FOIL-WRAPPED VACUUM INSULATION ELEMENT
The invention is directed to a foil-wrapped vacuum insulation element having a core and an air-tight shell surrounding the core. One or more layers of paper, cardboard, and/or paperboard are also provided between the core and the shell, and these layers completely envelop the core, preferably in a powder-tight manner.
1 . A foil-wrapped vacuum insulation element having a core and an air-tight shell surrounding the core, characterized in that one or more layers of paper, cardboard, and/or paperboard are also provided between the core and the shell, and these layers completely envelop the core, preferably in a powder-tight manner.
2 . The foil-wrapped vacuum insulation element according to claim 1 , characterized in that a single layer of paper or cardboard has a grammage of 40 g/m 2 or more, for example 50 g/m 2 or more, preferably 60 g/m 2 or more, in particular 80 g/m 2 or more, or even 100 g/m 2 or more.
3 . The foil-wrapped vacuum insulation element according to claim 1 , characterized in that a single layer of paper or cardboard has a grammage of 250 g/m 2 or less, for example 225 g/m 2 or less, preferably 200 g/m 2 or less, in particular 175 g/m 2 or less, or even 150 g/m 2 or less.
4 . The foil-wrapped vacuum insulation element according to claim 1 , characterized in that multiple, preferably three, layers of paper and/or cardboard are provided.
5 . The foil-wrapped vacuum insulation element according to claim 1 , characterized in that at least one paper layer is joined, preferably glued, to one or two adjoining paper layers to form a single layer.
6 . The foil-wrapped vacuum insulation element according to claim 1 , characterized in that at least one of multiple paper or cardboard layers, preferably an inner paper or cardboard layer, has a corrugated profile.
7 . The foil-wrapped vacuum insulation element according to claim 4 , characterized in that a total of three paper layers, having a grammage in each case of 40 g/m 2 or more, and/or having a grammage in each case of 250 g/m 2 or less, are provided, so that the overall layer made of joined-together layers of paper or cardboard has a total grammage between 120 g/m 2 and 750 g/m 2 , preferably a grammage between 150 g/m 2 and 600 g/m 2 , in particular a grammage between 170 g/m 2 and 500 g/m 2 .
8 . The foil-wrapped vacuum insulation element according to claim 1 , characterized in that the paper is made up of 40% by weight or more of recovered paper, preferably 60% by weight or more of recovered paper, in particular 80% by weight or more of recovered paper.
9 . The foil-wrapped vacuum insulation element according to claim 1 , characterized in that the ply or layer of paper, cardboard, and/or paperboard is formed into an open and/or closable hollow body which has approximately the same shape as the finished vacuum insulation element.
10 . The foil-wrapped vacuum insulation element according to claim 9 , characterized in that the open and/or closable hollow body is produced from a single paper, cardboard, or paperboard blank.
11 . The foil-wrapped vacuum insulation element according to claim 10 , characterized in that the paper blank is folded and/or glued in order to form the open and/or closable hollow body.
12 . The foil-wrapped vacuum insulation element according to claim 9 , characterized in that the open and/or closable hollow body is a paper bag ( 1 ) or a paperboard box ( 11 ).
13 . The foil-wrapped vacuum insulation element according to claim 12 , characterized in that the paper bag ( 1 ) or the paperboard box ( 11 ) has at least one filling opening which is closed after the core material is filled in.
14 . The foil-wrapped vacuum insulation element according to claim 13 , characterized in that the filling opening of the paper bag ( 1 ) is closed, for example glued, by means of an attached tab after the core material is filled in.
15 . The foil-wrapped vacuum insulation element according to claim 14 , characterized in that the tab in the closed state covers an end face of a panel-shaped vacuum insulation element.
16 . The foil-wrapped vacuum insulation element according to claim 13 , characterized in that the filling opening of the paperboard box ( 11 ) is closed by means of a lid ( 20 ) after the core material is filled in, for example by placing a loose lid on top or folding shut a lid ( 20 ) which hangs on a body ( 17 ) on one side.
17 . The foil-wrapped vacuum insulation element according to claim 16 , characterized in that the lid ( 20 ) in the closed state covers a base surface or main surface of a panel-shaped vacuum insulation element.
18 . The foil-wrapped vacuum insulation element according to claim 12 , characterized in that the paper bag ( 1 ) or the paperboard box ( 11 ) has at least one ventilation opening which allows the contained air to escape when the core material is filled in and/or when the paper bag ( 1 ) or the paperboard box ( 11 ) is compressed or evacuated.
19 . The foil-wrapped vacuum insulation element according to claim 18 , characterized in that a ventilation opening is formed by one or more perforations, in particular one or more needlings.
20 . The foil-wrapped vacuum insulation element according to claim 12 , characterized in that the paper bag ( 1 ) or the paperboard box ( 11 ) has at least one valve or at least one valve area.
21 . The foil-wrapped vacuum insulation element according to claim 20 , characterized in that in the area of a valve, perforations or needlings are provided in all paper layers, but are offset with respect to one another.
22 . The foil-wrapped vacuum insulation element according to claim 1 , characterized in that the core material is made of and/or pressed from porous powder and/or a fibrous material.
23 . The foil-wrapped vacuum insulation element according to claim 1 , characterized in that the shell includes a metal foil, in particular an aluminum foil, and/or a metallized foil, in particular a high-barrier foil.