JPH11216795A - Sheathing heat insulation sheet and sheathing decorative material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a deformation and a strain due to a temperature rise of a sheathing material by preventing a temperature rise even in the case of exposing with a solar light ray even by coloring with a dark color. SOLUTION: The sheathing heat insulation sheet 1 is constituted by laminating a heat insulation layer 4, a dark color decorative layer 3 or a dark color heat insulation layer on a surface of a sheet base material 2. And, the sheet 1 is laminated on a metal base material to form the sheathing decorative material. Thus, even if the sheathing material is received by a heat due to a radiation or transfer in the case of emitting the solar light ray to the sheathing material, the heat insulation layer or the dark color heat insulation layer shuts off the heat to prevent a temperature rise of the metal base material of the sheathing material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative material used as an exterior material for buildings, fittings, vehicles, and the like, and an exterior insulation sheet.

[0002]

2. Description of the Related Art In exterior materials such as metal sashes in cold regions or the like, it has been practiced to make the surface black or nearly dark. Conventionally, when coloring the surface of this type of exterior material (external surface, surface exposed to sunlight) to a dark color such as black, one type represented by black (carbon black) covers the entire band of visible light (band). , Or a wavelength range of electromagnetic waves), a paint containing a low-brightness colorant having high absorption is applied, or a decorative sheet using this colorant is coated.

For reference, FIG. 6 shows the spectral transmittance of a transparent resin layer in which carbon black particles are dispersed. In the figure, "solar infrared light" refers to infrared light contained in sunlight that actually reaches the ground, and specifically refers to electromagnetic waves having a wavelength of 780 to 3000 nm.

[0004]

As can be seen from FIG. 6, the colorant as described above generally has an absorption spectrum whose tail extends to a band before and after visible light, and a solar infrared ray having a wavelength close to visible light. Absorption is large even within the band. As a result, it is inevitably heated to high temperatures by exposure to sunlight. Therefore, for example, in buildings and vehicles, the temperature of the room in the daytime rises too much, or the temperature of the exterior material itself rises, and if you touch it, you get burned, and further, if you accelerate the deterioration of the exterior material itself, The problem I mentioned had arisen.

[0005] In addition, the exterior material rises due to an external temperature rise.
It is deformed and further distorted. For example, in the case of a double-window insulation sash colored black, only the frame on the outdoor side expands due to the rise in surface temperature, and as a result,
There is a problem that the frame of the sash is distorted and cannot be closed. As described above, it is a very important problem to prevent a rise in temperature of the exterior material due to sunlight.

[0006] The present invention has been made in view of the above-described problems.
It is an object of the present invention to provide an exterior heat insulating sheet that can prevent a rise in temperature when exposed to sunlight and an exterior decorative material.

[0007]

Means for Solving the Problems The present invention provides (1) a heat insulating sheet for exterior use, wherein a heat insulating layer and a dark decorative layer are sequentially provided on the surface side of the sheet substrate, and (2) a sheet substrate. (3) The above-mentioned (1) or (1), wherein the exterior heat-insulating sheet is provided with a dark decorative layer on the front side and a heat-insulating layer on the back side of the sheet substrate, and (3) the heat-insulating layer contains hollow beads. (4) The heat insulating sheet for exterior as described in (2), (4) the heat insulating sheet for exterior provided with a dark heat insulating layer provided on the sheet substrate, and (5) the dark heat insulating layer containing hollow beads. Insulation sheet for exterior as described (6)
(7) The exterior decorative material according to the above (6), wherein the thermal insulation layer is provided between the metal base material and the dark decorative layer, (7) the exterior decorative material according to the above (6), wherein the thermal insulation layer contains hollow beads.
(8) An exterior decorative material characterized in that a dark heat insulating layer is provided on a metal substrate, and (9) an external decorative material according to the above (8), wherein the dark heat insulating layer contains hollow beads. It is assumed that.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. As shown in FIG. 1A, the heat insulating sheet for exterior 1 of the present invention has a heat insulating layer 4 and a dark decorative layer 3 sequentially provided on the surface side of a sheet substrate 2. As shown in FIG. 1B, the exterior heat insulating sheet 1 is configured by providing a dark decorative layer 3 on the front side of the sheet base 2 and providing a heat insulating layer 4 on the back side of the sheet base 2. Is also good.

As the sheet substrate 2, paper, paper-like fibrous sheet, resin sheet, film, metal foil and the like are used. Examples of the paper include kraft paper, high-quality paper, coated paper, sulfuric acid paper, glassine paper, parchment paper, and paraffin paper. However, paper can be used inside the window frame,
Only when exposed to sunlight but not to rain like the interior side of a double structure window. Examples of the paper-like fibrous sheet include inorganic fibers such as glass fibers, asbestos, potassium titanate fibers, alumina fibers, silica fibers, and carbon fibers, and woven or nonwoven fabrics using organic resins such as polyester and vinylon. . As the above resin sheet and film,
Polyolefin resin such as polyethylene and polypropylene, polyvinyl chloride, polyvinylidene chloride, ethylene
Vinyl acetate copolymer, vinyl resin such as ethylene-vinyl alcohol copolymer, polyethylene terephthalate,
Polyester resin such as polybutylene terephthalate, polymethyl methacrylate, polymethyl acrylate, acrylic resin such as polyethyl methacrylate, polystyrene,
Acrylonitrile-butadiene-styrene copolymer (A
BS) and a resin film or sheet such as polycarbonate. As the metal foil, aluminum,
Examples include iron, stainless steel, and copper. Among these, the material of the sheet substrate 2 is preferably a polyolefin resin or polyvinyl chloride from the viewpoint of workability and water resistance, and the thickness is preferably about 25 to 100 μm.

The dark decorative layer 3 is composed of (a) a type of low-brightness colorant such as carbon black which has a high absorption in the entire range of visible light (solar infrared absorbing dark decorative layer); (B) A combination of two or more colorants that have an absorption peak only in a part of the wavelength range within the visible light band and have transparency in the entire range of the solar infrared ray and become dark by overlapping. (A dark-colored decorative layer that transmits solar infrared light). The sun-infrared absorbing dark decorative layer is printed or coated with an ink or paint obtained by dispersing a colorant mainly composed of a dark dye or pigment such as carbon black or red iron oxide in a binder resin. Can be formed. The dark-colored decorative layer that transmits solar infrared rays is preferable because the temperature rise due to infrared absorption of the coloring itself can be suppressed.

The dark decorative layer 3 that transmits solar infrared rays is prepared by preparing two or more types of colorants that have transparency in the solar infrared band and have an absorption spectrum peak in a part of the visible light band. By mixing (color mixing) and superimposing the absorption spectrum of each colorant, they are mixed so that the absorption spectrum extends over the entire visible light band. By mixing with a resin (hereinafter sometimes simply referred to as a transparent resin), a dark resin having a dark visual appearance and having no absorption for solar infrared rays was obtained, and was formed using this dark resin. Layer.

Hereinafter, the dark-color decorative layer 3 that transmits the solar infrared ray will be described in detail. For example, FIG.
(C) is a conceptual diagram showing a spectral transmittance of a transparent resin layer in which a yellow pigment, a red pigment, and a blue pigment are dispersed, respectively. By dispersing the mixture of the three kinds of pigments having no absorption in the solar infrared region in the transparent resin layer, the visual appearance is dark as shown in FIG. Thus, a transparent resin layer having a transparent spectral transmittance can be formed. The dark-colored decorative layer 3 that transmits the solar infrared rays has a 70%
It is preferable to design so as to have the above transmittance.

As shown in the conceptual diagrams of FIGS. 7 (a) to 7 (c) or the measured data of FIG.
80 to 780 nm), the absorption peak is present only in a part of the wavelength range, and the entire solar infrared band (wavelengths 780 to 30).
(00 nm) is used. Further, since these colorants are premised on exposure to sunlight, those having sufficient (desired) weather resistance are preferable.

Examples of the coloring agent include graphite, titanium red, red iron oxide, vermilion, cadmium red, phthalocyanine blue, and indus blue. From these dyes or pigments, two or more kinds of combinations are selected so that the absorption spectrum covers the entire visible light band by overlapping the absorption spectrum bands of the colorants. The mixing ratio of the colorant is generally based on the fact that each pigment is roughly equally divided (1: 1: 1 in the case of three types), but depending on the desired dark hue or the mixing characteristics of the colorant. Increase or decrease accordingly. The addition amount of the mixed colorant is usually about 1 to 85% by weight in the resin, and specifically,
When added to the dark-color decorative layer that transmits solar infrared light and formed to a predetermined layer thickness, it preferably has a transmittance of 70% or more in the entire solar infrared band, and has a desired transmittance in the visible light band. The addition amount is increased or decreased so that the color becomes dark. The amount added also depends on the hiding power of the colorant itself.

In the present invention, the term "dark color" refers to a low-color chromatic color such as gray, brown, dark blue, dark green, or rouge, or an achromatic color, in addition to black.
It refers to a color having an absorption spectrum over the entire band of 780 μm. In order to produce a dark color in a dark-colored decorative layer that is transparent to the sun and infrared, instead of a single dark colorant, a plurality of colorants whose absorption spectrum peaks are shifted from each other are mixed together to absorb each colorant. By combining (mixing) the spectra, an absorption spectrum over the entire visible light band is realized. In addition, since each colorant has high transparency in the solar infrared band, it does not absorb sunlight even if mixed. There are at least two or more colorants to be combined, and in the case of two types, colorants having a so-called “complementary color” hue are combined. For example, "green and red". Also, 3
In the case of more than one kind, a hue having a so-called "three primary colors" is selected. For example, there are three types of "yellow, red, and blue", but the point is that when the three types of absorption spectra are combined, it is sufficient to cover the entire band of visible light. It is not always necessary to select three primary colors. Of course, it is also possible to combine four or more types of coloring agents. At that time, if the combined absorption spectrum of the mixed colorant has a partial peak (or dip) in visible light, a dark chromatic color such as dark blue can be produced.

Examples of the resin for forming the dark-color decorative layer 3 having a solar infrared absorbing or solar infrared transmitting property include polymethyl (meth) acrylate, polyethyl (meth) acrylate, polybutyl (meth) acrylate, and methyl (meth) acrylate.
Acrylate / butyl (meth) acrylate copolymer,
Acrylate resins such as homo- or copolymers of alkyl (meth) acrylates such as methyl (meth) acrylate / ethyl (meth) acrylate copolymer (however, (meth) acrylate means acrylate or methacrylate) , Polyethylene terephthalate, thermoplastic polyesters such as ethylene terephthalate / isophthalate copolymer, polyethylene, polypropylene,
Polyolefins such as olefin-based thermoplastic elastomers, fluorine resins such as polyvinyl fluoride, polyvinylidene fluoride, polytetrafluoroethylene, ethylene / tetrafluoroethylene copolymer, polyvinyl chloride, vinyl chloride vinyl acetate copolymer , And polycarbonate. These can be used alone or in combination of two or more.

The heat insulating layer 4 blocks conduction of heat from the outside air and conduction of heat generated in the dark decorative layer 3 by infrared rays (heat rays) of sunlight to prevent a temperature rise of the metal base material. It is provided in. The heat insulating layer 4 may be any layer as long as it can suppress the conduction of heat from the dark decorative layer side to the metal substrate side and the heat transfer due to convection. For example, air is trapped in a closed space in some form. A heat insulating material provided with an air layer is used.

The heat insulating material used for the heat insulating layer 4 is, specifically, a polystyrene foam such as a hollow bead, an extruded polystyrene foam and a beaded polystyrene foam;
Foamed plastic insulation such as rigid polyurethane foam, polyethylene foam, and phenol foam,
Fibrous insulation such as rock wool, glass wool, insulation board, and cellulosic fiber, animal and plant fibers, soft fiber, carbon fiber, and other fibrous insulation such as potassium titanate, calcium silicate, basic Other particles such as magnesium carbonate, diatomaceous earth, diatomaceous earth insulated bricks, refractory insulated bricks, castable refractory insulation, cork, carbon powder, etc. Examples of the heat insulating material include a powder heat insulating material, a multilayer foil heat insulating material, and a heat insulating structural material such as a slate.

Among the heat insulating materials other than the above hollow beads, the rigid polyurethane foam contains a polyol, an isocyanate and a foaming agent as main raw materials. The liquid raw material can be polymerized in a short time and simultaneously foamed and manufactured. In addition, polyethylene foam is obtained by melting polyethylene with an extruded material, mixing and extruding while adding a foaming agent, and cutting a continuously foamed product. There is a block-shaped product and a sheet-shaped product made by mixing a polyethylene with a foaming agent, a cross-linking agent, etc., extruding and melting the product with an extruding agent, and foaming the product. Phenol foam is manufactured by foaming and curing a liquid mixture mainly composed of a resol-type phenolic resin, a foaming agent, and a curing agent, and heat-treating a mixture of a novolak-type phenolic resin, a foaming agent, and a curing agent. There is a construction method to do.

The heat insulating materials other than the above-mentioned hollow beads can be roughly classified into (a) fiber heat insulating materials such as glass wool and rock wool, (b) foamed plastic heat insulating materials, and (c) aluminum foil and air. And any of these can be used to prevent an increase in temperature. However, among the above, (a) is a fibrous material, so it is good to provide it below the dark decorative layer 3 that transmits solar infrared rays as shown in FIG. 1, but it is desirable to form the dark heat insulating layer 5 shown in FIG. 2. In some cases, mixing with a coloring material is unsuitable, and (c) has high performance, but lacks practicality. Therefore, in actual use, (b) is preferable.

Hollow beads are used in the binder resin as the heat insulating material. In the present invention, when hollow beads are used as a heat insulating material, the following (A) to (C)
Is the most preferable. (A) The interior of the hollow beads can be evacuated, and the heat insulation performance is higher than that in the case of using an air layer. (A) When added to a binder, it can be filled at a higher level as compared with a foamed plastic system, and the heat insulating layer can be made thinner and formed into a sheet. (C) In the case of (a), a mixed system with an arbitrary colorant can be used.

The above-mentioned hollow beads are a generic name of a spherical hollow body, and are also called a balloon. Hollow beads include organic,
There is an inorganic type (ceramic type). Ceramic hollow beads are preferable because they have better chemical stability, hardness, pressure resistance and the like than organic hollow beads.

The density of the ceramic hollow beads varies depending on the particle diameter of the sphere, but is about 0.2 to 1.5 g / cm ^3, which is lighter than other inorganic fillers. Also,
The ceramic hollow beads may be those using sodium silicate glass as a raw material, but are preferably multi-component glasses such as aluminum silicate glass and sodium borosilicate glass from the viewpoint of good water resistance. In addition, as the ceramic hollow beads, those using natural volcanic glass materials such as shirasu and obsidian may be used. In the case where the ceramic hollow beads are formed of a multi-component glass, the partition walls are set to 0.1 mm.
It has a thickness of 5 to 2 μm, has a structure in which the inside is isolated from the outside air, and has a clean spherical shape.

The particle diameter of the hollow beads ranges from 1 μm or less to several hundred μm, but is preferably 100 μm or less (average particle diameter) in order to highly fill the binder resin. The amount of the hollow beads to be added is such that the higher the filling in the binder resin, the more the heat insulating performance is improved.
It is preferable to fill 50 parts by weight or more with respect to 0 parts by weight. In this case, the thickness of the heat insulating layer 4 varies depending on the filling ratio of the hollow beads, but is preferably formed to be about 5 μm to 500 μm.

The hollow beads have been subjected to a surface treatment with a silane coupling agent such as γ-methacryloxypropyltrimethoxysilane, γ-aminopropyltriethoxysilane, and γ-glycidoxypropyltrimethoxysilane. May be. By using the silane coupling agent according to the type of the resin binder, effects such as improvement of the filling rate of the hollow beads with respect to the binder and improvement of the strength of the heat insulating layer can be obtained.

As the binder resin of the heat insulating layer 4, the resin exemplified as the resin forming the dark decorative layer can be used, and for example, an opaque resin based on an emulsion can be used. In addition, acrylic emulsions and modified acrylic emulsions are widely used for exterior applications, and have the advantage that they can be filled with fillers such as hollow beads at a high level.

The layer of the dark decorative layer 3 on the sheet substrate 2 or the metal substrate 7 may be coated over the entire surface or may be partially coated such as a pattern. As a method of laminating the dark-colored decorative layer 3, in the case of full-surface coating, for example, coating by various known coating methods such as spray coating, curtain flow coating, roll coating, comma coating, brush coating, or a sheet formed in advance. (Or a film) by heat bonding and lamination using a known bonding method such as dry lamination with an adhesive.
The thickness of the dark makeup layer 3 is usually about 1 to 200 μm,
In particular, when weather resistance is required, the thickness is preferably 50 μm or more.

In order to further improve the weather resistance of the exterior heat insulating sheet 1, an ultraviolet absorber may be added to the dark decorative layer 3. When the dark-colored decorative layer 3 is transparent to solar infrared, the ultraviolet absorber absorbs ultraviolet light, but at least in the solar infrared band, so as not to impair both the transmission of solar infrared and the reproduction of dark colors. A resin having transparency, more preferably a resin having transparency in both the solar infrared and visible light bands is selected. In the visible light band, even an ultraviolet absorber having absorption (coloring) can be used as long as it does not interfere with color reproduction of a dark color.

Specifically, an ultraviolet absorber such as a benzotriazole-based, benzophenone-based, benzoate-based, or cyanoacrylate-based ultraviolet absorber is used. In addition to the ultraviolet absorber, a light stabilizer such as a hindered amine radical scavenger may be added. The addition amount of both the ultraviolet absorber and the light stabilizer is 0.1 to 10 parts by weight based on 100 parts by weight of the resin.

The exterior heat insulating sheet 1 can be provided with a decorative layer or a concavo-convex pattern as required. The decorative layer may be any position such as the front surface or the back surface of the dark decorative layer 3 or the front surface or the back surface of the sheet substrate, as long as it is visible from the front surface. Examples of the decorative layer include a printed pattern layer and a metal thin film layer. The concavo-convex pattern forms a concavo-convex shape such as a pear cloth, a hairline, and a wood grain conduit using a known embossing method.

FIG. 2 is a sectional view showing another example of the exterior heat insulating sheet. As shown in FIG.
The dark heat insulating layer 5 may be laminated on the surface side of the sheet substrate 2. The dark heat insulating layer 5 is a layer having both the function of the dark decorative layer 3 and the function of the heat insulating layer 4 shown in FIG. The dark-color heat-insulating layer 5 is, specifically, a binder comprising the heat-insulating material used for the above-described heat-insulating layer and the colorant used for the solar-infrared-absorbing dark-colored decorative layer or the colorant used for the solar-infrared-transmitting dark-colored decorative layer. It is formed by dispersing in resin. As the heat insulating material, the colorant, the binder resin, and the like of the dark heat insulating layer 5, the materials described in the description of the dark decorative layer 3 and the heat insulating layer 4 can be used.

As shown in FIG. 5, the exterior decorative material 6 includes the dark decorative layer 3 and the heat insulating layer 4 shown in FIGS. 1 (a) and 1 (b).
Can be manufactured by laminating and integrating the exterior decorative sheet 1, which is obtained by laminating the above on the sheet base 2, with the metal base 7 via the adhesive layer 8 or the like. Although not shown, the exterior decorative material may be formed by laminating and integrating the exterior heat insulating sheet 1 obtained by laminating the above-described dark heat insulating layer 5 of FIG. 2 on the sheet substrate 2 via an adhesive layer or the like. it can. The exterior decorative material 6 may be manufactured by directly forming the dark decorative layer 3, the heat insulating layer 4, the dark heat insulating layer 5, and the like on the surface of the metal base 7 without using the external heat insulating sheet.

FIG. 3 and FIG. 4 are cross-sectional views showing an example of the case where the decorative material for exterior use of the present invention is formed directly on a metal substrate. As shown in FIG. 3, the exterior decorative material 6 is formed by laminating a heat insulating layer 4 and a dark decorative layer 3 on the surface side of a metal base 7, and the heat insulating layer 4 is formed by the dark decorative layer 3 and the metal base 7. And is located between. In addition, as shown in FIG.
The dark heat insulating layer 5 may be laminated on the surface side of the metal base 7.

As the metal substrate 7, those commonly used in exterior materials can be used, and specifically, aluminum alloys such as aluminum or duralumin, iron alloys such as iron or stainless steel, titanium, gold, silver, copper, and the like. Metals such as brass are exemplified. Examples of the shape of the metal material include a plate shape such as a flat plate and a curved plate, a columnar body such as a square pole and a cylinder, a sheet, various three-dimensional shapes, and the like.

The metal substrate 7 preferably has a high reflectance in a solar infrared band which causes a rise in temperature upon exposure to sunlight. For example, the above-mentioned iron, stainless steel, titanium, and the like are used, but those having a reflectance of 60% or more in the entire solar infrared band are selected. Specifically, aluminum, gold, silver, and metals such as brass, or only the surface of the substrate of any material, these metals, titanium dioxide, barium sulfate, and solar infrared reflective substances such as zinc white One in which a layer (infrared reflective layer) is formed is exemplified. However, when solar infrared is absorbed by a layer on the surface side of a metal base such as a dark decorative layer, a dark heat insulating layer, a heat insulating layer, and a sheet base, a metal base having a high solar infrared reflectance is not necessarily required. It is not necessary to use it.

As a method for forming the infrared reflective layer, a paint in which foil pieces or powders of these materials are dispersed is applied, or in the case of a metal in particular, foil bonding, vacuum deposition, sputtering, electrolysis, or non-coating. There is a thin film forming method such as electrolytic plating. Examples of the base material of any of the above-mentioned materials include metals, wood, ceramics, glass, resins, and laminates thereof other than those described above.

The heat insulating sheet for exterior and the decorative material for exterior of the present invention are used for surface materials of buildings such as roofs and outer walls, doors, and the like.
Windows, doors and other fittings, sashes, curtain walls, exteriors, doors, fences, partitions, terraces, gates, gateposts, lattices, roof decks, and exterior materials such as building members such as balconies.

[0038]

EXAMPLE 1 A mixed color ink (dark ink) was prepared by mixing inks A, B, and C shown below in a mixing ratio of 3: 3: 1 to prepare a transparent biaxially stretched PET film. After performing a corona discharge treatment on the (thickness: 25 μm), a 5 μm thickness (when dry) was applied by a roll coating method to provide a dark-colored decorative layer having solar infrared transmittance. Further, in order to impart weather resistance, an acrylic resin-based coating agent was applied on the dark-colored decorative layer to a thickness of 10 μm (when dry) by a roll coating method to provide a protective layer. Further, on the back surface of the film, a coating material containing 200 parts by weight of glass hollow beads (bead filling rate: 60%) with respect to 100 parts by weight of an acrylic emulsion binder (trade name "Thermoshield" of Nagashima Special Paint Co., Ltd.) Is 10 μm (at the time of drying) by a roll coating method.
To form a heat insulating layer to obtain a heat insulating sheet for exterior use. The exterior heat insulating sheet was laminated on an aluminum plate (2 mm thick) via an acrylic adhesive to obtain an exterior decorative material.

A: An 8: 2 weight ratio mixed resin of an acrylic resin and a vinyl chloride-vinyl acetate copolymer is used as a transparent resin which transmits solar infrared rays (binder), and contains 52% by weight of quinacridone as a coloring agent. Red-based ink. B: A yellow ink containing 38% by weight of isoindolinone as a coloring agent in the binder. C: A blue ink comprising the above binder and 82% by weight of phthalocyanine blue as a coloring agent.

Example 2 An exterior heat insulating sheet and an exterior decorative material were obtained in the same manner as in Example 1 except that the thickness of the heat insulating layer was 30 μm.

Example 3 Example 3 was repeated except that the thickness of the dark decorative layer was changed to 10 μm.
By operating in the same manner as in Example 2, an exterior heat insulating sheet and an exterior decorative material were obtained.

Example 4 On the transparent biaxially stretched PET, the heat insulating paint 100 of Example 1 was placed.
A part obtained by adding 30 parts by weight of the dark ink of Example 1 to parts by weight was applied to a thickness of 20 μm (when dried) by a roll coating method to form a dark heat insulating layer to obtain a heat insulating sheet for exterior use.
The sheet was laminated on an aluminum plate (2 mm thick) via an acrylic adhesive to obtain a decorative material for exterior use.

Comparative Example 1 A black ink in which only a black pigment was blended in an aluminum plate (82% by weight of carbon black in the binder)
Was directly coated to obtain an exterior decorative material.

Comparative Example 2 An exterior decorative sheet and an exterior decorative material were obtained in the same manner as in Example 1 except that the heat insulating layer was not formed.

FIG. 8 shows the spectral transmittance of each sheet obtained by applying the monochromatic inks A, B and C of Example 1 to a PET film. FIG. 9 shows the spectral transmittance of the decorative sheet for exterior of Example 1. FIG. 10 shows the spectral reflectance of the decorative material for exterior of Example 1 and the aluminum plate. Although not shown, the black ink of Comparative Example 1 was made of PET for comparison.
When a sheet coated on the film was prepared and the spectral transmittance of the sheet was measured, it was the same as that shown in FIG.

The exterior decorative materials and aluminum plates of Examples 1 to 4 and Comparative Examples 1 and 2 were placed in Miyoshi-cho, Iruma-gun, Saitama Prefecture on a clear day in early June from 11:00 to 15:00. It was exposed outdoors and the temperature rise at that time was measured with a surface thermometer. Table 1 shows the measurement results. Examples 1-4
The concealing properties of the exterior decorative materials of Comparative Examples 1 and 2 were all good as a result of visual observation.

[0047]

[Table 1]

From the results shown in Table 1, it can be seen that the decorative materials of Examples 1 to 4 all have lower temperature rise rates than the decorative materials of Comparative Examples 1 and 2.

[0049]

The heat insulating sheet for exterior and the decorative material for exterior of the present invention are as follows:
1 and FIG. 5 have a heat insulating layer, which prevents conduction heat and radiant heat from the outside air, and irradiates the (a) solar-infrared-absorbing dark makeup layer with sunlight. Even if heat is generated, it is possible to absorb the heat. Furthermore, when the above-mentioned (b) solar-infrared-transparent dark-colored decorative layer is used as the dark-colored decorative layer, heat generation from the dark-colored decorative layer itself can be prevented, and furthermore, the influence of heat of the exterior material can be prevented.

The exterior heat insulating sheet and the exterior decorative material adopting the structure shown in FIG.
(A) When a dark pigment having a solar infrared absorption property is added, heat is generated in the dark color layer itself, but radiant heat from outside air, conduction heat, and the like can be prevented. Further, when the dark color heat-insulating layer is added with (b) a dark pigment that transmits solar infrared rays, heat generation of the dark color layer itself, radiant heat from the outside, conduction heat, and the like are prevented. The heat insulating effect is obtained regardless of whether the dark layer or the dark pigment of the dark heat insulating layer absorbs solar infrared rays.
The configuration in which the heat insulating layer 4 and the dark makeup layer 3 are separately provided is better than the configuration in which the is provided.

[0051]

Since the exterior heat insulating sheet of the present invention has a dark decorative layer and a heat insulating layer or a dark heat insulating layer, a dark color layer can be formed only by sticking it to the surface of the metal base material of the external material. At the same time, even if the exterior material receives heat due to radiation or conduction when irradiated with sunlight, the heat insulating layer or the dark color heat insulating layer blocks the heat, and the temperature rise of the metal base material of the exterior material can be prevented well. .

The exterior decorative material of the present invention employs a structure in which the heat insulating layer is provided between the metal substrate and the dark decorative layer, or the heat insulating decorative layer is provided on the surface of the metal substrate. Thus, when the metal base receives heat from radiation or conduction from the outside, the heat insulating layer or the dark heat insulating layer shields the heat, and the temperature rise of the metal base of the exterior material can be favorably prevented.

As described above, according to the present invention, since the temperature rise of the metal base material can be prevented, the metal base material of the exterior decorative material can be prevented from being deformed or distorted by heat, has a long-term shape stability, and can be in contact with the human body. Excellent safety in case of

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of an exterior heat insulating sheet.

FIG. 2 is a sectional view showing another example of the exterior heat insulating sheet.

FIG. 3 is a cross-sectional view showing an example of an exterior heat insulating material.

FIG. 4 is a cross-sectional view showing another example of the exterior heat insulating material.

FIG. 5 is a sectional view showing another example of the exterior heat insulating material.

FIG. 6 is a graph showing a conceptual diagram of a spectral transmittance of a transparent resin layer in which carbon black particles are dispersed.

FIG. 7 is a graph for explaining the principle of producing a dark resin whose visual appearance is dark and transparent to solar infrared rays.

FIG. 8 is a graph showing the spectral transmittance of each of the sheets coated with three types of inks A to C of Example 1.

FIG. 9 is a graph showing the spectral transmittance of the exterior heat insulating sheet of Example 1.

FIG. 10 is a graph showing a spectral reflectance of an exterior decorative material of Example 1 and a spectral reflectance of an aluminum plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Exterior heat insulating sheet 2 Sheet base material 3 Dark makeup layer 4 Heat insulation layer 5 Dark heat insulation layer 6 Exterior makeup material 7 Metal base material

Claims (9)

[Claims] 1. An exterior heat-insulating sheet comprising a heat-insulating layer and a dark-colored decorative layer sequentially provided on the surface side of a sheet substrate. 2. An exterior heat-insulating sheet, characterized in that a dark-colored decorative layer is provided on the front side of the sheet base material and a heat insulating layer is provided on the back side of the sheet base material. 3. The heat insulating sheet for exterior use according to claim 1, wherein the heat insulating layer contains hollow beads. 4. An exterior heat-insulating sheet, characterized in that a dark heat-insulating layer is provided on a sheet substrate. 5. The heat insulating sheet for exterior use according to claim 4, wherein the dark heat insulating layer contains hollow beads. 6. An exterior decorative material comprising a heat insulating layer provided between a metal substrate and a dark decorative layer. 7. The exterior decorative material according to claim 6, wherein the heat insulating layer contains hollow beads. 8. An exterior decorative material comprising a metal substrate provided with a dark heat insulating layer. 9. The exterior decorative material according to claim 8, wherein the dark heat insulating layer contains hollow beads.