WO2006100730A1 - Insulator and process for producing the same - Google Patents

Insulator and process for producing the same Download PDF

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Publication number
WO2006100730A1
WO2006100730A1 PCT/JP2005/004990 JP2005004990W WO2006100730A1 WO 2006100730 A1 WO2006100730 A1 WO 2006100730A1 JP 2005004990 W JP2005004990 W JP 2005004990W WO 2006100730 A1 WO2006100730 A1 WO 2006100730A1
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WIPO (PCT)
Prior art keywords
heat insulating
insulating material
calcium silicate
composite material
graphite
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PCT/JP2005/004990
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French (fr)
Japanese (ja)
Inventor
Guomin Mi
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Kyosetu Corporation
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Priority to PCT/JP2005/004990 priority Critical patent/WO2006100730A1/en
Publication of WO2006100730A1 publication Critical patent/WO2006100730A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/06—Arrangements using an air layer or vacuum
    • F16L59/065—Arrangements using an air layer or vacuum using vacuum
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
    • C04B35/22—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in calcium oxide, e.g. wollastonite

Definitions

  • the present invention relates to a heat insulating material used as a general heat insulating material or a core material of a vacuum heat insulating material, and a method for producing the same.
  • Ultra-fine silica powder (SiO 2) or flattened inorganic core material for high-performance vacuum insulation that suppresses heat leakage caused by containers and coatings and does not cause deterioration of insulation performance due to increased internal pressure.
  • the present invention has been invented to solve the above problems, and has as its object to provide a heat insulating material that has excellent heat insulating performance and can be manufactured industrially at low cost, and a method for manufacturing the same.
  • Another object of the present invention is to provide a core material for vacuum heat insulating material that has excellent heat insulating performance and can be manufactured industrially at low cost.
  • the present invention has high strength and generates very little gas from the core material and binder.
  • An object is to provide a core material for realizing a high-performance vacuum heat insulating material that does not cause an increase in internal pressure or a deterioration in heat insulating performance.
  • Patent Document 1 Japanese Patent Publication No. 2002-147686
  • the present invention comprises a heat insulating material made of a composite material obtained by mixing calcium silicate hydrate and finely expanded graphite.
  • the heat insulating material used as the core material filled in the outer packaging material of the vacuum heat insulating material is composed of a composite material mixed with calcium silicate hydrate and finely expanded graphite. Further, the present invention is characterized in that the composite material is in a powder form.
  • the present invention is also characterized in that the composite material is molded.
  • the present invention is characterized in that the composite material is fired. Further, the present invention is characterized in that the calcium silicate hydrate is tobermorite.
  • the present invention is also characterized in that the calcium silicate hydrate is zonotlite.
  • the present invention is a method for producing a heat insulating material used as a core material of a general heat insulating material or a vacuum heat insulating material, and synthesizes silica and slaked lime by mechanochemical treatment to generate a hydrated potassium acid hydrate.
  • the present invention is a method for producing a heat insulating material used as a core material of a general heat insulating material or a vacuum heat insulating material, and synthesizes silica and slaked lime by mechanochemical treatment to generate a hydrated potassium acid hydrate.
  • the present invention is characterized in that the key acid hydrate hydrate in the step of producing the calcium silicate hydrate is tobermorite.
  • the present invention is characterized in that the key acid hydrate hydrate in the step of producing the calcium silicate hydrate is zonotolite.
  • FIG. 1 is an explanatory view showing a method for manufacturing a heat insulating material according to the present invention.
  • FIG. 2 is a cross-sectional view of a vacuum heat insulating material useful for one embodiment of the present invention.
  • FIG. 1 shows a method for manufacturing a heat insulating material according to the present invention.
  • silica SiO 2
  • Ca slaked lime
  • step 1 Put into a planetary mill (grinding reactor) with (Mechanochemical) effect and mix and grind in the planetary mill for 0.5-5 hours to produce tobermorite (step 1).
  • Step 2 Next, the produced acid graphite is washed with water to produce finely expanded graphite (step 3). Next, tobermorite and slightly expanded graphite are mixed with a mixer to produce a composite material in which tobermorite and slightly expanded graphite are mixed (step 4). Next, this composite material is molded with 2-5k gfZcm 2 (step 5). Next, the molded composite material is dried at 125 degrees for 1 to 2 hours (step 6).
  • the composite that has been subjected to the drying treatment is baked at 500 to 1200 ° C. to cure the composite. Finish the insulation manufacturing process (Step 7).
  • the measured thermal conductivity of the heat insulating material manufactured in this way is confirmed to have extremely good heat insulating performance. Further, the heat insulating material has been obtained with high strength through molding, drying, and baking treatment.
  • the above heat insulating material can be used as a general heat insulating material, but is optimal as the core material 2 of the vacuum heat insulating material 1 shown in FIG.
  • the vacuum heat insulating material 1 includes the core material 2 as an outer packaging material such as plastic or metal foil laminate film. In addition to the heat insulation performance of the core material 2, it is structured to be more difficult to transfer heat by enclosing in 3 and making the inside a vacuum state.
  • the measured value of the thermal conductivity of the vacuum heat insulating material 1 configured in this way is 0.0OOlOWZmK, and extremely excellent heat insulating performance has been confirmed.
  • Various devices such as a refrigerator and a refrigerator, a notebook type, etc. It can be incorporated into the computer, jar, pot and other required places and used to improve the thermal insulation and thermal insulation function of these devices.
  • zonotlite may be generated in step 1 above, and a composite material with finely expanded graphite may be generated using the zonotlite.
  • the composite material generated in step 4 shown in FIG. 1 is not molded, and the process proceeds to the drying process in step 6 without performing the process in step 5.
  • the dried powdery composite material may be fired to produce a heat insulating material.
  • the drying and firing processes of the present embodiment are the same processes as in the first embodiment.
  • the tobermorite zonotolite constituting the heat insulating material according to the present invention is calcium silicate, and the raw materials thereof are silica such as key sand and slaked lime, so they are abundant and low in cost.
  • calcium silicates such as tobermorite and zonotolite and graphite have a plate-like porous structure, and graphite has an infrared shielding property and absorptivity.
  • the heat insulating material according to the present invention is lightweight and has excellent heat insulating performance, and can be manufactured at normal temperature and normal pressure by mechanochemical synthesis. It is optimal as a heat insulating material.

Abstract

An insulator is produced by a step of forming a calcium silicate hydrate such as tobermorite or xonotlite by mechanochemical treatment of silica with calcium hydroxide for synthesis, a step of forming graphite oxide by reacting graphite with a mixed acid, a step of forming a slightly expanded graphite by washing the graphite oxide with water, a step of forming a composite material of the calcium silicate hydrate with the slightly expanded graphite by mixing the calcium silicate hydrate with the slightly expanded graphite produced in the above-mentioned steps, a step of drying the composite material as is in powder form or after it is molded, and a step of calcinating the composite material in powder or molded form. The insulator is used as a general insulator or a core material for a vacuum insulator.

Description

断熱材及びその製造方法  Insulating material and manufacturing method thereof
技術分野  Technical field
[0001] 本発明は、一般の断熱材として、あるいは真空断熱材の芯材として使用される断熱 材及びその製造方法に関する。  [0001] The present invention relates to a heat insulating material used as a general heat insulating material or a core material of a vacuum heat insulating material, and a method for producing the same.
背景技術  Background art
[0002] 容器や被覆物によるヒートリークを抑制し、かつ内圧増加による断熱性能の劣化を 招くことがない高性能な真空断熱材の無機芯材として、超微シリカ粉体 (SiO )や平  [0002] Ultra-fine silica powder (SiO 2) or flattened inorganic core material for high-performance vacuum insulation that suppresses heat leakage caused by containers and coatings and does not cause deterioration of insulation performance due to increased internal pressure.
2 均繊維径 2ミクロン以下のグラスウールなどを使用したものが開発されている（例えば 特許文献 1参照)。しかるに、無機芯材として、上記材料を使用した場合、コスト高に なってしまう。また、現存の真空断熱材の有機芯材には榭脂等が使用されており、環 境や人体への影響が懸念されるとともに、ガスが発生するため真空断熱材の断熱性 能が劣化するという問題がある。また、現存の真空断熱材には、芯材のバインダー（ 結合剤）としてフエノール榭脂等の有機バインダーが使用されており、環境や人体へ の影響が懸念されるとともに、種々のガスが発生するため真空断熱材の断熱性能が 劣化するという問題があった。  2. A product using glass wool having an average fiber diameter of 2 microns or less has been developed (see, for example, Patent Document 1). However, when the above material is used as the inorganic core material, the cost becomes high. In addition, the existing organic core material of vacuum insulation material uses rosin, etc., and there is concern about the impact on the environment and the human body, and the generation of gas will deteriorate the insulation performance of the vacuum insulation material. There is a problem of doing. In addition, existing vacuum insulation materials use organic binders such as phenol resin as the core binder (binder), which may cause environmental and human effects and generate various gases. Therefore, there was a problem that the heat insulation performance of the vacuum heat insulating material deteriorated.
[0003] また、従来、一般的な断熱材としては、グラスウールなどの繊維体やウレタンフォー ムなどの発泡体が用いられている。しかし、これらの断熱材の断熱性を向上させるた めには断熱材の厚さを増す必要があり、断熱材を充填できる空間に制限があって、 省スペースや空間の有効利用が必要な場合には適用することができないという問題 がある。 [0003] Conventionally, as a general heat insulating material, a fibrous body such as glass wool or a foamed body such as urethane foam has been used. However, in order to improve the heat insulation of these heat insulating materials, it is necessary to increase the thickness of the heat insulating material, and there is a limit to the space that can be filled with the heat insulating material. Has a problem that it cannot be applied.
本発明は上記問題点を解消するために発明されたものであり、優れた断熱性能を 有し、且つ工業的に低コストで製造できる断熱材及びその製造方法を提供することを 目的とする。  The present invention has been invented to solve the above problems, and has as its object to provide a heat insulating material that has excellent heat insulating performance and can be manufactured industrially at low cost, and a method for manufacturing the same.
[0004] また、本発明は、優れた断熱性能を有し、且つ工業的に低コストで製造できる真空 断熱材用の芯材を提供することを目的とする。  [0004] Another object of the present invention is to provide a core material for vacuum heat insulating material that has excellent heat insulating performance and can be manufactured industrially at low cost.
また、本発明は、高強度かつ芯材及び結合剤から発生するガスがきわめて少なぐ 内圧増加や断熱性能の劣化を招くことのない高性能な真空断熱材を実現するため の芯材を提供することを目的とする。 Further, the present invention has high strength and generates very little gas from the core material and binder. An object is to provide a core material for realizing a high-performance vacuum heat insulating material that does not cause an increase in internal pressure or a deterioration in heat insulating performance.
特許文献 1：日本国特許公開 2002-147686号公報 Patent Document 1: Japanese Patent Publication No. 2002-147686
発明の開示 Disclosure of the invention
上記目的を達成するため、本発明は、断熱材を、ケィ酸カルシウム水化物と微膨張 黒鉛とを混合した複合材カゝら構成したものである。  In order to achieve the above object, the present invention comprises a heat insulating material made of a composite material obtained by mixing calcium silicate hydrate and finely expanded graphite.
また本発明は、真空断熱材の外包材に充填される芯材として使用される断熱材を、 ケィ酸カルシウム水化物と微膨張黒鉛とを混合した複合材カゝら構成したものである。 また本発明は、前記複合材が粉末状であることを特徴とするものである。  In the present invention, the heat insulating material used as the core material filled in the outer packaging material of the vacuum heat insulating material is composed of a composite material mixed with calcium silicate hydrate and finely expanded graphite. Further, the present invention is characterized in that the composite material is in a powder form.
また本発明は、前記複合材が成型されていることを特徴とするものである。  The present invention is also characterized in that the composite material is molded.
また本発明は、前記複合材が焼成されていることを特徴とするものである。 また本 発明は、前記ケィ酸カルシウム水化物がトバモライトであることを特徴とするものであ る。  The present invention is characterized in that the composite material is fired. Further, the present invention is characterized in that the calcium silicate hydrate is tobermorite.
また本発明は、前記ケィ酸カルシウム水化物がゾノトライトであることを特徴とするも のである。  The present invention is also characterized in that the calcium silicate hydrate is zonotlite.
また本発明は、一般断熱材あるいは真空断熱材の芯材として使用される断熱材を 製造する方法であって、シリカと消石灰とをメカノケミカル処理により合成してケィ酸力 ルシゥム水化物を生成するステップと、黒鉛と混合酸とを反応させて酸化黒鉛を生成 するステップと、前記酸ィ匕黒鉛を水洗いし、微膨張黒鉛を生成するステップと、前記 ケィ酸カルシウム水化物と前記微膨張黒鉛とを混合し、前記ケィ酸カルシウム水化物 と前記微膨張黒鉛との複合材を生成するステップと、前記複合材を乾燥するステップ と、前記複合材に焼成処理を行うステップとを備えたことを特徴とするものである。 また本発明は、一般断熱材あるいは真空断熱材の芯材として使用される断熱材を 製造する方法であって、シリカと消石灰とをメカノケミカル処理により合成してケィ酸力 ルシゥム水化物を生成するステップと、黒鉛と混合酸とを反応させて酸化黒鉛を生成 するステップと、前記酸ィ匕黒鉛を水洗いし、微膨張黒鉛を生成するステップと、前記 ケィ酸カルシウム水化物と前記微膨張黒鉛とを混合し、前記ケィ酸カルシウム水化物 と前記微膨張黒鉛との複合材を生成するステップと、前記複合材を成型するステップ と、前記成型した複合材を乾燥するステップと、前記成型した複合材に焼成処理を行 うステップとを備えたことを特徴とするものである。 Further, the present invention is a method for producing a heat insulating material used as a core material of a general heat insulating material or a vacuum heat insulating material, and synthesizes silica and slaked lime by mechanochemical treatment to generate a hydrated potassium acid hydrate. A step of reacting graphite with a mixed acid to produce graphite oxide, a step of washing the acid soot graphite to produce finely expanded graphite, a calcium silicate hydrate and the finely expanded graphite, And a step of producing a composite material of the calcium silicate hydrate and the slightly expanded graphite, a step of drying the composite material, and a step of performing a baking treatment on the composite material. It is what. Further, the present invention is a method for producing a heat insulating material used as a core material of a general heat insulating material or a vacuum heat insulating material, and synthesizes silica and slaked lime by mechanochemical treatment to generate a hydrated potassium acid hydrate. A step of reacting graphite with a mixed acid to produce graphite oxide, a step of washing the acid soot graphite to produce finely expanded graphite, a calcium silicate hydrate and the finely expanded graphite, A step of forming a composite material of the calcium silicate hydrate and the finely expanded graphite, and a step of molding the composite material And a step of drying the molded composite material and a step of firing the molded composite material.
また本発明は、前記ケィ酸カルシウム水化物を生成するステップにおけるケィ酸力 ルシゥム水化物がトバモライトであることを特徴とするものである。  Further, the present invention is characterized in that the key acid hydrate hydrate in the step of producing the calcium silicate hydrate is tobermorite.
また本発明は、前記ケィ酸カルシウム水化物を生成するステップにおけるケィ酸力 ルシゥム水化物がゾノトライトであることを特徴とするものである。  Further, the present invention is characterized in that the key acid hydrate hydrate in the step of producing the calcium silicate hydrate is zonotolite.
図面の簡単な説明  Brief Description of Drawings
[0006] [図 1]本発明にかかる断熱材の製造方法を示す説明図である。  FIG. 1 is an explanatory view showing a method for manufacturing a heat insulating material according to the present invention.
[図 2]本発明の一実施形態に力かる真空断熱材の断面図である。  FIG. 2 is a cross-sectional view of a vacuum heat insulating material useful for one embodiment of the present invention.
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0007] 以下に本発明の実施の形態を添付した図面を参照して詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
図 1は、本発明にかかる断熱材の製造方法を示している。その製造に際し、まず、 シリカ（SiO )と消石灰（Ca (OH) )を SiZCa= l . 1- 1. 3の割合で、メカノケミカル  FIG. 1 shows a method for manufacturing a heat insulating material according to the present invention. First, silica (SiO 2) and slaked lime (Ca (OH)) at a ratio of SiZCa = l.
2 2  twenty two
(Mechanochemical)効果を持つ遊星ミル（粉砕反応機）に入れ、 0. 5— 5時間、遊 星ミル内で混合粉砕し、トバモライト（tobermorite)を生成する（ステップ 1)。  Put into a planetary mill (grinding reactor) with (Mechanochemical) effect and mix and grind in the planetary mill for 0.5-5 hours to produce tobermorite (step 1).
[0008] 一方、 5— 20%の黒鉛 (C)と混合酸 (H SO +H O )を反応させ、酸化黒鉛を生成 [0008] On the other hand, 5-20% graphite (C) reacts with mixed acid (H 2 SO + H 2 O 2) to produce graphite oxide
2 4 2 2  2 4 2 2
する (ステップ 2)。次に、この生成した酸ィ匕黒鉛を水洗いし微膨張黒鉛を生成する（ ステップ 3)。次に、トバモライトと微膨張黒鉛とを混合機により混合し、トバモライトと微 膨張黒鉛とが混合した複合材を生成する (ステップ 4)。つぎに、この複合材を 2— 5k gfZcm2で成型する (ステップ 5)。つぎに、この成型した複合材に対して、 125度じで 、 1時間から 2時間乾燥処理を行う（ステップ 6)。 (Step 2). Next, the produced acid graphite is washed with water to produce finely expanded graphite (step 3). Next, tobermorite and slightly expanded graphite are mixed with a mixer to produce a composite material in which tobermorite and slightly expanded graphite are mixed (step 4). Next, this composite material is molded with 2-5k gfZcm 2 (step 5). Next, the molded composite material is dried at 125 degrees for 1 to 2 hours (step 6).
[0009] 最後に、乾燥処理を行った複合材に対して、 500— 1200度 Cで焼成処理を行い、 該複合材を硬化させ。断熱材の製造工程を終了する (ステップ 7)。このようにして製 造した断熱材の熱伝導率の測定値は、きわめて優れた断熱性能が確認されて ヽる。 また、上記断熱材は、成型、乾燥、焼成処理を経ることにより、高い強度が得られて いる。上記断熱材は、一般的な断熱材として使用することが可能であるが、図 2に示 す、真空断熱材 1の芯材 2として最適である。  [0009] Finally, the composite that has been subjected to the drying treatment is baked at 500 to 1200 ° C. to cure the composite. Finish the insulation manufacturing process (Step 7). The measured thermal conductivity of the heat insulating material manufactured in this way is confirmed to have extremely good heat insulating performance. Further, the heat insulating material has been obtained with high strength through molding, drying, and baking treatment. The above heat insulating material can be used as a general heat insulating material, but is optimal as the core material 2 of the vacuum heat insulating material 1 shown in FIG.
[0010] 真空断熱材 1は、上記芯材 2をプラスチックや金属箔ラミネートフィルムなどの外包材 3に包み込み、内部を真空状態とすることで、芯材 2の断熱性能に加え、より熱を伝え にくい構造となっている。このように構成した真空断熱材 1の熱伝導率の測定値は、 0 . OOlOWZmKであり、きわめて優れた断熱性能が確認されており、各種の機器、例 えば、冷凍冷蔵庫および冷凍機、ノート型コンピュータ、ジャー、ポット等の所要の箇 所に組み込み、これらの機器の保温断熱機能を向上させるために使用することがで きる。 [0010] The vacuum heat insulating material 1 includes the core material 2 as an outer packaging material such as plastic or metal foil laminate film. In addition to the heat insulation performance of the core material 2, it is structured to be more difficult to transfer heat by enclosing in 3 and making the inside a vacuum state. The measured value of the thermal conductivity of the vacuum heat insulating material 1 configured in this way is 0.0OOlOWZmK, and extremely excellent heat insulating performance has been confirmed. Various devices such as a refrigerator and a refrigerator, a notebook type, etc. It can be incorporated into the computer, jar, pot and other required places and used to improve the thermal insulation and thermal insulation function of these devices.
[0011] 尚、上記実施形態では、シリカと消石灰を遊星ミルでメカノケミカル合成してトバモラ イトを生成した力 このメカノケミカル合成処理を行って、ゾノトライト（xonotlite) (6C aO - 6SiO ·Η Ο)を生成するようにしてもよい。ゾノトライトとトバモライトは、どちらもケ  [0011] In the above embodiment, the mechanochemical synthesis of silica and slaked lime in a planetary mill produces tobermorite. May be generated. Zonotolite and Tobermorite are both
2 2  twenty two
ィ酸カルシウム水化物に属し、いずれも断熱材の複合構成要素として同じ作用効果 を有する。  All belong to calcium silicate hydrate, and all have the same effect as a composite component of thermal insulation.
[0012] 従って、本発明の実施に際しては、上記ステップ 1でゾノトライトを生成し、これを用い て、微膨張黒鉛との複合材を生成するようにしても良い。また本発明の他の実施形態 は、図 1に示すステップ 4で生成した複合材を成型せずに、ステップ 5の処理を経な いで、ステップ 6の乾燥処理に移行する。次にこの乾燥処理した粉末状の複合材を 焼成処理して、断熱材を生成しても良い。本実施形態の乾燥、焼成処理は第 1の実 施形態と同一の処理である。  [0012] Accordingly, in the practice of the present invention, zonotlite may be generated in step 1 above, and a composite material with finely expanded graphite may be generated using the zonotlite. In another embodiment of the present invention, the composite material generated in step 4 shown in FIG. 1 is not molded, and the process proceeds to the drying process in step 6 without performing the process in step 5. Next, the dried powdery composite material may be fired to produce a heat insulating material. The drying and firing processes of the present embodiment are the same processes as in the first embodiment.
産業上の利用可能性  Industrial applicability
[0013] 本発明にかかる断熱材を構成するトバモライトゃゾノトライトは、ケィ酸カルシウムで あり、その原料はケィ砂などのシリカと消石灰であるため、豊富にあり、コストが低い。 また、トバモライトゃゾノトライトなどのケィ酸カルシウムと黒鉛は板状のポーラス微構 造をもち、また黒鉛は赤外線の遮蔽性、吸収性があり、これらの複合により、本発明 にかかる断熱材は、真空断熱材の芯材として最適である。また本発明にかかる断熱 材は、軽量で優れた断熱性能を有するとともに、メカノケミカル合成により、常温、常 圧で製造ができるため、製造コストが安い等のメリットがあり、業務用、あるいは建築 用などの断熱材として最適である。 [0013] The tobermorite zonotolite constituting the heat insulating material according to the present invention is calcium silicate, and the raw materials thereof are silica such as key sand and slaked lime, so they are abundant and low in cost. In addition, calcium silicates such as tobermorite and zonotolite and graphite have a plate-like porous structure, and graphite has an infrared shielding property and absorptivity. Ideal as a core material for heat insulation. In addition, the heat insulating material according to the present invention is lightweight and has excellent heat insulating performance, and can be manufactured at normal temperature and normal pressure by mechanochemical synthesis. It is optimal as a heat insulating material.

Claims

請求の範囲 The scope of the claims
[1] ケィ酸カルシウム水化物と微膨張黒鉛とを混合した複合材カゝら構成したことを特徴と する断熱材。  [1] A heat insulating material characterized in that it is composed of a composite material obtained by mixing calcium silicate hydrate and finely expanded graphite.
[2] 真空断熱材の外包材に充填される芯材として使用される断熱材であって、ケィ酸力 ルシゥム水化物と微膨張黒鉛とを混合した複合材カゝらなることを特徴とする断熱材。  [2] A heat insulating material used as a core material filled in the outer packaging material of a vacuum heat insulating material, characterized in that it is a composite material obtained by mixing key acid hydrate hydrate and finely expanded graphite. Insulation.
[3] 前記複合材が粉末状であることを特徴とする請求項 1又は請求項 2に記載の断熱材 [3] The heat insulating material according to claim 1 or 2, wherein the composite material is in a powder form.
[4] 前記複合材が成型されて 、ることを特徴とする請求項 1又は請求項 2に記載の断熱 材。 [4] The heat insulating material according to claim 1 or 2, wherein the composite material is molded.
[5] 前記複合材が焼成されていることを特徴とする請求項 1又は請求項 2に記載の断熱 材。  [5] The heat insulating material according to claim 1 or 2, wherein the composite material is fired.
[6] 前記ケィ酸カルシウム水化物がトバモライトであることを特徴とする請求項 1又は請求 項 2に記載の断熱材。  [6] The heat insulating material according to claim 1 or 2, wherein the calcium silicate hydrate is tobermorite.
[7] 前記ケィ酸カルシウム水化物がゾノトライトであることを特徴とする請求項 1又は請求 項 2に記載の断熱材。  [7] The heat insulating material according to [1] or [2], wherein the calcium silicate hydrate is zonotlite.
[8] 一般断熱材あるいは真空断熱材の芯材として使用される断熱材を製造する方法であ つて、シリカと消石灰とをメカノケミカル処理により合成してケィ酸カルシウム水化物を 生成するステップと、黒鉛と混合酸とを反応させて酸化黒鉛を生成するステップと、前 記酸ィ匕黒鉛を水洗いし、微膨張黒鉛を生成するステップと、前記ケィ酸カルシウム水 化物と前記微膨張黒鉛とを混合し、前記ケィ酸カルシウム水化物と前記微膨張黒鉛 との複合材を生成するステップと、前記複合材を乾燥するステップと、前記複合材に 焼成処理を行うステップとを備えたことを特徴とする断熱材製造方法。  [8] A method for producing a heat insulating material used as a core material of a general heat insulating material or a vacuum heat insulating material, comprising synthesizing silica and slaked lime by mechanochemical treatment to produce calcium silicate hydrate, Reacting graphite and mixed acid to produce graphite oxide, washing the acid-sodium graphite with water to produce finely expanded graphite, and mixing the calcium silicate hydrate with the finely expanded graphite And a step of generating a composite material of the calcium silicate hydrate and the slightly expanded graphite, a step of drying the composite material, and a step of performing a baking treatment on the composite material. Insulation manufacturing method.
[9] 一般断熱材あるいは真空断熱材の芯材として使用される断熱材を製造する方法であ つて、シリカと消石灰とをメカノケミカル処理により合成してケィ酸カルシウム水化物を 生成するステップと、黒鉛と混合酸とを反応させて酸化黒鉛を生成するステップと、前 記酸ィ匕黒鉛を水洗いし、微膨張黒鉛を生成するステップと、前記ケィ酸カルシウム水 化物と前記微膨張黒鉛とを混合し、前記ケィ酸カルシウム水化物と前記微膨張黒鉛 との複合材を生成するステップと、前記複合材を成型するステップと、前記成型した 複合材を乾燥するステップと、前記成型した複合材に焼成処理を行うステップとを備 えたことを特徴とする断熱材製造方法。 [9] A method for producing a heat insulating material used as a core material of a general heat insulating material or a vacuum heat insulating material, comprising synthesizing silica and slaked lime by mechanochemical treatment to produce a calcium silicate hydrate, Reacting graphite and mixed acid to produce graphite oxide, washing the acid-sodium graphite with water to produce finely expanded graphite, and mixing the calcium silicate hydrate with the finely expanded graphite Forming a composite material of the calcium silicate hydrate and the finely expanded graphite, molding the composite material, A method for manufacturing a heat insulating material, comprising: a step of drying a composite material; and a step of performing a baking treatment on the molded composite material.
[10] 前記ケィ酸カルシウム水化物がトバモライトであることを特徴とする請求項 9又は請求 項 10に記載の断熱材製造方法。  [10] The method for producing a heat insulating material according to claim 9 or 10, wherein the calcium hydrate hydrate is tobermorite.
[11] 前記ケィ酸カルシウム水化物がゾノトライトであることを特徴とする請求項 9又は請求 項 10に記載の断熱材製造方法。 [11] The method for manufacturing a heat insulating material according to claim 9 or 10, wherein the calcium silicate hydrate is zonotlite.
PCT/JP2005/004990 2005-03-18 2005-03-18 Insulator and process for producing the same WO2006100730A1 (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58145652A (en) * 1982-02-24 1983-08-30 三菱化学株式会社 Calcium silicate formed body
JPS60112663A (en) * 1983-11-21 1985-06-19 日本インシュレーション株式会社 Manufacture of calcium silicate formed body
JPS6158852A (en) * 1984-08-27 1986-03-26 北野　辰雄 Calcium silicate formed body
JPH02231135A (en) * 1989-03-03 1990-09-13 Lignyte Co Ltd Fire resistant composite material
JPH07291616A (en) * 1994-04-26 1995-11-07 Sumitomo Metal Mining Co Ltd Production of crystalline calcium silicate hydrate
JPH0932153A (en) * 1995-07-20 1997-02-04 Ig Tech Res Inc Fire-resisting panel
JPH10167799A (en) * 1996-12-05 1998-06-23 Mitsubishi Chem Corp Calcium silicate molding product and vacuum heat-insulating material using the same
JP2002308669A (en) * 2001-04-04 2002-10-23 Japan Insulation Co Ltd (calcium silicate)-silica composite formed body

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58145652A (en) * 1982-02-24 1983-08-30 三菱化学株式会社 Calcium silicate formed body
JPS60112663A (en) * 1983-11-21 1985-06-19 日本インシュレーション株式会社 Manufacture of calcium silicate formed body
JPS6158852A (en) * 1984-08-27 1986-03-26 北野　辰雄 Calcium silicate formed body
JPH02231135A (en) * 1989-03-03 1990-09-13 Lignyte Co Ltd Fire resistant composite material
JPH07291616A (en) * 1994-04-26 1995-11-07 Sumitomo Metal Mining Co Ltd Production of crystalline calcium silicate hydrate
JPH0932153A (en) * 1995-07-20 1997-02-04 Ig Tech Res Inc Fire-resisting panel
JPH10167799A (en) * 1996-12-05 1998-06-23 Mitsubishi Chem Corp Calcium silicate molding product and vacuum heat-insulating material using the same
JP2002308669A (en) * 2001-04-04 2002-10-23 Japan Insulation Co Ltd (calcium silicate)-silica composite formed body

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