US3973067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Short-fibered nonwoven fabrics
Assignee: Fiber Technology Corp
•
Filing: 1974-10-18
•
Granted: 1976-08-03
•
Expires: 1994-10-18
Abstract
Abstract Nonwoven fabrics of improved abrasion resistance are produced by applying to a dry-laid fibrous web an aqueous dispersion of ultra-short fibers of 50 to 300 microns in length, said ultra-short fibers being coated with a polymeric binder and being suspended in an aqueous phase which is substantially free of binder. The dry-laid fibrous web may be bonded in a separate operation, optionally with a different polymeric binder and in a discontinuous pattern.
Inventors
- 👤 Nicholas S. Newman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:08
CPC Classifications
D; D04; D04H; D04H5/00; D04H5/04; D04H1/00; D04H1/40; D04H1/42; D04H1/425; D04H1/4258; D04H1/4374; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T442/00; Y10T442/60; Y10T442/681
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
112 words
An abrasion-resistant nonwoven fabric comprising: a bonded unspun and unwoven dry-laid fibrous web, substantially free from hydrated and fibrillated fibers; at least one layer of substantially unbeaten and unhydrated ultra-short cellulosic fibers of between 50 and 300 microns in length adherent to at least one face of said web, said ultra-short fibers being coated with a first acrylic polymeric binder and said fibers in said web being bonded discontinuously along their length with substantial portions of their length being free of bonding agents by a second polymeric binder, said second polymeric binder being a different and firmer acrylic binder than said first binder and having more crosslinkage therein than said first binder.
Claim 2
Dependent Claim
112 words
An abrasion-resistant nonwoven fabric comprising: a bonded unspun and unwoven dry-laid fibrous web, substantially free from hydrated and fibrillated fibers; at least one layer of substantially unbeaten and unhydrated ultra-short cellulosic fibers of between 50 and 300 microns in length adherent to at least one face of said web, said ultra-short fibers being coated with a first acrylic polymeric binder and said fibers in said web being bonded discontinuously along their length with substantial portions of their length being free of bonding agents by a second polymeric binder, said second polymeric binder being a different and firmer acrylic binder than said first binder and having more crosslinkage therein than said first binder.
Claim 3
Dependent Claim
28 words
The nonwoven fabric of claim 1 wherein the dry-laid fibrous web comprises a web of continuous filaments of a synthetic polymer with an overlay of textile-length rayon fibers.
Claim 4
Dependent Claim
28 words
The nonwoven fabric of claim 1 wherein the dry-laid fibrous web is an unspun and unwoven web of fibers of between one-quarter inch and six inches in length.
Claim 5
Dependent Claim
23 words
The nonwoven fabric of claim 1 wherein the dry-laid web comprises unbeaten and non-fibrillated fibers of between 1,000 and 5,000 microns in length.
Claim 6
Dependent Claim
38 words
The nonwoven fabric of claim 1 wherein the dry-laid web comprises a mixture of textile-length fibers of between one-quarter inch and 6 inches in length and unbeaten and non-fibrillated fibers of between 1,000 and 5,000 microns in length.
Claim 7
Dependent Claim
31 words
The nonwoven fabric of claim 2 wherein the web of continuous filaments and the overlay of rayon fibers are bonded to each other at a set of discrete and spaced-apart areas.
References Cited (Backward Citations)
US3336183A
Cited
US3462326A
Cited
US3573121A
Cited
US3669823A
Cited
US3822174A
Cited
US3853608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |