Patent US4617229A successfully refreshed from Google Patents.
US4617229A
Expired / Lapsed
US
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Non-woven fabric, a bituminous water-proofing membrane built up on it, and the use of the fabric as a carcass in such a membrane
Assignee: DEXTER NONWOVENS AB
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Filing: 1984-12-07
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Granted: 1986-10-14
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Expires: 2004-12-07
Abstract
Abstract A non-woven fabric for use as a bitumen coated and possibly bitumen impregnated carcass in a water-proofing membrane, particularly for roofs, is distinguished in that a proportion of at least 75% by weight of the fabric fibers comprise organic synthetic fibers, preferably polyester fibers, and cellulose fibers, preferably wood pulp fibers, the organic synthetic fibers constituting at least 10 and at most 90% by weight of this fiber proportion. The non-woven fabric is coated with a binder compatible with bitumen in an amount of at least 10%, preferably at least 20% of the fabric weight, the binder being selected so as to be thermally stable up to a temperature of at least 160° C. and for limiting the water transport ability of at least the cellulose fibers. The invention also includes water-proofing membranes including a carcass formed by such fabric, which is coated and possibly impregnated with bitumen. The invention also includes the use of such a non-woven fabric as the carcass in such a water-proofing membrane.
Inventors
- 👤 Leif Larsson
- 👤 Bengt Ekdahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:17
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4326; D04H1/435; D04H1/425; D04H1/58; D04H1/64; D04H1/645; D06; D06N; D06N5/00; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31815; Y10T442/00; Y10T442/20; Y10T442/2008; Y10T442/2221; Y10T442/2762; Y10T442/277
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
134 words
A non-woven fabric for use as a bitumen coated carcass in a water proofing membrane comprising fibers a proportion of at least 75% by weight of the amount of said fibers in the fabric comprising organic synthetic fibers which are heat stable up to at least 160° C. and natural cellulose fibers, the organic synthetic fibers constituting at least 10% and at most 90% by weight of said fiber proportion and the cellulose fibers constituting the remainder of said proportion, the fabric having applied to it a binder compatible with bitumen in an amount of at least 10% of the fabric weight, said binder being thermally stable up to a temperature of at least 160° C., and being selected for limiting the propensity to transport moisture, at least in respect of the cellulose fibers.
Claim 2
Dependent Claim
134 words
A non-woven fabric for use as a bitumen coated carcass in a water proofing membrane comprising fibers a proportion of at least 75% by weight of the amount of said fibers in the fabric comprising organic synthetic fibers which are heat stable up to at least 160° C. and natural cellulose fibers, the organic synthetic fibers constituting at least 10% and at most 90% by weight of said fiber proportion and the cellulose fibers constituting the remainder of said proportion, the fabric having applied to it a binder compatible with bitumen in an amount of at least 10% of the fabric weight, said binder being thermally stable up to a temperature of at least 160° C., and being selected for limiting the propensity to transport moisture, at least in respect of the cellulose fibers.
Claim 3
Dependent Claim
19 words
Fabric as claimed in claim 1 wherein said fiber proportion contains at most 80% by weight of cellulose fibers.
Claim 4
Dependent Claim
19 words
Fabric as claimed in claim 1 wherein the fiber proportion contains at least 30% by weight of cellulose fibers.
Claim 5
Dependent Claim
19 words
Fabric as claimed in claim 1 wherein the synthetic fibers and cellulose fibers are uniformly distributed in the fabric.
Claim 6
Dependent Claim
19 words
Fabric as claimed in claim 1 wherein the synthetic fibers have an average length of at least 18 mm.
Claim 7
Dependent Claim
13 words
Fabric as claimed in claim 1 wherein the synthetic fibers are polyester fibers.
Claim 8
Dependent Claim
14 words
Fabric as claimed in claim 1 wherein the cellulose fibers are wood pulp fibers.
Claim 9
Dependent Claim
23 words
Fabric as claimed in claim 1 wherein the proportion constitutes at least 85% by weight of the amount of fibers in the fabric.
Claim 10
Dependent Claim
19 words
Fabric as claimed in claim 8 wherein the proportion constitutes substantially 100% of the fiber quantity in the fabric.
Claim 11
Dependent Claim
112 words
Water-proofing membrane comprising a non-woven fabric coated with bitumen said fabric comprising fibers, a proportion of at least 75% by weight of the fiber quantity of the fabric comprising organic synthetic fibers and cellulose fibers, the organic synthetic fibers constituting at least 10% and at most 90% by weight of said fiber proportion, with the cellulose fibers constituting the remainder of said proportion, the fabric being coated with a binder compatible with bitumen in an amount of at least 10% of the fabric weight and the binder being selected to be thermally stable at least up to 160° C. and to limit the moisture transport ability of at least the cellulose fibers.
Claim 12
Dependent Claim
112 words
Water-proofing membrane comprising a non-woven fabric coated with bitumen said fabric comprising fibers, a proportion of at least 75% by weight of the fiber quantity of the fabric comprising organic synthetic fibers and cellulose fibers, the organic synthetic fibers constituting at least 10% and at most 90% by weight of said fiber proportion, with the cellulose fibers constituting the remainder of said proportion, the fabric being coated with a binder compatible with bitumen in an amount of at least 10% of the fabric weight and the binder being selected to be thermally stable at least up to 160° C. and to limit the moisture transport ability of at least the cellulose fibers.
Claim 13
Dependent Claim
22 words
Use of a non-woven fabric in accordance with claim 1, as a carrier or carcass for water proofing membrane coated with bitumen.
Claim 14
Dependent Claim
19 words
Fabric as claimed in claim 1 wherein said fiber proportion contains at most 60% by weight of cellulose fibers.
Claim 15
Dependent Claim
19 words
Fabric as claimed in claim 1 wherein the fiber proportion contains as least 40% by weight of cellulose fibers.
Claim 16
Dependent Claim
19 words
Fabric as claimed in claim 2 wherein the fiber proportion contains at least 30% by weight of cellulose fibers.
Claim 17
Dependent Claim
19 words
Fabric as claimed in claim 2 wherein the fiber proportion contains at least 40% by weight of cellulose fibers.
Claim 18
Dependent Claim
19 words
Fabric as claimed in claim 2 wherein the synthetic fibers and cellulose fibers are uniformly distributed in the fabric.
Claim 19
Dependent Claim
19 words
Fabric as claimed in claim 2 wherein the synthetic fibers have an average length of at least 18 mm.
Claim 20
Dependent Claim
13 words
Fabric as claimed in claim 2 wherein the synthetic fibers are polyester fibers.
Claim 21
Dependent Claim
14 words
Fabric as claimed in claim 2 wherein the cellulose fibers are wood pulp fibers.
Claim 22
Dependent Claim
23 words
Fabric as claimed in claim 2 wherein the proportion constitutes at least 85% by weight of the amount of fibers in the fabric.
Claim 23
Dependent Claim
16 words
The water-proofing membrane as claimed in claim 10 wherein said non-woven fabric is impregnated with bitumen.
Claim 24
Dependent Claim
15 words
The use as claimed in claim 11 wherein said non-woven fabric is impregnated with bitumen.
Claim 25
Dependent Claim
12 words
Fabric as claimed in claim 1 wherein said binder is a latex.
Claim 26
Dependent Claim
16 words
Fabric as claimed in claim 23 wherein said latex is a mixture of methylmethacrylate and ethylacrylate.
Claim 27
Dependent Claim
14 words
Fabric as claimed in claim 1 wherein said non-woven fabric is impregnated with bitumen.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-13 | 1990-04-14 | 1990-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-13 | 1994-04-14 | 1994-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-13 | 1998-04-14 | 1998-10-14 | $7700.00 | Window Closed / Lapsed |