JP2019098713A - Heat insulation material - Google Patents

Heat insulation material Download PDF

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JP2019098713A
JP2019098713A JP2017235639A JP2017235639A JP2019098713A JP 2019098713 A JP2019098713 A JP 2019098713A JP 2017235639 A JP2017235639 A JP 2017235639A JP 2017235639 A JP2017235639 A JP 2017235639A JP 2019098713 A JP2019098713 A JP 2019098713A
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Japan
Prior art keywords
resin
heat insulating
insulating material
water
composite layer
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JP7029589B2 (en
Inventor
日野　裕久
Hirohisa Hino
裕久 日野
太一 中村
Taichi Nakamura
太一 中村
一摩 及川
Kazuma Oikawa
一摩 及川
茂昭 酒谷
Shigeaki Sakatani
茂昭 酒谷
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Priority to JP2017235639A priority Critical patent/JP7029589B2/en
Priority to US16/198,236 priority patent/US20190177911A1/en
Priority to CN201811448520.3A priority patent/CN109898332B/en
Priority to DE102018131025.0A priority patent/DE102018131025A1/en
Publication of JP2019098713A publication Critical patent/JP2019098713A/en
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D06N3/0059—Organic ingredients with special effects, e.g. oil- or water-repellent, antimicrobial, flame-resistant, magnetic, bactericidal, odour-influencing agents; perfumes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/77—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof
    • D06M11/79—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof with silicon dioxide, silicic acids or their salts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/04—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by at least one layer folded at the edge, e.g. over another layer ; characterised by at least one layer enveloping or enclosing a material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B32B5/20—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material foamed in situ
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/245—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam layer
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/507—Polyesters
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/55—Epoxy resins
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0011—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using non-woven fabrics
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0246—Acrylic resin fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/12—Gel
    • B32B2266/126—Aerogel, i.e. a supercritically dried gel
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
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    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
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    • D—TEXTILES; PAPER
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    • D06M2400/00—Specific information on the treatment or the process itself not provided in D06M23/00-D06M23/18
    • D06M2400/02—Treating compositions in the form of solgel or aerogel
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    • D06N2209/00—Properties of the materials
    • D06N2209/06—Properties of the materials having thermal properties
    • D06N2209/065—Insulating
    • 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

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Thermal Insulation (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

To provide a heat insulation material preventing powder drop of a composite sheet of an unwoven fabric and a silica aerogel.SOLUTION: There is provided a heat insulation material having a composite layer 110 including a silica aerogel in an unwoven fabric, and a coating layer 111 containing a water-soluble resin 112 and a lipophilic resin 113 and covering a surface of the composite layer 110. In the coating layer 111, The lipophilic resin 113 exists as a plurality of island shape in the water-soluble resin 112. The water-soluble resin 112 is a water-soluble polyester resin and the lipophilic resin 113 is an epoxy resin.SELECTED DRAWING: Figure 2

Description

本発明は、断熱材に関するものである。特に、表面がコーティング膜を有する断熱材に関する。 The present invention relates to a heat insulating material. In particular, the present invention relates to a heat insulating material whose surface has a coating film.

近年、モバイル機器の小型化、薄型化、高性能化が進んでいる。モバイル機器は、人が長時間、手で持ち操作する場合が多い。そのため、モバイル機器の表面の温度を低く抑えることは重要である。   BACKGROUND In recent years, mobile devices have become smaller, thinner and higher in performance. Mobile devices are often held and operated by people for long periods of time. Therefore, it is important to keep the temperature of the surface of the mobile device low.

そのためモバイル機器の表面の温度上昇を防ぐ方法として、モバイル機器中の発熱部品の直上に断熱材を設置する事が行われている。世の中には各種の断熱材があるが、断熱性能が高い素材としてシリカエアロゲルがある。   Therefore, as a method of preventing the temperature rise of the surface of the mobile device, it is practiced to place a heat insulating material directly above the heat generating component in the mobile device. There are various thermal insulation materials in the world, but there is silica airgel as a material with high thermal insulation performance.

シリカエアロゲルは、９０％以上の空隙率を有するナノ多孔体として知られている。また経年劣化や耐熱性の観点から、既存の断熱材よりも優れており、１５ｍＷ／ｍＫ前後の優れた熱伝導率を有していることが知られている。しかしながら、シリカエアロゲルは、数１０ｎｍオーダーの微細なシリカ粒子が点接触で繋がったネットワーク構造であるため、機械的強度があまり大きくない。そこで、及川他は、その脆弱性を克服するために、シリカエアロゲルを繊維や不織布、そして樹脂などと複合化し、シート化することで、強度を向上することを提案している。   Silica airgel is known as a nanoporous body having a porosity of 90% or more. Moreover, it is known from the viewpoint of aged deterioration and heat resistance that it is superior to existing heat insulating materials and has an excellent thermal conductivity of about 15 mW / mK. However, since the silica airgel is a network structure in which fine silica particles of several tens of nm are connected by point contact, the mechanical strength is not very high. Therefore, Oikawa et al. Have proposed that the strength be improved by combining the silica airgel with fibers, non-woven fabrics, and resins, etc. to form a sheet in order to overcome the fragility.

ところで、その微小サイズのシリカエアロゲルのネットワーク構造は、本質的に脆弱性があるため、個々の粒子がシリカエアロゲルのネットワーク構造から外れてしまう恐れがある。そして、その外れたシリカエアロゲル粒子がモバイル機器の内部で浮遊することで、モバイル機器の故障を引き起こすことになる。   By the way, since the network structure of the micro-sized silica airgel is inherently fragile, there is a risk that individual particles may deviate from the network structure of the silica airgel. The floating silica airgel particles float inside the mobile device, which causes the failure of the mobile device.

それを防止するためには、一般的にシリカエアロゲルの複合化シートをフィルムラミネートして覆い、袋とじ形状（以下、ラミネートパッキングと称する）にするなどの対策を実施している。しかしながら、様々な形状・サイズに適応したラミネートパッキングを行うことは、カスタムメイドとなるため、非常にコスト高になり、モバイル機器のコストアップに繋がり、商品の競争力を損なう一因となってきている。更には、ラミネートパッキングは、シリカエアロゲルの複合化シートを袋閉じ構造で密封しているが、シートとラミネートフィルムの間に空間があるため、放熱効果が減少するという機能面の課題も顕著になっている。   In order to prevent this, generally, a composite sheet of silica airgel is film-laminated and covered, and a countermeasure such as forming a bag-like shape (hereinafter, referred to as laminate packing) is implemented. However, laminate packing adapted to various shapes and sizes is very custom-made, resulting in extremely high cost, which leads to an increase in the cost of mobile devices, and is a factor that impairs the competitiveness of products. There is. Furthermore, although the laminate packing seals the composite sheet of the silica airgel in a bag-closing structure, there is a space between the sheet and the laminate film, which makes the functional problem that the heat radiation effect is reduced become remarkable. ing.

そこで低コストでシリカエアロゲルの複合化シートの粉落ちを防止し、且つ汎用性に富み、断熱性能も落とさない形態が望まれている。   Then, the form which prevents the powder fall off of the composite sheet of a silica airgel at low cost, and is versatile is also desired, and the form which does not drop an insulation performance is desired.

特許第６０６４１４９号公報Patent No. 6064149

図１は、従来のラミネートパッキングしたシリカエアロゲルの断熱材１０１の断面を示す図である。不織布１０６にシリカエアロゲル１０５を担持し複合化した複合層１０２と、その外側にシリカエアロゲル層１０３とで複層化した構造の断熱材であり、これをラミネートフィルム１０４で袋閉じした構造をとっている。この構造ではラミネートフィルム１０４は、シリカエアロゲルの複合化シートを袋閉じして覆うことで、粉落ちしたシリカエアロゲル微粒子が周囲に飛び散り拡散することを防止できる。   FIG. 1 is a cross-sectional view of a conventional laminate-packed silica airgel insulation 101. It is a heat insulating material with a structure in which the composite layer 102 is formed by supporting the silica aerogel 105 on the non-woven fabric 106 to form a composite, and the silica aerogel layer 103 on the outside thereof. There is. In this structure, the laminated film 104 can be closed by covering and closing the composite sheet of the silica airgel so that the powdery silica airgel fine particles can be prevented from being scattered and diffused around.

しかし、ラミネートフィルム１０４とシリカエアロゲル層１０３は、密着していないため、その間に空気層が出来てしまう。そのためモバイル機器等の断熱効果が、弱くなってしまうという課題を有している。   However, since the laminate film 104 and the silica airgel layer 103 are not in close contact with each other, an air layer is formed therebetween. Therefore, it has the subject that the heat insulation effect, such as a mobile apparatus, will become weak.

本発明は、従来の課題を解決するもので、シリカエアロゲルの複合化シートの粉落ちを防止した断熱材の被覆構造を提供することを目的とする。   An object of the present invention is to solve the conventional problems, and it is an object of the present invention to provide a coating structure of a heat insulating material in which powdering of a composite sheet of silica airgel is prevented.

上記目的を達成するために、不織布にシリカエアロゲルを内包した複合層と、親水性樹脂と親油性樹脂とを含み、上記複合層の表面を被覆するコーティング膜と、を有する断熱材を用いる。   In order to achieve the above object, a heat insulating material having a composite layer in which a silica airgel is included in a non-woven fabric, and a coating film which contains a hydrophilic resin and a lipophilic resin and covers the surface of the composite layer is used.

以上のように、本発明の不織布及びシリカエアロゲル複合層の被覆構造は、シリカエアロゲルの複合層表面への塗料コーティングにより、塗布部の形状にとらわれずシリカエアロゲルの複合層に保護膜ができる。この膜は、高い密着性を有する。それにより、優れた断熱性を兼ね備えた断熱材と、その断熱材を用いた機器、その断熱材のコーティング構造形成の方法を提供することをすることができる。   As described above, the coating structure of the non-woven fabric and the silica airgel composite layer of the present invention is not limited by the shape of the coated part by the paint coating on the surface of the silica airgel composite layer, and a protective film can be formed on the silica airgel composite layer. This film has high adhesion. Thus, it is possible to provide a heat insulating material having excellent heat insulating properties, an apparatus using the heat insulating material, and a method of forming a coating structure of the heat insulating material.

従来のフィルムラミネートした断熱材の断面を示す図Figure showing a cross section of a conventional film laminated insulation （ａ）実施の形態の塗料コーティングにより形成された断熱材の断面図、（ｂ）実施の形態のコーティング膜の平面図(A) Cross section of heat insulating material formed by paint coating of embodiment, (b) Plan view of coating film of embodiment 実施の形態のコーティング膜の外観を示す図The figure which shows the external appearance of the coating film of embodiment

以下本発明の実施の形態について、図面を参照しながら説明する。
図２は、実施の形態の塗料コーティングがされた断熱材１１０の断面を示す。図２（ｂ）に実施の形態のコーティング膜の平面図を示す。図３に実施の形態のコーティング膜の外観を示す図
断熱材１１０は、不織布１０６及びシリカエアロゲル１０５からなる複合層１０２の周囲に、コーティング膜１１１が形成された構造である。複合層１０２からはみ出している不織布１０６の繊維は、コーティング膜１１１中の水溶性樹脂１１２や反応性の親油性樹脂１１３と密着している。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 2 shows the cross section of the heat insulating material 110 with the paint coating of the embodiment. The top view of the coating film of embodiment is shown in FIG.2 (b). The figure which shows the external appearance of the coating film of embodiment in FIG. 3 The heat insulating material 110 is the structure in which the coating film 111 was formed around the composite layer 102 which consists of the nonwoven fabric 106 and the silica airgel 105. FIG. The fibers of the non-woven fabric 106 protruding from the composite layer 102 are in close contact with the water-soluble resin 112 in the coating film 111 and the reactive lipophilic resin 113.

＜複合層１０２＞
複合層１０２は、厚み０．０５〜１．０ｍｍの不織布１０６に、ナノサイズの多孔質構造を有するシリカエアロゲル１０５を内包させたシートである。熱伝導率は、０．０１〜０．１Ｗ／ｍＫである。 <Complex Layer 102>
The composite layer 102 is a sheet in which a silica airgel 105 having a nano-sized porous structure is included in a non-woven fabric 106 having a thickness of 0.05 to 1.0 mm. The thermal conductivity is 0.01 to 0.1 W / mK.

通常、不織布１０６の熱伝導率は、０．０３０〜０．０６０Ｗ／ｍＫであり、この値は不織布１０６の固体熱伝導成分と不織布の空隙に存在している空気（窒素分子）の伝熱成分のほぼ総和と見なせる。６
この空隙に低熱伝導率材料（一般に０．０１０〜０．０１５Ｗ／ｍＫといわれる）としてシリカエアロゲル１０５を内包させることで上記低熱伝導率を実現できる。 Usually, the thermal conductivity of the non-woven fabric 106 is 0.030 to 0.060 W / mK, which is the heat transfer component of air (nitrogen molecules) present in the solid heat-conductive component of the non-woven fabric 106 and the voids of the non-woven fabric. It can be regarded as a total sum of 6
The low thermal conductivity can be realized by including the silica airgel 105 in the air gap as a low thermal conductivity material (generally referred to as 0.010 to 0.015 W / mK).

一般に、常温における静止空気の熱伝導率は、０．０２６Ｗ／ｍＫ前後といわれており、不織布１０６の熱伝導率はこの静止空気の値よりも大きい。   Generally, the thermal conductivity of stationary air at normal temperature is said to be around 0.026 W / mK, and the thermal conductivity of the non-woven fabric 106 is larger than the value of this stationary air.

複合層１０２の特徴は、その熱伝導率が、静止空気の熱伝導率よりも小さいシートであることである。   The feature of the composite layer 102 is that it is a sheet whose thermal conductivity is smaller than that of the stationary air.

複合層１０２は、断熱性の他に、撥水性、吸音性を有しており、不織布１０６の種類を選べば、耐熱性や難燃性を付与することができる。   The composite layer 102 has water repellency and sound absorption as well as heat insulation, and heat resistance and flame retardancy can be imparted if the type of the non-woven fabric 106 is selected.

本実施の形態では耐熱性や難燃性を付与する為に、不織布１０６として酸化アクリルを用いたが、他にもガラス繊維紙を用いてもよい。   Although acrylic oxide is used as the non-woven fabric 106 in the present embodiment in order to impart heat resistance and flame retardancy, glass fiber paper may be used as well.

＜複合層１０２の熱伝導率＞
本実施の形態において使用する複合層１０２の熱伝導率は、０．０１〜０．１Ｗ／ｍ・Ｋの範囲内にある。複合層１０２の熱伝導率は、低ければ低いほどその断熱効果が高くなり、同じ断熱効果を得るために必要な複合層１０２の厚さを薄くすることができる。 Thermal Conductivity of Composite Layer 102
The thermal conductivity of the composite layer 102 used in the present embodiment is in the range of 0.01 to 0.1 W / m · K. The lower the thermal conductivity of the composite layer 102, the higher its thermal insulation effect, and the thickness of the composite layer 102 required to obtain the same thermal insulation effect can be reduced.

他方、熱伝導率が０．１Ｗ／ｍ・Ｋより大きくなれば断熱効果が低下し、必要な断熱効果を得るためには複合層１０２の厚さを増大しなくてはならないので好ましくない。   On the other hand, if the thermal conductivity is greater than 0.1 W / m · K, the heat insulating effect is reduced, and the thickness of the composite layer 102 must be increased to obtain the necessary heat insulating effect, which is not preferable.

＜複合層１０２の厚さ＞
複合層１０２の厚さは０．０５ｍｍ〜２ｍｍの範囲内にあり、好ましくは０．５ｍｍ〜１ｍｍの範囲内にある。複合層１０２の厚さが０．０５ｍｍよりも薄い場合には厚さ方向の断熱効果が低下するので、熱伝導率が（現在存在し得ない程の）かなり低い低熱伝導材料を選択しなければその一面から他面への厚さ方向の伝熱を良好に低減させ得ない。 <Thickness of Composite Layer 102>
The thickness of the composite layer 102 is in the range of 0.05 mm to 2 mm, preferably in the range of 0.5 mm to 1 mm. If the thickness of the composite layer 102 is less than 0.05 mm, the thermal insulation effect in the thickness direction is reduced, so if a low thermal conductivity material (having a temperature that can not be present at present) is selected too low The heat transfer in the thickness direction from one side to the other side can not be favorably reduced.

＜複合層１０２の製造方法＞
複合層１０２の製造方法の一例を示す。 <Method of Manufacturing Composite Layer 102>
An example of the manufacturing method of the composite layer 102 is shown.

（１）原料混合：高モル珪酸ソーダ（珪酸水溶液、Ｓｉ濃度１４％）に触媒として濃塩酸（１２Ｎ）を１．４ｗｔ％添加し攪拌し、ゾル溶液を調合する。   (1) Raw material mixing: 1.4 wt% of concentrated hydrochloric acid (12 N) as a catalyst is added to high molar sodium silicate (silicic acid aqueous solution, Si concentration 14%) and stirred to prepare a sol solution.

（２）含浸：不織布１０６（材質：酸化アクリル、厚み：０．４ｕｍ、目付５０ｇ／ｍ２、寸法１２ｍｍ角）にゾル溶液を注ぎ、ロールでゾル溶液を不織布１０６に押し込んで含浸させる。   (2) Impregnation: The sol solution is poured into the non-woven fabric 106 (material: acrylic oxide, thickness: 0.4 μm, basis weight 50 g / m 2, size 12 mm square), and the sol solution is pressed into the non-woven fabric 106 to impregnate it with a roll.

（３）ゾル溶液を含浸させた不織布をＰＰフィルム（厚み４０ｕｍ×２枚）に挟み、室温２３℃で約２０分放置してゾルをゲル化させる。   (3) The non-woven fabric impregnated with the sol solution is sandwiched between PP films (thickness 40 μm × 2 sheets), and left at room temperature at 23 ° C. for about 20 minutes to gel the sol.

（４）厚み規制：ゲル化を確認後、ギャップを６５０ｕｍ（フィルム厚込み）に設定した２軸ロールにフィルムごと含浸された不織布１０６を通して、不織布１０６から余分なゲルを絞りだして厚み７００ｕｍ狙いで規制する。   (4) Thickness control: After confirming gelation, pass through the non-woven fabric 106 impregnated with the whole film into a biaxial roll with a gap set to 650 um (film thickness included), draw excess gel from the non-woven fabric 106 and aim at 700 μm thickness. regulate.

（５）養生：容器にフィルムごとゲルシートを入れて、乾燥防止のために８５℃／８５ＲＨ％の恒温恒湿槽に３時間入れて、シリカ粒子を成長（シラノールの脱水縮合反応）させて多孔質構造を形成させる。   (5) Curing: Put the gel sheet together with the film in a container, put it in a constant temperature and humidity chamber at 85 ° C / 85RH% for 3 hours to prevent drying, and grow silica particles (dehydration condensation reaction of silanol) to make porous Form the structure.

（６）フィルム剥がし：養生容器からシートを取り出して、フィルムを剥がす。   (6) Film peeling: Remove the sheet from the curing container and peel off the film.

（７）疎水化１（塩酸浸漬工程）：ゲルシートを塩酸（６〜１２規定）に浸漬後、常温２３℃で１時間放置してゲルシートの中に塩酸を取り込む。   (7) Hydrophobization 1 (hydrochloric acid immersion step): After immersing the gel sheet in hydrochloric acid (6 to 12 N), the gel sheet is allowed to stand at normal temperature 23 ° C. for 1 hour to incorporate hydrochloric acid into the gel sheet.

（８）疎水化２（シロキサン処理工程）：ゲルシートを例えば、シリル化剤であるオクタメチルトリシロキサンと両親媒性溶剤である２−プロパノール（ＩＰＡ）の混合液に浸漬させて、５５℃の恒温槽に入れて２時間反応させる。トリメチルシロキサン結合が形成され始めると、ゲルシートから塩酸水が排出され、２液分離する（上層にシリル化剤、下層に塩酸水）。   (8) Hydrophobization 2 (siloxane treatment step): A gel sheet is immersed in, for example, a mixed solution of octamethyltrisiloxane which is a silylating agent and 2-propanol (IPA) which is an amphiphilic solvent, and a constant temperature of 55 ° C. Place in tank and let react for 2 hours. When a trimethylsiloxane bond starts to form, the gel sheet is drained from hydrochloric acid water and separated into two parts (a silylating agent in the upper layer, and a hydrochloric acid water in the lower layer).

（９）乾燥：ゲルシートを１５０℃の恒温槽に移して２時間乾燥させる。   (9) Drying: The gel sheet is transferred to a thermostat at 150 ° C. and dried for 2 hours.

＜複合層１０２へのコーティング＞
複合層１０２は、不織布１０６とシリカエアロゲル１０５の複合体であるが、表層部及び端部では、不織布１０６の繊維の一部が表層や端部から飛び出している物を用いる。複合層１０２から、不織布１０６の繊維が飛び出した構造を形成する方法としては、どのような方法でもよく、限定はしない。 <Coating to Composite Layer 102>
The composite layer 102 is a composite of the non-woven fabric 106 and the silica airgel 105. In the surface layer portion and the end portion, a material in which a part of the fibers of the non-woven fabric 106 protrudes from the surface layer or the edge portion is used. Any method may be used to form a structure in which the fibers of the non-woven fabric 106 jump out of the composite layer 102, and is not limited.

一例としては、上記複合層１０２の製造方法で示した（１）から（９）の工程を終えて出来上がった複合層１０２の表面や端部を粘着ローラーやブラシ等で荒らして、繊維を露出せるなどが上げられる。または、ゲルシートの製造工程で、不織布１０６の繊維を露出するようにシリカエアロゲル１０５の厚みや不織布１０６の厚みを最適設定することで、削らなくても繊維が飛び出ている複合層１０２を作成してもよい。   As an example, the surface and the end of the composite layer 102 finished after the steps (1) to (9) described in the method for producing the composite layer 102 described above are roughened with an adhesive roller, a brush or the like to expose the fibers. Etc. are raised. Alternatively, in the gel sheet manufacturing process, the thickness of the silica airgel 105 and the thickness of the non-woven fabric 106 are optimally set so as to expose the fibers of the non-woven fabric 106 to create the composite layer 102 in which the fibers fly out without scraping. It is also good.

＜コーティング塗料＞
コーティング塗料は、少なくとも水溶性のベース塗料と、熱硬化性の親油性樹脂１１３で構成されている。 <Coating paint>
The coating paint is composed of at least a water-soluble base paint and a thermosetting lipophilic resin 113.

ベース塗料は、水溶性塗料で、水溶媒の中に粒子状の水溶性樹脂１１２を分散させたものが主流となっている。本実施の形態のシリカエアロゲル１０５は、疎水化することで特異の構造形態を取っているため、逆に、親油性の樹脂とは非常に馴染み性がよく、親油性樹脂と馴染むことで、その独自のネットワーク構造が破壊されてしまう。そのため、コーティング塗料は、基本的には、水溶性のものであることが必須となる。   The base paint is a water-soluble paint in which a particulate water-soluble resin 112 is dispersed in a water solvent. Since the silica airgel 105 of the present embodiment takes a specific structural form by hydrophobization, conversely, it is very compatible with the lipophilic resin, and by being compatible with the lipophilic resin, Your own network structure will be destroyed. Therefore, the coating paint is basically required to be water soluble.

水溶性塗料は、水溶媒への馴染みを良いことが必要であり、水溶性樹脂１１２の骨格に親水性の官能基をもった自己乳化タイプや、乳化剤を用いて樹脂を強制的に分散させた強制乳化タイプ分類できる。また用いられるベースとなる水溶性樹脂１１２の種類は、アクリル樹脂、ポリウレタン樹脂、ポリエステル樹脂、エポキシ樹脂、シリコーン樹脂、フッ素樹脂などが挙げられる。   The water-soluble paint needs to be well compatible with the water solvent, and the resin is forcibly dispersed using a self-emulsification type having a hydrophilic functional group in the skeleton of the water-soluble resin 112 or an emulsifier. Forced emulsification type classification is possible. Further, as a type of the water-soluble resin 112 to be used as the base, acrylic resin, polyurethane resin, polyester resin, epoxy resin, silicone resin, fluorine resin and the like can be mentioned.

それぞれの水溶性樹脂１１２の特徴は、一般的には、アクリル樹脂は、耐光性，耐候性が良い、モノマーの種類が多い、比較的安価、無色透明であり光沢が良好などの特徴を有している。   The characteristics of each water-soluble resin 112 are that, in general, acrylic resin has characteristics such as good light resistance, good weather resistance, many types of monomers, relatively inexpensive, transparent and colorless, and good gloss. ing.

また、ポリウレタン樹脂は、その内部にウレタン結合、ウレア結合等を有することから、強く凝集したハードセグメントとフレキシブルなソフトセグメントから構成されているため、基材に対する密着性に優れる、塗膜硬度が高く、高弾で耐摩耗性が良好、耐久性がよい、耐水性、耐薬品性がよいなどの特徴がある。   Further, since the polyurethane resin has a urethane bond, a urea bond, etc. in its interior, it is composed of a hard coagulated hard segment and a flexible soft segment, so it has excellent adhesion to a substrate, high coating hardness. It has features such as high impact resistance, good wear resistance, good durability, good water resistance, and good chemical resistance.

また、ポリエステル樹脂は、結晶性を抑えた共重合ポリエステルやポリエステル主鎖に脂肪酸側鎖をエステル結合でもつアルキド樹脂が用いられる。主鎖骨格中にカルボキシル基と水酸基の反応でできるエステル結合を有していて、基材への高い密着性，高い塗膜強度、耐熱性が優れている。   Further, as the polyester resin, a copolyester having reduced crystallinity and an alkyd resin having a fatty acid side chain as an ester bond in the polyester main chain are used. It has an ester bond formed by the reaction of a carboxyl group and a hydroxyl group in the main chain skeleton, and has high adhesion to a substrate, high coating strength, and heat resistance.

これらの水系樹脂をベースとした塗料は、通常の溶剤系の塗料と比較すると、一般的な課題として、（１）分子量（網目構造）が比較的小さいため、塗膜物性が弱い。（２）親水性基をベースとした膜の性質上、耐水性が弱い。（３）架橋反応が行われないため、Ｔｇが低く、密着性が低い。などが挙げられる。   Coatings based on these water-based resins, as a general problem, have relatively low molecular weight (network structure) as compared with ordinary solvent-based coatings, and thus the coating film properties are weak. (2) Water resistance is weak due to the nature of membranes based on hydrophilic groups. (3) Since the crosslinking reaction is not performed, Tg is low and adhesion is low. Etc.

そこで、本実施の形態では、これらの課題の対策として、コーティング塗料において、熱硬化性の親油性樹脂１１３を水溶性樹脂１１２中に加えて、“海島構造”の島のように微細に分散させた独自の塗料を用いる。   Therefore, in the present embodiment, as a countermeasure for these problems, in the coating paint, a thermosetting lipophilic resin 113 is added to the water-soluble resin 112, and finely dispersed like islands of "sea-island structure". Use their own paint.

熱硬化性の親油性樹脂１１３は、撥水性の不織布１０６の繊維と馴染みが良いため、接合し熱硬化反応をすることで、強い密着性を発揮することを見出した。なお、水溶性樹脂１１２のベース塗料中に、親油性（＝撥水性）の熱硬化性の親油性樹脂１１３を小さく分散させるためには、水溶性樹脂１１２と親油性樹脂１１３の両方に馴染みを向上させることの出来る各種の界面活性剤やアルコール等に、効果があると判明した。特に、各種アルコールのうち、２−プロパノール（ＩＰＡ）は、両親媒性溶剤であり、これが熱硬化性の親油性樹脂１１３の粒子径を制御することが出来て、この粒子径が小さい方が、不織布１０６の繊維との密着力が向上することも発見した。   Since the thermosetting lipophilic resin 113 is well compatible with the fibers of the water repellent non-woven fabric 106, it has been found that by bonding and performing a thermosetting reaction, it exhibits strong adhesion. In order to disperse the lipophilic (= water repellent) thermosetting lipophilic resin 113 small in the base paint of the water-soluble resin 112, it should be compatible with both the water-soluble resin 112 and the lipophilic resin 113. It turned out that various surfactants, alcohols, etc. which can be improved are effective. In particular, among various alcohols, 2-propanol (IPA) is an amphiphilic solvent, which can control the particle diameter of the thermosetting lipophilic resin 113, and the smaller particle diameter is It has also been discovered that the adhesion of the non-woven fabric 106 to the fibers is improved.

本実施の形態の親油性樹脂１１３を水溶性樹脂１１２中に、“海島構造”の島のように分散させた塗料（以降は、この構造を『海島構造』と呼ぶ）に用いる水溶性樹脂１１２としては、水性アクリル樹脂、水性ウレタン樹脂、水性ポリエステル樹脂が適しており、更には、水性ポリエステル樹脂が最も適している。   A water-soluble resin 112 used for a paint in which the lipophilic resin 113 of the present embodiment is dispersed like a "sea-island structure" in a water-soluble resin 112 (hereinafter, this structure is referred to as a "sea-island structure") As the water-soluble resin, an aqueous acrylic resin, an aqueous urethane resin, and an aqueous polyester resin are suitable, and further, an aqueous polyester resin is most suitable.

親油性樹脂１１３としては、反応性のある一液性エポキシ樹脂が適していることを見出した。通常、親油性樹脂１１３を水性塗料に添加する場合は、相溶性の良い水溶性タイプの樹脂が使われるが一般的であるが、本実施の形態では、複合層１０２から飛び出した不織布１０６の繊維と密着し、コーティング膜１１１との密着性を上げることを目的にしているため、それぞれの繊維をピンポイントで接着補強するめには、水性塗料に溶け込まないことが重要となる。そのため、親油性の一液性エポキシ樹脂を選定し、水性塗料中に海島構造状に微細分散させることが必要となる。   As the lipophilic resin 113, it has been found that a reactive one-component epoxy resin is suitable. In general, when the lipophilic resin 113 is added to the water-based paint, a compatible water-soluble resin is generally used, but in the present embodiment, the fibers of the non-woven fabric 106 protruding from the composite layer 102 In order to adhere to each other and to increase the adhesion to the coating film 111, it is important not to dissolve in the water-based paint in order to adhere and reinforce each fiber at a pinpoint. Therefore, it is necessary to select a lipophilic one-component epoxy resin and finely disperse it in an aqueous paint in a sea-island structure.

＜海島構造＞
塗料コーティングにて形成された断熱材１１０の構造は、不織布１０６にシリカエアロゲル１０５が凝集接合し一体化した複合層１０２の表面層に不織布１０６の繊維が飛び出した構造になっている。 Sea-island structure
The structure of the heat insulating material 110 formed by the paint coating has a structure in which the fibers of the non-woven fabric 106 fly out to the surface layer of the composite layer 102 in which the silica airgel 105 is cohesively bonded to the non-woven fabric 106 and integrated.

その繊維とコーティング塗料が接着しており、コーティング膜１１１には、親油性樹脂１１３が海島構造で点在して分散した形状の断熱材１１０を形成している。コーティング膜１１１の厚みは、１〜１００μｍが好ましく、更には、１０〜３０μｍが好ましい。膜厚が１μｍより薄いと膜強度が弱いため、破れたりし易くなる。また、１００μｍより厚いと、断熱性能が悪くなる。   The fiber and the coating paint adhere to each other, and the coating film 111 forms a heat insulating material 110 having a shape in which the lipophilic resin 113 is dispersed in a sea-island structure. The thickness of the coating film 111 is preferably 1 to 100 μm, and more preferably 10 to 30 μm. If the film thickness is smaller than 1 μm, the film strength is weak, so it is easily broken. If the thickness is more than 100 μm, the heat insulation performance is degraded.

また、親油性樹脂１１３の粒子径は、０．１〜５０μが好ましく、エポキシの添加量は、コーティング膜中に５〜５０重量％が好ましい。   The particle diameter of the lipophilic resin 113 is preferably 0.1 to 50 μ, and the amount of the epoxy added is preferably 5 to 50% by weight in the coating film.

粒子径が０．１μｍより小さいと、親水性が強くなるため、膜強度が下がってしまう。また、粒子径が５０μｍより大きいと、不織布の繊維との接着ポンイトが少なくなるため密着性が低くなる。   If the particle size is smaller than 0.1 μm, the hydrophilicity is increased, and the film strength is reduced. If the particle diameter is larger than 50 μm, the adhesion points with the fibers of the non-woven fabric decrease, and the adhesion is lowered.

エポキシの添加量は、コーティング膜中に５重量％より少なくなると、不織布１０６の繊維との接触ポンイトが少なくなるため密着性が低くなる。また５０重量％より多くなると、親油性のシリカエアロゲル１０５との馴染みが良くなるため、シリカエアロゲル１０５微細構造が破壊されてしまい、その結果、断熱性が悪くなる。さらに、好ましくは、１０〜３０重量％が好ましい。   If the amount of the epoxy added is less than 5% by weight in the coating film, the contact point with the fibers of the non-woven fabric 106 decreases, resulting in poor adhesion. If the content is more than 50% by weight, the compatibility with the lipophilic silica airgel 105 is improved, so that the fine structure of the silica airgel 105 is broken, and as a result, the heat insulating property is deteriorated. Furthermore, preferably, 10 to 30% by weight is preferable.

本実施の形態で用いた水溶性樹脂１１２と熱硬化性の親油性樹脂１１３の実施例を示す。なお、本実施の形態にて提示の断熱材構造は、これら例示の材料のみに限定はされるものではない。   Examples of the water-soluble resin 112 and the thermosetting lipophilic resin 113 used in the present embodiment are shown. In addition, the heat insulating material structure shown by this Embodiment is not limited only to these illustrated materials.

水溶性樹脂１１２としては、水溶性ポリエステル樹脂「プラスコートＺ−８８０」（互応化学工業株式会社）を用いた。また、熱硬化性の親油性樹脂１１３としては、「ノバキュアＨＸ３９４１ＨＰ」（旭化成株式会社）を用いた。また相溶化剤として、両親媒性溶剤である２−プロパノール（ＩＰＡ）を用いた。   As the water-soluble resin 112, a water-soluble polyester resin "PLUSCOAT Z-880" (Hyoto Chemical Industry Co., Ltd.) was used. Further, as the thermosetting lipophilic resin 113, “Novacua HX3941HP” (Asahi Kasei Corporation) was used. Moreover, 2-propanol (IPA) which is an amphiphilic solvent was used as a compatibilizer.

（１）海島構造形成するコーティング塗料の組成例
（ａ）水溶性樹脂１１２：水性ポリエステル樹脂：プラスコートＺ−８８０（固形分２５ｗｔ％）：１００部
（ｂ）親油性樹脂１１３：一液性エポキシ樹脂：ノバキュアＨＸ３９４１ＨＰ（イミダゾール比率は、１／３ｗｔ％、エポキシ比率は、２／３ｗｔ％） ：１０部
（ｃ）相溶化剤：２−プロパノール（ＩＰＡ）：１０部
（２）コーティング塗料の作製
各（ａ）〜（ｃ）を秤量し、ディスパーにて１５分間攪拌混合して、海島構造形成用のコーティング塗料を作成した。 (1) Composition example of coating paint forming sea island structure (a) Water-soluble resin 112: Water-based polyester resin: Plus coat Z-880 (solid content 25 wt%): 100 parts (b) Lipophilic resin 113: One-component epoxy Resin: Novac HX 3941 HP (imidazole ratio 1/3 wt%, epoxy ratio 2/3 wt%): 10 parts (c) Compatibilizer: 2-propanol (IPA): 10 parts (2) Preparation of coating paints (A) to (c) were weighed and stirred and mixed for 15 minutes with a disper to prepare a coating paint for forming a sea-island structure.

（３）コーティング塗料の塗工：不織布１０６の繊維が、表層部にはみ出した形状の複合層１０２に、印刷マスクとスキージを用いてコーティング塗料印刷塗布する。塗布した後、加熱硬化することでコーティング膜１１１を形成する。   (3) Coating of coating paint: The coating paint is applied by coating using a printing mask and a squeegee to the composite layer 102 in a shape in which the fibers of the non-woven fabric 106 protrude to the surface portion. After the application, the coating film 111 is formed by heat curing.

なお、コーティング膜１１１は、複合層１０２の端部も覆う様に塗布することで、複合層１０２の全体を覆うことが出来る。これを両面、及び端部への塗布を繰り返すことで、全面を塗料コーティングすることが出来る。   The coating film 111 can be applied to cover the end of the composite layer 102 to cover the entire composite layer 102. The entire surface can be coated by coating this on both sides and by repeating the application to the end.

なお、塗布面積が小さいばあいは、ディッピング法にて、複合層１０２全体を塗料の中に全体浸漬する方法を取っても良い。   When the application area is small, the entire composite layer 102 may be entirely immersed in the paint by dipping.

（４）コーティング塗料の硬化：コーティング塗料を両面に塗工した複合層１０２を１２０℃の恒温槽にて１５分乾燥することで、水を揮発させると共に親油性樹脂１１３であるエポキシ樹脂粒子の粒子を反応硬化させて、コーティング膜１１１を完成させることが出来る。   (4) Curing of coating paint: particles of epoxy resin particles, which are lipophilic resin 113 and volatilize water, by drying the composite layer 102 coated with the coating paint on both sides in a 120 ° C. thermostatic bath for 15 minutes Can be reacted and cured to complete the coating film 111.

（５）コーティング膜１１１の形状：塗膜の厚みは、厚み３０μｍ、熱硬化性の親油性樹脂１１３の粒子径は、５μｍ、熱硬化性の親油性樹脂１１３の粒子比率は、約２０％であった。   (5) Shape of the coating film 111: The thickness of the coating film is 30 μm thick, the particle diameter of the thermosetting lipophilic resin 113 is 5 μm, and the particle ratio of the thermosetting lipophilic resin 113 is about 20%. there were.

＜コーティング塗料にてコーティングした複合層１０２の構造と特性＞
複合層１０２の不織布１０６は、その繊維が複合層１０２の表面層から突き出ており、その繊維と最表層部のコーティング膜１１１の親油性樹脂１１３とが、親油性同士で馴染みがよく、強い接着反応することで優れた高密着性を発揮する。 <Structure and Properties of Composite Layer 102 Coated with Coating Paint>
The fibers of the non-woven fabric 106 of the composite layer 102 protrude from the surface layer of the composite layer 102, and the fibers and the oleophilic resin 113 of the coating film 111 of the outermost layer are compatible with each other in lipophilicity and have strong adhesion It exhibits excellent high adhesion by reacting.

更に、コーティング膜１１１には、反応性の親油性樹脂１１３が“海島構造”の島のように分散されており、不織布１０６の繊維と化学反応することで、強い密着性を発揮する。   Furthermore, in the coating film 111, the reactive lipophilic resin 113 is dispersed like an island of “sea-island structure”, and exhibits strong adhesion by chemically reacting with the fibers of the non-woven fabric 106.

断熱材１１０は、発熱部品の曲面表面に覆い被せて断熱効果を付与する場合があるが、ベースのポリエステル樹脂は可撓性があり、かつ上記の構造により高密着性を発揮するため、複合層１０２コーティング樹脂膜との剥がれが起こらず、断熱材１１０は、優れた断熱性能を発揮することができる。また、複合層１０２に内包されるシリカエアロゲル１０５微粒子が露出することも防ぐことが出来る。   The heat insulating material 110 may cover the curved surface of the heat generating component to provide a heat insulating effect, but the polyester resin of the base has flexibility and exhibits high adhesion by the above structure, so the composite layer Peeling with the coating resin film 102 does not occur, and the heat insulating material 110 can exhibit excellent heat insulating performance. Moreover, it can also prevent that the silica airgel 105 microparticles | fine-particles included in the composite layer 102 are exposed.

＜複合層１０２と、コーティング樹脂膜との密着力＞
複合層１０２にコーティング樹脂膜を幅１０ｍｍ、厚み３０μｍの膜を形成し、９０度ピール法で引っ張り強度を測定した。 <Adhesive Force between Composite Layer 102 and Coating Resin Film>
A coating resin film having a width of 10 mm and a thickness of 30 μm was formed on the composite layer 102, and the tensile strength was measured by a 90 ° peel method.

（ａ）不織布１０６の繊維が出ていない場合：０．７Ｎ、（ｂ）不織布１０６の繊維が出ていない場合：５．５Ｎ、（ｃ）（ｂ）で熱硬化性樹脂が入ってない場合：２．３Ｎ
＜断熱材１１０の熱伝導率＞
複合層１０２にコーティング膜１１１を３０μｍ厚みでコーティングした断熱材１１０の熱伝導率は、０．０７Ｗ／ｍ・Ｋであった。これは、複合層１０２単独と比較しても遜色の無い優れた断熱性能を発揮していることを確認出来た。 (A) When the fibers of the non-woven fabric 106 do not go out: 0.7 N, (b) When the fibers of the non-woven fabric 106 do not go out: 5.5 N, (c) (b) when the thermosetting resin is not contained : 2.3 N
<Thermal conductivity of the heat insulating material 110>
The thermal conductivity of the heat insulating material 110 in which the coating layer 111 was coated to a thickness of 30 μm on the composite layer 102 was 0.07 W / m · K. It could be confirmed that this exhibited excellent heat insulation performance comparable to that of the composite layer 102 alone.

本実施の形態の断熱材は、シリカエアロゲル粒子の粉落ちを防止し、かつ、断熱性能も落とさず、モバイル機器等の断熱用途にも適用出来る。   The heat insulating material of the present embodiment prevents the powder of the silica airgel particles from falling off and does not lower the heat insulating performance, and can be applied to heat insulating applications such as mobile devices.

１０１ 断熱材
１０２ 複合層
１０３ シリカエアロゲル層
１０４ ラミネートフィルム
１０５ シリカエアロゲル
１０６ 不織布
１１０ 断熱材
１１１ コーティング膜
１１２ 水溶性樹脂
１１３ 親油性樹脂
DESCRIPTION OF SYMBOLS 101 Heat insulation material 102 Composite layer 103 Silica airgel layer 104 Laminated film 105 Silica airgel 106 Non-woven fabric 110 Heat insulation material 111 Coating film 112 Water-soluble resin 113 Lipophilic resin

Claims (10)

不織布にシリカエアロゲルを内包した複合層と、
親水性樹脂と親油性樹脂とを含み、前記複合層の表面を被覆するコーティング膜と、を有する断熱材。 Composite layer containing silica airgel in nonwoven fabric,
A heat insulating material comprising a hydrophilic resin and a lipophilic resin, and a coating film covering the surface of the composite layer. 前記コーティング膜に、前記不織布が位置する請求項１記載の断熱材。 The heat insulating material according to claim 1, wherein the non-woven fabric is located on the coating film. 前記親水性樹脂中に前記親油性樹脂が複数の島状で存在する請求項１または２記載の断熱材。 The heat insulating material according to claim 1 or 2, wherein the lipophilic resin is present in the form of a plurality of islands in the hydrophilic resin. 前記島状の親油性樹脂に親油性の前記不織布が位置する請求項３記載の断熱材。 The heat insulating material according to claim 3, wherein the non-woven fabric having lipophilicity is located on the island-like lipophilic resin. 前記親水性樹脂は、水溶性塗料ベースの樹脂である請求項１〜４のいずれか１項に記載の断熱材。 The heat insulating material according to any one of claims 1 to 4, wherein the hydrophilic resin is a water-soluble paint-based resin. 前記親油性樹脂は、熱硬化性樹脂である請求項１〜５のいずれか１項に記載の断熱材。 The heat insulating material according to any one of claims 1 to 5, wherein the lipophilic resin is a thermosetting resin. 前記親水性樹脂は、水溶性ポリエステル樹脂であり、
前記親油性樹脂は、エポキシ樹脂である請求項１〜６のいずれか１項に記載の断熱材。 The hydrophilic resin is a water-soluble polyester resin,
The heat insulating material according to any one of claims 1 to 6, wherein the lipophilic resin is an epoxy resin. 前記コーティング膜の厚みは、１〜１００μｍである請求項１〜７のいずれか１項に記載の断熱材。 The thickness of the said coating film is 1-100 micrometers, The heat insulating material of any one of Claims 1-7. 前記複数の島状の径は、０．１〜５０μである請求項３〜８のいずれか１項に記載の断熱材。 The heat insulating material according to any one of claims 3 to 8, wherein the diameter of the plurality of islands is 0.1 to 50μ. 前記親油性樹脂は、前記コーティング膜中に５〜５０％重量％である請求項１〜９のいずれか１項に記載の断熱材。
The heat insulating material according to any one of claims 1 to 9, wherein the lipophilic resin is 5 to 50% by weight in the coating film.
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