JP2013023987A - Fireproof double glazing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fireproof double glazing which is excellent in durability and fire and flame resistance and easily manufactured.SOLUTION: In a fireproof double glazing 10, a butyl sealant having high moisture permeation resistance is used as a primary seal member 18A, 18B, and a flame retardant is mixed in the butyl sealant to improve the fire and flame resistant performance of the fireproof double glazing. The application amount of the flame retardant-mixed butyl sealant is prescribed to be 2 g or more and less than 7 g per 1 m length of a spacer. By prescribing the application amount to be 2 g or more, the durability of the fireproof double glazing due to displacement of a glass plate is improved, and by prescribing it to be less than 7 g, the fire and flame resistance of the fireproof double glazing is improved.

Description

  The present invention relates to fireproof double glazing.

  Among the double-glazed glass, what is called fire-proof double-glazed glass is such as at least one of the glass plates constituting the fire-proof double-glazed glass such as netted glass, heat-resistant tempered glass, low expansion tempered glass, transparent crystallized glass, etc. This refers to the use of heat and fireproof glass plates.

  In addition, a general multilayer glass is formed by separating at least two glass plates facing each other through a spacer, and separating each side surface of the spacer facing these two glass plates with a primary sealing material. It is configured by adhering to a glass plate and sealing the outside of the primary sealing material with a secondary sealing material.

  The primary sealing material is an indispensable component for maintaining the dry state of the hollow layer of the multi-layer glass, and is an organic butyl sealing material having good adhesion to the glass plate and high moisture resistance ( Butyl rubber) is generally used. Moreover, also in the fireproof multilayer glass mentioned above, the same butyl-type sealing material is used as a primary sealing material.

  By the way, the multi-layer glass is subjected to displacement of the glass plate due to expansion and contraction of the hollow layer due to temperature change or pressure change, and displacement of the glass plate caused by wind pressure or the like.

  When the primary sealing material on both side surfaces of the spacer is 1 g or less per 1 m of the length of the spacer, the thickness of the primary sealing material after assembling the multilayer glass and the depth of the primary sealing material cannot be sufficiently secured, When subjected to the displacement of the glass plate as described above, the primary sealing material is lost in the thickness direction or depth direction, so that the airtightness of the hollow layer portion is impaired, and the durability as a multilayer glass is lowered. There was a problem that the risk of doing so would be very large.

  In Patent Document 1, in order to provide a long-life multilayer glass, the amount of primary sealant applied to both side surfaces of the spacer is 4 g and 7 to 12 g per 1 m of the spacer length. A layer glass is disclosed. Further, Patent Document 1 also describes that a general application amount of the primary sealing material is 2.5 g per 1 m of the spacer length.

  On the other hand, when the glass plate that constitutes the fireproof double-glazed glass breaks due to high heat on the side that is not the fire occurrence side (hereinafter referred to as the heating surface side) (hereinafter referred to as the non-heating surface side). In some cases, combustible gas is generated from the primary sealing material that has become high temperature, and the primary sealing material itself may burn, and there is a risk that a flame may be generated on the non-heated surface side.

  Therefore, if the application amount of the primary sealing material is 1 g or less per 1 m of the length of the spacer, the amount of flammable gas generated from the primary sealing material is reduced. Can be suppressed.

  Therefore, in order to improve the fireproof performance of the multi-layer glass, it is desirable that the coating amount of the primary sealing material is 1 g or less per 1 m of the length of the spacer. There has been a problem that the risk of a decrease in durability becomes very large.

  On the other hand, the fireproof double-glazed glass of Patent Document 2 has an inner surface sealing material layer formed inside the primary sealing material, and the inner surface sealing material layer enhances fire resistance and flame retardancy.

  In addition, the fireproof double-glazed glass of Patent Document 3 has a fireproof and flameproof performance by interposing a moistureproof seal material between a primary seal material composed of a layer of flame retardant tape and a flame retardant secondary seal material. Is increasing.

JP-A-6-185267 JP 7-237941 A JP 2001-12157 A

  However, the fireproof double-glazed glass of Patent Document 2 has a problem that it must be provided with an inner surface sealing material layer in addition to the primary sealing material and the secondary sealing material, and the number of parts increases and the manufacturing is difficult.

  Moreover, the fireproof multilayer glass of patent document 3 must be equipped with a moisture-proof seal material in addition to the primary seal material and the secondary seal material, and is difficult to manufacture like the fireproof multilayer glass of patent document 2. There was a problem.

  That is, the fireproof multilayer glass of Patent Documents 2 and 3 has a seal three-layer structure having other sealing material layers in addition to the primary sealing material and the secondary sealing material. Therefore, the fireproof double-glazed glass of Patent Documents 2 and 3 cannot be produced by an equipment for producing an ordinary double-glazed glass having a sealed double-layer structure composed of a primary sealing material and a secondary sealing material, and is a dedicated equipment. Was necessary.

  Moreover, in these sealing parts, a sealing part may become large compared with general multilayer glass, and the problem may arise in the designability.

  This invention is made | formed in view of such a situation, and it aims at providing the fireproof double glazing which is excellent in durability and fire-resistant flame retardance, and is easy to manufacture.

  In order to achieve the above object, the present invention provides that at least two glass plates facing each other are separated by a spacer, and each side surface of the spacer facing the two glass plates is formed by two primary sealing materials. Each of the glass plates is a multi-layer glass in which a hollow layer is formed between the two glass plates and the outer side of the primary sealing material is sealed by the secondary sealing material, and at least one glass plate is In the fireproof multi-layer glass composed of a heat and fireproof glass plate, the primary sealing material is a butyl sealant mixed with a flame retardant, and each side of the spacer has 2 g to 7 g per 1 m of the spacer length. There is provided a fireproof double glazing characterized by comprising less than the butyl sealant.

  According to the present invention, the primary sealing material, which is a constituent requirement of the fireproof multilayer glass, is a butyl sealant having a high moisture resistance, and a flame retardant is blended with the butyl sealant to provide the fireproof and flameproof fireproof multilayer glass. Increased performance. That is, according to the present invention, a fireproof multilayer glass can be produced by applying a butyl-based sealing material containing a flame retardant to each side surface of a spacer. That is, a fireproof double-glazed glass excellent in fire resistance and flame resistance can be produced with an equipment for producing a normal double-glazed glass having a seal double-layer structure composed of a primary seal material and a secondary seal material. Therefore, according to the fireproof double-glazed glass of the present invention, it can be easily manufactured as compared with the fireproof double-glazed glass having a seal three-layer structure disclosed in Patent Documents 2 and 3.

  Moreover, in this invention, the application quantity of the butyl type sealing material which mix | blended the flame retardant was prescribed | regulated as 2 g or more and less than 7 g per 1 m of spacer length. By prescribing to 2 g or more, the durability of the fireproof multilayer glass with respect to the displacement of the glass plate is improved. Moreover, the fireproof flame-retardant performance of fireproof double glazing improves by prescribing that it is less than 7 g. In other words, even in the case of a butyl sealant containing a flame retardant, if the amount of butyl sealant applied is 7 g or more per 1 m of spacer length, fire resistance and flame retardancy deteriorates due to an excessive amount of application. Because it does. Patent Document 1 discloses that the application amount of the primary sealing material is 2.5 g, 4 g, and 7 to 12 g per 1 m of the spacer length. However, the primary sealing material is a butyl sealant. In addition, it is not disclosed that a flame retardant is blended. Therefore, the double-glazed glass of Patent Document 1 is not a fire-proof double-glazed glass considering fire-resistant and flame-retardant performance.

  It is preferable that 2 g or more and 5.5 g or less of the butyl-based sealing material is provided on each side surface of the spacer per 1 m of the length of the spacer.

  It is preferable that 2 g or more and 4 g or less of the butyl-based sealing material is provided on each side surface of the spacer per 1 m of the length of the spacer.

  It is preferable that 2 g or more and 3.5 g or less of the butyl-based sealing material is provided on each side surface of the spacer per 1 m of the length of the spacer.

  Each side surface of the spacer is preferably provided with 2 g or more and 2.7 g or less of the butyl sealant per 1 m of the length of the spacer.

  By defining the coating amount of the butyl sealant as described above, the fireproof double glazing of the present invention can further improve the fireproof and flameproof performance while maintaining the durability.

  According to the fireproof double-glazed glass of the present invention, it is excellent in durability and fire-resistant flame resistance, and is easy to produce.

The principal part expanded sectional view of the fire prevention multilayer glass of embodiment Overall perspective view of simple test equipment Explanatory drawing of heating a sample using a burner in a simple test device Graph showing simple test results

  Hereinafter, preferred embodiments of the fireproof multilayer glass according to the present invention will be described in detail with reference to the accompanying drawings.

  The fire-proof multilayer glass 10 of the embodiment shown in the cross-sectional view of FIG. 1 is opposed to two glass plates 12 and 14 while two glass plates 12 and 14 facing each other are separated by a spacer 16. The side surfaces 16A and 16B of the spacer 16 are bonded to the two glass plates 12 and 14 by primary sealing materials 18A and 18B, respectively. Thereby, the hollow layer 20 is formed between the two glass plates 12 and 14. Further, the outer sides of the primary sealing materials 18A and 18B are sealed by the secondary sealing material 22.

  As the spacer 16, a metal spacer mainly made of aluminum is often used, but a spacer made of stainless steel or hard resin may also be used. The spacer 16 has a hollow portion 24 therein, and the hollow portion 24 is filled with a desiccant 26 such as granular zeolite. The spacer 16 has a through hole 28 that allows the hollow portion 24 to communicate with the hollow layer 20, and the air in the hollow layer 20 is dried through the through hole 28.

  The fireproof multilayer glass 10 thus configured is a netted glass plate in which one glass plate 12 is a heat-resistant fireproof glass plate, and the other glass plate 14 is a non-represented by a general soda lime glass. It is a heat and fire resistant glass plate. In addition, you may use another heat-resistant fireproof glass plates, such as heat-resistant tempered glass, low expansion | strengthening tempered glass, and transparent crystallized glass, as the glass plate 12. FIG.

  In the fireproof double-glazed glass 10 of the present invention, a flame retardant is blended in the primary sealing materials 18A and 18B, which are butyl sealing materials, and the amount of the butyl sealing material applied to the spacer 16 is also defined. This will be described later.

  The primary sealing materials 18A and 18B are formed of polyisobutylene, which is a main component of a butyl sealant, or a butyl (polyisobutylene or butyl rubber) composition in which butyl rubber and a flame retardant are blended. In addition to the rubber component described above, the primary sealants 18A and 18B can be blended with a vulcanizing agent, a vulcanization accelerator, a vulcanization aid, and the like, which are generally used for rubber molding, and a vulcanization retarder. . Furthermore, other additives and the like can be blended as long as the effect is not impaired. Examples of the additive include fillers such as carbon black, silica, clay, talc, calcium carbonate, wax, silane coupling agent, activator, plasticizer, softener, anti-aging agent, antioxidant. , Lubricants, pigments, ultraviolet absorbers, dispersants, dehydrating agents, tackifiers, antistatic agents, processing aids, and the like. These additives may include those commonly used for rubber compositions. Their blending amounts are not particularly limited, and are arbitrarily selected.

  The kind of flame retardant blended in the primary sealing materials 18A and 18B is not particularly limited, and known ones can be used, and examples thereof include inorganic flame retardants and organic flame retardants. Examples of the inorganic flame retardant include metal hydroxide (aluminum hydroxide, magnesium hydroxide, etc.), antimony compounds (antimony trioxide, sodium antimonate, etc.), and other inorganic compounds (boron compounds, molybdenum compounds). , Red phosphorus compounds, etc.). Of these, metal hydroxides are preferred because of their relatively low toxicity. Examples of the organic flame retardant include halogen compounds (chlorinated paraffin, brominated aromatic triazine compounds, decabromodiphenyl ether, tetrabromobisphenol A derivatives, etc.), phosphorus compounds (ammonium polyphosphates, melamine phosphate, etc.) ), Nitrogen compounds (such as melamine cyanurate) and the like.

  Moreover, the compounding quantity of the flame retardant with respect to the primary sealing materials 18A and 18B is represented by the quantity of the flame retardant added with respect to 100 parts by mass of the base butyl component. (The unit is expressed as part by mass (phr)). That is, the content of the flame retardant in the butyl composition is 5 to 200 parts by mass, preferably 10 to 150 parts by mass with respect to 100 parts by mass of the base butyl component. It is 20 mass parts, More preferably, it is 20-60 mass parts. By blending 5 parts by mass or more of the flame retardant, it is possible to stably meet the fire test standard. Moreover, there exists an advantage that processability, adhesiveness, etc. become moderate by restraining a compounding quantity to 200 mass parts or less.

[Simple test equipment, simple test method, and test results]
First, the amount of primary sealant applied to the butyl sealant and the fireproof flame retardant performance of the fireproof double glazing, and the flame retardant and fire retardant flame retardant of the butyl sealant primary sealant. A simple evaluation of the effect on performance was performed using a single butyl sealant.

  A simple test apparatus 30 shown in FIG. 2 includes a commercially available ceramic hot plate (manufactured by ASONE: CHP-250DN) 32 that can be heated up to 550 ° C. An iron plate (100 × 150 mm: thickness 3 mm) 38 on which a butyl sealing material, which is a sample 36, is placed is placed at a substantially central portion of the heating surface 34 of the ceramic hot plate 32.

  Three fireproof boards (height 20 mm) 40, 40,... Surrounding the sample 36 are placed on the top surface of the iron plate 38, and the plurality of fireproof boards in FIG. 42, 42... Are placed on the fireproof boards 40, 40. Further, a slit 44 having a width of 10 mm and a length of 50 mm is provided between the two fireproof boards 42 and 42 in the center.

  The simple test apparatus 30 is configured as described above, and this simple test apparatus 30 is also provided with a commercially available burner 46 for heating the sample 36.

  Hereinafter, a simple test method will be described.

  First, the switch 48 of the ceramic hot plate 32 is turned on, and the heating of the heating surface 34 is started.

  Next, when the temperature displayed on the display unit 50 of the ceramic hot plate 32 exceeds 300 ° C., the burner 46 is ignited as shown in FIG. 3 so that the flame 52 does not directly hit the sample 36. The sample 36 is held over the slit 36 through the slit 44, and the temperature of the sample 36 is continued in that state. The distance from the center of the flame 52 of the burner 46 to the sample 36 is about 65 mm.

  When the temperature of the sample 36 rises, the decomposition gas generated from the sample 36 ignites, and when the continuous “flame” starts to be generated, the temperature displayed on the display unit 50 is read. Record as flame temperature. This continuous “flaming” is a simple evaluation of “no heating that lasts over 10 seconds on the non-heated surface side after heating for 20 minutes on the heating curve according to ISO834”, which will be described later.

  In the graph shown in FIG. 4, the vertical axis represents “flame HP (hot plate) temperature”, and the horizontal axis represents “simple test evaluation seal amount (sample: butyl sealant)”. In addition, in order to compare the amount of the flame retardant, the sample without the flame retardant, the sample with the flame retardant, and the amount of the flame retardant, “SM488 [butyl-based sealing material (manufactured by Yokohama Rubber Co., Ltd. SM488)] ”(shown by ◆) and“ SM488 + SR-425 (20) [butyl sealant (SM488, manufactured by Yokohama Rubber Co., Ltd.)] + Pyroguard SR-245 (Daiichi Kogyo Seiyaku Co., Ltd.) containing 20 phr of a flame retardant "SM488 + SR-425 (30) [butyl-based sealing material (SM488 made by Yokohama Rubber Co., Ltd.)] + Pyroguard SR-245 (Daiichi Kogyo Seiyaku Co., Ltd.) containing 30 phr of a flame retardant. A sample) (shown by +) was prepared.

  As shown in the graph of FIG. 4, the flame temperature increases as the amount of the three types of samples (♦, ▲, +) decreases.

  Moreover, it turns out that the sample which mix | blended the flame retardant has fire resistance compared with the sample which is not mix | blended with a flame retardant. Further, as can be seen from the results of the samples (＋, +), the effects on the fire resistance of the sample are almost the same when the blending amount of the flame retardant is 20 phr and 30 phr.

  As a result of simple evaluation, the smaller the amount of simple test evaluation, the higher the temperature at which continuous “flame” occurs, and the temperature at which continuous “flame” occurs when a flame retardant is added. It turned out to be high. The fact that the temperature at which “flaming” occurs becomes high is the result of the evaluation of “there is no flame that is heated for 20 minutes on the heating curve according to ISO834 and continues for more than 10 seconds on the non-heated surface side”. The heating time until “flaming” is extended, and it is used as a simple evaluation of “no heating that lasts over 10 seconds on the non-heated surface side after heating for 20 minutes on the heating curve according to ISO834”. It is thought that you can.

[Standard and test method of full-scale fire prevention test]
A test body in which fireproof double-layer glass is assembled to the unit frame is held by a frame made of iron and refractory material, and the `` Fireproof and Fireproof Performance Test / Evaluation Work Method '' established by a performance evaluation organization approved by the Minister of Land, Infrastructure, Transport and Tourism A 20-minute fire prevention test (heating test) was performed in accordance with the “flame-shielding / quasi-flame-proofing performance test / evaluation method” defined in 1. The heating surface was the meshed glass or heat-resistant tempered glass side.

  Table 1 below shows the specifications of the multilayer glass of Examples 1 and 2 and Comparative Examples 3, 4 and 5 as test specimens.

  A thermocouple is attached in advance to the furnace inner glass edge located at the center of either the left or right side of the test specimen, and the temperature at which the first flame is generated from the vicinity of the sealing material in the multilayer glass seal is recorded. did.

  In addition, the judgment of acceptance is that the heating curve according to ISO834 is heated for 20 minutes, and there is no flame jetting for more than 10 seconds to the non-heated surface, and the flame that continues for more than 10 seconds on the non-heated surface side No damage, damage such as cracks through which the flame passes, and no gaps.

  According to the results of the full-scale test shown in Table 1, in Example Product 1, the application amount of the butyl-based sealing material as the primary sealing material is 2.7 g (2.7 g / m) per 1 m of the spacer length. Since the butyl sealant contains a flame retardant, the test result was acceptable. Further, the coating amount does not impair the durability of the multilayer glass.

  According to Example Product 2, the coating amount of the butyl sealant is 4.0 g / m which does not impair the durability of the double-glazed glass, and the butyl sealant is blended with a flame retardant. Was a pass.

  According to Comparative Example Product 1, since the coating amount of the butyl sealant exceeded 7.0 g / m, even the butyl sealant blended with the flame retardant failed the test result.

  According to Comparative Examples 2 and 3, the coating amount of the butyl-based sealing material is 4.0 (Comparative Example 2) and 2-2.5 (Comparative Example 3) g / Although it was m, since the flame retardant was not mix | blended, the test result was disqualified.

  Therefore, in the case of a butyl-based sealing material containing a flame retardant, by setting the lower limit value of the coating amount to 2 g / m or more that does not impair the durability of the multilayer glass, the temperature until the flame is reached is set. Have been confirmed to pass the test. Further, even with a butyl sealant containing a flame retardant, if the coating amount is 7 g / m or more, it may cause a flame in a relatively short time due to the excessive coating amount of the butyl sealant. confirmed.

  The fireproof double-glazed glass of Example products 1 and 2 is obtained by adding a flame retardant to the butyl sealant and setting the coating amount of the butyl sealant to 2.7 g / m and 4.0 g / m. Passed the fire test. That is, it is possible to produce a fire-resistant double glazing product that satisfies the standards by simply applying a butyl-based sealing material containing a flame retardant to the side surface of the spacer with a prescribed amount. That is, the fireproof double-glazed glass can be produced with equipment for producing a normal double-glazed glass having a sealed double-layer structure composed of a butyl-based sealing material (primary sealing material) and a secondary sealing material.

  Thereby, according to the fireproof multilayer glass of embodiment, it can manufacture easily compared with the fireproof multilayer glass of the seal | sticker three-layer structure disclosed by patent document 2,3. Moreover, since the butyl-type sealing material which mix | blended the flame retardant is arrange | positioned in the same position as the structure of the conventional multilayer glass, there is no change in design property.

  Further, the coating amount of the butyl sealant is preferably 2 g or more and 5.5 g or less, preferably 2 g or more and 4 g or less, and more preferably 2 g or more and 3.5 g or less per 1 m of the spacer length. It is preferable that it is 2 g or more and 2.7 g or less.

  By defining the coating amount of the butyl sealant as described above, according to the fireproof double-glazed glass of the present invention, durability is improved and fireproof and flameproof performance is further improved.

  Note that, as described above, the fireproof double-glazed glass is constituted by using one glass plate as a heat-resistant fireproof glass plate among at least two glass plates constituting the fireproof double-glazed glass. That is, all the glass plates constituting the fireproof multilayer glass may be heat-resistant and fireproof glass plates, but the gist of the present invention is a butyl system in which a flame retardant is blended as a primary sealing material applied to the side surface of the spacer. The sealing material is used, and the amount of the butyl sealing material applied to the spacer is defined as 2 to 7 g per 1 m of the spacer length. Therefore, this invention does not add limitation to the glass plate structure of fire prevention multilayer glass. In other words, the present invention is particularly effective for a fireproof double-glazed glass that combines a non-heatproof fireproof glass that is damaged by heating with a flame and a heat-resistant fireproof glass plate, but all the glass plates constituting the fireproof double-glazed glass. It is also effective in fireproof double-glazed glass with heat resistant and fireproof glass plates.

  As mentioned above, although embodiment thru | or example of this invention has been explained in full detail with drawing, this invention is not limited to the said embodiment thru | or example, Various in the range which does not deviate from the summary of this invention. Design changes can be made. For example, as a glass plate 14 constituting the fireproof multilayer glass 10, in addition to using a normal float glass plate, tempered glass, laminated glass, heat ray absorbing glass, and further, heat ray reflecting glass, low reflectance glass, etc. It is a glass plate with a thin coating of metal or other inorganic material on the surface, and is not particularly limited. Further, the fireproof double-glazed glass 10 may be constituted by replacing the hollow layer 20 with a heat insulating gas such as argon or krypton, or composed of three or more glass plates 14. The same applies to other configurations.

  DESCRIPTION OF SYMBOLS 10 ... Fireproof double glazing, 12 ... Glass plate (netted glass plate), 14 ... Glass plate (soda lime glass), 16 ... Spacer, 16A, 16B ... Side surface of spacer, 18A, 18B ... Primary sealing material, 20 ... Hollow layer, 22 ... secondary sealing material, 24 ... hollow part, 26 ... desiccant, 28 ... through hole, 30 ... simple test device, 32 ... ceramic hot plate, 34 ... heating surface, 36 ... sample, 38 ... iron plate, 40 ... Fireproof board, 42 ... Fireproof board, 44 ... Slit, 46 ... Burner, 48 ... Switch, 50 ... Display, 52 ... Fire

Claims (5)

At least two glass plates facing each other are separated by a spacer, and each side surface of the spacer facing the two glass plates is bonded to the two glass plates by a primary sealing material, respectively. A fireproof multilayer in which a hollow layer is formed between plates, and the outer side of the primary sealing material is sealed with a secondary sealing material, and at least one glass plate is constituted by a heat and fireproof glass plate In glass,
The primary sealing material is a butyl-based sealing material containing a flame retardant, and each side surface of the spacer is provided with the butyl-based sealing material of 2 g or more and less than 7 g per 1 m of the spacer. Fireproof double glazing.   2. The fireproof multilayer glass according to claim 1, wherein each side surface of the spacer is provided with 2 g to 5.5 g of the butyl-based sealing material per 1 m of the length of the spacer.   2. The fireproof double glazing according to claim 1, wherein each side surface of the spacer is provided with 2 g or more and 4 g or less of the butyl-based sealing material per 1 m of the length of the spacer.   2. The fireproof double glazing according to claim 1, wherein each side surface of the spacer is provided with 2 g to 3.5 g of the butyl sealant per 1 m of the length of the spacer.   2. The fireproof multilayer glass according to claim 1, wherein each side surface of the spacer is provided with 2 g or more and 2.7 g or less of the butyl-based sealing material per 1 m of the length of the spacer.

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