JP2000104458A - Double glazing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower the cost by forming a spacer for double glazing of the wooden material provided with the adhesive agent in the peripheral part thereof, and sealing the outside with the self-adhesive resin layer. SOLUTION: A drying agent 5 such as zeolite is attached to the peripheral part of a spacer 4 having a rectangular cross section and made of the wooden material such as balsa material by a pressure sensitive adhesive double coated tape 6. After adhering the spacer 4 to a plate glass 1 at the predetermined position by the pressure sensitive adhesive double coated tape 6', the other glass 2 is similarly adhered to the spacer 4 for pairing. An outside space of the spacer 4 for the paired glass 2, 3 is filled with the sealing material 7 such as hot melt butyl so as to form a dual seal type double glazing 1. With this structure, cost can be lowered, and excellent dew-point performance and the heat insulating performance can be secured.

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 heat insulation performance, and is used in the field of construction such as housing and non-housing, and in automobiles and automobiles.
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 a hollow cylindrical body made of aluminum filled with a desiccant as disclosed in JP-A-59-45149. This cylindrical aluminum spacer is cut into a predetermined size in advance, and after filling a hollow portion with a desiccant, each end is joined using a corner connection key to be assembled into a frame, or to a predetermined shape. After being bent and joined to the frame by joining the ends using a connection key, the hollow portion is filled with a desiccant. Next, a butyl rubber-based sealing material was applied as a primary sealing material to two surfaces of the cylindrical aluminum spacer frame bonded to the glass, and this was affixed slightly inside the peripheral edge of one of the plate glasses. After that, the other glass is pasted on it, pressed and bonded, and integrated with each other to form a hollow space with the two glass sheets and the spacer. Then, the outer cross section is formed into an open concave space having a substantially U-shaped cross section. 2
The so-called dual-seal double-layer glass, which is coated and filled with liquid polysulfide-based, silicone-based, and polyurethane-based resin as the next sealing material, is cured at around room temperature, and is firmly bonded and integrated with the plate glass,
The most common one.

For example, Japanese Patent Publication No. Sho 63-50508 and Japanese Patent Application Laid-Open No. Hei 6-123191 disclose a continuous rigid spacer, for example, a corrugated aluminum plate, in a self-adhesive resin layer filled with a desiccant. After affixing a string-like material with embedded etc. slightly inside the peripheral edge of one sheet glass, the other sheet glass is stuck on it and pressure bonded, integrated with adhesive, two sheets of glass and a spacer A so-called single-seal double-layer glass in which a sealed hollow space is formed is described, and some of the double-layer glasses are currently used.

For example, Japanese Patent Application Laid-Open No. 7-291677 discloses that
Addition-reaction-type bonding in which a bonding member is adhered around the periphery of a glass plate in a multi-layer glass in which a plurality of glass plates are polymerized and integrated by a bonding member with a gas layer interposed between parallel glass plates It is made of an elastic body provided with layers on both sides, and is pressed against the addition reaction type adhesive layer and glass with a reaction catalyst layer interposed,
The addition reaction type adhesive layer and the curing reaction are integrated,
The joining member is provided with a concave groove, and the outer peripheral surface of the joining member is covered with a foil-like gas barrier material such as a metal foil including the concave groove by joining or drawing, and the concave groove is filled with a hygroscopic agent and provided. A double-glazed glass characterized in that the penetration of water molecules is prevented by bonding a glass plate with a foil-like gas barrier material such as a metal foil using a low-melting metal.

For example, Japanese Patent Application Laid-Open No. 9-77536 discloses that
Two or more glass plates are arranged to face each other via a resin spacer so as to form a hollow layer, and a concave portion is formed at a peripheral portion of the glass plate and an outer peripheral portion of the spacer, and the concave portion is filled with a sealing material. In the double glazing, the sealing material is 60
A double glazing characterized by exhibiting fluidity at a temperature of not less than 0 ° C. and comprising a thermoplastic resin having a JISA hardness of 25 to less than 70 at 25 ° C. is described.

For example, Japanese Patent Application Laid-Open No. 4-250285 discloses that
In a double glazing in which a sealed hollow space is formed by arranging two sheet glasses at a predetermined interval and arranging a spacer for maintaining the interval at a peripheral edge of the panel, the spacer has a cross section. The opening of a U-shaped rigid isolating member made of a metal such as stainless steel 304 or made of glass fiber reinforced plastic coated with a gas and moisture impermeable film faces the hollow space side, and has a central bottom portion. Filled with desiccant inside, for example, polyurethane,
A moisture permeable resin layer such as silicone is applied and arranged, and as a primary sealing material on an outer portion to be adhesively bonded to glass,
For example, a moisture-impermeable adhesive type sealing material such as polyisobutylene is applied, and this is attached to the inside of the peripheral edge of one of the sheet glasses, and then the other glass is attached thereon. Compression bonding, adhesion and integration, forming a hollow space with two sheets of glass and spacers, and then as a secondary sealing material in the open concave space with a substantially U-shaped outer cross section, as a structural adhesive type sealing A so-called dual-seal double-glazing system provided with a material is described. Practically, as a structural adhesive type sealing material, for example, a liquid polysulfide-based, silicone-based, or polyurethane-based resin is applied and filled, and cured at a temperature around room temperature, and at the same time, is firmly bonded and integrated with a sheet glass.

[0008]

However, the double glazing using a cylindrical aluminum spacer described in, for example, JP-A-59-45149 described above has a high thermal conductivity of aluminum and a high heat insulating performance. Not only inevitably decreases in the peripheral part, but also aluminum is a problem from the viewpoint of energy saving because a large amount of electric power is used in the process from bauxite, which is a raw material, to raw material.

Further, for example, the double-glazing described in JP-B-63-50508 and JP-A-6-123191 comprises a continuous rigid spacer in a self-adhesive resin layer filled with a desiccant. For example, a structure in which a corrugated aluminum plate is buried has a problem from the viewpoint of not only lowering the heat insulation performance but also energy saving.

[0010] For example, in the double-glazing described in Japanese Patent Application Laid-Open No. 7-291677, the reaction catalyst layer is separated from the release / carrier sheet and transferred onto the bonding-facing surface of the glass plate, and an elastic body as a bonding member is formed. The adhesive layer is pressed into contact with the additional reaction type adhesive layer provided on both sides to integrate the curing reaction.The reaction catalyst layer as the curing agent and the additional reaction type adhesive layer as the main agent are separated from each other. The process of releasing and transferring from the carrier sheet to each of the two glass plates is complicated, and the outer peripheral surface of the joining member is covered and joined with a foil-like gas barrier material such as a metal foil including a concave groove. Alternatively, the process of drawing is also complicated, and a process of applying a low-melting metal layer to the glass contact surface of a foil-like gas barrier material such as a metal foil, and melting and heating after assembling and setting to bond and integrate. Also A miscellaneous.

[0011] 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. In a double-layer glass in which a recess is formed at the portion and the outer peripheral portion of the spacer and the recess is filled with a sealing material, the sealing material exhibits fluidity at a temperature of 60 ° C. or more,
And, at 25 ° C., the JISA hardness is made of a thermoplastic resin having a hardness of 25 or more and less than 70, the thermoplastic resin is heated and melted to show fluidity, and the step of filling the concave portion using an extruder or the like includes: Since a precise control device is required for quantitative supply without excess or shortage, 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.

For example, in the double glazing disclosed in Japanese Patent Application Laid-Open No. 4-250285, the spacer is such that the opening of the rigid isolation member having a U-shaped cross section faces the hollow space side and the spacer is dried inside the central bottom. Coating and disposing a moisture permeable resin layer filled with an agent,
In addition, a moisture-impermeable adhesive-type sealing material is applied as a primary sealing material to an outer portion that adheres to the glass, so that not only the heat insulation performance is reduced but also the cost is inevitably increased.

The present invention has been made in view of the above-mentioned conventional problems. Since the wooden material is used as the spacer, the cost can be reduced, and there is no problem in terms of energy saving. It is an object of the present invention to provide a double glazing having a sufficiently high strength.

[0014]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method in which two glass sheets are spaced at a predetermined distance, and a spacer for maintaining the distance is provided at a peripheral edge of the panel. In the double-layer glass in which a sealed hollow space is formed by disposing the spacer, the spacer is made of a wood material having a desiccant adhered to a peripheral portion, and a resin layer having a self-adhesive property is formed outside the spacer. It is characterized by being sealed by

In the present invention, since the wood material is used as the spacer, the cost can be reduced, and there is no problem from the viewpoint of energy saving. By combining with the sealing material which is a self-adhesive resin layer, the mechanical property can be improved. The strength can be maintained, and the sealing performance can be maintained.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Two sheets of glass are clear float glass, heat-absorbing glass, heat-reflecting glass, high-performance heat-reflecting glass, wire-in glass, net-in glass, template glass, tempered glass, and 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, low Various types of sheet glass, such as expanded sheet glass (including borosilicate glass) and low melting point sheet glass, can be appropriately combined. At least one of these sheet glass sheets is a low-emission sheet glass coated with a special metal film, or a special metal film is coated. Low with resin film stuck It is preferable to employ a radiation plate glass.

More preferably, the low emissivity glass sheet has a vertical emissivity of not more than 0.20, preferably not more than 0.20 according to JIS R 3106-1985 (test 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 sheets is usually 1.
A glass having a thickness of 9 mm or more is used. In the case of tempered glass, especially 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 addition to plate glass having a smooth surface, a double-layer glass can be produced relatively easily also for a plate glass such as a template glass, a fusion glass, a printed glass, a stained glass, etc., in which the hollow space side is subjected to unevenness processing. be able to.

Although two sheets of glass are used in the embodiment, three or more sheets of glass may be combined at intervals. 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 interval between the two sheet glasses is 2 mm or more,
It is 9 mm or less, preferably 4 mm or more and 25 mm or less. Even when three or more plate glasses are used in combination, the respective intervals are similarly 2 mm or more and 29 mm or less, preferably 4 mm or more and 25 mm or less.

The spacer is made of a wood material having a desiccant adhered to the periphery. As the wood material, balsa wood is light in weight and has good workability, so that it can be used particularly preferably. Wood materials used for building materials, such as pine, pine, nara, beech, cypress, and karin, may also be used. Also,
It is particularly preferable to use a woody material managed in a dry state.

The desiccant to be attached to the periphery of the spacer is silica gel, sintered silica, activated carbon, activated alumina,
Anhydrous calcium sulfate, zeolite (3A, 4A, 5A,
13X) and at least 20 g per m2 of the double glazing. The shape of the desiccant is in the form of fine powder, granule, or rod, and is not particularly limited.However, in order to adhere to the spacer, there is a problem that the fine powder is easily scattered and has a small amount of adhesion. However, stick-shaped ones are sometimes difficult to adhere, and granular ones are preferred because they are easily adhered. The particle size (diameter) of the granular desiccant is 0.8 to 2.
0 mm, preferably 1.0 to 1.5 mm.

When the desiccant is attached to the spacer, as shown in the examples described below, if the desiccant is attached to the outside of the wooden spacer and the inside of the sealing material, it is attached to a sash or the like with the grain of the wooden spacer exposed. Although it is preferable from the viewpoint of aesthetics, it is needless to say that the wooden spacer may be attached to the inside of the wooden spacer, or the wooden spacer may be formed into a concave shape and attached to the groove. When the desiccant is attached to the outside of the wooden spacer and the inside of the sealing material, the moisture in the hollow space is adsorbed to the desiccant by the respiration of the wooden spacer itself.
Since the double-sided adhesive tape itself has moisture permeability, it is also absorbed by the tape itself. Furthermore, with double-sided adhesive tape,
Since an air layer is usually interposed between the glass or wood spacers, moisture is also adsorbed by the desiccant by this air layer.

Further, the adhesion between the wooden spacer and the glass,
For the adhesion between the wood spacer and the desiccant, a double-sided adhesive tape is preferable because of easy handling, but other various adhesives and adhesive sheets can also be used.

The self-adhesive resin (including rubber and elastomer) as a sealing material includes polyisobutylene (including reactive polyisobutylene), butyl rubber (including unvulcanized butyl rubber and partially vulcanized butyl rubber), and polybutylene. Any resin such as a copolymer containing isobutylene as one component, hot melt butyl (including commercially available compounds such as Yokohama Rubber M-145 and M-120, and Kanebo NSC 88-7500) is used. Including, if necessary, as a tackifier, an aliphatic hydrocarbon resin, an aromatic hydrocarbon resin, an alicyclic hydrocarbon resin, a hydrogenated alicyclic hydrocarbon resin, a terpene resin, a cumarone resin, By adding polybutene, polybutadiene, polyisobutylene, etc. as plasticizers such as rosin derivatives, more self-adhesiveness and flexibility were developed. Than it is.

In the sealing material, various fillers can be used, for example, silica gel, sintered silica, activated carbon, activated alumina, anhydrous calcium sulfate,
Desiccants such as zeolites (3A, 4A, 5A, 13X), natural mica such as muscovite and phlogopite, synthetic mica, graphite, glass flake, ferrite, clay, talc, hillite, smectite, magnesium silicate, stainless flake, Flake-like filler such as 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, Particle fillers such as carbon black and white carbon, and fibrous fillers such as glass fiber, carbon fiber, and aramid fiber can be used, and various types of fibers are processed, for example, strings, ropes, and felts of bundled fibers. , Non-woven fabric, woven fabric or knitted fabric Can be used workpiece as a core material, optionally in addition to further previously described,
Flame retardants, adhesion improvers such as silane-, titanate-, and aluminum-based coupling agents; thixotropy-imparting agents such as bentonite, organic bentonite, montmorillonite, ultrafine silica, ultrafine titania, and ultrafine alumina; methylcellulose A thickener such as methyl cellulose sodium salt, magnesium oxide, and magnesium hydroxide can be appropriately added. These fillers contain 0 to 60 wt%, preferably 0 to 50 wt%.

For the sealing material, for example, after using a kneading machine such as a kneader, various compounding compositions such as a resin, a curing agent, and a filler are charged and kneaded, a cross section is formed from a die using an extrusion molding machine or the like. For example, a deformable string-shaped sealing material can be formed by extruding one string-shaped material having a substantially rectangular shape.

Further, two cords having a substantially rectangular cross section, for example, are extruded simultaneously from a die by using an extruder or the like, and a continuous feed is supplied separately between the two cords. By inserting the rigid member, the string-shaped sealing material in which the rigid member is embedded can be formed.

However, when a fiber material, such as a string, a rope, a felt, a nonwoven fabric, a woven fabric or a knitted fabric, obtained by processing various fibers as a filler, such as a bundle of fibers, is used as a core material, a kneading machine is used. After mixing and kneading various compounding compositions such as resin, hardener, filler (excluding fiber processing material), the obtained kneaded material is impregnated into the fiber processing material, and a string-like cross section with a substantially rectangular cross section is obtained. Thus, a string-shaped sealing material having a fiber material as a core material can be formed.

In addition, the sealing material formed in the form of a string has to be carefully designed so that the adhesive surface is not contaminated. Therefore, when the sealing material is used after a certain period of time has passed after the molding, the adhesive surface becomes contaminated. In order not to be adhered, for example, polyethylene, polypropylene, polytetrafluoroethylene, a film or sheet such as polyester such as polyethylene terephthalate, more preferably a release substrate such as kraft paper or a film or sheet coated with a silicone release agent It is preferable that the storage be performed after the storage.

The string-shaped sealing material can be disposed on the glass outside the spacer made of a wood material. Also, the sealing material is not used in the form of a pre-formed string, for example, using a kneading machine such as a kneader, a resin, a curing agent, a mixture obtained by mixing and kneading various compounding compositions such as fillers. If necessary, the resin is fed under pressure in a heated and melted state, and is discharged and applied by an applicator, so that it can be filled and poured outside the spacer made of a wood material.

Also, since the sealing material has self-adhesiveness,
After forming the double-glazed glass, if the exposed outer tack becomes a problem in handling the double-glazed glass, by attaching powder to the outside of the sealing material, the tack is eliminated,
It can be easy to handle.

Further, by attaching a tape over a part or the entire periphery of the peripheral edge of the double-layer glass, the edge of the glass can be protected. As this tape, other than general vinyl resin tape, polyester resin,
Plastic films such as fluorine resin and silicone resin, metal foils such as aluminum foil and stainless steel foil and laminated films obtained by laminating them, plastic films deposited with metal such as aluminum, and soft metal sheets such as lead and zinc Tapes in which an adhesive is applied to one surface of various films and sheets can be used.

Further, a glazing channel made of resin can be provided over substantially 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 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.

Further, various blinds or various metal or resin lattices can be built in the hollow space.

[0038]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. 1 and 2 are cross-sectional views (parts) of a main part showing the first embodiment and the embodiment, respectively.

Example 1 An example of a double glazing 1 in which a spacer made of a wood-based material is disposed inside a sealing material based on FIG.

The two glass sheets 2 and 3 are 1000 mm × 1
Float glass sheet of 000 mm × 3 mm size, one of the glass sheets 3 is a low radiation glass sheet having a special metal film coated on the hollow space side, and the vertical emissivity is 0.07.

The spacer 4 is made of a balsa material having a square cross section having a height and a width of 6 mm, and a zeolite 3A having a particle size of about 1 mm is applied as a drying agent 5 to the outer periphery with a double-sided adhesive tape 6.

The spacer 4 is adhered to a position 10 mm away from the edge of one of the glass sheets with a double-sided adhesive tape 6 ', and then the other glass sheet is overlaid, pressed and paired.

Next, hot melt butyl (for example, Yokohama Rubber M-1) is used as a sealing material 7 in an outer space of the paired glass spacer 4 using an applicator.
45) to obtain a dual-sealed double-glazing unit 1.

The dew condensation state of the peripheral portion of the thus obtained double glazing was visually observed under the conditions of an outdoor temperature of −5 ° C., an outdoor temperature of 20 ° C., and a relative humidity of 50% using a thermal conductivity tester. As a result of observation, no dew condensation occurred.

Comparative Example A zeolite 3A having a particle size of about 1 mm was filled as a desiccant at a position 10 mm from an end of a 1000 mm × 1000 mm × 3 mm size float plate glass into a float plate glass having a height of 5.5 mm and a width of 7 mm. A rod-shaped aluminum spacer was bonded with butyl rubber.

Next, the same size float glass sheets are laminated and then pressed, and the space outside the aluminum spacer is filled with a polysulfide resin using an applicator to form a dual-sealing double layer having a closed hollow layer. A glass was obtained.

The double-glazed glass thus obtained is the most widely used double-glazed glass. Using a thermal conductivity tester, an outdoor temperature of −5 ° C., an outdoor temperature of 20 ° C., and a relative temperature of indoor are measured. As a result of visually observing the dew condensation state of the peripheral portion under the condition of a humidity of 50%, dew was found to have occurred.

[0048]

As described in detail above, according to the present invention,
The dew point performance and the heat insulation performance are excellent, the cost can be reduced, and there is no problem in terms of energy saving.

[Brief description of the drawings]

FIG. 1 is a perspective view of an essential part showing an embodiment of a double glazing 1 of the present invention.

FIG. 2 is an exploded perspective view (partly) showing a spacer portion of the double-glazed glass 1 according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Double glass 2 Sheet glass 3 Sheet glass (low radiation glass) 4 Spacer 5 Desiccant 6, 6 'Double-sided adhesive tape 7 Sealing material

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akira Sakata 1510 Oguchi-cho, Matsusaka-shi, Mie Central Glass Research Laboratory (72) Inventor Hiromi Hase 1510 Oguchi-cho, Matsusaka-shi, Mie Central Glass Research Co., Ltd. In-house F-term (reference) 2E016 BA01 CA01 CB00 CB01 CB02 CB04 CC02 EA02 EA05 FA01 FA02 4G061 AA10 AA13 AA18 BA01 BA02 BA10 CB02 CB17 CD02 CD22 CD25

Claims (1)

[Claims] 1. A method for separating two glass sheets at a predetermined interval,
In a double glazing in which a sealed hollow space is formed by arranging spacers for maintaining the spacing at the peripheral edge of the panel, the spacers are made of a wood material having a desiccant attached to the periphery. Further, a double-layer glass characterized by sealing the outside of the spacer with a resin layer having self-adhesiveness.