AU726219B2 - Sarking membrane - Google Patents
Sarking membrane Download PDFInfo
- Publication number
- AU726219B2 AU726219B2 AU69037/98A AU6903798A AU726219B2 AU 726219 B2 AU726219 B2 AU 726219B2 AU 69037/98 A AU69037/98 A AU 69037/98A AU 6903798 A AU6903798 A AU 6903798A AU 726219 B2 AU726219 B2 AU 726219B2
- Authority
- AU
- Australia
- Prior art keywords
- membrane
- sarking
- backing sheet
- water
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 239000012528 membrane Substances 0.000 title claims description 37
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000003063 flame retardant Substances 0.000 claims description 4
- 239000012943 hotmelt Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 description 22
- 238000000576 coating method Methods 0.000 description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- 239000005030 aluminium foil Substances 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 239000004411 aluminium Substances 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 8
- 239000011888 foil Substances 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 6
- 239000004744 fabric Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000002759 woven fabric Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Landscapes
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
- Laminated Bodies (AREA)
Description
AUSTRALIA
Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT Applicant: RENOUF INDUSTRIES PTY. LTD.
ACN 004 714 041 Invention Title: SARKING MEMBRANE a a a. a The following statement is a full description of this invention, including the best method of performing it known to us: 2 SARKING MEMBRANE This invention relates to a sarking membrane for use in roofing construction, but which may also be used in other building environments such as in walls, floors and air conditioning duct work.
Sarking membranes are known for use in buildings and generally comprise a substrate material to which is adhered a thin layer of foil. The substrate material provides weatherproofing to prevent water from passing through the sarking membrane and the foil provides a thermal insulator.
In some sarking membranes, the substrate may be chosen to be of sufficient strength so that the sarking membrane can 15 also act as a safety membrane.
The present invention may be said to reside in a sarking membrane consisting only of: a reinforcing polymeric backing sheet having a water-resistant coating on one side and having a second side opposite said water-resistant coating, the second side having a textured surface; and a layer of foil adhered to said water-resistant coating so that the water-resistant coating is provided 25 between the layer of foil and said second side of the reinforcing backing sheet so that outer surfaces of the sarking membrane are provided by the layer of foil and the second side of the reinforcing polymeric backing sheet.
According to the present invention, forming the second surface as one of the outer surfaces of the membrane, avoids the need for an anti-glare coating on the second surface because the textured surface is less reflective than the side of the backing sheet which has the waterresistant coating. The textured second surface also provides an element of grip if a workman steps onto the second surface of the sarking membrane.
H: \Sabene\Keep\RENOUF-sarkinq-membrane-prov.doc 28/05/98 3 Preferably the reinforcing backing sheet includes a woven fabric of polymeric fibres and the textured second surface is formed by the woven fabric of polymeric fibres.
Preferably the layer of aluminium foil is bonded to the reinforced polymeric backing sheet by a hot melt fire retardant adhesive.
In one embodiment of the invention, the water-resistant coating may include fire retarding properties.
Preferably the aluminium layer is formed by a rolled aluminium foil sheet having a thickness of less than 15 microns and preferably a thickness in the range of 5 to microns. In other embodiments, the aluminium layer may be provided by vacuum deposited aluminium deposited either directly onto the polymeric backing sheet or onto a S'.substrate sheet for application to the reinforcing polymeric backing sheet. The vacuum deposited aluminium preferably has a thickness in the range 5 to 15 microns and e* preferably about 10 microns.
:In other embodiments, the layer of aluminium could be 25 adhered to the polymeric backing sheet by heating surface of the water-resistant coating so that the surface of the water-resistant coating becomes tacky and applying the aluminium to the tacky surface between a pair of nip rollers so that the aluminium is adhered by the tacky surface to the water-resistant coating.
The invention may also be said to reside in a method of manufacturing a sarking membrane comprising the steps of: adhering a layer of aluminium foil to a reinforcing polymeric backing sheet which includes a waterresistant coating on one surface and a second opposed textured surface; and H: \Sabene\Keep\RENOUF-sarking-membrane-prov.doc 28/05/98 4 wherein the layer of aluminium foil is bonded to the water-resistant coating so that the water-resistant coating is between the layer of aluminium foil and the second surface of the reinforced backing sheet.
Preferably the layer of aluminium is bonded to the reinforced backing sheet by a hot melt fire retardant adhesive.
A preferred embodiment of the invention will be described, by way of example, with reference to the accompanying drawings in which: Figure 1 is a cross-sectional view through a sarking membrane according to a preferred embodiment of the 15 invention; and Figure 2 is a view of one side of the sarking membrane of Figure 1.
With reference to Figure 1, a sarking membrane 10 is shown which comprises a layer of aluminium foil 12 which is bonded to a backing sheet 14 by a hot melt fire retardant *oo adhesive 16.
The backing sheet 14 has a water-resistant coating 20 on 25 one side and a woven fabric structure 18 forming its opposite side.
The reinforced backing sheet 14 is preferably a sheet comprising a layer of fabric 18 which forms one surface 24 of the backing sheet, having an extruded water-resistant coating 20 forming its other surface 22. Such polymeric backing sheets are known and produced by a number of manufacturers including Southcorp Textiles of Clayton, Victoria, Australia.
The fabric 18 may be woven with between 60 and 90 yarns per cm in the warp direction and 30 and 50 yarns per 10 cm H: \Sabene\Keep\RENOUF-sarking-membrane-prov.doc 28/05/98 5 in the weft direction.
As is clearly shown in Figure 1, the water-resistant coating 20, which has a shiny and slippery surface 22 is covered by the aluminium foil 12 so as to be sandwiched between the aluminium foil 12 and the layer of fabric 18 of the backing sheet 14. One surface of the sarking membrane is therefore formed by the layer of foil 12 and the other surface of the sarking membrane is provided by the surface 24 of the woven fabric 18.
As is best shown in Figure 2, the outer surface of the sarking membrane 10 provided by the surface 24 provides a generally rough textured surface formed by the woven yarns 15 30 and 32 which make up the fabric 18 of the backing sheet 14. Thus, the surface 24 is generally a rough-textured surface and therefore is less reflective than the surface 22 of the water-resistant coating 20. In view of the lower reflectivity, an anti-glare coating need not be provided on the surface 24 and furthermore, the generally rough textured surface provides more grip so that if a workman steps on the outer surface 24 of the sarking membrane, he is less likely to slip than if the surface 22 of the waterresistant coating 20 forms one of the outer surfaces of the 25 sarking membrane According to the preferred embodiment of the invention, the aluminium foil provides thermal insulation and the waterresistant coating 20 provides water-proofing so that any water falling onto the sarking membrane 10 will not pass through the sarking membrane 10 but can flow down the membrane to gutters or the like to prevent water from entering a building.
In preferred embodiments of the invention, the polymeric backing sheet 14 can be of sufficient strength so as to also enable the sarking membrane to act as a safety H: \Sabene\Keep\RENOUF-sarking-membrane-prov.doc 28/05/98 6 membrane so that if a workman loses his footing on a roof and falls onto the suitably suspended sarking membrane the sarking membrane 10 will support the workman.
In order to act as a safety membrane, the sarking membrane is placed over rafters of a building (not shown). In the case of a tiled roof, the tiles are attached to the rafters through the sarking membrane. During setting out of the roof and the actual tiling operation, there is a danger of a workman slipping from a batten or rafter onto the unsupported sarking membrane some few centimetres below.
The workman should have confidence that that the sarking membrane would support his weight so as to act as a safety membrane.
The sarking membrane preferably has the following physical properties: tensile strength in the machine direction 20 to 30 kilonewtons per metre and about 25 kilonewtons per metre; percentage elongation in the machine direction 24 to 28% kilonewtons per meter and preferably about 26%; tensile strength in the cross-direction 11 to 19 kilonewtons per metre and preferably about 15 kilonewtons 25 per metre; elongation in the cross-direction of 10 to and preferably about 13%.
In the preferred embodiment of the present invention, the water-resistant coating is formed from polyethylene which can be fire retarded as mentioned above. In other embodiments, the water-resistant coating could be formed from PVC or other suitable material.
Since modifications within the spirit and scope of the invention may readily be effected by persons skilled within the art, it is to be understood that this invention is not H:\Sabene\Keep\RENOUF-sarking-rembrane-prov. doc 28/05/98 -7 limited to the particular embodiments described by way of example hereinabove.
a. a a a. a a.
a a a a a a a. a a H: \Sabene\Keep\RENOUF-sarking-mnebrane-prov.doc 28/05/98
Claims (1)
- 9- 6) The method of claim 5 wherein the layer of alumiinium is bonded to the reinforced backing sheet by a hot melt fire retardant adhesive. Dated this 28th day of May 1998 RENOUF INDUSTRIES PTY LTD By their Patent Attorneys GRIFFITH HACK Fellows Institute of Patent **:Attorneys of Australia H: Sabenae\Keep\ RENOUF -sarking -membrane -prov. doc 28/05/98
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU69037/98A AU726219B2 (en) | 1997-06-17 | 1998-05-28 | Sarking membrane |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPO7361 | 1997-06-17 | ||
| AUPO7361A AUPO736197A0 (en) | 1997-06-17 | 1997-06-17 | Sarking membrane |
| AU69037/98A AU726219B2 (en) | 1997-06-17 | 1998-05-28 | Sarking membrane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU6903798A AU6903798A (en) | 1998-12-24 |
| AU726219B2 true AU726219B2 (en) | 2000-11-02 |
Family
ID=25635888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU69037/98A Ceased AU726219B2 (en) | 1997-06-17 | 1998-05-28 | Sarking membrane |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU726219B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0090489A2 (en) * | 1982-03-31 | 1983-10-05 | Ph Insulation Materials Limited | Laminate |
| AU6600294A (en) * | 1994-06-27 | 1994-10-06 | Csr Ltd | Laminate material |
| AU8045894A (en) * | 1993-12-14 | 1995-06-22 | Salvatore Scardigno | Weather sealing membrane |
-
1998
- 1998-05-28 AU AU69037/98A patent/AU726219B2/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0090489A2 (en) * | 1982-03-31 | 1983-10-05 | Ph Insulation Materials Limited | Laminate |
| AU8045894A (en) * | 1993-12-14 | 1995-06-22 | Salvatore Scardigno | Weather sealing membrane |
| AU6600294A (en) * | 1994-06-27 | 1994-10-06 | Csr Ltd | Laminate material |
Also Published As
| Publication number | Publication date |
|---|---|
| AU6903798A (en) | 1998-12-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| CB | Opposition lodged by |
Opponent name: TASMAN INSULATION PTY LIMITED Opponent name: AMATEK LIMITED Opponent name: CSR LIMITED |
|
| CH | Opposition withdrawn |
Opponent name: CSR LIMITED |
|
| CH | Opposition withdrawn |
Opponent name: AMATEK LIMITED |
|
| PC1 | Assignment before grant (sect. 113) |
Owner name: AMATEK LIMITED Free format text: THE FORMER OWNER WAS: RENOUF INDUSTRIES PTY. LTD. |
|
| PC1 | Assignment before grant (sect. 113) |
Owner name: INSULATION SOLUTIONS PTY LTD Free format text: THE FORMER OWNER WAS: AMATEK LIMITED |
|
| CH | Opposition withdrawn |
Opponent name: TASMAN INSULATION PTY LIMITED |
|
| FGA | Letters patent sealed or granted (standard patent) |