US4188436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non woven fabrics with pattern of discrete fused areas
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1978-07-03
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Granted: 1980-02-12
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Expires: 1998-07-03
Abstract
Abstract Abrasion resistant segmentally bonded non woven fabrics prepared from very highly parallelised staple fibre webs are described wherein the bonding pattern is applied to the web in a defined manner related to the direction of fibre orientation in the webs.
Inventors
- 👤 Peter M. Ellis
- 👤 Alan Selwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:30
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/02; B32B5/022; D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D04H1/541; D04H1/5412; B29; B29C; B29C65/00; B29C65/02; B29C65/08; B29C65/083; B29C65/086; B29C66/00; B29C66/40; B29C66/41; B29C66/43; B32B27/00; B32B27/12; B32B27/34; B32B27/36; B32B5/22; B32B5/24; B32B5/26; B32B7/00; B32B7/04; B32B7/12; D04H1/5414; D04H1/542; D04H1/55; D04H1/555; D04H1/559; D04H1/70; D04H1/74; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/70; B29C66/71; B29C66/72; B29C66/729; B29C66/7294; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; B29C66/90; B29C66/95; B29C66/951; B29C66/9513; B29C66/9517; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/0854; B32B2250/00; B32B2250/20; B32B2250/24; B32B2262/00; B32B2262/02; B32B2262/0261; B32B2262/0276; B32B2305/00; B32B2305/10; B32B2305/20; B32B2305/38; B32B2367/00; B32B2377/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24826
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
120 words
Non-woven fabric comprising at least two layers of fibres bonded in a pattern of discrete fused areas, wherein the fibres in at least the outer layers exhibit a predominating direction of orientation and at least one layer includes or consists of fibres having an orientation orthogonal to the predominating direction of orientation in the outer layer or layers and the maximum distance between bonded areas at at least one surface measured in the direction of fibre orientation is not more than 10 mm and the bonded areas are so arranged that a projection of the bonded areas within this maximum distance, in the direction of fibre orientation, onto a line perpendicular to the predominating direction of fibre orientation is continuous.
Claim 2
Dependent Claim
120 words
Non-woven fabric comprising at least two layers of fibres bonded in a pattern of discrete fused areas, wherein the fibres in at least the outer layers exhibit a predominating direction of orientation and at least one layer includes or consists of fibres having an orientation orthogonal to the predominating direction of orientation in the outer layer or layers and the maximum distance between bonded areas at at least one surface measured in the direction of fibre orientation is not more than 10 mm and the bonded areas are so arranged that a projection of the bonded areas within this maximum distance, in the direction of fibre orientation, onto a line perpendicular to the predominating direction of fibre orientation is continuous.
Claim 3
Dependent Claim
31 words
A fabric according to claim 1 wherein in the projection of the bonded areas onto the perpendicular there is a small overlap at the ends of the projections of neighbouring bonds.
Claim 4
Dependent Claim
25 words
A fabric according to claim 1 wherein the minimum distance between bonded areas in the direction of fibre orientation is not less than 1 mm.
Claim 5
Dependent Claim
12 words
A fabric according to claim 1 having at least three fibre layers.
Claim 6
Dependent Claim
15 words
A fabric according to claim 4 wherein all the layers are highly oriented fibre webs.
Claim 7
Dependent Claim
16 words
A fabric according to claim 4 wherein only the surface layers are highly oriented fibre webs.
Claim 8
Dependent Claim
19 words
A fabric according to claim 4 wherein the orientation direction of fibres in the outer layers is the same.
Claim 9
Dependent Claim
21 words
A fabric according to claim 3 or claim 4 wherein orientation directions of fibres in the outer layers are substantially orthogonal.
Claim 10
Dependent Claim
32 words
A fabric according to claim 1 wherein the surface layers include or consist of thermoplastic polymeric fibres consisting of a polymer selected from the group consisting of polyesters, polyamides, copolyesters and copolyamides.
Claim 11
Dependent Claim
13 words
A fabric according to claim 9 wherein the thermoplastic fibres are bicomponent fibres.
Claim 12
Dependent Claim
100 words
A process for the production of a fabric according to claim 1 wherein at least two highly ordered fibre webs are passed through the nip of a hot calender press at least one roll of which bears a pattern of discrete lands in which the maximum distance between lands measured in the direction of fibre orientation of a surface web is not more than 10 mm and the lands are so arranged that a projection of the lands within this maximum distance, in the direction of fibre orientation, onto a line perpendicular to the direction of fibre orientation is continuous.
Claim 13
Dependent Claim
95 words
A process for the production of a fabric according to claim 1 wherein at least two highly ordered fibre webs are passed between the horn and the anvil of an ultrasonic bonding device, at least the anvil bearing a pattern of discrete lands in which the maximum distance between lands measured in the direction of fibre orientation of a surface web is not more than 10 mm and the lands are so arranged that a projection of the lands within this maximum distance onto a line perpendicular to the direction of fibre orientation is continuous.
Claim 14
Dependent Claim
95 words
A process for the production of a fabric according to claim 1 wherein at least one highly ordered fibre web is passed between the horn and the anvil of an ultrasonic bonding device, at least the anvil bearing a pattern of discrete lands in which the maximum distance between lands measured in the direction of fibre orientation of a surface web is not more than 10 mm and the lands are so arranged that a projection of the lands within this maximum distance onto a line perpendicular to the direction of fibre orientation is continuous.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-11 | 1983-08-13 | 1984-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-11 | 1987-08-13 | 1988-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-11 | 1991-08-13 | 1992-02-12 | $7700.00 | Window Closed / Lapsed |