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Synthetic water-dispersible fiber
Assignee: Invista North America LLC
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Filing: 1986-03-27
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Granted: 1987-11-17
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Expires: 2006-03-27
Abstract
Abstract Water-dispersible synthetic fiber of scalloped-oval cross-section to promote dispersibility, and so better uniformity, softer feel and more opacity to the resulting wet-laid fabrics.
Inventors
- 👤 John T. Clark
- 👤 Donald A. Shiffler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:16
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/20; D21H5/207; D01; D01D; D01D5/00; D01D5/253; D01F; D01F6/00; D01F6/58; D01F6/62; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/507; D21H13/00; D21H13/10; D21H13/20; D21H13/24; D06M2101/00; D06M2101/16; D06M2101/30; D06M2101/32; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T428/2907; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/2973; Y10T428/298
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
25 words
Water-dispersible polyester fiber provided with a water-dispersing coating in sufficient amount to render the fiber water-dispersible, characterized in that the fibers are of scalloped-oval cross-section.
Claim 2
Dependent Claim
25 words
Water-dispersible polyester fiber provided with a water-dispersing coating in sufficient amount to render the fiber water-dispersible, characterized in that the fibers are of scalloped-oval cross-section.
Claim 3
Dependent Claim
16 words
Fiber as claimed in claim 1, wherein the denier is from about 0.5 to about 20.
Claim 4
Dependent Claim
16 words
Fiber as claimed in claim 1, of cut length from about 5 to about 90 mm.
Claim 5
Dependent Claim
17 words
Fiber as claimed in claim 3, wherein the length/diameter ratio is from about 100:1 to about 2000:1.
Claim 6
Dependent Claim
16 words
Water-dispersible fiber as claimed in claim 4, in the form of a package of cut fiber.
Claim 7
Dependent Claim
11 words
Polyester fiber according to claim 1, consisting essentially of poly(ethylene terephthalate).
Claim 8
Dependent Claim
42 words
Polyester fiber according to claim 1, coated with a water-dispersible coating consisting essentially of a segmented copolyester of poly(ethylene terephthalate) repeat units and poly(oxyalkylene) groups derived from a poly(oxyalkylene) glycol having an average molecular weight in the range of 300 to 6000.
Claim 9
Dependent Claim
20 words
Polyester filaments essentially as claimed in claim 7, except that they are in the form of a continuous filamentary tow.
Claim 10
Dependent Claim
179 words
Water-dispersible fiber according to claim 1, wherein the scalloped-oval cross-section is characterized as follows: a. by major and minor axes of symmetry which are perpendicular to each other; b. by a ratio of length A to width B, measured along the axes of symmetry, of from 1.4 to 2.4; c. by a lobe located on each extremity of the major axis which has a tip radius ratio r 1 /R of 0.20 to 0.45, where r 1 is the radius of the lobe tip and R is the radius of a circle circumscribed about the oblong cross section; d. by a tip radius ratio r 2 /R at each extremity of the minor axis of 0.8 to 2.1 times the tip radius ratio r 1 /R of the lobes on the major axis; e. by indentations between the extremities of the major and minor axes, and; f. by the shortest distance d between two indentations on opposite sides of the major axis being from 1.2 to 2.0 times the radius r 1 of the lobes on the major axis.
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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) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |