MXPA98007669A - Vacuum insulation panel coated to bottles with a composite sheet with metal content or a metal cover layer - Google Patents
Vacuum insulation panel coated to bottles with a composite sheet with metal content or a metal cover layerInfo
- Publication number
- MXPA98007669A MXPA98007669A MXPA/A/1998/007669A MX9807669A MXPA98007669A MX PA98007669 A MXPA98007669 A MX PA98007669A MX 9807669 A MX9807669 A MX 9807669A MX PA98007669 A MXPA98007669 A MX PA98007669A
- Authority
- MX
- Mexico
- Prior art keywords
- vacuum insulation
- composite sheet
- insulation panel
- layer
- panel according
- Prior art date
Links
- 238000009413 insulation Methods 0.000 title claims abstract description 25
- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 17
- 239000002184 metal Substances 0.000 title claims abstract description 17
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 16
- 239000006260 foam Substances 0.000 claims description 12
- 239000004814 polyurethane Substances 0.000 claims description 11
- 229920002635 polyurethane Polymers 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 8
- -1 polypropylene Polymers 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229920000728 polyester Polymers 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 239000000741 silica gel Substances 0.000 claims description 2
- 229910002027 silica gel Inorganic materials 0.000 claims description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N Silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims 1
- 239000011810 insulating material Substances 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- 229920001228 Polyisocyanate Polymers 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000005056 polyisocyanate Substances 0.000 description 5
- 239000004698 Polyethylene (PE) Substances 0.000 description 3
- 229920005830 Polyurethane Foam Polymers 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 239000011496 polyurethane foam Substances 0.000 description 3
- 239000000945 filler Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229920000265 Polyparaphenylene Polymers 0.000 description 1
- 229920002396 Polyurea Polymers 0.000 description 1
- MAJYSQJXMUDACI-UHFFFAOYSA-N [N-]=C=O.[N-]=C=O.C=1C=CC=CC=1CC1=CC=CC=C1 Chemical class [N-]=C=O.[N-]=C=O.C=1C=CC=CC=1CC1=CC=CC=C1 MAJYSQJXMUDACI-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000007530 organic bases Chemical class 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N silicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
A vacuum insulation panel consisting of a substrate coated on both sides with a composite sheet with metal content or a metal cover layer, of rectangular dimensions with a respective edge length of at least 40 is described.
Description
Vacuum insulation panel coated on both sides with a composite sheet with metal content or a metal cover layer
Vacuum insulation panels are commonly used for thermal insulation. Vacuum insulation panels are known composed of a precompressed porous layer, a porous pressed plate or a hard foam of open cells as a substrate, which is covered by a sheet impervious to gases, where after vacuuming the sheet is welded or hit
Such vacuum insulation panels are also already used for the manufacture of refrigerated enclosures, eg refrigerators, these being inserted between an external and an internal casing and the intermediate space remaining between the external and internal casings is filled with foam. Silica precipitated and dried acids, silica gels, fly ash, open cell foams of organic base, such as open cell polyurethane sprays or agglomerated polyurethane hard foam powder, are used as the filler. which are described, for example, in DE 4 439 331 and DE 4 439 328. For the covering sheets, asymmetrical structure is generally chosen, a REF.28229 being formed on the side by a sheet made of waterproof aluminum to the diffusion and the other side by a plastic sheet composed of several layers. The use of composite sheets containing aluminum on both sides is not done so far to prevent the flow of heat through the sealing seam. Surprisingly, it has been found that the contribution to the conduction of heat through the edge in a coating on both sides with a composite sheet with metallic content or a metal cover layer is then negligible if vacuum insulation panels are used in sizes of rectangular plates with a length of edges of at least 40 cm of respective edge lengths. The object of the present invention is therefore vacuum insulation panels constituted by an open cell substrate coated on all sides with a composite sheet with metallic content or metal cover layer and a length of edges of at least 40 cm in length of edges respective. A pre-compressed layer of precipitated silica, silica gel and / or hard polyurethane foam powder is suitable as the substrate, and compression can be carried out in the presence of suitable adhesive agents to guarantee self-stability. In addition, open-pored polyurethane hard foam plates are suitable as substrates. Preferably, open-pored polyurethane hard foam plates or hard-pressed polyurethane foam plates, precompressed and optionally sized, are used as the substrate. The vacuum insulation panels according to the invention have a edge length of at least 40 cm, preferably a edge length of 45 cm × 65 cm.
The thickness of the plates according to the invention is usually in the range of 0.5 to 5 cm. By measurements it has been determined that composite sheets with metal content or metal cover layers affect the thermal conductivity of the vacuum insulation panels coated therewith. Preferably, flexible composite sheets composed of at least two layers are used. Particular preference is given to using aluminum-containing composite sheets with aluminum layers of thickness from 5 to 25 μm, preferably from 9 to 15 μm. Examples of possible compositions are: Polyethylene / aluminum / polyester Polyethylene / aluminum / polyethylene / polyester Polypropylene / aluminum / polyester There is also the possibility of selecting the coating in such a way that composite sheets are used in different ways on the front and back of the sheet. panel. Thus, the composite sheet on one side may contain, for example, an aluminum layer 9 μm thick and the other 20 μm thick. Preferably, sheet steel plates are used as cover layers, with special preference stainless steel plates. Such composite sheets with metal content or metal cover layers are already known and can be obtained commercially. The vacuum insulation panels according to the invention are manufactured by coating the substrate with the composite sheet with gas-impermeable metal content and after vacuuming by welding or gluing the sheet in a manner known per se or by coating the substrate with the layer of metallic cover on both sides, practicing vacuum and sealing hermetically. The vacuum insulation panels according to the invention are used for the insulation of the walls of refrigerated enclosures or refrigeration units, such as, refrigerators and refrigerated cabinets. The invention is illustrated below by the attached Figure. The Figure shows the cross section through a vacuum insulation panel according to the invention, composed of an open pore filler material 1 (eg hard polyurethane foam powder compressed with polyisocyanate as a substrate) as well as a composite sheet with metallic content or metal cover layer 2. The following Examples will now illustrate the invention in more detail, without however limiting its scope. Examples Example 1 They were mixed homogeneously with a skirt mixer and plow grate with 2 nozzles for the substances
580 g of a PUR hard foam powder from a cold storage recycling plant with 20 g of water and
58 g of a mixture of polyisoacyanates of diphenylmethane diisocyanates and polyphenylene polymethylene polyisocyanates (Desmodur VP.PU 1520 A 20, Bayer AG). With this mixture, a molded part was formed in a mold, compacted homogeneously and then pressed to a thickness of 20 mm in a laboratory press with a pressure of 5 bar and a temperature of 120 ° C for 8 minutes using a timed program . A porous 20 mm plate with an apparent density of 200 kg / m3 was thus obtained. The plate was heated for approx. 2 h at 120 ° C to release all volatile components. The plate was covered on both sides with steel sheet plates, vacuum was applied and sealed. Example 2 Rectangular molding body from polyurethane hard foam powder pressed with polyisocyanate (manufacture according to Example 1). Dimensions: 40 x 40 x 2 cm3 Coefficient of thermal conductivity at 0.6 mbar: 8.3 mW / mK Example 3 Vacuum insulation panel consisting of a rectangular molding body made of polyurethane hard foam powder pressed with polyisocyanate
(manufacture according to Example 1) and coated on all sides with aluminum composite sheet containing an aluminum layer of 12 μm: internal pressure: approx. 0.6 mbar. Dimensions: 40 x 40 x 2 cm3 Coefficient of thermal conductivity: 8.3 mW / mK Example 4 (Comparative) Vacuum insulation panel consisting of a rectangular molding body made of polyurethane hard foam powder pressed with polyisocyanate ( manufacture according to Example 1) and coated on all sides with aluminum composite sheet containing an aluminum layer of 12 μm: internal pressure: approx. 0.6 mbar.
Dimensions: 25 x 25 x 2 cm3 Coefficient of thermal conductivity: 9 mW / mK Examples 2 and 4 show that from the dimensions according to the invention of the vacuum panel the composite sheet with aluminum content, used for the coating, does not affect the thermal conductivity of the vacuum insulation panel obtained.
It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is the conventional one for the manufacture of the objects or products to which it refers. Having described the invention as above, property is claimed as contained in the following:
Claims (8)
- Claims 1. Psrel of isola-màrto of vacuum cacacrsriza-üo pa-que this o - ns1 ± tuido per u substrate covered on both sides with a composite sheet with metallic content or a layer of metal cover, rectangular dimensions with a respective edge length of at least 40 cm.
- 2. Vacuum insulation panel according to claim 1, characterized in that it has a length of edges of 45 x 65 cm.
- 3. Vacuum insulation panel according to one of claims 1 to 2, characterized in that the metal-containing composite sheet contains an aluminum layer with a thickness in the range of 5 to 25 μm.
- 4. Vacuum insulation panel according to one of claims 1 to 3, characterized in that it has an asymmetric structure such that on one side of the panel the composite sheet with metallic content contains an aluminum layer with a thickness of 5-10 μm and for the On the other side of the panel, the composite sheet with metallic content contains an aluminum layer with a thickness of 10-25 μm.
- 5, Vacuum insulation panel according to one of claims 1 to 4, characterized in that the composite sheet contains at least one layer of polyester or polypropylene.
- 6. Vacuum insulation panel according to one of claims 1 to 2, characterized in that the metal cover layer is a sheet steel plate.
- 7. Vacuum insulation panel according to one of claims 1 to 6, characterized in that the substrate is a precompressed layer of precipitated and dried silicic acid, silica gel and / or agglomerated polyurethane hard foam powder or a plate of open cell polyurethane hard foam.
- 8. The use of vacuum insulation panels according to one of claims 1 to 7 as insulating material for walls of refrigerated enclosures or refrigerated cabinets.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29605338.4 | 1996-03-22 | ||
| DE29608385.2 | 1996-05-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MXPA98007669A true MXPA98007669A (en) | 1999-04-27 |
Family
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