JPH0867536A - Fireproof double glazing - Google Patents

Abstract

PURPOSE: To obtain a fireproof double glazing prevented from burning the sealer or the gas generated therefrom even if the sealed part is heated in a fire, by applying a fireproofing coating material on the inner peripheral surface of the sealed part being in contact with an air layer of a double glazing with at least one sheet of glass being a fireproof glass. CONSTITUTION: Firstly, a double glazing with an air layer 3 is made by putting a desiccant-contg. metallic spacer 5 in between a fireproof glass consisting of heat resistance glass and a conventional glass 2 consisting of float glass followed by bonding with a primary sealer 6 consisting of butyl rubber. Second, the outer periphery of this double glazing is packed with a secondary sealer 7 consisting of a polysulfide to effect perfect sealing. A thermally expansive material 4 at a width about 4/6 times that of the air layer 3 is set, in advance, on the surface being in contact with the air layer 3 of the spacer 5. Third, the resultant double glazing is held with a frame, and, on heating the glazing from the side of the fireproof glass 1, the thermally expansive material 4 is expanded, covering the whole inner peripheral surface of the sealed part exposed to the air layer 3. As a result, even in case the glass 2 on the non-heated side is broken, a combustion due to the gas generated from the primary sealer does not occur, let alone a combustion of this primary sealer 6 itself.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof double glazing applied to fireproof structures such as fire doors, windows and walls.

[0002]

2. Description of the Related Art At least one fireproof glass such as a wire-reinforced glass, a low expansion tempered glass and a transparent crystallized glass is used.
In the case of double glazing whose periphery is sealed with a flammable sealing material, if the glass on the non-heated surface side breaks during a fire, the heating of the double glazing will cause the sealing material to burn, or The generated gas often burns, and there is a problem that a fire is caused on the non-heated surface side due to the combustion.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to seal a double glazing even when the glass on the non-heated surface side is broken when the seal part of such a fire proof double glazing is heated during a fire. It is an object of the present invention to provide a fireproof double glazing in which a fire does not occur on the non-heated surface side due to the combustion of the material or the gas generated from the sealing material.

[0004]

According to the present invention, in order to achieve the above object, a fireproof coating material made of a thermal expansion material or a noncombustible material is arranged on the inner peripheral surface of a seal portion which comes into contact with an air layer of a fireproof multilayer glass. It is characterized by

As shown in FIG. 3, at least one of the conventional fireproof double glazings is composed of a fireproof glass 1 and the other is a normal glass 2. These glasses are separated by a spacer 4 to form a predetermined glass. An air layer 3 is provided, and its peripheral portion is sealed with a sealing material. When used as a fireproof double glazing, the fireproof glass 1 is used outside, that is, on the heating surface side, and the glass 2 is used on the non-heating surface side. In this case, various sealing methods have been proposed. Usually, the spacer 5 and the glass are bonded to each other with a primary sealing material 6 made of, for example, flammable butyl rubber, and the outer side thereof is covered with a secondary sealing material 7. Completely sealed.

The fireproof double glazing according to the present invention has essentially the same basic structure as a double glazing, but in the case of such a fire proof double glazing, the above-mentioned primary seal is used. Since the material is exposed to the air layer 3, when heated during a fire, if the glass on the non-heated surface side breaks, the sealing material itself will burn or the gas generated from this sealing material will burn. Therefore, the combustion of these causes a fire on the non-heated surface side.

In order to prevent such a fire on the non-heated surface side, the present invention disposes a fireproof coating on a part or all of the inner peripheral surface of the seal portion which comes into contact with the air layer of the fireproof double glazing,
Even when the sealed portion is heated, the primary sealing material exposed to the air layer is prevented from burning, and the generated gas thereof is prevented from burning.

In the present invention, the fireproof glass is not particularly limited, but low expansion glass such as reticulated glass and borosilicate glass, for example, "Tempax" (trade name: manufactured by German Shot Company), " Pyrex "(trade name: manufactured by Corning Glass Works, USA) and low expansion tempered glass such as" Piran "(trade name: manufactured by Schott in Germany) are preferable. In addition, transparent crystallized glass, tempered glass and the like can also be used within an allowable range. These fireproof glasses are used at least as the glass on the heating surface side, that is, the outside glass of the double glazing, and the glass on the non-heating surface side may be ordinary glass, but the fireproof glass may be used.

A thermal expansion material or a noncombustible material (including a flame retardant material) is usually used as the fireproof coating material. Specifically, a sodium silicate-based material is particularly preferable as the thermal expansion material, and examples thereof include "Fire Barrier FS-195AA" (trade name: manufactured by Sumitomo 3M Limited). In addition to this, a calcite-based material such as "Fire Barrier M-20" (trade name: manufactured by Sumitomo 3M Ltd.) and a graphite-based material such as "Intumex" (trade name: manufactured by Chemie Linz) can be used. .

These thermal expansion materials have a predetermined noncombustibility or flame retardancy and also have the property of thermally expanding, and normally, the entire surface of the sealing portion which comes into contact with the air layer of the double glazing is covered. Even if it is not completely covered, it expands when heated and substantially covers at least the entire surface of the sealing portion of the double glazing.

As the non-combustible material, a chloroprene flame-retardant rubber such as "Neoprene" (trade name: manufactured by DuPont),
Alumina-silicate fiber molded sheet and other inorganic materials can be appropriately used. In the case of these non-combustible materials, it is necessary to cover the entire exposed surface of the seal part that comes into contact with the air layer in advance, and these are directly or in advance processed into a sheet shape and then coated or adhered. To wear.

These fireproof coatings are provided directly on a part or all of the inner peripheral surface of the seal portion in contact with the air layer of the double glazing or by utilizing the spacer portion exposed to the air layer. be able to. That is, it is fixed to the vicinity of the seal portion in contact with the air layer of the double glazing either directly or via an adhesive or the like.

When the covering member is a thermal expansion material, the contact surface with the air layer of the seal portion should be covered by the expansion effect when heated, so that the entire surface must be covered from the beginning. Although it does not exist, it is sufficient to place it in the prescribed area of the seal part and spacer in consideration of the coefficient of thermal expansion. On the other hand, in the case of a non-combustible material, it is arranged so as to cover the entire contact surface of the seal portion with the air layer in advance. In this case, for example, even if the metal spacer is exposed in the air layer,
Since this spacer portion has a fire shielding effect by itself, it may be excluded from the object of coating.

In the present invention, as to how the fireproof coating material is provided, as described above, an appropriate method can be selected depending on the sealing structure of the double glazing and the kind of the fireproof coating material and the like. . And, although dry air is usually enclosed in the air layer, a gas other than air may be put in, and the same can be applied to double-layered glass using three or more glasses, and if necessary. The fireproof coating can be colored.

As the sealing material, a primary sealing material and a secondary sealing material are usually used together, but a single sealing material may be used. Also, for example, in the case of an adhesive spacer in which a desiccant is mixed in a spacer made of synthetic resin such as butyl rubber, the spacer itself has both adhesiveness and sealing property, so a sealing material is unnecessary. The spacer becomes the sealing material.

[0016]

1 is a cross-sectional view of a peripheral edge portion of a fireproof double glazing according to an example of the present invention. In the figure, 1 is a fire-proof glass made of low-expansion glass, 2 is a normal glass made of float glass, and a butyl rubber 1 is made by interposing a metal spacer 5 containing a desiccant between these glasses. By adhering with a secondary sealing material 6, a multi-layer glass having an air layer 3 of 12 mm was formed, and a secondary sealing material 7 made of polysulfide was filled in the outer peripheral edge portion of the multilayer glass for complete sealing. Then, on the surface of the spacer 5 in contact with the air layer 3, the fire barrier FS-195AA
A thermal expansion material 4 made of (trade name: manufactured by Sumitomo 3M) was previously arranged with a width of about 4/6 of the air layer 3.

When this multi-layer glass is held by a frame and heated from the fire protection glass 1 side, the thermal expansion material 4 expands to cover the entire inner peripheral surface of the seal portion exposed to the air layer 3,
As a result, even if the glass 2 on the non-heated side was broken, not only the primary seal material 6 itself burned but also the gas generated from this primary seal material did not burn.

FIG. 2 shows another embodiment of the present invention. When the fireproof glass 1 and the ordinary glass 2 and the metal spacer 5 are bonded to each other with the primary sealing material 6, a gap is created on the side of the air layer 3 without bonding the entire surfaces, and the noncombustible material 8 is placed in this gap.
To cover the exposed surface of the sealing material 6.

Further, in FIG. 3, the metal spacer 5 itself plays the role of a covering member, which is not common as compared with the above-mentioned type in which the fireproof covering material is adhered, but a fireproof glass and a flammable material are used. The object of the present invention is obtained in combination with a sealing material.

[0020]

As described above, according to the present invention, since a fireproof covering material made of a thermal expansion material or a noncombustible material is arranged on the inner peripheral surface of the seal portion which contacts the air layer of the fireproof double glazing, in the event of a fire. Even if the seal part is heated, in the case of a thermal expansion material, the expansion effect covers the seal part, and in the case of a non-combustible material, the exposed surface of the flammable seal material is always covered. Even if the glass of the glass breaks, it is possible to prevent combustion of the seal material or combustion of gas generated from the seal material, and it is possible to prevent a fire from occurring on the non-heated surface due to these, and the effect is great. is there.

[Brief description of drawings]

FIG. 1 is an end sectional view of a fireproof double glazing according to the present invention.

FIG. 2 is an end cross-sectional view of a fireproof double glazing showing another embodiment of the present invention.

FIG. 3 is an end sectional view of a conventional fireproof double glazing.

[Explanation of symbols]

 1: Fireproof glass 2: Normal glass 3: Air layer 4: Covering member 5: Spacer 6, 7: Sealing material

Claims (3)

[Claims] 1. At least one glass is made of fireproof glass such as meshed glass, low expansion tempered glass, and transparent crystallized glass, and a plurality of glasses are arranged so as to obtain an air layer therebetween. A double-layered glass whose peripheral portion is hermetically sealed with a sealing material, wherein a fire-proofing coating material is provided on a part or all of the inner peripheral surface where the sealing portion of the double-layered glass contacts the air layer. Layered glass. 2. A fireproof coating material is a sodium silicate type, a vermiculite type,
The fireproof double glazing according to claim 1, which is a thermal expansion material composed of at least one selected from graphite materials. 3. The fireproof double glazing according to claim 1, wherein the fireproof coating material is a noncombustible material.