WO2009065163A1 - Insulation sheeting - Google Patents

Insulation sheeting Download PDF

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Publication number
WO2009065163A1
WO2009065163A1 PCT/AU2007/001781 AU2007001781W WO2009065163A1 WO 2009065163 A1 WO2009065163 A1 WO 2009065163A1 AU 2007001781 W AU2007001781 W AU 2007001781W WO 2009065163 A1 WO2009065163 A1 WO 2009065163A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
polyethylene
foam
air cell
closed air
Prior art date
Application number
PCT/AU2007/001781
Other languages
French (fr)
Inventor
Raymond Keith Stead
Michael Robert Peter Stoopman
Original Assignee
North Tech Developments Pty Ltd
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 North Tech Developments Pty Ltd filed Critical North Tech Developments Pty Ltd
Priority to PCT/AU2007/001781 priority Critical patent/WO2009065163A1/en
Publication of WO2009065163A1 publication Critical patent/WO2009065163A1/en

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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
    • E04B1/78—Heat insulating elements
    • 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
    • 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
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/02—Layered products essentially comprising sheet glass, or glass, slag, or like fibres in the form of fibres or filaments
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin 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
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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 form; Layered products having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • 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 form; Layered products 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 form; Layered products 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 form; Layered products 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 form; Layered products 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 form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/18—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by an internal layer formed of separate pieces of material which are juxtaposed side-by-side
    • 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 form; Layered products 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 form; Layered products 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
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • 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
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/025—Polyolefin
    • 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
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • 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
    • 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
    • B32B2307/302—Conductive
    • 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
    • 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
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • 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
    • B32B2307/70—Other properties
    • B32B2307/712—Weather resistant
    • 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
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • 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
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
    • 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
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7244—Oxygen barrier
    • 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
    • B32B2419/00—Buildings or parts thereof
    • 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
    • E04B2001/7691—Heat reflecting layers or coatings

Definitions

  • the present invention relates to insulation sheeting and has particular but not exclusive application for insulating buildings and other structures.
  • Insulation sheeting having a plastic bubble layer and outer reflective foil layers has been used to insulate buildings.
  • the plastic bubble layer serves to reduce the amount of heat transferred from one side to the other.
  • the reflective foil layer serves to reflect heat from the surface thereby preventing transmission of the heat.
  • the reflective foil insulation sheeting of Australian innovation patent 200410339 has a layer of scrim bonded to the foil layer. Scrim is a woven layer of material and is expensive to manufacture. The scrim layer provides support for the aluminum foil during the manufacture of the foil layer. The resultant foil layer has a plurality of dimples formed between the weave during manufacture. The dimpled foil layer however, is less efficient in reflecting heat than a non-dimpled foil layer. The loss in the ability to reflect heat and the comparatively high cost of scrim is a disadvantage in providing efficient and affordable insulation sheeting. OBJECT OF THE INVENTION
  • It is an object of the present invention is to provide an alternative insulation sheeting that overcomes at least in part one or more of the above mentioned problems.
  • the present invention broadly resides in insulation sheeting including a first polyethylene layer; one or more closed air cell layers disposed adjacent the first polyethylene layer; a second polyethylene layer disposed adjacent the closed air cell layer and located on an opposite side of the closed air cell layer relative to the first polyethylene layer; a reflective layer disposed adjacent the second polyethylene layer, wherein the reflective layer includes a plurality of substantially parallel elongate members to support the reflective layer during manufacture.
  • the present invention broadly resides in insulation sheeting including a first polyethylene layer; one or more closed air cell layers disposed adjacent the first polyethylene layer; a second polyethylene layer disposed adjacent the closed air cell layer and located on an opposite side of the closed air cell layer relative to the first polyethylene layer; a reflective layer disposed adjacent the second polyethylene layer; and an outer protective layer disposed adjacent the reflective layer, wherein the reflective layer includes a plurality of substantially parallel elongate members to support the reflective layer during manufacture.
  • the present invention broadly resides in insulation sheeting including a first reflective layer; a first polyethylene layer disposed adjacent the first reflective layer; one or more closed air cell layers disposed adjacent the first polyethylene layer; a second polyethylene layer disposed adjacent the closed air cell layer and located on an opposite side of the closed air cell layer relative to the first polyethylene layer; a second reflective layer disposed adjacent the second polyethylene layer; and an outer protective layer disposed adjacent the second reflective layer, wherein each of the first and second reflective layers includes a plurality of substantially parallel elongate members to support the reflective layer during manufacture.
  • the reflective layer is preferably a metal foil layer or a metalised polyester layer.
  • the metal foil layer is preferably an aluminium foil layer.
  • the closed air cell layer is preferably a layer that contains air pockets or bubbles produced from polyethylene. More preferably, the closer air cell layer has bubbles formed by polyethylene and the bubbles are covered by a top polyethylene layer and a base polyethylene layer.
  • the plurality of substantially parallel elongate members is preferably a series of parallel strings.
  • the strings may consist of synthetic or natural fiber.
  • the synthetic fiber may be fiberglass or nylon.
  • the natural fiber may be rice husk fiber or other natural materials.
  • Each of the first polyethylene layer and the second polyethylene layer preferably includes a relatively thick polyethylene layer that combines the sub-layers of a polyethylene tie layer and a polyethylene layer.
  • each of the first polyethylene layer and the second polyethylene layer is between 10 to 60 microns.
  • Each of the first polyethylene layer and the second polyethylene layer preferably includes a fire retardant.
  • the closed air cell layer preferably includes a fire retardant.
  • the fire retardant may be a halogen fire retardant but is preferably of a non halogen nature.
  • each of the first polyethylene layer and the second polyethylene layer includes a mould inhibitor.
  • the closed air cell layer preferably also includes a mould inhibitor.
  • each of the first polyethylene layer and the second polyethylene layer includes the fire retardant and the mould inhibitor.
  • the first polyethylene layer, the second polyethylene layer or the closed air cell layer preferably include a fire retardant and or a mould inhibitor.
  • the closed air cell layer, the first polyethylene layer and the second polyethylene layer are preferably produced from low density polyethylene.
  • the bubbles of the closed air cell layer preferably have a diameter between about 5 mm and 40 mm and a depth between about 1 mm and 15 mm.
  • the bubbles have a diameter between 22 mm and 35 mm and a depth between 8 mm and 15 mm. More preferably the bubbles have a diameter of approximately 32 mm and a depth of approximately 12 mm.
  • the bubbles have a diameter of about 20 mm and a depth of about 6 mm.
  • the outer protective layer is preferably impermeable to prevent the second reflective layer from oxidizing.
  • the outer protective layer is preferably impermeable to oxygen or corrosive residues.
  • the outer protective layer is a plastic layer or of other barrier material.
  • the outer protective layer may contain a colouring agent to assist in the reduction of glare reflected from a top side of the second reflective layer.
  • the second reflective layer preferably has a lower side that is made less reflective to absorb more heat for dissipation.
  • the insulation sheeting has a thickness between 2mm and 15mm.
  • the insulation sheeting has a thickness of about 13.4 mm with a single layer of air cell bubbles having a 12mm depth.
  • the above mentioned insulation sheeting may include a foam layer.
  • the foam layer is preferably a layer of low density polyethylene or low density polypropylene micro-cell foam.
  • the foam layer has a thickness of between 2 mm and 20 mm.
  • the foam layer preferably includes the above mentioned fire retardant and or the mould inhibitor.
  • the foam layer is preferably of low density polyethylene or low density polypropylene micro-cell foam and the foam layer is disposed between the one or more closed air cell layer and the first polyethylene layer or second polyethylene layer. In one embodiment, there is a single foam layer disposed between the one or more closed air cell layers and the first polyethylene layer.
  • first foam layer disposed between the one or more closed air cell layers and the first polyethylene layer
  • second foam layer disposed between the one or more closed air cell layers and the second polyethylene layer
  • the single foam layer is preferably between 2 and 10 mm thick. In the embodiment where there are two foam layers, each of the foam layers is preferably between 1 and 5 mm thick.
  • Figure 1 is a schematic diagram of a first embodiment of the insulation sheeting
  • FIG 2 is a schematic diagram of a second embodiment of the insulation sheeting.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT With reference to Figure 1 there is shown a first embodiment of the insulation sheeting 10 having a series of sequential layers consisting of a lower aluminum foil layer 11 , a lower polyethylene layer 12, a single closed air cell layer 13, an upper polyethylene layer 14, an upper aluminum foil layer 15 and an outer protective plastic layer 16.
  • the lower and upper aluminum foil layers 11 , 15 have a series of parallel strings that support the aluminum foil layers during manufacture. As the strings do not intersect, dimples in the foil layer are not formed during manufacture. As a consequence, the reflectivity of the aluminum foil layer is better than a foil layer with scrim.
  • the strings are made from either fiberglass, nylon or rice husk fibers.
  • the upper aluminum foil layer 15 has a top side and a bottom side. The top side faces outwards when the insulation sheeting 10 is installed in a building while the bottom side faces inwards toward the interior of the building. The bottom side is made less reflective so that more radiant heat is absorbed from the interior of the building and dissipated to the exterior of the building rather than being reflected back into the interior of the building.
  • the lower and upper polyethylene layers 12, 14, respectively, are made of low density polyethylene. Each of the polyethylene layers 12, 14 has a thickness between 10 and 60 microns but preferably about 25 to 30 microns and includes both a non-halogen or halogen fire retardant and preferably a mould inhibitor.
  • the closed air cell layer 13 comprises a single layer of bubbles 17 that is covered by a top layer 18 and a base layer 19.
  • the bubbles 17, top layer 18 and base layer 19 are all produced from low density polyethylene.
  • the top polyethylene layer 18 is located between the bubbles 17 and the upper polyethylene layer 14 while the base polyethylene layer 19 is located between the bubbles 17 and the lower polyethylene layer 12.
  • the bubbles have a diameter of about 32 mm and a depth of about 12 mm.
  • the outer protective plastic layer 16 is impermeable to oxygen and corrosive residues and prevents the surface of the top side of the upper aluminum foil layer 15 from weathering.
  • the outer protective plastic layer 16 has a green color to assist in the reduction of glare reflected from a top side of the upper aluminum foil layer 15.
  • the thickness of the insulation sheeting 10 is about 13.4 mm.
  • the insulation sheeting 30 has a series of sequential layers consisting of a lower aluminum foil layer 31 , a lower polyethylene layer 32, a lower foam layer 33, a single closed air cell layer 34, an upper foam layer 35, an upper polyethylene layer 36, an upper aluminum foil layer 37 and an outer protective plastic layer 38.
  • the insulation sheeting 30 is similar to the insulation sheeting 10 described above, except that insulation sheeting 30 has the two foam layers 33, 35.
  • the foam layers 33, 35 provide further insulation and also provide acoustic insulation.
  • the lower foam layer 33 is located between the closed air cell layer 34 and the lower polyethylene layer 32.
  • the upper foam layer 35 is located between the closed air cell layer 34 and the upper polyethylene layer 36.
  • Each of the foam layer 33, 35 is about 2 mm thick and is made of a low density polyethylene. Low density polypropylene micro-cell foam may alternately be used.
  • the foam layers 33, 35 include both a non-halogen or halogen fire retardant and may include a mould inhibitor.
  • An advantage of the preferred embodiment of the insulation sheeting includes having layer(s) of aluminum foil or other reflective material with a series of parallel strings thereby avoiding the use of scrim and inheriting the associated problems.
  • the parallel strings can be manufactured from fiberglass, nylon or be derived from natural fibers such as rice husk fiber.
  • a non-woven scrim layer is relatively quicker to manufacture and laminates better.
  • a further advantage of the preferred embodiment of the insulation sheeting is that the mould inhibitor in the insulation sheeting reduces the growth of moulds in the insulation sheeting. Prevention of the growth of moulds is particularly advantageous in the more humid environment of tropical climates.
  • Another advantage of the preferred embodiment of the insulation sheeting is that the fire retardant in the insulation sheeting is of a non halogen nature and therefore is non toxic.

Abstract

The present invention is directed to insulation sheeting for buildings where the sheeting includes one or more closed air cell layers, polyethylene layers and one or more reflective layers. The one or more reflective layers are supported by a plurality of parallel elongate strings instead of scrim thereby increasing reflectivity and reducing the manufacturing cost of the insulation sheeting.

Description

INSULATION SHEETING
FIELD OF INVENTION
The present invention relates to insulation sheeting and has particular but not exclusive application for insulating buildings and other structures.
BACKGROUND OF THE INVENTION
Insulation sheeting having a plastic bubble layer and outer reflective foil layers has been used to insulate buildings. The plastic bubble layer serves to reduce the amount of heat transferred from one side to the other. The reflective foil layer serves to reflect heat from the surface thereby preventing transmission of the heat.
An example of reflective foil insulation sheeting has been described in Australian innovation patent 200410339. The reflective foil insulation sheeting of Australian innovation patent 200410339 has a layer of scrim bonded to the foil layer. Scrim is a woven layer of material and is expensive to manufacture. The scrim layer provides support for the aluminum foil during the manufacture of the foil layer. The resultant foil layer has a plurality of dimples formed between the weave during manufacture. The dimpled foil layer however, is less efficient in reflecting heat than a non-dimpled foil layer. The loss in the ability to reflect heat and the comparatively high cost of scrim is a disadvantage in providing efficient and affordable insulation sheeting. OBJECT OF THE INVENTION
It is an object of the present invention is to provide an alternative insulation sheeting that overcomes at least in part one or more of the above mentioned problems.
SUMMARY OF THE INVENTION
In one aspect the present invention broadly resides in insulation sheeting including a first polyethylene layer; one or more closed air cell layers disposed adjacent the first polyethylene layer; a second polyethylene layer disposed adjacent the closed air cell layer and located on an opposite side of the closed air cell layer relative to the first polyethylene layer; a reflective layer disposed adjacent the second polyethylene layer, wherein the reflective layer includes a plurality of substantially parallel elongate members to support the reflective layer during manufacture.
In a further aspect the present invention broadly resides in insulation sheeting including a first polyethylene layer; one or more closed air cell layers disposed adjacent the first polyethylene layer; a second polyethylene layer disposed adjacent the closed air cell layer and located on an opposite side of the closed air cell layer relative to the first polyethylene layer; a reflective layer disposed adjacent the second polyethylene layer; and an outer protective layer disposed adjacent the reflective layer, wherein the reflective layer includes a plurality of substantially parallel elongate members to support the reflective layer during manufacture.
In another aspect the present invention broadly resides in insulation sheeting including a first reflective layer; a first polyethylene layer disposed adjacent the first reflective layer; one or more closed air cell layers disposed adjacent the first polyethylene layer; a second polyethylene layer disposed adjacent the closed air cell layer and located on an opposite side of the closed air cell layer relative to the first polyethylene layer; a second reflective layer disposed adjacent the second polyethylene layer; and an outer protective layer disposed adjacent the second reflective layer, wherein each of the first and second reflective layers includes a plurality of substantially parallel elongate members to support the reflective layer during manufacture.
The reflective layer is preferably a metal foil layer or a metalised polyester layer. The metal foil layer is preferably an aluminium foil layer. The closed air cell layer is preferably a layer that contains air pockets or bubbles produced from polyethylene. More preferably, the closer air cell layer has bubbles formed by polyethylene and the bubbles are covered by a top polyethylene layer and a base polyethylene layer. The plurality of substantially parallel elongate members is preferably a series of parallel strings. The strings may consist of synthetic or natural fiber. The synthetic fiber may be fiberglass or nylon. The natural fiber may be rice husk fiber or other natural materials.
Each of the first polyethylene layer and the second polyethylene layer preferably includes a relatively thick polyethylene layer that combines the sub-layers of a polyethylene tie layer and a polyethylene layer. Preferably, each of the first polyethylene layer and the second polyethylene layer is between 10 to 60 microns.
Each of the first polyethylene layer and the second polyethylene layer preferably includes a fire retardant. The closed air cell layer preferably includes a fire retardant. The fire retardant may be a halogen fire retardant but is preferably of a non halogen nature.
Preferably, each of the first polyethylene layer and the second polyethylene layer includes a mould inhibitor. The closed air cell layer preferably also includes a mould inhibitor. More preferably, each of the first polyethylene layer and the second polyethylene layer includes the fire retardant and the mould inhibitor.
The first polyethylene layer, the second polyethylene layer or the closed air cell layer preferably include a fire retardant and or a mould inhibitor.
The closed air cell layer, the first polyethylene layer and the second polyethylene layer are preferably produced from low density polyethylene. The bubbles of the closed air cell layer preferably have a diameter between about 5 mm and 40 mm and a depth between about 1 mm and 15 mm.
In a preferred embodiment, the bubbles have a diameter between 22 mm and 35 mm and a depth between 8 mm and 15 mm. More preferably the bubbles have a diameter of approximately 32 mm and a depth of approximately 12 mm.
In an alternative embodiment, the bubbles have a diameter of about 20 mm and a depth of about 6 mm.
The outer protective layer is preferably impermeable to prevent the second reflective layer from oxidizing. The outer protective layer is preferably impermeable to oxygen or corrosive residues. Preferably, the outer protective layer is a plastic layer or of other barrier material.
The outer protective layer may contain a colouring agent to assist in the reduction of glare reflected from a top side of the second reflective layer.
The second reflective layer preferably has a lower side that is made less reflective to absorb more heat for dissipation.
Preferably, the insulation sheeting has a thickness between 2mm and 15mm.
More preferably, the insulation sheeting has a thickness of about 13.4 mm with a single layer of air cell bubbles having a 12mm depth.
The above mentioned insulation sheeting may include a foam layer. The foam layer is preferably a layer of low density polyethylene or low density polypropylene micro-cell foam.
Preferably, the foam layer has a thickness of between 2 mm and 20 mm.
The foam layer preferably includes the above mentioned fire retardant and or the mould inhibitor. The foam layer is preferably of low density polyethylene or low density polypropylene micro-cell foam and the foam layer is disposed between the one or more closed air cell layer and the first polyethylene layer or second polyethylene layer. In one embodiment, there is a single foam layer disposed between the one or more closed air cell layers and the first polyethylene layer.
In another embodiment, there is a single foam layer disposed between the one or more closed air cell layer and the second polyethylene layer.
In yet another embodiment, there is a first foam layer disposed between the one or more closed air cell layers and the first polyethylene layer, and a second foam layer disposed between the one or more closed air cell layers and the second polyethylene layer.
In the embodiments where there is a single foam layer, the single foam layer is preferably between 2 and 10 mm thick. In the embodiment where there are two foam layers, each of the foam layers is preferably between 1 and 5 mm thick.
BRIEF DESCRIPTION OF THE DRAWINGS
In order that the present invention can be more readily understood reference will now be made to the accompanying drawings which illustrate preferred embodiments of the invention and wherein:
Figure 1 is a schematic diagram of a first embodiment of the insulation sheeting; and
Figure 2 is a schematic diagram of a second embodiment of the insulation sheeting. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT With reference to Figure 1 there is shown a first embodiment of the insulation sheeting 10 having a series of sequential layers consisting of a lower aluminum foil layer 11 , a lower polyethylene layer 12, a single closed air cell layer 13, an upper polyethylene layer 14, an upper aluminum foil layer 15 and an outer protective plastic layer 16.
The lower and upper aluminum foil layers 11 , 15 have a series of parallel strings that support the aluminum foil layers during manufacture. As the strings do not intersect, dimples in the foil layer are not formed during manufacture. As a consequence, the reflectivity of the aluminum foil layer is better than a foil layer with scrim.
The strings are made from either fiberglass, nylon or rice husk fibers. The upper aluminum foil layer 15 has a top side and a bottom side. The top side faces outwards when the insulation sheeting 10 is installed in a building while the bottom side faces inwards toward the interior of the building. The bottom side is made less reflective so that more radiant heat is absorbed from the interior of the building and dissipated to the exterior of the building rather than being reflected back into the interior of the building. The lower and upper polyethylene layers 12, 14, respectively, are made of low density polyethylene. Each of the polyethylene layers 12, 14 has a thickness between 10 and 60 microns but preferably about 25 to 30 microns and includes both a non-halogen or halogen fire retardant and preferably a mould inhibitor.
The closed air cell layer 13 comprises a single layer of bubbles 17 that is covered by a top layer 18 and a base layer 19. The bubbles 17, top layer 18 and base layer 19 are all produced from low density polyethylene. The top polyethylene layer 18 is located between the bubbles 17 and the upper polyethylene layer 14 while the base polyethylene layer 19 is located between the bubbles 17 and the lower polyethylene layer 12. The bubbles have a diameter of about 32 mm and a depth of about 12 mm.
The outer protective plastic layer 16 is impermeable to oxygen and corrosive residues and prevents the surface of the top side of the upper aluminum foil layer 15 from weathering. The outer protective plastic layer 16 has a green color to assist in the reduction of glare reflected from a top side of the upper aluminum foil layer 15. The thickness of the insulation sheeting 10 is about 13.4 mm.
With reference to Figure 2, there is shown a second embodiment of the insulation sheeting 30. The insulation sheeting 30 has a series of sequential layers consisting of a lower aluminum foil layer 31 , a lower polyethylene layer 32, a lower foam layer 33, a single closed air cell layer 34, an upper foam layer 35, an upper polyethylene layer 36, an upper aluminum foil layer 37 and an outer protective plastic layer 38. The insulation sheeting 30 is similar to the insulation sheeting 10 described above, except that insulation sheeting 30 has the two foam layers 33, 35. The foam layers 33, 35 provide further insulation and also provide acoustic insulation.
The lower foam layer 33 is located between the closed air cell layer 34 and the lower polyethylene layer 32. The upper foam layer 35 is located between the closed air cell layer 34 and the upper polyethylene layer 36. Each of the foam layer 33, 35 is about 2 mm thick and is made of a low density polyethylene. Low density polypropylene micro-cell foam may alternately be used. The foam layers 33, 35 include both a non-halogen or halogen fire retardant and may include a mould inhibitor. ADVANTAGES
An advantage of the preferred embodiment of the insulation sheeting includes having layer(s) of aluminum foil or other reflective material with a series of parallel strings thereby avoiding the use of scrim and inheriting the associated problems. The parallel strings can be manufactured from fiberglass, nylon or be derived from natural fibers such as rice husk fiber. A non-woven scrim layer is relatively quicker to manufacture and laminates better.
A further advantage of the preferred embodiment of the insulation sheeting is that the mould inhibitor in the insulation sheeting reduces the growth of moulds in the insulation sheeting. Prevention of the growth of moulds is particularly advantageous in the more humid environment of tropical climates.
Another advantage of the preferred embodiment of the insulation sheeting is that the fire retardant in the insulation sheeting is of a non halogen nature and therefore is non toxic.
VARIATIONS
It will of course be realised that while the foregoing has been given by way of illustrative example of this invention, all such and other modifications and variations thereto as would be apparent to persons skilled in the art are deemed to fall within the broad scope and ambit of this invention as is herein set forth.
Throughout the description and claims this specification the word "comprise" and variations of that word such as "comprises" and "comprising", are not intended to exclude other additives, components, integers or steps.

Claims

1. Insulation sheeting including a first polyethylene layer; one or more closed air cell layers disposed adjacent the first polyethylene layer; a second polyethylene layer disposed adjacent the closed air cell layer and located on an opposite side of the closed air cell layer relative to the first polyethylene layer; a reflective layer disposed adjacent the second polyethylene layer, wherein the reflective layer includes a plurality of substantially parallel elongate members to support the reflective layer during manufacture.
2. Insulation sheeting including a first polyethylene layer; one or more closed air cell layers disposed adjacent the first polyethylene layer; a second polyethylene layer disposed adjacent the closed air cell layer and located on an opposite side of the closed air cell layer relative to the first polyethylene layer; a reflective layer disposed adjacent the second polyethylene layer; and an outer protective layer disposed adjacent the reflective layer, wherein the reflective layer includes a plurality of substantially parallel elongate members to support the reflective layer during manufacture.
3. Insulation sheeting including a first reflective layer; a first polyethylene layer disposed adjacent the first reflective layer; one or more closed air cell layers disposed adjacent the first polyethylene layer; a second polyethylene layer disposed adjacent the closed air cell layer and located on an opposite side of the closed air cell layer relative to the first polyethylene layer; a second reflective layer disposed adjacent the second polyethylene layer; and an outer protective layer disposed adjacent the second reflective layer, wherein each of the first and second reflective layers includes a plurality of substantially parallel elongate members to support the reflective layer during manufacture.
4. Insulation sheeting as claimed in claim any one of the preceding claims wherein the plurality of substantially parallel elongate members is a series of parallel strings of synthetic or natural fiber and the reflective layer is of metal foil or metalised polyester.
5. Insulation sheeting as claimed in claim any one of the preceding claims wherein the reflective layer is of metal foil being an aluminum foil.
6. Insulation sheeting as claimed in any one of the preceding claims wherein the first polyethylene layer, the second polyethylene layer or the closed air cell layer includes a fire retardant and or a mould inhibitor.
7. Insulation sheeting as claimed in any one of the preceding claims wherein the first polyethylene layer, the second polyethylene layer or the closed air cell layer includes a fire retardant and or a mould inhibitor, the fire retardant has a halogen or non-halogen nature.
8. Insulation sheeting as claimed in any one of the preceding claims wherein the closed cell layer has bubbles with a diameter between 22 mm and 35 mm and a depth between 8 mm and 15 mm.
9. Insulation sheeting as claimed in any one of the preceding claims wherein the closed cell layer has bubbles with a diameter of approximately 32 mm and a depth of approximately 12 mm.
10. Insulation sheeting as claimed in any one of the preceding claims wherein there is a foam layer of low density polyethylene or low density polypropylene micro- cell foam.
11. Insulation sheeting as claimed in any one of the preceding claims wherein there is a foam layer of low density polyethylene or low density polypropylene micro- cell foam, the foam layer has a thickness of between 2 mm and 20 mm.
12. Insulation sheeting as claimed in any one of the preceding claims wherein there is a foam layer of low density polyethylene or low density polypropylene micro- cell foam, the foam layer is disposed between the one or more closed air cell layer and the first polyethylene layer or second polyethylene layer.
13. Insulation sheeting as claimed in any one of the preceding claims wherein there is a foam layer of low density polyethylene or low density polypropylene micro- cell foam, wherein if there is a single foam layer the thickness of the foam layer is between 2 mm and 10 mm and if there is two foam layers the thickness is between 1 mm and 5 mm for each layer.
14. Insulation sheeting as substantially described herein with reference to and as illustrated by the accompanying drawings.
PCT/AU2007/001781 2007-11-19 2007-11-19 Insulation sheeting WO2009065163A1 (en)

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Application Number Priority Date Filing Date Title
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Publication number Priority date Publication date Assignee Title
AU2004201938B2 (en) * 2004-05-10 2010-12-02 Ptt Management Pty Ltd Insulation Sheeting
CN106476347A (en) * 2016-09-08 2017-03-08 南京航空航天大学 A kind of novel aluminium foil air sac thermal insulating layer and preparation method thereof

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US4073998A (en) * 1977-01-24 1978-02-14 Bay Mills Limited Scrim/foil laminate
US4414265A (en) * 1982-06-21 1983-11-08 Millmaster Onyx Group, Inc. Insulation board
US5393598A (en) * 1992-06-17 1995-02-28 Schlecker; Richard A. Multi-layered insulating composite fabric
US6006481A (en) * 1998-02-12 1999-12-28 Jacobs; Vance G. Insulation sheet having an integral tape strip and method of using same
US6248433B1 (en) * 1997-09-03 2001-06-19 Krona Industries Ltd. Low emissivity, high reflectivity insulation
US6814253B2 (en) * 2002-10-15 2004-11-09 Double Team Inc. Insulating sleeve for grasping container and manufacturing method

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US4073998A (en) * 1977-01-24 1978-02-14 Bay Mills Limited Scrim/foil laminate
US4414265A (en) * 1982-06-21 1983-11-08 Millmaster Onyx Group, Inc. Insulation board
US5393598A (en) * 1992-06-17 1995-02-28 Schlecker; Richard A. Multi-layered insulating composite fabric
US6248433B1 (en) * 1997-09-03 2001-06-19 Krona Industries Ltd. Low emissivity, high reflectivity insulation
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US6814253B2 (en) * 2002-10-15 2004-11-09 Double Team Inc. Insulating sleeve for grasping container and manufacturing method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2004201938B2 (en) * 2004-05-10 2010-12-02 Ptt Management Pty Ltd Insulation Sheeting
CN106476347A (en) * 2016-09-08 2017-03-08 南京航空航天大学 A kind of novel aluminium foil air sac thermal insulating layer and preparation method thereof
CN106476347B (en) * 2016-09-08 2018-06-29 南京航空航天大学 A kind of aluminium foil air sac thermal insulating layer and preparation method thereof

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