ANTI-MICROBIAL HAND TOWEL WITH TIME-DELAY CHROMATIC TRANSFER INDICATOR AND ABSORBENCY RATE DELAY

• US 20150056148A1
• Filed: 10/24/2014
• Published: 02/26/2015
• Est. Priority Date: 03/28/2006
• Status: Active Grant

• Current Assignee: GPCP IP Holdings LLC
• Original Assignee: Georgia-Pacific Consumer Products LP (KOCH Industries Incorporated)
• Inventors: Luu, Phuong Van, Awofeso, Anthony O., Yardley, Craig D., Yeh, Kang Chang, Janda, Bruce W.
• Granted Patent: US 9,603,360 B2
• Time in Patent Office: Days
• US Class Current: 424/10.3
• CPC Class Codes: A01N 25/00 Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application , e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
• CPC Class Codes: A01N 25/34 Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group
• CPC Class Codes: A61K 2800/45 Colour indicators, e.g. pH- or Redox indicators
• CPC Class Codes: A61K 31/075 Ethers or acetals
• CPC Class Codes: A61K 31/14 Quaternary ammonium compounds, e.g. edrophonium, choline betaines A61K31/205
• CPC Class Codes: A61K 33/32 Manganese; Compounds thereof
• CPC Class Codes: A61K 8/0208 Tissues; Wipes; Patches
• CPC Class Codes: A61K 8/068 Microemulsions
• CPC Class Codes: A61Q 17/005 Antimicrobial preparations
• CPC Class Codes: D21H 21/28 Colorants ; Pigments or opacifying agents
• CPC Class Codes: D21H 21/36 Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents

Abstract

A disposable paper towel with an anti-microbial lotion and is provided with a chromatic transfer indicator which undergoes a delayed, visually perceptible color change at a predetermined time after the towel is wetted. An anti-microbial lotion on the towel increases water absorbency times (WAR) to further promote lotion transfer to the skin and increase lotion transfer effectiveness.

Claims

1. An anti-microbial paper towel with a chromatic transfer indicator comprising:

a) a cellulosic web;

b) a transferable lotion composition comprising an emollient and an anti-microbial agent, the lotion composition being immobilized on the cellulosic web in a semi-solid or solid form,

wherein the transferable lotion composition is selected from lotion compositions which are transferable upon contact with water or lotion compositions which are transferable upon application of heat;

c) a pH-sensitive transfer indicator; and

d) a water soluble indicator triggering agent disposed on the web;

wherein the pH-sensitive transfer indicator and indicator triggering agent are selected and applied to the web such that the pH-sensitive transfer indicator undergoes a visually perceivable color change upon contact of the towel with water after a characteristic time delay of at least about 5 seconds.

2. The anti-microbial paper towel according to claim 1, wherein the pH-sensitive transfer indicator and the indicator triggering agent are selected such that the pH-sensitive transfer indicator undergoes a visually perceivable color change upon contact with water after a characteristic time delay of at least about 10 seconds.

3. The anti-microbial paper towel according to claim 1, wherein the pH-sensitive transfer indicator and the indicator triggering agent are selected such that the pH-sensitive transfer indicator undergoes a visually perceivable color change upon contact with water after a characteristic time delay of at least about 15 seconds.

4. The anti-microbial paper towel according to claim 1, wherein the pH-sensitive transfer indicator and the indicator triggering agent are selected such that the pH-sensitive transfer indicator undergoes a visually perceivable color change upon contact with water after a characteristic time delay of at least about 20 seconds.

5. An anti-microbial paper towel comprising:

a) a cellulosic towel web;

b) a lotion emulsion including an anti-microbial agent 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, wherein the lotion emulsion is substantially liquid at room temperature, the emollients and surfactant composition are selected such that the lotion emulsion is immobilized on the web in a semi-solid or solid state and wherein further the lotion emulsion is capable of forming an aqueous gel upon contact with water;

c) a pH-sensitive transfer indicator disposed on the web; and

d) a water soluble indicator triggering agent disposed on the web.

6. The anti-microbial paper towel according to claim 5, wherein the lotion emulsion comprises polar emollient in an amount of from about 2% to about 40% by weight of the lotion emulsion.

7. The anti-microbial paper towel according to claim 5, wherein the lotion emulsion comprises a polar polyhydroxy emollient selected from propylene glycol, glycol, glycerol, diethylene glycol, methylene glycol, polypropylene glycol, polyethylene glycol and sorbitol.

8. The anti-microbial paper towel according to claim 7, wherein the polar emollient is propylene glycol.

9. The anti-microbial paper towel according to claim 5, wherein the lotion emulsion comprises non-polar emollient in the amount of from about 10% to about 40% by weight of the lotion emulsion.

10. The anti-microbial paper towel according to claim 5, wherein the lotion emulsion comprises a non-polar emollient selected from aromatic or linear esters, Guerbet ester, mineral oil, squalane, liquid paraffin, and mixtures thereof.

11. The anti-microbial paper towel according to claim 10, wherein the non-polar emollient is isopropyl myristate.

12. The anti-microbial paper towel according to claim 10, wherein the non-polar emollient is C₁₂-C₁₅ alkyl benzoate ester.

13. The anti-microbial paper towel according to claim 10, wherein the non-polar emollient is tri-octyldodecyl-citrate.

14. The anti-microbial paper towel according to claim 10, wherein the non-polar emollient is a mixture of C₁₂-C₁₅ alkyl benzoate ester and carnation oil.

15. The anti-microbial paper towel according to claim 5, wherein the surfactant composition comprises non-ionic surfactant including a fatty alcohol in the amount of from about 40% to about 70% by weight of the lotion emulsion.

16. The anti-microbial paper towel according to claim 5, 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, ethoxylated methyl glucose having from about 10 to about 20 repeating ethoxy units, a mixture thereof and the like.

17. The anti-microbial paper towel according to claim 16, wherein the non-ionic surfactant comprises PEG-20 methyl glucose sesquistearate.

18. The anti-microbial paper towel according to claim 17, wherein the non-ionic surfactant comprises PEG-20 methyl glucose distearate.

19. The anti-microbial paper towel according to claim 5, wherein the surfactant composition comprises a co-surfactant in the amount of from about 0.1% to about 20% by weight of the lotion emulsion.

20. The anti-microbial paper towel according to claim 19, wherein the surfactant composition comprises a co-surfactant selected from C₁₂-C₁₈ fatty alcohols, behenyl alcohol, cetyl alcohol, stearyl alcohol, iso-cetyl alcohol, and iso-stearyl alcohol.

21. The anti-microbial paper towel according to claim 19, wherein the co-surfactant is myristyl alcohol.

22. The anti-microbial paper towel according to claim 19, wherein the co-surfactant is a mixture of cetyl alcohol (C₁₆) and stearyl alcohol (C₁₈).

23. The anti-microbial paper towel according to claim 5, wherein the micro-emulsion is substantially waterless.

24. An anti-microbial paper towel comprising:

a) a cellulosic towel web;

b) a transferable lotion composition disposed on the web comprising an emollient, an anti-microbial agent, and a retention/release agent such that the lotion has a AH above about 37°

C. of more than about 10 calories/gram, a total heat of melting of above about 25 calories/gram, and an onset of melting temperature of at least about 30°

C.;

c) a pH-sensitive transfer indicator disposed on the web; and

d) a water soluble indicator triggering agent disposed on the web.

25. The anti-microbial paper towel according to claim 24, wherein the lotion composition further comprises a surfactant composition in the amount of from about 10% to about 15% by weight of the lotion composition.

26. The anti-microbial paper towel according to claim 24, wherein the lotion composition further comprises a surfactant selected from methyl glucoside sesquistearate, ethoxylated methyl glucoside sesquistearate containing 20 moles of oxyethylene units, or combinations thereof.

27. The anti-microbial paper towel according to claim 25, wherein the surfactant comprises a mixture of PEG-20 methyl glucose sesquistearate and methyl glucose sesquistearate.

28. The anti-microbial paper towel according to claim 24, wherein the lotion composition comprises an emollient in the amount of from about 5% to about 75% by weight of the lotion composition.

29. The anti-microbial paper towel according to claim 28, wherein the emollient comprises an aromatic ester emollient, a fatty alcohol ester of a non-fatty organic acid emollient, or mixtures thereof.

30. The anti-microbial paper towel according to claim 29, wherein the aromatic ester emollient is a benzoate ester emollient selected from C₁₂-C₁₅ alkyl benzoate, stearyl benzoate, octyl dodecyl benzoate, isostearyl benzoate, methyl gluceth-20 benzoate, stearyl ether benzoate, poloxamer 182 dibenzoate, poloxamer 105 benzoate, or mixtures thereof.

31. The anti-microbial paper towel according to claim 29, wherein the fatty alcohol ester of a non-fatty organic acid emollient comprises C₁₂-C₁₅ octanoate.

32. The anti-microbial paper towel according to claim 29, wherein the emollient is a mixture of C₁₂-C₁₅ alkyl benzoate.

33. The anti-microbial paper towel according to claim 24, wherein the lotion composition comprises a retention/release agent in the amount of from about 25% to about 95% by weight of the lotion composition.

34. The anti-microbial paper towel according to claim 24, wherein the retention/release agent comprises a C₁₂-C₁₈ fatty alcohol.

35. The anti-microbial paper towel according to claim 34, wherein the fatty alcohol is selected from dodecanol, tridecanol, tetradecanol, pentadecanol, hexadecanol, heptadecanol, octadecanol, or mixtures thereof.

36. The anti-microbial paper towel according to claim 34, wherein the fatty alcohol is a mixture of cetyl alcohol and stearyl alcohol.

37. The anti-microbial paper towel according to claim 24, wherein the lotion composition is substantially waterless.