EP0288257A2
Expired / Lapsed
EP
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Flexible membranes
Assignee: BRITISH SISALKRAFT Ltd
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Filing: 1988-04-20
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Granted: —
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Expires: 2008-04-20
Abstract
Abstract A flexible membrane for use in a lining for a roof or wall for example to provide a water-excluding but air and water vapour permeable lining for a wall or roof comprises a web (10) of a material impermeable to liquid water but permeable to air and water vapour, a layer of tear-resistant fabric (12) of open structure, the web and the fabric layer being bonded together by an adhesive layer (11) which is non-soluble in water and which is discontinuous, foraminous or porous. The resulting material although flexible has a degree of stiffness.
Inventors
- 👤 Stephen Waight
- 👤 Christopher Leonard Robin Burdett
- 👤 Keith George Hyland Hills
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 08:17
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/04; B32B7/12; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B29/00; B32B29/02; B32B5/02; B32B5/022; B32B5/024; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2305/00; B32B2305/10; B32B2305/20; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/3065; B32B2307/70; B32B2307/724; B32B2307/726; B32B2307/7265; B32B2317/00; B32B2317/12; B32B2419/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
59 words
A flexible membrane having a degree of stiffness, comprising a web of a material which is impermeable to liquid water but permeable to air and water vapour, a layer of fabric of open structure, said web and said fabric layer being bonded together by an adhesive layer which is non-soluble in water and which is discontinuous, foraminous or porous.
Claim 2
Dependent Claim
59 words
A flexible membrane having a degree of stiffness, comprising a web of a material which is impermeable to liquid water but permeable to air and water vapour, a layer of fabric of open structure, said web and said fabric layer being bonded together by an adhesive layer which is non-soluble in water and which is discontinuous, foraminous or porous.
Claim 3
Dependent Claim
15 words
A membrane as claimed in claim 1, wherein the fabric is a bonded non-woven fabric.
Claim 4
Dependent Claim
15 words
A method as claimed in claim 2, wherein said fabric is a spun-bonded polypropylene fabric.
Claim 5
Independent Claim
22 words
A method as claimed in any one of claims 1 to 3, wherein said web is made from a spun-bonded polyethylene material.
Claim 6
Independent Claim
25 words
A method as claimed in any one of claims 1 to 3, wherein said web is a paper material treated with a hydrophobic wax-resin emulsion.
Claim 7
Independent Claim
24 words
A method as claimed in any one of claims 1 to 5, wherein said adhesive layer comprises a foraminous layer of a polyolefin material.
Claim 8
Independent Claim
21 words
A method as claimed in any one of claims 1 to 6, having a vapour resistance for less than 5.6 MNSg⁻¹.
Claim 9
Dependent Claim
16 words
A method as claimed in claim 7, having a vapour resistance of less than 0.6 MNSg⁻¹.
Claim 10
Independent Claim
20 words
A method as claimed in any one of claims 1 to 8, and treated with a fire-resistant or fire-retardent substance.
References Cited (Backward Citations)
No citation records indexed.
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