JP2002293585A - Fire protective laminated glass plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire protective laminated glass plate is good in appearance, shock resistance and fire protectiveness, and capable of laminating with conventional working conditions. SOLUTION: The fire protective laminated glass 1 is obtained by adhering glass plates 4 to both the surfaces of fluororesin film 2 across adhesive layers 3. For the glass plate 4, the surface compressive stress is >=49 MPa and <=196 MPa, preferably tempered glass of 68-127 MPa is used. Soda lime based glass or boron silicate glass is used. The fluororesin film 2 is composed of a conpolymer of tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride, and its thickness is preferably 0.05-2.0 mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention can be applied to doors of buildings, ships, etc., window openings and viewing windows, lighting covers, etc.
Furthermore, the present invention relates to a fire-resistant laminated glass that can shut off a flame when a fire is encountered and prevent fire from burning.

[0002]

2. Description of the Related Art Conventionally, a single sheet of tempered glass has been studied as fire protection glass.
No. 9 is known. In this fire prevention glass, the surface compressive stress is increased by raising the level of the heat strengthening treatment of soda-lime glass as compared with a normal product. Further, prior to the heat strengthening treatment, the edge portion is cut and polished to reduce the surface (polished surface) roughness to prevent cracks, thereby making it suitable as a single-plate fireproof glass.
The surface compressive stress is set to be 26 kg / mm ² (255 MPa) or more.

JP-A-8-132560 discloses a fire-resistant laminated glass comprising a fluororesin made of a tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride copolymer on one or more fire-resistant glass plates. There has been proposed a fire safety glass having a configuration in which a film is bonded. The fireproof glass plate and the fluororesin film are bonded by thermocompression bonding. It is said that this fire prevention safety glass functions as a fire door in the event of a fire and functions as a safety glass in normal times. Further, as the fire-resistant glass plate to be used, a heat-resistant transparent crystallized glass is preferable, and a tempered glass can also be used.

[0004]

However, in order to obtain the performance as fireproof glass from a single veneer, the above-described steps are required, and as a result, the glass is warped and distorted due to an increase in heat strengthening treatment. There is a problem that the size and size are restricted in use and shape, and that the surface treatment of the edge portion is troublesome and costly.

[0005] In the latter fire-resistant safety glass, since heat-resistant transparent crystallized glass is expensive, its use as a fire-resistant safety glass is limited, and there is a difficulty in widespread use. In place of expensive heat-resistant transparent crystallized glass, when using fire-resistant tempered glass with a higher level of heat-strengthening treatment, when the bonding process that is usually performed industrially is performed, the warpage of the glass and the surface The undulation is at a level that cannot be filled by deformation of the fluororesin film used for the interlayer. As a result, there is a problem that air bubbles remain between the fluororesin film and the glass plate or internal peeling occurs, thereby impairing the appearance, adhesion to the glass plate, and impact resistance.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object the purpose of satisfying the external appearance, impact resistance and fire resistance, and enabling the bonding process to be performed under conventional processing conditions. To provide glass.

[0007]

Means for Solving the Problems As a result of detailed studies on tempered glass, the present inventor has found that there is a correlation between the tempered level of tempered glass and the deterioration of flatness (increased strain) of tempered glass, It has been found that increasing the reinforcement level deteriorates the flatness. By controlling the stress state of the tempered glass, the smoothness of the glass plate is improved, and the good properties as a fireproof laminated glass can be satisfied even if the lamination is performed under the conventional processing conditions. Thus, the present invention has been completed.

In order to achieve the above object, according to the first aspect of the present invention, there is provided a fire-resistant laminated glass in which a plurality of glass plates and a resin film are laminated with at least one tempered glass plate. The tempered glass having a surface compressive stress of 49 MPa or more and 196 MPa or less was used as the tempered glass plate, and each glass plate and the fluororesin film were laminated and integrated via an adhesive layer.

In the present invention, by setting the surface compressive stress of the tempered glass sheet to be 49 MPa or more and 196 MPa or less, the smoothness of the tempered glass sheet is improved, and the laminating process is improved. And, when the bonding process that is usually performed industrially is performed, the warpage of the glass and the undulation of the surface can be filled with the deformation of the fluororesin film used for the interlayer, and the appearance and resistance of the fireproof laminated glass Impact and fire protection are improved. The laminated and integrated glass plate may include not only a tempered glass plate but also a non-tempered glass plate,
Since the non-tempered glass plate has better smoothness than the tempered glass plate, it is favorably adhered to the fluororesin film. Because there is a fluororesin film between the tempered glass plate or between the tempered glass plate and the non-tempered glass plate via an adhesive layer,
Even if the glass plate breaks in normal times, the fragments do not scatter. In addition, it takes time to break the glass, and the security function is enhanced. On the other hand, in the event of a fire, the glass plate breaks due to thermal stress at a stage faster than that of the conventional fire-resistant glass having a higher heat strengthening level, but is held without falling off in a state of being bonded to the fluororesin film. Then, by the time the fluororesin film is decomposed, gasified, diffused, and disappears, the thermally cracked glass is re-welded and functions as a heat insulating layer, so that fire resistance is improved. Further, fluororesins are excellent in transparency and heat resistance, and thus are suitable as interlayer films of fire-resistant laminated glass.

According to a second aspect of the present invention, in the first aspect of the present invention, a plurality of glass plates and a resin film are laminated in a state in which a tempered glass plate is disposed on at least both sides.

In the present invention, since the tempered glass sheets are present on at least both sides, compared with the fireproof laminated glass in which the tempered glass sheets are present only on one side or inside thereof,
Fire protection is further improved.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, there is provided a non-reinforced glass sheet, and the non-reinforced glass sheet is provided with the tempered glass sheet and a fluororesin film and an adhesive layer interposed therebetween. It is laminated and integrated. In the present invention, since the non-tempered glass sheet is laminated and integrated so as to be adjacent to the tempered glass sheet, compared to the fireproof laminated glass in a state where the non-reinforced glass sheet is adjacently laminated and integrated, Fire protection is improved.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the tempered glass sheet is made of soda-lime glass or borosilicate glass. In the present invention, a glass plate is easily available, and the heat treatment can be performed by a normal heat treatment apparatus.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the fluorinated resin film is a ternary copolymer of tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride. Consists of a polymer. In the present invention, the melting point of the fluororesin is 110
Since the melting point is about 180 ° C., which is much lower than the melting point of other fluororesins, workability is improved.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the surface compressive stress of the strengthened glass sheet is 68 MPa or more and 127 MPa.
It is as follows. According to the present invention, a desired tempered glass can be more easily obtained.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. FIG. 1 is a schematic side view showing a basic configuration of a fireproof laminated glass (hereinafter simply referred to as a laminated glass) 1 of the present invention. A laminated glass 1 is made of a reinforced glass plate (hereinafter, referred to as a glass plate) on both surfaces of a fluororesin film 2 with an adhesive layer 3 interposed therebetween.
(Hereinafter, simply referred to as a glass plate) 4. That is, in a state where the glass plates 4 are arranged on both sides, a plurality of glass plates 4
And the fluororesin film 2 are laminated and integrated via the adhesive layer 3. The glass plate 4 has a surface compressive stress of 49 M
Tempered glass of Pa or more and 196 MPa or less, preferably 68 MPa or more and 127 MPa or less is used.

As the glass plate 4, ordinary soda-lime glass or borosilicate glass can be used.
Known methods such as a rolling polishing method and a float method can be employed.
However, it is desirable to employ a glass plate having a smooth surface with few surface defects and distortion, preferably manufactured by a rolling polishing method or a float method.

Although the size of the glass plate 4 is not limited, various sizes can be adopted as long as the size can be processed by the heat strengthening processing means.
000 mm square or a rectangular shape having a length of 5000 mm or less is used. The thickness of the glass plate 4 is not particularly limited, but is preferably, for example, about 4 to 12 mm in consideration of heat-strengthable processing and handling workability.

Examples of the heat strengthening method include a conventional method, for example, a vertical strengthening method in which the glass sheet 4 is thermally strengthened while being held in a vertical state, and a horizontal strengthening method in which the glass sheet 4 is thermally strengthened while being conveyed on a roll. Can be adopted as appropriate, and the method may be appropriately selected and used. However, when the surface compressive stress after the strengthening treatment is increased, the latter method is preferable. The heat treatment conditions are set only by setting the heating temperature and cooling conditions by air cooling, and the latter are set by combining the heating and cooling conditions and the condition of the interval between the transport rolls. When heating the glass plate 4 on a transport roll,
Since the semi-molten glass sheet is bent between the transfer rolls and undulations are generated on the surface, the interval and the diameter of the transfer rolls are appropriately set so as to reduce the bending.

The tempered glass has a surface compressive stress of 49 to 196.
The use of a tempered glass having a surface compressive stress of 68 to 127 MPa obtained by heat strengthening treatment according to JIS R3206 is easy to obtain and industrially efficient. At this strengthened level, fire protection cannot be ensured even when used as a veneer for fire protection glass, but fire protection can be ensured by using the laminated glass 1 of the present invention.

As the fluororesin film 2 used as an intermediate film of the laminated glass 1, a monomer component constituting the fluororesin is vinylidene fluoride, vinyl fluoride, trifluoroethylene, tetrafluoroethylene, pentafluoropropylene, hexafluoropropylene. Examples include a homopolymer or copolymer of a fluorinated monomer such as propylene, and a copolymer in which a vinyl monomer such as ethylene or alkyl vinyl ether is used in combination with the fluorinated monomer. Any material that can be melt-molded and formed into a sheet shape may be used, and a fluorine-based resin other than a tetrafluoroethylene homopolymer can be used without any particular limitation. Specifically, polyvinylidene fluoride, polyvinyl fluoride, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene-ethylene copolymer, tetrafluoroethylene-
Relatively transparent fluororesins such as a hexafluoropropylene copolymer and a terpolymer of tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride are exemplified.

Fluororesins are excellent in transparency and heat resistance and are therefore suitable as interlayers for fire-resistant laminated glass. Above all, a terpolymer of tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride (hereinafter, referred to as a THV copolymer) has properties such as high tensile strength and excellent impact resistance. It is suitable. The THV copolymer is 110 to 180.
Since it has a melting point as low as ° C., no special laminating equipment is required. The preferred copolymerization ratio of the THV copolymer is 20 to 40% by weight of vinylidene fluoride, 20 to 60% by weight of tetrafluoroethylene, and 5 to 30% by weight of hexafluoropropylene.

The thickness of the fluororesin film 2 is 0.05 m
m or more, more preferably 0.2 mm or more. If the thickness is less than 0.05 mm, the fluorine resin film 2 cannot compensate for the warpage of the glass plate 4 and the undulation of the surface, and air bubbles remain after the bonding process,
Poor appearance, lower adhesion to glass plate 4, and lower impact resistance are likely to occur. Further, even if the thickness is larger than 2.0 mm, the function as a fireproof laminated glass cannot be expected to be improved only by increasing the cost, so that the thickness is preferably 2 mm or less. Therefore,
The thickness may be appropriately selected in the range of 0.05 to 2 mm.

As the method for producing the fluororesin film 2, a known method can be adopted, and for example, a method of forming a film by thermoplastic molding such as extrusion molding, calender molding or the like is possible.

The adhesive constituting the adhesive layer 3 is not particularly limited. For example, an acrylic, fluorine, silicone, or vinyl adhesive can be used. Among them, an acrylic adhesive is preferable. Can be used for It is also preferable to interpose an adhesion promoter such as a silane coupling agent in order to strengthen the adhesion to the glass plate 4. Also,
The adhesive layer 3 may be applied to the glass surface or may be laminated on the fluororesin film 2 in advance.

The thickness of the adhesive layer 3 is preferably 0.001 to 5 μm. If the thickness is less than 0.001 μm, sufficient adhesive strength between the glass plate 4 and the fluororesin film 2 cannot be obtained,
Even if the thickness is larger than μm, the adhesive strength is saturated, and further increase in the adhesive strength cannot be expected.

The bonding between the glass plate 4 and the fluororesin film 2 can be performed by a known method, and the laminated materials in the order of lamination are heated and pressurized to bond the fluororesin film 2 with the adhesive layer 3 interposed therebetween. It can be adhered to the glass plate 4 in close contact. As the heating means, a heating furnace, a heating roll or the like can be used, and as the pressing means, a press plate treatment, a nip roll passage treatment, a vacuum bag method of performing a decompression treatment enclosed in a rubber bag, or the like can be used. I just need. For these facilities, commonly used facilities can be used.

Next, the operation of the laminated glass 1 configured as described above will be described. The surface compressive stress of the glass plate 4 is set to 49
By setting it to not less than MPa and not more than 196 MPa, the smoothness of the glass plate 4 is improved, and when a bonding process which is usually performed industrially is performed, a gap generated due to warpage of the glass and undulation of the surface is formed in the interlayer film. It is filled with the deformation of the fluororesin film 2 used. As a result, no bubbles remain between the fluororesin film 2 and the glass plate 4, and the appearance, impact resistance and fire resistance of the laminated glass 1 are improved.

In normal times, when an object collides with the laminated glass 1 or when an impact is applied to break the laminated glass 1, the fluororesin film 2 exists between the glass plates 4 via the adhesive layer 3. Therefore, the glass plate 4 is hard to break,
Moreover, even if it is damaged, the fragments do not scatter.

In the event of a fire, of the glass plates 4 on both sides of the laminated glass 1, the glass plate 4 on the side corresponding to the flame
However, first, thermal cracks occur due to thermal stress. Since the surface compressive stress of the glass plate 4 is smaller than the surface compressive stress of the tempered glass used as fire protection glass as a single plate, the glass plate 4 is broken by the thermal stress at a faster stage than the conventional fire-resistant glass having a higher heat strengthening level. However, the glass piece is held without falling off in a state of being adhered to the fluororesin film 2, thereby preventing the flame from directly hitting the fluororesin film 2. As the temperature increases, the decomposition and gasification of the fluororesin film 2 progresses, but the generated gas diffuses through the gap between the broken glass pieces on the side facing the flame, so that the pressure between the two glass plates 4 is reduced. It does not become so high that the outer glass plate 4 is broken. Then, by the time the fluororesin film 2 is decomposed, gasified, diffused and disappears, the thermally cracked glass is re-welded and functions as a heat insulating layer, so that fire resistance is improved.

(Examples and Comparative Examples) Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. As an example and a comparative example, a laminated glass in which the thickness of the fluororesin film 2 and the value of the surface compressive stress of the glass plate 4 were changed was prepared, and the appearance observation, adhesive strength (boil strength), impact resistance and fire resistance were prepared. An evaluation was performed.

A sample used for evaluation was prepared as follows. THV as a fluororesin film 2, a soda-lime glass plate or a borosilicate glass plate having a thickness of 6 mm and a predetermined size according to the purpose of evaluation as a glass plate 4, an acrylate copolymer and an epoxy resin as an adhesive An adhesive consisting of a mixture of silane coupling agents was used. The bonding of the glass plate 4 and the fluororesin film 2 was performed at 140 ° C. for 20 minutes using a vacuum bag.

The size of the glass plate 4 is 50 for appearance observation.
0x500mm, 300x300m for boiling strength test
m, 193 for impact resistance evaluation (for shotback test)
0 × 864 mm, 800 × 500 for fire test.
The surface compressive stress of the glass plate 4 was measured by a known photoelastic method using an FMS-60 surface stress meter (using a Na lamp light source) manufactured by Asahi Techno Glass Co., Ltd.

[Evaluation of Laminated Glass] <Evaluation of Appearance> The appearance of the laminated glass 1 for observing the appearance was visually observed. A sample having no residual air bubbles or exfoliation of the end portion between the glass plate 4 and the fluororesin film 2 was judged as acceptable (O),
A case where there was residual air bubbles or peeling at the end was judged as failed (x).

<Evaluation of Adhesive Strength (Boil Strength)> JISR3
205 boiling tests were performed. The laminated glass 1 was immersed in the boiled water for 2 hours, and a pass (端) was obtained if the lifting of the edge was within 13 mm, and a reject (x) was obtained if it exceeded 13 mm.

<Evaluation of Impact Resistance> The impact resistance test was performed according to JISR.
The test was performed by a method according to the shotback test of 3205. Laminated glass 1 is fixed to a predetermined test frame, and 45 kg
Is dropped freely in a pendulum manner so that it strikes the center of the sample with a steel stranded wire. The falling distance from the standstill of the striker is 120 cm, and if the glass is not broken,
When the glass was broken, it was judged as "x", and when it penetrated, it was judged as "x".

<Fire Protection Test> A judgment was made by heating the laminated glass 1 for the fire protection test based on the standard heating curve of Article 112, Paragraph 1 of the Building Standards Law Enforcement Order using a gas heating furnace. Judgment is made for specific fire prevention equipment (6
(Holding for 0 minutes) was rated as ○, retention for 20 minutes without flame passage was rated as Δ, and less than 20 minutes without flame passage was rated as x. The standard for specific fire prevention equipment (holding for 60 minutes without passing through a flame) is based on the old Ministry of Construction Notification No. 11
This is equivalent to passing grade A based on No. 25.

Table 1 shows the evaluation results of the examples and comparative examples.

[0039]

[Table 1] As is clear from Table 1, the surface compressive stress was 49 to 196.
In the case of Example 1 in the range of MPa, the appearance, adhesive strength,
○ in all evaluation items of impact resistance and fire protection (fire protection test)
(Passed). On the other hand, Comparative Example 1 (surface compressive stress is 0 MPa (no heat strengthening treatment)) and Comparative Example 2 (surface compressive stress is 29 MPa) in which the surface compressive stress is smaller than 49 MPa.
In Comparative Example 1, the evaluation items of the appearance and the adhesion were ○, but the evaluation items of impact resistance and fire resistance were × in Comparative Example 1 and Δ in Comparative Example 2. More specifically, in Comparative Example 1, the shotback stopped in a state where the striking body was immersed in the laminated glass, and the fire prevention test fired in 7 minutes. In Comparative Example 2, the glass was broken in the shotback, and the fire started in 25 minutes in the fire prevention test. That is, the surface compressive stress of the glass plate 4 is 49 MPa.
When the size is smaller, the appearance and the adhesiveness are good, but the impact resistance and the fire resistance are insufficient.

In Comparative Example 3 in which the surface compressive stress was larger than 196 MPa (the surface compressive stress was 240 MPa), the evaluation items of the appearance and the adhesive strength were rejected. More specifically, in the state of appearance observation, some local bubbles remained between the glass plate 4 and the fluororesin film 2, and peeling occurred at the end of the laminated glass 1. Then, in the boiling test, the lifting proceeded to 18 mm. Therefore, the impact resistance and fire protection tests were not performed. From the above results,
When the surface compressive stress of the glass plate 4 was in the range of 49 to 196 MPa, it was confirmed that the glass plate 4 had satisfactory performance as fireproof laminated glass.

When the thickness of the fluororesin film 2 is changed, in the case of Example 2 having a thickness of 0.2 to 2.5 mm,
All of the evaluation items of appearance, adhesive strength, impact resistance and fire resistance were ○ (pass).

In Example 3, a borosilicate glass plate was used as the glass plate 4 under conditions that could be used as fireproof laminated glass when a soda-lime glass plate was used as the glass plate 4. In this case, as in the first and second embodiments,
The results were ○ for all evaluation items.

This embodiment has the following effects. (1) Since a tempered glass plate having a surface compressive stress of 49 MPa or more and 196 MPa or less is used as the glass plate 4 used for the laminated glass 1, the smoothness of the tempered glass plate is improved, and the bonding workability is improved.

(2) Since the glass plate 4 has a small warpage or undulation and is laminated and integrated via the fluororesin film 2 and the adhesive layer 3, the bonding process which is usually performed industrially is performed. However, the warpage of the glass plate 4 and the undulation of the surface are buried by the deformation of the fluororesin film 2 so that no bubbles remain, and the appearance, impact resistance and fire resistance of the laminated glass 1 are improved.

(3) Since the glass plate 4 and the fluororesin film 2 are bonded via the adhesive layer 3, even if the glass plate 4 is damaged in a normal state, no fragments are scattered. In addition, it takes time to break the glass, and the security function is enhanced. On the other hand, in the event of a fire, the glass plate 4 on the side corresponding to the flame breaks faster due to thermal stress than conventional fire-resistant tempered glass. It is kept without falling off. And
By the time the fluororesin film 2 is decomposed, gasified, diffused and disappears, the thermally cracked glass is re-welded and acts as a heat insulating layer, so that fire resistance is improved. That is, since it is not necessary to raise the temperature at which the glass plate 4 is thermally cracked by thermal stress, it is not necessary to raise the level of the heat strengthening treatment more than usual, and the glass plate is less likely to be warped or distorted during the heat treatment, so A laminated glass 1 having excellent properties is obtained. Further, since the fluororesin is excellent in transparency and heat resistance, it is suitable as an intermediate film of the fire-resistant laminated glass 1.

(4) Since the glass plate 4 is made of soda-lime glass or borosilicate glass, the glass plate can be easily obtained, and the heat treatment can be performed by a usual heat treatment apparatus, so that the production cost can be reduced.

(5) TH as the fluororesin film 2
When the V copolymer is used, the melting point is 110 to 180 ° C., which is significantly lower than the melting points of other fluororesins, so that the workability is further improved and the bonding operation is easier.

(6) The surface compressive stress of the glass plate 4 is 68
When the pressure is not less than MPa and not more than 127 MPa, a desired tempered glass can be more easily obtained. The embodiment is not limited to the above, and may be embodied as follows, for example.

The laminated glass 1 has glass plates 4 on both sides.
It is sufficient that a plurality of glass plates 4 and the fluororesin film 2 are laminated and adhered via the adhesive layer 3 in a state where is disposed, and a configuration in which three glass plates 4 are bonded as shown in FIG. Alternatively, four or more glass plates 4 may be bonded together. This case also has the same effect.

The laminated glass 1 is not limited to a structure in which only a strengthened glass plate (glass plate 4) is laminated and integrated via a fluororesin film 2 and an adhesive layer 3 as shown in FIG.
As shown in FIG. 3A, a configuration in which the non-reinforced glass plate 5 is disposed inside, or a configuration in which the non-reinforced glass plate 5 is disposed on both surfaces as shown in FIG. FIG.
(A) As shown in FIG.
May be arranged. Also in these configurations, since the non-reinforced glass plate 5 is laminated and integrated with the strengthened glass plate 4 via the fluororesin film 2 and the adhesive layer 3, the non-reinforced glass plate 5 is thermally stressed during a fire. Even if it is cracked, it is held without falling off while being bonded to the fluororesin film. A soda-lime glass plate or a borosilicate glass plate is also used as the non-tempered glass plate 5.

A soda-lime glass plate may be used as a part of the plurality of glass plates 4 constituting the laminated glass 1, and the rest may be a borosilicate glass plate. For example, when two glass plates 4 are used as shown in FIG. 1, one is a soda-lime glass plate and one is a borosilicate glass plate.

The glass plate 4 constituting the laminated glass 1
When three or more sheets are used, the glass plates 4 arranged on both sides
Only the glass plate having a surface compressive stress of 49 MPa or more and 196 MPa or less was used, and the other glass plates were used.
A glass plate smaller than MPa may be used.

The technical ideas (inventions) that can be grasped from the above embodiment will be described below. (1) In the invention according to any one of claims 1 to 4, the thickness of the fluororesin film is 0.05 mm.
That is all.

(2) In the invention according to any one of the first to fourth aspects, the adhesive constituting the adhesive layer contains a silane coupling agent.

[0055]

As described above in detail, according to the first to fourth aspects of the present invention, the appearance, impact resistance and fire resistance can be satisfied, and the bonding can be performed under the conventional processing conditions. .

[Brief description of the drawings]

FIG. 1 is a partial schematic view of a fire-resistant laminated glass according to an embodiment.

FIG. 2 is a partial schematic view of a fire-resistant laminated glass according to another embodiment.

FIG. 3 is a partial schematic view of a fire-resistant laminated glass according to another embodiment.

FIG. 4 is a partial schematic view of a fire-resistant laminated glass according to another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Fire-resistant laminated glass (laminated glass), 2 ... fluororesin film, 3 ... adhesive layer, 4 ... tempered glass plate (glass plate), 5 ... non-tempered glass plate.

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[Procedure amendment]

[Submission date] October 10, 2001 (2001.10.
10)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0055

[Correction method] Change

[Correction contents]

[0055]

As described in detail above, claims 1 to 1
According to the invention described in Item 6 , the appearance, impact resistance, and fire resistance can be satisfied, and the bonding can be performed under conventional processing conditions.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4G061 AA04 AA06 AA28 BA01 BA02 CA02 CB03 CB04 CB16 CD02 CD18 DA23 DA43

Claims (6)

[Claims] 1. A fire-resistant laminated glass in which a plurality of glass plates and a resin film are laminated with at least one tempered glass plate, wherein the tempered glass plate has a surface compression stress of 49 MPa or more and 196 MPa or less. A fireproof laminated glass characterized in that each of the glass plates and the fluororesin film are laminated and integrated via an adhesive layer using the tempered glass of (1). 2. The fire-resistant laminated glass according to claim 1, wherein a plurality of glass plates and a resin film are laminated in a state where tempered glass plates are arranged on at least both sides. 3. The fireproof laminate according to claim 1, further comprising a non-tempered glass plate, wherein the non-tempered glass plate is laminated and integrated with the tempered glass plate via a fluororesin film and an adhesive layer. Glass. 4. The fire-resistant laminated glass according to claim 1, wherein the tempered glass plate is made of soda-lime glass or borosilicate glass. 5. The fluororesin film is made of a terpolymer of tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride.
A fire-resistant laminated glass according to any one of the above. 6. The tempered glass sheet has a surface compressive stress of 68.
The pressure is not less than MPa and not more than 127 MPa.
A fire-resistant laminated glass according to any one of the above.