CN216267999U - High-temperature-resistant membrane for vacuum insulation panel and vacuum insulation composite board - Google Patents
High-temperature-resistant membrane for vacuum insulation panel and vacuum insulation composite board Download PDFInfo
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- CN216267999U CN216267999U CN202121749513.4U CN202121749513U CN216267999U CN 216267999 U CN216267999 U CN 216267999U CN 202121749513 U CN202121749513 U CN 202121749513U CN 216267999 U CN216267999 U CN 216267999U
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Abstract
The utility model relates to a high-temperature-resistant membrane for a vacuum insulation panel and a vacuum insulation composite panel. The high-temperature-resistant film material for the vacuum insulation panel comprises a protective layer, a metal layer and a heat sealing layer which are sequentially stacked from top to bottom. The protective layer is a polyimide film layer. The heat sealing layer is a polyamide film layer. The high-temperature resistant film material still keeps good heat resistance at 200 ℃; the good barrier performance is still kept above 150 ℃; the temperature range of the vacuum insulation panel is widened, and the market application field is enlarged.
Description
Technical Field
The utility model relates to the technical field of vacuum insulation panels, in particular to a high-temperature-resistant membrane for a vacuum insulation panel and a vacuum insulation composite plate.
Background
The vacuum heat insulation plate is one kind of vacuum heat insulation material, is formed by filling a core material inside and covering a vacuum protection surface layer outside, effectively avoids heat transfer caused by air convection, thereby greatly reducing the heat conductivity coefficient.
The vacuum protection surface layer covered outside is often a material with high barrier property, which can block gas and liquid outside, and the common film layer at present is a multi-layer film, but the film is a vacuum insulation plate film material which can only resist 70 ℃ for a long time, and can not keep the performance of the vacuum insulation plate film material when the temperature is too high. Therefore, how to solve the above problems is one of the important research issues to be addressed at present to improve the use temperature range of the vacuum insulation panel.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide a high temperature resistant film for a vacuum insulation panel and a vacuum insulation composite panel, which can withstand a temperature of 70 degrees for a long period of time.
A high-temperature-resistant film for a vacuum insulation panel comprises a protective layer, a metal layer and a heat sealing layer which are sequentially stacked from top to bottom; the protective layer is a polyimide film layer; the heat sealing layer is a polyamide film layer.
When the temperature of the high-temperature resistant membrane is 200 ℃, good heat resistance is still kept; very good barrier properties are still maintained above 150 degrees.
In one embodiment, the protective layer, the metal layer and the heat sealing layer are bonded together by an adhesive.
In one embodiment, the protective layer has a thickness of 25 μm, the metal layer has a thickness of 7-9 μm, and the heat seal layer has a thickness of 25-40 μm.
In one embodiment, the adhesive bond between the protective layer, the metal layer and the heat seal layer is 1.5-4 μm thick.
In one embodiment, the metal layer is an aluminum foil layer.
In one embodiment, the adhesive is a polyurethane glue.
In one embodiment, the outer side of the protective layer is yellow; the outer side of the heat sealing layer is silvery.
The utility model also discloses a vacuum heat insulation composite plate, which comprises a vacuum heat insulation plate and a high temperature resistant membrane wrapped outside the vacuum heat insulation plate; the high-temperature-resistant membrane material is the high-temperature-resistant membrane material for the vacuum insulation panel.
Compared with the prior art, the utility model has the following beneficial effects:
the high-temperature resistant film material still keeps good heat resistance at 200 ℃; the good barrier performance is still kept above 150 ℃; the temperature range of the vacuum insulation panel is widened, and the market application field is enlarged.
Drawings
Fig. 1 is a film layer structure view of a high temperature resistant film for a vacuum insulation panel.
FIG. 2 is a layered view of the structure of the high temperature resistant film after being magnified 500 times.
Fig. 3 is a heat resistance test chart of the conventional film and the high temperature resistant film at 215 ℃.
FIG. 4 is a comparison of oxygen permeability for conventional and high temperature resistant membranes.
Fig. 5 is a schematic structural view of a vacuum insulation composite panel.
In the figure: 1-polyimide film layer, 2-aluminum foil layer and 3-polyamide film layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
Example 1
Referring to fig. 1, in the figure, 1 is a polyimide film layer, 2 is an aluminum foil layer, and 3 is a polyamide film layer. A high-temperature resistant film for a vacuum insulation panel is used for wrapping the vacuum insulation panel and used as an outer film of the vacuum insulation panel to improve the high-temperature resistance of the vacuum insulation panel. In this embodiment, the high temperature resistant film includes a protective layer, a metal layer, and a heat seal layer stacked in sequence, and is a multilayer film structure. The heat preservation is the polyimide film layer, and the side of keeping away from the metal level is bright yellow, plays the effect of high temperature resistant and high humidity, and in this embodiment, the thickness of protective layer is 25 mu m. The metal layer is an aluminum foil layer, and the thickness of the metal layer can be between 7 and 9 μm, and in the embodiment, the thickness of the metal layer is 8 μm. Of course, in other embodiments, the thickness of the metal layer may be 7 μm, or may be 9 μm, or may be a real value thereof in the range of 7-9 μm. The heat-sealing layer is a polyamide film layer, the side far away from the metal layer is silver, the function of ensuring non-melting in a high-temperature environment is achieved, the thickness of the heat-sealing layer can be 25-40 micrometers, and in the embodiment, the thickness of the heat-sealing layer is 32 micrometers. Of course, in other embodiments, the thickness of the heat-sealing layer may also be 25 μm, 30 μm, 35 μm, 40 μm, and so on.
In one embodiment, the high temperature resistant membrane is produced using a dry lamination process.
Referring to fig. 2, fig. 2 is a layered view of the structure of the high temperature resistant film after being magnified 500 times. Wherein, PI polyimide film layer, AL are the aluminium foil layer, and PA are polyamide film layer.
In this embodiment, two sides of the metal layer are respectively bonded to the protective layer and the heat seal layer by an adhesive. The thickness of the adhesive layer formed after the adhesion can be 1.5-4 μm. In this embodiment, the thickness of the adhesive layer is 3 μm, although in other embodiments, the thickness of the adhesive layer may also be 1.5 μm, 2 μm, 2.5 μm, 3.5 μm, 4 μm, and so forth.
In one embodiment, the adhesive is selected to be resistant to polyurethane glue above 200 degrees to ensure that the film does not delaminate.
The performance of the prepared high-temperature resistant film was also tested, and a conventional film on the market was used as a comparison. The details are as follows.
a. Film Heat resistance test
And (3) testing conditions are as follows: the conventional film and the high temperature film were cut into a sample of 100mm × 100mm in size, and placed on a heating stage. The change of the film material was observed from 0 degree to 200 degree. After reaching 200 degrees, the temperature was kept for 24, 48, 72, 96 and 144 hours to observe the change of the membrane material.
The test shows that in the process of heating the conventional film and the high-temperature-resistant film on the heating table, when the temperature reaches 100 ℃, the common film starts to soften, and when the temperature reaches 150 ℃, the inner layer of the common film starts to melt. Referring to fig. 3, in fig. 3, the left side film material is the high temperature resistant film material of the present embodiment, the right side film material is a conventional film, and the heating stage temperature is 215 ℃. At 215 degrees, the ordinary film delaminated completely. The appearance of the high-temperature-resistant film of the embodiment is not changed, and the phenomena of peeling, melting, layering, bubbles and the like are avoided.
b. Film barrier test
The oxygen permeability and water permeability of the conventional membrane and the high temperature resistant membrane of this example are shown in table 1 at room temperature.
Table 1 shows the results of oxygen permeability and water permeability tests for conventional membranes and high temperature resistant membranes.
The oxygen permeability data for the conventional membrane and the high temperature resistant membrane of this example at different temperatures are shown in table 2.
Table 2 is a table of oxygen permeability data for conventional and high temperature resistant membranes at different temperatures.
Through tests and by combining the data in tables 1 and 2, the barrier properties of the conventional film and the high-temperature resistant film are equivalent under the normal temperature condition, and correspondingly increase along with the increase of the temperature, but when the temperature exceeds 100 ℃, the barrier property of the common VIP film is rapidly reduced, almost fails at more than 150 ℃, and the high-temperature resistant film of the embodiment still maintains very good barrier property.
Referring to fig. 4, fig. 4 is a comparison test of oxygen permeability of the conventional membrane and the high temperature resistant membrane. Wherein the straight line represents the high temperature resistant film and the broken line represents the conventional film.
The high-temperature resistant film of the embodiment has no change in appearance on a 215-DEG C heating table, has no phenomena of peeling, melting, layering, bubbles and the like, and has good heat resistance; very good barrier properties are still maintained above 150 degrees.
Example 2
Referring to fig. 5, the present embodiment discloses a vacuum insulation composite panel, which includes a vacuum insulation panel and a high temperature resistant film wrapped outside the vacuum insulation panel; the high-temperature-resistant film used for the vacuum insulation panel in example 1 was used as the high-temperature-resistant film. In the figure, B is a vacuum insulation plate, and M is a high temperature resistant film.
The performance of the vacuum insulation composite panel was also tested in this example, and a conventional panel on the market was used as a comparison. The details are as follows.
c. Thermal conductivity test
And (5) comparing and testing the conditions at normal temperature, wherein the test results are shown in table 3.
Table 3 is a table of the thermal conductivity test results at room temperature.
The 200 degree condition alignment test shows the test results in table 4.
Table 4 shows the results of the thermal conductivity test at 200 ℃.
Through comparison tests at normal temperature and 200 ℃, the two types of plates are consistent in oxygen barrier property and thermal conductivity under the condition of being placed at normal temperature; the conventional board failed in 1 day when tested at a high temperature of 200 ℃, while the composite board of the present example maintained thermal insulation performance for 30 days. Experiments show that if the efficient getter is placed inside, the heat insulation performance of the composite board can be maintained for 180 days.
d. Thermal conductivity test
The test method comprises the following steps: two 300 x 10 samples of the sheet were placed on a 230 degree heating stage and the temperature of the sheet on the air contact surface was measured with a contact temperature probe every 24 hours.
The test results are shown in Table 5.
Table 5 shows the results of the thermal conductivity measurements.
It can be found by testing and combining table 5 that the conventional sheet made of the general conventional film loses vacuum on the surface of the sheet in a short time, the thermal conductivity of the sheet also increases to that of the core material, and the surface contacting with air is consistently maintained at 83 degrees by detecting the temperature. The surface temperature of the composite board made of the high-temperature-resistant film is always maintained at about 60 ℃ in 4 days of continuous testing, so that the composite board made of the high-temperature-resistant film is judged to always keep high heat insulation performance.
The vacuum insulation composite board of the embodiment has good insulation performance.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the application of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present application should be defined by the appended claims.
Claims (10)
1. The high-temperature-resistant film for the vacuum insulation panel is characterized by comprising a protective layer, a metal layer and a heat sealing layer which are sequentially overlapped from top to bottom; the protective layer is a polyimide film layer; the heat sealing layer is a polyamide film layer.
2. The high temperature resistant film for vacuum insulation panels according to claim 1, wherein the protective layer, the metal layer and the heat seal layer are bonded together by an adhesive.
3. The high temperature resistant film for vacuum insulation panels according to claim 1, wherein the thickness of the protective layer is 25 μm.
4. The high temperature resistant film for vacuum insulation panels according to claim 1, wherein the metal layer has a thickness of 7-9 μm.
5. The high temperature resistant film for vacuum insulation panels according to claim 1, wherein the thickness of the heat seal layer is 25-40 μm.
6. The high temperature resistant film for vacuum insulation panels according to claim 1, wherein the adhesive bond thickness between the protective layer, the metal layer and the heat seal layer is 1.5-4 μm.
7. The high temperature resistant membrane for vacuum insulation panels according to claim 1, wherein the metal layer is an aluminum foil layer.
8. The high temperature resistant film for vacuum insulation panels according to claim 2, wherein the adhesive is polyurethane glue.
9. The high temperature resistant film for a vacuum insulation panel according to claim 1, wherein the outer side of the protective layer is yellow; the outer side of the heat sealing layer is silvery.
10. The vacuum heat insulation composite board comprises a vacuum heat insulation board and is characterized by also comprising a high-temperature-resistant film wrapped outside the vacuum heat insulation board; the high temperature resistant membrane material is the high temperature resistant membrane material for the vacuum insulation panel according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121749513.4U CN216267999U (en) | 2021-07-29 | 2021-07-29 | High-temperature-resistant membrane for vacuum insulation panel and vacuum insulation composite board |
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| CN202121749513.4U CN216267999U (en) | 2021-07-29 | 2021-07-29 | High-temperature-resistant membrane for vacuum insulation panel and vacuum insulation composite board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113547815A (en) * | 2021-07-29 | 2021-10-26 | 安徽省恳思惠新型材料有限责任公司 | High-temperature-resistant membrane for vacuum insulation panel and vacuum insulation composite board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113547815A (en) * | 2021-07-29 | 2021-10-26 | 安徽省恳思惠新型材料有限责任公司 | High-temperature-resistant membrane for vacuum insulation panel and vacuum insulation composite board |
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