JP2010138026A - Multiple glass - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thin multiple glass which has thermal transmittance of ≤3.01 W/m<SP>2</SP>×K, passes the sound insulation class T-3 when being made into a sash, and has excellent heat insulation performance and sound insulation performance. <P>SOLUTION: A pair of glass plates G2, G3 composing the multiple glass are composed of a single plate glass G1 and a laminated glass G having a resin interlayer 1. The laminated glass G is thinner than the single plate glass G1 and is obtained by sealing the air into a hollow layer 2. The thickness of the single plate glass G1 is 7.4 to 10.6 mm, the thickness of the glass part obtained by laminating the pair of glass plates G2, G3 forming the laminated glass G is 5.4 to 7.6 mm, the thickness of the resin interlayer 1 is 0.3 to 0.8 mm, the thickness of the hollow layer 2 is 9.0 to 12.0 mm, and the thickness of the multiple glass obtained by laminating them is 22.1 to 31.0 mm. The multiple glass has thermal transmittance of ≤3.01 W/m<SP>2</SP>×K, and passes the sound insulation class T-3 when being made into a sash according to JIS A4706:2000. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a multilayer glass having both heat insulation performance and sound insulation performance. In particular, the present invention is a thin multi-layer glass having both excellent heat insulation performance and sound insulation performance that can be mounted on a standard sash frame having a thickness of 100 mm, commonly known as an apparent 100 mm standard sash frame, used in ordinary houses. About.

  Usually, a double-glazed glass is formed by attaching an aluminum spacer with a butyl rubber adhesive to the peripheral edge of a pair of glass plates, and bonding and integrating the pair of glass plates and the aluminum spacer with a butyl rubber adhesive. A U-shaped recess made of an aluminum spacer is filled with a sealing material made of polysulfide or silicone and sealed. Therefore, the double-glazed glass has a sealed hollow layer surrounded by a glass plate and an aluminum spacer.

  Now, the double-glazed glass has a heat insulation performance due to the presence of a hollow layer, and has advantages such as prevention of dew condensation and reduction of the load on the indoor side air conditioning. The glass sash has been widely used mainly for ordinary houses. A glass sash is a glass plate that includes double-glazed glass, laminated glass, laminated double-glazed glass, etc., and a frame is prepared and adjusted in advance, and it is attached to doors such as fixed windows, movable windows, and open / close doors. At that time, it can be handled as a single component.

In general houses, especially apartment buildings, office buildings, etc., room temperature adjustments that can be used comfortably in hot summers and cold winters are actively performed, while energy conservation and efficiency improvement of temperature adjustments are required. It has become. Further, it has been required for windows to block the temperature fluctuation of the outside air by enhancing the heat insulation performance. The necessary heat insulation performance of the glass for energy saving is “suitable for window glass in each region in Japan” according to “Design and Construction Guidelines for Rational Use of Energy Related to Housing H11.3030 Revised Ministry of Construction Notification No. 998” The heat transfer rate is described. That is, heat transmission coefficient of the window glass as fittings in cold climates around Hokkaido (1, 2 area) is, 2.08W / m 2 · ^K or less ,, i.e., 2.08W · ^{m -2} · K ^{- 1} or less, Tohoku, Nagano, etc. The heat transmissivity of window glass required in cold districts (3 districts) mainly in Honshu is 3.01 W / m ² · K or less, Tokyo, Nagoya, Osaka, Fukuoka, etc., Honshu The heat transmissivity of the window glass required in the district from the middle to the south (4.5 district) is 4.00 W / m ² · K or less. In addition, about the calculation method of the heat insulation performance of glass, it is described in "The calculation method of the thermal resistance of plate glass, and the heat transmissivity in a building" JIS R3107: 1998.

  Also, in recent years, in ordinary houses, especially apartment houses, near roads, along railway lines and airports, buildings, audio rooms, piano rooms, libraries, museums, etc. There is a growing interest in noise, which is a sound that impedes transmission, and sound absorbing materials are embedded in the floor, walls, ceilings, and the like of buildings, and soundproofing or soundproofing doors are also used for doors. In addition, even a window through which sound easily passes is required to have sound insulation performance as well as heat insulation performance. Therefore, the window has been required to attenuate sound, which is a longitudinal wave transmitted as a dense wave of a medium such as air.

  Double-layer glass is excellent in heat insulation performance, but its sound insulation performance is low compared to a glass plate of the same thickness including a hollow layer. This is because sound with higher density is more likely to absorb and attenuate sound, and is less susceptible to vibration due to solid resistance, so that glass absorbs and absorbs sound more than air, which is a gas and molecules easily move.

  In addition, since the double-glazed glass has a structure of glass plate / hollow layer / glass plate, there are many sound reflection surfaces, but there are problems of resonance transmission and coincidence effect in the hollow layer. Compared to glass plates of the same thickness excluding, there are frequency ranges that are superior in sound insulation, but there are also inferior frequency ranges.

  Resonance transmission means that when a hollow layer is as narrow as 6 mm or 12 mm as in a double-glazed glass, two plate glasses resonate through the hollow layer, and the sound insulation performance decreases near a certain frequency.

  The coincidence effect is a phenomenon in which transmission loss decreases at a specific frequency in a plate-like material, in other words, sound insulation performance decreases. Specifically, when sound is incident obliquely on the plate surface, there is a phase difference in the sound pressure depending on the position on the plate surface, so that inherent bending forced vibration occurs along the plate surface, and sound is transmitted at a certain frequency. This is a phenomenon in which the sound insulation performance deteriorates due to an increase in the noise.

  In a glass plate, when a sound wave, which is a longitudinal elastic wave, is incident on the glass surface obliquely rather than perpendicularly, a transverse vibration wave such as a wave running on the water surface is generated due to the coincidence effect, and resonance occurs. The sound insulation performance is lowered, and the sound insulation performance is lowered in the frequency range above the coincidence limit frequency. The lowest frequency at which the phenomenon of coincidence occurs is called the coincidence limit frequency, and there is a correlation between the coincidence limit frequency and the thickness of the glass plate. It is known to be. In the sound insulation of the sash, the occurrence of this coincidence effect must be suppressed.

  The coincidence limit frequency is expressed by the equation (1).

  Laminated glass has reflection at the interface between the glass plate and the resin intermediate layer, suppression of the coincidence effect by the resin intermediate layer directly bonded to the glass plate, absorption and attenuation of sound, which is a dense wave due to the viscous resistance of the resin intermediate layer, and sound insulation Designs to improve performance are possible.

  In view of this, a sound insulating interlayer for improving sound insulation performance by laminating transparent resins having different physical properties such as viscosity by changing the chemical composition has been developed. Like conventional polyvinyl butyral (hereinafter abbreviated as PVB) and ethylene-vinyl acetate copolymer (hereinafter abbreviated as EVA), they are sandwiched between glass plates, heated and melted to bond and integrate the glass plates. Glass.

  Such a sound insulating interlayer is, for example, laminated with PVB having a different monomer composition ratio or molecular weight as a transparent resin having a different chemical composition and different physical properties such as viscosity, or PVB has a chemical structure. A sound-insulating intermediate film is disclosed in which transparent resins having different physical properties such as viscosity are laminated by laminating different polyvinyl acetal resins.

  Patent Document 1 discloses that an acetal group having 4 to 6 carbon atoms and an average amount of ethylene groups to which an acetyl group is bonded has a mole fraction of 8 to 30 with respect to the total amount of ethylene groups in the main chain. At least one layer (A) comprising a polyvinyl acetal resin (A) and a plasticizer that are mol%, an acetal group having 3 to 4 carbon atoms, and an ethylene group amount to which an acetyl group is bonded. Laminated glass formed by laminating at least one layer (B) composed of a polyvinyl acetal resin (B) whose average value is 4 mol% or less with respect to the total ethylene group content of the main chain and a plasticizer. An intermediate film for use is disclosed.

  Patent Document 2 discloses that a layer (A) having a thickness of 0.05 mm or more composed of a polyvinyl acetal resin and a plasticizer and a layer (B) composed of a polyvinyl acetal resin and a plasticizer are layer (B) / layer (A ) / Layer (B), and the polyvinyl acetal resin of layer (A) is composed of polyvinyl alcohol having an aldehyde (a) having 6 to 8 carbon atoms and an aldehyde (b) having 2 to 4 carbon atoms. An acetalized resin, wherein the weight ratio of the portion acetalized with aldehyde (a) and the portion acetalized with aldehyde (b) is in the range of 60:40 to 100: 0, B) is a resin obtained by coacetalizing polyvinyl alcohol with an aldehyde (b) having 2 to 4 carbon atoms and an aldehyde (a) having 6 to 8 carbon atoms. The weight ratio of the portion acetalized with hydride (b) and the portion acetalized with aldehyde (a) is in the range of 80:20 to 100: 0, and at least of layer (A) and layer (B) One polyvinyl acetal resin is a coacetalized resin, and a sound insulating interlayer is disclosed.

  In addition, the standard of the sound insulation performance of a sash is described in "Sash" JIS A4706: 2000. That is, in JIS A4706: 2000, the sound insulation of the sash is divided into sound insulation grades T-1, T-2, T-3, and T-4. Sound is transmitted from one side of the sash, and the sound transmission loss of the sash is measured at each frequency defined in the JIS standard by measuring the reflection of sound by the sash and the decrease in sound pressure level due to absorption attenuation on the opposite side. In accordance with the -1 grade line, the T-2 grade line, the T-3 grade line, and the T-4 grade line, the sashes that meet the conditions described in the above JIS, that is, passed the sound insulation grade T-1 grade, respectively. , T-2 grade, T-3 grade, T-4 grade.

  FIG. 1 shows a graph of a sound insulation grade line described in JIS A4706: 2000.

  As multi-layer glass having heat insulation performance and sound insulation performance, Patent Document 3 discloses a multi-layer glass composed of three glass plates stacked with a predetermined interval through a spacer, and having a hollow layer between the glass plates. 1, at least one of the glass plates is Low-E glass having a surface coated with a low-radiation film that suppresses heat transfer, and each of the hollow layers is filled with an inert gas, The thickness of each is different, and at least one of them is made of laminated glass, and the sound insulation performance in a wide sound range can clear T-3 (35 grade) of JIS A 4706: 2000, and is suitable as a general residential outer wall A double-glazed glass excellent in heat insulation is also disclosed.

The multilayer glass described in Patent Document 3 uses Low-E glass in which at least one glass plate is coated with a low-radiation film that suppresses heat transfer on the surface, and each of the hollow layers has an inert gas, In the examples, argon and krypton are enclosed, and as an effect, it passes the sound insulation grade T-3 grade, and the thermal conductivity is 0.65 W / m ² · K or more and 1.11 W / m ² · K or less. It has become. However, using Low-E glass and further enclosing argon and krypton in each hollow layer is troublesome and expensive. Moreover, since argon, krypton, and xenon are heavy gases, when sealed in the hollow layer, the heat insulation performance is improved, but the sound insulation performance is not improved.

In the multilayer glass in which helium is sealed, it is possible to pass the T-3 grade with a total thickness of 18 mm or more and 24 mm or less including the two glass plates and the hollow layer. However, when helium, which is easy to transfer heat, is sealed in the hollow layer, the heat transmissivity of the window glass increases to around 4.60 W / m ² · K, which is the center of the market in Tokyo, Nagoya, Osaka, Fukuoka, etc. The heat transmissivity of the window glass required in the district from the middle to the south (4.5 district) is less than 4.00 W / m ² · K.
JP-A-6-926 JP-A-5-104687 JP 2005-60141 A

The present invention has a thermal conductivity of 3.01 W / m ² · K or less corresponding to three cold districts mainly in Honshu, such as Tohoku and Nagano, and passes the sound insulation grade T-3, An object of the present invention is to provide a thin multi-layer glass excellent in sound insulation performance.

  In addition, the present invention provides a multi-layer glass that does not easily open a through-hole and has excellent crime prevention properties against breakage of a sharp metal, for example, a metal screwdriver or the like, or breakage of the glass with a bar or the like. The purpose is to do.

  The double glazing of the present invention is made of a laminated glass in which a pair of glass plates constituting the double glazing has a single glazing and a resin intermediate layer. In addition, in this invention, a single plate glass refers to the one glass plate comprised only with glass. Multi-layer glass and laminated glass are not single glass because they are composed of a plurality of glass plates. Laminated glass is obtained by sandwiching a resin intermediate film selected from PVB, EVA or transparent resin between a pair of glass plates, and bonding and integrating them by heating and melting the resin intermediate film. Point to.

  The reason for using laminated glass for the sound insulating double-layer glass of the present invention is that, in laminated glass, a pair of glass plates constituting the laminated glass vibrate irregularly due to the viscous and flexible resin intermediate layer, and the same thickness. The transmission loss at the coincidence limit frequency is larger than that of the single plate glass, and the position of the coincidence limit frequency is moved to the higher frequency side, thereby insulating the frequency range from 1000 Hz to 4000 Hz.

  Further, as a result of intensive studies by the present inventors, in the double-layer glass having the above-described configuration, when the laminated glass is made thinner than the single plate glass, the laminated glass is further 1000 Hz or more and 4000 Hz, compared to a configuration in which the laminated glass is thicker than the single plate glass. It was found that the sound transmission loss is reduced in the following frequency range and the drop in the sound insulation performance curve is reduced. Moreover, the heat insulation performance was improved by making the gas enclosed with the hollow layer of a multilayer glass into air. Compared to sealing an inert gas such as helium, neon, argon or krypton, it is less time-consuming and economical.

  The present inventors examined the thickness of each glass plate, the thickness of the hollow layer, etc. in the above sound insulating double-glazed glass in which the laminated glass is thinner than the single plate glass and air is enclosed in the hollow layer. A thin multilayer glass with excellent performance was obtained.

Specifically, the thickness of the double-glazed glass is 31.0 mm or less, and it has excellent heat insulation performance, and has a heat transmissivity of 3.01 W / m ² · corresponding to three cold districts mainly in Honshu, such as Tohoku and Nagano. K or less, excellent sound insulation, passed sound insulation class T-3 conforming to JIS A4706: 2000, and obstructs the communication of intention by voice according to the loudness curve, especially considering the frequency characteristics of human ear The inventors have invented a thin multilayer glass having a large sound transmission loss in a frequency range of 1000 Hz to 4000 Hz.

  In the multilayer glass of the present invention, the laminated glass needs to use a glass plate having a thickness of 2.7 mm or more for each glass plate constituting the laminated glass in consideration of the strength of the laminated glass. Therefore, the thickness of the glass part which combined a pair of glass plate which comprises a laminated glass is 5.4 mm or more. Moreover, in the multilayer glass of this invention, when the thickness of the glass part of a laminated glass is thinner than 5.4 mm, it is difficult to pass the sound insulation grade T-3 grade.

  Further, the thickness of the single glass in the double-glazed glass of the present invention is the nominal thickness in the laminated glass having the configuration of glass plate (FL3) having a nominal thickness of 3 mm / intermediate resin layer / glass plate having a nominal thickness of 3 mm (FL3) Therefore, the thickness of the glass plate needs to be thicker than the total lower limit of the nominal thickness of the FL3 glass plate 5.4 mm + the resin intermediate layer. Therefore, a glass plate having a measured thickness value of 7.4 mm or more, preferably a measured thickness value of 8.4 mm or more is used as the single plate glass. If the thickness is thinner than 7.4 mm, it is difficult to pass the sound insulation class T-3.

  The abbreviation FL stands for float glass which is continuously produced by melting and developing a glass raw material on a tin bath. The numerical value after the abbreviation is the nominal thickness, and the unit is mm. The nominal thickness is the tolerance shown in Table 1 according to JIS R3202: 1996.

  In the sound insulating double-glazed glass of the present invention, air is sealed in the hollow layer in order to achieve both excellent heat insulating performance and sound insulating performance. Air is enclosed at atmospheric pressure. The standard atmospheric pressure is 101325 Pa.

Moreover, in the double-glazed glass of the present invention, when the heat transmissibility corresponding to three cold districts centering on Honshu, such as Tohoku and Nagano, is 3.01 W / m ² · K or less and the sash is used. In order to pass the sound insulation class T-3 according to JIS A4706: 2000, the thickness of the hollow layer in which the air is enclosed needs to be 9.0 mm or more. In order to achieve the T-3 grade, at least the resin intermediate layer needs to have a thickness of 0.3 mm or more, preferably 0.38 mm or more.

Moreover, in the multilayer glass of this invention, in order to make the total thickness of a multilayer glass 31.0 mm or less, the thickness of the single plate glass which comprises a multilayer glass is 10.6 mm or less, of the glass part of a laminated glass The thickness is 7.6 mm or less, the thickness of the resin intermediate layer is 0.8 mm or less, preferably 0.76 mm or less, and the thickness of the hollow layer enclosing air is 11.0 mm or less. In addition, when the total thickness of the multi-layer glass is 30.0 mm or less, the thermal conductivity is 3.01 W / m ² · K or less, and the sash is used, the sound insulation grade T-compliant with JIS A4706: 2000 The reason why the sound transmission loss in the frequency range of 1000 Hz or more and 5000 Hz or less is large is that the laminated glass is thinner than the single plate glass.

That is, according to the present invention, a pair of glass plates constituting a multi-layer glass is composed of a single plate glass and a laminated glass having a resin intermediate layer, the laminated glass is thinner than the single plate glass, air is enclosed in the hollow layer, The thickness is 7.4 mm or more and 10.6 mm or less, and the laminated glass is composed of a pair of glass plates, and the thickness of the glass portion including the pair of glass plates constituting the laminated glass is 5.4 mm or more and 7.6 mm or less, The thickness of the resin intermediate layer is 0.3 mm or more and 0.8 mm or less, the thickness of the hollow layer is 9.0 mm or more and 12.0 mm or less, and the thickness of the multilayer glass combining these is 22.1 mm or more It is 31.0 mm or less, and it achieves a thermal conductivity of 3.01 W / m ² · K or less, and when it is made a sash, it is a multi-layer glass that passes the sound insulation class T-3 according to JIS A4706: 2000. is there.

  Moreover, since the thickness of the resin intermediate layer is set to 0.7 mm or more and the commercially available PVB having a thickness of 30 mil (0.76 mm) is used, the PVB has viscoelasticity and is strong, so that it is not easily broken. Thus, the suspicious person is prevented from entering through the sash window using the present double-glazed glass from the outside of the building.

  That is, this invention is said multilayer glass characterized by the thickness of the resin intermediate | middle layer being 0.7 mm or more.

  In addition, although the resin intermediate film which consists only of PVB or only EVA may be used for a resin intermediate layer, PVB which changed chemical structure, changed density and viscoelasticity rather than using PVB or EVA as a single layer, Sound insulation performance is improved by using a sound insulation intermediate film formed by laminating EVA or other transparent resin.

  That is, the present invention is the above-mentioned sound insulating multilayer glass, wherein the resin intermediate layer is derived from a resin intermediate film selected from PVB, EVA or a sound insulating intermediate film formed by laminating a transparent resin. .

Further, by using Low-E glass having a low emission film formed by laminating a metal film such as a metal oxide thin film and silver on a glass substrate forming a multi-layer glass, the double-layer glass of the present invention is used. The heat insulating performance of the layer glass is further improved. Low-E glass is preferably used with a low emission film provided on the inner surface of the multilayer glass of the present invention. By disposing the Low-E film, it becomes possible to achieve a thermal conductivity of 2.08 W / m ² · K or less of the window glass centering on Hokkaido (1.2 district).

  In the multi-layer glass of the present invention, it is preferable that Low-E glass is disposed and used so that the low radiation film is on the inner surface, that is, the hollow layer side so that the low radiation film is not damaged.

  That is, the present invention is the above-mentioned multilayer glass, wherein Low-E glass having a low radiation film formed on one side is used and the low radiation film is disposed on the hollow layer side.

  Moreover, this invention is a sash window characterized by attaching said multilayer glass.

  Moreover, this invention is a door characterized by attaching said multilayer glass.

  In the double glazing of the present invention, the laminated glass is used for one of the pair of glass plates constituting the double glazing, and the laminated glass is made thinner than the single glazing, whereby the coincidence effect is suppressed, and is 1000 Hz or more and 5000 Hz or less. Sound transmission loss in the frequency range has increased and sound insulation performance has been improved.

Moreover, in the double-glazed glass of the present invention, by enclosing air in the hollow layer, a heat transmissivity corresponding to three cold districts centering on Honshu, such as Tohoku and Nagano, is 3.01 W / m ² · K or less. A lightweight and thin multilayer glass excellent in sound insulation performance and heat insulation performance with a thickness of 22.1 mm or more and 31.0 mm or less that can be achieved was obtained. In the multilayer glass of 22.1 mm or more and 31.0 mm or less, the multilayer glass of 25.0 mm or less is a standard sash frame having a thickness of 100 mm, commonly referred to as an apparent 100 mm standard sash frame used in ordinary houses. It can be mounted on.

  Further, in the double-layer glass of the present invention, by setting the thickness of the resin intermediate layer to 0.70 mm or more, it is possible to break the glass with a sharp metal, for example, a metal screwdriver or the like, and crush the glass with a bar or the like. As a result, the through hole was not easily opened and excellent crime prevention was obtained.

Moreover, in the double-layer glass of the present invention, by using Low-E glass, it has a heat insulating property corresponding to 3.01 W / m ² · K corresponding to the next generation energy saving standard 2 district, and when it is made into a sash, it is JIS. A lightweight and thin glass sash that passed the sound insulation class T-3 according to A4706: 2000 was obtained.

  FIG. 2 shows an example of a cross-sectional view of the main part of a multi-layer glass using single glass and laminated glass.

  As shown in FIG. 2, in the double-glazed glass of the present invention, a pair of glass plates constituting the double-glazed glass is composed of a single plate glass G1 and a laminated glass G having a resin intermediate layer 1, and the laminated glass G is a single plate glass G1. It is a multi-layer glass that is thinner and is formed by enclosing air in the hollow layer 2.

In the double-glazed glass of the present invention, a pair of glass plates constituting the double-glazed glass is composed of a single glass plate G1 and a laminated glass G having a resin intermediate layer 1, and the laminated glass G is thinner than the single glass plate G1. G1 has a thickness of 7.4 mm or more, preferably 8.4 mm or more and 10.6 mm or less. Laminated glass G is composed of a pair of glass plates G2 and G3, and a pair of glass plates G2 and G3 constituting laminated glass G are The combined glass portion has a thickness of 5.4 mm or more and 7.6 mm or less, the resin intermediate layer 1 has a thickness of 0.3 mm or more and 0.8 mm or less, and the hollow layer 2 has a thickness of 9.0 mm or more, 12. 0 mm or less, preferably 11.0 mm or less, and the thickness of the multilayer glass combining these is 22.1 mm or more, 31.0 mm or less, preferably 23.1 mm or more, 30.0 mm or less, Mashiku is less than 25.0 mm, made by sealing air in the hollow layer 2, the heat transmission coefficient is not more than ^{3.01W / m 2 · K, JIS} A4706 to and upon the sash: conforms to 2000 It is said multilayer glass which passes sound insulation grade T-3 grade.

  As shown in FIG. 2, the sound insulating and heat insulating double-glazed glass of the present invention comprises a single glass sheet G1 and a laminated glass G. For example, a spacer 4 made of aluminum or stainless steel having a hollow portion filled with zeolite or the like as the desiccant 3 is sandwiched between the single glass G1 and the laminated glass G, and the butyl rubber adhesive 5 is placed on both sides of the spacer 4. The single glass sheet G1 and the laminated glass G are bonded and integrated with the butyl rubber adhesive 5 via the spacer 4 and the hollow glass layer 2 is sealed with the single glass sheet G1 and the laminated glass G spaced apart. The recess 6 surrounded by the single glass G1 and the laminated glass G and the spacer 4 is filled with a silicone sealant or a polysulfide sealant to improve water tightness so that moisture does not enter. In the sound insulating double-glazed glass of the present invention, in order to prevent the helium enclosed in the hollow layer 2 from escaping, it is preferable to fill with a polysulfide sealant that is hard to permeate helium and has higher sealing performance against helium. Moreover, it is good also as a double structure of a polysulfide sealant and a silicone sealant. The helium is most difficult to permeate when the recess 6 is filled with hot melt butyl. At this time, in order to prevent helium leakage from the edge of the multilayer glass, it is preferable that the depth of the recess 6 is 5 mm or more, and the thickness of the spacer 4 and the sealant layer is 10 mm or more.

  Further, depending on the situation, a resin or a metal is used to apply and adhere a sealant to the laminated glass end 6 so that the PVB film, the EVA film, or the sound insulating intermediate film as the resin intermediate layer 1 of the laminated glass is not devitrified. You may stick a board.

  In the sound insulating double-glazed glass of the present invention, the laminated glass G having the single glass G1 and the resin intermediate layer 1 is used for the pair of glass plates constituting the double-glazed glass for the following reason.

  In building materials, sound insulation performance is affected by mass (mass law) and bending stiffness (coincidence). In order not to reduce the transmission loss due to the coincidence effect, it is preferable to reduce the bending rigidity so that the coincidence limit frequency is as high as possible.

  As shown in FIG. 2, in the sound insulating multilayer glass of the present invention, a pair of glass plates constituting the multilayer glass is composed of a laminated glass G having a single sheet glass G 1 and a resin intermediate layer 1. In the laminated glass G, the pair of glass plates G2 and G3 constituting the laminated glass G oscillates irregularly by the viscous and flexible resin intermediate layer 1, and at a coincidence limit frequency compared to the single plate glass G1 having the same thickness. The transmission loss is large, and the position of the coincidence limit frequency moves to the higher frequency side, so that the frequency range of 1000 Hz to 4000 Hz is sound-insulated.

  FIG. 3 is a graph of the sound insulation performance curve of the single glass and the laminated glass.

  As shown in FIG. 3, with respect to a single plate glass (FL8) having a measured thickness value of 7.4 mm, a pair of measured thickness values of 3.7 mm is applied to a glass plate (FL4) having a thickness of 30 mil (0). .76 mm) laminated glass sandwiched with PVB (FL4 / PVB30 mil / FL4) has a lower drop in the frequency range of the sound insulation performance curve of 1000 Hz or more and 4000 Hz or less and is excellent in sound insulation.

  The superior sound insulation performance of laminated glass is due to the absorption of sound vibration energy in addition to the vibration of the pair of glass plates that make up the laminated glass individually and irregularly due to the action of the viscous and flexible resin intermediate layer. .

  In particular, a sound insulating interlayer in which transparent resins having different viscosities are laminated is excellent in performance of absorbing sound vibration energy.

  Laminated glass G (FL4 / sound insulation PVB 15 mil / FL4) using a sound insulation interlayer (resin acoustic film made by Sekisui Chemical Co., Ltd.) having a thickness of 15 mil (0.38 mm) as the resin intermediate layer 1 is Compared to the laminated glass G using PVB or EVA for the resin intermediate layer 1, the drop in the frequency range of 1000 Hz to 4000 Hz is further small and the sound insulation is excellent.

  SREC Acoustic Film is a sound insulating interlayer made by laminating transparent resin. It has a sandwich structure in which a sound insulating transparent resin layer is sandwiched between PVB and the core layer is sandwiched between three layers. It is made by molding. In the case where the laminated glass G has a sound transmission loss of about 5 dB in the frequency range of 1000 Hz or more and 4000 Hz or less by using an ESREC acoustic film for the resin intermediate layer instead of the normal PVB, and the multilayer glass G is used. The sound insulation performance is further improved.

  If the sound absorption and reflection in the hollow layer 2 are not taken into consideration, the sound insulation performance on the lower frequency side than the coincidence limit frequency, which is not affected by the coincidence effect, in the multilayer glass is in accordance with the mass law. It is determined by the total thickness of the plate glass G1 and the glass plates G2 and G3. That is, in the double glazing shown in FIG. 1, the total thickness of the single glass glazing G1 and the glass glazings G2 and G3 constituting the double glazing is the sound insulation performance on the lower frequency side than the coincidence limit frequency that is not affected by the coincidence area. Determined.

  In the double glazing shown in FIG. 2, the coincidence limit frequency of the single glazing G1 and the glazings G2 and G3 constituting the double glazing is set on the high frequency side, and the thicknesses of the single glazing G1 and the glass glazings G2 and G3 are greatly changed. Thus, if the coincidence limit frequency is set to a significantly different frequency, it is possible to eliminate a decrease in sound insulation performance due to the coincidence effect. That is, in the double-layer glass, if the single glass sheet G1 and the laminated glass G are used and the coincidence limit frequencies of the single glass sheet G1, glass sheets G2 and G3 constituting the double-layer glass are divided into different frequencies, the sound insulation performance curve due to the coincidence effect is obtained. Can be eliminated and the sound insulation performance is improved.

  For example, the laminated glass G to be formed is a multi-layer glass thinner than the single plate glass G1, a float glass G1 (FL10) having a nominal thickness of 10 mm / a hollow layer 2 (G6) having a thickness of 6.0 mm / a float glass G2 having a nominal thickness of 3 mm. (FL3) / PVB 30 mil (0.76 mm) as resin interlayer 2 / float glass G3 (FL3) having a nominal thickness of 3 mm, ie, FL10 / G6 / FL3 / sound insulation PVB 30 mil / FL3 Multi-layer glass having a total thickness of 14.6 mm to 17.4 mm in consideration of the difference has a coincidence limit frequency of FL10 and a coincidence limit frequency of FL3, and a single glass plate G1 (FL10) and laminated glass are used. Due to the difference in coincidence critical frequencies of the glass plates G2 and G3 (FL3) constituting the multi-layer glass It is possible to reduce the drop in sound insulation performance due to coincidence limit frequency upon the. In this way, the thickness of the glass sheets G2 and G3 in the laminated glass and the single glass sheet G1 constituting the multi-layer glass is greatly different, and it is not more than 1000 Hz to prevent the sound insulation performance curve from dropping due to the coincidence effect. This is important in reducing or eliminating the drop in the sound insulation performance curve in the frequency range of 4000 Hz or less.

  In contrast, when the thin side is made of single plate glass and the thick side is laminated glass (example: FL5 / sound insulation PVB30 mil / FL5 / G6 / FL6), that is, float glass (FL5) with a nominal thickness of 5 mm / thickness 6 A multi-layer glass composed of 0.0 mm hollow layer (G6) / nominal thickness of 3 mm float glass (FL3) / PVB30 mil (0.76 mm) / nominal thickness of 3 mm float glass (FL3) is composed of FL5 plate glass and FL6 The plate glass has a near coincidence limit frequency, and the drop in soundproof performance due to the coincidence limit frequency cannot be reduced. This is because there is no great difference in the thickness of each of the three glass plates constituting the double-glazed glass, and the drop in the sound insulation performance curve is overlapped due to the coincidence effect.

  For the above reasons, when the laminated glass G is made thinner than the single plate glass G1, the single plate glass G1, the glass plates G2 and G3 constituting the multi-layer glass are made more than the laminated glass G thicker than the single plate glass G1. The thickness of the laminated glass G is thinner than that of the single glass sheet G1 in the sound insulating double-layer glass of the present invention because the drop in sound transmission loss is reduced in a frequency range of 1000 Hz to 4000 Hz. .

  Examples of the transparent resin used for the resin intermediate layer 1 include a sound insulating interlayer formed by laminating PVB, EVA, and a transparent resin. The glass plates G2 and G3 are directly bonded and integrated by the resin intermediate layer 1 obtained by sandwiching the resin intermediate film such as PVB, EVA, and sound insulation intermediate film between the pair of glass plates G2 and G3 and then heating and melting them. Laminated glass G. Functional fine particles may be kneaded into the resin intermediate layer 1 made of a transparent resin to improve the heat insulation performance.

  In addition, the sound insulation intermediate film formed by laminating a transparent resin includes Sekisui Chemical Co., Ltd., trade name, ESREC film, or Kuraray Co., Ltd., trade name, Torosifol, and can further improve sound insulation.

  In order to keep the thermal conductivity of the multilayer glass of the present invention low, argon (atomic weight, about 40 amu), krypton (atomic weight, about 84 amu), xenon (atomic weight, about 131 amu) or the like can be encapsulated, but these rare gases are expensive. Air (average molecular weight, 29 g / mol) can be easily obtained in order to enclose in the hollow layer 2 of the multilayer glass of the present invention, and it is preferable to use the multilayer glass of the present invention.

That is, in the above-described configuration of the double-glazed glass of the present invention, air is enclosed in the hollow layer 2 and the thickness of the hollow layer 2 is set to 9.0 mm or more and 11.0 mm or less. Calculation method of heat transmissivity in architecture ”JIS R3107: The heat transmissivity of the double-glazed glass calculated in accordance with 1998 is 3.01 W / m ² · K or less corresponding to the three areas, and“ Sash ”JIS A4706 : A double-glazed glass that passed the sound insulation class T-3 according to 2000 was obtained.

In addition, as described above, in the multilayer glass of the present invention, by using Low-E glass formed with a low radiation film on one side for the single plate glass G1, and arranging the low radiation film on the hollow layer side, The heat flow rate of the multi-layer glass of the present invention is further reduced, and the heat flow rate of the window glass as a fitting is 2.08 W / m ² · K or less in a cold district centering on Hokkaido (1 and 2 districts). It became possible.

  The double glazing is usually attached directly to a sash frame that has been pre-fabricated and adjusted for fitting directly into or into a door and window sash, or via a frame that is a mounting member such as a glazing channel, a fixed window, When mounting on windows such as movable windows and doors such as open / close doors, they are handled as a single component.

  The single plate glass G1 used for the multilayer glass of the present invention, and the glass plates G2 and G3 forming the laminated glass G are manufactured by a float method, etc., and are not subjected to any post-treatment, and after manufacturing, wind cooling strengthening Alternatively, tempered glass or the like that has been subjected to tempering treatment such as chemical strengthening may be used, and colored glass may be used.

(Evaluation of sound insulation performance)
The sound insulation performance was evaluated according to JIS A1416: 2000. Specifically, using a type I test chamber (reverberation chamber) described in JIS A1416: 2000, using two wooden ledges (25 mm x 25 mm), fixing to a test piece, installing glass, JIS The sound transmission loss was measured by the method described in A1416: 2000. The measurement value of sound transmission loss is judged according to JIS A4706: 2000, and “a) sound transmission loss at 16 points from 125 Hz to 4000 Hz all exceed the corresponding sound insulation grade line. If the sum of the values below the corresponding sound insulation grade line is 3 dB or less, the sound insulation grade is assumed. ”“ B) In all frequency bands, the sound transmission loss is converted by the formula 1, and the converted value ( 6 points) will exceed the applicable sound insulation grade line. ”On the other hand, if the sound insulation grade T-3 grade meets the criteria in either a) or b), it will pass the sound insulation grade T-3 grade. did.
Example 1
As shown in FIG. 2, a glass plate (FL10) having a measured thickness value of 9.4 mm was used as the single plate glass G1. Furthermore, the thickness which has the resin intermediate | middle layer 1 (PVB30mil) which consists of a glass plate (FL3) and PVB thickness 30mil (0.76mm) PVB with a measured value of 2.7mm in a pair of glass plate G2 and G3. A laminated glass G (structure, FL3 / PVB 30 mil / FL3) having a thickness of 6.16 mm, the thickness of the hollow layer 2 being 10.0 mm (A10), and a multilayer glass having a structure of FL10 / A10 / FL3 / PVB30 mil / FL3 Prepared. The thickness of this multilayer glass is 25.6 mm.

  An aluminum spacer 4 having a hollow portion filled with zeolite as a desiccant 3 is sandwiched between the single glass sheet G1 and the laminated glass G, and a butyl rubber adhesive 5 is adhered to both sides of the spacer 4, and the single glass sheet G1 and The laminated glass G was bonded and integrated with the butyl rubber adhesive 5 via the spacer 4, and the single glass sheet G 1 and the laminated glass G were separated. A recess 6 surrounded by the single glass G1 and the laminated glass G and the spacer 4 was filled with a polysulfide sealant. Air was enclosed in the hollow layer 2 at atmospheric pressure.

  The sound source was placed on the single glass G1 side, and the measuring instrument was placed on the laminated glass G side.

  FIG. 4 is a graph of a sound insulation performance curve of the sound insulation and heat insulating double-glazed glass of Example 1.

As a result of conducting a sound insulation performance test in accordance with JIS A 1416: 2000, the judgment standard described in JIS A4706: 2000, “a) Sound transmission loss at 16 points of 125 Hz to 4000 Hz are all higher than the corresponding sound insulation grade line. In addition, if the sum of the values below the corresponding sound insulation grade line in each frequency band is 3 dB or less, the sound insulation grade is assumed. ”“ B) In all frequency bands, sound transmission is performed according to the equation (1). The loss is converted, and the converted value (six points) exceeds the applicable sound insulation rating line. ”On the other hand, when using the sash, a) and b) are both standards. Satisfied and passed the sound insulation class T-3.
Example 2
As shown in FIG. 2, a glass plate (FL8) having an actual measurement value of 7.4 mm was used as the single plate glass G1. Furthermore, the thickness which has the resin intermediate | middle layer 1 (PVB15mil) which consists of a glass plate (FL3) whose measured value of thickness is 2.7 mm, and PVB of PVB thickness 15mil (0.38mm) in a pair of glass plate G2, G3. A laminated glass G having a thickness of 5.78 mm (configuration, FL3 / PVB15 mil / FL3), a hollow layer 2 having a thickness of 9.0 mm (A9), and a multilayer glass having a configuration of FL8 / A9 / FL3 / PVB15 mil / FL3 Prepared. The thickness of this multilayer glass is 22.18 mm.

  The air was enclosed in the hollow layer 2 at atmospheric pressure, and the end of the double-glazed glass had the same structure as in Example 1.

  FIG. 5 is a graph of the sound insulation performance curve of the multilayer glass of Example 2.

  As a result of conducting a sound insulation performance test in accordance with JIS A1416: 2000, both judgment criteria a) and b) described in JIS A4706: 2000 satisfied the sound insulation class T-3 class and passed the sound insulation class T-3 class. .

  As a result of conducting a sound insulation performance test on the sound insulation double-glazed glass in accordance with JIS A 1416: 2000, the sash satisfies the criteria of the above-mentioned JIS A4706: 2000, and the sound insulation grade. Passed T-3 grade. Moreover, the difference in the thickness of the single glass constituting the double-glazed glass and the flat glass used for the laminated glass was able to reduce the drop in soundproof performance due to the coincidence limit frequency.

Further, in the sound insulating double-layer glass of the present invention, further improvement of the sound insulating property can be expected by using a sound insulating intermediate film instead of PVB for the resin intermediate layer 1. Examples of such a sound insulating interlayer include, as described above, Sekisui Chemical Co., Ltd., trade name, ESREC Acoustic Film and Kuraray Co., Ltd., trade name, Trosifor.
(Optical / thermal performance measurement)
Next, the optical performance and thermal performance of the multi-layer glass of the present invention were measured based on “Testing method of transmittance, reflectance, emissivity, and solar radiation acquisition rate of plate glass” JIS R3106: 1998. Calculation method of heat resistance and heat transmissivity in building "Based on JIS R3107: 1998, the heat transmissivity of the double-glazed glass of Examples 1 and 2 was calculated.

The thermal conductivity of the double glazing structure of FL10 / A10 / FL3 / PVB30 mil / FL3 in Example 1 is 2.88 W / m ² K, and cold regions (3 districts) centering on Honshu, such as Tohoku and Nagano. As a result, a thermal conductivity of 3.01 W / m ² K was obtained. With the same structure, the double glass with a low-E film on the indoor side of the single glass sheet G1 has a thermal transmissivity of 1.96 W / m ² K, which is a cold region centering on Hokkaido (1.2 district). And achieved a heat flow of 2.08 W / m ² K for window glass as a fitting.

The heat transmissivity of the double-glazed glass of the structure of FL8 / A9 / FL3 / PVB15mil / FL3 of Example 2 is 2.98 W / m ² K, and cold regions (3 districts) mainly in Honshu, such as Tohoku and Nagano. As a result, a thermal conductivity of 3.01 W / m ² K was obtained. With the same structure, the double-glazed glass with a Low-E film formed on the indoor side of the single glass sheet G1 has a thermal conductivity of 2.08 W / m ² K, which is a cold district centering on Hokkaido (1 and 2 districts). The window glass as a joiner achieved a thermal conductivity of 2.08 W / m ² K.

It is a graph of the sound-insulation grade line described in JIS A4706: 2000. It is an example of sectional drawing of the principal part of the multilayer glass using a single plate glass and a laminated glass. It is a graph of the sound insulation performance curve of a single plate glass and a multilayer glass. It is a graph of the sound insulation performance curve of the multilayer glass of Example 1. It is a graph of the sound-insulation performance curve of the multilayer glass of Example 2.

Explanation of symbols

G1 Single plate glass G Laminated glass G2, G3 Glass plate 1 Resin intermediate layer 2 Hollow layer 3 Desiccant 4 Spacer 5 Butyl rubber adhesive 6 Recess 7 Laminated glass edge

Claims (6)

A pair of glass plates constituting the double-glazed glass consists of a single glass plate and a laminated glass having a resin intermediate layer, the laminated glass is thinner than the single glass plate, and encloses air in the hollow layer,
The thickness of the single plate glass is 7.4 mm or more and 10.6 mm or less, and the laminated glass is composed of a pair of glass plates, and the thickness of the glass portion formed by combining the pair of glass plates forming the laminated glass is 5.4 mm or more. 6 mm or less, the thickness of the resin intermediate layer is 0.3 mm or more and 0.8 mm or less, the thickness of the hollow layer is 9.0 mm or more and 12.0 mm or less, and the thickness of the multilayer glass combining these is 22 .1 mm or more and 31.0 mm or less,
The thermal conductivity is 3.01 W / m ² · K or less,
A multilayer glass characterized by passing a sound insulation grade T-3 according to JIS A4706: 2000 when sashed. The multilayer glass according to claim 1, wherein the thickness of the resin intermediate layer is 0.7 mm or more. The resin intermediate layer is derived from a resin intermediate film selected from a sound insulating intermediate film obtained by laminating polyvinyl butyral, ethylene-vinyl acetate copolymer or a transparent resin. The multilayer glass as described. The multilayer according to any one of claims 1 to 3, wherein Low-E glass having a low radiation film formed on one side is used, and the low radiation film is disposed on the hollow layer side. Glass. A window comprising the double-glazed glass according to any one of claims 1 to 4. A door comprising the double-glazed glass according to any one of claims 1 to 5.