JP2007203661A - Translucent heat-reflecting film and cold/hot storage using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive translucent heat-reflecting film which establishes compatibility between the control of visible light transmission and heat reflection and which is excellent in workability and easily handleable, and a cold/hot storage using the translucent heat-reflecting film. <P>SOLUTION: This translucent heat-reflecting film 1 keeps a translucent layer 2, the visible light transmission of which is controlled, and a heat-reflecting layer 3 for reflecting a heat ray overlaying a transparent base film 11. The cold/hot storage, employed for the cold or hot insulation of an article stored in the storage, is provided with a window part which enables the visual recognition of the inside of the storage, the window part has and the film 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a translucent heat ray reflective film having both a semitransparent layer and a heat ray reflective layer, and a cold / warm warehouse in which this is disposed in a window portion.

At least a part of the casing made of transparent material is subjected to half mirror treatment, and lighting means is attached to the inside of the casing, and the inside of the casing is made visible or invisible by turning on and off the lighting means. A half mirror type casing that can be used is disclosed (Patent Document 1).
When this half mirror type casing is applied to, for example, a refrigerator, the inside of the cabinet can be visually recognized by turning on the illumination means without opening the refrigerator door. Moreover, when unnecessary, the illumination means can be turned off so that the inside of the warehouse cannot be seen. Thereby, the frequency | count of opening and closing of a door can be reduced, the change of the internal temperature can be suppressed, and reduction of power consumption can be implement | achieved.

  The half mirror type casing cannot block heat rays from the outside. Therefore, when the said half mirror type casing is applied to a refrigerator, there exists a problem that a heat ray penetrate | invades in a store | warehouse | chamber and the temperature in a store | warehouse | chamber will rise. For this reason, in order to keep the inside of the cabinet cool, it is necessary to cool this temperature increase excessively, and there is a problem that power consumption increases.

Patent Documents 2 and 3 disclose low reflection heat ray reflective glass in which a metal oxide film or the like is laminated on a glass substrate.
However, since the base material of the low reflection heat ray reflective glass is a glass substrate, workability is poor, and attachment to home appliances such as a refrigerator is not easy. For example, there are many problems such as processing into a design that matches the door of the refrigerator, and the glass being heavy and requiring difficult installation work.

Japanese Utility Model Publication No. 5-59390 JP-A-8-48545 JP 7-291669 A

  The present invention has been made in view of such conventional problems, and is compatible with both control of visible light transmittance and heat ray reflection, and is excellent in processability and easy to handle, an inexpensive translucent heat ray reflective film, And it is going to provide the cold storage warehouse using this.

  The first invention is a translucent heat ray reflective film comprising a transparent substrate film and a semitransparent layer with a controlled transmittance of visible light and a heat ray reflective layer that reflects heat rays. (Claim 1).

Next, the effects of the present invention will be described.
The said translucent heat ray reflective film can control the transmittance | permeability of visible light by having the said translucent layer. Therefore, when the opposite side is viewed through the translucent heat ray reflective film, the article or the like may or may not be visible depending on the brightness of the article or the like existing on the opposite side. Therefore, by changing the brightness on the other side of the translucent heat ray reflective film, the visibility of the articles and the like arranged there can be easily adjusted.

Moreover, since the said semi-transparent heat ray reflective film has the said heat ray reflective layer, it can interrupt | block a heat ray. Therefore, heat insulation can be performed by the translucent heat ray reflective film.
Thus, the semi-transparent heat ray reflective film has both the semi-transparent layer and the heat ray reflective layer, so that both visibility adjustment and heat insulation through the semi-transparent heat ray reflective film are easily performed. be able to.

  It is also possible to control the visible light transmittance by increasing the film thickness of the heat ray reflective layer, but since the heat ray reflective layer is usually made of an expensive and easily rusted material such as Ag, the heat ray reflective layer film It is not preferable to increase the thickness. Therefore, a semi-transparent heat ray reflective film having low cost and excellent durability can be obtained by laminating a semi-transparent layer as described above and controlling the transmittance of visible light by the semi-transparent layer.

  Moreover, since the said translucent heat ray reflective film is a film form, while being excellent in workability, it can be easily affixed on a window part etc., and the handling is easy. That is, by being in the form of a film, it can be easily cut into a desired shape, or can be attached to a window or the like in a curved state. In addition, since it is in the form of a film, its weight is small, and handling is easy when performing a sticking operation or the like.

  As described above, according to the present invention, it is possible to provide an inexpensive translucent heat ray reflective film that is compatible with control of visible light transmittance and heat ray reflection, is excellent in workability, and is easy to handle.

2nd invention is the cold storage warehouse for keeping the goods accommodated in a warehouse cold, or keeping warm,
The refrigerated warehouse is provided with a window portion that allows the inside of the warehouse to be visually confirmed, and the window portion is provided with a translucent heat ray reflective film,
The translucent heat ray reflective film is formed by laminating a translucent layer whose transmittance of visible light is controlled and a heat ray reflective layer that reflects heat rays on a transparent substrate film. (Claim 8).

Next, the effects of the present invention will be described.
The said translucent heat ray reflective film can control the transmittance | permeability of visible light by having the said translucent layer. Therefore, by sticking the translucent heat ray reflective film to the window, the article may or may not be visible depending on the brightness of the article present in the cold / hot storage. Therefore, the visibility of the articles in the warehouse can be easily adjusted by changing the brightness in the warehouse.

  Moreover, since the said semi-transparent heat ray reflective film has the said heat ray reflective layer, it can interrupt | block a heat ray. Therefore, by sticking the translucent heat ray reflective film to the window part, it is possible to insulate the inside and outside of the warehouse. Therefore, even if the window part is provided, the temperature rise or temperature drop in the cabinet can be prevented, and the cold insulation or the heat insulation can be efficiently performed.

Thus, when the said semi-transparent heat ray reflective film combines the said semi-transparent layer and the said heat ray reflective layer, both adjustment of the visibility in a warehouse and heat insulation can be performed easily.
Therefore, when you want to see the goods in the warehouse, you can see the goods in the warehouse through the window without opening the door by making the interior bright, and when you do not need to see the interior, By darkening the inside, articles in the warehouse can be hidden, and the appearance design of the cold / hot warehouse can be secured. And even if it has a window part, since the temperature change in a store | warehouse | chamber can be suppressed by said heat insulation effect, power consumption can be suppressed.

  It is also possible to control the visible light transmittance by increasing the film thickness of the heat ray reflective layer, but since the heat ray reflective layer is usually made of an expensive and easily rusted material such as Ag, the heat ray reflective layer film It is not preferable to increase the thickness. Therefore, a semi-transparent heat ray reflective film having low cost and excellent durability can be obtained by laminating a semi-transparent layer as described above and controlling the transmittance of visible light by the semi-transparent layer.

Moreover, since the said translucent heat ray reflective film is a film form, while being excellent in workability, it can be easily affixed on a window part and its handling is easy. That is, by being in the form of a film, it can be easily cut into a desired shape, or can be attached to a window or the like in a curved state. Therefore, the freedom degree of the design of the said cold / warm warehouse can also be raised.
Moreover, since it is a film-form and a weight is small and it can handle it easily when performing a sticking operation | work etc., the said cold storage cabinet can be manufactured easily.

  As described above, according to the present invention, it is possible to provide an easy-to-manufactured refrigerated refrigerator that can adjust the visibility inside the warehouse and can ensure the insulation between the inside and the outside of the warehouse. .

3rd invention is the cold storage warehouse for keeping cold or keeping warm the articles | goods accommodated in a warehouse,
The refrigerated warehouse is provided with a window portion that allows the inside of the chamber to be visually recognized, and a translucent layer that controls the transmittance of visible light is disposed on one surface of the window portion, A heat ray reflective layer that reflects heat rays is disposed on the other surface of the window portion.
The refrigerator of this invention can also adjust the visibility in a store | warehouse | chamber and can ensure the heat insulation with the inside of a store | warehouse | chamber and the exterior.

In the first invention (Invention 1) and the second invention (Invention 8), as the substrate film, for example, a resin film such as a PET (polyethylene terephthalate) film can be used.
Moreover, the translucent heat ray reflective film can adjust the transmittance of visible light to 80% or less, for example, and the reflectance of ultraviolet rays serving as a heat source can be 70% or more.
The visible light transmittance is preferably adjusted between 10% and 70%. If the transmissivity is 10% or less, when the translucent heat ray reflective film is to be seen through, it may be necessary to make the other side extremely bright. On the other hand, if the transmittance is 70% or more, the other side of the translucent heat ray reflective film may become too easy to see due to, for example, indoor lighting at night.

The translucent layer is preferably made of a stainless steel film (claims 2 and 11).
In this case, the visible light transmittance can be easily controlled, and a semi-transparent layer that hardly rusts and has excellent durability can be formed.

Here, in controlling the transmittance of visible light, it is necessary to appropriately adjust the thickness of the semi-transparent layer, the film thickness of the semi-transparent layer made of stainless steel (SUS) film, It is preferable to set it as 5-50 nm. Thereby, the transmittance | permeability of visible light of a semi-transparent heat ray reflective film can be controlled at 80% or less.
In addition, as the translucent layer, a metal film such as titanium, chromium, nichrome, aluminum, copper, tin, or a semiconductor film such as Ge or Si may be used instead of the stainless steel film. By adjusting, a translucent characteristic can be obtained.

The translucent layer is preferably formed by sputtering (claims 3 and 12).
In this case, the translucent layer can be formed uniformly. As a result, the visible light transmittance can be accurately controlled.

The heat ray reflective layer is preferably formed by laminating a first ITO (tin-doped indium oxide) layer, an Ag (silver) layer, and a second ITO layer in this order. Item 13).
In this case, a heat ray reflective layer that can effectively reflect heat rays can be obtained.

  Moreover, it is preferable that the thickness of the said 1st ITO layer and the thickness of the said 2nd ITO layer are 10-50 nm respectively. When the thickness of the first ITO layer or the second ITO layer is less than 10 nm or exceeds 50 nm, the visible light transmittance is lowered due to the optical design of the heat ray reflective layer, and a desired visible light transmittance is obtained. May be difficult.

The thickness of the Ag layer is preferably 1 to 3 nm. When the Ag layer is less than 1 nm, the heat ray reflection effect may be reduced. On the other hand, when the Ag layer exceeds 3 nm, the light transmittance is lowered, so that the visibility may be lowered even when the other side of the film is brightened.
Even when the Ag layer is thickened, by adjusting the thickness of the semitransparent layer as appropriate, for example, a translucent heat ray reflective film having a transmittance of 50% or less at a wavelength of 550 nm can be produced. However, if the Ag layer is made too thick, the Ag layer is likely to rust, and the Ag layer may be too expensive.

The heat ray reflective layer is preferably formed by sputtering (claims 5 and 14).
In this case, the heat ray reflective layer can be formed uniformly. Thereby, the heat ray reflective layer which can reflect a heat ray more effectively can be obtained.

Moreover, you may be comprised by mutually bonding the base film which formed the said heat ray reflective layer into a film, and the base film which formed the said semi-transparent layer (Claim 6, Claim 9).
In this case as well, a semitransparent heat ray reflective film formed by laminating a semitransparent layer and a heat ray reflective layer can be obtained, and both the control of visible light transmittance and heat ray reflection are compatible, and the processability is excellent and handling An easy and inexpensive translucent heat ray reflective film can be provided.

In the first invention (invention 1), the translucent heat ray reflective film is a film disposed in a window portion of a cold / warm storage for keeping cold or warming articles stored in the warehouse. (Claim 7).
In this case, by arranging the heat ray reflective film in the window portion, it is possible to adjust the visibility inside the cold / hot warehouse, and to ensure heat insulation between the inside and the outside of the warehouse. it can.

  In the second invention (invention 8), the cold storage room is, for example, a refrigerator (cool storage box) that cools articles stored in the storage box, a warm storage box (heat storage box) that holds heat, or a cold storage box. And a warm refrigerator having both functions of heat insulation.

Moreover, it is preferable that the said cold / warm warehouse is provided with the illumination means which illuminates the inside of a warehouse (Claim 15).
In this case, it becomes easy to make the articles in the warehouse visible or invisible through the window by changing the brightness in the warehouse using the illumination means. In other words, when you want to see the goods in the warehouse, you can see the goods in the warehouse through the window without opening the door by turning on the illumination means and making the interior bright. When it is not necessary, the illumination means is turned off to darken the inside of the cabinet, thereby making it possible to hide the articles in the warehouse and to ensure the appearance design of the cold / hot warehouse.

Moreover, it is preferable that the said illumination means consists of a light emitting diode (Claim 16).
In this case, the temperature change in the warehouse can be further suppressed. That is, the light-emitting diode (LED) has a narrow emission spectrum half-width, and hardly emits infrared light (heat rays). Therefore, even if the interior is illuminated by the light-emitting diode, the interior temperature is increased. There is no. Therefore, in particular, by adopting a light emitting diode as the illumination means in the refrigerator, a refrigerator with further reduced power consumption can be obtained.

Example 1
A translucent heat ray reflective film according to an embodiment of the present invention and a refrigerator using the same will be described with reference to FIGS. In addition, about drawing which shows the layer structure of semi-transparent heat ray reflective films, such as FIG. 1, the relationship of the thickness of each layer is not considered.
As shown in FIG. 1, the translucent heat ray reflective film 1 of this example includes a translucent layer 2 with a visible light transmittance controlled on a transparent base film 11 and a heat ray reflective layer 3 that reflects heat rays. Laminated.

  The base film 11 is made of a PET film, and the translucent layer 2 is made of a stainless steel (SUS) film formed on the surface of the base film 11 by sputtering. The heat ray reflective layer 3 includes a first ITO (tin-doped indium oxide) layer 31, an Ag layer 32, and a second ITO layer 33 that are sequentially formed on the surface of the translucent layer 2 by sputtering in this order. Laminated.

As shown in FIGS. 4 and 5, the translucent heat ray reflective film 1 can be used by being disposed in the window portion 41 of the refrigerator 4 for keeping the article 40 stored in the refrigerator cold.
That is, the refrigerator 4 of this example is provided with a window portion 41 through which the inside of the refrigerator can be seen, and the window portion 41 is provided with the translucent heat ray reflective film 1. As shown in FIG. 6, the window portion 41 is made of a transparent resin plate 410 such as acrylic, and the translucent heat ray reflective film 1 is adhered to the surface of the transparent resin plate 410. Further, a plurality of white light emitting diodes (LEDs) 42 are arranged on the surface of the transparent resin plate 410 as illumination means for illuminating the interior.
The translucent heat ray reflective film 1 and the light emitting diode 42 may be disposed on either the inside or the outside of the window portion 41, respectively.

Next, an example of the manufacturing method of the translucent heat ray reflective film 1 of this example is demonstrated.
First, a roll-shaped body in which a base film 11 made of a PET film (polyethylene terephthalate film) having a width of 500 mm and a thickness of 50 μm is wound by 500 m is placed in a sputtering apparatus for forming a resin film.

Thereafter, for the purpose of improving the adhesion between the sputtered film to be formed and the base film 11, a vacuum is drawn in the film forming chamber of the sputtering apparatus to a high vacuum of 5 × 10 ⁻⁴ Pa using a turbo molecular pump. To reduce residual gas and moisture in the deposition chamber.
With the sputtering apparatus evacuated to a high vacuum in this manner, the base film 11 is sent out from the roll-like body and sputtered on the surface of the base film 11 while being taken up by a take-up roll.

  First, in forming the translucent layer 2, argon gas is introduced into the film forming chamber at an amount of 200 ml / min, and the base film 11 is operated at a film feed speed of 1.2 m / min. A high voltage of 200 V is applied with a power of 1.5 kW to the SUS target installed as the cathode electrode of the battery. This voltage application can be performed using a pulsed DC (direct current) power source capable of applying a pulse waveform. Thereby, SUS is formed into a film with a thickness of 10 nm on the base film 11. Meanwhile, the semi-transparent layer 2 made of a SUS metal film is formed as the first layer on the base film 11 by winding the base film 11 on a take-up roll.

Next, the heat ray reflective layer 3 composed of three layers is formed.
First, in the heat ray reflective layer 3, the first ITO layer 31 is formed on the translucent layer 2.
Argon gas was introduced into the film formation chamber in an amount of 200 ml / min, and the base film 11 having the semitransparent layer 2 formed into a film and wound in a roll shape as described above was set at a film feed speed of 0.3 m / min. While operating, a high voltage of 350 V is applied at a power of 4.0 kW to the SUS target installed as the cathode electrode in the film formation chamber. This voltage application can be performed using a pulsed DC (direct current) power source capable of applying a pulse waveform, as described above. Thereby, the first ITO layer 31 is formed on the base film 11 with a thickness of 25 nm from above the semitransparent layer 2.

Subsequently, an Ag layer 32 that is an intermediate layer of the heat ray reflective layer 3 including three layers is formed.
In forming the Ag layer 32 as an intermediate layer, argon gas is introduced into the film forming chamber in an amount of 200 ml / min, and the translucent layer 2 and the first ITO layer 31 are formed into a roll shape as described above. While the base film 11 wound up in a film is operated at a film feed speed of 1.2 m / min, the Ag target installed as the cathode electrode in the film forming chamber is set to a high voltage of 350 V with a power of 4.0 kW. Apply voltage. This voltage application can be performed using a pulsed DC power supply, as described above. Thereby, the Ag layer 32 is formed on the base film 11 with a thickness of 2 nm from above the first ITO layer 31.

Subsequently, the second ITO layer 33 which is the uppermost layer of the three heat ray reflective layers is formed.
In forming the second ITO layer 33, argon gas is introduced into the film forming chamber in an amount of 200 ml / min, and the translucent layer 2, the first ITO layer 31, and the Ag layer 32 are formed as described above. The base film 11 wound in a roll shape is operated at a film feed speed of 0.3 m / min, and with an electric power of 4.0 kW with respect to the ITO target installed as the cathode electrode in the film forming chamber. A high voltage of 350V is applied. This voltage application can be performed using a pulsed DC power supply, as described above. Thus, the second ITO layer 33 is formed on the base film 11 with a thickness of 25 nm.

  In this way, as shown in FIG. 1, on the base film 11, a semi-transparent layer 2 made of translucent SUS, a first ITO layer 31, an Ag layer 32, and a second ITO layer 33. The semi-transparent heat ray reflective film 1 of this example is obtained. The translucent heat ray reflective film 1 of this example thus obtained has optical characteristics such that the visible light transmittance is 50% and the reflectance of infrared rays (heat rays) serving as a heat source is 80% or more.

  Moreover, as shown in FIG. 2, FIG. 3, the adhesion layer 12 can also be formed with respect to the semi-transparent heat ray reflective film 1 obtained by performing film-forming as mentioned above. Thereby, the translucent heat ray reflective film 1 can be easily attached to the transparent resin plate 410. In addition, as shown in FIG. 2, FIG. 3, you may give the adhesion layer 12 to any surface of the base film 11 side and the heat ray reflective layer 3 side.

  Then, the translucent heat ray reflective film 1 is attached to a transparent resin plate 410 as shown in FIG. 6, and a light emitting diode 42 is disposed as illumination means. As shown in FIGS. 4 and 5, the window module 411 produced in this way is provided on a part of the door of the refrigerator 4. Thereby, only when the light emitting diode 42 is turned on, the refrigerator 4 configured to be able to see the interior without opening the door is obtained.

Next, the function and effect of this example will be described.
The translucent heat ray reflective film 1 can control the transmittance of visible light by having the translucent layer 2. Therefore, when the opposite side is viewed through the translucent heat ray reflective film 1, the article 40 or the like may or may not be visible depending on the brightness of the article 40 or the like existing on the opposite side. Therefore, by changing the brightness of the translucent heat ray reflective film 1 on the other side, the visibility of the article 40 and the like disposed there can be easily adjusted.

Moreover, since the said semi-transparent heat ray reflective film 1 has the said heat ray reflective layer 3, it can interrupt | block a heat ray. Therefore, heat insulation can be performed by the translucent heat ray reflective film 1.
Thus, since the translucent heat ray reflective film 1 combines the semitransparent layer 2 and the heat ray reflective layer 3, both adjustment of visibility through the translucent heat ray reflective film 1 and heat insulation can be easily performed. It can be carried out.

  Although it is possible to control visible light transmission by increasing the film thickness of the heat ray reflective layer 3, since the heat ray reflective layer 3 is made of Ag (silver) which is expensive and easily rusts, the heat ray reflective layer is used. It is not preferable to increase the thickness of No. 3. Thus, by transposing the semi-transparent layer 2 as described above and controlling the transmittance of visible light by the semi-transparent layer 2, it is possible to obtain the semi-transparent heat ray reflective film 1 which is inexpensive and excellent in durability.

  Moreover, since the translucent heat ray reflective film 1 is a film shape, it is excellent in workability and can be easily attached to the window 41 and the like, and its handling is easy. That is, since it is in the form of a film, it can be easily cut into a desired shape, or can be attached to the window 41 or the like in a curved state. In addition, since it is in the form of a film, its weight is small, and handling is easy when performing a sticking operation or the like.

Moreover, the following effects can be acquired by installing the translucent heat ray reflective film 1 of this example in the window part 41 provided in the refrigerator 4. FIG.
That is, as described above, since the translucent heat ray reflective film 1 can control the transmittance of visible light, the translucent heat ray reflective film 1 is attached to the window portion 41, and is shown in FIGS. 4 and 5. As such, the article 40 may or may not be visible depending on the brightness of the article 40 present in the refrigerator 4. Therefore, the visibility of the article 40 in the warehouse can be easily adjusted by changing the brightness in the warehouse.

  Moreover, since the semi-transparent heat ray reflective film 1 can block heat rays as described above, the semi-transparent heat ray reflective film 1 can be insulated from the inside and the outside of the compartment by sticking the semi-transparent heat ray reflective film 1 to the window portion 41. it can. Therefore, even if the window part 41 is provided, the temperature rise in a store | warehouse | chamber can be prevented and cold insulation can be performed efficiently.

Thus, when the semi-transparent heat ray reflective film 1 has both the semi-transparent layer 2 and the heat ray reflective layer 3, both the visibility adjustment in a warehouse and heat insulation can be performed easily.
Therefore, when it is desired to view the article 40 in the warehouse, as shown in FIG. 5, the interior of the article 40 in the warehouse is opened via the window 41 without opening the door by turning on the light emitting diode 42 to lighten the interior. Can see. Further, when it is not necessary to look inside the cabinet, the articles 40 in the cabinet can be made invisible by turning off the light emitting diodes 42 and darkening the cabinet, and the appearance design of the refrigerator 4 is ensured. Can do. And even if it has the window part 40, since the temperature change in a store | warehouse | chamber can be suppressed by said heat insulation effect, power consumption can be suppressed.

Moreover, since the translucent heat ray reflective film 1 is a film form, it can be easily cut into a desired shape or can be attached to the window portion 41 in a curved state. Therefore, the design freedom of the refrigerator 4 can be increased.
Moreover, since the weight is small because it is film-like and handling is easy when performing a sticking operation | work etc., the said refrigerator 4 can be manufactured easily.

Moreover, since the translucent layer 2 consists of a stainless steel (SUS) film | membrane, the transmittance | permeability of visible light can be controlled easily.
Moreover, since the semi-transparent layer 2 is formed by sputtering, the semi-transparent layer 2 can be formed uniformly, and the visible light transmittance can be accurately controlled.

Moreover, since the heat ray reflective layer 3 is formed by laminating the first ITO layer 31, the Ag layer 32, and the second ITO layer 33 in this order, the heat ray can be effectively reflected.
Moreover, since the heat ray reflective layer 3 is formed by sputtering, the heat ray reflective layer 3 can be formed uniformly, and heat rays can be reflected more effectively.

  Moreover, since the refrigerator 4 is provided with the illumination means (light emitting diode 42) which illuminates the inside of the warehouse, by changing the brightness inside the warehouse using the illumination means, the inside of the warehouse via the window 41 is provided. It is easy to make the article 40 visible or invisible.

  Moreover, since the said illumination means consists of the light emitting diode 42, the temperature change in a store | warehouse | chamber can be suppressed further. That is, unlike the general illumination means such as a tungsten lamp, the light emitting diode 42 has a narrow emission spectrum half width and hardly emits infrared light (heat rays). Even so, it does not raise the temperature in the cabinet. Therefore, by adopting the light emitting diode 42 as the illumination means in the refrigerator 4, the refrigerator 4 with further reduced power consumption can be obtained.

  As described above, according to this example, it is possible to provide an inexpensive translucent heat ray reflective film that is compatible with control of visible light transmittance and heat ray reflection, is excellent in workability, and is easy to handle. Moreover, while being able to adjust the visibility in a store | warehouse | chamber by this, the refrigerator with easy manufacture which can ensure heat insulation with the inside of a store | warehouse | chamber and the outside of a store | warehouse | chamber can be provided.

(Example 2)
This example is an example of the translucent heat ray reflective film 1 in which the heat ray reflective layer 3 is laminated on the base film 11 and the semitransparent layer 2 is provided thereon as shown in FIG. That is, the translucent heat ray reflective film 1 of this example has a layer structure in which the positions of the semitransparent layer 2 and the heat ray reflective layer 3 are reversed with respect to the layer structure shown in Example 1. Others are the same as in the first embodiment.
In the case of this example, since the semitransparent layer 2 made of a stainless steel film can be disposed on the outermost layer, the semitransparent heat ray reflective film 1 which is hard to rust and has excellent durability can be obtained. In addition, the same effects as those of the first embodiment are obtained.

(Example 3)
In this example, as shown in FIGS. 8 to 11, the base film 11 on which the heat ray reflective layer 3 is formed and the base film 110 on which the semitransparent layer 2 is formed are bonded to each other. It is an example of the heat ray reflective film 1.
In producing the translucent heat ray reflective film 1 of this example, first, as shown in FIG. 8, as shown in FIG. 9, the translucent film 101 in which the semitransparent layer 2 is formed on the base film 110, The heat ray reflective film 102 in which the heat ray reflective layer 3 is formed on the surface of the base film 11 is produced.

The formation of the translucent layer 2 on the base film 110 and the formation of the heat ray reflective layer 3 on the base film 11 are performed by the sputtering method shown in Example 1, respectively.
That is, in producing the translucent film 101, stainless steel (SUS) is formed on the surface of the base film 110 by sputtering while the base film 110 is operated in the sputtering apparatus.

In preparing the heat ray reflective film 102, ITO, Ag, and ITO are sequentially formed on the surface of the base film 11 while the base film 11 is operated in the sputtering apparatus.
The evacuation of the sputtering apparatus, the conditions for introducing argon, the film forming conditions for each layer, and the like are the same as those described in the first embodiment.

  And as shown in FIG. 10, the translucent heat ray reflective film 1 is obtained by bonding the translucent film 101 and the heat ray reflective film 102 through the adhesion layer 120. As shown in FIG. With respect to the direction in which the translucent film 101 and the heat ray reflective film 102 are bonded together, the effects of the present invention can be exhibited even if they are bonded in particular. For example, as shown in FIG. 10, the translucent layer 2 of the translucent film 101 and the heat ray reflective layer 3 of the heat ray reflective film 102 may be attached to face each other. And it can comprise so that the adhesion layer 12 can be provided in the surface at the side of the base film 11 of the heat ray reflective film 102, and it can stick to a transparent resin board, transparent glass, etc.

Moreover, as shown in FIG. 11, the base film 11 side of the heat ray reflective film 102 is stuck to the semitransparent layer 2 of the semitransparent film 101 via the adhesive layer 120, and the semitransparent heat ray reflective film 1 is produced. Also good. However, in this case, since the heat ray reflective layer 3 is disposed on the outermost layer, it is desirable to form a coating layer 13 such as a resin on the surface thereof. This is to prevent oxidative corrosion of the Ag layer 32 of the heat ray reflective layer 3.
Others are the same as in the first embodiment.

Also in the case of this example, the semitransparent heat ray reflective film 1 formed by laminating the semitransparent layer 2 and the heat ray reflective layer 3 can be obtained, and both the control of the visible light transmittance and the heat ray reflection are compatible and processed. An inexpensive translucent heat ray reflective film 1 that is excellent in properties and easy to handle can be provided.
In addition, the same effects as those of the first embodiment are obtained.

  In addition, in FIG. 12, an example (S1) of the light transmittance spectrum in the case of the said semi-transparent film 101 alone and an example (S2) of the light transmittance spectrum in the case of the said heat ray reflective film 102 alone are shown. As shown in the figure, at a wavelength of 550 nm, the translucent film 101 has a transmittance of 18%, and the heat ray reflective film 102 has a transmittance of 75%.

  When the translucent film 101 having these light transmittance spectral characteristics and the heat ray reflective film 102 are bonded together, the transmittance at a wavelength of 550 nm is about 14% as shown in FIG. Further, by sticking these two kinds of films, it becomes possible to produce a translucent heat ray reflective film 1 having both functions of light transmittance control and heat ray reflection.

Example 4
In this example, as shown in FIG. 14, the translucent layer 2 is disposed on one surface of the window 41 in the refrigerator, and the heat ray reflective layer 3 is disposed on the other surface of the window 41.
That is, the translucent film 101 (FIG. 8) shown in Example 3 is stuck to one surface of the transparent resin plate 410 constituting the window portion 41 via the adhesive layer 12. In addition, the heat ray reflective film 102 (FIG. 9) shown in Example 3 is attached to the other surface of the transparent resin plate 410 via the adhesive layer 12.
Others are the same as in the first embodiment.
In the case of this example as well, it is possible to provide an easy-to-manufactured refrigerator that can adjust the visibility inside the warehouse and can ensure heat insulation between the inside and the outside of the warehouse.

  In addition, the translucent heat ray reflective film of this invention can also have an electromagnetic shielding function by employ | adopting the layer structure as described in Examples 1-4 mentioned above, for example. That is, the translucent heat ray reflective film can be used as an electromagnetic shielding film for preventing electromagnetic noise by sticking to a treatment room, laboratory wall or window, or precision electronic equipment.

Sectional explanatory drawing of the translucent heat ray reflective film in Example 1. FIG. Sectional explanatory drawing of the translucent heat ray reflective film which provided the adhesion layer in Example 1 in the base film side. Sectional explanatory drawing of the translucent heat ray reflective film which provided the adhesion layer in Example 1 in the heat ray reflective layer side. The perspective view of the refrigerator of Example 1 in the state which turned off the illumination in the store | warehouse | chamber. The perspective view of the refrigerator of Example 1 in the state which turned on the illumination in a warehouse. The perspective view of the window part (window part module) of the refrigerator in Example 1. FIG. Sectional explanatory drawing of the translucent heat ray reflective film in Example 2. FIG. Sectional explanatory drawing of the translucent film in Example 3. FIG. Sectional explanatory drawing of the heat ray reflective film in Example 3. FIG. Sectional explanatory drawing of the translucent heat ray reflective film in Example 3. FIG. Sectional explanatory drawing of the other translucent heat ray reflective film in Example 3. FIG. The diagram which shows an example of each light transmittance spectrum in the case of the semi-transparent film single in Example 3, and a heat ray reflective film single. The diagram which shows an example of the light transmittance spectrum at the time of bonding the translucent film and heat ray reflective film in Example 3. FIG. Sectional explanatory drawing of the window part of the refrigerator which stuck the translucent film | membrane and the heat ray reflective film in Example 4. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Translucent heat ray reflective film 11 Base film 2 Translucent layer 3 Heat ray reflective layer 31 1st ITO layer 32 Ag layer 33 2nd ITO layer 4 Refrigerator 41 Window part 42 Light emitting diode

Claims (16)

  A translucent heat ray reflective film comprising a transparent substrate film and a translucent layer in which the transmittance of visible light is controlled and a heat ray reflective layer that reflects heat rays.   2. The translucent heat ray reflective film according to claim 1, wherein the translucent layer is made of a stainless steel film.   3. The translucent heat ray reflective film according to claim 2, wherein the translucent layer is formed by sputtering.   The translucent heat ray according to any one of claims 1 to 3, wherein the heat ray reflective layer is formed by laminating a first ITO layer, an Ag layer, and a second ITO layer in this order. Reflective film.   The translucent heat ray reflective film according to claim 4, wherein the heat ray reflective layer is formed by sputtering.   In any 1 item | term of Claims 1-5, It is comprised by bonding together the base film which formed the said heat ray reflective layer, and the base film which formed the said semi-transparent layer into a film | membrane. A translucent heat ray reflective film.   The translucent heat ray reflective film according to any one of claims 1 to 6, wherein the translucent heat ray reflective film is a film disposed in a window portion of a cold / warm warehouse for keeping cold or warming articles stored in the warehouse. A cold / hot storage for keeping the goods stored in the storage cold or warm,
The refrigerated warehouse is provided with a window portion that allows the inside of the warehouse to be visually confirmed, and the window portion is provided with a translucent heat ray reflective film,
The translucent heat ray reflective film is formed by laminating a translucent layer whose transmittance of visible light is controlled and a heat ray reflective layer that reflects heat rays on a transparent substrate film. .   9. The translucent heat ray reflective film according to claim 8, wherein the base film on which the heat ray reflective layer is formed and the base film on which the semitransparent layer is formed are bonded to each other. Characterized cold and hot storage. It is a cold and hot storage for keeping cold or warming articles stored in the warehouse,
The refrigerated warehouse is provided with a window portion that allows the inside of the chamber to be visually recognized, and a translucent layer that controls the transmittance of visible light is disposed on one surface of the window portion, A refrigerated / heated warehouse comprising a heat ray reflective layer for reflecting heat rays on the other surface of the window.   11. The cold storage cabinet according to claim 8, wherein the translucent layer is made of a stainless steel film.   The cold storage cabinet according to claim 11, wherein the translucent layer is formed by sputtering.   The cold storage container according to any one of claims 8 to 12, wherein the heat ray reflective layer is formed by laminating a first ITO layer, an Ag layer, and a second ITO layer in this order. .   The cold storage cabinet according to claim 13, wherein the heat ray reflective layer is formed by sputtering.   The cold storage cabinet according to any one of claims 8 to 14, wherein illumination means for illuminating the interior is provided.   16. The cold / hot warehouse according to claim 15, wherein the illumination means comprises a light emitting diode.

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