JP2002012679A - Heat insulating colored film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulating colored film having excellent heat insulating property and also having color and/or hue required for obtaining an intended fine appearance. SOLUTION: This heat insulating colored film is obtained by forming a composition comprising a mixed pigment and a thermoplastic resin into a film; wherein the mixed pigment is a combination of two or more primary pigments selected from the group consisting of a white pigment having >=40% solar reflectivity at 780-2,100 mm wavelength, a blue pigment having >=7% solar reflectivity at 780-2,100 mm wavelength, a red pigment having >=8% solar reflectivity at 780-2,100 mm wavelength, a green pigment having >=7% solar reflectivity at 780-2,100 mm wavelength, a yellow pigment having >=10% solar reflectivity at 780-2,100 mm wavelength and a black pigment having >=6% solar reflectivity at 780-2,100 mm wavelength.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the roofs and outer walls of buildings, such as factories and houses, the roofs and outer walls of transport vehicles such as containers and refrigerated vehicles, and the roofs and outer walls of ships, plants, sheds, and barns. The present invention relates to a heat-shielding color film that can prevent an increase in internal temperature due to sunlight irradiation, and can also improve the design and aesthetic appearance by applying the present invention. The heat-insulating color film of the present invention can be applied to an outdoor extension film used for covering facilities, horticulture and the like.

[0002]

2. Description of the Related Art Buildings and their roofs and skins are usually exposed to the weather and sunlight, and are liable to be deteriorated. However, in recent years, a method has been practiced in which, in order to improve workability, a color film corresponding to the intended use is prepared in advance, and the same effect as that obtained by coating with a paint is easily obtained by disposing the color film. Buildings such as houses are constantly exposed to sunlight, so in summer, in particular, films that have the effect of suppressing an increase in the internal temperature are used to improve the livability, and cooling such as air conditioning for temperature adjustment is used. It is preferable to use a film having a high heat-shielding effect also for cost reduction. In recent years, containers and refrigerating vehicles have been widely used for transportation under low temperature conditions due to distribution innovation, but a film having high heat shielding properties has been demanded in order to enhance the freezing / cooling effect. In the field of outdoor stretch films used for covering facilities, horticulture, and the like, the situation is similar except that transparency is required. As described above, heat shielding properties are required, and in recent years, buildings, vehicle bodies, facilities, and the like have been given various colors to improve aesthetic appearance.

[0003] Techniques for providing a film having heat shielding properties have been studied for a long time, for example, Japanese Patent Publication No. 59-133.
No. 25 discloses a technique for depositing a thin metal layer on a film surface, and Japanese Patent Application Laid-Open No. Hei 7-27438 discloses a technique using a hologram in combination with a film. As a kneading method, Japanese Patent Publication No. 4-45546 discloses a method of obtaining heat shielding properties by using a near-infrared absorbing dye. However, in such a method, since the film itself absorbs heat, the heat dissipation after that results in poor heat insulation.

JP-A-8-81567 discloses a heat shield sheet containing a specific amount of an aminium-based compound or a diimmonium-based compound with respect to a plastic resin. However, this heat-shielding sheet essentially transmits visible light and has a high near-infrared absorptivity, and is suitable for applications such as pressure-sensitive adhesive sheets, printing sheets, outdoor marking films, and the like. It is unsuitable for applications that require heat and need to be colored to impart aesthetics. JP-A-10-250002 discloses that
An outdoor stretching film having improved heat shielding properties by providing a layer containing metal-doped inorganic oxide fine particles on one surface of a thermoplastic resin film and further providing a layer containing hydrophilic inorganic colloid particles is disclosed. ing. However, this should also be applied to applications that require transparency, and could not be applied to applications that require reliable heat shielding and coloring at the same time.

[0005]

SUMMARY OF THE INVENTION In view of the above situation, the present invention provides a heat-shielding color film having excellent heat-shielding properties and, at the same time, having colors and hues necessary for obtaining an intended aesthetic appearance. It is intended to do so.

[0006]

The present invention is a heat-shielding color film obtained by molding a composition containing a mixed pigment and a thermoplastic resin into a film, wherein the mixed pigment has a thickness of 780 to 2100 nm. A white pigment having a solar reflectance of 40% or more in a wavelength range of, a blue pigment having a solar reflectance of 7% or more in a wavelength range of 780 to 2100 nm,
The solar reflectance in the wavelength range of 780 to 2100 nm is 8
%, A green pigment having a solar reflectance of 7% or more in a wavelength range of 780 to 2100 nm, 780
Two or more primary colors selected from the group consisting of a yellow pigment having a solar reflectance of 10% or more in a wavelength range of ２2100 nm and a black pigment having a solar reflectance of 6% or more in a wavelength range of 780 to 2100 nm. A heat-shielding color film comprising a combination of pigments.

[0007] The present invention is also a heat-insulating color film, wherein the heat-insulating color film contains 0.1 to 10% by weight of glass beads. The present invention is also a heat-insulating color film, wherein the heat-insulating color film is provided with an adhesive layer on one surface. Hereinafter, the present invention will be described in detail.

In the present invention, a composition containing a mixed pigment and a thermoplastic resin is used. The mixed pigment is a combination of a plurality of primary color pigments having a specific range of solar reflectance. In the present specification, the `` solar reflectance '' of a pigment is measured by measuring a film-like material obtained by molding a composition containing the pigment and a thermoplastic resin under the same conditions into a film-like shape. , The resulting solar reflectance. The meaning of the term “solar reflectance” is described in JIS A 5759, in which the wavelength range is 350 to 2100 mm. In the present specification, “solar reflectance” is 780 to 2100 nm of sunlight.
Means the reflectance weighted by the intensity for each wavelength in the wavelength range.

The above-mentioned mixed pigment is a primary color pigment of a white pigment, a blue pigment, a red pigment, a green pigment, a yellow pigment and a black pigment, and can be obtained by combining the above-mentioned primary color pigments having a constant solar reflectance. Things.

[0010] If the solar reflectance of the white pigment is at least 40%, the effects of the present invention can be obtained, but it is preferably at least 50%. The solar reflectance of the blue pigment is
If it is 7% or more, the effects of the present invention can be obtained, but preferably 10% or more. If the solar reflectance of the red pigment is 8% or more, the effects of the present invention can be achieved, but it is preferably 15% or more, and more preferably 20% or more.

The above-described green pigment can exhibit the effects of the present invention if the solar reflectance is 7% or more, but is preferably 10% or more. The solar reflectance of the yellow pigment is 1
If it is 0% or more, the effects of the present invention can be obtained, but preferably 20% or more, more preferably 25% or more.
%, More preferably 30% or more. If the solar reflectance of the black pigment is 6% or more, the effects of the present invention can be obtained, but it is preferably 10% or more.

The above-mentioned mixed pigment is characterized in that it is toned by combining two or more kinds of primary color pigments whose solar reflectance is within a certain range as described above. There has not been a technique for improving the heat shielding property using a pigment having a reflectance within a certain range, and the present inventors have conceived for the first time. Here, the primary color pigment is a pigment capable of producing a color film having all colors and hues by using the pigment described here.

The term “combination” means, for example, an operation of obtaining a specific color or hue by mixing. By mixing the primary color pigments, various colors and hues different from the colors and hues expressed by these primary color pigments are obtained. By combining the primary color pigments having the solar reflectance of these, various colors and hues different from these primary colors are obtained, and there is no technique for toning a mixed pigment by this, and the present inventors have for the first time. That is what I found.

By changing the type and amount of the primary color pigments used, the mixed pigments are, for example, gray, blue, green, ivory, orange, medium-color brown, wine red, and dark-color. Since almost all possible types of hues, lightness and saturation such as red rust, dark green, dark blue and black brown can be obtained, the degree of freedom in toning is dramatically increased.

[0015] Examples of the primary color pigments used in the mixed pigment include the following pigments. Examples of the white pigment include titanium CR97 (manufactured by Ishihara Titanium Industry Co., Ltd.), which is a titanium oxide. As a black pigment,
Fastogen Super Black MX (manufactured by Dainippon Ink and Chemicals, Inc.), Paliogen Schwar
z S0084 (manufactured by BASF), Palio Tol Black L0080 (manufactured by BASF) and the like, and furthermore, Symler Fast Yellow.
4192 (manufactured by Dainippon Ink and Chemicals) and Fast Gen Red 7100Y (manufactured by Dainippon Ink and Chemicals)
And Lionol Blue FG7908 (manufactured by Dainichi Seika Kogyo Co., Ltd.).

As the blue pigment, Fastogen B
lu 5485 (manufactured by Dainippon Ink and Chemicals, Inc.), Fa
stogen Blue RS (manufactured by Dainippon Ink and Chemicals, Inc.), Cyanine Blue 5240 KB (manufactured by Dainichi Seika Kogyo) and the like. As a red pigment, Fa
stogen Super Magenta RH (manufactured by Dainippon Ink and Chemicals, Inc.), Fastogen Red
7100Y (manufactured by Dainippon Ink and Chemicals, Inc.) and Rubicron Red 400RG (manufactured by Dainippon Ink and Chemicals, Inc.).

As a yellow pigment, Symler Fa
st Yellow 4192 (manufactured by Dainippon Ink and Chemicals, Inc.), Chico Pearl Yellow L-1110 (BASF
And the like). Examples of the green pigment include Fast Gen Green 2YK (manufactured by Dainippon Ink and Chemicals, Inc.) and Lionol Green 6YKP-N (manufactured by Toyo Ink Manufacturing Co., Ltd.).

Each of the primary color pigments falls within the above-mentioned range of the above-mentioned constant solar reflectance, and thus can be sufficiently used as a primary color pigment of the mixed pigment. The primary color pigments are those in which a color film obtained using the pigments of each color exhibits a primary color corresponding to each color, and the La required for each color.
It has a b value. For example, white pigment is Lab9
6.2 / -0.6 / 1.9 and the blue pigment is La
b13 / 14 / -31 and the red pigment is Lab3
2/46/15 and the green pigment is Lab18 /-
Has a value of 2/0 and the yellow pigment is Lab69 / -3 / 44
And the black pigment has a value of Lab12 / 2 / -1.

The heat-shielding color film of the present invention is obtained, for example, by melt-kneading the mixed pigment and a thermoplastic resin to obtain a composition, which is formed into a film by a calendering machine, a T-die extruder or the like. To obtain a film-like material. The composition may contain other components as long as it contains the mixed pigment and the thermoplastic resin. Examples of the other components include a brilliant material, a filler, and an additive. Can be mentioned.

As the above-mentioned thermoplastic resin, a resin which is usually used as a main component for forming a film can be used, and is not particularly limited. Examples thereof include a vinyl chloride resin, a vinylidene chloride resin, and a polyethylene resin. Resin, polypropylene resin, (meth) acrylic resin, (meth) acrylate resin, polyester resin, polystyrene resin, acrylonitrile-butadiene-styrene copolymer resin, acrylonitrile
Styrene copolymer resins, polycarbonate resins and the like can be mentioned. Of these, vinyl chloride resin and (meth) acrylate resin are preferable. These thermoplastic resins may be used alone,
Two or more kinds may be used in combination.

[0021] The composition may optionally contain a glittering material. Examples of the glittering material include mica, aluminum foil, tin foil, gold foil, silver foil, titanium gold foil, stainless steel foil, and metal foil such as nickel and copper.

The above composition may be used, if necessary, in the form of fine particles.
It may contain a filler. As the above particulate filler
Is not particularly limited, for example, SiO 2_Two, TiO_Two, A
l_TwoO _Three, Cr_TwoO_Three, ZrO_Two, Al_TwoO_Three・ SiO
_Two, 3Al_TwoO_Three・ 2SiO_Two, Zirconia silicate,
Fine particles of lamic beads, fibrous or granular fine particles
Fine glass, glass beads, and the like can be given. the above
The fine particle may be any of a particle, a sphere, and a hollow sphere.
No.

The above composition may contain an additive, if necessary. The additive is not particularly limited,
For example, a modifier, a heat stabilizer, a plasticizer, an antioxidant, a light stabilizer, a lubricant, an antistatic agent, a flame retardant and the like can be mentioned. The modifier is not particularly limited, for example, methyl methacrylate-butadiene-styrene copolymer resin, acrylonitrile-butadiene-styrene copolymer resin, chlorinated polyethylene, ethylene-vinyl acetate copolymer resin, polyacrylate And the like.

The heat stabilizer is not particularly restricted but includes, for example, barium stearate, calcium stearate, zinc stearate, triphenyl phosphite, epoxidized soybean oil, hydrotalcite and the like. The plasticizer is not particularly limited, for example,
Epoxy plasticizers such as phthalic acid ester, adipic acid ester, sebacic acid ester, azelaic acid ester, phosphate ester, trimellitic acid ester, polyester polymer plasticizer, epoxidized soybean oil, and epoxidized linseed oil. be able to.

The antioxidant is not particularly limited.
For example, n-octadecyl-3- (3 ', 5'-di-t
-Butyl-4'-hydroxyphenyl) propionate and other phenolic antioxidants; tris (2,4-di-t)
And phosphorus-based antioxidants such as (-butylphenyl) phosphite. The light stabilizer is not particularly limited, and examples thereof include benzophenone-based light stabilizers such as 2-hydroxy-4-methoxybenzophenone, and 2- (2 ′).
-Hydroxy-5'-methylphenyl) benzotriazole and other benzotriazole-based light stabilizers.

The lubricant is not particularly limited, and examples thereof include carbana wax, montan wax, paraffin wax, polyethylene wax, butyl stearate and the like. The antistatic agent is not particularly limited, and examples thereof include glycerin fatty acid esters and polyethylene oxide. The flame retardant is not particularly limited, and includes, for example, brominated flame retardants such as decabromodiphenyl oxide, phosphorus-based flame retardants such as red phosphorus, and inorganic flame retardants such as aluminum hydroxide and magnesium hydroxide. it can.

The combination of the primary color pigments in the above composition can be carried out, for example, by mixing. The mixing can be performed, for example, by mixing two or more of the primary color pigments together with a thermoplastic resin in an appropriate container and stirring the mixture. In this case, for example, using a ribbon blender, a Henschel mixer, or the like Can be. The amount and type of the primary color pigment used can be appropriately selected in consideration of the color, hue, lightness, and saturation to be obtained.

The above composition obtained as described above is
The film is formed into a film to be a heat-insulating color film of the present invention. The heat-shielding color film of the present invention preferably contains the above-mentioned glass beads. When the heat-shielding color film of the present invention contains the above-mentioned glass beads, the above-mentioned glass beads have low thermal conductivity and reflect without absorbing heat energy such as sunlight, so that the heat-shielding color film obtained has a heat-shielding property. Can be further improved, and design properties can be imparted to the heat-shielding color film.

The above-mentioned glass beads are mainly made of glass and may be filled with glass up to the inside, but may be hollow. Hollow ones have low heat conductivity and are excellent in heat insulation, so they are shielded. Thermal properties can be further improved. The term “hollow” used herein refers to an open pore structure, a porous structure, a structure in which a hollow portion is closed, and the like. The former two are the primary color pigment, the mixed pigment, or the composition that forms the heat-shielding color film. May enter the inside and reduce the heat shielding property, so that a structure in which the hollow portion is closed is preferable. The shape of the above glass beads is spherical, acicular,
It may have a plate shape, a column shape, or the like, but a spherical shape is preferable because the heat shielding property is improved by excellent heat reflectivity. The glass beads are preferably transparent, translucent, white or milky white. When the glass beads have these colors, they have excellent heat reflection properties and thus have high heat shielding properties, and have little effect on the color of the heat shielding color film of the present invention.

The particle size of the above glass beads is 1 to 150 μm.
m is preferable. When the particle diameter of the glass beads exceeds 150 μm, the workability at the time of producing the composition containing the mixed pigment and the thermoplastic resin or at the time of molding the film-like material deteriorates, and the obtained heat-shielding color The appearance and physical properties of the film may be inferior, and if it is less than 1 μm, sufficient heat shielding properties cannot be obtained by adding the glass beads. The particle size of the glass beads is more preferably 5 to 100 μm, and still more preferably 8 to 80 μm.
It is. The particle size of the glass beads is not particularly required to be uniform, and may be widely distributed. When the distribution of the particle diameter is wide, small particles can enter between the particles having a large diameter.As a result, the distribution of the glass beads in the heat-shielding color film of the present invention is improved. The heat insulation of the film can be further improved.

The glass beads are not particularly limited as long as they have the above characteristics. For example, CEL-
STAR (manufactured by Asahi Glass Co., Ltd.) and HSC-110 (manufactured by Toshiba Baroteini Co., Ltd.). When the heat-shielding color film of the present invention contains the glass beads, the content of the glass beads is preferably 0.1 to 10% by weight of the heat-shielding color film. When the content is less than 0.1% by weight, sufficient heat shielding properties cannot be obtained by adding the glass beads. When the content is more than 10% by weight, the fluidity deteriorates when the composition is formed into a film. There is a possibility that physical properties of the obtained heat-insulating color film may be deteriorated. It is more preferably 0.5 to 8% by weight, and still more preferably 1 to 6% by weight.

The method for incorporating the glass beads into the heat-shielding color film is not particularly limited. For example, when the composition is obtained and / or when the composition is formed into a film, Beads can be added.

The thickness of the film material constituting the heat-shielding color film of the present invention can be appropriately selected according to the purpose of applying the heat-shielding color film of the present invention. It is preferably 500 μm, more preferably 100 to 300 μm.

The film-like material may be provided with an adhesive layer on one side. By doing so, it is possible to improve the adhesiveness to the substrate and the workability when applying the heat-shielding color film of the present invention to the substrate.

As the pressure-sensitive adhesive used for the pressure-sensitive adhesive layer,
For example, rubber such as styrene-isoprene-styrene block copolymer rubber, styrene-butadiene-styrene block copolymer rubber, styrene-butadiene rubber, polybutene rubber, polyisoprene rubber, butyl rubber, silicone rubber, natural rubber, synthetic isoprene rubber, etc. A synthetic resin such as poly (meth) acrylate, polyvinyl ether, polyurethane, polyester, polyamide, and ethylene-based copolymer; Of these, poly (meth) acrylate, natural rubber, and styrene-isoprene-styrene block copolymer rubber are preferred. These pressure-sensitive adhesives may be used alone or in combination of two or more.

A plasticizer, a tackifying resin, a filler, an antioxidant, and the like may be further used in combination with the pressure-sensitive adhesive. Examples of the plasticizer include liquid paraffin, palm oil,
Examples include beeswax, carnauba wax, coconut oil, polybutene, lanolin, process oil, castor oil, cottonseed oil and the like.

Examples of the tackifying resin include bicopale resin, rosin ester, terpene resin, ester gum H, picolite, stevelite resin, β-binene polymer and the like.

Examples of the filler include calcium carbonate, silicas and the like. Examples of the antioxidant include 4,4-dioxydiphenyl and dioxydiphenylmethane derivatives.

The thickness of the adhesive layer is 0.005 to 0.2.
0 mm is preferred. If it is less than 0.005 mm, the adhesive strength will be weak, and if it is more than 0.20 mm, the cohesive force will be reduced and adhesive residue will be more likely to occur.

When the adhesive layer is provided on one side of the film-like material, for example, a method of laminating the film-like material and a layer composed of an adhesive, after applying the adhesive on the film-like material, , A method of drying, a method of attaching a tape having an adhesive layer on both sides, and the like.
It can be appropriately selected according to the purpose of the present invention.

Since the heat-shielding color film of the present invention is in the form of a film, it can be easily disposed on a substrate, and in that state, it can be easily formed by a simple method such as heating or pressing. The heat-shielding color film of the present invention, which can be installed on a base material and has an adhesive layer, prevents the film from being displaced during the above-mentioned arrangement, and improves workability and accuracy, and after installation. Peeling and detachment can be prevented.

The substrate to which the heat-insulating color film of the present invention is applied is not particularly limited, and examples thereof include a metal substrate, a plastic substrate, and an inorganic material substrate.
Examples of the metal substrate include an aluminum plate, an iron plate, a galvanized steel plate, an aluminum galvanized steel plate, a stainless steel plate, and a tin plate. Examples of the plastic substrate include an acrylic plate, a polyvinyl chloride plate, a polycarbonate plate, an ABS plate, a polyethylene terephthalate plate, and a polyolefin plate. JIS A 5422, J
Examples include ceramic-based substrates and glass substrates described in IS A 5430 and the like.

The above-mentioned base material may be subjected to a surface treatment for improving adhesion or imparting rust resistance, or may be coated with an undercoat, an undercoat and an intermediate paint, The back surface of the substrate may be coated with a back surface paint, which can be appropriately selected according to the purpose of use.

[0044]

EXAMPLES The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples. (Selection of primary color pigment) Red composition 35 parts by weight of a polyester polymer plasticizer (manufactured by Asahi Denka Kogyo KK) as a plasticizer, 100 parts by weight of a vinyl chloride resin having a degree of polymerization of 1100, barium stearate and zinc stearate as stabilizers, Fastgen as a pigment 2 parts by weight of Red 500RG (manufactured by Dainippon Ink and Chemicals, Inc .; referred to as red pigment 1) were added and mixed using a ribbon blender to obtain a red composition 1.

2. Yellow composition 35 parts by weight of a polyester polymer plasticizer (manufactured by Asahi Denka Kogyo KK) as a plasticizer, 100 parts by weight of a vinyl chloride resin having a degree of polymerization of 1100, barium stearate and zinc stearate as stabilizers, and Sicopearl as a pigment. Yellow L
-1110 (manufactured by BASF; referred to as yellow pigment 1) (2 parts by weight) was added and mixed using a ribbon blender to obtain a yellow composition 1. Similarly, yellow composition 2 was obtained using 2 parts by weight of Shimla First Yellow 4192 (manufactured by Dainippon Ink and Chemicals, Inc.).

3. Blue Composition 35 parts by weight of a polyester polymer plasticizer (manufactured by Asahi Denka Kogyo KK) as a plasticizer, 100 parts by weight of a vinyl chloride resin having a polymerization degree of 1100, barium stearate and zinc stearate as stabilizers, and Fastogen B as a pigment.
lue RS (manufactured by Dainippon Ink and Chemicals, Inc.) was added and mixed using a ribbon blender to give a blue composition 1
I got Similarly, blue composition 2 was obtained using 2 parts by weight of cyanine blue 5240 KB (manufactured by Dainichi Seika Kogyo Co., Ltd.).

4. Green composition 35 parts by weight of a polyester polymer plasticizer (manufactured by Asahi Denka Kogyo KK) as a plasticizer, 100 parts by weight of a vinyl chloride resin having a polymerization degree of 1100, barium stearate and zinc stearate as stabilizers, and lionol as a pigment Green 6
2 parts by weight of YKP-N (manufactured by Toyo Ink Mfg. Co., Ltd.) were added and mixed using a ribbon blender to obtain a green composition 1.
Similarly, green composition 2 was obtained using 2 parts by weight of Fast Gen Green 2YK (manufactured by Dainippon Ink and Chemicals, Inc.).

5. Black Composition 35 parts by weight of a polyester polymer plasticizer (manufactured by Asahi Denka Kogyo KK) as a plasticizer, 100 parts by weight of a vinyl chloride resin having a degree of polymerization of 1100, barium stearate and zinc stearate as stabilizers, and Fastogen S as a pigment.
2 parts by weight of upper Black MX (manufactured by Dainippon Ink and Chemicals, Inc .; black pigment 1) was added and mixed using a ribbon blender to obtain black composition 1. Similarly, Pariogen Schwarz S0084 (BASF
Company. Black pigment 2. ) Black composition 2 was obtained using 2 parts by weight.

6. White composition 35 parts by weight of a polyester polymer plasticizer (manufactured by Asahi Denka Kogyo KK) as a plasticizer, 100 parts by weight of a vinyl chloride resin having a degree of polymerization of 1100, barium stearate and zinc stearate as stabilizers, and titanium CR97 as a pigment. 2 parts by weight (manufactured by Ishihara Titanium Industry Co., Ltd .; white pigment 1) were added and mixed using a ribbon blender to obtain white composition 1.

(Measurement of Solar Reflectance) The spectral reflectance spectrum of each primary color composition obtained as described above was measured. Each composition was formed into a film by a calender roll to obtain a film having a thickness of 250 μm.
About this, a spectrophotometer (U-35, manufactured by Hitachi, Ltd.)
00 spectrophotometer). 7
Based on the reflectance in the wavelength range of 80 to 2100 μm,
The solar reflectance was calculated according to the method described in JIS A 5759. The results are shown in Table 1.

[0051]

[Table 1]

As a conventional product, it is used for steel plate coating.
6% solar reflectance in the wavelength range of 80 to 2100 nm
The following three types of low solar reflectance color films comprising the following pigments and a thermoplastic resin were prepared. Black color film (Low solar reflectance color film 1, trade name NF FC24504-R107, manufactured by Riken Vinyl Industry Co., Ltd.) Gray color film (low solar reflectance color film 2, trade name: WB794, manufactured by Riken Vinyl Industry Co., Ltd.) ) Brown color film (Low solar reflectance color film 3, trade name: AWF FC92593-R100, manufactured by Riken Vinyl Industry Co., Ltd.)

(Preparation of heat-shielding color film) The primary color pigments used for preparing the primary color compositions shown in Table 1 were combined in the following ratios to form a mixed pigment. Further, as a thermoplastic resin, a pigment having a polymerization degree of 1100 was obtained. 100 parts by weight of vinyl resin, 35 parts by weight of a polyester polymer plasticizer (manufactured by Asahi Denka Kogyo KK) as a plasticizer, 6 parts by weight of ceramic beads as a filler, barium stearate and zinc stearate as stabilizers, and a ribbon. By mixing using a blender, the low solar reflectance color film 1,
The high solar reflectance color compositions 1, 2, and 3 were prepared so as to have the same colors as those of the compositions 2, 3, and the obtained compositions were formed into a 250-μm-thick film by a calender roll. The heat-insulating color films 1, 2, and 3 were obtained.

Black high solar reflectance color composition 1 100 parts by weight of black pigment 2 5 parts by weight of white pigment 1 1 part by weight of yellow pigment 1

Gray high-reflectance color composition 2 100 parts by weight of white pigment 1 1 part by weight of black pigment 2

Brown high solar reflectance color composition 3 100 parts by weight of white pigment 1 100 parts by weight of black pigment 2 70 parts by weight of red pigment 1 60 parts by weight of yellow pigment 1

The above high solar reflectance color compositions 1, 2, and 3
, CEL-STAR as glass beads
(Manufactured by Asahi Glass Co., Ltd.) in an amount of 4% by weight of the resulting heat-insulating color film containing glass beads, and mixed by a mixer (ribbon blender). It was formed into a 250 μm film to obtain heat-insulating color films 1, 2, and 3 containing glass beads. Table 2 shows the hue of each color film.

(Preparation of test pieces) The heat-insulating color films 1, 2, and 3 of the present invention obtained as described above, and the heat-insulating color films 1, 2, and 3 containing glass beads, and
The low solar reflectance color films 1, 2, and 3 were arranged on a 0.8 mm thick SPC dull steel plate base material to obtain test pieces. (Measurement of Heat Insulation) The heat insulation of the test piece was evaluated using the test apparatus 8 shown in FIG. As shown in FIG. 1, the test piece 1 is fitted on the upper surface of the styrofoam box 6 with the film layer facing upward, and the test piece 1 is irradiated by an incandescent lamp 2 provided above the test piece 1. The temperature was measured by a temperature sensor 3 installed on the back surface of Sample No. 1 and the measured temperature was recorded by a recorder 4. The incandescent lamp 2 was turned on by the power supply 5.

The dimensions of the test piece were 320 mm × 23.
The thing of 0 mm was used. The thickness of the test box 6 is 30
A styrofoam box with dimensions of 350 mm x 250 mm x 250 mm was used. The test piece 1 and the incandescent lamp 2
Was set to 150 mm.

As the recorder 4, a thermo recorder RT
-10 (manufactured by Tabai Espec) and the incandescent lamp 2 used was a Toshiba reflex lamp RF110V200W (manufactured by Toshiba Corporation). Further, the test was performed in a constant temperature room at 20 ° C. in a state of no wind. The results are shown in Table 2.

[0061]

[Table 2]

The heat-shielding color films 1, 2, and 3 of the present invention
And heat-insulating color film containing glass beads 1, 2, 3
Has the same hue, lightness, and saturation as the low solar reflectance color films 1, 2, and 3, and has the same aesthetic effect. However, in the low solar reflectance color films 1, 2, and 3, a considerable rise in temperature is observed, and heat insulation cannot be expected. On the other hand, the heat-shielding color films 1, 2, and 3 of the present invention have almost no increase in temperature. The heat-insulating color films 1, 2, and 3 containing glass beads of the present invention were not observed, and the temperature rise was even smaller and the heat-insulating properties were more excellent.

[0063]

The heat-insulating color film of the present invention has the above-mentioned structure, and thus has a remarkably excellent heat-insulating property.
Moreover, it has the same color tone as a conventional product, and is excellent in workability and workability.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an apparatus for evaluating the heat shielding property of a coating film.

[Explanation of symbols]

 1 Test piece 2 Incandescent lamp 3 Temperature sensor

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) C08L 101/00 C08L 101/00 E04B 1/74 E04B 1/74 H (72) Inventor Koichi Inoue Ikeda-cho, Neyagawa-shi, Osaka 19-17 Inside Nippon Paint Co., Ltd. (72) Katsuo Miki, Inventor 2-809-4, Amanumacho, Omiya City, Saitama Prefecture (72) Kenichi Kato 3-11-5, Nihonbashi Honcho, Chuo-ku, Tokyo RIKEN Vinyl F term in Industrial Co., Ltd. AF29Y AF30 AF30Y AF43 AF43Y AH01 AH07 BB04 BC01 BC02 BC09 BC12 4J002 BB021 BB111 BC021 BC061 BD041 BD141 BG011 BG021 BN151 CF001 CG001 DE136 DL007 FA087 FD010 FD020 FD030 FD040 FD070 FD096 FD130 FD130

Claims (3)

[Claims] 1. A heat-shielding color film obtained by molding a composition containing a mixed pigment and a thermoplastic resin into a film, wherein the mixed pigment has a thickness of 780 to 2100 nm.
White pigment having a solar reflectance of 40% or more in a wavelength range of 780 to 2100 nm, a blue pigment having a solar reflectance of 7% or more in a wavelength range of 780 to 2100 nm, and a solar reflectance of 8% or more in a wavelength range of 780 to 2100 nm. A certain red pigment, 7
7% solar reflectance in the wavelength range of 80 to 2100 nm
A green pigment, a yellow pigment having a solar reflectance of 10% or more in a wavelength range of 780 to 2100 nm, and
The solar reflectance in the wavelength range of 780 to 2100 nm is 6
%. A heat-shielding color film comprising a combination of two or more types of primary color pigments selected from the group consisting of black pigments of not less than%. 2. The heat-shielding color film according to claim 1, wherein the heat-shielding color film contains 0.1 to 10% by weight of glass beads. 3. The heat-shielding color film according to claim 1, wherein the heat-shielding color film is provided with an adhesive layer on one surface.