JP2575951B2 - Fire safety glass - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire safety glass functioning as a fire door in a fire and as a safety glass in normal times.

[0002]

2. Description of the Related Art In recent years, as the number of large buildings such as buildings, department stores, and supermarkets has increased, the function of a fire door that shuts off flames and smoke during a fire and minimizes the spread of fire has been reported. There is a demand for a fire-resistant safety glass having both functions of a safety glass that does not scatter and does not generate through holes.

[0003] Conventionally, netted glass and heat-resistant transparent crystallized glass have been used as fire doors, and laminated glass and glass with a shatterproof film have been used as safety glass, both of which have both functions. Glass has not yet been developed.

[0004]

That is, the safety glass has no flameproofing and smokeproofness at all because it breaks at the time of a fire to form a through-hole and the intermediate layer or the film burns.
In addition, if the glass with a fire door is broken in normal times, it can prevent the glass from scattering and falling to some extent, but it breaks down due to heat in a fire and melts down. Almost no. The heat-resistant transparent crystallized glass, which is also a fire door, does not break or melt down due to a fire, and functions as a good fire door, but when broken, broken pieces scatter like normal glass, It does not have a function as a safety glass.

[0005] Under these circumstances, in recent years, a glass having a thermal expansion coefficient of about 30 × 10 ^-7 / ° C. and having been subjected to a thermal stress around a borosilicate glass plate which is relatively resistant to thermal shock and strengthened has been developed. However, since this glass also has a low softening temperature, for example, the glass is 1 according to Ministry of Construction Notification No. 1125.
If heating is performed for a long time, softening deformation occurs, and it cannot withstand a long-term fire. Further, a special frame structure is required to prevent the glass from falling off due to softening deformation, and it has a drawback that it lacks versatility.

It is an object of the present invention to function as a fire protection glass that shuts out flames and smoke for a long time in the event of a fire. The object of the present invention is to provide a dual-function fire safety glass functioning as a safety glass that does not occur.

[0007]

Fire Safety Glass SUMMARY OF THE INVENTION The present invention, on a plurality of transparent glass plates, a fluororesin film comprising only a chain-like molecular structure is glued, the transparent
At least one of the bright glass plates is -10 to 10 × 10 ^-7
/ C is a heat-resistant transparent crystallized glass plate with a coefficient of thermal expansion of
Yes, the thickness of the fluororesin film is 0.02 to 1 m
m .

[0008]

[0009]

The heat-resistant transparent crystallized glass used in the present invention is a glass having a small coefficient of thermal expansion of -10 to 10 × 10 ^-7 / ° C. Because of its high heat resistance temperature, it has fireproof properties that can withstand fire tests of Ministry of Construction No. 1125 for more than 3 hours.

The fluororesin film of the present invention comprising only a chain-like molecular structure is flame-retardant due to the strong interatomic bond between carbon and fluorine and the barrier effect of the fluorine atoms surrounding the carbon skeleton. It has the property of not burning in air. In addition, this fluororesin film has a high degree of polymerization and has a complicatedly entangled structure compared to fluoropolymer films of other molecular structures, so it has high elongation and tensile strength. A material having excellent properties, having excellent penetration resistance and anti-scattering properties can be obtained. The thickness of this fluororesin film is
It needs to be 0.02 to 1 mm. In other words, fluororesin
Excellent when the film thickness is 0.02mm or less
It is difficult to obtain impact resistance, while 1 mm or more
In this case, the transparency is impaired and the
Smoke is easily generated when the rum melts, so it is good for fire prevention
Not good. Examples of the material include fluorinated ethylene propylene (FEP), tetrafluoroethylene-perfluoroalkoxyethylene copolymer (PF)
A), polychlorotrifluoroethylene (PCTF
E), ethylene tetrafluoride / ethylene copolymer (ETF)
E), polyvinylidene fluoride (PVDF) and the like are preferred.

In the present invention, a heat-resistant transparent crystallized glass is used.
In order to adhere a fluororesin film consisting of only a chain-like molecular structure to a plate , either a method of thermocompression bonding or an adhesion method using an adhesive is adopted. Since the fire-resistant safety glass of the present invention bonded by thermocompression bonding does not contain combustibles, there is almost no smoke and there is no problem in fire prevention. When an adhesive is used, even if a flammable adhesive is used, oxygen is prevented from being supplied to the adhesive because the fluororesin film covers the adhesive layer, and ignition does not occur. Even if the heating is continued and the fluororesin film is melted, the melted fluororesin film wraps around the adhesive and becomes incombustible, so that there is no problem in fire prevention.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments.

[0013]

[0014]

[0015]

[0016](Example 1) It has a size of 2000 × 900 × 5mm and has a coefficient of thermal expansion
-5 x 10 ^-7 / ° C EnduranceThermally transparent crystallized glass plate (Phi
Alite: Nippon Electric Glass Co., Ltd.)Prepare 10, 10
And a FEP film 12 having a thickness of 125 μm between them.
12 kg / cm while heating to 280 ° C.
^TwoBy applying pressure and crimpingFIG.As shown
Specimens were prepared.

[0017](Example 2)  The same heat-resistant transparent crystallized glass plate 10 as in Example 1 and 2
Prepare soda glass plate 13 of 000 × 900 × 3mm
And a PFA film 11 having a thickness of 150 μm
12 kg / cm while heating to 330 ° C.^Two
By applying pressure and crimpingFIG.As shown in
A test body was prepared.

[0018](Example 3)  The same heat-resistant transparent crystallized glass plate 10 as in Example 1 and 2
000 × 900 × 6.5 mm soda glass plate 13, 1
3 and a 200 μm thick FEP filter
1 while heating to 280 ° C
2kg / cm^TwoBy applying pressure and crimpingFigure
3Specimens as shown in were prepared.

(Comparative Example 1) Soda glass plates 13 and 13 of 2000 × 900 × 5 mm
Are prepared, and a 1-mm-thick polyvinyl butyral (PVB) film 14 is interposed therebetween, and a pressure of 12 kg / cm ² is applied thereto while heating to 170 ° C., and the sample is pressed as shown in FIG. Was prepared.

Comparative Example 2 The same heat-resistant transparent crystallized glass plates 10 and 2 as in Example 1 were used.
Prepare 000 × 900 × 3 mm soda glass plate 13, FIG. 5 by by interposing a PVB film 14 having a thickness of 1mm between them, crimped by applying pressure of 12 kg / cm ² while heating to 170 ° C. Specimens as shown in were prepared.

The impact resistance, thermal cracking, softening deformation, ignition, smoke generation, and fire protection time of each of the test specimens thus prepared were examined. The results are shown in Table 1.

[0022]

[Table 1]

As is clear from Table 1, the test specimens of the examples of the present invention have high impact resistance, do not cause heat cracking, softening deformation, ignition, and smoking, and have a fire protection time of 180.
It was longer than a minute.

On the other hand, the test piece of Comparative Example 1 showed a good value of the impact resistance, but at 500.degree.
Further, at 650 ° C., softening deformation and falling off occurred, and through holes were formed, so that the fire prevention time was only 8 minutes. Further, in the test body of Comparative Example 2, since the soda glass plate 13 caused thermal cracking at 550 ° C. and fell off, and further ignited PVB,
Fire protection time was only 6 minutes.

As shown in FIG. 6 , the impact resistance was determined after fixing each test piece S to a predetermined position of the iron frame 15 and setting the distance from the fulcrum 15a to the center of gravity of the weight 16 to be 1524 mm. , The weight 16 is gradually dropped from the vertical position to the height H.
When the impact is applied to the specimen S while increasing the size, the maximum drop when the impact of the impact on the specimen S does not occur and the total weight of the falling glass plate becomes 50 g or less is obtained. The height H was determined. The higher the drop height, the higher the impact resistance.

The heat cracking temperature, softening deformation temperature, ignition, and smoke generation were determined by using a gas heating furnace as a test piece, and
It was observed by heating based on the standard heating curve of No. 25.Furthermore, the fire prevention time is defined as the time until a flame is generated on the opposite side of the test specimen on the heating side or a through hole is generated in the test specimen. It is shown.

[0027]

As described above, the fire safety glass of the present invention functions as a fire prevention glass for shutting off flames and smoke for a long time in the event of a fire.
Even if it is broken, no fragments are scattered and no through holes are formed.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a test sample of Example 1.

FIG. 2 is a schematic cross-sectional view of a test piece according to a second embodiment.

FIG. 3 is a schematic sectional view of a test piece according to a third embodiment.

FIG. 4 is a schematic cross-sectional view of a test body of Comparative Example 1.

FIG. 5 is a schematic cross-sectional view of a test body of Comparative Example 2.

FIG. 6 is an explanatory view showing a method for measuring the impact resistance of a test body.

[Explanation of symbols]

 Reference Signs List 10 heat-resistant transparent crystallized glass plate 11 PFA film 12 FEP film 13 soda glass plate 14 PVB film

Claims (1)

(57) [Claims] To 1. A plurality of transparent glass plates, a fluororesin film comprising only chain molecular structure I is bonded
And at least one of the transparent glass plates has a thickness of -10 to 10
A heat-resistant transparent crystallization gas having a coefficient of thermal expansion of × 10 ^-7 / ° C
Lath plate, the thickness of the fluororesin film is 0.0
A fireproof safety glass having a size of 2 to 1 mm .