Patent US5663286A successfully refreshed from Google Patents.
US5663286A
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Nonwoven web comprising water soluble polyamides and articles constructed therefrom
Assignee: HB Fuller Co
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Filing: 1995-11-09
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Granted: 1997-09-02
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Expires: 2015-11-09
Abstract
Abstract This invention relates to a nonwoven web comprising a water soluble polyamide and articles constructed therefrom. The water soluble polyamide may be used alone or in combination with conventional thermoplastic web forming materials such as water insoluble polyethylene, polypropylene, polyester and polyamide. The water soluble polyamide may also be combined with biodegradable or selectively dispersible material to form nonwoven webs having various combinations of properties. Such water soluble webs have utility in the manufacture of disposable absorbent articles such as disposable diapers, feminine napkins, incontinent products and cellulosic articles such as tissues and towels, as well as for water soluble heat fusible webs for the textile industry.
Inventors
- 👤 Sharf U. Ahmed
- 👤 Greg J. Van Lith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:40
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/78; D01F6/82; D04; D04H; D04H13/00; A; A61; A61F; A61F13/00; A61F13/15; A61F13/15203; A61F13/15211; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/26; A61L15/42; A61L15/62; A61L31/00; A61L31/04; A61L31/06; C; C08; C08G; C08G69/00; C08G69/40; D04H1/00; D04H1/40; D04H1/42; D04H1/4326; D04H1/4334; D04H1/4374; D04H1/54; D04H3/00; D04H3/08; D04H3/16; A61F13/51; A61F13/511; A61F13/514; A61F13/53; A61F2013/530481; A61F2013/53051; A61F2013/530547; A61F2013/530554; A61F13/539; A61F2013/53908; A61F2013/53933; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
68 words
A nonwoven web comprising a water soluble polyether amide produced by reacting at least one polyalkylene glycol diamine with at least one dicarboxylic acid or ester thereof, said polyalkylene glycol diamine has the formula: NH.sub.2 --(CH.sub.2).sub.x --(OCH.sub.2 --CH.sub.2)y--O--(CH.sub.2)0.sub.x --NH.sub.2 wherein X ranges from 2 to 3 and Y ranges from 1 to 2; wherein said web is produced by spraying said water soluble polyether amide in molten form.
Claim 2
Dependent Claim
68 words
A nonwoven web comprising a water soluble polyether amide produced by reacting at least one polyalkylene glycol diamine with at least one dicarboxylic acid or ester thereof, said polyalkylene glycol diamine has the formula: NH.sub.2 --(CH.sub.2).sub.x --(OCH.sub.2 --CH.sub.2)y--O--(CH.sub.2)0.sub.x --NH.sub.2 wherein X ranges from 2 to 3 and Y ranges from 1 to 2; wherein said web is produced by spraying said water soluble polyether amide in molten form.
Claim 3
Dependent Claim
17 words
The nonwoven web of claim 1 wherein at least one of said polyalkylene glycol diamines is 4,7,10-trioxatridecane-1,13-diamine.
Claim 4
Dependent Claim
26 words
The nonwoven web of claim 1 wherein said water soluble polyether amide is produced by reacting 4,7,10-trioxatridecane-1,13-diamine with at least one dicarboxylic acid or esters thereof.
Claim 5
Dependent Claim
38 words
The nonwoven web of claim 1 further comprising at least one polymer selected from the group consisting of a biodegradable polymer, a water insoluble polymer, an alkaline dispersible polymer, a saline insoluble water dispersible polymer, and mixtures thereof.
Claim 6
Dependent Claim
25 words
The nonwoven web of claim 4 wherein said biodegradable polymer is selected from the group consisting of polylactic acid, polyhydroxybutyrate, polyhydroxybutyratevalerate, polycaprolactone, and mixtures thereof.
Claim 7
Dependent Claim
25 words
The nonwoven web of claim 4 wherein the water insoluble polymer is selected from the group consisting of polyethylene, polypropylene, polyester, polyamide and mixtures thereof.
Claim 8
Dependent Claim
21 words
The nonwoven web of claim 1 wherein said web is heat fusible at a temperature of less than about 155° C.
Claim 9
Dependent Claim
10 words
A disposable article comprising the nonwoven web of claim 1.
Claim 10
Dependent Claim
11 words
A disposable absorbent article comprising the nonwoven web of claim 4.
Claim 11
Dependent Claim
11 words
A disposable absorbent article comprising the nonwoven web of claim 6.
Claim 12
Dependent Claim
24 words
The article of claim 8 wherein said article is selected from the group consisting of disposable diapers, feminine napkins, surgical gowns, and bed pads.
Claim 13
Dependent Claim
24 words
The article of claim 9 wherein said article is selected form the group consisting of disposable diapers, feminine napkins, surgical gowns, and bed pads.
Claim 14
Dependent Claim
24 words
The article of claim 10 wherein said article is selected from the group consisting of disposable diapers, feminine napkins, surgical gowns, and bed pads.
Claim 15
Dependent Claim
11 words
A cellulosic absorbent having improved strength comprising a water soluble polyamide.
Claim 16
Dependent Claim
11 words
A cellulosic absorbent having improved strength comprising a water soluble polyamide.
Claim 17
Dependent Claim
10 words
The article of claim 14 further comprising a biodegradable polymer.
Claim 18
Dependent Claim
20 words
The article of claim 14 further comprising an alkaline dispersible polymer, a saline insoluble water dispersible polymer and mixtures thereof.
Claim 19
Dependent Claim
29 words
A flushable, disposable article comprising a nonwoven web having portions of at least one water soluble polyamide and portions of a water insoluble polymer in contact with each other.
Claim 20
Dependent Claim
29 words
A flushable, disposable article comprising a nonwoven web having portions of at least one water soluble polyamide and portions of a water insoluble polymer in contact with each other.
Claim 21
Dependent Claim
17 words
A flushable, disposable article of claim 17 wherein said water soluble polyamide portions form a continuous matrix.
Claim 22
Dependent Claim
19 words
A flushable, disposable article of claim 17 wherein said water soluble polyamide portions substantially surrounds said water-insoluble polymer portions.
Claim 23
Dependent Claim
23 words
The nonwoven web of claim 1 wherein said water soluble polyether amide is sprayed at a temperature of less than about 400° F.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2000-09-01 | 2001-03-03 | 2001-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-01 | 2005-03-03 | 2005-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-01 | 2009-03-03 | 2009-09-02 | $7700.00 | Window Closed / Lapsed |