JP4806720B2 - Vacuum heat insulating material, refrigerator using vacuum heat insulating material, and method for manufacturing vacuum heat insulating material - Google Patents

Vacuum heat insulating material, refrigerator using vacuum heat insulating material, and method for manufacturing vacuum heat insulating material Download PDF

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JP4806720B2
JP4806720B2 JP2009230134A JP2009230134A JP4806720B2 JP 4806720 B2 JP4806720 B2 JP 4806720B2 JP 2009230134 A JP2009230134 A JP 2009230134A JP 2009230134 A JP2009230134 A JP 2009230134A JP 4806720 B2 JP4806720 B2 JP 4806720B2
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heat insulating
insulating material
vacuum heat
ear
jacket
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裕行 小林
邦成 荒木
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Hitachi Appliances Inc
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Description

本発明は、真空断熱材、及び真空断熱材を用いた冷蔵庫、並びに真空断熱材の製造方法に関する。   The present invention relates to a vacuum heat insulating material, a refrigerator using the vacuum heat insulating material, and a method for manufacturing the vacuum heat insulating material.

真空断熱材、及び真空断熱材を用いた冷蔵庫に関する従来の方式として特許文献１に記載の方式がある。特許文献１では、シート状の無機繊維集合体を芯材とし、芯材をガスバリア性を有する外被材で被覆して内部を減圧した真空断熱材を、冷蔵庫の断熱壁内や仕切り板壁内に配設して、庫内温度上昇抑制による省エネを図っていた。   There exists a system of patent document 1 as a conventional system regarding the vacuum heat insulating material and the refrigerator using a vacuum heat insulating material. In Patent Document 1, a vacuum heat insulating material in which a sheet-like inorganic fiber aggregate is used as a core material, the core material is covered with a jacket material having a gas barrier property, and the inside is decompressed is placed in a heat insulating wall or a partition wall of a refrigerator. It was arranged to save energy by suppressing the rise in the internal temperature.

特開２００１−１６５５５７号公報JP 2001-165557 A

上記従来例の構成では、真空断熱材を前記冷蔵庫の断熱壁内や仕切り板壁内に配設してウレタン等の発泡断熱材を充填するときに次のような問題が生じ得る。すなわち、真空断熱材の芯材をガスバリア性を有する外被材で被覆し、内部を減圧密封する際には、前記外被材の芯材表面よりはみ出す所（以下「耳部」と表示する）が形成され、この耳部によって発泡断熱材の充填流動が阻害され、断熱壁内や仕切り板壁内に発泡断熱材の未充填箇所や充填比重の異なる断熱壁層が生ずる場合がある。そこで、上述の特許文献１では、外被材の耳部を真空断熱材の表面側に折り曲げていた（特許文献１の図２）。   In the configuration of the above conventional example, the following problems may occur when the vacuum heat insulating material is disposed in the heat insulating wall or partition wall of the refrigerator and filled with foamed heat insulating material such as urethane. That is, when the core of the vacuum heat insulating material is covered with a jacket material having a gas barrier property and the inside is sealed under reduced pressure, the portion protruding from the core material surface of the jacket material (hereinafter referred to as “ear part”) The filling flow of the foam heat insulating material is hindered by the ears, and there may be cases where the heat insulating wall layer and the partition wall are not filled with the foamed heat insulating material or the heat insulating wall layers having different filling specific gravity. Therefore, in Patent Document 1 described above, the ear portion of the jacket material is bent to the surface side of the vacuum heat insulating material (FIG. 2 of Patent Document 1).

しかし、外被材はガスバリア性を確保するためにアルミ箔やアルミ蒸着層を含む複層のラミネートフィルムで形成されているので外被材自身に剛性がある。さらに、耳部は外被材が二重に形成された部分であるので、折り曲げ後のスプリングバック等により変形する恐れがある。したがって、真空断熱材の表面と折り曲げた耳部との間に間隙を生じる場合があり、この間隙部に滞留する通常圧に近い（大気圧力に近い）空気分子の熱伝導により、高断熱性能を有するはずの真空断熱材の総合断熱性能を減少させてしまうという課題があった。   However, since the jacket material is formed of a multilayer laminate film including an aluminum foil or an aluminum vapor deposition layer in order to ensure gas barrier properties, the jacket material itself has rigidity. Furthermore, since the ear portion is a portion in which the outer jacket material is formed in a double manner, there is a possibility that the ear portion may be deformed by a springback after bending. Therefore, a gap may be formed between the surface of the vacuum heat insulating material and the bent ear, and high heat insulation performance is achieved by heat conduction of air molecules that are close to normal pressure (close to atmospheric pressure) staying in the gap. There was a problem of reducing the overall heat insulating performance of the vacuum heat insulating material that should have.

以下、前述の詳細を従来の方式の一例である図１３を用いて説明する。１は真空断熱材であり、真空断熱材１は、無機繊維集合体よりなる芯材２と、芯材２を被覆するガスバリア性を有する複層のラミネートフィルムで形成された外被材３と、により構成されている。外被材３は、真空断熱材を高真空度に保持できるように、中間層にガスバリア性を確保するためのアルミ箔やアルミ蒸着層等を有し、その最外層に耐突き刺し性を有するナイロン樹脂やポリエチレンテレフタレート樹脂等の層を有し、その最内層に高密度ポリエチレン樹脂等の熱溶着可能な合成樹脂層を有している。従って複層のラミネートフィルムで形成されているので、外被材３はそれ自身で剛性を有している。しかも、外被材３の内部を減圧密封するときに形成される外被材３の芯材２表面よりはみ出す所、つまり、耳部３aは外被材３が二重に形成されているので、かなりの剛性を有している。従って、図１３に示すように、折り曲げた耳部３aはそれ自身の剛性によるスプリングバック等により、この折り曲げた耳部３aと真空断熱材１の表面１aや側壁表面１cとの間に間隙１bや間隙１eが生じる場合がある。   The details will be described below with reference to FIG. 13 which is an example of a conventional method. 1 is a vacuum heat insulating material, and the vacuum heat insulating material 1 includes a core material 2 made of an inorganic fiber aggregate, and an outer cover material 3 formed of a multilayer laminate film having a gas barrier property that covers the core material 2; It is comprised by. The jacket material 3 has an aluminum foil or an aluminum vapor deposition layer for securing a gas barrier property in an intermediate layer so that the vacuum heat insulating material can be maintained at a high degree of vacuum, and the outermost layer is nylon having puncture resistance. It has a layer of resin, polyethylene terephthalate resin or the like, and has an innermost layer of a synthetic resin layer such as high-density polyethylene resin that can be thermally welded. Therefore, since it is formed of a multilayer laminate film, the jacket material 3 has its own rigidity. In addition, the outer cover material 3 formed when the inside of the outer cover material 3 is sealed under reduced pressure, that is, the portion of the outer cover material 3 that protrudes from the surface of the core material 2, that is, the ear portion 3 a, It has considerable rigidity. Therefore, as shown in FIG. 13, the bent ear portion 3a has a gap 1b between the bent ear portion 3a and the surface 1a of the vacuum heat insulating material 1 or the side wall surface 1c due to its own rigidity, such as springback. The gap 1e may occur.

前述の間隙１bや間隙１eが生じた真空断熱材１を、図示しないウレタン等の発泡断熱壁中に充填すると、間隙１b、１e内に大気圧力に近い空気が滞留したままでその周囲をウレタン等の発泡断熱材が充填されるので、間隙１b、１e内に滞留した空気分子の熱伝導により断熱性能が低下して、高断熱性能を有する真空断熱材１の周辺に、真空断熱材１より断熱性能の低い部分（間隙１bや１e）が形成されるので、トータルとして、該断熱壁の総合断熱性能を減少させてしまうという課題があった。   When the vacuum heat insulating material 1 having the gap 1b and the gap 1e described above is filled in a foam insulation wall such as urethane (not shown), the air around the atmospheric pressure remains in the gaps 1b and 1e, and the surroundings are urethane or the like. Therefore, the heat insulation performance is lowered by the heat conduction of the air molecules staying in the gaps 1b and 1e, and the vacuum heat insulation material 1 is insulated from the periphery of the vacuum heat insulation material 1 having high heat insulation performance. Since low performance portions (gap 1b and 1e) are formed, there is a problem that the total heat insulation performance of the heat insulation wall is reduced as a whole.

また、真空断熱材１は、真空断熱材１自身の製造工程や運搬・保管工程等のハンドリングや保管期間の経過により、前述の折り曲げた耳部３a自身の剛性によるスプリングバック等により、耳部３aと真空断熱材の表面１aとの間に間隙３bが生じる場合がある。   Further, the vacuum heat insulating material 1 is processed by the manufacturing process of the vacuum heat insulating material 1 itself, the handling / transportation process, etc., and the ear part 3a by the springback or the like due to the rigidity of the bent ear part 3a itself as described above. In some cases, a gap 3b may be formed between the surface 1a of the vacuum heat insulating material.

さらには、真空断熱材１は、真空断熱材１自身の製造工程や運搬・保管工程等のハンドリングによる変形により、或いは、真空断熱材１を冷蔵庫に組み込むときのハンドリングによる変形により、前述の耳部３aに「変形」や「しわ」による隙間３cが生じる場合がある。この隙間３b、３cの生じた状態で図示しないウレタン等の発泡断熱壁中に充填すると、隙間３b、３c内にウレタン等の原液が浸入して、前記折り曲げられた耳部３a自身が局部的あるいは全体的に変形して、ウレタンの充填流動を阻害する恐れがあった。   Further, the vacuum heat insulating material 1 may be deformed by handling of the vacuum heat insulating material 1 itself, such as a manufacturing process, a transportation / storage process, or the deformation of the vacuum heat insulating material 1 by handling when the vacuum heat insulating material 1 is incorporated in a refrigerator. A gap 3c due to “deformation” or “wrinkle” may occur in 3a. When a foam insulation wall such as urethane (not shown) is filled with the gaps 3b and 3c formed, a stock solution such as urethane enters into the gaps 3b and 3c, and the bent ears 3a themselves are locally or There was a risk that the deformation of the whole would hinder urethane filling flow.

これを解決するために、前述した耳部の変形防止としてテープ等を用いて組み込み前に固定する方法が挙げられる。この場合のテープによる固定方法について、図１４を用いて説明する。なお、前述の図１３と同一構成については、同一符号を付して詳細な説明を省略する。   In order to solve this, there is a method of fixing before assembling using a tape or the like as the above-described prevention of deformation of the ear portion. A fixing method using a tape in this case will be described with reference to FIG. In addition, about the same structure as above-mentioned FIG. 13, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

図１４（a）において、耳部３fは、図１３の場合と同様に外被材３が二重に形成されているのでかなりの剛性を有している。従って、図１４（a）に示すように、折り曲げた耳部３fはそれ自身の剛性によるスプリングバック等により、真空断熱材１の表面１fや側壁表面１mとの間に間隙１gや間隙１ｈが生じてしまう。   In FIG. 14 (a), the ear portion 3f has a considerable rigidity because the covering material 3 is formed in a double manner as in the case of FIG. Therefore, as shown in FIG. 14 (a), the bent ear portion 3f has a gap 1g and a gap 1h between the surface 1f of the vacuum heat insulating material 1 and the side wall surface 1m due to its own springback or the like. End up.

従って、間隙１g、１hの大きさ寸法が、増加しないように接着テープ５で、耳部３fと真空断熱材の表面１fを固定していた。しかし、接着テープ５で耳部３fが固定されていても、間隙１g、１hが生じている場合には真空断熱材１を配設して発泡断熱材を充填すると、間隙１ｇ、１h内に滞留した通常圧に近い（大気圧力に近い）空気分子の熱伝導により、高断熱性能を有する真空断熱材１の周辺に、真空断熱材１より断熱性能の低い部分（間隙１g、１ｈ）が形成されるので、トータルとして断熱壁の総合断熱性能を減少させてしまうという課題があった。   Therefore, the ear portion 3f and the surface 1f of the vacuum heat insulating material are fixed with the adhesive tape 5 so that the size of the gaps 1g and 1h does not increase. However, even if the ear 3f is fixed with the adhesive tape 5, if the gaps 1g and 1h are generated, if the vacuum heat insulating material 1 is disposed and the foamed heat insulating material is filled, it stays in the gaps 1g and 1h. As a result of heat conduction of air molecules close to normal pressure (close to atmospheric pressure), a portion (gap 1 g, 1 h) having lower heat insulation performance than the vacuum heat insulation material 1 is formed around the vacuum heat insulation material 1 having high heat insulation performance. Therefore, there has been a problem that the overall heat insulating performance of the heat insulating wall is reduced as a whole.

また、図１４（ｂ）に示すように、折り曲げた耳部３nが、真空断熱材の側壁表面１p側のみに位置するように構成しても、この折り曲げた耳部３nはそれ自身の剛性によるスプリングバック等により、折り曲げた耳部３nと側壁表面１pとの間に間隙１rが生じてしまう。前述したように、間隙１rに滞留した大気圧力に近い空気分子の熱伝導により、高断熱性能を有する真空断熱材１の周辺に、該真空断熱材１より断熱性能の低い部分（間隙１r）が形成されるので、トータルとして、該断熱壁の総合断熱性能を減少させてしまうと言う課題があった。   Further, as shown in FIG. 14B, even if the bent ear portion 3n is arranged only on the side wall surface 1p side of the vacuum heat insulating material, the bent ear portion 3n depends on its own rigidity. A gap 1r is generated between the bent ear 3n and the side wall surface 1p due to the spring back or the like. As described above, a portion (gap 1r) having a lower heat insulating performance than the vacuum heat insulating material 1 is formed around the vacuum heat insulating material 1 having a high heat insulating performance due to the heat conduction of air molecules staying in the gap 1r near the atmospheric pressure. Since it is formed, there is a problem that the total heat insulating performance of the heat insulating wall is reduced as a total.

また、図１４（a）（ｂ）に示す耳部の固定テープ５は、通常コイル巻き状態のテープを巻き解いて使用する場合が多く、コイル巻き状態のテープを容易に巻き解けるように、その表面５aには通常は剥離剤が塗布されている。従って、固定テープ表面５aと前述のウレタン等の発泡断熱材との接着力は、真空断熱材表面１fと前述のウレタン等の発泡断熱材との接着力より弱い。従って、図１４（a）（ｂ）に示す耳部の固定テープ５を有する真空断熱材を含んだ断熱壁の強度が弱くなるという課題があった。   14 (a) and 14 (b), the fixing tape 5 of the ear part is usually used by unwinding a tape in a coiled state, so that the tape in a coiled state can be easily unwound. A release agent is usually applied to the surface 5a. Therefore, the adhesive force between the fixed tape surface 5a and the above-described foamed heat insulating material such as urethane is weaker than the adhesive force between the vacuum heat insulating material surface 1f and the above-mentioned foamed heat insulating material such as urethane. Therefore, the subject that the intensity | strength of the heat insulation wall containing the vacuum heat insulating material which has the fixing tape 5 of the ear | edge part shown to FIG. 14 (a) (b) became weak occurred.

本発明は、このような従来の構成が有していた課題を解決しようとするものであり、真空断熱材の総合断熱性能の減少を防ぎ、省エネに寄与する真空断熱材、及び真空断熱材を用いた冷蔵庫、並びに真空断熱材の製造方法を提供することを目的とする。   The present invention intends to solve the problems of such a conventional configuration, and prevents a decrease in the overall heat insulation performance of the vacuum heat insulating material, and contributes to energy saving vacuum heat insulating material and vacuum heat insulating material. It aims at providing the manufacturing method of the used refrigerator and a vacuum heat insulating material.

本発明の請求項１に記載の発明は、芯材と該芯材を被覆する外被材とを備え、前記外被材の内部を減圧密封する真空断熱材において、前記外被材は熱溶着可能な合成樹脂層と、該合成樹脂層の外層のガスバリヤ性を有する金属層と、前記芯材表面よりはみ出す耳部とを有し、前記外被材の周縁に前記耳部の一部として形成され且つ該耳部の幅よりも小さい幅の熱溶着部と、前記耳部の端部から前記真空断熱材の側部にわたって塗られた接着部材と、を備え、前記耳部のうち前記真空断熱材表面との間に前記接着部材を介在させて前記真空断熱材表面側に重合し密着するように折り曲げられた部分は該真空断熱材表面側の変形が防止されるように全面的に接着されて、前記耳部と前記真空断熱材側壁表面との間には空気層を有するので、従来真空断熱材周辺に形成されていた真空断熱材より断熱性能の悪い空気分子の滞留する間隙を小さくできるので、トータルとしての熱漏洩が減少する真空断熱材を提供できる。 The invention according to claim 1 of the present invention is a vacuum heat insulating material that includes a core material and a jacket material that covers the core material, and that seals the inside of the jacket material under reduced pressure. A possible synthetic resin layer, a metal layer having a gas barrier property of the outer layer of the synthetic resin layer, and an ear portion protruding from the surface of the core material, and formed as a part of the ear portion on the periphery of the jacket material is and provided with heat seal parts of smaller width than the width of the ear portion, and a bonding member painted over the side of the vacuum heat insulating material from the end of the ear portion, the vacuum of the pre Kimimi portion entirely adhered to the bent portion so that the adhesive member is interposed polymerization in the vacuum heat insulating material surface to contact the deformation of the vacuum heat insulating material surface is prevented between the heat insulating material surface is, since between the ears and the vacuum heat insulating material sidewall surface having an air layer, the conventional true Can be made smaller residence to clearance poor air molecules heat insulating performance of the vacuum heat insulating material which has been formed around the heat insulating material, it is possible to provide a vacuum insulation material heat leakage as a total is reduced.

また、剛性のある外被材の耳部が真空断熱材自身に密着するので、該真空断熱材自身の強度が向上するので、該真空断熱材自身の製造工程や運搬・保管工程等のハンドリングによる変形や経時変化が少ないので、ハンドリング性の良い真空断熱材を提供できる。   In addition, since the ear portion of the rigid jacket material is in close contact with the vacuum heat insulating material itself, the strength of the vacuum heat insulating material itself is improved, so that the vacuum heat insulating material itself can be handled by the manufacturing process, transportation / storage process, etc. Since there is little deformation or change over time, a vacuum heat insulating material with good handling properties can be provided.

本発明の請求項２に記載の発明は、外板と内板とを備え、前記外板と前記内板とによって形成される空間に真空断熱材を配設し、前記真空断熱材以外の前記空間に発泡断熱材を充填した冷蔵庫において、前記真空断熱材は、芯材と該芯材を被覆する外被材とを備え、前記外被材は熱溶着可能な合成樹脂層と、該合成樹脂層の外層のガスバリヤ性を有する金属層と、前記芯材表面よりはみ出す耳部とを有し、前記外被材の周縁に前記耳部の一部として形成され且つ該耳部の幅よりも小さい幅の熱溶着部と、前記耳部の端部から前記真空断熱材の側部にわたって塗られた接着部材と、を備え、前記耳部のうち前記真空断熱材表面との間に前記接着部材を介在させて前記真空断熱材表面側に重合し密着するように折り曲げられた部分は該真空断熱材表面側の変形が防止されるように全面的に接着されて、前記耳部と前記真空断熱材側壁表面との間には空気層を有するので、剛性のある外被材の耳部が真空断熱材自身に密着して、該真空断熱材自身の強度が向上し、かつ、耳部を覆うものが無いので、ウレタン等の発泡断熱材との接着強度が強い真空断熱材を提供でき、該真空断熱材をウレタン等の発泡断熱材中に設置した箱体強度の強い断熱壁を有する冷蔵庫を提供できる。
The invention according to claim 2 of the present invention includes an outer plate and an inner plate, and a vacuum heat insulating material is disposed in a space formed by the outer plate and the inner plate, and the other than the vacuum heat insulating material, In the refrigerator in which the space is filled with foam heat insulating material, the vacuum heat insulating material includes a core material and a jacket material covering the core material, and the jacket material is a heat-weld synthetic resin layer and the synthetic resin. A metal layer having gas barrier properties of the outer layer of the layer and an ear portion protruding from the surface of the core material, and formed as a part of the ear portion on the periphery of the outer jacket material and smaller than the width of the ear portion the adhesive member between the heat-welded portion in the width, and an adhesive member painted over the side of the vacuum heat insulating material from the end of the ear portion, the vacuum heat insulator surface of the front Kimimi portion the bent portion so as to be interposed polymerization in the vacuum heat insulating material surface adhesion is the vacuum heat insulating material In is entirely bonded as deformation of the side is prevented, since an air layer, vacuum insulation ears of the enveloping member with rigidity is between the ears and the vacuum heat insulating material sidewall surface in close contact with the timber itself, improves the strength of the vacuum heat insulating material itself, and, since there is no covering the ears, the adhesion strength between the foam insulation such as urethane can at providing a strong vacuum heat insulating material, the The refrigerator which has the heat insulation wall with a strong box body which installed the vacuum heat insulating material in foam heat insulating materials, such as urethane, can be provided.

本発明の請求項３に記載の発明は、芯材と該芯材を被覆する外被材とを備え、前記外被材の内部を減圧密封し、前記外被材は熱溶着可能な合成樹脂層と、該合成樹脂層の外層のガスバリヤ性を有する金属層と、前記芯材表面よりはみ出す耳部とを有し、前記外被材の周縁に前記耳部の一部として形成され且つ該耳部の幅よりも小さい幅を熱溶着し、前記耳部の端部から前記真空断熱材の側部にわたる前記耳部、或いは、前記耳部が密着する前記真空断熱材表面、或いは、前記耳部と該耳部が密着する前記真空断熱材表面、に接着部材を塗布する接着工程を有し、該塗布工程により塗布した前記接着部材の接着力により、前記耳部のうち前記真空断熱材表面との間に前記接着部材を介在させて前記真空断熱材の角部を覆い該真空断熱材表面側に重合し密着するように折り曲げた部分は前記真空断熱材表面側の変形が防止されるように全面的に接着して前記耳部と前記真空断熱材側壁表面との間には空気層を備えるので、従来真空断熱材周辺に形成されていた真空断熱材より断熱性能の悪い空気分子の滞留する間隙を小さくできるので、トータルとしての熱漏洩が減少する真空断熱材の製造方法を提供できる。 The invention according to claim 3 of the present invention comprises a core material and a jacket material covering the core material, the inside of the jacket material is sealed under reduced pressure, and the jacket material is a heat-weld synthetic resin A metal layer having gas barrier properties as an outer layer of the synthetic resin layer, and an ear portion protruding from the surface of the core material, and formed as a part of the ear portion on the periphery of the outer jacket material. a width less than the width of the parts thermally welded, the ear portion from an end portion of the ear portion that cotton on the side of the vacuum heat insulating material, or the vacuum insulation material surface, wherein the ear portions are in close contact, or the has a bonding step of the ear portion and the ear portion applying an adhesive member and the vacuum insulation material surface, to be in close contact, the adhesive strength of the adhesive member is applied by coating processes, the vacuum heat insulating material of the ear portion Covering the corners of the vacuum heat insulating material with the adhesive member interposed between the surface and the surface side of the vacuum heat insulating material Since the bent portions so as to engage in close contact comprises a layer of air between the vacuum heat insulating material surface the ears and entirely bonded to deformation is prevented side to the vacuum heat insulating material sidewall surface In addition, since the gap in which air molecules with poor thermal insulation performance are retained can be reduced as compared with the conventional vacuum heat insulating material formed around the vacuum heat insulating material, it is possible to provide a method for manufacturing a vacuum heat insulating material that reduces heat leakage as a whole.

また、剛性のある外被材からなる耳部が真空断熱材自身に密着するので、該真空断熱材自身の強度が向上するので、該真空断熱材自身の製造工程や運搬・保管工程等のハンドリングによる変形や経時変化が少ないので、ハンドリング性の良い真空断熱材の製造方法を提供できる。   In addition, since the ear portion made of a rigid jacket material is in close contact with the vacuum heat insulating material itself, the strength of the vacuum heat insulating material itself is improved, so that the vacuum heat insulating material itself is handled in the manufacturing process, transportation / storage process, etc. Therefore, it is possible to provide a method for manufacturing a vacuum heat insulating material with good handling properties.

本発明の請求項４に記載の発明は、接着部材として、合成ゴム系のホットメルト接着剤を使用したので、接着部材の塗布作業が容易になり、かつ、塗布時間の短縮が図れるので、接着する工程の作業能率向上および製造コスト低減の図れる真空断熱材及び真空断熱材を用いた冷蔵庫を提供できる。 Since the invention according to claim 4 of the present invention uses a synthetic rubber-based hot melt adhesive as the adhesive member, the application work of the adhesive member becomes easy and the application time can be shortened. It is possible to provide a vacuum heat insulating material and a refrigerator using the vacuum heat insulating material capable of improving the work efficiency of the process to be performed and reducing the manufacturing cost.

本発明の請求項５に記載の発明は、接着部材として、合成ゴム系のホットメルト接着剤
を使用し、該ホットメルト接着剤を、ノズルから吐出した後に冷却することにより、前記
ホットメルト接着剤の温度を、外被材の耐熱温度以下として、該外被材に塗布したので、
ガスバリア性を有する外被材の過熱不良の低減が図れる信頼性の高い真空断熱材真空断熱
材及び真空断熱材を用いた冷蔵庫を提供できる。 The invention according to claim 5 of the present invention uses a synthetic rubber-based hot melt adhesive as an adhesive member, and the hot melt adhesive is cooled after being discharged from a nozzle. Since the temperature of was applied to the jacket material as the heat resistance temperature of the jacket material or less,
A highly reliable vacuum heat insulating material that can reduce overheating failure of a jacket material having gas barrier properties, and a refrigerator using the vacuum heat insulating material can be provided.

本発明によれば、真空断熱材の総合断熱性能の減少を防ぎ、省エネに寄与する真空断熱材、及び真空断熱材を用いた冷蔵庫、並びに真空断熱材の製造方法を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the reduction | decrease of the comprehensive heat insulation performance of a vacuum heat insulating material can be prevented, the vacuum heat insulating material which contributes to energy saving, the refrigerator using a vacuum heat insulating material, and the manufacturing method of a vacuum heat insulating material can be provided.

本発明の第一の実施例を示す冷蔵庫の要部の縦断面図。The longitudinal cross-sectional view of the principal part of the refrigerator which shows the 1st Example of this invention. 図１におけるＡ−Ａ線の要部の断面図。Sectional drawing of the principal part of the AA in FIG. 本発明の第一の実施例を示す真空断熱材の要部の断面図。Sectional drawing of the principal part of the vacuum heat insulating material which shows the 1st Example of this invention. 本発明の第二の実施例を示す真空断熱材の要部の断面図。Sectional drawing of the principal part of the vacuum heat insulating material which shows the 2nd Example of this invention. 本発明の第三の実施例における真空断熱材の製造工程説明図。Explanatory drawing of the manufacturing process of the vacuum heat insulating material in the 3rd Example of this invention. 本発明の第三の実施例における真空断熱材の製造工程説明図。Explanatory drawing of the manufacturing process of the vacuum heat insulating material in the 3rd Example of this invention. 本発明の第三の実施例における真空断熱材の製造工程説明図。Explanatory drawing of the manufacturing process of the vacuum heat insulating material in the 3rd Example of this invention. 本発明の第三の実施例における真空断熱材の製造工程説明図。Explanatory drawing of the manufacturing process of the vacuum heat insulating material in the 3rd Example of this invention. 本発明の第三の実施例における真空断熱材の製造工程説明図。Explanatory drawing of the manufacturing process of the vacuum heat insulating material in the 3rd Example of this invention. 本発明の第三の実施例における真空断熱材の製造工程説明図。Explanatory drawing of the manufacturing process of the vacuum heat insulating material in the 3rd Example of this invention. 本発明の第三の実施例における真空断熱材の平面説明図。Plane explanatory drawing of the vacuum heat insulating material in the 3rd Example of this invention. 本発明の第四の実施例における真空断熱材の塗布工程説明図。Application | coating process explanatory drawing of the vacuum heat insulating material in the 4th Example of this invention. 従来例の真空断熱材の要部の斜視図。The perspective view of the principal part of the vacuum heat insulating material of a prior art example. 従来例の真空断熱材の要部の断面図。Sectional drawing of the principal part of the vacuum heat insulating material of a prior art example.

以下本発明の実施の形態について、図１から図１２を用いて説明する。   Hereinafter, embodiments of the present invention will be described with reference to FIGS.

本発明の第一の実施例について、図面を参照しながら説明する。   A first embodiment of the present invention will be described with reference to the drawings.

図１は本発明の第一の実施例を示す冷蔵庫の要部の縦断面図であり、図２は図１におけるＡ−Ａ線の要部の断面図である。   FIG. 1 is a longitudinal sectional view of an essential part of a refrigerator showing a first embodiment of the present invention, and FIG. 2 is a sectional view of an essential part of the AA line in FIG.

先ず、図１に示すように、１０は冷蔵庫箱体であり、外板１１と内板１２とを備え、外板１１と内板１２とによって形成される空間の外板１１側または内板１２側に真空断熱材３０或いは４０を設置し、真空断熱材３０或いは４０以外の空間にウレタン等の発泡断熱材１３を充填してある。冷蔵庫箱体１０は、その内部に冷蔵温度室１４と、製氷室や冷凍室を有する冷凍温度室１５とをそれぞれ区画形成している。１８は冷蔵庫を所定の温度に冷却する冷却器であり、１９は冷却器１８と圧縮機２０とを含み図示しない一連の冷凍サイクルの一部を構成する配管である。１６は冷却器１８にて冷却した冷気を冷蔵庫庫内に循環して所定の低温温度を保持する送風機である。１７は送風機１６の配線コードである。   First, as shown in FIG. 1, reference numeral 10 denotes a refrigerator box, which includes an outer plate 11 and an inner plate 12, and a space formed by the outer plate 11 and the inner plate 12 on the outer plate 11 side or the inner plate 12. A vacuum heat insulating material 30 or 40 is provided on the side, and a space other than the vacuum heat insulating material 30 or 40 is filled with a foam heat insulating material 13 such as urethane. The refrigerator box 10 has a refrigeration temperature chamber 14 and a refrigeration temperature chamber 15 having an ice making chamber and a freezer compartment formed therein. Reference numeral 18 denotes a cooler that cools the refrigerator to a predetermined temperature, and reference numeral 19 denotes a pipe that includes the cooler 18 and the compressor 20 and constitutes a part of a series of refrigeration cycles (not shown). Reference numeral 16 denotes a blower that keeps a predetermined low temperature by circulating the cool air cooled by the cooler 18 into the refrigerator cabinet. Reference numeral 17 denotes a wiring cord of the blower 16.

真空断熱材３０はウレタン等の発泡断熱材１３より熱伝導率の小さい真空断熱材であり、真空断熱材３０は図２に示す如く、芯材３１と芯材３１を被覆する外被材３２とから構成し、外被材３２の内部を減圧密封するときに、外被材３２の芯材３１表面よりはみ出す所を耳部３３となし、耳部３３を真空断熱材表面側に重ね合わせ密着するように折り曲げて、この折り曲げ部の耳部３３と真空断熱材表面との間に接着部材３６を介在させて、耳部３３と真空断熱材表面との間の空気層を小さくするように形成して、耳部３３が発泡断熱材１３側となるように、発泡断熱材１３内に設置されている。   The vacuum heat insulating material 30 is a vacuum heat insulating material having a lower thermal conductivity than the foam heat insulating material 13 such as urethane, and the vacuum heat insulating material 30 includes a core material 31 and a jacket material 32 covering the core material 31 as shown in FIG. When the inside of the jacket material 32 is sealed under reduced pressure, the ear portion 33 is formed to protrude from the surface of the core material 31 of the jacket material 32, and the ear portion 33 is overlapped and adhered to the surface side of the vacuum heat insulating material. The adhesive member 36 is interposed between the ear 33 of the bent portion and the surface of the vacuum heat insulating material so as to reduce the air layer between the ear 33 and the surface of the vacuum heat insulating material. And the ear | edge part 33 is installed in the foam heat insulating material 13 so that it may become the foam heat insulating material 13 side.

また、真空断熱材３０は図３に示すように構成されている。   Moreover, the vacuum heat insulating material 30 is comprised as shown in FIG.

図３は本発明の第一の実施例を示す真空断熱材３０の要部の断面図である。   FIG. 3 is a cross-sectional view of the main part of the vacuum heat insulating material 30 showing the first embodiment of the present invention.

図３において、３１は断熱性を有する繊維材料で形成された芯材であり、３２は芯材３１を被覆するガスバリア性を有する複層のラミネートフィルムで形成された外被材である。外被材３２は、真空断熱材３０を高真空度に保持できるように、中間層にガスバリア性を確保するためのアルミ箔やアルミ蒸着層等を有し、その最外層に耐突き刺し性を有するナイロン樹脂やポリエチレンテレフタレート樹脂等の層を有し、その最内層に高密度ポリエチレン樹脂等の熱溶着可能な合成樹脂層を有して形成されている。   In FIG. 3, 31 is a core material formed of a fiber material having heat insulation properties, and 32 is a jacket material formed of a multi-layer laminate film having gas barrier properties that covers the core material 31. The jacket material 32 has an aluminum foil or an aluminum vapor deposition layer for securing a gas barrier property in the intermediate layer so that the vacuum heat insulating material 30 can be maintained at a high degree of vacuum, and the outermost layer has puncture resistance. It has a layer such as nylon resin or polyethylene terephthalate resin, and the innermost layer is formed with a heat-weldable synthetic resin layer such as high-density polyethylene resin.

３３は、外被材３２の内部を減圧密封するときに、外被材３２の芯材３１表面よりはみ出した部分である「耳部」であり、耳部３３を真空断熱材表面側３０aに重ね合わせ密着するように折り曲げて、この折り曲げ部の耳部３３と真空断熱材表面３０aとの間に接着部材３６を介在させて、耳部３３と真空断熱材表面３０aとの間の空気層３０bを小さくするように形成してある。また、同時に、折り曲げ部の耳部３３と真空断熱材側壁表面３０cとの間に接着部材３６を介在させて、耳部３３と真空断熱材側壁表面３０cとの間の空気層３０eを小さくするように形成してある。   Reference numeral 33 denotes an “ear part” which is a part protruding from the surface of the core material 31 of the jacket material 32 when the inside of the jacket material 32 is sealed under reduced pressure, and the ear part 33 is overlapped on the vacuum heat insulating material surface side 30a. The air layer 30b between the ear portion 33 and the vacuum heat insulating material surface 30a is formed by interposing the adhesive member 36 between the ear portion 33 of the bent portion and the vacuum heat insulating material surface 30a. It is formed to be small. At the same time, an adhesive member 36 is interposed between the bent ear portion 33 and the vacuum heat insulating material side wall surface 30c to reduce the air layer 30e between the ear portion 33 and the vacuum heat insulating material side wall surface 30c. Is formed.

３４は前述の熱溶着可能な合成樹脂層部で熱溶着した熱溶着部であり、熱溶着部３４は前述の耳部３３の一部として形成されている。換言すれば、外被材３２の内部を減圧密封するために、外被材３２周縁に熱溶着部３４を形成して内部の高真空度を保持するように構成してある。なお、通常は熱溶着部３４は耳部３３の一部として構成されるが、外被材３２を、二辺を折り曲げたピロー型の袋形状に形成したときは、熱溶着部３４は耳部３３の一部として構成されるとは限らないことは自明である。   Reference numeral 34 denotes a heat-welded portion that is heat-welded with the above-described heat-weldable synthetic resin layer portion, and the heat-welded portion 34 is formed as a part of the ear portion 33 described above. In other words, in order to seal the inside of the jacket material 32 under reduced pressure, the heat welding portion 34 is formed on the periphery of the jacket material 32 so as to maintain a high degree of vacuum inside. In general, the heat-welded portion 34 is configured as a part of the ear portion 33. However, when the outer covering material 32 is formed in a pillow-shaped bag shape with two sides bent, the heat-welded portion 34 is the ear portion. It is self-evident that it is not necessarily configured as a part of 33.

以上、本発明の第一の実施例は、図３に示すように、複層のラミネートフィルムで形成された、かなりの剛性を有する耳部３３が、接着部材３６により、真空断熱材に固着されるので、耳部３３と真空断熱材の表面や側壁表面との間の間隙３０bや間隙３０eの大きさが減少し、この間隙に滞留する断熱性能の悪い空気層が減少するので、トータルとしての熱漏洩が減少する真空断熱材及び該真空断熱材を用いた冷蔵庫を提供できる。   As described above, in the first embodiment of the present invention, as shown in FIG. 3, the ear portion 33 formed of a multilayer laminate film and having a considerable rigidity is fixed to the vacuum heat insulating material by the adhesive member 36. Therefore, the size of the gap 30b and the gap 30e between the ear 33 and the surface of the vacuum heat insulating material and the side wall surface is reduced, and the air layer having poor heat insulation performance staying in the gap is reduced. A vacuum heat insulating material with reduced heat leakage and a refrigerator using the vacuum heat insulating material can be provided.

また、剛性のある外被材の耳部３３が真空断熱材自身に密着するので、真空断熱材自身の強度が向上する。また、真空断熱材自身の製造工程や運搬・保管工程等のハンドリングによる変形や経時変化が少ないので、ハンドリング性の良い真空断熱材及び真空断熱材を用いた冷蔵庫を提供できる。   Moreover, since the ear | edge part 33 of a rigid jacket material closely_contact | adheres to vacuum heat insulating material itself, the intensity | strength of vacuum heat insulating material itself improves. Moreover, since there are few deformation | transformation and time-dependent changes by handling, such as a manufacturing process of a vacuum heat insulating material itself, a conveyance, and a storage process, the refrigerator using a vacuum heat insulating material with good handleability and a vacuum heat insulating material can be provided.

また、従来構造では、前述の耳部を覆う固定テープと発泡断熱材との接着力が弱かったが、本発明の構成では、図３に示すように、耳部３３を覆うものが無いので、耳部３３全体が前述の発泡断熱材と強力に接着するために、かつ、真空断熱材３０が、剛性のある外被材の耳部３３により補強されるので、箱体強度の強い断熱壁を有する冷蔵庫を提供できる。   Further, in the conventional structure, the adhesive force between the fixing tape covering the above-described ear portion and the foam heat insulating material was weak, but in the configuration of the present invention, there is nothing to cover the ear portion 33 as shown in FIG. Since the entire ear portion 33 is strongly bonded to the above-described foamed heat insulating material, and the vacuum heat insulating material 30 is reinforced by the ear portion 33 of a rigid jacket material, a heat insulating wall having a strong box body strength is provided. The refrigerator which has can be provided.

また、接着部材３６は、耳部３３の端部から真空断熱材３０の側部にわたって塗られていることが望ましい。耳部３３のうち真空断熱材表面３０a側に折り曲げられた部分が接着部材３６によって全面的に真空断熱材３０aに接着されていると、真空断熱材表面３０aにおける耳部３３のしわや変形を防止することができる。また、真空断熱材３０の角部が耳部３３によって覆われ、この角部が耳部３３と接着部材３６とによって覆われていれば、衝突による外被材３２の破損防止の効果が向上する。さらに、側部まで接着部材３６が塗られていると、間隙３０ｅから何らかの衝撃によって接着部材３６による接着を剥がす方向への力が加わった場合でも、これを防止する効果が向上する。   Moreover, it is desirable that the adhesive member 36 is applied from the end portion of the ear portion 33 to the side portion of the vacuum heat insulating material 30. When the portion of the ear 33 that is bent toward the vacuum heat insulating material surface 30a is adhered to the vacuum heat insulating material 30a entirely by the adhesive member 36, wrinkles and deformation of the ear 33 on the vacuum heat insulating material surface 30a are prevented. can do. Moreover, if the corner | angular part of the vacuum heat insulating material 30 is covered with the ear | edge part 33 and this corner | angular part is covered with the ear | edge part 33 and the adhesive member 36, the effect of preventing damage to the jacket material 32 due to a collision will be improved. . Furthermore, when the adhesive member 36 is applied to the side, even if a force in the direction of peeling off the adhesion by the adhesive member 36 is applied from the gap 30e by some impact, the effect of preventing this is improved.

次に本発明の第二の実施例について図４及び前述の図２により説明する。なお、第一の実施例と同一構成については、同一符号を付して詳細な説明を省略する。   Next, a second embodiment of the present invention will be described with reference to FIG. 4 and FIG. In addition, about the same structure as a 1st Example, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

図４は本発明の第二の実施例を示す真空断熱材の要部の断面図である。図４において、４１は断熱性を有する繊維材料で形成された芯材であり、４２は芯材４１を被覆するガスバリア性を有する複層のラミネートフィルムで形成された外被材である。外被材４２は、真空断熱材４０を高真空度に保持できるように、中間層にガスバリア性を確保するためのアルミニウム等の金属箔やアルミ蒸着層等を有し、その最外層に耐突き刺し性を有するナイロン樹脂やポリエチレンテレフタレート樹脂等の層を有し、その最内層に高密度ポリエチレン樹脂やポリアクリロニトリル樹脂等の熱溶着可能な合成樹脂層を有して形成されている。   FIG. 4 is a cross-sectional view of the main part of the vacuum heat insulating material showing the second embodiment of the present invention. In FIG. 4, reference numeral 41 denotes a core material formed of a fiber material having a heat insulating property, and reference numeral 42 denotes an outer cover material formed of a multilayer laminate film having a gas barrier property that covers the core material 41. The jacket material 42 has a metal foil such as aluminum or an aluminum vapor deposition layer for securing a gas barrier property in the intermediate layer so that the vacuum heat insulating material 40 can be maintained at a high degree of vacuum, and the outermost layer is puncture-resistant. It has a layer such as a nylon resin or a polyethylene terephthalate resin, and has a synthetic resin layer such as a high-density polyethylene resin or a polyacrylonitrile resin as the innermost layer.

４３は、外被材４２の内部を減圧密封するときに、外被材４２の芯材４１表面よりはみ出した部分である「耳部」であり、耳部４３を真空断熱材側面壁表面４０cに重ね合わせ密着するように折り曲げて、この折り曲げ部の耳部４３と真空断熱材側面壁表面４０cとの間に接着部材４６を介在させて、耳部４３と真空断熱材側面壁表面４０cとの間の空気層４０bを小さくするように形成してある。   Reference numeral 43 denotes an “ear part” that is a portion of the outer cover member 42 that protrudes from the surface of the core member 41 when the inside of the outer cover member 42 is sealed under reduced pressure. It is bent so as to be in close contact with each other, and an adhesive member 46 is interposed between the ear 43 of the bent portion and the side wall surface 40c of the vacuum heat insulating material, and between the ear 43 and the side wall surface 40c of the vacuum heat insulating material. The air layer 40b is formed to be small.

４４は前述の熱溶着可能な合成樹脂層部で熱溶着した熱溶着部であり、熱溶着部４４は前述の耳部４３の一部として形成されている。換言すれば、外被材４２の内部を減圧密封するために、外被材４２周縁に熱溶着部４４を形成して内部の高真空度を保持するように構成してある。   Reference numeral 44 denotes a heat-welded portion that is heat-welded with the above-described heat-weldable synthetic resin layer portion, and the heat-welded portion 44 is formed as a part of the aforementioned ear portion 43. In other words, in order to seal the inside of the jacket material 42 under reduced pressure, a heat welding portion 44 is formed on the periphery of the jacket material 42 to maintain a high degree of vacuum inside.

なお、第二の実施例の特徴とするところは、図４に示す真空断熱材４０の厚さ寸法Ｔ２が比較的厚い場合であり、かつ、外被材４２の構成を袋状とせずに、二枚のシート状外被材の原料の間に芯材４１の原料を設置した後、このシート状外被材の周縁４４部を熱溶着することにより、熱溶着部４４寸法Ｌ4を小さくすると同時に、耳部４３寸法Ｌ３を小さくした例である。   The characteristic of the second embodiment is that the thickness T2 of the vacuum heat insulating material 40 shown in FIG. 4 is relatively thick, and the configuration of the covering material 42 is not bag-shaped. After the raw material of the core material 41 is installed between the raw materials of the two sheet-like outer covering materials, the peripheral edge 44 portion of the sheet-like outer covering material is thermally welded, thereby simultaneously reducing the size L4 of the heat welding portion 44. This is an example in which the ear portion 43 dimension L3 is reduced.

以上、本発明の第二の実施例は、図４に示すように、複層のラミネートフィルムで形成された、かなりの剛性を有する耳部４３が、接着部材４６により、真空断熱材に固着されるので、耳部４３と真空断熱材の側壁表面との間の間隙４０bや間隙４０eの大きさが減少し、この間隙に滞留する断熱性能の悪い空気層が減少するので、トータルとしての熱漏洩が減少する真空断熱材及び真空断熱材を用いた冷蔵庫を提供できる。   As described above, in the second embodiment of the present invention, as shown in FIG. 4, the ear part 43 formed of a multilayer laminate film and having a considerable rigidity is fixed to the vacuum heat insulating material by the adhesive member 46. Therefore, the size of the gap 40b and the gap 40e between the ear portion 43 and the side wall surface of the vacuum heat insulating material is reduced, and the air layer with poor heat insulation performance that stays in the gap is reduced, so that the total heat leakage It is possible to provide a vacuum heat insulating material and a refrigerator using the vacuum heat insulating material.

また、剛性のある外被材の耳部４３が真空断熱材自身に密着するので、真空断熱材自身の強度が向上する。また、真空断熱材自身の製造工程や運搬・保管工程等のハンドリングによる変形や経時変化が少ないので、ハンドリング性の良い真空断熱材及び真空断熱材を用いた冷蔵庫を提供できる。   Moreover, since the ear | edge part 43 of a rigid jacket material closely_contact | adheres to vacuum heat insulating material itself, the intensity | strength of vacuum heat insulating material itself improves. Moreover, since there are few deformation | transformation and time-dependent changes by handling, such as a manufacturing process of a vacuum heat insulating material itself, a conveyance, and a storage process, the refrigerator using a vacuum heat insulating material with good handleability and a vacuum heat insulating material can be provided.

また、従来構造では、前述の耳部を覆う固定テープとウレタン等の発泡断熱材との接着力が弱かったが、本発明の構成では、図４に示すように、耳部４３を覆うものが無いので、耳部４３全体が前述の発泡断熱材と強力に接着するために、かつ、真空断熱材４０が、剛性のある外被材の耳部４３により補強されるので、箱体強度の強い断熱壁を有する冷蔵庫を提供できる。   Further, in the conventional structure, the adhesive force between the fixing tape covering the above-described ear portion and the foamed heat insulating material such as urethane is weak, but in the configuration of the present invention, as shown in FIG. Since the entire ear portion 43 is strongly bonded to the above-described foam heat insulating material and the vacuum heat insulating material 40 is reinforced by the ear portion 43 of the rigid jacket material, the strength of the box is strong. A refrigerator having a heat insulating wall can be provided.

また、本実施例のように、耳部４３寸法Ｌ３と真空断熱材４０の厚さ寸法Ｔ３との関係により、真空断熱材４０側部内に耳部４３の端部が接着され、真空断熱材表面４０cまで耳部４３が届かない場合は、真空断熱材表面４０cのいずれの面（すなわち、表面と裏面）にも耳部による段差がなくなり、耳部の変形やしわによるウレタンの充填流動を阻害することもない。また、平坦性がよくなることから、外板１１に真空断熱材を貼り付ける場合の接着性が向上し、耳部の段差による外観への影響もなく、さらに貼り付け面と反対側の発泡断熱材の流動性も向上する。   Further, as in the present embodiment, the end portion of the ear portion 43 is bonded to the side portion of the vacuum heat insulating material 40 due to the relationship between the ear portion 43 size L3 and the thickness dimension T3 of the vacuum heat insulating material 40, and the surface of the vacuum heat insulating material. When the ear part 43 does not reach 40c, there is no step due to the ear part on any surface of the vacuum heat insulating material surface 40c (that is, the front surface and the back surface), and the urethane filling flow due to the deformation or wrinkle of the ear part is obstructed. There is nothing. In addition, since the flatness is improved, the adhesiveness when the vacuum heat insulating material is attached to the outer plate 11 is improved, the appearance of the step of the ear is not affected, and the foam heat insulating material on the side opposite to the attaching surface is further provided. The fluidity of the is also improved.

次に本発明の第三の実施例について図５から図１１により説明する。なお、第一の実施例と同一構成については、同一符号を付して詳細な説明を省略する。   Next, a third embodiment of the present invention will be described with reference to FIGS. In addition, about the same structure as a 1st Example, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

先ず、図５乃至１０により製造工程例を説明する。   First, an example of a manufacturing process will be described with reference to FIGS.

図５乃至１０は本発明の一実施例における真空断熱材の製造工程説明図であり、製造工程順に表したものである。先ず図５に示す芯材挿入工程において、５１aは、繊維材料の原綿にバインダーをつけて形成する芯材成形工程により形成された芯材原料である。芯材原料５１aの作成方法例の一つとしては、例えば、原綿として「人造鉱物繊維保温材」（JISA9504）を使用し、この原綿を所定枚数積層し常温プレス加工した後、ホウ酸やリン酸等の無機バインダー液を含浸させる。原綿中の無機バインダーが所定の含浸率になったら、この無機バインダーが含浸した原綿を熱プレス加工した後、130℃から150℃の乾燥炉内で約1時間程度の乾燥を行って、所定寸法に切断して芯材原料５１aとする。   FIG. 5 thru | or 10 is explanatory drawing of the manufacturing process of the vacuum heat insulating material in one Example of this invention, and represents it in order of the manufacturing process. First, in the core material insertion step shown in FIG. 5, 51a is a core material raw material formed by a core material molding step that is formed by attaching a binder to a raw cotton fiber material. One example of a method for producing the core material 51a is, for example, using “artificial mineral fiber heat insulating material” (JISA9504) as raw cotton, laminating a predetermined number of raw cottons, and pressing them at room temperature, followed by boric acid or phosphoric acid. Impregnation with an inorganic binder liquid such as When the inorganic binder in the raw cotton reaches a predetermined impregnation rate, the raw cotton impregnated with this inorganic binder is hot-pressed and then dried in a drying furnace at 130 ° C to 150 ° C for about 1 hour to obtain the specified dimensions. To obtain a core material 51a.

但し、芯材の使用用途によって、芯材自身に可撓性を持たせる場合は、上記の工程後、バインダーをつけない繊維材料からなる原綿で、前述の芯材原料５１aを覆うように形成して、芯材原料５１a表面に可撓性を有する層を設けることが望ましい。   However, if the core material itself is to be flexible depending on the intended use of the core material, it is formed so as to cover the above-mentioned core material material 51a with a raw material made of fiber material without a binder after the above process. Thus, it is desirable to provide a flexible layer on the surface of the core material 51a.

５２は、ガスバリア性を有するラミネートフィルムからなる外被材であり、外被材５２の中に芯材原料５１aを配置する。   52 is a jacket material made of a laminate film having gas barrier properties, and a core material 51a is disposed in the jacket material 52.

なお、芯材原料５１aを、外被材５２内に配置する方法の一実施例として、図５に示すように外被材５２を袋状にしたのち、この袋状外被材の開口５２aから芯材原料５１aを挿入する方法でも良く、あるいは、外被材５２を二枚のシート状として、このシート状外被材の間に芯材原料５１aを配置した後、この二枚のシート状の各辺を溶着する連続成形方式でも良く、或いは、ピロー式袋状外被材の間に芯材原料５１aを配置した後、袋の各辺を溶着する方式でも良い。   As an example of a method for disposing the core material 51a in the jacket material 52, after forming the jacket material 52 into a bag shape as shown in FIG. 5, the opening 52a of the bag-like jacket material is used. A method of inserting the core material 51a may be used. Alternatively, the jacket material 52 is formed into two sheets, and after the core material 51a is disposed between the sheet-like jacket materials, A continuous molding method in which each side is welded may be used, or a method in which each side of the bag is welded after the core material 51a is disposed between the pillow-type bag-shaped jacket materials.

次に図６について説明する。   Next, FIG. 6 will be described.

図６は前述したように、外被材５２の中に芯材原料５１aを配置した状態の要部断面図を示すものである。   FIG. 6 shows a cross-sectional view of the main part in a state where the core material 51a is arranged in the jacket material 52 as described above.

５２は前述したように、芯材原料５１aを被覆するガスバリア性を有する複層のラミネートフィルムで形成された外被材である。外被材５２は、真空断熱材を高真空度に保持できるように、中間層５２bにガスバリア性を確保するためのアルミニウム等の金属箔やアルミ蒸着層等を有し、その最外層５２cに耐突き刺し性を有するナイロン樹脂やポリエチレンテレフタレート樹脂等の層を有し、その最内層５２aに高密度ポリエチレン樹脂やポリアクリロニトリル樹脂等の熱溶着可能な合成樹脂層を有して形成されている。従って、外被材５２は、複層のラミネートフィルムで形成されているので、それ自身である程度の剛性を有している。   As described above, 52 is a jacket material formed of a multilayer laminate film having a gas barrier property that covers the core material 51a. The covering material 52 has a metal foil such as aluminum or an aluminum vapor deposition layer for securing a gas barrier property in the intermediate layer 52b so that the vacuum heat insulating material can be maintained at a high degree of vacuum, and the outermost layer 52c is resistant to the outer layer 52c. It has a layer such as a piercing nylon resin or polyethylene terephthalate resin, and the innermost layer 52a has a heat-weldable synthetic resin layer such as a high-density polyethylene resin or polyacrylonitrile resin. Therefore, since the jacket material 52 is formed of a multilayer laminate film, it has a certain degree of rigidity.

５４は外被材５２の周縁を熱溶着可能な合成樹脂層で熱溶着した熱溶着部であり、その幅寸法Ｌ6やＬ8は、後述する真空断熱材内部の高真空度を長期間保持するに十分な寸法に設定されている。例えば前記Ｌ6寸法やＬ8寸法は、通常は３ｍｍから１２ｍｍ程度が望ましいが特に限定するものではない。   Reference numeral 54 denotes a heat-welded portion obtained by heat-welding the peripheral edge of the outer covering material 52 with a synthetic resin layer that can be heat-welded. The width dimensions L6 and L8 maintain a high degree of vacuum inside the vacuum heat insulating material described later for a long time. It is set to a sufficient size. For example, the L6 dimension and the L8 dimension are usually about 3 mm to 12 mm, but are not particularly limited.

次に図７の減圧密封工程について説明する。   Next, the vacuum sealing process of FIG. 7 will be described.

図７は、外被材５２の中に芯材原料５１aを配置した後、外被材５２中および芯材原料５１a中を所定の高真空度まで減圧し、この外被材の入り口５２a（図５の５２a）部を封止した状態の要部断面図である。   In FIG. 7, after arranging the core material 51a in the jacket material 52, the inside of the jacket material 52 and the core material 51a are depressurized to a predetermined high vacuum degree, and the inlet 52a (see FIG. It is principal part sectional drawing of the state which sealed the 52a) part of FIG.

図において、５３は外被材５２の内部を、前述したように減圧密封したときに、外被材５２の芯材５１b表面よりはみ出した部分であり、本明細書ではこれを「耳部」と表示する。耳部５３は、前述したように、外被材５２自身が剛性を有しているので、且つ、耳部５３は剛性を有する外被材５２が二重に形成されているので、耳部５３はかなりの剛性を有している。   In the figure, reference numeral 53 denotes a portion that protrudes from the surface of the core material 51b of the jacket material 52 when the inside of the jacket material 52 is sealed under reduced pressure as described above. In this specification, this is referred to as an “ear part”. indicate. As described above, since the outer covering material 52 itself has rigidity, the ear 53 has a double outer covering 52 having rigidity. Has considerable rigidity.

また、耳部５３の周縁に形成された前述の熱溶着部５４は、かなりの剛性を有する耳部が熱溶着されているので、更にかなりの剛性を有していることは自明である。   Further, it is obvious that the above-mentioned heat-welded portion 54 formed on the periphery of the ear portion 53 has a further considerable rigidity because the ear portion having a considerable rigidity is heat-welded.

なお、耳部５３の幅寸法Ｌ5やＬ7は、前述したように、芯材原料５１a中および外被材５２中を所定の高真空度まで減圧し密封した時に、図６にて説明した芯材原料５１aの厚さ寸法Ｔ3が、図７にて表示する芯材５１bの厚さ寸法Ｔ4に圧縮（Ｔ4＜Ｔ3）されるために、前述の熱溶着部幅寸法Ｌ6やＬ8より大きくなる。つまり、Ｌ5＞Ｌ6、Ｌ7＞Ｌ8の関係となる。従って、真空断熱材５０の周辺に、図示しないウレタン等の発泡断熱材を充填するときには、耳部５３が、発泡断熱材の充填流動を阻害する確率が大きくなるので、後述するように、耳部５３を真空断熱材５０の表面側に重ねあうように折り曲げて構成されている。   As described above, the width dimensions L5 and L7 of the ear portion 53 are the core material described in FIG. 6 when the core material 51a and the jacket material 52 are depressurized to a predetermined high vacuum and sealed. Since the thickness dimension T3 of the raw material 51a is compressed to the thickness dimension T4 of the core material 51b shown in FIG. 7 (T4 <T3), it becomes larger than the above-mentioned heat welded portion width dimensions L6 and L8. That is, L5> L6 and L7> L8. Therefore, when filling the periphery of the vacuum heat insulating material 50 with a foam heat insulating material such as urethane (not shown), there is a high probability that the ear portion 53 impedes the filling flow of the foam heat insulating material. 53 is bent so as to overlap the surface side of the vacuum heat insulating material 50.

次に図８の塗布工程について説明する。なお、図６、図７と同一構成については、同一符号を付して詳細な説明を省略する。   Next, the coating process of FIG. 8 will be described. In addition, about the same structure as FIG. 6, FIG. 7, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

図８は、図７に示したように形成し、固定用冶具６４上に所定の角度で固定された真空断熱材５０の耳部５３に、接着部材を塗布する塗布工程を説明するものであり、６１は、合成ゴム系のホットメルト接着剤等の接着部材６２を所定温度で融解し、所定の量を吐出するように構成されたノズル機構である。６３は接着部材６２を所定の温度まで低下させるための冷却用空気であり、前述のノズル機構６１に図示しない機構によって付与されている。つまり、ノズル機構６１より吐出された直後の高温の接着部材６２a部の温度（例えば１６０℃程度）を冷却して、外被材表面に到達した時の接着部材６２c部の温度を、前述の外被材自身の耐熱温度以下（例えば80℃程度以下）に冷却できるように、冷却用空気６３を所定の温度や吐出風量に設定してある。   FIG. 8 illustrates an application process in which an adhesive member is applied to the ear 53 of the vacuum heat insulating material 50 formed as shown in FIG. 7 and fixed on the fixing jig 64 at a predetermined angle. , 61 is a nozzle mechanism configured to melt an adhesive member 62 such as a synthetic rubber-based hot melt adhesive at a predetermined temperature and discharge a predetermined amount. 63 is cooling air for lowering the adhesive member 62 to a predetermined temperature, and is given to the nozzle mechanism 61 by a mechanism (not shown). That is, the temperature of the high-temperature adhesive member 62a immediately after being discharged from the nozzle mechanism 61 (for example, about 160 ° C.) is cooled, and the temperature of the adhesive member 62c when the temperature reaches the outer cover material surface is set to the above-described external temperature. The cooling air 63 is set to a predetermined temperature and discharge air volume so that it can be cooled below the heat resistance temperature of the workpiece itself (for example, about 80 ° C. or less).

なお、冷却用空気６３を所定の傾斜角度にて吐出することにより、接着部材６２が、ノズル機構６１より吐出された後に、図８に示すように螺旋状部６２bを形成するようにすると、外被材自身の耐熱温度以下（例えば80℃程度以下）に容易に冷却できるが、その方式は特に限定するものではない。   When the cooling member 63 is discharged at a predetermined inclination angle so that the adhesive member 62 is discharged from the nozzle mechanism 61 to form the spiral portion 62b as shown in FIG. Although it can be easily cooled below the heat resistance temperature of the workpiece itself (for example, about 80 ° C. or less), the method is not particularly limited.

また、接着部材６２を塗布する位置としては、耳部表面５３aのみでも良く、或いは、この耳部が密着する真空断熱材表面５０cや５０aのみでも良く、或いは、耳部表面５３aとこの耳部が密着する真空断熱材表面５０cや５０aとの両方に塗布しても良い。   Further, the position where the adhesive member 62 is applied may be only the ear surface 53a, or only the vacuum heat insulating material surfaces 50c and 50a to which the ear portion is in close contact, or the ear surface 53a and the ear portion may be located. You may apply | coat to both the vacuum heat insulating material surfaces 50c and 50a which adhere.

次に図９及び図１０の折り曲げ・接着工程について説明する。なお、図８と同一構成については、同一符号を付して詳細な説明を省略する。   Next, the bending / bonding process of FIGS. 9 and 10 will be described. In addition, about the same structure as FIG. 8, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

図９から図１０は、図８に示したように接着部材を塗布された真空断熱材５０を、曲げ固定用下冶具６６と曲げ固定用上冶具６７との間に所定の角度で固定し、耳部５３を真空断熱材表面側に重ねあうように折り曲げる過程を示すものである。６５は耳折り曲げ機構であり、耳折り曲げ機構６５を図９から図１０に示すように動作させることによって、耳部５３を真空断熱材表面５０cや５０aと重ねあうように折り曲げ、かつ、前述の塗布工程で塗布した接着部材６２cの接着力により、耳部５３と真空断熱材表面５０cや５０aとを密着している。   9 to 10, the vacuum heat insulating material 50 applied with the adhesive member as shown in FIG. 8 is fixed at a predetermined angle between the bending and fixing lower jig 66 and the bending and fixing upper jig 67. The process which bend | folds so that the ear | edge part 53 may overlap with the vacuum heat insulating material surface side is shown. Reference numeral 65 denotes an ear folding mechanism. By operating the ear folding mechanism 65 as shown in FIGS. 9 to 10, the ear portion 53 is folded so as to overlap the vacuum heat insulating material surfaces 50c and 50a, and the above-described application is performed. The ear 53 and the vacuum heat insulating material surfaces 50c and 50a are brought into close contact with each other by the adhesive force of the adhesive member 62c applied in the process.

換言すれば、耳部５３と真空断熱材表面５０cや５０aとの間の空気層５０eや５０bを小さくするように、耳部５３と真空断熱材表面５０cや５０aとを密着するように、耳折り曲げ機構６５で前記耳部５３に押し圧力を加えながら、耳部５３を折り曲げるように構成してある。   In other words, the ear bending is performed so that the ear portion 53 and the vacuum heat insulating material surfaces 50c and 50a are in close contact so that the air layers 50e and 50b between the ear portion 53 and the vacuum heat insulating material surfaces 50c and 50a are reduced. The mechanism 53 is configured to bend the ear 53 while applying pressure to the ear 53.

図１１は、以上のように製造した真空断熱材の一実施例を示す平面説明図である。   FIG. 11 is an explanatory plan view showing an embodiment of the vacuum heat insulating material manufactured as described above.

図１１において、５０は略矩形状をした真空断熱材５０であり、その長辺５０f側の耳部５３bを図５で示した前述の接着部材６２を使用して形成してあり、その短辺５０g側の耳部５３cは従来例と同様な固定テープ５５で覆うように固定してある。   In FIG. 11, reference numeral 50 denotes a vacuum heat insulating material 50 having a substantially rectangular shape, and an ear portion 53b on the long side 50f side is formed using the adhesive member 62 shown in FIG. The ear portion 53c on the 50g side is fixed so as to be covered with a fixing tape 55 similar to the conventional example.

また、図１１に示すＢ−Ｂ線の断面は図１０と同様な断面として構成されている。従って、真空断熱材５０周辺に図示しない発泡断熱材を充填して断熱壁を構成する場合、この発泡断熱材自身の接着力により、長辺側の耳部５３bと発泡断熱材とが強力に接着されるので、断熱壁の強度が向上する。   Moreover, the cross section of the BB line shown in FIG. 11 is comprised as a cross section similar to FIG. Therefore, when a heat insulating wall is formed by filling a foam heat insulating material (not shown) around the vacuum heat insulating material 50, the long side ear portion 53b and the foam heat insulating material are strongly bonded by the adhesive force of the foam heat insulating material itself. Therefore, the strength of the heat insulating wall is improved.

以上、本発明の第三の実施例は、図５乃至図１１に示すように、耳部を真空断熱材表面側に重ねあうように折り曲げて、耳部、或いは、耳部が密着する真空断熱材表面、或いは、耳部と耳部が密着する真空断熱材表面に接着部材を塗布する塗布工程を有し、この塗布工程により塗布した接着部材の接着力により、真空断熱材表面と耳部とを接着する工程で接着し密着したので、従来真空断熱材周辺に形成されていた真空断熱材より断熱性能の悪い空気分子の滞留する間隙を小さくできる。したがって、トータルとしての熱漏洩が減少する真空断熱材の製造方法を提供できる。   As described above, in the third embodiment of the present invention, as shown in FIG. 5 to FIG. 11, the ear part or the ear part is closely attached to the ear part or the ear part, as shown in FIGS. There is an application step of applying an adhesive member to the surface of the material or the vacuum heat insulating material surface where the ear portion and the ear portion are in close contact, and the adhesive force of the adhesive member applied by this application step allows the vacuum heat insulating material surface and the ear portion to As a result of adhering and adhering in the step of adhering to each other, it is possible to reduce the gap in which air molecules stay with poor heat insulation performance compared to the vacuum heat insulating material conventionally formed around the vacuum heat insulating material. Therefore, it is possible to provide a method for manufacturing a vacuum heat insulating material that reduces heat leakage as a whole.

また、剛性のある外被材からなる耳部が真空断熱材自身に密着するので、真空断熱材自身の強度が向上する。したがって、該真空断熱材自身の製造工程や運搬・保管工程等のハンドリングによる変形や経時変化が少なく、ハンドリング性の良い真空断熱材の製造方法を提供できる。   Moreover, since the ear | edge part which consists of a rigid jacket material closely_contact | adheres to vacuum heat insulating material itself, the intensity | strength of vacuum heat insulating material itself improves. Therefore, it is possible to provide a method of manufacturing a vacuum heat insulating material with good handling properties with less deformation and change over time due to handling in the manufacturing process, transportation and storage process of the vacuum heat insulating material itself.

また、接着部材として、合成ゴム系のホットメルト接着剤を使用したので、接着部材の塗布作業が容易になり、かつ、塗布時間の短縮が図れるので、接着する工程の作業能率向上および製造コスト低減の図れる真空断熱材及び真空断熱材を用いた冷蔵庫を提供できる。   Also, since a synthetic rubber-based hot melt adhesive is used as the adhesive member, the application work of the adhesive member becomes easy and the application time can be shortened, so the work efficiency of the bonding process is improved and the manufacturing cost is reduced. A vacuum heat insulating material and a refrigerator using the vacuum heat insulating material can be provided.

また、接着部材として、合成ゴム系のホットメルト接着剤を使用し、ホットメルト接着剤を、ノズルから吐出した後に冷却することにより、ホットメルト接着剤の温度を、外被材の耐熱温度以下として外被材に塗布したので、ガスバリア性を有する外被材の過熱不良の低減が図れる信頼性の高い真空断熱材及び真空断熱材を用いた冷蔵庫を提供できる。   In addition, a synthetic rubber-based hot melt adhesive is used as the adhesive member, and the hot melt adhesive is cooled after being discharged from the nozzle, so that the temperature of the hot melt adhesive is set to be equal to or lower than the heat resistant temperature of the jacket material. Since it applied to the jacket material, it is possible to provide a highly reliable vacuum heat insulating material and a refrigerator using the vacuum heat insulating material that can reduce overheating failure of the jacket material having gas barrier properties.

次に本発明の第四の実施例について図１２により説明する。なお、第三の実施例と同一構成については、同一符号を付して詳細な説明を省略する。   Next, a fourth embodiment of the present invention will be described with reference to FIG. In addition, about the same structure as a 3rd Example, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

図１２は本発明の第四の実施例における真空断熱材の塗布工程説明図であり、図８で前述した本発明の第三の実施例における真空断熱材の塗布工程と同様な断面説明図である。   FIG. 12 is an explanatory view of a vacuum heat insulating material application process in the fourth embodiment of the present invention, and is a cross-sectional explanatory view similar to the vacuum heat insulating material application process in the third embodiment of the present invention described above with reference to FIG. is there.

図１２において、６８は、合成ゴム系のホットメルト接着剤等の接着部材６９を所定温度で融解し、所定の量を複数本のノズルで同時に吐出できるように構成されたノズル機構である。６９は複数本のノズルで同時に吐出された接着部材６９を所定の温度まで低下させるための冷却用空気であり、前述のノズル機構６８に図示しない機構によって付与されている。つまり、ノズル機構６８より複数本のノズルで同時に吐出された直後の高温の接着部材６９a部の温度（例えば１６０℃程度）を冷却して、外被材表面に到達した時の接着部材６９c部の温度を、外被材自身の耐熱温度以下（例えば80℃程度以下）に冷却できるように、冷却用空気６９を所定の温度や吐出風量に設定するように構成してある。   In FIG. 12, reference numeral 68 denotes a nozzle mechanism configured to melt an adhesive member 69 such as a synthetic rubber-based hot melt adhesive at a predetermined temperature and to discharge a predetermined amount simultaneously by a plurality of nozzles. Reference numeral 69 denotes cooling air for lowering the adhesive member 69 discharged simultaneously by a plurality of nozzles to a predetermined temperature, and is provided to the nozzle mechanism 68 by a mechanism (not shown). That is, the temperature (for example, about 160 ° C.) of the high-temperature adhesive member 69a immediately after being simultaneously discharged from the nozzle mechanism 68 by a plurality of nozzles is cooled, and the adhesive member 69c portion when the temperature reaches the outer cover material surface is reduced. The cooling air 69 is set to a predetermined temperature and discharge air volume so that the temperature can be cooled below the heat resistance temperature of the jacket material itself (for example, about 80 ° C. or less).

以上にて説明した塗布工程の次に、前述の図９及び１０で説明した、折り曲げ・接着工程と同様な工程を経て、耳部５３を真空断熱材５０自身に密着するものである。   After the coating process described above, the ear 53 is brought into close contact with the vacuum heat insulating material 50 itself through the same process as the bending / bonding process described with reference to FIGS.

なお、接着部材６９を塗布する位置としては、真空断熱材５０の形状によって、耳部表面５３aのみでも良く、或いは、この耳部が密着する真空断熱材表面５０cや５０aのみでも良く、或いは、耳部表面５３aとこの耳部が密着する真空断熱材表面５０cや５０aとの両方に同時に塗布しても良い。つまり、図１０にて示した、耳部５３と真空断熱材表面５０cや５０aとの間の空気層間隙５０eや５０bを最も小さくするように、接着部材６９を塗布する位置を選定するものである。   It should be noted that the position where the adhesive member 69 is applied may be only the ear surface 53a, or only the vacuum heat insulating material surface 50c or 50a to which the ear portion is in close contact, depending on the shape of the vacuum heat insulating material 50, or the ear. It may be applied simultaneously to both the part surface 53a and the vacuum heat insulating material surfaces 50c and 50a to which the ears are in close contact. That is, the position where the adhesive member 69 is applied is selected so as to minimize the air layer gaps 50e and 50b between the ear 53 and the vacuum heat insulating material surfaces 50c and 50a shown in FIG. .

以上、本発明の第四の実施例は、図１２に示すように、接着部材として、合成ゴム系のホットメルト接着剤を使用し、ホットメルト接着剤を、ノズルから吐出した後に冷却することにより、ホットメルト接着剤の温度を、外被材の耐熱温度以下として、外被材に塗布したので、ガスバリア性を有する外被材の過熱不良の低減が図れる信頼性の高い真空断熱材及び真空断熱材を用いた冷蔵庫を提供できる。   As described above, in the fourth embodiment of the present invention, as shown in FIG. 12, a synthetic rubber-based hot melt adhesive is used as the adhesive member, and the hot melt adhesive is cooled after being discharged from the nozzle. Since the temperature of the hot-melt adhesive is applied to the jacket material at a temperature lower than the heat resistance temperature of the jacket material, a highly reliable vacuum heat insulating material and vacuum heat insulating material that can reduce overheating failure of the jacket material having gas barrier properties. A refrigerator using the material can be provided.

上述の本発明の実施形態によれば、外被材の耳部と真空断熱材表面との間の空気層を小さくするように、耳部と真空断熱材表面とを密着したので、従来真空断熱材周辺に形成されていた、真空断熱材より断熱性能の悪い空気分子の滞留する間隙を小さくでき、トータルとしての熱漏洩が減少する真空断熱材及び真空断熱材を用いた冷蔵庫を提供できる。   According to the above-described embodiment of the present invention, the ear portion and the vacuum heat insulating material surface are brought into close contact with each other so as to reduce the air layer between the ear portion of the jacket material and the surface of the vacuum heat insulating material. It is possible to provide a refrigerator using a vacuum heat insulating material and a vacuum heat insulating material, which can be formed in the periphery of the material, and in which a gap in which air molecules having a heat insulating performance worse than that of a vacuum heat insulating material can be reduced can be reduced.

また、剛性のある外被材の耳部が真空断熱材自身に密着するので、真空断熱材自身の強度が向上するので、真空断熱材自身の製造工程や運搬・保管工程等のハンドリングによる変形や経時変化が少ないので、ハンドリング性の良い真空断熱材を提供できる。   In addition, since the ear of the rigid jacket material is in close contact with the vacuum heat insulating material itself, the strength of the vacuum heat insulating material itself is improved, so that deformation due to handling such as the manufacturing process, transportation / storage process of the vacuum heat insulating material itself, etc. Since there is little change with time, it is possible to provide a vacuum heat insulating material with good handling properties.

また、真空断熱材自身の強度が向上し、かつ、ウレタン等の発泡断熱材との接着強度が強い真空断熱材を提供できるので、真空断熱材をウレタン等の発泡断熱材中に設置した箱体強度の強い断熱壁を有する冷蔵庫を提供できる。   Moreover, since the vacuum heat insulating material itself has improved strength and can provide a vacuum heat insulating material having strong adhesive strength with a foam heat insulating material such as urethane, a box body in which the vacuum heat insulating material is installed in a foam heat insulating material such as urethane. A refrigerator having a strong heat insulating wall can be provided.

１１…外板、１２…内板、１３…発泡断熱材、３０・４０…真空断熱材、３１・４１…芯材、３２・４２…外被材、３３・４３…耳部、３４・４４…熱溶着部。 DESCRIPTION OF SYMBOLS 11 ... Outer plate, 12 ... Inner plate, 13 ... Foam heat insulating material, 30/40 ... Vacuum heat insulating material, 31/41 ... Core material, 32/42 ... Cover material, 33/43 ... Ear part, 34/44 ... Heat welding part.

Claims (5)

芯材と該芯材を被覆する外被材とを備え、前記外被材の内部を減圧密封する真空断熱材において、
前記外被材は熱溶着可能な合成樹脂層と、該合成樹脂層の外層のガスバリヤ性を有する金属層と、前記芯材表面よりはみ出す耳部とを有し、
前記外被材の周縁に前記耳部の一部として形成され且つ該耳部の幅よりも小さい幅の熱溶着部と、
前記耳部の端部から前記真空断熱材の側部にわたって塗られた接着部材と、を備え、
前記耳部のうち前記真空断熱材表面との間に前記接着部材を介在させて前記真空断熱材表面側に重合し密着するように折り曲げられた部分は該真空断熱材表面側の変形が防止されるように全面的に接着されて、前記耳部と前記真空断熱材側壁表面との間には空気層を有することを特徴とする真空断熱材。 In a vacuum heat insulating material comprising a core material and a jacket material covering the core material, and sealing the inside of the jacket material under reduced pressure,
The jacket material has a heat-synthesizable synthetic resin layer, a metal layer having gas barrier properties of the outer layer of the synthetic resin layer, and an ear portion protruding from the core material surface,
A heat-welded part formed as a part of the ear part on the periphery of the jacket material and having a width smaller than the width of the ear part;
An adhesive member applied from the end of the ear to the side of the vacuum heat insulating material ,
The bent portion so that the adhesive member is interposed polymerization in the vacuum heat insulating material surface to contact the deformation of the vacuum heat insulating material surface is prevented between the vacuum heat insulator surface of the front Kimimi portion The vacuum heat insulating material is bonded to the entire surface and has an air layer between the ear portion and the side surface of the vacuum heat insulating material side wall . 外板と内板とを備え、前記外板と前記内板とによって形成される空間に真空断熱材を配設し、前記真空断熱材以外の前記空間に発泡断熱材を充填した冷蔵庫において、
前記真空断熱材は、芯材と該芯材を被覆する外被材とを備え、
前記外被材は熱溶着可能な合成樹脂層と、該合成樹脂層の外層のガスバリヤ性を有する金属層と、前記芯材表面よりはみ出す耳部とを有し、
前記外被材の周縁に前記耳部の一部として形成され且つ該耳部の幅よりも小さい幅の熱溶着部と、
前記耳部の端部から前記真空断熱材の側部にわたって塗られた接着部材と、を備え、
前記耳部のうち前記真空断熱材表面との間に前記接着部材を介在させて前記真空断熱材表面側に重合し密着するように折り曲げられた部分は該真空断熱材表面側の変形が防止されるように全面的に接着されて、前記耳部と前記真空断熱材側壁表面との間には空気層を有する真空断熱材を設けたことを特徴とする冷蔵庫。 In a refrigerator comprising an outer plate and an inner plate, a vacuum heat insulating material is disposed in a space formed by the outer plate and the inner plate, and the space other than the vacuum heat insulating material is filled with a foam heat insulating material,
The vacuum heat insulating material includes a core material and a jacket material covering the core material,
The jacket material has a heat-synthesizable synthetic resin layer, a metal layer having gas barrier properties of the outer layer of the synthetic resin layer, and an ear portion protruding from the core material surface,
A heat-welded part formed as a part of the ear part on the periphery of the jacket material and having a width smaller than the width of the ear part;
An adhesive member applied from the end of the ear to the side of the vacuum heat insulating material ,
The bent portion so that the adhesive member is interposed polymerization in the vacuum heat insulating material surface to contact the deformation of the vacuum heat insulating material surface is prevented between the vacuum heat insulator surface of the front Kimimi portion The refrigerator is characterized in that a vacuum heat insulating material having an air layer is provided between the ear portion and the vacuum heat insulating material side wall surface . 芯材と該芯材を被覆する外被材とを備え、前記外被材の内部を減圧密封し、前記外被材は熱溶着可能な合成樹脂層と、該合成樹脂層の外層のガスバリヤ性を有する金属層と、前記芯材表面よりはみ出す耳部とを有し、
前記外被材の周縁に前記耳部の一部として形成され且つ該耳部の幅よりも小さい幅を熱溶着し、前記耳部の端部から前記真空断熱材の側部にわたる前記耳部、或いは、前記耳部が密着する前記真空断熱材表面、或いは、前記耳部と該耳部が密着する前記真空断熱材表面、に接着部材を塗布する接着工程を有し、該塗布工程により塗布した前記接着部材の接着力により、前記耳部のうち前記真空断熱材表面との間に前記接着部材を介在させて前記真空断熱材の角部を覆い該真空断熱材表面側に重合し密着するように折り曲げた部分は前記真空断熱材表面側の変形が防止されるように全面的に接着して前記耳部と前記真空断熱材側壁表面との間には空気層を備えたことを特徴とする真空断熱材の製造方法。 A core material and a jacket material covering the core material, the inside of the jacket material being sealed under reduced pressure, the jacket material being a heat-welded synthetic resin layer, and a gas barrier property of the outer layer of the synthetic resin layer And a metal layer having ears protruding from the surface of the core material,
The width smaller width than the outer formed as part of the ear portion to the peripheral edge of the covering material and the ear portion is heat-welded, the ears that cotton on the side of the vacuum heat insulating material from the end of the ear portion Or an adhesion step of applying an adhesive member to the vacuum heat insulating material surface where the ear portion is in close contact, or the vacuum heat insulating material surface where the ear portion and the ear portion are in close contact with each other. the adhesion of the coated the adhesive member, the adhesive member is interposed by polymerization into the vacuum heat insulating material surface side covers the corner portions of the vacuum heat insulating material contact between the vacuum heat insulating material surface of the ear portion The bent portion is adhered to the entire surface so as to prevent deformation of the vacuum heat insulating material surface side, and an air layer is provided between the ear portion and the vacuum heat insulating material side wall surface. A method for manufacturing a vacuum heat insulating material. 前記接着部材として、合成ゴム系のホットメルト接着剤を使用したことを特徴とする請求項１から３のいずれかに記載の真空断熱材及び真空断熱材を用いた冷蔵庫。   The refrigerator using the vacuum heat insulating material and the vacuum heat insulating material according to any one of claims 1 to 3, wherein a synthetic rubber-based hot melt adhesive is used as the adhesive member. 前記接着部材として、合成ゴム系のホットメルト接着剤を使用し、該ホットメルト接着剤を、ノズルから吐出した後に冷却することにより、前記ホットメルト接着剤の温度を、外被材の耐熱温度以下として、該外被材に塗布したことを特徴とする請求項４に記載の真空断熱材及び真空断熱材を用いた冷蔵庫。   As the adhesive member, a synthetic rubber-based hot melt adhesive is used, and the hot melt adhesive is cooled after being discharged from a nozzle so that the temperature of the hot melt adhesive is lower than the heat resistant temperature of the jacket material. The refrigerator using the vacuum heat insulating material and the vacuum heat insulating material according to claim 4, wherein the vacuum heat insulating material is applied to the jacket material.
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