Patent US5164046A successfully refreshed from Google Patents.
US5164046A
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US
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Method for making soft tissue paper using polysiloxane compound
Assignee: Procter and Gamble Co
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Filing: 1991-05-07
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Granted: 1992-11-17
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Expires: 2011-05-07
Abstract
Abstract A process for making soft tissue paper which includes the steps of wet-laying cellulosic fibers to form a web, applying to the wet web, at a fiber consistency level of from about 10% to about 80%, a polysiloxane material, and then drying and creping the web to form the finished tissue paper. The process may further include the steps of applying an effective amount of a surfactant material to enhance softness and/or wettability control; and/or an effective amount of a binder material, such as starch, for linting control, and/or to contribute tensile strength to the tissue paper.
Inventors
- 👤 Robert S. Ampulski
- 👤 Wolfgang U. Spendel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:06
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/59; D21H23/00; D21H23/02; D21H23/22; D21H23/50; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24446; Y10T428/24455
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
157 words
A process for making soft tissue paper, said process comprising the steps of: a) wet-laying cellulosic fibers to form a web; b) applying in an aqueous carrier to said web, at a fiber consistency of from about 10% to about 80%, total web weight basis, a sufficient amount of a polysiloxane compound such that from about 0.004% to about 0.75% of said polysiloxane, based on the dry fiber weight of said tissue paper is retained by said web; and c) drying and creping said web; wherein said tissue paper has a basis weight of from about 10 to about 65 gm 2 and a density of less than about 0.60 g/cc, wherein said polysiloxane is uniformly disposed on the outwardly facing surfaces of said tissue paper, and wherein said tissue paper after aging two weeks after its manufacture has a wetting time of 2 minutes or less for the tissue paper to be completely wetted with water.
Claim 2
Dependent Claim
157 words
A process for making soft tissue paper, said process comprising the steps of: a) wet-laying cellulosic fibers to form a web; b) applying in an aqueous carrier to said web, at a fiber consistency of from about 10% to about 80%, total web weight basis, a sufficient amount of a polysiloxane compound such that from about 0.004% to about 0.75% of said polysiloxane, based on the dry fiber weight of said tissue paper is retained by said web; and c) drying and creping said web; wherein said tissue paper has a basis weight of from about 10 to about 65 gm 2 and a density of less than about 0.60 g/cc, wherein said polysiloxane is uniformly disposed on the outwardly facing surfaces of said tissue paper, and wherein said tissue paper after aging two weeks after its manufacture has a wetting time of 2 minutes or less for the tissue paper to be completely wetted with water.
Claim 3
Dependent Claim
41 words
The process of claim 1, wherein from about 0.004% to about 0.3% of said polysiloxane is retained by said web, and wherein said tissue paper after aging two weeks after its manufacture has a wetting time of 30 seconds or less.
Claim 4
Dependent Claim
52 words
The process of claim 1 wherein said polysiloxane is polydimethylpolysiloxane having a hydrogen bonding functional group selected from the groups consisting of amino, carboxyl, hydroxyl, ether, polyether, aldehyde, ketone, amide, ester, and thiol groups, said hydrogen bonding functional group being present in a molar percentage of substitution of about 20% or less.
Claim 5
Dependent Claim
28 words
The process of claim 3 wherein said polysiloxane has a molar percentage of substitution of about 10% or less, and a viscosity of about 25 centistokes or more.
Claim 6
Dependent Claim
33 words
The process of claim 3 wherein said polysiloxane has a molar percentage of substitution of from about 1.0% to about 5%, and a viscosity of from about 25 centistokes to about 20,000,000 centistokes.
Claim 7
Dependent Claim
21 words
The process of claim 3 wherein said molar percentage of substitution is about 2%, and said viscosity is about 125 centistokes.
Claim 8
Dependent Claim
16 words
The process of claim 3 wherein said hydrogen bonding functional group is an amino functional group.
Claim 9
Dependent Claim
27 words
The process of claim 1, wherein said polysiloxane is applied to said web when said web has a fiber consistency of from about 15% to about 35%.
Claim 10
Dependent Claim
63 words
The process of claim 1, further comprising the step of applying to said web, at a fiber consistency of from about 10% to about 80%, total web weight basis, a sufficient amount of a water soluble surfactant such that from about 0.01% to about 2.0% of said surfactant, based on the dry fiber weight of said tissue paper, is retained by said web.
Claim 11
Dependent Claim
28 words
The process of claim 9 wherein said quantity of said surfactant is from about 0.05% to about 1.0% based on the dry fiber weight of said tissue paper.
Claim 12
Dependent Claim
10 words
The process of claim 9 wherein said surfactant is noncationic.
Claim 13
Dependent Claim
13 words
The process of claim 11 wherein said noncationic surfactant is a nonionic surfactant.
Claim 14
Dependent Claim
18 words
The process of claim 9 wherein said surfactant has a melting point of at least about 50° C.
Claim 15
Dependent Claim
61 words
The process of claim 1, further comprising the step of applying to said web, at a fiber consistency of from about 10% to about 80%, total web weight basis, a sufficient amount of a binder such that from about 0.01% to about 2.0% of said binder, based on the dry fiber weight of said tissue paper, is retained by said web.
Claim 16
Dependent Claim
10 words
The process of claim 14 wherein said binder is starch.
Claim 17
Dependent Claim
30 words
The process of claim 15 wherein from about 0.1% to about 1.0% of said starch, based on the dry fiber weight of said tissue paper, is retained by said web.
Claim 18
Dependent Claim
11 words
The process of claim 15 wherein said starch is amioca starch.
Claim 19
Dependent Claim
61 words
The process of claim 9, further comprising the step of applying to said web, at a fiber consistency of from about 10% to about 80%, total web weight basis, a sufficient amount of a binder such that from about 0.01% to about 2.0% of said binder, based on the dry fiber weight of said tissue paper, is retained by said web.
Claim 20
Dependent Claim
16 words
The process of claim 18 wherein said surfactant is noncationic and wherein said binder is starch.
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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) | 1995-11-17 | 1996-05-18 | 1996-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-17 | 2000-05-18 | 2000-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-17 | 2004-05-18 | 2004-11-17 | $7700.00 | Window Closed / Lapsed |