EP0164006A1 - Enveloped heat-insulating member - Google Patents

Enveloped heat-insulating member Download PDF

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Publication number
EP0164006A1
EP0164006A1 EP19850106109 EP85106109A EP0164006A1 EP 0164006 A1 EP0164006 A1 EP 0164006A1 EP 19850106109 EP19850106109 EP 19850106109 EP 85106109 A EP85106109 A EP 85106109A EP 0164006 A1 EP0164006 A1 EP 0164006A1
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EP
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Prior art keywords
thermal insulation
microporous
molded
mbar
layer
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EP19850106109
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German (de)
French (fr)
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EP0164006B1 (en
Inventor
Günter Dr. Dipl.-Chem. Kratel
Günter Dr. Dipl.-Chem. Stohr
Franz Dipl.-Ing. Schreiner (Fh)
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Wacker Chemie AG
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Wacker Chemie AG
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B1/78—Heat insulating elements
    • E04B1/80—Heat insulating elements slab-shaped
    • E04B1/806—Heat insulating elements slab-shaped with air or gas pockets included in the slab
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23—Sheet including cover or casing
    • Y10T428/231—Filled with gas other than air; or under vacuum
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23—Sheet including cover or casing
    • Y10T428/239—Complete cover or casing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249978—Voids specified as micro
    • Y10T428/24998—Composite has more than two layers

Definitions

  • the invention relates to thermal insulation boards based on pressed, microporous thermal insulation material with a covering.
  • thermal insulation bodies based on pressed, microporous thermal insulation material are known for example according to DE-OS 30 33 515. It is also known to partially or completely moldings of this type with envelopes, for. B. with glass fiber fabrics, aluminum foil or other lamination material.
  • Such thermal insulation molded articles are distinguished, in particular in the range of higher temperatures, in particular in the temperature range from approximately 200 ° C. to 1,000 ° C., by excellent insulating properties. In the temperature range between approximately -50 ° C to 200 ° C, however, their insulating properties are similar to other insulating materials that are less efficient or unsuitable in the higher temperature range.
  • microporous insulation material are required if insulation is to be designed in such a way that, in the case of insulation against high temperatures, the cold side of the insulation layer only has temperatures in the range from approximately -10 ° C. to 40 ° C.
  • the object of the invention was to improve the insulating effect of molded thermal bodies based on compressed, microporous thermal insulation material in the temperature range from about -50 ° C to 200 ° C.
  • the insulating effect of moldings based on compressed, microporous material can be improved by evacuating the moldings.
  • these moldings can be filled with gases such as krypton, xenon, sulfur hexafluoride or carbon dioxide.
  • gases such as krypton, xenon, sulfur hexafluoride or carbon dioxide.
  • the invention relates to thermal insulation boards based on pressed; Microporous thermal insulation material with a sheath, which are characterized in that the partial pressure of air inside the sheathed thermal insulation boards is less than 20 mbar.
  • the thermal insulation boards according to the invention can have a content of krypton, xenon, sulfur hexafluoride or carbon dioxide.
  • the partial pressure on the gases mentioned can be 0-1000 mbar, in particular 0-400 mbar.
  • the proportion of binder is preferably 0.3 to 1.5% by weight.
  • finely divided metal oxide examples include pyrogenic silicas, including arcing silicas, low-alkali precipitated silicas; Aluminum oxide, titanium dioxide and zirconium dioxide produced analogously.
  • the finely divided metal oxides have specific surfaces of 50-700 m2 / g, preferably 70-400 m2 / g.
  • Ilmenite, titanium dioxide, silicon carbide, iron-II-iron-III mixed oxide, chromium dioxide, zirconium oxide, manganese dioxide and iron oxide are suitable as opacifiers.
  • the opacifiers advantageously have an absorption maximum in the infrared range between 1.5 and 10 pm.
  • fiber material examples include glass wool, rock wool, slag wool, ceramic fibers such as those obtained from melts of aluminum oxide and / or silicon oxide, asbestos fibers and others.
  • the inorganic binders used are, for example, the borides of aluminum, titanium, zirconium, calcium, silicides such as calcium silicide and calcium aluminum silicide, in particular by boron carbide.
  • silicides such as calcium silicide and calcium aluminum silicide, in particular by boron carbide.
  • further constituents are basic oxides, in particular magnesium oxide, calcium oxide or barium oxide.
  • thermal insulation boards according to the invention mostly have a flat shape. In special cases, however, they can also take the form of circular segments and the like. Beveled edges, folds and the like may be mentioned as further shaping elements.
  • the thermal insulation boards based on microporous material are provided with gas-tight envelopes. Relatively low demands are to be made of the compressive strength of these envelopes, since they are in direct contact with the molded body and are thus supported in such a way that the pressure of the surrounding atmosphere is absorbed
  • wrapping material examples include composite films with a layer sequence of thermoplastic material / metal foil / thermoplastic material.
  • a composite film consists of a layer sequence of polypropylene / aluminum film / polyester.
  • Other examples are composite foils with a layer sequence of polyfluorocarbon / polyimide, which may also have a layer of aluminum foil.
  • the covering preferably consists of two separate layers, a first layer which consists of a thermoplastic material, such as polyethylene, and a second layer which can consist of one of the aforementioned composite films.
  • Glass plates serve as a covering, which are connected by gas-tight sealing compounds.
  • sealing compounds are polymers and copolymers of hexafluoropropylene, vinylidene fluoride and the like.
  • the gases enclosed in the bed should be able to escape during pre-compression or compression. Therefore, the compression and compression is preferably carried out with the application of negative pressure. Degassing can also take place before compression or compression.
  • the prefabricated molded body is then provided with a covering and finally evacuated until the partial pressure in air no longer exceeds 20 mbar. Typically, evacuation is carried out until the partial pressure in air is 20 mbar to 10 -4 mbar. If desired, the evacuated system can then be filled with gases such as krypton, xenon, sulfur hexafluoride, carbon dioxide or mixtures thereof. Finally, the covering is sealed airtight. Such sealing is carried out, for example, by welding the composite films described above.
  • thermal insulation boards according to the invention are used in particular for insulation in the temperature range from -50 ° C. to 200 ° C. They are used, for example, as insulation in cold store equipment. Another application opens up as an additional element for thermal insulation
  • the non-evacuated thermal insulation layer is designed so that a heat gradient arises to a temperature of about 100 ° C to 200 ° C and, in conjunction with this, the evacuated thermal insulation board according to the invention a heat gradient overall to a temperature which is in the range of the ambient temperature lies, secures.
  • thermal insulation boards according to the invention By using the thermal insulation boards according to the invention, high-performance insulation arrangements are available whose layer thicknesses are significantly reduced compared to conventional insulation arrangements with a comparable insulation effect.
  • the thermal insulation panels according to the invention are assembled in the same way as the assembly of conventional thermal insulation panels.
  • the plate was coated with a 100 ⁇ m thick composite film (polypropylene / aluminum / polyester) and evacuated to a residual pressure of 20 mbar.
  • the thermal conductivity number 1 of the plate was 100 ° C

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Thermal Insulation (AREA)
  • Laminated Bodies (AREA)

Abstract

A molded thermal insulation body having a microporous thermal insulation material encased in a sheathing. The molded body is partially evacuated to a partial air pressure of 20 mbar or less. Following the evacuation of air, the molded body may be filled with krypton, xenon, sulfur hexafluoride, carbon dioxide or a combination thereof. A process for the manufacture of the molded thermal insulation body is also provided.

Description

Die Erfindung betrifft Wärmedämmplatten auf Basis von verpreßtem, mikroporösem Wärmedämmstoff mit Umhüllung.The invention relates to thermal insulation boards based on pressed, microporous thermal insulation material with a covering.

Wärmedämmformkörper auf Basis von verpreßtem, mikroporösem Wärmedämmstoff sind beispielsweise gemäß DE-OS 30 33 515 bekannt. Es ist weiterhin bekannt, derartige Formkörper teilweise oder vollständig mit Umhüllungen, z. B. mit Glasfasergeweben, Alufolien oder anderem Kaschierungsmaterial, zu versehen. Derartige Wärmedämmformkörper zeichnen sich vor allem im Bereich höherer Temperaturen, insbesondere im Temperaturbereich von etwa 200°C bis 1.000°C durch ausgezeichnete Isoliereigenschaften aus. Im Temperaturbereich zwischen etwa -50°C bis 200°C gleichen sich ihre Isoliereigensohaften allerdings anderen, im Bereich höherer Temperaturen weniger leistungsfähigen oder ungeeigneten Isolierstoffen an.Molded thermal insulation bodies based on pressed, microporous thermal insulation material are known for example according to DE-OS 30 33 515. It is also known to partially or completely moldings of this type with envelopes, for. B. with glass fiber fabrics, aluminum foil or other lamination material. Such thermal insulation molded articles are distinguished, in particular in the range of higher temperatures, in particular in the temperature range from approximately 200 ° C. to 1,000 ° C., by excellent insulating properties. In the temperature range between approximately -50 ° C to 200 ° C, however, their insulating properties are similar to other insulating materials that are less efficient or unsuitable in the higher temperature range.

Entsprechend werden große Schichtdicken an mikroporösem Isoliermaterial erforderlich, wenn eine Isolierung so ausgelegt werden soll, daß bei Isolierung gegen hohe Temperaturen die kalte Seite der Isolierschicht nur noch Temperaturen im Bereich von etwa -10°C bis 40°C aufweist.Correspondingly, large layer thicknesses of microporous insulation material are required if insulation is to be designed in such a way that, in the case of insulation against high temperatures, the cold side of the insulation layer only has temperatures in the range from approximately -10 ° C. to 40 ° C.

Nun sind bereits Messungen bekannt geworden, nach denen die Isolierwirkung von evakuierten Schüttungen mikroporösen Materials oder die Isolierwirkung von Schüttungen mikroporösem Materials, die beispielsweise mit Xenon erfüllt sind, eine gegenüber mit Luft erfüllten Schüttungen verbesserte Isolierwirkung aufweisen.Measurements have now become known according to which the insulating effect of evacuated beds of microporous material or the insulating effect of beds microporous material, which are filled with xenon, for example, have an improved insulating effect compared to fillings filled with air.

Aufgabe der Erfindung war es, die Isolierwirkung von Wärmedämmformkörpern auf Basis von verpreßtem, mikroporösem Wärmedämmaterial im Temperaturbereich von etwa -50°C bis 200°C-zu verbessern.The object of the invention was to improve the insulating effect of molded thermal bodies based on compressed, microporous thermal insulation material in the temperature range from about -50 ° C to 200 ° C.

Es wurde nun gefunden, daß die Isolierwirkung von Formkörpern auf Basis von verpreßtem, mikroporösem Material dadurch verbessert werden kann, daß die Formkörper evakuiert werden. Alternativ dazu können diese Formkörper an- statt mit Luft mit Gasen wie Krypton, Xenon, Schwefelhexafluorid oder Kohlendioxid erfüllt sein. Überraschenderweise ist der Verbesserungseffekt bezüglich der Isolierwirkung, der durch Evakuieren dieser Formkörper erzielt wird, immer noch so groß, daß er den erhöhten konstruktiven Aufwand lohnt, obwohl der Luftgehalt von verpreßten Formkörpern gegenüber Schüttungen naturgemäß bereits durch den Preßvorgang stark reduziert wurde.It has now been found that the insulating effect of moldings based on compressed, microporous material can be improved by evacuating the moldings. Alternatively, instead of air, these moldings can be filled with gases such as krypton, xenon, sulfur hexafluoride or carbon dioxide. Surprisingly, the improvement effect with regard to the insulating effect, which is achieved by evacuating these moldings, is still so great that it pays off the increased design effort, although the air content of pressed moldings compared to fillings has naturally already been greatly reduced by the pressing process.

Gegenstand der Erfindung sind Wärmedämmplatten auf Basis von verpreßtem; mikroporösem Wärmedämmstoff mit Umhüllung, die dadurch gekennzeichnet sind, daß der Partialdruck von Luft innerhalb der umhüllten Wärmedämmplatten weniger als 20 mbar beträgt.The invention relates to thermal insulation boards based on pressed; Microporous thermal insulation material with a sheath, which are characterized in that the partial pressure of air inside the sheathed thermal insulation boards is less than 20 mbar.

Die erfindungsgemäßen Wärmedämmplatten können, falls erwünscht, einen Gehalt an Krypton, Xenon, Schwefelhexafluorid oder Kohlendioxid aufweisen. Der Partialdruck an den genannten Gasen kann 0 - 1000 mbar, insbesondere 0 - bis 400 mbar betragen.If desired, the thermal insulation boards according to the invention can have a content of krypton, xenon, sulfur hexafluoride or carbon dioxide. The partial pressure on the gases mentioned can be 0-1000 mbar, in particular 0-400 mbar.

Als mikroporöser Wärmedämmstoff werden feinteilige Metalloxide eingesetzt. Folgende typische Zusammensetzungen für Wärmedämmaterial haben sich bewährt:

  • 30 - 100 Gew.% feinteiliges Metalloxid
  • 0 - 30 Gew.% Trübungsmittel
  • 0 - 20 Gew.% Fasermaterial
  • 0 - 15 Gew.% anorganisches Bindemittel. :
Finely divided metal oxides are used as the microporous thermal insulation material. The following typical compositions thermal insulation materials have proven their worth:
  • 30-100% by weight of finely divided metal oxide
  • 0 - 30% by weight opacifier
  • 0-20% by weight of fiber material
  • 0 - 15% by weight of inorganic binder. :

Vorzugsweise beträgt der Bindemittelanteil 0,3 bis 1,5 Gew.%.The proportion of binder is preferably 0.3 to 1.5% by weight.

Beispiele für feinteiliges Metalloxid sind pyrogen erzeugte Kieselsäuren, einschließlich Lichtbogenkieselsäu- ren, alkaliarme Fällungskieselsäuren; analog hergestelltes Aluminiumoxid, Titandioxid und Zirkondioxid. Die fein- teiligen Metalloxide weisen spezifische Oberflächen von 50 - 700 qm/g, vorzugsweise 70 - 400 qm/g auf.Examples of finely divided metal oxide are pyrogenic silicas, including arcing silicas, low-alkali precipitated silicas; Aluminum oxide, titanium dioxide and zirconium dioxide produced analogously. The finely divided metal oxides have specific surfaces of 50-700 m2 / g, preferably 70-400 m2 / g.

Als Trübungsmittel kommen Ilmenit, Titandioxid, Siliciumcarbid, Eiseh-II-Eisen-III-Mischoxid, Chromdioxid, Zirkonoxid, Mangandioxid, sowie Eisenoxid in Betracht. Die Trübungsmittel weisen vorteilhafterweise ein Absorptionsmaximum im Infrarotbereich zwischen 1,5 und 10 pm auf.Ilmenite, titanium dioxide, silicon carbide, iron-II-iron-III mixed oxide, chromium dioxide, zirconium oxide, manganese dioxide and iron oxide are suitable as opacifiers. The opacifiers advantageously have an absorption maximum in the infrared range between 1.5 and 10 pm.

Beispiele für Fasermaterial sind Glaswolle, Steinwolle, Schlackenwolle, keramische Fasern, wie sie aus Schmelzen von Aluminiumoxid und/oder Siliciumoxid gewonnen werden, Asbestfasern und andere.Examples of fiber material are glass wool, rock wool, slag wool, ceramic fibers such as those obtained from melts of aluminum oxide and / or silicon oxide, asbestos fibers and others.

Als anorganisches Bindemittel werden beispielsweise die Boride des Aluminiums, des Titans, des Zircons, des Calciums, Silicide wie Calciumsilicid und Calcium-Aluminium-Silicid, insbesondere durch Borcarbid eingesetzt. Beispiele für weitere Bestandteile sind basische Oxide, insbesondere Magnesiumoxid, Calciumoxid oder Bariumoxid.The inorganic binders used are, for example, the borides of aluminum, titanium, zirconium, calcium, silicides such as calcium silicide and calcium aluminum silicide, in particular by boron carbide. Examples of further constituents are basic oxides, in particular magnesium oxide, calcium oxide or barium oxide.

Die erfindungsgemäßen Wärmedämmplatten weisen zumeist eine ebene Form auf. In speziellen Fällen können sie jedoch auch die Form von Kreissegmenten und dergleichen annehmen. Als weitere Formgebungselemente seien abgeschrägte Kanten, Falze und dergleichen genannt.The thermal insulation boards according to the invention mostly have a flat shape. In special cases, however, they can also take the form of circular segments and the like. Beveled edges, folds and the like may be mentioned as further shaping elements.

Die Wärmedämmplatten auf Basis von mikroporösem Material sind erfindungsgemäß mit gasdichten Umhüllungen versehen. An die Druckfestigkeit dieser Umhüllungen sind relativ geringe Ansprüche zu stellen, da sie in unmittelbarem Kontakt mit dem Formkörper stehen und damit derart abgestützt sind, daß der Druck der umgebenden Atmosphäre abgefangen wirdAccording to the invention, the thermal insulation boards based on microporous material are provided with gas-tight envelopes. Relatively low demands are to be made of the compressive strength of these envelopes, since they are in direct contact with the molded body and are thus supported in such a way that the pressure of the surrounding atmosphere is absorbed

Beispiele für Umhüllungsmaterial sind Verbundfolien mit einer Schichtfolge aus thermoplastischem Material/Metallfolie/thermoplastischem Material. Im speziellen Fall besteht eine solche Verbundfolie aus einer Schichtfolge von Polypropylen/Aluminiumfolie/Polyester. Andere Beispiele sind Verbundfolien mit einer Schichtfolge aus Polyfluorkohlenwasserstoff/Polyimid, die noch ggf. eine Schicht aus Aluminiumfolie aufweisen können. Vorzugsweise besteht die Umhüllung aus Gründen der günstigen Fertigung der erfindungsgemäßen Wärmedämmplatten aus zwei getrennten Schichten, einer ersten Schicht, die aus einem thermoplastischen Material, wie beispielsweise Polyethylen, besteht, und einer zweiten Schicht, die aus einer der vorstehend genannten Verbundfolien bestehen kann.Examples of wrapping material are composite films with a layer sequence of thermoplastic material / metal foil / thermoplastic material. In a special case, such a composite film consists of a layer sequence of polypropylene / aluminum film / polyester. Other examples are composite foils with a layer sequence of polyfluorocarbon / polyimide, which may also have a layer of aluminum foil. For reasons of cheap manufacture of the thermal insulation boards according to the invention, the covering preferably consists of two separate layers, a first layer which consists of a thermoplastic material, such as polyethylene, and a second layer which can consist of one of the aforementioned composite films.

Es können jedoch auch z.B. Glasplatten als Umhüllung dienen, die durch gasdichte Dichtungsmassen verbunden sind. Beispiele für derartige Dichtungsmassen sind Polymerisate und Copolymerisate von Hexafluoropropylen, Vinylidenfluörid und dergleichen.However, e.g. Glass plates serve as a covering, which are connected by gas-tight sealing compounds. Examples of such sealing compounds are polymers and copolymers of hexafluoropropylene, vinylidene fluoride and the like.

Zur Herstellung der erfindungsgemäßen Wärmedämmplatten werden zunächst die Formkörper nach an sich bekannten Methoden vorgefertigt. Vorzugsweise umfaßt die Fertigung folgende Verfahrensschritte:

  • a) Vorverdichten der Wärmedämmischung auf Basis von mikroporösem Wärmedämmaterial bei Drücken von 1 - 5 bar, insbesondere etwa 2 bar;
  • b) Verpressen des vorverdichteten Materials in die Endform bei Enddrücken von 10 - 15 bar, wobei gegenüber dem Schüttgewicht des mikroporösem Materials eine etwa 5- bis 10-fache Verdichtung erfolgt.
  • c) gegebenenfalls Erhitzen des verpreßten Formkörpers bei Temperaturen von 500°C bis 800°C.
To produce the thermal insulation boards according to the invention, the moldings are first prefabricated according to methods known per se. Manufacturing preferably comprises the following process steps:
  • a) pre-compressing the thermal insulation mixture based on microporous thermal insulation material at pressures of 1-5 bar, in particular about 2 bar;
  • b) pressing the precompressed material into the final shape at final pressures of 10-15 bar, about 5 to 10 times the compression compared to the bulk density of the microporous material.
  • c) optionally heating the pressed molded body at temperatures of 500 ° C to 800 ° C.

Beim Vorverdichten bzw. Verpressen sollen die in der Schüttung eingeschlossenen Gase entweichen können. Daher erfolgt das Verdichten und Verpressen vorzugsweise unter Anlegen von Unterdruck. Das Entgasen kann auch schon vor dem Verdichten bzw. Verpressen erfolgen.The gases enclosed in the bed should be able to escape during pre-compression or compression. Therefore, the compression and compression is preferably carried out with the application of negative pressure. Degassing can also take place before compression or compression.

Der vorgefertigte Formkörper wird anschließend mit einer Umhüllung versehen und schließlich evakuiert, bis der Partialdruck an Luft 20 mbar nicht mehr übersteigt. Typischerweise wird evakuiert, bis der Partialdruck an Luft 20 mbar bis 10-4 mbar beträgt. Falls erwünscht kann das evakuierte System anschließend mit Gasen wie Krypton, Xenon, Schwefelhexafluorid, Kohlendioxid oder deren Gemischen gefüllt werden. Abschließend wird die Umhüllung luftdicht versiegelt. Eine derartige Versiegelung erfolgt beispielsweise durch Abschweißen der vorstehend beschriebenen Verbundfolien.The prefabricated molded body is then provided with a covering and finally evacuated until the partial pressure in air no longer exceeds 20 mbar. Typically, evacuation is carried out until the partial pressure in air is 20 mbar to 10 -4 mbar. If desired, the evacuated system can then be filled with gases such as krypton, xenon, sulfur hexafluoride, carbon dioxide or mixtures thereof. Finally, the covering is sealed airtight. Such sealing is carried out, for example, by welding the composite films described above.

Die erfindungsgemäßen Wärmedämmplatten finden insbesondere Verwendung zur Isolierung im Temperaturbereich von -50°C bis 200°C. Sie dienen beispielsweise als Isolierungen in Kühlhauseinribhtungen. Eine weitere Anwendung eröffnet sich als Zusatzelement für Wärmeisolie-The thermal insulation boards according to the invention are used in particular for insulation in the temperature range from -50 ° C. to 200 ° C. They are used, for example, as insulation in cold store equipment. Another application opens up as an additional element for thermal insulation

rungen in ßpeicheröfen und dergleichen, wobei sie vorzugsweise im Verbund mit nicht evakuierten Hochtemperatur-Isolierungen auf Basis von mikroporösem Wärmedämmstoff eingesetzt werden. Hierbei ist vorgesehen, daß die nicht evakuierte Wärmedämmschicht so ausgelegt ist, daß ein Wärmegefälle auf eine Temperatur von etwa 100°C bis 200°C entsteht und im Verbund dazu die erfindungsgemäße, evakuierte Wärmedämmplatte ein Wärmegefälle insgesamt auf eine Temperatur, die im Bereich der Umgebungstemperatur liegt, sichert.stanchions in ßpeicheröfen and the like, wherein they are preferably used in conjunction with non-evacuated high-temperature insulation based on microporous thermal insulation. It is provided that the non-evacuated thermal insulation layer is designed so that a heat gradient arises to a temperature of about 100 ° C to 200 ° C and, in conjunction with this, the evacuated thermal insulation board according to the invention a heat gradient overall to a temperature which is in the range of the ambient temperature lies, secures.

Durch Einsatz der erfindungsgemäßen Wärmedämmplatten stehen hochleistungsfähige Isolieranordnungen zur Verfügung, deren Schichtdicken gegenüber herkömmlichen Isolieranordnungen mit vergleichbarer Isolierwirkung entscheidend reduziert sind. Die Montage der erfindungsgemäßen Wärmedämmplatten erfolgt in gleicher Weise wie die Montage herkömmlicher Wärmedämmplatten.By using the thermal insulation boards according to the invention, high-performance insulation arrangements are available whose layer thicknesses are significantly reduced compared to conventional insulation arrangements with a comparable insulation effect. The thermal insulation panels according to the invention are assembled in the same way as the assembly of conventional thermal insulation panels.

Beispiel:Example:

Es wurde eine 20 mm dicke Platte (Fläche 300 x 300 mm) durch Verpressen einer Wärmedämmischung aus

  • 60 Gew.% hochdisperser Kieselsäure
  • 34,5 Gew.% Ilmenit
  • 5 Gew.% Aluminiumsilikat-Faser
  • 0,5 Gew.% Borcarbid
bei 10 kp/cm2 verpreßt.A 20 mm thick plate (area 300 x 300 mm) was pressed out by pressing a thermal insulation mixture
  • 60% by weight of highly disperse silica
  • 34.5% by weight of ilmenite
  • 5% by weight aluminum silicate fiber
  • 0.5% by weight boron carbide
pressed at 10 kp / cm 2 .

Die Platte wurde mit einer 100 µm dicken Verbundfolie (Polypropylen/Aluminium/Polyester) umhüllt und auf einen Restdruck von 20 mbar evakuiert.The plate was coated with a 100 µm thick composite film (polypropylene / aluminum / polyester) and evacuated to a residual pressure of 20 mbar.

Die Wärmeleitzahl 1 der Platte betrug bei 100 °C

Figure imgb0001
The thermal conductivity number 1 of the plate was 100 ° C
Figure imgb0001

Zum Vergleich wurde für die nicht evakuierte Platte eine Wärmeleitzahl von

Figure imgb0002
gemessen.For comparison, a coefficient of thermal conductivity of
Figure imgb0002
 measured.

Entsprechend ergibt sich eine um 46 % erhöhte Wärmedämmeffizienz bei der erfindungsgemäßen Platte.Correspondingly, there is a 46% increase in thermal insulation efficiency in the panel according to the invention.

Claims (3)

1. Wärmedämmplatten auf Basis von verpreßtem, mikroporösem Wärmedämmstoff mit Umhüllung, dadurch gekennzeichnet , daß der Partialdruck von Luft innerhalb der umhüllten Wärmedämmplatte weniger als 20 mbar beträgt.1. Thermal insulation panels based on pressed, microporous thermal insulation material with a sheath, characterized in that the partial pressure of air within the coated thermal insulation panel is less than 20 mbar. 2. Wärmedämmplatten nach Anspruch 1, gekennzeichnet durch einen Gehalt an Krypton, Xenon, Schwefelhexafluorid, Kohlendioxid oder deren Gemischen.2. Thermal insulation panels according to claim 1, characterized by a content of krypton, xenon, sulfur hexafluoride, carbon dioxide or mixtures thereof. 3. Wärmedämmplatten nach mindestens einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß als Umhüllung eine Verbundfolie verwendet wird, die aus zumindest einer metallischen Schicht und einer Schicht aus thermoplastischem Polymermaterial besteht.3. Thermal insulation panels according to at least one of claims 1 and 2, characterized in that a composite film is used as the sheath, which consists of at least one metallic layer and a layer of thermoplastic polymer material.
EP19850106109 1984-05-18 1985-05-17 Enveloped heat-insulating member Expired EP0164006B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85106109T ATE39523T1 (en) 1984-05-18 1985-05-17 HEAT INSULATION MOLDED BODY WITH COVER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3418637 1984-05-18
DE19843418637 DE3418637A1 (en) 1984-05-18 1984-05-18 THERMAL INSULATION BODY WITH COVER

Publications (2)

Publication Number Publication Date
EP0164006A1 true EP0164006A1 (en) 1985-12-11
EP0164006B1 EP0164006B1 (en) 1988-12-28

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ID=6236291

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Country Status (5)

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US (1) US4636416A (en)
EP (1) EP0164006B1 (en)
JP (1) JPS60260796A (en)
AT (1) ATE39523T1 (en)
DE (2) DE3418637A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0190582A2 (en) * 1985-02-08 1986-08-13 General Electric Company Thermal insulating slabs for freezers and refrigerators comprising an envelope filled with precipitated silica which is subsequently compressed and the process for their manufacture
DE4106727A1 (en) * 1991-03-02 1992-09-03 Porotherm Daemmstoffe Gmbh Microporous compressed heat-insulating body - comprising partial or complete shrink-coating, useful on thermal surfaces e.g. heating systems and exhaust gas lines, etc.
EP1566264A1 (en) * 2004-02-18 2005-08-24 SCHWENK Dämmtechnik GmbH & Co KG Heat insulating panel

Families Citing this family (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61241595A (en) * 1985-04-16 1986-10-27 Matsushita Electric Ind Co Ltd Vacuum heat-insulating structure body
US4681788A (en) * 1986-07-31 1987-07-21 General Electric Company Insulation formed of precipitated silica and fly ash
DE3737459A1 (en) * 1987-11-05 1989-05-18 Wacker Chemie Gmbh THERMAL INSULATION BODY WITH COATING BASED ON COMPRESSED, MICROPOROUS HEAT INSULATION
DE3816979A1 (en) * 1988-05-18 1989-11-30 Wacker Chemie Gmbh THERMAL INSULATION BODIES BASED ON COMPRESSED, MICROPOROUS HEAT INSULATION WITH A COVER BASED ON METALS
US5362541A (en) * 1988-08-24 1994-11-08 Degussa Aktiengesellschaft Shaped articles for heat insulation
FR2643667B1 (en) * 1989-02-24 1991-06-21 France Etat Ponts Chaussees INSULATING MASONRY BLOCK AND CARRIER AND METHOD FOR MANUFACTURING THE BLOCK
US5316816A (en) * 1989-05-10 1994-05-31 Degussa Aktiengesellschaft Form body for heat insulation and vacuum insulation panel with asymmetric design
DE3915170A1 (en) * 1989-05-10 1990-11-15 Degussa FORMKOERPER FOR HEAT INSULATION
CH678565A5 (en) * 1989-06-21 1991-09-30 Isolfeu Ag Zuerich
DE4029405A1 (en) * 1990-03-16 1991-09-19 Degussa FORMKOERPER FOR HEAT INSULATION
DE4018970A1 (en) * 1990-06-13 1991-12-19 Schatz Oskar VACUUM HEAT INSULATION SUITABLE FOR THE TRANSFER OF PRESSURE FORCE, ESPECIALLY FOR HEAT STORAGE OF CRAC VEHICLES
DE4019870A1 (en) * 1990-06-22 1992-01-09 Degussa VACUUM INSULATION PANEL WITH ASYMMETRIC CONSTRUCTION
GB9016621D0 (en) * 1990-07-28 1990-09-12 Dunbrik Yorks Ltd Method of flue insulation
GB9017279D0 (en) * 1990-08-07 1990-09-19 Micropore International Ltd Method for making a body of particulate insulating material
TR25085A (en) * 1991-03-04 1992-11-01 Degussa Ag Dallare Ind Limited CONSTRUCTION OF HIGH CRYSTALIZATION RANGE FOR HIGH CRYSTALIZATION SPEED FOR GLASSING ELEMENTS OF HORIZONTAL AND VERTICAL ACTION AND WINDOW BULBS.
US5270092A (en) * 1991-08-08 1993-12-14 The Regents, University Of California Gas filled panel insulation
SE507295C2 (en) * 1992-01-18 1998-05-11 Thyssen Nordseewerke Gmbh Thermal insulation Moldings
GB2264296B (en) * 1992-02-07 1995-06-28 Zortech Int Microporous thermal insulation material
US6153135A (en) * 1993-01-08 2000-11-28 Novitsky; Charles Method for producing vacuum insulating and construction material
DE4307818A1 (en) * 1993-03-12 1994-09-15 Hans Dr Viesmann Wall element
DE4310613A1 (en) * 1993-03-31 1994-10-06 Wacker Chemie Gmbh Microporous thermal insulation molded body
US5478867A (en) * 1993-07-07 1995-12-26 The Dow Chemical Company Microporous isocyanate-based polymer compositions and method of preparation
DE4339435C2 (en) * 1993-11-19 1996-02-29 Jochen Dr Fricke Multi-pane panel as a thermally insulating component
DE4344713A1 (en) * 1993-12-27 1995-03-09 Aabh Patent Holdings Double-walled thermal insulation
US5877100A (en) * 1996-09-27 1999-03-02 Cabot Corporation Compositions and insulation bodies having low thermal conductivity
DE19647567C2 (en) * 1996-11-18 1999-07-01 Zae Bayern Vacuum thermal insulation panel
DE19704323C1 (en) * 1997-02-05 1998-07-02 Saskia Solar Und Energietechni Vacuum-containing thermal insulator
US6010762A (en) * 1998-01-15 2000-01-04 Cabot Corporation Self-evacuating vacuum insulation panels
DE19809316C2 (en) * 1998-03-05 2000-11-09 Plus Recycling Gmbh R Heat insulation body and multilayer body therefor
US6513974B2 (en) 1998-09-17 2003-02-04 Thomas G. Malone Inflatable insulating liners for shipping containers
US6099749A (en) * 1998-09-25 2000-08-08 Cabot Corporation Method of compacting a fumed metal oxide-containing composition
DE19928011A1 (en) * 1999-06-19 2000-12-21 Porextherm Daemmstoffe Gmbh Insulating board, especially for the low temperature range, e.g. in refrigeration plant, refrigerators and refrigerated technical equipment, preferably based on metal oxide powder, contains desiccant
US20030128898A1 (en) * 1999-09-17 2003-07-10 Malone Thomas G. Inflatable insulating liners including phase change material
US6755568B2 (en) 2000-12-21 2004-06-29 Cargo Technology, Inc. Inflatable insulating liners for shipping containers and method of manufacture
US20040018336A1 (en) * 2002-07-29 2004-01-29 Brian Farnworth Thermally insulating products for footwear and other apparel
DE10308581A1 (en) * 2003-02-27 2004-09-16 Wacker-Chemie Gmbh Thermal insulation for underwater components for oil and gas production
DE10325607A1 (en) * 2003-06-05 2004-12-23 Wacker-Chemie Gmbh Vacuum insulation panel containing a microporous thermal insulation panel with increased mechanical strength
WO2009032763A1 (en) 2007-08-28 2009-03-12 Fi-Foil Company, Inc. A system and method for insulating items using a reflective or inflatable insulation panel
US8333279B2 (en) * 2008-09-11 2012-12-18 Simple Container Solutions, Inc. Expandable insulated packaging
JP5591513B2 (en) 2009-10-16 2014-09-17 ニチアス株式会社 Insulating material and manufacturing method thereof
KR101417249B1 (en) * 2011-02-21 2014-07-16 (주)엘지하우시스 Material for vacuum insulation pannel and method for fabricating the same
US9744752B2 (en) 2012-01-24 2017-08-29 Inflatek Innovations, Llc Inflatable panel and method of manufacturing same
GB2507325A (en) * 2012-10-26 2014-04-30 Euroform Products Ltd Composite insulation including gas filled pockets
US9606587B2 (en) * 2012-10-26 2017-03-28 Google Inc. Insulator module having structure enclosing atomspheric pressure gas
US9057472B2 (en) * 2012-11-01 2015-06-16 Ragui Ghali Insulation material
US8861191B1 (en) 2013-09-30 2014-10-14 Google Inc. Apparatus related to a structure of a base portion of a computing device
US9430006B1 (en) 2013-09-30 2016-08-30 Google Inc. Computing device with heat spreader
US9442514B1 (en) 2014-07-23 2016-09-13 Google Inc. Graphite layer between carbon layers
CN108506646B (en) * 2017-02-28 2024-04-26 芜湖美的厨卫电器制造有限公司 Heat preservation section bar and water heater
GB2569787B (en) * 2017-12-20 2020-06-17 Acergy France SAS Insulation of pipe-in-pipe systems

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR732594A (en) * 1931-03-03 1932-09-22 Improvements in thermal insulation
DE2443390A1 (en) * 1974-09-11 1976-03-25 Elmar Dr Ing Mangerich Double glazing with high thermal insulation - obtd by coating glass with metal and filling cavity with inert gas
FR2321025A1 (en) * 1975-08-12 1977-03-11 Bfg Glassgroup PANEL-SHAPED CONSTRUCTION ELEMENT, PARTICULARLY SUITABLE AS A FACADE ELEMENT
EP0047494A2 (en) * 1980-09-05 1982-03-17 Wacker-Chemie GmbH Heat insulating panel
US4444821A (en) * 1982-11-01 1984-04-24 General Electric Company Vacuum thermal insulation panel

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4269323A (en) * 1978-02-03 1981-05-26 Nippon Sanso Kabushiki Kaisha Heat insulated tank
JPS5947216B2 (en) * 1979-06-11 1984-11-17 日産自動車株式会社 Heat storage device for heater
DE2928695C2 (en) * 1979-07-16 1984-05-30 Grünzweig + Hartmann und Glasfaser AG, 6700 Ludwigshafen Thermal insulation body and process for its manufacture
US4304824A (en) * 1980-11-10 1981-12-08 Karpinski Ralph E Flexible modular insulation
JPS5796852A (en) * 1980-12-09 1982-06-16 Matsushita Electric Ind Co Ltd Heat insulating material
DE3108816A1 (en) * 1981-03-09 1982-09-30 Grünzweig + Hartmann und Glasfaser AG, 6700 Ludwigshafen THERMAL INSULATING COMPRESSION MATERIAL BASED ON MICROPOROUS OXIDAEROGEL FROM FLAME HYDROLYSIS, METHOD FOR THE PRODUCTION THEREOF, A FILM PRODUCED THEREOF AND A WASHED PRODUCT THEREFOR
JPS57173691A (en) * 1981-04-20 1982-10-26 Tokyo Shibaura Electric Co Multi-layer heat insulating panel and manufacture thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR732594A (en) * 1931-03-03 1932-09-22 Improvements in thermal insulation
DE2443390A1 (en) * 1974-09-11 1976-03-25 Elmar Dr Ing Mangerich Double glazing with high thermal insulation - obtd by coating glass with metal and filling cavity with inert gas
FR2321025A1 (en) * 1975-08-12 1977-03-11 Bfg Glassgroup PANEL-SHAPED CONSTRUCTION ELEMENT, PARTICULARLY SUITABLE AS A FACADE ELEMENT
EP0047494A2 (en) * 1980-09-05 1982-03-17 Wacker-Chemie GmbH Heat insulating panel
US4444821A (en) * 1982-11-01 1984-04-24 General Electric Company Vacuum thermal insulation panel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0190582A2 (en) * 1985-02-08 1986-08-13 General Electric Company Thermal insulating slabs for freezers and refrigerators comprising an envelope filled with precipitated silica which is subsequently compressed and the process for their manufacture
EP0190582B1 (en) * 1985-02-08 1994-11-02 General Electric Company Thermal insulating slabs for freezers and refrigerators comprising an envelope filled with precipitated silica which is subsequently compressed and the process for their manufacture
DE4106727A1 (en) * 1991-03-02 1992-09-03 Porotherm Daemmstoffe Gmbh Microporous compressed heat-insulating body - comprising partial or complete shrink-coating, useful on thermal surfaces e.g. heating systems and exhaust gas lines, etc.
EP1566264A1 (en) * 2004-02-18 2005-08-24 SCHWENK Dämmtechnik GmbH & Co KG Heat insulating panel

Also Published As

Publication number Publication date
ATE39523T1 (en) 1989-01-15
US4636416A (en) 1987-01-13
EP0164006B1 (en) 1988-12-28
JPH0355719B2 (en) 1991-08-26
DE3567048D1 (en) 1989-02-02
DE3418637A1 (en) 1985-11-21
JPS60260796A (en) 1985-12-23

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