JP2001206740A - Low-pressure duoble-gazing and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily manufacturing a low-pressure double-glazing and to provide constitute capable of holding the pressure in the spacing part thereof for a long period of time. SOLUTION: The peripheral ends of the low-pressure double-glazing are sealed with an organic high-polymer material having low gas permeability and the gaseous molecules infiltrating the spacing part of the low-pressure double-glazing through the sealing material are adsorbed by a getter material, by which initial pressure in the spacing part is maintained for a long period of time. As a result, the unleading of the low-pressure double-glazing is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the field of energy saving in the field of construction such as housing and non-residential, the field of transportation of automobiles, vehicles, ships, aircrafts, etc., and the field of equipment such as freezers, freezer showcases, constant temperature and humidity chambers. TECHNICAL FIELD The present invention relates to a low-pressure double-glazed glass panel having high heat-insulating performance applied to an opening that requires the following and a method for producing the same.

[0002]

2. Description of the Related Art In recent years, in order to create a comfortable and healthy living environment excellent in energy saving, double-layered glass having heat insulating performance has been used more frequently than in the past 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.

[0004]

In order to decompress the internal space of the double-glazed glass to obtain a high heat insulating low-pressure double-glazed glass,
It is necessary to reduce the pressure in the internal space to 10 Pa or less, preferably 1 Pa or less. However, in order to maintain such a low pressure for a long period of time, for example, for 10 years or more, the peripheral edge of the double glazing must be sealed with a gas-impermeable material. Materials used for this sealing include metal-based materials, organic polymer-based materials, and glass-based materials. Among them, metal materials have problems in adhesion to glass and durability, and organic polymer materials have problems in long-term retention in a low-pressure space. For this reason, a glass-based material having excellent pressure retention and durability has been employed as a sealing material.

However, a glass-based material requires a heating process at 400 to 500 ° C. or a large-sized heating device in order to perform sealing, which has been a major factor in increasing the cost of low-pressure double-glazing. In addition, there is a practical problem that a large amount of lead must be contained in order to obtain satisfactory physical properties as a sealing material. However, there are problems such as In view of the above, the present invention significantly reduces the amount of use of a lead component having a large burden on the environment as a sealing material, or a configuration of a low-pressure double glass capable of maintaining a low-pressure space for a long time without using it at all. And a method of manufacturing the same.

[0006]

According to the low pressure double glazing of the present invention, two sheets of glass are separated at a predetermined interval by a dot-like, linear or mesh-like spacer, and the peripheral edge is sealed with a sealing material. In the low pressure double glazing in which the low pressure space is formed, an activated getter material is provided in the low pressure space.

In addition, the sealing material at the peripheral end is a polymer material, and the diplomatic molecular material has a nitrogen gas permeability coefficient of 6 at 25 ° C.
× 10 ⁻¹¹ cm ³ · cm / sec · cm ² · Pa or less.

In addition, a metal container is provided in contact with the opening of the gap portion of the double-glazed glass, an activated getter material is provided in the metal container, and the material of the metal container is 25 ° C. The thermal conductivity at 100 W / m ° C or lower.

Further, the activated getter material is characterized in that the nitrogen gas adsorption speed is 100 cm ³ / sec · cm ² or more and the surface area is 1 mm ² or more.

[0010] At least one corner portion is cut obliquely, the length of the opening of the cut portion is 5 mm or more, and a metal getter in which the corner portion is activated is provided. And an exhaust tube for exhausting a gap portion of the double glazing is accommodated in the metal container.

[0011] Further, the two glass sheets are spaced at a predetermined interval by a dot-like, linear or mesh-like spacer, and the peripheral end is sealed with a sealing material to reduce the gap of the double-glazing to a predetermined pressure. A method for producing a low-pressure double glazing, comprising: activating a getter material present in a low-pressure space after depressurization, activating the getter material, and sealing the opening after further evacuating the gap. .

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Two sheets of glass are clear float glass, glass with a low radiation film, heat absorbing glass, heat reflecting glass, high performance heat reflecting glass, wire entering glass, net entering glass, mold glass, and the like. Various types of plate glass such as tempered glass, double-strength glass, low reflection plate glass, high transmission plate glass, frosted glass, tapesti (frost) glass, ceramics printed glass, laminated glass can be appropriately combined, but at least one sheet is special to these various plate glasses. It is preferable to use a low-emission plate glass coated with a metal film because the heat insulating performance is improved. In this case, in the present invention, not only a film formed by a CVD method having a relatively high vertical emissivity but also a sputtering method having a low vertical emissivity is used. A coated coating film can be employed.

[0013] Further, the low radiation plate glass is JIS
R3106-1985 (Test method for transmittance, reflectance and solar heat gain of sheet glass) Using one or more glasses having a vertical emissivity of 0.20 or less, preferably 0.10 or less, or vertical radiation It is preferable to use two glasses having a ratio of 0.35 or less, preferably 0.25 or less.

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 a tempered glass, especially in the case of a chemically strengthened glass, the thickness is not limited thereto, and a glass having a size of 1.9 mm or less can be used.

As a material for a point material, a wire material, or a mesh material spacer for maintaining the interval between two flat plates, if the material has a lower hardness than the type of plate used and has an appropriate compressive strength, it is particularly preferable. Without limitation, metals, alloys, steel, 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. 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 flat plates is 0.05 mm or more,
2.0 mm or less, preferably 0.1 mm or more and 1.0 mm or less.

The sealing material used at the peripheral edge of the double glazing is
A sealing material made of a polymer material is used. The polymer material was measured by a method according to JIS Z1707.
Nitrogen permeability coefficient at 6 ° C is 6 × 10 ^-11 cm ³ · cm / sec
· Cm ² · Pa or less.

An adsorbent such as silica gel, activated carbon, activated clay, zeolite, or an oxygen adsorbent which adsorbs water vapor or a low molecular weight substance is added to the sealing material in an amount of 60% by weight or less, preferably 50% or less.
Filling at a ratio of not more than% by weight is preferable because gas does not easily pass through the gap. Further, it is more preferable to embed a metal core material such as stainless steel, iron steel, nickel steel, titanium steel, copper, or tin in the sealing material because the core material prevents gas permeation.

As the base material of the above-mentioned polymer material, the above-mentioned condition of the transmission coefficient may be satisfied, and polyisobutylene,
Silicone, polysulfide, polyethylene, polypropylene, polyvinylidene fluoride (PVDF) and Shin-Etsu Chemical's fluoroelastomer for liquid injection molding "SIFE"
L610 "," SIFEL612 "," SIFEL65
0 "," SIFEL611 "," X-70-631 "
(The above-mentioned trade names) such as fluororesin, polyacrylonitrile, polymethacrylonitrile, Monsanto's “Lopag” (trade name), Sohio's “Barrex” (trade name), polyethylene terephthalate, nylon 6, Polyamides such as nylon 66, epoxy resins such as "Super Back Seal" (trade name) manufactured by Anelva, and organic polymers such as polyvinyl chloride, polyvinyl fluoride, and polyimide, if necessary, a tackifier. And plasticizers, etc., and if necessary, composites using calcium carbonate, talc, mica, silica, carbon black, ultrafine silica powder, ultrafine titania, etc. it can.

In order to adsorb the gas permeating the sealing material at the peripheral edge of the low-pressure double-glazed glass and the gas generated from the plate glass and the sealing material to the getter material and maintain the initial pressure in the gap for a long period of time. Activated getter material is JIS
It is preferable that the nitrogen gas adsorption rate measured by a method based on B 8316 is 100 cm ³ / sec · cm ² or more, and the surface area of the getter material is 1 mm ² or more.

As the getter material, Ba, Ba-Al
Type alloy evaporation type, Zr-Al type alloy, Ti, Zr-Ti
A non-evaporable type such as a base alloy, a Zr-V-Fe based alloy, or a sintered body of Zr powder and graphite powder can be used.

At room temperature, these getter materials are inactive because they have a protective layer of an oxide film layer or a nitride film layer on the surface and have no gas adsorption ability. However, it is activated when heated in vacuum. In the case of the evaporative type, a metal is deposited on a wall surface, a clean metal surface appears on the surface, and gas starts to be adsorbed. In the case of the non-evaporation type, the coating layer diffuses into the metal, a clean metal surface appears on the surface, and gas adsorption starts.

In order to activate the gas which permeates the sealing material at the peripheral edge in the low-pressure double-layered glass and the getter material which adsorbs the gas generated from the sheet glass and the sealing material, the getter is heated for the above-mentioned reason. Need to do. It is preferable that an activated getter material is provided in a metal container so as not to cause thermal cracking of the glass. In order to prevent heat from propagating from the metal container to the glass when the getter is heated, it is preferable that the thermal conductivity of the metal is small, and the thermal conductivity at 25 ° C is 100 W / m ° C or less. .

Metal containers include iron, tungsten, nickel, chromium, titanium, carbon steel, chromium steel, nickel steel, stainless steel, nickel chrome steel, manganese steel, chromium manganese steel, chromium molybdenum steel, silicon steel, Brass or the like can be used.

It is preferable that the above-mentioned metal container has a good appearance in the corner portion of the double-glazed glass. Specifically, at least one or more corners of the multi-layer glass cell are cut obliquely when viewed from above, and the cut portion has an opening of 5 mm × a gap or more, and the corner is activated. Covered with a metal container in which the obtained getter material is present.

Further, it is preferable that an exhaust tube for exhausting a gap portion of the double-glazed glass is housed in the metal container because the appearance of the low-pressure double-glazed glass is improved.

As the exhaust tube, a metal or glass tube can be used. Metal tubes include iron, tungsten, nickel, chromium, titanium, carbon steel, chrome steel, nickel steel, stainless steel, nickel chrome steel,
Manganese steel, chrome manganese steel, chrome molybdenum steel,
Silicon steel, brass, tin, solder, nichrome, aluminum,
Duralumin can be used, and soda-lime glass, borosilicate glass, and low-melting glass can be used for the glass tube. Such an exhaust tube is made of low melting glass,
Seal and connect to a metal container using solder, brazing material, organic polymer material, etc.

After connecting the exhaust tube of the double glazing to a vacuum device and reducing the pressure in the gap of the double glazing to a predetermined pressure, the getter material present in the low pressure space is heated and activated to activate the getter material. It is preferable to perform efficient evacuation and long-term pressure maintenance because low-pressure double glazing can be efficiently produced. At this time, the sealing of the exhaust tube may be performed before the activation of the getter material, but is more preferably performed after the activation of the getter material.

As described above, the provision of the getter material is an effective means for maintaining the pressure in the low-pressure space with respect to the low-pressure double-glazed glass whose peripheral end is sealed with a polymer material. It enables long-term use. Further, in the low-pressure double-layer glass using a material other than a polymer material such as a low-melting-point glass, a solder, and a low-melting-point metal such as a brazing material for the sealing material at the peripheral end, providing a getter material also
This is an effective means for maintaining the pressure in the low-pressure space for a long period of time, for example, when gas is generated from the sealing material or when a small amount of air flows in.

[0033]

Embodiments of the present invention will be described below in detail with reference to the drawings.

Embodiment 1 FIG. 1 shows a perspective view of a low-pressure double-glazing unit in this embodiment. The cross section taken along the line aa ′ in FIG.
2 and 3 show the vicinity of the corner portion of the section b ′. Each of the two glass sheets 2 and 3 is 3 mm in thickness, and is a float glass sheet having a size of 1040 mm × 1040 mm. Each glass sheet is cut off in a corner portion in a range of 25 mm from the top to the side along one side. Keep it.

The glass sheet 2 is coated with a low emissivity film having a vertical emissivity of 0.07 on the low pressure space side.

The sheet glass 3 was made of SUS430.
The columnar microspacers 4 having a height of 0.5 mm and a height of 0.2 mm are arranged at a pitch of 2 cm × 2 cm. An epoxy resin super back seal (manufactured by Anelva, trade name) in which 30% by weight of zeolite powder having a width of 8 mm, a height of 0.25 mm and 50 μm is mixed is applied to the periphery of the glass except for the above-mentioned cut corners. Sealing material 5a. In addition, sealing material 5
A 0.2 mmφ Al wire 6 was buried in the center of the resin at the center of the resin in order to ensure the sealing performance. FIG. 4 shows the shape of the exhaust opening with the above-mentioned cut corner as the opening 7.

The sheet glass 2 and the sheet glass 3 were combined while applying a sufficient load to form a multilayer body having an interval of 0.2 mm.

The corner cap 13 shown in FIG.
Is prepared. FIGS. 6 and 7 respectively show c-
The c ′ section and the dd ′ section are shown.

A hole in which the heating wire 9 is wound around the getter material 8, a metal wire connecting the heating wire 9 and the conductive wire 10 is provided in a metal container, and the metal wire 10 is provided on a side wall of the metal container 12. And the periphery of the metal wire 10 is sealed with a sealing material 5 ′. Further, an exhaust pipe 11 made of glass was connected to a metal container 12 with a sealing material 5c to form a corner cap 13.
A Ba-Al alloy was used as the getter material, a nichrome wire was used as the heating wire 8, a Cu wire was used as the conductor 10, and the metal container 12 was made of stainless steel.

The corner cap 13 is placed over the cut corner of the multilayer body of the sheet glass 2 and the sheet glass 3, and the sealing material 5d
And hermetically sealed.

After the corner cap 13 was hermetically sealed, the multilayer body was heated at 110 ° C. for 1 hour to form the sealing materials 5a, 5a.
b, 5c, and 5d are hardened to form a firmly integrated double-glazed glass. The exhaust glass tube 11 is connected to an exhaust device (not shown) while maintaining the ambient temperature of 110 ° C. to form a gap between the double-glazed glasses. The gas was exhausted to 1 Pa, the Nichrome wire 9 in the metal container 12 was passed through and heated to about 800 ° C.
The Al alloy was evaporated to form a Ba—Al alloy deposited film 8 ′ on the inner surface of the metal container 12 to obtain a getter material. The surface area of the activated getter material was about 3 cm ² .

After forming the getter material, the exhaust pipe 11 was sealed by heating. The length of the exhaust pipe 11 after the heat sealing was such that it did not protrude from the metal container 12 as shown in FIG. Further, in order to protect the corner portion, the cover 14 was made of a hard PVC resin, and was attached so as to cover the corner portion cap 13. Thus, the low-pressure double-glazed glass 1 was obtained.

The low pressure double glazing thus produced has an initial dew point of -70 ° C. or lower and a heat transmission coefficient of 1.5 W / m.
^The temperature was ² ° C., and it was confirmed that dew condensation hardly occurred and good heat insulating performance was obtained. In addition, gas that passes through the sealing material at the peripheral end of the getter 8 in the low-pressure space of the low-pressure double-glazed glass,
The initial heat transmission coefficient could be maintained for a long period of time by the action of adsorbing the gas generated from the sheet glass and the sealing material.
For comparison, changes with time in the heat transmission coefficient when the low-pressure double-glazed glass is kept at 80 ° C. with and without activation of the getter 8 are shown.

[0044]

[Table 1]

[0045]

The low-pressure double glazing of the present invention makes it possible to maintain the pressure in the low-pressure double glazing for a long period of time. It can be retained for a long time by the activated getter material. This prevents the peripheral edge of the low-pressure double-glazed glass from being sealed with the lead-containing low-melting-point glass, and can achieve lead-free.

[Brief description of the drawings]

FIG. 1 is a perspective view of a low-pressure double glazing.

FIG. 2 is a sectional view taken along the line a-a 'in FIG.

FIG. 3 is a sectional view of a principal part taken along line b-b 'in FIG. 1;

FIG. 4 is an exhaust corner.

FIG. 5 is a perspective view of a corner cap.

FIG. 6 is a sectional view taken along the line c-c ′ in FIG. 5;

FIG. 7 is a sectional view taken along the line d-d 'in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low-pressure double glass 2 Sheet glass with Low-E film 3 Sheet glass 4 Spacer 5a, 5b, 5c, 5d Sealing material 6 Metal wire 7 Opening 8 Getter 9 Heating wire 10 Conducting wire 11 Exhaust pipe 12 Metal container 13 Corner Cap 14 cover

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Takao Tomioka 1510 Oguchicho, Matsusaka-shi, Mie Prefecture Central Glass Co., Ltd. Glass Research Laboratory F-term (reference) 4G061 AA25 BA01 BA02 BA10 CB02 CB19 CD02 CD13 CD14 CD23 CD25 DA26 DA30

Claims (9)

[Claims] 1. A low pressure double glazing in which a low pressure space is formed by separating two sheet glasses at a predetermined interval with a dot-like, linear or mesh-like spacer, and sealing a peripheral end thereof with a sealing material. 3. The low pressure double glazing according to claim 1, wherein an activated getter material is provided in the low pressure space. 2. The low-pressure double glazing according to claim 1, wherein the sealing material at the peripheral end is a polymer material. 3. The sealing material at the peripheral end is a nitrogen gas at 25 ° C.
Has a transmission coefficient of 6 × 10 ^-11cm^Three・ Cm / sec ・ cm^Two
Claims: It is a polymer material of Pa or less.
3. The low-pressure double glass according to 1 or 2. 4. The method according to claim 1, wherein a metal container is disposed in contact with the opening of the gap of the double-glazed glass, and an activated getter material is provided in the container. The low pressure double glazing according to any one of the above. 5. A metal container, wherein the material of the metal container is 25.
The low-pressure double glazing according to claim 4, wherein the thermal conductivity at 100C is 100 W / mC or lower. 6. The activated getter material has a nitrogen gas adsorption rate of 100 cm ³ / sec · cm ² or more and a surface area of 1 mm ² or more.
A low-pressure double-glazed glass according to any one of the above. 7. At least one or more corner portions are cut obliquely, the length of the opening at the cut portion is 5 mm or more, and the corner portion is provided with an activated getter therein. The low pressure double glazing according to any one of claims 1 to 6, wherein the low pressure double glazing is covered with a container. 8. The low-pressure double glazing according to claim 1, wherein an exhaust tube for evacuating a gap between the double glazings is housed in a metal container. 9. The two glass sheets are spaced at a predetermined interval by a dot-like, linear or mesh-like spacer, and the peripheral edge is sealed with a sealing material to reduce the gap of the double-glazed glass to a predetermined pressure. The method according to any one of claims 1 to 8, wherein after the pressure is reduced, the getter material present in the low-pressure space is heated and activated, and further the opening is sealed after the gap is evacuated. A method for producing the low-pressure double-glazed glass according to the above.