JPS63135694A - Heat insulator - Google Patents
Heat insulatorInfo
- Publication number
- JPS63135694A JPS63135694A JP61281139A JP28113986A JPS63135694A JP S63135694 A JPS63135694 A JP S63135694A JP 61281139 A JP61281139 A JP 61281139A JP 28113986 A JP28113986 A JP 28113986A JP S63135694 A JPS63135694 A JP S63135694A
- Authority
- JP
- Japan
- Prior art keywords
- heat insulator
- thermal conductivity
- urethane foam
- pressure
- foam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012212 insulator Substances 0.000 title claims description 14
- 239000006260 foam Substances 0.000 claims description 17
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 5
- 229920005862 polyol Polymers 0.000 claims description 5
- 150000003077 polyols Chemical class 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000002650 laminated plastic Substances 0.000 claims description 4
- 239000003381 stabilizer Substances 0.000 claims description 4
- 230000023402 cell communication Effects 0.000 claims description 3
- 239000012948 isocyanate Substances 0.000 claims description 3
- 150000002513 isocyanates Chemical class 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 description 9
- 210000004027 cell Anatomy 0.000 description 8
- 239000011162 core material Substances 0.000 description 6
- 238000009413 insulation Methods 0.000 description 4
- 210000002421 cell wall Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229910001562 pearlite Inorganic materials 0.000 description 2
- 229920001228 polyisocyanate Polymers 0.000 description 2
- 239000005056 polyisocyanate Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000004148 curcumin Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000004620 low density foam Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Thermal Insulation (AREA)
- Refrigerator Housings (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔竜業上の利用分野〕
本発明は冷蔵庫、ショーケース等に用いられる断熱体に
関するものである。[Detailed Description of the Invention] [Field of industrial application] The present invention relates to a heat insulator used in refrigerators, showcases, etc.
近年、断熱箱体の断熱性能を向上させるため内部を減圧
した断熱体を用いることが注目されている。In recent years, attention has been paid to the use of a heat insulating body with a reduced internal pressure in order to improve the heat insulation performance of the heat insulating box.
上記断熱体の芯材としてはパーライト等の粉末ハニカム
発泡体等が用いられ、該芯材を金属−プラスチックスラ
ミネートフィルムからなる容器で被覆し、この容器内を
減圧することで断熱体を構成している。A powdered honeycomb foam such as perlite is used as the core material of the heat insulator, and the core material is covered with a container made of metal-plastic laminate film, and the inside of this container is depressurized to form the heat insulator. ing.
上記断熱体に用いられるパーライトは平均粒径１０μｍ
程度であり、その圧力と熱伝導率の関係は第３図の８曲
線で示される。The pearlite used in the above heat insulator has an average particle size of 10 μm.
The relationship between pressure and thermal conductivity is shown by curve 8 in FIG.
その平均粒径を小さくすると圧力−熱伝導率曲線は第３
図の５曲線で示すようになり、内部圧力が１ ｔｏｒｒ
以上では低熱伝導率を示すが、Ｉｔｏｒｒ以下では逆に
高くなる傾向を示す。When the average particle size is decreased, the pressure-thermal conductivity curve becomes 3rd.
As shown by curve 5 in the figure, the internal pressure is 1 torr.
Above it shows a low thermal conductivity, but below Itorr it tends to increase.
又、連続気泡をもつ硬質ウレタンフオームを芯材とする
と、第３図のＣ線のようになり、高真空域ではパーライ
トより低熱伝導率を示すが、低真空域では極端に悪い。Furthermore, if a hard urethane foam with open cells is used as a core material, the result will be as shown by line C in Figure 3, which shows lower thermal conductivity than pearlite in a high vacuum region, but extremely poor in a low vacuum region.
硬質ウレタンフオームのポリオール、イソシアネートの
主原料及び触媒、整色材等を種々検討しても現状の技術
レベルでは８曲線を上回わることは困難である。Even if various studies are made on the polyol of the rigid urethane foam, the main raw materials and catalysts for the isocyanate, the coloring agent, etc., it is difficult to exceed the curve 8 at the current technological level.
上記の様に連通気泡硬質ウレタンフオームの気泡径の微
細化には限界があり、又無機粉末を微細化すると高真空
域で悪化するのは、１ｔｏｒｒ以下の真空度で熱伝導率
を決定する因子として芯材のもつ固有熱伝導率と固体間
の伝熱に起因する所が多いことが推測される。As mentioned above, there is a limit to the miniaturization of the cell diameter in open-cell rigid urethane foam, and the fact that miniaturization of inorganic powder deteriorates in high vacuum is a factor that determines thermal conductivity at a vacuum level of 1 torr or less. It is assumed that this is largely due to the inherent thermal conductivity of the core material and the heat transfer between solids.
又、Ｉｔｏｒｒ以下の低真空域では残存気体の平均自由
工程に起因する所が大きいことが推測される。Furthermore, in the low vacuum region of Itorr or less, it is presumed that the problem is largely due to the mean free path of the residual gas.
更に、高真空域では固体が少ない即ち充填密度が小さい
程、低真空域では固体が多い即ち充填密度が大きい程良
好な断熱性能を示す矛循性を有している。Furthermore, there is a paradox that in a high vacuum region, the less solids there are, that is, the packing density is lower, and in the low vacuum region, the more solids there are, that is, the packing density is higher, the better the insulation performance is.
本発明はその矛循性を克服するものである。The present invention overcomes that paradox.
本発明は、ポリオール、イソシアネート、触媒、整泡剤
、気泡連通化剤の混合物に、固有熱伝導率の比較的少な
い１０μ以下の微粉末を混合して連続気泡構造の硬質ウ
レタンフオームを形成し、この硬質ウレタンフオームを
芯材として金属−プラスチックラミネートフィルムから
なる容器で被い内部を減圧して密閉するものである。The present invention forms a rigid urethane foam with an open cell structure by mixing a fine powder of 10μ or less with relatively low intrinsic thermal conductivity with a mixture of polyol, isocyanate, catalyst, foam stabilizer, and cell communication agent. This hard urethane foam is used as a core material, and the container is covered with a metal-plastic laminate film, and the inside is sealed by reducing the pressure.
本発明によれば、連続気泡構造を有する硬質ウレタンフ
オーム生成にあたって固有熱伝導率の小さい１０μ以下
の微粉末が混入されるので気泡壁中に微粉末が埋め込ま
れることとなり、機械的強度が向上されると共に、低密
度フオームでも大気圧に抗し得、高真空域での固体伝熱
が押さえられる。According to the present invention, when producing a hard urethane foam having an open-cell structure, fine powder of 10 μm or less with low intrinsic thermal conductivity is mixed, so the fine powder is embedded in the cell walls, improving mechanical strength. In addition, even low-density foam can withstand atmospheric pressure, suppressing solid-state heat transfer in high vacuum regions.
又、上記微粉末粒子が連続気泡内にも突出することとな
るので残存気体の動きを規制する作用があり、低真空域
での高断熱性能が向上する。Furthermore, since the fine powder particles protrude into the open cells, they have the effect of regulating the movement of residual gas, improving high heat insulation performance in a low vacuum region.
断熱体１は、第１図に示す如く連続気泡構造の硬質ウレ
タンフオーム２を金属−プラスチックラミネートフィル
ムからなる容器３で被い、その内部を減圧して密閉して
居り、上記硬質ウレタンフオーム２は水酸基価３００〜
５００ｍ７ＫＯＨ／りのポリオール、ポリイソシアネー
ト、触媒、整泡剤、発泡剤及び気泡連通化剤と、固有熱
伝導率が比較的小さい二酸化シリコン、ケイ酸カルシウ
ムを主成分とする平均粒径１０μ以下の微粉末粒子を混
合して生成したものが用いられる。As shown in FIG. 1, the heat insulating body 1 has a hard urethane foam 2 with an open cell structure covered with a container 3 made of a metal-plastic laminate film, and the inside of the container 3 is sealed by reducing the pressure. Hydroxyl value 300~
500m7 KOH/litre of polyol, polyisocyanate, catalyst, foam stabilizer, blowing agent, and cell communication agent, and a microorganism with an average particle size of 10μ or less whose main components are silicon dioxide and calcium silicate, which have relatively low intrinsic thermal conductivity. A mixture of powder particles is used.
前記連続気泡構造の硬質ウレタンフオーム生成にあたっ
て実際に用いた品種と重量パーセントは次のようなもの
である。The types and weight percentages actually used in producing the open-cell structure rigid urethane foam are as follows.
ポリオールＥ １００（武田薬品工業製）整泡
剤Ｌ ５３４０ １．５ （日本ユニカー製）フ
レオンＲ−１１３０（旭硝子製）
触媒ＴＨＨＤＡ ２．０（花王製）気泡連通
剤 １．０（製鉄化学展）ＳｉＯ２３０（平
均粒径５μｍ）
ポリイソシアネー）ＣＲ−２００１４０（三井東圧製）
而して、上記原料をウレタン用高圧発泡機で発泡し、硬
化させた硬質ウレタンフオーム２を所定の大きさに切断
し上記断熱体１の芯材とする。Polyol E 100 (manufactured by Takeda Chemical Industries) Foam stabilizer L 5340 1.5 (manufactured by Nippon Unicar) Freon R-1130 (manufactured by Asahi Glass) Catalyst THHDA 2.0 (manufactured by Kao) Cell opening agent 1.0 (manufactured by Steel Chemical Exhibition) SiO230 (average particle size 5 μm) polyisocyanate) CR-200140 (manufactured by Mitsui Toatsu)
Then, the raw material is foamed using a high-pressure foaming machine for urethane, and the cured hard urethane foam 2 is cut into a predetermined size and used as the core material of the heat insulator 1.
上記のようにして作成された断熱体１の圧力−熱伝導率
曲線は第３図ｄ曲線となり、全般にわたって８曲線を上
回っている。The pressure-thermal conductivity curve of the heat insulator 1 created as described above is curve d in FIG. 3, which exceeds curve 8 throughout.
前記硬質ウレタンフオーム２の気泡構造模型図は第２図
で示すようになって居り、気泡壁Ａ中に微粉末粒子Ｂが
埋め込まれることにより機械的強度が向上する。父上記
微粉末粒子Ｂは気泡内にも突出することとなるので気泡
中の残存気体の動きが抑制され、低真空域での断熱性能
が向上する。The cell structure model of the hard urethane foam 2 is shown in FIG. 2, and the mechanical strength is improved by embedding the fine powder particles B in the cell walls A. Since the fine powder particles B also protrude into the bubbles, the movement of residual gas in the bubbles is suppressed, and the heat insulation performance in a low vacuum region is improved.
本発明は、以上の如く構成されたものであるから機能的
強度が向上するのみならず、広範囲の真空度にわたって
低い熱伝導率を示し、真空断熱体の生産性も向上するこ
とから大巾コストダウンを計ることができるという顕著
な効果を奏し得るものである。Since the present invention is constructed as described above, it not only improves functional strength, but also exhibits low thermal conductivity over a wide range of degrees of vacuum, and improves the productivity of the vacuum insulator, thereby reducing costs. This has the remarkable effect of being able to measure down.
第１図は本発明断熱体の縦断面図、第２図は同上断熱体
の気泡構造模型図、第３図は本発明断熱体及び従来断熱
体の圧力−熱伝導率の関係を示す特性線図である。
１：断熱体、２：硬質ウレタンフオーム、３：容器、Ａ
：気泡壁、Ｂ：微粉末粒子。Fig. 1 is a longitudinal cross-sectional view of the heat insulator of the present invention, Fig. 2 is a model diagram of the cell structure of the same heat insulator, and Fig. 3 is a characteristic line showing the relationship between pressure and thermal conductivity of the heat insulator of the present invention and the conventional heat insulator. It is a diagram. 1: Heat insulator, 2: Hard urethane foam, 3: Container, A
: Cell wall, B: Fine powder particles.
Claims (1)
連通化剤の混合物に固有熱伝導率の比較的少ない１０μ
以下の微粉末を混合して得られる連続気泡構造の硬質ウ
レタンフォームを、金属−プラスチックスラミネートフ
ィルムからなる容器で被い内部を減圧して密閉した事を
特徴としてなる断熱体。1. The mixture of polyol, isocyanate, catalyst, foam stabilizer, and cell communication agent has a relatively low inherent thermal conductivity of 10μ
A heat insulator characterized in that a rigid urethane foam with an open cell structure obtained by mixing the following fine powders is covered with a container made of a metal-plastic laminate film, and the inside is sealed by reducing the pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61281139A JPS63135694A (en) | 1986-11-25 | 1986-11-25 | Heat insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61281139A JPS63135694A (en) | 1986-11-25 | 1986-11-25 | Heat insulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63135694A true JPS63135694A (en) | 1988-06-08 |
Family
ID=17634907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61281139A Pending JPS63135694A (en) | 1986-11-25 | 1986-11-25 | Heat insulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63135694A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996032605A1 (en) * | 1995-04-13 | 1996-10-17 | Imperial Chemical Industries Plc | Non-planar evacuated insulation panels and a method for making same |
| CN102261136A (en) * | 2011-07-11 | 2011-11-30 | 潍坊三强集团有限公司 | Method for producing vacuum heat-insulating wall heat-preserving board by using leftovers of rock wool and mineral wool |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61103089A (en) * | 1984-10-23 | 1986-05-21 | シャープ株式会社 | Vacuum heat-insulating structure |
-
1986
- 1986-11-25 JP JP61281139A patent/JPS63135694A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61103089A (en) * | 1984-10-23 | 1986-05-21 | シャープ株式会社 | Vacuum heat-insulating structure |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996032605A1 (en) * | 1995-04-13 | 1996-10-17 | Imperial Chemical Industries Plc | Non-planar evacuated insulation panels and a method for making same |
| US5843353A (en) * | 1995-04-13 | 1998-12-01 | Imperial Chemical Industries Plc | Non-planar evacuated insulation panels and a method for making same |
| CN1076460C (en) * | 1995-04-13 | 2001-12-19 | 亨茨曼Ici化学品有限公司 | Non-planar evacuated insulation panels and method for making same |
| CN102261136A (en) * | 2011-07-11 | 2011-11-30 | 潍坊三强集团有限公司 | Method for producing vacuum heat-insulating wall heat-preserving board by using leftovers of rock wool and mineral wool |
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