KR100827734B1 - Fireproof glass - Google Patents

Abstract

The present invention provides a fire-resistant glass that is free from manufacturing and quality problems, increases safety in breakage of the glass, and does not degrade fire protection performance. The fire prevention glass 1 by this invention integrally coat | covers the resin film 3 which has heat resistance and transparency to the plate surface of the glass plate main body 2 which comprises a fire prevention glass, and the fire prevention glass 1 supports the support material 5 The gap between the resin film 3 and the support material 5 is less than or equal to a predetermined value when inserted into the support frame 4 with the gap therebetween.

Fireproof glass, heat resistance, transparency, resin film, support material, support frame, polyester resin

Description

Fireproof Glass {FIREPROOF GLASS}

BRIEF DESCRIPTION OF THE DRAWINGS The longitudinal cross-sectional view which shows the installation situation of the fire prevention glass which concerns on one Embodiment of this invention.

2 is a longitudinal cross-sectional view showing an installation situation of a fire prevention glass according to another embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

1: fireproof glass, 2: glass plate body, 3: resin film, 4: support frame, 5: support material

This invention relates to the fire prevention glass comprised by the glass plate main body.

This glass improves the daily safety of the glass by preventing the glass from falling or scattering when the glass is broken by the collision of the human body or other objects. PVB (polyvinyl butyral) is conventionally used between two glass plate bodies. The laminated glass which put the resin film (henceforth abbreviated as PVB film) consisting of resin, and crimped | bonded is used.

However, the ignition point of the PVB film sandwiched between the laminated glass is around 260 ° C, and according to the fire test, the temperature of the glass plate body plate surface exceeds 300 ° C before and after 10 minutes of heating, and the PVB film ignites and loses fire protection performance. For this reason, although this type of laminated glass has high safety of ordinary glass, there is a problem as fireproof glass, and a fireproof glass having not only daily safety but also high fire protection performance is desired.

In recent years, in response to such a demand, a laminated glass in which a THV film made of a THV (tetrafluoroethylene hexafluoropropylene vinylidene fluoride) resin is employed as an intermediate resin film and the fire resistance is improved.

However, in the case of laminated glass sandwiching a THV film, there are problems in cost, manufacturing method, and the like. Specifically, first, since the THV film is based on a fluororesin, the cost is high. THV film also has a problem in toxicity when the film is vitrified and decomposed. Furthermore, in order to adhere | attach a glass plate main body and a glass plate main body through this THV film, special manufacturing equipment is needed and conventional equipment cannot be used.

This invention is made | formed in view of the said situation, The subject is providing the fireproof glass which does not have a problem in manufacture and a quality, improves the safety at the time of glass breakage, and does not reduce fire prevention performance.

In order to solve such a problem, as for the characteristic structure of the fire prevention glass of this invention, as described in Claim 1, the resin film which has heat resistance and transparency is integrally coat | covered by the plate surface of the said glass plate main body, When the said fire prevention glass is inserted into the support frame through the support material, the space | interval of the said resin film and the said support material is below a predetermined value.

The operational effect achieved from such a characteristic structure is as follows.

That is, in the fire prevention glass of this invention, since the resin film which has heat resistance is coat | covered on the plate surface of a glass plate main body, the fire prevention performance of a glass plate main body can be improved. In addition, since the resin film is coated so as to be integral with the plate surface, it is easy to prevent the glass from falling or scattering even if the glass is broken due to the collision of the human body or other objects, and the daily safety of the glass can be improved. In addition, since the resin film also has transparency, for example, when the glass plate body is transparent, its transparency is not lowered.

In order to comprise the fire prevention glass of this invention, since a resin film is only coat | covered integrally with the plate surface of a glass plate main body, manufacturing cost is half or less compared with the laminated glass type mentioned above. In addition, no special manufacturing equipment is required, so it can be easily manufactured at low cost.

Therefore, the fire prevention glass by this invention is excellent in safety because it is comprised by the low cost glass plate as a whole, since falling of glass, scattering, etc. hardly occur. In addition, since the fire resistance can be improved, for example, it can be used as a window glass or a door which is unlikely to catch fire even if a fire occurs, which is useful in terms of safety and disaster prevention.

In addition, when the fireproof glass is inserted into the support frame with the supporting material interposed therebetween, the crack between the resin film and the supporting material is less than a predetermined value, thereby preventing the cracks generated in the glass plate main body portion from advancing to the center of the glass plate powder. Can be. There is a predetermined friction force between the support material and the glass surface (plate surface of the glass plate body), and this friction force acts as a restraining force on the glass surface to act as a restraining force on the plate edge to achieve the effect of suppressing crack generation. However, if the resin film is separated from the support material by a predetermined value or more, the constraint force by the resin film does not reach the position of the support part when a crack is to be generated from the glass plate body edge. As a result, the stress that tries to generate the crack overcomes the restraint by the support material and the crack occurs. Therefore, when the said fire prevention glass is inserted in the support frame with the support material interposed, it is preferable that the space | interval of the said resin film and the said support material is below a predetermined value. By setting the said interval to below a predetermined value, even when a fireproof glass is broken, the support performance of a fireproof glass can be improved, the fall and the scattering of a broken part can be prevented, and safety can be improved.

In addition, in this invention, the "glass plate main body edge part" means the edge part of the glass plate main body and the edge of a plate surface generically, and "glass plate main body center part" refers to the part except the "glass plate main body edge part" among the said glass plate main body. .

In addition to the structure described above, when the resin film is made of polyester resin as described in claim 2, the following effects are achieved.

The polyester resin burns on its own, but the heat of combustion is 500 kcal / kg, which is lower than that of other resins, and is excellent in heat resistance in the same thermoplastic resin, and is a flame retardant material in the resin material. Therefore, the fire protection performance of a glass plate main body can be improved.

Moreover, a polyester resin is also advantageous at the point which aims at preventing the scattering of the fragments at the time of glass breakage. That is, the polyester resin has better tear strength than other resins, so that even when the film thickness is very thin, the scattering prevention performance is high. Thus, sufficient daily safety can be achieved.

In addition, polyester resin is a material which is inexpensive and easy to process.

And even when the polyester resin is integrally coated on the plate surface of the glass plate body, there is no problem in transparency at all, and there is almost no haze or warpage.

In addition, in this invention, "polyester resin" is resin based on polyethylene terephthalate, and means polyester-type thermoplastic resin, polyester-type thermoplastic elastomer, polyester fiber, etc.

Moreover, as described in Claim 3, it is preferable that the said predetermined value is 5 mm. That is, it is preferable that the space | interval of a resin film and a support material is 5 mm or less when a fire prevention glass is inserted into a support frame with a support material interposed. This is because the crack generation inhibiting effect described in connection with claim 1 can be more reliably exhibited, and also in the case of glass breakage, the supporting performance of the fire protection glass is high, and the safety can be improved by preventing falling or scattering. to be. Moreover, when the said space | interval exceeds 5 mm, the crack which arose in the edge part of a glass plate main body tends to advance to a glass plate main-body center part, and it is unpreferable since the risk of glass fall increases when secondary external force, such as a wind load, is applied.

In addition to the above-described configuration, as described in claim 4, the polyester resin is formed of a sheet-like polyester film, and the polyester film is bonded to the plate surface of the glass plate body with an acrylic adhesive layer interposed therebetween. When it coat | covers, the following effect is achieved.

That is, since the acrylic adhesive has good compatibility with glass and polyester film, it is possible to improve the fire protection performance and daily safety by adhering and coating the sheet-like polyester film on the plate surface of the glass plate using this, and at the same time, the resin film is coated on the glass plate body plate. When coat | covered in, the workability can also be improved.

In addition to the above structure, as described in claim 5, when the thickness of the polyester film is 20 to 200 µm and the thickness of the acrylic adhesive layer is 5 to 20 µm, the following effects are achieved. do.

That is, even if the thickness of a polyester film is thin, for example, a fire prevention performance does not fall very much, but when too thin, it is difficult to obtain sufficient glass support performance at the time of glass breakage. Therefore, in order to fully satisfy | fill the performance regarding safety of glass, it is preferable to make thickness of a polyester film into 20 micrometers or more.

As will be described later, the polyester film is gasified at the time of fire, but when the polyester film is too thick, the time for gasification becomes long. For this reason, there exists a possibility that the temperature of a glass surface may become high before a polyester film is carbonized, a polyester film may ignite, and fire protection performance may fall. Therefore, the thickness of the polyester film is preferably 200 µm or less.

On the other hand, the thickness of the adhesive layer should be as thin as possible, and preferably 20 µm or less, but the peel strength (adhesive force) from the glass plate body plate surface of the polyester film in terms of securing safety for preventing the scattering of glass fragments and the like. It is preferable that it is minimum 5 micrometers or more in order to hold | maintain.

And, since the acrylic adhesive generates toxic cyan gas when decomposed by heat, it is not preferable to use an acrylic adhesive which generates such a toxic gas, but the amount of the acrylic adhesive used is preferably as small as possible. Do.

Other features and effects of the present invention will become apparent from the following description with reference to the accompanying drawings.

Preferred Embodiments of the Invention

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of this invention is described, referring FIG.

The fire prevention glass 1 which concerns on this invention is formed by integrally coating the polyester film 3 (an example of a resin film) on one surface of the glass plate main body 2 of 1 sheet. This fireproof glass 1 is inserted into the chassis frame 4 (an example of a support frame) of a window and is fixed to a structure.

The glass plate main body 2 is made of transparent heat-resistant plate glass having a thickness t of about 8 mm in this embodiment.

The polyester film 3 is formed by adhering a sheet-like polyester film having a thickness of 20 to 200 μm to a plate surface of the glass plate body 2 with an acrylic adhesive layer (not shown) having a thickness of 5 to 20 μm interposed therebetween. It is.

In coating the polyester film 3 on the plate surface of the glass plate main body 2, an adhesive bond layer is formed on the plate surface of the glass plate main body 2 after washing wetted with water, and water is sprayed on the surface of the adhesive layer to form a sheet-like polyester film. The method of sticking (3) and pushing out the moisture between the polyester film 3 and the glass plate main body 2, and drying can be employ | adopted.

In addition, when the dimension of the glass plate main body 2 matches (for example, when a width is constant), the method of pressing the polyester film 3 directly to the plate surface of the glass plate main body 2 by a mechanical roll press can be employ | adopted. It may be.

The coating of the resin film 3 on the glass plate main body 2 is most preferably made up to the cut edge (edge) edge over the whole circumference of the glass plate main body 2 (refer to the upper side of the fire prevention glass shown in FIG. 1).

On the other hand, when the glass plate main body 2 is previously constructed in the chassis frame 4, it is necessary to attach the resin film 3 to the glass plate main body 2 from behind. In that case, it is preferable that the space | interval of the glass plate main body 2 and the sealing material 8 around glass mentioned later becomes 5 mm or less (refer to the lower side of the fire prevention glass shown in FIG. 1). 5 mm or less is preferable because the supporting performance of the fire protection glass 1 is high even when a glass breaks, and it can prevent a fall and the scattering, and can improve safety. Moreover, when the space | interval exceeds 5 mm, the crack which generate | occur | produced in the edge part of the glass plate main body 2 tends to advance to a glass plate main body center part, and when the secondary external force, such as a wind load, is applied, since the danger of glass fall becomes high, it is unpreferable.

The chassis frame 4 is a metal frame body having a recess 10. The fire prevention glass 1 is inserted in the said recessed part 10 by the support material 5 (7, 8), and it is inserted and fixed by the following method.

That is, as shown in Fig. 1, the recess 10 of the chassis frame 4 into which the lower side of the fire protection glass 1 is inserted is made of chloroprene rubber having the function of edge protection of the glass plate body 2. Install the setting block (6). Next, the edge part of the glass plate main body 2 is inserted into the recessed part 10 of the chassis frame 4. And a non-flammable backup material (for example, alumina silicate-based ceramic rope or ceramic sheet) 7 between the glass plate body 2 and the chassis frame 4 without any gaps. To charge. In addition, the glass plate main body is constructed by double-sealing and finishing with the sealing material for fire prevention [support material 5 as an example of support material 5, for example, silicone sealant SE5007 made by Toray Dow Corning Corporation] (8). The edge of (2) is inserted and fixed, and it is fixed to the chassis frame (4).

By inserting and fixing as described above, hot air returned from the gap between the fire protection glass 1 and the chassis frame 4 can be completely blocked, and more stable fire protection performance can be obtained. Moreover, even if a fire arises, the omission of the glass edge part by the heat deformation of the glass plate main body 2 can be prevented.

In addition, in this embodiment, the said glass plate main body 2 is arrange | positioned so that the clearance dimension may be 1 cm in the structure of the edge part with respect to the said support material.

[Other Embodiments]

Hereinafter, another embodiment of the fire prevention glass which concerns on this invention is described.

<1> Installation of the glass plate main body 2 and the chassis frame 4 is not limited to the method demonstrated by previous embodiment.

For example, as shown in FIG. 2, the support material to be used is not a non-flammable backing material 7 but a metal elastic support material which is in surface contact with the chassis frame 4 (for example, a stainless steel having a thickness of 0.5 mm). It is also possible to use 9). When the elastic support member 9 is fixed using the elastic support member 9, radiant heat to the chassis frame 4 can be efficiently transmitted from the elastic support member 9 to the edge portion of the glass plate main body 2, The temperature difference between the center and the edges may be reduced, making it difficult to destroy. In addition, since the elastic support member 9 is made of metal, so that it is difficult to melt, the glass edge portion can be firmly supported, and the deviation of the edge portion can be more surely prevented.

<2> The glass plate main body 2 is not limited to the heat-resistant plate glass demonstrated in previous embodiment. For example, it may be a plate glass with a mesh, heat-resistant tempered plate glass, or the like.

In addition, in the case of the glass plate in the net can be prevented from entering the fire because the fragments are supported by a metal mesh inserted in the middle even if broken in the fire. In addition, in the case of heat-resistant tempered glass, the glass is hard to be broken in case of fire and maintains independence to exhibit fire resistance. Therefore, in any case, the fire protection performance can be further improved.

In addition, a fire prevention glass is not limited to what consists of the glass plate main body of the single plate shown in the previous embodiment, and can also consist of multilayer glass comprised by the some glass plate main body.

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

The resin film which consists of <3> polyester resins is not limited to sticking the sheet-like polyester film as demonstrated in the previous embodiment to the plate surface of a glass plate main body through an adhesive bond layer. For example, resin based on polyester can also be apply | coated (coated) directly to a glass plate main body, In this case, not only can work efficiency be improved, but also the adhesiveness of a glass plate main body and a resin film becomes more favorable.

Experimental Example

[Fire Test]

The fire prevention test of the said fire prevention glass was performed in accordance with the method described in 1990 Ministry of Land, Infrastructure and Transport (now Ministry of Land, Infrastructure, Transport and Tourism) notification No. 1125. Specifically, it is as follows.

In addition, the fire prevention glass which coat | covered the polyester film (thickness 100 micrometers) on one side of the 1830 mmx930 mm heat resistant tempered glass plate (thickness 8 mm) was used for the experiment.

First, the test was done about the fireproof glass plate which coat | covered the polyester film on the glass plate surface on the opposite side to a fire chamber (namely, the glass plate surface on which the fire heat does not directly apply). In this case, when 10 minutes of heating time passed, the polyester film gradually smoked from the center of a high temperature glass plate by the heat which the conductive film conducted through glass, and the smoke spread gradually to the whole glass plate front surface. The polyester film was thermally decomposed and gasified for about 5 minutes. The polyester film did not ignite, but the polyester film was gradually carbonized, leaving only a black black film on the glass surface. As the heating time approached 20 minutes, the black film of carbon also changed to carbon dioxide gas, and the glass plate surface changed to a transparent state. During this time, no ignition occurred in the polyester film.

Next, in the same fire prevention test, the test was done about the fire prevention glass plate which coat | covered the polyester film on the fire chamber side (glass plate surface of the direct fire heat | fever side). In this case, after 10 minutes of heating, the polyester film began to combust with the gasification of the polyester film. However, since such combustion occurred only on the glass plate on the fire chamber side, there was no problem on the non-fire chamber side opposite to the fire chamber.

From the above fire prevention test, the fire prevention glass which concerns on this invention was proved to have passed the 1st fire prevention test of the Japanese Ministry of Construction Notice No. 1125 in 1990.

[Destructive test]

The breakdown test of the said fire prevention glass was done as follows, and the scattering prevention performance at the time of breakage of a fire prevention glass was evaluated.

In addition, the fire prevention glass which coat | covered the polyester film (50 micrometers in thickness) on one side of the plate glass (thickness 6.8 mm) which put the 1930 mm x 864 mm net into the experiment was used.

As the impact member for the failure test, a weight of 45 kg in which a leather bag was filled with a lead ball was used. The so-called shot that suspends the impact body with a wire and simultaneously fixes the fire protection glass to the test frame and freely swings freely from a vertical height of 75 cm (approximately to the impact energy when the adult falls from a stationary state). A back test was carried out (the impactor was priced from a plate surface not coated with a polyester film).

As a result, when it hits the center of glass, fine cracks generate | occur | produce in plate glass, and the shape of the crack was a spider-shaped house, but the surface of the polyester film was in a stable state, and the scattering of glass fragments was not found, There was no breakage of the plate glass.

Moreover, as a comparative example, the test similar to the said test was done about the fire prevention glass which coat | covered the resin film which consists of polyethylene resins instead of the resin film which consists of polyester resins.

In the case of the fire prevention glass of the comparative example, the tendency which was easy to ignite compared with polyester resin was confirmed by the fire prevention test. In the fracture test, the tear strength of the polyethylene film was about half as low as that of the polyester resin, so the glass fragments tended to scatter, and both the fire protection performance and the stability were failed.

In addition, various other resins were also examined, but the resin containing chlorine failed the fire test because harmful chlorine gas was generated in the fire test.

In addition, the resin film which coat | covers the fire prevention glass which concerns on this invention is not limited to what consists of a polyester resin, It can be made of any resin as long as it is resin which has the heat resistance and transparency which can pass the said test.

As described above, according to the present invention, there is no problem in manufacturing and quality, and when the glass breaks, not only the safety is high but also the fire prevention performance does not decrease.

Claims (6)

As fire prevention glass 1 comprised from the glass plate main body 2, The polyester resin film 3 which has heat resistance and transparency is integrally coat | covered by the plate surface of the said glass plate main body 2, When the fire prevention glass 1 is inserted into the support frame 4 via the support material 5, the space between the said resin film 3 and the support material 5 is 5 mm or less, The fire protection glass characterized by the above-mentioned. . delete delete The method of claim 1, The polyester resin is formed of a sheet-like polyester film, The said fired glass was made to adhere | attach and coat the said polyester film on the plate surface of the said glass plate main body (2) with an acrylic adhesive layer interposed. The method of claim 4, wherein The thickness of the said polyester film is 20-200 micrometers, and the thickness of the said acrylic adhesive layer is 5-20 micrometers, The fire prevention glass characterized by the above-mentioned. The method according to any one of claims 1, 4 or 5, The said polyester resin film is a film | membrane which consists of a polyester thermoplastic resin, a polyester thermoplastic elastomer, or polyester fiber, The fire prevention glass characterized by the above-mentioned.

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