JPH1121149A - Low-pressure double layer glass panel and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-pressure double layer glass panel which has excellent adiabatic performance and is capable of maintaining longterm durability and a process for manufacturing this panel. SOLUTION: A sealing material comprises first sealing materials 4, 5 consisting of a low melting solder alloy having a m.p. below 200 deg.C and a second sealing material 7 mainly consisting of an org. high-polymer material disposed at the outer peripheral edge of the first sealing material. The process for manufacture consists in previously preparing two sheets of sheet glass fused with the low melting solder all over the entire peripheral of the respective peripheral end edges, disposing a spacer on the one sheet glass, disposing the second sealing material consisting of the highpolymer material in this state at the edges outer than the low melting solder alloy in such a manner that at least part thereof is made to remain as an opening, superposing the other sheet glass thereon, introducing the sheet glass into a reduced pressure chamber and reducing the space part to a prescribed pressure, the heat treating the entire peripheral part of the laminate and bonding two sheets of the sheet glass by the first and second sealing materials.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to energy saving in the fields of construction such as housing and non-housing, transportation such as automobiles, vehicles, ships, and aircraft, and equipment such as freezers, freezer showcases, and constant temperature and humidity chambers. The present invention relates to a low-pressure double-glazed glass panel having high heat insulation performance applied to an opening that requires a high temperature and a method for manufacturing the same.

[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.

As this double-glazed glass panel, there has been proposed a double-glazed glass panel in which a space formed by facing glass sheets is reduced in pressure. For example, Japanese Unexamined Patent Publication No. 5-501896 discloses that two low-pressure spaces are interconnected by a peripheral joint of molten solder glass and a plurality of columns arranged with an outer coating of molten solder glass. Insulated glass panels composed of sheet glass have been proposed.

For example, Japanese Patent Publication No. Hei 7-508967 discloses that
It consists of two spaced apart glass panes enclosing a low-pressure space and joined together by an array of peripheral joints and columns of fused solder glass, and at least some of these columns are made entirely of metal. Certain thermally insulating glass panels have been proposed.

For example, Japanese Patent Application Laid-Open No. 6-17579 discloses that
Parallel plates made of two glass sheets are spaced at a predetermined interval,
A spacer made of low-melting glass or porcelain that maintains this space is fused and disposed with low-melting glass, and the end of the parallel plate is a low-melting material, for example,
A vacuum heat insulating glass plate has been proposed in which a low-melting glass or a low-melting alloy is fused and adhered to form a vacuum space.

For example, Japanese Patent Application Laid-Open No. Hei 8-133795 discloses that
There has been proposed a composite glass plate having a structure in which a sheet glass provided with projections having a constant height is overlapped on a surface having projections, an outer peripheral portion is airtightly bonded with an adhesive to form a space, and the space is evacuated.

[0007]

For example, in the above-mentioned insulated glass panel disclosed in Japanese Patent Publication No. 5-501896, the peripheral edge of the glass is sealed with molten solder glass. The chemical durability is inferior as pointed out in 6-17579, so it is difficult to use in architectural applications immersed in rainwater such as acid rain, which has become a problem in recent years as a cause of environmental destruction. . Further, since the molten solder glass and the sheet glass have different coefficients of thermal expansion, breakage due to generation of thermal stress becomes a problem in a hot summer environment or a high temperature environment of an environmental tester. Further, a method of sealing the peripheral edge of the glass with the molten solder glass and a method of connecting the two glass sheets to each other with a plurality of columns coated with the molten solder glass are pointed out in Japanese Patent Publication No. Hei 7-508967. At the time of panel manufacture, the strut is damaged by the atmospheric pressure,
Molten solder glass, which is a brittle material, cannot absorb impact loads caused by earthquakes, winds, etc., and is therefore difficult to use for architectural and vehicle applications. In addition, since the gas exhaust means includes a complicated process of processing an exhaust port or the like into glass, the cost is high.

For example, in the heat insulating glass panel described in Japanese Patent Application Laid-Open No. 7-508967, at least some of the columns in the heat insulating glass panel described in Japanese Patent Application Laid-Open No. 7-508967 are completely made of metal. By doing so, improvements have been made to prevent the columns from being damaged by atmospheric pressure during panel manufacturing, to absorb impact loads due to earthquakes, winds, and the like, and to prevent damage due to the generation of thermal stress. However, there is no change or improvement in sealing the peripheral edge of the glass with molten solder glass, so the problem of poor chemical durability remains, so buildings that are immersed in rainwater such as acid rain It is difficult to adopt for use.

[0009] In an extremely hot summer environment or a high-temperature environment of an environmental tester, breakage due to generation of thermal stress still remains as a problem. Also, for example, in the vacuum insulating glass described in JP-A-6-17579, when the glass peripheral edge is sealed with molten solder glass, the molten solder glass is chemically coated with a low-melting alloy having weather resistance. Attempts to solve the problem of poor thermal endurance, sealing the peripheral edge of the glass with molten solder glass, and fusing a spacer made of low melting point glass or ceramic with low melting point glass. No change or improvement has been made in the method of connecting two sheets of glass, so as pointed out in Japanese Patent Publication No. Hei 7-508967, columns are damaged by atmospheric pressure during panel manufacturing, or brittle materials are used. However, there remains a problem that the molten solder glass cannot absorb an impact load due to an earthquake, wind, or the like.

[0010] For example, in the vacuum composite glass plate described in JP-A-8-133795, glass spheres are scattered as spacers, but since the distance between the glass spheres is not controlled, the density of the glass spheres is reduced. At lower parts, the glass sheet may come into contact or break. In addition, as the adhesive for sealing the peripheral edge, glass with a lower melting point than plate glass or spacers is used, but as mentioned above, it has poor chemical durability, so it is immersed in rainwater such as acid rain. In addition, it is difficult to use it for architectural applications, and in hot summer environments or high-temperature environments of environmental test equipment, damage due to the generation of thermal stress is also a problem.

Further, it is described that, instead of the spacers, a sheet glass provided with projections having a constant height is overlapped on the surface having the projections, and the outer periphery is hermetically bonded with an adhesive to form a space. There is no specific description about the arrangement method or the like.

Further, in a low-pressure double-pane glass panel in which the peripheral edge is sealed with molten solder glass, it is necessary to heat at a temperature higher than the melting point of the solder at the time of sealing, for example, at 250 ° C. or higher.
In order to further improve the heat insulation performance, for example, when using a low radiation plate glass in which one of the plate glasses is coated with a laminated film of Ag and ZnO by a sputtering method, the special metal film is exposed to a high temperature, and the film is damaged. Or impair the heat insulation performance.

In most prior arts, in order to reduce the pressure in the space of the laminate, an exhaust pipe-shaped tube is buried in a sealing portion, and the pressure is reduced from the tube portion. Therefore, there is a drawback that the process is complicated, the portion may be damaged if the protection is not sufficiently provided, and the portion remains after completion, resulting in poor appearance.

The present invention has been made in view of the above points, and a special metal film formed by a sputtering method having a low vertical emissivity can be adopted as a coating film of a low radiation plate glass. The use of a low-pressure double-glazed glass panel and a pipe-shaped tube that can maintain long-term durability while eliminating the need for a pipe-like tube, and the trace of the exhaust port is completely unknown, and An object is to provide a manufacturing method which is easy to process.

[0015]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a low-pressure double-glazed glass panel according to the present invention is provided in which two glass sheets are spaced at a predetermined interval, and a point-like, line-shaped line for maintaining the interval is provided. In a low-pressure double-glazed glass panel in which a low-pressure space is formed by disposing spacers or mesh-like spacers and sealing the ends of two glass sheets with a sealing material, the sealing material has a melting point of 200. A first sealing material made of a low-melting-point solder alloy having a temperature of not more than 0 ° C. and disposed on an outer peripheral edge of the first sealing material;
It is characterized by being constituted by a second sealing material mainly composed of an organic polymer material, and further, for example, as a hot melt butyl as a base material of the second sealing material, Kanebo NSC Co., Ltd. In the case of using 88-7500 made by the company, it is not always necessary to fill the adsorbent, but if it is used as it is, for example, M145 made by Yokohama Rubber, gas or low molecular weight material permeates into the low pressure space. Or, if released, silica gel, activated carbon, activated clay, which adsorb these gases or low molecular weight substances,
It is preferable to fill an adsorbent such as zeolite and an oxygen adsorbent in a proportion of 60% by weight or less, preferably 50% by weight or less.

When a metal core is buried in the second sealing material at the peripheral edge of the panel, workability is improved. Therefore, the low-pressure double-glazed glass panel of the present invention is preferably used as a sealing material. A first sealing material made of a low melting point solder alloy having a melting point of 200 ° C. or less, and a second sealing material mainly composed of an organic polymer material, which is disposed on the outer periphery of the first sealing material. As a result, the low-melting point solder alloy as the first sealing material firmly adheres the two sheets of glass and further improves the adhesion, and as the second sealing material,
By using a sealing material mainly composed of an organic polymer-based material, double sealing is achieved, and the adhesion is further improved. It is not eroded even when immersed in rainwater or acidic outer wall cleaners and window cleaners as described above, so that it can be used for architectural uses and transport uses such as vehicles.

Further, since the sealing material made of an organic polymer material has viscoelastic properties, the thermal stress generated in a hot summer environment or a high temperature environment of an environmental tester is small, and a brittle material generating a large thermal stress is used. Unlike molten solder glass, it is not damaged at the sealing part, so it can be used for architectural uses, transportation uses such as vehicles, and equipment use such as environmental testing machines.

Furthermore, since the sealing material mainly composed of an organic polymer material has viscoelastic absorption characteristics, it can absorb repeated impact loads due to earthquakes, winds, and the like. It can also be used for transportation applications such as vehicles.

When a low melting point solder alloy as a first sealing material is soldered to the peripheral edge of the sheet glass, 200
When the peripheral edge is sealed with a sealing material mainly composed of an organic polymer material, which is a second sealing material, the heating is completed at 150 ° C. at most.
Since the heating can be performed up to the extent, a low radiation plate glass in which one of the plates is coated with a special metal film formed by a sputtering method having a low vertical emissivity can be used, so that the heat insulating performance can be further improved.

As a method of producing such a low-pressure double-glazing, a low-melting-point solder alloy having a melting point of 200 ° C. or less is formed in advance over the entire periphery of each peripheral edge.
A sheet of glass is prepared, and a spacer is disposed on one of the glass sheets, and the outer periphery of the low melting point solder alloy formed on the periphery of the glass sheet is mainly made of a polymer material thicker than the target gap. A second sealing material is disposed so as to form an opening except for at least a part thereof, and then the other sheet glass is laminated to form a laminate, and the laminate is introduced into a decompression chamber, and a space is defined by a predetermined amount. After the pressure is reduced to a pressure of 2, the opening is pressed by a pressing tool at the portion where the opening is located, or a sealing material is filled from a tube filled with a second sealing material disposed on the front surface of the opening. It is discharged and closed, and then at least the entire periphery of the laminate is subjected to a heat treatment, and a first sealing material made of a low-melting-point solder alloy mounted on two sheets of glass and a second sealing material made of an organic polymer material are used. Two boards depending on the sealing material It is obtained so as to adhere the lath.

It is difficult to solder the low melting point solder alloy to the sheet glass because there is almost no oxygen in the decompression chamber. It is necessary to keep.

Further, an opening is formed by the second sealing material, and the opening is closed only by pressing the laminate or discharging the same sealing material from a tube or the like. This is not necessary, and the trace of the exhaust port can not be seen at all. Not only is processing easy, but also the laminate is closed by the opening, and the laminate is pressed by the atmospheric pressure. In particular, the adhesion of the second sealing material is further improved.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Two sheets of glass are clear float glass, heat absorbing glass, heat reflecting glass, high-performance heat reflecting glass, wire filled glass, net filled glass, template glass, tempered glass, and double-strength glass. Various types of plate glass such as low reflection plate glass, high transmission plate glass, frosted glass, tapesti (frost) glass, ceramics printed glass, laminated glass can be appropriately combined. At least one of these various plate glasses is coated with a special metal film. It is preferable to use a radiation plate glass because the heat insulation performance is improved. In this case, a coating film formed by a sputtering method having a relatively low vertical emissivity or a coating film formed by a sputtering method having a relatively low vertical emissivity is employed in the present invention. can do. Further, the low-emissivity glass sheet may be a glass having a vertical emissivity of 0.20 or less, preferably 0.10 or less, as defined in JIS R3106-1985 (Testing method for transmittance, reflectance and solar heat gain of the glass sheet). Two or more glasses or a glass having a vertical emissivity of 0.35 or less, preferably 0.25 or less
It was used. The thickness of the two glass sheets is usually
Both have a size of 1.9 mm or more. However, in the case of tempered glass, especially in the case of chemically strengthened glass, etc., it is not limited thereto, and a size of 1.9 mm or less can be used.

The point material, wire material or net material spacer material for maintaining the interval between the two sheet glasses is not particularly limited as long as it has a lower hardness than glass and has an appropriate compressive strength. Metals, alloys, steels, ceramics or plastics are preferred. Iron in metal,
Copper, aluminum, tungsten, nickel, chrome,
For alloys such as titanium and steel, carbon steel, chrome steel, nickel steel, stainless steel, nickel chrome steel, manganese steel,
Chrome manganese steel, chromium molybdenum steel, silicon steel, brass, solder, nichrome, duralumin and the like are used. The point material spacers are arranged in, for example, a lattice shape in a spherical shape, a column shape, a prism shape, or the like.

The wire spacer has a cross section of a circle, a semicircle, a square, or the like, and there are linear and curved shapes, and a square spacer, a rhombus, or the like is used as the mesh spacer. In the case where a metal or alloy is coated with ceramics or plastic, the design can be improved by coloring, and the reflection characteristic of the metal can be suppressed.

The spacing between the dot-like, linear or net-like spacers is 100 mm or less, preferably 75 mm or less.
The arrangement of these spacers may be regular or irregular as long as it is within the range of the arrangement interval.

The distance between the two glass sheets is 0.05 mm or more and 2.0 mm or less, and 0.1 mm or more and 1.0 mm or more.
The following is preferred. The sealing material used for the peripheral edge of this panel is Bi (34 to 53% by weight)-as the first sealing material.
Sn (36 to 54% by weight) -Sb (1 to 3% by weight) -Z
n (10% by weight) solder alloy (melting point 150 ° C. to 18
0 ° C), Bi (43.2% by weight) -Pb (25.7% by weight) -Sn (13.1% by weight) -Sb (8% by weight) -Z
n (10% by weight) solder alloy (melting point: 110 ° C to 20 ° C)
0 ° C), Bi (40-65% by weight) -Pb (25-50
Wt%)-Zn (10 wt%) solder alloy (melting point 1
30 ° C to 160 ° C), Bi (44 to 47% by weight) -Pb
(29 to 31% by weight) -Sn (12 to 14% by weight) -S
An alloy such as a b (1% by weight) -Zn (10% by weight) -based solder alloy (melting point: 110 ° C. to 130 ° C.) can be suitably used. Therefore, the two glass sheets are soldered in the atmosphere in advance.

As the second sealing material, a sealing material mainly composed of an organic polymer material is used. The organic polymer-based material has a moisture permeability (JIS Z0208-197) as a base material.
2.0 g / m ² · 24 h (40 ° C., 90% RH) based on the moisture permeability test method of the moisture-proof packaging material specified in 6.
Hereinafter, nitrogen permeability (based on a plastic film for food packaging specified in JIS Z1707-1975)
Is 1 × 10 ^-6 cm ³ · cm / cm ² · sec · atm (2
5 ° C.) or less, and the oxygen permeability is (JIS Z1707-19)
1 × 10 ^-5 cm ³ · cm / cm ² · sec · at
m (25 ° C.) or less as a main component, and if necessary, a self-adhesive material to which a tackifier or a plasticizer is added is filled as a main component. Calcium carbonate, talc, mica, silica, carbon black,
A composite made of ultrafine silica powder, ultrafine titania, or the like, or a base material having a moisture permeability (JIS Z020)
2.0 g / m ² · 24 h (at 40 ° C., 90 ° C.)
% RH) or less and the nitrogen permeability (JIS Z1707-1)
1 × 10 ⁻⁶ cm ³ · cm / cm ² · sec · a) (based on plastic film for food packaging specified in 975)
tm (25 ° C.) or less and oxygen permeability (JIS Z170
1 × 10 ⁻⁵ cm ³ · cm / cm ² · sec)
c · atm (25 ° C.) Polyisoprene, silicone, polysulfide, polyethylene, polypropylene, polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polyacrylonitrile satisfying any or all of the following conditions: , Polymethacrylonitrile, Monsanto's "Lopag" (trade name), Sohio's "Barrex" (trade name),
Polyethylene terephthalate, nylon 6, nylon 6
6, such as polyamide-based, polyvinyl chloride, polyvinyl fluoride, polyimide, and other organic polymers to which tackifiers and plasticizers are added as necessary, and calcium carbonate as a filler if necessary. Compounds formed using talc, mica, silica, carbon black, ultrafine silica powder, ultrafine titania, or the like can also be used.

When a gas or a low molecular weight substance is permeated or released into the low pressure space, silica gel, activated carbon, activated clay, zeolite (3A, 4A, 5A) is applied to the organic polymer material in order to adsorb them. , 13X), an oxygen adsorbent, or an adsorbent such as an alloy getter material such as Ba-Al is preferably filled at 60 wt% or less, preferably 50 wt% or less. In addition, for example, when gas or low molecular weight material is not permeated or released into the low pressure space,
The adsorbent does not have to be filled.

The width of the opening (exhaust port) formed by the sealing material at the peripheral edge of the panel and the two sheet glasses is as follows.
If it is opened by about 0.1 mm, it is possible to decompress the laminated body in the decompression chamber.
Is exceeded, the sealing is not sufficient even if this opening is closed, so it is better to set the range of 0.2 mm to 2.0 mm.

It is preferable that the opening (exhaust port) formed by the seal and the two sheets of glass is one as described later.
Openings may be formed at various places. When there are two or more openings, the number of sides to be pressed may be increased according to the number.

The degree of vacuum in the sealed low-pressure space between the two sheet glasses is 1 × 10 ⁻² Torr or less, preferably 1 × 1 ⁻² Torr.
0 ^-3 Torr or less. The production of the double glazing is not limited, but is performed by the following procedure as an example.

[0033] Two sheets of glass, on which a low-melting-point solder alloy having a melting point of 200 ° C or less was formed in advance over the entire periphery of each peripheral edge, were prepared. At least a second sealing material mainly composed of a polymer material, which is thicker than the target gap, is provided so as to be in contact with the outer peripheral edge than the first sealing material composed of a low melting point solder alloy formed on the peripheral edge of the second sealing material. Arranged so as to be an opening except for a part, and then the other glass sheet is laminated to form a laminate, the laminate is introduced into a decompression chamber, and the space is depressurized to a predetermined pressure. And then take out the laminate in or out of the chamber, heat-treat the entire periphery of the laminate or the entire laminate, and apply a low-melting-point solder placed on two sheets of glass. By a second sealing material consisting mainly organic polymeric material as the first sealing material made of gold for bonding the two glass sheets.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. 1 and 2 are perspective views showing a process of manufacturing a low-pressure double-glazed glass panel in each of the examples.
FIG. 2 is an exploded perspective view before laminating two sheet glasses, FIG. 2 is a perspective view at the time of completion, and FIG. 3 is a sectional view of a main part at the time of completion.

Each of the two glass sheets 2 and 3 has a thickness of 3
mm, the dimensions are 1040 mm × 1040 mm, and one of the glass sheets 2 is a glass sheet without any coating, and the other glass sheet 3 is placed on the low pressure space side.
It is a low-emission plate glass coated with a plurality of layers of g and ZnO, and has a vertical emissivity of 0.07.

Each of the glass sheets is provided with Bi (34.8% by weight) -Sn (5) as first sealing materials 4 and 5 in advance.
2.2% by weight) -Sb (3% by weight) -Zn (10% by weight) -based solder alloy (melting point: 150 ° C. to 180 ° C.) having a width of 5 mm and a thickness of 0 mm at a distance of 5 mm from the edge of the plate glass. .
Heating and bonding are performed at a temperature of 160 ° C. while applying ultrasonic waves so as to be 15 mm.

The spacer 6 is made of a spherical titanium spacer having a diameter of 250 μm, which is arranged in a lattice at intervals of about 20 mm. As the second sealing material 7, an HMB wire is used in which a copper wire having a diameter of 250 μm and a hot melt butyl containing polyisobutylene as a main component filled with 20 wt% of zeolite 4A are coated so as to have an outer diameter of 2 mm.

The degree of vacuum in the low-pressure space is 7.6 × 10 ⁻³ Torr.
r. The procedure for producing the low-pressure double glazing is as follows. With one plate glass 2 placed horizontally on a mounting table or the like, spherical titanium spacers having a diameter of 250 μm as spacers 6 were arranged in a grid at intervals of about 20 mm.

Next, a hot melt butyl wire (HMB wire) as the second sealing material 7 was placed at a position 2.5 mm inward from the edge of the sheet glass, and a part thereof was formed as an opening 8 with a width of 0.5 m.
m, it was arranged all around.

Thereafter, the other sheet glass 3 is laminated and temporarily laminated to form a laminate into a vacuum chamber (not shown). When the degree of vacuum is increased, air in the space is exhausted from the opening, and the vacuum in the space is reduced. The degree gradually rises.

The space portion has a predetermined pressure, for example, 7.6 × 10
^When a pressure of ^-3 Torr is reached, pressing one side of the sheet glass on which the opening 8 is located by a plate-like pressing tool or the like (not shown) expands the covering portion of the second sealing material,
Close the opening.

Then, the entire laminated body is heated to about 160 ° C. by a heater in the chamber to melt-adhere the solder alloys 4 and 5 as the first sealing material, and at the same time, the second sealing material is more firmly adhered. Let it.

Next, air was introduced into the chamber, and the entire laminated body was firmly pressed by the atmospheric pressure (the spacer 6 and the second sealing material 7 were slightly deformed).
m to obtain a low-pressure double glazing.

The low-pressure double glazing thus obtained was taken out of the chamber, and PE was placed around the entire periphery of the double glazing.
T film 9 was wound and completed. The initial dew point of the obtained low-pressure double-glazed glass was determined by the method specified in JIS R3209-1995 to determine the initial heat transmission coefficient according to JIS A4710.
When measured by a method according to -1989, the initial dew point was -70 ° C or less, and the initial heat transmission coefficient was 1.36 kcal.
/ M ² h ° C, and after accelerated durability test class III specified in JIS R3209-1995, the dew point is -55 ° C, the heat transmission coefficient is 1.46 kcal / m ² h ° C, and the heat insulating performance is high. Even after the test under severe conditions, it was confirmed that there was almost no decrease in the initial dew point and the heat transmission coefficient, and that it had sufficient durability.

As is clear from the measurement results of the heat insulating performance, it was also confirmed that the film coated on the plate glass 3 was not affected at all by the temperature at the time of sealing.

[0046]

As described in detail above, the double-glazed glass panel of the present invention can have a remarkably excellent heat insulating performance and can maintain long-term durability.

Further, according to the method for producing a double-glazed glass of the present invention, a pipe-shaped tube is not required, and not only the trace of the exhaust port can be completely recognized but also the processing can be easily performed. is there.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a manufacturing process of a low-pressure double-glazed glass panel in an embodiment of the present invention, and is an exploded perspective view before two sheets of glass are laminated.

FIG. 2 is a perspective view showing a manufacturing process of the low-pressure double-glazed glass panel in the embodiment of the present invention, and is a perspective view at the time of completion.

FIG. 3 is a cross-sectional view of a main part at the time of completion in the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low-pressure double glazing panel 2 Sheet glass 3 Sheet glass (low radiation glass) 4, 5 First sealing material 6 Spacer 7 Second sealing material 8 Opening 9 PET film

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akira Sakata 1510 Oguchicho, Matsusaka-shi, Mie Pref.

Claims (5)

[Claims] The present invention is characterized in that two sheet glasses are spaced at a predetermined interval, a point-like, linear or mesh-like spacer for maintaining the spacing is provided, and the ends of the two sheet glasses are sealed with a sealing material. In the double-pane glass panel in which the low-pressure space is formed, the sealing material includes a first sealing material made of a low-melting-point solder alloy having a melting point of 200 ° C. or less, and an outside of the first sealing material. A low-pressure double-glazed glass panel characterized by being constituted by a second sealing material mainly composed of an organic polymer material, which is disposed on the periphery. 2. A low pressure double glazing panel according to claim 1, wherein one of the glass sheets is coated with a high-performance heat insulating film formed by a sputtering method. 3. The low pressure double glazing panel according to claim 1, wherein the sealing material mainly composed of an organic polymer material is filled with an adsorbent. 4. The low pressure double glazing panel according to claim 1, wherein a metal core is embedded in the second sealing material at the peripheral edge of the panel. 5. Two glass sheets are spaced at a predetermined interval, and a point-like, linear or mesh-like spacer for maintaining this interval is provided, and the peripheral edge of the panel is sealed with a sealing material. In the method of manufacturing a double-glazed glass panel in which a low-pressure space is formed, two sheet glasses in which a low-melting solder alloy having a melting point of 200 ° C. or less is formed in advance over the entire periphery of each peripheral edge are prepared. In a state in which the spacer is disposed on the plate glass of (1), the organic polymer-based material having a thickness larger than the target interval is mainly provided on the outer periphery of the first sealing material made of a low melting point solder alloy formed on the periphery of the plate glass. A second sealing material made of a material is disposed so as to be an opening except for at least a part, and then the other sheet glass is laminated to form a laminate, and the laminate is introduced into a reduced-pressure chamber,
After the space is reduced to a predetermined pressure, the opening is closed, and then at least the entire periphery of the laminate is subjected to a heat treatment to form a first seal made of a low-melting-point solder alloy placed on two sheets of glass. A method for manufacturing a low-pressure double-glazed glass panel, wherein two glass sheets are bonded by a second sealing material made of a material and an organic polymer material.