CN106793196B - High-absorption rate film type electric heating sheet - Google Patents
High-absorption rate film type electric heating sheet Download PDFInfo
- Publication number
- CN106793196B CN106793196B CN201611061045.5A CN201611061045A CN106793196B CN 106793196 B CN106793196 B CN 106793196B CN 201611061045 A CN201611061045 A CN 201611061045A CN 106793196 B CN106793196 B CN 106793196B
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- CN
- China
- Prior art keywords
- electric heating
- emissivity
- insulating layer
- film type
- adhesive layer
- 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.)
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- 238000005485 electric heating Methods 0.000 title claims abstract description 26
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 239000010410 layer Substances 0.000 claims abstract description 22
- 239000012790 adhesive layer Substances 0.000 claims abstract description 13
- 239000004642 Polyimide Substances 0.000 claims abstract description 8
- 229920001721 polyimide Polymers 0.000 claims abstract description 8
- 229910001006 Constantan Inorganic materials 0.000 claims abstract description 4
- 239000010408 film Substances 0.000 claims description 24
- 239000010409 thin film Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000003595 spectral effect Effects 0.000 abstract 1
- 238000005530 etching Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000007731 hot pressing Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
Landscapes
- Surface Heating Bodies (AREA)
Abstract
The invention relates to a device required by heating components and discloses a high-absorptivity film type electric heating sheet, which comprises a high-absorptivity/emissivity insulating layer, a conductive heating loop, an adhesive layer and a lead-out wire; the adhesive layer is attached to the surface of an object to be heated in a vacuum environment, and the conductive heating loop is led out by a lead-out wire and attached between the high absorption/emissivity insulating layer and the adhesive layer. The high absorption/emissivity insulating layer adopts a high absorption/emissivity polyimide insulating layer, the conductive heating loop adopts a constantan electric heating layer, and the adhesive layer adopts a polyimide insulating layer. The film type electric heating sheet with high absorption/emissivity has the characteristics of simple structure, high spectral absorptivity and high energy conversion efficiency.
Description
Technical Field
The invention relates to a device required by surface absorptivity test, emissivity test, vacuum volatilization performance test, high-temperature service life test and the like, and can maintain the working temperature of components with lower power.
Background
The electric heating sheet is composed of two layers of insulating films, a conductive heating body and a lead-out wire. The invention generates heat by electrifying the conductive heating body and heating, and ensures the working temperature of components by matching with the temperature sensor. In the vacuum environment, heat radiation is the most effective way for heat exchange of an object, and the invention absorbs infrared rays emitted by other surrounding elements to generate additional heat through the insulating film with high surface absorption/emissivity, reduces the power consumption on the premise of the same heat productivity, and effectively reduces the temperature through high emissivity to balance the environment temperature under the condition of higher self temperature.
At present, no explanation or report of the similar technology of the invention is found, and similar data at home and abroad are not collected.
Disclosure of Invention
The invention develops a high-absorptivity film type electric heating sheet based on the electric heating principle, and the high-absorptivity film type electric heating sheet can be applied to maintaining the working temperature of aerospace product components. The high absorption/emissivity electric heating sheet developed by the invention has the characteristics of simple structure, uniform heating and wide application, and can maintain the working temperature of components with lower power.
The invention relates to a high-absorptivity film type electric heating sheet, which comprises a high-absorptivity/emissivity insulating layer, a conductive heating loop, an adhesive layer and a lead-out wire; the adhesive layer is attached to the surface of an object to be heated in a vacuum environment, and the conductive heating loop is led out by a lead-out wire and attached between the high absorption/emissivity insulating layer and the adhesive layer. Preferably, the high absorption/emissivity insulating layer is a high absorption/emissivity polyimide insulating layer.
Preferably, the conductive heating circuit adopts a constantan electrothermal layer.
Preferably, the adhesive layer is a polyimide insulating layer.
The key parameters of the high absorption/emissivity electric heating sheet researched by the invention comprise: surface absorptivity, surface emissivity, vacuum high-temperature performance, atmospheric high-temperature performance and vacuum air release performance. The surface absorption rate should not be lower than 0.85; the surface emissivity is not lower than 0.85; can be 1.33 multiplied by 10-3Continuously working at Pa and 150 ℃ for not less than 100 h; can continuously work for not less than 500h under atmospheric pressure and at 150 ℃; at a pressure not higher than 1X 10-4Pa and a temperature of 125 ℃ for 24 hours, the total mass loss of the electric heating device should be not more than 1 percent, and the condensable volatile matter on the cold surface at 25 ℃ should be not more than 0.1 percent.
The application forms of the high absorption/emissivity electric heating piece developed by the invention include but are not limited to: the electric heating piece developed by the invention can be attached to the surface of an object needing to be heated in a vacuum environment. The surface of the heated object should satisfy the following conditions: the heating temperature is not more than 150 ℃, and the size of the pasting surface is not less than 10mm multiplied by 10 mm.
Drawings
Fig. 1 is a schematic view of a high absorption rate thin film type electric heating sheet according to the present invention.
Detailed Description
The high-absorptivity film type electric heating sheet disclosed by the embodiment of the invention is composed of a high-absorptivity/emissivity polyimide insulating layer, a constantan electric heating layer, a polyimide insulating layer and a lead-out wire, and the working temperature of a heated component is maintained through electric heating, as shown in figure 1. According to the invention, through the insulating film with high surface absorption/emissivity, infrared rays emitted by surrounding high-temperature elements are absorbed in the relatively closed vacuum chamber, so that the energy consumption of the product is effectively reduced, and meanwhile, the high surface emissivity is used for assisting in maintaining the temperature balance in the chamber.
The specific implementation process of the high infrared absorptivity film type electric heating sheet developed by the invention is as follows:
step 1: stock preparation
And cutting the conductive metal sheet and the insulating film in proper shapes according to the shape of the heating sheet, performing vacuum hot pressing and covering the photosensitive dry film to prepare the heating sheet substrate.
And designing a conductive loop of the heating sheet according to the shape, the resistance value and the heating surface requirement of the heating sheet, and manufacturing the photosensitive film.
And a step 2: light sensing
And covering the photosensitive film on the base material, and printing the circuit on the photosensitive film on the photosensitive dry film through ultraviolet irradiation.
Step 3: etching of
The etching is divided into three steps of developing, etching and film removing:
1) and (3) developing: removing the non-photosensitive part on the photosensitive dry film through chemical developing solution, and leaving the printed and engraved design circuit;
2) etching: removing the part, which is not covered and protected by the photosensitive dry film, of the conductive metal sheet through a chemical etchant to form a heating sheet heating loop;
3) removing the film: and removing the photosensitive dry film on the surface of the substrate by using a chemical solvent.
And step 4: shaping of
And welding the lead-out wire to a bonding pad of the conductive heating loop, covering the substrate with the insulating film with high absorption/emissivity, carrying out vacuum hot pressing, trimming the shape, and curing at 165 ℃ for 60min to obtain a finished heating sheet.
Step 5: and (6) carrying out worker inspection.
Claims (2)
1. A high absorptivity film type electric heating sheet is characterized by comprising a high absorption/emissivity insulating layer, a conductive heating loop, an adhesive layer and a lead-out wire; the adhesive layer is attached to the surface of an object to be heated in a vacuum environment, and the conductive heating loop is led out by a lead-out wire and attached between the high-absorption/emissivity insulating layer and the adhesive layer;
the high absorption/emissivity insulating layer is a high absorption/emissivity polyimide insulating layer;
the conductive heating loop adopts a constantan electric heating layer;
the size of the adhesive layer is not less than 10mm multiplied by 10 mm;
the high-absorptivity film type electric heating sheet has good high-temperature performance and can reach the temperature of 1.33 multiplied by 10-3The continuous work is not less than 100h at Pa and 150 ℃, and can be not less than 500h at atmospheric pressure and 150 ℃;
the high-absorptivity film type electric heating sheet has good vacuum air release performance, and the pressure is not higher than 1 x 10-4Pa, the temperature is 125 ℃, the total mass loss of the electric heating device is not more than 1 percent, and the condensable volatile matter on the cold surface at 25 ℃ is not more than 0.1 percent;
the lead-out wires are connected to the heating loop bonding pads in a welding mode.
2. A high absorption rate thin film type electric heating sheet as claimed in claim 1, wherein said adhesive layer is a polyimide insulating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611061045.5A CN106793196B (en) | 2016-11-28 | 2016-11-28 | High-absorption rate film type electric heating sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611061045.5A CN106793196B (en) | 2016-11-28 | 2016-11-28 | High-absorption rate film type electric heating sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106793196A CN106793196A (en) | 2017-05-31 |
| CN106793196B true CN106793196B (en) | 2020-06-19 |
Family
ID=58913359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611061045.5A Active CN106793196B (en) | 2016-11-28 | 2016-11-28 | High-absorption rate film type electric heating sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106793196B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111526614A (en) * | 2020-05-12 | 2020-08-11 | 北京宏宇航天技术有限公司 | Radiation-resistant film electric heater for spacecraft and manufacturing process thereof |
| CN111526611A (en) * | 2020-05-12 | 2020-08-11 | 北京宏宇航天技术有限公司 | Thin film electric heater for spacecraft and manufacturing method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2537187Y (en) * | 2002-02-25 | 2003-02-19 | 陈林 | Infrared radiating self temperature controlled metal electric heating film |
| WO2004062319A1 (en) * | 2003-01-02 | 2004-07-22 | Lapin Vladimir P | Monolithic self-regulating metal-ceramic heater |
| CN102548064A (en) * | 2010-12-21 | 2012-07-04 | 龙友科技（深圳）有限公司 | Electric heating piece, electric heating device and equipment |
| CN205081983U (en) * | 2015-10-08 | 2016-03-09 | 深圳市暖暖电热有限公司 | High far infrared emissivity electric heat membrane |
-
2016
- 2016-11-28 CN CN201611061045.5A patent/CN106793196B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2537187Y (en) * | 2002-02-25 | 2003-02-19 | 陈林 | Infrared radiating self temperature controlled metal electric heating film |
| WO2004062319A1 (en) * | 2003-01-02 | 2004-07-22 | Lapin Vladimir P | Monolithic self-regulating metal-ceramic heater |
| CN102548064A (en) * | 2010-12-21 | 2012-07-04 | 龙友科技（深圳）有限公司 | Electric heating piece, electric heating device and equipment |
| CN205081983U (en) * | 2015-10-08 | 2016-03-09 | 深圳市暖暖电热有限公司 | High far infrared emissivity electric heat membrane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106793196A (en) | 2017-05-31 |
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