JP2014105829A - Vacuum heat insulation sheet - Google Patents

Vacuum heat insulation sheet Download PDF

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JP2014105829A
JP2014105829A JP2012260905A JP2012260905A JP2014105829A JP 2014105829 A JP2014105829 A JP 2014105829A JP 2012260905 A JP2012260905 A JP 2012260905A JP 2012260905 A JP2012260905 A JP 2012260905A JP 2014105829 A JP2014105829 A JP 2014105829A
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heat insulating
vacuum heat
vacuum
sheet
core material
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Masafumi Hanada
雅史 花田
Hiroshige Kono
博繁 河野
Ryoichi Fukuzawa
良一 福沢
Toshiyuki Murai
俊之 村井
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YAMANO KK
Okura Industrial Co Ltd
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YAMANO KK
Okura Industrial Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a vacuum heat insulation sheet that can be sufficiently manufactured even in a relatively simple vacuum facility, can be formed in an optional size and has flexibility, without needing a large vacuum facility.SOLUTION: A vacuum heat insulation sheet 10 is formed in a sheet form so that a heat insulation core material 21 is held between two gas cut-off films 22 having bendability; a plurality of vacuum heat insulation units 20, in which the periphery of the heat insulation core material 21 is crimped as an encapsulation platform 23 while a space where the heat insulation core material 21 is stored is made into a vacuum state, are two-dimensionally stuck to each other without any interval; and a sticking part of the encapsulation platform 23 has flexibility.

Description

本発明は、断熱材を真空状態に封入してなる真空断熱材により構成された真空断熱シートに関する。   The present invention relates to a vacuum heat insulating sheet constituted by a vacuum heat insulating material formed by sealing a heat insulating material in a vacuum state.

従来、住宅の断熱材としては、グラスウールやウレタン等の発泡樹脂ボードなどが用いられている。最近、これに替わり、発泡体や粉粒体、繊維体等を適宜平板状に押し固めたものをアルミニウム箔と合成樹脂フィルムを積層したガス遮断フィルムを重ね合わせた袋に入れ、これを封入する際に周囲を真空にすることで、断熱材が真空状態で封入されたシートが提供され、これを断熱材として用いることも行われている。この真空状態による熱伝導の遮断により、内部の断熱材の断熱効果も相まって、断熱材としての効果がより高くなっている。また、従来の断熱材に比べ薄く成型することが可能なので、冷蔵庫や自動販売機、熱交換器など、高い断熱性能と省スペース化を要求される機器の断熱材としても利用されている。   Conventionally, as a heat insulating material for a house, a foamed resin board such as glass wool or urethane has been used. Recently, instead of this, foam, powder, fiber, etc., pressed into a flat plate as appropriate, are put in a bag with a gas barrier film laminated with aluminum foil and synthetic resin film, and sealed. When the surroundings are evacuated, a sheet in which the heat insulating material is sealed in a vacuum state is provided, and this is also used as a heat insulating material. By blocking the heat conduction due to the vacuum state, the heat insulating effect of the internal heat insulating material is combined with the effect as a heat insulating material. In addition, since it can be molded thinner than conventional heat insulating materials, it is also used as a heat insulating material for devices that require high heat insulating performance and space saving, such as refrigerators, vending machines, and heat exchangers.

ところで、グラスウール等の従来からある断熱材は壁への施工の際、釘やステープル等により壁面のボード等に固定されるのが普通である。しかし、真空断熱材に釘等を打ち付けると空いた穴で内部が真空状態でなくなるため、真空による断熱効果は発揮されなくなるという問題点があった。
これに対して、特許文献1に示すような真空断熱シートの製造方法が開示されている。これは、断熱材を含む真空部分がシート上で「桟」状の「連結シール部」によって区画されているものであった。そして区画の1つに釘を打ち付けたとしても、真空状態が損なわれるのはその区画のみで、他の区画は「桟」によって隔てられているため真空状態が保たれ、シート全体としての断熱性はさほど損なわれないものであった。
By the way, a conventional heat insulating material such as glass wool is usually fixed to a wall board or the like by nails, staples or the like during construction on the wall. However, when a nail or the like is hit against the vacuum heat insulating material, the inside is not in a vacuum state due to the vacant hole, and there is a problem that the heat insulating effect by the vacuum is not exhibited.
On the other hand, the manufacturing method of a vacuum heat insulation sheet as shown to patent document 1 is disclosed. In this case, the vacuum part including the heat insulating material was partitioned on the sheet by the “connecting seal part” in the shape of a “crosspiece”. And even if nails are nailed to one of the compartments, the vacuum state is only impaired by that compartment, and the other compartments are separated by “crosspieces”, so that the vacuum state is maintained and the heat insulation of the entire sheet It was something that was not damaged so much.

また、特許文献2では、枠材で周囲を囲った面材の上に複数の真空断熱材を適当に配列した状態で、この上からもう1枚の面材を載せて挟み、真空断熱材の間の間隙は樹脂発泡剤で充填する、というものであった。
さらに、特許文献3では、ある程度の厚みのあるコア材を気密フィルムで真空密閉して、その際の圧着片をコア材の一方の面側に偏らせた真空断熱材を形成し、これらを複数個平面状に連結する際に、隣接する真空断熱材どうしで圧着片が互い違いになるようにして、コア材間の隙間がないようにして断熱パネルを構成する技術が開示されている。
Further, in Patent Document 2, a plurality of vacuum heat insulating materials are appropriately arranged on a face material surrounded by a frame material, and another surface material is placed between the vacuum heat insulating materials. The gap between them was filled with a resin foaming agent.
Furthermore, in Patent Document 3, a core material having a certain thickness is vacuum-sealed with an airtight film to form a vacuum heat insulating material in which a pressure-bonding piece at that time is biased to one surface side of the core material. A technique is disclosed in which a heat insulating panel is configured so that the pressure-bonding pieces are staggered between adjacent vacuum heat insulating materials when there is no gap between the core materials when connecting in the form of individual planes.

特開2012−149729号公報JP 2012-149729 A 特開2008−95423号公報JP 2008-95423 A 特開2004−278575号公報JP 2004-278575 A

上記特許文献1記載の真空断熱シートは、全体で一枚ものとして形成されている。住宅の壁面に適用し得る断熱材としてこれを形成する場合、少なくとも1辺がメートル単位の四角形状に形成される必要がある。これほどの大きさのシートを真空状態とするためには、巨大な真空設備を多大な費用をかけて準備する必要がある。また、あらかじめ複数に区画されたシート部分のその区画ごとに断熱材を載置し、これに同じく区画されたシートを重ね、各区画がずれないように正確に溶着するのは実際にはきわめて困難である。
また、上記特許文献2記載の断熱パネルは、複数の真空断熱材を平面状に配列した際の各々の間の間隙を樹脂発泡剤で充填する、という手順を要するため、製造工程が複雑であるとともに製造コストも嵩む。さらに、構成された断熱パネルは周囲が枠材で囲われており、可撓性に乏しいものである。よって、これを曲面に適用することは不可能である。
The vacuum heat insulating sheet described in Patent Document 1 is formed as a single sheet as a whole. When forming this as a heat insulating material applicable to the wall surface of a house, at least one side needs to be formed in the square shape of a meter unit. In order to make a sheet of such a size into a vacuum state, it is necessary to prepare a huge vacuum facility at great expense. In addition, it is actually very difficult to place a heat insulating material in each section of the sheet section divided into a plurality of sections in advance, and to stack the same section sheets on top of each other and to accurately weld the sections so that they do not shift. It is.
Moreover, since the heat insulation panel described in Patent Document 2 requires a procedure of filling a gap between each of the plurality of vacuum heat insulating materials in a planar shape with a resin foaming agent, the manufacturing process is complicated. At the same time, the manufacturing cost increases. Furthermore, the constructed heat insulating panel is surrounded by a frame material, and is not flexible. Therefore, it is impossible to apply this to a curved surface.

さらに、上記特許文献3の断熱パネルもまた、各真空断熱間を隙間がない状態で平面状に構成することは可能であるものの、各断熱材がある程度の厚みや剛性があるから、その厚みがある辺縁の平面どうしで接触することで隙間が解消できている。その結果、やはり可撓性に乏しくなっており、これも曲面に適用することは不可能である。
以上の問題点に鑑み、本発明は、上記のような巨大な真空設備を要することなく、比較的簡易な真空設備でも十分製造可能でかつメートル単位のような任意の大きさにも形成可能な真空断熱シートであって、平面のみならず曲面にも適用可能な可撓性をも備えたものを提供することを課題とする。
Furthermore, although the heat insulation panel of the above-mentioned Patent Document 3 can also be configured in a flat shape with no gap between the vacuum insulations, each insulation has a certain thickness and rigidity, so the thickness is The gap can be eliminated by contact between the planes of a certain edge. As a result, the flexibility is still poor, and this is also impossible to apply to curved surfaces.
In view of the above problems, the present invention does not require a huge vacuum facility as described above, can be sufficiently manufactured even with a relatively simple vacuum facility, and can be formed in an arbitrary size such as a metric unit. It is an object of the present invention to provide a vacuum heat insulating sheet having flexibility applicable not only to a flat surface but also to a curved surface.

上記課題に鑑み、本発明に係る真空断熱シート10は、断熱芯材21を2枚の屈曲性を有するガス遮断フィルム22の間に挟み、その断熱芯材21が収容される空間を真空にしつつその断熱芯材21の周囲を封入代23として熱圧着して形成した真空断熱単位20を複数個平面的に隙間なく貼り合わせて、前記封入代23による貼り合わせ部分が可撓性を有する1枚のシート状に成形したことを特徴とする。
断熱芯材21とは、従来既知の断熱材を平面状の芯材として固めて形成したものである。この従来既知の断熱材としては、たとえば、ウレタンフォーム、スチレンフォーム、フェノールフォーム等の合成樹脂の発泡体が挙げられる。また、これらの発泡体を粉砕したものや、シリカ、アルミナ、パーライトのような無機系の粉粒体も断熱材として使用可能である。さらに、グラスウール、ロックウール、グラスファイバー、セルロースファイバーのような繊維体も断熱材として使用可能である。これらはいずれも、平板状の適宜の形状に押し固めた状態で断熱芯材21として使用される。この適宜の形状とは、この形状を複数個、平面として敷き詰めることのできるようなものであれば特に限定はなく、たとえば、直角二等辺三角形、正方形、長方形、六角形などとすることができる。
In view of the above problems, the vacuum heat insulating sheet 10 according to the present invention sandwiches the heat insulating core material 21 between the two gas barrier films 22 having flexibility, and evacuates the space in which the heat insulating core material 21 is accommodated. A plurality of vacuum heat insulating units 20 formed by thermocompression bonding around the heat insulating core material 21 as a sealing allowance 23 are bonded together in a plane without gaps, and the bonded portion by the sealing allowance 23 is a single piece having flexibility. It is characterized by being formed into a sheet shape.
The heat insulating core material 21 is formed by solidifying a conventionally known heat insulating material as a flat core material. Examples of the conventionally known heat insulating material include foams of synthetic resins such as urethane foam, styrene foam, and phenol foam. In addition, those obtained by pulverizing these foams, and inorganic powders such as silica, alumina, and pearlite can be used as heat insulating materials. Furthermore, fiber bodies such as glass wool, rock wool, glass fiber, and cellulose fiber can be used as the heat insulating material. All of these are used as the heat insulating core material 21 in a state of being pressed into an appropriate flat plate shape. The appropriate shape is not particularly limited as long as a plurality of the shapes can be laid down as a plane, and can be, for example, a right-angled isosceles triangle, a square, a rectangle, or a hexagon.

ガス遮断フィルム22とは、ガスバリア性を備えたフィルム材をいい、たとえば、ポリエステルフィルムやポリアミドフィルムなど保護層とアルミニウム箔や蒸着フィルムなどのバリア層と、ポリエチレンフィルムやポリプロピレンフィルムなどのシーラント層とが積層された複合フィルムとして形成することができる。また、このガス遮断フィルム22は、多少の折り曲げによっては破断は起こさず、それによってガスバリア性が阻害されない程度の屈曲性を有するものである。このガス遮断フィルム22を2枚合わせにした間に、上記の形状に成形された断熱芯材21が封入されることになる。すなわち、真空雰囲気中で2枚のガス遮断フィルム22の間に断熱芯材21を挟み込み、その周囲を熱圧着すれば、断熱芯材21は真空状態でガス遮断フィルム22間に封入され、これが「真空断熱単位20」となる。そしてこの熱圧着された各辺縁が「封入代23」となる。   The gas barrier film 22 refers to a film material having a gas barrier property. For example, a protective layer such as a polyester film or a polyamide film, a barrier layer such as an aluminum foil or a vapor-deposited film, and a sealant layer such as a polyethylene film or a polypropylene film. It can be formed as a laminated composite film. Further, the gas barrier film 22 does not break when it is slightly bent, and has such a flexibility that the gas barrier property is not hindered. While the two gas barrier films 22 are put together, the heat insulating core material 21 formed in the above shape is enclosed. That is, if a heat insulating core material 21 is sandwiched between two gas barrier films 22 in a vacuum atmosphere and the periphery is thermocompression bonded, the heat insulating core material 21 is sealed between the gas barrier films 22 in a vacuum state. Vacuum insulation unit 20 ". Each thermocompression-bonded edge becomes “enclosure 23”.

そして各真空断熱単位20は、隙間なく平面的に貼り合わせられることで、一枚の任意の大きさの真空断熱シート10として形成されることになる。
この貼り合わせの際には、隣接する真空断熱単位20の封入代23どうしを溶着してキルティング状にしてもよいが、隣接する真空断熱単位20においては、一方の封入代23が他方の前記断熱芯材21を有する部分に重ね合わせられていることが望ましい。あるいは、隣接する前記真空断熱単位20においては、前記断熱芯材21を有する部分が互いに重ね合わせられていることが望ましい。このように重ね合わせられることで、断熱芯材21が途切れる部分が解消され、断熱芯材21のある部分とない部分との断熱性の格差が解消されることになる。
And each vacuum heat insulation unit 20 is formed as one vacuum insulation sheet 10 of arbitrary magnitude | sizes by bonding together planarly without a gap.
At the time of bonding, the sealing allowances 23 of the adjacent vacuum heat insulating units 20 may be welded together to form a quilting shape. It is desirable to be superimposed on the portion having the core material 21. Alternatively, in the adjacent vacuum heat insulating units 20, it is desirable that the portions having the heat insulating core material 21 are overlapped with each other. By overlapping in this way, the portion where the heat insulating core material 21 is interrupted is eliminated, and the thermal insulation disparity between the portion with and without the heat insulating core material 21 is eliminated.

そして、真空後の断熱芯材21部分は可撓性ではないものの、ガス遮断フィルム22が可撓性を有することで、前記封入代23によって貼り合わせられている部分がある程度の可撓性を有することとなる。その結果、真空断熱シート10が全体として可撓性を有し、その貼り合わせの箇所で曲げることが可能となっている。よって、平面のみならず、曲面にも適用することが可能である。
なお、前記真空断熱単位20を平面的な支持体30に隙間なく貼り合わせて前記1枚の真空断熱シート10として成形することもできる。この支持体30とは、たとえば、合板、石膏ボード、紙、布、合成樹脂シート等、平面的な構造物であれば何でも使用可能である。この際、支持体30として紙、布あるいは合成樹脂シートのような可撓性のものを採用する場合、真空断熱単位20を貼り合わせたあとでも支持体30を含めた可撓性が維持されることとなっている。
And although the heat insulating core material 21 part after vacuum is not flexible, the gas barrier film 22 has flexibility, so that the part bonded by the sealing allowance 23 has some flexibility. It will be. As a result, the vacuum heat insulating sheet 10 has flexibility as a whole, and can be bent at the bonding position. Therefore, it can be applied not only to a plane but also to a curved surface.
Note that the vacuum heat insulating unit 20 may be bonded to the flat support 30 without any gap to form the single vacuum heat insulating sheet 10. Any material can be used as the support 30 as long as it is a planar structure such as plywood, gypsum board, paper, cloth, and synthetic resin sheet. At this time, when a flexible material such as paper, cloth, or a synthetic resin sheet is used as the support 30, the flexibility including the support 30 is maintained even after the vacuum heat insulating unit 20 is bonded. It is supposed to be.

また、前記1枚のシート状に成形したその全体を収縮性フィルム24で被覆し収縮させ前記ガス遮断フィルム22と密着させることとすれば、隣り合う断熱芯材21どうしの間隔をより小さくすることができ、これにより断熱性もより向上することとなる。この際、収縮性フィルム24自体は可撓性を有するので、これで全体を被覆することとしても真空断熱シート10全体としての可撓性を阻害することはない。   Further, if the whole sheet formed into a single sheet is covered with a shrinkable film 24 and contracted to be in close contact with the gas barrier film 22, the distance between adjacent heat insulating cores 21 can be made smaller. As a result, the heat insulation is further improved. At this time, since the shrinkable film 24 itself has flexibility, even if the whole is covered with this, the flexibility of the vacuum heat insulating sheet 10 as a whole is not hindered.

本発明は、上記のように構成されているので、それほど大きな真空設備を要することなく、比較的簡易な真空設備でも十分製造可能でかつメートル単位の大きさにも形成可能な真空断熱シートを提供することが可能となる。また、該真空断熱シートにおける各部分の断熱性の格差も解消することが可能となる。さらに、平面のみならず曲面にも適用可能な可撓性をも備えることとなる。
特に、真空断熱シートの施工の際に一部に釘を打ったとしても、その部分の真空断熱単位が断熱製を失うのみで、シート全体としての断熱機能は失われることはない。
さらに、比較的小さな真空断熱単位を複数連結したものであるため、真空断熱シートとしての大きさや形を任意のものに自由に形成することができる。
Since the present invention is configured as described above, it provides a vacuum heat insulating sheet that can be sufficiently manufactured even with a relatively simple vacuum equipment and can be formed in the size of a meter without requiring a large vacuum equipment. It becomes possible to do. Moreover, it becomes possible to eliminate the difference in the heat insulating properties of each part in the vacuum heat insulating sheet. Furthermore, it is provided with flexibility applicable not only to a flat surface but also to a curved surface.
In particular, even if nails are struck in part during the construction of the vacuum heat insulating sheet, the heat insulating function of the entire sheet is not lost, only that the vacuum heat insulating unit in that part loses the heat insulation.
Furthermore, since a plurality of relatively small vacuum heat insulating units are connected, the size and shape of the vacuum heat insulating sheet can be freely formed arbitrarily.

以上により、真空断熱シートとしてのフレキシブル性が向上し、また現場での取り扱いも容易となることから、作業効率の向上も期待できる。
また、全体を収縮性フィルムで被覆した場合には、隣り合う断熱芯材どうしの間隔をより小さくすることができるため、断熱ロスを減らすことになり、断熱機能を向上させることができる。
As described above, flexibility as a vacuum heat insulating sheet is improved, and handling on the site is facilitated, so that improvement in work efficiency can be expected.
Moreover, when the whole is coat | covered with a shrinkable film, since the space | interval of adjacent heat insulation core materials can be made smaller, a heat insulation loss will be reduced and a heat insulation function can be improved.

本発明の実施の形態において使用される真空断熱単位を(A)平面図及び(B)断面図にて示す。The vacuum heat insulation unit used in the embodiment of the present invention is shown in (A) a plan view and (B) a sectional view. 図1の真空断熱単位を用いて真空断熱シートを構成する第1の例を(A)平面図及び(B)断面図にて示す。The 1st example which comprises a vacuum heat insulation sheet using the vacuum heat insulation unit of FIG. 1 is shown with (A) top view and (B) sectional drawing. 図1の真空断熱単位を用いて真空断熱シートを構成する第2の例を(A)平面図及び(B)断面図にて示す。The 2nd example which comprises a vacuum heat insulation sheet using the vacuum heat insulation unit of FIG. 1 is shown with (A) top view and (B) sectional drawing. 図1の真空断熱単位を用いて真空断熱シートを構成する第3の例を(A)平面図及び(B)断面図にて示す。The 3rd example which comprises a vacuum heat insulation sheet using the vacuum heat insulation unit of FIG. 1 is shown with (A) top view and (B) sectional drawing. 図3の第2の例に係る真空断熱シートの使用例を断面図にて示す。The usage example of the vacuum heat insulation sheet which concerns on the 2nd example of FIG. 3 is shown with sectional drawing. 図1の真空断熱単位を用いて真空断熱シートを構成する第4の例を斜視図にて示す。The 4th example which comprises a vacuum heat insulation sheet using the vacuum heat insulation unit of FIG. 1 is shown with a perspective view. 全体を収縮性フィルムで被覆した真空断熱シートの第5の例を斜視図にて示す。The 5th example of the vacuum heat insulation sheet which coat | covered the whole with a shrinkable film is shown with a perspective view. 図7の第5の例に係る真空断熱シートを断面図にて示す。The vacuum heat insulation sheet which concerns on the 5th example of FIG. 7 is shown with sectional drawing. 図7及び図8の第5の例に係る真空断熱シートの使用例を断面図にて示す。The usage example of the vacuum heat insulation sheet which concerns on the 5th example of FIG.7 and FIG.8 is shown with sectional drawing.

以下、本発明の実施の形態を図面を参照しつつ説明する。
本発明の実施の形態で使用される真空断熱単位20を図1に示す。
真空断熱単位20は、グラスウールに水分吸着材としてのゲッター剤を添加したものを直角二等辺三角形状に薄く平板状に固めたものを断熱芯材21として(図1(A)参照)、これをアルミニウム箔と合成樹脂フィルムを積層したガス遮断フィルム22の2枚で挟み、これを真空雰囲気中で断熱芯材21の周囲を熱圧着してこれを封入代23としたものである(図1(B)参照)。すなわち、ガス遮断フィルム22間の、断熱芯材21が封入されている空間は真空状態となっている。そして、ガス遮断フィルム22によって内部の真空状態が高度に維持されることになっている。この真空断熱単位20の大きさは特に限定されるものではないが、たとえば、三角形の等辺を10cm程度とすれば、簡易な真空設備中でも熱圧着処理が可能であり、製造がきわめて容易である。またここで用いたガス遮断フィルム22は屈曲性を有し、多少の折り曲げによっては破断を起こさず、それによって断熱性が阻害されることはない。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
A vacuum insulation unit 20 used in the embodiment of the present invention is shown in FIG.
The vacuum heat insulating unit 20 is obtained by adding a glass wool added with a getter agent as a moisture adsorbent to a thin plate in the shape of a right isosceles triangle (see FIG. 1 (A)). It is sandwiched between two sheets of a gas barrier film 22 in which an aluminum foil and a synthetic resin film are laminated, and this is thermocompression-bonded around the heat insulating core material 21 in a vacuum atmosphere, which is used as a sealing allowance 23 (FIG. 1 ( B)). That is, the space between the gas barrier films 22 in which the heat insulating core material 21 is enclosed is in a vacuum state. The internal vacuum state is to be maintained at a high level by the gas barrier film 22. The size of the vacuum heat insulating unit 20 is not particularly limited. For example, when the equilateral side of the triangle is about 10 cm, the thermocompression treatment can be performed even in a simple vacuum facility, and the manufacture is very easy. Further, the gas barrier film 22 used here has flexibility, and does not break by some bending, so that the heat insulation is not hindered.

この真空断熱単位20は、たとえば、隣接する封入代23どうしを図2(B)のように熱圧着又は接着剤で接着することで、図2(A)に示す第1の例のように隙間なく敷き詰めて1枚の任意の大きさの真空断熱シート10とすることができる。
このような第1の例における封入代23どうしの熱圧着又は接着を、図3(B)のように、隣接する真空断熱単位20においては、一方の封入代23が他方の断熱芯材21を有する部分に重ね合わせられているようにして、互いに熱圧着又は接着剤で接着することで、図3(A)に示す第2の例のように隙間なく敷き詰めて1枚の任意の大きさの真空断熱シート10とすれば、平面的に見れば断熱芯材21のない部分が解消され、全体としての断熱性は向上することとなる。
The vacuum heat insulating unit 20 has a gap as shown in the first example shown in FIG. 2A by, for example, adhering adjacent sealing allowances 23 with thermocompression bonding or an adhesive as shown in FIG. 2B. It is possible to form a vacuum heat insulating sheet 10 having an arbitrary size by laying down all the layers.
In such a first example, the thermocompression bonding or adhesion between the sealing allowances 23 is performed by using one sealing allowance 23 for the other insulating core material 21 in the adjacent vacuum heat insulating unit 20 as shown in FIG. As shown in the second example shown in FIG. 3 (A), by laminating them without any gaps, one piece of any size can be obtained. If the vacuum heat insulating sheet 10 is used, a portion without the heat insulating core material 21 is eliminated in a plan view, and the heat insulating property as a whole is improved.

また、図4(B)のように、隣接する真空断熱単位20においては、断熱芯材21を有する部分が互いに重ね合わせられるようにして、互いに熱圧着又は接着剤で接着することで、図4(A)に示す第3の例のように隙間なく敷き詰めて1枚の任意の大きさの真空断熱シート10とすることもできる。このようにすれば、真空断熱単位20を重ね合わせた熱圧着又は接着部分の断熱性がより大きくなる。
なお、前記第2の例に係る真空断熱シート10は、図5に示すように、封入代23による重ね合わせの箇所で屈曲可能な可撓性を備えている。これは、ガス遮断フィルム22が屈曲性を備えているからである。このような可撓性は、前記第1の例及び第3の例に係る真空断熱シート10でも同様に備えているものである。
Further, as shown in FIG. 4B, in the adjacent vacuum heat insulating units 20, the portions having the heat insulating core material 21 are overlapped with each other and bonded to each other by thermocompression bonding or an adhesive. As in the third example shown in (A), it is possible to form one vacuum insulating sheet 10 of any size by spreading without gaps. In this way, the heat-insulating property of the thermocompression-bonded or bonded portion where the vacuum heat-insulating units 20 are superposed is further increased.
In addition, the vacuum heat insulating sheet 10 according to the second example is provided with flexibility that can be bent at a place where the sealing allowance 23 is overlapped as shown in FIG. This is because the gas barrier film 22 is flexible. Such flexibility is also provided in the vacuum heat insulating sheet 10 according to the first and third examples.

本実施の形態に係る真空断熱シート10は、前記第1〜第3の例のように、真空断熱単位20のみを熱圧着又は接着して平面状に構成しているものであるが、図6に示す第4の例のように、合板、石膏ボード、紙、布、合成樹脂シート等の支持体30の上に隙間なく貼り合わせていくことでも形成することができる。この貼り合わせの際には、前記第2又は第3の例のように、断熱芯材21のある部分に封入代23を重ね合わせるようにすればより全体としての断熱性も向上することは上述のとおりである。また、この支持体30を特に紙、布、合成樹脂シートのような可撓性のものとすれば、貼り合わせたあとでも真空断熱シート10の可撓性は維持される。   The vacuum heat insulating sheet 10 according to the present embodiment is configured in a flat shape by thermocompression bonding or bonding only the vacuum heat insulating unit 20 as in the first to third examples. As in the fourth example shown in FIG. 4, the substrate can be formed by bonding together on a support 30 such as plywood, gypsum board, paper, cloth, or synthetic resin sheet without any gap. At the time of this bonding, as described above in the second or third example, if the sealing allowance 23 is overlapped on a portion where the heat insulating core material 21 is provided, the overall heat insulating property is improved. It is as follows. Further, if the support 30 is made of a flexible material such as paper, cloth, or synthetic resin sheet, the flexibility of the vacuum heat insulating sheet 10 is maintained even after being bonded.

なお、図7に示す第5の例においては、前記第1〜第3の例のように真空断熱単位20を平面状に構成したのち、その全体を収縮性フィルム24で被覆し(図7(A))、図7(B)に示すように熱収縮させて密着させている。すなわち、図8に示すように、ガス遮断フィルム22の外層をさらに収縮性フィルム24が密着して被覆することとなっている。これによって、隣り合う断熱芯材21どうしの間隔をより小さくすることができる。   In the fifth example shown in FIG. 7, after the vacuum heat insulating unit 20 is formed in a flat shape as in the first to third examples, the whole is covered with a shrinkable film 24 (FIG. 7 ( A)) and heat-shrink as shown in FIG. That is, as shown in FIG. 8, the outer layer of the gas barrier film 22 is further covered with the shrinkable film 24. As a result, the distance between adjacent heat insulating cores 21 can be further reduced.

なお、この第5の例で用いられる収縮性フィルム24自体は可撓性を有するものである。よって、たとえば前記第2の例の全体をこの収縮性フィルム24で被覆した場合であっても、図9に示すように、前記図5と同様に、真空断熱シート10は封入代23による重ね合わせの箇所で屈曲可能な可撓性を備えている。このような可撓性は、前記第1の例又は第3の例の全体を収縮性フィルム24で被覆した真空断熱シート10でも同様に備えているものである。   Note that the shrinkable film 24 itself used in the fifth example has flexibility. Therefore, for example, even when the whole of the second example is covered with the shrinkable film 24, as shown in FIG. It has the flexibility which can be bent at the point. Such flexibility is also provided in the vacuum heat insulating sheet 10 in which the whole of the first example or the third example is covered with the shrinkable film 24.

本発明は、住宅用の断熱材として利用可能である。また、冷蔵庫や自動販売機、熱交換器など、高い断熱性能と省スペース化を要求される機器の断熱材としても利用可能である。   The present invention can be used as a heat insulating material for a house. It can also be used as a heat insulating material for equipment that requires high heat insulating performance and space saving, such as refrigerators, vending machines, and heat exchangers.

10 真空断熱シート
20 真空断熱単位 21 断熱芯材 22 ガス遮断フィルム
23 封入代 24 収縮性フィルム
30 支持体
10 Vacuum insulation sheet
20 Vacuum insulation unit 21 Insulation core 22 Gas barrier film
23 Sealing cost 24 Shrinkable film
30 Support

Claims (6)

断熱芯材を2枚の屈曲性を有するガス遮断フィルムの間に挟み、その断熱芯材が収容される空間を真空にしつつその断熱芯材の周囲を封入代として圧着して形成した真空断熱単位を複数個平面的に隙間なく貼り合わせて、前記封入代による貼り合わせ部分が可撓性を有する1枚のシート状に成形したことを特徴とする真空断熱シート。   A vacuum heat insulating unit formed by sandwiching a heat insulating core material between two flexible gas barrier films, and vacuuming the space in which the heat insulating core material is accommodated while pressing the periphery of the heat insulating core material as a sealing allowance A vacuum heat insulating sheet characterized in that a plurality of layers are bonded together in a planar manner without gaps, and the bonded portion by the sealing allowance is formed into a single sheet having flexibility. 隣接する前記真空断熱単位においては、一方の前記封入代が他方の前記断熱芯材を有する部分に重ね合わせられていることを特徴とする請求項1記載の真空断熱シート。   2. The vacuum heat insulating sheet according to claim 1, wherein, in the adjacent vacuum heat insulating units, one of the sealing margins is overlapped with a portion having the other heat insulating core material. 隣接する前記真空断熱単位においては、前記断熱芯材を有する部分が互いに重ね合わせられていることを特徴とする請求項1記載の真空断熱シート。   The vacuum heat insulating sheet according to claim 1, wherein in the adjacent vacuum heat insulating units, the portions having the heat insulating core material are overlapped with each other. 前記真空断熱単位を平面的な支持体に隙間なく貼り合わせて前記1枚のシート状に成形したことを特徴とする請求項1、2又は3記載の真空断熱シート。   The vacuum heat insulating sheet according to claim 1, 2 or 3, wherein the vacuum heat insulating unit is bonded to a flat support member without any gap and formed into the single sheet. 前記支持体は可撓性を有することを特徴とする請求項4記載の真空断熱シート。   The vacuum heat insulating sheet according to claim 4, wherein the support has flexibility. 前記1枚のシート状に成形したその全体を収縮性フィルムで被覆し収縮させ前記ガス遮断フィルムと密着させたことを特徴とする請求項1、2又は3記載の真空断熱シート。   4. The vacuum heat insulating sheet according to claim 1, wherein the whole sheet formed into a single sheet is covered with a shrinkable film and contracted to be in close contact with the gas barrier film.
JP2012260905A 2012-11-29 2012-11-29 Vacuum heat insulation sheet Pending JP2014105829A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5828093A (en) * 1981-08-07 1983-02-18 松下電器産業株式会社 Flexible vacuum heat insulating material
JPH01263041A (en) * 1988-04-15 1989-10-19 Meisei Kogyo Kk Heat insulating construction and manufacture thereof
JP2004346908A (en) * 2003-05-26 2004-12-09 Toyota Motor Corp Heat accumulator of internal combustion engine
JP2007212059A (en) * 2006-02-10 2007-08-23 Matsushita Electric Ind Co Ltd Heat pump water heater

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5828093A (en) * 1981-08-07 1983-02-18 松下電器産業株式会社 Flexible vacuum heat insulating material
JPH01263041A (en) * 1988-04-15 1989-10-19 Meisei Kogyo Kk Heat insulating construction and manufacture thereof
JP2004346908A (en) * 2003-05-26 2004-12-09 Toyota Motor Corp Heat accumulator of internal combustion engine
JP2007212059A (en) * 2006-02-10 2007-08-23 Matsushita Electric Ind Co Ltd Heat pump water heater

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