JP2015155715A - Sheath material of vacuum heat insulation material and heat insulation container - Google Patents
Sheath material of vacuum heat insulation material and heat insulation container Download PDFInfo
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- JP2015155715A JP2015155715A JP2014030441A JP2014030441A JP2015155715A JP 2015155715 A JP2015155715 A JP 2015155715A JP 2014030441 A JP2014030441 A JP 2014030441A JP 2014030441 A JP2014030441 A JP 2014030441A JP 2015155715 A JP2015155715 A JP 2015155715A
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- vacuum heat
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- 239000000463 material Substances 0.000 title claims abstract description 43
- 239000012774 insulation material Substances 0.000 title claims abstract description 8
- 238000009413 insulation Methods 0.000 title abstract description 5
- -1 polypropylene Polymers 0.000 claims abstract description 18
- 230000004888 barrier function Effects 0.000 claims abstract description 14
- 239000004743 Polypropylene Substances 0.000 claims abstract description 12
- 229920001155 polypropylene Polymers 0.000 claims abstract description 12
- 239000000565 sealant Substances 0.000 claims abstract description 11
- 229920006284 nylon film Polymers 0.000 claims abstract description 8
- 239000011810 insulating material Substances 0.000 claims description 30
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 claims description 7
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 6
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 6
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 6
- 239000010410 layer Substances 0.000 description 29
- 230000000052 comparative effect Effects 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 239000011162 core material Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 239000011888 foil Substances 0.000 description 4
- 238000007740 vapor deposition Methods 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009820 dry lamination Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Landscapes
- Refrigerator Housings (AREA)
- Laminated Bodies (AREA)
- Packages (AREA)
- Wrappers (AREA)
- Thermal Insulation (AREA)
Abstract
Description
本発明は、真空断熱材の外装材およびそれを用いた断熱容器に関する。 The present invention relates to a vacuum heat insulating material and a heat insulating container using the same.
真空断熱材は、芯材を外装材で包み、芯材の周囲を真空状態にし、気体による熱伝導率を限りなくゼロに近づけることにより、断熱性能を高めた断熱材である。 The vacuum heat insulating material is a heat insulating material whose heat insulating performance is enhanced by wrapping the core material with an exterior material, making the periphery of the core material in a vacuum state, and bringing the thermal conductivity of the gas as close to zero as possible.
外装材は内部の真空度を保つため、ガスバリヤ性が要求される。
しかしながら従来の真空断熱材は、ガスバリヤ性フィルムとしてアルミ箔を使用しているため、真空断熱材の外装材を伝わる熱伝導、いわゆるヒートブリッジ現象によって真空断熱材の断熱効果が小さくなる。
そこでヒートブリッジ現象を解決するために、ガスバリヤ性フィルムを金属箔ではなく、蒸着膜を有するガスバリヤ性フィルムに変更した真空断熱材の外装材が報告されている。例えば、特許文献１によれば、実施の形態１としてナイロンフィルム、アルミ蒸着ポリエチレンテレフタレートフィルム２枚、低密度ポリエチレンを順に積層した外装材が挙げられている。
The exterior material is required to have a gas barrier property in order to maintain the degree of vacuum inside.
However, since the conventional vacuum heat insulating material uses aluminum foil as a gas barrier film, the heat insulating effect of the vacuum heat insulating material is reduced by the heat conduction that travels through the vacuum heat insulating material, that is, the so-called heat bridge phenomenon.
Thus, in order to solve the heat bridge phenomenon, a vacuum heat insulating material exterior material in which the gas barrier film is changed to a gas barrier film having a deposited film instead of a metal foil has been reported. For example, according to Patent Document 1, an exterior material in which a nylon film, two aluminum vapor-deposited polyethylene terephthalate films, and a low-density polyethylene are sequentially laminated is described as the first embodiment.
このような従来の外装材では、冷却ボックス等に真空断熱材を適用するにあたり、輸送時の振動などによる衝撃によって表面にピンホールが発生しやすく、真空による断熱機能が損なわれる場合があるという問題があった。 In such a conventional exterior material, when applying a vacuum heat insulating material to a cooling box or the like, there is a problem that pinholes are likely to be generated on the surface due to shock caused by vibration during transportation, and the heat insulating function by vacuum may be impaired. was there.
本発明は、このような従来技術による真空断熱材の問題点を解決しようとするものであり、耐突き刺し性に優れる真空断熱材の外装材を提供することにより上記問題点を解決し、振動などによる衝撃によるピンホールが発生しにくい真空断熱材の外装材およびそれを用いた断熱容器を提供することを目的とする。 The present invention is intended to solve the problems of the vacuum heat insulating material according to the conventional technology, and solves the above problems by providing a vacuum heat insulating material exterior material having excellent puncture resistance, such as vibration. It is an object of the present invention to provide a vacuum heat insulating exterior material and a heat insulating container using the same.
上記の課題を解決するための手段として、請求項１に記載の発明は、外側から順に、少なくとも基材層、バリヤ層、シーラント層からなる真空断熱材の外装材において、最外層に延伸ポリプロピレンフィルムを配することを特徴とする真空断熱材の外装材である。 As a means for solving the above-mentioned problems, the invention according to claim 1 is directed to a stretched polypropylene film as an outermost layer in a vacuum heat insulating material comprising at least a base material layer, a barrier layer, and a sealant layer in order from the outside. It is the exterior material of the vacuum heat insulating material characterized by arranging.
また、請求項２に記載の発明は、基材層が延伸ポリプロピレンフィルムと延伸ナイロンフィルムを用いたことを特徴とする請求項１記載の真空断熱材の外装材である。 The invention according to claim 2 is the vacuum heat insulating exterior material according to claim 1, wherein the base material layer uses a stretched polypropylene film and a stretched nylon film.
また、請求項３に記載の発明は、バリヤ層にアルミ蒸着ポリエチレンテレフタレートフィルムとアルミ蒸着エチレン−ビニルアルコール共重合体フィルムを用いたことを特徴とする請求項１または２に記載の真空断熱材の外装材である。 The invention according to claim 3 is the vacuum heat insulating material according to claim 1 or 2, wherein an aluminum-deposited polyethylene terephthalate film and an aluminum-deposited ethylene-vinyl alcohol copolymer film are used for the barrier layer. It is an exterior material.
また、請求項４に記載の発明は、シーラント層に密度が０．９３５ｇ／ｃｍ３以下の直鎖状低密度ポリエチレンフィルムを用い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の外装材である。 The invention according to claim 4 is characterized in that a linear low density polyethylene film having a density of 0.935 g / cm 3 or less is used for the sealant layer. It is an exterior material for vacuum heat insulating material.
また、請求項５に記載の発明は、請求項１から４のいずれかの外装材による真空断熱材を用いたことを特徴とする断熱容器である。 The invention according to claim 5 is a heat-insulating container using the vacuum heat insulating material according to any one of claims 1 to 4.
本発明の真空断熱材の外装材は、耐突き刺し性に優れた構成にすることにより、ピンホールの発生を抑制することが可能であるため、長期間に渡って使用しても高い真空状態を損なうことなく断熱性能を維持することが可能となる。
またそれを用いることにより、振動などによる衝撃によるピンホールが発生しにくい断熱容器を提供することが可能となる。
Since the exterior material of the vacuum heat insulating material of the present invention can suppress the generation of pinholes by adopting a structure excellent in piercing resistance, a high vacuum state is maintained even when used for a long period of time. It becomes possible to maintain heat insulation performance without damaging.
Further, by using it, it is possible to provide a heat-insulating container that is unlikely to generate pinholes due to vibration or the like.
本発明を実施するための形態について、図１および図２を参照しながら説明を加える。 An embodiment for carrying out the present invention will be described with reference to FIGS. 1 and 2.
図１は本発明に係る真空断熱材の一実施形態の部分断面図である。
真空断熱材（１）は、芯材（３）を外装材（２）で包み込んで構成されており、２枚の外装材（２）はシール部（４）で接着され、内部は芯材のほかは真空である。
FIG. 1 is a partial sectional view of an embodiment of a vacuum heat insulating material according to the present invention.
The vacuum heat insulating material (1) is configured by wrapping the core material (3) with the exterior material (2), the two exterior materials (2) are bonded together by the seal portion (4), and the inside is made of the core material. The other is a vacuum.
図２は本発明による真空断熱材の外装材の一実施形態の部分断面図である。 FIG. 2 is a partial cross-sectional view of an embodiment of the vacuum insulation material according to the present invention.
[基材層]
基材層（２０）は延伸ポリプロピレンフィルム（１０）を用いる。延伸ポリプロピレンフィルム（１０）と延伸ナイロンフィルム（１１）の２層で構成されるとなおよい。延伸ナイロンフィルムを用いると、真空断熱材の外装材の強靭さが向上する。
[Base material layer]
A stretched polypropylene film (10) is used for the base material layer (20). More preferably, it is composed of two layers of a stretched polypropylene film (10) and a stretched nylon film (11). When a stretched nylon film is used, the toughness of the vacuum insulation material is improved.
[バリヤ層]
バリヤ層（２１）はアルミ蒸着ポリエチレンテレフタレートフィルム（１２）とアルミ蒸着エチレン−ビニルアルコール共重合体フィルム（１３）の２層で構成される。金属箔ではなく、蒸着膜を有するガスバリヤ性フィルムを用いることで、ヒートブリッジ現象が解決できる。蒸着面における蒸着物の隙間や欠陥を補完するために、ガスバリヤ性フィルムの蒸着面が対向するように積層することが望ましいとされている。厚みはそれぞれ９〜２５mmが好ましい。
[Barrier layer]
The barrier layer (21) is composed of two layers of an aluminum vapor-deposited polyethylene terephthalate film (12) and an aluminum vapor-deposited ethylene-vinyl alcohol copolymer film (13). The heat bridge phenomenon can be solved by using a gas barrier film having a deposited film instead of a metal foil. In order to complement gaps and defects in the deposit on the vapor deposition surface, it is desirable to laminate the gas barrier film so that the vapor deposition surfaces face each other. Each thickness is preferably 9 to 25 mm.
[シーラント層]
シーラント層（２２）は密度が０．９３５ｇ／ｃｍ３以下の直鎖状低密度ポリエチレンフィルムで構成される。厚みは３０〜８０mmが好ましい。
密度が０．９４ｇ／ｃｍ３と高ければ耐屈曲性が悪くなり、好ましくない。
[Sealant layer]
The sealant layer (22) is composed of a linear low density polyethylene film having a density of 0.935 g / cm 3 or less. The thickness is preferably 30 to 80 mm.
If the density is as high as 0.94 g / cm 3 , the bending resistance is deteriorated, which is not preferable.
本発明の真空断熱材の外装材を構成する各層は接着剤層（１５）を介して貼り合わせられており、接着剤にはたとえば２液硬化型ウレタン系接着剤を用いることができる。
積層方法にはドライ・ラミネーションによる方法あるいは押出ラミネーションによる方法などが採用できる。
なお得られた外装材（２）は基材層（２０）の側が外側（１６）になるようにして用いる。
Each layer which comprises the exterior | packing material of the vacuum heat insulating material of this invention is bonded together through the adhesive bond layer (15), and a 2 liquid-curing urethane type adhesive can be used for an adhesive agent, for example.
As a lamination method, a dry lamination method or an extrusion lamination method can be employed.
The obtained exterior material (2) is used so that the side of the base material layer (20) is the outside (16).
以下本発明の実施例について具体的に説明するが、本発明はこれに限定されるものではない。
なお、本発明の真空断熱材の外装材の耐突き刺し性の評価は次のようにして行った。
Examples of the present invention will be specifically described below, but the present invention is not limited thereto.
In addition, evaluation of the puncture resistance of the exterior material of the vacuum heat insulating material of the present invention was performed as follows.
（突刺し強さ試験）
試験片を固定し、直径１．０ｍｍ、先端形状が半円形の針を毎分５０ｍｍの速度で突き刺し、針が貫通するまでの最大応力を測定した。
試験片の数は５個とし、その平均値を求めた。
突刺しは基材層側からとシーラント層側の両方向から行い、それぞれの最大応力を測定した。
(Puncture strength test)
The specimen was fixed, a needle having a diameter of 1.0 mm and a semicircular tip was pierced at a speed of 50 mm per minute, and the maximum stress until the needle penetrated was measured.
The number of test pieces was five, and the average value was obtained.
The piercing was performed from both directions of the base material layer side and the sealant layer side, and the respective maximum stresses were measured.
（実施例１）
基材層として厚さ２０μｍの延伸ポリプロピレンフィルムと厚さ１５μｍの延伸ナイロンフィルム、バリヤ層として厚さ１２μｍのアルミ蒸着ポリエチレンテレフタレートフィルムと厚さ１５μｍのアルミ蒸着エチレン−ビニルアルコール共重合体フィルムをこの順にウレタン系接着剤を用いて積層、接着した。
次いで、シーラント層である厚さ５０μｍ、密度０．９２３ｇ／ｃｍ３の直鎖状低密度ポリエチレンフィルムと、上記積層体のアルミ蒸着エチレン−ビニルアルコール共重合体フィルム面とを貼り合わせて、基材層、バリヤ層、シーラント層からなる真空断熱材の外装材を得た。
Example 1
A stretched polypropylene film having a thickness of 20 μm and a stretched nylon film having a thickness of 15 μm are used as a base layer, an aluminum-deposited polyethylene terephthalate film having a thickness of 12 μm and an aluminum-deposited ethylene-vinyl alcohol copolymer film having a thickness of 15 μm are formed in this order. Lamination and bonding were performed using a urethane adhesive.
Next, a linear low-density polyethylene film having a thickness of 50 μm and a density of 0.923 g / cm 3 , which is a sealant layer, and the aluminum-deposited ethylene-vinyl alcohol copolymer film surface of the laminate are bonded together, A vacuum heat insulating exterior material comprising a layer, a barrier layer, and a sealant layer was obtained.
（比較例１）
基材層に延伸ポリプロピレンフィルムを用いない他は実施例１と同様にして外装材を製造した。
(Comparative Example 1)
An exterior material was produced in the same manner as in Example 1 except that a stretched polypropylene film was not used for the base material layer.
（比較例２）
比較例１のアルミ蒸着エチレン−ビニルアルコール共重合体フィルムに代えて、厚さ７μｍのアルミニウム箔を用いた他は比較例１と同様にして外装材を製造した。
(Comparative Example 2)
An exterior material was produced in the same manner as in Comparative Example 1 except that an aluminum foil having a thickness of 7 μm was used instead of the aluminum-deposited ethylene-vinyl alcohol copolymer film of Comparative Example 1.
（比較例３）
比較例２の、密度が０．９２３ｇ／ｃｍ３の直鎖状低密度ポリエチレンフィルムに代えて、密度が０．９４ｇ／ｃｍ３の直鎖状低密度ポリエチレンフィルムを用いた他は比較例２と同様にして外装材を製造した。
(Comparative Example 3)
Instead of the linear low density polyethylene film having a density of 0.923 g / cm 3 of Comparative Example 2, a linear low density polyethylene film having a density of 0.94 g / cm 3 was used. An exterior material was produced in the same manner.
（評価）
上記実施例および比較例で得られた真空断熱材の外装材について、耐突き刺し性を評価した。
なお、基材層側から突き刺した強度を「表→裏」、シーラント層側から突き刺した強度を「裏→表」と表記した。
(Evaluation)
The puncture resistance was evaluated for the vacuum insulation materials obtained in the above Examples and Comparative Examples.
The strength pierced from the base material layer side was expressed as “front → back”, and the strength pierced from the sealant layer side was expressed as “back → front”.
これらの評価結果を表１に示す。 These evaluation results are shown in Table 1.
以上のように本発明によって、耐突き刺し性に優れる真空断熱材の外装材を提供することが可能である。
また本発明による外装材を用いた真空断熱材を用いることにより、振動などによる衝撃に
よるピンホールが発生しにくい断熱容器を提供することが可能となる。
As described above, according to the present invention, it is possible to provide a vacuum heat insulating material having excellent puncture resistance.
Further, by using the vacuum heat insulating material using the exterior material according to the present invention, it is possible to provide a heat insulating container in which pinholes are not easily generated due to an impact due to vibration or the like.
さらに本発明の真空断熱材の外装材は、建装材など外部から突き刺しの恐れがあり、保冷や保温を必要とするクーラーボックスのほかあらゆる機器や設備に適用することが可能である。その結果、大幅な省エネルギー化や省スペース化にも貢献できる。 Furthermore, the exterior material of the vacuum heat insulating material of the present invention may be stabbed from the outside such as a building material, and can be applied to any device or facility other than a cooler box that needs to be kept cold or warm. As a result, it can contribute to significant energy saving and space saving.
１・・・真空断熱材
２・・・外装材
３・・・芯材
４・・・シール部
１０…延伸ポリプロピレンフィルム
１１…延伸ナイロンフィルム
１２…アルミ蒸着ポリエチレンテレフタレートフィルム
１３…アルミ蒸着エチレン−ビニルアルコール共重合体フィルム
１５…接着剤層
１６・・・外側
DESCRIPTION OF SYMBOLS 1 ... Vacuum heat insulating material 2 ... Exterior material 3 ... Core material 4 ... Seal part 10 ... Stretched polypropylene film 11 ... Stretched nylon film 12 ... Aluminum vapor deposition polyethylene terephthalate film 13 ... Aluminum vapor deposition ethylene-vinyl alcohol Copolymer film 15 ... adhesive layer 16 ... outside
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014030441A JP6511719B2 (en) | 2014-02-20 | 2014-02-20 | Vacuum insulation covering material and heat insulation container using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014030441A JP6511719B2 (en) | 2014-02-20 | 2014-02-20 | Vacuum insulation covering material and heat insulation container using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2015155715A true JP2015155715A (en) | 2015-08-27 |
| JP6511719B2 JP6511719B2 (en) | 2019-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2014030441A Active JP6511719B2 (en) | 2014-02-20 | 2014-02-20 | Vacuum insulation covering material and heat insulation container using the same |
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| Country | Link |
|---|---|
| JP (1) | JP6511719B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019034451A (en) * | 2017-08-10 | 2019-03-07 | 大日本印刷株式会社 | Laminate and package containing the same |
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| WO2012161303A1 (en) * | 2011-05-25 | 2012-11-29 | 積水フイルム株式会社 | Gas-barrier composite film and vacuum insulation material using same |
| JP2013103343A (en) * | 2011-11-10 | 2013-05-30 | Toppan Printing Co Ltd | Covering material for vacuum heat insulating material, and vacuum heat insulating material using the same |
| JP2015003427A (en) * | 2013-06-20 | 2015-01-08 | 凸版印刷株式会社 | Sheath material of vacuum heat insulation material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019034451A (en) * | 2017-08-10 | 2019-03-07 | 大日本印刷株式会社 | Laminate and package containing the same |
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