EP0189145A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Improvements relating to the lining of passageways
Assignee: Insituform Group Ltd
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Filing: 1986-01-17
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Granted: —
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Expires: 2006-01-17
Abstract
Abstract @ The present invention provides a material which comprises a laminate of a fibrous layer such as a felt which can be impregnated with curable synthetic resin, and bonded to the felt is a membrane comprises three layers namely an inner layer of a low softening point material bonded to the felt, a barrier layer which represents a barrier to the aggressive components of the resin such as the styrene, and an outer layer bonded to the outside of the fibrous layer to provide for the application of patches and sealing tapes by heat or solvent welding.
Inventors
- 👤 Peter Smith
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 10:55
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/16; F16L55/162; F16L55/165; F16L55/1656; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1372; Y10T428/1379; Y10T428/1383; Y10T428/31504; Y10T428/31551; Y10T428/31562; Y10T442/00; Y10T442/50; Y10T442/59
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
A laminated material comprising a fibrous layer suitable for impregnation with synthetic curable resin, and to one side of which is bonded a membrane which comprises three layers in the form of a first layer which is bonded to the fibres of the fibrous layer, a second layer which is a barrier film providing resistance to the aggresive properties of the resin, and a outer protective film to give the laminate strength and to provide a means for repairing the membrane readily in the event that it is punctured or torn.
Claim 2
Dependent Claim
91 words
A laminated material comprising a fibrous layer suitable for impregnation with synthetic curable resin, and to one side of which is bonded a membrane which comprises three layers in the form of a first layer which is bonded to the fibres of the fibrous layer, a second layer which is a barrier film providing resistance to the aggresive properties of the resin, and a outer protective film to give the laminate strength and to provide a means for repairing the membrane readily in the event that it is punctured or torn.
Claim 3
Dependent Claim
17 words
A material according to Claim 1, wherein the bonding layer comprises a low melting point thermoplastic layer.
Claim 4
Dependent Claim
26 words
A material according to Claim 1 or 2, wherein the barrier layer is a high melting point layer which presents a high barrier characteristic to styrene.
Claim 5
Dependent Claim
32 words
A material according to Claim 1, 2 or 3, wherein the outer layer is a synthetic resinous material to which patches or tapes can be sealed by a solvent or heat welding.
Claim 6
Dependent Claim
29 words
A material according to any preceding Claim, wherein the bonding layer comprises an ionomer, the barrier layer comprises nylon or ethylene vinyl alcohol and the outer layer comprises surlyn.
Claim 7
Dependent Claim
30 words
A material according to any of Claims 1 to 4, wherein the inner layer comprises polypropylene, the barrier layer comprises ethylene vinyl alcohol (EVOH) and the outer layer comprises polyurethane.
Claim 8
Dependent Claim
53 words
A material according to any preceding Claim, wherein the material is formed in to tubular form with the membrane to the outside of the tube, and the adjacent edges of the tube are connected, and at the seam there is a sealing tape sealed to the outer layer and bridging the said seam.
Claim 9
Dependent Claim
11 words
Material substantially as hereinbefore described with reference to the accompanying drawings.
Claim 10
Dependent Claim
11 words
Material substantially as hereinbefore described with reference to the accompanying drawings.
References Cited (Backward Citations)
No citation records indexed.
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