Vacuum insulation panel and container comprising vacuum insulation panels
A vacuum insulation panel comprises a planar core having an open-pored material and an enclosure that surrounds the core on all sides in a close-fitting, complete and gas-tight manner. The enclosure has at least the following layers, listed in order from the inner layer next to the core to the outer layer: a sealing layer of polyethylene; a barrier layer assembly arranged thereon, the assembly comprising at least one metallized polyester film, EVOH film, metallized EVOH film, metallized PP film, or plastic film coated with alumina or silicon oxide; and at least one paper layer arranged on said assembly.
1. A vacuum insulation panel comprising
a planar core made of an open-pored material and an enclosure that surrounds the core on all sides in a close-fitting, complete and gas-tight manner,
wherein the enclosure, listed in order from the inside at the core toward the outside, has at least the following layers:
a sealing layer made of polyethylene, covered by a barrier layer assembly having at least one metalized polyester film, EVOH film, metalized EVOH film, metalized PP film, or plastic film coated with alumina or with silicon oxide, and at least one paper layer covering the barrier layer assembly.
2. The vacuum insulation panel as claimed in claim 1 , wherein
the enclosure comprises two planar enclosure parts, each having a sealing layer, the enclosure parts being laid on each other with the sealing layers running around a peripheral edge and being secured to each other in a gas-tight sealed connection.
3. The vacuum insulation panel as claimed in claim 1 , wherein the enclosure comprises a single planar enclosure part which is connected in a gas-tight manner at one end to a first sealing seam running over a main surface or parallel to a main surface and is closed in a gas-tight manner at upper and lower sealing seams respectively running substantially transversely with respect to the first sealing seam.
4. The vacuum insulation panel as claimed in claim 1 , wherein the at least one paper layer is configured to provide stiffness to the enclosure.
5. The vacuum insulation panel as claimed in claim 1 , wherein the enclosure has a thickness in the range of 200 μm to 500 μm.
6. The vacuum insulation panel as claimed in claim 1 , wherein the enclosure is coated with a fire-retardant material.
7. The vacuum insulation panel as claimed in claim 1 , wherein at least one plastic outer layer or film is provided over the paper layer.
8. The vacuum insulation panel as claimed in claim 7 , wherein the plastic outer layer or film consists of polyethylene.
9. The vacuum insulation panel as claimed in claim 7 , wherein the plastic outer layer is configured as a coating of the paper layer.
10. The vacuum insulation panel as claimed in claim 1 , wherein the paper layer has a grammage of 100 to 500 g/m 2 .
11. The vacuum insulation panel as claimed in claim 10 , wherein the grammage is 200-300 g/m 2 .
12. The vacuum insulation panel as claimed in claim 1 , wherein
the core and the enclosure have two mutually opposite, main surfaces and circumferential surfaces running between the main surfaces, and
the paper layer is provided at least on one of the main surfaces.
13. The vacuum insulation panel as claimed in claim 12 , wherein the main surfaces are parallel, and the paper layer is provided on at least one of both main surfaces and on the circumferential surfaces.
14. The vacuum insulation panel as claimed in claim 12 , wherein the paper layer is provided on both main surfaces, the paper layer on one of the main surfaces extending between opposite edges thereof and the paper layer on the other of the main surfaces extending beyond opposite edges thereof.
15. The vacuum insulation panel as claimed in claim 1 , wherein
the enclosure has an intermediate layer between the barrier layer assembly and the paper layer.
16. The vacuum insulation panel as claimed in claim 15 , wherein the intermediate layer is configured as at least one of a polyolefin intermediate layer and an adhesive layer.
17. The vacuum insulation panel as claimed in claim 1 , wherein
the enclosure is provided with pre-impressed formations, in locations provided with the paper layer in the enclosure.
18. The vacuum insulation panel as claimed in claim 17 , wherein the pre-impressed formations are provided at fold lines formed in the paper layer.
19. The vacuum insulation panel as claimed in claim 17 , wherein the pre-impressed formations are configured as depressions or embossing.
20. A container comprising
a base, side walls and a cover, with at least one of the cover being openable as a lid or a side wall being openable as a door, wherein
at least one of the base, the side walls, and the cover comprises one or more vacuum insulation panels wherein each vacuum insulation panel comprises
a planar core made of an open-pored material and an enclosure that surrounds the core on all sides in a close-fitting, complete and gas-tight manner,
wherein the enclosure, listed in order from the inside at the core toward the outside, has at least the following layers:
a sealing layer made of polyethylene, covered by a barrier layer assembly having at least one metalized polyester film, EVOH film, metalized EVOH film, metalized PP film, or plastic film coated with alumina or with silicon oxide, and at least one paper layer covering the barrier layer assembly, and
wherein the one or more vacuum insulation panels are configured as load-bearing elements.