JP2013209289A - Fireproof glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fireproof glass which has no problem in production and quality, enhances safety during the breakage of the glass, and does not deteriorate its fireproof performance.SOLUTION: The plate surface of a glass plate body 2 selected from the group consisting of heat resistant plate glass, wired plate glass, heat resistant reinforced plate glass and double glazed glass is coated in one with a polyester resin film 3 having heat resistance and transparency, wherein the polyester resin film 3 is exposed to at least one plate surface of the glass plate body 2.

Description

  The present invention relates to a fireproof glass composed of a glass plate body.

In general, two glass plates are used to improve the daily safety of glass by preventing the glass from falling or scattering if the glass breaks due to the collision of a human body or other objects. A laminated glass is used in which a resin film (hereinafter abbreviated as a PVB film) made of PVB (polyvinyl butyral) resin is put between the main bodies and pressure bonded.
However, the ignition point of the PVB film sandwiched between the laminated glasses is around 260 ° C., and according to the fire prevention test used as a substitute characteristic test for fire, the glass plate main body plate is heated around 10 minutes. Since the surface temperature exceeds 300 ° C, the PVB film ignites and the fireproof performance is impaired, this kind of laminated glass has a problem as fireproof glass, although it is highly safe in everyday life, There is a demand for a fire-resistant glass that has not only high performance but also high fire-proof performance.
In recent years, as a response to that demand, a laminated glass having a fire resistance performance improved by employing a THV film made of a THV (tetrafluoroethylene hexafluoropropylene vinylidene fluoride) resin as an intermediate resin film has been proposed.

However, in the case of a laminated glass sandwiching a THV film, there are problems in cost and manufacturing method.
That is, since the THV film uses a fluororesin as a base material, the cost is high, and there is a problem in toxicity when the film is gasified and decomposed. And in order to adhere | attach a glass plate main body and a glass plate main body through this THV film, a special manufacturing installation is required and a conventional installation cannot be used.

  The present invention has been made in view of the above circumstances, and is to provide a fire-proof glass that has no problem in manufacturing and quality, improves safety at the time of breakage of the glass, and does not impair fire-proof performance.

  As shown in FIGS. 1 and 2, the characteristic configuration of the fireproof glass according to the first aspect of the invention is a plate of a glass plate body selected from the group consisting of heat-resistant plate glass, meshed plate glass, heat-resistant tempered plate glass, and multi-layer glass. The surface is integrally covered with a polyester resin film having heat resistance and transparency, and the polyester resin film is exposed to at least one plate surface of the glass plate body.

[Effect] The polyester resin itself burns, but the calorie burn is 500 kcal / kg, which is lower than other resins, and among the similar thermoplastic resins, it has excellent heat resistance, and the resin-based material Among them, it is a material that is difficult to burn, and can improve the fireproof performance of the glass plate body.

  Also, in order to prevent the shattering of glass when it breaks, it has superior tear strength compared to other resins, so it has high glass shatter prevention performance even with a very thin film thickness. Daily safety can be achieved.

  Furthermore, polyester resin is inexpensive and easy to process. Even when the plate surface of the glass plate main body is integrally coated, there is no problem with transparency, and there is almost no haze or distortion.

  In the present invention, the polyester resin means a resin based on polyethylene terephthalate, and means a polyester-based thermoplastic resin, a polyester-based thermoplastic elastomer, a polyester fiber, or the like.

  Since the above-mentioned polyester resin film having heat resistance is coated on the plate surface of the glass plate main body, the fire-proof performance of the glass plate main body can be improved, and it is coated so as to be integrated with the plate surface. Therefore, even if the glass is broken due to the collision of a human body or other objects, it is easy to prevent the glass from falling or scattering, and the daily safety of the glass can be improved. In addition, since the polyester resin film has transparency, for example, when the glass plate body is transparent, it can be made fireproof glass that does not impair the transparency.

  Since the polyester resin film only needs to be integrally coated on the plate surface of the glass plate body, the cost is less than half that of the laminated glass type described above, and special manufacturing equipment is also required. Therefore, it can be manufactured inexpensively and simply.

  Therefore, the fire-proof glass according to the present invention has safety that is difficult to drop and scatter of the glass by an inexpensive glass plate as a whole, and can improve the fire-proof performance, so that even if a fire breaks out It can be used as a difficult window glass and door, and is useful in terms of safety and disaster prevention.

  In the case of a sheet glass with a mesh, even if it breaks in the event of a fire, fragments are retained by a metal mesh inserted in the middle, preventing the intrusion of a flame. In addition, it is possible to maintain the independence and exhibit the fireproof property, and in any case, the fireproof performance can be further improved.

  As will be described later, reference numerals are used for convenience of comparison with the drawings. However, the present invention is not limited to the configurations of the accompanying drawings.

The longitudinal cross-sectional view which shows the installation condition of the fire prevention glass which concerns on this invention The longitudinal cross-sectional view which shows the installation condition of the fire prevention glass which concerns on this invention

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, a fire glass 1 according to the present invention has a polyester resin film 3 integrally coated on one plate surface of a single glass plate body 2. And the fire glass 1 is fitted and fixed to the sash frame 4 built in the structure.

  In the present embodiment, the glass plate body 2 is made of a transparent heat-resistant glass plate having a thickness (t) of about 8 mm.

  The polyester resin film 3 adheres a sheet-like polyester resin film having a thickness of 20 to 200 μm to the plate surface of the glass plate body 2 via an acrylic adhesive layer (not shown) having a thickness of 5 to 20 μm. It is covered and formed.

Since the polyester resin film is coated and adhered to the plate surface of the glass plate with an acrylic adhesive that is compatible with glass and the polyester resin film, it can improve fire prevention performance and daily safety. Moreover, the workability at the time of coating the polyester resin film on the glass plate main body plate surface is also good.

Even if the thickness of the polyester resin film is thin, the fireproof performance is not significantly impaired, but it is difficult to obtain sufficient glass holding performance when the glass is broken. Therefore, the thickness is preferably 20 μm or more in order to have sufficient performance for safety of glass.
If the polyester resin film is too thick, the polyester resin is gasified in the event of a fire, as will be described later in the examples. However, the time for gasification becomes longer, and the polyester resin is carbonized. Before, since the temperature of the glass surface becomes high, the polyester resin may ignite and there is a possibility that the fireproof performance may be impaired, so the thickness is preferably 200 μm or less.

  The thickness of the adhesive layer is preferably as thin as possible and is preferably 20 μm or less. However, from the viewpoint of ensuring safety to prevent scattering of glass pieces, the polyester resin film is pulled from the surface of the glass plate body. In order to maintain the peel strength (adhesive strength), it is preferable that the thickness is at least 5 μm. In addition, since some acrylic adhesives generate toxic cyan gas when decomposed by heat, it is not preferable to use acrylic adhesives that emit such toxic gas. Even so, it is preferable to reduce the amount of acrylic adhesive used as much as possible.

  And when coating the polyester resin film 3 on the plate surface of the glass plate body 2, an adhesive layer is formed on the plate surface of the glass plate body 2 after washing wet with water, and water is sprayed on the surface of the adhesive layer. The sheet-like polyester resin film 3 can be pasted, and moisture between the polyester resin film 3 and the glass plate body 2 can be pushed out and dried.

  In addition, when the dimension of the glass plate main body 2 is uniform, the method of crimping | bonding the polyester resin film 3 directly to the plate surface of the glass plate main body 2 by a mechanical roll press can also be employ | adopted.

  In addition, it is best to cover the glass plate body 2 with the polyester resin film 3 up to the edge of the glass plate body 2 (see the upper side of the fireproof glass shown in FIG. 1). When the glass plate body 2 is preliminarily applied to the sash frame 4, it is necessary to attach the polyester resin film 3 to the glass plate body 2 later, but the polyester resin film 3 at that time and a glass periphery sealing described later The distance from the material 8 is preferably 5 mm or less (see the lower side of the fireproof glass shown in FIG. 1). The reason why the thickness is 5 mm or less is that the holding performance of the fireproof glass 1 is high even when the glass is broken, and the safety can be improved by preventing falling and scattering. If the distance exceeds 5 mm, the cracks that have entered the peripheral edge of the glass plate body 2 are likely to propagate to the central portion of the glass plate body, and when a secondary external force such as wind load is applied, the glass drops. This is not preferable because it increases the risk.

The sash frame 4 is a metal frame having a recess, and the fire glass 1 is sandwiched by the holding material 5 (7, 8) and fixed in the recess 10 as follows. .
That is, as shown in FIG. 1, a setting block 6 made of chloroprene rubber having a function of protecting the edge of the glass plate body 2 is installed in the recess 10 of the sash frame 4 into which the lower side of the fire glass 1 is fitted, The periphery of the glass plate body 2 is fitted into the recess 10 of the sash frame 4, and a nonflammable backup material (for example, an alumina silicate ceramic rope or the like) is used as the holding material 5 between the glass plate body 2 and the sash frame 4. Ceramic sheet) 7 is filled all around without any gaps, and fireproof sealant (for example, Toray Dow Corning Silicone Silicone Sealant SE5007) 8 is used as holding material 5 for both water stopping and finishing. The edge portion of the glass plate body 2 is sandwiched and fixed, and is fitted into the sash frame 4 and fixed.

  Thereby, the hot air coming from the gap between the fireproof glass 1 and the sash frame 4 can be completely blocked, and more stable fireproof performance can be obtained. It is possible to prevent the peripheral edge of the glass from coming off due to thermal deformation.

  Incidentally, in this embodiment, the said glass plate main body 2 is arrange | positioned so that the allowance dimension of the edge part to the said holding material may be set to 1 cm.

[Another embodiment]
Other embodiments will be described below.
<1> The attachment of the glass plate main body 2 and the sash frame 4 is not limited to the previous embodiment. For example, as shown in FIG. If a metal elastic holding material (for example, a stainless steel metal having a thickness of 0.5 mm) 9 that is in surface contact with the sash frame 4 is used for fixing, the radiant heat to the sash frame 4 is transferred from the elastic holding member 9 to glass. It can be efficiently transmitted to the peripheral part of the plate body 2, can reduce the temperature difference between the central part and the peripheral part of the glass plate body 2, can hardly be broken, and is difficult to melt because it is made of metal. Therefore, the peripheral edge portion of the glass can be firmly held, and the detachment can be prevented more reliably.

  <2> The glass plate body 2 is not limited to the heat-resistant plate glass described in the previous embodiment, and may be, for example, a meshed plate glass or a heat-resistant tempered plate glass. In the case of a sheet glass with a mesh, even if it breaks in the event of a fire, fragments are held by a metal net inserted in the middle, preventing the intrusion of the flame. In addition, it is possible to maintain the independence and exhibit the fireproof property, and in any case, the fireproof performance can be further improved.

  In addition, the fire prevention glass is not limited to the single glass plate main body shown in the previous embodiment, but may be a multi-layer glass composed of a plurality of glass plate main bodies.

  The polyester resin film 3 is not limited to one plate surface of the glass plate main body 2 as described in the previous embodiment, and may be coated on both plate surfaces.

  <3> As described in the previous embodiment, the resin film made of polyester resin is not limited to a sheet-like polyester resin film bonded to the plate surface of the glass plate main body via the adhesive layer. In addition, a polyester-based resin may be applied (coated) directly to the glass plate body. In this case, work efficiency can be improved and the adhesion between the glass plate body and the resin film is also better. It becomes.

O Fireproof test The fireproof test of the fireproof glass was conducted by the method described in the Ministry of Construction Notification No. 1125 in 1990.
In the experiment, fireproof glass in which a polyester resin film (thickness: 100 μm) was coated on one side of a heat-resistant tempered glass plate (thickness: 8 mm) measuring 1830 mm × 930 mm was used.

  First, a test was conducted on a fire-resistant glass plate in which a polyester resin film was coated on the glass plate surface opposite to the fire room (that is, the glass plate surface that is not directly exposed to fire heat). Then, due to the heat that the polyester resin film conducted through the glass, smoke gradually emitted from the central portion of the glass plate having a high temperature, and the smoke gradually spread to the entire surface of the glass plate. The polyester resin film is thermally decomposed and gasified for about 5 minutes. However, the polyester resin film does not ignite, gradually the carbonized polyester resin film, and only the carbon black film remains on the glass surface. It was. As the heating became closer to 20 minutes, the black film of carbon also changed to carbon dioxide, and the glass plate surface changed to a transparent state. During this time, no ignition occurred in the polyester resin film.

  Next, in the same fireproof test, a fireproof glass plate coated with a polyester resin film on the fire room side (the surface of the glass plate that is directly exposed to fire heat) was tested. Simultaneously with the gasification of the film, the polyester resin film burned out. However, since this combustion occurred only on the glass plate surface on the fire room side, there was no problem on the non-fire room side opposite to the fire room.

  From the fire test as described above, the fire glass according to the present invention was found to pass the 1990 Ministry of Construction Notification No. 1125 Type B fire test.

O Destructive test The fireproof glass was subjected to a destructive test to evaluate the scattering prevention performance when the fireproof glass was broken.
In the experiment, fireproof glass in which a polyester resin film (thickness 50 μm) was coated on one side of a 1930 mm × 864 mm netted glass plate (thickness 6.8 mm) was used.

  The fireproof glass is fixed to the test frame, and a 45 kg impactor with a leather bag filled with lead balls is hung with a wire. Vertical height 75 cm When the so-called shotback test was performed to allow the pendulum to fall freely (fired from the plate surface not covered with the polyester resin film), fire was applied to the glass center. The glass has fine fissures, and the shape of the fissure has become a spider web, but the surface of the polyester resin film is stable and there is no scattering of glass fragments, and there is no breakage of the fireproof glass. there were.

  In addition, as a comparative example, the same test as the above test was performed on a fireproof glass coated with a polyethylene resin film instead of a polyester resin film, but in the fireproof test, a tendency to ignite more easily than a polyester resin film was recognized. In the destructive test, the tear strength of the polyethylene resin film was as low as about half that of the polyester resin film, and thus a tendency for glass pieces to scatter easily was observed, and both fireproof performance and safety were rejected. In addition, various other resins were examined, but the resin containing chlorine failed in the fire test because it generates harmful chlorine gas in the fire test.

1 Fireproof glass 2 Glass plate body 3 Polyester resin film

Claims (1)

  A polyester resin film having heat resistance and transparency is integrally coated on a plate surface of a glass plate body selected from the group consisting of heat-resistant plate glass, mesh-containing plate glass, heat-resistant tempered plate glass, and multi-layer glass, and the polyester resin film Is exposed to at least one plate surface of the glass plate body.

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