JP2008008400A - Vacuum heat insulating material - Google Patents

Vacuum heat insulating material Download PDF

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JP2008008400A
JP2008008400A JP2006179240A JP2006179240A JP2008008400A JP 2008008400 A JP2008008400 A JP 2008008400A JP 2006179240 A JP2006179240 A JP 2006179240A JP 2006179240 A JP2006179240 A JP 2006179240A JP 2008008400 A JP2008008400 A JP 2008008400A
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layer
heat insulating
film
insulating material
plasma
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Atsushi Tsujii
篤 辻井
Ikuno Shino
郁乃 示野
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Toppan Inc
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Toppan Printing Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum heat insulating material which hardly causes a heat bridge phenomenon due to the heat transfer from a cladding, and can keep excellent heat insulating performance for a long time because of the excellent gas barrier functionality of the cladding, and further is excellent in the economical profitability because of its low cost. <P>SOLUTION: The vacuum heat insulating material is configured by enclosing a heat insulating core material 12 in both claddings 11 and by evacuating the inside of the claddings 11. Both the claddings are composed of laminated layer composition. In the laminated layer composition, one layer of transparent barrier film layers composed of a base material plastic film layer/a ceramic vapor deposited layer is included as a barrier layer. The transparent barrier film layer is processed by the plasma preprocessing by special plasma using a follower node plasma processor before vapor depositing the vapor deposited layer. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、冷蔵庫、自動販売機、ジャーポットなどの保冷・保温機器に取り付けて、断熱効果を発揮する真空断熱材に関するものである。   The present invention relates to a vacuum heat insulating material that exerts a heat insulating effect by being attached to a cold and heat insulating device such as a refrigerator, a vending machine, and a jar pot.

従来、冷蔵庫、自動販売機、ジャーポットなどの保冷・保温機器には、種々の断熱材が使用されており、特に、断熱性能の優れた断熱材としては、断熱性コア材を外装体内に封入し、内部を真空排気した構成の真空断熱材が使用されていた。この外装体は、外部からのガス（空気）の侵入を防ぎ、内部を長期真空状態に保持するために、ガスバリア性に優れたものである必要があった。そこで、従来は、高いバリア性を付与するために、バリア層として、６〜２０μｍ程度の厚みのアルミニウム箔層を構成層中にもつ外装材が用いられていた。   Conventionally, various heat insulating materials have been used for refrigerators, vending machines, jar pots, and other cold insulation devices. Especially, as a heat insulating material with excellent heat insulating performance, a heat insulating core material is enclosed in the exterior body. However, a vacuum heat insulating material having a configuration in which the inside is evacuated is used. This exterior body needs to have an excellent gas barrier property in order to prevent the ingress of gas (air) from the outside and to keep the inside in a vacuum state for a long time. Therefore, conventionally, an exterior material having an aluminum foil layer with a thickness of about 6 to 20 μm in the constituent layer has been used as a barrier layer in order to impart high barrier properties.

しかし、アルミニウム箔層を構成層中にもつ外装材は、ガスバリア性には優れているが、アルミニウム自体の熱伝導率が高いため、アルミニウム箔層を介して熱が伝わり、断熱効果が低下する、所謂、ヒートブリッジ現象の問題があった。このヒートブリッジ現象を解決するために、バリア層として、アルミニウム箔層の代わりに、比較的に熱伝導率が小さいステンレス箔層を用いる方法（例えば、特許文献１参照）、ガラス蒸着膜層を用いる方法（例えば、特許文献２参照）、セラミック蒸着層を用いる方法（例えば、特許文献３参照）などが知られていた。また、構成中に、セラミック蒸着層をバリア層とする、基材プラスチックフィルムにホロアノードプラズマ処理器を用いた特殊プラズマによるプラズマ前処理が施してセラミック蒸着した透明バリアフィルムを二層設けて、ヒートブリッジの問題の解決とバリア性の確保を行っていた。
特開平８−１５９３７６号公報 特開平７−１１３４９３号公報 特開平８−１５２２５８号公報 However, the exterior material having an aluminum foil layer in the constituent layers is excellent in gas barrier properties, but because of the high thermal conductivity of aluminum itself, heat is transmitted through the aluminum foil layer, and the heat insulating effect is reduced. There was a problem of so-called heat bridge phenomenon. In order to solve this heat bridge phenomenon, a method of using a stainless steel foil layer having a relatively low thermal conductivity instead of an aluminum foil layer as a barrier layer (for example, see Patent Document 1), a glass vapor deposition film layer is used. Methods (for example, see Patent Document 2), methods using a ceramic vapor deposition layer (for example, see Patent Document 3), and the like have been known. In addition, during the construction, two layers of transparent barrier film with ceramic vapor deposition by applying a plasma pretreatment with special plasma using a holo anode plasma treatment device to a base plastic film with a ceramic vapor deposition layer as a barrier layer are provided. The problem of the bridge was solved and the barrier property was secured.
JP-A-8-159376 JP-A-7-113493 JP-A-8-152258

しかしながら、バリア層としてステンレス箔層を用いた方法では、なお、ステンレスの熱伝導率が高いため、ヒートブリッジ現象の低減が不十分であった。また、バリア層としてガラス蒸着膜層を用いた方法やセラミック蒸着フィルム層を用いる方法は、ヒートブリッジ現象の低減は十分であったが、ガスバリア性が不十分であり、長期間にわたって真空状態を保つことが不可能であった。また、セラミック蒸着層をバリア層とする透明バリアフィルムを構成中に二層設けたものは、コストが高くなったため、ユーザー側からコストの低減及び構成の合理化が要望されていた。   However, in the method using the stainless steel foil layer as the barrier layer, the thermal conductivity of stainless steel is still high, so that the reduction of the heat bridge phenomenon is insufficient. Moreover, although the method using a glass vapor deposition film layer or the method using a ceramic vapor deposition film layer as the barrier layer was sufficient to reduce the heat bridge phenomenon, the gas barrier property is insufficient, and the vacuum state is maintained for a long period of time. It was impossible. In addition, since two layers of a transparent barrier film having a ceramic vapor-deposited layer as a barrier layer are included in the cost, the cost has been increased, and the user has been requested to reduce the cost and rationalize the configuration.

本発明は、上述の従来の真空断熱材における問題点を解決したものであり、ヒートブリッジ現象が少なく、長期にわたって断熱性能が良好で、しかも、低コストで経済性に優れる真空断熱材を提供するものである。   The present invention solves the problems in the conventional vacuum heat insulating materials described above, and provides a vacuum heat insulating material that has less heat bridge phenomenon, good heat insulating performance over a long period of time, and that is low in cost and excellent in economic efficiency. Is.

すなわち、本発明の発明は、断熱性コア材を表裏の外装体内に封入し、内部を真空排気した真空断熱材において、表裏の外装体が積層構成からなり、この積層構成中に、基材プ
ラスチックフィルム層／セラミック蒸着層構成の透明バリアフィルム層を、バリア層として一層有し、透明バリアフィルム層が、蒸着層を蒸着する前に、ホロアノードプラズマ処理器を用いた特殊プラズマによるプラズマ前処理が施されていることを特徴とする真空断熱材である。 That is, the invention of the present invention is a vacuum heat insulating material in which a heat insulating core material is enclosed in front and back exterior bodies, and the inside is evacuated, and the front and back exterior bodies have a laminated structure. A transparent barrier film layer having a film layer / ceramic vapor deposition layer configuration is provided as a barrier layer, and before the vapor deposition layer is deposited, the transparent barrier film layer is subjected to plasma pretreatment with a special plasma using a holo anode plasma treatment device. It is the vacuum heat insulating material characterized by being given.

本発明の真空断熱材は、表裏の外装体の積層構成中に、基材プラスチックフィルム層／セラミック蒸着層構成の透明蒸着フィルム層をバリア層として一層有するものであり、この透明蒸着フィルム層は、アルミニウム箔層と比較して熱の伝導が悪い。このため、本発明の真空断熱材は、アルミニウム箔層をバリア層として有する積層フィルムを、表裏の外装体に用いた従来の真空断熱材と比較して、外装体を通しての熱移動が少なく、従って、断熱効果が低下するヒートブリッジ現象が少ない。   The vacuum heat insulating material of the present invention has a transparent vapor-deposited film layer of a base plastic film layer / ceramic vapor-deposited layer structure as a barrier layer in the laminated structure of the front and back exterior bodies. Heat conduction is poor compared to the aluminum foil layer. For this reason, the vacuum heat insulating material of the present invention has less heat transfer through the exterior body compared to the conventional vacuum heat insulating material used for the front and back exterior bodies, the laminated film having the aluminum foil layer as a barrier layer. There is little heat bridge phenomenon that the heat insulation effect decreases.

また、本発明の真空断熱材の外装体のバリア層として用いる透明蒸着フィルムは、真空引きや折り曲げなどによるバリア性劣化を防止するために、基材プラスチックフィルムにアンカーコートを施した後に、セラミック蒸着加工を行ったものであり、外装体のガスバリア性が高く、長期にわたって内部の真空状態が保たれ、断熱性能が良好に長期にわたって維持される。   In addition, the transparent vapor deposition film used as the barrier layer of the vacuum insulator outer packaging of the present invention is ceramic vapor deposition after anchor coating is applied to the base plastic film in order to prevent barrier property deterioration due to vacuum drawing or bending. It has been processed, and the gas barrier property of the exterior body is high, the internal vacuum state is maintained for a long time, and the heat insulating performance is favorably maintained for a long time.

また、本発明の真空断熱材の外装体は、バリア層として透明蒸着フィルム層を一層だけ設けるものであるので、低コストで経済性に優れる。   Moreover, since the exterior body of the vacuum heat insulating material of the present invention is provided with only one transparent vapor-deposited film layer as a barrier layer, it is low in cost and excellent in economy.

本発明の真空断熱材（１０）は、図１（ａ）に示すように、表裏の外装体（１１）内に断熱性コア材（１２）を真空排気して封入するものである。表裏の外装体は、積層構成であり、この積層構成中に、図３に示す基材プラスチックフィルム層（１４１）／アンカーコート層（１４２）／セラミック蒸着層（１４３）構成の透明蒸着フィルム層（１４０）を、バリア層として一層設けるものである。透明蒸着フィルムとしては、基材プラスチックフィルムにホロアノードプラズマ処理器を用いた特殊プラズマによるプラズマ前処理が施してセラミック蒸着した透明バリアフィルムを用い、外装体の構成例としては、〔外側〕基材プラスチックフィルムにホロアノードプラズマ処理器を用いた特殊プラズマによるプラズマ前処理が施してセラミック蒸着した透明バリアフィルム層／ナイロンフィルム層／高密度ポリエチレンフィルム〔コア材側〕構成、ナイロンフィルム層／基材プラスチックフィルムにホロアノードプラズマ処理器を用いた特殊プラズマによるプラズマ前処理が施してセラミック蒸着した透明バリアフィルム層／高密度ポリエチレンフィルム〔コア材側〕構成、ナイロンフィルム層／基材プラスチックフィルムにホロアノードプラズマ処理器を用いた特殊プラズマによるプラズマ前処理が施してセラミック蒸着した透明バリアフィルム層／ナイロンフィルム層／高密度ポリエチレンフィルム〔コア材側〕構成などがある。なお、積層フィルムのコア材側に用いられる高密度ポリエチレン層は、シーラント層であり、真空断熱材の端面からのバリア低下を防止して真空度維持のために、密度０．９４１〜０．９６５の高密度ポリエチレンが用いられる。また、ナイロンフィルム層は、耐ピンホール性を付与するために用いるものである。また、断熱性コア材としては、粉末シリカ成形体、珪酸カルシウム成形体、ポリウレタンフォームなどが使用される。   As shown in FIG. 1 (a), the vacuum heat insulating material (10) of the present invention is one in which the heat insulating core material (12) is evacuated and sealed in the front and back exterior bodies (11). The front and back exterior bodies have a laminated structure. During this laminated structure, a transparent vapor-deposited film layer (base plastic film layer (141) / anchor coat layer (142) / ceramic vapor-deposited layer (143) structure shown in FIG. 140) as a barrier layer. As the transparent vapor-deposited film, a transparent barrier film obtained by subjecting a base plastic film to plasma pretreatment with a special plasma using a holo anode plasma processing device and ceramic vapor deposition is used. Transparent barrier film layer / nylon film layer / high-density polyethylene film (core material side) structure, plastic film pre-treated with special plasma using a holo-anode plasma processor, and ceramic vapor deposition, nylon film layer / substrate plastic Transparent barrier film layer / high-density polyethylene film (core material side) structure with ceramic pre-deposited plasma with special plasma using a holo anode plasma processor on the film, nylon film layer / substrate plastic film with holo Plasma pretreatment by special plasma using a plasma processor is like ceramic vapor deposited transparent barrier film layer / a nylon film layer / high-density polyethylene film [core material side] Configuration subjected. Note that the high-density polyethylene layer used on the core material side of the laminated film is a sealant layer, and has a density of 0.941 to 0.965 in order to prevent a barrier drop from the end face of the vacuum heat insulating material and maintain the degree of vacuum. High density polyethylene is used. The nylon film layer is used for imparting pinhole resistance. In addition, as the heat insulating core material, a powder silica molded body, a calcium silicate molded body, a polyurethane foam, or the like is used.

また、基材プラスチックフィルムにホロアノードプラズマ処理器を用いた特殊プラズマによるプラズマ前処理が施してセラミック蒸着した透明バリアフィルムは、アルミニューム箔並みのバリア性を有している。基材プラスチックフィルムとしては、ポリエチレンテレフタレートフィルムなどが使用され、プラズマ処理は、アルゴン、窒素、酸素及び水素からなる群から選択される少なくとも１種を使用し、ホロアノードプラズマ処理を用いた特殊プラズマによるプラズマ処理を行うものである。蒸着に使用する無機酸化物としては
、珪素、アルミニュームなどの酸化物が使用され、蒸着方法としては、真空蒸着などの物理蒸着法やシロキサン化合物などの原料ガスを用いた化学蒸着法が用いられる。また、アンカーコート剤としては、有機官能基を有するシランカップリング剤、あるいはその加水分解物と、ポリオールおよびイソシアネート化合物などの複合物である。塗工方法は、グラビア印刷などの印刷方式やロールコートなどの塗布方式により行われる。 In addition, a transparent barrier film obtained by subjecting a base plastic film to plasma pre-treatment with special plasma using a holo anode plasma processing apparatus and depositing ceramics has a barrier property similar to that of aluminum foil. As the base plastic film, a polyethylene terephthalate film or the like is used, and the plasma treatment uses at least one selected from the group consisting of argon, nitrogen, oxygen and hydrogen, and a special plasma using a holo anode plasma treatment. Plasma treatment is performed. As an inorganic oxide used for vapor deposition, oxides such as silicon and aluminum are used. As a vapor deposition method, a physical vapor deposition method such as vacuum vapor deposition or a chemical vapor deposition method using a source gas such as a siloxane compound is used. . The anchor coat agent is a silane coupling agent having an organic functional group, or a hydrolyzate thereof, and a composite such as a polyol and an isocyanate compound. The coating method is performed by a printing method such as gravure printing or a coating method such as roll coating.

＜実施例１＞
まず、１２μｍ厚のバリアフィルムである基材プラスチックフィルムにホロアノードプラズマ処理器を用いた特殊プラズマによるプラズマ前処理が施して、酸化アルミニュームを約２００ｎｍ厚さ蒸着した透明バリアフィルムに、ウレタン系接着剤を３ｇ／ｍ2 塗布して２５μｍ厚のナイロンフィルムを貼り合わせ、この２層の積層フィルムのナイロンフィルム面に、ウレタン系接着剤を３ｇ／ｍ2 塗布して５０μｍ厚の高密度ポリエチレンフィルムを貼り合わせて、図１（ｂ）に示す〔外側〕基材プラスチックフィルムにホロアノードプラズマ処理器を用いた特殊プラズマによるプラズマ前処理が施して、酸化アルミニュームを約２００ｎｍ厚さ蒸着した透明バリアフィルム層（１１１）／接着剤層（１１４）／ナイロンフィルム層（１１２）／接着剤層（１１５）／高密度ポリエチレンフィルム層（１１３）〔コア材側〕構成の積層フィルムＡ（１１０）を作製し、次に、この積層フィルムＡを用いて外装体用の三方シール袋を作製し、この外装体用の三方シール袋に、断熱コア材として粉末シリカの成形体を真空密封して図１（ａ）に示す実施例１の真空断熱材（１０）を作製した。 <Example 1>
First, a 12 μm-thick base plastic film is subjected to plasma pretreatment with special plasma using a holo anode plasma treatment device, and a urethane-based adhesive is applied to a transparent barrier film deposited with an aluminum oxide thickness of about 200 nm. agent bonding the nylon film of 25μm thickness was 3 g / m 2 coating, a nylon film surface of the laminated film of the two-layer, high-density polyethylene film 50μm thick urethane adhesive to 3 g / m 2 coating A transparent barrier film in which aluminum oxide is deposited to a thickness of about 200 nm by applying a plasma pretreatment with a special plasma using a holo anode plasma processing device to the [outside] base plastic film shown in FIG. Layer (111) / adhesive layer (114) / nylon film layer (112) / Adhesive layer (115) / High-density polyethylene film layer (113) [Core material side] Laminated film A (110) is produced, and then this laminated film A is used to form a three-side sealed bag for an exterior body. The molded body of powdered silica as a heat insulating core material was vacuum-sealed in this three-sided seal bag for an exterior body to produce a vacuum heat insulating material (10) of Example 1 shown in FIG. 1 (a).

＜比較例１＞
まず、１２μｍ厚のバリアフィルムである基材プラスチックフィルムに酸化アルミニュームを約２００ｎｍ厚さ蒸着した透明バリアフィルムに、ウレタン系接着材を３ｇ／ｍ2 塗布して２５μｍ厚のナイロンフィルムを貼り合わせ、この２層の積層フィルムのナイロンフィルム面に、ウレタン系接着材を３ｇ／ｍ2 塗布して１２μｍ厚の基材プラスチックフィルムに酸化アルミニュームを約２００ｎｍ厚さ蒸着した透明バリアフィルムを貼り合わせ、この３層の積層フィルムの基材プラスチックフィルムに酸化アルミニュームを約２００ｎｍ厚さ蒸着した透明バリアフィルム面に、ウレタン系接着材を３ｇ／ｍ2 塗布して５０μｍ厚の高密度ポリエチレンを貼り合わせて、図２（ａ）に示す〔外側〕基材プラスチックフィルムに酸化アルミニュームを約２００ｎｍ厚さ蒸着した透明バリアフィルム層（１２１）／接着剤層（１２５）／ナイロンフィルム層（１２２）／接着剤層（１２６）／基材プラスチックフィルムに酸化アルミニュームを約２００ｎｍ厚さ蒸着した透明バリアフィルム層（１２３）／接着剤層（１２７）／高密度ポリエチレンフィルム層（１２４）〔コア材側〕構成の積層フィルムＢ（１２０）を作製し、次に、実施例１と同様に、この積層フィルムＢを用いて外装体用の三方シール袋を作製し、この外装体用の三方シール袋に、断熱コア材として粉末シリカの成形体を真空密封して比較例１の真空断熱材を作製した。 <Comparative Example 1>
First, 3 g / m 2 of urethane adhesive was applied to a transparent barrier film obtained by depositing aluminum oxide with a thickness of about 200 nm on a base plastic film, which is a 12 μm thick barrier film, and a 25 μm thick nylon film was bonded. A transparent barrier film obtained by applying 3 g / m 2 of urethane adhesive on a nylon film surface of this two-layer laminated film and depositing aluminum oxide on a 12 μm-thick base plastic film to a thickness of about 200 nm is bonded together. 3g / m 2 of urethane adhesive was applied to the transparent barrier film surface of aluminum oxide deposited on the base plastic film of the three-layered film to a thickness of about 200nm. Aluminum oxide is applied to the [outside] base plastic film shown in Fig. 2 (a). 200 nm thick transparent barrier film layer (121) / adhesive layer (125) / nylon film layer (122) / adhesive layer (126) / aluminum oxide vapor deposited on base plastic film to about 200 nm thickness A laminated film B (120) having a transparent barrier film layer (123) / adhesive layer (127) / high-density polyethylene film layer (124) [core material side] structure was prepared. The laminated film B was used to produce a three-side sealed bag for an exterior body, and the molded body of powdered silica was vacuum-sealed as a heat-insulating core material in the three-side sealed bag for the exterior body. Was made.

＜比較例２＞
まず、１２μｍ厚のポリエチレンテレフタレートフィルムに、ウレタン系接着剤を３ｇ／ｍ2 塗布して１５μｍ厚のナイロンフィルムを貼り合わせ、この２層の積層フィルムのナイロンフィルム面に、ウレタン系接着剤を３ｇ／ｍ2 塗布して６μｍ厚のアルミニウム箔を貼り合わせて、この３層の積層フィルムのアルミニウム箔を面に、ウレタン系接着材を３ｇ／ｍ2 塗布して５０μｍ厚の高密度ポリエチレンを貼り合わせて、図２（ｂ）に示す〔外側〕ポリエチレンテレフタレートフィルム層（１３１）／接着剤層（１３５）／ナイロンフィルム層（１３２）／接着剤層（１３６）／アルミニウム箔層（１３３）／接着剤層（１３７）／高密度ポリエチレンフィルム層（１３４）〔コア材側〕構成の積層フィルムＣ（１３０）を作製し（図中、１３４は接着材層）、次に、実施例１と同様に、この
積層フィルムＣを用いて外装体用の三方シール袋を作製し、この外装体用の三方シール袋に、断熱コア材として粉末シリカの成形体を真空密封して比較例２の真空断熱材を作製した。 <Comparative example 2>
First, 3 g / m 2 of urethane adhesive is applied to a 12 μm thick polyethylene terephthalate film and a 15 μm thick nylon film is bonded to the nylon film surface of this two-layer laminated film. Apply m 2 and paste 6 μm thick aluminum foil, and apply 3 g / m 2 of urethane adhesive on the aluminum foil of this three-layer laminated film and paste 50 μm thick high density polyethylene. 2 (b) [Outside] polyethylene terephthalate film layer (131) / adhesive layer (135) / nylon film layer (132) / adhesive layer (136) / aluminum foil layer (133) / adhesive layer (137) / High-density polyethylene film layer (134) [core material side] laminated film C (130) having a configuration (in the figure, 34 is an adhesive layer), and then, in the same manner as in Example 1, a three-sided sealing bag for an exterior body is produced using this laminated film C, and powder as a heat insulating core material is formed on the three-sided sealing bag for the exterior body. The silica compact was vacuum sealed to produce a vacuum heat insulating material of Comparative Example 2.

＜比較評価＞
次に、実施例１、比較例１及び比較例２の３種類の真空断熱材について、その特性及びコストの比較評価をした。その評価結果を表１及び表２に示す。表１は、真空断熱材のガスバリア性及び熱伝導性の評価結果であり、表２は、外装体の積層フィルムの防湿性及びコストの評価結果である。 <Comparison evaluation>
Next, the three types of vacuum heat insulating materials of Example 1, Comparative Example 1 and Comparative Example 2 were subjected to comparative evaluation of characteristics and costs. The evaluation results are shown in Tables 1 and 2. Table 1 shows the evaluation results of the gas barrier property and thermal conductivity of the vacuum heat insulating material, and Table 2 shows the evaluation results of the moisture resistance and cost of the laminated film of the exterior body.

Figure 2008008400
Figure 2008008400

Figure 2008008400
表１の各種真空断熱材の特性評価結果に示されているように、外装体のバリア層に基材プラスチックフィルムにホロアノードプラズマ処理器を用いた特殊プラズマによるプラズマ前処理が施して、酸化アルミニュームを約２００ｎｍ厚さ蒸着した透明バリアフィルム層を一層設けた実施例１の真空断熱材と、外装体のバリア層に基材プラスチックフィルムに酸化アルミニュームを約２００ｎｍ厚さ蒸着した透明バリアフィルム層を二層設けた比較例１の真空断熱材は、バリア性が良好で、熱伝導性が小さかった。外装体のバリア層にアルミニューム箔層を一層設けた比較例２の真空断熱材は、バリア性が極めて良好であったが、熱伝導性が大きかった。従って、実施例１の真空断熱材及び比較例１の真空断熱材は、外装体を通して熱移動により断熱効果が低下するヒートブリッジ現象が少ない。
Figure 2008008400
 As shown in the characteristics evaluation results of various vacuum heat insulating materials in Table 1, the barrier layer of the outer package is subjected to plasma pretreatment with special plasma using a holo anode plasma treatment device on the base plastic film, and aluminum oxide A vacuum barrier material of Example 1 in which a transparent barrier film layer having a thickness of about 200 nm deposited thereon was provided, and a transparent barrier film layer having a thickness of about 200 nm deposited on a base plastic film on the barrier layer of the outer package. The vacuum heat insulating material of Comparative Example 1 provided with two layers had good barrier properties and low thermal conductivity. The vacuum heat insulating material of Comparative Example 2 in which an aluminum foil layer was provided on the barrier layer of the exterior body had a very good barrier property but a large thermal conductivity. Therefore, the vacuum heat insulating material of Example 1 and the vacuum heat insulating material of Comparative Example 1 have few heat bridge phenomena in which the heat insulating effect is reduced by heat transfer through the exterior body.

また、表２の積層フィルムの特性評価結果に示されているように、実施例１の真空断熱材の外装体である積層フィルムＡと、比較例１の真空断熱材の外装体である積層フィルムＢは、比較例２の真空断熱材の外装体である積層フィルムＣと比較して防湿性が極めて良好であった。しかし、生産費用において、積層フィルムＡはコストが低く、積層フィルムＢはコストが高かった。   Moreover, as shown in the characteristic evaluation result of the laminated film of Table 2, laminated film A which is the exterior body of the vacuum heat insulating material of Example 1, and the laminated film which is the exterior body of the vacuum heat insulating material of Comparative Example 1 B had extremely good moisture resistance as compared with the laminated film C which is an exterior body of the vacuum heat insulating material of Comparative Example 2. However, in the production cost, the cost of the laminated film A was low, and the cost of the laminated film B was high.

上記の評価結果から、実施例１の真空断熱材は、外装体からの熱の移動により断熱効果が低下する、所謂、ヒートブリッジ現象が少なく、また、外装体内部の真空状態が長期にわたって保たれて断熱性能が維持され、しかも低コストで生産できる。   From the above evaluation results, the vacuum heat insulating material of Example 1 has less so-called heat bridge phenomenon in which the heat insulating effect is lowered due to the movement of heat from the exterior body, and the vacuum state inside the exterior body is maintained for a long time. Insulation performance is maintained, and it can be produced at low cost.

（ａ）は、実施例１の真空断熱材の構造を示す断面図であり、（ｂ）は、その外装体に用いられる積層フィルムＡの構成を示す断面図である。(A) is sectional drawing which shows the structure of the vacuum heat insulating material of Example 1, (b) is sectional drawing which shows the structure of the laminated | multilayer film A used for the exterior body. （ａ）は、比較例１の真空断熱材の外装体に用いられる積層フィルムＢの構成を示す断面図であり、（ｂ）は、比較例２の真空断熱材の外装体に用いられる積層フィルムＣの構成を示す断面図である。(A) is sectional drawing which shows the structure of the laminated film B used for the exterior body of the vacuum heat insulating material of the comparative example 1, (b) is the laminated film used for the exterior body of the vacuum heat insulating material of the comparative example 2. It is sectional drawing which shows the structure of C. ＧＸフィルム改の一例の構成を示す断面図である。It is sectional drawing which shows the structure of an example of GX film break.

符号の説明Explanation of symbols

１０……真空断熱材
１１……外装体
１２……断熱コア材
１１０……積層フィルムＡ
１１１，１２１，１２３……透明バリアフィルム層
１１２，１２２，１３２……ナイロンフィルム層
１１３，１２４，１３４……高密度ポリエチレンフィルム層
１１４，１１５，１２５，１２６，１２７，１３５，１３６，１３７……接着剤層
１２０……積層フィルムＢ
１３０……積層フィルムＣ
１３１……ポリエチレンテレフタレートフィルム層
１３３……アルミニューム箔層
１４０……透明蒸着フィルム層
１４１……基材プラスチックフィルム層
１４２……アンカーコート層
１４３……セラミック蒸着層 10 ... Vacuum heat insulating material 11 ... Exterior body 12 ... Heat insulating core material 110 ... Laminated film A
111, 121, 123 ... Transparent barrier film layer 112, 122, 132 ... Nylon film layer 113, 124, 134 ... High-density polyethylene film layer 114, 115, 125, 126, 127, 135, 136, 137 ... Adhesive layer 120 ... Laminated film B
130 …… Laminated film C
131 …… Polyethylene terephthalate film layer 133 …… Aluminum foil layer 140 …… Transparent vapor deposition film layer 141 …… Base plastic film layer 142 …… Anchor coat layer 143 …… Ceramic vapor deposition layer

Claims (1)

断熱性コア材を表裏の外装体内に封入し、内部を真空排気した真空断熱材において、前記表裏の外装体が積層構成からなり、該積層構成中に、基材プラスチックフィルム層／セラミック蒸着層構成の透明バリアフィルム層を、バリア層として一層有し、前記透明バリアフィルム層が、蒸着層を蒸着する前に、ホロアノードプラズマ処理器を用いた特殊プラズマによるプラズマ前処理が施されていることを特徴とする真空断熱材。   In a vacuum heat insulating material in which a heat insulating core material is enclosed in front and back exterior bodies, and the inside is evacuated, the front and back exterior bodies have a laminated structure, and in the laminated structure, a base plastic film layer / ceramic vapor deposition layer structure The transparent barrier film layer has a single layer as a barrier layer, and the transparent barrier film layer is subjected to plasma pretreatment with a special plasma using a holo anode plasma treatment device before vapor deposition of the vapor deposition layer. Features vacuum insulation.
JP2006179240A 2006-06-29 2006-06-29 Vacuum heat insulating material Pending JP2008008400A (en)

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JP2020185672A (en) * 2019-05-10 2020-11-19 大日本印刷株式会社 Barrier film
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WO2015087976A1 (en) * 2013-12-11 2015-06-18 凸版印刷株式会社 Outer covering material for vacuum heat insulation materials, vacuum heat insulation material, and heat insulation container
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JPWO2015087976A1 (en) * 2013-12-11 2017-03-16 凸版印刷株式会社 Vacuum insulation material exterior, vacuum insulation material, and insulation container
CN113474589A (en) * 2018-12-11 2021-10-01 凸版印刷株式会社 Laminate for vacuum insulation material and vacuum insulation material using same
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