JP3221740U - Vacuum insulation - Google Patents
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- JP3221740U JP3221740U JP2019001238U JP2019001238U JP3221740U JP 3221740 U JP3221740 U JP 3221740U JP 2019001238 U JP2019001238 U JP 2019001238U JP 2019001238 U JP2019001238 U JP 2019001238U JP 3221740 U JP3221740 U JP 3221740U
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- 238000009413 insulation Methods 0.000 title abstract description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 88
- 239000011810 insulating material Substances 0.000 claims abstract description 62
- 230000004888 barrier function Effects 0.000 claims abstract description 53
- 239000000843 powder Substances 0.000 claims abstract description 28
- 239000011162 core material Substances 0.000 claims abstract description 27
- 229910021485 fumed silica Inorganic materials 0.000 claims abstract description 26
- 239000000565 sealant Substances 0.000 claims abstract description 23
- 238000007740 vapor deposition Methods 0.000 claims description 22
- 239000011888 foil Substances 0.000 claims description 10
- 229910044991 metal oxide Inorganic materials 0.000 claims description 10
- 150000004706 metal oxides Chemical class 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 239000012774 insulation material Substances 0.000 claims description 5
- 239000010410 layer Substances 0.000 description 80
- 239000000835 fiber Substances 0.000 description 49
- 239000007789 gas Substances 0.000 description 31
- 239000000377 silicon dioxide Substances 0.000 description 28
- 239000011230 binding agent Substances 0.000 description 25
- 239000000463 material Substances 0.000 description 22
- 230000005855 radiation Effects 0.000 description 18
- 239000002245 particle Substances 0.000 description 15
- 230000001629 suppression Effects 0.000 description 15
- 238000009826 distribution Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 239000011241 protective layer Substances 0.000 description 9
- 239000000758 substrate Substances 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 230000001186 cumulative effect Effects 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000012790 adhesive layer Substances 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000003365 glass fiber Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 229910002012 Aerosil® Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 238000009820 dry lamination Methods 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000012784 inorganic fiber Substances 0.000 description 3
- 239000011490 mineral wool Substances 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 229910002018 Aerosil® 300 Inorganic materials 0.000 description 2
- 238000004438 BET method Methods 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 229920002292 Nylon 6 Polymers 0.000 description 2
- 229920002302 Nylon 6,6 Polymers 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 description 1
- 229910002016 Aerosil® 200 Inorganic materials 0.000 description 1
- 229920002799 BoPET Polymers 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000003522 acrylic cement Substances 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000010574 gas phase reaction Methods 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 229920001179 medium density polyethylene Polymers 0.000 description 1
- 239000004701 medium-density polyethylene Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000790 scattering method Methods 0.000 description 1
- 239000005049 silicon tetrachloride Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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- Thermal Insulation (AREA)
Abstract
【課題】断熱性能に優れ、かつ薄型で軽量な真空断熱材を提供する。【解決手段】粉体を含む芯材の成形体１０が外袋１２内に減圧封入された真空断熱材であって、外袋は、シーラント層と、２層以上のバリア層とを備えるガスバリアフィルムを含み、ガスバリアフィルムの厚みは４０〜６５μｍであり、粉体は、ヒュームドシリカを含む。ガスバリアフィルムの厚みに対するシーラント層の厚みの割合が４０〜７５％である真空断熱材はさらに高機能である。【選択図】図１An object of the present invention is to provide a thin and lightweight vacuum heat insulating material which is excellent in heat insulation performance. A gas barrier film is a vacuum heat insulating material in which a molded body 10 of a core material containing powder is sealed under reduced pressure in an outer bag 12, the outer bag comprising a sealant layer and two or more barrier layers And the thickness of the gas barrier film is 40 to 65 μm, and the powder contains fumed silica. The vacuum heat insulating material in which the ratio of the thickness of the sealant layer to the thickness of the gas barrier film is 40 to 75% is more highly functional. [Selected figure] Figure 1
Description
本考案は、真空断熱材に関する。 The present invention relates to a vacuum insulation material.
真空断熱材は、冷蔵庫、給湯器等の様々な分野で使用されている。真空断熱材としては、粉体を含む芯材が成形された成形体が外袋内に減圧封入された真空断熱材が知られている（特許文献１）。芯材に粉体を用いた真空断熱材は、芯材にガラス繊維等の繊維を用いた真空断熱材に比べ、初期の断熱性能が劣るものの、低真空でも充分な断熱性能を維持できるため長期耐久性に優れる。 Vacuum insulators are used in various fields such as refrigerators and water heaters. As a vacuum heat insulating material, there is known a vacuum heat insulating material in which a compact obtained by molding a core material containing powder is sealed in an outer bag under reduced pressure (Patent Document 1). The vacuum insulation material using powder for the core material is inferior to the thermal insulation material using the fiber such as glass fiber for the core material at the initial stage, but it can maintain sufficient thermal insulation performance even at low vacuum, so long term Excellent in durability.
真空断熱材においては、特許文献１のような従来の真空断熱材に比べて薄く、さらに軽量化することが重要である。真空断熱材を薄くすることで、真空断熱材を曲げる等の加工性も向上する。
In the vacuum heat insulating material, it is important to make it thinner and lighter than the conventional vacuum heat insulating material as disclosed in
本考案は、断熱性能に優れ、かつ薄型で軽量な真空断熱材を提供することを目的とする。 An object of the present invention is to provide a thin and lightweight vacuum heat insulating material which is excellent in heat insulation performance.
本考案は、以下の構成を有する。
［１］粉体を含む芯材の成形体が外袋内に減圧封入された真空断熱材であって、
前記外袋は、シーラント層と、２層以上のバリア層とを備えるガスバリアフィルムを含み、
前記ガスバリアフィルムの厚みが４０〜６５μｍであり、
前記粉体は、ヒュームドシリカを含む、真空断熱材。
［２］前記ガスバリアフィルムの厚みに対する前記シーラント層の厚みの割合が４０〜７５％である、［１］に記載の真空断熱材。
［３］前記の２層以上のバリア層が、アルミニウム蒸着層、アルミニウム箔層、及び金属酸化物蒸着層からなる群から選ばれる層を含む、［１］又は［２］に記載の真空断熱材。
［４］前記真空断熱材の総厚みが４ｍｍ以下である、［１］〜［３］のいずれかに記載の真空断熱材。
The present invention has the following configuration.
[1] A vacuum heat insulating material in which a compact of a core material containing powder is sealed under reduced pressure in an outer bag,
The outer bag comprises a gas barrier film comprising a sealant layer and two or more barrier layers,
The thickness of the gas barrier film is 40 to 65 μm,
The powder comprises fumed silica, a vacuum insulation material.
[2] The vacuum heat insulating material according to [1], wherein the ratio of the thickness of the sealant layer to the thickness of the gas barrier film is 40 to 75%.
[3] The vacuum heat insulating material according to [1] or [2], wherein the two or more barrier layers include a layer selected from the group consisting of an aluminum vapor deposition layer, an aluminum foil layer, and a metal oxide vapor deposition layer .
[4] The vacuum heat insulating material according to any one of [1] to [3], wherein the total thickness of the vacuum heat insulating material is 4 mm or less.
本考案によれば、断熱性能に優れ、かつ薄型で軽量な真空断熱材を提供できる。さらに、本考案による真空断熱材は薄型であるため曲げ加工性に優れ、例えば施工面が曲面形状等である場合にも適用可能となる。 According to the present invention, it is possible to provide a thin and lightweight vacuum heat insulating material which is excellent in heat insulation performance. Furthermore, since the vacuum heat insulating material according to the present invention is thin, it is excellent in bending workability, and can be applied to, for example, a case where the construction surface has a curved shape or the like.
以下の用語は、以下の意味を示す。
「芯材」とは、真空断熱材における成形体を形成する材料であって、成形によって所望の形とされるものを意味する。
「バインダ付きヒュームドシリカ」とは、多孔質シリカ、繊維等の他の成分と混合する前のヒュームドシリカの表面に予めバインダが付与されたものを意味する。
「ヒュームドシリカ」とは、アモルファスかつ球状で、細孔のない一次粒子からなるシリカ微粒子を意味する。ヒュームドシリカは、例えば、四塩化ケイ素を気化し、高温の水素炎中で気相反応を行う方法により得られる。
「輻射抑制材」とは、赤外光を反射（散乱）するか、又は赤外光を一旦吸収してその吸収による温度上昇分を再放射する際に等方的に放射して赤外光の方向性を乱すことで、輻射伝熱を抑える粒子を意味する。
「繊維長Ｄ３０」とは、個数基準で求めた繊維長分布の全個数を１００％とした累積個数分布曲線において、累積個数が３０％となる点の繊維長を意味する。また、「繊維長Ｄ９０」とは、個数基準で求めた繊維長分布の全個数を１００％とした累積個数分布曲線において、累積個数が９０％となる点の繊維長を意味する。繊維長分布は、光学顕微鏡で観察した写真において無作為に５０本以上の繊維の長さを測定して得られる頻度分布及び累積個数分布曲線で求められる。
The following terms have the following meanings:
The "core material" is a material for forming a compact in a vacuum heat insulating material, and means a material which is formed into a desired shape.
The "bindered fumed silica" means that the surface of the fumed silica is previously provided with a binder prior to mixing with other components such as porous silica and fibers.
The term "fumed silica" means silica fine particles consisting of primary particles which are amorphous, spherical and have no pores. Fumed silica is obtained, for example, by vaporizing silicon tetrachloride and carrying out a gas phase reaction in a high temperature hydrogen flame.
The “radiation suppression material” refers to infrared light that reflects (scatters) infrared light, or absorbs infrared light once and re-radiates the temperature rise due to the absorption to emit isotropic light. By disturbing the directionality of the particles, it means particles that suppress the radiation heat transfer.
"Fiber length D30" means a fiber length at a point where the cumulative number becomes 30% in the cumulative number distribution curve in which the total number of fiber length distributions obtained on a number basis is 100%. Further, "fiber length D90" means a fiber length at a point where the cumulative number becomes 90% in the cumulative number distribution curve in which the total number of fiber length distributions obtained on the number basis is 100%. The fiber length distribution is determined from a frequency distribution and a cumulative number distribution curve obtained by randomly measuring the lengths of 50 or more fibers in a photograph observed with an optical microscope.
以下、本考案の真空断熱材の一例を示して説明する。
図１に示すように、本実施形態の真空断熱材１は、粉体を含む芯材の成形体１０と、外袋１２とを有する。真空断熱材１では、成形体１０が外袋１２内に減圧封入されている。
Hereinafter, an example of the vacuum heat insulating material of this invention is shown and demonstrated.
As shown in FIG. 1, the vacuum
芯材は、粉体を含む。芯材は、粉体に加えて、バインダ及び繊維のいずれか一方又は両方を含んでいてもよい。 The core material contains powder. The core material may contain, in addition to the powder, either or both of a binder and fibers.
粉体は、ヒュームドシリカを含む。ヒュームドシリカを含むことで、高い断熱性が得られる。粉体は、必要に応じて、ヒュームドシリカ以外の他の粉体として多孔質シリカ及び輻射抑制材のいずれか一方又は両方を含んでいてもよい。粉体は、ヒュームドシリカのみであってもよい。また、ヒュームドシリカと併用する他の粉体は、１種のみでもよく、２種以上でもよい。 The powder comprises fumed silica. By containing fumed silica, high thermal insulation can be obtained. The powder may optionally contain porous silica and / or a radiation inhibitor as powder other than fumed silica. The powder may be only fumed silica. In addition, the other powder used in combination with fumed silica may be one type alone, or two or more types.
ヒュームドシリカは極めて微細な粉末であるため、粒の大きさを表す指標としては通常比表面積が用いられる。
ヒュームドシリカの比表面積は、５０〜４００ｍ２／ｇが好ましく、１００〜３５０ｍ２／ｇがより好ましく、２００〜３００ｍ２／ｇが特に好ましい。ヒュームドシリカの比表面積が前記範囲の下限値以上であれば、断熱性能に優れる。ヒュームドシリカの比表面積が前記範囲の上限値以下であれば、粒子の表面にバインダを付けやすい。
比表面積は、窒素吸着法（ＢＥＴ法）により測定される。
Since fumed silica is a very fine powder, a specific surface area is usually used as an index for expressing the particle size.
The specific surface area of the fumed silica is preferably 50 to 400 m 2 / g, more preferably 100~350m 2 / g, 200~300m 2 / g is particularly preferred. If the specific surface area of fumed silica is equal to or more than the lower limit value of the above range, the heat insulation performance is excellent. If the specific surface area of fumed silica is not more than the upper limit value of the above range, it is easy to attach a binder to the surface of particles.
The specific surface area is measured by a nitrogen adsorption method (BET method).
ヒュームドシリカの具体例としては、例えば、アエロジル２００（比表面積２００ｍ２／ｇ、日本アエロジル社製）、アエロジル３００（比表面積３００ｍ２／ｇ、日本アエロジル社製）、ＣＡＢ−Ｏ−ＳＩＬ Ｍ−５（比表面積２００ｍ２／ｇ、キャボットジャパン社製）、ＣＡＢ−Ｏ−ＳＩＬ Ｈ−３００（比表面積３００ｍ２／ｇ、キャボットジャパン社製）、レオロシールＱＳ３０（比表面積３００ｍ２／ｇ、トクヤマ社製）を例示できる。
芯材に含まれるヒュームドシリカは、１種でもよく、２種以上でもよい。
Specific examples of fumed silica include, for example, Aerosil 200 (specific surface area 200 m 2 / g, manufactured by Nippon Aerosil Co., Ltd.), Aerosil 300 (specific surface area 300 m 2 / g, manufactured by Nippon Aerosil Co., Ltd.), CAB-O-SIL M- 5 (specific surface area: 200 m 2 / g, made by Cabot Japan Ltd.), CAB-O-SIL H-300 (specific surface area: 300 m 2 / g, made by Cabot Japan Ltd.), Leorosil QS30 (specific surface area: 300 m 2 / g, made by Tokuyama Co., Ltd.) Can be illustrated.
The fumed silica contained in the core material may be one kind or two or more kinds.
粉体中のヒュームドシリカの割合は、粉体の総質量に対して、７０〜１００質量％が好ましく、８０〜１００質量％がより好ましく、９０〜１００質量％が特に好ましい。ヒュームドシリカの割合が前記範囲の下限値以上であれば、強度の高い真空断熱材が得られやすい。 70-100 mass% is preferable with respect to the total mass of powder, as for the ratio of fumed silica in powder, 80-100 mass% is more preferable, and 90-100 mass% is especially preferable. If the proportion of fumed silica is equal to or higher than the lower limit value of the above range, a vacuum heat insulating material having high strength is easily obtained.
多孔質シリカの比表面積は、１００〜８００ｍ２／ｇが好ましく、２００〜７５０ｍ２／ｇがより好ましく、３００〜７００ｍ２／ｇが特に好ましい。多孔質シリカの比表面積が前記範囲の下限値以上であれば、断熱性能に優れる。多孔質シリカの比表面積が前記範囲の上限値以下であれば、多孔質シリカに吸収されるバインダ量を少なくできる。そのため、添加するバインダ量が少なくてもより低い圧力で成形体を成形できる。その結果、成形体の密度を低くでき、断熱性能が向上する。 100-800 m < 2 > / g is preferable, as for the specific surface area of porous silica, 200-750 m < 2 > / g is more preferable, and 300-700 m < 2 > / g is especially preferable. If the specific surface area of porous silica is more than the lower limit value of the said range, it is excellent in heat insulation performance. If the specific surface area of the porous silica is equal to or less than the upper limit value of the above range, the amount of binder absorbed by the porous silica can be reduced. Therefore, even if the amount of the binder to be added is small, the formed body can be formed at a lower pressure. As a result, the density of the molded body can be lowered and the heat insulation performance is improved.
多孔質シリカの気孔率は、６０〜９０％が好ましく、６５〜８５％がより好ましく、７０〜８０％が特に好ましい。多孔質シリカの気孔率が前記範囲の下限値以上であれば、固体の熱伝導を少なくできるため、断熱性能に優れる。多孔質シリカの気孔率が前記範囲の上限値以下であれば、成形時に多孔質シリカ粒子がつぶれにくく、多孔性が維持されるため、断熱性能に優れる。
気孔率は、窒素吸着法（ＢＥＴ法）により測定される。
60 to 90% is preferable, as for the porosity of porous silica, 65 to 85% is more preferable, and 70 to 80% is especially preferable. If the porosity of porous silica is more than the lower limit value of the said range, since the heat conduction of solid can be decreased, it is excellent in heat insulation performance. If the porosity of the porous silica is less than or equal to the upper limit value of the above range, the porous silica particles are unlikely to be crushed during molding, and the porosity is maintained, so that the heat insulating performance is excellent.
The porosity is measured by a nitrogen adsorption method (BET method).
多孔質シリカの平均粒子径は、１〜３００μｍが好ましく、２〜１５０μｍがより好ましく、３〜１００μｍが特に好ましい。多孔質シリカの平均粒子径が前記範囲の下限値以上であれば、高い気孔率を有する多孔質シリカが得られやすく、断熱性能に優れる。多孔質シリカの平均粒子径が前記範囲の上限値以下であれば、成形体の密度が高くなりすぎず、断熱性能に優れる。
平均粒子径は、レーザー回折散乱法やコールターカウンター法などにより、体積基準で測定される。
1-300 micrometers is preferable, as for the average particle diameter of porous silica, 2-150 micrometers is more preferable, and 3-100 micrometers is especially preferable. If the average particle diameter of the porous silica is at least the lower limit value of the above range, porous silica having a high porosity is easily obtained, and the heat insulating performance is excellent. When the average particle diameter of the porous silica is equal to or less than the upper limit value of the above range, the density of the molded body is not too high, and the heat insulation performance is excellent.
The average particle size is measured on a volume basis by a laser diffraction scattering method or Coulter counter method.
多孔質シリカの具体例としては、例えば、Ｍ．Ｓ．ＧＥＬやサンスフェア（いずれもＡＧＣエスアイテック社製）を例示できる。芯材に含まれる多孔質シリカは、１種でもよく、２種以上でもよい。 Specific examples of porous silica include, for example, M.I. S. GEL and Sunsphere (both are manufactured by AGC S ITEC Co., Ltd.) can be exemplified. The porous silica contained in the core material may be one type, or two or more types.
粉体中の多孔質シリカの割合は、粉体の総質量に対して、３０質量％以下が好ましく、２〜２０質量％がより好ましく、５〜１０質量％がさらに好ましい。多孔質シリカの割合が前記範囲の下限値以上であれば、断熱性能に優れる。多孔質シリカの割合が前記範囲の上限値以下であれば、強度の高い真空断熱材が得られやすい。 The proportion of the porous silica in the powder is preferably 30% by mass or less, more preferably 2 to 20% by mass, and still more preferably 5 to 10% by mass, with respect to the total mass of the powder. If the ratio of porous silica is more than the lower limit value of the said range, it is excellent in heat insulation performance. If the ratio of porous silica is below the upper limit value of the said range, a vacuum heat insulating material with high intensity | strength will be easy to be obtained.
芯材に輻射抑制材が含まれると、赤外光が反射（散乱）されるか、又は赤外光が一旦吸収され、その吸収による温度上昇分を再放射する際に等方的に放射される。これにより、成形体を通過する赤外光の総量が減少するため、輻射伝熱が抑えられる。輻射抑制材同士の接触が少なくなり、固体伝熱パスが形成されにくくなる点から、輻射抑制材は芯材中に均一に分散されることが好ましい。 When the core material contains a radiation suppression material, infrared light is reflected (scattered) or infrared light is absorbed once, and isotropically emitted when reradiating a temperature rise due to the absorption. Ru. As a result, the total amount of infrared light passing through the molded body is reduced, thereby suppressing the radiation heat transfer. It is preferable that the radiation suppression material is uniformly dispersed in the core material in that the radiation suppression materials are less in contact with each other and the solid heat transfer path is less likely to be formed.
輻射抑制材としては、例えば、金属粒子（アルミニウム粒子、銀粒子、金粒子等）、無機粒子（グラファイト、カーボンブラック、炭化ケイ素、酸化チタン、酸化スズ、チタン酸カリウム等）を例示できる。芯材に含まれる輻射抑制材は、１種でもよく、２種以上でもよい。 Examples of the radiation suppression material include metal particles (aluminum particles, silver particles, gold particles, etc.) and inorganic particles (graphite, carbon black, silicon carbide, titanium oxide, tin oxide, potassium titanate, etc.). The radiation suppression material contained in the core material may be one kind or two or more kinds.
輻射抑制材の平均粒子径は、０．１〜１００μｍが好ましく、０．５〜５０μｍがより好ましく、１〜２０μｍが特に好ましい。輻射抑制材の平均粒子径が前記範囲の下限値以上であれば、成形体中に輻射抑制剤を均一に分散させやすく、断熱性能に優れる。輻射抑制材の平均粒子径が前記範囲の上限値以下であれば、成形体の強度が低くなりすぎず、成形体のハンドリングが容易になる。 0.1-100 micrometers is preferable, as for the average particle diameter of a radiation suppression material, 0.5-50 micrometers is more preferable, and 1-20 micrometers is especially preferable. If the average particle diameter of the radiation suppression material is equal to or more than the lower limit value of the above range, the radiation suppression agent is easily dispersed uniformly in the molded body, and the heat insulation performance is excellent. If the average particle diameter of the radiation suppression material is equal to or less than the upper limit value of the above range, the strength of the formed body is not too low, and the handling of the formed body becomes easy.
粉体中の輻射抑制材の割合は、粉体の総質量に対して、３０質量％以下が好ましく、５〜２５質量％がより好ましく、１０〜２０質量％がさらに好ましい。輻射抑制材の割合が前記範囲の下限値以上であれば、輻射抑制材の効果が得られやすい。輻射抑制材の割合が前記上限値以下であれば、輻射抑制材による固体伝熱の増大を抑制できるため、断熱性能に優れる。 30 mass% or less is preferable with respect to the total mass of powder, as for the ratio of the radiation suppression material in powder, 5-25 mass% is more preferable, and 10-20 mass% is more preferable. If the ratio of the radiation suppression material is at least the lower limit value of the above range, the effect of the radiation suppression material is easily obtained. If the ratio of the radiation suppression material is equal to or less than the upper limit value, an increase in solid heat transfer due to the radiation suppression material can be suppressed, so the heat insulation performance is excellent.
芯材にバインダが含まれることで、成形時の圧力が低くても、バインダによってヒュームドシリカ、又はヒュームドシリカと他の成分（多孔質シリカ、繊維等）が互いに接着され、充分な強度を有する成形体を備える真空断熱材となる。
バインダは、他の成分を混合する前に予めヒュームドシリカに付与してバインダ付きヒュームドシリカとすることが好ましい。これにより、バインダによる効果が充分に得られやすくなる。多孔質シリカにバインダを付与しても、バインダが多孔質シリカに吸収されてしまうためにバインダによる効果が得られにくい。
By containing the binder in the core material, even if the pressure at the time of molding is low, fumed silica or fumed silica and other components (porous silica, fibers, etc.) are adhered to each other by the binder, and sufficient strength is achieved. It becomes a vacuum heat insulating material provided with the molded object which it has.
The binder is preferably applied to fumed silica in advance before mixing with other components to obtain bindered fumed silica. As a result, the effect of the binder can be sufficiently obtained. Even when the porous silica is provided with a binder, the binder is absorbed by the porous silica, so that the effect of the binder is hardly obtained.
バインダは、有機バインダであってもよく、無機バインダであってもよい。なかでも、バインダとしては、熱伝導性が低く、断熱性能に優れる点から、無機バインダが好ましい。
無機バインダとしては、例えば、ケイ酸ナトリウム、リン酸アルミニウム、硫酸マグネシウム、塩化マグネシウムを例示できる。なかでも、断熱性に優れる点から、ケイ酸ナトリウムが特に好ましい。芯材に含まれるバインダは、１種でもよく、２種以上でもよい。
The binder may be an organic binder or an inorganic binder. Among them, as the binder, an inorganic binder is preferable from the viewpoint of low thermal conductivity and excellent thermal insulation performance.
Examples of the inorganic binder include sodium silicate, aluminum phosphate, magnesium sulfate and magnesium chloride. Among them, sodium silicate is particularly preferable in terms of excellent thermal insulation. The binder contained in the core material may be one type, or two or more types.
芯材中のバインダの割合は、粉体の総質量１００質量部に対して、０．１〜１５質量部が好ましく、０．５〜１０質量部がより好ましく、１〜２質量部がさらに好ましい。バインダの割合が前記範囲の下限値以上であれば、より低密度で充分な強度を有する成形体が得られるため、断熱性能に優れる。バインダの割合が前記範囲の上限値以下であれば、バインダによる固体伝熱の増大を抑制できるため、断熱性能の低下が抑制される。 The proportion of the binder in the core material is preferably 0.1 to 15 parts by mass, more preferably 0.5 to 10 parts by mass, and still more preferably 1 to 2 parts by mass with respect to 100 parts by mass of the total mass of the powder. . If the proportion of the binder is at least the lower limit value of the above range, a molded article having a lower density and sufficient strength can be obtained, so the heat insulation performance is excellent. If the proportion of the binder is equal to or less than the upper limit value of the range, an increase in solid heat transfer due to the binder can be suppressed, and a decrease in the heat insulation performance is suppressed.
芯材にバインダ付きヒュームドシリカを用いる場合、バインダ付与前のヒュームドシリカの質量ＭＡと多孔質シリカの質量ＭＢとの比（ＭＡ／ＭＢ）は、７０／３０〜１００／０が好ましく、８０／２０〜９８／２がより好ましく、９０／１０〜９５／５が特に好ましい。ＭＡ／ＭＢが前記範囲内であれば、より低密度で充分な強度を有する成形体が得られるため、断熱性能に優れる。 When using a binder with fumed silica core material, the ratio of the mass M B of the mass M A and the porous silica fumed silica before the binder imparting (M A / M B) is 70 / 30-100 / 0 Is preferable, 80/20 to 98/2 is more preferable, and 90/10 to 95/5 is particularly preferable. If M A / M B is in the above-mentioned range, a molded article having a lower density and sufficient strength can be obtained, so the heat insulation performance is excellent.
芯材に繊維が含まれると、高強度な芯材が得られやすい。
繊維としては、真空断熱材に通常使用される繊維が使用でき、例えば、樹脂繊維、無機繊維を例示できる。なかでも、真空下でガス成分の揮発が少なく、真空度の低下による断熱性能の低下を抑制しやすい点、及び耐熱性に優れる点から、無機繊維が好ましい。芯材に含まれる繊維は、１種でもよく、２種以上でもよい。
When the core material contains fibers, a high strength core material is easily obtained.
As a fiber, the fiber normally used for a vacuum heat insulating material can be used, for example, a resin fiber and an inorganic fiber can be illustrated. Among them, inorganic fibers are preferable in view of the low volatilization of gas components under vacuum, the ease of suppressing the decrease in heat insulation performance due to the decrease in degree of vacuum, and the point of being excellent in heat resistance. The fibers contained in the core material may be of one type or of two or more types.
無機繊維としては、例えば、アルミナ繊維、ムライト繊維、シリカ繊維、グラスウール、グラスファイバー、ロックウール、スラグウール、炭化ケイ素繊維、カーボン繊維、シリカ・アルミナ繊維、シリカ・アルミナ・マグネシア繊維、シリカ・アルミナ・ジルコニア繊維、シリカ・マグネシア・カルシア繊維を例示できる。なかでも、価格や安全性などの点から、グラスファイバー、ロックウール、シリカ・マグネシア・カルシア繊維が好ましい。 Examples of inorganic fibers include alumina fibers, mullite fibers, silica fibers, glass wool, glass fibers, rock wool, slag wool, silicon carbide fibers, carbon fibers, silica / alumina fibers, silica / alumina / magnesia fibers, silica / alumina / Zirconia fibers and silica-magnesia-calcia fibers can be exemplified. Among them, glass fiber, rock wool, silica-magnesia-calcia fiber is preferable in terms of cost and safety.
繊維の繊維長Ｄ３０は、１００μｍ以上が好ましく、２００μｍ以上がより好ましく、５００μｍ以上がさらに好ましい。繊維長Ｄ３０が前記下限値以上であれば、破断しにくい高強度な真空断熱材が得られやすい。
繊維の繊維長Ｄ９０は、２０ｍｍ以下が好ましく、１０ｍｍ以下がより好ましく、５ｍｍ以下がさらに好ましい。繊維長Ｄ９０が前記上限値以下であれば、繊維同士が絡まりにくいために粉体と均一に混合しやすく、繊維による効果が充分に得られやすい。
100 micrometers or more are preferable, 200 micrometers or more are more preferable, and 500 micrometers or more of fiber length D30 of a fiber are more preferable. If the fiber length D30 is equal to or more than the lower limit value, it is easy to obtain a high-strength vacuum heat insulating material which is not easily broken.
20 mm or less is preferable, 10 mm or less is more preferable, and 5 mm or less of the fiber length D90 of a fiber is more preferable. When the fiber length D90 is equal to or less than the upper limit value, the fibers are less likely to be entangled, so that it is easy to mix with the powder uniformly, and the effect by the fibers is easily obtained.
繊維径（直径）は、繊維による固体伝熱の増大を抑制できる点から、２０μｍ以下が好ましく、１５μｍ以下がより好ましく、１０μｍ以下がさらに好ましい。繊維径（直径）は、破断しにくい高強度な真空断熱材が得られやすい点から、１μｍ以上が好ましく、３μｍ以上がより好ましい。繊維径は、３〜１５μｍがより好ましい。 The fiber diameter (diameter) is preferably 20 μm or less, more preferably 15 μm or less, and still more preferably 10 μm or less from the viewpoint of suppressing the increase in solid heat transfer by the fiber. The fiber diameter (diameter) is preferably 1 μm or more, and more preferably 3 μm or more from the viewpoint that a high-strength vacuum heat-insulating material which is hard to break is easily obtained. The fiber diameter is more preferably 3 to 15 μm.
芯材中の繊維の割合は、粉体の総質量１００質量部に対して、２〜３０質量部が好ましく、４〜２０質量部がより好ましく、５〜１０質量部がさらに好ましい。繊維の割合が前記範囲の下限値以上であれば、破断しにくい高強度な真空断熱材が得られやすい。繊維の割合が前記範囲の上限値以下であれば、繊維による固体伝熱の増大を抑制できるため、断熱性能の低下を抑制しやすい。 The proportion of fibers in the core material is preferably 2 to 30 parts by mass, more preferably 4 to 20 parts by mass, and still more preferably 5 to 10 parts by mass with respect to 100 parts by mass of the total mass of the powder. If the proportion of fibers is at least the lower limit value of the above range, it is easy to obtain a high strength vacuum heat insulating material which is not easily broken. If the ratio of the fibers is equal to or less than the upper limit value of the above range, the increase in solid heat transfer by the fibers can be suppressed, so it is easy to suppress the decrease in the heat insulation performance.
成形体１０の密度は、０．１５〜０．３５ｇ／ｃｍ３が好ましく、０．１７〜０．２１ｇ／ｃｍ３がより好ましい。成形体１０の密度が前記範囲の下限値以上であれば、成形体のハンドリングが容易で、また減圧封入の際に成形体から粉体が飛散しにくい。成形体１０の密度が前記範囲の上限値以下であれば、安定して断熱性能に優れる。
The density of the
外袋１２の大きさ及び形状は、特に限定されず、目的とする真空断熱材１の大きさ及び形状に合わせて適宜決定すればよい。
外袋１２は、成形体１０を減圧封入可能なガスバリアフィルムを含んで構成される。
The size and shape of the
The
ガスバリアフィルムは、シーラント層と、２層以上のバリア層とを備える積層フィルムであり、気密性を有する。ガスバリアフィルムは、シーラント層及びバリア層以外の他の層を有してもよい。他の層としては、接着層、保護層を例示できる。 The gas barrier film is a laminated film including a sealant layer and two or more barrier layers, and has airtightness. The gas barrier film may have other layers besides the sealant layer and the barrier layer. An adhesive layer and a protective layer can be illustrated as another layer.
シーラント層は、ガスバリアフィルムの最内層として設けられる。
シーラント層を形成する材料は、特に限定されず、例えば、低密度ポリエチレン、中密度ポリエチレン、直鎖状低密度ポリエチレン（ＬＬＤＰＥ）、ポリプロピレン等のポリオレフィン樹脂を例示できる。シーラント層を形成する材料は、１種でもよく、２種以上でもよい。
シーラント層は、単層構成であってもよく、複層構成であってもよい。
The sealant layer is provided as the innermost layer of the gas barrier film.
The material for forming the sealant layer is not particularly limited, and examples thereof include polyolefin resins such as low density polyethylene, medium density polyethylene, linear low density polyethylene (LLDPE), and polypropylene. The material forming the sealant layer may be one type, or two or more types.
The sealant layer may have a single layer structure or a multilayer structure.
バリア層としては、アルミニウム蒸着層（以下、「Ａｌ蒸着層」と記す。）、アルミニウム箔層（以下、「Ａｌ箔層」と記す。）、及び金属酸化物蒸着層を例示できる。２層以上のバリア層は、入手性及び緻密性の点から、Ａｌ蒸着層、Ａｌ箔層、及び金属酸化物蒸着層からなる群から選ばれる層を含むことが好ましい。
ガスバリアフィルムにおけるバリア層の数は、２層以上であり、２〜６層が好ましく、２〜４層がより好ましい。
As a barrier layer, an aluminum vapor deposition layer (it is hereafter described as "Al vapor deposition layer"), an aluminum foil layer (it is hereafter described as "Al foil layer"), and a metal oxide vapor deposition layer can be illustrated. The two or more barrier layers preferably include a layer selected from the group consisting of an Al vapor deposition layer, an Al foil layer, and a metal oxide vapor deposition layer, from the viewpoint of availability and compactness.
The number of barrier layers in the gas barrier film is two or more, preferably 2 to 6 layers, and more preferably 2 to 4 layers.
金属酸化物蒸着層を形成する金属酸化物としては、アルミナ、シリカを例示できる。
Ａｌ蒸着層及び金属酸化物蒸着層は、アルミニウム又は金属酸化物を蒸着基材に蒸着することで形成できる。蒸着基材としては、ポリエチレンテレフタレート（ＰＥＴ）フィルム、エチレン−ビニルアルコール共重合体（ＥＶＯＨ）フィルム等の樹脂フィルムを使用できる。
As a metal oxide which forms a metal oxide vapor deposition layer, an alumina and a silica can be illustrated.
The Al deposited layer and the metal oxide deposited layer can be formed by depositing aluminum or a metal oxide on a deposited substrate. As a vapor deposition base material, resin films, such as a polyethylene terephthalate (PET) film and an ethylene-vinyl alcohol copolymer (EVOH) film, can be used.
接着層を形成する接着剤としては、ドライラミネートに適した接着剤が好ましい。接着剤としては、２液硬化型ポリウレタン系接着剤、アクリル系接着剤、エポキシ系接着剤を例示でき、２液硬化型ポリエステル系接着剤が好ましい。 As the adhesive for forming the adhesive layer, an adhesive suitable for dry lamination is preferable. Examples of the adhesive include a two-component curable polyurethane adhesive, an acrylic adhesive, and an epoxy adhesive, and a two-component curable polyester adhesive is preferable.
保護層は、最外層に設けられることが好ましい。なお、保護層は、バリア層とシーラント層の間に設けてもよく、バリア層とバリア層の間に設けてもよい。ガスバリアフィルムが保護層を有する場合、保護層は、１層でもよく、２層以上でもよい。 The protective layer is preferably provided on the outermost layer. The protective layer may be provided between the barrier layer and the sealant layer, or may be provided between the barrier layer and the barrier layer. When the gas barrier film has a protective layer, the protective layer may be a single layer or two or more layers.
保護層を形成する材料としては、ポリアミド樹脂（ナイロン６、ナイロン６６、ナイロン６６とナイロン６との共重合体）、ポリエステル樹脂（ＰＥＴ、ポリエチレンナフタレート等）を例示できる。
蒸着基材上にバリア層としてＡｌ蒸着層又は金属酸化物蒸着層を形成した場合、蒸着基材を保護層としてもよい。
Examples of materials for forming the protective layer include polyamide resins (nylon 6, nylon 66, copolymer of nylon 66 and nylon 6), and polyester resins (PET, polyethylene naphthalate, etc.).
When an Al vapor deposition layer or a metal oxide vapor deposition layer is formed as a barrier layer on a vapor deposition substrate, the vapor deposition substrate may be used as a protective layer.
ガスバリアフィルムの層構成としては、例えば、蒸着基材（保護層）、Ａｌ蒸着層、接着層、Ａｌ箔層、接着層、シーラント層がこの順に積層された構成（以下、「蒸着基材（保護層）／Ａｌ蒸着層／接着層／Ａｌ箔層／接着層／シーラント層」と記す。他の層構成も同様に示す。）、蒸着基材／Ａｌ蒸着層／接着層／蒸着基材／Ａｌ蒸着層／接着層／シーラント層を例示できる。 As a layer configuration of the gas barrier film, for example, a configuration in which a vapor deposition substrate (protective layer), an Al vapor deposition layer, an adhesive layer, an Al foil layer, an adhesive layer, and a sealant layer are laminated in this order (hereinafter, “vapor deposition substrate (protection Layer) / Al deposited layer / adhesion layer / Al foil layer / adhesion layer / sealant layer ". Other layer configurations are also shown in the same manner.), Deposited substrate / Al deposited layer / adhesive layer / deposited substrate / Al A vapor deposition layer / adhesion layer / sealant layer can be illustrated.
ガスバリアフィルムの厚みは、４０〜６５μｍであり、４５〜６５μｍが好ましく、４７〜６２μｍがより好ましい。ガスバリアフィルムの厚みが前記範囲の下限値以上であれば、フィルムの強度が優れる。ガスバリアフィルムの厚みが前記範囲の上限値以下であれば、真空断熱材を薄型軽量化できる。 The thickness of the gas barrier film is 40 to 65 μm, preferably 45 to 65 μm, and more preferably 47 to 62 μm. If the thickness of the gas barrier film is at least the lower limit value of the above range, the strength of the film is excellent. If the thickness of the gas barrier film is equal to or less than the upper limit value of the above range, the thickness and weight of the vacuum heat insulating material can be reduced.
ガスバリアフィルムの厚みに対するシーラント層の厚みの割合は、４０〜７５％が好ましく、４０〜７０％が好ましく、４０〜６５％がより好ましい。前記割合が前記範囲の下限値以上であれば、気密性に優れる。前記割合が前記範囲の上限値以下であれば、真空断熱材を薄型化できる。シーラント層を複層とする場合、複層のシーラント層の総厚みによって前記割合を算出する。
シーラント層の厚みは、２０〜４５μｍが好ましく、２５〜４０μｍがより好ましい。
40 to 75% is preferable, as for the ratio of the thickness of the sealant layer with respect to the thickness of a gas barrier film, 40 to 70% is preferable, and 40 to 65% is more preferable. If the said ratio is more than the lower limit of the said range, it is excellent in airtightness. If the said ratio is below the upper limit of the said range, a vacuum heat insulating material can be thinned. When the sealant layer is a multilayer, the ratio is calculated by the total thickness of the multilayer sealant layer.
20-45 micrometers is preferable and, as for the thickness of a sealant layer, 25-40 micrometers is more preferable.
各々のバリア層の厚みは、バリア層の種類に応じて設定すればよい。
Ａｌ箔層の厚みは、３〜１２μｍが好ましく、３〜１０μｍがより好ましい。
The thickness of each barrier layer may be set according to the type of barrier layer.
3-12 micrometers is preferable and, as for the thickness of Al foil layer, 3-10 micrometers is more preferable.
Ａｌ蒸着層の厚みは、５０〜３００ｎｍが好ましく、７５〜２５０ｎｍがより好ましい。
金属酸化物蒸着層の厚みは、５０〜３００ｎｍが好ましく、７５〜２５０ｎｍがより好ましい。
蒸着基材の厚みは、３〜２７μｍが好ましく、５〜２５μｍがより好ましい。
50-300 nm is preferable and, as for the thickness of Al vapor deposition layer, 75-250 nm is more preferable.
50-300 nm is preferable and, as for the thickness of a metal oxide vapor deposition layer, 75-250 nm is more preferable.
3-27 micrometers is preferable and, as for the thickness of a vapor deposition base material, 5-25 micrometers is more preferable.
接着層の厚みは、０．５〜５μｍが好ましく、１〜４μｍがより好ましい。
保護層の厚みは、３〜２７μｍが好ましく、５〜２５μｍがより好ましい。
0.5-5 micrometers is preferable and, as for the thickness of a contact bonding layer, 1-4 micrometers is more preferable.
3-27 micrometers is preferable and, as for the thickness of a protective layer, 5-25 micrometers is more preferable.
ガスバリアフィルムの製造方法は、特に限定されず、ドライラミネーション法、押出ラミネーション法等で各層を積層する方法を例示できる。 The manufacturing method of a gas barrier film is not specifically limited, A method of laminating | stacking each layer by the dry lamination method, the extrusion lamination method, etc. can be illustrated.
真空断熱材１における外袋１２内の真空度は、優れた断熱性能が得られ、また真空断熱材１の寿命が長くなる点から、１×１０３Ｐａ以下が好ましく、５×１０２Ｐａ以下がより好ましく、３×１０２Ｐａ以下がさらに好ましい。外袋１２内の真空度は、外袋内を減圧することが容易な点から、１Ｐａ以上が好ましく、１０Ｐａ以上がより好ましい。
The degree of vacuum in the
真空断熱材の総厚みは、４ｍｍ以下が好ましく、０．５〜３．８ｍｍが好ましく、０．７〜３．６ｍｍがより好ましい。ここで、総厚みとは、ガスバリアフィルム端部の耳折部（折り返し部）を含まない部分の厚みを指す。 4 mm or less is preferable, 0.5-3.8 mm is preferable, and, as for the total thickness of a vacuum heat insulating material, 0.7-3.6 mm is more preferable. Here, the total thickness refers to the thickness of a portion of the gas barrier film end portion not including the ear-folded portion (folded portion).
真空断熱材の製造方法は、特に限定されず、前記したガスバリアフィルムからなる外袋を用いる以外は、国際公開第２０１５／１８２７６８号に記載の真空断熱材の製造方法を採用できる。例えば、芯材を金型に投入し、加圧して成形することで成形体１０が得られる。また、成形体１０を外袋１２内に収納し、減圧条件下においてその外袋１２を密封した後、外袋１２の外部を大気圧条件に戻すことで真空断熱材１が得られる。
The manufacturing method of a vacuum heat insulating material is not specifically limited, The manufacturing method of the vacuum heat insulating material as described in international publication 2015/182768 can be employ | adopted except using the outer bag which consists of the above-mentioned gas barrier film. For example, the molded
従来の真空断熱材に用いられるガスバリアフィルムの厚みは１００μｍ程度であり、真空断熱材の薄型化及び軽量化に限界があった。これに対し、本考案の真空断熱材は、シーラント層と２層以上のバリア層とを備える厚みが４０〜６５μｍのガスバリアフィルムからなる外袋内に、粉体系の成形体が減圧封入されている。そのため、本考案の真空断熱材は、断熱性能を確保しつつ、薄型化でき、軽量である。さらに、薄型であるため曲げ加工性に優れる。 The thickness of the gas barrier film used for the conventional vacuum heat insulating material is about 100 micrometers, and there existed a limit in thickness reduction and weight reduction of a vacuum heat insulating material. On the other hand, in the vacuum heat insulating material of the present invention, a powder type molded body is sealed under reduced pressure in an outer bag made of a gas barrier film having a thickness of 40 to 65 μm including a sealant layer and two or more barrier layers. . Therefore, the vacuum heat insulating material of the present invention can be thinned and light while securing the heat insulating performance. Furthermore, since it is thin, it is excellent in bending workability.
なお、本考案の真空断熱材は、前記した真空断熱材１には限定されない。例えば、本考案の真空断熱材は、通気性を有する内袋内に成形体を収納した状態で外袋内に減圧封入した真空断熱材であってもよい。すなわち、芯材からなる成形体が内袋内に収納されたものを用いるものであってもよい。
In addition, the vacuum heat insulating material of this invention is not limited to the above-mentioned vacuum
内袋としては、通気性を有し、芯材を形成する粉体が減圧封入の際に漏れないようにできるものであればよく、例えば、紙材、不織布等からなる袋を例示できる。
内袋の大きさ及び形状は、特に限定されず、目的とする真空断熱材の大きさ及び形状に合わせて適宜決定すればよい。
内袋を使用する場合の真空断熱材の製造方法としては、成形体を内袋内に収納した状態で外袋内に減圧封入する以外は、前記真空断熱材１で説明した方法と同様の方法を採用できる。
The inner bag may be of any type as long as it has air permeability and can prevent the powder forming the core material from leaking at the time of reduced pressure sealing, and can be exemplified by a bag made of paper material, non-woven fabric or the like.
The size and shape of the inner bag are not particularly limited, and may be appropriately determined in accordance with the size and shape of the target vacuum heat insulating material.
The method of manufacturing the vacuum heat insulating material in the case of using the inner bag is the same method as the method described in the vacuum
以下、実施例によって本考案を具体的に説明するが、本考案は以下の記載によっては限定されない。例１〜４は実施例である。 Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited by the following description. Examples 1 to 4 are working examples.
［繊維長の測定］
原料として用いた繊維の繊維長Ｄ３０及びＤ９０は、光学顕微鏡で観察した写真において無作為に抽出した５０本以上の繊維の長さを測定し、その頻度分布及び累積個数分布曲線から個数基準で求めた繊維長分布から算出した。
[Measurement of fiber length]
The fiber lengths D30 and D90 of the fibers used as the raw material are obtained by measuring the lengths of 50 or more fibers randomly extracted in a photograph observed with an optical microscope, from the frequency distribution and the cumulative number distribution curve on a number basis It was calculated from the fiber length distribution.
［熱伝導率の測定］
各例で得られた真空断熱材の熱伝導率は、熱伝導率測定装置ＨＣ−１１０（英弘精機社製）を用いて測定した。
[Measurement of thermal conductivity]
The thermal conductivity of the vacuum heat insulating material obtained in each example was measured using a thermal conductivity measuring device HC-110 (manufactured by Eiko Seiki Co., Ltd.).
［製造例１］
接着剤として東洋モートン社製 ＴＭ−２５０ＨＶ／ＣＡＴ−ＲＴ８６Ｌ−６０を用いたドライラミネーション法により、Ａｌ蒸着ＰＥＴフィルム（厚み１２μｍ、商品名「ＶＭ−ＰＥＴ」、東レフィルム加工株式会社製、Ａｌ蒸着層：１００ｎｍ）、Ａｌ箔（厚み６μｍ、東洋アルミニウム株式会社製）、及びＬＬＤＰＥフィルム（厚み３０μｍ、商品名「ＨＣ」、三井化学東セロ株式会社製）をこの順に積層してガスバリアフィルムＦ−１を得た。ガスバリアフィルムＦ−１の層構成、ガスバリアフィルムの厚み、及びガスバリアフィルムの厚みに対するシーラント層の厚みの割合を表１に示す。
Production Example 1
Al-deposited PET film (
［製造例２］
層構成を表１に示すとおりに変更した以外は、製造例１と同様にしてガスバリアフィルムＦ−２を得た。
Production Example 2
A gas barrier film F-2 was obtained in the same manner as in Production Example 1 except that the layer configuration was changed as shown in Table 1.
［製造例３］
Ａｌ箔の代わりにＡｌ蒸着ＥＶＯＨフィルム（厚み１２μｍ、商品名「ＶＭ−ＸＬ」、クラレ株式会社製、Ａｌ蒸着層：１００ｎｍ）を用い、層構成を表１に示すとおりに変更した以外は、製造例１と同様にしてガスバリアフィルムＦ−３を得た。
[Production Example 3]
Manufacture except using Al-deposited EVOH film (
［実施例１］
ヒュームドシリカ（商品名「アエロジル３００」、比表面積３００ｍ２／ｇ、日本アエロジル株式会社製。以下、同じ。）の１００質量部、グラファイト（日本黒鉛工業株式会社製、平均粒子径：２０μｍ）の２０質量部、ガラス繊維（繊維径：７μｍ、繊維長Ｄ９０：３ｍｍ）の５質量部の混合物１２５ｇをプレス成形し、４００ｍｍ×４００ｍｍ×厚さ２ｍｍの平板状の芯材の成形体を作製した。
５００ｍｍ×５００ｍｍに切り出した２枚のガスバリアフィルムＦ−１をシーラント層が内側に対向するように重ね、周縁の３辺についてヒートシールを行い、三方シールの外袋を作製した。外袋内に成形体を入れ、ヒートシール機能付きの真空チャンバー内に設置した。次いで、チャンバー内を３０Ｐａまで減圧し、その状態で外袋の開口部をヒートシールして密封し、外袋の外部を大気圧条件に戻して総厚み２．１ｍｍの真空断熱材を得た。
Example 1
100 parts by mass of fumed silica (trade name "Aerosil 300", specific surface area 300 m 2 / g, manufactured by Nippon Aerosil Co., hereinafter the same), graphite (manufactured by Nippon Graphite Industry Co., Ltd., average particle diameter: 20 μm) A mixture of 25 parts by mass of 20 parts by mass and 5 parts by mass of glass fibers (fiber diameter: 7 μm, fiber length D: 3 mm) was press-formed to prepare a plate-shaped core of 400 mm × 400 mm × 2 mm in thickness.
Two gas barrier films F-1 cut out into 500 mm × 500 mm were stacked so that the sealant layer faced the inside, and heat sealing was performed on three sides of the peripheral edge to produce an outer bag of a three-way seal. The molded body was placed in the outer bag and placed in a vacuum chamber with a heat seal function. Next, the inside of the chamber was depressurized to 30 Pa, and the opening of the outer bag was heat sealed and sealed in that state, and the outside of the outer bag was returned to atmospheric pressure conditions to obtain a vacuum heat insulating material having a total thickness of 2.1 mm.
［実施例２］
成形体の厚みを３ｍｍにした以外は、実施例１と同様にして総厚み３．１ｍｍの真空断熱材を得た。
Example 2
A vacuum heat insulating material having a total thickness of 3.1 mm was obtained in the same manner as in Example 1 except that the thickness of the molded body was 3 mm.
［実施例３］
成形体の厚みを３ｍｍにし、ガスバリアフィルムＦ−１の代わりにガスバリアフィルムＦ−２を用いた以外は、実施例１と同様にして総厚み３．１ｍｍの真空断熱材を得た。
[Example 3]
A vacuum heat insulating material having a total thickness of 3.1 mm was obtained in the same manner as in Example 1 except that the thickness of the molded body was 3 mm and gas barrier film F-2 was used instead of gas barrier film F-1.
［実施例４］
成形体の厚みを３ｍｍにし、ガスバリアフィルムＦ−１の代わりにガスバリアフィルムＦ−３を用いた以外は、実施例１と同様にして総厚み３．２ｍｍの真空断熱材を得た。
Example 4
A vacuum heat insulating material having a total thickness of 3.2 mm was obtained in the same manner as in Example 1 except that the thickness of the molded body was 3 mm and gas barrier film F-3 was used instead of gas barrier film F-1.
各例で得た真空断熱材の評価結果を表２に示す。 The evaluation results of the vacuum heat insulating material obtained in each example are shown in Table 2.
表２に示すように、実施例１〜４の真空断熱材は、総厚みが４ｍｍ未満の薄型であるため簡単に曲げられ、さらに断熱性能に優れていた。 As shown in Table 2, since the vacuum heat insulating materials of Examples 1 to 4 were thin with a total thickness of less than 4 mm, they were easily bent and were further excellent in heat insulating performance.
１…真空断熱材、１０…成形体、１２…外袋。 1 ... vacuum heat insulating material, 10 ... molded body, 12 ... outer bag.
Claims (4)
前記外袋は、シーラント層と、２層以上のバリア層とを備えるガスバリアフィルムを含み、
前記ガスバリアフィルムの厚みが４０〜６５μｍであり、
前記粉体は、ヒュームドシリカを含む、真空断熱材。 It is a vacuum heat insulating material in which a compact of a core material containing powder is sealed under reduced pressure in an outer bag,
The outer bag comprises a gas barrier film comprising a sealant layer and two or more barrier layers,
The thickness of the gas barrier film is 40 to 65 μm,
The powder comprises fumed silica, a vacuum insulation material.
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| JP2022040091A (en) * | 2020-08-27 | 2022-03-10 | ファ－クー－テック アクチェンゲゼルシャフト | Temperature-stable vacuum insulation element |
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| WO2021059929A1 (en) * | 2019-09-26 | 2021-04-01 | Ａｇｃ株式会社 | Method for manufacturing heat-insulating member |
| JP2022040091A (en) * | 2020-08-27 | 2022-03-10 | ファ－クー－テック アクチェンゲゼルシャフト | Temperature-stable vacuum insulation element |
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