CN85106548A - Multilayer heat insulation - Google Patents
Multilayer heat insulation Download PDFInfo
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- CN85106548A CN85106548A CN 85106548 CN85106548A CN85106548A CN 85106548 A CN85106548 A CN 85106548A CN 85106548 CN85106548 CN 85106548 CN 85106548 A CN85106548 A CN 85106548A CN 85106548 A CN85106548 A CN 85106548A
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- wall
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- heat insulation
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Abstract
A kind of multilayer heat insulation belongs to the Thermo Isolation Technique field.This multilayer heat insulation is only by the polyester film combination that is coated with high-reflectivity metal, no wall.Polyester film is mylar, Kapton, polypropylene film etc.The high-reflectivity metal film is Al, Cu, Ag, An etc., and radiance is below 0.06.This multilayer system has good insulation effect, and is in light weight, volume is little, intensity is high, technology capability is good, low cost and other advantages.
Description
The invention belongs to the Thermo Isolation Technique field, this Mutilayer insulating system is used for can be used as the thermal insulation of various cryogenic liquid vessels in the middle of the hot and cold vacuum sandwich, is particularly suitable for the aircraft thermal control and uses.
Known aircraft is extensive use of multilayer heat insulation and carries out thermal control, large usage quantity.According to the aerospace engineering characteristics, multilayer system commonly used is to make radiation screen with the polyester film that is coated with high-reflectivity metal, makes wall with fiber-based material (cloth, paper, net etc.) and forms.The weight that alleviates heat control material is of great importance.Method commonly used is to adopt thin material as far as possible.Fold, plating leakage etc. can be met difficulty, be taken place easily to thin polyester film on the technology when plating.Thin fiber-based material intensity is very low, and is very easily broken, the cost height.These are owing to select for use thin material to cause entirely, therefore with the way of attenuate usefulness material thickness, reach that to alleviate thermal control be that certain limit is arranged with the weight of material.
Also have and adopt the single face plating polyester film of fold to come combination multilayer system, no wall.Though this method can make the weight of system obviously be alleviated.But reflecting coating is destroyed, and radiance increases, and the radiation tunnel effect of system increases, and the insulation effect of system is reduced.
The problems referred to above fail to obtain satisfied the solution.
The inventor notices that the heat conductivity of polyester film own is low, can play the wall effect, has good deflection again, is difficult for being in contact with one another.Thereby propose only to be coated with high-reflectivity metal polyester film combination multilayer system with single or double, without the fibrous type wall, also fold not.Can avoid above-mentioned various rough sledding to take place.Because the weight of no this multilayer system of wall is alleviated significantly, and is over half approximately.
Multilayer system provided by the invention has good insulation effect, and is close with other multilayer systems of having used (make wall with fiber-based material, fold etc.) insulation effect.The weight of system significantly alleviates, volume-diminished, intensity height, technology capability are good, multilayer system is made up of single component, and is easy to use.
The embodiment of the invention 1 is with the mylar of 10 micron thickness, carries out vacuum and aluminize, plate single or double, radiance continuously below 0.06, uses this combination of materials.This multilayer system is 10
-5It is as follows to record heat-insulating property under the millimeter of mercury degree of vacuum:
1. the heat-insulating property of all kinds multilayer system is shown in table 1 under the same conditions.
Data from table 1 find out that various types of multilayer system insulation effects are close.No wall system weight is significantly alleviated.About 15 grams of the every weight per square meter of every individual layer, volume is little, 10 microns of every thickness in monolayer.Be made up of single constituent element, easy to use, cost is low.
2. the different multilayer system heat-insulating property of radiation screen number is shown in table 2.
Data are found out from table 2, and two kinds of best radiation screen numbers of system are all more than 23, and under identical screen said conditions, their heat-insulating property is more or less the same, and show that once more the fibrous type wall is little to improving system's heat-insulating property effect, increase system weight on the contrary.
3. under the situation that the side direction thermal loss is arranged, the heat-insulating property of wall and no wall two class multilayer systems is arranged, be shown in table 3.
When the side direction thermal loss was arranged, the insulation effect of two type systematics all decreased, but did not have less that the system insulation effect of wall reduces, and showed that this system lateral heat waste is few.
The adiabaticity of various systems
Table 1
The heat-transfer coefficient effective thermal conductivity
System in combination weight screen number thickness huyashi-chuuka (cold chinese-style noodles) temperature hot-face temperature kcal/m
2.h, ℃ keal/m.h. ℃
Two-sided aluminizing washed g/m
2Mm ℃ ℃
-77.1 27.5 0.076 5.02×10
-4
Synthetic fibre film+dressing 31.6 28 9.5
Paper 26.0 110.8 0.154 10.21 * 10
-4
Two-sided aluminizing washs-87.3 32.2 0.084 5.39 * 10
-4
Synthetic fibre film+KT-30.2 29 9.4
231 nylon wires 25.9 130 0.157 9.98 * 10
-4
Single face is aluminized and is washed
The synthetic fibre film, fold 16.0 30 3.0 28.0 117.3 0.165 4.27 * 10
-4
No wall
Two-sided aluminizing washs-82.0 27.6 0.071 1.81 * 10
-4
The synthetic fibre film, continuously 14.9 34 2.9
Interlayer 26.2 116.3 0.143 3.65 * 10
-4
Single face is aluminized and is washed
The synthetic fibre film, continuously 14.9 30 2.2 24.3 120.9 0.149 2.89 * 10
-4
Interlayer
The adiabaticity of the various radiation screen number systems of table 2
Huyashi-chuuka (cold chinese-style noodles) temperature hot-face temperature heat-transfer coefficient effective thermal conductivity
Several ℃ ℃ of kcal/m of system in combination screen
2, h, ℃ kcal/m, h, ℃
The two-sided terylene 34 22.7 117.9 0.133 8.21 * 10 of aluminizing
-4
Film+KT-231 23 25.0 117.5 0.136 8.42 * 10
-4
Nylon wire 13 27.2 115.6 0.166 4.24 * 10
-4
The two-sided terylene 34 21.5 116.4 0.133 2.5 * 10 of aluminizing
-4
Film, no wall 23 23.7 117.0 0.133 2.5 * 10
-4
13 26.3 117.7 0.158 1.6×10
-4
The adiabaticity of two type systematics when table 3 has the side direction thermal loss
System in combination wrapping mode thickness huyashi-chuuka (cold chinese-style noodles) temperature hot-face temperature heat-transfer coefficient effective thermal conductivity
mm ℃ ℃ kcal/m
2，h，℃ kcal/m，h，℃
Two-sided aluminizing washed 23 layers of winding 5.40 25.0 117.5 0.136 8.42 * 10 continuously
-4
Synthetic fibre film+KT-
231 nylon wires once twine 5.76 25.6 94.6 0.212 9.69 * 10 for 30 layers
-4
Two-sided aluminizing washed 23 layers of winding 1.60 24.0 117.0 0.134 2.53 * 10 continuously
-4
The synthetic fibre film, continuously
Interlayer once twines 1.43 24.5 102.4 0.187 2.50 * 10 for 30 layers
-4
When the side direction thermal loss was arranged, the insulation effect of two type systematics all decreased, but did not have less that the system insulation effect of wall reduces, and showed that this system lateral heat waste is few.
The embodiment of the invention 2 is to be the Kapton of 30 μ with thickness, aluminizes continuously through vacuum, plates two-sidedly, and radiance reaches below 0.06, with this combination of materials, novel multi-layer system 10
-5It is as follows to record heat-insulating property under the millimeter of mercury vacuum:
1. under the same conditions, there is the adiabaticity of wall and no wall system to be shown in table 4.
Table 4
System in combination screen number thickness huyashi-chuuka (cold chinese-style noodles) temperature hot-face temperature heat-transfer coefficient effective thermal conductivity
mm ℃ ℃ kcal/m
2，h，℃ kcal/m，h，℃
Two-sided aluminizing gathers 30.3 245.4 0.209 5.32 * 10
-4
Imide membrane, 34 2.9 28.6 174.1 0.169 4.18 * 10
-4
No wall-56.4 55.1 0.084 2.12 * 10
-4
Two-sided aluminizing gathers 23.9 232.9 0.224 1.25 * 10
-3
Imide membrane 28 7.4 30.4 160.1 0.184 1.03 * 10
-3
+ terylene net-53.7 40.3 0.096 5.45 * 10
-4
Their heat-insulating properties of data representation in the table 4 are close, also are the same under higher temperature.No wall system weight is light, volume, and good manufacturability, cost is low.
3. system's heat-insulating property of various radiation screen numbers is shown in table 5.
The adiabaticity of the various radiation screen number systems of table 5
System in combination screen number thickness huyashi-chuuka (cold chinese-style noodles) temperature hot-face temperature heat-transfer coefficient effective thermal conductivity
mm ℃ ℃ kcal/m
2，h，℃ kcal/m，h，℃
Two-sidedly aluminize 5 1.36 38.0 119.2 0.272 3.48 * 10
-4
Polyimide 10 1.95 35.5 142.8 0.209 3.73 * 10
-4
Film continuously 15 2.90 33.7 161.2 0.175 4.48 * 10
-4
Interlayer 34 2.90 28.6 174.1 0.169 4.18 * 10
-4
Claims (3)
1, a kind of Mutilayer insulating system that belongs to the Thermo Isolation Technique field comprises that the polyester film of single or double plating high-reflectivity metal is made radiation screen, it is characterized in that not having wall.
2, by the described polyester film of claim 1, it is characterized in that it to be mylar, Kapton, polypropylene film etc.
3, by the described high-reflectivity metal of claim 1, it is characterized in that being Al, Cu, Ag, Au etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85106548A CN85106548B (en) | 1985-08-22 | 1985-08-22 | Multilayer insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85106548A CN85106548B (en) | 1985-08-22 | 1985-08-22 | Multilayer insulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85106548A true CN85106548A (en) | 1987-02-18 |
| CN85106548B CN85106548B (en) | 1988-10-19 |
Family
ID=4795138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85106548A Expired CN85106548B (en) | 1985-08-22 | 1985-08-22 | Multilayer insulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85106548B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1045490C (en) * | 1993-01-01 | 1999-10-06 | 林斯璋 | Product with film heat-insulating function layer |
| CN103016908A (en) * | 2012-12-13 | 2013-04-03 | 上海宇航系统工程研究所 | Multilayer heat-insulating flexible cover with variable volume |
| CN108437587A (en) * | 2018-01-25 | 2018-08-24 | 合肥中科富华新材料有限公司 | A kind of novel organic film material of heat-insulating sound-insulating |
| CN109357768A (en) * | 2018-11-02 | 2019-02-19 | 中国空间技术研究院 | A kind of heat loss through radiation surface optical coefficient measuring device |
| CN111572152A (en) * | 2020-05-11 | 2020-08-25 | 航天材料及工艺研究所 | Multilayer heat insulation assembly for spacecraft and preparation method thereof |
-
1985
- 1985-08-22 CN CN85106548A patent/CN85106548B/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1045490C (en) * | 1993-01-01 | 1999-10-06 | 林斯璋 | Product with film heat-insulating function layer |
| CN103016908A (en) * | 2012-12-13 | 2013-04-03 | 上海宇航系统工程研究所 | Multilayer heat-insulating flexible cover with variable volume |
| CN103016908B (en) * | 2012-12-13 | 2015-09-30 | 上海宇航系统工程研究所 | The soft cover of multilayer insulation of variable volume |
| CN108437587A (en) * | 2018-01-25 | 2018-08-24 | 合肥中科富华新材料有限公司 | A kind of novel organic film material of heat-insulating sound-insulating |
| CN109357768A (en) * | 2018-11-02 | 2019-02-19 | 中国空间技术研究院 | A kind of heat loss through radiation surface optical coefficient measuring device |
| CN111572152A (en) * | 2020-05-11 | 2020-08-25 | 航天材料及工艺研究所 | Multilayer heat insulation assembly for spacecraft and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85106548B (en) | 1988-10-19 |
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