JP6838736B2 - Double glazing - Google Patents

Description

The present invention relates to double glazing having excellent heat insulating properties.

Double glazing is widely used as window glass of buildings because it has excellent heat insulating properties. However, in recent years, there has been a demand for reduction of energy consumed in houses and buildings, and further improvement in heat insulating properties of window glass is required.

As a method of improving the heat insulating property of the double glazing, a method of dividing the space by arranging a plastic film in the space between the glass plates is known. However, the plastic film arranged between the glass plates was wrinkled due to shrinkage, resulting in poor appearance.

In Patent Document 1, as shown in FIG. 6, spacer members 4'and 4 "are fixed to the peripheral edges of the two glass plates 1 and 1', and the film 3 is placed between the spacer members 4'and 4 ". By arranging the glass plates 1, 1', the intermediate layer 2 divided by the film 3 is formed, and the outer peripheral side of the spacer members 4', 4'is sealed with the sealing material 8 in the double glazing. The end portion of the film 3 protruding from the spacer members 4'4 "to the outer peripheral side is included by the sealing material 8, and the two glass plates 1, 1'on the outer peripheral side of the sealing material 8 A double glazing on which a moisture-proof layer 9 to be adhered is formed is described. Patent Document 1 describes that the film 3 is heated in order to prevent the occurrence of wrinkles. Since the film 3 needs to be firmly fixed at the time of heating, it is described that polyurethane or the like, which is hard to melt, is used as the sealing material 8 for fixing the film 3. Further, it is described that the invasion of moisture in the outside air into the intermediate layer 2 is prevented by forming the moisture-proof layer 9 on the outer peripheral side of the sealing material 8. However, when a plurality of films 3 are arranged or when the films 3 are large, the films 3 may shrink and wrinkle, resulting in poor appearance, which has been a problem.

Japanese Unexamined Patent Publication No. 8-151865

The present invention has been made to solve the above problems, and an object of the present invention is to provide a double glazing having a good appearance and excellent heat insulating properties.

The above-mentioned problem is a double glazing in which a glass plate and a glass plate are arranged so as to form a space through a spacer arranged on a peripheral edge of the glass plate, and a plastic film is formed in the space. The space is divided by arranging at least one low-emission film having a Fabry-Perot interference filter formed on one side or both sides of the glass plate, and between the glass plate and the spacer, and between the low-radiation film and the spacer. Each is sealed with a primary sealing material, the space between the primary sealing material and the glass plate on the outside of the spacer is sealed with a secondary sealing material, and a reinforcing material is arranged inside the secondary sealing material. It is solved by providing a double glazing.

It is preferable that the reinforcing material has a substantially rectangular plate shape and is arranged so that the inner surface of the reinforcing material and the outer surface of the spacer face each other. It is also preferable that the width of the reinforcing material in the thickness direction of the double glazing is 0.2 mm or more narrower than the distance between the glass plates. The width of the secondary sealing material in the depth direction of the double glazing is n × 1 mm to n × 20 mm (n is the number of the low emissivity films), and the distance between the reinforcing material and the spacer is 0. It is also preferable that it is 5 mm or more.

It is preferable that the spacer has a joint portion formed by joining a plurality of members, and a reinforcing material is arranged at a position facing the joint portion. At this time, it is more preferable that the members are joined by fitting the substantially L-shaped member into the plurality of members, and the angle of the substantially L-shaped member is 60 to 120 °.

It is also preferable that the spacer has a bent portion and the bent portion is arranged at a corner portion of the double glazing.

It is preferable that the spacer has a joint portion formed by joining members whose ends are cut at an angle of θ / 2, and the joint portion is arranged at a corner portion of double glazing. However, θ indicates the angle of the corner portion, and θ is 60 to 120 °. It is also preferable that the outer surface of the spacer is covered with a reinforcing tape at the corner portion of the double glazing.

It is preferable that the glass plate is made of tempered glass. It is also preferred that the space is filled with at least one gas selected from the group consisting of air, argon, krypton and xenon. It is also preferable that the secondary sealing material has an inner layer made of polyurethane and an outer layer made of silicone, and a reinforcing material is arranged between the inner layer and the outer layer.

The double glazing of the present invention has excellent heat insulating properties because the space between the glass plates is divided by the low emissivity film. According to the present invention, the occurrence of wrinkles in the low emissivity film is suppressed, so that the double glazing has a good appearance.

It is a front schematic view of an example of the double glazing of this invention. FIG. 1 is a cross-sectional view taken along the line AA in FIG. It is a front schematic view which shows an example of the joint part formed by joining the member by fitting the substantially L-shaped member into the tubular member. It is a front view and a side view of the substantially L-shaped member in a joint shown in FIG. It is a side view of an example of the double glazing of this invention. It is sectional drawing of the double glazing described in JP-A-8-151865.

The double glazing of the present invention is a double glazing in which a glass plate and a glass plate are arranged so as to form a space through a spacer arranged on the peripheral edge of the glass plate, and the inside of the space is formed. The space is divided by arranging at least one low-emission film having a Fabry-Perot interference filter formed on one side or both sides of the plastic film, and the space is divided between the glass plate and the spacer, and the low-emission film and the spacer. The space between the glass plate and the glass plate is sealed with the primary sealing material, and the space between the primary sealing material and the glass plate on the outside of the spacer is sealed with the secondary sealing material, and the reinforcing material is inside the secondary sealing material. Is arranged.

Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 is a schematic front view of an example of the double glazing 11 of the present invention, and FIG. 2 is a sectional view taken along line AA in FIG. The double glazing 11 shown in FIGS. 1 and 2 is an example in which four low emissivity films 14 are arranged between the glass plates 12 and 13.

In the double glazing 11 of the present invention, at least one low emissivity film 14 having a Fabry Perot interference filter formed on one side or both sides of a plastic film is arranged in a space 15 between the glass plates 12 and 13. The space 15 is divided. Here, the glass plate 12, the low emissivity film 14, and the glass plate 13 are arranged in parallel. With such a configuration, the thermal transmissivity can be lowered, so that the double glazing 11 having excellent heat insulating performance can be obtained.

As shown in FIG. 2, the space 15 between the glass plate 12 and the glass plate 13 is formed via the spacer 16 arranged at the peripheral edge of the glass plate 12 and the glass plate 13. Two or more spacers 16 are arranged between the glass plates 12 and 13, and the low emissivity film 14 is arranged between the spacers 16.

Examples of the material of the spacer 16 include metal, plastic, and ceramics. The spacer 16 has high strength because it is provided to form a space 15 between the glass plate 12 and the glass plate 13 and to hold the low emissivity film 14 that divides the space 15. Is preferable. From this point of view, as the material of the spacer 16, metal and plastic are preferable, and metal is more preferable. As the metal, stainless steel, aluminum alloy and the like are preferable, and among them, stainless steel is more preferable. As the plastic, FRP (fiber reinforced plastic) such as GFRP (glass fiber reinforced plastic) and CFRP (carbon fiber fiber reinforced plastic) is preferable.

The shape of the spacer 16 is not particularly limited, but it is preferable that the spacer 16 has a cylindrical shape such as a substantially square cylinder shape or a substantially cylindrical shape. If it is tubular, a desiccant can be put inside. _{The thickness t 3} of the space 15 after division is determined _{according to the width t 1} of the spacer 16 in the thickness direction of the double glazing 11. _{The width t 2} of the spacer 16 in the depth direction of the double glazing 11 is preferably 5 to 15 mm.

In the present invention, it is preferable that the spacer 16 has a joint portion formed by joining a plurality of members, and the joint portion is arranged at a corner portion of the double glazing 11. At this time, it is more preferable that the joint portion is formed by joining members whose ends are cut at an angle θ / 2. However, θ indicates the angle of the corner portion of the double glazing 11, and θ is preferably 60 to 120 °. A joint portion formed by joining the ends of the members cut so that the angle θ / 2 of the end portion is 45 ° to the corner portion where the angle θ of the double glazing 11 shown in FIG. 1 is 90 °. Is placed. When arranging the connecting portion of the spacer 16 at the corner portion having an angle θ in this way, the rigidity of the joint portion of the spacer 16 is improved by joining the ends cut at an angle of θ / 2. As a result, the occurrence of wrinkles in the low emissivity film 14 is suppressed, so that the appearance of the obtained double glazing 11 is further improved. From the same viewpoint, it is also preferable that the outer surface of the spacer 16 is covered with the reinforcing tape 17 at the corner portion of the double glazing 11. Examples of the reinforcing tape 17 include an aluminum foil tape, a copper foil tape, a stainless foil tape, and the like.

FIG. 3 is a front schematic view showing an example of a joint portion formed by joining a substantially L-shaped member 18 to a tubular member. As shown in FIG. 3, it is preferable that the joint portion of the spacer 16 is formed by fitting and inserting a substantially L-shaped member 18 into a plurality of members to join the members. By joining the members to each other using the substantially L-shaped member 18, the rigidity of the joined portion is improved. As a result, the occurrence of wrinkles in the low emissivity film 14 is suppressed, so that the appearance of the obtained double glazing 11 is further improved.

FIG. 4 is a front view and a side view of the substantially L-shaped member 18 in the joint shown in FIG. The material of the substantially L-shaped member 18 is not particularly limited as long as it does not interfere with the effects of the present invention, and examples thereof include metals, plastics, and ceramics. From the viewpoint of further improving the rigidity of the joint portion, it is preferable that the substantially L-shaped member 18 has high rigidity. From this point of view, as the material of the substantially L-shaped member 18, metal and plastic are preferable, and metal is more preferable. Examples of the metal include zinc alloys such as ZDC1 and ZDC2, iron alloys, aluminum alloys, copper alloys, magnesium alloys and the like, and zinc alloys are preferable from the viewpoint of excellent workability. The substantially L-shaped member 18 made of metal can be obtained by a casting method or the like. As the plastic, FRP (fiber reinforced plastic) such as GFRP (glass fiber reinforced plastic) and CFRP (carbon fiber fiber reinforced plastic) is preferable.

The angle θ'of the substantially L-shaped member 18 is preferably 60 to 120 °. Normally, the angle θ'of the substantially L-shaped member 18 is the same as the angle θ'of the corner portion of the double glazing 11. Further, from the viewpoint of further improving the rigidity of the joint portion, the inner surface (space 15 side) surface and the outer side (peripheral side of the double glazing 11) surface of the substantially L-shaped member 18 are the inner surface and the surface of the spacer 16, respectively. It is preferable that they are in contact with each other. _{At this time, it is preferable that the length t 4} of the contact surface on the space 15 side of the substantially L-shaped member 18 in the plane direction of the double glazing 11 is 32 mm or more, respectively.

When the spacer 16 is made of metal, the joint portion in the spacer 16 may be formed by welding the members to each other.

It is also preferable that the spacer 16 has a bent portion, and the bent portion is arranged at a corner portion of the double glazing. The bent portion can be formed by bending one spacer.

In the present invention, the low emissivity film 14 in which the Fabry Perot interference filter is formed on one side or both sides of the plastic film is a film having a function of transmitting visible light and reflecting far infrared rays, and is a film having a function of transmitting visible light and reflecting far infrared rays, and is one side or both sides of the plastic film. It is a low-emissivity film formed by laminating a plurality of metals, metal oxides, and the like. Examples of such a low-emission film 14 include a low-emission film in which a metal such as Ag and a plurality of metal oxides such as _{SnO 2} , ZnO ₂ , and TiO _{2 are alternately laminated on one side or both sides of a plastic film.} Be done. The low emissivity film 14 has a visible light transmittance of 50% or more and a modified emissivity of 0.2 or less measured based on JIS R3107 from the viewpoint of ensuring heat insulation performance while maintaining transparency. Low emissivity film 14 is preferably used. Here, it is more preferable that the modified emissivity is 0.05 or less. The method for forming the Fabry-Perot interference filter is not particularly limited, and examples thereof include a method for forming the Fabry-Perot interference filter by sputtering or the like. As a specific example of the low emissivity film 14, a low emissivity film "Heat Mirror (registered trademark)" manufactured by Eastman Chemical Company or the like can be preferably used. Further, the low emissivity film 14 having the Fabry Perot interference filter formed on both sides of the plastic film has a visible light transmittance from the same viewpoint as the low emissivity film 14 having the Fabry Perot interference filter formed on one side thereof. A low emissivity film 14 having a surface emissivity of 50% or more and a surface emissivity of 0.2 or less on both sides is preferably used. As the low emissivity film 14, for example, a low emissivity film "Heat Mirror (registered trademark), TC: Twin Coat" manufactured by Eastman Chemical Company can be used.

In the present invention, the number of the low emissivity films 14 arranged in the space 15 between the glass plates 12 and 13 is not particularly limited as long as it is one or more, but from the viewpoint of improving the thermal transmission rate, it is 2. More than one is preferable. However, when a plurality of sheets are arranged, the visible light transmittance of the obtained double glazing 11 may decrease. Therefore, a low emissivity film is taken in consideration of the balance between the thermal transmission rate, the visible light transmittance and the heat shielding performance. It is important to select 14 types and the number of sheets. From this point of view, the number of low emissivity films 14 to be arranged is preferably 4 or less. When a plurality of films are arranged, when the low emissivity film 14 is arranged in the space 15 between the glass plates 12 and 13 and the space 15 is divided, the Fabry-perot interference filter surfaces face the separate spaces 15. It is preferable that they are arranged so as to do so. As a result, the value of the thermal transmissivity of the double glazing 11 can be lowered, which has the advantage of further increasing the heat insulating effect. From the same viewpoint, when the low emissivity film 14 in which the Fabry-Perot interference filter is formed on both sides of the plastic film is used, the embodiment in which only one is arranged is preferably adopted.

As shown in FIG. 2, in the present invention, the thickness t _{3 of the} space 15 divided by the low emissivity film 14 is preferably 5 to 18 mm. When the thickness t _{3 of the} divided space 15 is within the above range, there is an advantage that the double glazing 11 having an excellent heat insulating effect can be obtained. The present inventors have, depending on the thickness t ₃ of the divided spaces 15, has confirmed that there is a difference in heat transmission coefficient, the type of gas to be further enclosed in the space 15, is the divided It has also been confirmed that the optimum thickness of the space 15 is different. When the thickness of the divided space 15 is less than 5 mm, the double glazing 11 expands and contracts due to changes in temperature and atmospheric pressure, or an external force such as wind pressure is applied to the glass surface, so that the inner surface of the glass and the film are separated. There is a possibility that the performance of the low emissivity film 14 is impaired due to contact, more preferably at least one of the thickness t ₃ of the divided space 15 although more than 6mm, more preferably not less than 8 mm, the It is particularly preferable that all of the divided spaces 15 are 6 mm or more, and most preferably 8 mm or more. On the other hand, when the thickness t _{3 of the} divided space 15 exceeds 18 mm, the heat insulating performance may deteriorate, and it is more preferable that at least one _{of the thickness t 3 of the divided space 15 is 16 mm or less.} It is more preferable that all of the divided spaces 15 are 16 mm or less.

When argon gas is sealed in the space 15, the thickness t _{3 of the} divided space 15 is preferably 5 to 18 mm, more preferably 12 to 18 mm, and 16 mm at least one. Is more preferable, and it is particularly preferable that all of the divided spaces 15 are 12 to 18 mm, and most preferably 16 mm.

When krypton gas is sealed in the space 15, the thickness t _{3 of the} divided space 15 is preferably 5 to 18 mm, and at least one is more preferably 8 to 12 mm and 10 mm. Is more preferable, and it is particularly preferable that all of the divided spaces 15 are 8 to 12 mm, and most preferably 10 mm.

When xenon gas is sealed in the space 15, the thickness t _{3 of the} divided space 15 is preferably 5 to 10 mm, more preferably at least one is 5 to 8 mm, and 6 mm. Is more preferable, and it is particularly preferable that all of the divided spaces 15 are 5 to 8 mm, and most preferably 6 mm.

In the present invention, the gas is sealed in the space 15 between the glass plate 12 and the glass plate 13. As a result, the double glazing 11 of the present invention having a high heat insulating effect can be obtained. The gas is not particularly limited, and is preferably at least one selected from the group consisting of air, argon, krypton, and xenon. The gas is preferably a dry gas. From the viewpoint of enhancing the heat insulating effect, it is preferable that the space 15 is substantially filled with at least one gas selected from the group consisting of argon, krypton and xenon, among which only krypton or xenon is used. It is more preferable that the gas is substantially sealed. Here, substantially means that at least one gas selected from the group consisting of argon, krypton and xenon, or a gas consisting only of krypton or xenon is sealed in the space 15 at a filling rate of 90% or more. Indicates that you are.

The types of the outer glass plates 12 and 13 used in the double glazing 11 of the present invention are not particularly limited, and examples thereof include borosilicate glass and aluminosilicate glass in addition to soda lime glass for construction. Soda lime glass is preferable because it has excellent strength and heat resistance and is preferably used as a window glass or the like. From the same point of view, it is also preferable that the glass plate 12 and the glass plate 13 are strengthened glass plates. The plate thickness is appropriately selected depending on the use of the double glazing 11, but is preferably 0.5 to 19 mm, respectively. The glass plate 12 and the glass plate 13 used for the double glazing 11 may be the same or different. From the viewpoint of ensuring transparency, the visible light transmittance of the glass plate 12 and the glass plate 13 is preferably 80% or more.

In the double glazing 11 of the present invention, it is preferable that a low radiation layer is formed on the inner surface of at least one of the glass plate 12 and the glass plate 13. At this time, the low-emissivity film 14 facing the low-radiation zone is a low-emissivity film 14 having a Fabry-Perot interference filter formed on one side thereof, and the low-emissivity film 14 is a surface on which the Fabry-Perot interference filter is not formed. It is preferable that the low radiation zone faces each other. That is, it is preferable that the surface on which the low radiation layer of the glass plate is formed and the Fabry-Perot interference filter surface of the low emissivity film 14 are arranged so as to face separate spaces 15. As a result, the value of the thermal transmission rate of the double glazing 11 of the present invention can be lowered, which has the advantage of further increasing the heat insulating effect. The glass plate on which the low emissivity layer is formed is not particularly limited, and from the viewpoint of ensuring heat insulation performance while maintaining transparency, the visible light transmittance is 70% or more and the surface emissivity is 0.2. The following are preferably used. Examples of the low radiation zone include those in which a metal such as Ag and a plurality of metal oxides such as _{SnO 2} , ZnO ₂ and TiO _{2 are laminated.} The method for forming the low radiation zone is not particularly limited, and examples thereof include a method of coating the surface of the glass plate with the low radiation zone by sputtering or the like.

The space between the glass plate 12 and the spacer 16, the space between the glass plate 13 and the spacer 16, and the space between the low emissivity film 14 and the spacer 16 are sealed by the primary sealing material 19, respectively. Examples of the primary sealing material 19 include a solvent-free type sealing material, and among them, butyl rubber is preferable because it has a particularly high gas barrier property. Further, a double-sided tape can also be used as the primary sealing material 19.

The space between the glass plate 12 and the glass plate 13 on the outside of the primary sealing material 19 and the spacer 16 is sealed by the secondary sealing material 20. At this time, it is preferable that the low-emissivity film 14 projects outward from the primary sealing material 19 and the end portion of the low-emissivity film 14 is included by the secondary sealing material 20. By holding the low emissivity film 14 by the secondary sealing material 20 in this way, the occurrence of wrinkles is further suppressed, so that the appearance of the obtained double glazing 11 is further improved.

_{As shown in FIG. 2, the width t 5} of the secondary sealing material 20 in the depth direction of the double glazing 11 is n × 1 mm to n × 20 mm (n is the number of the low emissivity films 14). It is preferable to have. If the width t ₅ is less than n × 1 mm, the gas barrier property may be insufficient or wrinkles may easily occur in the low emissivity film 14. It is more preferable that the width t ₅ is n × 2 mm or more. On the other hand, when the width t ₅ exceeds n × 20 mm, when the double glazing 11 is used as the window glass, the spacer 16 of the double glazing 11 does not fit in the swallowed portion of the general-purpose sash, and the general-purpose window. It may not be used as glass.

Examples of the secondary sealing material 20 include urethane resin, silicone resin, and sulfide resin. Of these, urethane resin is preferable from the viewpoint of excellent adhesion to the low emissivity film 14 and gas barrier properties. On the other hand, a silicone resin is preferable from the viewpoint of excellent durability. The secondary sealing material 20 may be a single layer or may be a laminate of a plurality of resin layers. From the viewpoint of achieving both adhesiveness and gas barrier properties with the low emissivity film 14 and durability, it is preferable that the secondary sealing material 20 has an inner layer made of polyurethane and an outer layer made of silicone. At this time, it is preferable that the reinforcing member 21 is arranged between the inner layer and the outer layer.

As described above, the primary sealing material 19 and the secondary sealing material 20 prevent the intrusion of outside air into the space 15, and the spacer 16 and the low emissivity film 14 are fixed to the glass plate 12 and the glass plate 13. To.

In the present invention, it is necessary that the reinforcing material 21 is arranged inside the secondary sealing material 20. As a result, the occurrence of wrinkles in the low emissivity film 14 is suppressed, so that the appearance of the obtained double glazing 11 is improved. Further, by arranging the reinforcing material 21 inside the secondary sealing material 20, the amount of gas that escapes to the outside through the secondary sealing material is reduced, and the gas barrier property is improved. A major feature of the present invention is that by using such a reinforcing material 21, gas barrier properties and durability can be compatible at a high level, which is difficult to achieve in the prior art. Conventionally, when a low emissivity film is arranged between glass plates, wrinkles are generated in the low emissivity film, resulting in poor appearance. In particular, when a plurality of low-emissivity films are arranged or when a large low-emissivity film is arranged, the appearance and gas barrier properties are significantly deteriorated, and improvement thereof has been required.

As a result of studies to improve these points, the present inventors have found the following. When producing double glazing on which a low emissivity film is arranged, usually, the low emissivity film arranged between the glass plates is held by using a spacer, a primary sealing material and a secondary sealing material. Next, the space between the glass plates is divided by spreading the low emissivity film while heating so as not to cause wrinkles. Here, when the shrinking force of the low emissivity film is large, the spacer is deformed and the low emissivity film is shrunk to cause wrinkles. On the other hand, when the present inventors widened the width of the secondary sealing material in the depth direction of the double glazing, some improvement was observed, but it was still insufficient. In particular, when two or more low emissivity films are arranged, the inner spacers are deformed more than the outer spacers, which causes deterioration of appearance and gas barrier properties. As a result of further studies, the present inventors have found that by arranging the reinforcing material 21 inside the secondary sealing material 20, wrinkles are significantly suppressed and the appearance of the obtained double glazing 11 is improved. At the same time, it was found that the gas barrier property was also improved. By arranging the reinforcing material 21, the deformation of the spacer 16 is suppressed, and even if a plurality of low emissivity films 14 are arranged and a large contraction force is generated, the force is dispersed to all the spacers 16 and is therefore specified. It is considered that only the spacer 16 of the above is not extremely deformed. As a result, it is considered that the occurrence of wrinkles is suppressed. Further, by arranging the reinforcing material 21 inside the secondary sealing material 20, the permeation of gas is suppressed and the deformation of the spacer is also suppressed, so that it is considered that the gas barrier property is improved.

The material of the reinforcing material 21 is not particularly limited as long as it does not interfere with the effects of the present invention, and examples thereof include metals, ceramics, and plastics. From the viewpoint of further suppressing the occurrence of wrinkles in the low emissivity film 14, the reinforcing material 21 preferably has high strength and rigidity. From this point of view, as the material of the reinforcing material 21, metal and plastic are preferable, and metal is more preferable. As the metal, steels such as stainless steel and carbon steel; aluminum alloys; copper alloys and the like are preferable, and among them, steel is more preferable, and stainless steel is further preferable. As the plastic, fiber reinforced plastics such as GFRP (glass fiber reinforced plastic) and CFRP (carbon fiber fiber reinforced plastic) with enhanced strength and rigidity are preferable.

The shape of the reinforcing material 21 is not particularly limited as long as it does not hinder the effect of the present invention, but examples thereof include a substantially rectangular plate shape and a rod shape, and deformation of the spacer 16 is suppressed in the low emissivity film 14. The former is preferable from the viewpoint of further suppressing the occurrence of wrinkles. When the reinforcing material 21 has a substantially rectangular plate shape, its thickness is preferably 0.1 to 2 mm. The reinforcing material 21 may be arranged inside the secondary sealing material 20 arranged on at least one side of the double glazing 11, but from the viewpoint of further suppressing the occurrence of wrinkles in the low emissivity film 14. , It is preferable that the secondary sealing material 20 is arranged inside the secondary sealing material 20 arranged on all sides.

As shown in FIG. 2, the inner surface of the reinforcing material 21 and the outer surface of the spacer 16 are formed from the viewpoint that the deformation of the spacer 16 is suppressed and the generation of wrinkles in the low emissivity film 14 is further suppressed. It is preferable that they are arranged so as to face each other. FIG. 5 is a side view of an example of the double glazing 11 of the present invention. Specifically, it is preferable that the reinforcing member 21 is arranged so as to overlap the spacer 16 in the side view. _{Further, as shown in FIG. 2, it is preferable that the width t 6} of the reinforcing material 21 in the thickness direction of the double glazing 11 is 0.2 mm or more narrower than _{the distance t 7} between the glass plates 12 and 13. When the difference (t ₇ −t _{6 ) between the distance t 7} between the glass plates 12 and 13 and the width t _{6 of the} reinforcing material is less than 0.2 mm, when the double glazing 11 is deformed, the glass plate 12 Alternatively, the glass plate 13 and the reinforcing material 21 may interfere with each other to damage the double glazing 11. On the other hand, from the viewpoint of suppressing the deformation of the spacer 16 and further suppressing the occurrence of wrinkles in the low emissivity film 14, the difference _{between the distance t 7} between the glass plates 12 and 13 and the width t _{6 of the reinforcing material (t 7).} -T ₆ ) is preferably less than 10 mm.

As shown in FIG. 3, it is preferable that the spacer 16 has a joint formed by joining a plurality of members, and the reinforcing member 21 is arranged at a position facing the joint. As a result, the deformation of the spacer 16 is suppressed, and the generation of wrinkles in the low emissivity film 14 is further suppressed. When the joint portion of the spacer 16 is formed by using the substantially L-shaped member 18, the reinforcing member 21 and the substantially L-shaped member 18 may face each other.

As shown in FIG. 2, the distance t ₈ between the reinforcing member 21 and the spacer 16 is preferably 0.5 mm or more. If the distance is less than 0.5 mm, the reinforcing member 21 and the spacer 16 may interfere with each other when the double glazing 11 is deformed.

The double glazing 11 of the present invention preferably has a thermal transmissivity of 1.0 W / m ² · K or less. As described above, by using the double glazing 11 having a low thermal transmission rate and excellent heat insulating performance as a window glass of a building or the like, it is possible to significantly reduce energy consumption. The thermal transmission rate is ^{more preferably 0.4 W / m 2} · K or less. The thermal transmissivity can be adjusted by the number of low emissivity films 14, the thickness of the divided space 15, the type of gas to be enclosed, the presence or absence of the low emissivity layer formed on the glass plate 12 or the glass plate 13, and the like. Is. The double glazing 11 of the present invention suppresses the generation of wrinkles in the low emissivity film 14 even when the number of the large number of low emissivity films 14 is large, so that an excellent appearance is maintained. Therefore, the heat insulating performance can be significantly improved by increasing the number of low emissivity films 14.

The total thickness of the double glazing 11 of the present invention is not particularly limited, but is preferably 80 mm or less. When the double glazing 11 is used as a window for a general building, the total thickness is more preferably 45 mm or less, and further preferably 38 mm or less. According to the present invention, the number of low emissivity films 14 can be increased while maintaining excellent appearance and gas barrier properties. By increasing the number of low emissivity films 14 in this way, the heat insulating performance can be improved without significantly increasing the total thickness.

The visible light transmittance of the double glazing 11 of the present invention may be adjusted according to the intended use and is not particularly limited. From the viewpoint of daylighting when the double glazing 11 is used as a window glass for a building, it is preferably 50% or more.

Hereinafter, the method for producing the double glazing 11 of the present invention will be described with reference to FIGS. 1 and 2. A low emissivity film 14 in which a glass plate 12 and a glass plate 13 are arranged in parallel on a spacer 16 and a Fabry Perot interference filter is formed on one side of a plastic film in a space 15 between the glass plate 12 and the glass plate 13. At least one is placed. At this time, the low emissivity film 14 is held by the spacer 16, the primary sealing material 19, and the secondary sealing 20. The space 15 is then divided by stretching the low emissivity film 14. At this time, from the viewpoint of suppressing the generation of wrinkles in the low emissivity film 14, it is preferable to spread the film while heating. After that, each of the divided spaces 15 is filled with gas, and the space 15 is sealed by the spacer 16, the primary sealing material 19, and the secondary sealing material 20. When filling gas, holes are made in advance in the spacer 16 and the reinforcing material 21 as a gas filling portion, so that two holes for gas filling are provided in one divided space 15. Gas is filled through the holes in the place. After that, the gas filling portion is screwed and sealed with the secondary sealing material 20 from above. In this way, the double glazing 11 can be obtained.

The double glazing 11 of the present invention thus obtained has excellent heat insulating properties because the space between the glass plates 12 and 13 is divided by the low emissivity film 14. According to the present invention, the occurrence of wrinkles in the low emissivity film 14 is suppressed, so that the double glazing 11 has a good appearance. Moreover, the double glazing 11 has a high gas barrier property. Therefore, the double glazing is suitably used as a window glass of a building such as a building or a house, a transparent wall material, or the like.

Hereinafter, the present invention will be described in more detail with reference to Examples.

Example 1
As the glass plate 12, reinforced soda lime glass having a length of 1292 mm, a width of 935 mm, and a thickness of 3 mm having a low radiation zone formed on one side was used. Further, as the glass plate 13, reinforced soda lime glass having a length of 1292 mm, a width of 935 mm, and a thickness of 3 mm was used. As the low-emissivity film 14, a low-emissivity film [“Heat Mirror (registered trademark)” manufactured by Eastman Chemical Company] in which a Fabry Perot interference filter was formed on one side of a plastic film was used. Butyl rubber was used as the primary sealing material 19. Polyurethane resin was used as the secondary sealing material 20. As the reinforcing material 21, a stainless steel plate having a thickness of 0.5 mm, a width of 46.5 mm, and a length of 797 to 1260 mm was used.

The spacer 16 was prepared as follows. The corner portion of the substantially L-shaped member 18 made of zinc alloy shown in FIG. 4 was coated with butyl rubber. This is fitted into a tubular stainless steel member whose end is cut so that the angle θ / 2 is 45 °, and then the outer surface is covered with reinforcing tape 17 (aluminum tape) to cover the joint. Formed (see FIG. 3). In this way, a substantially rectangular spacer 16 having a length of 1274 mm and a width of 916 mm was obtained in which joints were formed at each corner.

As shown in FIG. 2, four low emissivity films 14 were arranged between the glass plates 12 and 13. _{The width t 1} in the thickness direction is 9.5 mm _{so that the thickness t 3} of each space 15 divided between the glass plate 12 or the glass plate 13 and the low emissivity film 14 and between the low emissivity films 14 is 10 mm. A tubular spacer 16 having a width t _{2 in the} depth direction of 9.5 mm was arranged. At this time, the glass plate 12 and the low-emissivity film 14 were arranged so that the low-emissivity layer of the glass plate 12 and the low-emissivity perot interference filter surface of the low-emissivity film 14 were all facing downward in FIG. The space between the glass plate 12 and the spacer 16, the space between the glass plate 13 and the spacer 16, and the space between the low emissivity film 14 and the spacer 16 were sealed with a primary sealing material 19, respectively. The outside of the primary sealing material 19 and the spacer 16 was filled with polyurethane resin. The reinforcing material 21 was arranged on the outside of the polyurethane resin. A length of 1260 mm was used for the long side, and a length of 885 mm or 797 mm was used for the short side. At this time, the reinforcing material 21 is arranged so that the distance between the glass plate 12 and the reinforcing material 21 and the distance between the glass plate 13 and the reinforcing material 21 are 2 mm, respectively, and the distance between the reinforcing material 21 and the spacer 16 is 4 mm. did. Further, as shown in FIG. 3, the reinforcing member 21 is arranged at the corner portion so as to face the substantially L-shaped member 18. However, since a hole for filling gas is provided in the vicinity of the corner portion on one short side as described later, a reinforcing material 21 having a length of 797 mm is arranged so that this hole is not blocked. .. In this way, after the reinforcing material 21 was arranged on each side, a polyurethane resin was further filled to form a secondary sealing material 20 having _{a width t 5 in the depth direction of 9 mm.}

The low emissivity film 14 is held by the spacer 16, the primary sealing material 19, and the secondary sealing material 20. Here, one short side of each spacer 16 is pre-drilled with two holes as a gas filling portion. Next, after the secondary sealing material 20 had hardened, the low emissivity film 14 was spread while heating at 100 ° C. using a warm air convection heating furnace. Then, each space was filled with krypton gas from the gas filling portion. Next, the gas-filled portion was screwed and sealed with a polyurethane resin from above. When the double glazing 11 thus obtained was visually observed, the low emissivity film 14 had no wrinkles and had an excellent appearance.

Comparative Example 1
The double glazing 11 was produced in the same manner as in Example 1 except that the reinforcing material 21 was not arranged. When the obtained double glazing 11 was visually observed, wrinkles were generated at the corners of the low emissivity film 14, and the appearance was poor. In particular, a large number of wrinkles were generated on the inner low emissivity film 14.

11 Double glazing 12, 13 Glass plate 14 Low radiation film 15 Space 16 Spacer 17 Reinforcing tape 18 Approximately L-shaped member 19 Primary sealing material 20 Secondary sealing material 21 Reinforcing material t ₁ Width of spacer in the thickness direction of double glazing t ₂ Width of the spacer in the depth direction of the double glazing t ₃ Thickness of the space after division t ₄ Length of the contact surface of the substantially L-shaped member in the plane direction of the double glazing on the space side t _{5 Of the} double glazing Width of secondary sealing material in the depth direction t ₆ Width of reinforcing material in the thickness direction of double glazing t ₇ Distance between glass plates t ₈ Distance between reinforcing material and spacer

Claims (11)

A double glazing in which a glass plate and a glass plate are arranged so as to form a space via spacers arranged on the peripheral edge of the glass plate.
The space is divided by arranging at least one low-emissivity film having a Fabry-Perot interference filter formed on one side or both sides of the plastic film in the space.
The space between the glass plate and the spacer and the space between the low emissivity film and the spacer are each sealed with a primary sealing material.
The space between the primary sealing material and the glass plate on the outside of the spacer is sealed with the secondary sealing material.
The low emissivity film protrudes outward from the primary sealing material, and the secondary sealing material includes the end portion of the low emissivity film.
The substantially rectangular plate-shaped reinforcing member to the inside of the secondary sealing material, Ri name and outer surface of the spacer and the inner surface of the reinforcing member is arranged so as to face,
The reinforcing member is made of metal, insulating glass the thickness of said reinforcing member and said 0.1~2mm der Rukoto. The double glazing according to claim 1, wherein the width of the reinforcing material in the thickness direction of the double glazing is 0.2 mm or more narrower than the distance between the glass plates. The width of the secondary sealing material in the depth direction of the double glazing is n × 1 mm to n × 20 mm (n is the number of the low emissivity films), and the distance between the reinforcing material and the spacer is 0. The double glazing according to claim 1 or 2 , which is 5 mm or more. The double glazing according to any one of claims 1 to 3 , wherein the spacer has a joint formed by joining a plurality of members, and a reinforcing material is arranged at a position facing the joint. The duplex according to claim 4 , wherein the spacer is formed by fitting the substantially L-shaped member into the plurality of members to join the members, and the angle of the substantially L-shaped member is 60 to 120 °. Layered glass. Any of claims 1 to 5 , wherein the spacer has a joint portion formed by joining members whose ends are cut at an angle θ / 2, and the joint portion is arranged at a corner portion of double glazing. The double glazing described. However, θ indicates the angle of the corner portion, and θ is 60 to 120 °. The double glazing according to any one of claims 1 to 3 , wherein the spacer has a bent portion, and the bent portion is arranged at a corner portion of the double glazing. The double glazing according to any one of claims 1 to 7 , wherein the outer surface of the spacer is covered with a reinforcing tape at a corner portion of the double glazing. The double glazing according to any one of claims 1 to 8 , wherein the glass plate is made of tempered glass. The double glazing according to any one of claims 1 to 9 , wherein the space is filled with at least one gas selected from the group consisting of air, argon, krypton and xenon. The double glazing according to any one of claims 1 to 10 , wherein the secondary sealing material has an inner layer made of polyurethane and an outer layer made of silicone, and a reinforcing material is arranged between the inner layer and the outer layer.