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A multi-layer slab insulation having an aluminum layer, a first foam layer positioned on one side of the aluminum layer, and a second foam layer positioned on another side of the aluminum layer. In one embodiment, the first and second foam layers are polyolefin foam layers such as polyethylene foam

A multi-layer slab insulation having an aluminum layer, a first foam layer positioned on one side of the aluminum layer, and a second foam layer positioned on another side of the aluminum layer. In one embodiment, the first and second foam layers are polyolefin foam layers such as polyethylene foam and polypropylene foam. The aluminum layer is an aluminum foil and may be provided with strengthening layers. Alternatively, the aluminum layer is a metallized film. Preferably, the various layers are laminated together. In another embodiment, a multi-layer slab insulation includes a first foam layer, and a second foam layer laminated to the first foam layer, at least one of the foam layers being provided with at least one extending lip sized to allow interlocking of the multi-layer slab insulation with an adjacent multi-layer slab insulation.

대표청구항 ▼

1. A flexible multi-layer slab insulation comprising:an aluminum layer;a first foam layer positioned on one side of said aluminum layer;a second foam layer positioned on another side of said aluminum layer; andat least one strengthening layer positioned between said aluminum layer and at least one o

1. A flexible multi-layer slab insulation comprising:an aluminum layer;a first foam layer positioned on one side of said aluminum layer;a second foam layer positioned on another side of said aluminum layer; andat least one strengthening layer positioned between said aluminum layer and at least one of said first foam layer and said second foam layer;wherein said first foam layer is provided with a first extending lip extending beyond said second foam layer, said first extending lip being a continuous integral extension of said first foam layer having substantially the same thickness as said first foam layer, and being sized to allow interlocking of said multi-layer slab insulation with an adjacent multi-layer slab insulation. 2. The multi-layer slab insulation of claim 1, wherein said first and second foam layers are polyolefin foam layers. 3. The multi-layer slab insulation of claim 2, wherein said polyolefin foam layers have a thickness of 0.25 to 0.5 inch. 4. The multi-layer slab insulation of claim 2, wherein said polyolefin foam layers are made of at least one of polyethylene foam and polypropylene foam. 5. The multi-layer slab insulation of claim 4, wherein said polyolefin foam layers are made of polypropylene low density microcell foam. 6. The multi-layer slab insulation of claim 1, wherein said aluminum layer includes an aluminum foil having a thickness of 0.00025 to 0.0005 inch. 7. The multi-layer slab insulation of claim 6, wherein said aluminum layer is made of at least one of 1100 wettable aluminum and 1145 wettable aluminum. 8. The multi-layer slab insulation of claim 6, wherein said at least one strengthening layer includes a first strengthening layer positioned between said aluminum foil and said first foam layer, and a second strengthening layer positioned between said aluminum foil and said second foam layer. 9. The multi-layer slab insulation of claim 8, wherein said strengthening layers have a thickness of approximately 0.001 inch. 10. The multi-layer slab insulation of claim 8, wherein said strengthening layers are extruded low density polyethylene films. 11. The multi-layer slab insulation of claim 8, wherein said first and second foam layers, first and second strengthening layers, and said aluminum layer are laminated together. 12. The multi-layer slab insulation of claim 11, wherein said first and second foam layers, first and second strengthening layers, and said aluminum layer are laminated together by applying heat to bond said layers together. 13. The multi-layer slab insulation of claim 11, wherein said first and second foam layers, first and second strengthening layers, and said aluminum layer are laminated together by applying an adhesive to bond said layers together. 14. The multi-layer slab insulation of claim 1, wherein said aluminum layer includes a metallized film. 15. The multi-layer slab insulation of claim 14, wherein said metallized film is at least one of a polyolefin film with aluminum coating thereon and a polyester film with aluminum coating thereon. 16. The multi-layer slab insulation of claim 14, wherein said first and second foam layers, and said metallized film are laminated together. 17. The multi-layer slab insulation of claim 1, wherein said second foam layer is provided with a second extending lip that extends beyond said first foam layer, said second extending lip being an integral extension of said second foam layer and being sized to allow interlocking of said multi-layer slab insulation with adjacent multi-layer slab insulation. 18. The multi-layer slab insulation of claim 17, wherein said first foam layer and said second foam layer have substantially the same width, said first foam layer being offset relative to said second foam layer to provide said first extending lip on said first foam layer and said second extending lip on said second foam layer. 19. The multi-layer slab insulation of claim 17, wherein said first extending lip is provided with an adhesive to adhere to an extending lip of an adjacent multi-layer slab insulation. 20. A flexible multi-layer slab insulation comprising:an aluminum layer made of at least one of 1100 wettable aluminum foil and 1145 wettable aluminum foil having a thickness of 0.00025 to 0.0005 inch;a first polyolefin foam layer having a thickness of 0.25 to 0.5 inch positioned on one side of said aluminum layer;a first strengthening layer positioned between said aluminum layer and said first foam layer;a second polyolefin foam layer having a thickness of 0.25 to 0.5 inch positioned on another side of said aluminum layer; anda second strengthening layer positioned between said aluminum layer and said second foam layer;wherein said layers are laminated together, and at least one of said first polyolefin foam layer and second polyolefin foam layer is provided with at least one extending lip sized to allow interlocking of said multi-layer slab insulation with an adjacent multi-layer slab insulation, said at least one extending lip being formed as an integral extension of one of said first polyolefin foam layer and second polyolefin foam layer beyond the other of said polyolefin foam layer, said at least one extending lip having substantially the same thickness as said polyolefin foam layer from which said at least one extending lip extends. 21. The multi-layer slab insulation of claim 20, wherein said first foam layer is offset relative to said second foam layer to provide a first extending lip on said first foam layer and a second extending lip on said second foam layer. 22. The multi-layer slab insulation of claim 20, wherein said second foam layer is larger in width than said first extending lip to provide two extending lips on said second foam layer. 23. The multi-layer slab insulation of claim 20, wherein said at least one extending lip is provided with an adhesive to adhere to an extending lip of an adjacent multi-layer slab insulation. 24. A flexible multi-layer insulation comprising:an aluminum layer;a first foam layer of polyolefin foam positioned on one side of said aluminum layer, said first foam layer having a thickness dimension and a width dimension;a first strengthening layer positioned between said aluminum layer and said first foam layer;a second foam layer positioned on another side of said aluminum layer, said second foam layer having substantially same thickness dimension as said first foam layer and a width dimension; anda second strengthening layer positioned between said aluminum layer and said second foam layer;wherein said second foam layer is larger in width than said first foam layer so that said second foam layer extends beyond said first foam layer to provide two extending lips on said second foam layer to allow interlocking of said multi-layer insulation with an adjacent multi-layer insulation, said extending lips being partially defined by edges of said first foam layer, and being continuous extensions of said second foam layer thereby having substantially the same thickness as said second foam layer. 25. A multi-layer insulation consisting of:an aluminum layer made of at least one of 1100 wettable aluminum foil and 1145 wettable aluminum foil having a thickness of 0.00025 to 0.0005 inch;a first polyolefin foam layer having a thickness of 0.25 to 0.5 inch positioned on one side of said aluminum layer;a first strengthening layer positioned between said aluminum layer and said first foam layer;a second polyolefin foam layer having a thickness of 0.25 to 0.5 inch positioned on another side of said aluminum layer; anda second strengthening layer positioned between said aluminum layer and said second foam layer.