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WO1999004966A1 - Panneaux isolants avec barriere interne rayonnante - Google Patents

Panneaux isolants avec barriere interne rayonnante Download PDF

Info

Publication number
WO1999004966A1
WO1999004966A1 PCT/US1998/015090 US9815090W WO9904966A1 WO 1999004966 A1 WO1999004966 A1 WO 1999004966A1 US 9815090 W US9815090 W US 9815090W WO 9904966 A1 WO9904966 A1 WO 9904966A1
Authority
WO
WIPO (PCT)
Prior art keywords
course
panel
cell walls
layer
outer skin
Prior art date
Application number
PCT/US1998/015090
Other languages
English (en)
Inventor
Michael B. Kerschner
Original Assignee
Quantum International Incorporated
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
Application filed by Quantum International Incorporated filed Critical Quantum International Incorporated
Priority to AU85046/98A priority Critical patent/AU8504698A/en
Publication of WO1999004966A1 publication Critical patent/WO1999004966A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/34—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts
    • E04C2/36—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts spaced apart by transversely-placed strip material, e.g. honeycomb panels
    • E04C2/365—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts spaced apart by transversely-placed strip material, e.g. honeycomb panels by honeycomb structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/02—Cellular or porous
    • B32B2305/024—Honeycomb
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating

Definitions

  • the present invention relates to Multi-Layer Reflective Insulation (MLRI) and more particularly to MLRI panels incorporating an intermediate, radiant barrier septum.
  • MLRI Multi-Layer Reflective Insulation
  • Conductive heat transfer occurs when energy is transmitted by a medium, usually solid in nature, which does not involve the movement of the medium fluid in nature; convective heat transfer occurs when energy is transmitted by a medium that is in motion; and radiant heat transfer occurs when energy is transmitted by waves or particles through a space or vacuum.
  • Conventional insulation used in structures is particularly suited for resisting conductive heat transfer by absorbing heat and eventually re-emitting that absorbed heat. Such insulation also reduces convective heat transfer because it generally creates small air pockets loosely defined by the loft of insulative material, thereby interfering with the ability of air trapped within the pockets to freely move, a precondition to heat transfer via the convective mode.
  • non-moving air is a poor medium for conductive heat transfer.
  • What is noticeably absent in conventional mass fiber or rigid forms of insulation is a true ability to block significant radiant energy/heat transfer.
  • the primary mode of heat transfer in exterior envelope structures is radiant.
  • the present invention is intended to provide an insulative barrier having superior emissivity properties in an inexpensive form using readily available construction materials.
  • the insulating panel comprises a first course of open cells defined by a plurality of cell walls and a second course of open cells defined by a plurality of cell walls between which is disposed a radiant barrier septum.
  • the cell walls may be constructed from any suitable material having low conductive properties such as cellulose, polymers, and aramid compositions.
  • a preferred embodiment uses open-ended honeycomb-like cell formations constructed from cellulose.
  • the cell walls can be constructed using polymers such as polycarbonate or polyvinyl materials, especially in high moisture or water environments.
  • Nomex ® and aramid fiber materials may be used where undesired combustion is to be avoided.
  • substitute geometric configurations may be employed and included using a corrugated pattern wherein the open ends face the outer surfaces of the panel.
  • the septum material acts as the primary internal barrier to radiant heat transfer.
  • the septum material can be any low emissivity sheet material and is preferably constructed from a three part laminate comprising a polymer sheet substrate to which is bonded on either side a low emissivity metal to provide desirable radiant barrier properties in both directions.
  • industrial grade aluminum having a purity of about 99% is vapor impregnated onto a Mylar ® or polyethylene sheet substrate to yield a septum having a thickness ranging from 0.0001 to 0.0005 of an inch.
  • septum materials are controlled by the desire to provide an effective radiant barrier.
  • a thin foil of material is considered an appropriate substitute for the noted laminate.
  • the material should have emissive properties similar to that provided by aluminum and may comprise, for example, alloys of aluminum, gold, silver, platinum or other metals. It is desirable that the septum chosen have emissivities in the range of 5% and less, with emissivities lower than 3% preferred.
  • the outer skin of the panels may be omitted, or constructed from any suitable material capable of being formed into sheet material.
  • the importance of the function of the septum becomes readily apparent.
  • Such applications may include items such as interior cores for various door types. Imbedded placement within other composite structures, ice cooler walls, hot tub covers and structural panels.
  • the skin material can range from flexible to rigid. In one embodiment, typical cellulose-type kraft paper is used. In most applications, the basis weight of the skin materials should be between 10 and 100 pounds per cubic foot, and preferably between 15 and 50 pounds per cubic foot. In other applications, paneling, drywall, or wallpaper types of finishes may be used, especially when retro-fitting building structures. If structural applications are considered, then skin materials such as rigid plywood or structural siding may be employed. These skin materials are highly desirable in applications wherein structural insulated panels (SIP) are required.
  • SIP structural insulated panels
  • the panels of the present invention are to be used in exterior insulated finish systems (EIFS), then suitable netting or mesh skin materials can be used.
  • EIFS exterior insulated finish systems
  • a waterproof outer skin should be incorporated into the panel to reduce exposure of the septum to these compounds.
  • the septum material may be adhered to an outer skin whereafter the combination may be adhered, either with the septum adjacent to the cells or separated from the cells by the skin, to the cell walls.
  • a three or more course embodiment utilizes the teachings with respect to the two course embodiment, namely the introduction of a septum layer in between each course of open cells. The choice of a single or multiple course embodiment is chiefly driven by the level of convective/conductive heat and/or acoustic insulation desired since each septum layer will preferably reduce radiant heat transmission by about 95%.
  • Fig. 1 is a cut-away perspective view of a three course, two septum panel embodiment of the invention wherein each cell course is vertically offset and the septums have very low emissivity values;
  • Fig. 2 is a plan view of a sinusoidal cell pattern wherein each sinusoidal cell wall is laterally offset by 180° from adjacent cell walls;
  • FIG. 3 is a cut-away perspective view of a single course panel embodiment of the invention.
  • Fig. 4 is a side elevation of a barbed fastener used to secure a panel to a substrate; and Fig. 5 is a side elevation of the barbed fastener in Fig. 4 shown bonded to a substrate and engaged with a panel section.
  • Fig. 1 a cut-away perspective view of a three course, two septum embodiment of the invention is shown.
  • panel 10 is shown to consist of a first course 12, a second course 14, and a third course 16 of open cell material having cell walls 18 defining the peripheral surface of each cell 20.
  • Septums 30 are shown disposed between courses 12 and 14, and 14 and 16.
  • the type of open cell 20 illustrated is generally honeycomb-type wherein walls 18 are constructed from cellulose having a basis weight of preferably within 5 to 40 pounds per cubic foot.
  • Fig. 2 An alternative to using a honeycomb cell structure is illustrated in Fig. 2 wherein a pair of sinusoidal curves mated in an inverted or 180° offset relationship define each cell 20.
  • nearly any type of geometric polygon or circular cylinder may be employed and still achieve desired functionality.
  • cell wall material is largely a design choice taking into account required compressive, axial, rack and sheer strength requirements; however, material selection should be limited to those having low thermal conductance properties, low manufacturing costs, and good adhesion characteristics.
  • thermal conducting materials such as metal should be avoided.
  • cellulose, polymers, and aramid compositions are used to form cell walls 18.
  • a preferred embodiment uses open-ended honeycomb cells constructed from cellulose.
  • Alternative construction materials include polymers such as polycarbonate or polyvinyl compositions, which are especially appropriate in high moisture or fluid water environments.
  • Nomex ® and aramid fiber materials may be used where undesired combustion is to be avoided.
  • substitutes for a honeycomb construction may be employed such as the use of corrugated materials selected from the above referenced materials as illustrated in Fig. 2, or foamed polymeric materials.
  • each course 12, 14, and 16 is preferably misaligned or staggered relative to any adjacent course.
  • This misalignment or course offset reduces thermal conductive bridging between cell walls 18 of each course 12, 14, and 16 by making the cell wall contact significantly less contiguous.
  • the intentional misalignment reduces the potential for thermal conductive bridging to less than 8% of the total panel surface area when panel 10 is exposed to a heat differential between outer skins 40a and 40b.
  • greater than 92% of the panel surface area is resourcefully designed non-collapsible airspace wherein the mode of heat flux is predominantly non-conductive heat transfer.
  • each cell 20 creates a small pocket of trapped air in conjunction with septum 30 and thus reduces convective heat transfer, and because the courses of cells are intentionally offset to reduce conductive heat transfer, the remaining mode of heat transference is essentially radiant.
  • septums 30 are chosen to be highly reflective, i.e., possessing very low emissive properties. In selecting septum materials of this nature, radiant heat transfer is significantly reduced at each septum boundary, leaving only reduced conductive transfer.
  • each septum 30 consists of three layers of material, namely, polymer sheet substrate 32 to which is bonded on both sides aluminum coating 34 and 36 to provide desirable radiant barrier properties in both directions.
  • industrial grade aluminum having a purity of about 99% is vapor impregnated onto a Mylar ® or polyethylene sheet substrate to yield a septum having a thickness ranging from 0.0001 to 0.0005 of an inch.
  • each skin 40 has an aluminum coating or layer 42 and 46 on substrate 44 which itself acts as a thermal break. Again, by providing for dual layers, heat transfer is limited both on the external surface as well as the internal surface of each skin 40.
  • a scrim weaving to strengthen the septum either for manufacturing purposes or for use- based reasons.
  • a scrim may be useful when constructing outer skins 40.
  • a single course embodiment such as is shown in Fig. 3, is also within the scope of the invention.
  • a plurality of cells 20 are defined by cell walls 18.
  • the functionality of septum 30 is incorporated into outer skins 40a and 40b. Similar to the metalization treatment of septum 30, outer skins 40 are constructed to have low emissivity properties.
  • outer skin 40 This may be accomplished by incorporating a metal component within outer skin 40, or may be accomplished by bonding a septum sheet directly to the outer skin.
  • the later is more desirable when retro-fitting an existing and desirable outer skin such as when a structural member such as plywood or OSB is used as the outer skin.
  • such treatment of the outer skin may be made to only the cell facing side (the interior side) or the exterior side, or both depending upon design considerations.
  • all cells, septums, and skins are preferably bonded with an adhesive which includes admixtures composed of polyvinyl acetate material with cross-linking agents.
  • an adhesive which includes admixtures composed of polyvinyl acetate material with cross-linking agents.
  • Other types of adhesive may yield desirable results as well and may be even more desirable when constructing more exotic panel configurations.
  • barbed fasteners 50 In applications wherein it is desirable to install panel 10 to a planar backing substrate, barbed fasteners 50, such as illustrated in Fig. 4, are preferred. Barbed fasteners 50, which are available from Quantum International (Puyallup, WA), are ideally constructed from a resilient material such as nylon or any poor conducting material. The choice of this type of material permits barbs 52 to flex towards shaft 54 and return after withdrawal of a compressive force.
  • base 56 is securely fastened or bonded to the substrate using an adhesive such as Eco-Hanger Grip Adhesive 22-15 (Mon-Eco Industries, Inc., East Brunswick, NJ) whereafter panel 10 is impaled upon barbed portion 58 and held captive therewith as is best shown in Fig. 5.
  • panel 10 can be adhered directly to a substrate or fastened from the exposed side by conventional means such as screws, nails, or the like.
  • Insulation Units Covers Walls a. sheathing materials 2. Refrigeration or 2. Factory Work Area b. imbedded in Cryogenic Separation or concrete or earth Vehicles/Vessels Shields c. refrigeration storage 3. Container Shipping 3. EMF Reduction at heated storage Industry - Thin Wall Work Areas d. roofing Insulation underlayment e. insulated suspended ceilings f. insulated ducting material g- road bed equalization insulation

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)

Abstract

Cette invention se rapporte à des panneaux incorporés à fort pouvoir thermo-isolant (10) qui utilisent des barrières rayonnantes en sandwich. Un tel panneau (10) est construit à partir d'au moins deux rangées (12, 14, 16) de cellules ouvertes, délimitées par des parois (18) de faible conductivité, entre lesquelles est disposée une mince barrière rayonnante. Une paire d'enveloppes externes (40) sont de préférence collées aux cellules ouvertes exposées, pour former un produit fini. En disposant les rangées de cellules en couches non alignées verticalement, on réduit en outre l'effet de pont thermoconducteur. En utilisant un matériau à cellules ouvertes, on réduit la convexion thermique. En outre, en incorporation une couche membrane à effet de barrière rayonnant (30), on réduit considérablement le rayonnement thermique. Le produit qui en résulte, qui peut comprendre plus de deux rangées de cellules ouvertes, confère une résistance exceptionnelle à la transférence thermique d'un côté du panneau (10) à l'autre. Cette invention présente également un système de montage de ces panneaux (10) au moyen d'éléments de fixation à barbes (50) ainsi que des procédés de fabrication de ces panneaux (10).
PCT/US1998/015090 1997-07-22 1998-07-21 Panneaux isolants avec barriere interne rayonnante WO1999004966A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU85046/98A AU8504698A (en) 1997-07-22 1998-07-21 Insulation panels with internal radiant barrier

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US89870997A 1997-07-22 1997-07-22
US08/898,709 1997-07-22

Publications (1)

Publication Number Publication Date
WO1999004966A1 true WO1999004966A1 (fr) 1999-02-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/015090 WO1999004966A1 (fr) 1997-07-22 1998-07-21 Panneaux isolants avec barriere interne rayonnante

Country Status (2)

Country Link
AU (1) AU8504698A (fr)
WO (1) WO1999004966A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2839356A1 (fr) * 2002-05-06 2003-11-07 Cit Alcatel Materiau rigide multicouche pour isolation thermique
WO2004016872A1 (fr) * 2002-08-19 2004-02-26 Ashmere Holdings Pty Ltd Panneau acoustique et procede de fabrication correspondant
US8827645B2 (en) 2009-04-23 2014-09-09 Vestas Wind Systems A/S Composite structures
EP2817799A2 (fr) * 2012-02-23 2014-12-31 Noisetech HB Absorbant phonique
US8936847B2 (en) 2006-04-19 2015-01-20 Promethean Insulation Technology Llc Metallized polymeric film reflective insulation material
US9234499B2 (en) 2009-04-23 2016-01-12 Qinetiq Limited Composite structures
US9845596B2 (en) 2015-09-29 2017-12-19 Awi Licensing Llc Ceiling system
JP2018009691A (ja) * 2016-07-04 2018-01-18 フソーパネル工業有限会社 遮熱体
AU2012304262B2 (en) * 2011-09-01 2019-09-12 Ninderry Developments Pty Ltd An insulated wall panel system with cable support

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001473A (en) * 1976-02-19 1977-01-04 Rohr Industries, Inc. Sound attenuating structural honeycomb sandwich material
US5106668A (en) * 1989-06-07 1992-04-21 Hexcel Corporation Multi-layer honeycomb structure
US5460864A (en) * 1993-05-07 1995-10-24 Ciba-Geigy Corporation High temperature 2000 degrees-F burn-through resistant composite sandwich panel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001473A (en) * 1976-02-19 1977-01-04 Rohr Industries, Inc. Sound attenuating structural honeycomb sandwich material
US5106668A (en) * 1989-06-07 1992-04-21 Hexcel Corporation Multi-layer honeycomb structure
US5460864A (en) * 1993-05-07 1995-10-24 Ciba-Geigy Corporation High temperature 2000 degrees-F burn-through resistant composite sandwich panel

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2839356A1 (fr) * 2002-05-06 2003-11-07 Cit Alcatel Materiau rigide multicouche pour isolation thermique
EP1361315A1 (fr) * 2002-05-06 2003-11-12 Alcatel Materiau rigide multicouche pour isolation thermique
US7001656B2 (en) 2002-05-06 2006-02-21 Alcatel Rigid multilayer material for thermal insulation
WO2004016872A1 (fr) * 2002-08-19 2004-02-26 Ashmere Holdings Pty Ltd Panneau acoustique et procede de fabrication correspondant
US8936847B2 (en) 2006-04-19 2015-01-20 Promethean Insulation Technology Llc Metallized polymeric film reflective insulation material
US8827645B2 (en) 2009-04-23 2014-09-09 Vestas Wind Systems A/S Composite structures
US9234499B2 (en) 2009-04-23 2016-01-12 Qinetiq Limited Composite structures
AU2012304262B2 (en) * 2011-09-01 2019-09-12 Ninderry Developments Pty Ltd An insulated wall panel system with cable support
EP2817799A2 (fr) * 2012-02-23 2014-12-31 Noisetech HB Absorbant phonique
US9845596B2 (en) 2015-09-29 2017-12-19 Awi Licensing Llc Ceiling system
JP2018009691A (ja) * 2016-07-04 2018-01-18 フソーパネル工業有限会社 遮熱体

Also Published As

Publication number Publication date
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