JP6767610B2 - Insulation and its manufacturing method - Google Patents

Insulation and its manufacturing method Download PDF

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JP6767610B2
JP6767610B2 JP2016024274A JP2016024274A JP6767610B2 JP 6767610 B2 JP6767610 B2 JP 6767610B2 JP 2016024274 A JP2016024274 A JP 2016024274A JP 2016024274 A JP2016024274 A JP 2016024274A JP 6767610 B2 JP6767610 B2 JP 6767610B2
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heat insulating
fiber
radiation prevention
thermoplastic resin
radiation
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JP2017141913A (en
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亨 岡崎
亨 岡崎
崇 鶴田
崇 鶴田
茂昭 酒谷
茂昭 酒谷
享 和田
享 和田
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Panasonic Intellectual Property Management Co Ltd
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Description

本発明は、断熱体とその製造方法に関する。特に、高温環境にて使用する断熱体とその製造方法に関するものである。 The present invention relates to a heat insulating body and a method for producing the same. In particular, it relates to a heat insulating body used in a high temperature environment and a method for manufacturing the same.

従来の断熱体として、例えば、シリカエアロゲルを不織布へ含有させた断熱体がある。この断熱体は、シリカ粒子間のナノオーダーの細孔により、空気の流れを阻害するので、断熱性能が高い。 As a conventional heat insulating body, for example, there is a heat insulating body in which silica airgel is contained in a non-woven fabric. This heat insulating body has high heat insulating performance because it obstructs the flow of air due to nano-order pores between silica particles.

しかしながら、１００℃を越えるような高温環境では、この断熱材は、輻射率が高いシリカ粒子の表面（輻射率０．９５）で輻射熱が発生しやすくなる。結果、シリカ粒子の持つ細孔によって得られた断熱性に対して、輻射伝熱の影響が大きくなり、断熱性を失う（断熱材の見かけの熱伝導率が大きくなる）傾向にある。 However, in a high temperature environment exceeding 100 ° C., this heat insulating material tends to generate radiant heat on the surface of silica particles having a high emissivity (radiance rate 0.95). As a result, the influence of radiant heat transfer on the heat insulating property obtained by the pores of the silica particles becomes large, and the heat insulating property tends to be lost (the apparent thermal conductivity of the heat insulating material becomes large).

これに対する従来の技術として、特許文献１がある。特許文献１を図１１の断面図で説明する。ここでは、断熱体１は、断熱層２１の上に、アルミニウム箔等の輻射防止用フィルムとして輻射反射層２３を配置し、輻射反射層２３の位置を固定するために樹脂等で構成された被覆用シート２２でパウチ状に包含させている。これにより、上部に熱源がある場合の輻射伝熱成分を輻射反射層２３により抑制するというものである。 Patent Document 1 is a conventional technique for this. Patent Document 1 will be described with reference to the cross-sectional view of FIG. Here, in the heat insulating body 1, the radiation reflecting layer 23 is arranged on the heat insulating layer 21 as a radiation prevention film such as an aluminum foil, and a coating made of resin or the like is used to fix the position of the radiation reflecting layer 23. The sheet 22 is included in a pouch shape. As a result, the radiant heat transfer component when there is a heat source in the upper part is suppressed by the radiant reflection layer 23.

また、特許文献２に記載されているのは、エアロゲル含有断熱体の内部に粒状の輻射散乱材を含有させ、輻射伝熱成分を抑制させている。 Further, what is described in Patent Document 2 is that a granular radiant scattering material is contained inside the airgel-containing heat insulating body to suppress the radiant heat transfer component.

特開２００９−２９９８９３号公報JP-A-2009-299893 特許第５４６５１９２号公報Japanese Patent No. 5465192

しかしながら、図１１に示される特許文献１では、熱源が紙面上部にある場合、熱伝導率が大きい被覆用シート２２により、熱源からの熱が回り込み、Ｂの経路を辿って対面への熱パスが形成されるため、断熱性を大きく低下させる可能性がある。 However, in Patent Document 1 shown in FIG. 11, when the heat source is on the upper part of the paper surface, the heat from the heat source wraps around due to the coating sheet 22 having a large thermal conductivity, and the heat path to the facing surface follows the path B. Since it is formed, it may significantly reduce the heat insulating property.

また、特許文献２に示される構造では、振動等の外力が作用する場合、輻射散乱材が断熱材内部から脱落し、断熱性の低下、あるいは、場所による断熱性の粗密が生じる可能性がある。 Further, in the structure shown in Patent Document 2, when an external force such as vibration acts, the radiation scattering material may fall off from the inside of the heat insulating material, resulting in a decrease in heat insulating property or coarse or dense heat insulating property depending on the location. ..

そこで、本発明は、断熱性の低下や部材の脱落を起こさずに、輻射を防止した断熱体とその製造方法を提供することを目的とする。 Therefore, an object of the present invention is to provide a heat insulating body in which radiation is prevented and a method for manufacturing the same, without causing deterioration of heat insulating property or dropping of members.

上記目的を達成するために、断熱体と、上記断熱体の表面に、金属を蒸着した第１繊維と熱可塑性樹脂の第２繊維とを含む樹脂層と、を有する断熱材を用いる。 In order to achieve the above object, a heat insulating material having a heat insulating body and a resin layer containing a first fiber vapor-deposited with a metal and a second fiber of a thermoplastic resin on the surface of the heat insulating body is used.

また、金属を蒸着した第１繊維と熱可塑性樹脂からなる第２繊維とを編み輻射防止部を作製する第１工程と、上記第１工程でできた上記輻射防止部を断熱部の表面に配置し、熱処理をし、上記熱可塑性樹脂を溶かし、上記輻射防止部と上記断熱部とを合体させる第２工程と、を含む断熱体の製造方法を用いる。 Further, the first step of knitting the first fiber vapor-deposited with metal and the second fiber made of thermoplastic resin to produce a radiation prevention portion, and the radiation prevention portion formed in the first step are arranged on the surface of the heat insulating portion. A method for producing a heat insulating body is used, which includes a second step of performing heat treatment, melting the thermoplastic resin, and combining the radiation prevention portion and the heat insulating portion.

本発明によれば、断熱性の低下や部材の脱落を起こさずに、輻射防止機能を持たせることができる。 According to the present invention, it is possible to provide a radiation prevention function without lowering the heat insulating property or causing the member to fall off.

実施の形態１の輻射防止機能を持つ断熱材の斜視図Perspective view of the heat insulating material having the radiation prevention function of the first embodiment 実施の形態１の輻射防止機能を持つ断熱材の断面構造図Cross-sectional structural view of the heat insulating material having the radiation prevention function of the first embodiment （ａ）実施の形態１のエアロゲル断熱部の模式図、（ｂ）実施の形態１の断熱ビーズの模式図、（ｃ）実施の形態１の断熱ビーズの二次粒子の模式図(A) Schematic diagram of the airgel heat insulating portion of the first embodiment, (b) Schematic diagram of the heat insulating beads of the first embodiment, (c) Schematic diagram of the secondary particles of the heat insulating beads of the first embodiment. 実施の形態１の輻射防止機能を持つ断熱材の輻射防止部（溶融前）の構造模式図Schematic diagram of the structure of the radiation prevention part (before melting) of the heat insulating material having the radiation prevention function of the first embodiment. 実施の形態１の輻射防止部の経糸を構成するアルミ蒸着樹脂繊維の断面模式図Schematic cross-sectional view of aluminum-deposited resin fibers constituting the warp of the radiation prevention portion of the first embodiment 実施の形態１の輻射防止機能を持つ断熱材の輻射防止部（溶融硬化後）の構造模式図Schematic diagram of the structure of the radiation prevention part (after melt curing) of the heat insulating material having the radiation prevention function of the first embodiment. 実施の形態１の輻射防止機能を持つ断熱材の構成図Configuration diagram of the heat insulating material having the radiation prevention function of the first embodiment （ａ）〜（ｄ）実施の形態１の輻射防止効果を示すグラフと各地点での状態を示す図(A) to (d) A graph showing the radiation prevention effect of the first embodiment and a diagram showing the state at each point. 実施の形態２の輻射防止機能を持つ断熱材の輻射防止部（溶融前）の構造模式図Schematic diagram of the structure of the radiation prevention part (before melting) of the heat insulating material having the radiation prevention function of the second embodiment. 実施の形態３の輻射防止機能を持つ断熱材の輻射防止部（溶融前）の構造模式図Schematic diagram of the structure of the radiation prevention part (before melting) of the heat insulating material having the radiation prevention function of the third embodiment. 特許文献１の輻射防止機能を持つ断熱材の断面構造図Cross-sectional structure of a heat insulating material having a radiation prevention function of Patent Document

以下、実施の形態について、図面を参照しながら説明する。 Hereinafter, embodiments will be described with reference to the drawings.

＜断熱体１の構成＞
図１は、実施の形態１における輻射防止機能を持つ断熱体１の斜視図である。断熱体１は、エアロゲル断熱部２と輻射防止部３から構成されている。図２は、図１におけるＡ−Ａ´−Ｂ´−Ｂ面の断面構造図である。輻射防止部３は、エアロゲル断熱部２の上部に配置され、経糸であるアルミ蒸着樹脂繊維４と、熱可塑性樹脂５とである。なお、図１と図２に示すのは、熱可塑性樹脂繊維が、溶融し冷却して硬化した熱可塑性樹脂５である。 <Structure of heat insulating body 1>
FIG. 1 is a perspective view of the heat insulating body 1 having a radiation prevention function according to the first embodiment. The heat insulating body 1 is composed of an airgel heat insulating portion 2 and a radiation preventing portion 3. FIG. 2 is a cross-sectional structural view of the AA'-B'-B plane in FIG. The radiation prevention unit 3 is arranged above the airgel heat insulating unit 2, and is an aluminum-deposited resin fiber 4 which is a warp and a thermoplastic resin 5. It should be noted that FIG. 1 and FIG. 2 show the thermoplastic resin 5 in which the thermoplastic resin fibers are melted, cooled, and cured.

＜エアロゲル断熱部２の構成＞
図３（ａ）は、実施の形態１におけるエアロゲル断熱部２の模式図である。エアロゲル断熱部２は、エアロゲル等からなる断熱ビーズ１２と、ＰＥＴ（ポリエチレンテレフタレート）繊維（第２繊維）、グラスウール等の繊維構造物１１とを、複合化したものである。 <Structure of airgel heat insulating part 2>
FIG. 3A is a schematic view of the airgel heat insulating portion 2 according to the first embodiment. The airgel heat insulating portion 2 is a composite of heat insulating beads 12 made of airgel or the like and a fiber structure 11 such as PET (polyethylene terephthalate) fiber (second fiber) or glass wool.

図３（ｂ）は、実施の形態１における断熱ビーズ１２の模式図であり、二次粒子１３が三次元ネットワークを形成した状態である。
図３（ｃ）は、実施の形態１における断熱ビーズ１２の二次粒子１３の模式図であり、さらに細かい一次粒子１４の集合体である。 FIG. 3B is a schematic view of the heat insulating beads 12 in the first embodiment, in which the secondary particles 13 form a three-dimensional network.
FIG. 3C is a schematic view of the secondary particles 13 of the heat insulating beads 12 in the first embodiment, and is an aggregate of finer primary particles 14.

図３（ａ）〜図３（ｃ）において、微小な一次粒子１４の集合体として成る二次粒子１３が、三次元ネットワーク骨格を形成し、断熱ビーズ１２と成る。この断熱ビーズ１２を繊維構造物１１と複合化することによりエアロゲル断熱部２を得る。断熱ビーズ１２の体積の９０％以上は、細孔である。一次粒子１４の粒子径は、１ｎｍ前後であり、二次粒子１３の粒子径は、１０ｎｍ前後であり、断熱ビーズ１２の粒子径は、２０〜２００μｍである。 In FIGS. 3 (a) to 3 (c), the secondary particles 13 formed as an aggregate of the fine primary particles 14 form a three-dimensional network skeleton to form the heat insulating beads 12. The airgel heat insulating portion 2 is obtained by combining the heat insulating beads 12 with the fiber structure 11. More than 90% of the volume of the heat insulating beads 12 are pores. The particle size of the primary particles 14 is about 1 nm, the particle size of the secondary particles 13 is about 10 nm, and the particle size of the heat insulating beads 12 is about 20 to 200 μm.

断熱ビーズ１２の材質としては、断熱性能に優れることから二酸化ケイ素からなるシリカ粒子が望ましい。ここで、断熱ビーズ１２の細孔のサイズＤ（図３（ｂ））は、６８ｎｍ以下であることが望ましい。６８ｎｍは、空気の平均自由工程である。細孔が６８ｎｍ以下であると、空気が移動できず、断熱性が高くなる。 As the material of the heat insulating beads 12, silica particles made of silicon dioxide are desirable because they are excellent in heat insulating performance. Here, it is desirable that the size D (FIG. 3 (b)) of the pores of the heat insulating beads 12 is 68 nm or less. 68 nm is the mean free path of air. When the pores are 68 nm or less, air cannot move and the heat insulating property becomes high.

＜輻射防止部３の構成＞
図４は、実施の形態１における輻射防止部３の原料３０を上部から見た構造模式図である。輻射防止部３の原料３０は、経糸をアルミ蒸着樹脂繊維４、緯糸を熱可塑性樹脂繊維５１で構成されており、経糸、緯糸は平織構造により織られている。 <Structure of radiation prevention unit 3>
FIG. 4 is a schematic structural diagram of the raw material 30 of the radiation prevention unit 3 according to the first embodiment as viewed from above. The raw material 30 of the radiation prevention unit 3 is composed of an aluminum-deposited resin fiber 4 for the warp and a thermoplastic resin fiber 51 for the weft, and the warp and the weft are woven by a plain weave structure.

図５にアルミ蒸着樹脂繊維４の断面構造図を示す。アルミ蒸着樹脂繊維４は、ＰＥＴ（ポリエチレンテレフタレート）フィルム、ナイロンフィルムなどの合成樹脂フィルム８に、アルミ蒸着膜７を蒸着させ、その上に腐食防止塗膜層６をコーティングしたものである。この構造は、いわゆる、金銀糸の構造である。 FIG. 5 shows a cross-sectional structure of the aluminum-deposited resin fiber 4. The aluminum-deposited resin fiber 4 is obtained by depositing an aluminum-deposited film 7 on a synthetic resin film 8 such as a PET (polyethylene terephthalate) film or a nylon film, and coating the corrosion-preventing coating layer 6 on the film. This structure is a so-called gold-silver thread structure.

＜エアロゲル断熱部２の製造方法＞
エアロゲル断熱部２の製造方法としては、図３（ａ）に示すように、断熱ビーズ１２をエアロゲルとする場合、高モル珪酸ソーダなどの、エアロゲルの出発原料である液体を、ＰＥＴ繊維、グラスウールなどで構成される不織布など（繊維構造物１１）に含浸させ、ゲル化工程、養生（熟成）工程、疎水化工程、乾燥工程を経て、繊維構造物１１と断熱ビーズ１２を複合して形成することが望ましい。 <Manufacturing method of airgel heat insulating part 2>
As a method for producing the airgel heat insulating portion 2, as shown in FIG. 3A, when the heat insulating beads 12 are used as an airgel, a liquid which is a starting material of the airgel such as high molar sodium silicate is used as a PET fiber, glass wool or the like. By impregnating a non-woven fabric or the like (fiber structure 11) composed of the above, the fiber structure 11 and the heat insulating beads 12 are combined and formed through a gelling step, a curing (aging) step, a hydrophobicization step, and a drying step. Is desirable.

＜輻射防止部３の製造方法＞
輻射防止部３の製造方法としては、図４に示すように、経糸をアルミ蒸着樹脂繊維４、緯糸を熱可塑性樹脂繊維５１として、平織を行い輻射防止部３の原料３０とする。なお、アルミ蒸着樹脂繊維４のベース樹脂フィルム（合成樹脂フィルム８）の材料としては、断熱体１の使用温度域よりも融点が十分高いもの（例えば、ＰＥＴ樹脂＝融点２６０℃）が望ましい。また、熱可塑性樹脂繊維５１の材料としては、断熱体１の使用温度域よりも融点が十分に高く、合成樹脂フィルム８の融点より低いもの（例えば、ＰＬＡ樹脂＝融点１９０℃）が望ましい。 <Manufacturing method of radiation prevention unit 3>
As a method of manufacturing the radiation prevention unit 3, as shown in FIG. 4, the warp yarn is an aluminum-deposited resin fiber 4 and the weft yarn is a thermoplastic resin fiber 51, and plain weave is performed to use the raw material 30 of the radiation prevention unit 3. The material of the base resin film (synthetic resin film 8) of the aluminum-deposited resin fiber 4 is preferably one having a melting point sufficiently higher than the operating temperature range of the heat insulating body 1 (for example, PET resin = melting point 260 ° C.). Further, as the material of the thermoplastic resin fiber 51, a material having a melting point sufficiently higher than the operating temperature range of the heat insulating body 1 and lower than the melting point of the synthetic resin film 8 (for example, PLA resin = melting point 190 ° C.) is desirable.

＜エアロゲル断熱部２と輻射防止部３の原料３０との接着方法＞
エアロゲル断熱部２と輻射防止部３の原料３０との接着方法としては、熱接着を行う。まずは、図７に示すように、エアロゲル断熱部２の上に輻射防止部３の原料３０を配置する。次に、熱可塑性樹脂繊維５１の融点より高く、合成樹脂フィルム８の融点より低い温度帯の炉の中で、熱可塑性樹脂繊維５１が溶融するまで加熱する。 <Adhesion method between the airgel heat insulating part 2 and the raw material 30 of the radiation prevention part 3>
As a method of adhering the airgel heat insulating portion 2 and the raw material 30 of the radiation preventing portion 3, thermal adhesion is performed. First, as shown in FIG. 7, the raw material 30 of the radiation prevention unit 3 is arranged on the airgel heat insulating unit 2. Next, the thermoplastic resin fiber 51 is heated in a furnace in a temperature range higher than the melting point of the thermoplastic resin fiber 51 and lower than the melting point of the synthetic resin film 8 until the thermoplastic resin fiber 51 is melted.

例えば、合成樹脂フィルム８をＰＥＴ樹脂、熱可塑性樹脂繊維５１をＰＬＡ樹脂とする場合、２００℃〜２６０℃の間の温度帯を使用する。 For example, when the synthetic resin film 8 is a PET resin and the thermoplastic resin fiber 51 is a PLA resin, a temperature range between 200 ° C. and 260 ° C. is used.

加熱により、図４に示すような構造をしていた輻射防止部３の原料３０が、図６に示すように、熱可塑性樹脂繊維５１のみ溶融する。次に、炉から出し、冷却を行うことで、溶融した熱可塑性樹脂繊維５１がエアロゲル断熱部２の繊維構造物１１と絡まり、アンカー効果によって強固に接着する。結果、図２に示したように、エアロゲル断熱部２と熱可塑性樹脂５とが接着した状態となる。 By heating, the raw material 30 of the radiation prevention unit 3 having the structure as shown in FIG. 4 is melted only by the thermoplastic resin fiber 51 as shown in FIG. Next, by taking it out of the furnace and cooling it, the molten thermoplastic resin fiber 51 is entangled with the fiber structure 11 of the airgel heat insulating portion 2 and firmly adhered by the anchor effect. As a result, as shown in FIG. 2, the airgel heat insulating portion 2 and the thermoplastic resin 5 are adhered to each other.

＜輻射防止機能を持つ断熱体１の効果＞
断熱体１を表面から裏面に通過する熱流量は、式１となる。 <Effect of heat insulating body 1 with radiation prevention function>
The heat flow rate passing through the heat insulating body 1 from the front surface to the back surface is given by Equation 1.

Ｗ＝Ｃ×ΔＴ・・・（式１）
ここで、断熱材全体を通過する熱流量の合計値Ｗ、熱コンダクタンスＣ、表裏面間の温度差ΔＴである。 W = C × ΔT ... (Equation 1)
Here, the total value W of the heat flow rate passing through the entire heat insulating material, the thermal conductance C, and the temperature difference ΔT between the front and back surfaces.

熱コンダクタンスＣは、熱伝導成分Ｃｃと輻射成分Ｃｒにより構成され、式２である。 The thermal conductance C is composed of the thermal conductive component Cc and the radiation component Cr, and is of the formula 2.

Ｃ＝Ｃｃ＋Ｃｒ・・・（式２）
ここで、熱伝導成分Ｃｃは、エアロゲル断熱部２が持つ熱伝導率λｂ、熱が通過する方向に対する断面積Ａ、断熱材の厚さＬから、式３である。 C = Cc + Cr ... (Equation 2)
Here, the heat conductive component Cc is of the formula 3 from the thermal conductivity λb of the airgel heat insulating portion 2, the cross-sectional area A with respect to the direction in which heat passes, and the thickness L of the heat insulating material.

Ｃｃ＝（Ａ×λ）／Ｌ・・・（式３）
また、輻射成分Ｃｒは、輻射防止部３の面積Ｓ（アルミ蒸着樹脂繊維４の表面の面積）、輻射熱伝達率ｈｒから、式４である。 Cc = (A × λ) / L ... (Equation 3)
Further, the radiant component Cr is of the formula 4 from the area S of the radiant prevention portion 3 (the area of the surface of the aluminum-deposited resin fiber 4) and the radiant heat transfer coefficient hr.

Ｃｒ＝Ｓ×ｈｒ・・・（式４）
放射熱伝達率ｈｒは、輻射防止膜（アルミ）の輻射率ε、固体表面の絶対温度Ｔａおよび周囲環境の絶対温度Ｔ∞から、式５となる。 Cr = S × hr ... (Equation 4)
The radiant heat transfer coefficient hr is given by Equation 5 from the emissivity ε of the radiation prevention film (aluminum), the absolute temperature Ta of the solid surface, and the absolute temperature T∞ of the ambient environment.

ｈｒ＝５．６７×１０−８×ε×（Ｔａ２＋Ｔ∞２）×（Ｔａ＋Ｔ∞）（式５）
輻射成分Ｃｒが大きくなると式４の熱コンダクタンスの輻射成分Ｃｒが大きな値をとり、式１に示す熱コンダクタンスＣの値が大きくなる。このため、式１に示す断熱体１を通過する熱流量が増え、断熱効果が小さくなってしまう。つまり、見かけの熱伝導率が大きくなる。 hr = 5.67 × 10-8 × ε × (Ta 2 + T∞ 2 ) × (Ta + T∞) (Equation 5)
When the radiation component Cr becomes large, the radiation component Cr of the thermal conductance of the formula 4 takes a large value, and the value of the thermal conductance C shown in the formula 1 becomes large. Therefore, the heat flow rate passing through the heat insulating body 1 represented by the formula 1 increases, and the heat insulating effect becomes small. That is, the apparent thermal conductivity increases.

断熱体１の見かけの熱伝導率λｃは、式１の熱流量を用いて、式６となる。 The apparent thermal conductivity λc of the heat insulating body 1 is given by the formula 6 using the heat flow rate of the formula 1.

λｃ＝（Ｗ・Ｌ）／（Ａ・ΔＴ）・・・（式６）
断熱体１の熱伝導率の測定規格である熱流計法（ＪＩＳ Ａ１４１２−２）では、式６にしたがい、断熱体１の表裏間を通過する熱流量Ｗ、断熱材の厚みＬ、断面積Ａと表裏面の温度差ΔＴから、熱伝導率（伝導、輻射成分を含む見かけの熱伝導率）を求める。 λc = (W ・ L) / (A ・ ΔT) ・ ・ ・ (Equation 6)
In the thermal flow metering method (JIS A1412-2), which is a standard for measuring the thermal conductivity of the heat insulating body 1, the heat flow rate W passing between the front and back surfaces of the heat insulating body 1, the thickness L of the heat insulating material, and the cross-sectional area A are according to Equation 6. The thermal conductivity (apparent thermal conductivity including conduction and radiation components) is obtained from the temperature difference ΔT between the front and back surfaces.

図８（ａ）に、アルミ蒸着樹脂繊維４の密度を変更して作製した断熱体１に対して、熱流計法による熱伝導率の測定結果を示す。 FIG. 8A shows the measurement results of the thermal conductivity of the heat insulating body 1 produced by changing the density of the aluminum-deposited resin fibers 4 by the heat flow metering method.

ここでは、輻射防止部３は、経糸のアルミ蒸着樹脂繊維４であるクラウン工業株式会社製金銀糸ＢＲＩＧＨＴＥＸ ＬＡＭＥ’平糸Ｍ１２メタリックと、緯糸の熱可塑性樹脂繊維５１であるＷＩＮＢＯ製フィラメントマテリアルＰＬＡ樹脂Ｍａｒｂｏｔとを、平織りにて作製した原料３０を溶かして製造した。 Here, the radiation prevention unit 3 includes a gold-silver thread BRIGHTEX LAME'flat thread M12 metallic manufactured by Crown Industry Co., Ltd., which is an aluminum-deposited resin fiber 4 of the warp, and a filament material PLA resin Marbot made by WINBO, which is a thermoplastic resin fiber 51 of the weft. Was produced by melting the raw material 30 produced by plain weaving.

熱伝導率の測定には、ネッチ・ジャパン株式会社製熱流計法熱伝導率測定装置ＨＦＭ−４３６を使用し、サンプル温度（エアロゲル断熱部２の中心温度）９０℃の環境にて測定した。 For the measurement of the thermal conductivity, a thermal conductivity measuring device HFM-436 manufactured by Netch Japan Co., Ltd. was used, and the measurement was performed in an environment of a sample temperature (center temperature of the airgel heat insulating portion 2) of 90 ° C.

用いたいくつかの輻射防止部３の原料３０の斜視図を図８（ｂ）〜図８（ｄ）に示す。アルミ蒸着樹脂繊維４の密度の変更は、図８（ｂ）〜図８（ｄ）に示すように、輻射防止部３の原料３０を構成するアルミ蒸着樹脂繊維４の経糸を配置する間隔を調整することにより行った。アルミ蒸着樹脂繊維４を配置しない経糸には熱可塑性樹脂繊維５１を配置した。 The perspective views of the raw material 30 of some of the radiation prevention units 3 used are shown in FIGS. 8 (b) to 8 (d). To change the density of the aluminum-deposited resin fiber 4, as shown in FIGS. 8 (b) to 8 (d), the interval at which the warp threads of the aluminum-deposited resin fiber 4 constituting the raw material 30 of the radiation prevention unit 3 are arranged is adjusted. I went by doing. The thermoplastic resin fiber 51 was arranged in the warp yarn in which the aluminum-deposited resin fiber 4 was not arranged.

図８（ｄ）より、輻射防止機能を持つアルミ蒸着樹脂繊維４が無いもの（図８の左側０：１００の構造）では、見かけの熱伝導率（伝導、輻射成分を含む熱伝導率）が約０．０２４Ｗ／（ｍ・Ｋ）と高いが、アルミ蒸着樹脂繊維４の割合を増やすごとに（図８の真ん中５０：５０の構造、図８の右側１００：０の構造へと移るごとに）、見かけの熱伝導率の値が小さくなっていることがわかる。すなわち、アルミ蒸着樹脂繊維４を備えた構造により、伝熱における輻射成分が抑えられていることがわかる。 From FIG. 8D, the apparent thermal conductivity (conductivity, thermal conductivity including radiation components) is higher in the case without the aluminum vapor-deposited resin fiber 4 having a radiation prevention function (structure at 0: 100 on the left side of FIG. 8). It is as high as about 0.024 W / (m · K), but each time the ratio of the aluminum vapor-deposited resin fiber 4 is increased (the structure is 50:50 in the middle of FIG. 8 and the structure is 100: 0 on the right side of FIG. 8). ), It can be seen that the apparent thermal conductivity value is small. That is, it can be seen that the structure provided with the aluminum-deposited resin fiber 4 suppresses the radiant component in heat transfer.

図９は、実施の形態１における輻射防止機能を持つ断熱体１の輻射防止部３の原料３０の構造を上部から見た図である。熱可塑性樹脂繊維５１による輻射防止部３とエアロゲル断熱部２との接着力が十分に確保される場合、図９に示すように、輻射防止部３の原料３０の織構造を、アルミ蒸着樹脂繊維４が表面に多く出る綾織にし、輻射防止効果を高めることも可能である。 FIG. 9 is a view of the structure of the raw material 30 of the radiation prevention unit 3 of the heat insulating body 1 having the radiation prevention function according to the first embodiment as viewed from above. When sufficient adhesive force between the radiation prevention portion 3 and the airgel heat insulation portion 2 by the thermoplastic resin fiber 51 is secured, as shown in FIG. 9, the woven structure of the raw material 30 of the radiation prevention portion 3 is made of aluminum-deposited resin fiber. It is also possible to enhance the radiation prevention effect by forming a twill weave in which a large amount of 4 appears on the surface.

図１０は、実施の形態１における輻射防止機能を持つ断熱体１の輻射防止部３の原料３０の構造を上部から見た図である。熱可塑性樹脂繊維５１による輻射防止部３とエアロゲル断熱部２との接着力が十分に確保できる場合、図９に示すように、輻射防止部３の原料３０の織構造を、アルミ蒸着樹脂繊維４が表面に多く出る朱子織にし、輻射防止効果を高めることも可能である。 FIG. 10 is a view of the structure of the raw material 30 of the radiation prevention unit 3 of the heat insulating body 1 having the radiation prevention function according to the first embodiment as viewed from above. When the adhesive force between the radiation prevention portion 3 and the airgel heat insulating portion 2 by the thermoplastic resin fiber 51 can be sufficiently secured, as shown in FIG. 9, the woven structure of the raw material 30 of the radiation prevention portion 3 is made of the aluminum-deposited resin fiber 4. It is also possible to enhance the radiation prevention effect by using an airgel weave that produces a large amount of resin on the surface.

実施の形態の断熱材は、従来品よりも、断熱性の確保と輻射防止剤の脱落防止性に優れる。このため、特に１００℃あるいはそれ以上の、輻射伝熱が支配的である温度域での断熱効果が期待でき、省エネルギーに貢献できるあらゆる機器の断熱用途に適用できる。
（なお書き）
輻射防止部３は、エアロゲル断熱部２の上面全体にある必要はない。大部分を覆えばよい。輻射防止部３の原料３０は、平織、朱子織、綾織に限られない。規則正しく２つの繊維が織られているのが、物理的に、好ましい。不織布的な状態でおられていてもよい。 The heat insulating material of the embodiment is superior to the conventional product in ensuring heat insulating properties and preventing the radiation inhibitor from falling off. Therefore, a heat insulating effect can be expected especially in a temperature range where radiant heat transfer is dominant, such as 100 ° C. or higher, and it can be applied to heat insulating applications of all devices that can contribute to energy saving.
(Note)
The radiation prevention unit 3 does not have to be on the entire upper surface of the airgel heat insulating unit 2. Most of it should be covered. The raw material 30 of the radiation prevention unit 3 is not limited to plain weave, satin weave, and twill weave. It is physically preferable that the two fibers are woven regularly. It may be in a non-woven fabric state.

本発明の断熱材は、断熱材料として広く利用される。特に、１００℃あるいはそれ以上の、輻射伝熱が支配的である温度域で利用される。あらゆる機器の断熱用途に利用される。 The heat insulating material of the present invention is widely used as a heat insulating material. In particular, it is used in a temperature range of 100 ° C. or higher, where radiant heat transfer is dominant. It is used for heat insulation of all kinds of equipment.

１ 断熱体
２ エアロゲル断熱部
３ 輻射防止部
４ アルミ蒸着樹脂繊維
５ 熱可塑性樹脂
６ 腐食防止塗膜層
７ アルミ蒸着膜
８ 合成樹脂フィルム
１１ 繊維構造物
１２ 断熱ビーズ
１３ 二次粒子
１４ 一次粒子
２１ 断熱層
２２ 被覆用シート
２３ 輻射反射層
３０ 原料
５１ 熱可塑性樹脂繊維
1 Insulation body 2 Aerogel insulation part 3 Radiation prevention part 4 Aluminum vapor deposition resin fiber 5 Thermoplastic resin 6 Corrosion prevention coating layer 7 Aluminum vapor deposition film 8 Synthetic resin film 11 Fiber structure 12 Insulation beads 13 Secondary particles 14 Primary particles 21 Insulation Layer 22 Coating sheet 23 Radiation reflection layer 30 Raw material 51 Thermoplastic resin fiber

Claims (7)

断熱部と、
金属を蒸着した第１繊維と熱可塑性樹脂繊維とを含み、前記断熱部の表面に配置される輻射防止部と、を含み、
前記第１繊維は、前記熱可塑性樹脂繊維と編まれて、
前記断熱部は、断熱ビーズとの複合物であり、
前記熱可塑性樹脂繊維のみが溶融され、前記断熱部と前記輻射防止部とが接着された断熱材。 Insulation part and
It contains a first fiber vapor-deposited with metal and a thermoplastic resin fiber, and includes a radiation prevention portion arranged on the surface of the heat insulating portion.
The first fiber is knitted with the thermoplastic resin fiber and
The heat insulating portion is a composite with heat insulating beads.
A heat insulating material in which only the thermoplastic resin fiber is melted and the heat insulating portion and the radiation preventing portion are adhered to each other. 前記第１繊維は、合成樹脂フィルムを前記金属で蒸着されており、前記合成樹脂フィルムは、溶融されていない請求項１記載の断熱材。 The heat insulating material according to claim 1, wherein the first fiber is a synthetic resin film vapor-deposited with the metal, and the synthetic resin film is not melted. 前記第１繊維は、前記熱可塑性繊維と、朱子織で編まれ、前記第１繊維が、前記熱可塑性樹脂繊維より多く表面に出る請求項１または２に記載の断熱材。 The heat insulating material according to claim 1 or 2, wherein the first fiber is knitted with the thermoplastic fiber and a satin weave, and the first fiber is exposed to the surface more than the thermoplastic resin fiber. 前記第１繊維は、前記熱可塑性繊維と、綾織で編まれ、前記第１繊維が、前記熱可塑性樹脂繊維より多く表面に出ている請求項１または２に記載の断熱材。 The heat insulating material according to claim 1 or 2 , wherein the first fiber is knitted with the thermoplastic fiber and a twill weave, and the first fiber is exposed on the surface more than the thermoplastic resin fiber. 前記断熱ビーズは、シリカである請求項１〜４のいずれか１項に記載の断熱体。 The heat insulating body according to any one of claims 1 to 4, wherein the heat insulating beads are silica. 金属を蒸着した第１繊維と、熱可塑性樹脂からなる第２繊維とを含む輻射防止部を作製する第１工程と、
前記第１工程で作製された前記輻射防止部を断熱部の表面に配置し、熱処理をし、前記第２繊維のみを溶かすことで、前記輻射防止部と前記断熱部とを合体させる第２工程と、を含む断熱体の製造方法。 A first step of producing a radiation prevention portion containing a first fiber vapor-deposited with a metal and a second fiber made of a thermoplastic resin.
The second step of arranging the radiation prevention portion produced in the first step on the surface of the heat insulating portion, heat-treating the heat insulating portion, and melting only the second fiber to combine the radiation preventing portion and the heat insulating portion. And, including how to manufacture the insulation. 前記第１工程では、前記第１繊維と前記第２繊維とは織らせている請求項６記載の製造方法。 The production method according to claim 6, wherein in the first step, the first fiber and the second fiber are woven.
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