US4154357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous structures
Assignee: Imperial Chemical Industries Ltd
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Filing: 1978-02-14
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Granted: 1979-05-15
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Expires: 1998-02-14
Abstract
Abstract A water repellent thermally bonded fibrous structure is obtained by applying a silicone based water repellent finish to potentially adhesive conjugate fibres, forming a web from the fibres, and subjecting the web to a heat treatment to effect inter-fibre bonding.
Inventors
- 👤 Dennis R. Sheard
- 👤 Barry Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:37
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4326; D04H1/4334; D04H1/435; D04H1/54; D04H1/541; D04H1/5412; D04H1/542; D04H1/549; D04H1/55; D04H1/5414; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10T; Y10T428/00; Y10T428/28; Y10T428/2835; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2933; Y10T428/2962; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/627; Y10T442/637; Y10T442/69; Y10T442/692
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
83 words
A process for the production of a water repellent, thermally bonded, non-woven, fibrous structure comprising the steps of (a) forming a fibrous structure from fibers formed from the group of polymers consisting of polyesters and polyamides, and to which a silicone based water repellent finish, has been applied, at least 20% of the fibers comprising potentially adhesive conjugate fibers, (b) subjecting the fibrous structure to a heat treatment to effect inter-fiber bonding, and (c) causing or permitting the bonded fibrous structure to cool.
Claim 2
Dependent Claim
83 words
A process for the production of a water repellent, thermally bonded, non-woven, fibrous structure comprising the steps of (a) forming a fibrous structure from fibers formed from the group of polymers consisting of polyesters and polyamides, and to which a silicone based water repellent finish, has been applied, at least 20% of the fibers comprising potentially adhesive conjugate fibers, (b) subjecting the fibrous structure to a heat treatment to effect inter-fiber bonding, and (c) causing or permitting the bonded fibrous structure to cool.
Claim 3
Dependent Claim
22 words
A process according to claim 1 wherein at least 50% of the fibers forming the fibrous structure comprise potentially adhesive conjugate fibers.
Claim 4
Dependent Claim
17 words
A process according to claim 1 wherein the fibrous structure is formed entirely of potentially adhesive fibers.
Claim 5
Dependent Claim
21 words
A process according to claim 1 wherein the fibrous structure of step (a) is formed from crimped or potentially crimpable fibers.
Claim 6
Dependent Claim
72 words
A process for the production of a water repellent, thermally bonded, non-woven, fibrous structure comprising the steps of (a) forming a fibrous structure from fibers to which a cross-linkable, silicone based, water repellent finish has been applied, at least 20% of the fibers comprising potentially adhesive conjugate fibers, (b) subjecting the fibrous structure to a heat treatment to effect inter-fibre bonding, and (c) causing or permitting the bonded fibrous structure to cool.
Claim 7
Dependent Claim
72 words
A process for the production of a water repellent, thermally bonded, non-woven, fibrous structure comprising the steps of (a) forming a fibrous structure from fibers to which a cross-linkable, silicone based, water repellent finish has been applied, at least 20% of the fibers comprising potentially adhesive conjugate fibers, (b) subjecting the fibrous structure to a heat treatment to effect inter-fibre bonding, and (c) causing or permitting the bonded fibrous structure to cool.
Claim 8
Dependent Claim
15 words
A water repellent, thermally bonded, non-woven, fibrous structure made by the process of claim 1.
Claim 9
Dependent Claim
15 words
A water repellent, thermally bonded, non-woven, fibrous structure made by the process of claim 5.
Claim 10
Dependent Claim
78 words
A fuel tank having an external flame suppression means contiguous therewith comprising a water repellent, thermally bonded, non-woven, fibrous structure produced by the steps of (a) forming a fibrous structure from fibers to which a silicone based water repellent finish has been applied, at least 20% of the fibers comprising potentially adhesive conjugate fibers, (b) subjecting the fibrous structure to a heat treatment to effect inter-fiber bonding, and (c) causing or permitting the bonded fibrous structure to cool.
Claim 11
Dependent Claim
78 words
A fuel tank having an external flame suppression means contiguous therewith comprising a water repellent, thermally bonded, non-woven, fibrous structure produced by the steps of (a) forming a fibrous structure from fibers to which a silicone based water repellent finish has been applied, at least 20% of the fibers comprising potentially adhesive conjugate fibers, (b) subjecting the fibrous structure to a heat treatment to effect inter-fiber bonding, and (c) causing or permitting the bonded fibrous structure to cool.
Claim 12
Dependent Claim
93 words
In a process for producing a thermally bonded, non-woven, fibrous structure, comprising the steps of: (a) forming a fibrous structure from fibers formed from the group of polymers consisting of polyesters and polyamides, at least 20% of the fibers comprising potentially adhesive conjugate fibers, (b) subjecting the fibrous structure to a heat treatment to effect inter-fiber bonding; and (c) causing or permitting the bonded fibrous structure to cool, the improvement of providing a water repellant fibrous structure comprising applying to the fibers prior to heat treating step (b) a silicone-based water repellant finish.
Claim 13
Dependent Claim
93 words
In a process for producing a thermally bonded, non-woven, fibrous structure, comprising the steps of: (a) forming a fibrous structure from fibers formed from the group of polymers consisting of polyesters and polyamides, at least 20% of the fibers comprising potentially adhesive conjugate fibers, (b) subjecting the fibrous structure to a heat treatment to effect inter-fiber bonding; and (c) causing or permitting the bonded fibrous structure to cool, the improvement of providing a water repellant fibrous structure comprising applying to the fibers prior to heat treating step (b) a silicone-based water repellant finish.
References Cited (Backward Citations)
US3895151A
Cited
US4068036A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |