US4940513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing soft tissue paper treated with noncationic surfactant
Assignee: Procter and Gamble Co
•
Filing: 1988-12-05
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Granted: 1990-07-10
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Expires: 2008-12-05
Abstract
Abstract Disclosed is a process for making soft tissue paper which includes the steps of wet-laying cellulose fibers to form a web, applying to the wet web, at a fiber consistency level of from about 10% to about 80%, a noncationic surfactant, and then drying and creping the web to form the finished tissue paper. The process may further include the steps of applying an effective quantity of a binder material, such as starch, to the wet web for linting control, and to contribute tensile strength to the tissue paper.
Inventors
- 👤 Wolfgang U. Spendel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:25
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/28; D21H23/00; D21H23/02; D21H23/22; D21H23/50
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
163 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 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 noncationic surfactant such that from about 0.01% to about 2.0% of said noncationic surfactant, based on the dry fiber weight of said tissue paper, is retained by said web; (c) applying to said web, at a fiber consistency of from about 10% to about 80%, total web weight basis, a sufficient amount of a starch binder material such that from about 0.01% to about 2.0% of said starch, based on the dry fiber weight of said tissue paper, is retained by said web; and (d) drying and creping said web; wherein said tissue paper has a basis weight of from about 10 to about 65 g/m 2 and a density of less than about 0.60 g/cc.
Claim 2
Dependent Claim
163 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 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 noncationic surfactant such that from about 0.01% to about 2.0% of said noncationic surfactant, based on the dry fiber weight of said tissue paper, is retained by said web; (c) applying to said web, at a fiber consistency of from about 10% to about 80%, total web weight basis, a sufficient amount of a starch binder material such that from about 0.01% to about 2.0% of said starch, based on the dry fiber weight of said tissue paper, is retained by said web; and (d) drying and creping said web; wherein said tissue paper has a basis weight of from about 10 to about 65 g/m 2 and a density of less than about 0.60 g/cc.
Claim 3
Dependent Claim
21 words
The process of claim 1, wherein from about 0.05% to about 1.0% of said noncationic surfactant is retained by said web.
Claim 4
Dependent Claim
23 words
The process of claim 1 wherein said noncationic surfactant is selected from the group consisting of anionic surfactants, nonionic surfactants, and mixtures thereof.
Claim 5
Dependent Claim
13 words
The process of claim 3 wherein said noncationic surfactant is a nonionic surfactant.
Claim 6
Dependent Claim
12 words
The process of claim 4 wherein said nonionic surfactant is an alkylglycoside.
Claim 7
Dependent Claim
19 words
The process of claim 1 wherein said noncationic surfactant has a melting point of at least about 50° C.
Claim 8
Dependent Claim
28 words
The process of claim 1, wherein said noncationic surfactant is applied to said web when said web has a fiber consistency of from about 15% to about 35%.
Claim 9
Dependent Claim
32 words
The process of claim 1 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 10
Dependent Claim
11 words
The process of claim 8 wherein said starch is amioca starch.
Claim 11
Dependent Claim
30 words
The process of claim 1 wherein said starch is applied to said web when said web has fiber consistency of from about 15 % to about 35 %. said web.
Claim 12
Dependent Claim
31 words
The process of claim 12 wherein said noncationic surfactant is an alkylglycoside, said alkylglycoside having a melting point of at least about 50° C.; and wherein said starch is amioca starch.
Claim 13
Dependent Claim
9 words
The product made by the process of claim 1.
Claim 14
Dependent Claim
9 words
The product made by the process of claim 2.
Claim 15
Dependent Claim
9 words
The product made by the process of claim 5.
Claim 16
Dependent Claim
9 words
The product made by the process of claim 7.
Claim 17
Dependent Claim
9 words
The product made by the process of claim 8.
Claim 18
Dependent Claim
9 words
The product made by the process of claim 11.
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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) | 1993-07-09 | 1994-01-08 | 1994-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-09 | 1998-01-08 | 1998-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-09 | 2002-01-08 | 2002-07-10 | $7700.00 | Window Closed / Lapsed |