Patent EP0347153A2 successfully refreshed from Google Patents.
EP0347153A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for preparing soft tissue paper treated with a polysiloxane
Assignee: Procter and Gamble Co
•
Filing: 1989-06-13
•
Granted: —
•
Expires: 2009-06-13
Abstract
Abstract Disclosed is 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 Stanley Ampulski
- 👤 Wolfgang Ulrich Spendel
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 02:05
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/59; D21H23/00; D21H23/02; D21H23/22; D21H23/50
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
97 words
A process for making soft tissue paper, said process comprising the steps: a) wet-laying cellulosic fibers to form a web; b) applying to said web, at a fiber consistency of from 10% to 80%, total web weight basis, a sufficient amount of a polysiloxane compound such that from 0.004% to 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 10 to 65 g/m² and a density of less than 0.60g/cc.
Claim 2
Dependent Claim
97 words
A process for making soft tissue paper, said process comprising the steps: a) wet-laying cellulosic fibers to form a web; b) applying to said web, at a fiber consistency of from 10% to 80%, total web weight basis, a sufficient amount of a polysiloxane compound such that from 0.004% to 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 10 to 65 g/m² and a density of less than 0.60g/cc.
Claim 3
Dependent Claim
19 words
A process according to claim 1, wherein from 0.004% to 0.3% of said polysiloxane is retained by said web.
Claim 4
Dependent Claim
53 words
A process according to either one of claims 1 and 2 wherein said polysiloxane is polydimethylpolysiloxane having a hydrogen bonding functional group selected from 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 20% or less.
Claim 5
Dependent Claim
28 words
A process according to claim 3 wherein said polysiloxane has a molar percentage of substitution of 10% or less, and a viscosity of 25 x 10⁻⁶m²S⁻¹ or more.
Claim 6
Dependent Claim
43 words
A process according to either one of claims 3 and 4 wherein said polysiloxane has a molar percentage of substitution of from 1.0% to 5%, preferably approximately 2% and a viscosity of from 25 x 10⁻⁶m²S⁻¹ to 20m²S⁻¹, preferably approximately 125 x 10⁻⁶m²S⁻¹.
Claim 7
Dependent Claim
29 words
A process according to any one of claims 1-5 wherein said polysiloxane is applied to said web when said web has a fiber consistency of from 15% to 35%.
Claim 8
Dependent Claim
68 words
A process according to any one of claims 1-6, further comprising the step of applying to said web, at a fiber consistency of from 10% to 80%, total web weight basis, a sufficient amount of a water soluble surfactant such that from 0.01% to 2.0%, preferably from 0.05% to 1.0% of said surfactant, based on the dry fiber weight of said tissue paper, is retained by said web.
Claim 9
Dependent Claim
11 words
A process according to claim 7 wherein said surfactant is noncationic.
Claim 10
Dependent Claim
14 words
A process according to claim 8 wherein said noncationic surfactant is a nonionic surfactant.
Claim 11
Dependent Claim
20 words
A process according to any one of claims 7-9 wherein said surfactant has a melting point of at least 50°C.
Claim 12
Dependent Claim
65 words
A process according to any one of claims 1-10 further comprising the step of applying to said web, at a fiber consistency of from 10% to 80%, total web weight basis, a sufficient amount of binder such that from 0.01% to 2.0% preferably from 0.1% to 1.0% of said binder, based on the dry fiber weight of said tissue paper, is retained by said web.
Claim 13
Dependent Claim
14 words
A process according to claim 11 wherein said binder is starch, preferably amioca starch.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.