JPH066548U - Heat ray reflective glass block - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a heat-reflecting glass block that has no or very little deterioration in heat-reflecting properties even when used for a long time as a building exterior material. [Structure] The heat ray reflective glass block 10 is 145 × 1
It has a size of 45 × 95 mm and has a hollow box shape, and metal oxide coatings 11 a and 11 b having a film thickness of 250 Å are formed on the inner sides of both transparent surfaces.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat ray reflective glass block used exclusively as an outer wall material of a building.

[0002]

[Prior art]

 A glass block is a glass molded body having a hollow box shape and is widely used as an exterior or interior material for buildings because it has excellent heat insulation, sound insulation and translucency.

There are various sizes and appearances of glass blocks, but as a glass block used exclusively for the outer wall material of a building, it is difficult to pass heat rays to the outside of one or both of the transparent surfaces. There is a so-called heat ray reflective glass block formed with a metal oxide film which is easily reflected.

When this heat ray reflective glass block is used as an outer wall material of a building, the heat dose into the room is small, so that it is easy to perform air conditioning in the summer, and from the outside of the building, it looks like a mirror, which makes it unique. It will have an appearance.

When manufacturing this type of glass block, first, the glass is formed into a box shape with an open bottom, and then a solution of a metal compound in a solvent is applied to the outside of the transparent surface corresponding to the bottom. Apply. Then, the open edge of this glass molded body and the open edge of the glass molded body having the same shape as this are respectively heated and softened, and then pressure is applied so that both open edges adhere. After fusion and integration by means of, it is gradually cooled.

Further, a solution of a metal compound dissolved in a solvent is applied to the outside of each light-transmitting surface of a pair of glass moldings having the above-mentioned shape, and then the both are fused and integrated by the same method as described above. By heat-treating after cooling, it is possible to obtain a heat-reflecting glass block having a metal oxide film formed on the outside of both light-transmitting surfaces.

[0007]

[Problems to be solved by the device]

 However, when such a heat ray-reflecting glass block is used as a building exterior material, the metal oxide film formed on the outer side of the light-transmitting surface is exposed to the outside air for a long period of time, and thus it is gradually exposed. The coating film deteriorates, and the heat-reflecting properties of the glass block tend to deteriorate.

In addition, since the heat ray reflective glass block needs to reflect heat rays on its outer surface, the heat ray reflective glass block is constructed so that the surface on which the metal oxide film is formed is located outside the building. The metal oxide film located at is rained, and deterioration is particularly likely to occur.

The present invention has been made in view of the above circumstances, and it is an object of the present invention that there is no or very little deterioration in heat ray reflection characteristics even when used as an exterior material of a building for a long period of time. It is to provide a heat ray reflective glass block.

[0010]

[Means for Solving the Problems]

 The heat-reflecting glass block of the present invention has a hollow box shape, and is characterized in that a metal oxide coating is formed on the inside of at least one of the light-transmitting surfaces.

The metal oxide film in the present invention can be formed by applying a solution of a metal compound dissolved in a solvent to the surface of the glass molded body and then drying the solution.

As the material of the metal compound, metal soap such as naphthenate and octylate, and acetylacetone metal salt are suitable, and the film thickness is 50Å to 1000Å by a spray method or the like. It is desirable to form it.

That is, when the film thickness of the metal oxide film is 50 Å or less, it is difficult to obtain sufficient heat ray reflection characteristics, while when it is 1000 Å or more, variation in film thickness occurs and the appearance quality is likely to be impaired. .

The method for producing the heat ray reflective glass block of the present invention will be described below by taking as an example the method for producing the heat ray reflective glass block in which the metal oxide film is formed on the inside of one light transmitting surface.

First, glass is molded into a box shape having a bottom and no lid, and then a solution of a metal compound in a solvent is immediately applied to the surface corresponding to the inside of the light-transmitting surface. Next, the open edge of the glass molded body and the open edge of the glass molded body having the same shape as this are heated and softened, and then pressure is applied so that the open edges of the two are bonded to each other. After being integrated with each other, it is gradually cooled.

Since the solution of the metal compound dissolved in the solvent is applied at a high temperature to the glass molding, it is dried at the moment of application, and a metal oxide film is formed on the application surface. Become.

[0017]

[Action]

 The heat-reflecting glass block of the present invention has a metal oxide film formed on at least one of the light-transmitting surfaces, and this metal oxide film is not exposed to the outside air. Even if it is used as an exterior material over a long period of time, the heat ray reflection property does not deteriorate.

In the present invention, particularly when a metal oxide film is formed on the inside of both light transmitting surfaces, high heat ray reflection characteristics are obtained.

Further, by forming a metal oxide film also on the outer side of the light transmitting surface, high heat ray reflection characteristics can be obtained. In this case, the metal oxide film formed on the outer side of the light-transmitting surface gradually deteriorates because it is exposed to the outside air, but the metal oxide film formed on the inner side of the light-transmitting surface does not deteriorate. Therefore, the heat ray reflection characteristics of the glass block are extremely low.

[0020]

【Example】

 Hereinafter, the heat ray reflective glass block of the present invention will be described in detail based on embodiments.

Example 1 FIG. 1 is a side sectional view of a heat ray reflective glass block 10 of the present invention.

The heat ray reflective glass block 10 of FIG. 1 has a size of 145 × 145 × 95 mm, has a hollow box shape, and has a film thickness of 250 Å inside both transparent surfaces. Metal oxide coatings 11a and 11b are formed.

The heat ray reflective glass block 10 was manufactured as follows.

First, soda-lime glass was molded into box-shaped glass molded bodies 10a and 10b each having a size of 145 × 145 × 50 mm and an average wall thickness of 8 mm, and had an open bottom, and immediately thereafter. Metal oxide coatings 11a and 11b were formed by applying a solution in which a metal compound was dissolved in a solvent to the surfaces of the glass molded bodies 10a and 10b corresponding to the insides of the light-transmitting surfaces.

The solution used here was prepared by dissolving cobalt naphthenate and nickel naphthenate in an organic solvent, and was applied for 0.5 seconds using a spray.

Next, after heating the open edges of the glass moldings 10a and 10b to soften them, pressure is applied so that the open edges of the glass moldings 10a and 10b are adhered to each other, and they are fused and integrated, and then gradually cooled. Thus, the glass block 10 having the metallic oxide coatings 11a and 11b formed on the light transmitting surface was produced.

The spectral transmittance of the glass block 10 thus manufactured was measured using a spectrophotometer, and the solar transmittance was calculated from the measured value based on JIS-R3106. The value was as low as 17.7%. And it is assumed that it has a good heat ray reflection property.

Example 2 The heat ray reflective glass block 12 of FIG. 2 also has the same size as that of FIG. 1 and has a hollow box shape, which corresponds to the inside of the light-transmitting surface of one glass molded body 12 a. The metal oxide coatings 13a and 13b having a film thickness of 300 Å are formed on the surface to be covered and the surface corresponding to the outside of the light-transmitting surface of the other glass molded body 12b.

The heat ray reflective glass block 12 shown in FIG. 2 corresponds to the inside of the light-transmitting surface of the glass molded body 12a immediately after two glass molded bodies 12a and 12b having the same material and size as those in FIG. 1 are manufactured. The metal oxide coatings 13a and 13b were formed by applying a solution of a metal oxide dissolved in a solvent to the surface to be coated and the surface corresponding to the outside of the light-transmitting surface of the glass molded body 12b.

The solution used here was prepared by dissolving acetylacetone cobalt in an organic solvent, and was applied by spraying for 0.5 seconds.

Next, after heating the open edges of the glass moldings 12a and 12b to soften them, pressure is applied so that the open edges of the glass molded articles 12a and 12b are adhered to each other, and they are fused and integrated, and then gradually cooled. Thus, the glass block 12 having the metal oxide coatings 13a and 13b formed on the translucent surface was produced.

When the solar radiation transmittance of the glass block 12 thus manufactured was determined by the same method as in Example 1, it also showed a low value of 15.1%.

When this glass block 12 was dipped in 1N hydrochloric acid for 48 hours, the metal oxide coating 13b formed on the outer side of the light-transmitting surface was partially peeled off, but on the inner side of the light-transmitting surface. No damage was observed in the formed metal oxide film 13a.

When the heat ray reflective glass block 12 is actually used as a building exterior material, it is constructed so that the surface on which the metal oxide coating 13b is formed is located inside the building.

[0035]

[Effect of device]

 As described above, the heat-reflecting glass block of the present invention has a metal oxide film formed on at least one of the light-transmitting surfaces. It is possible to maintain the heat ray reflection characteristics.

[Brief description of drawings]

FIG. 1 is a side sectional view of a heat ray reflective glass block of the present invention.

FIG. 2 is a side sectional view of a heat ray reflective glass block according to another embodiment of the present invention.

[Explanation of symbols]

 10, 12 Heat ray reflective glass block 11a, 11b, 13a, 13b Metal oxide coating

Claims (1)

[Scope of utility model registration request] 1. A heat ray reflective glass block having a hollow box shape and having a metal oxide coating formed on the inside of at least one light transmitting surface.