured by simultaneously extruding and laminating from the die tip of an extruder or by integrating (laminating) each material in advance within the die tip and then extruding.

As a method for laminating a thermoplastic resin as an outer layer on the outer peripheral side of the moisture-proof layer, a room temperature curable resin such as thiochol resin or silicone resin is injected as an outer layer into the gap left outside the moisture-proof layer. And a method of melt-molding a thermoplastic resin such as vinyl chloride resin or urethane resin as the outer layer.

In the present invention, dry gas such as dry air, adiabatic gas or soundproofing gas can be blown into the hollow layer between the glass plates facing each other simultaneously with molding. By using a gas having a lower thermal conductivity than dry air, that is, a so-called heat-insulating gas, as a dry gas, the heat insulation of the double-glazed glass can be enhanced. As the heat insulating gas, an argon gas, a krypton gas, a sulfur hexafluoride gas, or the like is preferable, but not limited thereto.

As the glass plate used in the present invention, a transparent material such as polycarbonate or acrylic resin or a so-called organic glass plate obtained by surface-treating these materials can be used in addition to the ordinary inorganic glass plate. Further, a glass plate having a so-called dark ceramic color for concealing coating or a coating having various functions such as a heat ray reflecting function on the peripheral portion of the glass plate, and a tempered glass by a predetermined heat treatment can be used.

[0044]

[Examples] Production examples (Examples 1 and 2), Examples (Examples 3 and 4) and Comparative Examples (Examples 5, 6 and 7) are shown below, but the present invention is not limited thereto.

(Example 1) As a vinylidene chloride resin, a vinylidene chloride-vinyl chloride copolymer manufactured by Kureha Chemical Industry was used.
Mitsubishi Kagaku Modic F3100K as an adhesive, Toray 6-66 nylon, Amilan C as a thermoplastic resin
M6041XF was used. These resins were co-extruded using a multilayer circular die to produce a composite multilayer film for a moisture-proof layer. The thickness configuration of the laminated film was as follows.

[0046]

The water vapor permeability of the thus obtained composite multilayer film was measured using a water vapor permeability tester Permatran-W3 / 31 manufactured by Modern Control Co., Ltd., and it was found to be 0. 25 under relative humidity conditions of [25 ° C., 95%].
It was 1 g / (m ² · day). This composite multilayer film was slit into a width of 5.9 mm to obtain a moisture-proof layer for double-layer glass.

Example 2 A vinylidene chloride-vinyl chloride copolymer-made vinylidene chloride-vinyl chloride copolymer was used, and a vinylidene chloride-vinyl chloride copolymer single-layer film was produced using an extruder and a circular die. did.
The thickness of the film was 200 μm.

The water vapor permeability of the thus obtained monolayer film was measured using a water vapor permeability tester Permatran-W3 / 31 manufactured by Modern Control Co., Ltd., and 0.1 g was obtained under the condition of [25 ° C., 95%] relative humidity.
It was / (m ² · day). This single-layer film was slit into a width of 5.9 mm to obtain a moisture-proof layer for double-layer glass.

(Example 3) The laminated glass in this example is as shown in FIG.
The configuration is shown in. 2m glass plate with a thickness of 3mm 6m
The two dies of the extruder are made to face each other at an interval of m and are held by the robot, and the inner layer 2 and the moisture-proof layer 3 are integrally molded at the same time.
It was inserted between two glass plates.

Using this die, the water vapor permeability at [25 ° C., 95%] relative humidity is 0.01 g · cm / (m ²
・ Day), a butyl rubber containing a zeolite having a Shore A hardness of 35 degrees and an elongation of 300% is used as a resin for forming the inner layer 2, and the composite multilayer film obtained in Example 1 is used as a moisture-proof layer. Simultaneously and integrally molding into the voids formed on the inner surface of the glass plate, a double glazing having a 6 mm hollow layer was obtained.

(Example 4) The laminated glass in this example is as shown in FIG.
The configuration is shown in. 2m glass plate with a thickness of 3mm 6m
The two dies of the extruder are made to face each other at an interval of m and are held by the robot, and the inner layer 2 and the moisture-proof layer 3 are simultaneously molded integrally.
It was inserted between two glass plates.

Using this die, the water vapor permeability at [25 ° C., 95%] relative humidity was 0.01 g · cm / (m ²
・ Day), a butyl rubber containing a zeolite having a Shore A hardness of 35 degrees and an elongation of 300% is used as a resin for forming the inner layer 2, and the composite multilayer film obtained in Example 1 is used as a moisture-proof layer. In the void constituted by the inner surface of the glass plate, after integrally molding at the same time with the void remaining outside the moisture-proof layer, the vinyl chloride resin is melt-molded as an outer layer in the gap left outside the moisture-proof layer, A double glazing having a hollow layer of 6 mm was obtained.

(Example 5) Two glass plates with a thickness of 3 mm were used as 6
The robot was held at a distance of mm, and a die for forming the inner layer was inserted between two glass plates. Zeolite having a water vapor permeability of 0.01 g · cm / (m ² · day), a Shore A hardness of 35 ° and an elongation of 300% under a relative humidity of [25 ° C., 95%]. By molding the butyl rubber containing the above into a void constituted by the inner surfaces of two facing glass plates, a double-layer glass having a hollow layer of 6 mm was obtained.

(Example 6) Two glass plates with a thickness of 3 mm were used as 6
The robot was held at a distance of mm, and a die for forming the inner layer was inserted between two glass plates. Zeolite having a water vapor permeability of 0.01 g · cm / (m ² · day), a Shore A hardness of 35 ° and an elongation of 300% under a relative humidity of [25 ° C., 95%]. The butyl rubber containing the is simultaneously integrally molded into the void formed by the inner surfaces of the two opposing glass plates so that the void remains outside the butyl rubber layer, and then the chlorinated rubber is chlorinated as an outer layer in the void left outside the moisture-proof layer. The vinyl resin was melt-molded to obtain a double glazing having a 6 mm hollow layer.

(Example 7) Two glass plates with a thickness of 3 mm were used as six glass plates.
The robot was held at a distance of mm, and a die for simultaneously integrally molding the inner layer and the moisture-proof layer was inserted between the two glass plates. Using this die, the water vapor permeability at [25 ° C, 95%] relative humidity is 0.01 g · cm / (m ² · da).
y), a butyl rubber containing a zeolite having a Shore A hardness of 35 degrees and an elongation of 300% is used as a resin for forming the inner layer 2, and the vinylidene chloride-vinyl chloride copolymer single layer film obtained in Example 2 is used. The moisture-proof film is used as a moisture-proof layer and integrally molded into the voids formed by the inner surfaces of the two opposing glass plates at the same time, and then a vinyl chloride resin is melt-molded as an outer layer in the gap left outside the moisture-proof layer, A double glazing having a hollow layer of 6 mm was obtained.

Table 1 summarizes the moldability and durability of the double glazings shown in Examples 3 to 7. The moldability was evaluated by the film strength of the moisture-proof layer. Moisture resistance (moisture permeability) is JIS R3
209 and 3 were evaluated in a durability test of double glazing glass. From Table 1, it can be seen that by using the composite multilayer film of the present invention as the moisture-proof layer, high moldability can be realized and excellent moisture-proof performance can be exhibited.

[0058]

[Table 1]

[0059]

According to the present invention, a double-layer glass is manufactured by using a spacer having a structure in which a moisture-proof layer made of a composite multilayer film having a specific structure is laminated on the outer peripheral side of a thermoplastic resin containing a hygroscopic material. By manufacturing, while exhibiting excellent moisture-proof performance and molding processability, the spacer assembly process, desiccant filling process, etc. can be omitted from the conventional process, greatly reducing the equipment, working space, and saving labor. It is possible to reduce human labor and work time, and it is possible to provide the double-glazing unit at a low cost.

Further, by introducing a thermosetting resin or a thermoplastic resin as the outer layer, the durability and reliability can be further improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of the structure of a double-glazing unit of the present invention.

FIG. 2 is a cross-sectional view showing an example of the structure of the double glazing of the present invention.

FIG. 3 is a schematic cross-sectional view showing an example of the structure of the composite multilayer film of the present invention.

[Explanation of symbols]

 1a, 1b: Glass plate 1c: Spacer 1d: Hollow layer 2: Inner layer 3: Moisture-proof layer 4: Outer layer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshitaka Matsuyama 1150, Hazawa-machi, Kanagawa-ku, Kanagawa Prefecture Asahi Glass Co., Ltd. Central Research Laboratory (72) Inventor Hideki Nakagawa 1150, Hazawa-machi, Kanagawa-ku, Yokohama Asahi Glass Co., Ltd. Central Research Laboratory (72) Inventor Takashi Shibuya 1150 Hazawa-machi, Kanagawa-ku, Yokohama, Kanagawa Asahi Glass Co., Ltd. Central Research Laboratory (72) Inventor Hideaki Tanaka 1879-3 (72) Invention, Shimoinakichi, Chiyoda-cho, Shinji-gun, Ibaraki Prefecture Noritaka Kasai 3-10-13 Nerima, Nerima-ku, Tokyo

Claims (7)

[Claims] 1. A multi-layer glass comprising two or more glass plates facing each other with a spacer at a predetermined interval so as to form a hollow layer, the spacer comprising a hygroscopic material. An inner layer made of a thermoplastic resin contained therein, and a moistureproof layer made of a composite multilayer film laminated on the outer peripheral side of the inner layer, and the composite multilayer film has heat resistance on both sides of the vinylidene chloride resin layer. A multi-layer glass comprising one or more layered structures in which a certain thermoplastic resin layer is laminated. 2. The spacer further comprises a layer made of a thermosetting resin or a thermoplastic resin outside the moisture-proof layer, and an inner layer / composite multilayer made of a thermoplastic resin containing a hygroscopic material from the hollow layer side. 2. The double glazing according to claim 1, which has a structure in which an outer layer made of a thermosetting resin or a thermoplastic resin having a function of maintaining a gap between a moisture-proof layer made of a film and a hollow layer is laminated in this order. 3. The double glazing according to claim 2, wherein the thermosetting resin or thermoplastic resin constituting the outer layer is a polyurethane resin or a plasticized polyvinyl chloride resin. 4. The double glazing according to claim 2, wherein the thermosetting resin or the thermoplastic resin constituting the outer layer is bonded to two or more glass plates via a primer. . 5. The thermoplastic resin forming the inner layer,
[25 ° C, 95%] 0.1 g · cm / in relative humidity conditions
The double glazing according to claim 1, 2, 3 or 4, having a water vapor permeability of (m ² · day) or less. 6. The composite multi-layer film is [25 ° C., 95
%] Having a water vapor transmission rate of 0.2 g / (m ² · day) or less under relative humidity conditions.
2, 3, 4 or 5 double glazing. 7. A spacer which is provided at a peripheral portion of a double-glazing unit composed of two or more glass plates and which opposes the two or more glass plates so as to form a hollow layer, the spacer comprising: It has a structure in which a moisture-proof layer made of a composite multilayer film is laminated on the outside of an inner layer made of a thermoplastic resin containing a hygroscopic material, and the composite multilayer film has heat resistance on both sides of the vinylidene chloride resin layer. A multi-layer glass spacer comprising one or more layered structures in which thermoplastic resin layers are laminated.