JPH03187739A - Heat rays masking shield - Google Patents

Abstract

PURPOSE:To obtain a heat rays masking shield moldable in a required shape by forming a gold-deposited layer with a specified mean thickness on one face of a light transmitting thermoplastic resin film and either coating the gold-deposited layer with a light transmitting thermoplastic resin layer or laminating the gold-deposited layer made to a substrate side on a resin substrate without coating. CONSTITUTION:A gold-deposited film 2 is a film of a three-layered structure prepd. by forming a gold-deposited layer 2b on one face of a thermoplastic resin film 2a as a base and coating the gold-deposited layer with a thermoplastic resin layer 2c and it is piled on the surface of a substrate 1 in such a way that the thermoplastic resin layer 2c is on the substrate side and laminated by means of heat pressing etc. The gold-deposited layer 2b of the gold-deposited film 2 is formed so as to obtain a thickness of smaller than 200 Angstrom . If the thickness is 200 Angstrom or thicker, a heat rays masking shield with a quiet color luster can not be obtd. and the total light transmittance decreases and a strong laminate can not be obtd. as fusion between the thermoplastic resin film 2a and the thermoplastic resin layer 2c is obstructed. As the thickness of the gold-deposited layer 2b, if it is too thin, reflection of heat rays becomes insufficient and about 30 Angstrom is needed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a heat ray shielding plate that has both good heat ray shielding properties and appropriate light transmittance.

[Conventional technology]

2. Description of the Related Art Conventionally, a light reflecting film is known in which aluminum is vapor-deposited on one side of a polyethylene terephthalate film. Such a light reflecting film has the advantage that when attached to a window glass or the like using an adhesive, heat rays (near infrared rays) from the outside are reflected by the aluminum vapor deposited layer, thereby suppressing a rise in indoor temperature.

[Problem to be solved by the invention]

However, since the above-mentioned light-reflecting film reflects not only heat rays but also visible light rays with the aluminum vapor deposition layer,
When this film is attached to a window glass or the like, it has a fatal drawback of impairing the lighting and making the room dark. Moreover, this light-reflecting film has the problem of a flashy appearance because it has a glittering metallic luster color unique to aluminum, and the appearance deteriorates as the aluminum vapor deposited layer discolors due to oxidation over time. Ta.

In addition, it is quite troublesome to attach the above-mentioned light-reflecting film to glass etc. with adhesive, and there is a problem that it cannot be attached well to glass with curved surfaces. Because it is easy to enter, it may cause "bubble blistering" or reduce adhesive strength and peel off easily (
There was a problem.

The present invention has been made in view of the above circumstances, and its purpose is to have a calm and elegant color luster, without fear of discoloration, and to have both good heat ray shielding function and appropriate lighting function. Another object of the present invention is to provide a heat ray shielding plate that is easy to manufacture and can be molded into a desired shape.

[Means to solve the problem]

In order to achieve the above object, the heat ray shielding plate of the present invention is provided by forming a dense gold evaporation layer having an average thickness of less than 200 mm and exhibiting a blue color on one side of a translucent thermoplastic resin film; The layer is coated with a translucent thermoplastic resin layer, or is laminated without coating on a translucent thermoplastic resin substrate so that the gold vapor-deposited layer is on the substrate side. .

[For production]

Vapor-deposited gold particles are composed of microscopic gold particles assembled to a size of 50 to 200 particles, and the color tone of the vapor-deposited film varies depending on the particle size and distribution density of the particles, but classification is difficult. Therefore, it is generally expressed as an average film thickness calculated from the amount of vapor deposition. According to this display, when the film thickness is around 50 people, it is pink, when it is around 100 people, it is blue, and when it is around 200 people or more, it is gold. However, the reason why even 30 people can get a blue color and even 100 people can get a golden color is related to particle size and density.

The heat ray shielding plate of the present invention generally exhibits a blue color and uses a region in which particles are distributed in a coarse and dense manner.Since the distribution of particles is coarse and dense, the deposited film material and the substrate material to be laminated are directed toward the deposition surface. Since it can be fused and fixed with or without the presence of a coating material, it is a strong laminate that confines gold particles.

The purpose of covering the vapor deposition surface with a thermoplastic resin layer is to prevent the loss of gold particles during the process of laminating the vapor deposition film to the substrate. Although it is not necessarily necessary depending on the degree of gold adhesion or the lamination processing method, the vapor deposition film Adhesive materials are used for both the substrate and the substrate.

Such a gold vapor-deposited laminate has an elegant blue color, and since the gold vapor-deposited layer does not oxidize over time, there is no fear of discoloration.

Furthermore, since the gold evaporated layer is dense and dense, visible light passes through appropriately and heat rays (near infrared rays) are reflected relatively well, so it can exhibit both appropriate light-taking and heat-shielding functions.

In addition, the gold vapor-deposited film and the thermoplastic resin substrate are tightly adhered to each other, so that "bubbling" does not occur.

Further, since both the gold vapor-deposited film and the substrate of the heat ray shielding plate of the present invention are made of thermoplastic resin, they can be molded into a desired shape using a thermoforming machine.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic sectional view of a heat ray shielding plate according to an embodiment of the present invention, and FIG. 2 is an enlarged partial sectional view thereof. ),
2 shows a gold vapor-deposited film laminated on its surface.

For example, the substrate 1 has a thickness of 1 to 1 with good translucency.
Various transparent thermoplastic resin plates such as polycarbonate resin plates, acrylic resin plates, and polyvinyl chloride resin plates with a thickness of about 10 mm, preferably about 2 to 5 mm are used.

On the other hand, the gold vapor-deposited film 2 is formed by forming a gold vapor-deposited layer 2b on one side of a thermoplastic resin film 2a serving as a base, as shown in FIG.
In A), the film has a three-layer structure in which the gold vapor-deposited layer 2b is covered with a thermoplastic resin layer 2c, and is superimposed on the surface of the substrate 1 with the thermoplastic resin layer 2C facing the substrate side. It is laminated by means such as crimping. Moreover, FIG. 1(B) shows a case where the thermoplastic resin layer 2C is not used.

As the thermoplastic resin film 2a of the gold vapor-deposited film 2, an acrylic resin (including MMA) film with a thickness of about 30 to 200 μm and excellent weather resistance is suitably used. Thermoplastic resin films can be used. Furthermore, the thermoplastic resin layer 2c covering the gold vapor-deposited layer 2b prevents the gold from falling off when the gold vapor-deposited film 2 is laminated onto the substrate 1 and also serves as an adhesive. It is preferable to form the substrate 1 by coating it with a thermoplastic resin such as an acrylic resin or a resin similar to that of the substrate 1, which has good affinity for both the substrate 2a and the substrate 1.

It is of course possible to form the thermoplastic resin layer 2c by laminating an acrylic or vinyl resin film, etc. with a low melting point on the surface of the gold vapor deposited layer 2b instead of coating, but as mentioned above, acrylic resin, etc. In the case of coating, the fluidity of the resin is better than that of laminate, so the resin can sufficiently penetrate between the gold particles of the gold vapor deposited layer 2b, and there is an advantage that a large adhesive strength can be obtained. Moreover, when using a film as the thermoplastic resin layer 2c, especially when using a film thicker than the thermoplastic resin film 2a, the thermoplastic resin film 2a may be laminated so as to be on the substrate side.

The gold vapor-deposited layer 2b of the gold vapor-deposited film 2 needs to be formed to a thickness of less than 200 mm. If the thickness increases to around 200 mm, the gold vapor-deposited layer 2b will exhibit its original golden color, resulting in a subdued color. It becomes impossible to obtain a heat ray shielding plate, and
Since the total light transmittance is considerably reduced, it is not only difficult to exhibit an appropriate lighting function, but also the proportion of the continuous gold layer increases, making it difficult to fuse the thermoplastic resin film 2a and the thermoplastic resin layer 2c. This prevents a strong laminate from being obtained. There is no particular restriction on the lower limit of the thickness of the gold vapor deposited layer 2b, but if it is too thin, the reflection of heat rays will be insufficient, so at least 30 people are required. Gold vapor deposited layer 2
The preferred thickness range of b is 30 to 150, and the even more desirable range is 50 to 100. Within the latter thickness range, the gold vapor deposited layer 2b exhibits a calm blue color and has appropriate translucency. A strong laminate with good heat ray reflectivity can be obtained.

The method of vapor deposition for this gold vapor deposited layer 2b can be roughly divided into vacuum vapor deposition method, ion blating method, sputtering method, etc., and any of them can be used, but it is necessary to make the particle size of the vapor deposited particles fine. If it is large, it will appear golden when viewed from an angle even if the amount of adhesion is small. From this point of view, the latter two are superior.

Further, it is preferable that the gold vapor-deposited layer 2b is distributed in a dense manner as shown in FIG. 2, rather than being formed by densely vapor-depositing gold on the entire one side of the thermoplastic resin film 2a. In this case, it does not matter if the gold is dispersed uniformly or non-uniformly.

In this way, when using the thermoplastic resin layer 2c (
FIG. 2(A)) shows a case where the resin layer 2c is a thermoplastic resin film 2a and a case where the thermoplastic resin layer 2c is not used (a second
In Figures (B) and 2 (C)), there is an advantage that the substrate 1 comes into contact with the thermoplastic resin film 2a, and the adhesive strength is greatly improved, and the transmission of light rays is improved in the non-evaporated portion. This has the advantage of improving lighting performance. Note that FIG. 2(B) shows the laminated state when the substrate 1 has a lower melt viscosity than the thermoplastic resin film 2a, and FIG. 2(C) shows the laminated state when the melt viscosity is higher than that of the thermoplastic resin film 2a.

In some cases, an appropriate amount of a colorant may be added to any of the substrate 1, the thermoplastic resin film 2a, and the thermoplastic resin layer 2c to give the desired color, or an infrared absorber may be included. good. When an infrared absorber is included, heat rays from the outside are not only reflected by the gold vapor deposited layer 2b, but also absorbed by the infrared absorber, which has the advantage of further improving the heat ray blocking function. As the infrared absorber, aminium compounds having a wide effective absorption band in the near infrared region (for example, Japanese Patent Publication No. 43-25335) are preferably used. The concentration of this infrared absorber is approximately 0.2 to 2
It is appropriate to set it in the range of %.

In the heat ray shielding plate of the embodiment shown in FIGS. 1 and 2, the gold vapor-deposited film 2 is laminated only on the upper surface of the substrate 1, but as in the embodiment shown in FIG. Gold vapor-deposited films 2 can be laminated on the upper and lower sides of the film. Alternatively, as shown in FIG. 3(B), a substrate may be used in which a gold vapor-deposited film 2 is laminated on the upper surface and a thermoplastic resin film 3 of the same type as the upper surface containing an infrared absorber is laminated on the lower surface. In this case, in addition to the advantage that the heat ray shielding effect 4 < - increases within the layer, there is an effect of preventing warping of the laminate.

In the heat ray shielding plate of the present invention having the above configuration, since the thickness of the gold vapor deposited layer 2b of the gold vapor deposited film 2 is less than 200,
It has a calm blue color rather than the original gold color, and there is no fear of discoloration because the gold vapor deposited layer 2b is not oxidized over time. Moreover, since the gold particles are dense and the gold vapor deposited layer 2b having less than 200 particles transmits visible light to some extent and reflects heat rays (near infrared rays) relatively well, the heat ray shielding plate of the present invention has an appropriate lighting function. It can also exhibit a relatively good heat ray blocking function.

Therefore, if the heat ray shielding plate of the present invention is used, for example, in place of window glass, it is possible to reflect a considerable amount of heat rays and suppress the rise in indoor temperature without significantly impairing the brightness of the room. It also has the advantage of not losing indoor temperature to the outside, and even when used in place of window glass, it does not have the glaring, flashy appearance that conventional aluminum vapor-deposited films do.

Further, the heat ray shielding plate of the present invention can be easily manufactured by stacking the substrate 1 and the gold vapor deposited film 2 and laminating them using a normal press machine, and the heat ray shielding plate of the present invention laminated in this way can be , gold vapor deposited film 2 and substrate 1
Because it adheres closely, there is no "bubble blistering" and it has high peel resistance. In particular, when the gold vapor-deposited film 2 coated with the thermoplastic resin layer 2c is laminated, a heat ray shielding plate with extremely high He11 resistance can be obtained. Further, in the heat ray shielding plate of the present invention, since both the substrate 1 and the gold vapor-deposited film 2 are made of thermoplastic resin, they can be formed into a desired shape such as a roof plate material or a dome material by thermoforming or the like.

FIG. 4 is a graph showing the total light transmittance of a polycarbonate resin plate and a heat ray shielding plate of the present invention. That is, curve A shows the total light transmittance for injection molded polycarbonate resin plate A with a thickness of 3 mm, and curve B shows the total light transmittance of injection molded polycarbonate resin plate A with a thickness of 3 mm. This figure shows the total light transmittance of the heat ray shielding plate B of the present invention, which is made by laminating a gold vapor-deposited film with a total thickness of about 100 μm formed with a gold vapor-deposited layer of about 80 layers and coated with acrylic resin. , curve C is a gold vapor-deposited film containing an infrared absorber on one side of a 2 mm thick polycarbonate resin plate (a gold vapor-deposited layer of about 80 mm thick on one side of an acrylic resin film containing 0.1% of an aminium-based infrared absorber). 3 shows the total light transmittance of the heat ray shielding plate C of the present invention, which is formed by laminating a gold vapor-deposited film with a total thickness of about 1100 μm coated with an acrylic resin.

Looking at this graph, polycarbonate resin plate A transmits both visible light and near-infrared rays well, while heat ray shielding plates B and C of the present invention have a maximum light transmittance of about 45% in the visible light region. It has moderate translucency at about 37%,
In addition, it can be seen that the light transmittance in the near-infrared region is about 20% and about 7%, respectively, indicating that they have good heat shielding properties. In particular, heat ray shielding@C has excellent heat ray blocking properties because heat rays are doubly blocked by the action of both heat ray reflection by the gold vapor-deposited layer and heat ray absorption by the infrared absorber in the gold vapor-deposited film. I understand.

Moreover, FIG. 5 is a graph showing the results of the heat insulation test, in which the broken line A represents the heat insulation property of the polycarbonate resin plate A, and the broken line B represents the heat insulation property of the heat ray shielding plate B of the present invention. The broken line indicates the heat insulation property of heat ray absorbing plate D (a 100 μm acrylic resin film containing 1% aminium-based infrared absorber is laminated onto a 3 mm thick polycarbonate resin plate). This heat insulation test was carried out using a measuring device as shown in FIG. 150W incandescent light bulb 5 placed in
The test piece 4 is irradiated by the irradiation lamp, and the temperature rise due to the radiant heat of the black steel plate 6 placed 7 cm below the test piece 4 (12.5 cm from the incandescent bulb) is detected by the radiation thermometer 7 directly below it, and the temperature rise is measured over time. It was measured based on the

If you look at the graph in Figure 5, after 12 minutes,
The heat ray shielding board B of the present invention suppresses the temperature rise by about 1005°C more than the polycarbonate resin board A, and by about 2.5°C more than the heat ray absorbing board containing an infrared absorber, and exhibits a good heat insulation effect. I understand that.

〔Effect of the invention〕

As can be understood from the above explanation, the heat ray shielding plate of the present invention has a calm blue color, has no fear of discoloration over a long period of time, and can exhibit a good heat insulation effect without significantly impairing the lighting function. It is easy to manufacture, has high peel resistance, and has remarkable effects such as being able to be molded into a desired shape by thermoforming or the like.

[Brief explanation of drawings]

FIGS. 1(A) and (B) are sectional views showing heat ray shielding plates according to different embodiments of the present invention, and FIG. 2(A) is
and (B) are enlarged partial sectional views of the heat ray shielding plates of FIGS. 1(A) and (B), respectively, and FIG. 2(C) is an enlarged partial sectional view of the heat ray shielding plates according to another embodiment of the present invention. , Figure 3 (A)
and (B) are partially enlarged sectional views showing heat ray shielding plates according to still other embodiments of the present invention, and FIG. 4 is a graph showing the total light transmittance of the polycarbonate resin plate and the heat ray shielding plate of the present invention. , FIG. 5 is a graph showing the results of a heat insulation test conducted on a polycarbonate resin plate, a heat ray absorbing plate, and a heat ray shielding plate of the present invention, and FIG. 6 is a schematic explanatory diagram of the apparatus used for the heat insulation test. 1... Thermoplastic resin substrate, 2... Gold vapor deposited film,
2a... Thermoplastic resin film, 2b... Gold vapor deposited layer, 3... Thermoplastic resin film containing a heat ray absorber.

Claims (2)

[Claims] (1) A dense gold vapor deposited layer with an average thickness of less than 200 Å and a blue color is formed on one side of a translucent thermoplastic resin film, and the gold vapor deposited layer is covered with a translucent thermoplastic resin layer. A heat ray shielding plate that is laminated on a translucent thermoplastic resin substrate without being coated or coated. (2) The heat ray shielding plate according to claim (1), wherein a laminated substrate is used, which is formed by laminating a thermoplastic resin film containing a heat ray absorbent onto a thermoplastic resin substrate.