JP2009279814A - Heat-shielding film material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat-shielding film material that makes excellent heat shielding properties and comfortable lightness stand together and is suitably used especially for a film structure space such as a tent warehouse, middle- and large-sized tent, truck hood and shading tent. <P>SOLUTION: The heat-shielding film material is obtained by forming an infrared reflective resin layer that is composed of a thermoplastic resin including a coarse-grained titanium oxide having a weight average particle size of 0.6-1.5 μm and interference mica particles on at least one surface of a fibrous base fabric, and it has a visible light transmittance (JIS Z8722) of 10-20%. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a film material having excellent heat shielding properties. More specifically, the present invention combines both excellent heat shielding properties and translucency that provides comfortable brightness, and in particular, membranes such as tent warehouses, medium and large tents, truck hoods, and sunshade tents. The present invention relates to a heat-shielding film material that is suitably used for structural applications.

  A film material in which a thermoplastic resin is coated on a base fabric made of a fiber material by a coating method, dipping method, calendar method, T-die extrusion method, or the like is easy to assemble and construct, and the design of the structure, etc. Because of its high degree of freedom, it is used in a wide range of fields such as membrane structures such as tent warehouses, medium and large tents, truck hoods, and awning tents. However, the conventional film material is highly transmissive or absorbing near-infrared rays contained in sunlight, and therefore, the near-infrared light transmitted or absorbed from the surface side of the film material directly passes through the space where the back surface side of the film material is in contact. The warmed and absorbed infrared rays raise the temperature of the film material and are emitted from the back surface side of the film material as radiant heat. When such a membrane material is used to form a membrane structure space (for example, a tent warehouse), the temperature inside the membrane structure becomes extremely high under strong sunlight in the summer, so that people work for a long time. However, when it was used in a sunshade tent, it was effective to prevent glare and reduce ultraviolet rays, but the cooling effect was hardly recognized. In the case of a tent warehouse, it is possible to lower the internal temperature if cooling is used like a normal building, but the cooling efficiency becomes very low, and considering the energy cost and the environmental burden associated with it, The tent warehouse was not satisfactory in practice.

  A technique for providing a sheet that reflects near-infrared rays contained in solar rays has been practiced for a long time. For example, a technique in which aluminum is vapor-deposited on a polyester film surface (Patent Document 1) is known. When this sheet is used outdoors as a film material, the wear strength of the aluminum deposited layer on the surface is poor, so it is not suitable for long-term use. Also known is a sheet (Patent Document 2) in which a specific amount of aluminum powder is contained in a plastic resin. Sheets such as those described in Patent Documents 1 and 2 are an aluminum vapor deposition film or an aluminum powder-containing sheet that absorbs light rays, whereby the film or sheet itself is heated to a high temperature, and a structure composed of these films and sheets. Although sunlight does not reach the inside directly, there is indirect heating due to heat conduction, and there is also concern about deterioration of the film or sheet itself due to heat.

  On the other hand, as a method for imparting low thermal conductivity in order to prevent the temperature rise of the thermoplastic resin layer coated on the base fabric, there is a technique in which a hollow sphere and a white pigment are used in combination in the thermoplastic resin layer (for example, Patent Document 3 and Patent Document 4), since the hollow sphere itself has no heat shielding effect, the heat shielding effect is reduced when exposed to the surface of the thermoplastic resin layer, and the hollow sphere is thermoplastic by containing the hollow sphere. Since the film strength of the resin layer is reduced and the wear strength of the resin layer is low, it is inappropriate as a film material for long-term use outdoors.

  Moreover, the resin layer containing the titanium oxide for pigments (particle diameter 0.2-0.4 micrometer) scatters the near infrared rays contained in a solar ray, and shows thermal insulation (for example, patent document 5, patent document 6). )It has been known. However, it is necessary to increase the amount of titanium oxide contained in the resin layer in order to obtain better heat shielding properties by these methods, and in this way, the concealability of the resin layer increases and the translucency of the film material decreases. However, a comfortable brightness cannot be obtained, and there is a problem that the interior of the tent warehouse using such a film material needs to be darkly lit even during the day. Accordingly, there has been a demand for a film material having both heat shielding properties and translucency.

  As an attempt to improve this problem, thermoplastic resin films and coating films (for example, Patent Document 7 and Patent Document 8) containing coarse titanium oxide having a weight average particle diameter of 0.6 to 1.5 μm are known. . Also known are thermoplastic resin films and sheets (for example, Patent Document 9 and Patent Document 10) containing mica particles coated with titanium oxide. These thermoplastic resin films, sheets, and coating films are used in agricultural films and agricultural coating materials, and are more transparent than those containing titanium oxide for pigments (particle diameter: 0.2 to 0.4 μm). Although the light property is improved, priority is given to high visible light transmittance, and the actual heat shielding property is low at present. Furthermore, in order to obtain more excellent heat shielding properties by the thermoplastic resin layer containing the coarse titanium oxide, it is necessary to increase the coarse titanium oxide contained in the resin layer, and the content of the coarse titanium oxide is small. In the range, it is effective in improving translucency, but if the content is increased, the concealability of the resin layer is increased and the translucency of the film material is lowered as in the case of titanium oxide for pigment, and comfortable brightness cannot be obtained. There was a problem. In addition, in the thermoplastic resin film or sheet containing mica particles coated with titanium oxide, the amount of decrease in translucency due to the inclusion of mica particles coated with titanium oxide is small, and high translucency can be maintained. On the other hand, however, there is a problem that even if the content is increased, excellent heat shielding properties cannot be obtained.

  In recent years, a membrane structure space using a membrane material is required to be bright from the viewpoint of energy saving of illumination, and the brightness is also required to be comfortable and comfortable for humans. Specifically, the brightness is dull and soft, and the brightness is such that the flow of sky clouds can be seen in the membrane structure space. The transmittance of the membrane material is 10 to 20% visible light transmittance ( Brightness equivalent to JIS Z8722) is required. There are already various types of film materials having a visible light transmittance of 10 to 20%, but these have a problem that they generally have low heat shielding properties. Thus, a film material having a visible light transmittance of 10 to 20%, which is comfortable brightness, and an excellent heat shielding property has not yet been provided.

JP 2000-71858 A JP-A-8-81567 JP 2004-10903 A JP 2001-220502 A JP 2006-233139 A JP 2006-335949 A JP 2006-314218 A JP 2007-295858 A Japanese Patent Laid-Open No. 10-290635 JP 2007-111102 A

  The present invention has both excellent heat shielding properties and translucency that provides comfortable brightness, and is particularly suitable for use in membrane structures such as tent warehouses, medium and large tents, truck hoods, and sunshade tents. An object of the present invention is to provide a heat-shielding film material used for the above.

  In order to solve the above problems, the present inventor has achieved excellent results by blending coarse titanium oxide having a weight average particle diameter in a specific range and interference mica particles in the thermoplastic resin layer as a result of intensive studies. It has been found that a heat-shielding film material having both heat-shielding properties and comfortable brightness can be obtained, and the present invention has been completed.

The heat-shielding film material of the present invention comprises a base fabric formed from a fiber material and an infrared reflective resin layer formed on at least one surface thereof, and has a visible light transmittance (JIS Z8722) of 10 to 20%. The infrared reflective resin layer is made of a thermoplastic resin containing coarse titanium oxide having a weight average particle diameter of 0.6 to 1.5 μm and interference mica particles. To do.
In the heat-shielding film material of the present invention, the infrared reflective resin layer is 5 to 15% by mass of the coarse titanium oxide and 1 to 5% by mass of the interference mica particles with respect to the mass of the infrared reflective resin layer. Are preferably included.
In the heat-shielding film material of the present invention, the interference mica particles are preferably coated with a titanium oxide thin film or a thin film having a multilayer structure of titanium oxide / silicon oxide / titanium oxide.
In the heat shielding film material of the present invention, it is preferable that an antifouling layer is further formed on the infrared reflective resin layer.
The thermal barrier film material of the present invention preferably has a solar heat gain (JIS R3106) of 10% or less.

  The membrane material of the present invention has both excellent heat shielding properties and comfortable brightness. For example, it can be used to form membrane structures such as tent warehouses, medium and large tents, truck hoods, and sunshade tents. By using it, it is possible to provide a comfortable space having heat shielding properties and comfortable brightness.

  The fibers forming the base fabric contained in the heat-shielding film material of the present invention include polypropylene fibers, polyethylene fibers, polyester fibers, nylon fibers, vinylon fibers and other synthetic fibers, cotton, hemp and other natural fibers, acetate and other semi-finished fibers. Examples thereof include inorganic fibers such as synthetic fibers, glass fibers, silica fibers, alumina fibers, and carbon fibers, which may be composed of single or two or more kinds of mixed fibers, and the shape thereof is a multifilament yarn, It may be any of short fiber spun yarn, monofilament yarn, split yarn yarn, tape yarn yarn and the like. The fiber base fabric used in the present invention may be any of a woven fabric, a knitted fabric, and a non-woven fabric. When a woven fabric is used, it may have any structure such as a plain weave, a twill weave, a satin weave, and a patterned weave. A woven fabric is preferably used because it is excellent in the longitudinal and physical properties balance of the obtained film material. When using a knitted fabric, a weft insertion tricot of Russell knitting is preferably used. These knitted fabrics are each a coarse knitted fabric composed of yarns including warps and wefts arranged in parallel with a gap between yarns (the porosity is 80% at maximum, preferably 5 to 50%) And non-coarse knitted fabric (knitted fabric with substantially no gap formed between yarns). As the nonwoven fabric, a spunbond nonwoven fabric can be used. The fiber base fabric may be subjected to water repellent treatment, water absorption prevention treatment, adhesion treatment, flame retardant treatment, and the like as necessary.

  The thermoplastic resin (including thermoplastic elastomer) used for the infrared reflective resin layer used in the heat-shielding film material of the present invention includes vinyl chloride resin, vinyl chloride copolymer resin, olefin resin, olefin copolymer Combined resin, urethane resin, urethane copolymer resin, acrylic resin, acrylic copolymer resin, vinyl acetate resin, vinyl acetate copolymer resin, styrene resin, styrene copolymer resin, polyester resin, polyester resin Copolymer resins, fluorine-containing copolymer resins, and the like may be used alone or in combination of two or more. Among these thermoplastic resins, vinyl chloride resins (including soft to semi-rigid vinyl chloride resins blended with plasticizers, stabilizers, etc.), olefin copolymer resins, urethane copolymer resins, and polyester resins. It is preferable to use a copolymer resin, a fluorine-containing copolymer resin, or the like. Specific examples of the vinyl chloride resin and the vinyl chloride copolymer resin include polyvinyl chloride, vinyl chloride-ethylene copolymer resin, vinyl chloride-vinyl acetate copolymer resin, vinyl chloride-vinylidene chloride copolymer. Resin, vinyl chloride-acrylic acid copolymer resin, and vinyl chloride-urethane copolymer resin. Further, the olefin resin and olefin copolymer resin are specifically polyethylene, polypropylene, ethylene-α-olefin copolymer resin, ethylene-vinyl acetate copolymer resin, ethylene-acrylic acid copolymer resin, ethylene. -Acrylic acid ester copolymer resin, ethylene-methacrylic acid copolymer resin, ethylene-methacrylic acid ester copolymer resin, reactor polymerization resin of polypropylene and ethylene-propylene rubber (EPR rubber), and these polymer alloys PP-EPR resin that is a polymer, reactor polymerization resin of polypropylene and ethylene-propylene-conjugated diene rubber (EPDM rubber), or PP-EPDM resin that is a polymer alloy of these. The thermoplastic resin coating layer of the daylighting film material of the present invention can be colored with organic pigments and inorganic pigments, and plasticizers, stabilizers, fillers, ultraviolet absorbers, adhesives, flameproofing agents, and anti-proofing agents as necessary. It can contain glazes, lubricants and the like.

  It is preferable that the weight average particle diameter of the coarse-grained titanium oxide constituting the infrared reflective resin layer used for the heat-shielding film material of the present invention is 0.6 to 1.5 μm. When the weight average particle diameter is less than 0.6 μm, when a small amount thereof is contained, the average transmittance of light in the visible light region having a wavelength of 400 nm or more and less than 700 nm is lowered, and the wavelength is close to 700 nm or more and less than 2000 nm. The average light transmittance in the infrared light region is increased, and the resulting infrared reflective resin layer is whitened, resulting in insufficient light transmittance. Further, when the weight average particle diameter exceeds 1.5 μm, the light scattering efficiency in the near infrared region decreases, and as a result, the average light transmittance in the near infrared region increases, and the heat shielding property decreases. . The coarse titanium oxide particles used in the present invention are preferably surface-coated in order to obtain long-term weather resistance. For example, the coarse titanium oxide particles are coarsely coated with a metal oxide such as aluminum oxide, zinc oxide, silicon oxide, or zirconium oxide. Coarse-grained titanium oxide particles whose surface is coated at 0.05 to 3% by mass with respect to the granular titanium oxide particles are preferred.

The interference mica particles contained in the infrared reflective resin layer used in the heat-shielding film material of the present invention have a mica particle surface having a titanium oxide thin film, or titanium oxide / silicon oxide / titanium oxide (TiO ₂ / SiO ₂ / TiO ₂ ). The optical coherent particles are coated with a thin film having a multilayer structure of three layers and have a particle diameter of 5 to 100 μm, particularly 25 to 75 μm. The coverage with the titanium oxide thin film on the surface of the mica particles is preferably limited to 35 to 70%, and more preferably 45 to 60%. If it is less than 35%, the shielding property against heat rays from sunlight may be insufficient, and if it exceeds 70%, the translucency of the infrared reflecting resin layer may be insufficient. Or, the weather resistance of the infrared reflective resin layer may be insufficient due to the catalytic activity of titanium oxide. The method for producing the interference mica particles is not particularly limited. For example, the surface of the mica particles is coated with titanium hydroxide by hydrolysis of titanium tetrachloride, and further sintered to crystallize titanium oxide. It is done. The coverage of the thin film on the surface of the mica particles refers to the mass ratio of the thin film in the mica particles whose surfaces are coated with the thin film, and the amount of titanium oxide is the mass in terms of titanium dioxide.

  When only the coarse titanium oxide is contained in the infrared reflective resin layer of the film material, when the content is small, the obtained film material has a visible light transmittance of 10 to 20%, but the heat shielding property is low. A solar heat gain rate of 10% or less cannot be obtained. Further, when the content is large, the heat shielding property of the obtained film material is improved, and a solar heat gain rate of 10% or less can be obtained, but the concealing property of the film material is increased, and the visible light transmittance is 10 to 20%. Comfortable brightness cannot be obtained.

  When only the interference mica particles are contained in the infrared reflecting resin layer of the film material, it is possible to maintain a light transmittance of 30% or more by adjusting the content and to impart heat shielding properties. The level of the heat shielding property is insufficient, and even if the content of the interference mica particles is increased, the improvement of the heat shielding property is small. In the obtained film material, a comfortable brightness with a visible light transmittance of 10 to 20% and 10% It is difficult to achieve both a solar heat gain rate of less than%.

  In the heat-shielding film material of the present invention, it is the first time that the infrared reflective resin layer of the film material contains both coarse titanium oxide and interference mica particles. High brightness and excellent heat shielding properties with a solar heat acquisition rate of 10% or less.

  The content of coarse-grained titanium oxide contained in the infrared reflective resin layer of the heat-shielding film material of the present invention is preferably 5 to 15% by mass, and 8 to 12% by mass with respect to the mass of the infrared reflective resin layer. It is more preferable that When the content is less than 5% by mass, the heat shielding property of the film material is lowered, and even when combined with interference mica particles, a solar heat gain rate of 10% or less may not be obtained. On the other hand, when the content exceeds 15% by mass, the concealability of the film material is increased and a visible light transmittance of 10 to 20% may not be obtained.

  The content of the interference mica particles in the infrared reflective resin layer of the heat-shielding film material of the present invention is 1 to 5 mass relative to the mass of the infrared reflective resin layer in combination with 5 to 15 mass% of coarse titanium oxide. %, And more preferably 2 to 4% by mass. When the content of the interference mica particles is less than 1% by mass, the heat shielding property of the film material becomes insufficient, and even when combined with coarse titanium oxide, a solar heat gain of 10% or less may not be obtained. . Further, when the content of the interference mica particles exceeds 5% by mass, the surface color and translucent color of the film material become iridescent, and glare and irritation occur, and the space surrounded by the film material is translucent. There is a possibility, but comfortable brightness may not be obtained.

  In the heat-shielding film material of the present invention, at least one layer is provided on the infrared-reflective resin layer in order to prevent the heat-shielding effect due to the adhesion of dirt over time and the decrease in translucency and maintain the aesthetic appearance. An antifouling layer can be provided. The antifouling layer is not particularly limited in its formation method and material as long as it does not impair the heat-shielding and light-transmitting properties of the heat-shielding film material and does not have extreme concealing properties. Such an antifouling layer is, for example, a coating film formed by applying a resin solution consisting of at least one of an acrylic resin or a fluorine resin solubilized in a solvent, silica fine particles, or colloidal silica. Coating film including coating film, organosilicate and / or hydrophilic coating layer formed by applying coating agent containing condensate thereof, coating agent containing photocatalytic inorganic material (eg photocatalytic titanium oxide) and binder The photocatalyst layer thus formed, or a film layer obtained by laminating a film having at least the outermost surface formed of a fluorine-based resin by an adhesive or hot melt processing, can be appropriately selected.

  The heat-shielding film material of the present invention is a flexible film material having a base fabric made of a fiber material and a thermoplastic resin coating layer formed on at least one surface thereof. It is preferably a waterproof membrane material such as canvas or a mesh sheet. Among these, to produce canvas and mesh sheets, a thermoplastic resin solubilized in an organic solvent, a thermoplastic resin emulsion (latex) emulsion-polymerized in water, or a thermoplastic resin is forcibly dispersed in water and stabilized. Dipping process (double-sided processing to fiber fabric) using a water-dispersed resin such as a dispersion resin, soft polyvinyl chloride resin paste sol, etc., and coating processing (single-sided processing or double-sided processing to fiber fabric) are used. be able to. Tarpaulin is a method of laminating a film or sheet formed by a calender molding method or a T-die extrusion method with an adhesive layer interposed on one or both sides of the fiber base fabric, or via a void space on both sides of the fiber fabric. It is preferable to manufacture by a method of heat laminating and laminating, and further, it can be manufactured by a combination of dipping or coating and film lamination.

The present invention is further illustrated by the following examples and comparative examples.
In the following Examples, the test methods used for evaluating the visible light transmittance and solar heat acquisition rate at the initial stage and after one year of outdoor exposure are as follows.
(1) Visible light transmittance The visible light transmittance of the film material was measured according to JIS Z8722 using a spectrocolorimeter CM-3600d (manufactured by Konica Minolta Co., Ltd.).
(2) Solar heat acquisition rate The solar heat acquisition rate of the membrane material is measured in accordance with JIS R3106 using a spectrophotometer V-670 (manufactured by JASCO Corporation) to measure solar transmittance and solar absorption rate. Calculated according to the equation (1).
Solar heat acquisition rate: η = a + b (1 / αti) / (1 / αti + 1 / αto) (1)
αto: Overall heat transfer coefficient on the outdoor surface (normal value 25 W / m ² K)
αti: Total heat transfer coefficient on the indoor side surface (normal value 9 W / m ² K)
a: Solar radiation transmittance
b: Solar radiation absorptivity (3) Outdoor exposure test An outdoor exposure test (one year) was performed on an outdoor exposure table by setting the surface of the test membrane material facing upward and an inclination angle of 30 degrees southward.

Example 1
(1) Production of sheet substrate (formation of undercoat layer and vinyl chloride infrared reflective resin layer)
(A) Formation of undercoat layer As a base fabric, a polyester filament plain fabric having the following structure was used.
(1000d x 1000d) / (22 / 2.54cm x 25 / 2.54cm)
Mass: 215 g / m ²
This base fabric is immersed in a solvent diluted solution of a resin composition of the following formulation 1 containing a paste vinyl chloride resin, the base fabric is impregnated with the resin solution, squeezed, dried at 150 ° C. for 1 minute, and then at 185 ° C. After heat treatment for 1 minute, 145 g / m ^{2 of} resin was adhered to the base fabric to form an undercoat layer.
<Formulation 1> Undercoat layer Paste vinyl chloride resin 100 parts by mass DOP (plasticizer) 70 parts by mass Epoxidized soybean oil 4 parts by mass Calcium carbonate 10 parts by mass Ba-Zn stabilizer 2 parts by mass Toluene (solvent) 20 parts by mass ( B) Formation of vinyl chloride-based infrared reflective resin layer Next, an infrared reflective resin film (0.16 mm thick) for the front surface comprising a resin composition of the following formulation 2 containing a straight vinyl chloride resin, A backside resin film (0.16 mm thick) made of the resin composition of Formulation 3 was prepared with a calender and adhered to the front and back surfaces of the undercoat layer-impregnated base fabric, respectively. A 200 g / m ² infrared reflective resin layer and a resin layer were formed on the front surface and the back surface, respectively, to produce a heat shielding film material having a total weight of 760 g / m ² .
<Formulation 2> Vinyl chloride-based infrared reflective resin layer (for front surface)
Soft vinyl chloride resin 90% by mass
Straight vinyl chloride resin 100 parts by mass DOP (plasticizer) 55 parts by mass Epoxidized soybean oil 4 parts by mass Antimony trioxide (flameproofing agent) 6 parts by mass Ba-Zn stabilizer 2 parts by mass Mass average particle size 0.8 to 1.2μm coarse titanium oxide 8% by mass
(Surface coverage by aluminum oxide: 2.4% by mass)
Interference mica particles 2% by mass
(Particle size: 25 to 65 μm, coverage with a thin film having a multilayer structure of TiO ₂ / SiO ₂ / TiO ₂ : 45% by mass)
<Formulation 3> Vinyl chloride resin film (back side)
Straight vinyl chloride resin 100 parts by mass DOP (plasticizer) 55 parts by mass Epoxidized soybean oil 4 parts by mass Antimony trioxide (flameproofing agent) 6 parts by mass Ba-Zn stabilizer 2 parts by mass It was used for. The test results are shown in Table 1.

Example 2
A heat shielding film material was produced in the same manner as in Example 1. However, an antifouling layer was formed on the infrared reflective resin layer as follows.
On the front surface side infrared reflecting resin layer of the film material prepared in Example 1, a solvent dilution solution of a resin composition of the following formulation 4 as an acrylic resin was applied using a gravure coater to a coating amount of 25 g / The coating was applied to m ² , dried at 120 ° C. for 1 minute, and then cooled to form a 5 g / m ² antifouling layer.
<Formulation 4> Acrylic resin antifouling layer Trademark: Acryprene Pellets HBS001 (Mitsubishi Rayon Co., Ltd.) 20 parts by mass Toluene-MEK (50/50 weight ratio) (solvent) 80 parts by mass It used for the test. The test results are shown in Table 1.

Example 3
A heat shielding film material was produced in the same manner as in Example 1. However, the composition of the front surface side vinyl chloride infrared reflective resin layer was changed to the resin composition of the following formulation 5, and further on the front surface side infrared reflective resin layer, a photocatalyst protection was provided via an adhesive protective layer. A dirty layer was formed.
<Formulation 5> Vinyl chloride-based infrared reflective resin layer (for front surface)
84% by mass of soft vinyl chloride resin
Straight vinyl chloride resin 100 parts by mass DOP (plasticizer) 55 parts by mass Epoxidized soybean oil 4 parts by mass Antimony trioxide 6 parts by mass Ba-Zn stabilizer 2 parts by mass Coarse with a mean particle diameter of 0.8 to 1.2 μm Granular titanium oxide 12% by mass
(Surface coverage by aluminum oxide: 2.4% by mass)
Interference mica particles 4% by mass
(Particle size: 25-65 μm, thin film coverage with multiple structures of TiO ₂ / SiO ₂ / TiO ₂ : 45% by mass)
In order to form a photocatalyst antifouling layer on the front side infrared reflection resin layer, solvent dilutions of the following resin compositions for formulation 6 and 7, and a photocatalyst antifouling layer resin composition, Using a gravure coater, the coating amount was 15 g / m ² , dried at 100 ° C. for 1 minute and then cooled to form a 1.5 g / m ² adhesion protective layer and a photocatalytic antifouling layer, A thermal barrier film material was prepared.
<Formulation 6> Adhesive protective layer for photocatalytic antifouling layer 8% by weight (solid content) of acrylic silicon resin having a silicon content of 3 mol%
Ethanol-ethyl acetate (50/50 weight ratio)
Solution 100 parts by weight Methyl silicate MS51 (Colcoat Co., Ltd.) as polysiloxane
8 parts by weight of ethanol solution 8 parts by weight γ-glycidoxypropyltrimethoxy silane 1 part by weight as a silane coupling agent <Formulation 7> Photocatalytic antifouling layer Disperse an acidic titanium oxide sol corresponding to a titanium oxide content of 10% by weight 50 parts by weight of water-ethanol (50/50 weight ratio) solution 50 parts by weight of water-ethanol (50/50 weight ratio) solution in which a nitric acid acidic silica sol corresponding to a silicon oxide content of 10% by weight is dispersed is obtained. A thermal membrane material was subjected to the test. The test results are shown in Table 1.

Example 4
(1) Production of sheet substrate (formation of undercoat layer and infrared reflective resin layer)
(A) Formation of undercoat layer As a base fabric, a polyester filament plain fabric having the following structure was used.
(1000d x 1000d) / (22 / 2.54cm x 25 / 2.54cm)
Mass: 215 g / m ²
This base fabric is dipped in a solvent diluted solution of a resin composition of the following formulation 8 containing a polyurethane resin, the base fabric is impregnated with the resin solution, squeezed, dried at 150 ° C. for 1 minute, and 1 at 185 ° C. Heat treatment was performed for minutes, and 145 g / m ^{2 of} resin was adhered to the base fabric to form an undercoat layer.
<Formulation 8> Polyurethane-based resin undercoat layer Polycarbonate-based polyurethane resin dispersion 100 parts by mass (Trademark: Rezamin D-9075E: Solid content concentration 38% by mass: Dainichi Seika Kogyo Co., Ltd.)
5 parts by mass of cyclic phosphonate compound (trade name: K-19A: Meisei Chemical Co., Ltd.)
Melamine-coated ammonium polyphosphate (degree of polymerization n = 1000) 10 parts by mass (Trademark: Exorit AP462: Clariant Japan Co., Ltd.)
Melamine cyanurate (Trademark: MC640: Nissan Chemical Co., Ltd.) 10 parts by mass Carbodiimide compound (curing agent) 5 parts by mass (Trademark: Carbodilite V-02: Active ingredient 40% by mass: Nisshinbo Industries, Ltd.)
10 parts by mass of paraffinic water repellent (water absorption inhibitor) (trademark: TH-44, Nikka Chemical Co., Ltd.)
(B) Formation of Olefin-Based Infrared Reflective Resin Layer Next, an infrared reflective resin film for a front surface (0.16 mm thickness) comprising a resin composition of the following formulation 9 containing an olefin-based resin, and the following formulation 10 A backside resin film (0.16 mm thick) made of a resin composition was prepared with a calender and adhered to the front and back surfaces of the undercoat layer-impregnated base fabric, respectively. A 200 g / m ² infrared reflective resin layer and a resin layer were formed on each of the surfaces to produce a heat shielding film material having a total weight of 760 g / m ² .
<Formulation 9> Olefin-based infrared reflective resin layer (front surface)
84% by mass of olefin resin
Polypropylene resin 50 parts by mass (Trademark: Catalloy KS-353P: Sun Allomer Co., Ltd.)
25 parts by mass of styrene-based copolymer resin (Trademark: Hibler 7125 (HVS-3): Kuraray Co., Ltd.)
25 parts by mass of ethylene-vinyl acetate copolymer resin (Trademark: Ebaslene 410P: Dainippon Ink & Chemicals, Inc.)
Basic hindered amine compound 1 part by mass Thermal degradation inhibitor 0.2 part by mass Melamine-coated ammonium polyphosphate (degree of polymerization n = 1000)
20 parts by mass Melamine cyanurate 20 parts by mass Coarse-grained titanium oxide having a mass average particle diameter of 0.8 to 1.2 μm 12% by mass
(Cover rate with aluminum oxide: 2.4% by mass)
Interference mica particles 4% by mass
(Particle size: 25 to 65 μm, coverage with a thin film having a multilayer structure of TiO ₂ / SiO ₂ / TiO ₂ : 45% by mass)
<Formulation 10> Olefin-based resin film (back side)
Polypropylene resin 50 parts by mass (Trademark: Catalloy KS-353P: Sun Allomer Co., Ltd.)
25 parts by mass of styrene-based copolymer resin (Trademark: Hibler 7125 (HVS-3): Kuraray Co., Ltd.)
25 parts by mass of ethylene-vinyl acetate copolymer resin (Trademark: Ebaslene 410P: Dainippon Ink & Chemicals, Inc.)
Basic hindered amine compound 1 part by mass Thermal degradation inhibitor 0.2 part by mass Melamine-coated ammonium polyphosphate (degree of polymerization n = 1000)
20 mass parts Melamine cyanurate 20 mass parts The obtained heat-shielding film | membrane material was used for the said test. The test results are shown in Table 1.
As is apparent from Table 1, the film materials obtained in Examples 1 to 4 have excellent heat shielding properties with a solar heat gain of 10% or less and visible light transmittances of 10 to 20%, and are not dull and soft. It was a film material showing comfortable brightness. Further, in Examples 2 and 3, an antifouling layer was formed on the infrared reflective resin layer, and the initial heat shielding and translucency were maintained even after one year of outdoor exposure.

Comparative Example 1
A heat shielding film material was produced in the same manner as in Example 1. However, the composition of the infrared reflective resin layer of Example 1 was changed as shown in the following composition 11, and only 10% by mass of coarse titanium oxide was blended without blending the interference mica particles.
<Formulation 11> Vinyl chloride-based infrared reflective resin layer (front surface)
Soft vinyl chloride resin 90% by mass
Straight vinyl chloride resin 100 parts by mass DOP (plasticizer) 55 parts by mass Epoxidized soybean oil 4 parts by mass Antimony trioxide (flameproofing agent) 6 parts by mass Ba-Zn stabilizer 2 parts by mass Mass average particle size 0.8 to 1.2μm coarse titanium oxide 10% by mass
(Cover rate with aluminum oxide: 2.4% by mass)
The obtained membrane material was subjected to the test. The test results are shown in Table 1.
As shown in Table 1, the film material of Comparative Example 1 has the same level of visible light transmittance as the film material obtained in Example 1, but the solar heat gain rate exceeds 10%. The film material was inferior in heat-shielding property and could not achieve both excellent heat-shielding property and comfortable brightness.

Comparative Example 2
A heat shielding film material was produced in the same manner as in Example 1. However, the composition of the infrared reflective resin layer of Example 1 was changed as shown in the following composition 12, and only 15% by mass of coarse titanium oxide was blended without blending the interference mica particles.
<Formulation 12> Vinyl chloride-based infrared reflective resin layer (front surface)
Soft vinyl chloride resin 85% by mass
Straight vinyl chloride resin 100 parts by mass DOP (plasticizer) 55 parts by mass Epoxidized soybean oil 4 parts by mass Antimony trioxide (flameproofing agent) 6 parts by mass Ba-Zn stabilizer 2 parts by mass Mass average particle size 0.8 to 1.2μm coarse titanium oxide 15% by mass
(Aluminum oxide coverage: 2.4% by mass)
The obtained membrane material was subjected to the test. The test results are shown in Table 1.
As is clear from Table 1, the film material of Comparative Example 2 has a lower visible light transmittance, a solar heat gain rate of more than 10%, and a poor heat shielding property compared to the film material obtained in Example 1. It was a film material that could not achieve both heat and comfortable brightness.

Comparative Example 3
A heat shielding film material was produced in the same manner as in Example 1. However, the composition of the infrared reflecting resin layer of Example 1 was changed as shown in the following composition 13, and only 20% by mass of coarse titanium oxide was blended without blending the interference mica particles.
<Formulation 13> Vinyl chloride-based infrared reflective resin layer (front surface)
Soft vinyl chloride resin 80% by mass
Straight vinyl chloride resin 100 parts by mass DOP (plasticizer) 55 parts by mass Epoxidized soybean oil 4 parts by mass Antimony trioxide (flameproofing agent) 6 parts by mass Ba-Zn stabilizer 2 parts by mass Mass average particle size 0.8 to 1.2μm coarse titanium oxide 20% by mass
(Cover rate with aluminum oxide: 2.4% by mass)
The obtained membrane material was subjected to the test. The test results are shown in Table 1.
As is clear from Table 1, the film material of Comparative Example 3 has the same level of solar heat acquisition rate as that of the film material obtained in Example 1, but the concealability of the infrared reflective resin layer is strong and visible. The light transmittance was low, less than 10%, and it was a film material that could not achieve both heat shielding and comfortable brightness.
As shown in Comparative Examples 1 to 3, when only the coarse titanium oxide was used alone without blending the interference mica particles in the infrared reflective resin layer, the heat shielding property was improved by increasing the content, but at the same time, Since the light properties also deteriorated, it was not possible to achieve both excellent heat shielding properties and comfortable brightness.

Comparative Example 4
A heat shielding film material was produced in the same manner as in Example 1. However, the composition of the infrared reflective resin layer of Example 1 was changed as shown in the following composition 14 so that only 3% by mass of interference mica particles was blended without blending coarse titanium oxide.
<Formulation 14> Vinyl chloride-based infrared reflective resin layer (front surface)
Soft vinyl chloride resin 97% by mass
Straight vinyl chloride resin 100 parts by mass DOP (plasticizer) 55 parts by mass Epoxidized soybean oil 4 parts by mass Antimony trioxide (flameproofing agent) 6 parts by mass Ba-Zn stabilizer 2 parts by mass Interference mica particles 3% by mass
(Particle size: 25 to 65 μm, coverage with a thin film having a multilayer structure of TiO ₂ / SiO ₂ / TiO ₂ : 45% by mass)
The obtained membrane material was subjected to the test. The test results are shown in Table 1.
As is clear from Table 1, the film material of Comparative Example 4 has a visible light transmittance of more than 20% compared with the film material obtained in Example 1, and the solar heat acquisition rate is also 20%. The film material was high and inferior in heat insulation, and could not achieve both heat insulation and comfortable brightness.

Comparative Example 5
A heat shielding film material was produced in the same manner as in Example 1. However, the composition of the infrared reflective resin layer of Example 1 was changed as shown in Formula 15 below, and only 10% by mass of interference mica particles were blended without blending coarse titanium oxide.
<Formulation 15> Infrared reflective resin layer Soft vinyl chloride resin 90% by mass
Straight vinyl chloride resin 100 parts by weight DOP (plasticizer) 55 parts by weight Epoxidized soybean oil 4 parts by weight Antimony trioxide (flameproofing agent) 6 parts by weight Ba-Zn-based stabilizer 2 parts by weight Interference mica particles 10% by weight
(Particle size: 25 to 65 μm, coverage with a thin film having a multilayer structure of TiO ₂ / SiO ₂ / TiO ₂ : 45% by mass)
The obtained membrane material was subjected to the test. The test results are shown in Table 1.
As is clear from Table 1, the film material of Comparative Example 5 has the same level of visible light transmittance as the film material obtained in Example 1, but the film material surface color and transmission color are iris colors. It was scary and did not show comfortable brightness. Further, the solar heat gain rate exceeded 10%, and the heat shielding property was inferior, and it was a film material that could not achieve both excellent heat shielding property and comfortable brightness.
As shown in Comparative Examples 4 and 5, when only the interference mica particles are used alone in the infrared reflective resin layer without blending coarse titanium oxide, the decrease in translucency is small even if the content is increased. On the other hand, the level of heat insulation was low, and it was not possible to achieve both excellent heat insulation and comfortable brightness.

  The heat-insulating film material of the present invention has both excellent heat-insulating properties and comfortable brightness, both of which have been difficult to achieve in the past. Especially, film structures such as tent warehouses, medium and large tents, truck hoods, and sunshade tents. By using it for forming objects, it is possible to provide a comfortable space with heat insulation and comfortable brightness, and also improve the work environment in summer and reduce the energy consumed for lighting, cooling, etc. Things will be possible.

Claims (5)

  A film material comprising a base fabric made of a fiber material and an infrared reflecting resin layer formed on at least one surface thereof, and having a visible light transmittance (JIS Z8722) of 10 to 20%, the infrared ray A heat-shielding film material, wherein the reflective resin layer is composed of a thermoplastic resin including coarse titanium oxide having a weight average particle diameter of 0.6 to 1.5 μm and interference mica particles.   The said infrared reflective resin layer contains 5-15 mass% of the said coarse grain titanium oxide with respect to the mass of the said infrared reflective resin layer, and the said interference mica particle of 1-5 mass%. Thermal barrier film material.   The thermal barrier film material according to claim 1 or 2, wherein the interference mica particles are coated with a titanium oxide thin film or a thin film having a multilayer structure of titanium oxide / silicon oxide / titanium oxide.   The thermal barrier film material according to any one of claims 1 to 3, wherein an antifouling layer is further formed on the infrared reflective resin layer.   The heat-shielding film | membrane material of any one of Claims 1-4 which has a solar-heat acquisition rate (JIS R3106) of 10% or less.