Patent US5300192A successfully refreshed from Google Patents.
US5300192A
Expired / Lapsed
US
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Wet laid fiber sheet manufacturing with reactivatable binders for binding particles to fibers
Assignee: Weyerhaeuser NR Co
•
Filing: 1992-08-17
•
Granted: 1994-04-05
•
Expires: 2012-08-17
Abstract
Abstract Binder is applied to fibers during the production of a web on a wet laid sheet manufacturing line. Particles are bound to fibrous material by a binder that has a volatility less than water, wherein the binder has a functional group capable of forming a hydrogen bond with the fibers, and a functional group that is capable of forming a hydrogen bond or a coordinate covalent bond with the particles. The binder may be activated or reactivated by addition of heat, liquid, or mechanical energy such that fibers treated with binder may be shipped to a distribution point before particles are bound to the fibers. The binder may be a polymeric binder selected from the group consisting of polyethylene glycol, polypropylene glycol, polyacrylic acid, polyamides and polyamines, and in which the polymeric binder has a hydrogen bonding functionality or coordinate covalent bond forming functionality on each repeating unit of the polymeric binder. Alternatively, the binder may be a non-polymeric organic binder that includes a functionality such as a carboxylic acid, an alcohol, an amino acid, an amide, and an amine, wherein there are at least two such functionalities on the molecule, which may be the same or different functionality. Particles attached to the fibers in this manner are firmly adhered and are not easily dislodged. Fibrous products produced by this method include fibers to which particles are bound and may also include other fibers.
Inventors
- 👤 Michael R. Hansen
- 👤 Richard H. Young, Sr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:24
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/02; A61F13/0203; A61F13/0206; A61F13/0209; A61F13/51; A61F13/511; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/60; D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/64; D06; D06M; D06M13/00; D06M13/10; D06M13/184; D06M13/244; D06M13/248; D06M13/256; D06M13/282; D06M13/285; D06M13/288; D06M13/292; D06M13/322; D06M13/325; D06M13/342; D06M23/00; D06M23/08; D21; D21H; D21H11/00; D21H11/16; A61F13/531; A61F13/532; A61F13/533; A61F2013/00361; A61F2013/00365; A61F2013/00463; A61F2013/00472; A61F2013/00727; A61F2013/00748; A61F2013/00902; A61F2013/0091; A61F2013/00927; A61F13/15203; A61F2013/15284; A61F2013/15422; A61F13/15577; A61F2013/15821; A61F2013/15934; A61F2013/15951; A61F2013/51002; A61F2013/51038; A61F2013/5104; A61F2013/51078; A61F2013/530007; A61F2013/530131; A61F2013/530182; A61F2013/530189; A61F2013/530437; A61F2013/530445; A61F2013/530481; A61F2013/530489; A61F2013/530496; A61F2013/53051; A61F2013/530525; A61F2013/530547; A61F2013/530554; A61F2013/530569; A61F2013/530583; A61F2013/530613; D06M2200/00; D06M2400/00; D06M2400/01; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24405; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T442/00; Y10T442/20; Y10T442/2041; Y10T442/2098; Y10T442/2107; Y10T442/2115
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
132 words
A method of producing fibers with adhered particles comprising: providing fibers that have hydrogen bonding functional sites in a wet laid fiber sheet or web manufacturing line in which the fibers are formed into a web; applying a binder to the fibers while the fibers are on the wet laid sheet manufacturing line, the binder having a volatility less than water, the binder also having a functional group that forms a hydrogen bond with the fibers and that is capable of forming a hydrogen bond or a coordinate covalent bond with particles; adding particles having a hydrogen bonding or a coordinate covalent bonding functionality to the fibers; and activating the binder from an inactive state by mechanical agitation, heat, or addition of an activating liquid, to bond the particles to the fibers.
Claim 2
Independent Claim
132 words
A method of producing fibers with adhered particles comprising: providing fibers that have hydrogen bonding functional sites in a wet laid fiber sheet or web manufacturing line in which the fibers are formed into a web; applying a binder to the fibers while the fibers are on the wet laid sheet manufacturing line, the binder having a volatility less than water, the binder also having a functional group that forms a hydrogen bond with the fibers and that is capable of forming a hydrogen bond or a coordinate covalent bond with particles; adding particles having a hydrogen bonding or a coordinate covalent bonding functionality to the fibers; and activating the binder from an inactive state by mechanical agitation, heat, or addition of an activating liquid, to bond the particles to the fibers.
Claim 3
Dependent Claim
14 words
A method according to claim 1 in which the fibers include wood pulp fibers.
Claim 4
Dependent Claim
25 words
A method according to claim 1 in which the particles are added to the fibers at a location remote from the pulp sheet manufacturing line.
Claim 5
Dependent Claim
32 words
A method according to claim 3 in which the web is dried and thereafter fiberized and in which the particles are added to the fibers contemporaneously with the fiberizing of the web.
Claim 6
Dependent Claim
26 words
A method according to claim 1 in which the particles are added to the fibers at a location remote from the wet laid sheet manufacturing line.
Claim 7
Dependent Claim
31 words
A method according to claim 1 wherein the binder is applied to the fiber web following the drying of the web at least partially on the wet laid sheet manufacturing line.
Claim 8
Dependent Claim
26 words
A method according to claim 6 in which the particles are added to the fibers at a location remote from the wet laid sheet manufacturing line.
Claim 9
Dependent Claim
91 words
A method according to claim 1 in which the binder is selected from the group consisting of (a) a polymeric binder with repeating units and with each repeating unit having a functional group capable of forming a hydrogen bond or a coordinate covalent bond with the particles, or a hydrogen bond with the fibers; and (b) a non-polymeric organic binder with a functional group capable of forming a hydrogen bond or a coordinate covalent bond with the particles, and a functional group capable of forming a hydrogen bond with the fibers.
Claim 10
Dependent Claim
12 words
A method according to claim 8 wherein the particles comprise superabsorbent particles.
Claim 11
Dependent Claim
32 words
A method according to claim 8 wherein the binder is a polymeric binder selected from the group consisting of polyethylene glycol, polypropylene glycol, polyacrylic acid, polyamides, polyamines, poly(caprolactone) diol and combinations thereof.
Claim 12
Dependent Claim
21 words
A method according to claim 8 wherein the binder is selected from the group consisting of polyacrylic acid, polyamides and polyamines.
Claim 13
Dependent Claim
21 words
A method according to claim 8 wherein the binder is selected from the group consisting of a polyamide and a polyamine.
Claim 14
Dependent Claim
37 words
A method according to claim 8 wherein the binder is a non-polymeric organic binder selected from the group consisting of a carboxylic acid, an alcohol, an amino acid, an amide, an amine, a carboxyl and combinations thereof.
Claim 15
Dependent Claim
13 words
A method according to claim 13 wherein the binder is a carboxylic acid.
Claim 16
Dependent Claim
24 words
A method according to claim 13 wherein the binder is selected from the group consisting of an amino acid, an amide, and an amine.
Claim 17
Dependent Claim
28 words
A method according to claim 13 wherein the binder is selected from the group consisting of a polycarboxylic acid, a hydroxy acid, an amino acid or a carboxyamide.
Claim 18
Dependent Claim
24 words
A method according to claim 13 wherein the binder is an alcohol selected from the group consisting of a polyol and an amino alcohol.
Claim 19
Dependent Claim
12 words
A method according to claim 13 wherein the binder is a polyamine.
Claim 20
Dependent Claim
21 words
A method according to claim 13 wherein the binder is selected from the group consisting of a hydroxyamide and a polyamide.
Claim 21
Dependent Claim
29 words
A method according to claim 13 wherein the binder is selected from the group consisting of glycerin, ascorbic acid, urea, glycine, pentaerythritol, a monosaccharide, a disaccharide, and combinations thereof.
Claim 22
Dependent Claim
21 words
A method according to claim 1 wherein the particles are selected from the group consisting of superabsorbent particles, zeolites, and antimicrobials.
Claim 23
Dependent Claim
35 words
A method according to claim 1 in which the step of providing fibers comprises the step of providing a blend of fibers having hydrogen bonding functional sites and fibers which lack hydrogen bonding functional sites.
Claim 24
Dependent Claim
24 words
The method according to claim 1 in which the step of activating the binder is performed prior to the step of adding the particles.
Claim 25
Dependent Claim
23 words
A method according to claim 1 in which the step of activating the binder is performed following the step of adding the particles.
Claim 26
Dependent Claim
24 words
A method according to claim 1 in which the step of activating the binder is performed simultaneously with the step of adding the particles.
Claim 27
Dependent Claim
24 words
The method of claim 1 wherein the step of activating the binder comprises mechanically agitating the fibers to which the binder has been applied.
Claim 28
Dependent Claim
20 words
The method of claim 1 wherein the step of activating the binder comprises adding an activating liquid to the fibers.
Claim 29
Dependent Claim
12 words
The method according to claim 27 wherein the activating liquid is water.
Claim 30
Dependent Claim
12 words
The method of claim 1 including the step of applying plural binders.
Claim 31
Dependent Claim
13 words
The method of claim 1 including the step of applying an auxiliary binder.
Claim 32
Independent Claim
207 words
A method of producing fibers with adhered particles, comprising the steps of: providing cellulose fibers in a wet laid fiber sheet or web manufacturing line in which the fibers are formed into a web; applying at least one binder to the fibers while the fibers are on the wet laid sheet manufacturing line, the binder having a volatility less than water, wherein the binder is selected from the group consisting of (a) a polymeric binder consisting of repeating units selected from the group consisting of polyethylene glycol, polypropylene glycol, polyacrylic acid, a polyamide, a polyamine, and poly(caprolactone) diol; and (b) a non-polymeric organic binder containing at least two functional groups selected from the group consisting of a carboxylic acid, an alcohol, an amino acid, an amide, an amine, an aldehyde, and a polyaldehyde, wherein the two functional groups are the same or different; allowing the binder to become dry and inactivated wherein the binder is not capable of binding particles to the fibers prior to activating the binder; adding particles that are capable of being bound to the fibers by the binder; and activating the binder from an inactive state by mechanical agitation, heat, or addition of a reactivating liquid to bond the particles to the fibers.
Claim 33
Independent Claim
207 words
A method of producing fibers with adhered particles, comprising the steps of: providing cellulose fibers in a wet laid fiber sheet or web manufacturing line in which the fibers are formed into a web; applying at least one binder to the fibers while the fibers are on the wet laid sheet manufacturing line, the binder having a volatility less than water, wherein the binder is selected from the group consisting of (a) a polymeric binder consisting of repeating units selected from the group consisting of polyethylene glycol, polypropylene glycol, polyacrylic acid, a polyamide, a polyamine, and poly(caprolactone) diol; and (b) a non-polymeric organic binder containing at least two functional groups selected from the group consisting of a carboxylic acid, an alcohol, an amino acid, an amide, an amine, an aldehyde, and a polyaldehyde, wherein the two functional groups are the same or different; allowing the binder to become dry and inactivated wherein the binder is not capable of binding particles to the fibers prior to activating the binder; adding particles that are capable of being bound to the fibers by the binder; and activating the binder from an inactive state by mechanical agitation, heat, or addition of a reactivating liquid to bond the particles to the fibers.
Claim 34
Dependent Claim
18 words
The method of claim 31 wherein the step of applying the binder comprises applying a binder comprising glycerin.
Claim 35
Dependent Claim
19 words
The method of claim 31 wherein the step of applying the binder comprises applying a binder comprising ascorbic acid.
Claim 36
Dependent Claim
18 words
The method of claim 31 wherein the step of applying the binder comprises applying a binder comprising urea.
Claim 37
Dependent Claim
18 words
The method of claim 31 wherein the step of applying the binder comprises applying a binder comprising glycine.
Claim 38
Dependent Claim
18 words
The method of claim 31 wherein the step of applying the binder comprises applying a binder comprising pentaerythritol.
Claim 39
Dependent Claim
18 words
The method of claim 31 wherein the step of applying the binder comprises applying a binder comprising monosaccharide.
Claim 40
Dependent Claim
18 words
The method of claim 31 wherein the step of applying the binder comprises applying a binder comprising disaccharide.
Claim 41
Dependent Claim
22 words
The method of claim 31 wherein the step of applying the binder comprises applying plural binders from the group of claim 31.
Claim 42
Dependent Claim
18 words
The method according to claim 31 wherein the step of activating the binder comprises adding a reactivating liquid.
Claim 43
Dependent Claim
12 words
The method according to claim 40 wherein the reactivating liquid is water.
Claim 44
Independent Claim
230 words
A method of producing fibers with adhered particles, comprising the steps of: providing cellulose fibers in a wet laid fiber sheet or web manufacturing line in which the fibers are formed into a web; applying a binder to the fibers, the binder having a volatility less than water, wherein the binder has a first functional group that is capable of forming a hydrogen bond with the fibers and a second functional group that is capable of forming a hydrogen bond or a coordinate covalent bond with particles, and the binder is capable of being reactivated from an inactive dry state in which the binder is not capable of binding particles to the fibers, to an active state in which the binder is capable of binding the particles to the fibers by the hydrogen bonds, or hydrogen bonds and coordinate covalent bonds; after applying the binder, allowing the binder to become dry and inactivated wherein the binder is not capable of binding particles to the fibers prior to activating the binder, and shipping the fibers to a remote location with the binder dry and inactivated; adding particles having a hydrogen bonding or a coordinate covalent bonding functionality to the fibers; and at the remote location, activating the binder from an inactive state by mechanical agitation or addition of a reactivating liquid, to bind the particles to the fibers by the binder.
Claim 45
Independent Claim
230 words
A method of producing fibers with adhered particles, comprising the steps of: providing cellulose fibers in a wet laid fiber sheet or web manufacturing line in which the fibers are formed into a web; applying a binder to the fibers, the binder having a volatility less than water, wherein the binder has a first functional group that is capable of forming a hydrogen bond with the fibers and a second functional group that is capable of forming a hydrogen bond or a coordinate covalent bond with particles, and the binder is capable of being reactivated from an inactive dry state in which the binder is not capable of binding particles to the fibers, to an active state in which the binder is capable of binding the particles to the fibers by the hydrogen bonds, or hydrogen bonds and coordinate covalent bonds; after applying the binder, allowing the binder to become dry and inactivated wherein the binder is not capable of binding particles to the fibers prior to activating the binder, and shipping the fibers to a remote location with the binder dry and inactivated; adding particles having a hydrogen bonding or a coordinate covalent bonding functionality to the fibers; and at the remote location, activating the binder from an inactive state by mechanical agitation or addition of a reactivating liquid, to bind the particles to the fibers by the binder.
Claim 46
Dependent Claim
44 words
The method of claim 42 further comprising the step of incorporating the fibers into a product, and the activating step comprises activating the binder in a target area on the product, wherein the target area is less than an entire area of the product.
Claim 47
Dependent Claim
27 words
The method of claim 43 wherein the product is selected from the group consisting of an absorbent pad, a bandage, a feminine hygiene appliance, and a diaper.
Claim 48
Dependent Claim
36 words
The method of claim 43 wherein the product is a diaper, the target area is the crotch of a diaper, and the particles are selected from the group consisting of superabsorber particles, antimicrobials, and odor absorbers.
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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) | 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 |