JP4936190B2 - Fire protection glass - Google Patents

Description

  The present invention relates to fire glass.

  Conventionally, float glass has been frequently used for glass windows, glass doors, glass walls and the like of buildings such as ordinary houses and office buildings. However, while this float glass has the great advantage of being inexpensive, it is easy to crack and fall off when heated at a high temperature in the event of a fire, and it cannot be expected to suppress the spread of fire by blocking flames and smoke. There were drawbacks.

  On the other hand, for example, a mesh-like wire is embedded in the glass window, glass door, glass wall, etc. of the building so that the glass is held by the wire and does not fall off even if cracks occur in the event of a fire. In many cases, a heat-strengthened glass having excellent heat resistance is formed by forming a meshed glass or a pure silicic acid anhydride as a component. However, while meshed glass and heat-resistant tempered glass can prevent the glass from falling off and suppress the spread of fire, it is very expensive compared to float glass, and radiant heat in the event of a fire. May propagate through the glass and propagate from the fire side to the non-fire side, causing fire spread. In addition, in a glass with a mesh, since a mesh-like wire embedded in the glass can be seen during normal use, the effects originally expected for this type of glass, such as the feeling of openness of the space and the continuity between the spaces, are impaired. There was a problem.

On the other hand, as shown in FIG. 3 and FIG. 4, for example, a plurality of glasses 1 having the same thickness are stacked at intervals, and liquid sodium silicate (water glass) 2 is sealed between adjacent glasses 1 to form a composite. There is a fireproof glass A constituted by layer vitrification (see, for example, Patent Document 1). In this fireproof glass A, when heated at a high temperature in the event of a fire, the enclosed sodium silicate foams and exhibits flame barrier properties, so that it is possible to prevent the non-fire side glass 1 from cracking and to expand the fire. Can be suppressed. In addition, since the sodium silicate 2 that is transparent when encapsulated foams and changes to opaque (white), it is possible to prevent radiant heat from propagating from the fire side to the non-fire side, and to prevent the non-fire side from spreading. It becomes possible to prevent the spread of fire without fail.
JP-A-3-286058

  However, since the conventional fireproof glass A is constructed by sealing liquid sodium silicate 2 between adjacent glasses 1, it is robust for preventing leakage of the sodium silicate 2 around the fireproof glass A. It was necessary to take measures for sealing (sealing member) 4.

  In addition, when flow glass is used for each glass 1 having the same thickness, for example, the thickness H of the fire prevention glass A becomes as large as twenty millimeters, and a thickness H on the order of several millimeters is required. In many architectural designs, there is a problem that the place of use is extremely limited. At this time, it is conceivable to reduce the number of laminated layers to meet the requirement of a thickness H on the order of several millimeters. In this case, since one float glass 1 itself is thin and has a small heat capacity, The risk of the float glass 1 melting and dropping off in the event of a fire increases. For this reason, there has been a problem that it is difficult to ensure the flameproofness of, for example, about 20 minutes required for this type of fireproof glass A by reducing the number of laminated layers.

  In view of the above circumstances, the present invention has an object to provide a fireproof glass that can easily or eliminate the need for sealing sodium silicate, is inexpensive and uses a float glass, and has excellent flame barrier properties. To do.

  In order to achieve the above object, the present invention provides the following means.

The fireproof glass of the present invention is a first float glass and a second glass that is formed with a thickness smaller than that of the first float glass, and is laminated in parallel with a gap on at least one surface side of the first float glass. A float glass, and a jelly-like sodium silicate layer interposed between the first float glass and the second float glass, and the second float when heated at a temperature at which the sodium silicate layer begins to foam It is characterized in that the glass is formed so as to be cracked .

  In the present invention, the sodium silicate layer is made to be jelly-like by lowering the water to around 50, while the water is conventionally around 150 with respect to the sodium silicate 100 by weight ratio. There is no leakage of sodium silicate outside, and compared with the case where conventional liquid sodium silicate is sealed between adjacent glasses, the sealing measures provided around the fireproof glass can be simplified, or the sealing measures can be taken. It can be made unnecessary. Moreover, it becomes possible to make it function as an adhesive layer which bonds 1st float glass and 2nd float glass by making a sodium-silicate layer into a jelly shape in this way. This makes it possible to reduce the cost of the fireproof glass, and to make the fireproof glass highly reliable with no sodium silicate leakage over a long period of time.

  And in this fire-proof glass, when a sodium silicate layer is heated and foamed through a 2nd float glass at the time of a fire, flameproofness (heat insulation) is exhibited, and the 1st float glass is damaged by the heat of a fire. Can be suppressed. In addition, for example, when heated continuously at a high temperature close to 800 ° C. for a long time, the foamed sodium silicate layer may melt and cracks may occur in the first float glass. Even when cracks occur, the sodium silicate layer adheres to the first float glass, and the sodium silicate layer enters the cracks due to foaming, so that the first float glass can be reliably prevented from falling off. Thereby, a flame and smoke can be reliably interrupted | blocked with a fireproof glass, and it can prevent that a fire spreads to the non-fire side. Furthermore, such a sodium silicate layer is transparent in normal times, foams in a fire, and changes to opaque (white), so that it is possible to block radiant heat at the time of fire, and the fire spreads to the non-fire side Can also be prevented.

  Moreover, in this fire protection glass, since the second float glass is for protecting the sodium silicate layer and maintaining its moisture content, it can be made extremely thin with a smaller thickness than the first float glass. is there. For this reason, it becomes possible to make the thickness of fire prevention glass small, and it becomes possible to reduce the restriction | limiting of a use place.

  Furthermore, it becomes possible to reduce the cost of fire prevention glass by comprising combining the cheap 1st and 2nd float glass, and a cheap sodium silicate (silicate sodium layer).

  According to the fire glass of the present invention, by making the sodium silicate layer in a jelly shape, it is possible to simplify or eliminate the need for sealing of sodium silicate, and by combining the float glass and the sodium silicate layer. It is possible to provide a fireproof glass that is inexpensive and excellent in flame barrier properties.

  Hereinafter, with reference to FIG.1 and FIG.2, the fire prevention glass which concerns on one Embodiment of this invention is demonstrated. The present embodiment relates to fireproof glass obtained by laminating float glass frequently used for glass windows, glass doors, glass walls, and the like of buildings such as ordinary houses and office buildings.

  As shown in FIGS. 1 and 2, the fireproof glass B of the present embodiment is spaced apart from the inner float glass (first float glass) 5 on one side 5 a and the other side 5 b of the inner float glass 5. A pair of surface float glass (second float glass) 6 and 7 laminated in parallel with each other, and an internal float glass 5 and a sodium silicate layer 8 interposed between the surface float glasses 6 and 7. It is formed in a square shape.

  The internal float glass 5 is a transparent float glass, and is formed with a thickness H1 of about 6 mm, for example. The pair of surface float glasses 6 and 7 are transparent float glasses, and are formed thinner than the internal float glass 5 with a thickness H2 of, for example, 2 mm or less. Further, these surface float glasses 6 and 7 protect the sodium silicate layer 8 and also prevent the sodium silicate layer 8 from being dried, that is, prevent the sodium silicate layer 8 from being dried and keep its moisture content in a predetermined state. Is provided.

  On the other hand, the sodium silicate layer 8 is made of transparent sodium silicate and has a thickness H3 of about 1 mm. In addition, the sodium silicate layer 8 of the present embodiment is not liquid as in the prior art, and is in a jelly shape by setting the water to about 50 with respect to the sodium silicate 100 by weight ratio. Thus, the sodium silicate layer 8 made of jelly-like sodium silicate functions as an adhesive layer for integrally bonding the internal float glass 5 and the surface float glasses 6 and 7 together. Moreover, since it becomes difficult to leak out sodium silicate outside the fire prevention glass B by being jelly-like, compared with the case where the conventional liquid sodium silicate is enclosed between the adjacent glasses 1, the periphery of the fire prevention glass B The sealing measures provided in the case are simplified or no sealing measures are required.

  Fireproof glass B configured as described above is configured by combining ordinary float glass 5, 6, 7 with a fraction of float glass 5, 6, 7 and inexpensive sodium silicate (silicate sodium layer 8). Thus, cost reduction is achieved. Moreover, since the surface float glass 6 and 7 protects the sodium silicate layer 8 and only the function of ensuring the water retention state of the sodium silicate layer 8 is expected, the surface float glass 6 and 7 has a thickness of 2 mm or less, for example. By forming an extremely thin film with a thickness H2, the fire glass B can be formed with a thickness H on the order of several millimeters. Thereby, the fire prevention glass B of this embodiment has few restrictions of a use place, and can be reliably used for the glass window of a building, a glass door, a glass wall, etc. Moreover, in the fire protection glass B of this embodiment, since the internal float glass 5, the surface float glass 6, 7 and the sodium silicate layer 8 are each transparent, such as a feeling of openness of space and a feeling of continuity between spaces during normal use. The effect is not impaired.

  When a fire occurs in a building, the surface float glass 6 (7) on the fire side is heated, and the surface float glass 6 (7) formed extremely thin cracks as it reaches a temperature of around 100 ° C. . At the same time, the sodium silicate layer 8 is foamed by heating at around 100 ° C., and its thickness H3 is increased to start exhibiting flame barrier properties (heat insulation properties, fireproof performance). At this time, since the surface float glass 6 (7) is cracked by heating at a temperature of about 100 ° C. at which the sodium silicate layer 8 begins to foam, the surface float glass 6 (7) hinders foaming of the sodium silicate layer 8. There is nothing, and the flameproofness is exhibited by the foaming of the sodium silicate layer 8 with certainty.

  Even when heated at a high temperature close to 800 ° C. from the fire side, heat (flame) is blocked by the foamed sodium silicate layer 8 and the internal float glass 5 is prevented from being damaged due to the fire. On the other hand, if the foamed sodium silicate layer 8 is somewhat melted or cracked in the internal float glass 5 when continuously heated at a high temperature close to 800 ° C. for a long time, the sodium silicate layer 8 Exhibits a flame barrier property by the foaming and also exhibits an adhesion property to adhere to the internal float glass 5. For this reason, the internal float glass 5 is reliably prevented from falling off because the sodium silicate layer 8 is adhered, and the sodium silicate layer 8 is cracked by foaming. Thereby, a flame and smoke are interrupted | blocked reliably and it is suppressed that a fire spreads to the non-fire side. At this time, the silicate heat layer 8 is changed from transparent to opaque (white) with foaming, so that the radiant heat is blocked and the spread of fire on the non-fire side is also prevented.

  Therefore, in the fireproof glass B of this embodiment, by making the sodium silicate layer 8 into a jelly shape, no sodium silicate leaks out of the fireproof glass B, and the conventional liquid sodium silicate 2 is adjacent to the glass. Compared with the fireproof glass A encapsulated between 1, the sealing measures provided around the fireproof glass B can be simplified, or the sealing measures can be made unnecessary. Moreover, by making the sodium silicate layer 8 into a jelly shape in this way, it is possible to function as an adhesive layer for bonding the internal float glass 5 and the surface float glasses 6 and 7 (first float glass and second float glass). become. This makes it possible to reduce the cost of the fire glass B, and to make the fire glass B highly reliable so that sodium silicate does not leak out over a long period of time.

  In addition, the sodium silicate layer 8 is heated and foamed in the event of a fire, thereby exhibiting flame barrier properties, and the internal float glass 5 can be prevented from being damaged by the heat of the fire. Even when the internal float glass 5 is cracked by being heated, the sodium silicate layer 8 is adhered to the internal float glass 5 and the sodium silicate layer 8 is cracked by foaming to ensure the internal float glass 5. Can be prevented from falling off. Thereby, a flame and smoke can be reliably interrupted | blocked with the fire prevention glass B, and it can prevent that a fire expands to the non-fire side. Furthermore, since the sodium silicate layer 8 changes from transparent to opaque (white) due to a fire, it is possible to block the radiant heat at the time of fire and prevent the fire from spreading on the non-fire side.

  Further, since the surface float glasses 6 and 7 protect the sodium silicate layer 8 and maintain its moisture content, the surface float glasses 6 and 7 can be made extremely thin with a thickness H2 smaller than that of the internal float glass 5. For this reason, it becomes possible to make thickness H of fire prevention glass B small, and it becomes possible to reduce the restriction | limiting of a use place.

  Furthermore, it becomes possible to reduce the cost of the fire-proof glass B by combining the inexpensive float glasses 5, 6, and 7 and sodium silicate (silicate sodium layer 8).

  As mentioned above, although embodiment of the fire protection glass which concerns on this invention was described, this invention is not limited to said one Embodiment, In the range which does not deviate from the meaning, it can change suitably. For example, in this embodiment, the fireproof glass B is a pair of surface float glasses (a pair of second floats) spaced apart from each other on the one surface 5a side and the other surface 5b side of the internal float glass (first float glass) 5. Glass 6, 7) is laminated, and a sodium silicate layer 8 is interposed between the internal float glass 5 and each surface float glass 6, 7. When it is specified that the side becomes the fire side, the surface float glass 6 (7) is provided only on the fire side of the internal float glass 5, and between the surface float glass 6 (7) and the internal float glass 5 is provided. The fire glass B may be configured with the sodium silicate layer 8 interposed therebetween.

  Further, the fire glass B may be configured by using, for example, tempered glass as the internal float glass 5 or ground glass as the surface float glasses 6 and 7. Furthermore, in this embodiment, the internal float glass 5 having a thickness H1 of about 6 mm, the surface float glasses 6 and 7 having a thickness H2 of 2 mm or less, the thickness H3 of the sodium silicate layer 8 is set to about 1 mm, and the fireproof glass. However, the thicknesses H1, H2, and H3 of the internal float glass 5, the surface float glasses 6 and 7, and the sodium silicate layer 8 are not necessarily limited. In particular, the thickness H3 of the sodium silicate layer 8 may be appropriately determined within a range in which a desired flame barrier property can be exhibited. That is, the fireproof glass of the present invention can secure a flameproof time according to need by adjusting the thickness H3 of the sodium silicate layer 8, and can flexibly respond to safety level needs. Is possible.

It is a front view which shows the fire prevention glass which concerns on one Embodiment of this invention. It is the X1-X1 arrow view figure of FIG. It is a front view which shows the conventional fire prevention glass. FIG. 4 is a view taken along line X1-X1 in FIG. 3.

Explanation of symbols

4 Sealing member (sealing measures)
5 Internal float glass (first float glass)
5a One surface 5b The other surface 6 Surface float glass (second float glass)
7 Surface float glass (second float glass)
8 Sodium silicate layer A Conventional fire glass B Fire glass H Fire glass thickness H1 Internal float glass thickness H2 Surface float glass thickness H3 Sodium silicate layer thickness

Claims (1)

A first float glass, a second float glass formed with a thickness smaller than that of the first float glass, and laminated in parallel at an interval on at least one surface side of the first float glass; A jelly-like sodium silicate layer interposed between the float glass and the second float glass ,
A fireproof glass , wherein the second float glass is cracked when heated at a temperature at which the sodium silicate layer begins to foam .

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