JP2003314786A - Vacuum heat insulating material as well as refrigerating equipment and cooling equipment using vacuum heat insulating material - Google Patents

Vacuum heat insulating material as well as refrigerating equipment and cooling equipment using vacuum heat insulating material

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Publication number
JP2003314786A
JP2003314786A JP2002123993A JP2002123993A JP2003314786A JP 2003314786 A JP2003314786 A JP 2003314786A JP 2002123993 A JP2002123993 A JP 2002123993A JP 2002123993 A JP2002123993 A JP 2002123993A JP 2003314786 A JP2003314786 A JP 2003314786A
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JP
Japan
Prior art keywords
heat insulating
core material
vacuum heat
insulating material
core
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2002123993A
Other languages
Japanese (ja)
Other versions
JP3563729B2 (en
JP2003314786A5 (en
Inventor
Chie Hirai
千恵 平井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Refrigeration Co
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Filing date
Publication date
Application filed by Matsushita Refrigeration Co filed Critical Matsushita Refrigeration Co
Priority to JP2002123993A priority Critical patent/JP3563729B2/en
Publication of JP2003314786A publication Critical patent/JP2003314786A/en
Application granted granted Critical
Publication of JP3563729B2 publication Critical patent/JP3563729B2/en
Publication of JP2003314786A5 publication Critical patent/JP2003314786A5/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of a vacuum heat insulating material having a larger fin portion wherein an effective heat insulating area is reduced or the flow of a urethane foam is hindered when the insulating material is applied for a refrigerator, resulting in lower heat insulating performance or a deformed wall surface. <P>SOLUTION: By specifying the bending elastic modulus and density of a board core material before and after depressurized, the core material can be smoothly inserted into a casing material even if a gap between the core material and the casing material is smaller. Furthermore, by specifying a difference between the outer periphery length of the core material and each of the inner and outer periphery lengths of the casing material, the vacuum heating insulating material having a smaller fin portion is obtained. <P>COPYRIGHT: (C)2004,JPO

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、断熱を必要とする
もの、例えば冷凍冷蔵庫、保温保冷容器、自動販売機、
電気湯沸かし器、車両、及び住宅等の断熱材として使用
可能な真空断熱材に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device requiring heat insulation, such as a refrigerator / freezer, a heat and cold container, a vending machine,
The present invention relates to a vacuum heat insulating material that can be used as a heat insulating material for electric water heaters, vehicles, houses, and the like.

【０００２】[0002]

【従来の技術】近年、地球温暖化防止の観点から省エネ
ルギーが強く望まれており、家庭用電化製品についても
省エネルギー化は緊急の課題となっている。特に、冷凍
冷蔵庫、自動販売機等の保温保冷機器では熱を効率的に
利用するという観点から、優れた断熱性能を有する断熱
材が求められている。2. Description of the Related Art In recent years, energy saving has been strongly demanded from the viewpoint of preventing global warming, and energy saving has become an urgent issue for household electric appliances. In particular, a heat insulating material having an excellent heat insulating property is required from the viewpoint of efficiently utilizing heat in a heat insulating device such as a refrigerator-freezer and a vending machine.

【０００３】一般的な断熱材として、グラスウールなど
の繊維材やウレタンフォームなどの発泡体が用いられて
いる。しかし、これらの断熱材の断熱性を向上するため
には断熱材の厚さを増す必要があり、断熱材を充填でき
る空間に制限があって省スペースや空間の有効利用が必
要な場合には適用することができない。As a general heat insulating material, a fiber material such as glass wool or a foamed material such as urethane foam is used. However, in order to improve the heat insulating properties of these heat insulating materials, it is necessary to increase the thickness of the heat insulating material, and when there is a limit to the space where the heat insulating material can be filled and space saving or effective use of space is required, Not applicable.

【０００４】そこで、高性能な断熱材として真空断熱材
が提案されている。これは、スペーサの役割を持つ芯材
を、ガスバリア性を有する外被材の中に挿入し内部を減
圧して封止した断熱材である。Therefore, a vacuum heat insulating material has been proposed as a high performance heat insulating material. This is a heat insulating material in which a core material having a role of a spacer is inserted into an outer covering material having a gas barrier property and the inside is depressurized and sealed.

【０００５】芯材としては一般的に多孔体が用いられ、
大きく分類すると、連通フォーム、繊維系、粉末系等に
分類される。A porous material is generally used as the core material,
When broadly classified, they are classified into communication foam, fiber type, powder type and the like.

【０００６】これらの芯材を外被材に封入した際、真空
断熱材の周縁部には封止のための熱溶着部及び芯材挿入
のための余裕代が、芯材が間に存在しない、外被材のみ
から構成されるひれ部として生じる。[0006] When these core materials are enclosed in the jacket material, there is no heat welding portion for sealing and a margin for inserting the core material in the peripheral portion of the vacuum heat insulating material. , It occurs as a fin portion composed only of the outer covering material.

【０００７】ひれ部には断熱効果がないため有効断熱面
積が減少するだけでなく、例えば冷凍冷蔵庫の断熱壁に
真空断熱材を適用し、更に発泡断熱材を充填した場合に
は、真空断熱材のひれ部により発泡断熱材の発泡や流動
が妨げられ、発泡断熱材が充填されないキャビティーが
生じ易くなり、これによって熱漏洩や壁面の変形等が生
じる。Since the fin portion has no heat insulating effect, not only the effective heat insulating area is reduced, but, for example, when a vacuum heat insulating material is applied to a heat insulating wall of a refrigerator / freezer and a foam heat insulating material is further filled, the vacuum heat insulating material is used. The fin portion hinders foaming and flow of the foamed heat insulating material, which easily causes a cavity not filled with the foamed heat insulating material, which causes heat leakage and deformation of the wall surface.

【０００８】そこで、ひれ部の悪影響をなくすために、
特許第１５１９８７１号公報にはひれ部を折り曲げて固
定する技術が記載されている。Therefore, in order to eliminate the adverse effect of the fin,
Japanese Patent No. 1519871 describes a technique of bending and fixing a fin portion.

【０００９】しかし、ひれ部を折り曲げて固定すること
は工数やコストの増加につながるとともに、折り曲げた
ひれ部と真空断熱材の芯材部との間に空間が生じると断
熱性能の低下につながる。However, bending and fixing the fins leads to an increase in man-hours and costs, and if a space is formed between the bent fins and the core of the vacuum heat insulating material, the heat insulating performance is deteriorated.

【００１０】また、ひれ部を減少させた真空断熱材とし
て、特開平７−２６９７８１号公報に記載の真空断熱材
がある。Further, as a vacuum heat insulating material with reduced fins, there is a vacuum heat insulating material described in JP-A-7-269781.

【００１１】これは、外被材のひれ部がない辺を有する
袋形態を規定してひれ部を減少させることにより、例え
ば冷蔵庫に真空断熱材および発泡断熱材を適用した場合
にも発泡断熱材の発泡や流動を容易にしている。This is because by defining a bag shape having a side without a fin portion of the outer covering material and reducing the fin portion, even when a vacuum heat insulating material and a foam heat insulating material are applied to a refrigerator, for example, a foam heat insulating material is used. It facilitates foaming and flow.

【００１２】[0012]

【発明が解決しようとする課題】しかしながら、どのよ
うな袋形態においても、芯材外寸より外被材内寸を大き
く取る必要があり、その差の余裕代部分が、外被材内部
を減圧したときに間に芯材を含まないひれ部となってし
まう。However, in any bag form, it is necessary to make the inner dimension of the outer cover material larger than the outer dimension of the core member, and the margin portion of the difference reduces the pressure inside the outer cover material. When it is done, it will become a fin that does not include the core material.

【００１３】また、芯材外寸と外被材内寸との差を小さ
くし、外被材中に芯材を隙間なく挿入しようとしても、
例えば芯材に粉末を内袋に入れたものを用いた場合など
芯材に剛性がないと挿入が困難となり、外被材と芯材と
の間に隙間を大きく設ける必要がある。Further, even if the difference between the outer dimension of the core material and the inner dimension of the outer jacket material is reduced to insert the core material into the outer jacket material without any gap,
For example, if the core material is powdered in an inner bag and the core material is not rigid, it becomes difficult to insert the core material, and it is necessary to provide a large gap between the outer covering material and the core material.

【００１４】本発明は、芯材の曲げ弾性率により芯材に
必要な剛性を明らかにして、外被材のひれ部をより少な
くするものである。The present invention clarifies the rigidity required for the core material by the bending elastic modulus of the core material to further reduce the fin portion of the outer covering material.

【００１５】[0015]

【課題を解決するための手段】上記問題を解決するた
め、本発明の真空断熱材は、ボード状の芯材と、前記芯
材を覆い内部を減圧した外被材とを備え、前記芯材の減
圧前の曲げ弾性率が０．５ＭＰａ以上であることを特徴
とするものである。In order to solve the above problems, a vacuum heat insulating material of the present invention comprises a board-shaped core material and an outer covering material which covers the core material and reduces the pressure inside. The bending elastic modulus before depressurization is 0.5 MPa or more.

【００１６】曲げ弾性率が０．５ＭＰａ以上の芯材を用
いることにより、芯材を外被材に挿入する際に芯材がた
わんだり、あるいは割れたりすることもないため、芯材
と外被材との隙間を小さくしてもスムーズに芯材を挿入
することができ、ひれ部の少ない真空断熱材を得ること
が可能となる。By using a core material having a flexural modulus of 0.5 MPa or more, the core material does not bend or break when the core material is inserted into the jacket material. Even if the gap with the material is reduced, the core material can be smoothly inserted, and a vacuum heat insulating material with few fins can be obtained.

【００１７】芯材の曲げ弾性率が０．５ＭＰａ未満にな
るとたわみ等が発生し、芯材と外被材の隙間を大きくし
なければ挿入は容易ではない。When the bending elastic modulus of the core material is less than 0.5 MPa, bending or the like occurs, and insertion is not easy unless the gap between the core material and the jacket material is increased.

【００１８】また、本発明の真空断熱材は、芯材が平均
繊維径０．１μｍ以上１０μｍ以下の無機繊維と、前記
無機繊維に対して２０ｗｔ％以下のバインダーとからな
り、前記芯材の減圧前の密度が１００ｋｇ／ｍ3以上４
００ｋｇ／ｍ3以下であることを特徴としている。In the vacuum heat insulating material of the present invention, the core material is composed of inorganic fibers having an average fiber diameter of 0.1 μm or more and 10 μm or less and a binder of 20 wt% or less with respect to the inorganic fibers. Previous density is 100kg / m 3 or more 4
It is characterized by being less than 00 kg / m 3 .

【００１９】無機繊維を主成分とし、バインダーを用い
て成形したボード状の芯材とすることにより剛性が確保
でき、芯材と外被材との隙間が小さくても外被材のへり
で芯材が削られることを抑制することが可能となる。By using a board-shaped core material containing inorganic fibers as a main component and molded with a binder, rigidity can be ensured, and even if the gap between the core material and the outer covering material is small, the core is formed by the edge of the outer covering material. It is possible to prevent the material from being scraped.

【００２０】これに伴い、外被材のへりで芯材が削られ
て結局芯材と外被材の隙間が大きくなったり、削られた
芯材が粉体となって外被材に付着して、減圧後にシール
不良を引き起こす可能性も大幅に減少する。Along with this, the core material is shaved by the edge of the outer covering material and eventually the gap between the core material and the outer covering material becomes large, or the shaved core material becomes powder and adheres to the outer covering material. Therefore, the possibility of causing a seal failure after depressurization is greatly reduced.

【００２１】ここで、芯材に用いる無機繊維の平均繊維
径が０．１μｍ未満であれば工業的生産は困難で実用上
不向きであり、１０μｍより大きいと繊維間の空隙が大
きくなり、初期断熱性能に優れた真空断熱材を得ること
ができない。Here, if the average fiber diameter of the inorganic fibers used as the core material is less than 0.1 μm, industrial production is difficult and unsuitable for practical use. It is not possible to obtain a vacuum heat insulating material with excellent performance.

【００２２】また、密度を１００ｋｇ／ｍ3以上４００
ｋｇ／ｍ3以下にすることにより繊維間の空隙径を減少
させ、さらに無機繊維に対して２０ｗｔ％以下のバイン
ダーを添加して上記密度を保持することにより、所定の
繊維径に対し初期断熱性能、及び信頼性の面から最適な
空隙径を保持した芯材を得ることができる。The density is 100 kg / m 3 or more and 400
The void diameter between the fibers is reduced by setting it to not more than kg / m 3 and further the binder is added to the inorganic fibers in an amount of 20 wt% or less to maintain the above-mentioned density, so that the initial heat insulation performance for a given fiber diameter is achieved. In addition, from the viewpoint of reliability, it is possible to obtain the core material that holds the optimum void diameter.

【００２３】ここで、密度が１００ｋｇ／ｍ3未満であ
ればボードの剛性を維持することが困難であり、芯材と
外被材の隙間が小さい場合はうまく芯材を挿入すること
ができず、また４００ｋｇ／ｍ3より大きいと固体熱伝
導の影響が大きくなり初期断熱性能が悪化する。Here, if the density is less than 100 kg / m 3 , it is difficult to maintain the rigidity of the board, and if the gap between the core material and the jacket material is small, the core material cannot be inserted properly. On the other hand, if it is more than 400 kg / m 3, the effect of solid heat conduction becomes large and the initial heat insulation performance deteriorates.

【００２４】更に、バインダー添加量が２０ｗｔ％より
大きいと固体熱伝導の影響が大きくなり初期断熱性能が
悪化する。Further, if the amount of the binder added is larger than 20 wt%, the effect of solid heat conduction becomes large and the initial heat insulation performance deteriorates.

【００２５】また、本発明の真空断熱材は、ボード状の
芯材と、前記芯材を覆い内部を減圧した外被材とを備
え、減圧後、大気圧下で前記外被材より取り出した時の
前記芯材の曲げ弾性率が０．２ＭＰａ以上であることを
特徴とするものである。Further, the vacuum heat insulating material of the present invention comprises a board-shaped core material and an outer covering material covering the core material and having a depressurized interior, and after depressurizing, it is taken out from the outer covering material under atmospheric pressure. The bending elastic modulus of the core material at this time is 0.2 MPa or more.

【００２６】繊維材をバインダーを使用して成形した芯
材は弾性があるために、外被材に挿入して減圧し、大気
圧により圧縮されると僅かではあるが縮小変形する傾向
がある。この変形によりバインダーによる繊維同士の固
着が破壊され、曲げ弾性率は低下する。Since the core material formed by using the fibrous material with the binder has elasticity, when it is inserted into the jacket material to reduce the pressure and is compressed by the atmospheric pressure, the core material tends to be slightly deformed. Due to this deformation, the binding of the fibers to each other by the binder is destroyed, and the flexural modulus decreases.

【００２７】この点に配慮したもので、減圧後、大気圧
下で前記外被材より取り出した時の前記芯材の曲げ弾性
率が０．２ＭＰａ以上の芯材を用いれば、芯材を外被材
に挿入する際に芯材がたわんだり、あるいは割れたりす
ることもないため、芯材と外被材との隙間を小さくして
もスムーズに芯材を挿入することができ、ひれ部の少な
い真空断熱材を得ることが可能となる。In consideration of this point, if a core material having a bending elastic modulus of 0.2 MPa or more when taken out from the jacket material under atmospheric pressure after decompression is used, the core material is Since the core material does not bend or crack when it is inserted into the material, the core material can be inserted smoothly even if the gap between the core material and the outer material is reduced, and the fin part It is possible to obtain a small amount of vacuum heat insulating material.

【００２８】また、本発明の真空断熱材は、芯材が平均
繊維径０．１μｍ以上１０μｍ以下の無機繊維と、前記
無機繊維に対して２０ｗｔ％以下のバインダーとからな
り、減圧後、大気圧下で外被材内における前記芯材の密
度が１１０ｋｇ／ｍ3以上４１３ｋｇ／ｍ3以下であるこ
とを特徴としている。In the vacuum heat insulating material of the present invention, the core material is composed of inorganic fibers having an average fiber diameter of 0.1 μm or more and 10 μm or less and a binder of 20 wt% or less with respect to the inorganic fibers. is characterized in that the density of the core material in the enveloping member in the under is not more than 110 kg / m 3 or more 413kg / m 3.

【００２９】上述したとおり、芯材を減圧すると大気圧
縮により縮小変形する傾向があり、外被材内における芯
材の密度は減圧封止前より増加する。As described above, when the pressure of the core material is reduced, the core material tends to be contracted and deformed due to atmospheric compression, and the density of the core material in the jacket material is higher than that before the pressure reduction sealing.

【００３０】この点に配慮したもので、大気圧下で外被
材内における前記芯材の密度が１１０ｋｇ／ｍ3以上４
１３ｋｇ／ｍ3以下の芯材を用いれば、芯材と外被材と
の隙間が小さくても外被材のへりで芯材が削られること
を抑制することが可能で、所定の繊維径に対し初期断熱
性能、及び信頼性の面から最適な空隙径を保持した芯材
を得ることができる。In consideration of this point, the density of the core material in the outer covering material is 110 kg / m 3 or more under atmospheric pressure 4
If a core material of 13 kg / m 3 or less is used, it is possible to prevent the core material from being scraped by the edge of the outer covering material even if the gap between the core material and the outer covering material is small, and to obtain a predetermined fiber diameter. On the other hand, it is possible to obtain a core material having an optimum void diameter in terms of initial heat insulation performance and reliability.

【００３１】また、本発明の真空断熱材は、少なくとも
ボード状の芯材を外被材の一辺の開口部から外被材中に
挿入する挿入ステップと、前記外被材内を減圧する減圧
ステップと、前記開口部を封止する封止ステップとを含
む製造方法で作製され、前記開口部の内周長と、前記開
口部と平行方向における前記芯材の外周長最大部との差
が０ｍｍより大きく３０ｍｍ以下であることを特徴とす
るものである。In the vacuum heat insulating material of the present invention, an inserting step of inserting at least a board-shaped core material into an outer covering material from an opening of one side of the outer covering material, and a depressurizing step of decompressing the inside of the outer covering material. And a sealing step of sealing the opening, the difference between the inner circumference of the opening and the maximum outer circumference of the core in the direction parallel to the opening is 0 mm. It is characterized by being larger than 30 mm.

【００３２】芯材を外被材中に挿入する際、開口部の内
周長が芯材外周長に対して大きすぎるとひれ部が増大
し、小さすぎると芯材をスムーズに挿入できない。When the core material is inserted into the jacket material, the fin portion increases if the inner peripheral length of the opening is too large relative to the outer peripheral length of the core material, and if the core material is too small, the core material cannot be smoothly inserted.

【００３３】ここで、曲げ弾性率が所定の値以上の芯材
であれば、開口部の内周長と芯材外周長との差が３０ｍ
ｍ以下という余裕代が小さい状態でもスムーズに挿入で
きるものである。Here, if the bending elastic modulus is a predetermined value or more, the difference between the inner peripheral length of the opening and the outer peripheral length of the core is 30 m.
It can be inserted smoothly even when the margin is less than m.

【００３４】このようにして作製した真空断熱材は、芯
材まわりにできるひれ部の面積を低減できる。The vacuum heat insulating material thus produced can reduce the area of the fin portion formed around the core material.

【００３５】また、本発明の真空断熱材は、外被材の開
口部と平行方向における少なくとも一断面において、減
圧封止後の芯材の外周長と外被材の外周長との差が０ｍ
ｍより大きく７０ｍｍ以下であることを特徴としてい
る。Further, in the vacuum heat insulating material of the present invention, the difference between the outer peripheral length of the core material and the outer peripheral length of the outer covering material after the vacuum sealing is 0 m in at least one cross section in the direction parallel to the opening of the outer covering material.
It is characterized by being larger than m and 70 mm or less.

【００３６】外被材の外周長と芯材の外周長との差を７
０ｍｍ以下にすることにより、どのような袋形態におい
てもひれ部を最小限に抑制できるような外被材を得るこ
とができる。The difference between the outer peripheral length of the jacket material and the outer peripheral length of the core material is set to 7
By setting the thickness to 0 mm or less, it is possible to obtain a covering material that can minimize the fin portion in any bag shape.

【００３７】例えば、四方シール袋のように真空断熱材
の一断面においてひれ部が２方向にある外被材では、外
被材の外周長と芯材の外周長との差を７０ｍｍ以下にす
ることにより、芯材を外被材の中心に置くと、真空断熱
材の片側に生じるひれ部の長さは１７.５mm以下とな
り、これであれば、例えば冷凍冷蔵庫の断熱壁に真空断
熱材及び発泡断熱材を適用した場合でも発泡断熱材が良
好に充填され、熱漏洩や壁面の変形等が生じることもな
い。For example, in the case of a jacket material having fins in two directions in one cross section of a vacuum heat insulating material such as a four-sided sealing bag, the difference between the outer peripheral length of the outer jacket material and the outer peripheral length of the core material is 70 mm or less. As a result, when the core material is placed in the center of the jacket material, the length of the fin portion formed on one side of the vacuum heat insulating material is 17.5 mm or less. Even when the foamed heat insulating material is applied, the foamed heat insulating material is well filled, and heat leakage and deformation of the wall surface do not occur.

【００３８】また、本発明の真空断熱材を用いた冷凍機
器及び冷温機器は、外箱と、内箱と、前記外箱と前記内
箱によって形成される空間に上記本発明の真空断熱材を
有することを特徴とするものである。Further, a refrigerating machine and a cold machine using the vacuum heat insulating material of the present invention are provided with the vacuum heat insulating material of the present invention in an outer box, an inner box, and a space formed by the outer box and the inner box. It is characterized by having.

【００３９】外箱と内箱とによって形成される空間に、
本発明のひれ部を減少させた真空断熱材を配置し、残り
の空間に発泡断熱材を充填する場合に、真空断熱材のひ
れ部により発泡断熱材の発泡や流動が妨げられることも
なく、発泡断熱材が均一に充填された、断熱性能に優れ
た冷凍機器および冷温機器を得ることができる。In the space formed by the outer box and the inner box,
A vacuum heat insulating material with reduced fins of the present invention is arranged, and when the remaining space is filled with foam heat insulating material, the fins of the vacuum heat insulating material do not prevent foaming or flow of the foam heat insulating material, It is possible to obtain a refrigerating device and a cold / hot device having excellent heat insulating performance, in which the foamed heat insulating material is uniformly filled.

【００４０】また、本発明の真空断熱材を用いた冷凍機
器及び冷温機器は、圧縮機と、凝縮器と、キャピラリチ
ューブと、蒸発器とを環状に接続した冷凍サイクルを備
え、前記冷凍サイクル内に可燃性を有する冷媒を封入
し、外箱と、内箱と、外箱と内箱とによって形成される
空間に、上記本発明の真空断熱材を有することを特徴と
するものである。A refrigerating machine and a cold / warm machine using the vacuum heat insulating material of the present invention include a refrigerating cycle in which a compressor, a condenser, a capillary tube, and an evaporator are connected in an annular shape. And a vacuum heat insulating material of the present invention is provided in a space formed by the outer box, the inner box, and the outer box and the inner box.

【００４１】例えば、冷凍冷蔵庫の断熱壁にひれ部を減
少させた真空断熱材と発泡断熱材を用いることにより、
発泡断熱材が均一に充填された、断熱性能に優れた冷凍
冷蔵庫を得ることができるとともに、可燃性冷媒を封入
した冷凍冷蔵庫に、特に無機繊維を使用した真空断熱材
を配設することにより、何らかの条件により外部から冷
凍冷蔵庫に類焼した場合でも、可燃性冷媒への類焼を減
少させることができる。For example, by using a vacuum heat insulating material with reduced fins and a foam heat insulating material on the heat insulating wall of a refrigerator-freezer,
Foamed heat insulating material is uniformly filled, it is possible to obtain a freezer-refrigerator having excellent heat insulating performance, and in a freezer-refrigerator filled with a flammable refrigerant, by arranging a vacuum heat insulating material using inorganic fibers, Even if the freezer-refrigerator is burnt from the outside under some condition, the burn-in to the flammable refrigerant can be reduced.

【００４２】[0042]

【発明の実施の形態】以下、本発明の真空断熱材、並び
に真空断熱材を用いた冷凍機器及び冷温機器について実
施の形態を説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the vacuum heat insulating material of the present invention, and a refrigerating machine and a cold / warm machine using the vacuum heat insulating material will be described below.

【００４３】本発明の真空断熱材は、ボード状の芯材
と、前記芯材を覆い内部を減圧した外被材とを備えたも
のである。The vacuum heat insulating material of the present invention is provided with a board-shaped core material and an outer covering material that covers the core material and reduces the pressure inside.

【００４４】ボード状の芯材とは、有機あるいは無機繊
維を成形してボード状にしたもの、粉末を固形化しボー
ド状にしたもの、発泡樹脂をボード状にしたものなどで
あり、材料や形状を特に限定するものではない。The board-shaped core material is a material formed by molding organic or inorganic fibers into a board shape, solidified powder into a board shape, or foamed resin into a board shape. Is not particularly limited.

【００４５】例えば繊維をボード状にした芯材では、グ
ラスウール，グラスファイバー，アルミナ繊維，シリカ
アルミナ繊維，シリカ繊維，ロックウール，炭化ケイ素
繊維等の無機繊維、あるいは木綿等の天然繊維，ポリエ
ステル，ナイロン等の合成繊維等の有機繊維など、公知
の材料を使用することができ、無機や有機の液状バイン
ダーにて固形化するのが一般的である。For example, in the case of a core material made of fiber in the form of board, inorganic fibers such as glass wool, glass fiber, alumina fiber, silica alumina fiber, silica fiber, rock wool and silicon carbide fiber, or natural fiber such as cotton, polyester and nylon. Known materials such as synthetic fibers and other organic fibers can be used, and they are generally solidified with an inorganic or organic liquid binder.

【００４６】また、粉末をボード状にした芯材ではシリ
カ，パーライト，カーボンブラック等の無機粉末、ある
いは合成樹脂粉末等の有機粉末などを、繊維バインダー
あるいは無機や有機の液状バインダーにて固形化する
等、公知の材料を使用することができる。In the case of a core material in the form of a board made of powder, inorganic powder such as silica, pearlite or carbon black, or organic powder such as synthetic resin powder is solidified with a fiber binder or an inorganic or organic liquid binder. Known materials such as the above can be used.

【００４７】前記バインダーは、無機あるいは有機バイ
ンダー等が使用可能であり、具体的には、コロイダルシ
リカ，アルミナゾル，水ガラス，セッコウ，低融点ガラ
ス，ケイ酸ナトリウム等の無機バインダー、あるいはフ
ェノール樹脂，尿素樹脂，メラミン樹脂，キシレン樹
脂，フラン樹脂，エポキシ樹脂等の熱硬化性樹脂、ある
いは酢酸ビニル，アクリル系樹脂等の熱可塑性樹脂、あ
るいは天然物接着剤等の有機バインダーであり、これら
を混合して使用したり、あるいはこれらを水あるいは公
知の有機溶媒で希釈して使用することも可能である。As the binder, an inorganic or organic binder can be used. Specifically, an inorganic binder such as colloidal silica, alumina sol, water glass, gypsum, low melting point glass, sodium silicate, or a phenol resin, urea. Thermosetting resin such as resin, melamine resin, xylene resin, furan resin, epoxy resin, or thermoplastic resin such as vinyl acetate or acrylic resin, or organic binder such as natural product adhesive. It is also possible to use these, or to use them after diluting them with water or a known organic solvent.

【００４８】また、発泡樹脂ではウレタンフォーム，フ
ェノールフォーム，スチレンフォーム等、公知の材料を
使用することができる。As the foamed resin, known materials such as urethane foam, phenol foam and styrene foam can be used.

【００４９】本発明の真空断熱材の外被材とは、各種フ
ィルムを積層したラミネートフィルムにより構成され、
少なくともガスバリア層および熱融着層を有するもので
あり、必要に応じて表面保護層等を設けてもよい。The jacket material of the vacuum heat insulating material of the present invention is composed of a laminated film in which various films are laminated,
It has at least a gas barrier layer and a heat fusion layer, and may have a surface protective layer or the like as necessary.

【００５０】前記ガスバリア層としては、金属箔、ある
いは金属や無機酸化物、又はダイヤモンドライクカーボ
ンを蒸着したプラスチックフィルム等を用いることがで
きるが、気体透過を低減する目的で用いるものであれ
ば、特に指定するものではない。As the gas barrier layer, a metal foil, a metal or inorganic oxide, a plastic film deposited with diamond-like carbon, or the like can be used, but if it is used for the purpose of reducing gas permeation, it is particularly preferable. Not specified.

【００５１】上記金属箔としては、アルミニウム，ステ
ンレス，鉄等の箔を用いることができるが、特に指定す
るものではない。As the metal foil, foil of aluminum, stainless steel, iron or the like can be used, but it is not particularly specified.

【００５２】また、前記金属等の蒸着を行う基材となる
プラスチックフィルムの材料は特に指定するものではな
いが、ポリエチレンテレフタレート，エチレン−ビニル
アルコール共重合体樹脂，ポリエチレンナフタレート，
ナイロン，ポリアミド，ポリイミドなどへの蒸着が好ま
しい。The material of the plastic film as the base material on which the metal or the like is vapor-deposited is not particularly specified, but polyethylene terephthalate, ethylene-vinyl alcohol copolymer resin, polyethylene naphthalate,
Vapor deposition on nylon, polyamide, polyimide, etc. is preferred.

【００５３】前記プラスチックフィルム上への金属蒸着
の材料は、アルミニウム，コバルト，ニッケル，亜鉛，
銅，銀、あるいはそれらの混合物等特に指定するもので
はない。Materials for vapor deposition of metal on the plastic film are aluminum, cobalt, nickel, zinc,
Copper, silver, or a mixture thereof is not specified.

【００５４】また、前記プラスチックフィルム上への無
機酸化物蒸着の材料は、シリカ，アルミナ等特に指定す
るものではない。The material for depositing the inorganic oxide on the plastic film is not specified, such as silica or alumina.

【００５５】熱溶着層としては、低密度ポリエチレンフ
ィルム，鎖状低密度ポリエチレンフィルム，高密度ポリ
エチレンフィルム，ポリプロピレンフィルム，ポリアク
リロニトリルフィルム，無延伸ポリエチレンテレフタレ
ートフィルム，エチレン−ビニルアルコール共重合体フ
ィルム、あるいはそれらの混合体等を用いることができ
るが、特に指定するものではない。As the heat-welding layer, a low density polyethylene film, a chain low density polyethylene film, a high density polyethylene film, a polypropylene film, a polyacrylonitrile film, an unstretched polyethylene terephthalate film, an ethylene-vinyl alcohol copolymer film, or those It is possible to use a mixture of the above, but it is not particularly specified.

【００５６】また、ガスバリア層の外面に表面保護層を
設けることも可能である。表面保護層としては、ポリエ
チレンテレフタレートフィルム，ポリプロピレンフィル
ムの延伸加工品などが利用でき、さらに外側にナイロン
フィルムなどを設けると可とう性が向上し、耐折り曲げ
性などが向上する。It is also possible to provide a surface protective layer on the outer surface of the gas barrier layer. As the surface protective layer, a polyethylene terephthalate film, a stretched product of polypropylene film, or the like can be used. Further, when a nylon film or the like is provided on the outer side, flexibility is improved and bending resistance is improved.

【００５７】以上のようなフィルムをラミネートして用
いる。The above films are laminated and used.

【００５８】外被材の袋形状は、四方シール袋，ガゼッ
ト袋，Ｌ字袋，ピロー袋，センターテープシール袋等、
特に限定するものでない。The bag shape of the jacket material is a four-sided seal bag, a gusset bag, an L-shaped bag, a pillow bag, a center tape seal bag, etc.
It is not particularly limited.

【００５９】さらに真空断熱材の信頼性を向上させる場
合は、ガス吸着剤や水分吸着剤等のゲッター物質を使用
することも可能である。その吸着機構は、物理吸着，化
学吸着、および吸蔵，収着等のいずれでもよいが、非蒸
発型ゲッターとして作用する物質が良好である。Further, in order to improve the reliability of the vacuum heat insulating material, a getter substance such as a gas adsorbent or a water adsorbent can be used. The adsorption mechanism may be physical adsorption, chemical adsorption, occlusion, sorption, or the like, but a substance that acts as a non-evaporable getter is preferable.

【００６０】具体的には、合成ゼオライト，活性炭，活
性アルミナ，シリカゲル，ドーソナイト，ハイドロタル
サイト等の物理吸着剤の他、化学吸着剤としては、アル
カリ金属やアルカリ土類金属の酸化物や、アルカリ金属
やアルカリ土類金属の水酸化物等が利用でき、特に、酸
化リチウム，水酸化リチウム，酸化カルシウム，水酸化
カルシウム，酸化マグネシウム，水酸化マグネシウム，
酸化バリウム，水酸化バリウムが効果的に作用する。硫
酸カルシウム，硫酸マグネシウム，硫酸ナトリウム，炭
酸ナトリウム，炭酸カリウム，塩化カルシウム，炭酸リ
チウム，不飽和脂肪酸，鉄化合物等も効果的に作用す
る。Specifically, in addition to physical adsorbents such as synthetic zeolite, activated carbon, activated alumina, silica gel, dawsonite and hydrotalcite, chemical adsorbents include oxides of alkali metals and alkaline earth metals and alkalis. Hydroxides of metals and alkaline earth metals can be used, especially lithium oxide, lithium hydroxide, calcium oxide, calcium hydroxide, magnesium oxide, magnesium hydroxide,
Barium oxide and barium hydroxide work effectively. Calcium sulfate, magnesium sulfate, sodium sulfate, sodium carbonate, potassium carbonate, calcium chloride, lithium carbonate, unsaturated fatty acids, iron compounds, etc. also act effectively.

【００６１】また、バリウム，マグネシウム，カルシウ
ム，ストロンチウム，チタン，ジルコニウム，バナジウ
ム等の物質を単独、もしくは合金化したゲッター物質を
適用するのがより効果的である。Further, it is more effective to apply a getter substance obtained by singly or alloying substances such as barium, magnesium, calcium, strontium, titanium, zirconium, vanadium.

【００６２】更には、このようなゲッター物質を少なく
とも窒素，酸素，水分，二酸化炭素を吸着除去するた
め、種々混合して適用することも可能である。Furthermore, in order to adsorb and remove at least nitrogen, oxygen, water, and carbon dioxide, such getter substances can be mixed and applied in various ways.

【００６３】真空断熱材の製造方法は、１枚又は２枚の
ラミネートフィルムを使用して袋状の外被材を作製し、
その外被材中に開口部から芯材を挿入する挿入ステップ
を経て内部を減圧する減圧ステップ、その後開口部を封
止する封止ステップとして作製する方法が一般的である
が、減圧槽中に芯材とロール状あるいはシート状のラミ
ネートフィルムからなる外被材を設置し、ロール状ある
いはシート状の外被材を芯材に沿わせた状態にしてから
外被材を熱融着することにより真空断熱材を作製する方
法もある。The manufacturing method of the vacuum heat insulating material is to manufacture a bag-shaped outer covering material by using one or two laminated films,
A method is generally used as a decompression step of decompressing the interior through an insertion step of inserting a core material from the opening into the outer covering material, and then a sealing step of sealing the opening, but in a decompression tank. By installing a jacket material consisting of a core material and a roll-shaped or sheet-shaped laminate film, and by heat-sealing the jacket material in a state where the roll-shaped or sheet-shaped jacket material is aligned with the core material There is also a method of producing a vacuum heat insulating material.

【００６４】また、本発明の真空断熱材は、前記芯材が
平均繊維径０．１μｍ以上１０μｍ以下の無機繊維と、
前記無機繊維に対して２０ｗｔ％以下のバインダーとか
らなるものである。In the vacuum heat insulating material of the present invention, the core material is an inorganic fiber having an average fiber diameter of 0.1 μm or more and 10 μm or less,
It is composed of 20 wt% or less of the binder with respect to the inorganic fibers.

【００６５】無機繊維は、グラスウール，グラスファイ
バー，アルミナ繊維，シリカアルミナ繊維，シリカ繊
維，ロックウール，炭化ケイ素繊維等を使用できる。As the inorganic fiber, glass wool, glass fiber, alumina fiber, silica-alumina fiber, silica fiber, rock wool, silicon carbide fiber or the like can be used.

【００６６】芯材の作製方法としては、平均繊維径０．
１μｍ以上１０μｍ以下の所定量の無機繊維を集綿し、
その集綿した無機繊維に、バインダーあるいはその希釈
液を塗布したり、あるいはバインダーあるいはその希釈
液中に無機繊維を浸漬したりすることにより、無機繊維
に対しバインダーの固形分が２０ｗｔ％以下となるよう
にバインダーを付着させる。As a method for producing the core material, an average fiber diameter of 0.
Collect a predetermined amount of inorganic fibers of 1 μm or more and 10 μm or less,
By coating the collected inorganic fibers with a binder or a diluting solution thereof, or immersing the inorganic fibers in the binder or a diluting solution thereof, the solid content of the binder becomes 20 wt% or less with respect to the inorganic fibers. So that the binder is attached.

【００６７】その後、バインダーが希釈液であればその
溶媒を必要に応じて乾燥した後、圧縮あるいは加熱圧縮
することによりボード状に成形する。Then, if the binder is a diluting liquid, the solvent is dried if necessary, and then compressed or heated and compressed to form a board.

【００６８】このとき、ボードの密度が１００ｋｇ／ｍ
3以上４００ｋｇ／ｍ3以下となるように加圧する。At this time, the density of the board is 100 kg / m.
3 above 400 kg / m 3 pressurized to become less.

【００６９】前記ボードは所定の大きさに切断して芯材
とし、外被材へ挿入する前に、水分乾燥を行ってもよ
い。The board may be cut into a predetermined size to form a core material, and may be dried with water before being inserted into the outer covering material.

【００７０】なお、芯材の密度や曲げ弾性率等の確認
は、真空断熱材を作製する前に測定する場合と、真空断
熱材作製後、外被材から芯材を取り出して測定する場合
がある。本発明では後者を基準とし、この時、密度は真
空断熱材での芯材サイズを測定し、その後外被材から芯
材を取り出して重量を測定することにより芯材密度を算
出するものとするが、大気圧縮により減圧封止前より僅
かに増加する傾向がある。また、曲げ弾性率は、外被材
から芯材を取り出して測定した時には同等か、低下する
傾向がある。The density and bending elastic modulus of the core material can be confirmed before the vacuum heat insulating material is manufactured or after the vacuum heat insulating material is manufactured and the core material is taken out from the outer covering material. is there. In the present invention, the latter is used as a reference, and at this time, the density is calculated by measuring the core material size in the vacuum heat insulating material, and then taking out the core material from the jacket material and measuring the weight. However, it tends to increase slightly due to atmospheric compression compared to before sealing under reduced pressure. Further, the flexural modulus tends to be the same or lower when the core material is taken out from the jacket material and measured.

【００７１】また、本発明では、ボード状の芯材を外被
材に挿入する際、外被材の開口部の内周長とその開口部
を通過する芯材外周長の最大部との差が０ｍｍより大き
く３０ｍｍ以下であるように余裕代をとって芯材と外被
材を作製しておく。こうしておけば芯材を外被材中に挿
入するとき、芯材が所定の曲げ弾性率以上であるため、
芯材と外被材との隙間が小さくても容易に挿入できる。Further, in the present invention, when the board-shaped core material is inserted into the outer covering material, the difference between the inner peripheral length of the opening portion of the outer covering material and the maximum portion of the outer peripheral length of the core material passing through the opening portion. The core material and the outer covering material are prepared with a margin margin so that is greater than 0 mm and less than or equal to 30 mm. In this way, when the core material is inserted into the jacket material, the core material has a predetermined bending elastic modulus or more,
It can be easily inserted even if the gap between the core material and the jacket material is small.

【００７２】また、本発明は、外被材の開口部と平行方
向における少なくとも一断面において、減圧封止後の芯
材の外周長と外被材の外周長との差が０ｍｍより大きく
７０ｍｍ以下であるように芯材と外被材を作製してお
く。Further, according to the present invention, in at least one cross section in a direction parallel to the opening of the jacket material, the difference between the outer peripheral length of the core material and the outer jacket material after decompression sealing is more than 0 mm and 70 mm or less. The core material and the outer coating material are prepared in advance.

【００７３】減圧封止後の芯材の外周長とは、相当する
外周長の長さを外被材の上から直接測定する、あるいは
相当する外周長のある２辺は外被材の上から直接測定
し、他の２辺はその厚みの近辺を外被材の上からシック
ネスゲージで測定し、それらの和を芯材外周長とする
等、測定方法は特に指定するものではない。The outer peripheral length of the core material after sealing under reduced pressure means that the length of the corresponding outer peripheral length is measured directly on the outer covering material, or the two sides having the corresponding outer peripheral length are measured on the outer covering material. The measurement method is not specified, such as direct measurement, the other two sides are measured with a thickness gauge near the thickness of the other two sides, and the sum of these is used as the outer peripheral length of the core material.

【００７４】また、外被材の外周長とは、ひれ部となる
部分も含むものである。Further, the outer peripheral length of the outer covering material includes a portion which becomes a fin portion.

【００７５】本発明の真空断熱材を、例えば冷凍冷蔵庫
の断熱壁に適用した場合、冷凍冷蔵庫の外箱と内箱とに
よって形成される空間の外箱側または内箱側に真空断熱
材を貼付しその他の空間に樹脂発泡体を充填する、ある
いは真空断熱材と発泡樹脂体とを一体発泡した断熱体を
冷凍冷蔵庫の外箱と内箱とによって形成される空間に配
設する、あるいはドア部に同様に使用する、あるいは仕
切り板に使用する等、特に指定するものではないが、機
械室と庫内を仕切る壁、あるいは冷凍室の周囲に前記真
空断熱材を用いることは、特に断熱効率に優れ、低電力
量で冷凍冷蔵庫を運転できるものである。When the vacuum heat insulating material of the present invention is applied to a heat insulating wall of a refrigerator / freezer, for example, the vacuum heat insulating material is attached to the outer box side or the inner box side of the space formed by the outer box and the inner box of the freezer refrigerator. The other space is filled with a resin foam, or a heat insulation body obtained by integrally foaming a vacuum heat insulating material and a foam resin body is arranged in a space formed by an outer box and an inner box of a refrigerator / freezer, or a door portion. It is not particularly specified whether it is used in the same manner or used as a partition plate, but using the vacuum heat insulating material around the wall that separates the machine room from the interior or around the freezing room is particularly effective in terms of heat insulation efficiency. It is excellent and can operate the refrigerator / freezer with low power consumption.

【００７６】また、樹脂発泡体とは、例えば硬質ウレタ
ンフォーム，フェノールフォームやスチレンフォームな
どを使用することができるが、特に指定するものではな
い。The resin foam may be, for example, hard urethane foam, phenol foam or styrene foam, but is not particularly specified.

【００７７】更に、これらのウレタンフォーム、例えば
硬質ウレタンフォームを発泡する際に用いる発泡剤とし
ては、特に指定するものではないが、オゾン層保護、地
球温暖化防止の観点から、シクロペンタン，イソペンタ
ン，ｎ−ペンタン，イソブタン，ｎ−ブタン，水（炭酸
ガス発泡），アゾ化合物，アルゴン等が望ましく、特に
断熱性能の点からはシクロペンタンが望ましい。Further, as a foaming agent used for foaming these urethane foams, for example, rigid urethane foams, cyclopentane, isopentane, isopentane, from the viewpoints of ozone layer protection and global warming prevention are not specified. N-pentane, isobutane, n-butane, water (foaming carbon dioxide gas), azo compound, argon and the like are preferable, and cyclopentane is particularly preferable from the viewpoint of heat insulating performance.

【００７８】また、本発明の真空断熱材はひれ部の面積
が少ないので直接冷凍機器及び冷温機器の断熱壁に適用
してもよいが、外被材中に芯材を挿入して減圧後にシー
ルをした部分等についてはひれ部が残っていることもあ
るので、必要に応じてひれ部を折り曲げて使用してもよ
い。Further, since the vacuum heat insulating material of the present invention has a small fin area, it may be directly applied to a heat insulating wall of a refrigerating machine or a cold machine, but a core material is inserted into an outer covering material and sealed after decompression. Since the fin portion may remain in the part or the like that is formed, the fin portion may be bent and used as necessary.

【００７９】また、冷凍サイクルを有する冷凍機器及び
冷温機器に使用する冷媒は、フロン１３４ａ，イソブタ
ン，ｎ−ブタン，プロパン，アンモニア，二酸化炭素，
水等、特に指定するものではない。Refrigerants used in refrigeration equipment and refrigeration equipment having a refrigeration cycle include Freon 134a, isobutane, n-butane, propane, ammonia, carbon dioxide,
Water, etc. are not specified.

【００８０】なお、冷凍機器及び冷温機器とは、動作温
度帯である−３０℃から常温、あるいは１００℃程度ま
でで断熱を必要とする機器の代表として示したものであ
り、一般的な冷凍冷蔵庫に加え、電子冷却を利用した冷
蔵庫や保冷車等があり、あるいは自動販売機，ジャーポ
ット，炊飯器等の、より高温までの範囲で温冷熱を利用
した冷温機器を指す。The refrigerating machine and the cold / warm machine are representative of machines that require heat insulation in the operating temperature range of -30 ° C to room temperature, or about 100 ° C. In addition, there are refrigerators and cold storage cars that use electronic cooling, or vending machines, jar pots, rice cookers, and other cold and hot devices that use hot and cold heat up to a higher temperature range.

【００８１】また、ガス機器、あるいはクーラーボック
ス等動力を必要としない機器も含むものである。It also includes gas equipment or equipment that does not require power such as a cooler box.

【００８２】さらには、パソコンの内部発熱の断熱に対
して使用することも可能である。Furthermore, it can also be used for heat insulation of the internal heat generation of a personal computer.

【００８３】以下、本発明の実施の形態について図を参
照しながら詳細に説明する。Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

【００８４】なお、実施の形態１から実施の形態４につ
いては外観及び内部形状とも同一であるため、図１から
図３及びそれらの符号は同一のものを使用する。Since the first embodiment to the fourth embodiment have the same external appearance and internal shape, the same reference numerals are used in FIGS. 1 to 3 and their reference numerals.

【００８５】（実施の形態１）図１は本発明の実施の形
態における真空断熱材の斜視図であり、図２は図１のＡ
−Ａ断面図、図３は外被材の斜視図で真空断熱材の芯材
を挿入する前の状態である。(Embodiment 1) FIG. 1 is a perspective view of a vacuum heat insulating material according to an embodiment of the present invention, and FIG.
3A is a cross-sectional view of FIG. 3 and is a perspective view of a jacket material in a state before the core material of the vacuum heat insulating material is inserted.

【００８６】図１から図３において、１は真空断熱材で
あり、２は外被材、３は芯材でボード状に成形したもの
である。外被材２は、２枚のラミネートフィルムを三方
シールにて製袋し、芯材３をＡ−Ａ断面と垂直な方向に
ある開口部４から挿入したのち、内部を減圧して開口部
４を熱溶着により密封されている。５はひれ部で芯材が
なく、熱溶着部６と余裕代の一部が減圧により密着した
密着部６Ａよりなる。In FIGS. 1 to 3, 1 is a vacuum heat insulating material, 2 is a jacket material, and 3 is a core material formed into a board shape. The outer covering material 2 is formed by bag-making two laminated films with a three-sided seal, and after inserting the core material 3 from the opening 4 in the direction perpendicular to the AA cross section, the inside pressure is reduced to form the opening 4 Are sealed by heat welding. Reference numeral 5 denotes a fin portion, which has no core material, and is composed of a heat-welded portion 6 and a contact portion 6A in which a part of a margin is in contact with each other due to a reduced pressure.

【００８７】７はＡ−Ａ断面における芯材外周長であ
り、８は外被材外周長である。Ａ−Ａ断面の位置は、外
被材２の開口部４と平行方向の一断面における芯材外周
長７の最大部とするが、本実施の形態では芯材３はほぼ
直方体であり、したがってＡ−Ａ断面の位置は任意であ
る。Reference numeral 7 is the outer peripheral length of the core material in the AA cross section, and 8 is the outer peripheral length of the jacket material. The position of the AA cross section is the maximum portion of the core material outer peripheral length 7 in one cross section in the direction parallel to the opening 4 of the jacket material 2, but in the present embodiment, the core material 3 is a substantially rectangular parallelepiped, and therefore, The position of the AA cross section is arbitrary.

【００８８】外被材２を構成する２枚のラミネートフィ
ルムのうち、１枚は熱融着層として高密度ポリエチレン
（以下ＨＤＰＥと称する）フィルムが５０μｍ、ガスバ
リア層として厚み１５μｍのＥＶＯＨに膜厚５００Åの
アルミ蒸着を形成したフィルムと、厚み１２μｍのＰＥ
Ｔに５００Åのアルミ蒸着を形成したフィルムをアルミ
蒸着面同士貼り合わせたフィルムからなり、熱融着層の
ＨＤＰＥとガスバリア層のＥＶＯＨをドライラミネート
している。他の１枚は、熱融着層は厚み５０μｍのＨＤ
ＰＥ、その上にガスバリア層として厚み６μｍのアルミ
箔、さらに保護層として厚み１２μｍのＰＥＴ，最外層
として厚み１２μｍのナイロンにより構成されている。Of the two laminated films constituting the jacket material 2, one is a high-density polyethylene (hereinafter referred to as HDPE) film having a thickness of 50 μm as a heat-sealing layer, and a gas barrier layer having a thickness of 500 Å on an EVOH having a thickness of 15 μm. Film with aluminum vapor deposition and PE with a thickness of 12 μm
It consists of a film in which aluminum is vapor-deposited on T at a thickness of 500Å and the aluminum vapor-deposited surfaces are bonded together, and HDPE as a heat-sealing layer and EVOH as a gas barrier layer are dry-laminated. For the other one, the heat fusion layer is HD with a thickness of 50 μm.
PE, a 6 μm thick aluminum foil as a gas barrier layer thereon, a 12 μm thick PET as a protective layer, and a 12 μm thick nylon as an outermost layer.

【００８９】芯材３は、平均繊維径１０μｍのグラスウ
ールの集綿材に対し、バインダーとしてフェノール樹脂
水溶液の固形分が２０ｗｔ％となるように噴霧装置にて
均一に塗布し、その後２７０℃の熱風循環炉の中で密度
が４００ｋｇ／ｍ3となるように１０分間プレスしてボ
ード状に成形した。The core material 3 was uniformly applied to a cotton wool collecting material having an average fiber diameter of 10 μm by a spraying device so that the solid content of the phenol resin aqueous solution as a binder would be 20 wt%, and then hot air at 270 ° C. It was pressed in a circulating furnace for 10 minutes so as to have a density of 400 kg / m 3 and formed into a board shape.

【００９０】このように作製した芯材３の曲げ弾性率を
ＪIＳ規格Ｋ７１７１に準拠して測定したところ、７Ｍ
Ｐａであった。The bending elastic modulus of the core material 3 thus manufactured was measured according to JIS K7171.
It was Pa.

【００９１】このボード状の芯材３を３００ｍｍ×３０
０ｍｍ×１５ｍｍに切断した。This board-shaped core material 3 is 300 mm × 30
It was cut into 0 mm × 15 mm.

【００９２】本実施の形態１における、外被材２へ挿入
する前の芯材外周長７は６３０ｍｍであり、これに対し
て外被材２の開口部４の内周長は余裕代を２０ｍｍとっ
て６５０ｍｍとし、外被材外周長８は開口部４の内周長
に対し、熱溶着のためのシール幅１０ｍｍ×４を加えて
６９０ｍｍとなるように作製して製袋した。In the first embodiment, the outer peripheral length 7 of the core material before being inserted into the outer jacket material 2 is 630 mm, whereas the inner peripheral length of the opening 4 of the outer jacket material 2 has a margin of 20 mm. The outer peripheral length 8 was 650 mm, and the outer peripheral length 8 was 690 mm obtained by adding a seal width of 10 mm × 4 for heat welding to the inner peripheral length of the opening 4.

【００９３】こうして作製した外被材２の中に、芯材３
を１４０℃の乾燥炉で１時間乾燥したのち挿入し、内部
を１０Ｐａまで減圧して開口部４を熱溶着により封止し
た。The core material 3 is placed in the outer covering material 2 thus produced.
Was dried in a drying oven at 140 ° C. for 1 hour and then inserted, the inside pressure was reduced to 10 Pa, and the opening 4 was sealed by heat welding.

【００９４】以上のようにして作製した真空断熱材１の
熱伝導率は、平均温度２４℃にて０．００４Ｗ／ｍＫで
あった。The thermal conductivity of the vacuum heat insulating material 1 produced as described above was 0.004 W / mK at an average temperature of 24 ° C.

【００９５】また、芯材３は減圧封止後、大気圧縮によ
り厚みは１４.５ｍｍとなり、芯材外周長は６２９ｍｍ
となった。この時の芯材３の密度は４１３ｋｇ／ｍ3と
なる。The core material 3 has a thickness of 14.5 mm due to atmospheric compression after being vacuum-sealed, and has a peripheral length of 629 mm.
Became. At this time, the density of the core material 3 is 413 kg / m 3 .

【００９６】また、経時信頼性を確認するため加速試験
による断熱材の劣化を評価したが、１０年経過条件での
熱伝導率は平均温度２４℃にて０．０１７Ｗ／ｍＫであ
った。更に、真空断熱材を解体して芯材を取り出し、曲
げ弾性率を測定すると６．５ＭＰａであった。Further, the deterioration of the heat insulating material was evaluated by an acceleration test in order to confirm the reliability over time, but the thermal conductivity under the condition of 10 years elapsed was 0.017 W / mK at an average temperature of 24 ° C. Further, the vacuum heat insulating material was disassembled, the core material was taken out, and the flexural modulus was measured and found to be 6.5 MPa.

【００９７】すなわち、真空断熱材として減圧後も曲げ
弾性率６．５ＭＰａを保持するボード状芯材を適用した
ことにより、芯材外周長と外被材開口部の内周長との差
をできる限り小さくしても、芯材を外被材中に挿入する
際にも芯材が変形することもなくスムーズに挿入可能で
あり、挿入時に外被材に削られる芯材のへり部の粉等に
より外被材のシールが阻害されることもなかった。That is, by applying a board-shaped core material that holds the flexural modulus of 6.5 MPa even after decompression as the vacuum heat insulating material, the difference between the outer peripheral length of the core material and the inner peripheral length of the opening of the outer covering material can be obtained. Even if it is made as small as possible, it can be smoothly inserted even when inserting the core material into the outer covering material without deforming the core material. This did not hinder the sealing of the jacket material.

【００９８】（実施の形態２）外被材２は、実施の形態
１にて使用した外被材と同一の構成及び形状である。(Second Embodiment) The jacket material 2 has the same structure and shape as the jacket material used in the first embodiment.

【００９９】芯材３は、平均繊維径４．５μｍのグラス
ウールの集綿材に対し、バインダーとしてフェノール樹
脂の固形分が１０ｗｔ％となるような希釈水溶液中に集
綿材を浸漬することによりグラスウールに均一に塗布
し、その後２７０℃のホットプレス装置にて密度が２５
０ｋｇ／ｍ3となるように１０分間プレスしてボード状
に成形した。The core material 3 is obtained by immersing the cotton wool in a dilute aqueous solution in which the solid content of the phenol resin as the binder is 10 wt% with respect to the cotton wool in which the average fiber diameter is 4.5 μm. On a hot press machine at 270 ° C.
It was pressed for 10 minutes so as to be 0 kg / m 3 and formed into a board shape.

【０１００】このように作製した芯材３の曲げ弾性率を
実施の形態１と同じ方法で測定すると、４ＭＰａであっ
た。The bending elastic modulus of the core material 3 thus produced was measured by the same method as in the first embodiment and found to be 4 MPa.

【０１０１】この芯材３を実施の形態１と同様に処理し
て真空断熱材１を作製した。This core material 3 was processed in the same manner as in the first embodiment to produce the vacuum heat insulating material 1.

【０１０２】以上のような真空断熱材１の熱伝導率は、
平均温度２４℃にて０．００３５Ｗ／ｍＫであった。The thermal conductivity of the vacuum heat insulating material 1 as described above is
The average temperature was 0.0035 W / mK at 24 ° C.

【０１０３】また、芯材３は減圧封止後、大気圧縮によ
り厚みは１４ｍｍとなり、芯材外周長は６２８ｍｍとな
った。この時の芯材３の密度は２６７ｋｇ／ｍ3とな
る。The core material 3 was sealed under reduced pressure and then compressed to the atmosphere to have a thickness of 14 mm and an outer peripheral length of 628 mm. At this time, the density of the core material 3 is 267 kg / m 3 .

【０１０４】また、経時信頼性を確認するため加速試験
による断熱材の劣化を評価したが、１０年経過条件での
熱伝導率は平均温度２４℃にて０．０１６Ｗ／ｍＫであ
った。更に、真空断熱材を解体して芯材を取り出し、曲
げ弾性率を測定すると３．５ＭＰａであった。In order to confirm the reliability over time, the deterioration of the heat insulating material was evaluated by an acceleration test, but the thermal conductivity under the condition of 10 years elapsed was 0.016 W / mK at an average temperature of 24 ° C. Furthermore, the vacuum heat insulating material was disassembled, the core material was taken out, and the flexural modulus was measured and found to be 3.5 MPa.

【０１０５】すなわち、真空断熱材として減圧後も曲げ
弾性率３．５ＭＰａを保持するボード状芯材であれば、
芯材を外被材中に挿入する際にも芯材が変形することも
なくスムーズに挿入可能であり、挿入時に外被材に削ら
れる芯材のへり部の粉等により外被材のシールが阻害さ
れることもなかった。That is, as long as it is a board-shaped core material that holds the flexural modulus of 3.5 MPa even after decompression as a vacuum heat insulating material,
Even when inserting the core material into the outer covering material, the core material can be inserted smoothly without deformation, and the outer covering material is sealed by the powder of the edge of the core material that is shaved by the outer covering material at the time of insertion. Was not hindered.

【０１０６】更に、実施の形態１記載の真空断熱材と比
較して、グラスウールの繊維径を小さくし、また密度を
適正化することにより、初期熱伝導率を低減することが
できた。Further, as compared with the vacuum heat insulating material described in the first embodiment, the initial thermal conductivity could be reduced by reducing the fiber diameter of glass wool and optimizing the density.

【０１０７】（実施の形態３）外被材２は、実施の形態
１にて使用した外被材と同一の構成及び形状である。(Embodiment 3) The jacket material 2 has the same structure and shape as the jacket material used in the first embodiment.

【０１０８】芯材３は、平均繊維径０．１μｍのグラス
ウールの集綿材に対し、バインダーとしてフェノール樹
脂の固形分が１ｗｔ％となるような希釈水溶液中に集綿
材を浸漬することによりグラスウールに均一に塗布し、
その後２７０℃のホットプレス装置にて密度が１００ｋ
ｇ／ｍ3となるように１０分間プレスしてボード状に成
形した。The core material 3 is formed by immersing the cotton wool in a dilute aqueous solution in which the solid content of the phenol resin as the binder is 1 wt% with respect to the cotton wool in which the average fiber diameter is 0.1 μm. Evenly,
After that, the density is 100k in a hot press machine at 270 ° C.
It was pressed for 10 minutes so as to be g / m 3 and formed into a board shape.

【０１０９】このように作製した芯材３の曲げ弾性率を
実施の形態１と同じ方法で測定すると、０．５ＭＰａで
あった。The bending elastic modulus of the core material 3 thus manufactured was 0.5 MPa when measured by the same method as in the first embodiment.

【０１１０】この芯材３を実施の形態１と同様に処理し
て真空断熱材１を作製した。以上のような真空断熱材１
の熱伝導率は、平均温度２４℃にて０．００３Ｗ／ｍＫ
であった。This core material 3 was processed in the same manner as in Embodiment 1 to produce a vacuum heat insulating material 1. Vacuum insulation material 1 as above
Has a thermal conductivity of 0.003 W / mK at an average temperature of 24 ° C.
Met.

【０１１１】また、芯材３は減圧封止後、大気圧縮によ
り厚みは１３．５ｍｍとなり、芯材外周長は６２７ｍｍ
となった。この時の芯材３の密度は１１０ｋｇ／ｍ3と
なる。The core material 3 has a thickness of 13.5 mm due to atmospheric compression after pressure reduction sealing, and has a core material outer peripheral length of 627 mm.
Became. At this time, the density of the core material 3 is 110 kg / m 3 .

【０１１２】また、経時信頼性を確認するため加速試験
による断熱材の劣化を評価したが、１０年経過条件での
熱伝導率は平均温度２４℃にて０．０１６Ｗ／ｍＫであ
った。更に、真空断熱材を解体して芯材を取り出し、曲
げ弾性率を測定すると０．２ＭＰａであった。In order to confirm the reliability over time, the deterioration of the heat insulating material was evaluated by an acceleration test, but the thermal conductivity under the conditions of 10 years was 0.016 W / mK at an average temperature of 24 ° C. Further, the vacuum heat insulating material was disassembled, the core material was taken out, and the bending elastic modulus was measured and found to be 0.2 MPa.

【０１１３】すなわち、真空断熱材として減圧後も曲げ
弾性率０．２ＭＰａを保持するボード状芯材であれば、
芯材を外被材中に挿入する際にも芯材が変形することも
なくスムーズに挿入可能であり、挿入時に外被材に削ら
れる芯材のへり部の粉等により外被材のシールが阻害さ
れることもなかった。That is, as long as it is a board-shaped core material that holds the flexural modulus of 0.2 MPa even after decompression as a vacuum heat insulating material,
Even when inserting the core material into the outer covering material, the core material can be inserted smoothly without deformation, and the outer covering material is sealed by the powder of the edge of the core material that is shaved by the outer covering material at the time of insertion. Was not hindered.

【０１１４】更に、実施の形態２記載の真空断熱材と比
較して、グラスウールの繊維径を小さくすることによ
り、初期熱伝導率をより低減することができた。Further, as compared with the vacuum heat insulating material described in the second embodiment, the initial thermal conductivity could be further reduced by reducing the fiber diameter of the glass wool.

【０１１５】（実施の形態４）外被材２は、実施の形態
１にて使用した外被材と同一の構成及び形状である。(Embodiment 4) The jacket material 2 has the same structure and shape as the jacket material used in the first embodiment.

【０１１６】芯材３は、平均繊維径４．５μｍのグラス
ウールの集綿材に対し、バインダーとしてコロイダルシ
リカの固形分が１０ｗｔ％となるように噴霧装置にて均
一に塗布し、その後３８５℃の熱風循環炉の中で密度が
２５０ｋｇ／ｍ3となるように１５分間プレスしてボー
ド状に成形した。The core material 3 was uniformly applied to a cotton wool collecting material having an average fiber diameter of 4.5 μm by a spraying device so that the solid content of colloidal silica as a binder would be 10 wt%, and then at 385 ° C. It was pressed for 15 minutes in a hot air circulation furnace to a density of 250 kg / m 3 to form a board.

【０１１７】このように作製した芯材３の曲げ弾性率を
実施の形態１と同じ方法で測定すると、３ＭＰａであっ
た。The bending elastic modulus of the core material 3 thus produced was measured by the same method as in the first embodiment and found to be 3 MPa.

【０１１８】この芯材３を実施の形態１と同様に処理し
て真空断熱材１を作製した。This core material 3 was processed in the same manner as in Embodiment 1 to produce a vacuum heat insulating material 1.

【０１１９】以上のような真空断熱材１Ｃの熱伝導率
は、平均温度２４℃にて０．００２５Ｗ／ｍＫであっ
た。The thermal conductivity of the vacuum heat insulating material 1C as described above was 0.0025 W / mK at an average temperature of 24 ° C.

【０１２０】また、芯材３は減圧封止後、大気圧縮によ
り厚みは１４ｍｍとなり、芯材外周長は６２８ｍｍとな
った。この時の芯材３の密度は２６７ｋｇ／ｍ3とな
る。The core material 3 was sealed under reduced pressure and then compressed to the atmosphere to have a thickness of 14 mm and a core material outer peripheral length of 628 mm. At this time, the density of the core material 3 is 267 kg / m 3 .

【０１２１】また、経時信頼性を確認するため加速試験
による断熱材の劣化を評価したが、１０年経過条件での
熱伝導率は平均温度２４℃にて０．００９Ｗ／ｍＫであ
った。更に、真空断熱材を解体して芯材を取り出し、曲
げ弾性率を測定すると１ＭＰａであった。Further, the deterioration of the heat insulating material was evaluated by an acceleration test in order to confirm the reliability over time, but the thermal conductivity under the condition of 10 years elapsed was 0.009 W / mK at an average temperature of 24 ° C. Further, the vacuum heat insulating material was disassembled, the core material was taken out, and the flexural modulus was measured and found to be 1 MPa.

【０１２２】すなわち、真空断熱材として減圧後も曲げ
弾性率１ＭＰａを保持するボード状芯材であれば、芯材
を外被材中に挿入する際にも芯材が変形することもなく
スムーズに挿入可能であり、実施の形態２記載の真空断
熱材と比較して、バインダーとしてコロイダルシリカを
用いたことにより、経時信頼性を大幅に向上することが
できた。That is, if the board-shaped core material is used as the vacuum heat insulating material and retains the bending elastic modulus of 1 MPa even after decompression, the core material is smoothly deformed even when it is inserted into the jacket material. It can be inserted, and as compared with the vacuum heat insulating material described in the second embodiment, the use of colloidal silica as a binder can significantly improve the reliability over time.

【０１２３】（実施の形態５）図４は本発明の実施の形
態５における真空断熱材の斜視図であり、図５は図４の
Ｂ−Ｂ断面図、図６は外被材の斜視図で真空断熱材の芯
材を挿入する前の状態である。(Fifth Embodiment) FIG. 4 is a perspective view of a vacuum heat insulating material according to a fifth embodiment of the present invention. FIG. 5 is a sectional view taken along the line BB of FIG. 4, and FIG. 6 is a perspective view of a jacket material. In the state before inserting the core material of the vacuum heat insulating material.

【０１２４】図４から図６において、１Ａは真空断熱材
であり、２Ａは外被材、３Ａはボード状の芯材３であ
る。外被材２Ａは、１枚のラミネートフィルムをピロー
製袋し、芯材３ＡをＢ−Ｂ断面と垂直な方向にある開口
部４Ａから挿入したのち、内部を減圧して開口部４を熱
溶着により密封されている。4 to 6, 1A is a vacuum heat insulating material, 2A is a jacket material, and 3A is a board-shaped core material 3. For the outer covering material 2A, one laminated film is formed into a pillow bag, the core material 3A is inserted through the opening 4A in the direction perpendicular to the BB cross section, and then the inside is depressurized to heat-weld the opening 4 It is sealed by.

【０１２５】７ＡはＢ−Ｂ断面における芯材外周長であ
り、８Ａは外被材外周長である。Ｂ−Ｂ断面の位置は、
外被材２Ａの開口部４Ａと平行方向の一断面における芯
材外周長７Ａの最大部とするが、本実施の形態では芯材
３Ａはほぼ直方体であり、したがってＢ−Ｂ断面の位置
は任意である。7A is the outer peripheral length of the core material in the BB cross section, and 8A is the outer peripheral length of the jacket material. The position of the BB cross section is
The maximum length of the core material outer peripheral length 7A in one cross section in the direction parallel to the opening 4A of the jacket material 2A is set. Is.

【０１２６】外被材２Ａのラミネートフィルムは、熱融
着層は厚み５０μｍのＨＤＰＥ、その上にガスバリア層
として厚み６μｍのアルミ箔、さらに保護層として厚み
１２μｍのＰＥＴ，最外層として厚み１２μｍのナイロ
ンにより構成されている。The laminate film of the outer coating material 2A was made of HDPE having a thickness of 50 μm as a heat-sealing layer, aluminum foil having a thickness of 6 μm as a gas barrier layer, PET having a thickness of 12 μm as a protective layer, and nylon having a thickness of 12 μm as an outermost layer. It is composed by.

【０１２７】芯材３Ａは、平均繊維径４．５μｍのグラ
スウールの集綿材に対し、コロイダルシリカの固形分が
１０ｗｔ％となるような希釈水溶液に集綿材を浸漬する
ことによりグラスウールにバインダーを均一に塗布し、
その後４００℃のホットプレス装置にて密度が２５０ｋ
ｇ／ｍ3となるように１０分間プレスしてボード状に成
形した。The core material 3A was prepared by immersing the cotton wool in a dilute aqueous solution such that the solid content of colloidal silica was 10 wt% with respect to the cotton wool in which the average fiber diameter was 4.5 μm. Apply evenly,
After that, with a hot press machine at 400 ° C, the density is 250k.
It was pressed for 10 minutes so as to be g / m 3 and formed into a board shape.

【０１２８】このように作製した芯材３Ａの曲げ弾性率
を実施の形態１と同じ方法で測定すると、３ＭＰａであ
った。The bending elastic modulus of the core material 3A thus manufactured was 3 MPa when measured by the same method as in the first embodiment.

【０１２９】このボード状の芯材３Ａを３００ｍｍ×３
００ｍｍ×１５ｍｍに切断した。This board-shaped core material 3A is 300 mm × 3
It was cut into 00 mm × 15 mm.

【０１３０】本実施の形態５における、外被材に挿入す
る前の芯材外周長７Ａは６３０ｍｍであり、これに対し
て外被材２Ａの開口部４Ａの内周長は余裕代を２０ｍｍ
とって６５０ｍｍとし、外被材外周長８Ａは開口部４Ａ
の内周長に対し、熱溶着のためのシール幅１０ｍｍ×２
を加えた６７０ｍｍとなるように外被材２Ａを作製して
製袋した。In the fifth embodiment, the outer peripheral length 7A of the core material before being inserted into the outer covering material is 630 mm, whereas the inner peripheral length of the opening 4A of the outer covering material 2A has a margin of 20 mm.
The outer peripheral length of the outer jacket material is 8A and the opening is 4A.
Seal width for heat welding is 10mm x 2 with respect to inner circumference of
The outer covering material 2A was manufactured so as to have a thickness of 670 mm, and the bag was manufactured.

【０１３１】こうして作製した外被材２Ａの中に、芯材
３Ａを１４０℃の乾燥炉で１時間乾燥したのち挿入し、
内部を１０Ｐａまで減圧して開口部４Ａを熱溶着により
封止した。The core material 3A was dried in a drying oven at 140 ° C. for 1 hour and then inserted into the thus prepared outer coating material 2A.
The inside pressure was reduced to 10 Pa and the opening 4A was sealed by heat welding.

【０１３２】以上のようにして作製した真空断熱材１Ａ
の熱伝導率は、平均温度２４℃にて０．００２５Ｗ／ｍ
Ｋであった。Vacuum heat insulating material 1A produced as described above
Has a thermal conductivity of 0.0025 W / m at an average temperature of 24 ° C.
It was K.

【０１３３】また、芯材３Ａは減圧封止後、大気圧縮に
より厚みは１４ｍｍとなり、芯材外周長は６２８ｍｍと
なった。この時の芯材３Ａの密度は２６７ｋｇ／ｍ3と
なる。The core material 3A was vacuum-sealed and then compressed in the atmosphere to have a thickness of 14 mm and an outer peripheral length of 628 mm. At this time, the density of the core material 3A is 267 kg / m 3 .

【０１３４】また、経時信頼性を確認するため加速試験
による断熱材の劣化を評価したが、１０年経過条件での
熱伝導率は平均温度２４℃にて０．００８Ｗ／ｍＫであ
った。更に、真空断熱材を解体して芯材を取り出し、曲
げ弾性率を測定すると１ＭＰａであった。Further, the deterioration of the heat insulating material was evaluated by an acceleration test in order to confirm the reliability over time, but the thermal conductivity under the condition of 10 years elapsed was 0.008 W / mK at an average temperature of 24 ° C. Further, the vacuum heat insulating material was disassembled, the core material was taken out, and the flexural modulus was measured and found to be 1 MPa.

【０１３５】すなわち、芯材３Ａを外被材２Ａに挿入す
るときの問題もなく、実施の形態４記載の真空断熱材と
比較して、シール部を減少させたことにより経時信頼性
が向上した。That is, there is no problem when the core material 3A is inserted into the jacket material 2A, and the reliability over time is improved by reducing the seal portion as compared with the vacuum heat insulating material described in the fourth embodiment. .

【０１３６】また、芯材外周長と外被材内周長および外
被材外周長の関係を適正化し、真空断熱材のひれ部が２
側面において削減できたことにより、有効断熱面積が向
上したとともに、冷凍機器及び冷温機器に適用する際に
ひれ部を処理する工程が削減できた。Further, the relationship between the outer peripheral length of the core material and the inner peripheral length of the outer covering material and the outer peripheral length of the outer covering material is optimized so that the fin portion of the vacuum heat insulating material is two.
The reduction in the side surface has improved the effective heat insulation area, and has also reduced the process of treating the fins when applied to refrigeration equipment and cooling / heating equipment.

【０１３７】（実施の形態６）図７は本発明の実施の形
態６における真空断熱材の斜視図であり、図８は図７の
Ｃ−Ｃ断面図、図９は外被材の斜視図で真空断熱材の芯
材を挿入する前の状態である。(Sixth Embodiment) FIG. 7 is a perspective view of a vacuum heat insulating material according to a sixth embodiment of the present invention, FIG. 8 is a sectional view taken along line CC of FIG. 7, and FIG. 9 is a perspective view of a jacket material. In the state before inserting the core material of the vacuum heat insulating material.

【０１３８】図７から図９において、１Ｂは真空断熱材
であり、２Ｂは外被材、３Ｂはボード状の芯材である。
外被材２Ｂは、１枚のラミネートフィルム２Ｃ及び幅４
００ｍｍのリボン状フィルム２Ｄ（図８、図９斜線部）
を用いてセンターテープシール袋として製袋し、芯材３
ＢをＣ−Ｃ断面と垂直な方向にある開口部４Ｂから挿入
したのち、内部を減圧して開口部４Ｂを熱溶着により密
封されている。7 to 9, 1B is a vacuum heat insulating material, 2B is a jacket material, and 3B is a board-shaped core material.
The outer covering material 2B is composed of one laminated film 2C and width 4
Ribbon-shaped film 2D of 00 mm (shaded areas in FIGS. 8 and 9)
Made into a center tape seal bag using
After B is inserted through the opening 4B in the direction perpendicular to the CC cross section, the inside pressure is reduced and the opening 4B is sealed by heat welding.

【０１３９】７ＢはＣ−Ｃ断面における芯材外周長であ
り、８Ｂは外被材外周長である。Ｃ−Ｃ断面の位置は、
外被材２Ｂの開口部４Ｂと平行方向の一断面における芯
材外周長７Ｂの最大部とするが、本実施の形態では芯材
３Ｂはほぼ直方体であり、したがってＣ−Ｃ断面の位置
は任意である。7B is the outer peripheral length of the core material in the CC cross section, and 8B is the outer peripheral length of the jacket material. The position of the C-C cross section is
Although the maximum length of the core material outer peripheral length 7B in one cross section in the direction parallel to the opening 4B of the jacket material 2B, the core material 3B is a substantially rectangular parallelepiped in the present embodiment, and therefore the position of the CC cross section is arbitrary. Is.

【０１４０】外被材２Ｂにおいて、ラミネートフィルム
２Ｃは熱融着層として鎖状低密度ポリエチレン（以下Ｌ
ＬＤＰＥと称す）フィルムが５０μｍ、ガスバリア層と
して厚み６μｍのアルミ箔、さらに保護層として厚み１
２μｍのＰＥＴにより構成されており、リボン状フィル
ム２Ｄは、ラミネートフィルム２ＣのＰＥＴの上にさら
にＬＬＤＰＥをラミネートしており、図９に示すように
製袋している。In the covering material 2B, the laminate film 2C is a chain low density polyethylene (hereinafter referred to as L
LDPE film is 50 μm, gas barrier layer is 6 μm thick aluminum foil, and protective layer is 1 μm thick.
The ribbon-shaped film 2D is made of PET having a thickness of 2 μm, and LLDPE is further laminated on the PET of the laminated film 2C to form a bag as shown in FIG.

【０１４１】芯材３Ｂは平均繊維径４．５μｍのグラス
ウールの集綿材に対し、バインダーとしてコロイダルシ
リカ水溶液の固形分が１０ｗｔ％となるように噴霧装置
にて均一に塗布し、その後４００℃のホットプレスにて
密度が２５０ｋｇ／ｍ3となるように１０分間プレスし
てボード状に成形した。The core material 3B was uniformly applied to a cotton wool collecting material having an average fiber diameter of 4.5 μm by a spraying device so that the solid content of the colloidal silica aqueous solution as a binder would be 10 wt%, and then at 400 ° C. It was pressed by a hot press for 10 minutes so that the density was 250 kg / m 3, and was formed into a board shape.

【０１４２】このように作製した芯材３Ｂの曲げ弾性率
を実施の形態１と同じ方法で測定すると、３ＭＰａであ
った。The bending elastic modulus of the core material 3B thus produced was measured by the same method as in the first embodiment and found to be 3 MPa.

【０１４３】このボード状の芯材３Ｂを３００ｍｍ×３
００ｍｍ×１５ｍｍに切断した。This board-shaped core material 3B is 300 mm × 3
It was cut into 00 mm × 15 mm.

【０１４４】本実施の形態６における、外被材へ挿入す
る前の芯材外周長７Ｂは６３０ｍｍであり、これに対し
て外被材２Ｂの開口部４Ｂの内周長は余裕代を２０ｍｍ
とって６５０ｍｍとし、外被材外周長８Ｂもひれ部が存
在しないので６５０ｍｍとなるようにリボン状フィルム
２Ｄで両端を溶着して外被材２Ｂを袋状に作製した。In the sixth embodiment, the outer peripheral length 7B of the core material before being inserted into the outer covering material is 630 mm, whereas the inner peripheral length of the opening 4B of the outer covering material 2B is 20 mm in the margin.
Since the outer peripheral length 8B of the outer jacket material is 650 mm and there is no fin portion, both ends of the outer jacket material 2B are welded with the ribbon film 2D so that the outer jacket material 2B has a bag shape.

【０１４５】こうして作製した外被材２Ｂの中に、芯材
３Ｂを１４０℃の乾燥炉で１時間乾燥したのち吸着剤９
とともに挿入し、内部を１０Ｐａまで減圧しして開口部
４Ｂを熱溶着により封止した。The core material 3B was dried in a drying oven at 140 ° C. for 1 hour in the thus prepared outer coating material 2B, and then the adsorbent 9 was used.
Then, the inside was decompressed to 10 Pa and the opening 4B was sealed by heat welding.

【０１４６】吸着剤９は、酸化カルシウムからなる水分
吸着剤であり、通気性のある袋に封入されている。The adsorbent 9 is a water adsorbent made of calcium oxide, and is enclosed in a breathable bag.

【０１４７】以上のような真空断熱材１Ｂの熱伝導率
は、平均温度２４℃にて０．００２５Ｗ／ｍＫであっ
た。The thermal conductivity of the vacuum heat insulating material 1B as described above was 0.0025 W / mK at an average temperature of 24 ° C.

【０１４８】また、芯材３Ｂは減圧封止後、大気圧縮に
より厚みは１４ｍｍとなり、芯材外周長は６２８ｍｍと
なった。この時の芯材３Ｂの密度は２６７ｋｇ／ｍ3と
なる。The core material 3B was vacuum-sealed and then compressed in the atmosphere to have a thickness of 14 mm and an outer peripheral length of 628 mm. At this time, the density of the core material 3B is 267 kg / m 3 .

【０１４９】また、経時信頼性を確認するため加速試験
による断熱材の劣化を評価したが、１０年経過条件での
熱伝導率は平均温度２４℃にて０．００６Ｗ／ｍＫであ
った。更に、真空断熱材を解体して芯材を取り出し、曲
げ弾性率を測定すると１ＭＰａであった。Further, the deterioration of the heat insulating material was evaluated by an acceleration test in order to confirm the reliability over time, but the thermal conductivity under the condition of 10 years elapsed was 0.006 W / mK at an average temperature of 24 ° C. Further, the vacuum heat insulating material was disassembled, the core material was taken out, and the flexural modulus was measured and found to be 1 MPa.

【０１５０】すなわち、芯材３Ｂを外被材２Ｂに挿入す
るときの問題もなく、実施の形態４記載の真空断熱材と
比較して、シール部を減少させ、吸着剤を適用したこと
により経時信頼性が向上した。That is, there is no problem when the core material 3B is inserted into the outer covering material 2B, and compared with the vacuum heat insulating material described in the fourth embodiment, the sealing portion is reduced and the adsorbent is applied, so that the time elapses. Improves reliability.

【０１５１】また、芯材外周長と外被材の開口部の内周
長及び外被材外周長の関係を適正化してセンターテープ
シール袋としたことにより真空断熱材のひれ部を２側面
及び上部において削減したことにより、有効断熱面積が
向上したとともに、冷凍機器及び冷温機器に適用する際
にひれ部を処理する工程が削減できた。Further, the center tape seal bag is formed by optimizing the relationship between the outer peripheral length of the core material and the inner peripheral length of the opening of the outer covering material and the outer peripheral length of the outer covering material. Due to the reduction in the upper part, the effective heat insulation area was improved, and the process of treating the fin portion when applied to the refrigeration equipment and the cooling / heating equipment was reduced.

【０１５２】（実施の形態７）図１０は本発明の実施の
形態７における冷凍冷蔵庫の縦断面図である。(Embodiment 7) FIG. 10 is a vertical sectional view of a refrigerator-freezer according to Embodiment 7 of the present invention.

【０１５３】冷凍冷蔵庫１０は、鋼板からなる外箱１１
と、ＡＢＳ樹脂からなる内箱１２とによって形成される
空間に実施の形態６に示した真空断熱材１Ｂを配設し、
真空断熱材１Ｂ以外の残りの空間に硬質ウレタンフォー
ム１３を発泡充填している。The refrigerator-freezer 10 has an outer box 11 made of steel plate.
And the vacuum heat insulating material 1B shown in the sixth embodiment in a space formed by the inner box 12 made of ABS resin,
Hard urethane foam 13 is foam-filled in the remaining space other than the vacuum heat insulating material 1B.

【０１５４】また、１４は機械室で、１５は圧縮機であ
る。圧縮機１５は、凝縮器（図示せず）、キャピラリチ
ューブ（図示せず）、蒸発器（図示せず）とを環状に接
続して冷凍サイクルを形成しており、冷媒はイソブタン
を使用している。また、機械室１４と冷蔵室１６を仕切
る断熱壁にも真空断熱材１Ｂを配設している。Reference numeral 14 is a machine room, and 15 is a compressor. The compressor 15 forms a refrigeration cycle by annularly connecting a condenser (not shown), a capillary tube (not shown), and an evaporator (not shown), and uses isobutane as a refrigerant. There is. Further, the vacuum heat insulating material 1B is also arranged on the heat insulating wall that separates the machine room 14 and the refrigerating room 16.

【０１５５】このように構成された冷凍冷蔵庫の消費電
力量を測定したところ、真空断熱材を装着しない冷凍冷
蔵庫よりも２０％低下しており、断熱性能向上の効果を
確認できた。The power consumption of the refrigerator / freezer thus constructed was measured and found to be 20% lower than that of the refrigerator / freezer without the vacuum heat insulating material, confirming the effect of improving the heat insulation performance.

【０１５６】また、真空断熱材１Ｂの２側面にひれ部が
ないことから、ウレタンフォームを充填する際に真空断
熱材のひれ部により充填が阻害されることもなく、均一
にウレタンフォームが充填されていることも確認でき
た。Further, since there are no fins on the two side surfaces of the vacuum heat insulating material 1B, when the urethane foam is filled, the fins of the vacuum heat insulating material do not hinder the filling and the urethane foam is uniformly filled. I was able to confirm that

【０１５７】（比較例１）図１１は本発明との比較例１
における真空断熱材の断面図である。Comparative Example 1 FIG. 11 shows a comparative example 1 with the present invention.
3 is a cross-sectional view of the vacuum heat insulating material in FIG.

【０１５８】図１１において、２１は真空断熱材であ
り、２２は外被材、２３はボード状の芯材である。外被
材２２の材料構成は実施の形態１にて使用した外被材２
と同一であり、三方シールにて製袋し、芯材２３を挿入
したのち内部を減圧して密封されている。In FIG. 11, 21 is a vacuum heat insulating material, 22 is a jacket material, and 23 is a board-shaped core material. The material composition of the jacket material 22 is the jacket material 2 used in the first embodiment.
It is the same as the above, and the bag is made with a three-way seal, and after the core material 23 is inserted, the inside is depressurized and sealed.

【０１５９】芯材２３は、平均繊維径１２μｍのグラス
ウールの集綿材に対し、バインダーとしてフェノール樹
脂水溶液の固形分が１ｗｔ％となるように噴霧装置にて
均一に塗布し、その後２７０℃の熱風循環炉の中で密度
が６０ｋｇ／ｍ3となるように１０分間プレスしてボー
ド状に成形した。The core material 23 was uniformly applied to a cotton wool collecting material having an average fiber diameter of 12 μm by a spraying device so that the solid content of the phenol resin aqueous solution as a binder would be 1 wt%, and then hot air at 270 ° C. It was pressed in a circulating furnace for 10 minutes so as to have a density of 60 kg / m 3 and formed into a board shape.

【０１６０】このように作製した芯材２３の曲げ弾性率
を実施の形態１と同じ方法で測定したところ、０．０５
ＭＰａであった。The bending elastic modulus of the core material 23 thus manufactured was measured by the same method as in the first embodiment and found to be 0.05.
It was MPa.

【０１６１】この芯材２３を実施の形態１と同様に処理
して真空断熱材２１を作製しようとした。しかし、外被
材２２中に挿入しようとしたところ、芯材の２３の曲げ
弾性率が小さく剛性が小さいためにたわみが発生し、外
被材２２中に芯材２３をうまく挿入できなかったため、
外被材の開口部の内周長２４、及び外被材外周長２５を
さらに大きくして真空断熱材を作製することとなった。This core material 23 was treated in the same manner as in the first embodiment to produce the vacuum heat insulating material 21. However, when an attempt was made to insert the core member 23 into the outer covering material 22, bending occurred because the bending elastic modulus of the core material 23 was small and the rigidity was small, and the core material 23 could not be inserted into the outer covering material 22 well.
A vacuum heat insulating material was manufactured by further increasing the inner peripheral length 24 of the opening of the outer jacket material and the outer peripheral length 25 of the outer jacket material.

【０１６２】（比較例２）図１２は本発明との比較例２
における真空断熱材の断面図である。Comparative Example 2 FIG. 12 shows a comparative example 2 with the present invention.
3 is a cross-sectional view of the vacuum heat insulating material in FIG.

【０１６３】図１２において、３１は真空断熱材であ
り、３２は外被材、３３は芯材である。芯材３３は、平
均２次粒子径７μｍのシリカ粉末を、不織布を四方シー
ルにて製袋した内袋３４中に充填したものである。In FIG. 12, 31 is a vacuum heat insulating material, 32 is a jacket material, and 33 is a core material. The core material 33 is obtained by filling silica powder having an average secondary particle diameter of 7 μm in an inner bag 34 made of a non-woven fabric by a four-way seal.

【０１６４】外被材３２の材料構成は実施の形態１にて
使用した外被材２と同一であり、三方シールにて製袋
し、芯材３３を挿入して内部を減圧したのち開口部を密
封されている。The material composition of the outer cover material 32 is the same as that of the outer cover material 2 used in the first embodiment, and the bag is made by a three-way seal, the core material 33 is inserted and the inside pressure is reduced, and then the opening portion is formed. Is sealed.

【０１６５】ここで、内袋３４の外周長、すなわち芯材
外周長３５は６３０ｍｍであり、これに対して外被材３
２の開口部の内周長は余裕代を８０ｍｍとって７１０ｍ
ｍ、外被材外周長３６は７７０ｍｍとなるように外被材
３２を作製した。Here, the outer peripheral length of the inner bag 34, that is, the outer peripheral length 35 of the core material is 630 mm.
The inner peripheral length of the opening of 2 is 710 m with a margin of 80 mm.
The outer covering material 32 was manufactured so that the outer peripheral length 36 of the outer covering material 36 was 770 mm.

【０１６６】芯材３３は、外被材３２に挿入する前に１
４０℃の乾燥炉で１時間乾燥した。Before inserting the core material 33 into the outer covering material 32,
It was dried in a drying oven at 40 ° C. for 1 hour.

【０１６７】以上のようにして作製した真空断熱材３１
の熱伝導率は、平均温度２４℃にて０．００６５Ｗ／ｍ
Ｋであった。The vacuum heat insulating material 31 produced as described above
Has a thermal conductivity of 0.0065 W / m at an average temperature of 24 ° C.
It was K.

【０１６８】また、経時信頼性を確認するため加速試験
による断熱材の劣化を評価したが、１０年経過条件での
熱伝導率は平均温度２４℃にて０．００９Ｗ／ｍＫであ
った。In order to confirm the reliability over time, deterioration of the heat insulating material was evaluated by an acceleration test, but the thermal conductivity under the condition of 10 years elapsed was 0.009 W / mK at an average temperature of 24 ° C.

【０１６９】すなわち、実施の形態２記載の真空断熱材
と比較して、芯材がボード状でないために剛性がなく、
芯材外周長に対して外被材内周長を大きくしなければ外
被材中に芯材を挿入できなかった。That is, as compared with the vacuum heat insulating material described in the second embodiment, since the core material is not board-shaped, it has no rigidity,
The core material could not be inserted into the outer covering material unless the inner peripheral length of the outer covering material was made larger than the outer peripheral length of the core material.

【０１７０】したがって、芯材外周長と外被材内周長と
の差が大きいためにひれ部面積が増大し、冷凍冷蔵庫の
断熱壁等に本比較例２の真空断熱材を適用し、ウレタン
フォームを充填する場合には、前記ひれ部がウレタンフ
ォームの流動を阻害し、ウレタンフォームが充填されな
いキャビティーが生じ、熱漏洩や壁面の変形等が生じる
恐れがある。Therefore, the fin area increases due to a large difference between the outer peripheral length of the core material and the inner peripheral length of the outer covering material, and the vacuum heat insulating material of Comparative Example 2 is applied to a heat insulating wall of a refrigerator / freezer, and urethane is used. When the foam is filled, the fins may impede the flow of the urethane foam, a cavity not filled with the urethane foam may occur, and heat leakage and deformation of the wall surface may occur.

【０１７１】（比較例３）比較例２で示した真空断熱材
３１を、実施の形態７に示した冷蔵庫に適用した。(Comparative Example 3) The vacuum heat insulating material 31 shown in Comparative Example 2 was applied to the refrigerator shown in the seventh embodiment.

【０１７２】実施の形態７記載の冷凍冷蔵庫１０と比較
して、適用した真空断熱材３１のひれ部の面積が増大し
ているため、ウレタンフォームを充填する際に真空断熱
材３１のひれ部により充填が阻害され、一部にキャビテ
ィーの発生が確認された。Since the area of the fin portion of the applied vacuum heat insulating material 31 is larger than that of the refrigerator-freezer 10 described in the seventh embodiment, the fin portion of the vacuum heat insulating material 31 is filled with urethane foam when the urethane foam is filled. It was confirmed that the filling was hindered and that some cavities were generated.

【０１７３】したがって、実施の形態７と同様の方法で
真空断熱材を貼付しても、実施の形態７にて示した消費
電力量を達成することができなかっただけでなく、一部
壁面の変形も確認できた。Therefore, even if the vacuum heat insulating material was applied in the same manner as in the seventh embodiment, not only the power consumption amount shown in the seventh embodiment could not be achieved, but also a part of the wall surface Deformation was also confirmed.

【０１７４】[0174]

【発明の効果】以上のように、本発明の真空断熱材は、
芯材の減圧前の曲げ弾性率を０．５ＭＰａ以上としたの
で、芯材を外被材に挿入する際に芯材がたわんだり、あ
るいは割れたりすることもないため、芯材と外被材との
隙間を小さくしてもスムーズに芯材を挿入することがで
き、ひれ部の少ない真空断熱材を得ることができる。As described above, the vacuum heat insulating material of the present invention is
Since the bending elastic modulus of the core material before decompression is set to 0.5 MPa or more, when the core material is inserted into the jacket material, the core material does not bend or crack, so the core material and the jacket material are not broken. The core material can be smoothly inserted even if the gap between and is small, and a vacuum heat insulating material with few fins can be obtained.

【０１７５】また、本発明の真空断熱材は、減圧後、大
気圧下で外被材より取り出した時の芯材の曲げ弾性率を
０．２ＭＰａ以上としたので、芯材を外被材に挿入する
際に芯材がたわんだり、あるいは割れたりすることもな
いため、芯材と外被材との隙間を小さくしてもスムーズ
に芯材を挿入することができ、ひれ部の少ない真空断熱
材を得ることができる。Further, in the vacuum heat insulating material of the present invention, the bending elastic modulus of the core material when taken out from the jacket material under atmospheric pressure after decompression is set to 0.2 MPa or more, so that the core material is used as the jacket material. Since the core material does not bend or break during insertion, the core material can be inserted smoothly even if the gap between the core material and the jacket material is small, and vacuum insulation with few fins The material can be obtained.

【０１７６】また、本発明の真空断熱材は、芯材が平均
繊維径０．１μｍ以上１０μｍ以下の無機繊維と、前記
無機繊維に対して２０ｗｔ％以下のバインダーとからな
り、前記芯材の減圧前の密度を１００ｋｇ／ｍ３以上４
００ｋｇ／ｍ3以下としたので、芯材と外被材との隙間
が小さくても外被材のへりで芯材が削られることを抑制
することが可能となるとともに、削られた芯材が粉体と
なって外被材に付着して、減圧後にシール不良を引き起
こす可能性も大幅に減少する。In the vacuum heat insulating material of the present invention, the core material is composed of inorganic fibers having an average fiber diameter of 0.1 μm or more and 10 μm or less and a binder of 20 wt% or less with respect to the inorganic fibers. Previous density is 100kg / m3 or more 4
Since it is set to 00 kg / m 3 or less, even if the gap between the core material and the outer covering material is small, it is possible to prevent the core material from being scraped by the edge of the outer covering material, and The possibility of becoming powder and adhering to the covering material and causing a sealing failure after depressurization is greatly reduced.

【０１７７】また、初期断熱性能、及び信頼性の面から
最適な空隙径を保持した芯材を得ることができる。In addition, it is possible to obtain a core material having an optimum void diameter in terms of initial heat insulation performance and reliability.

【０１７８】また、本発明の真空断熱材は、芯材が平均
繊維径０．１μｍ以上１０μｍ以下の無機繊維と、前記
無機繊維に対して２０ｗｔ％以下のバインダーとからな
り、減圧後、大気圧下で外被材内における前記芯材の密
度を１１０ｋｇ／ｍ3以上４１３ｋｇ／ｍ3以下としたの
で、芯材と外被材との隙間が小さくても外被材のへりで
芯材が削られることを抑制することが可能となるととも
に、削られた芯材が粉体となって外被材に付着して、減
圧後にシール不良を引き起こす可能性も大幅に減少す
る。In the vacuum heat insulating material of the present invention, the core material is composed of inorganic fibers having an average fiber diameter of 0.1 μm or more and 10 μm or less and a binder of 20 wt% or less with respect to the inorganic fibers. since the density of the core material in the enveloping member in under was 110 kg / m 3 or more 413kg / m 3 or less, the core material cutting helicopter enveloping member even with a small gap between the core material and the envelope material In addition to being able to prevent the scraping, the possibility that the scraped core material becomes powder and adheres to the outer covering material to cause a sealing failure after depressurization is greatly reduced.

【０１７９】また、初期断熱性能、及び信頼性の面から
最適な空隙径を保持した芯材を得ることができる。Further, it is possible to obtain a core material having an optimum void diameter in terms of initial heat insulation performance and reliability.

【０１８０】また、本発明の真空断熱材は、少なくとも
ボード状の芯材を外被材の一辺の開口部から外被材中に
挿入する挿入ステップと、前記外被材内を減圧する減圧
ステップと、前記開口部を封止する封止ステップとを含
む製造方法で作製され、前記開口部の内周長と、前記開
口部と平行方向における前記芯材の外周長最大部との差
が０ｍｍより大きく３０ｍｍ以下としたので、芯材まわ
りにできるひれ部の面積を低減できる上に、芯材もスム
ーズに挿入できる。Further, the vacuum heat insulating material of the present invention includes an inserting step of inserting at least a board-shaped core material into the outer covering material from an opening of one side of the outer covering material, and a depressurizing step of decompressing the inside of the outer covering material. And a sealing step of sealing the opening, the difference between the inner peripheral length of the opening and the maximum outer peripheral length of the core member in the direction parallel to the opening being 0 mm. Since it is larger than 30 mm, the area of the fin portion formed around the core material can be reduced and the core material can be smoothly inserted.

【０１８１】また、本発明の真空断熱材は、外被材の開
口部と平行方向における少なくとも一断面において、減
圧封止後の芯材の外周長と外被材の外周長との差が０ｍ
ｍより大きく７０ｍｍ以下としたので、どのような袋形
態においてもひれ部を最小限に抑制できるような外被材
を得ることができる。Further, in the vacuum heat insulating material of the present invention, the difference between the outer peripheral length of the core material and the outer peripheral length of the outer jacket material after decompression sealing is 0 m in at least one cross section in the direction parallel to the opening of the outer jacket material.
Since it is larger than m and 70 mm or less, it is possible to obtain an outer covering material capable of minimizing the fin portion in any bag form.

【０１８２】また、本発明の真空断熱材を用いた冷凍機
器及び冷温機器は、外箱と、内箱と、前記外箱と前記内
箱によって形成される空間に、本発明のひれ部を減少さ
せた真空断熱材を配置することにより、真空断熱材のひ
れ部により発泡断熱材の発泡や流動が妨げられることも
なく、発泡断熱材を均一に充填させることができる。In the refrigerating machine and the cold machine using the vacuum heat insulating material of the present invention, the fin portion of the present invention is reduced in the outer box, the inner box, and the space formed by the outer box and the inner box. By arranging the vacuum heat insulating material thus arranged, the foam heat insulating material can be uniformly filled without the fins of the vacuum heat insulating material hindering foaming or flow of the foam heat insulating material.

【０１８３】また、本発明の真空断熱材を用いた冷凍機
器及び冷温機器は、圧縮機と、凝縮器と、キャピラリチ
ューブと、蒸発器とを環状に接続した冷凍サイクルを備
え、前記冷凍サイクル内に可燃性を有する冷媒を封入
し、外箱と、内箱と、外箱と内箱とによって形成される
空間に、ひれ部を減少させた真空断熱材と発泡断熱材を
用いることにより、発泡断熱材が均一に充填された、断
熱性能に優れた冷凍冷蔵庫を得ることができるととも
に、可燃性冷媒を封入した冷凍冷蔵庫に、特に無機繊維
を使用した真空断熱材を配設することにより、何らかの
条件により外部から冷凍冷蔵庫に類焼した場合でも、可
燃性冷媒への類焼を減少させることができる。The refrigerating machine and the cold machine using the vacuum heat insulating material of the present invention include a refrigerating cycle in which a compressor, a condenser, a capillary tube, and an evaporator are connected in an annular shape. By enclosing a flammable refrigerant in the outer box, the inner box, and the space formed by the outer box and the inner box, by using a vacuum heat insulating material and a foam heat insulating material with reduced fins, It is possible to obtain a freezer-refrigerator that is uniformly filled with a heat-insulating material and has excellent heat-insulating performance, and by disposing a vacuum heat-insulating material that particularly uses inorganic fibers in the refrigerator-freezer that contains a flammable refrigerant, Even if the freezer-refrigerator is burnt from the outside depending on the conditions, the burnout to the flammable refrigerant can be reduced.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の実施の形態における真空断熱材の斜視
図FIG. 1 is a perspective view of a vacuum heat insulating material according to an embodiment of the present invention.

【図２】図１のＡ−Ａ断面図FIG. 2 is a sectional view taken along line AA of FIG.

【図３】本発明の実施の形態における外被材の斜視図FIG. 3 is a perspective view of a jacket material according to the embodiment of the present invention.

【図４】本発明の実施の形態５における真空断熱材の斜
視図FIG. 4 is a perspective view of a vacuum heat insulating material according to a fifth embodiment of the present invention.

【図５】図４のＢ−Ｂ断面図5 is a sectional view taken along line BB of FIG.

【図６】本発明の実施の形態５における外被材の斜視図FIG. 6 is a perspective view of a jacket material according to the fifth embodiment of the present invention.

【図７】本発明の実施の形態６における真空断熱材の斜
視図FIG. 7 is a perspective view of a vacuum heat insulating material according to a sixth embodiment of the present invention.

【図８】図７のＣ−Ｃ断面図FIG. 8 is a sectional view taken along line CC of FIG.

【図９】本発明の実施の形態６における外被材の斜視図FIG. 9 is a perspective view of a jacket material according to the sixth embodiment of the present invention.

【図１０】本発明の実施の形態７における冷凍冷蔵庫の
縦断面図FIG. 10 is a vertical sectional view of a refrigerator-freezer according to a seventh embodiment of the present invention.

【図１１】本発明の比較例１における真空断熱材の断面
図FIG. 11 is a sectional view of a vacuum heat insulating material in Comparative Example 1 of the present invention.

【図１２】本発明の比較例２における真空断熱材の断面
図FIG. 12 is a sectional view of a vacuum heat insulating material in Comparative Example 2 of the present invention.

【符号の説明】[Explanation of symbols]

１，１Ａ，１Ｂ 真空断熱材 ２，２Ａ，２Ｂ 外被材 ３，３Ａ，３Ｂ 芯材 ４，４Ａ，４Ｂ 開口部 ７，７Ａ，７Ｂ 芯材外周長 ８，８Ａ，８Ｂ 外被材外周長 １１ 外箱 １２ 内箱 １５ 圧縮機 1,1A, 1B Vacuum insulation 2,2A, 2B jacket material 3,3A, 3B core material 4,4A, 4B opening 7,7A, 7B Core material outer circumference length 8,8A, 8B Outer peripheral length 11 outer box 12 inner box 15 compressor

Claims (8)

【特許請求の範囲】[Claims] 【請求項１】 ボード状の芯材と、前記芯材を覆い内部
を減圧した外被材とを備え、前記芯材の減圧前の曲げ弾
性率が０．５ＭＰａ以上であることを特徴とする真空断
熱材。1. A board-shaped core material, and an outer jacket material that covers the core material and decompresses the inside, wherein the flexural modulus of the core material before decompression is 0.5 MPa or more. Vacuum insulation. 【請求項２】 芯材が平均繊維径０．１μｍ以上１０μ
ｍ以下の無機繊維と、前記無機繊維に対して２０ｗｔ％
以下のバインダーとからなり、前記芯材の減圧前の密度
が１００ｋｇ／ｍ3以上４００ｋｇ／ｍ3以下であること
を特徴とする請求項１記載の真空断熱材。2. The core material has an average fiber diameter of 0.1 μm or more and 10 μm.
m or less inorganic fiber, and 20 wt% with respect to the inorganic fiber
The vacuum heat insulating material according to claim 1, comprising the following binder, wherein the density of the core material before depressurization is 100 kg / m 3 or more and 400 kg / m 3 or less. 【請求項３】 ボード状の芯材と、前記芯材を覆い内部
を減圧した外被材とを備え、減圧後、大気圧下で前記外
被材より取り出した時の前記芯材の曲げ弾性率が０．２
ＭＰａ以上であることを特徴とする真空断熱材。3. A bending elasticity of the core material when the board material is provided with a board-shaped core material and an outer covering material covering the core material and having a depressurized interior, and taken out from the outer covering material under atmospheric pressure after depressurization. Rate 0.2
A vacuum heat insulating material having a pressure of at least MPa. 【請求項４】 芯材が平均繊維径０．１μｍ以上１０μ
ｍ以下の無機繊維と、前記無機繊維に対して２０ｗｔ％
以下のバインダーとからなり、減圧後、大気圧下で前記
外被材内における前記芯材の密度が１１０ｋｇ／ｍ3以
上４１３ｋｇ／ｍ3以下であることを特徴とする請求項
３記載の真空断熱材。4. The core material has an average fiber diameter of 0.1 μm or more and 10 μm.
m or less inorganic fiber, and 20 wt% with respect to the inorganic fiber
It consists of a following binder, after depressurization, vacuum insulation according to claim 3, wherein the density of the core material in said outer covering material in is equal to or less than 110 kg / m 3 or more 413kg / m 3 under atmospheric pressure Material. 【請求項５】 少なくともボード状の芯材を外被材の一
辺の開口部から外被材中に挿入する挿入ステップと、前
記外被材内を減圧する減圧ステップと、前記開口部を封
止する封止ステップとを含む製造方法で作製され、前記
開口部の内周長と、前記開口部と平行方向における前記
芯材の外周長最大部との差が０ｍｍより大きく３０ｍｍ
以下であることを特徴とする請求項１から請求項４記載
の真空断熱材。5. An inserting step of inserting at least a board-shaped core material into an outer covering material from an opening of one side of the outer covering material, a depressurizing step of decompressing the inside of the outer covering material, and sealing the opening portion. And a difference between the inner peripheral length of the opening and the maximum outer peripheral length of the core member in the direction parallel to the opening is greater than 0 mm and 30 mm.
It is the following, The vacuum heat insulating material of Claim 1 characterized by the above-mentioned. 【請求項６】 外被材の開口部と平行方向における少な
くとも一断面において、減圧封止後の芯材の外周長と前
記外被材の外周長との差が０ｍｍより大きく７０ｍｍ以
下であることを特徴とする請求項５記載の真空断熱材。6. The difference between the outer peripheral length of the core material after the vacuum sealing and the outer peripheral length of the outer jacket material is greater than 0 mm and 70 mm or less in at least one cross section in a direction parallel to the opening of the outer jacket material. 6. The vacuum heat insulating material according to claim 5. 【請求項７】 外箱と、内箱と、前記外箱と前記内箱と
によって形成される空間に真空断熱材とを有し、前記真
空断熱材が請求項１から請求項６のうちいずれか一項記
載のものであることを特徴とする真空断熱材を用いた冷
凍機器及び冷温機器。7. An outer box, an inner box, and a vacuum heat insulating material in a space formed by the outer box and the inner box, wherein the vacuum heat insulating material is any one of claims 1 to 6. A refrigerating machine and a cold / warm machine using a vacuum heat insulating material, characterized in that 【請求項８】 圧縮機と、凝縮器と、キャピラリチュー
ブと、蒸発器とを環状に接続した冷凍サイクルを備え、
前記冷凍サイクル内に可燃性を有する冷媒を封入し、外
箱と、内箱と、前記外箱と前記内箱とによって形成され
る空間に真空断熱材とを有し、前記真空断熱材が請求項
１から請求項６のうちいずれか一項記載のものであるこ
とを特徴とする真空断熱材を用いた冷凍機器及び冷温機
器。8. A refrigeration cycle in which a compressor, a condenser, a capillary tube, and an evaporator are annularly connected,
A refrigerant having flammability is sealed in the refrigeration cycle, and an outer box, an inner box, and a vacuum heat insulating material in a space formed by the outer box and the inner box, wherein the vacuum heat insulating material is claimed. A refrigerating machine and a cold / warm machine using a vacuum heat insulating material, characterized by being one of claims 1 to 6.
JP2002123993A 2002-04-25 2002-04-25 Vacuum insulation material, and refrigeration equipment and cooling / heating equipment using vacuum insulation material Expired - Fee Related JP3563729B2 (en)

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JP2006316988A (en) * 2005-04-15 2006-11-24 Asahi Fiber Glass Co Ltd Core material for vacuum heat insulating material, its manufacturing method and vacuum heat insulating material
JP2006316901A (en) * 2005-05-12 2006-11-24 Asahi Fiber Glass Co Ltd Manufacturing method of core material for vacuum heat insulating material, and vacuum heat insulating material
WO2010029730A1 (en) * 2008-09-10 2010-03-18 パナソニック株式会社 Vacuum heat insulation material and manufacturing method therefor
JP2015003427A (en) * 2013-06-20 2015-01-08 凸版印刷株式会社 Sheath material of vacuum heat insulation material
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JP3039573U (en) * 1997-01-14 1997-07-22 日本特許管理株式会社 Tape insert bag
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JP2005331000A (en) * 2004-05-19 2005-12-02 Hitachi Home & Life Solutions Inc Vacuum heat insulating material and refrigerator using vacuum heat insulating material, and manufacturing method of vacuum heat insulating material
JP2006316988A (en) * 2005-04-15 2006-11-24 Asahi Fiber Glass Co Ltd Core material for vacuum heat insulating material, its manufacturing method and vacuum heat insulating material
JP2006316901A (en) * 2005-05-12 2006-11-24 Asahi Fiber Glass Co Ltd Manufacturing method of core material for vacuum heat insulating material, and vacuum heat insulating material
US9103114B2 (en) 2008-09-10 2015-08-11 Panasonic Corporation Vacuum heat insulation material and manufacturing method therefor
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JPWO2014087834A1 (en) * 2012-12-07 2017-01-05 旭硝子株式会社 Insulating material, manufacturing method thereof, and insulating construction method
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