VACUUM INSULATION PANEL

Abstract

The invention relates to a vacuum insulation panel, having a core (1) of open-pore material and having a casing (2), which encloses the core (1) tightly, completely and in a gas-tight manner on all sides, wherein the casing (2) has at least one gas-tight barrier layer (3). Said vacuum insulation panel is characterized in that the casing (2) has a protective layer (6) of a heat-resistant material in at least one region of the outer surface of the vacuum insulation panel on the outside of the barrier layer (3) or on an intermediate layer (4) located on the outside of the barrier layer (3).

Claims

1. A vacuum insulation panel comprising: a core of open-pore material; and an enclosure enclosing the core in a close-fitting, complete and gas-tight manner on all sides, the enclosure having at least one gas-tight barrier layer, wherein the enclosure has in at least one region of the outer surface of the vacuum insulation panel a protective layer of a heat-resistant material on the outside of the barrier layer or on an intermediate layer located on the outside of the barrier layer.

2. The vacuum insulation panel of claim 1, wherein the enclosure has on the inner side of the barrier layer a sealing layer of plastic and the sealing layer abuts on the core or on at least one inner intermediate layer, the inner intermediate layer comprising a woven plastic or knitted fabric or paper.

3. The vacuum insulation panel of claim 1, wherein the enclosure consists of two sheet-like enclosure parts, which are placed with their sealing layers running around peripherally, the two sheet-like enclosure parts connected to one another in a sealed, gas-tight configuration.

4. The vacuum insulation panel of claim 1, wherein an entirety of the enclosure is provided with the heat-resistant protective layer.

5. The vacuum insulation panel of claim 1, wherein the heat-resistant protective layer is a film that can be handled independently and is otherwise permanently connected to the enclosure by adhesive bonding.

6. The vacuum insulation panel of claim 1, wherein the heat-resistant protective layer consists substantially of mica particles.

7. The vacuum insulation panel of claim 6, wherein the mica particles of the heat-resistant protective layer are applied and fixed on a sheet-like carrier material, wherein the sheet-like carrier material is a woven glass-fiber or knitted fabric or a film of plastic, or a PET film.

8. The vacuum insulation panel of claim 7, wherein: the sheet-like carrier material is formed by the intermediate layer located on the barrier layer, or the sheet-like carrier material, in a multi-ply configuration, is formed by the intermediate layer located on the outermost barrier layer.

9. The vacuum insulation panel of claim 7, wherein the mica particles are pre-fixed on the sheet-like carrier material with a binder.

10. The vacuum insulation panel of claim 7, wherein the mica particles on the sheet-like carrier material are covered and fixed by an outer top layer.

11. The vacuum insulation panel of claim 6, wherein the thickness of the heat-resistant protective layer is between 20 m and 300 m, or between 50 m and 150 m.

12. The vacuum insulation panel of claim 1, wherein the heat-resistant protective layer consists substantially of a material that expands when exposed to heat.

13. The vacuum insulation panel of claim 12, wherein the thickness of the expandable heat-resistant protective layer is between 0.5 mm and 5 mm, between 2 mm and 3 mm.

14. An enclosure film for vacuum insulation panels with at least one gas-tight barrier layer, wherein the enclosure film has a protective layer of a heat-resistant material on an outside of the barrier layer or on an intermediate layer located on the outside of the barrier layer.

15. The enclosure film of claim 14, wherein the heat-resistant protective layer consists of mica particles which are applied and fixed directly to the barrier layer or to the intermediate layer located on the outside of the barrier layer.

16. The enclosure film of claim 15, wherein the mica particles are fixed with a binder and/or are covered and fixed by an outer top layer, or a PET.

17. The enclosure film of claim 14, wherein the heat-resistant protective layer consists substantially of a material that expands when exposed to heat, which is applied directly to and fixed to the barrier layer or the intermediate layer located on the outside of the barrier layer.

18. The vacuum insulation panel of claim 6, wherein the heat-resistant protective layer consists substantially of mica particles on the basis of phlogopite or muscovite.

19. The enclosure film of claim 15, wherein the heat-resistant protective layer consists substantially of mica particles on the basis of phlogopite or muscovite.

Description

IN THE DRAWING

[0036] FIG. 1 shows in a schematic representation a first exemplary embodiment of a vacuum insulation panel according to the invention,

[0037] FIG. 2 shows in a schematic representation a second exemplary embodiment of a vacuum insulation panel according to the invention,

[0038] FIG. 3 shows in a schematic representation a third exemplary embodiment of a vacuum insulation panel according to the invention,

[0039] FIG. 4 shows in a schematic representation an exemplary embodiment of an enclosure film for vacuum insulation panels according to the invention,

[0040] FIG. 5 shows in a schematic representation a further exemplary embodiment of an enclosure film for vacuum insulation panels according to the invention.

[0041] In the figures, the dimensions are not to scale, but greatly exaggerated, to allow the structure to be explained well.

[0042] The first exemplary embodiment, represented in FIG. 1, shows a vacuum insulation panel with a core 1 of open-pore material and an enclosure 2 enclosing the core 1 in a close-fitting, complete and gas-tight manner on all sides. As can be seen from the detail in FIG. 1, which to this extent is also representative of the other figures, the enclosure 2 has at least one gas-tight barrier layer 3. In the exemplary embodiment that is represented and preferred, this consists of a thin metallization of aluminum, for example in the layer thickness known from the prior art of 5 m to 10 m. In the exemplary embodiment represented, an intermediate layer 4 of PET, in a thickness of for example 15 m, can be seen on the outside of the barrier layer 3. In the exemplary embodiment represented, a sealing layer 5 of plastic, here in particular of polyethylene, in a thickness here of 50 m, can also be seen on the inside of the barrier layer 3.

[0043] As has already been explained in relation to the prior art, the sealing layer 5 either abuts on the core 1 or between the sealing layer 5 and the core there is also a further intermediate layer, preferably of a plastics woven or knitted fabric or of paper, as has been mentioned above in relation to the prior art.

[0044] FIG. 1 shows a continuous enclosure 2, because it is a schematic representation. Very often, however, an enclosure 2 of two sheet-like enclosure parts or even of multiple enclosure parts, which are placed with their sealing layers running around peripherally and are connected to one another in a gas-tight manner by sealing, will be provided.

[0045] As far as the barrier layer 3 is concerned, reference is made to DE 20 2014 002 192 U1, which gives many examples of various structures of the barrier layer 3, which can also be used within the scope of the teaching of the invention. The same applies correspondingly to the structure described there of the enclosure 2 as a whole and also to the composition of the core 1, all of which can also be used within the scope of the teaching of the present invention.

[0046] In FIG. 1, it is therefore also indicated that the enclosure 2 also has in at least one region of the outer surface of the vacuum insulation panel a protective layer 6 of a heat-resistant material on the outside of the barrier layer 3 or on an intermediate layer 4 located on the outside of the barrier layer 3. In FIG. 1, this heat-resistant protective layer 6 can be seen on top of the vacuum insulation panel, that is to say on a main surface of the vacuum insulation panel.

[0047] In the case of the exemplary embodiment from FIG. 2, by contrast, it can be seen that here the complete enclosure 2 is provided with the heat-resistant protective layer 6.

[0048] It can be verified well from FIG. 1 that, according to the preferred teaching of the invention, it is particularly expedient technically in terms of handling that the heat-resistant protective layer 6 is configured as a sheet that can be handled independently and is otherwise permanently connected to the enclosure 2 by adhesive bonding. To this extent, with regard to the term adhesive bonding, reference may be made to the explanations that have been given in this regard in the introductory part of the description.

[0049] In the case of the exemplary embodiments of FIGS. 1 and 2, it is therefore specifically provided that the heat-resistant protective layer 6 consists substantially of mica particles, in particular on the basis of phlogopite or muscovite, fixed with a binder.

[0050] In principle, it would be conceivable that the heat-insulating protective layer 6 of mica particles is produced for example by the mica particles being scattered evenly onto the surface of the enclosure 1 provided with adhesive binder. That would be an application of the protective layer 6 as it were in situ.

[0051] The previously mentioned variant uses the intermediate layer 4 located on the barrier layer 3 or, in the case of a multi-ply configuration, the intermediate layer 4 located on the outermost barrier layer 3 as a sheet-like carrier material for the mica particles evenly distributed on it. These may be pre-fixed on the sheet-like carrier material as previously explained.

[0052] According to the preferred teaching, the mica particles located on the sheet-like carrier material are covered and fixed by an outer top layer 6, this outer top layer 6 preferably consisting of PET.

[0053] The variant already described in the general part of the description, with a sheet that can be independently handled, is also expedient. To this extent, it is provided with preference in the exemplary embodiments of FIG. 1 and FIG. 2 that the mica particles of the heat-resistant protective layer 6 are applied and fixed on a sheet-like carrier material, in particular on a glass-fiber woven or knitted fabric, in particular a PET film. Reference may be made to the explanations of this in the general part of the description.

[0054] As far as the preferred thickness of the protective layer 6 in the exemplary embodiments of FIGS. 1 and 2 is concerned, it is recommendable that the thickness of the heat-resistant protective layer 6 is between 20 m and 300 m, preferably between 50 m and 150 m.

[0055] FIG. 3 shows another exemplary embodiment of a vacuum insulation panel according to the invention in which specifically it is provided that the heat-resistant protective layer 6 consists substantially of a material that expands when exposed to heat. In this case, a preferred thickness of the protective film 6 is significantly greater than in the exemplary embodiments of FIGS. 1 and 2, to be specific is 0.5 mm to 5 mm, preferably 2 mm to 3 mm.

[0056] FIG. 4 shows an even more enlarged further special feature of the invention. FIG. 4 schematically shows the section through an enclosure film for vacuum insulation panels with a protective layer 6 of a heat-resistant material on the outside of the barrier layer 3 or on an intermediate layer 4 located on the outside of the barrier layer 3. In FIG. 4, it can be seen for the enclosure 2 that can be processed as a film that there is underneath first of all, as an example, a sealing layer 5 of polyethylene in a thickness of about 50 m, over that the three-ply barrier layer 3, in each case with the combination of a metallization on a PET intermediate layer 4, each ply approximately in the thickness of 15 m, and on that the protective layer 6, applied directly, of mica particles fixed with binder, the protective layer 6 having a thickness of about 50 m. The entire enclosure film from FIG. 4 has a thickness of approximately 150 m and comprises a sequence of layers that conforms to extremely high fire safety regulations. The enclosure film for vacuum insulation panels can then be used directly as enclosure 2 for vacuum insulation panels.

[0057] The exemplary embodiment represented in FIG. 5 shows a variant of the exemplary embodiment represented in FIG. 4. Here, the upper protective layer 6 of heat-resistant material is formed by mica particles 6, which are located directly on the outermost intermediate layer 4 and here are pre-fixed with a binder, and an outer top layer 6 of PET, which covers and fixes these mica particles 6. In FIG. 5, for representational reasons only the upper region of the upper intermediate layer 4 is shown.

LIST OF REFERENCE SIGNS

[0058] 1 Core [0059] 2 Enclosure [0060] 3 Barrier layer [0061] 4 Intermediate layer [0062] 5 Sealing layer [0063] 6 Protective layer [0064] 6 Top layer [0065] 6 Mica particles