Lotion-treated tissue and towel

• US 8,012,495 B2
• Filed: 12/08/2005
• Issued: 09/06/2011
• Est. Priority Date: 05/07/2002
• Status: Expired due to Fees

• Current Assignee: GPCP IP Holdings LLC
• Original Assignee: Georgia-Pacific Consumer Products LP (KOCH Industries Incorporated)
• Inventors: White, David W., Propp, Jacob H., Schuh, Brian J., Luu, Phuong V.
• Primary Examiner(s): Richter; Johann
• Assistant Examiner(s): FISHER, ABIGAIL L
• Application Number:
  US11/297,201
• Publication Number:
  US 20060110432A1
• Time in Patent Office: 2,098 Days
• Field of Search: 424/400, 424/401, 424/443, 514/846
• US Class Current: 424/400
• CPC Class Codes: A61K 47/10 Alcohols; Phenols; Salts thereof, e.g. glycerol; Polyethylene glycols [PEG]; Poloxamers; PEG/POE alkyl ethers
• CPC Class Codes: A61K 47/14 Esters of carboxylic acids, e.g. fatty acid monoglycerides, medium-chain triglycerides, parabens or PEG fatty acid esters
• CPC Class Codes: A61K 8/068 Microemulsions
• CPC Class Codes: A61K 8/345 containing more than one hydroxy group
• CPC Class Codes: A61K 8/37 Esters of carboxylic acids
• CPC Class Codes: A61K 9/1075 Microemulsions or submicron emulsions; Preconcentrates or solids thereof; Micelles, e.g. made of phospholipids or block copolymers A61K9/0026 takes precedence
• CPC Class Codes: A61K 9/7007 Drug-containing films, membranes or sheets A61K9/0041, A61K9/0043, A61K9/006, A61K9/0063 take precedence
• CPC Class Codes: A61Q 19/10 Washing or bathing preparations

Abstract

A paper towel includes: (a) a cellulosic towel web; and (b) a lotion emulsion disposed on the towel web. The lotion emulsion is substantially liquid at room temperature and includes a polar emollient and a non-polar emollient as well as a surfactant composition comprising a nonionic surfactant; wherein the emollients and surfactant composition are selected such that the lotion emulsion is immobilized on the towel web in a semi-solid or solid state and the lotion emulsion is capable of forming an aqueous gel upon contact with water. Preferably, the lotion emulsion is a waterless micro-emulsion which is also capable of forming an aqueous micro-emulsion with water.

Claims

1. A lotion-treated substrate suitable for tissue or towel comprising:

(a) a cellulosic web; and

(b) a lotion emulsion disposed on the web,

the lotion emulsion including a polar emollient and a non-polar emollient as well as a surfactant composition comprising a nonionic surfactant, the polar emollient, nonpolar emollient and surfactant composition being selected so as to be capable of forming a micro-emulsion in the absence of water;

(c) wherein the lotion emulsion is liquid at room temperature;

(d) the emollients and surfactant composition are selected such that the lotion emulsion is a stabilized micro-emulsion which undergoes a phase change to a semi-solid or solid upon contact with the fibers of the web and is thus immobilized on the web in a semi-solid or solid state; and

(e) wherein the lotion emulsion is capable of forming an aqueous gel upon contact with water.

2. The lotion-treated substrate according to claim 1, wherein the polar emollient includes a polar polyhydroxy emollient selected from propylene glycol, glycol, glycerol, sorbitol, diethylene glycol, methylene glycol, polypropylene glycol and polyethylene glycol.

3. The lotion-treated substrate according to claim 1, wherein the non-polar emollient is selected from an aromatic or linear ester, Guerbet ester, mineral oil, squalane, squalene and liquid paraffin.

4. The lotion-treated substrate according to claim 1, wherein the lotion emulsion consists predominantly, 50% by weight or more, of emollient and surfactant.

5. The lotion-treated substrate according to claim 1, wherein the surfactant composition comprises a non-ionic surfactant selected from PEG-20 methyl glucose sesquistearate, PPG-20 methyl glucose ether, PPG-20 methyl glucose ether distearate, PEG-20 methyl glucose distearate, PEG-120 methyl glucose dioleate and ethoxylated methyl glucose having from about 10 to about 20 repeating ethoxy units.

6. The lotion-treated substrate according to claim 1, wherein the surfactant composition comprises a co-surfactant.

7. The lotion-treated substrate according to claim 6, wherein the co-surfactant is a fatty alcohol selected from C₁₂-C₁₈ fatty alcohols, behenyl alcohol, iso cetyl alcohol and iso stearyl alcohol.

8. The lotion-treated substrate according to claim 1, wherein the lotion emulsion is a waterless micro-emulsion.

9. The lotion-treated substrate according to claim 1, wherein the web is treated with the lotion emulsion in an amount of from about 0.1% to about 25% by weight of the dried fiber.

10. The lotion-treated substrate according to claim 1, wherein the web is treated with the lotion emulsion in an amount of from about 0.5% to about 20% by weight of the dried fiber.

11. The lotion-treated substrate according to claim 1, wherein the lotion emulsion further comprises an anti-microbial agent.

12. The lotion-treated substrate according to claim 11, comprising an anti-microbial agent selected from:

2,4,4′

-trichloro-2′

-hydroxydiphenyl ether;

3,4,4′

-trichlorocarbanilide;

3,4,4′

-trifluoromethyl-4,4′

-d-ichlorocarbanilide;

5-chloro-2-methyl-4-isothiazolin-3-one;

iodopropynlbutylcarbamate;

8-hydroxyquinoline;

8-hydroxyquinoline citrate;

8- hydroxyquinoline sulfate;

4-chloro-3,5-xylenol;

2-bromo-2-nitropropane-1,3-diol;

butoconazole;

nystatin;

terconazole;

nitrofurantoin;

phenazopyridine;

acyclovir;

clortrimazole;

chloroxylenol;

chlorhexidine;

chlorhexidine gluconate;

miconazole;

terconazole;

butylparaben;

ethylparaben;

methylparaben;

methylchloroisothiazoline;

methylisothiazoline and mixtures thereof.

13. The lotion-treated substrate according to claim 1, wherein the lotion emulsion further comprises an additive selected from the group of fragrances, preservatives, medicinal agents, humectants, natural therapeutic oils, botanical extracts, natural or synthetic powders, and soothing agents.

14. The lotion-treated substrate according to claim 13, wherein the additive comprises a fragrance.

15. The lotion-treated substrate according to claim 1, wherein the web comprises a wet strength agent.

16. A lotion-treated substrate suitable for tissue or towel comprising:

(a) a cellulosic web;

(b) a waterless micro-emulsion which is liquid at room temperature and undergoes a phase change to a semi-solid or solid upon contact with the fibers of the web and is thus immobilized on the web in a semi-solid or solid state;

(c) wherein the waterless micro-emulsion is a stabilized micro-emulsion which consists essentially of a polar emollient, a non-polar emollient and a surfactant composition comprising a nonionic surfactant; and

(d) wherein further the waterless micro-emulsion is capable of forming an aqueous gel upon contact with water.

17. The lotion-treated substrate according to claim 16, wherein the waterless micro-emulsion comprises a polar polyhydroxy emollient selected from propylene glycol, glycol, glycerol, sorbitol, diethylene glycol, methylene glycol, polypropylene glycol and polyethylene glycol.

18. The lotion-treated substrate according to claim 16, wherein the waterless micro-emulsion comprises a non-polar emollient selected from an aromatic or linear ester, Guerbet ester, mineral oil, squalane, squalene and liquid paraffin.

19. The lotion-treated substrate according to claim 16, wherein the waterless micro-emulsion comprises a non-ionic surfactant selected from PEG-20 methyl glucose sesquistearate, PPG-20 methyl glucose ether, PPG-20 methyl glucose ether distearate, PEG-20 methyl glucose distearate, PEG-120 methyl glucose dioleate and ethoxylated methyl glucose having from about 10 to about 20 repeating ethoxy units.

20. A lotion-treated substrate suitable for tissue or towel comprising:

(a) a cellulosic web; and

(b) a waterless micro-emulsion which is liquid at room temperature and undergoes a phase change to a semi-solid or solid upon contact with the fibers of the web and is thus immobilized on the web in a semi-solid or a solid state;

wherein the micro-emulsion is a stabilized micro-emulsion which comprises a polar emollient, a non-polar emollient, a co-surfactant and a non-ionic surfactant.

21. The lotion-treated substrate according to claim 20, wherein the co-surfactant is a fatty alcohol.

22. The lotion-treated substrate according to claim 21, wherein the fatty alcohol is selected from C₁₂-C₁₈ fatty alcohols, behenyl alcohol, iso cetyl alcohol and iso stearyl alcohol.

23. A method of making a lotion-treated substrate suitable for tissue or towel comprising:

(a) preparing a lotion emulsion including a polar emollient and a non-polar emollient as well as a surfactant composition comprising a nonionic surfactant, the polar emollient, nonpolar emollient and surfactant composition being selected so as to be capable of forming a micro-emulsion in the absence of water;

(b) treating a cellulosic web with the lotion emulsion;

wherein the emollient composition and surfactant composition are further characterized such that the lotion emulsion is a stabilized micro-emulsion which undergoes a phase change to a semi-solid or solid upon contact with the fibers of the web and is thus immobilized on the towel web in a semi-solid or solid state and wherein the lotion emulsion is capable of forming an aqueous gel upon contact with water.

24. The method of making a lotion-treated substrate according to claim 23, wherein the lotion emulsion is applied to the web by way of spraying or printing.

25. The method of making a lotion-treated substrate according to claim 23, wherein the emollient composition comprises a polar polyhydroxy emollient selected from propylene glycol, glycol, glycerol, sorbitol, diethylene glycol, methylene glycol, polypropylene glycol and polyethylene glycol.

26. The method of making a lotion-treated substrate according to claim 23, wherein the emollient composition comprises a non-polar emollient selected from an aromatic or linear ester, Guerbet ester, mineral oil, squalane, squalene and liquid paraffin.

27. The method of making a lotion-treated substrate according to claim 23, wherein the surfactant composition comprises a non-ionic surfactant selected from PEG-20 methyl glucose sesquistearate, PPG-20 methyl glucose ether, PPG-20 methyl glucose ether distearate, PEG-20 methyl glucose distearate, PEG-120 methyl glucose dioleate and ethoxylated methyl glucose having from about 10 to about 20 repeating ethoxy units.

28. The method of making a lotion-treated substrate according to claim 23, wherein the surfactant composition comprises a co-surfactant selected from C₁₂-C₁₈ fatty alcohols, behenyl alcohol, iso cetyl alcohol and iso stearyl alcohol.

29. The method of making a lotion-treated substrate according to claim 23, wherein the lotion emulsion further comprises an additive selected from the group of preservatives, medicinal agents, humectants, fragrances, natural therapeutic oils, botanical extracts, natural or synthetic powders, and soothing agents.

30. The method of making a lotion-treated substrate according to claim 23, comprising treating the cellulosic web with lotion emulsion in an amount of from about 0.1% to about 25% by weight of the dried fiber.

31. The method of making a lotion-treated substrate according to claim 23, comprising treating the cellulosic web with lotion emulsion in an amount of from about 0.5% to about 20% by weight of the dried fiber.

32. A lotion-treated substrate suitable for tissue or towel comprising:

(a) a cellulosic web; and

(b) a lotion emulsion disposed on the web,

the lotion emulsion including a polar emollient and a non-polar emollient as well as a surfactant composition comprising a nonionic surfactant, the polar emollient, nonpolar emollient and surfactant composition being selected so as to be capable of forming a micro-emulsion in the absence of water;

(c) wherein the lotion emulsion is liquid at room temperature;

(d) the emollients and surfactant composition are selected such that the lotion emulsion is a stabilized micro-emulsion which undergoes a phase change to a semi-solid or solid upon contact with the fibers of the web and is thus immobilized on the web in a semi-solid or solid state; and

(e) wherein the lotion emulsion is capable of forming an aqueous gel upon contact with a sufficient amount of water; and

(f) wherein further the lotion emulsion is also capable of forming a micro-emulsion in the presence of water in an amount less than required for gellation.