JP5252202B2 - Fire protection film and fire protection glass - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a fire prevention film to be attached to the surface of a fire prevention object such as glass in order to impart fire prevention performance, and a fire prevention glass constituted by attaching a fire prevention film.

Conventionally, in order to prevent the building from being burned in a fire and to ensure safety of evacuation, it is necessary to improve the fire prevention performance of the opening of the building and prevent the penetration of flame and smoke through the opening. However, the float glass often used for glass windows, glass doors, glass walls, etc. in buildings has a drawback in that it cannot be prevented from penetrating flames and smoke when it is heated at a high temperature during a fire.
Therefore, a mesh-like glass in which a mesh-like wire is embedded in glass and the glass is held by the wire so that it does not fall off even if cracks occur in the glass, or a heat-resistant tempered glass formed only from pure anhydrous silicic acid Are used for glass windows, glass doors, and glass walls in buildings. Moreover, the method of sticking a scattering prevention film etc. to glass so that it may not be scattered when glass breaks is also performed.

However, although meshed glass and fireproof tempered glass do not fall off in the event of a fire, there is a risk that radiant heat permeates through the glass and is transmitted from the fire side to the non-fire side, resulting in the spread of fire. And in the glass with mesh, the wire embedded in the glass deteriorates the appearance of the glass at the normal time. Moreover, the anti-scattering film prevents scattering when the glass is broken, and has low heat resistance and cannot cope with flame shielding.
Then, the fire prevention glass comprised by arrange | positioning transparent foaming heat insulating materials, such as sodium silicate, between multilayer glass is proposed (for example, refer patent document 1, patent document 2, patent document 3). In this fireproof glass, when heated at a high temperature in the event of a fire, the foaming insulation foams and exhibits flameproofing properties, so it is possible to prevent the non-fire side glass from cracking in particular and to suppress the spread of fire Is possible. In addition, the transparent foaming insulation foams and changes to opaque to prevent the radiant heat from propagating from the fire side to the non-fire side. It becomes possible to prevent expansion.
JP-A-57-183338 JP 58-451141 A Japanese Patent Laid-Open No. 3-40944

However, the conventional fireproof glass has the following problems.
In order to impart fire resistance to existing building float glass, all existing float glass had to be replaced with glass having high fire resistance. Highly fire-resistant meshed glass, fire-resistant tempered glass, and fire-resistant glass according to Patent Documents 1, 2, and 3 are very expensive compared to float glass and have a large economic burden. There is a problem that it takes labor to dispose of the float glass.
Moreover, in the fire prevention glass by patent document 1, patent document 2, and patent document 3, since it is comprised including several glass and the foaming heat insulating material provided between adjacent glass, the thickness is For example, it has become as large as 20 and a few millimeters, and it may be difficult to install in place of a single-layer float glass of several millimeters installed in an existing building.

  The present invention has been made in view of the above-described circumstances, and is configured by easily and economically attaching a fireproof film that can impart fireproof performance to a fireproof object such as float glass and the fireproof film. The purpose is to provide a fire-proof glass.

In order to achieve the above object, a fireproof film according to the present invention is a fireproof film that is attached to the surface of a fireproof object and imparts fireproof performance to the fireproof object, and includes a foamable heat insulating material and a resilience imparting material. A foamable heat-insulating layer containing is laminated on a resin film.
In the present invention, since the fireproof film has a structure in which a foamable heat insulating layer including a foamable heat insulating material and a resilience imparting material is laminated on a resin film, fireproof performance can be easily achieved by attaching a fireproof film to a fireproof object. Can be granted. Moreover, since the foamable heat insulating layer contains a resilience imparting material and the fireproof film has resilience, it is easy to carry out affixing and transporting to a fireproof object.

In the fireproof film according to the present invention, the foamable heat insulating material is sodium silicate, and the elasticity imparting material is potassium hydroxide, sodium hydroxide, a metal salt, or a mixture thereof . Further, the molar ratio of the foaming heat insulating material and the elasticity imparting material is 2.0 to 3.0.
In the present invention, inexpensive sodium silicate is used as the foamable heat insulating material, and potassium hydroxide, sodium hydroxide, metal salt, or a mixture thereof is used as the elasticity imparting material. It is possible to form a fireproof film having Moreover, since neither is an organic compound, fire resistance is high.

Moreover, it is preferable that the resin-based film is subjected to easy adhesion treatment on the adhesive surface with the foamable heat insulating layer.
In the present invention, since the resin film is subjected to an easy adhesion treatment on the adhesive surface with the foam heat insulating layer, the resin film and the foam heat insulating layer can be easily and reliably bonded. Easy to control the quality of fire prevention film.

Moreover, in the fire-proof glass which concerns on this invention, the fire-resistant film in which the foamable heat insulation layer containing a foamable heat insulating material and an elasticity imparting material is laminated | stacked on the resin-type film is affixed on the surface of glass, and is comprised. It is characterized by that.
In this invention, the fire prevention glass excellent in fire prevention performance can be formed by sticking a fire prevention film on the surface of glass. In addition, since the foamable heat insulating layer contains a resilience imparting material, the fireproof film has elasticity, and it is easy to attach the fireproof film to the glass surface, and the quality of the fireproof glass is stabilized.

  According to the present invention, the fireproof film has a foamable heat insulating layer including a foamable heat insulating material and a resilience imparting material laminated on the resin-based film. A fireproof film that can impart fireproof performance to an object can be realized.

Hereinafter, the fireproof film and fireproof glass by embodiment of this invention are demonstrated based on FIG. 1 and FIG.
FIG. 1 is a diagram showing an example of a fire prevention film according to an embodiment of the present invention, and FIG. 2 is a diagram showing an example of a fire prevention glass according to an embodiment of the present invention.

  As shown in FIG. 1, the fireproof film 1 according to the present embodiment is formed by integrally laminating a foamable heat insulating layer 3 having a predetermined moisture content on one surface of a resinous film 2, thereby forming the resinous film 2 of the foamable heat insulating layer 3. The release paper 4 is provided on the surface 3a on the side not in contact with. And as shown in FIG. 2, as for the fire protection glass 10 by this Embodiment, the surface 3a by the side of the foaming heat insulation layer 3 of the fire protection film 1 from which the release paper 4 was peeled off is both surfaces G1, G2 of the float glass G. This is a pasted configuration.

The resin film 2 is a transparent or colored film sheet, and is formed of, for example, polyester. In addition, the thickness of the resin film 2 is preferably about 0.075 mm and less than 0.1 mm so that the workability at the time of attaching to the float glass G is not deteriorated. The resin film 2 protects the foamable heat insulating layer 3 at normal times, and also plays a role of water retention of the foamable heat insulating layer 3. In the event of a fire, it melts at about 100-150 ° C.
The resin film 2 is subjected to easy adhesion treatment such as corona discharge treatment on the surface thereof so as to be in close contact with the foamable heat insulating layer 3.

The foamable heat insulating layer 3 includes a foamable heat insulating material and an elasticity imparting material. In this embodiment, the foamable heat insulating material is sodium silicate (sodium silicate), and the elasticity imparting material is potassium hydroxide and metal. Use salt borax. The foamable heat insulating layer 3 is a transparent sodium silicate layer based on powdered sodium silicate, potassium hydroxide, borax and water. The foamable heat insulating layer 3 has a thickness of about 1 mm, and this thickness can be adjusted according to the required fireproof performance. The moisture content of the foamable heat insulating layer 3 is preferably about 40% to 70%, for example, about 50% to 60%.
When heated at a temperature of around 100 ° C., sodium silicate foams and exhibits heat insulation properties, and foams and the transparent sodium silicate changes to opaque, increasing the thickness. Potassium hydroxide and borax provide elasticity to the sodium silicate layer.
Further, as the elasticity imparting material, potassium hydroxide, sodium hydroxide, metal salt such as borax, or a mixture thereof can be employed.

Further, in the preparation of sodium silicate, potassium hydroxide and borax contained in the foamable heat insulating layer 3, the molar ratio A of the preparation is set from the following formula (1).
A = {SiO ₂ / [SiO ₂ ]} / {Na ₂ O / [Na ₂ O] + X / [X] + Y / [Y]} (1)
Here, sodium silicate is set separately for SiO ₂ (silicon dioxide) and Na ₂ O (sodium oxide), X is potassium hydroxide, Y is borax, and SiO ₂ , Na ₂ O, X, and Y are respectively Weight (g) or weight ratio (%) is shown, and [SiO ₂ ], [Na ₂ O], [X], and [Y] represent respective formula weights. The molar ratio A is set to be about 2.0 to 3.0 around 2.2 to 2.3.

  The release paper 4 is a film sheet formed of, for example, polyester or polyolefin, and the thickness is preferably 0.1 mm or less of about 0.045 mm to 0.075 mm. The release paper 4 protects the foamable heat insulating layer 3 of the fireproof film 1 before use, and also plays the role of water retention of the foamable heat insulating layer 3.

The method for imparting fireproof performance to the fireproof object by the fireproof film 1 according to the present embodiment configured as described above is performed by removing the release paper 4 of the fireproof film 1 and attaching it to the fireproof object. For example, as shown in FIG. 2, the fire-resistant glass 10 is formed in which the fire-resistant film 1 is attached to both surfaces G <b> 1 and G <b> 2 of the float glass G to impart fire-proof performance.
At this time, the fire prevention film 1 is water-applied to the float glass G sprayed on the surfaces G1 and G2. The foamable heat insulating layer 3 serves as an adhesive for bonding the fireproof film 1 to the float glass G.
The float glass G is an existing float glass such as a glass window, a glass door, or a glass wall of an existing building.
In addition, in the fire prevention glass 10, although the fire prevention film 1 is each affixed on both surfaces G1 and G2 of the float glass G, you may affix on either one side.

Next, the effect of the fireproof film and fireproof glass mentioned above is demonstrated using drawing.
The fireproof film 1 can impart fireproof performance to the float glass G by simply peeling off the release paper 4 and applying the water to the float glass G, and the foamable heat insulating layer 3 is made of potassium hydroxide as a resilience imparting material. In addition, since borax is contained, there is an effect that it has elasticity and is easy to construct and transport. Moreover, compared with the conventional method of exchanging the existing float glass G with a netted glass, a heat-resistant tempered glass, etc., the fireproof formed with inexpensive sodium silicate or the resin film 2 without replacing the existing float glass G Since the fire performance can be imparted by attaching the film 1 to the existing float glass G, the cost and labor can be reduced.

  In the event of a fire, when the fire side fire prevention film 1 is heated before the float glass G and reaches a temperature of around 100 ° C., the resin film 2 is melted, and the foamable heat insulating layer 3 is foamed and its thickness is increased. Increases the thickness and begins to exert flame barrier and adhesive properties. Thus, since the foamable heat insulating layer 3 starts to foam at around 100 ° C. and the resin film 2 melts, the resin film 2 does not interfere with foaming of the foam heat insulating layer 3 and is surely foamed. The heat-insulating layer 3 is foamed and can exhibit flame barrier properties and adhesion.

Moreover, even when heated at a high temperature close to 800 ° C. from the fire side, the heat is blocked by the foamed heat-insulating layer 3, and breakage of the float glass G is suppressed. On the other hand, when the glass is continuously heated at a high temperature close to 800 ° C. for a long time, the float glass G may be cracked, but the foamable heat insulating layer 3 adheres to the surfaces G1 and G2 of the float glass G. In addition, the foamable heat insulating layer 3 is cracked by the foaming, so that the float glass G is reliably prevented from falling off. At this time, the foamable heat insulating layer 3 changes from transparent to opaque together with foaming, so that the radiant heat is blocked and the spread of fire on the non-fire side is also prevented. In this way, the flame, smoke, and radiant heat are reliably blocked, and the expansion of the fire to the non-fire side can be suppressed.
Moreover, since the fireproof film 1 is a structure which does not contain organic substance, fireproof performance can be improved.

Moreover, at the normal time, the foamable heat insulating layer 3 is protected from an external impact by the resin film 2 disposed on the outer surface side, and is held in a suitable water retaining state. Thereby, the foaming heat insulation layer 3 is reliably maintained over a long period of time so that the foamable heat insulation layer 3 is not deteriorated by the resin film 2.
Furthermore, since the fireproof film 1 is transparent, a mesh-like wire embedded in the glass can be seen like a conventional glass with a mesh, and the open feeling of the space required for the glass window, glass door, glass wall, etc. of the building It is possible to suitably impart fireproof performance to the float glass G without impairing the continuity between the spaces. In addition, the fire-resistant film 1 is attached so as to cover the surfaces G1 and G2 of the float glass G, so that the float glass G can be used not only in the case of a fire but also when the float glass G is broken such as in the event of an earthquake. The scattering of the glass G can be prevented.

Here, a fireproof glass 20 having a width of 1.2 m and a height of 3.0 m as shown in FIG. 3 was formed, and a standard heating test by ISO834 was performed on the fireproof glass 20.
The fire prevention glass 20 has a structure similar to that of the fire prevention glass 10 shown in FIG. 2, and has a structure in which the fire prevention film 1 having a thickness of the foamable heat insulating layer 3 of 1 mm is attached to both surfaces of the float glass G having a thickness of 6 mm. . And the temperature was measured with progress of time in the temperature measurement points P1-P10 of the fire prevention film 1 surface of the fire prevention glass 20 on the non-fire side.
FIG. 4A shows a change in the furnace temperature during heating, and FIG. 4B shows a temperature change at each temperature measurement point. FIG. 4 shows the temperature change at a total of 16 measurement points, four at four different heights in the furnace.
Further, it was confirmed by visual observation that no smoke was ejected to the non-fire side of the fire glass 10 and that the fire glass was prevented from falling off.

  As shown in FIG.4 (b), the temperature of the temperature measurement points P1-P10 is about 100 degreeC until 20 minutes after a heating, and also from this, the jet of fire smoke to the non-fire side of the fire prevention glass 10 It can be seen that there is no danger, and the risk of fire spread is extremely small. That is, it can be seen that when the thickness of the foamable heat insulating layer 3 is 1 mm, it is possible to prevent the ejection of fire smoke and the fire glass 10 from dropping for at least 20 minutes.

As mentioned above, although embodiment of the fireproof film and fireproof glass by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the embodiment described above , the elasticity-imparting material is potassium hydroxide and borax, but sodium hydroxide or a metal salt other than borax may be used instead of potassium hydroxide or borax. Or these arbitrary 1 type or the mixture containing arbitrary 2 or more types may be sufficient.
Moreover, in said embodiment, although the fire prevention film 1 is affixed on the float glass G of the existing building, you may affix the fire prevention film 1 to the newly established float glass G, and other than the float glass G You may affix the fire prevention film 1 to a fire prevention object. Moreover, you may attach the fire prevention glass 10 previously formed in the factory etc. to the existing or new building. Further, the fireproof film 1 is not necessarily provided with the release paper 4.
In short, it is only necessary to obtain the desired function in the present invention.

It is a figure which shows an example of the fire prevention film by embodiment of this invention. It is a figure which shows an example of the fire prevention glass by embodiment of this invention. It is a figure which shows the fire prevention glass and temperature measurement point which performed the standard heating test. (A) is a figure which shows the temperature in a furnace at the time of a standard heating test, (b) is a figure which shows the temperature change of the temperature measurement point shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fire prevention film 2 Resin-type film 3 Foaming heat insulation layer 4 Release paper 10, 20 Fire prevention glass G Float glass G1, G2 Surface

Claims (4)

A fire prevention film for attaching to the surface of a fire prevention object and imparting fire prevention performance to the fire prevention object,
A foamable heat insulating layer containing a foamable heat insulating material and a resilience imparting material is laminated on the resin film ,
The foamable heat insulating material is sodium silicate, and the elasticity imparting material is potassium hydroxide, sodium hydroxide, metal salt, or a mixture thereof.
A fireproof film , wherein a molar ratio of the foamable heat insulating material and the elasticity imparting material is 2.0 to 3.0 . The fireproof film according to claim 1 , wherein the resin film is subjected to an easy adhesion treatment on an adhesive surface with the foamable heat insulating layer.   A fireproof glass comprising a fireproof film in which a foamable heat insulating layer including a foamable heat insulating material and a resilience imparting material is laminated on a resin film, and is attached to the surface of the glass.   The foamable heat insulating material in the fireproof film is sodium silicate, and the elasticity imparting material is potassium hydroxide, sodium hydroxide, a metal salt, or a mixture thereof, and the foamable heat insulating material and the elasticity The fireproof glass according to claim 3, wherein the molar ratio of the imparting material is 2.0 to 3.0.

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