JP2002080248A - Fireproof glass containing hydrous gel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fireproof glass containing hydrous gel which has sufficient fireproof and sealing performance in the corner area as the center domain or side area by utilizing specific form spacer. SOLUTION: This fireproof glass containing a hydrous gel has a spacer of a U-shaped cross-section, the open side of which is directing toward the center of the fireproof glass containing a hydrous gel, and at a corner position, the U-shaped spacer is bent to a similar shape as the corner in which a part of the spacer parallel with the plate glass is cut and welded to form the bent form spacer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a sealing portion of a fire-resistant glass containing a hydrogel in which a hydrogel is filled between transparent substrates.

[0002]

2. Description of the Related Art In the event of a fire in a building, there is a need for a window member which has fire-proofing properties such as protection against the propagation of a flame, a barrier against the diffusion of smoke, and a shield against radiant heat.

[0003] In response to the aforementioned requirements, netted glass is used for windows for fire doors. Recently, besides netted glass,
Gel-containing double-glazed structures or various heat-resistant sheet glasses have been proposed for windows on the outer walls of buildings, partitions in rooms, or windows provided in doors such as passageways.

[0004] For example, Japanese Patent Publication No. 60-24063 discloses a fire-resistant pane in which two or more glass sheets are arranged in parallel with each other and the space of the glass sheets is filled with a gel, wherein the gel has at least one kind of gel. A liquid containing an acrylic acid derivative, and wherein the gel has a high heat of evaporation, for example, 65 to 95% by weight of water
And a substance that is miscible with the gel and that can form a thermally insulating foam under heat rays, for example, 1 to 20% by weight of a soluble salt selected from the group consisting of alkali metal salts or ammonium salts. Is disclosed.

[0005] For example, Japanese Patent Application Laid-Open Publication No. Hei 3-286058 discloses a structure in which water glass is sealed between a pair of transparent heat-resistant crystallized glasses provided in parallel at a predetermined interval. .

Further, the applicant of the present invention discloses in Japanese Utility Model Application Laid-Open No. 5-63558 a structure of a fire-resistant glass containing a hydrogel in which a hydrogel is filled between two glass sheets.

[0007] Such a fire-resistant glass containing hydrogel needs to be sealed around the periphery with a sealing material. In general, a hole for injecting and degassing the hydrogel is opened in the spacer, sealed with a sealing material, the sealing material at the position of the hole is cut out, and after filling the hydrogel, the injection hole is formed. A method of closing with a screw or the like and closing a cutout portion of the sealing material with a sealing material is employed.

As for the spacer, the sealing performance becomes important, and Japanese Patent Application Laid-Open No. 5-254896 discloses a structure in which the spacer 9 is connected by a joint 10 at the corner of the fire-resistant glass containing hydrogel as shown in FIG. Have been.

[0009]

In a configuration in which a joint is provided at a corner of a spacer, the sealing property of a portion connecting the spacer and the joint is insufficient,
Since the number of parts of the spacer is large, it takes time to manufacture the spacer, and the fireproof glass containing gel becomes expensive.

[0010] In addition, the joint provided at the corner cannot fill the corner portion with the hydrogel up to the vicinity of the edge of the sheet glass, and the fire protection performance of the peripheral portion of the fireproof glass containing the hydrogel is slightly lower than that of the in-plane portion. A problem such as decline occurred.

[0011]

SUMMARY OF THE INVENTION According to the present invention, a peripheral material is sealed by a sealing material via a spacer for keeping two sheets of glass in parallel and keeping a space between the sheets of glass. In the fire-resistant glass containing hydrogel filled with, the cross-sectional shape of the spacer is U-shaped,
The open side of the U-shape is directed to the center of the fire-resistant glass containing hydrogel.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Two glass sheets are opposed to each other via a spacer and are spaced apart in parallel, and a sealed space formed by the two glass sheets and the spacer is filled with a water-containing gel to form a fire-resistant glass containing a water-containing gel. Be composed. FIG. 1 is a plan view of a fire-resistant glass containing a hydrogel, and FIG. 2 is a cross-sectional view thereof.

The two glass sheets 1 are U-shaped spacers 2
U-shaped spacer 2 and sheet glass 1
Are integrated by an adhesive 5, and a groove formed in the outer periphery of the spacer and the sheet glass 1 is sealed by a sealant 6. The sealed space formed by the glass sheet 1 and the spacer is filled with hydrogel.

The sheet glass 1 is an inorganic transparent sheet glass, and is not particularly limited in colorless or colored, and its kind, color tone, shape, etc., but may be bent sheet glass, laminated glass, various tempered glass, semi-tempered or double-strength. Various processed glass such as strengthened glass can be used.
Wired / netted glass, crystallized glass, borosilicate glass or aluminosilicate glass can also be used.

The U-shaped spacer 2 for separating the two glass sheets 1 has a U-shaped cross section. The material is preferably a metal such as aluminum or steel in consideration of easiness of processing and thermal stability, but considering strength and corrosiveness,
Stainless steel is preferred.

The U-shaped spacer 2 is made of molten metal.
It may be formed by a drawing method or by bending a rectangular flat plate at a right angle.

The spacer 2 having a U-shaped cross section is bent at the corner portion of the fire-resistant glass containing hydrogel, and is desirably formed as a single body for sealing performance.

As shown in FIG. 2, the U-shaped spacer 2
If the open side of the U-shape is directed to the center of the sheet glass and the hydrogel is filled as close as possible to the periphery of the sheet glass, the fire protection performance near the peripheral end is also the same as the center part Therefore, it is preferable that the open side of the U-shape of the spacer is directed toward the center of the glass sheet.

The U-shaped spacer near the corner is
In the same way as the shape of the corner of the sheet glass, fire prevention performance is secured also at the corner. That is, if the two sides forming the corners of the sheet glass are at right angles, the U-shaped spacer 2 is also at a right angle, if it is an acute angle, it is also an acute angle, and if it is an arc curve, it is almost the same as the curvature of the arc. It is a bent shape.

When the open side of the U-shaped spacer is bent so as to face the center of the glass sheet, the portion of the U-shaped spacer to be brought into contact with the glass sheet is compressed, and wrinkles are formed. Is inadequate, causing problems with sealing.

For this reason, it is desirable that the corners of the U-shaped spacer are notched at the portion to be adhered to the U-shaped plate glass and are bent, and the corners are formed like a rectangular window or a triangular window. Is a shape in which two sides intersect, as shown in FIG. 3, in the U-shaped spacer 2 ′ before bending, a portion 7 to be bonded to the plate glass is cut off at an angle θ1 (FIG. 3A). . The angle θ1 is θ1 = 180 ° −θ, where θ2 is the angle at which the two sides intersect.
2 angle. The U-shaped spacer is bent at an angle θ2 at the cut-out portion (FIG. 3B). In the bent U-shaped spacer (FIG. 3B), it is desirable that the abutting portion 8 of the portion 7 to be bonded to the sheet glass is welded.

The fire-resistant glass containing hydrogel produced using the above-described U-shaped spacer is as shown in FIG.

The corner portion of the fireproof glass containing the hydrogel is
In the case of an arc, as shown in FIG. 5 (c), the portion 7 of the spacer to be bonded to the plate glass is cut out and bent at least with the length L of the arc, and a plate having the same outer length L as the arc (FIG.
(D)), as shown in FIG. 5 (e), a portion 8 ′ where the plate (d) is in contact with (c) is welded and integrated.

It is desirable that the material of the plate (d) is the same as the material of the spacer. In addition, the thickness is set to be equal to or less than the thickness of the portion 7 of the U-shaped spacer to be bonded to the plate glass.

The spacer and the plate glass are preferably bonded with a non-water-permeable and tacky adhesive of a synthetic rubber type such as polyisobutylene, polyisobutylene-butyl or butyl. In addition, silica, white carbon, titanium oxide, magnesium silicate, aluminum silicate, etc. as a reinforcing filler in the adhesive usually, unsaturated hydrocarbon-based resin, chroman resin, terpene resin, rosin derivative, etc. as a tackifier,
In addition, a desiccant and the like can be appropriately added. Even if the vitreous plate deforms due to fluctuations in the outside air pressure or expansion and contraction of the aqueous gel, the adhesive can hold the adhesive in a wide temperature range with an adhesive force, and prevents escape of the aqueous medium in the aqueous gel. And maintain long-term stability.

Further, the outer periphery of the spacer is sealed with a similar synthetic rubber-based sealing material, for example, a sealing material such as silicone-based, polysulfide-based rubber, polyurethane-based, or polybutadiene-polystyrene-based rubber. A filler such as heat-resistant inorganic material powder and other additives can be appropriately mixed into the sealing material. The sealing material, of course, also has tackiness, but is an important component particularly for firmly holding the glass sheet and the spacer and more completely blocking the aqueous gel from the outside.

Hydrous gels include acrylic synthetic polymers such as sodium acrylate vinyl alcohol copolymer, saponified polyacrylonitrile polymer, and polyvinyl alcohol synthetic polymers such as polyvinyl alcohol crosslinked polymer. And water and an inorganic substance such as silica, which are appropriately blended, for example, 50 to 60% by weight of water and 10 to 20% by weight of an acrylic superabsorbent monomer such as sodium polyacrylate. %, 20 to 30% by weight of an inorganic substance such as silica.

The above-mentioned solution of hydrogel is filled into a closed space formed by two glass plates and a spacer through an injection hole formed in the spacer, and irradiated with ultraviolet rays to be crosslinked and hardened.

The injection hole is preferably sealed with a plug made of a sealing material, a polymer such as acrylic or polyester, or a metal. The injection hole may be provided at any position from the center of the side of the fire-resistant glass containing hydrogel to the vicinity of the corner.

The glass sheet and the hydrogel may be appropriately changed in thickness and the like into a plurality of layers, and a transparent organic plate such as polycarbonate or an acrylic plate may be used instead of the glass sheet.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view showing a fire-resistant glass containing hydrogel produced according to the present invention. FIG. 2 is a cross-sectional view taken along line aa ′ of the fire-resistant glass containing hydrogel of FIG.

Two clear float glass sheets 1 having a thickness of 5 mm, a short side of 900 mm and a long side of 1800 mm 1
The end of 1 ′ was stuck with a butyl-based adhesive 5 using a U-shaped spacer 2 to form a space.

The corners of the U-shaped spacer 2 are as follows:
As shown in FIG. 5, a portion 7 to be bonded to the sheet glass in a bent portion of the corner portion was cut out, and a bending process was performed at a curvature of 95 mm. Further, the plate (2) was welded at 8 'as shown in (e), and the spacers at the corners were also U-shaped.

The height H of the U-shaped spacer 2 is about 19
mm, the width W was about 7 mm, and the thickness t was about 1 mm. The open side of the U-shape was directed toward the center of the glass sheet.

The above-mentioned U-shaped spacer is formed by joining one linear cut using a metal tape,
One body was provided with an injection hole 4 for injecting a solution of a hydrogel.

A space is formed by the two glass sheets and the U-shaped spacer 2, and the space between the U-shaped spacer 2 and the outer periphery of the glass sheet 1 is formed except for the injection hole 4, which communicates the space with the outside air. The grooves were filled with a silicon-based sealing material 6 to form a double-layered glass-like structure for sealing a space formed by the plate glass 1 and a U-shaped spacer.

In the sealed space, water 50 is injected through the injection hole 4.
６０60% by weight, 10-20% by weight of an acrylic super-absorbent monomer such as sodium polyacrylate, and 20-30% by weight of an inorganic substance such as silica are mixed, and a hydrogel 3 is injected. The screw was closed, and the periphery of the screw was sealed with the same silicone-based material as the sealing material.

After sealing, the hydrogel 1 was cured using an ultraviolet lamp of 120 W to obtain a fireproof glass containing the hydrogel.

[0040]

According to the fire prevention glass containing water-containing gel of the present invention, since the spacer is integrated, there is no leakage of the water-containing gel due to poor sealing of the sealing material, and the number of parts of the spacer is small. Improved. In addition, the presence of the hydrogel in the vicinity of the edge of the plate glass including the corner portion improved the fire protection performance of the peripheral portion of the fire-resistant glass containing the hydrogel.

[Brief description of the drawings]

FIG. 1 is a plan view of a double-glazed glass sheet containing water according to the present invention.

FIG. 2 is a cross-sectional view of the double-glazed glass containing hydrogel shown in FIG.

FIG. 3 is a plan view (a, b) and a cross-sectional view of a spacer in the case of a corner where two straight lines intersect at 90 °.

FIG. 4 is a corner portion of a double-glazed glass containing hydrogel using the U-shaped spacer of FIG. 3;

FIG. 5 is a plan view (C, E) and a cross-sectional view of the spacer when the corner portion is a circular arc.

FIG. 6 is a plan view of a conventional double-glazed glass sheet containing water.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheet glass 2 U-shaped spacer 3 Water-containing gel 4 Injection hole 5 Adhesive 6 Sealing material 7 Portion of U-shaped spacer bonded to plate glass 8, 8 'Welding point 9 Spacer 10 Joint

Continued on the front page (72) Inventor Kazuya Kobayashi 1510 Oguchi-cho, Matsusaka-shi, Mie Central Glass Co., Ltd. F-term in Glass Laboratory (reference) 2E016 AA01 BA09 CA01 CB01 CC02 EA03 2E039 BA07 BA08 4G061 AA28 BA01 CA02 CB02 CB04 CB06 CB12 CB16 CB18 CD02 CD13 CD16 CD22 CD25 DA22 DA51

Claims (1)

[Claims] 1. A hydrated gel in which two plate glasses are spaced apart in parallel and a peripheral portion thereof is sealed with a sealing material via a spacer for keeping a gap between the plate glasses, and a hydrated gel is filled between the plate glasses. A fire-resistant glass containing hydrogel, wherein the cross-sectional shape of the spacer is a U-shape, and the open side of the U-shape is directed toward the center of the fire-resistant glass containing the hydrogel.