JPH11189439A - Double glazing and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a double glazing capable of simplifying a production process, simply achieving high sealing reliability and thereby reducing the production cost and to provide a method for producing the double glazing. SOLUTION: This double glazing 1 comprises a spacer 4 composed of at least two layers of the first spacer 5 composed of a stringy resin layer 7 containing a drying agent filled therein and having self tack and the second spacer 6 composed of a rigid member 8 having a bonding layer 9 and is obtained by arranging the first spacer 5 on the inside and the second spacer 6 on the outside in the double glazing 1. The method for producing the double glazing 1 comprises applying the first spacer 5 on the inside and the second spacer 5 on the outside to a peripheral edge of one sheet 2 of the sheets 2 and 3 of flat glass or a part on a somewhat inner side thereof, then applying the other sheet 3 of flat glass thereto, carrying out the contact bonding, thereby bonding and integrating the two sheets 2 and 3 of the flat glass.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-glazed glass having a heat insulating property, and is used for a construction field such as a house and a non-house, an automobile,
It is applied to openings that require energy saving, such as in the transportation field of vehicles, ships, aircraft, etc., and in the field of equipment such as freezers, freezer showcases, and temperature and humidity chambers.

[0002]

2. Description of the Related Art In recent years, in order to create a comfortable and healthy living environment with excellent energy saving, double glazing having heat insulation performance has been used more frequently than ever before and has been rapidly spreading.
Various types are used and proposed as this double-glazed glass.

[0003] For example, as a spacer for a double-glazed glass, there is known an aluminum hollow cylindrical body filled with a desiccant as disclosed in JP-A-59-45149. This cylindrical aluminum spacer is cut into predetermined dimensions in advance, and after filling the hollow part with a desiccant,
Each end is joined using a corner connection key to be assembled into a frame, or is bent into a predetermined shape, and the ends are joined using a connection key to be assembled into a frame, and then a hollow portion is formed. Is filled with a desiccant. Next, a butyl rubber-based sealing material is applied as a primary sealing material to two surfaces of the cylindrical aluminum spacer frame that are to be bonded to the glass, and this is affixed slightly inside the peripheral edge of one glass plate. After that, the other glass plate was stuck thereon and pressure-bonded to form a hollow space with the two glass plates and the spacer, and then the outer cross section was opened in a substantially U-shape. Liquid polysulfide-based, silicone-based, polyurethane-based resin is applied and filled as a secondary sealing material in the concave space,
At present, a so-called dual-seal double-layered glass, which is hardened at a temperature near normal temperature and is strongly bonded and integrated with a glass plate, is currently the most common one.

For example, JP-B-63-50508 and JP-A-6-123191 disclose a continuous rigid spacer, such as a corrugated aluminum plate, in a self-adhesive resin layer filled with a desiccant. After sticking a string-like material with embedded, etc., slightly inside the peripheral edge of one glass plate, the other glass plate is pasted on it and pressed and bonded, and integrated into two glass plates There is described a so-called single-sealing double-layer glass in which a hollow space sealed with a spacer and a spacer is formed, and some are currently used.

[0005] For example, in Japanese Patent Application Laid-Open No. 9-77536, two or more glass plates are arranged to face each other via a resin spacer so as to form a hollow layer, and the periphery of the glass plate and the outer periphery of the spacer are formed. In the double-glazed glass in which the concave portion is formed with the concave portion and the concave portion is filled with the sealing material, the sealing material exhibits fluidity at a temperature of 60 ° C. or more and
A double glazing characterized by comprising a thermoplastic resin having a JISA hardness of 25 or more and less than 70 at 5 ° C. is described.

[0006] For example, Japanese Patent Application Laid-Open No. Hei 7-223848 discloses that at least two glass plates are separated from each other so that an intermediate layer is formed with spacers interposed therebetween, and the peripheral edges are sealed. In the double-glazed glass, the spacer is composed of a moisture-permeable resin material layer having at least low moisture permeability and a desiccant and an adhesive layer sealing a peripheral portion, and the low moisture-permeable layer is a moisture-permeable resin material layer. A multi-layer glass is interposed between external air outside the outer periphery of the multi-layer glass and at least a part of the moisture-permeable resin material layer communicates with an intermediate layer. .

[0007] For example, Japanese Patent Application Laid-Open No. Hei 8-91879 discloses that a rubber spacer in which a desiccant is dispersed and mixed, which is flexible and self-adhesive, is arranged around a plurality of glass sheets. In a double-layer glass assembled by providing a hollow layer between glasses, a non-woven fabric or a woven fabric carrying a desiccant is attached to part or all of the surface of the spacer in contact with the hollow layer. Glass is disclosed.

[0008] For example, Japanese Patent Application Laid-Open No. 8-143340 discloses a double-glazing system in which at least two glass plates are opposed to each other at a predetermined interval via a spacer on the periphery thereof so as to form a hollow layer. The spacer has a structure in which an inner layer made of a thermoplastic resin material containing a moisture absorbing material, an intermediate layer made of a film, and an outer layer made of a thermoplastic resin material are laminated in this order from the hollow layer side. A double glazing characterized by certain features is disclosed.

[0009] For example, Japanese Patent Application Laid-Open No. Hei 8-13936 discloses a cut for imparting easy bending property to one side face facing the peripheral end face when the glass sheets are spaced from each other. A spacer main body made of a shape-retaining material having a notched portion, and a non-moisture-permeable member disposed on the other side of the spacer main body to block between an internal space formed between the sheet glasses and the outside And a moisture-absorbing member for dehumidifying the air in the internal space, which is superposed on the moisture-impermeable member, and formed by laminating and integrating the same.

[0010]

However, the above-mentioned double-layer glass using a cylindrical aluminum spacer disclosed in, for example, JP-A-59-45149, has a cylindrical aluminum spacer having a predetermined size. Cut into a hollow part, filled with a desiccant, and joined at each end using a corner connection key to be assembled into a frame, or bent into a predetermined shape, and the end is used with a connection key. After joining and assembling into a frame, the hollow portion is filled with a desiccant. Next, a butyl rubber-based sealing material is applied as a primary sealing material to two surfaces of the cylindrical aluminum spacer frame that are to be bonded to the glass, and this is affixed slightly inside the peripheral edge of one glass plate. After that, paste the other glass plate on it and crimp it,
Liquid polysulfide, silicone, etc. as a secondary sealing material in an open concave space whose outer cross-section is formed by two glass plates and a cylindrical aluminum spacer, and has an approximately U-shaped cross section. A polyurethane-based resin is applied and filled, cured at a temperature around room temperature, and firmly bonded and integrated with a glass plate. The manufacturing process is complicated, and the manufacturing cost is high.

In addition, since the secondary sealing material is in a liquid state, if the control and adjustment of the coating process are poor, a shortage of the liquid in the corner portion or a dripping of the liquid in the straight portion will occur, thereby reducing the workability. In addition, there is a problem that the product yield is reduced, for example, the glass plate becomes dirty. In addition, the entire production line may stop.

For example, the double-glazing described in JP-B-63-50508 and JP-A-6-123191 includes a continuous rigid spacer in a self-adhesive resin layer filled with a desiccant. For example, since a string-like material in which a corrugated aluminum plate or the like is embedded is merely provided at the peripheral edge of the glass plate or slightly inside thereof, the manufacturing process is simplified and the manufacturing cost is relatively low. However, the adhesive strength between the self-adhesive resin layer filled with the desiccant and the glass plate is significantly reduced, for example, when stored in a high-temperature atmosphere such as in summer,
Depending on the storage state, there is a problem that shear deformation is likely to occur before fitting into the sash, and in order to prevent this shear deformation, the outer cross section formed by two glass plates and spacers has a substantially U-shape. As in the case of using a cylindrical aluminum spacer, a liquid polysulfide-based, silicone-based, or polyurethane-based resin is applied and filled as a secondary sealing material in the open concave space, and cured at a temperature around room temperature. In some cases, it is firmly bonded and integrated with the glass plate, but in this case, there is a problem that the production cost is higher than that of the cylindrical aluminum spacer system.

In addition, when a liquid material is applied and filled as a secondary sealing material, if the control and adjustment of the application process are poor, a shortage of liquid in a corner portion or a dripping in a straight line portion occurs, which leads to an increase in workability. In addition, there is a problem that the product yield is lowered, for example, the glass plate becomes dirty. In addition, the entire production line may stop.

[0014] For example, in the double glazing described in Japanese Patent Application Laid-Open No. 9-77536, two or more glass plates are arranged to face each other via a resin spacer so as to form a hollow layer, and the periphery of the glass plate is formed. In a double-layer glass in which a concave portion is formed between the portion and the outer peripheral portion of the spacer and the concave portion is filled with a sealing material, the sealing material exhibits fluidity at a temperature of 60 ° C. or more, and has a JISA hardness of 25 at 25 ° C.
The process of heating and melting the thermoplastic resin to show fluidity and filling the recesses using an extruder or the like is a precision process for supplying a fixed amount without excess or shortage. Since a simple control device is required, there is a problem that the initial capital investment is large. In addition, for example, there is a case where the aluminum sash has a temperature of 60 ° C. or higher without eaves due to strong direct solar radiation such as in summer, and plastic deformation due to expansion of the hollow space in the aluminum sash is likely to occur. There is.

Further, for example, Japanese Patent Application Laid-Open Nos. Hei 7-223848, Hei 8-91879, Hei 8-1433
The double glazing described in Japanese Patent No. 40 does not use aluminum spacers, so there is an advantage that the work of assembling the frame of aluminum spacers is unnecessary, but the resin spacers are less rigid than aluminum spacers, so they are deformed. There is a problem that flat stacking cannot be performed during the curing period, and deformation occurs due to an increase in the number of sheets even when placed vertically.

For example, the spacer for double-glazing described in Japanese Patent Application Laid-Open No. H8-13936 is easily bent to one side facing the peripheral end face when the glass sheets are spaced from each other. A spacer main body made of a shape-retaining material having a cut portion for imparting property, and an inner space formed between the glass sheets and disposed outside of the spacer main body on the other side of the spacer main body. And a moisture-absorbing member for dehumidifying the air in the internal space which is superimposed on the moisture-impermeable member, and is formed by laminating and integrating the non-moisture-permeable member, and the cutout portion is provided. In the case of flat stacking with a spacer body made of a shape-retaining material, the spacing can be maintained, but since the spacer body has no adhesive means on the two surfaces that come into contact with the glass, it is necessary to place it vertically. , It is said that plate slip deformation occurs There is a problem.

The present invention has been made in view of the above-mentioned conventional problems. Since the first spacer and the second spacer are formed in advance and can be easily arranged, the manufacturing process is simplified. It is an object of the present invention to provide a double-glazed glass capable of simplifying the structure and having high rigidity, capable of maintaining a gap and suppressing plate slippage, and a method of manufacturing the same.

[0018]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is to separate two glass plates at a predetermined interval and to provide a spacer for maintaining the interval at a peripheral edge of the panel. In the double glazing in which a sealed hollow space is formed by disposing the first spacer and the second spacer, the spacer comprises at least two layers of a first spacer and a second spacer, and the first spacer is filled with a desiccant. It is made of a string-shaped resin layer having self-adhesiveness, the second spacer is made of a rigid member having an adhesive layer,
The first spacer is located inside and the second spacer is located outside, and the respective spacers are provided.

As a method of manufacturing the same, the spacer is composed of at least two layers of a first spacer and a second spacer, and a self-adhesive string-like resin layer filled with a desiccant as the first spacer. With the rigid member having an adhesive layer as the second spacer on the outside, and affixed to the peripheral edge of one glass plate or slightly inside thereof, and then the other on It is characterized in that a glass plate is attached and pressed and bonded and integrated with two glass plates.

In the present invention, the first spacer is a sealing material for sealing the hollow space and maintaining the hollow space in a dry state, and the second spacer is an interval holding member for holding two glass plates at a predetermined interval. Since the first spacer having self-adhesiveness and the second spacer having the adhesive layer are both preformed, they are arranged and assembled. It is characterized in that a double glazing can be manufactured with only simple operations.

As a secondary sealing material, a liquid curable resin, which has a high viscosity as in the past but cannot be handled as a cord-like material, is applied, or a heat-melted high-viscosity but string-like resin is used. Instead of filling with a thermoplastic resin that cannot be handled as a fluid state, it is only necessary to arrange a preformed rigid member having an adhesive layer as a second spacer, so that control and adjustment of the coating process are performed. There is no problem that the product yield is reduced due to the lack of liquid in the corners and the drop in workability due to liquid dripping in the straight part and the dirt on the glass plate, etc.
Furthermore, this does not cause the entire production line to stop.

Instead of applying a liquid curable resin as a conventional sealing material or filling a fluidized thermoplastic resin heated and melted with an extruder or the like as in the prior art, Since only a preformed rigid member having an adhesive layer is disposed as a spacer for 2,
There is no need for a precise control device to supply a fixed amount without excess or deficiency, and the amount of initial capital investment can be reduced.

Further, since the second spacer made of a rigid member having an adhesive layer can be bonded and integrated with the glass plate, the displacement of the plate can be suppressed even in a case where the second spacer is stored in a high-temperature atmosphere such as in summer. In addition, even in the case where there is no eaves and the temperature of the aluminum sash becomes 60 ° C. or more due to strong direct sunlight such as in summer, plastic deformation due to expansion of the hollow space in the aluminum sash is suppressed. can do.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Two glass plates are clear float plate glass, heat absorbing plate glass, heat reflecting plate glass, high-performance heat reflecting plate glass, wire filled plate glass, net filled plate glass, template glass, tempered glass, double strength. Glass, low-reflection glass, water-repellent glass, hydrophilic glass, photocatalytic glass, conductive glass, highly transparent glass, ground glass, tapesti (frost) glass, ceramic printing glass, fusion glass, stained glass, laminated glass, Various types of plate glass such as low-expansion plate glass (including borosilicate glass) and low-melting plate glass can be appropriately combined. At least one of these various plate glasses is a low-radiation plate glass coated with a special metal film or a special metal film. Pasted coated resin film It is preferable to employ a radiation plate glass.

More preferably, the low emissivity glass sheet has a vertical emissivity of 0.20 or less, preferably 0.2 mm or less according to JIS R 3106-1985 (Testing method for transmittance, reflectance and solar heat gain of the glass sheet). 10 or less glass or one with a vertical emissivity of 0.35
The following two, preferably 0.25 or less glasses are used.

The thickness of the two glass plates is usually 1.
A glass having a thickness of 9 mm or more is used. In the case of a tempered glass, particularly in the case of chemically strengthened glass, the thickness is not limited thereto, and a glass having a size of 1.9 mm or less can be used.

In the case where the second spacer can be formed to have a desired radius of curvature, a two-dimensional or three-dimensional curved glass can be easily produced as a double-layer glass. Further, in the embodiment, two glass plates are used. However, three or more glass plates may be combined at intervals, as a matter of course. Further, other than the inorganic glass, a resin glass such as an acrylic plate and a polycarbonate plate may be used, and is not particularly limited.

The distance between the two glass plates is at least 0.2 mm, preferably at least 2 mm. Even when three or more glass plates are used in combination,
Similarly, it is at least 0.2 mm, preferably at least 2 mm.

The first spacer is made of a self-adhesive string-like resin layer filled with a desiccant, and has a sufficient moisture absorbing property to absorb moisture in the hollow space, thereby lowering the initial dew point. In addition, by having sufficient moisture absorption performance to adsorb moisture entering from the outside and moisture impermeability that does not allow moisture to permeate into the hollow space, the durability of dew point performance is excellent. It can be caused by moisture released from the resin layer composition itself, low molecular weight plasticizers, etc., internal condensation observed visually in the hollow space, or clouding called so-called fogging There are no problems such as defects, and the resin layer composition itself can be formed into a string shape, and the one formed into a string shape can be handled as a spacer, Scan it is intended deformable so as to conform to the shape of, and those having a plasticity that can retain substantially intact form even when bent at the corner portion.

In the first spacer, self-adhesive resins (including rubber and elastomer) include polyisobutylene (including reactive polyisobutylene), butyl rubber (including unvulcanized butyl rubber and partially vulcanized butyl rubber), A copolymer containing polyisobutylene as one component, hot melt butyl (for example, M-145, M-
120, including commercially available compounds such as Kanebo NSC 88-7500), and, if necessary, an aliphatic hydrocarbon-based resin, an aromatic hydrocarbon-based resin as a tackifier, Self-adhesiveness and flexibility by adding polybutene, polybutadiene, polyisobutylene, etc. as plasticizers such as alicyclic hydrocarbon resins, hydrogenated alicyclic hydrocarbon resins, terpene resins, cumarone resins, rosin derivatives, etc. Is expressed.

In the first spacer, silica gel, sintered silica, activated carbon, activated alumina, anhydrous calcium sulfate, zeolite (3A, 4A, 5
A, 13X) and the like, as an essential component, at least one or more desiccants in an amount of 20 to 60% by weight, preferably 25 to 45%.
%, and the form of the desiccant is in the form of fine powder, granule or rod, and is not particularly limited, but in order to quickly lower the initial dew point, the particle diameter is 200 μm or less, particularly 100 μm or less. Powders are preferred.

As the filler that can be added together with the desiccant, various fillers can be used as needed.
For example, natural mica such as muscovite and phlogopite, synthetic mica,
Graphite, glass flake, ferrite, clay,
Flaky filler such as talc, hillite, smectite, magnesium silicate, stainless flake, aluminum flake, nickel flake, calcium carbonate, magnesium carbonate, silica, alumina, iron oxide, boron nitride, reinforcing silica, silica sand, sericite , Calcium silicate, titanium oxide, kiln ash, glass beads, carbon black, white carbon and other particulate fillers, glass fiber, carbon fiber, aramid fiber and other fibrous fillers can be used, and various fibers are processed For example, a fibrous material such as a cord, a rope, a felt, a nonwoven fabric, a woven fabric, or a knitted fabric obtained by binding fibers can be used as the core material. In addition to the above, if necessary, a flame retardant, an adhesion improver such as a silane-based, titanate-based, or aluminum-based coupling agent, bentonite, organic bentonite, montmorillonite, ultrafine silica powder,
A thixotropy-imparting agent such as ultrafine powder titania and ultrafine powder alumina, and a thickening agent such as methylcellulose, methylcellulose sodium salt, magnesium oxide, and magnesium hydroxide can be appropriately added. These fillers contain 20 to 60 wt%, preferably 25 to 45 wt%, of the total amount of the filler and the desiccant.

The first spacer is made of resin, for example, by using a kneader such as a kneader, particularly preferably a closed type kneader in which undesired gas such as moisture does not enter and exit.
After adding and kneading various compounding compositions such as a tackifier, a desiccant, and other fillers, a cross-section of a string-like one having a substantially rectangular shape is extruded from a die using an extruder or the like, A deformable string-shaped first spacer having self-adhesiveness can be formed.

However, in the case of using a fiber processed material such as a cord-like material, a rope, a felt, a nonwoven fabric, a woven fabric or a knitted fabric obtained by processing various fibers as a filler, for example, a kneading machine is used. After mixing and kneading various compounding compositions such as resins, tackifiers, desiccants, and other fillers (excluding fiber processing materials), the obtained kneaded material is impregnated into the fiber processing material to form a cross section. By forming into a substantially rectangular string shape, a string-like first spacer having self-adhesiveness and having a fiber material as a core material can also be formed.

The string-shaped first spacer is used for producing a double-glazed glass while molding or within a short time after molding, and the amount of moisture which is originally undesirably adsorbed during the production is used. However, if the amount is small enough not to cause a problem with the dew point performance of the double-glazed glass, there is no need to take any particular measures for moisture proofing. It is preferable that the storage management is performed after performing a moisture proof treatment such as sealing and packing with a sheet having performance.

In addition, the first spacer formed in a string shape has to be carefully designed so that the adhesive surface is not contaminated. Therefore, when the first spacer is used after a certain period of time has passed after the molding, the adhesive surface is not removed. In order not to be contaminated, for example, polyethylene, polypropylene, polytetrafluoroethylene, a film or sheet of polyester such as polyethylene terephthalate, more preferably a release material such as a kraft paper or a film or sheet coated with a silicone release agent was adhered. It is preferably stored and managed above.

Next, as the adhesive layer in the second spacer, various commonly used resin-based or rubber-based adhesives may be used, but a double-sided adhesive tape or a heat adhesive tape is attached to the rigid member. This is preferable because it can be easily attached to glass. More specifically, the double-sided adhesive tape is a resin-based double-sided adhesive tape such as a resin-based acrylic resin or the like, or a rubber-based double-sided adhesive tape such as a butyl rubber-based resin.
No. 5915, N-5401, etc. On the other hand, as the thermal adhesive tape, acrylic resin type, ethylene vinyl acetate resin type, resin type such as epoxy resin type, and rubber type thermal adhesive tape such as nitrile rubber type are used. For example, Nitto Denko Corporation M-5200, 5205, M-5213,
M-5250, M-5251, M-5257, M-53
00, M-5310, etc., each having a thickness of 0.0
25 mm or more and 2 mm or less, preferably 0.030 m
m or more and 1.5 mm or less, and the substrate may be one having a nonwoven fabric, woven fabric, foam, resin film, Japanese paper, or the like as a base material, or one having no base material. JIS in order to suppress board slippage
The peel adhesion by the method specified in Z 1528 is 0.5 kgf / 20 mm or more, preferably 1.0 kgf /
20 mm or more, and a shear adhesive strength of 2.5 kgf / c
m ² or more, preferably 5.0 kgf / cm ² or more. In particular, a heat adhesive tape is used at a temperature of 200 ° C. or less, usually 80 to 170 ° C. for several seconds to several minutes, and 1 to 10 kgf.
/ Cm ² is applied, and the adhesive strength is preferably 1.5 kgf / 20 mm or more and the shear adhesive strength is 25 kgf / cm ² or more, and a high adhesive strength can be obtained. In addition to the adhesive tape described above, there is also an adhesive tape that is adhered by ultraviolet irradiation or the like, and any adhesive tape that can obtain the predetermined peel adhesive strength and shear adhesive strength described above may be used.

In the second spacer, a rigid resin, a metal / alloy, or ceramics can be used as the rigid member. Examples of the hard resin (including a hard elastomer and a hard rubber) include polyesters such as polyethylene, polypropylene, acrylic, polystyrene, polycarbonate, polyvinyl chloride, ABS, and polyethylene terephthalate, epoxy resins, and unsaturated resins. Hard resins such as polyesters, polyurethanes, hard elastomers such as silicones, natural rubber, hard rubbers such as styrene-butadiene rubber and fillers for them, if necessary, various things such as muscovite and phlogopite Natural mica, synthetic mica, graphite, glass flake, ferrite, clay, talc, hillite, smectite, magnesium silicate, flake filler such as stainless flake, aluminum flake, nickel flake, calcium carbonate, carbonic acid Gnesium, silica, alumina, iron oxide, boron nitride, reinforcing silica, silica sand, sericite, calcium silicate, titanium oxide, kiln ash, glass beads, particulate filler such as carbon black, white carbon, glass fiber, carbon A composite material in which fibrous fillers such as fibers and aramid fibers are mixed is used.

The metals and alloys include iron, aluminum,
Tungsten, nickel, chromium, titanium, carbon steel, chrome steel, nickel steel, stainless steel, nickel chrome steel, manganese steel, chromium manganese steel, chromium molybdenum steel, silicon steel, brass, nichrome, duralumin, and the like are used.

As the ceramic, glass, alumina, silicon carbide and the like are used. Further, the rigid member used for the second spacer has a cross-sectional shape such as a substantially rectangular solid body, that is, a prismatic body, a substantially rectangular hollow body, that is, a square pipe body, or a U, K, E, king, concave shape, or the like. It has an opening, and the adhesive layer is provided on at least two opposing surfaces of the outer surface of the rigid member that are bonded to the glass.

The concave spacer is rotated by 90 ° when the two glass sheets are horizontal, and arranged so that both outer sides of the concave glass are in contact with the glass sheets. ^In addition, the second spacer made of a rigid member having an adhesive layer has to be carefully designed so that the adhesive surface is not contaminated. For example, a film or sheet of polyester such as polyethylene, polypropylene, polytetrafluoroethylene, or polyethylene terephthalate, and more preferably a release material called a separator such as a kraft paper or a film or sheet coated with a silicone release agent is adhered. It is preferable that the storage be performed after the storage. When a double-sided adhesive tape or a heat adhesive tape is used as the adhesive layer, since a release material is originally provided, it is used as it is. The double-sided adhesive tape or thermal adhesive tape adhered to the rigid member is preferably the one with the release material attached, and the release material is peeled off immediately before being placed on the glass plate or immediately before the glass plates are stacked. Is preferable in order not to contaminate the adhesive layer and to obtain a sufficient adhesive strength.

The second spacer, which is made of a rigid member having an adhesive layer, exhibits an appropriate rigidity and adhesive strength after bonding, so that the double-layer glass can be stored particularly in a high-temperature atmosphere such as in summer. Even in such a case, plate slippage can be suppressed, and even in a case where there is no eaves and the aluminum sash reaches a temperature of 60 ° C or more due to strong direct solar radiation such as in the summer, hollow inside the aluminum sash Plastic deformation due to expansion of the space can be suppressed.

Next, a method for producing a double glazing will be described. The first spacer made of a string-shaped resin composition having self-adhesiveness filled with a desiccant and the second spacer made of a rigid member having an adhesive layer are separated spacers, and the first spacer is placed inside the first spacer. Then, with the second spacer on the outside, a manual operation using a positioning and bonding jig at a peripheral edge of one glass plate or a predetermined position slightly inside the peripheral edge, or a semi-automatic or fully-automatic mechanical And the first spacer disposed inside has a self-adhesive property,
Since the second spacer has an adhesive layer, it can be fixed. Then, the other glass plate is attached and crimped,
A double-glazed glass is obtained by bonding and integrating with two glass plates.

As described above, a double-glazed glass can be manufactured by a simple operation of arranging the first spacer and the second spacer formed in advance on a glass plate and superposing them.
Although the first spacer and the second spacer are disposed so as to be substantially parallel to each other, they may be disposed in close contact with each other, or may be disposed slightly apart from each other.

Since the first spacer has a self-adhesive property, when the first spacer and the second spacer are disposed in close contact with each other, the first and second spacers are adhesively integrated, and the second spacer is further bonded. When the adhesive layer is also provided on the surfaces that are in close contact with each other, the first and second spacers are more strongly adhesively integrated.

The first spacer must be arranged so that there is no gap over the entire periphery of the peripheral edge in order to hermetically seal the hollow space. On the other hand, the second spacer is preferably disposed so as to have no gap over the entire periphery of the peripheral edge portion in order to hermetically seal the hollow space. However, the second spacer is divided and disposed substantially over the entire periphery. No problem. For example, in the case where the second spacer is provided on a rectangular glass plate, it is preferable that the second spacer be formed as a single member or be bonded to the second spacer. However, the second spacer is divided into two or four. It may be arranged. However, even in the case of division, it is preferable to arrange the gap so as to be 10% or less, and preferably 1% or less of the entire circumference, in order to maintain the interval and to suppress the board displacement during storage. When the performance of hermetically sealing the hollow space of the first spacer is particularly excellent, the second spacer may have a gap of 10% or less, preferably 1% or less of the entire circumference.

Regarding the order of disposing the first spacer and the second spacer, the arrangement of the first spacer and the disposition of the second spacer may be reversed. After installation, even if the first spacer is arranged,
Alternatively, after arranging the divided second spacer pieces,
Even if the operation of disposing a part of the first spacer is repeated, conversely, after disposing a part of the first spacer,
The operation of arranging the divided second spacer pieces may be repeated.

The double-glazed glass thus obtained is introduced into a heating furnace as required, or only the spacers are heated to be more firmly bonded and integrated with the glass plate. Double glazing can also be obtained. The heat treatment can be performed at a temperature of 200 ° C. or lower, preferably 170 ° C. or lower.

In order to more firmly bond and integrate in the heating step, the whole of the multilayer glass is pressed before the introduction into the heating step with a pressure such that the total thickness of the multilayer glass becomes very small. While heating while pressurized, or while passing between the rolls while pressing the entire double-glazed glass by passing between multiple rolls adjusted so that the roll interval gradually narrows only slightly It is good to heat it. As a method of bonding this spacer, other than heat treatment, for example, ultraviolet irradiation,
Other methods such as electron beam irradiation may be used.

A first member, which is a self-adhesive string-shaped spacer filled with a desiccant and is provided at a predetermined position on the peripheral edge of the glass plate or slightly inside thereof, and a rigid member having an adhesive layer. Regarding the second spacer, the ends of the first spacer are sufficiently press-bonded and joined to each other,
The hollow space must be sealed, but the ends of the second spacer abut each other and after joining if necessary,
For example, the entire multi-layer glass is introduced into a heating furnace, and the spacer is bonded and integrated with the glass plate to obtain a multi-layer glass.

However, the ends of the second spacer are
Just by abutting, a gap may remain, in which case, the gap between the joints between the ends is filled with a resin layer composition having the same self-adhesiveness as the first spacer disposed inside. Sealing reliability can be further ensured.

Further, for example, when the entire double-glazed glass is introduced into a heating furnace and the spacer is firmly bonded and integrated with the glass plate, problems such as image distortion caused by thermal expansion of the air layer in the hollow space, Conversely, when the air temperature in the hollow space has dropped to around room temperature, the spacers must be inserted before introduction into the heating furnace to prevent problems such as image distortion caused by thermal shrinkage of the air space in the hollow space. The ends are not joined to each other, for example, a gap of about 1 mm to 3 mm is provided. After the heat treatment, when the air temperature in the hollow space decreases to around room temperature, the same as the first spacer disposed inside. By filling the resin layer composition having the self-adhesiveness into the gap, the sealing performance can be ensured.

In this case, for example, when an ultrasonic welding device is used, the self-adhesive resin layer composition filled in the gap and the self-adhesive resin layer composition filled in the gap and the spacer are filled with the spacer. Adhesion with the end portion becomes stronger, and the sealing reliability can be further ensured.

Alternatively, a pipe having an inner diameter of, for example, about 1 mm to 3 mm is buried in a portion where the ends of the spacer are joined so that the hollow space communicates with the outside air. When the temperature dropped to around room temperature, the pipe was withdrawn and the first
The sealing performance can be ensured by filling a resin layer composition having the same self-adhesiveness as that of the spacer.
Alternatively, the sealing performance can be ensured by filling the resin layer composition having the same self-adhesiveness as the first spacer disposed inside the hole of the pipe without extracting the pipe. Alternatively, when the pipe is formed of a material having a small gas permeability coefficient, for example, a plastic such as polyethylene, polyethylene terephthalate, or polyvinylidene fluoride, or a plastic on which a metal such as aluminum is deposited, the air temperature in the hollow space is around room temperature. At this point, the sealing performance can be ensured by sealing the pipe by heat sealing or the like.

Further, the self-adhesive resin layer composition to be filled in the gap between the end portions of the spacer has been described as being the same as the first spacer disposed inside.
In particular, in order to more reliably fill the gap, it is desirable to have a higher self-adhesiveness. For this reason, it is of course possible to use a filler other than the essential filler without filling or using a filler with a reduced filling rate. .

The self-adhesive resin layer composition which fills the gaps between the ends of the spacer is heated at a temperature of 200 ° C. or less to reduce the viscosity, thereby improving the sealing performance. It can be assured.

Further, the spacer is constituted by at least two layers of the first spacer disposed inside and the second spacer disposed outside, because the spacer is formed in the middle of the two layers or the second spacer. Further outside the spacer, if necessary, a film having a small gas permeability coefficient, for example, a plastic film such as polyethylene, polyethylene terephthalate, an aluminum foil, a metal foil such as a stainless steel foil and a laminated film obtained by laminating them, or a metal such as aluminum. A vapor-deposited plastic film may be provided.

Regarding the cross-sectional dimensions of the spacer, the thickness of the first spacer can be substantially the same as or slightly larger than the thickness of the hollow space, and the thickness of the second spacer can be substantially the same as the thickness of the hollow space. On the other hand, the width can be set so that the sum of the width of the first spacer and the width of the second spacer does not cause a problem in appearance when the multilayer glass is fitted into the sash. More specifically, the width of the first spacer and the width of the second spacer are preferably 1.5 mm or more, depending on the product dimensions of the multi-layer glass, the glazing channel, and the sash.

The cross-sectional shape of the second spacer is U,
E, about a rigid member having an opening such as a concave shape, the direction of the opening may be on the hollow space side or on the outside as long as it faces in parallel with the glass plate, but when sticking a protective tape to the peripheral edge, Preferably, it faces the hollow space.

Further, by sticking the tape over a part or the entire periphery of the peripheral edge of the double-layer glass, the edge of the glass is protected, and depending on the material of the tape, the displacement of the plate during storage can be suppressed. it can. As this tape,
In addition to general vinyl resin tapes, plastic films such as polypropylene resin, polyester resin, fluorine resin, and silicone resin, aluminum foil,
Use a metal foil such as a stainless steel foil and a laminated film obtained by laminating them, a plastic film on which a metal such as aluminum is deposited, or a tape coated with an adhesive on one surface of various films and sheets such as a soft metal sheet such as lead and zinc. be able to.

Further, a glazing channel made of resin can be mounted over almost the entire periphery of the peripheral edge of the double-glazed glass. In addition, as a gas sealed in the hollow space of the multi-layer glass, besides air, argon gas, krypton gas,
Xenon gas, helium gas, sulfur hexafluoride gas and the like can be used to further enhance the heat insulation performance and soundproofing performance.

Further, a decorative film, a conductive film or a metal mesh for electromagnetic shielding, a visibility control film, a decorative film, an outer side and / or a hollow space side of at least one glass plate.
A functional film such as a resin film coated with a special metal film or a mesh can be attached, or can be stretched and attached in a hollow space. In the case of stretching and pasting in a hollow space, a hole for communicating a hollow space isolated at a corner of a functional film or a mesh can be provided as necessary.

In addition, various blinds and various metal or resin lattices can be built in the hollow space.

[0064]

The present invention will be described below in detail with reference to examples. However, the present invention is not limited to the embodiment.

Example 1 FIG. 1 is a sectional view (partly) of an essential part of an embodiment of a double glazing 1 according to the present invention. The two glass plates 2 and 3 are 5 mm thick
The glass plate 3 is a low-emission plate glass in which a special metal film is coated on the hollow space side, and has a vertical emissivity of 0.07.

The spacer 4 has a thickness of 6 mm and a width of 8 mm
, And disposed at the peripheral edge of the glass plate. The spacer 4 is separated from a first spacer 5 having a thickness of 6 mm and a width of 4 mm, and a second spacer 6 having a thickness of 6 mm and a width of 4 mm. Two spacers 6 are arranged outside. The thickness of the hollow space is 6 mm.

The first spacer 5 is a self-adhesive string-like resin layer 7 filled with a desiccant and is made of hot melt butyl filled with 30% by weight of fine powdered zeolite 3A having a particle diameter of 100 μm or less. Was kneaded using a closed kneader, and then was 6 mm thick and 4 mm wide using an extruder.
The cross-section of a rectangular cord is extruded and can be deformed so as to conform to the shape of glass, and can maintain almost the same shape even when bent at a corner portion It has sufficient self-adhesiveness that can be temporarily fixed to the peripheral edge of the glass plate.

On the other hand, the second spacer 6 is a rigid member 8
A double-sided adhesive tape having a thickness of 0.16 mm and a width of 4 mm was provided as an adhesive layer 9 on two opposing outer surfaces of a square material made of a rigid vinyl chloride resin having a thickness of 5.68 mm and a width of 4 mm having a rectangular cross section. Things. This double-sided adhesive tape is made of an acrylic pressure-sensitive adhesive having a nonwoven fabric as a base material, and has a peel adhesive force of 1.24 kgf / 20 mm and a shear adhesive force of 6.0 kgf / cm ² . The material supplied as the second spacer 6 is a material in which the release material of the double-sided adhesive tape of the adhesive layer 9 is adhered to the rigid member 8 made of the hard vinyl chloride resin, and the release material contaminates the adhesive layer. In order to obtain a sufficient adhesive strength, it was peeled off immediately before being placed on the glass plate and immediately before the glass plates were stacked.

The second spacer 6 was divided into four so as to be disposed almost in parallel on each side of the glass plate. First, the first spacer 5 was disposed inside at a predetermined position on the peripheral edge of one glass plate 2 using a positioning jig, and the ends were joined to each other.

Next, outside the first spacer 5, 4
The second spacer 6 divided into books was disposed by peeling off the release material on one side. Next, after the release material on one side of the second spacer 6 was peeled off, the other glass plate 3 was attached and pressure-bonded to be integrated.

After disposing the first spacer 5 and the second spacer 6 formed in advance on the glass plate,
Multilayer glass could be manufactured by a simple operation of stacking glass plates.

The double-glazed glass 1 thus obtained is introduced into a heating furnace (not shown) and heated at 80 ° C. for 1 minute to simultaneously move the first spacer 5 and the second spacer 6 with the glass plates 2 and 3. It was possible to obtain the double-glazed glass 1 which was more strongly bonded and integrated. In addition, a polyester tape 13 with an adhesive was adhered over the entire periphery of the peripheral edge surface of the double-glazed glass 1 to protect the edge surface and to suppress plate slippage.

The thus obtained 350 mm × 50
The initial dew point of the 0 mm size double glazing 1
When the initial heat transfer coefficient was measured by the method specified in 3209-1995 and the method in accordance with JIS A 4710-1989, the initial dew point was -45 ° C, which cleared the JIS standard (-35 ° C or less). The initial heat transmission coefficient is 2.17 kcal / m ² h ° C. and the heat insulation performance is high.
After the S accelerated durability test class III, the dew point was -70 ° C or less and the JIS standard (-30 ° C or less) was cleared, the heat transmission coefficient was 2.17 kcal / m ² h ° C, and the heat insulation performance was high and severe. Even after the test under the conditions, it was confirmed that there was almost no decrease in the dew point performance and the heat transmission coefficient, and that the sample had sufficient durability.

A shear deformation test was conducted by the method shown in FIG. 5 in order to examine the displacement of the sheet when stored in a high-temperature atmosphere such as in summer. A double-glazed glass 1 having a size of 350 mm × 500 mm produced in the same manner was tilted with the short side horizontally and the long side at an angle of 80 °, and only one side of the glass plate 2 was supported and fixed on the support 11, and a 6 kg weight 10
The other glass 3 on which is fixed and the spacer 4 of the sealing portion are floated in a free state, and introduced into a heating furnace. After 40 minutes at 40 ° C., the amount of shear deformation of the other glass 3 floating in the free state is measured. When measured with a dial gauge 12 set on the upper side of the other glass 3, it was 0.7 mm, and it was found that shear deformation resistance was excellent.

Embodiment 2 An embodiment of the double glazing 1 according to the present invention is shown in FIG. The same two sheets of glass 2 and 3 as in Example 1 were used.

The spacer 4 has a rectangular cross section having a thickness of 6 mm and a width of 8 mm, and is disposed at the peripheral edge of the sheet glass. The spacer 4 is separated from a first spacer 5 having a thickness of 6 mm and a width of 4 mm, and a second spacer 6 having a thickness of 6 mm and a width of 4 mm. Two spacers 6 are arranged outside. The thickness of the hollow space is 6 mm.

The first spacer 5 used was the same as that used in Example 1. On the other hand, the second spacer 6 is a rectangular member made of stainless steel 304 having a thickness of 5.9 mm and a width of 4 mm and having a rectangular cross section and a thickness of 1 mm as the rigid member 8. Thickness 0.05mm, width 4
mm double-sided adhesive tape. This double-sided adhesive tape is made of an acrylic pressure-sensitive adhesive having no base material, and has a peel adhesive strength of 1.05 kgf / 20 mm and a shear adhesive strength of 55.0 kgf / cm ² .

The second spacer 6 was divided into four so as to be arranged almost in parallel on each side of the glass plate. Next, a multilayer glass 1 was manufactured using these members in a manner substantially similar to that of Example 1.

The obtained 350 mm × 50 mm
When the dew point and the heat transmission coefficient of the double glazing 1 having a size of 0 mm were measured in the same manner as in Example 1, the initial dew point was -45 ° C, which cleared the JIS standard (-35 ° C or less). 2.17 kcal / m ² h ° C, high heat insulation performance, after JIS accelerated durability test class III,
Dew point is -70 ° C or less, JIS standard (-30 ° C or less)
The heat transmission coefficient is 2.17 kcal / m ² h ° C, and the heat insulation performance is high, and even after the test under severe conditions, the dew point performance is almost unchanged, and the heat transmission coefficient does not decrease and has sufficient durability. confirmed.

When the shear deformation test was conducted in the same manner as in Example 1, the shear deformation amount was 0.0 mm, and it was found that the shear deformation resistance was excellent. Example 3 An example of the double glazing 1 according to the present invention is shown in FIG.

The same two glass plates 2 and 3 as in Example 1 were used. The spacer 4 has a rectangular cross section with a thickness of 6 mm and a width of 8 mm, and is arranged at the peripheral edge of the sheet glass. The spacer 4 is separated from a first spacer 5 having a thickness of 6 mm and a width of 4 mm, and a second spacer 6 having a thickness of 6 mm and a width of 4 mm. Two spacers 6 are arranged outside. The thickness of the hollow space is 6 mm.

As the first spacer 5, the same spacer as in Example 1 was used. On the other hand, the second spacer 6 is a channel member made of stainless steel 304 having a thickness of 5.64 mm, a width of 4 mm, a U-shaped cross section and a thickness of 1 mm as the rigid member 8, and an adhesive layer on two opposing surfaces of the outer surface. 0.17m thickness as 9
m, provided with a thermal adhesive tape having a width of 4 mm. This heat adhesive tape is made of an acrylic resin adhesive having a nonwoven fabric as a base material, and is 1 kgf / cm at 80 ° C. for 1 minute.
^When the adhesive is applied under the pressure of ^2, the peel adhesive strength is 4.
0kgf / 20mm, shear adhesive strength 30.0kgf / c
m ² .

The second spacer 6 was divided into four so as to be disposed almost in parallel on each side of the glass plate. Using each of these members, a double-glazed glass 1 was produced in substantially the same manner as in Example 1. However, a pressure of 1 kgf / cm ² was applied when heating the double glazing 1.

The thus obtained 350 mm × 50
When the dew point and the heat transmission coefficient of the double glazing 1 having a size of 0 mm were measured in the same manner as in Example 1, the initial dew point was -45 ° C, which cleared the JIS standard (-35 ° C or less). 2.17 kcal / m ² h ° C, high heat insulation performance, after JIS accelerated durability test class III,
Dew point is -70 ° C or less, JIS standard (-30 ° C or less)
The heat transmission coefficient is 2.17 kcal / m ² h ° C, and the heat insulation performance is high, and even after the test under severe conditions, the dew point performance is almost unchanged, and the heat transmission coefficient does not decrease and has sufficient durability. confirmed.

When the shear deformation test was carried out by the same method as in Example 1, the amount of shear deformation was 0.0 mm, and it was found that the shear deformation resistance was excellent.

[0086]

Comparative Example 1 A comparative example of the double glazing 1 is shown in FIG. The same two glass plates 2 and 3 as in Example 1 were used.

The spacer 4 has a rectangular cross section with a thickness of 6 mm and a width of 8 mm, and is arranged at the peripheral edge of the glass plate. The spacer 4 does not have the second spacer 6 and the first spacer
Consists of only the spacer 5 of FIG. The thickness of the hollow space is 6 mm.

The first spacer 5 is formed by embedding a continuous thin plate rigid member 8 ′ in a self-adhesive string-like resin layer 7 filled with a desiccant and having a particle size of 100 μm in hot melt butyl. The following fine powdered zeolite 3A was mixed with 30
The mixture filled with wt% was kneaded using a closed kneader, and two cords having a thickness of 6 mm and a width of 4 mm and having a rectangular cross-section were simultaneously extruded using an extruder. A 0.5 mm thick, 5.8 mm wide aluminum material separately supplied as a continuous rigid member 8 is inserted and embedded between the string-shaped ones, so that the cross section having a thickness of 6 mm and a width of 8 mm is rectangular. It is formed in a string shape, can be deformed so as to conform to the shape of the glass, and can maintain almost the same shape even when bent at the corner, and the peripheral edge of the glass plate It has sufficient self-adhesiveness that can be temporarily fixed to the part.

The first spacer 5 is provided on one glass plate 2
Was disposed at a predetermined position on the peripheral edge portion using a positioning jig. Thereafter, the other glass plate 3 was attached and pressure-bonded to be integrated with the adhesive.

The double-glazed glass 1 thus obtained is introduced into a heating furnace (not shown) and heated at 80 ° C. for 1 minute to be more strongly adhered and integrated with the glass plates 2 and 3 to obtain the double-glazed glass 1. I was able to.

The thus obtained 350 mm × 50
When the dew point and the heat transmission coefficient of the double glazing 1 having a size of 0 mm were measured in the same manner as in Example 1, the initial dew point was -45 ° C, which cleared the JIS standard (-35 ° C or less). 2.17 kcal / m ² h ° C, high heat insulation performance, after JIS accelerated durability test class III,
Dew point is -70 ° C or less, JIS standard (-30 ° C or less)
The heat transmission coefficient is 2.17 kcal / m ² h ° C, and the heat insulation performance is high, and even after the test under severe conditions, the dew point performance is almost unchanged, and the heat transmission coefficient does not decrease and has sufficient durability. confirmed.

However, when the shear deformation test was conducted in the same manner as in Example 1, it was found that the amount of shear deformation was 2.0 mm or more, and the shear deformation resistance was extremely inferior to that of the present invention.

[0093]

As described in detail above, according to the present invention,
It has excellent dew point performance and heat insulation performance, and can maintain long-term durability. In addition, even when stored in a high-temperature atmosphere such as in the summer, shearing can be suppressed. Excellent deformability can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a main part of a double glazing 1 according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part showing Example 2 of the double glazing 1 according to the present invention.

FIG. 3 is a cross-sectional view of a principal part showing Example 3 of the double glazing 1 according to the present invention.

FIG. 4 is a cross-sectional view of a principal part showing Comparative Example 1 of the double-glazed glass 1;

FIG. 5 is a side sectional view showing a shear deformation test method for a double-glazed glass.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Double glass 2 Sheet glass 3 Sheet glass (low radiation glass) 4 Spacer 5 First spacer 6 Second spacer 7 Resin layer with self-adhesion filled with desiccant 8 Rigid member 8 'Thin rigid member 9 Adhesive layer DESCRIPTION OF SYMBOLS 10 Weight 11 Support base 12 Dial gauge 13 Tape with adhesive

Claims (8)

[Claims] 1. A multilayer structure in which a sealed hollow space is formed by arranging two glass plates at a predetermined interval and arranging a spacer for maintaining the interval at a peripheral edge of the panel. In glass, the spacer comprises at least two layers of a first spacer and a second spacer,
The first spacer is made of a self-adhesive string-like resin layer filled with a desiccant, the second spacer is made of a rigid member having an adhesive layer, and the first spacer is placed inside. With the second spacer outside,
Double glazing characterized in that each spacer is provided. 2. The double-glazed glass according to claim 1, wherein the second spacer is a rigid member of any one of hard resin, metal / alloy, and ceramics. 3. The cross-sectional shape of the second spacer is a substantially rectangular solid body, a substantially rectangular hollow body,
The double-glazed glass according to claim 1, which is any rigid member having an opening such as a king or a concave shape. 4. The method according to claim 1, wherein the adhesive layer of the second spacer is provided on at least two opposing surfaces of the outer surface of the rigid member which are adhered to glass. Double glazing. 5. The double glazing according to claim 1, wherein the adhesive layer of the second spacer is a double-sided adhesive tape or a thermal adhesive tape. 6. The device according to claim 1, wherein the first spacer is provided over the entire periphery of the peripheral edge, and the second spacer is provided over the entire periphery of the peripheral edge, or substantially over the entire periphery. The double-glazed glass according to any one of claims 1 to 5, wherein 7. The double-glazed glass according to claim 1, wherein a tape is adhered over a part or the entire circumference of the peripheral end surface. 8. A double glazing in which a sealed hollow space is formed by arranging two glass plates at a predetermined interval and arranging a spacer for maintaining the interval at a peripheral edge of the panel. In the manufacturing method, the spacer comprises at least two layers of a first spacer and a second spacer, and comprises a self-adhesive string-shaped resin layer filled with a desiccant as the first spacer. And then
The second spacer is made of a rigid member having an adhesive layer as the outer side, and is attached to the peripheral edge of one glass plate or slightly inside thereof, and then the other glass plate is attached and crimped thereon, A method for producing a double-glazed glass, comprising bonding and integrating with two glass plates.