JP2016211151A - Heat insulating material and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulating material having airtightness and a heat-insulating property, and having moisture permeability, waterproofness, and high infrared reflective ability, and a method for manufacturing the same.SOLUTION: A porous resin foam 3, a porous resin layer 1, and a porous metal layer 2 are arranged in a heat insulating material 10 in this order. In the heat insulating material 10, a protective layer 4 may be provided on the porous metal layer 2. The heat insulating material 10 can be manufactured by a method having a step for preparing a laminate having the porous metal layer on one surface of the porous resin layer and a resin foam forming material layer on the other surface, and a step for foaming the resin foam forming material layer constituting the laminate.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heat insulating material and a manufacturing method thereof, and more particularly to a heat insulating material having moisture permeability and waterproofness, and a manufacturing method thereof.

  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.

  In order to provide such a problem, Patent Document 1 provides a heat-shielding material that can be easily constructed even in a narrow space such as the ceiling or under the floor of an existing building, on one side or both sides of a chemical fiber sheet such as polyester or glass, A heat shielding material provided with a material having high reflectivity with respect to radiant heat such as aluminum foil has been proposed. However, although this heat shielding material has high infrared reflectance and waterproofness, it has low moisture permeability and is likely to cause condensation and mold in the wall.

So, in patent document 2, as a house wrap material which has heat insulation, moisture permeability, and waterproofness, a metal vapor deposition layer and a protective layer are laminated in order on one side of a moisture-permeable waterproof film made of stretched polyolefin resin, A house wrap material in which a fabric is laminated on the other surface of the film, the infrared reflectance on the protective layer side is 30% or more at a wavelength of 10 μm, and the moisture permeability is 0.06 to 0.19 m ² · s · Pa. A house wrap material of / μg has been proposed.

JP 2013-238098 A JP2013-76210A

  In a wall of a building such as a house, there is a demand for a heat insulating material that has airtightness and heat insulation, moisture permeability, waterproofness, and high infrared reflectivity.

  Moreover, in such a heat insulating material, it is good to use the house wrap material retrofitted with a tucker or the like as in the house wrap material proposed in Patent Document 2, but the house wrap material is used in the heat insulating material manufacturing process. When used as a face material, the house wrap material must be combined with a high-strength fabric, so that there is a problem that it is difficult to stretch and processing defects are likely to occur. Furthermore, the arrangement of the house wrap material and the manufacturing process are complicated by the arrangement of the fabric on the other side of the house wrap material.

  The present invention has been made in order to solve the above-mentioned problems, and its object is to provide a heat insulating material having air tightness and heat insulation, moisture permeability, waterproofness, and high infrared reflectivity. It is in. Moreover, the other objective is to provide the manufacturing method which can manufacture such a heat insulating material easily.

  (1) A heat insulating material according to the present invention for solving the above problems is characterized in that a porous resin foam, a porous resin layer, and a porous metal layer are arranged in that order. To do.

  According to this invention, since the resin foam, the resin layer, and the metal layer are all porous or porous, the resin foam has moisture permeability, the resin foam has heat insulation, and the resin layer has waterproofness. The metal layer has heat shielding properties (infrared or near infrared reflectivity). As a result, it is possible to provide a heat insulating material that has heat insulating properties, moisture permeability, waterproofness, and high infrared reflectivity. Moreover, since the heat insulating material is provided with a waterproof resin layer, the heat insulating material as a whole has airtightness.

  The heat insulating material according to the present invention can be configured such that a protective layer is provided on the porous metal layer.

  The heat insulating material which concerns on this invention WHEREIN: It can comprise so that the said resin foam may be arrange | positioned and used inside a wall.

  (2) The heat insulating material manufacturing method according to the present invention for solving the above-described problems is a heat insulating material in which a porous resin foam, a porous resin layer, and a porous metal layer are arranged in that order. A method for producing a material, comprising: preparing a laminate having a porous metal layer on one surface of a porous resin layer and a resin foam-forming material layer on the other surface; And the step of foaming the resin foam-forming material layer constituting the laminate.

  According to the present invention, after preparing a laminate having a porous metal layer on one surface of a porous resin layer and a resin foam forming material layer on the other surface, the resin foam forming material is prepared. Since the material layer is foamed, it is possible to produce a heat insulating material in which a porous resin foam, a porous resin layer, and a porous metal layer are arranged in that order. This heat insulating material has a heat insulating property by a resin foam, has a waterproof property by a resin layer, and has a heat shielding property (infrared ray or near infrared ray reflectivity) by a metal layer. It becomes the heat insulating material which has wetness, waterproofness, and high infrared reflectivity. Moreover, since the heat insulating material is provided with a waterproof resin layer, the heat insulating material as a whole has airtightness.

  In the method for manufacturing a heat insulating material according to the present invention, the laminate includes a step of forming a porous metal layer on one surface of the porous resin layer, and a resin on the other surface of the porous resin layer. You may form by the process of forming the foam formation material layer.

  In the method for manufacturing a heat insulating material according to the present invention, the step of forming a porous metal layer on one surface of the porous resin layer includes stretching a pre-formed resin layer to obtain a porous resin layer. It can be composed of a step and a step of forming a metal layer on the porous resin layer to form a porous metal layer.

  In the manufacturing method of the heat insulating material which concerns on this invention, you may have the process of providing a protective layer on the said porous metal layer.

  ADVANTAGE OF THE INVENTION According to this invention, while having airtightness and heat insulation, the heat insulating material which has moisture permeability, waterproofness, and high infrared reflectivity can be provided. Moreover, the manufacturing method of the heat insulating material which can be manufactured easily can be provided.

It is typical sectional drawing which shows an example of the heat insulating material which concerns on this invention. It is process drawing which shows an example of the manufacturing process of the heat insulating material which concerns on this invention.

  The heat insulating material 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.

[Insulating material and manufacturing method thereof]
As shown in FIG. 1, a heat insulating material 10 according to the present invention includes a porous resin foam 3, a porous resin layer 1, and a porous metal layer 2 arranged in that order. Furthermore, as shown in FIG. 1, the protective layer 4 may be provided on the porous metal layer 2. Such a heat insulating material 10 has moisture permeability because the resin foam 3, the resin layer 1, and the metal layer 2 are all porous or porous, and has heat insulation properties by the resin foam 3. It has waterproofness and has a heat shielding property (infrared ray or near infrared ray reflectivity) by the metal layer 2. As a result, it is possible to provide a heat insulating material that has heat insulating properties, moisture permeability, waterproofness, and high infrared reflectivity. Moreover, since the heat insulating material 10 is equipped with the resin layer 1 which has waterproofness, it has airtightness as the whole heat insulating material. In addition, this heat insulating material 10 is normally used by arranging the resin foam 3 inside the wall.

  As shown in FIG. 2, for example, such a heat insulating material 10 has a porous metal layer 2 on one surface of a porous resin layer 1 and a resin foam forming material layer 3a on the other surface. It can preferably be manufactured by a method comprising a step of preparing a laminate 10a having a structure and a step of foaming the resin foam-forming material layer 3a constituting the laminate 10a. In this method, after the laminate 10a is prepared, the resin foam-forming material layer 3a is foamed, so that the foaming causes the porous resin foam 3, the porous resin layer 1, and the porous metal. The heat insulating material 10 which has the said effect by which the layer 2 is arrange | positioned in that order can be manufactured.

  Hereinafter, each structure of a heat insulating material is demonstrated in detail. In addition, about a code | symbol, each porous layer which comprises the heat insulating material 10 is represented with the resin layer 1, the metal layer 2, and the resin foam 3 (refer FIG. 1), and comprises the laminated body 10a before manufacturing the heat insulating material 10. These layers are represented by a porous resin layer 1, a porous metal layer 2, and a resin foam-forming material layer 3a (see FIG. 2).

[Resin layer]
As shown in FIG. 1, the porous resin layer 1 (hereinafter, also simply referred to as “resin layer 1”) constitutes a heat insulating material 10, and includes a porous resin foam 3 and a porous metal layer 2. It is placed between them. The resin layer 1 is porous but waterproof. Therefore, the resin layer 1 has a property of allowing moisture to pass but not passing water. Moreover, since this resin layer 1 has waterproofness, the heat insulating material 10 provided with the resin layer 1 will have airtightness as a whole heat insulating material.

  The resin layer 1 includes at least a resin material and an inorganic material. The resin material acts so that the resin layer is greatly elongated by the stretching treatment, and the inorganic material acts so as to generate voids in the resin layer 1 after being largely elongated by the stretching treatment. Works to make it porous.

  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 1 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, 100% or more elongation, they are preferable as components of the heat insulating material 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 in terms of average particle size. An inorganic material having an average particle diameter within this range can generate voids in the resin layer 1 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 1 after an extending | stretching process becomes porous, and can provide moisture permeability and waterproofness.

  The content ratio of the resin material and the inorganic material in the resin layer 1 is preferably in the range of “resin material / inorganic material” = 9/1 to 5/5 in mass%. Within this range, moisture permeability and waterproofness can be imparted to the resin layer 1 after being subjected to the stretching treatment.

  This resin layer 1 can be obtained by stretching the resin layer before stretching to 100% or more, usually 200% or more.

  The porosity of the resin layer 1 can be evaluated with an optical microscope, and the value can be expressed as a range of 10% to 50%.

In the case where the resin layer 1 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 Examples described later. The moisture permeability resistance is directly influenced by the moisture permeability of the resin layer 1, 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 1. 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 1 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 waterproofness. 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.

[Metal layer]
The porous metal layer 2 (hereinafter also simply referred to as “metal layer 2”) is a porous layer disposed on one surface of the resin layer 1 and has a heat shielding property (infrared ray or near infrared ray reflectivity). Acts as a layer. Since the metal layer 2 is porous, moisture can be transmitted, and the heat insulating material 10 can be provided with good moisture permeability and heat shielding properties.

  Examples of the constituent material of the metal layer 2 include aluminum having good infrared or near-infrared reflectivity or an alloy thereof, gold, silver, or platinum. The metal layer 2 is formed by depositing such a metal material by vapor deposition or sputtering. As shown in FIG. 2B, the metal layer 2 is provided on one surface of the resin layer 1 after the stretching treatment, so that the metal layer 2 follows the uneven shape or the like of the porous surface of the resin layer 1. The film is formed in a discontinuous form, and the non-continuous part exhibits porosity. Due to this porosity, the metal layer 2 can also 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 2 is provided on the resin layer 1 and the case where the metal layer 2 is not provided, the resin layer after the metal layer 2 is provided It can be inferred that the porosity of No. 1 is in the range of 10% to 50%, as described above.

  Moreover, since the metal layer 2 has porosity but functions as a reflection layer, it reflects, 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. Can do.

  The thickness of the metal layer 2 is preferably in the range of 30 nm to 100 nm. By setting the thickness within this range, the reflectance of the metal layer 2 becomes 70% or more even when the porosity is shown.

[Resin foam]
As shown in FIG. 1, the resin foam 3 constitutes a heat insulating material 10 and is disposed in contact with the porous resin layer 1. Since the resin foam 3 is porous because it is in a foamed state, it has heat insulating properties and water permeability.

  The resin foam 3 is formed by providing a foam forming material layer 3a (see FIG. 2C) including at least a resin composition and a foaming agent, and foaming the resin foam forming material layer 3a. The The resin composition constituting the resin foam-forming material layer 3a is a composition for constituting a bulk portion of a 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. In addition, if it is in the range which does not inhibit the effect of this invention, the foam formation material layer 3a may contain other compounds and materials other than a resin composition and a foaming agent.

  Examples of the resin foam 3 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.

  The resin foam 3 will be described below by taking a hard urethane foam as an example. The rigid urethane foam is a so-called rigid urethane foam mainly formed by a reaction between a hydroxyl group (OH group) and an isocyanate group, and also includes an isocyanurate foam that is generally included in the definition of the rigid urethane foam. The rigid urethane foam is formed by mixing a polyol compound having a hydroxyl group (OH group) and an isocyanate compound having an isocyanate group, and foaming and curing.

  The isocyanate compound is a component that reacts with the polyol compound to form a urethane prepolymer. The isocyanate compound is a compound having two or more isocyanate (NCO) groups in the molecule. For example, TDI (for example, 2,4-tolylene diisocyanate (2,4-TDI), 2,6-tolylene diisocyanate ( 2,6-TDI)), MDI (eg, 4,4′-diphenylmethane diisocyanate (4,4′-MDI), 2,4′-diphenylmethane diisocyanate (2,4′-MDI)), or HDI (hexa Methylene diisocyanate).

  As long as the polyol compound is a compound having two or more hydroxyl (OH) groups, its molecular weight and skeleton are not particularly limited. Examples thereof include low-molecular polyhydric alcohols, polycarbonate polyols, polyether polyols, polyester polyols, other polyols, and mixed polyols thereof. In this invention, the various polyol compounds illustrated below may be used individually by 1 type, and may use 2 or more types together.

  Examples of the low molecular weight polyhydric alcohols include ethylene glycol (EG), diethylene glycol, propylene glycol (PG), dipropylene glycol, (1,3- or 1,4-) butanediol, pentanediol, 3-methyl- Low molecular polyols such as 1,5-pentanediol, neopentyl glycol, hexanediol, cyclohexanedimethanol, glycerin, 1,1,1-trimethylolpropane (TMP), 1,2,5-hexanetriol, pentaerythritol; Saccharides such as sorbitol;

  Examples of the polycarbonate polyol include those obtained by a transesterification reaction between a polyol compound and a dialkyl carbonate. Preferred examples of the polyol compound include 1,6-hexanediol, 1,4-butanediol, 1,5-pentanediol and the like among the above-described low molecular weight polyhydric alcohols. As a dialkyl carbonate here, dimethyl carbonate, diethyl carbonate, etc. can be mentioned preferably, for example.

  As the polyether polyol, for example, at least one selected from the compounds exemplified as the above-described low-molecular polyhydric alcohols and the above-described aromatic diols, ethylene oxide, propylene oxide, butylene oxide (tetramethylene oxide), etc. The polyol etc. which are obtained by adding at least 1 sort (s) chosen from alkylene oxide, a styrene oxide, etc. can be mentioned. Specific examples include polyethylene glycol, polypropylene glycol (PPG), polypropylene triol, ethylene oxide / propylene oxide copolymer, polytetramethylene ether glycol (PTMEG), and sorbitol-based polyol. Further, it may be a polyether polyol having a bisphenol skeleton, for example, a polyether polyol obtained by adding ethylene oxide and / or propylene oxide to bisphenol A (4,4′-dihydroxyphenylpropane). Can do.

  Examples of the polyester polyol include condensates (condensed polyester polyols) of the above-described low-molecular polyhydric alcohols and / or aromatic diols and polybasic carboxylic acids; lactone polyols; . Examples of the polybasic carboxylic acid forming the condensed polyester polyol include glutaric acid, adipic acid, azelaic acid, pimelic acid, suberic acid, sebacic acid, terephthalic acid, isophthalic acid, dimer acid, and other low molecular carboxylic acids. , Oligomeric acid, castor oil, hydroxycarboxylic acid such as a reaction product of castor oil and ethylene glycol, and the like. Examples of the lactone-based polyol include ring-opening polymers such as propionlactone and valerolactone. Further, it may be a polyester polyol having a bisphenol skeleton, and a condensed polyester polyol obtained by using a diol having a bisphenol skeleton instead of the low molecular polyhydric alcohols described above or together with the low molecular polyhydric alcohols. Can be mentioned.

  Examples of other polyols include acrylic polyols; polybutadiene polyols; polymer polyols having a carbon-carbon bond in the main chain skeleton such as hydrogenated polybutadiene polyols.

Examples of the foaming agent include CFC-based foaming agents, chlorine-based foaming agents (for example, CH ₂ Cl ₂ ), low-boiling hydrocarbon-based foaming agents (for example, pentane), water, and the like.

  Various methods can be applied to the means for foaming the resin foam-forming material layer 3a to the resin foam 3. For example, a continuous lamination method can be applied.

  The bubbles contained in the resin foam 3 after the foaming treatment have a porosity in the range of 80% to 98%. Such a resin foam 3 can impart heat insulation and moisture permeability to the heat insulating material 10. In addition, it is preferable that the total thickness of the heat insulating material 10 exists in the range of 10 mm or more and 200 mm or less.

[Protective layer]
As shown in FIG. 1, the protective layer 4 is a layer that is arbitrarily provided on the heat insulating material 10, and particularly works to prevent oxidation of the metal layer 2 and maintain heat shielding properties by the metal layer 2. Is. The protective layer 4 is preferably formed of an acrylic urethane-based resin material, and has a moisture permeability resistance of 0.19 m ² · S · Pa / μg so as not to hinder the effect of the heat insulating material 10 according to the present invention. In the following, it is preferable that the waterproofness is provided in a porous manner within a range of 8 kPa or more.

  Since this protective layer 4 is formed of a resin material, it is provided as it is on the metal layer 2 to prevent oxidation of the metal layer 2.

  The thickness of the protective layer 4 is preferably in the range of 0.3 μm or more and 0.7 μm or less. By providing the protective layer 4 within this range, the reflectance of infrared rays having a wavelength of 2 μm or more and 20 μm or less by the metal layer 2 can be made 70% or more.

(Insulation material manufacturing method)
As shown in FIG. 2, the manufacturing method of the heat insulating material has a porous metal layer 2 on one surface of the porous resin layer 1 and the other surface as shown in FIG. A step of preparing a laminate 10a having a resin foam-forming material layer 3a (see FIG. 2C) and a step of foaming the resin foam-forming material layer 3a constituting the laminate 10a (FIG. 2 ( D) see). According to this method, after preparing the laminate 10a, the resin foam-forming material layer 3a is foamed, so that the foaming causes the porous resin foam 3, the porous resin layer 1, and the porosity. It is possible to manufacture the heat insulating material 10 in which the metal layers 2 are arranged in that order.

  As shown in FIGS. 2A, 2B, and 2C, the laminated body 10a includes a step of forming a porous metal layer 2 on one surface of the porous resin layer 1, and a porous resin. And forming the resin foam-forming material layer 3a on the other surface of the layer 1.

  Further, the step of forming the porous metal layer 2 on one surface of the porous resin layer 1 is performed by stretching the previously formed resin layer as shown in FIGS. 2 (A) and 2 (B). And a step of forming a metal layer on the porous resin layer 1 to form a porous metal layer 2.

  As described above, according to the present invention, it is possible to provide the heat insulating material 10 having heat insulating properties, moisture permeability, waterproof properties, and high infrared reflectivity. Moreover, since the heat insulating material 10 is equipped with the resin layer 1 which has waterproofness, it has airtightness as the whole heat insulating material. Moreover, the manufacturing method of the heat insulating material 10 which can be manufactured easily can be provided. For example, the heat insulating material 10 can be suitably used as a heat insulating material for a house, but is not limited thereto. Moreover, when the heat insulating material which concerns on this invention is a sheet form, a several heat insulating material can be laminated | stacked and bonded together and used.

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

[Example 1]
First, the resin layer 1 was prepared. As a constituent material of the resin layer 1, high density polyethylene (manufactured by Nippon Polychem Co., Ltd., trade name: Novatec HD, HJ580, melting point 134 ° C., density 0.960 g / cm ³ ), low density polyethylene (trade name, manufactured by Tosoh Corporation) : Petrocene 208) and calcium carbonate powder having an average particle size of 2 μm. Then, these resin and calcium carbonate were mixed by 1: 1, and the resin layer which is an unstretched sheet was produced with the extruder. Next, this resin layer was stretched 4 times in the longitudinal direction to produce a uniaxially stretched resin layer 1 having a thickness of 85 μm. This resin layer 1 is made porous by stretching treatment.

  A metal layer 2 made of aluminum having a thickness of 40 nm ± 4 nm was formed on one surface of the porous resin layer 1 by EB vapor deposition. The metal layer 2 is formed in a discontinuous form following the uneven shape of the porous surface of the resin layer 1, and the non-continuous portion exhibits porosity. Further, a protective layer made of urethane was printed on the entire surface of the metal layer 2 with a gravure printing machine, and the protective layer was laminated so that the dry thickness was 0.5 μm.

  Next, after the laminated body having the resin layer 1, the metal layer 2, and the protective layer was placed on the resin foam-forming material layer 3a, the resin foam-forming material layer 3a was foamed. The heat insulating material 10 shown in FIG. 1 can be manufactured by foaming at this time. In the manufactured heat insulating material 10, the resin foam 3 and the resin layer 1 are fused by the heat generated during the foaming treatment, and in this state, the heat insulating material 10 extends based on the foaming.

  The heat insulating material 10 is produced by using a continuous laminating apparatus and placing a sheet-like laminate having a porous resin layer 1, a porous metal layer 2 and a porous protective layer on the upper surface side, Kraft paper is arranged on the lower surface side, and they are continuously supplied, and the foam forming material layer obtained by stirring and mixing the liquid A and the liquid B between the two face materials is discharged. The heat insulating material 10 was manufactured by naturally foaming the foam forming material layer 3a between the face materials. In this example, liquid A is 235 parts by mass of crude MDI (trade name: COSMONATE-200, manufactured by Mitsui Chemicals, Inc.) having an NCO content of 31.5% as polyisocyanate. As the polyol, 100 parts by mass of EXCENOL385SO (Asahi Glass Co., Ltd.) was used. Moreover, 1 part by mass of SH-193 (manufactured by Toray Dow Corning Co., Ltd.) is blended as a foam stabilizer, and Kao Riser No. 14 (manufactured by Kao Co., Ltd.) is blended, 15 parts by mass of TCPP (manufactured by Mitsui Chemical Fine Co., Ltd.) is blended as a flame retardant, and 3 parts by mass of water and methylene chloride (as a foaming agent) Asahi Glass Co., Ltd.) was blended in an amount of 5 parts by mass.

In the heat insulating material 10 obtained by the foaming treatment, although the resin layer 1 and the metal layer 2 are somewhat elongated at the time of foaming, since the elongation is about 10%, it is understood that the porosity of the resin layer 1 does not change greatly. ing. As a result, moisture permeability can be ensured, and a metal reflecting surface capable of reflecting infrared rays and near infrared rays is provided. The obtained heat insulating material 10 had a moisture permeability resistance of 0.07 m ² · S · Pa / μg, a waterproof property of 12 kPa, a reflectance of 75%, and an elongation of 140%.

[Example 2]
In Example 1, the heat insulating material 10 was produced in the same manner as in Example 1 except that the thickness of the protective layer was 0.5 μm and the resin layer 1 was 30 μm. The obtained heat insulating material 10 had a moisture permeability resistance of 0.05 m ² · S · Pa / μg, a waterproof property of 10 kPa, a reflectance of 75%, and an elongation of 120%.

[Example 3]
In Example 1, a heat insulating material 10 was produced in the same manner as in Example 1 except that the thickness of the resin layer 1 was 95 μm. The obtained heat insulating material 10 had a moisture permeability resistance of 0.08 m ² · S · Pa / μg, a waterproof property of 12.5 kPa, a reflectance of 75%, and an elongation of 200%.

[Example 4]
In Example 1, the heat insulating material 10 was produced like Example 1 except the thickness of the protective layer 4 being 0.3 micrometer, and the aluminum vapor deposition layer (metal layer 2) being 30 nm. The obtained heat insulating material 10 had a moisture permeability resistance of 0.04 m ² · S · Pa / μg, a waterproof property of 10 kPa, a reflectance of 80%, and an elongation of 150%.

[Example 5]
In Example 1, the heat insulating material 10 was produced like Example 1 except the thickness of the protective layer 4 being 0.7 micrometer, and the aluminum vapor deposition layer (metal layer 2) being 100 nm. The obtained heat insulating material 10 had a moisture permeability resistance of 0.15 m ² · S · Pa / μg, a waterproof property of 16 kPa, a reflectance of 90%, and an elongation of 140%.

[Example 6]
In Example 1, the heat insulating material 10 was produced in the same manner as in Example 1 except that the resin material constituting the resin layer 1 was LDPE. The obtained heat insulating material 10 had a moisture permeability resistance of 0.09 m ² · S · Pa / μg, a waterproof property of 14 kPa, a reflectance of 75%, and an elongation of 250%.

[Measuring method]
The characteristics shown in each of the above examples are the results of measuring the moisture permeability test, waterproof test, infrared reflectance, and tensile strength by the following methods. The moisture permeability test was based on JIS A 6111: 2004 and measured moisture permeability resistance. The waterproof test was based on JIS L 1092 B method, and measured the waterproof property. The infrared reflectance was 2 μm to 20 μm measured with an integrating sphere. The tensile strength was measured according to JIS L 1096.

From the results of each example, in Examples 1 to 4, a moisture permeability resistance of 0.19 m ² · S · Pa / μg or less satisfying JIS A 6111, a waterproof property of 8 kPa or more, and an elongation of 100% or more were confirmed. We were able to.

DESCRIPTION OF SYMBOLS 1 Porous resin layer 2 Porous metal layer 3 Porous resin foam 3a Resin foam 4 Protective layer 10 Heat insulating material 10a Laminate

Claims (7)

  A heat insulating material characterized in that a porous resin foam, a porous resin layer, and a porous metal layer are arranged in that order.   The heat insulating material according to claim 1, wherein a protective layer is provided on the porous metal layer.   The heat insulating material according to claim 1 or 2, wherein the resin foam is used while being disposed inside a wall. A method for producing a heat insulating material in which a porous resin foam, a porous resin layer, and a porous metal layer are arranged in that order,
A step of preparing a laminate having a porous metal layer on one surface of a porous resin layer and a resin foam-forming material layer on the other surface; and the resin foam constituting the laminate And a step of foaming the forming material layer.   The laminate includes a step of forming a porous metal layer on one surface of the porous resin layer, and a step of forming a resin foam-forming material layer on the other surface of the porous resin layer. The manufacturing method of the heat insulating material of Claim 4 formed by these.   The step of forming a porous metal layer on one surface of the porous resin layer includes a step of stretching a previously formed resin layer to form a porous resin layer, and a step of forming a porous resin layer on the porous resin layer. The manufacturing method of the heat insulating material of Claim 4 or 5 which has a process of forming a metal layer into a porous metal layer. The manufacturing method of the heat insulating material of any one of Claims 4-6 which has the process of providing a protective layer on the said metal layer.

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