US5300357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Durably hydrophilic, thermoplastic fiber and fabric made from said fiber
Assignee: 3M Co
•
Filing: 1993-07-15
•
Granted: 1994-04-05
•
Expires: 2013-07-15
Abstract
Abstract Durably hydrophilic, thermoplastic fibers comprising thermoplastic polymer and fluoroaliphatic group-containing non-ionic compound are provided. Methods of preparation are also disclosed.
Inventors
- 👤 Robert A. Gardiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:27
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/06; A; A61; A61L; A61L15/00; A61L15/16; A61L15/20; D01F1/00; D01F1/02; D01F1/10; Y; Y10; Y10S; Y10S428/00; Y10S428/903; Y10S428/913; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/614; Y10T442/626; Y10T442/637; Y10T442/642; Y10T442/674; Y10T442/675; Y10T442/678; Y10T442/68
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
27 words
A fabric comprising durably hydrophilic, thermoplastic fiber comprising thermoplastic polymer and fluoroaliphatic group-containing non-ionic compound dispersed within said fiber and present at the surface of the fiber.
Claim 2
Dependent Claim
27 words
A fabric comprising durably hydrophilic, thermoplastic fiber comprising thermoplastic polymer and fluoroaliphatic group-containing non-ionic compound dispersed within said fiber and present at the surface of the fiber.
Claim 3
Dependent Claim
27 words
The fabric of claim 1 wherein said thermoplastic polymer is processable at a temperature below 310° C., and wherein said compound is thermally stable at said temperature.
Claim 4
Dependent Claim
27 words
The fabric of claim 1 wherein said thermoplastic polymer is normally hydrophobic and is selected from the group consisting of polyolefin, polyamide, polyester, polyurethane, and blends thereof.
Claim 5
Dependent Claim
24 words
The fabric of claim 1 wherein said fluoroaliphatic group-containing non-ionic compound is present in an amount sufficient to impart durable hydrophilicity to said surface.
Claim 6
Dependent Claim
24 words
The fabric of claim 4 wherein said fluoroaliphatic group-containing non-ionic compound is present in up to 2 weight percent based on weight of polymer.
Claim 7
Dependent Claim
16 words
The fabric of claim 4 wherein said fiber has a Hydrophilicity Index of at least 2.
Claim 8
Dependent Claim
50 words
The fabric of claim 1 wherein said fluoroaliphatic group-containing non-ionic compound is represented by the formula R.sub.f -Q-Z where R f is a saturated, mono-valent, fluoroaliphatic group comprising an alkyl group of at least 4 fully-fluorinated carbon atoms; Q is a linking group; and Z is a non-ionic water-solubilizing group.
Claim 9
Dependent Claim
11 words
The fabric of claim 7 wherein said water-solubilizing group comprises poly(oxyalkylene).
Claim 10
Dependent Claim
19 words
The fabric of claim 8 wherein said poly(oxyalkylene) is selected from the group consisting of poly(oxyethylene), poly(oxypropylene), and poly(oxyethylene-co-oxypropylene).
Claim 11
Dependent Claim
24 words
The fabric of claim 7 wherein said Q is --SO 2 N(R)--, where R is an alkyl group of 1 to 4 carbon atoms.
Claim 12
Dependent Claim
64 words
The fabric of claim 10 wherein said polymer is polypropylene, said R f is C 8 F 17 -, and said Z is selected from the group consisting of --(CH 2 CH 2 O) n R, and --CH 2 CH 2 O(CH 2 CH(CH 3 )O) n R, where n is from 6 to 9, and where R is H or CH 3 .
Claim 13
Dependent Claim
14 words
The fabric of claim 1, wherein the fiber thereof is durably hydrophilic as made.
Claim 14
Dependent Claim
12 words
The fabric of claim 1 wherein said fabric comprises a nonwoven web.
Claim 15
Dependent Claim
15 words
The hydrophilic fabric of claim 13 wherein said nonwoven web comprises a melt blown web.
Claim 16
Dependent Claim
15 words
The fabric of claim 14 wherein said melt blown web comprises a blown microfiber web.
Claim 17
Dependent Claim
63 words
A multi-layer, aqueous liquid absorbent, article comprising: a) an aqueous liquid impervious backing sheet; b) a aqueous liquid pervious topsheet; and c) an aqueous liquid absorbent layer positioned between said backing sheet and said topsheet, said absorbent layer comprising a web of durably hydrophilic, thermoplastic polymer and fluoroaliphatic group-containing non-ionic compound dispersed within said fiber and present at the surface of the fiber.
Claim 18
Dependent Claim
63 words
A multi-layer, aqueous liquid absorbent, article comprising: a) an aqueous liquid impervious backing sheet; b) a aqueous liquid pervious topsheet; and c) an aqueous liquid absorbent layer positioned between said backing sheet and said topsheet, said absorbent layer comprising a web of durably hydrophilic, thermoplastic polymer and fluoroaliphatic group-containing non-ionic compound dispersed within said fiber and present at the surface of the fiber.
References Cited (Backward Citations)
US2723999A
Cited
US2915554A
Cited
US3489148A
Cited
US3592194A
Cited
US3899563A
Cited
US3787351A
Cited
US3870567A
Cited
US3871378A
Cited
US3860003A
Cited
US3860003B1
Cited
US3860003B2
Cited
FR2271309A1
Cited
US4013671A
Cited
US4093775A
Cited
US4215205A
Cited
US4104452A
Cited
US4324246A
Cited
US4468527A
Cited
US4328279A
Cited
US4426466A
Cited
US4540497A
Cited
US4589876A
Cited
US4589876B1
Cited
US4566981A
Cited
EP0260011A2
Cited
US4857251A
Cited
US4920168A
Cited
US4855360A
Cited
US5043195A
Cited
JPH02174002A
Cited
US4933229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-04-04 | 1997-10-04 | 1998-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-04 | 2001-10-04 | 2002-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-04 | 2005-10-04 | 2006-04-05 | $7700.00 | Window Closed / Lapsed |