JPH08157238A - Double layer glass and its production - Google Patents

Abstract

PURPOSE: To obtain double layer glass which is mountable at a sash and does not require spacers by sealing a glass plate having a flange part and another glass plate via an adhesive over the entire periphery of the flange part, thereby forming a closed space. CONSTITUTION: The glass plate 2 having a flat part 2a, a continuous sidewall part 2b bent to have a recessed shape from this flat part 2a and the continuous flange part 2c bent outward from this sidewall part 2b is formed. This glass plate 2 and another glass plate 3 are then joined and sealed by the adhesive 4 over the entire periphery of the flange part 2c, by which the hermetically closed space 5 is formed between the glass plate 2 and the glass plate 3 and the double layer glass 1 is produced. The thickness of the sidewall part 2b of the glass plate 2 is preferably set at >=0.7 times the thickness of the flat part 2a. Low melting glass solder or low moisture vapor permeation resin adhesives are adequately used as the adhesive 4. The deformation of the glass plates 2, 3 is effectively prevented if dry air of ordinary temp., etc., are enclosed into the hermetically closed space 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double glazing and a method for producing the same. More specifically, the present invention relates to a double glazing, which is a glass molded body having at least one glass plate having a flange portion, and does not use a spacer, and a method for producing the same.

[0002]

2. Description of the Related Art A conventional double glazing has two glass plates facing each other through a spacer containing a desiccant, for example.
Inject resin adhesive with low moisture permeability into the outer periphery of the spacer.
It was manufactured by fixing. Also known are double glazing in which the outer periphery is fixed with metal solder also serving as a spacer and dry air is enclosed in a sealed space, and double glazing in which the periphery of a glass plate is heated to a high temperature to melt and join the ends. ing.

[0003]

In the conventional method of joining two glass plates through the spacer, the spacer is expensive and there is a cost problem. Further, since the spacer is interposed, the end portion of the double glazing is thicker than that of normal glass, and it is necessary to interpose an adapter when attaching to the window or to use a special expensive sash.

Further, in the method of heating the periphery of the glass plate to a high temperature to melt and join the ends, the processing is performed at a high temperature, so that it is necessary to pay attention to the deformation and thermal cracking of the flat surface of the glass. It was not the target.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems, to provide a double glazing which can be attached to an ordinary sash without using a spacer and a manufacturing method thereof.

[0006]

To achieve this object, the characteristic structure of the double glazing of the present invention is that at least one of the two glass plates has a flat portion and a concave shape from this flat portion. It has a side wall part that is bent and connected, and a flange part that is bent and connected from the side wall part to the outside, and the flange part and the other glass plate are sealed around the entire circumference of the flange part with an adhesive, It is in the place where a closed space is formed between them.

The method for producing double glazing of the present invention is
A flat part, a side wall part outside the flat part, and a flange part continuous with the side wall part are formed on one glass plate, and the flange part and the other glass plate are sealed around the entire circumference of the flange part with an adhesive. However, the closed space is formed between the glass plates.

The constituent elements of the double glazing according to the present invention will be described below in order.

The double glazing of the present invention can be formed, for example, by the method disclosed in US Pat. No. 4,891,055.

In the present invention, the thickness of the side wall portion is preferably 0.7 times or more the thickness of the flat portion. If it is less than 0.7 times, the glass plate on the side wall portion becomes thin and a problem in strength tends to occur.

The low melting point glass solder used as the adhesive is supplied, for example, in the form of a glass frit, applied to the flange portion of the glass plate and then heated to the melting temperature of the frit (usually about 300 to 500 ° C.). Then, the frit is melted and this flange is joined to another glass plate for sealing.

However, when the sealing temperature reaches several hundreds of degrees Celsius, the closed space formed between the glass plates becomes depressurized when cooled to room temperature after sealing, so that when the glass plates are thin, a concave deformation occurs. Occurs. Therefore, in order to prevent the glass plates from being deformed after the cooling, it is preferable to maintain the environment for sealing the glass plates in a pressurized state corresponding to Th / Tr. In such sealing, it is preferable to adopt the seal adhesion width disclosed in, for example, US Pat. No. 5,238,132 in order to maintain the pressure resistance of the container formed between the glass plates.

When the flange portion of one glass plate and the other glass plate are sealed together with an adhesive around the entire circumference of the flange portion, an unsealed portion is first formed in a part and then the glass plate is formed. After cooling to room temperature with the closed space formed between the plates and the outside having air permeability, and introducing dry air at room temperature and / or a gas with low thermal conductivity into the closed space from the unsealed part, Sealing the sealed portion is also effective in preventing deformation of the glass plate due to pressure difference between the inside and the outside.

A resin adhesive having a low moisture permeability can be used as the adhesive. In this case, for example, a butyl-based hot melt adhesive may be mentioned, but it is not limited to this as long as it has low moisture permeability.

Also, when the resin adhesive is used,
It is preferable to raise the environmental temperature in order to shorten the bonding time of the glass plates. That is, when the flange portion and the other glass plate are sealed around the entire circumference of the flange portion with an adhesive, the environment at the time of sealing is the same as in the above case.
Or to form a non-sealed part on the glass plate and cool it to room temperature with the closed space formed between the glass plates and the outside breathable. It is preferable to introduce dry air at room temperature and / or a gas having low thermal conductivity from the adhered portion into the closed space, and then seal the unsealed portion.

A desiccant may be provided on the inner periphery of the side wall portion in order to maintain the dry state of the closed closed space more favorably. As the desiccant, it is possible to use, for example, zeolite or silica gel because of its drying ability.

The distance between the flat portion of the glass plate having the flange portion and the other glass plate in the sealed state is 3 to.
A range of 50 mm is preferred. If the distance is 3 mm or less, the heat insulating effect is reduced, so the effect as a double glazing cannot be expected unless the pressure is further reduced, and it is difficult to form a glass plate if the distance is 50 mm or more. .

It is preferable that the interior angle between the planes of the adjacent side wall portion and the flange portion is in the range of 90 to 130 °. In this way, by setting the interior angle within the above range, it is possible to form a double glazing having a sharply bent side wall.

The glass plate used is not particularly limited, and for example, soda lime glass manufactured by the float method, template glass, reticulated glass, low-emission film glass or the like can be used.

[0020]

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

FIG. 1 is a sectional view showing a double glazing of the present invention, and FIG. 2 is a sectional view showing another embodiment.

In FIG. 1, the double glazing (1) has a flat portion (2a), a side wall portion (2b) connected by being bent from the flat portion (2a) so as to have a concave shape, and a side wall portion (2b).
The one glass plate (2) and the other glass plate (3) having the flange portion (2c) that is bent outward from the outer side of the flange and the other glass plate (3) are joined and sealed by the adhesive (4) over the entire circumference of the flange portion (2c). And forms a closed space (5) sealed between the glass plates. In addition, D has shown the distance between the flat part (2a) and the glass plate (3).

Further, in the figure, the thickness of the side wall portion (2b) is 0.7 times or more the thickness of the flat portion (2a),
The interior angle between the planes of the side wall portion (2b) and the flange portion (2c) is about 125 °.

Further, the double glazing (1) of FIG. 2 has a flat portion (2a), a side wall portion (2b) which is formed by bending the flat portion (2a) so as to have a concave shape, and a continuous side wall portion (2b).
The one glass plate (2) having a flange portion (2c) that is bent outward from the outside and the glass plate (3) having substantially the same shape as the glass plate (2) have a flange portion (2).
c) and the flange portion (3c) are joined and sealed with an adhesive (4) along the entire circumference to form a closed space (5) sealed between the glass plates. In addition, D is a flat portion (2a) and a flat portion (3
The distance between a) is shown.

FIG. 3 is a plan view showing another embodiment of the present invention, in which the adhesive (4) is applied to the flange portion (2c) by forming an unapplied portion (6) on a part thereof. In the figure, L indicates the length of the glass plate (2) and W indicates the width.

(Example 1) Using a float glass plate having a thickness of 3 mm, the dimension (L x W) including the flange portion was 1120 mm and 820 mm, and the dimension (D) of the inner surface height was 12 mm. Was produced by heating and bending. The thickness of the side wall portion of this molded body was measured to be about 2.5 mm, which was about 0.83 of the thickness of the flat portion.
It was double. The width of the flange (bonding width) is about 20.
mm, the internal angle between the side wall and the plane of the flange is 12
It was 5 °.

Next, a low melting point glass solder having a sealing temperature of 450 ° C. (“NSF-2255” manufactured by Nippon Sheet Glass Co., Ltd.) was applied to the entire circumference of the flange portion of the molded body, and the low melting point glass solder was interposed. It was bonded and sealed to a float glass plate having a thickness of 3 mm to obtain the double glazing shown in FIG.

At the time of sealing, the sealing furnace is set to about 2.4 kgf.
The pressure was increased to / cm ² . Moreover, even after cooling to room temperature, no dent due to the pressure difference was observed in the flat portion of the glass plate.

Example 2 Two float glass plates having a thickness of 10 mm were used, and the size including the flange portion (L ×
Molded bodies having W) of 900 mm and 820 mm and an inner surface height dimension (D) of 25 mm were prepared by heating and bending. Each of the molded bodies was formed with a convex portion of about 500 μm on the flat portion.

Next, the low melting glass solder used in Example 1 (sealing temperature 45
(0 ° C.) was applied and bonded and sealed to the flange portion of the other molded body through a low melting point glass solder to obtain a double glazing shown in FIG.

The sealing furnace remained at normal pressure during sealing. Even after cooling to room temperature, the double glazing is completely kept airtight, and since the convex portion is depressurized to about 0.4 atm, it becomes a substantially flat state, and the distance between the glass plates is 50.
It was held in mm. In the above-mentioned double glazing, the distance between the flat portions of the glass plate was large, and high soundproofing performance was recognized.

(Example 3) Using a float glass plate having a thickness of 3 mm, the dimension including the flange portion (L × W) is 1210 mm and 820 mm, and the inner surface height dimension (D) is 6 mm. Was produced by heating and bending. When a 3 mm-thick float glass plate was bonded and sealed to this molded body, the width of the flange of the molded body was about 1 mm.
An uncoated portion having a thickness of 3 mm was formed, a low melting point glass solder was applied, and a float glass plate having a thickness of 3 mm was bonded and sealed through the low melting point glass solder so that the closed space was ventilated to the outside.

The sealed body is once cooled to room temperature, and then dehumidified argon gas is introduced into the closed space. Then, the unsealed portion is sealed with a resin adhesive (trade name "Torr").
Sealing ") to obtain a double glazing. The multi-layer glass had high heat insulation performance, and no deformation of irregularities was observed in the flat part of the glass plate.

(Example 4) Using a float glass plate having a thickness of 3 mm, the dimensions (L x W) including the flange portion were 1210 mm and 820 mm, respectively, and the inner surface height dimension (D) was 6 mm. Was produced by heating and bending.

Next, a low melting point glass solder (glass frit) is applied to the entire circumference of a float glass plate having the same dimensions as the flange portion of the molded body and a thickness of 3 mm, and 300 to 500 is applied only to the vicinity of the frit by radiant heating. It melt | dissolved by heating to the melting temperature of (degreeC). The flange portion of the molded body, the flange portion of which was preheated, was pressure-bonded to the glass frit application portion of the glass plate to bond and seal it. Then, after holding the sealed portion at about 300 ° C. for several minutes, it was cooled to room temperature over about 30 minutes to obtain a double glazing. The multi-layer glass showed high airtightness at room temperature without distortion of the glass plate.

(Embodiment 5) Using a float glass plate having a thickness of 3 mm, the dimensions (L × W) including the flange portion are 1210 mm and 820 mm, respectively, and the inner surface height dimension (D) is 6 mm. Was produced by heating and bending. Then, a desiccant made of zeolite contained in a small pipe having air permeability was fixed to the inner periphery of the side wall of the molded body along the flange.

Next, on the entire circumference of the flange portion of this molded body,
A butyl-based hot melt adhesive was applied at room temperature and bonded and sealed to a float glass plate having a thickness of 3 mm via the adhesive to obtain a double glazing having a closed space in a dry state.

[0038]

As described above in detail, the double glazing of the present invention does not require the spacer which is required in the conventional double glazing. Also, it can be attached to a normal sash,
It is possible to manufacture a double glazing having a high design with an optical shine on the side wall.

[Brief description of drawings]

FIG. 1 is a sectional view showing a double glazing of the present invention.

FIG. 2 is a sectional view showing another embodiment of the present invention.

FIG. 3 is a plan view showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Multi-layer glass 2 Formed body 3 Glass plate 2a, 3a Flat part 2b, 3b Side wall part 2c, 3c Flange part 4 Adhesive 5 Closed space 6 Unapplied part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masao Misono, 3-5-11 Doshomachi, Chuo-ku, Osaka City, Osaka Prefecture Nippon Sheet Glass Co., Ltd.

Claims (10)

[Claims] 1. At least one of the two glass plates has a flat portion, a side wall portion that is bent and connected from the flat portion to form a concave shape, and a flange portion that is bent and connected outward from the side wall portion. The flange portion and the other glass plate are sealed together with an adhesive around the entire circumference of the flange portion to form a sealed closed space between the glass plates. Layered glass. 2. The double glazing according to claim 1, wherein the thickness of the side wall portion is 0.7 times or more the thickness of the flat portion. 3. The double glazing according to claim 1, wherein dry air and / or a low thermal conductivity gas at room temperature is enclosed in the closed space. 4. The double glazing according to claim 1, wherein a low melting point glass solder or a low moisture permeable resin adhesive is used as the adhesive. 5. The double glazing according to claim 1, wherein the distance between the flat portion of one glass plate and the other glass plate in the sealed state is 3 to 50 mm. 6. The double glazing according to claim 1, wherein a desiccant is provided on the inner periphery of the side wall. 7. A flat portion, a side wall portion connected to the outside of the flat portion, and a flange portion connected to the side wall portion are formed on one glass plate, and the flange portion and the other glass plate are formed on the entire circumference of the flange portion. A method for producing double glazing, characterized in that a sealed space is formed between the glass plates by sealing with an adhesive. 8. The production of a double glazing as claimed in claim 7, wherein the sealing is performed under a pressure corresponding to Th / Tr when the sealing temperature is Th and the room temperature is Tr (both are absolute temperatures). Method. 9. When sealing the flange portion and the other glass plate with an adhesive agent, an unsealed portion is first formed in a part, and then from the unsealed portion to the closed space. The method for producing a double glazing according to claim 7 or 8, wherein the unsealed portion is sealed after introducing dry air at room temperature and / or a low thermal conductivity gas. 10. The method for producing a double glazing according to claim 7, wherein a low melting point glass solder or a low moisture permeable resin adhesive is used as the adhesive.