JP2016205569A - Heat shielding sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat shielding sheet that comprises a layer capable of reflecting infrared ray and a heat storage layer configured to store heat having failed to be reflected.SOLUTION: A heat shielding sheet 10 has a near infrared reflection layer 1 and a heat storage layer 2. The neat infrared reflection layer 1 may has one or both of metal compound particles and a metal layer, or may be a laminate of a low refractive index layer and a high refractive index layer. The heat storage layer 2 may be a layer having a heat storage capsule on one surface of a base material, and in this case, the base material is preferably a drawn porous sheet or nonwoven fabric.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heat shield sheet, and more particularly, a heat shield sheet that provides a heat storage layer on the back surface of the heat shield layer, stores heat that could not be reflected by the heat shield layer, and suppresses the heat transfer rate. About.

  In recent years, an increasing number of buildings, such as houses, adopt a construction method that improves airtightness and heat insulation from the viewpoint of energy saving. In particular, the increase in airtightness makes it difficult for water vapor generated from the inside of the building to be released outside the building. As a result, dew condensation occurs on the wall of the building, causing mold and corrosion. Even in highly airtight houses, there are many cases where countermeasures against radiant heat using infrared rays are insufficient.

  As a countermeasure against radiant heat by infrared rays, it has been proposed to employ a heat shield sheet including a metal layer such as aluminum as an infrared reflection layer. For example, Patent Document 1 proposes a house wrap material in which a metal vapor-deposited layer and a protective layer are sequentially laminated on one surface of a moisture-permeable and waterproof film, and a fabric is laminated on the other surface of the film. This technique is configured such that the infrared reflectance on the protective layer side is 30% or more at a wavelength of 10 μm, and is said to exhibit good heat shielding properties. Patent Document 2 proposes a laminated material in which a metal vapor deposition layer having infrared reflectivity is provided on a cloth substrate containing an infrared absorbent.

  However, in the technique of Patent Document 1, the protective layer provided to prevent oxidation of the metal vapor deposition layer reduces the infrared reflectance of the metal vapor deposition layer, and the infrared rays that could not be reflected are absorbed, and the metal vapor deposition layer with high thermal conductivity is absorbed. Heat is transferred from the inside to the inside of the house. Moreover, in the technique of patent document 2, since there is little heat capacity of the infrared absorber contained in a fabric base material, the movement of the heat which cannot be absorbed cannot be suppressed.

  With respect to such a problem, Patent Document 3 discloses that a microcapsule containing a heat storage material having a melting point of 0 to 40 ° C. has one side of a sheet-like support having a thermal conductivity of 0.01 to 0.1 kcal / m · hr · deg. A heat storage sheet coated on the surface has been proposed. In this technology, a heat storage layer that stores heat that could not be reflected by the infrared reflective layer is provided, and the stored heat is gradually released to maintain a comfortable room temperature for a long time even if a large change occurs in the outside temperature. It is supposed to be possible.

JP2013-76210A JP 2005-238542 A JP 2003-306672 A

  However, in the technique of Patent Document 3, heat transfer can be suppressed by the heat storage material and the heat insulating material, but when the amount of heat is large, the heat storage amount is saturated and becomes a limit.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a heat shield sheet using a layer that can reflect infrared rays and a heat storage layer that stores heat that could not be reflected. is there.

  The heat shield sheet according to the present invention for solving the above-described problems is characterized by having a near-infrared reflective layer and a heat storage layer.

  In the heat shield sheet according to the present invention, the near-infrared reflective layer may be configured to have one or both of metal compound particles and a metal layer. As the metal compound particles, ATO or ITO particles are preferable, and as the metal layer, an aluminum layer is preferable.

  In the heat shield sheet according to the present invention, the heat storage layer can be configured to be a layer having a heat storage capsule on one surface of the substrate. A preferable heat storage layer preferably has a high heat capacity.

  In the heat shield sheet according to the present invention, the base material is preferably a stretched porous sheet or a nonwoven fabric.

  The heat shield sheet according to the present invention can be configured to have a protective layer on the near-infrared reflective layer.

  The heat shield sheet according to the present invention can be configured such that a heat insulating layer is provided on the opposite surface of the heat storage layer to the side on which the near-infrared reflective layer is provided.

  In the heat shield sheet according to the present invention, the heat insulating layer can be configured to be a resin foam.

  In the heat shield sheet according to the present invention, it can be used as an architectural sheet or a window sheet, and the heat storage layer side can be arranged on the heat insulating material or the outer surface of the window.

  ADVANTAGE OF THE INVENTION According to this invention, the thermal insulation sheet | seat using the layer which can reflect infrared rays, and the thermal storage layer which accumulates the heat which could not be reflected, and its manufacturing method can be provided.

It is typical sectional drawing which shows an example of the heat insulation sheet which concerns on this invention. It is typical sectional drawing which shows another example of the heat insulation sheet which concerns on this invention. It is a schematic diagram which shows the example of installation of the heat shield sheet which concerns on this invention.

  The heat shield sheet and the manufacturing method thereof according to the present invention will be described. The present invention is not limited to the form of the drawings and the following description as long as the technical features are included.

[Heat shield sheet]
As shown in FIGS. 1 and 2, the heat shield sheet 10 according to the present invention includes a near-infrared reflective layer 1 and a heat storage layer 2. Since the near-infrared reflective layer 1 reflects near-infrared rays and can absorb absorbed infrared rays and far-infrared rays in the thermal storage layer 2 in the heat-shielding sheet 10, heat directly transmitted by far-infrared heat rays ( (Radiant heat) is absorbed and heat transfer can be prevented, and the heat transfer rate can be suppressed. In addition, since the transmitted radiant heat can be accumulate | stored in the thermal storage layer 2, heat insulation can be improved. This radiant heat is directly transmitted by far-infrared heat rays. For example, in a house exposed to sunlight, it is transmitted in the form of electromagnetic waves directly from the high-temperature wall surface (insulating material surface) to the low-temperature wall inner surface (insulating material inner surface). . Therefore, the heat shield sheet 10 according to the present invention is a heat shield sheet using a layer that can reflect infrared rays (near infrared reflection layer 1) and a layer that stores heat that could not be reflected (heat storage layer 2). Further, the heat shield sheet 10 preferably has water permeability, waterproofness and tensile strength.

  Hereinafter, the components of the heat shield sheet will be described in detail. In addition, the heat shield sheet 10A shown in FIG. 1 has the protective layer 3, the near-infrared reflective layer 1, and the heat storage layer 2 arranged in that order. The heat shield sheet 10B shown in FIG. The near-infrared reflective layer 1, the heat storage layer 2, and the heat insulation layer 4 are arranged in that order. FIG. 3 is a construction example of the heat shield sheet 10.

(Near-infrared reflective layer)
The near-infrared reflective layer 1 is a layer capable of reflecting the near-infrared, and preferably has a near-infrared reflectivity, does not hinder moisture permeability, and does not hinder waterproofness. . Therefore, it is preferable that the near-infrared reflective layer 1 can reflect near-infrared light and can transmit at least some moisture.

  Specifically, the near-infrared reflective layer 1 has one or both of metal compound particles and a metal layer. By having these, near infrared rays can be reflected. Examples of the metal compound particles include titanium oxide, antimony-doped tin oxide (ATO), and tin-doped indium oxide (ITO). Further, inorganic particles made of antimony, chrome lead, cadmium, ultramarine blue, cobalt blue, and the like, and organic particles such as azomethine azo and perylene black can be used in place of the metal compound particles or together with the metal compound particles. You may use these as a near-infrared reflective particle which named these generically. Moreover, as a metal layer, the layer which consists of aluminum or its alloy, gold | metal | money, silver, platinum, etc. can be mentioned. Metal compound particles and a metal layer may be used in combination.

  The average particle size of the metal compound particles is preferably in the range of 0.1 μm or more and 2.0 μm or less. By the metal compound particles having an average particle diameter within this range, near infrared rays within the range of 780 nm to 2 μm can be effectively reflected. In addition, an average particle diameter can be evaluated by the value measured with the scanning electron microscope. On the other hand, the thickness of the metal layer is preferably in the range of 30 nm to 100 nm. By the metal layer having a thickness within this range, near infrared rays within a range of 780 nm to 2.5 μm can be effectively reflected. The thickness can be measured with a scanning electron microscope.

  The metal compound particles and the metal layer are provided on the resin layer. The metal compound particles are supported on the surface (one surface or both surfaces) of the resin layer or mixed in the resin layer. The metal layer is provided on the surface (one side or both sides) of the resin layer. The obtained metal compound particles are carried on the surface or mixed inside, but the metal layer is formed or bonded to the surface of the resin layer. The film can be formed by various film forming means, for example, vapor deposition, sputtering or the like.

  The resin layer which comprises the near-infrared reflective layer 1 should just have the role as a base material with which a metal compound particle or a metal layer is provided. Furthermore, in order to give the heat-shielding sheet 10 moisture permeability and waterproof properties, it is preferable that the heat shielding sheet 10 has moisture permeability that allows at least moisture to pass through, and further has waterproofness that prevents water from passing therethrough. Is preferred. In order to give the resin layer at least moisture permeability, the resin layer is preferably porous.

  The resin layer preferably includes at least a resin material and an inorganic material. The resin material acts to stretch the resin layer greatly by the stretching treatment, and the inorganic material acts to create voids in the resin layer after greatly stretching by the stretching treatment. As a result, the resin layer becomes porous. To work.

  The resin material is a curable resin obtained by curing a curable resin, and may be a thermosetting resin obtained by curing a thermosetting resin or an ionizing radiation curable resin obtained by curing an ionizing radiation curable resin, but a thermosetting resin is preferably exemplified. be able to. Resin materials include polyester resins such as polyethylene terephthalate and polyethylene naphthalate, polyolefin resins such as polyethylene and polypropylene, polystyrene resins, polyamide resins, polyvinyl chloride resins, polycarbonate resins, polyacrylic resins, polyimides Resin, polytetrafluoroethylene resin and the like. Among these, polyolefin resins can be preferably mentioned. Examples of the polyolefin resin include polyethylene, polypropylene, polybutene, polymethylpentene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA), and ethylene-methyl. Examples thereof include a methacrylate copolymer (EMMA), an ethylene-propylene-butene copolymer, and a polyolefin-based thermoplastic elastomer. The resin layer is composed of one or more of these.

  Among these, polyethylene is preferable, and for example, low density polyethylene (LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), linear low density polyethylene (LLDPE), and the like can be preferably used. These various polyethylenes may be used individually by 1 type, and 2 or more types may be mixed and used for them. In particular, it is preferable to use a mixture of low density polyethylene and high density polyethylene. Since these polyethylenes have good elongation and exhibit, for example, an elongation of 100% or more, they are preferable as components of the heat shielding sheet 10.

  Examples of the inorganic material include calcium carbonate, titanium oxide, and silicon oxide. Of these, calcium carbonate is preferable. The size of the inorganic material is preferably in the range of, for example, 0.1 μm or more and 10 μm or less μm in average particle diameter. An inorganic material having an average particle diameter within this range can generate voids in the resin layer after being stretched. The generation of the voids is caused by the difference in elongation between the inorganic material that does not stretch and the resin material that stretches when the resin layer is stretched. Can be generated. By extending | stretching after including such an inorganic material in a resin layer, the resin layer after an extending | stretching process becomes porous, and can provide moisture permeability and waterproofness.

  It is preferable that the content ratio of the resin material and the inorganic material in the resin layer is mass% and is in the range of “resin material / inorganic material” = 9/1 to 5/5. Within this range, moisture permeability and waterproofness can be imparted to the resin layer after being stretched.

  This resin layer can be obtained by stretching the resin layer before stretching to 100% or more, usually 200% or more.

  The porosity of the resin layer can be evaluated with an optical microscope, and the value can be expressed as a range of 10% to 60%.

When the resin layer is not evaluated alone with respect to the porosity, it is preferable to evaluate the moisture permeability resistance (unit: m ² · S · Pa / μg) of the heat insulating material 10 as shown in an example described later. The moisture permeability resistance is directly affected by the moisture permeability of the resin layer, and the magnitude of the moisture permeability resistance of the heat insulating material 10 may be evaluated as synonymous with the magnitude of the moisture permeability of the resin layer. The measurement of moisture permeability resistance can be performed by the A-1 method in JIS L 1099 described in JIS A 6111. As a preferable range of moisture permeation resistance, a range of 0.01 to 0.19 m ² · S · Pa / μg can be given. The resin layer having moisture permeability resistance within this range has a property of allowing moisture to pass through but not allowing water to pass through, and has good moisture permeability and good waterproof properties. When the moisture permeation resistance is less than 0.01 m ² · S · Pa / μg, water easily passes and the waterproof property is lowered. If the moisture permeation resistance exceeds 0.19 m ² · S · Pa / μg, it becomes difficult for moisture to pass therethrough and the moisture permeability decreases.

  In addition, since the resin layer is stretched, fine voids and cracks are generated in the resin layer by the stretching process, and the resin layer becomes porous. As a result, the resin layer can ensure moisture permeability.

  When a metal layer is provided on such a porous resin layer, the surface of the resin layer is uneven due to the inorganic material contained in the resin layer. Therefore, the metal layer is deposited on the resin layer by physical film-forming means such as vapor deposition. If provided, the uneven surface will form a film in a discontinuous form following the uneven shape, and the non-continuous portion will exhibit porosity. This porosity also allows the metal layer to pass moisture. Since it has been confirmed that there is no significant difference in the moisture permeability resistance between the case where the metal layer is provided on the resin layer and the case where the metal layer is not provided, the porosity of the resin layer after the metal layer is provided Can be inferred to be within the range of 10% or more and 60% or less, as described above.

  Further, since the metal layer has porosity but functions as a reflective layer, it can reflect, for example, near infrared rays in the range of 780 nm to 2500 nm and infrared rays in the range of 2 μm to 20 μm by 70% or more. it can.

(Heat storage layer)
The heat storage layer 2 is a layer that constitutes a heat shield sheet and can store near infrared rays and far infrared rays that cannot be reflected by the near infrared reflection layer 1. By providing this heat storage layer 2, heat (radiant heat) directly transmitted by the far-infrared heat ray can be absorbed and prevented from being transferred, and the heat transfer speed can be suppressed. Examples of the heat storage layer 2 that can play such a role include a layer having a heat storage capsule inside or on the surface (one side or both sides) of the substrate.

  In the heat storage layer 2 that the heat storage capsule has inside or on the surface of the base material, the base material is not particularly limited as long as the heat storage capsule can be supported. For example, a hard polyurethane resin, a foamed polystyrene resin, a foamed polyethylene resin, a wool sheet , Glass sheets, rock wool and the like. Preferably, acrylic fibers, polyamide fibers such as nylon, polyester fibers such as polyethylene terephthalate and polybutylene terephthalate, polyolefin fibers such as polyethylene and polypropylene, vinylon fibers, polyurethane fibers, polyvinyl chloride fibers, acetate fibers, cupra fibers, rayon fibers And non-woven fabric obtained by making a cellulose fiber or the like in a dry or wet manner.

The density of the substrate is preferably in the range of 20 g / cm ³ or more and 150 g / cm ³ or less, and the thickness is preferably in the range of 20 μm or more and 200 μm or less.

  The heat storage capsule is formed by, for example, an encapsulation method by a composite emulsion method (Japanese Patent Laid-Open No. Sho 62-1452), a method of spraying a thermoplastic resin on the surface of the heat storage material particles (Japanese Patent Laid-Open No. 62-45680), or a heat storage material. A method of forming a thermoplastic resin in the liquid on the surface of the particles (JP 62-149334), a method of polymerizing and coating the monomer on the surface of the heat storage material particles (JP 62-225241), by interfacial polycondensation reaction A method described in a method for producing a polyamide-coated microcapsule (JP-A-2-258052) or the like can be applied.

  Examples of the film material of the heat storage capsule include polystyrene, polyacrylonitrile, polyamide, polyacrylamide, ethyl cellulose, polyurethane, and aminoplast resin obtained by a technique such as an interfacial polymerization method or an in situ method. In addition, synthetic resins and natural resins using a coacervation method of gelatin and carboxymethyl cellulose or gum arabic can be given. Among these, microcapsules using urea formalin resin and melamine formalin resin film by an in situ method are preferably applicable.

  The particle size of the heat storage capsule is preferably 10 μm or less, particularly preferably 5 μm or less. If it exceeds 10 μm, the heat storage capsule may be easily broken.

  The heat storage layer 2 is preferably configured to have a heat capacity of 100 J / g or more. When the heat capacity is 100 J / g or more, the amount of heat that cannot be reflected by the near-infrared reflective layer 1 can be effectively absorbed. The heat capacity can be measured by differential thermal operation calorimetry. If the heat capacity is less than 100 J / g, the amount of heat that could not be reflected by the near-infrared reflective layer 1 cannot be absorbed, and the heat is conducted into the room.

(Protective layer)
You may have the protective layer 3 on the near-infrared reflective layer. The protective layer 3 is a layer that is optionally provided on the heat shield sheet 10 and works to prevent oxidation of the near-infrared reflective layer 1 and to maintain the heat-shielding property by the near-infrared reflective layer 1. is there. The protective layer 3 is preferably formed of an acrylic urethane-based resin material, and the moisture permeability resistance is 0.19 m ² · S · Pa / so as not to hinder the effect of the heat shield sheet 10 according to the present invention. It is preferable that it is provided in a porous manner within a range of μg or less and waterproofness of 8 kPa or more.

  Since the protective layer 3 is formed of a resin material, it is provided as it is on the near-infrared reflective layer 1 to prevent the near-infrared reflective layer 1 from being oxidized. Examples of the resin material for the protective layer include acrylic urethane resin materials.

  The thickness of the protective layer 3 is preferably in the range of 0.3 μm or more and 2 μm or less. By providing the protective layer 3 within this range, it is possible to reflect 70% or more of near infrared rays in the range of 780 nm to 2500 nm and infrared rays in the range of 2 μm to 20 μm by the near infrared reflecting layer 1.

(Insulation layer)
The heat shield sheet 10 may be provided with a heat insulating layer 4 as shown in FIG. The heat insulation layer 4 can be provided on the opposite surface of the heat storage layer 2 to the side on which the near infrared reflection layer 1 is provided.

  As the heat insulation layer 4, a resin foam is preferable. Since the resin foam is porous because it is in a foamed state, it has heat insulating properties and water permeability. The resin foam is formed by providing a foam-forming material layer containing at least a resin composition and a foaming agent, and foaming the resin foam-forming material layer. The resin composition constituting the resin foam-forming material layer is a composition for constituting the bulk portion of the highly foamed heat insulating material, and the foaming agent is an agent for forming bubbles. The resin composition is preferably a curable resin composition containing a curable resin and a crosslinking agent.

  The curable resin may be a thermosetting resin or an ionizing radiation curable resin, but a thermosetting resin can be preferably mentioned. Examples of the heat insulating layer 4 include soft urethane foam, hard urethane foam, beaded polystyrene foam, and phenol foam. Among these, a hard urethane foam is preferable in terms of adhesiveness and strength. Since these detailed contents are the same as the resin material described in the explanation section of the “near-infrared reflective layer 1”, the description thereof is omitted here.

  A resin composition containing a curable resin and a crosslinking agent is cured before foaming with a foaming agent or simultaneously with foaming, but the degree of cure is within a range that is plasticized to such an extent that the foaming phenomenon occurs effectively. It is necessary to let Therefore, in selecting the curable resin and the cross-linking agent, it is desirable that the point be selected.

  The foaming agent is contained in the foam-forming material layer, and is used for foaming by foaming treatment to form a highly foamed resin foam. As the foaming agent, a thermal decomposition type foaming agent is used, and for example, an organic foaming agent or an inorganic foaming agent can be selected and used. As the various foaming agents, one type is usually used, but two or more types may be included.

  Examples of other additives include foaming aids, inorganic fillers, pigments, antioxidants, flame retardants, heat stabilizers, and the like, which are necessary for the resin composition as long as the effects of the present invention are not impaired. It can be blended according to. Since these additives can be the same as those used for general cushioning materials, heat insulating materials, and the like, description thereof is omitted here.

  Various methods can be applied to the means for foaming the resin foam-forming material layer into the resin foam. For example, a continuous lamination method can be applied. The bubbles contained in the resin foam after the foaming treatment have a porosity in the range of 80% to 98%. Such a resin foam can impart heat insulation and moisture permeability to the heat shield sheet 10. In addition, it is preferable that the total thickness of the thermal insulation sheet 10 exists in the range of 50 micrometers or more and 200 micrometers or less.

(Laying of heat shield sheet)
As shown in FIG. 3, the heat shield sheet 10 can be used as a building sheet or a window sheet, and the heat storage layer 2 side can be arranged on a housing wall (heat insulating material) or an outer surface of a window.

  The present invention will be described in more detail with reference to examples and comparative examples.

[Example 1]
A heat shield sheet 10 having heat storage performance was produced. First, a polyester nonwoven fabric having a thickness of 3 mm and a basis weight of 110 g / m ² was prepared. The non-woven fabric was coated with a heat storage material slurry having a freezing point of 25 ° C. ± 2 ° C. (manufactured by Miki Riken Kogyo Co., Ltd., PMCD-25, heat capacity of about 100 J / g). The coating was performed with a curtain coating apparatus so that the coating amount was 1000 g / m ^2, and dried after coating to provide the heat storage layer 2.

High density polyethylene (Nippon Polychem Co., Ltd., trade name Novatec HD, HJ580, melting point 134 ° C., density 0.960 g / cm ³ ), low density polyethylene (Tosoh Corporation, trade name: Petrocene 208), average A calcium carbonate powder having a particle size of 2 μm was mixed with resin: calcium carbonate = 1: 1, and an unstretched sheet having a thickness of 0.4 mm was produced by an extruder. Next, this unstretched sheet was stretched 4 times in the longitudinal direction to produce a uniaxially stretched 85 μm resin layer. On one surface of this resin layer, a metal layer made of aluminum having a thickness of 40 nm ± 4 nm was formed by EB vapor deposition. The metal layer is formed in a non-continuous form following the surface irregularity shape of the resin layer, and the non-continuous portion exhibits porosity. Thus, the near-infrared reflective layer 1 composed of the resin layer and the metal layer was formed.

  Further, a protective layer 3 made of urethane was printed on the entire surface of the metal layer with a gravure printing machine, and the protective layer 3 was laminated so that the dry thickness was 0.5 μm. Thus, a sheet in which the protective layer 3 was provided on the metal layer constituting the near-infrared reflective layer 1 was produced. In addition, this sheet | seat is a heat insulation moisture permeability waterproof sheet which has moisture permeability and waterproofness.

  Finally, a nonwoven fabric provided with the heat storage layer 2 and a heat-insulating and moisture-permeable waterproof sheet composed of the near-infrared reflective layer 1 provided with the protective layer 3 were heat-laminated. Thermal lamination was performed by stacking the nonwoven fabric and the resin layer side of the heat-insulating and moisture-permeable waterproof sheet. Thus, the heat shield sheet 10 was produced.

[Comparative Example 1]
In Example 1, the nonwoven fabric provided with the heat storage layer was not heat laminated, and only the heat-insulating and moisture-permeable waterproof sheet was used.

[Comparative Example 2]
In Example 1, the heat-insulating and moisture-permeable waterproof sheet was not heat laminated, but only the nonwoven fabric provided with the heat storage layer.

[Measurement and evaluation]
The reflectance and absorption rate of 2 μm to 20 μm were measured for the sheets prepared in Example 1 and Comparative Examples 1 and 2. In Example 1 and Comparative Example 1, a high reflectance of 70% or more on average was confirmed with aluminum. In Comparative Example 2, the reflectance was low due to the color of the nonwoven fabric and the heat storage capsule, resulting in a high absorption rate. In the heat shield sheet 10 of Example 1 to which the heat storage capsule was added, an absorption rate of about 20% or more due to the heat storage capsule was confirmed. In Comparative Example 1, the absorption rate was less than 15%. From this, in Example 1, the high reflection of the heat ray and the absorption by the heat storage material having a high heat capacity were confirmed.

DESCRIPTION OF SYMBOLS 1 Near-infrared reflective layer 2 Heat storage layer 3 Protective layer 4 Heat insulation layer 10 (10A, 10B) Thermal insulation sheet 11 Housing wall (heat insulation material)
12 External 13 Internal

Claims (8)

  A heat insulating sheet comprising a near-infrared reflective layer and a heat storage layer.   The heat shield sheet according to claim 1, wherein the near-infrared reflective layer has one or both of metal compound particles and a metal layer.   The thermal insulation sheet according to claim 1 or 2 in which said thermal storage layer is a layer which has a thermal storage capsule in one side of a substrate.   The heat insulating sheet according to claim 3, wherein the base material is a stretched porous sheet or a nonwoven fabric.   The thermal insulation sheet according to any one of claims 1 to 4, further comprising a protective layer on the near-infrared reflective layer.   The heat insulating sheet according to any one of claims 1 to 5, wherein a heat insulating layer is provided on an opposite surface of the heat storage layer to the side on which the near-infrared reflective layer is provided.   The heat insulating sheet according to claim 6, wherein the heat insulating layer is a resin foam.   The heat shield sheet according to any one of claims 1 to 7, wherein the heat shield sheet is used as an architectural sheet or a window sheet, and the heat storage layer side is disposed on an outer surface of the heat insulating material or the window.

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