JPH061640A - Fire resisting glass panel - Google Patents

Abstract

PURPOSE:To inexpensively assemble a fire resisting glass panel with excellent workability having excellent fire resisting characteristics by sticking and fixing plural glass panels (where, one or more pieces are borosilicate glass) with a both-face adhesive tape to face each other and enclosing a hydrogel in the space. CONSTITUTION:Each of a transparent glass panels 17, 18 (e.g. low expansive crystalline glass, soda-lime glass) is opposedly provided by sticking and fixing to the both side of the borosilicate glass 16 of one piece (20-40X10<-7>/ deg.C coefficient of thermal expansion at 30-750 deg.C) at about 1mm interval with the both-face adhesive tape 21, 22 (for example, a material coated with an acrylic adhesive on the both sides of acrylic resin base material) and the hydrogel 19, 20 (for example, a material composed of alkali silicate aq. solution and a silica particle having <=50nm particle diameter, 4-37wt.% in total silica conc. and >=60wt.% water content) is enclosed into the space of each glass panel. A transparent film for preventing splashing is stuck at least to the inside face of the outside glasses 17, 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire-resistant glass panel, and more specifically, to a fire door used for partitioning or opening of a building to prevent the spread of fire or the spread of smoke during a fire. It relates to a refractory glass panel used.

[0002]

2. Description of the Related Art Conventionally, transparent low-expansion crystallized glass plates and borosilicate glass plates have been used as fire-resistant glass used in fire doors, and these glass plates are exposed to high temperatures during a fire. Even if it is hit, it does not crack and it is possible to shield the flame.

However, the low expansion crystallized glass plate and the borosilicate glass plate continue to maintain transparency even at high temperature,
Since the heat ray is transmitted, the temperature of the atmosphere on the non-heating side also gradually rises, which may eventually ignite the combustible material on the non-heating side.

Under these circumstances, various types of fire-resistant glass panels have been proposed in which a plurality of glass plates are placed opposite to each other at regular intervals, and a foaming hydrogel is sandwiched between the glass plates. In Japanese Patent Application No. 4-21908, a person also interposes a spacer adhered and fixed with a sealing material between the periphery of a plurality of glass plates, encloses a hydrogel in the gap between the glass plates, and forms at least one of the glass plates. Proposes a fire resistant glass panel made of a low expansion crystallized glass plate.

When such a fire-resistant glass panel is used as a fire door, when exposed to a high temperature during a fire, the hydrogel becomes opaque due to foaming and does not transmit heat rays. It is possible to suppress the rise.

[0006]

[Problems to be Solved by the Invention] However, Japanese Patent Application No. 4
-The 21908 fire-resistant glass panel uses a spacer made of crystallized glass, ceramics, or metal, so an adhesive is required to bond the glass plates to the spacers, and the bonding work is very complicated. Is.

Further, in this fire resistant glass panel, spacers are arranged and adhered between glass plates having different thermal expansion coefficients, so that when placed in an environment where the temperature changes, thermal strain is generated near the spacers. There is a possibility that it may occur and the good adhesion state may not be maintained.

The present invention has been made in view of the above circumstances, and does not crack even when exposed to high temperatures during a fire.
The flame can be shielded, the work of bonding the spacers with an adhesive is not required, and glass plates with different thermal expansion coefficients are used, and even in an environment where the temperature changes greatly, a good adhesion state It is an object of the present invention to provide a fire resistant glass panel that maintains

[0009]

In a fire resistant glass panel of the present invention, a plurality of transparent glass plates are adhered and fixed at regular intervals by a double-sided adhesive tape interposed around the opposite surfaces. It is characterized in that hydrogel is enclosed in a gap between the glass plates, and at least one glass plate is made of borosilicate glass.

The hydrogel used in the present invention is obtained by mixing silica particles in an aqueous alkali silicate solution, but in order to obtain excellent heat insulation properties, the hydrogel has an average particle size different from that of the aqueous alkali silicate solution. It is desirable to use a hydrogel composed of silica particles of 50 nm or less, having a total silica concentration of 4 to 37% by weight and a water content of 60% by weight or more.

The borosilicate glass plate used in the present invention is formed into a plate shape by an ordinary float method, down draw method or up draw method, and is formed at 20 to 40 × 10 ^-7 / ° C. (3
Those having a coefficient of thermal expansion of 0 to 750 ° C. and excellent surface quality are suitable.

In the present invention, all the glass plates may be formed of borosilicate glass plates, but it is also possible to form a panel by combining with a transparent low expansion crystallized glass plate or soda-lime glass plate. .

The low-expansion crystallized glass plate is a glass plate whose thermal expansion at the time of a fire is close to zero, and in terms of weight percentage, Li
₂ O 3-5%, Al ₂ O ₃ 20-35%, SiO ₂
55-70%, TiO ₂ 1-3%, ZrO ₂ 1-4
%, P ₂ O ₅ 1-5%, Na ₂ O 0-4%, K ₂ O
0-4%, consists _{Na 2 O + K 2 O 0.5~4} %,
β-quartz solid solution crystals are deposited, and -10 to 15 x 10 ^-7 /
A transparent crystallized glass having a coefficient of thermal expansion of ° C is preferable because it has extremely excellent fire resistance.

Soda-lime glass plates are usually formed by the float method and have a coefficient of thermal expansion of 80 to 90 × 10 ^-7 / ° C., which is much higher than those of glass plates produced by other forming methods. It is characterized by having an excellent surface quality.

It is desirable that the double-sided adhesive tape used in the present invention has high adhesiveness and water resistance in addition to having elasticity. It is suitable to use an acrylic or silicone adhesive applied on both sides of a base material made of silicone resin.

This double-sided adhesive tape is attached to the periphery of a glass plate. When glass is adhered using this, a double-sided adhesive tape forms a hydrogel injection hole or a degassing hole. Make a notch so that it sticks on the glass plate almost all around.

In the case of the fire-resistant glass panel of the present invention, when the hydrogel starts to release water during a fire, the surrounding double-sided adhesive tape is peeled off and the water vapor inside escapes. If a gas vent hole is provided in the hole and a tape with lower heat resistance than the double-sided adhesive tape is attached to the opening of the hole, for example, even if the hydrogel expands while releasing water during a fire, the tape will not heat. As a result, the adhesive force is lost and the gas vent hole is opened, so that the water vapor generated inside the panel easily escapes to the outside.

The fire-resistant glass panel of the present invention is used in the case of a panel using two glass plates, on the inner surface of both glass plates, and in the case of a panel using three or more glass plates. By attaching a transparent film for preventing scattering to at least the inner surfaces of the two outer glass plates, even if the glass plates are damaged by mechanical impact, a through hole will be generated or fragments will fall. Without doing
It is possible to add safety performance in addition to fire resistance.

When a transparent film for preventing scattering is attached to the surface of the glass plate, for example, a method of attaching the transparent film with an adhesive over the entire surface of the glass plate or a double-sided adhesive tape on the surface of the glass plate is attached. A method is used in which the transparent film is attached with an adhesive except for the above-mentioned parts.

According to the former method, the glass plates are adhered to each other with the double-sided adhesive tape through the transparent film, and according to the latter method, the glass plates are directly adhered to each other with the double-sided adhesive tape. become.

As a material of the transparent film for preventing scattering, a fluorine resin, a polyester resin or a polyurethane resin is suitable because of its toughness and high transparency.

[0022]

The fire-resistant glass panel of the present invention has the above-mentioned structure, so that various excellent actions as described below can be obtained.

When a fire occurs near the fire-resistant glass panel and is exposed to a high temperature, the hydrogel gradually releases water to take heat, and after the water content of the hydrogel evaporates, an opaque ceramic is formed. Since it becomes a porous body and reduces the transmission of heat rays, the temperature rise on the non-heated side is suppressed.

Since at least one glass plate is made of borosilicate glass, the ceramic-like porous body formed inside tentatively sinters or melts due to heating for a long time and loses its heat insulating property. Even in case, fire resistance is not easily impaired.

Since the peripheries of the facing glass plates are adhered by the double-sided adhesive tape and no spacer is required, the adhering work is very simple and the weight can be reduced.

Since the double-sided adhesive tape is highly stretchable, it adheres glass plates having different thermal expansion coefficients, and the tape absorbs thermal strain even in an environment where the temperature changes, so that a good adhesive state is maintained. Excellent structural stability is obtained.

Safety performance can be imparted by sticking a transparent film for scattering prevention to the inner surfaces of the two outer glass plates, and when three or more glass plates are used. Further, by attaching the transparent film to not only the outer glass plate but also the inner glass plate, it becomes possible to impart higher safety performance.

[0028]

EXAMPLES The fire resistant glass panel of the present invention will be described in detail below with reference to examples.

(Embodiment 1) FIG. 1 shows a schematic cross-sectional view of a refractory glass panel 10 of the present invention.

In the figure, a transparent borosilicate glass plate 11 and a soda-lime glass plate 12 are opposed to each other with a space of 1 mm, and the hydrogel 1 is placed in the space between the glass plates 11 and 12.
3 is enclosed, and the peripheries of the glass plates 11 and 12 are adhered by a double-sided adhesive tape 14.

The borosilicate glass plate 11 is formed into a plate shape by an ordinary updraw method and has a size of 32 × 10.
^It has a coefficient of thermal expansion of ^-7 / ℃ and its dimensions are 914 × 18.
It has a size of 29 × 5 mm and has a good surface quality.

The soda-lime glass plate 12 is formed into a plate shape by an ordinary float method, and is 85 × 10 5.
^It has a coefficient of thermal expansion of ^-7 / ℃ and its dimensions are 914 × 18.
It is 29 × 3 mm, and has a very excellent surface quality.

The hydrogel 13 is prepared by adding silica particles having an average particle size of 10 nm to an aqueous solution containing potassium silicate as a main component having a SiO ₂ / K ₂ O molar ratio of 3.4 to obtain a total silica content. 22% by weight, water content 73% by weight
So that

The double-sided adhesive tape 14 is made by coating an acrylic adhesive on both sides of a base material made of an acrylic resin, and has a thickness of 1 mm and a width of 20 mm.

Hereinafter, a method for manufacturing the fire resistant glass panel 10 will be described.

First, a borosilicate glass plate 11 was prepared, and a double-sided adhesive tape 14 was adhered over substantially the entire circumference of one side thereof.
Next, the double-sided adhesive tape 14 is attached to the soda-lime glass plate 12
The borosilicate glass plate 11 and the soda-lime glass plate 1 by adhering the borosilicate glass plate 11 so as to overlap it.
2 are opposed to each other via the double-sided adhesive tape 14 at a predetermined interval, and a panel having a small hole (not shown) due to the absence of the double-sided adhesive tape 14 is formed in part. Then, the raw material solution of the hydrogel is injected from the small hole of this panel, and then the small hole is closed with the double-sided adhesive tape 14,
The refractory glass panel 10 was produced by keeping it at room temperature for 30 hours to gelate the solution.

According to such a manufacturing method, the borosilicate glass plate 11 and the soda-lime glass plate 12 are attached to the double-sided adhesive tape 1
Since it adhered by No. 4, the adhesion work was very easy. Further, when the appearance of the fireproof glass panel 10 was observed, it was almost the same as the appearance of one soda-lime glass plate formed by the float method.

Next, the fireproof glass panel 10 was set on a radiant electric heater so that the borosilicate glass plate 11 was on the non-heating side, and a heating test was conducted according to the standard heating curve prescribed in JIS A-1304. I went to After the heating was started, cracks were formed in the soda-lime glass plate 12, but the hydrogel 13 gradually expanded while releasing water without boiling, and changed into a white porous ceramic body,
It showed good heat insulation. Further, 1 hour after the start of heating, the temperature of the electric heater reached 925 ° C., and the soda-lime glass plate 12 on the heating side softened and deformed and fell off, but the surface temperature of the borosilicate glass plate 11 on the non-heating side was It was 300 ° C., and no damage was observed.

(Embodiment 2) FIG. 2 is a schematic sectional view of a fire resistant glass panel 15 according to another embodiment of the present invention.
Soda-lime glass plates 17 and 18 were oppositely arranged on both sides of one borosilicate glass plate 16 with an interval of 1 mm, and each of the glass plates 16, 17 and 18 had a hydrogel 1
9 and 20 are enclosed, and each glass plate 16, 17, 18
The periphery of is adhered by double-sided adhesive tapes 21 and 22.

Glass plates 16, 17, 18 and double-sided adhesive tapes 21, 22 constituting the fire resistant glass panel 15
Is the same as the glass plate used in Example 1, and the hydrogels 19 and 20 are in an aqueous solution containing potassium silicate as a main component and having a SiO ₂ / K ₂ O molar ratio of 3.0. To, by adding silica particles having an average particle size of 20 nm,
The total silica concentration was 25% by weight, and the water content was 70% by weight.

When the appearance of the fire-resistant glass panel 15 was observed, it was almost the same as in Example 1.

Next, this refractory glass panel 15 was used in Example 1 with the soda-lime glass plate 18 on the heating side.
When subjected to the same heating test as above, the same phenomenon as in Example 1 was exhibited, and good heat insulation was exhibited. Further, 1 hour after the start of heating, the soda-lime glass plate 18 on the heating side softened and deformed and fell off, but the soda-lime glass plate 17 on the non-heating side 17
Had a surface temperature of 200 ° C. After 2 hours,
A crack was generated in the soda-lime glass plate 17 on the non-heating side, but no damage was observed in the borosilicate glass plate 16.

(Embodiment 3) FIG. 3 is also a schematic sectional view of a fire resistant glass panel 23 according to another embodiment of the present invention.
Soda lime glass plates 25 and 26 are placed on opposite sides of one borosilicate glass plate 24 with an interval of 1 mm, respectively, and the inner surface of each soda lime glass plate 25 and 26 is made of polyester resin to prevent scattering. The transparent films 27, 28 for use are attached by an acrylic adhesive. Hydrogels 29 and 30 are enclosed in the spaces between the borosilicate glass plate 24 and the glass plates 25 and 26, respectively.
The peripheries of 4, 25 and 26 are adhered by double-sided adhesive tapes 31 and 32. Incidentally, the transparent films 27, 28
Has a thickness of about 50 μm and has double-sided adhesive tapes 31 and 3
It is affixed except for the adhesive portion 2.

The glass plates 24, 25, 26 and the double-sided adhesive tapes 31, 32 constituting the fire resistant glass panel 23.
Are all the same materials used in Example 2,
Hydrogels 29 and 30 are prepared by adding silica particles having an average particle size of 7 nm to an aqueous solution containing potassium silicate having a SiO ₂ / K ₂ O molar ratio of 3.4 as a main component to form all silica particles. The concentration was adjusted to 28% by weight and the water content was adjusted to 65% by weight.

The appearance of this fire-resistant glass panel 23 was observed and found to be almost the same as in Example 2.

Next, this fire-resistant glass panel 23 was subjected to the same heating test as in Example 1 with the soda-lime glass plate 26 on the heating side. showed that. Further, 1 hour after the start of heating, the soda-lime glass plate 26 on the heating side softened and deformed and fell off, but the surface temperature of the soda-lime glass plate 25 on the non-heating side was 190 ° C. After 2 hours, cracks occurred in the soda-lime glass plate 25 on the non-heating side, but no damage was observed in the borosilicate glass plate 24.

Further, this fire resistant glass panel 23 is
When subjected to a shot back test based on the method of ISR-3205, even if the shot back was made to collide from a height of 80 cm, only a crack was generated in the soda lime glass 25 on the impact side, and a through hole or a fragment was generated. No fall occurred.

(Embodiment 4) FIG. 4 also shows a schematic sectional view of a fire resistant glass panel 33 according to another embodiment of the present invention.
Two low-expansion crystallized glass plates 34 are oppositely arranged on both sides with two borosilicate glass plates 35 and 36 facing each other with a gap of 1 mm. Transparent films 37 and 38 made of fluororesin for preventing scattering are attached. Hydrogels 39 and 40 are enclosed in the spaces between the low expansion crystallized glass plate 34 and the borosilicate glass plates 35 and 36, respectively.
The periphery of 6 is adhered by double-sided adhesive tapes 41 and 42. The transparent films 37 and 38 have a thickness of about 50 μm.
The double-sided adhesive tapes 41 and 42 are attached to each other except the adhesive portions.

Borosilicate glass plates 35, 36 and double-sided adhesive tapes 41, 42 constituting the refractory glass panel 33.
Is the same as in Example 3, and the hydrogel 3
Nos. 9 and 40 were prepared by adding silica particles having an average particle diameter of 30 nm to an aqueous solution containing potassium silicate having a SiO ₂ / K ₂ O molar ratio of 3.4 as a main component so that the total silica concentration is Three
The content was 0% by weight and the water content was 66% by weight. The low-expansion crystallized glass plate 34 has a weight percentage of SiO ₂
67%, Al ₂ O ₃ 23%, Li ₂ O 4%, Ti
O ₂ 2%, ZrO ₂ 3%, P ₂ O ₅ 1%,
Precipitate β-quartz solid solution crystals and -3 × 10 ^-7 ° C (30-
750 ° C.) and has a thermal expansion coefficient of 914 × 1829 × 5
The one having a dimension of mm was used.

When the appearance of the fire-resistant glass panel 33 was observed, it was almost the same as in Example 1.

Next, when this refractory glass panel 33 was subjected to the same heating test as in Example 1 with the borosilicate glass plate 36 on the heating side, it exhibited substantially the same phenomenon as in Example 1 and had good heat insulation properties. showed that. The surface temperature of the borosilicate glass plate 35 on the non-heating side is 190 ° C. 1 hour after the start of heating, and the borosilicate glass plate 36 on the heating side softened and deformed after 2 hours, but the other glass plate 34, No damage was observed on 35.

Further, this fire resistant glass panel 33 was subjected to the same shot back test as in Example 3 and found to be 80
Even when the shot back was made to collide from a height of cm, only a crack was generated in the borosilicate glass plate 35 on the impact side, and the through holes and the fragments were not dropped.

[0053]

INDUSTRIAL APPLICABILITY As described above, the fire-resistant glass panel of the present invention has excellent fireproof performance, can be assembled with good workability, and has excellent structural stability, so that it is used as a fire door. Suitable as a fire resistant glass panel.

Further, by attaching a transparent film for scattering prevention to the inner surface of at least two glass plates on the outer side, it becomes possible to impart safety.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a fire resistant glass panel of the present invention.

FIG. 2 is a schematic cross-sectional view of a fire resistant glass panel according to another embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view of a fire resistant glass panel according to another embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view of a fire resistant glass panel according to another embodiment of the present invention.

[Explanation of symbols]

10, 15, 23, 33 Fire-resistant glass panel 11, 16, 24, 25, 26 Borosilicate glass plate 12, 17, 18, 27, 28 Soda-lime glass plate 13, 19, 20, 29, 30, 39, 40 Hydrogel 14, 21, 22, 31, 32, 41, 42 Double-sided adhesive tape 27, 28, 37, 38 Transparent film 34 Low expansion crystallized glass plate

Claims (3)

[Claims] 1. A plurality of transparent glass plates are bonded and fixed to each other at regular intervals by a double-sided adhesive tape interposed around the opposite surfaces, and a hydrogel is provided in the space between the glass plates. A refractory glass panel, characterized in that it is enclosed and at least one glass plate is made of borosilicate glass. 2. The hydrogel comprises an aqueous alkali silicate solution and silica particles having an average particle size of 50 nm or less, the total silica concentration is 4 to 37% by weight, and the water content is 60% by weight or more. The fire resistant glass panel according to claim 1. 3. The fire-resistant glass panel according to claim 1, wherein a transparent film for preventing scattering is attached to the inner surface of at least two outer glass plates.