JP3456988B1 - Vacuum heat insulating material, method of manufacturing the same, and heat insulating box using vacuum heat insulating material - Google Patents
Vacuum heat insulating material, method of manufacturing the same, and heat insulating box using vacuum heat insulating materialInfo
- Publication number
- JP3456988B1 JP3456988B1 JP2002163957A JP2002163957A JP3456988B1 JP 3456988 B1 JP3456988 B1 JP 3456988B1 JP 2002163957 A JP2002163957 A JP 2002163957A JP 2002163957 A JP2002163957 A JP 2002163957A JP 3456988 B1 JP3456988 B1 JP 3456988B1
- Authority
- JP
- Japan
- Prior art keywords
- heat insulating
- vacuum heat
- insulating material
- binder
- core material
- 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.)
- Expired - Fee Related
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- Thermal Insulation (AREA)
- Refrigerator Housings (AREA)
Abstract
【要約】
【課題】 真空断熱材を作製した後でも、ラミネートフ
ィルムの外被材に傷やピンホール等のダメージを与える
ことなく、通常の成形方法により表面に溝を形成できる
真空断熱材と製造方法を提供する。
【解決手段】 バインダーの濃度が表面層より内側層が
小さい成形体を芯材とすることにより、芯材内部は柔ら
かいため、真空断熱材を作製した後でも、通常の金型プ
レス等の成形方法により外被材フィルムにダメージを与
えることなく表面に溝を形成することができる。A vacuum heat insulating material capable of forming a groove on a surface by a normal molding method without producing damages such as scratches and pinholes on a covering material of a laminated film even after manufacturing a vacuum heat insulating material. Provide a way. SOLUTION: Since the inside of the core is soft by using a molded body having a binder concentration in which the inner layer is smaller than the surface layer as a core, even after a vacuum heat insulating material is produced, a molding method such as a normal mold press is used. Thereby, a groove can be formed on the surface without damaging the jacket material film.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、断熱容器や家電製
品、自動販売機、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 vacuum heat insulating material which can be used as a heat insulating material for heat insulating containers, home electric appliances, vending machines, vehicles, houses and the like.
【０００２】[0002]
【従来の技術】真空断熱材は外被材であるフィルムの内
部が減圧され、表面に大気圧が付加されているため非常
に硬直であり、成形しようとするとフィルムに損傷を与
えやすいため、ほとんどの適用例において平板のまま使
用され、適用箇所の形状によっては分割して複数枚使用
されている。2. Description of the Related Art A vacuum heat insulating material is very rigid because the inside of a film, which is a covering material, is decompressed and atmospheric pressure is applied to the surface, so that it tends to damage the film when attempting to form it. In the application example, the flat plate is used as it is, and a plurality of sheets are divided and used depending on the shape of the application site.
【０００３】そこで真空断熱材の適用範囲をより広くす
るために、真空断熱材を成形する方法が特公平６−１０
５１５２号公報で開示されている。その内容は、真空断
熱材を真空容器中に入れ周囲雰囲気を減圧し、フィルム
表面に付加されている大気圧を除去し、真空断熱材を柔
軟にした後成形し、更にその形状を保持したまま周囲雰
囲気を常圧に戻すことによって真空断熱材を得るように
したもので、フィルムに損傷を与えることなく容易に成
形できるというものである。Therefore, in order to widen the range of application of the vacuum heat insulating material, a method of forming the vacuum heat insulating material is disclosed in Japanese Patent Publication No. 6-10.
It is disclosed in Japanese Patent No. 5152. The contents are as follows: Put the vacuum insulation material in a vacuum container to decompress the surrounding atmosphere, remove the atmospheric pressure added to the film surface, soften the vacuum insulation material, and then mold it, while maintaining its shape. A vacuum heat insulating material is obtained by returning the ambient atmosphere to a normal pressure, and the film can be easily formed without damaging the film.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
方法で真空断熱材を成形するには、成形のたびに真空容
器中を真空にし、成形後常圧に戻す必要があり、生産性
が悪いという問題がある。また、真空容器中に成形金型
を設けなくてはならないため、装置が複雑になり、コス
トが掛かるという問題があった。However, in order to mold the vacuum heat insulating material by the conventional method, it is necessary to evacuate the inside of the vacuum container each time the molding is carried out, and to restore the pressure to the normal pressure after molding, resulting in poor productivity. There's a problem. Further, since a molding die has to be provided in the vacuum container, there is a problem that the apparatus becomes complicated and the cost increases.
【０００５】本発明は従来の課題を解決するもので、生
産性を向上し、通常の装置でコストが掛からない真空断
熱材及び製造方法を提供し、また、真空断熱材を用いた
熱損失が少ない断熱箱体を提供することを目的とする。The present invention solves the problems of the prior art, provides a vacuum heat insulating material and a manufacturing method which improve productivity and do not cost much with a normal apparatus. Further, the heat loss using the vacuum heat insulating material is reduced. The object is to provide a less insulated box body.
【０００６】[0006]
【課題を解決するための手段】本発明の真空断熱材は、
繊維材料を成形した芯材と、前記芯材を覆い内部を減圧
した外被材とを備え、前記芯材が表面層より内側層が柔
らかく、前記外被材から前記芯材にわたって溝が形成さ
れたことを特徴とするものであり、芯材内側層が柔らか
いため、真空断熱材作製後でも、金型のプレス圧を小さ
くして外被材の上から真空断熱材の表面に溝を形成する
ことができ、外被材への傷付きを抑制し、破れやピンホ
ール等のダメージを与えることがない。すなわち、大気
中で通常の装置を使用して溝の成形ができるものであ
り、生産性が向上するとともにコストを抑えることがで
きる。The vacuum heat insulating material of the present invention comprises:
A core material formed of a fibrous material, and an outer covering material covering the core material and having a reduced pressure inside, the inner layer of the core material being softer than a surface layer, and a groove is formed from the outer covering material to the core material. Since the inner layer of the core material is soft, even after the vacuum heat insulating material is manufactured, the press pressure of the mold is reduced to form a groove on the surface of the vacuum heat insulating material from above the outer covering material. It is possible to suppress damage to the outer covering material and prevent damage such as tears and pinholes. That is, the groove can be formed in the atmosphere by using an ordinary apparatus, which can improve the productivity and reduce the cost.
【０００７】そのために、本発明による真空断熱材の芯
材は、繊維材料をバインダーを用いて成形し、そのバイ
ンダーの濃度を芯材の表面層より内側層を小さくしたも
のであり、芯材内側層のバインダー濃度が小さいため柔
らかくすることができる。Therefore, the core material of the vacuum heat insulating material according to the present invention is formed by molding a fibrous material using a binder and making the concentration of the binder smaller in the inner layer than in the surface layer of the core material. It can be made soft because the binder concentration of the layer is low.
【０００８】また、本発明では芯材のバインダーが無機
材料からなるものであり、有機材料を使用したときと比
較して芯材硬度を全体的に小さくすることができ、芯材
の内側層もより柔らかくできる。Further, in the present invention, since the binder of the core material is made of an inorganic material, the hardness of the core material can be reduced as compared with the case of using an organic material, and the inner layer of the core material is also reduced. Can be softer.
【０００９】また、本発明では芯材のバインダーが、ホ
ウ酸、ホウ酸塩、リン酸、及びリン酸塩、或いはそれら
の加熱生成物のうち少なくともひとつを含むものであ
り、これらの物質はそれ自身でガラス状物質を形成する
もので、繊維材料の中でも無機繊維、特にガラス繊維と
親和性が良いためマイグレーションをおこしにくく、芯
材の表面層と内側層の濃度の調節が容易となるものであ
る。Further, in the present invention, the binder of the core material contains at least one of boric acid, borate, phosphoric acid, and a phosphoric acid salt or a heated product thereof, and these substances are It forms a glassy substance by itself, and because it has a good affinity with inorganic fibers, especially glass fibers among fibrous materials, migration does not occur easily, and it is easy to control the concentration of the surface layer and the inner layer of the core material. is there.
【００１０】また、本発明では、芯材がグラスウールを
集綿した積層体の表面に単なる水を噴霧して成形された
もので、水の付着によってグラスウールから溶出してく
る物質によりグラスウールの繊維を結着するもので、積
層体に水を噴霧する方法では内側層まで完全に水が浸透
することなく結着の強度が弱いもとのなり、すなわち内
側層ほど柔らかい芯材を得ることができる。Further, in the present invention, the core material is formed by spraying mere water on the surface of the laminated body obtained by collecting the glass wool, and the fiber of the glass wool is formed by the substance eluted from the glass wool by the adhesion of water. In the method of spraying water to the laminate, water is not completely penetrated to the inner layer and the strength of the binding is weak, that is, a core material having a softer inner layer can be obtained.
【００１１】本発明の真空断熱材の製造方法は、繊維材
料を表面層より内側層が柔らかくなるように成形した成
形体を、外被材で覆って内部を減圧して封止したのち、
外被材の外側からプレス成形により溝を形成するもので
あり、芯材である成形体の内側層が柔らかいため、真空
断熱材作製後でも、外被材の上から真空断熱材の表面に
溝を形成するための金型のプレス圧を小さくすることが
でき、外被材への傷付きを抑制し、破れやピンホール等
のダメージを与えることがない。すなわち、大気中で通
常の装置を使用して溝の成形ができるものであり、生産
性が向上するとともにコストを抑えることができる。In the method for producing a vacuum heat insulating material of the present invention, a molded body formed by molding a fibrous material so that the inner layer is softer than the surface layer is covered with an outer covering material, and the inside is depressurized and sealed.
Grooves are formed by press molding from the outside of the jacket material.Since the inner layer of the molded body that is the core material is soft, even after the vacuum insulation material is manufactured, grooves are formed on the surface of the vacuum insulation material from above the jacket material. It is possible to reduce the pressing pressure of the mold for forming the, to suppress damage to the outer covering material, and to prevent damage such as breakage and pinholes. That is, the groove can be formed in the atmosphere by using an ordinary apparatus, which can improve the productivity and reduce the cost.
【００１２】本発明の真空断熱材を用いた断熱箱体は、
外箱と内箱とにより形成された空間に本発明の真空断熱
材を備えるものであり、この真空断熱材に空間の内部に
存在する補強部や配管及び配線などの突起部に合わせて
溝を形成することにより、従来適用できなかった箇所で
の使用が可能となるとともに、従来は突起部を避けて複
数枚の真空断熱材を使用し、その継ぎ目などから発生し
ていた熱損失を防止することが可能となることにより、
断熱箱体の断熱性能を向上することができる。The heat insulating box body using the vacuum heat insulating material of the present invention is
A space formed by an outer box and an inner box is provided with the vacuum heat insulating material of the present invention, and grooves are formed in the vacuum heat insulating material in accordance with the protrusions such as the reinforcing portion, the pipe and the wiring existing inside the space. By forming it, it can be used in places where it could not be applied in the past, and in the past, multiple vacuum heat insulating materials were used to avoid the protrusions and prevent heat loss generated from the joints etc. By being able to
The heat insulation performance of the heat insulation box can be improved.
【００１３】[0013]
【発明の実施の形態】以下、本発明による真空断熱材の
実施の形態について、図面を参照しながら説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a vacuum heat insulating material according to the present invention will be described below with reference to the drawings.
【００１４】（実施の形態１）図１は、本発明の実施の
形態１による真空断熱材の断面図である。また、図２は
本発明の実施の形態１による真空断熱材の平面図であ
る。真空断熱材１は芯材２とガスバリア性フィルムから
なる外被材３とから構成され、内部が減圧されている。
真空断熱材１の表面には溝４が形成されている。(Embodiment 1) FIG. 1 is a sectional view of a vacuum heat insulating material according to Embodiment 1 of the present invention. FIG. 2 is a plan view of the vacuum heat insulating material according to the first embodiment of the present invention. The vacuum heat insulating material 1 is composed of a core material 2 and an outer covering material 3 made of a gas barrier film, and the inside is depressurized.
Grooves 4 are formed on the surface of the vacuum heat insulating material 1.
【００１５】図３は本発明の実施の形態１による真空断
熱材の成形体の断面図で、成形体５は繊維材料をバイン
ダー６を用いて成形したもので、バインダー６の濃度は
成形体５の表面層より内側層が小さくなっている。FIG. 3 is a cross-sectional view of a vacuum heat insulating material molded body according to the first embodiment of the present invention. The molded body 5 is a fiber material molded using a binder 6, and the binder 6 has a concentration of the molded body 5. The inner layer is smaller than the surface layer.
【００１６】成形体５と外被材３について詳細に説明す
る。The molded body 5 and the jacket material 3 will be described in detail.
【００１７】成形体５は、まず、平均繊維径５μｍのグ
ラスウールを所定形状になるまで積層して繊維成形体を
成形する。バインダー６は、グラスウール１００重量部
に対し、ホウ酸３重量部を水９７重量部に溶解し、ホウ
酸水溶液１００重量部としたものを使用した。As the molded body 5, first, glass wool having an average fiber diameter of 5 μm is laminated until it has a predetermined shape to mold a fiber molded body. As the binder 6, 3 parts by weight of boric acid was dissolved in 97 parts by weight of water to 100 parts by weight of glass wool to prepare 100 parts by weight of an aqueous boric acid solution.
【００１８】このホウ酸水溶液を噴霧装置にて繊維成形
体の両表面に噴霧し、それを一度常温でプレスする。そ
の後３５０℃の熱風循環炉の中で２０分間プレスし、厚
さが１５ｍｍ、密度が２３０ｋｇ／ｍ3の成形体５を得
た。This boric acid aqueous solution is sprayed on both surfaces of the fiber molding by a spraying device, and it is once pressed at room temperature. Then, it was pressed in a hot air circulation furnace at 350 ° C. for 20 minutes to obtain a molded body 5 having a thickness of 15 mm and a density of 230 kg / m 3 .
【００１９】噴霧により水溶液を付着したため内側層へ
は完全に浸透しておらず、内側層には加熱圧縮時の蒸気
により水溶液が拡散する。これにより、成形体５の内側
層はわずかなバインダー６により結着して、表面層に向
けてバインダー量が増大していることが確認できた。分
析の結果、成形体５の裏表の表面層各１ｍｍにそれぞれ
全体の約２８％のバインダー６が存在し、その内側の層
各４ｍｍにそれぞれ約１８％、残りの中心層５ｍｍに８
％が存在した。Since the aqueous solution is attached by spraying, it has not completely penetrated into the inner layer, and the aqueous solution diffuses into the inner layer due to the steam during heating and compression. As a result, it was confirmed that the inner layer of the molded body 5 was bound by a slight amount of the binder 6 and the amount of the binder increased toward the surface layer. As a result of the analysis, about 28% of the total amount of the binder 6 was present in each 1 mm of the front and back surface layers of the molded body 5, about 18% in each of the inner layers 4 mm, and 8 in the remaining center layer 5 mm.
% Was present.
【００２０】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たものである。The outer covering material 2 is a bag made of two laminated films by a three-way seal.
【００２１】この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直鎖状低密度ポリエチレンフィルム
（以下ＬＬＤＰＥと称す）が５０μｍ、ガスバリア層と
して厚み１５μｍのエチレン？ポリビニルアルコール共
重合体フィルム（以下ＥＶＯＨと称す）に膜厚５００Å
のアルミ蒸着を形成したフィルムと、厚み１２μｍのポ
リエチレンテレフタレートフィルム（以下ＰＥＴと称
す）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ＬＬＤＰＥとガスバリア層のＥＶＯＨをドライラミネ
ートしている。また、他の１枚は、熱融着層は厚み５０
μｍのＬＬＤＰＥ、その上にガスバリア層として厚み６
μｍのアルミ箔、さらに保護層として厚み１２μｍのナ
イロン、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 these two laminated films, 1
The linear low-density polyethylene film (hereinafter referred to as LLDPE) has a thickness of 50 μm as a heat-sealing layer, and a thickness of 15 μm ethylene as a gas barrier layer. Polyvinyl alcohol copolymer film (hereinafter referred to as EVOH) with a film thickness of 500Å
The aluminum-deposited film and the 12 μm-thick polyethylene terephthalate film (hereinafter referred to as PET) with a 500Å aluminum-deposited film bonded to each other on the aluminum-deposited surfaces, the LLDPE of the heat-sealing layer and the gas barrier. The layers of EVOH are dry laminated. In addition, for the other one, the heat fusion layer has a thickness of 50.
μm LLDPE with a gas barrier layer thickness of 6
An aluminum foil having a thickness of 12 μm, a protective layer having a thickness of 12 μm, and an outermost layer having a thickness of 12 μm are used.
【００２２】次に、真空断熱材１の製造方法について説
明する。Next, a method of manufacturing the vacuum heat insulating material 1 will be described.
【００２３】芯材２としては、内側層のバインダー濃度
を表面層よりも小さくして内部を柔らかくした成形体５
を用い、成形体５を１４０℃で１時間乾燥後、袋状の外
被材３中に挿入したものを、真空チャンバーに入れて内
部を減圧し、その状態で開口部をヒートシールにより密
封し、真空チャンバーから取り出すことにより作製し
た。As the core material 2, a molded body 5 in which the binder concentration of the inner layer is made smaller than that of the surface layer to make the inside softer
After the molded body 5 was dried at 140 ° C. for 1 hour, the molded body 5 was inserted into the bag-shaped jacket material 3 and placed in a vacuum chamber to decompress the inside, and in that state, the opening was sealed by heat sealing. , And was taken out from the vacuum chamber.
【００２４】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０．００２０Ｗ／ｍＫであった。The thermal conductivity of the vacuum heat insulating material 1 as described above is
The average temperature was 0.0020 W / mK at 24 ° C.
【００２５】その後、金型を使用してプレス成形により
真空断熱材１を挟圧し、表面に寸法が開口部５０ｍｍ、
底面（直線部）２０ｍｍ、深さ５ｍｍの溝４を形成し
た。外被材３に圧接する金型の角部分はＲ形状（１０
Ｒ）を施している。After that, the vacuum heat insulating material 1 is pinched by press molding using a die, and the dimension of the opening is 50 mm on the surface.
A groove 4 having a bottom surface (straight portion) of 20 mm and a depth of 5 mm was formed. The corner portion of the mold that is pressed against the jacket material 3 has an R shape (10
R) is applied.
【００２６】形成された溝４において、外被材３の表面
にピンホール等のダメージはなく、溝４の部分を除いて
熱伝導率の変化はなかった。In the formed grooves 4, there was no damage such as pinholes on the surface of the jacket material 3, and there was no change in the thermal conductivity except for the groove 4.
【００２７】更に、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０．０１４Ｗ／ｍＫで、
溝を形成しない真空断熱材との差はなかった。Furthermore, the deterioration of the heat insulating material was evaluated by an acceleration test to confirm the reliability over time. The thermal conductivity under the condition of 10 years was 0.014 W / mK at an average temperature of 24 ° C.,
There was no difference from the vacuum heat insulating material in which no groove was formed.
【００２８】すなわち、芯材の内側層のバインダー濃度
が小さく、内部が柔らかいため、真空断熱材作製後にプ
レス成形により溝を形成することに問題はなく、大気中
で通常の装置を使用して比較的小さなプレス圧で溝の成
形ができるものであり、生産性が向上するとともにコス
トを抑制できる。That is, since the binder concentration in the inner layer of the core material is small and the inside is soft, there is no problem in forming the grooves by press molding after the vacuum heat insulating material is prepared. Since the groove can be formed with a relatively small press pressure, the productivity can be improved and the cost can be suppressed.
【００２９】なお、真空断熱材の材料や構成について
は、上記に限るものではない。The material and structure of the vacuum heat insulating material are not limited to the above.
【００３０】繊維材料は公知のものを使用できるが、加
熱圧縮時の耐熱性の点から、好ましくは無機繊維がよ
い。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 fiber material, known materials can be used, but from the viewpoint of heat resistance during heating and compression, inorganic fibers are preferred. 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.
【００３１】また、その繊維径は特に指定するものでは
ないが、０．１μｍ〜１０μｍが断熱性能面、原綿の生
産性の点から好ましい。The fiber diameter is not particularly specified, but 0.1 μm to 10 μm is preferable in terms of heat insulation performance and raw cotton productivity.
【００３２】バインダーとしては、ホウ酸系化合物とし
て、ホウ酸、メタホウ酸、酸化ホウ素、四ホウ酸ナトリ
ウムの各水和物あるいは無水物等のホウ酸ナトリウム
類、ホウ酸アンモニウム、ホウ酸リチウム類、ホウ酸マ
グネシウム類、ホウ酸カルシウム類、ホウ酸アルミニウ
ム類、ホウ酸亜鉛類、過ホウ酸塩類、アルキルホウ酸、
ボロキシン誘導体等がある。As the binder, sodium borate such as boric acid, metaboric acid, boric oxide, sodium tetraborate hydrate or anhydride, boric acid-based compound, ammonium borate, lithium borate, Magnesium borate, calcium borate, aluminum borate, zinc borate, perborate, alkyl boric acid,
There are boroxine derivatives and the like.
【００３３】また、リン酸系化合物としては、リン酸、
五酸化二リン等の酸化リン、あるいはリン酸塩として第
一リン酸塩、第二リン酸塩、第三リン酸塩、ピロリン酸
塩、トリポリリン酸塩、メタリン酸塩等であり、それら
のナトリウム塩、カリウム塩、アンモニウム塩、マグネ
シウム塩、アルミニウム塩等がある。As the phosphoric acid compound, phosphoric acid,
Phosphorus oxide such as diphosphorus pentoxide, or phosphates such as primary phosphate, secondary phosphate, tertiary phosphate, pyrophosphate, tripolyphosphate, metaphosphate, etc., and their sodium There are salts, potassium salts, ammonium salts, magnesium salts, aluminum salts and the like.
【００３４】これらのうち、好ましくはガラス形成物、
あるいは水溶性物質であり、例えばホウ酸、メタホウ
酸、酸化ホウ素、ホウ砂、あるいはリン酸、第一リン酸
アルミニウム、ヘキサメタリン酸ナトリウム等である。Of these, preferably a glass-forming product,
Alternatively, it is a water-soluble substance, and examples thereof include boric acid, metaboric acid, boron oxide, borax, phosphoric acid, aluminum monophosphate, and sodium hexametaphosphate.
【００３５】以上のようなものを１種、あるいは２種以
上混合、あるいはその他のバインダーを混合、あるいは
それらを希釈して成形体のバインダーとして用いる。The above-mentioned materials are used alone or in admixture of two or more, or other binders are mixed, or they are diluted and used as a binder for a molded product.
【００３６】次に、バインダー付着方法を説明する。Next, the method of attaching the binder will be described.
【００３７】特に指定するものではないが、バインダー
またはその希釈液を塗布または噴霧したり、あるいはバ
インダーまたはその希釈液中に芯材を浸漬したり、ある
いは抄造法を用いたりすることにより、バインダーを付
着させる。Although not particularly specified, the binder can be prepared by coating or spraying the binder or its diluting solution, immersing the core material in the binder or its diluting solution, or using a papermaking method. Attach it.
【００３８】具体的には、上記のようにある程度成形し
たものに噴霧する方法の他、繊維であればその繊維化時
にバインダーやその希釈液を噴霧し、例えば芯材となる
表面層にはバインダー濃度の大きい繊維を、内側層には
バインダー濃度の小さい繊維を、更に中心層にはバイン
ダーのない繊維を配置し、その繊維積層体を圧縮加熱等
により固形化させることにより、成形体の厚み方向に対
しバインダー濃度の異なるボードを得ることも可能であ
る。Concretely, in addition to the method of spraying a molded product to some extent as described above, in the case of fiber, a binder or its diluting liquid is sprayed at the time of fiberizing, and for example, a binder is applied to the surface layer which becomes a core material. By placing fibers with a high concentration, fibers with a low binder concentration in the inner layer, and fibers with no binder in the center layer, and solidifying the fiber laminate by compression heating, etc., However, it is also possible to obtain boards with different binder concentrations.
【００３９】バインダー濃度は、芯材に対しバインダー
の固形分が０．５ｗｔ％以上２０ｗｔ％以下となるよう
にバインダーを付着させることが望ましい。バインダー
量が多くなると、バインダーからの発生ガスの増加や固
体熱伝導率の増加が懸念され、真空断熱材の断熱性能に
悪影響を及ぼすことが考えられるからである。The binder concentration is preferably such that the solid content of the binder is 0.5 wt% or more and 20 wt% or less with respect to the core material. This is because when the amount of the binder increases, there is concern that the amount of gas generated from the binder and the solid thermal conductivity may increase, which may adversely affect the heat insulating performance of the vacuum heat insulating material.
【００４０】バインダー濃度は、芯材の厚み方向におい
て、少なくともある部分とある部分の濃度が異なってい
ればよく、バインダー濃度の小さい部分に芯材硬度を低
減させ柔らかくする効果をもたせ、大きい部分にボード
の剛性を付与するという効果をそれぞれもたせることを
目的とするものである。The binder concentration may be such that at least a certain portion and a certain portion have different densities in the thickness direction of the core material, and a portion having a small binder concentration has an effect of reducing the hardness of the core material and softening it, and a large portion. The purpose is to add the effect of adding rigidity to the board.
【００４１】なお、芯材の表面層のバインダー濃度が大
きいということは、真空断熱材にしたときに表面の平面
性を良くすることができる。The fact that the binder concentration in the surface layer of the core material is high makes it possible to improve the flatness of the surface when used as a vacuum heat insulating material.
【００４２】更に、芯材の密度は１００ｋｇ／ｍ3〜４
００ｋｇ／ｍ3となるように加圧することが望ましく、
また芯材内部で密度が異なっていてもよい。Further, the density of the core material is 100 kg / m 3 to 4
It is desirable to pressurize so that it becomes 00 kg / m 3 ,
Further, the densities may be different inside the core material.
【００４３】密度が１００ｋｇ／ｍ3より小さいと成形
体としての形状を保持しにくくなり、４００ｋｇ／ｍ3
より大きくなると固くなり過ぎ、溝が成形しにくくな
る。If the density is less than 100 kg / m 3 , it becomes difficult to maintain the shape of the molded body, and 400 kg / m 3
If it becomes larger, it becomes too stiff and it becomes difficult to form the groove.
【００４４】次に、外被材について説明する。Next, the covering material will be described.
【００４５】外被材は、少なくともガスバリア層及び熱
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 covering material has at least a gas barrier layer and a heat-sealing layer, and may have a surface protective layer or the like as required.
【００４６】ガスバリア層としては、金属箔、無機酸化
物、あるいはダイヤモンドライクカーボン蒸着をしたプ
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, an inorganic oxide, a diamond-like carbon vapor-deposited plastic film, or the like can be used, but if it is used for the purpose of reducing gas permeation, it is not particularly specified. Absent.
【００４７】金属箔としては、アルミニウム、ステンレ
ス及び鉄等の箔を用いることができる。As the metal foil, foil of aluminum, stainless steel, iron or the like can be used.
【００４８】また、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、ポリイミドなどが好ましい。The material of the plastic film that serves as a substrate for vapor deposition of metal or the like is not particularly specified, but polyethylene terephthalate, ethylene-vinyl alcohol copolymer resin, polyethylene naphthalate, nylon, polyamide, polyimide, etc. Is preferred.
【００４９】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 a plastic film include aluminum, cobalt, nickel, zinc, copper,
Silver or a mixture thereof is not particularly specified.
【００５０】また、プラスチックフィルム上への無機酸
化物蒸着の材料としては、シリカ、アルミナ等がある。Materials for depositing inorganic oxides on a plastic film include silica and alumina.
【００５１】また、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, Alternatively, a mixture thereof or the like can be used, but it is not particularly specified.
【００５２】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。It is also possible to provide a surface protective layer on the outer surface of the gas barrier layer.
【００５３】表面保護層としては、ナイロンフィルム、
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。As the surface protective layer, a nylon film,
A polyethylene terephthalate film, a stretched product of a polypropylene film, or the like can be used. Further, if a nylon film or the like is provided on the outside, flexibility is improved, and bending resistance is improved.
【００５４】以上のようなフィルムをラミネートして、
外被材として用いることができる。By laminating the above films,
It can be used as a jacket material.
【００５５】（実施の形態２）実施の形態１で作製した
成形体５に、同形状の溝を切削により作製したものを芯
材４として、実施の形態１と同様にして真空断熱材１を
作製した。この段階で既に溝４が形成された真空断熱材
１となる。(Embodiment 2) The vacuum heat insulating material 1 is prepared in the same manner as in Embodiment 1 by using the molded body 5 produced in Embodiment 1 as the core material 4 which is produced by cutting grooves of the same shape. It was made. At this stage, the vacuum heat insulating material 1 having the groove 4 already formed is obtained.
【００５６】以上のような真空断熱材１の熱伝導率は、
実施の形態１と同様であり、１０年経過条件での熱伝導
率も差はなかった。The thermal conductivity of the vacuum heat insulating material 1 as described above is
Similar to the first embodiment, there was no difference in thermal conductivity under 10-year-old conditions.
【００５７】すなわち、芯材の内側層のバインダー濃度
が小さく、内部が柔らかいため、容易に成形体に溝を切
削形成するができ、金型プレスによる外被材のダメージ
のおそれがない。That is, since the binder concentration in the inner layer of the core material is low and the inside is soft, it is possible to easily cut and form grooves in the molded body, and there is no risk of damage to the outer covering material by the die press.
【００５８】なお、溝の形成は、成形体５を加熱圧縮す
るときの金型で行っても良い。The grooves may be formed by a mold used when the compact 5 is heated and compressed.
【００５９】（実施の形態３）本発明による真空断熱材
について、芯材２となる成形体５をグラスウールを水を
用いて成形したものを用いて製作する方法について説明
する。(Embodiment 3) With respect to the vacuum heat insulating material according to the present invention, a method of manufacturing the molded body 5 to be the core material 2 by molding glass wool with water will be described.
【００６０】遠心法にて製造した平均繊維径が約４μｍ
〜６μｍのガラス繊維の原綿を、所定の大きさに切断し
て所定量集綿積層する。集綿積層した集綿積層体に、ｐ
Ｈ値が６以上８以下の中性付近のイオン交換水を前記集
綿積層体の表面にほぼ均一に付着するよう噴霧した。噴
霧量は前記集綿積層体の重量に対して１．５倍〜２．０
倍とした。The average fiber diameter produced by the centrifugal method is about 4 μm.
Raw glass fiber of ˜6 μm is cut into a predetermined size and a predetermined amount of cotton is laminated. P is added to the collected cotton laminated body.
Ion-exchanged water having an H value of 6 or more and 8 or less in the vicinity of neutrality was sprayed so as to adhere to the surface of the cotton collecting laminate almost uniformly. The amount of spray is 1.5 times to 2.0 with respect to the weight of the cotton-collecting laminate.
Doubled
【００６１】イオン交換水を噴霧した集綿積層体を常温
下で圧縮して集綿積層体内部に水を拡散浸透させ、３８
０℃に加熱した金属製の冶具内にこの拡散浸透させた積
層体を戴置して金属製の押さえ板を上から置き、加熱プ
レスにて高温圧縮して１０分間以上保持して乾燥させ、
厚さ１０ｍｍの成形体５を作製した。The cotton collecting laminate sprayed with ion-exchanged water is compressed at room temperature to allow water to diffuse and penetrate into the inside of the cotton collecting laminate.
The diffused and permeated laminated body is placed in a metal jig heated to 0 ° C., a metal pressing plate is placed from above, hot compression is performed with a heating press, and holding is performed for 10 minutes or more to dry,
A molded body 5 having a thickness of 10 mm was produced.
【００６２】得られた成形体５は、圧縮を繰り返すこと
でガラス繊維が伝熱方向に対して垂直に配向され、積層
方向に対して裂けにくくなり、信頼性が高いものとな
る。The obtained molded body 5 has high reliability because the glass fibers are oriented perpendicular to the heat transfer direction by repeating the compression and is less likely to tear in the laminating direction.
【００６３】更に、作製した厚さ１０ｍｍの成形体５
を、縦１８０ｍｍ×横１８０ｍｍに切断して芯材２とす
る。芯材２は、１５０℃の乾燥炉で約６０分乾燥して成
形後も残留していた水分を除去する。Further, the formed compact 5 having a thickness of 10 mm
Is cut into a length of 180 mm and a width of 180 mm to obtain a core material 2. The core material 2 is dried in a drying oven at 150 ° C. for about 60 minutes to remove water remaining after molding.
【００６４】乾燥炉から乾燥した芯材２を取り出して、
あらかじめ芯材２に形成した凹部に吸着剤をすばやく収
納し、吸着剤を収納した芯材２を外被材３内に挿入して
真空チャンバ内に載置する。真空チャンバ内を１．３３
Ｐａ以下の真空度となるように減圧排気したのち、その
まま真空チャンバ内で外被材３の開口を熱溶着により密
閉する。できあがったものを真空チャンバから取り出
し、真空断熱材１を得た。Remove the dried core material 2 from the drying oven,
The adsorbent is quickly stored in the recess formed in the core material 2, and the core material 2 containing the adsorbent is inserted into the jacket material 3 and placed in the vacuum chamber. 1.33 in the vacuum chamber
After evacuating to a vacuum degree of Pa or less, the opening of the jacket material 3 is sealed by heat welding in the vacuum chamber as it is. The completed product was taken out of the vacuum chamber to obtain a vacuum heat insulating material 1.
【００６５】なお、集綿積層体に噴霧する水については
イオン交換水を用いているが、特に限定するものではな
く、蒸留水、アルカリイオン水、ミネラルウォーター、
ろ過浄水、又は水道水でも差し支えない。Although ion-exchanged water is used as the water sprayed on the cotton-collecting laminate, it is not particularly limited, and distilled water, alkaline ionized water, mineral water,
Filtered water or tap water may be used.
【００６６】また、水の特性値として、硬度、総アルカ
リ度、残留塩素濃度、亜硝酸性、硝酸性、アンモニ性と
いった塩基性窒素、リン酸、銅、鉄といったイオン濃度
等も特に限定するものではない。ただ、断熱性能面では
イオン交換水が好ましい。Further, as the characteristic value of water, hardness, total alkalinity, residual chlorine concentration, basic nitrogen such as nitrite, nitric, ammonic, and ion concentrations such as phosphoric acid, copper and iron are also limited. is not. However, ion-exchanged water is preferable in terms of heat insulation performance.
【００６７】以降、真空断熱材１の表面に溝を形成する
方法については実施の形態１と同様であるが、水を使用
して成形した場合はバインダーを使用した場合より柔ら
かい成形体が得られ、より外被材のダメージが少ない。Thereafter, the method of forming the grooves on the surface of the vacuum heat insulating material 1 is the same as that of the first embodiment, but when the molding is performed using water, a softer molded body can be obtained than when the binder is used. , Less damage to the jacket material.
【００６８】（実施の形態４）本発明の真空断熱材を用
いた断熱箱体として、冷蔵庫に適用した一例を説明す
る。(Embodiment 4) An example of a heat insulating box using the vacuum heat insulating material of the present invention applied to a refrigerator will be described.
【００６９】図４は実施の形態３による冷蔵庫の側面断
面図、図５は実施の形態３による冷蔵庫の要部分解斜視
図である。FIG. 4 is a side sectional view of the refrigerator according to the third embodiment, and FIG. 5 is an exploded perspective view of essential parts of the refrigerator according to the third embodiment.
【００７０】図４及び図５において、７は冷蔵庫で外箱
８と内箱９とにより箱体が構成され、その箱体の壁の内
部の空間には複数の真空断熱材が使用され、残りの空間
部にはシクロペンタンを発泡剤とした硬質ウレタンフォ
ーム１０が充填されている。In FIGS. 4 and 5, a refrigerator 7 has a box body composed of an outer box 8 and an inner box 9. A plurality of vacuum heat insulating materials are used in the space inside the wall of the box body, and the remaining space is used. The space is filled with a hard urethane foam 10 using cyclopentane as a foaming agent.
【００７１】冷蔵庫７は４つの部屋に区画されており、
上段から５℃程度の冷蔵温度に維持される冷蔵室１１、
その下段に乾燥を嫌う食品を収納するための野菜室１１
ａが２段あり、最下段に−２０℃程度の凍結温度に冷却
する冷凍室１１ｂがある。これら各室は、断熱仕切り板
１２，１３で区画されている。The refrigerator 7 is divided into four rooms,
A refrigerating room 11, which is maintained at a refrigerating temperature of about 5 ° C from the upper stage,
Vegetable room 11 for storing foods that hate drying in the lower part
There are two stages of a, and the freezing chamber 11b for cooling to a freezing temperature of about -20 ° C is provided at the lowest stage. Each of these chambers is partitioned by heat insulating partition plates 12 and 13.
【００７２】真空断熱材は、冷蔵庫７の天面、背面、左
右の側面、底面、４枚のドア、及び断熱仕切り板１２，
１３に配設している。天面、背面、及び左右の側面へ使
用した真空断熱材１Ａ，１Ｂ，１Ｃ，１Ｄは、外箱の内
面に沿った直径４ｍｍの冷媒配管１４の形状に沿った配
管溝１５を形成したもので、ホットメルトにより外箱の
内面に貼り付けた。配管溝１５の形状は、実施の形態１
における溝と同様である。また、各ドアへは溝がない通
常の真空断熱材１を使用し、底面にはドレンパイプを貫
通させるための孔１６を設けた真空断熱材１を使用し
た。The vacuum heat insulating material includes the top surface, the back surface, the left and right side surfaces, the bottom surface, the four doors of the refrigerator 7, and the heat insulating partition plate 12,
It is arranged at 13. The vacuum heat insulating materials 1A, 1B, 1C, 1D used for the top surface, the back surface, and the left and right side surfaces are formed by forming pipe grooves 15 along the shape of the refrigerant pipe 14 having a diameter of 4 mm along the inner surface of the outer box. It was attached to the inner surface of the outer box by hot melt. The shape of the pipe groove 15 is the same as in the first embodiment.
Is the same as the groove in. Further, a normal vacuum heat insulating material 1 having no groove was used for each door, and a vacuum heat insulating material 1 having a hole 16 for allowing a drain pipe to penetrate was used on the bottom surface.
【００７３】これらにより、真空断熱材の被覆率は冷蔵
庫７の外箱表面積に対して７０％まで達している。As a result, the coverage of the vacuum heat insulating material reaches 70% of the surface area of the outer box of the refrigerator 7.
【００７４】このようにして得られた冷蔵庫７の消費電
力を測定したところ、真空断熱材の被覆率が３０％のも
のと比較して約２０％低下していることが確認できた。When the power consumption of the thus obtained refrigerator 7 was measured, it was confirmed that the coverage of the vacuum heat insulating material was reduced by about 20% as compared with that of 30%.
【００７５】すなわち、冷蔵庫の断熱壁内部に配管等の
突起部が存在するような、従来は一枚の真空断熱材を使
用することができなかった箇所でも、その形状に合わせ
て真空断熱材に溝を成形することにより使用でできるよ
うになるとともに、１枚で適用できることで、真空断熱
材の継ぎ目部からの熱損失を低減できるため、冷蔵庫の
断熱性能を大幅に改善することができる。That is, even in a place where a single piece of vacuum heat insulating material could not be used in the past, such as where there is a protrusion such as piping inside the heat insulating wall of the refrigerator, a vacuum heat insulating material can be used according to its shape. By forming the groove, it becomes possible to use it, and since it can be applied with one sheet, the heat loss from the joint part of the vacuum heat insulating material can be reduced, so that the heat insulating performance of the refrigerator can be greatly improved.
【００７６】尚、冷蔵庫における真空断熱材の適用箇所
としては、庫内外の温度差が大きい箇所ほど効果がある
が、外箱表面積に対しては５０％以上の被覆率が望まし
い。被覆率が５０％以上となると、硬質ウレタンフォー
ム部からの熱損失の影響度が小さくなり、真空断熱材適
用による断熱効果が支配的となるため効率的な断熱が可
能となる。As a place where the vacuum heat insulating material is applied in the refrigerator, the place where the temperature difference between the inside and outside of the refrigerator is large is more effective, but a coverage of 50% or more with respect to the surface area of the outer box is desirable. When the coverage is 50% or more, the degree of influence of heat loss from the hard urethane foam portion becomes small, and the heat insulating effect due to application of the vacuum heat insulating material becomes dominant, so that efficient heat insulation becomes possible.
【００７７】このように、本発明の真空断熱材を適用す
ることにより、省エネルギーに優れた冷蔵庫を提供する
ことができる。As described above, by applying the vacuum heat insulating material of the present invention, a refrigerator excellent in energy saving can be provided.
【００７８】また、本発明の真空断熱材は、優れた断熱
性能を有するため、断熱壁の薄型化が可能となるため、
冷蔵庫の省スペース化、あるいは冷蔵庫の庫内容積向上
が達成できる。Since the vacuum heat insulating material of the present invention has excellent heat insulating performance, the heat insulating wall can be made thin,
It is possible to save space in the refrigerator or improve the internal volume of the refrigerator.
【００７９】また、真空断熱材の芯材は無機繊維である
ことから不燃性であり、冷蔵庫安全性の面からも優れた
ものである。Further, since the core material of the vacuum heat insulating material is an inorganic fiber, it is nonflammable, and is excellent in terms of refrigerator safety.
【００８０】以上、本発明の真空断熱材による断熱性能
の向上は各種断熱箱体において確認できるものであり、
給湯器や炊飯器、クーラーボックス等の各種保冷保温容
器のほか、自動販売機、車両、或いは住宅設備等の断熱
パネルとしても適用できるものである。As described above, the improvement of the heat insulating performance by the vacuum heat insulating material of the present invention can be confirmed in various heat insulating boxes.
In addition to various cold and heat insulation containers such as water heaters, rice cookers, and cooler boxes, it can also be applied as heat insulation panels for vending machines, vehicles, housing equipment, and the like.
【００８１】[0081]
【発明の効果】以上説明したように、本発明の真空断熱
材は、繊維材料を成形した芯材と、前記芯材を覆い内部
を減圧した外被材とを備え、前記芯材が表面層より内側
層が柔らかく、前記外被材から前記芯材にわたって溝が
形成されたことを特徴とするものであり、芯材内側層が
柔らかいため、真空断熱材作製後でも、金型のプレス圧
を小さくして外被材の上から真空断熱材の表面に溝を形
成することができ、外被材への傷付きを抑制し、破れや
ピンホール等のダメージを与えることがない。すなわ
ち、大気中で通常の装置を使用して溝の成形ができるも
のであり、生産性が向上するとともにコストを抑えるこ
とができる。As described above, the vacuum heat insulating material of the present invention comprises a core material formed of a fibrous material and an outer covering material that covers the core material and depressurizes the inside, and the core material is a surface layer. The inner layer is softer, and a groove is formed from the outer covering material to the core material.Since the core material inner layer is soft, even after the vacuum heat insulating material is manufactured, the pressing pressure of the mold can be reduced. A groove can be formed on the surface of the vacuum heat insulating material from above the outer covering material by reducing the size, and the outer covering material is prevented from being scratched and is not broken or pinholes are damaged. That is, the groove can be formed in the atmosphere by using an ordinary apparatus, which can improve the productivity and reduce the cost.
【００８２】また、本発明では芯材を繊維材料をバイン
ダーを用いて成形し、そのバインダーの濃度を芯材の表
面層より内側層を小さくして内側層を柔らかくすること
により、真空断熱材の外被材にダメージを与えることな
く金型のプレス成形による溝加工を行うことができる。Further, in the present invention, the core material is formed by using a fibrous material with a binder, and the concentration of the binder is made smaller in the inner layer than in the surface layer of the core material to soften the inner layer. It is possible to perform groove processing by press molding of a mold without damaging the outer covering material.
【００８３】また、本発明の真空断熱材は、芯材のバイ
ンダーを無機材料とすることにより、有機材料を使用し
たときと比較して、芯材硬度を全体的に小さくすること
ができるため、より外被材にダメージを与えることなく
金型のプレス成形による溝加工を行うことができる。Further, in the vacuum heat insulating material of the present invention, since the binder of the core material is made of an inorganic material, the hardness of the core material as a whole can be made smaller than that when an organic material is used. It is possible to perform groove processing by press molding of a mold without damaging the outer covering material.
【００８４】また、本発明は、バインダーを、ホウ酸、
ホウ酸塩、リン酸、及びリン酸塩、或いはそれらの加熱
生成物のうち少なくともひとつを含むものとすることに
より芯材の表面層と内側層の濃度の調節が容易となっ
て、内側層が柔らかい芯材の真空断熱材を得ることがで
きる。In the present invention, the binder is boric acid,
By containing at least one of borate, phosphoric acid, and phosphate, or a heating product thereof, it becomes easy to adjust the concentrations of the surface layer and the inner layer of the core material, and the inner layer has a soft core. A vacuum insulation material can be obtained.
【００８５】また、本発明は、グラスウールを集綿した
積層体の表面に水を噴霧して、水の付着によってグラス
ウールから溶出してくる物質によりグラスウールの繊維
を結着させることにより、内側層の結着強度が弱い、す
なわち内側層ほど柔らかい芯材の真空断熱材を得ること
ができる。Further, in the present invention, water is sprayed on the surface of the laminated body obtained by collecting glass wool, and the fibers of the glass wool are bound by the substance eluted from the glass wool due to the adhesion of water, whereby the inner layer A vacuum heat insulating material having a weak binding strength, that is, a core material having a softer inner layer can be obtained.
【００８６】また、本発明の真空断熱材の製造方法は、
繊維材料を表面層より内側層が柔らかくなるように成形
した成形体を、外被材で覆って内部を減圧して封止した
のち、外被材の外側からプレス成形により溝を形成する
ものであり、芯材である成形体の内側層が柔らかいた
め、真空断熱材作製後でも、外被材の上から真空断熱材
の表面に溝を形成するための金型のプレス圧を小さくす
ることができ、外被材への傷付きを抑制し、破れやピン
ホール等のダメージを与えることがない。すなわち、大
気中で通常の装置を使用して溝の成形ができるものであ
り、生産性が向上するとともにコストを抑えることがで
きる。The method for producing a vacuum heat insulating material of the present invention is
A molded body formed by molding a fiber material so that the inner layer is softer than the surface layer is covered with an outer covering material to reduce the pressure inside and then sealed, and then a groove is formed by press molding from the outside of the outer covering material. Since the inner layer of the molded body that is the core material is soft, it is possible to reduce the pressing pressure of the mold for forming the groove on the surface of the vacuum heat insulating material from above the outer covering material even after the vacuum heat insulating material is manufactured. It is possible to prevent damage to the outer covering material and prevent damage such as tearing and pinholes. That is, the groove can be formed in the atmosphere by using an ordinary apparatus, which can improve the productivity and reduce the cost.
【００８７】また、本発明の真空断熱材を用いた断熱箱
体は、外箱と内箱とにより形成された空間に本発明の真
空断熱材を備えるものであり、この真空断熱材に空間の
内部に存在する補強部や配管及び配線などの突起部に合
わせて溝を形成することにより、従来適用できなかった
箇所での使用が可能となるとともに、突起部を避けて複
数枚の真空断熱材を使用し、その継ぎ目などから発生し
ていた熱損失を防止することが可能となることにより、
断熱箱体の断熱性能を向上することができる。Further, the heat insulating box body using the vacuum heat insulating material of the present invention comprises the vacuum heat insulating material of the present invention in the space formed by the outer box and the inner box. By forming a groove in accordance with the reinforcing part inside and the protruding parts such as piping and wiring, it is possible to use it in places where it could not be applied conventionally, and avoid multiple protruding parts and use multiple vacuum insulation materials. By making it possible to prevent heat loss that has occurred from the seams etc.,
The heat insulation performance of the heat insulation box can be improved.
【図１】本発明の実施の形態１及び２による真空断熱材
の断面図FIG. 1 is a sectional view of a vacuum heat insulating material according to first and second embodiments of the present invention.
【図２】本発明の実施の形態１及び２による真空断熱材
の平面図FIG. 2 is a plan view of a vacuum heat insulating material according to first and second embodiments of the present invention.
【図３】本発明の実施の形態１及び２による真空断熱材
の成形体の断面図FIG. 3 is a sectional view of a vacuum heat insulating material molded body according to Embodiments 1 and 2 of the present invention.
【図４】本発明の実施の形態３による冷蔵庫の側断面図FIG. 4 is a side sectional view of a refrigerator according to a third embodiment of the present invention.
【図５】本発明の実施の形態３による冷蔵庫の要部分解
斜視図FIG. 5 is an exploded perspective view of essential parts of a refrigerator according to a third embodiment of the present invention.
１，１Ａ，１Ｂ，１Ｃ，１Ｄ 真空断熱材 ２ 芯材 ３ 外被材 ４ 溝 ５ 成形体 ６ バインダー ７ 冷蔵庫 ８ 外箱 ９ 内箱 １５ 配管溝 1,1A, 1B, 1C, 1D Vacuum insulation 2 core material 3 jacket material 4 grooves 5 molded body 6 binder 7 refrigerator 8 outer box 9 inner box 15 Piping groove
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平９−145239（ＪＰ，Ａ) 特開 昭51−147577（ＪＰ，Ａ) 特開 昭61−241594（ＪＰ，Ａ) 特開 平７−55088（ＪＰ，Ａ) 特開 平10−253243（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) F16L 59/00 - 59/22 F25D 23/02 - 23/08 ─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-9-145239 (JP, A) JP-A-51-147577 (JP, A) JP-A-61-241594 (JP, A) JP-A-7- 55088 (JP, A) JP 10-253243 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) F16L 59/00-59/22 F25D 23/02-23/08
Claims (7)
覆い内部を減圧した外被材とを備え、前記芯材が表面層
より内側層が柔らかく、前記外被材から前記芯材にわた
って溝が形成されたことを特徴とする真空断熱材。1. A core material formed of a fibrous material, and an outer covering material for covering the core material and reducing the pressure inside, wherein the inner material of the core material is softer than the surface layer, and the outer material covers the core material. A vacuum heat insulating material, characterized in that grooves are formed all over.
成形され、前記バインダーの濃度が前記芯材の表面層よ
り内側層が小さいことを特徴とする請求項１記載の真空
断熱材。2. The vacuum heat insulating material according to claim 1, wherein the core material is formed of a fiber material using a binder, and the concentration of the binder is smaller in the inner layer than in the surface layer of the core material.
徴とする請求項２記載の真空断熱材。3. The vacuum heat insulating material according to claim 2, wherein the binder is made of an inorganic material.
酸、及びリン酸塩、或いはそれらの加熱生成物のうち、
少なくともひとつを含むことを特徴とする請求項２又は
３記載の真空断熱材。4. The binder is selected from boric acid, borate, phosphoric acid, and phosphoric acid salts, or heat products thereof.
The vacuum heat insulating material according to claim 2 or 3, comprising at least one.
の表面に水を噴霧して成形されたことを特徴とする請求
項１記載の真空断熱材。5. The vacuum heat insulating material according to claim 1, wherein the core material is formed by spraying water on the surface of a laminate obtained by collecting glass wool.
なるように成形した成形体を、外被材で覆って内部を減
圧して封止したのち、外被材の外側からプレス成形によ
り溝を形成することを特徴とする真空断熱材の製造方
法。6. A molded body formed by molding a fibrous material so that the inner layer is softer than the surface layer is covered with an outer covering material to reduce the pressure inside and sealed, and then a groove is formed by press molding from the outside of the outer covering material. A method for manufacturing a vacuum heat insulating material, comprising:
り形成された空間に配設された真空断熱材とを備え、前
記真空断熱材が請求項１から５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断熱
箱体。7. An outer box, an inner box, and a vacuum heat insulating material arranged 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 5. A heat-insulating box body using a vacuum heat-insulating material, characterized in that
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002163957A JP3456988B1 (en) | 2002-06-05 | 2002-06-05 | Vacuum heat insulating material, method of manufacturing the same, and heat insulating box using vacuum heat insulating material |
| TW092114811A TW593919B (en) | 2002-05-31 | 2003-05-30 | Vacuum heat insulating material and method for producing the same, and refrigerator using the vacuum heat insulating material |
| MXPA04011825A MXPA04011825A (en) | 2002-05-31 | 2003-06-02 | Vacuum thermal insulating material, process for producing the same and refrigerator including the same. |
| CNB038126265A CN1308611C (en) | 2002-05-31 | 2003-06-02 | Vacuum thermal insulating material, process for producing the same and refrigerator including the same |
| US10/514,809 US7571582B2 (en) | 2002-05-31 | 2003-06-02 | Vacuum heat insulator, method of manufacturing the same, and refrigerator using the same |
| PCT/JP2003/006915 WO2003102460A1 (en) | 2002-05-31 | 2003-06-02 | Vacuum thermal insulating material, process for producing the same and refrigerator including the same |
| AU2003241723A AU2003241723A1 (en) | 2002-05-31 | 2003-06-02 | Vacuum thermal insulating material, process for producing the same and refrigerator including the same |
| EP03730754.3A EP1510747B1 (en) | 2002-05-31 | 2003-06-02 | Vacuum thermal insulating material, process for producing the same and refrigerator including the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002163957A JP3456988B1 (en) | 2002-06-05 | 2002-06-05 | Vacuum heat insulating material, method of manufacturing the same, and heat insulating box using vacuum heat insulating material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP3456988B1 true JP3456988B1 (en) | 2003-10-14 |
| JP2004011708A JP2004011708A (en) | 2004-01-15 |
Family
ID=29244319
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002163957A Expired - Fee Related JP3456988B1 (en) | 2002-05-31 | 2002-06-05 | Vacuum heat insulating material, method of manufacturing the same, and heat insulating box using vacuum heat insulating material |
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| Country | Link |
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| JP (1) | JP3456988B1 (en) |
Cited By (1)
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|---|---|---|---|---|
| JP2014142160A (en) * | 2012-12-26 | 2014-08-07 | Toshiba Corp | Refrigerator heat insulation box and method of manufacturing refrigerator heat insulation box |
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| JP4726970B2 (en) * | 2009-04-07 | 2011-07-20 | シャープ株式会社 | Vacuum insulation and equipment equipped with it |
| JP5372877B2 (en) * | 2010-09-14 | 2013-12-18 | 日立アプライアンス株式会社 | Vacuum heat insulating material and refrigerator using the same |
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| JP5372878B2 (en) * | 2010-09-14 | 2013-12-18 | 日立アプライアンス株式会社 | Vacuum heat insulating material and refrigerator equipped with the same |
| CN102401216B (en) | 2010-09-14 | 2014-05-14 | 日立空调·家用电器株式会社 | Vacuum insulating material and fridge using vacuum insulating material |
| JP5599383B2 (en) * | 2011-12-15 | 2014-10-01 | 三菱電機株式会社 | Vacuum heat insulating material, heat insulating box using vacuum heat insulating material, equipment using vacuum heat insulating material, and method for manufacturing vacuum heat insulating material |
| KR101489991B1 (en) * | 2012-05-29 | 2015-02-06 | (주)엘지하우시스 | Vacuum heat insulation material and manufacturing thereof |
| DE102012215314A1 (en) * | 2012-08-29 | 2014-03-06 | BSH Bosch und Siemens Hausgeräte GmbH | Housing for a household refrigerator and household refrigeration appliance |
| JP5985039B2 (en) * | 2013-06-07 | 2016-09-06 | 三菱電機株式会社 | refrigerator |
| AU2014275821B2 (en) * | 2013-06-07 | 2016-05-26 | Mitsubishi Electric Corporation | Heat insulating box body and refrigerator |
| WO2014196220A1 (en) * | 2013-06-07 | 2014-12-11 | 三菱電機株式会社 | Refrigerator |
| CN104295857A (en) * | 2013-07-15 | 2015-01-21 | 宁波康拜恩电器有限公司 | Thermal insulating layer of refrigerator or freezer |
| CN104527431A (en) * | 2014-12-04 | 2015-04-22 | 苏州欣航微电子有限公司 | Waterproof and heat insulation type LCD panel of electric vehicle |
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Cited By (1)
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|---|---|---|---|---|
| JP2014142160A (en) * | 2012-12-26 | 2014-08-07 | Toshiba Corp | Refrigerator heat insulation box and method of manufacturing refrigerator heat insulation box |
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| JP2004011708A (en) | 2004-01-15 |
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