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Process for applying chemical papermaking additives to web substrate

 Jonathan Andrew Ficke et al
A process for applying a chemical additive, such as a softener, to a fibrous web comprises the steps of: providing a fibrous web having a first side and a second side opposite to the first side; providing a chemical additive; depositing the chemical additive only to the first side of the fibrous...
Inventors: Jonathan Andrew Ficke, Kenneth Douglas Vinson
Assignee: The Procter & Gamble Company
Primary Examiner: Jose A. Fortuna

U.S. Classification
162/184; 162/158; 162/135; 162/183; 162/111; 162/164.3; 162/164.1; 162/164.6; 162/168.1; 162/168.2

International Classification
D21H 2322

View patent at USPTO

Citations

Patent NumberTitleIssue date
H1672Tissue products made from low-coarseness fibers(unknown)
4300981Layered paper having a soft and smooth velutinous surface, and method of making such paperNov 17, 1981
4874465Tissue products containing sliced fibersOct 17, 1989
5059282Soft tissue paperOct 22, 1991
5215626Process for applying a polysiloxane to tissue paperJun 1, 1993
5228954Cellulose pulps of selected morphology for improved paper strength potentialJul 20, 1993
5246545Process for applying chemical papermaking additives from a thin film to tissue paperSep 21, 1993
5264082Soft absorbent tissue paper containing a biodegradable quaternized amine-ester softening compound and a permanent wet strength resinNov 23, 1993
5405499Cellulose pulps having improved softness potentialApr 11, 1995
5487813Strong and soft creped tissue paper and process for making the same by use of biodegradable crepe facilitating compositionsJan 30, 1996
5525345Lotion composition for imparting soft, lubricious feel to tissue paperJun 11, 1996
5840403Multi-elevational tissue paper containing selectively disposed chemical papermaking additive Nov 24, 1998

Referenced by

Patent NumberTitleIssue date
6398911Modified polysaccharides containing polysiloxane moietiesJun 4, 2002
6465602Modified condensation polymers having azetidinium groups and containing polysiloxane moietiesOct 15, 2002
6517678Modified polysaccharides containing amphiphillic hydrocarbon moietiesFeb 11, 2003
6596126Modified polysaccharides containing aliphatic hydrocarbon moietiesJul 22, 2003
6607637Soft tissue paper having a softening composition containing bilayer disrupter deposited thereonAug 19, 2003
6620295Modified polysaccharides containing amphiphilic hydrocarbon moietiesSep 16, 2003
6716309Method for the application of viscous compositions to the surface of a paper web and products made therefromApr 6, 2004
6755939Soft tissue paper having a softening composition containing bilayer disrupter deposited thereonJun 29, 2004
6758943Method of making a high utility tissueJul 6, 2004
6761800Process for applying a liquid additive to both sides of a tissue webJul 13, 2004
6797117Low viscosity bilayer disrupted softening composition for tissue paperSep 28, 2004
6805965Method for the application of hydrophobic chemicals to tissue websOct 19, 2004
6855229Low viscosity bilayer disrupted softening composition for tissue paperFeb 15, 2005
6860967Tissue paper penetrated with softening lotionMar 1, 2005
6896766Paper wiping products treated with a hydrophobic additiveMay 24, 2005
6896769Modified condensation polymers containing azetidinium groups in conjunction with amphiphilic hydrocarbon moietiesMay 24, 2005
6918993Multi-ply wiping products made according to a low temperature delamination processJul 19, 2005
6949168Soft paper product including beneficial agentsSep 27, 2005
6964726Absorbent webs including highly textured surfaceNov 15, 2005
6964725Soft tissue products containing selectively treated fibersNov 15, 2005
6977026Method for applying softening compositions to a tissue productDec 20, 2005
6984290Method for applying water insoluble chemical additives with to pulp fiberJan 10, 2006
6991706Clothlike pattern densified webJan 31, 2006
7008507Non-impact printing method for applying compositions to webs and products produced therefromMar 7, 2006
7029756Soft tissue hydrophilic tissue products containing polysiloxane and having unique absorbent propertiesApr 18, 2006
7101460Soft paper product including beneficial agentsSep 5, 2006
7182837Structural printing of absorbent websFeb 27, 2007
7182837Structural printing of absorbent websFeb 27, 2007
7189307Low odor binders curable at room temperatureMar 13, 2007
7229530Method for reducing undesirable odors generated by paper hand towelsJun 12, 2007
7229529Low odor binders curable at room temperatureJun 12, 2007
7282116Paper softening compositions containing bilayer disrupterOct 16, 2007
7282116Paper softening compositions containing bilayer disrupterOct 16, 2007
7297228Process for manufacturing a cellulosic paper product exhibiting reduced malodorNov 20, 2007
7297231Binders curable at room temperature with low blockingNov 20, 2007
7306699Tissue product containing a topical composition in the form of discrete dropletsDec 11, 2007
7351308Paper products having a tropical composition applied in discrete dropletsApr 1, 2008
7361253Multi-ply wiping products made according to a low temperature delamination processApr 22, 2008
7396593Single ply tissue products surface treated with a softening agentJul 8, 2008

Claims

What is claimed is:

1. A process for applying a chemical additive to a fibrous web, the process comprising the steps of:

(a) providing a fibrous web having a first side and a second side opposite to the first side;
(b) providing a chemical additive;
(c) depositing the chemical additive only to the first side of the fibrous web;
(d) maintaining the chemical additive deposited onto the first side of the web in a transferable condition such that a ratio of an open time to a drop absorbency time less than 3.0;
(e) causing the first side of the fibrous web to contact the second side of the fibrous web thereby partially transferring the chemical additive from the first side to the second side of the fibrous web such that both the first side and the second side of the fibrous web comprise the chemical additive in a functionally sufficient amount.

2. The process according to claim 1, wherein the step (e) comprises transferal of the chemical additive from a first position on the first side of the fibrous web to a second position on the second side of the fibrous web, the second position being off-set from the first position relative to a plane of the web.

3. The process according to claim 2, further comprising a step of continuously moving the fibrous web in a machine direction.

4. The process according to claim 3, wherein the step (e) comprises continuously winding the fibrous web into a roll.

5. The process according to claim 4, wherein the second position on the second side of the fibrous web is off-set in the machine direction from the first position on the first side of the fibrous web.

6. The process according to claim 5, wherein in the step (e) the amount of the chemical additive transferred from the first side of the fibrous web to the second side of the fibrous web is such that a ratio R of a surface concentration SC2 of the chemical additive on the second side to a surface concentration SC1 of the chemical additive on the first side is at least 1:4.

7. The process according to claim 6, wherein the ratio R is at least 1:2.

8. The process according to claim 7, wherein the ratio R is about 1:1.

9. The process according to claim 6, wherein the step (c) comprises extrusion coating, spray coating, print coating or any combination thereof.

10. The process according to claim 1, wherein in the step (b) the chemical additive is selected from the group consisting of softeners, emulsions, emollients, lotions, topical medicines, soaps, anti-microbial and anti-bacterial agents, moisturizers, coatings, inks and dies, strength additives, absorbency additives, binders, opacity agents, fillers, and combinations thereof.

11. The process according to claim 10, wherein the chemical additive is a chemical softener selected from the group consisting of lubricants, plasticizers, cationic debonders, noncationic debonders, and mixtures thereof.

12. The process according to claim 11, wherein in the step (e) the functionally sufficient amount of the chemical additive is at least 20 pounds per short ton.

13. The process according to claim 12, wherein the functionally sufficient amount of the chemical additive is at least 50 pounds per short ton.

14. The process according to claim 13, wherein the functionally sufficient amount of the chemical additive is at least 90 pounds per short ton.

15. The process according to claim 10, wherein the chemical additive is a strength additive selected from the group consisting of permanent wet-strength resins, temporary wet-strength resins, dry-strength resins, and mixtures thereof.

16. The process according to claim 10, wherein the chemical additive is an absorbency additive selected from the group consisting of polyethoxylates, alkylethoxylated esters, alkylethoxylated alcohols, alkylpolyethoxylated nonylphenols, and mixtures thereof.

17. The process according to claim 1, wherein the ratio of the open time to the drop absorbency time is less than about 1.0.

18. The process according to claim 17, wherein the ratio of the open time to the drop absorbency time is less than about 0.5.

19. A process for applying a chemical additive to a fibrous web, the process comprising the steps of:

(a) providing a fibrous web having a first side and a second side opposite to the first side;
(b) providing a softening composition selected from the group consisting of lubricants, plasticizers, cationic debonders, noncationic debonders, and mixtures thereof;
(c) depositing the softening composition only to the first side of the fibrous web in the amount of at least 0.05 gram of the softening composition per square meter of the web;
(d) maintaining the softening composition disposed on the first side of the fibrous web in a transferable condition such that a ratio of an open time to a drop absorbency time less than 3.0;
(e) continuously winding the fibrous web into a roll thereby causing the first side of the fibrous web to contact the second side of the fibrous web such that the softening composition disposed on the first side is partially transferred therefrom to the second side of the web, wherein the amount of the softening composition transferred from the first side to the second side of the fibrous web is such that a ratio of a surface concentration of the chemical additive on the second side to a surface concentration of the chemical additive on the first side is at least 1:4.

20. The process according to claim 19, wherein in the step (a) at least the first side of the fibrous web comprises a first region and a second region, the first region being raised above the second region.

21. The process according to claim 20, wherein the step (c) comprises depositing the softening composition non-compressively to the first region of the first side of the fibrous web.

22. The process according to claim 21 wherein in the step (a) the fibrous web comprises a pattern-densified structure, the first region having a first density and the second region having a second density different from the first density.

23. The process according to claim 22, wherein the first density is lower than the second density.

24. The process according to claim 19, wherein the step (c) is conducted during the papermaking process.

25. The product according to claim 19, wherein the chemical softening composition comprises a quaternary ammonium compound.

Drawings