CA2249537A1 - Vacuum insulating panel coated on both sides with a metal-containing composite foil or a metal covering layer - Google Patents

Vacuum insulating panel coated on both sides with a metal-containing composite foil or a metal covering layer

Info

Publication number
CA2249537A1
CA2249537A1 CA 2249537 CA2249537A CA2249537A1 CA 2249537 A1 CA2249537 A1 CA 2249537A1 CA 2249537 CA2249537 CA 2249537 CA 2249537 A CA2249537 A CA 2249537A CA 2249537 A1 CA2249537 A1 CA 2249537A1
Authority
CA
Grant status
Application
Patent type
Prior art keywords
metal
vacuum insulation
characterised
containing composite
composite film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA 2249537
Other languages
French (fr)
Inventor
Karl Werner Dietrich
Torsten Heinemann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayer AG
Original Assignee
Bayer Aktiengesellschaft
Karl Werner Dietrich
Torsten Heinemann
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00Thermal insulation in general
    • F16L59/06Arrangements using an air layer or vacuum
    • F16L59/065Arrangements using an air layer or vacuum using vacuum

Abstract

The description relates to a vacuum insulating panel consisting of a rectangular substrate with an edge length of at least 40 cm, coated on both sides with a metal-containing composite foil or a metal covering layer.

Description

. CA 02249~37 1998-09-17 Le A 31 669-Forei~n Pt/vos/S-P

Vacuum insulation panel covered on both sides with metal-containin~ composite film or a metallic outer layer Vacuum insulation panels are conventionally used for thermal insulation. Known 5 vacuum insulation panels comprise a pre-colllpressed porous fill, a porous pressed board or an open-cell rigid foam as the substrate which, after evacuation, is covered with a gas-tight film, wherein the film is welded or bonded.

Such vacuum insulation panels are also already used in the production of 10 refrigerating chambers, for example refrigerators, being inserted between the outer and inner housing, and the rem~ining space between the outer and inner housing being foam-filled.

Examples of filling materials are precipitated, dried silicas, silica gels, fly ash, 15 org~ni~lly based open-cell foams such as open-cell rigid polyurethane foams or bonded, ground rigid polyurethane foam, such as are described, for example, in DE
4 439 331 and DE 4 439 328.

An asymmetrical structure is generally selected for the covering films, wherein one 20 side comprises diffusion-tight aluminium composite film and the other side is a multi-layer composite of plastics film.

Aluminium-containing composite films have not hitherto been used on both sides, so as to avoid heat flow by way of the sealing seam.
It has surprisingly been found that when metal-containing composite film or a metallic outer layer covers both sides, the contribution to heat conduction by way of the rim is negligible if vacuum insulation panels are used in a rectangular board size having an edge length of in each case at least 40 cm.

CA 02249~37 1998-09-17 Le A 31 669 The present invention therefore provides vacuum insulation panels which comprisean open-cell substrate covered on all sides with metal-cont~ining composite filmor a metallic outer layer and exhibit an edge length of in each case at least 40 cm.

5 An optionally pre-press-moulded fill of precipitated silica, silica gel and/orpowdered rigid polyurethane foam is a suitable substrate, wherein the press-moulding may take place in the presence of adhesives suitable for çncl-ring inherent stability. Boards of open-pore rigid polyurethane foam are further suitable as a substrate.
Boards of open-pore rigid polyurethane foam or boards of pre-press-moulded, optionally bonded, ground rigid polyurethane foam are preferably used as the substrate.

15 The vacuum insulation panels according to the invention have an edge length of at least 40 cm, preferably an edge length of 45 cm x 65 cm. The thickness of theboards according to the invention is normally within the range 0.5 to 5 cm.

Measurements have shown that metal-cont~ining composite films or metallic outer 20 layers do not influence the thermal conductivity of the vacuum insulation panels which they cover.

Flexible composite films comprising at least two layers are preferably used.

25 Aluminium-cont~inin~ composite films having aluminium layers from S to 25 ~m thick, preferably 9 to lS llm thick, are particularly preferably used.

Examples of possible compositions are:

30 polyethylene/aluminium/polyester polyethylene/aluminium/polyethylene/polyester polypropylene/aluminium/polyester.

CA 02249~37 1998-09-17 Le A 31 669 It is also possible to select the covering such that differently constructed composite films are used on the front and back sides of the panel. Thus, the composite film of one side may contain, for example, a 9 ~lm-thick aluminium layer and the other a 20 llm-thick aluminium layer.
s Plates of sheet steel are preferably used as the metallic outer layers, particularly preferably plates of sheet special steel.

Such metal-cont~ining composite films or metallic outer layers are already known10 and are available commercially.

The vacuum insulation panels according to the invention are produced by coveringthe substrate on both sides with the gas-tight metal-cont~ining composite film, followed, after evacuation, by welding or bonding the film in a manner which is 15 known per se, or by covering the substrate on both sides with the metallic outer layer, and evacuating and hermetically sealing it.

The vacuum insulation panels according to the invention are used for in~ ting the walls of refrigerating chambers or refrigeration appliances such as, for example, 20 refrigerators and freezers.

The invention is explained below with the aid of the attached Figure.

The Figure shows a cross section through a vacuum insulation panel according to 25 the invention, which comprises open-pore filling material 1 (for example ground rigid polyurethane foam press-moulded with polyisocyanate, as the substrate) anda metal-cont~ining composite film or a metallic outer layer 2.

It is the intention in the Examples below to explain the invention in greater 30 detail without, however, restricting the scope thereof.

CA 02249~37 1998-09-17 Le A 31 669 Examples Example 1 580 g of a ground rigid PUR foam from a refrigeration unit recycling plant are mixed uniformly with 20 g water and 58 g of a polyisocyanate mixture compri~ing diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates (Desmodur VP.PU 1520 A 20, from Bayer AG) using a Lodige plough-blade mixer having 2 nozzles. In a moulding frame a moulding is formed from this mixture and compressed uniformly; it is then pressed to 20 mm in a laboratory press at a pressure of S bar and a temperature of 120~C for 8 minutes with use of a time-measurement program.

A porous 20 mm board is obtained having a gross density of 200 kg/m3. The board is heated to 120~C for approximately 2 hours in order to remove all volatile constituents.

The board is covered on both sides with a plate of sheet steel, evacuated and hermetically sealed.
Example 2 A rectangular moulded body produced from ground rigid polyurethane foam press-moulded with polyisocyanate (method as in Example 1).
Size 40 x 40 x 2 cm3 Thermal conductivity at 0.6 mbar: 8.3 mW/mK

Example 3 Vacuum insulation panel comprising a rectangular moulded body produced from ground rigid polyurethane foam press-moulded with polyisocyanate (method as in Example 1) and covered on all sides with aluminium composite film cont~qining a CA 02249~37 1998-09-17 Le A 31 669 12 ~m-thick aluminium layer; intern~l pressure: approximately 0.6 mbar.
Size: 40 x 40 x 2 cm3 Thermal conductivity: 8.3 mW/mK

5 Example 4 (Colllpaldlive) Vacuum insulation panel comprising a rectangular moulded body produced from ground rigid polyurethane foam press-moulded with polyisocyanate (method as in Example 1) and covered on all sides with aluminium composite film cont~inin~ a 10 12 llm-thick aluminium layer; internal pressure: approximately 0.6 mbar.
Size: 25 x 25 x 2 cm3 Thermal conductivity: 9 mW/mK

Examples 2 to 4 show that, at upwards of the vacuum panel size according to the 15 invention, the aluminium-cont~ining composite film used for covering does notinfluence the thermal conductivity of the vacuum insulation panel obtained.

Claims (8)

1. Vacuum insulation panel comprising a substrate covered on both sides with metal-containing composite film or a metallic outer layer in a rectangular size having an edge length of in each case at least 40 cm.
2. Vacuum insulation panel according to Claim 1, characterised in that the edge length thereof is 45 x 65 cm.
3. Vacuum insulation panel according to one of Claims 1 or 2, characterised in that the metal-containing composite film contains an aluminium layer having a thickness within the range 5 to 25 µm.
4. Vacuum insulation panel according to one of Claims 1 to 3, characterised in that it exhibits an asymmetrical structure such that on one side of the panel the metal-containing composite film contains a 5 to 10 µm-thick aluminium layer, and on the other side of the panel the metal-containing composite film contains a 10 to 25 µm-thick aluminium layer.
5. Vacuum insulation panel according to one of Claims 1 to 4, characterised in that the composite film contains at least one polyethylene, polyester or polypropylene layer.
6. Vacuum insulation panel according to one of Claims 1 or 2, characterised in that the metallic outer layer is a plate of sheet steel.
7. Vacuum insulation panel according to one of Claims 1 to 6, characterised in that the substrate is an optionally pre-press-moulded fill comprising precipitated, dried silica, silica gel and/or bonded ground rigid polyurethane foam or an open-cell rigid polyurethane foam board.
8. Use of vacuum insulation panels according to one of Claims 1 to 7 as an insulation material for walls of refrigerating chambers or refrigeration appliances.
CA 2249537 1996-03-22 1997-03-10 Vacuum insulating panel coated on both sides with a metal-containing composite foil or a metal covering layer Abandoned CA2249537A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE1996205338 DE29605338U1 (en) 1996-03-22 1996-03-22 Both sides with aluminum-laminated film wrapped Vakuumisolierpanell
DE29605338.4 1996-03-22
DE29608385.2 1996-05-09
DE1996208385 DE29608385U1 (en) 1996-05-09 1996-05-09 Vakuumisolierpanell

Publications (1)

Publication Number Publication Date
CA2249537A1 true true CA2249537A1 (en) 1997-10-02

Family

ID=26058771

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2249537 Abandoned CA2249537A1 (en) 1996-03-22 1997-03-10 Vacuum insulating panel coated on both sides with a metal-containing composite foil or a metal covering layer

Country Status (6)

Country Link
EP (1) EP0888512A1 (en)
JP (1) JP2000507340A (en)
KR (1) KR20000004917A (en)
CA (1) CA2249537A1 (en)
DE (1) DE19780241D2 (en)
WO (1) WO1997036129A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2472291T3 (en) 2006-06-22 2014-06-30 Basf Se Thermal insulation elements
RU2013144410A (en) * 2011-03-04 2015-04-10 Басф Се composite elements

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0184415B1 (en) * 1984-12-04 1990-12-05 Nippon Sanso Kabushiki Kaisha Evacuated heat insulation unit
US5018328A (en) * 1989-12-18 1991-05-28 Whirlpool Corporation Multi-compartment vacuum insulation panels
DE4019870A1 (en) * 1990-06-22 1992-01-09 Degussa Vacuum insulation panel with asymmetrical construction
US5330816A (en) * 1992-12-23 1994-07-19 Owens-Corning Fiberglas Technology Inc. High R super insulation panel

Also Published As

Publication number Publication date Type
JP2000507340A (en) 2000-06-13 application
WO1997036129A1 (en) 1997-10-02 application
KR20000004917A (en) 2000-01-25 application
EP0888512A1 (en) 1999-01-07 application
DE19780241D2 (en) 1999-06-17 grant

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Legal Events

Date Code Title Description
EEER Examination request
FZDE Dead