JP2002226237A - Double-layered glass with heat screening film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide double-layered glass having a heat screening film such as a visible heat reflecting film and low emissivity film (Low-E) which is free from a streak-like or spot-like striped pattern. SOLUTION: The double-layered glass is obtained by bonding outer peripheries of two glass plates racing each other through a spacer material and sealing airtightly using a sealing material, where the outside glass plate is unstrengthened float glass with a visible heat screening film formed on its air layer side surface, and the room-side glass plate is strengthened glass, and the heat screening film is a heat reflecting film or a low emissivity film (Low-E).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-glazed glass having a heat shielding film such as a heat ray reflective film or a low emissivity (Low-E, Low-Emissivity) film. The present invention relates to a double-glazing system which does not generate stripes or mottled stripes even when a shielding film is provided.

[0002]

2. Description of the Related Art A heat-reflective glass in which an oxide thin film of a metal or the like is formed on the surface of a glass plate by a spraying method or a sputtering method, and a glass plate in which a heat-reflective film is adhered to the glass plate surface are made of visible light or solar light. It has excellent reflection and absorption properties, and has been widely used as a window glass for buildings and vehicles for the purpose of reducing direct sunlight and protecting privacy.

On the other hand, in recent years, double glazing has become widespread in order to reduce the cooling and heating load of buildings from the viewpoint of energy saving. It is common practice to form an oxide thin film or use a heat ray reflective glass to which a heat ray reflective film is adhered as a glass plate constituting a multi-layer glass.

As glass sheets constituting these double-glazed glasses, glass sheets having a double strength are used for both the indoor and outdoor glass, or unreinforced glass (sometimes called green sheet) is used. The heat ray reflective film is provided on any surface of the glass plate on the side facing the air layer of the multilayer glass.

[0005] For example, Japanese Utility Model Application Laid-Open No. Sho 56-70079 discloses that a glass plate to which a heat ray reflective film is adhered is opposed to another glass plate with the above-mentioned film surface inward at intervals. A double glazing unit that is airtightly bonded and integrated is disclosed.

[0006] Alternatively, Japanese Patent Application Laid-Open No. 1-105895 discloses that an outer glass plate made of a heat-absorbing glass having a main body and an annealed glass having a surface in a range of 15 nm to 40 nm on a surface facing the outer glass plate. A double glazing unit comprising an inner glass pane having a coating comprising a silver layer of thickness is disclosed, further comprising a double glazing unit comprising an outer glass pane entirely or partially of tempered glass. Is disclosed.

[0007]

Problems to be Solved by the Invention
No. 895, in which the outdoor glass sheet is a tempered glass sheet, when the outdoor glass sheet is broken, the broken glass sheet becomes a large number of small crushed pieces throughout the ground. As the height of the building increases, the impact force when the crushed pieces reach the ground increases, which is not preferable in terms of safety.

In such a case, the size of the broken pieces when broken is not fine, and unreinforced glass or double-strength glass, which adheres and supports the pieces by the adhesive force of the sealing material of the window frame, is more effective. Yes, it is generally used for the outer walls of buildings and the like.

Generally, a heat-treated glass plate such as tempered glass or double-strength glass necessarily has a polarizing distortion inside the glass plate and is coated with a transparent heat ray reflective glass having high visible light transmittance. In the case of a double-strength glass, it is generally well known that this polarization distortion causes a distorted stripe pattern, but in particular, the double-strength glass has a more pronounced occurrence of the stripe pattern than when it is tempered glass. Was.

In particular, when a double glazing is formed by combining another transparent double-strength glass, that is, two glass plates constituting the double glazing are double-strength glass, and the inner side surface of the outer double-strength glass, When the heat ray reflective film is provided on the air layer side surface of the multi-layer glass, the stripes or mottled stripes on the heat ray reflective film surface are more pronounced due to the internal distortion of the double-strength glass than in the case of a single plate. The stripe pattern has a problem that appearance is poor not only in the case where the indoor is viewed from the indoor side but also in the case where the indoor is viewed from the outdoor side.

This striped pattern is a peculiar phenomenon of the specification in which a transparent heat ray reflective film or the like is formed on the double-strength glass, and there is a slight difference in the shape of the pattern depending on the manufacturing method of the double-strength glass. .

Further, the two glass sheets constituting the double-glazed glass are untempered glass (raw glass), and a heat ray reflective film is formed on the inner side surface of the outer untempered glass, that is, on the air layer side of the double-glazed glass. Is provided, no stripes or mottled stripes are formed on the heat ray reflective film surface, and the appearance does not deteriorate even when viewed from both directions inside and outside the room. There is a problem that cracks and the like are apt to occur and strength is inferior, and the sheet thickness configuration has to be increased.

Further, the double-glazed glass to which the heat ray reflective film described in Japanese Utility Model Application Laid-Open No. Sho 56-70079 is applied not only takes time and labor to uniformly attach the film to the glass plate, but also requires time and labor. The adhesive part of the film adhered to the glass plate may be deteriorated or discolored by sunlight due to aging, and it is inevitable that the appearance deteriorates.

[0014]

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems, that is, even when a transparent heat-shielding film such as a heat-ray reflecting film is provided on the glass plate surface, it has a streak-like shape. Various stripes such as mottled shape do not occur, the appearance is not inferior when viewed from both directions inside and outside the room, the total thickness of the double glazing is kept low, there is no thermal cracking, and the building An object of the present invention is to reduce the cooling and heating load, reduce the direct sunlight and protect the privacy, maintain the wind pressure intensity, have good transparency as a glass plate, and block noise.

That is, according to the present invention, in a multilayer glass plate in which the outer peripheral portions of two opposing glass plates are bonded via a spacer material and then sealed with a sealing material, the outer glass plate is transparent to the air layer surface side. A double-glazed glass with a heat-shielding film, characterized in that it is made of unstrengthened float glass on which a heat-shielding film with a film is formed, and that the indoor glass plate is made of tempered glass.

Alternatively, the present invention provides a laminated glass comprising, as the outer glass, one of unreinforced glass, double-strength glass, and tempered glass, and unreinforced glass on which a heat shielding film is formed. The above-mentioned double-glazing unit with a heat shielding film, characterized in that it is configured to face an air layer.

Alternatively, the present invention is characterized in that the inner glass is a laminated glass obtained by freely combining any of the same or different types of unstrengthened glass, double-strength glass, and tempered glass. It is a multi-layer glass with a film.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a double glazing G according to the present invention.

The present invention relates to two opposing glass plates 1, 2
Is bonded through a spacer material 5 containing a desiccant, and a sealing material 6 is filled in a recess between the spacer material 5 and the glass plates 1 and 2 to seal the outer glass plate 1 with the air. It is unstrengthened float glass (usually referred to as a raw plate) in which the heat shielding film 3 is formed on the side facing the layer 4, while the room-side glass plate 2 is tempered glass.

Alternatively, the outer glass 1 may be a laminated glass in which a plurality of glass plates are bonded with an intermediate film such as PVB (polyvinyl butyral), and unreinforced glass, double-strength glass, Any one glass plate 1a of tempered glass and heat shielding film 3
Laminated glass 1 comprising unstrengthened glass 1b on which
The heat shielding film 3 may be configured on the side facing the air layer 4, but in this case, the laminated glass including the unreinforced glass plate and the unreinforced glass plate has a stripe pattern. It is preferable in preventing occurrence.

Similarly, the inner glass 2 is a laminated glass in which a plurality of glass plates are bonded by an intermediate film such as PVB, and unreinforced glass, double-strength glass, It is also possible to use a laminated glass in which the same or different types of glass plates are combined and bonded.

As the visible light transmittance of the heat shielding film 3 becomes smaller, a stripe pattern or the like due to the internal distortion is not conspicuous even if the heat shielding film 3 is formed on a tempered glass or a double-strength glass having internal distortion. As the light transmittance increases, the stripe pattern becomes conspicuous. In particular, in the case of double-strength glass, a stripe pattern appears more strongly than in tempered glass.

However, when the film is formed on unstrengthened glass whose internal strain is very small as compared with double-strength glass, it does not stand out even if the visible light transmittance is increased to some extent.

The heat shielding film 3 is, for example, a heat ray reflection film or a low radiation film (Low-E film).

Here, a shatterproof film can be attached to the double-glazed glass G.

When the outer glass plate 1 and the inner glass plate 2 constituting the double-glazed glass G are laminated glass, a resin film such as PVB as an adhesive does not only scatter the broken glass. In addition, if an ultraviolet absorber is added, it is also possible to limit and cut the ultraviolet rays entering the room, thereby limiting the incidence of ultraviolet rays harmful to the human body, and also prevent fading of interior decorations etc. Can be prevented.

Further, the function of cutting off the ultraviolet rays prevents the silicone sealing material as the sealing material in the supporting structure of the glass plate from being irradiated with the ultraviolet rays, and thereby the holding force as the sealing material and the sealing property of the double-glazed glass. (Low moisture permeability) can be maintained.

Furthermore, it is known that if the laminated glass has a different thickness, it has a soundproofing and a soundproofing effect, and it is possible to reduce the noise from the outside of a vehicle or the like and the noise to the outside. In addition to the heat insulating properties of the double glazing, it is also effective for sound insulation and sound insulation.

Although the preferred embodiment has been described above, the present invention is not limited to this, and various applications can be considered.

As the spacer, a metal spacer such as aluminum in which a desiccant or a moisture absorbent is sealed is generally used, but a resin spacer such as a plastic into which a desiccant or a moisture absorbent is mixed may be used. EXAMPLE As shown in FIG. 1, an unstrengthened float glass having a thickness of 6 mm, in which a heat ray reflective film 3 made of a metal thin film or the like is formed on the surface facing the indoor side as the outer glass plate 1 of the double-glazed glass G, did. The indoor glass plate 2 was made of tempered glass having a thickness of 12 mm, and the thickness of the air layer 4 between the two glass plates 1 and 2 was set to 10 mm.

Since the heat ray reflecting glass 1 provided on the outdoor side is made of unreinforced tempered glass, no stripe pattern is generated due to internal distortion, and the indoor side glass 2 is made of tempered glass, so Even if the tempered glass self-destructs, there is little danger of falling outside the room.

Further, the wind pressure load is such that the thickness ratio of the two glass plates 1 and 2 of the double-glazed glass G is 1: 2 (the outdoor-side sheet thickness:
Since the sheet thickness on the indoor side is dispersed by 12 mm), even if the unstrengthened glass sheet 1 on the outdoor side is made thinner, if the glass sheet 2 on the indoor side is made thicker, there is no problem in strength, and the multi-layer glass The total thickness of G of 22 mm can be made slightly smaller than the total thickness of conventional double-glazing, and there is no danger of thermal cracking or the like.

As a modified embodiment shown in FIG. 2, the outer glass plate 1 of the double-glazed glass G of the above-mentioned embodiment is formed by using unreinforced glass 1a having a thickness of 4 mm and unreinforced glass 1b having a thickness of 4 mm.
B is a laminated glass adhered by an intermediate film such as B. A plate constituting the laminated glass 1 and having a non-tempered glass 1b disposed on the indoor side facing the indoor side is made of a metal thin film or the like. 8m thick with the heat ray reflective film 3 formed
m of laminated glass.

The indoor side glass plate 2 has a thickness of 12 mm.
Air glass 4 between the two glass plates 1 and 2
Was 10 mm in thickness.

Since the unstrengthened float glass is used as the glass plate 1b having the heat ray reflective film 3 constituting the laminated glass 1 provided on the outdoor side, no stripe pattern is generated due to internal distortion, and the indoor side is not. By using glass 2 as tempered glass, even if the tempered glass self-destructs,
There is little danger of falling outside.

Further, since the outdoor glass 1 is a laminated glass, even if the outdoor glass 1 is damaged, it can be prevented from falling to the ground.

As another modified embodiment shown in FIG. 3, the outer glass plate 1 of the double-glazed glass G is formed by forming a heat ray reflective film 3 made of a metal thin film or the like on a surface facing the indoor side.
mm unstrengthened float glass.

Further, the indoor side glass plate 2 is made of a tempered glass 2a having a thickness of 6 mm and an untempered glass 2b having a thickness of 6 mm.
A laminated glass having a thickness of 12 mm was formed as a laminated glass bonded by an intermediate film 2c such as VB, and the thickness of the air layer 4 between the two glass plates 1 and 2 was set to 10 mm.

Since the heat ray reflective glass 1 provided on the outdoor side is made of unreinforced tempered float glass, no stripe pattern is generated due to internal distortion, and the indoor side glass 2 is made of laminated glass, so that Even if one indoor side glass 2 is broken, it does not fall outside.

Further, there is no problem in the strength of the wind pressure load and the like as in the embodiment.
m can be made slightly thinner than the total thickness of conventional double glazing,
There is no danger of heat cracking. Comparative Example 1 The structure shown in FIG. 4 is a structure of a commonly used double-glazed glass, which is an outer glass plate 1 ′ of a double-glazed glass G ′, and a surface facing the indoor side is formed of a metal thin film or the like. 10 mm thick double strength glass on which the heat ray reflective film 3 was formed.
Further, the indoor side glass plate 2 ′ is a double-strength glass having a thickness of 10 mm, a double-strength glass G ′ having a total thickness of 30 mm where the thickness of the air layer 4 between the two glass plates 1 ′ and 2 ′ is 10 mm. did.

Since the heat ray reflective glass provided as the outdoor glass 1 ′ is double strength glass, it has a distortion inside the glass plate, and the heat ray reflective film 3 generates streak-like or mottled stripes. Was seen. Comparative Example 2 As shown in FIG. 5, the outer glass plate 1 ″ of the double-glazed glass G ″
An untempered float glass having a thickness of 15 mm and having a heat ray reflective film 3 made of a metal thin film or the like formed on the surface facing the indoor side. Also, for the indoor side glass plate 2 ″,
An unstrengthened float glass having a thickness of 15 mm was used, and the thickness of the air layer 4 between the two glass plates 1 ″ and 2 ″ was set to 10 mm to form a double-layer glass G ″ having a total thickness of 40 mm.

In this case, since both of the glass sheets are made of unstrengthened float glass, no streak-like or mottled stripes are generated due to internal distortion, but the glass sheet may be thermally cracked. Therefore, there is a problem that the thickness of each glass plate must be increased, and the total thickness increases.

[0043]

According to the present invention, even if it is a double-glazed glass having a transparent heat-shielding film provided on a glass plate, various stripes such as streaks and mottles are not generated on the surface of the glass plate. ,
The appearance does not deteriorate even when viewed from both directions inside and outside the room.

Further, even if the total thickness of the double-glazed glass is made of double-strength glass and double-strength glass, it is possible to maintain the wind pressure strength without generating thermal cracks while keeping the same thickness or thinness.

Furthermore, even if the glass breaks, there is little danger of falling to the outside of the room, and the cooling and heating load of the building can be reduced.
In addition, it can reduce direct sunlight and protect privacy, and can also block noise.

As described above, when at least one of the outer glass plate and the inner glass plate constituting the double-glazed glass is a laminated glass, the broken glass is not scattered by a resin film such as PVB. Not only that, it is also possible to limit and cut off the ultraviolet rays entering the room, thereby restricting the incidence of ultraviolet rays harmful to the human body, and prevent fading or the like of interior decorations and the like.

Further, since the laminated glass has a different thickness, a soundproofing effect can be expected, the noise from the outside of a vehicle or the like and the noise to the outside can be reduced. In addition, it is effective for sound insulation and soundproofing.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a double glazing of the present invention.

FIG. 2 is a longitudinal sectional view of a double-glazed glass according to a modified example.

FIG. 3 is a longitudinal sectional view of a multi-layer glass according to another modified example.

FIG. 4 is a longitudinal sectional view of the double-glazing of Comparative Example 1.

FIG. 5 is a vertical cross-sectional view of the double-glazed glass of Comparative Example 2.

[Explanation of symbols]

 G, G ', G "Insulated glass 1, 1', 1" Outer glass plate 2, 2 ', 2 "Inner glass plate 3 Heat shielding film 4 Air layer 5 Spacer 6 Sealing material

Continued on the front page F-term (reference) 4G061 AA02 AA03 AA04 AA11 AA20 AA21 AA23 AA26 AA27 BA01 BA02 CA02 CB02 CB14 CD02 CD19 CD21 DA26 DA43

Claims (4)

[Claims] 1. An outer glass plate having a transparent heat shield on an air layer surface side in a double-layer glass plate in which outer peripheral portions of two opposing glass plates are bonded via a spacer material and then sealed with a sealing material. A double-glazed glass with a heat-shielding film, wherein the glass is unstrengthened float glass, and the indoor glass plate is tempered glass. 2. The outer glass is a laminated glass comprising any one of untempered glass, double-strength glass, and tempered glass, and an untempered glass on which a heat shielding film is formed, wherein the heat shielding film faces the air layer. The double-glazing unit with a heat shielding film according to claim 1, wherein 3. The heat shield according to claim 1, wherein the inner glass is a laminated glass obtained by freely combining any of the same or different types of unreinforced glass, double-strength glass, and reinforced glass. Multi-layer glass with film. 4. The double-glazing unit with a heat-shielding film according to claim 1, wherein said heat-shielding film is a heat-ray reflection film or a low-emission film (Low-E film). .