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US5866675A
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Nonwoven web comprising water soluble polyamides and articles constructed therefrom
Assignee: HB Fuller Co
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Filing: 1997-08-29
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Granted: 1999-02-02
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Expires: 2017-08-29
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 22:20
CPC Classifications
D; D04; D04H; D04H13/00; D01; D01F; D01F6/00; D01F6/78; D01F6/82; 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: 21
Claim 1
Independent Claim
170 words
A nonwoven web comprising at least one water soluble polyether amide selected from the group consisting of: a) the reaction product of at least one dicarboxylic acid or an ester thereof, with polyalkylene glycol diamine having the formula: NH.sub.2 --(CH.sub.2).sub.3 --(OCH.sub.2 --CH.sub.2).sub.2 --O--(CH.sub.2).sub.3 --NH.sub.2 ; b) the reaction product of polyalkylene glycol diamine with at least one dicarboxylic acid or an ester thereof, and at least one monocarboxylic acid, said polyalkylene glycol diamine having the formula: NH.sub.2 --(CH.sub.2).sub.x --(OCH.sub.2 --CH.sub.2).sub.y --O--(CH.sub.2).sub.x --NH.sub.2 wherein X ranges from 2 to 3 and Y ranges from 1 to 2; c) up to about 95 wt-% of the reaction product of at least one polyalkylene glycol diamine with at least one dicarboxylic acid or an ester thereof, said polyalkylene glycol diamine having the formula: NH.sub.2 --(CH.sub.2).sub.x --(OCH.sub.2 --CH.sub.2).sub.y --O--(CH.sub.2).sub.x --NH.sub.2 wherein X ranges from 2 to 3 and Y ranges from 1 to 2; and at least one ingredient selected from the group consisting of waxes, tackifiers, crystalline polymers, monocarboxylic acids and mixtures thereof.
Claim 2
Dependent Claim
170 words
A nonwoven web comprising at least one water soluble polyether amide selected from the group consisting of: a) the reaction product of at least one dicarboxylic acid or an ester thereof, with polyalkylene glycol diamine having the formula: NH.sub.2 --(CH.sub.2).sub.3 --(OCH.sub.2 --CH.sub.2).sub.2 --O--(CH.sub.2).sub.3 --NH.sub.2 ; b) the reaction product of polyalkylene glycol diamine with at least one dicarboxylic acid or an ester thereof, and at least one monocarboxylic acid, said polyalkylene glycol diamine having the formula: NH.sub.2 --(CH.sub.2).sub.x --(OCH.sub.2 --CH.sub.2).sub.y --O--(CH.sub.2).sub.x --NH.sub.2 wherein X ranges from 2 to 3 and Y ranges from 1 to 2; c) up to about 95 wt-% of the reaction product of at least one polyalkylene glycol diamine with at least one dicarboxylic acid or an ester thereof, said polyalkylene glycol diamine having the formula: NH.sub.2 --(CH.sub.2).sub.x --(OCH.sub.2 --CH.sub.2).sub.y --O--(CH.sub.2).sub.x --NH.sub.2 wherein X ranges from 2 to 3 and Y ranges from 1 to 2; and at least one ingredient selected from the group consisting of waxes, tackifiers, crystalline polymers, monocarboxylic acids and mixtures thereof.
Claim 3
Dependent Claim
30 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 and a selectively dispersible polymer.
Claim 4
Dependent Claim
25 words
The nonwoven web of claim 2 wherein said biodegradable polymer is selected from the group consisting of polylactic acid, polyhydroxybutyrate, polyhydroxybutyrate-valerate, polycaprolactone, and mixtures thereof.
Claim 5
Dependent Claim
25 words
The nonwoven web of claim 2 wherein the water insoluble polymer is selected from the group consisting of polyethylene, polypropylene, polyester, polyamide and mixtures thereof.
Claim 6
Dependent Claim
12 words
The nonwoven web of claim 1 wherein said web is heat fusible.
Claim 7
Dependent Claim
11 words
A disposable absorbent article comprising the nonwoven web of claim 1.
Claim 8
Dependent Claim
11 words
A disposable absorbent article comprising the nonwoven web of claim 2.
Claim 9
Dependent Claim
26 words
The article of claim 6 wherein said article is selected from the group consisting of disposable diapers, feminine napkins, surgical gowns, bed pads, and incontinent devices.
Claim 10
Dependent Claim
26 words
The article of claim 7 wherein said article is selected from the group consisting of disposable diapers, feminine napkins, surgical gowns, bed pads, and incontinent devices.
Claim 11
Dependent Claim
33 words
A flushable, disposable article comprising the nonwoven web of claim 1 wherein portions of the least one water soluble polyamide and portions of the water insoluble polymer are in contact with each other.
Claim 12
Dependent Claim
17 words
A flushable, disposable article of claim 10 wherein said water soluble polyamide portions form a continuous matrix.
Claim 13
Dependent Claim
19 words
A flushable, disposable article of claim 10 wherein said water soluble polyamide portions substantially surrounds said water-insoluble polymer portions.
Claim 14
Dependent Claim
38 words
A water soluble web comprising at least one polyether amide which is the reaction product of at least one dicarboxylic acid or an ester thereof, with polyalkylene glycol diamine having the formula: NH.sub.2 --(CH.sub.2).sub.3 --(OCH.sub.2 --CH.sub.2).sub.2 --O--(CH.sub.2).sub.3 --NH.sub.2.
Claim 15
Dependent Claim
38 words
A water soluble web comprising at least one polyether amide which is the reaction product of at least one dicarboxylic acid or an ester thereof, with polyalkylene glycol diamine having the formula: NH.sub.2 --(CH.sub.2).sub.3 --(OCH.sub.2 --CH.sub.2).sub.2 --O--(CH.sub.2).sub.3 --NH.sub.2.
Claim 16
Dependent Claim
62 words
A water soluble web comprising at least one polyether amide which is the reaction product of polyalkylene glycol diamine with at least one dicarboxylic acid or an ester thereof, and at least one monocarboxylic acid, said polyalkylene glycol diamine having the formula: NH.sub.2 --(CH.sub.2).sub.x --(OCH.sub.2 --CH.sub.2).sub.y --O--(CH.sub.2).sub.x --NH.sub.2 wherein X ranges from 2 to 3 and Y ranges from 1 to 2.
Claim 17
Dependent Claim
62 words
A water soluble web comprising at least one polyether amide which is the reaction product of polyalkylene glycol diamine with at least one dicarboxylic acid or an ester thereof, and at least one monocarboxylic acid, said polyalkylene glycol diamine having the formula: NH.sub.2 --(CH.sub.2).sub.x --(OCH.sub.2 --CH.sub.2).sub.y --O--(CH.sub.2).sub.x --NH.sub.2 wherein X ranges from 2 to 3 and Y ranges from 1 to 2.
Claim 18
Dependent Claim
84 words
A water soluble web comprising up to about 99 wt-% at least one polyether amide which is the reaction product of at least one polyalkylene glycol diamine with at least one dicarboxylic acid or an ester thereof, said polyalkylene glycol diamine having the formula: NH.sub.2 --(CH.sub.2).sub.x --(OCH.sub.2 --CH.sub.2).sub.y --O--(CH.sub.2).sub.x --NH.sub.2 wherein X ranges from 2 to 3 and Y ranges from 1 to 2; and at least one ingredient selected from the group consisting of waxes, tackifiers, crystalline polymers, monocarboxylic acids and mixtures thereof.
Claim 19
Dependent Claim
84 words
A water soluble web comprising up to about 99 wt-% at least one polyether amide which is the reaction product of at least one polyalkylene glycol diamine with at least one dicarboxylic acid or an ester thereof, said polyalkylene glycol diamine having the formula: NH.sub.2 --(CH.sub.2).sub.x --(OCH.sub.2 --CH.sub.2).sub.y --O--(CH.sub.2).sub.x --NH.sub.2 wherein X ranges from 2 to 3 and Y ranges from 1 to 2; and at least one ingredient selected from the group consisting of waxes, tackifiers, crystalline polymers, monocarboxylic acids and mixtures thereof.
Claim 20
Dependent Claim
11 words
The nonwoven web of claim 1 wherein said web is non-blocking.
Claim 21
Dependent Claim
12 words
The nonwoven web of claim 1 wherein said web is humidity resistant.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2002-02-01 | 2002-08-03 | 2003-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-02-01 | 2006-08-03 | 2007-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-02-01 | 2010-08-03 | 2011-02-02 | $7700.00 | Window Closed / Lapsed |