Antimicrobial hand towel for touchless automatic dispensers

• US 20080008865A1
• Filed: 06/18/2007
• Published: 01/10/2008
• Est. Priority Date: 06/23/2006
• Status: Abandoned Application

• Current Assignee: Georgia-Pacific Consumer Products LP (KOCH Industries Incorporated)
• Original Assignee: Georgia-Pacific Consumer Products LP (KOCH Industries Incorporated)
• Inventors: Chou, Hung, Yardley, Craig, Yeh, Kang, Janda, Bruce, Luu, Phuong, Awofeso, Anthony, McCullough, Stephen
• Application Number:
  US11/820,067
• Publication Number:
  US 20080008865A1
• Time in Patent Office: Days
• US Class Current: 428/219
• CPC Class Codes: B32B 2307/7145 Rot proof, resistant to bacteria, mildew, mould, fungi
• CPC Class Codes: B32B 2317/12 Paper, e.g. cardboard
• CPC Class Codes: B32B 33/00 Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
• CPC Class Codes: D21F 11/006 Making patterned paper
• CPC Class Codes: D21F 11/14 Making cellulose wadding, filter or blotting paper
• CPC Class Codes: D21H 21/36 Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents
• CPC Class Codes: D21H 27/005 relating to physical or mechanical properties, e.g. tensile strength, stretch, softness

Abstract

A disposable anti-microbial paper towel and dispensing method includes disposing paper towel in an automatic touchless dispenser which is adapted to generate a touchless proximity signal upon nearness of a consumer, and dispensing the paper towel in response to the proximity signal. A typical invention towel has: (i) a cellulosic web characterized in that the web is substantially without crepe bars and has an unlotioned MD bending length of at least 3.5 cm; and (ii) a transferable lotion composition comprising an emollient and anti-microbial agent, the lotion composition being immobilized on the cellulosic web in a semi-solid or solid form. 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 body heat.

Claims

1. An anti-microbial paper towel for use with touchless automatic dispensers comprising:

a) a cellulosic web characterized in that the web is substantially without crepe bars and has an unlotioned MD bending length of at least 3 cm; and

b) a transferable lotion composition comprising an emollient and 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 body heat.

2. The anti-microbial paper towel according to claim 1, wherein the lotion composition comprises from about 0.01% to about 10% by weight anti-microbial agent.

3. The anti-microbial paper towel according to claim 1, wherein the lotion composition comprises from about 0.05% to about 5% by weight anti-microbial agent.

4. The anti-microbial paper towel according to claim 1, 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;

diazolidinyl urea;

butoconazole;

nystatin;

terconazole;

nitrofurantoin;

phenazopyridine;

acyclovir;

clortrimazole;

chloroxylenol;

chlorhexidine;

chlorhexidine gluconate;

miconazole;

terconazole;

butylparaben;

ethylparaben;

methylparaben;

methylchloroisothiazoline;

methylisothiazoline;

a mixture of 1,3-bis(hydroxymethyl)-5,5-dimethylhydantoin and 3-iodo-2-propynyl butyl carbamate;

oxyquinoline;

EDTA;

tetrasodium EDTA;

p-hydroxyl benzoic acid ester;

alkyl pyridinum compounds;

coco phosphatidyl PG-dimonium chloride;

chlorhexidene digluconate;

chlorhexidene acetate;

chlorhexidene isethionate;

chlorhexidene hydrochloride;

benzalkonium chloride;

benzethonium chloride;

polyhexamethylene biguanide, and mixtures thereof.

5. The anti-microbial paper towel according to claim 1, wherein the anti-microbial agent comprises a zinc salt.

6. The anti-microbial paper towel according to claim 1, wherein the cellulosic web is predominantly softwood fiber.

7. The anti-microbial paper towel according to claim 1, wherein the cellulosic web comprises at least about 25% by weight of recycle fiber.

8. The anti-microbial paper towel according to claim 1, wherein the cellulosic web comprises at least about 50% by weight of recycle fiber.

9. The anti-microbial paper towel according to claim 1, wherein the cellulosic web comprises at least about 75% or more by weight of recycle fiber.

10. The anti-microbial paper towel according to claim 1, wherein the cellulosic web comprises 100% by weight of recycle fiber.

11. The anti-microbial paper towel according to claim 1, wherein the web comprises a wet strength agent.

12. The anti-microbial paper towel according to claim 11, wherein the wet strength agent is selected from aldehyde-containing polyols, aldehyde-containing cationic starch, glyoxal, glutaraldehyde, dialdehydes, boric acid carbonate, zirconium ammonium carbonate, glyoxalated polyacrylamide, polyamide-epichlorohydrin, polyamine-epichlorohydrin, urea-formaldehyde, melamine-formaldehyde, polyethyleneimine, and latex emulsions.

13. The anti-microbial paper towel according to claim 1, wherein the transferable lotion composition disposed on the web is selected and applied in amounts such that it imparts a water absorption rate delay of at least about 25% to the cellulosic web.

14. The anti-microbial paper towel according to claim 1, wherein the transferable lotion composition disposed on the web is selected and applied in amounts such that it imparts a water absorption rate delay to the cellulosic web of at least about 50%.

15. The anti-microbial paper towel according to claim 1, wherein the transferable lotion composition disposed on the web is selected and applied in amounts such that it imparts a water absorption delay to the cellulosic web of at least about 75%.

16. The anti-microbial paper towel according to claim 1, wherein the transferable lotion composition disposed on the web is selected and applied in amounts such that it imparts a water absorption delay to the cellulosic web of at least about 100%.

17. The anti-microbial paper towel according to claim 1, wherein the unlotioned cellulosic web has substantially the same SAT value as the lotioned paper towel.

18. The anti-microbial paper towel according to claim 1, wherein the paper towel has a SAT value of at least about 2.5 g/g.

19. The anti-microbial paper towel according to claim 1, wherein the paper towel has a SAT value of at least about 3 g/g.

20. The anti-microbial paper towel according to claim 1, wherein the paper towel has a SAT value of at least about 4 g/g.

21. The anti-microbial paper towel according to claim 1, wherein the paper towel has a SAT value of at least about 4.5 g/g.

22. The anti-microbial paper towel according to claim 1, wherein the paper towel has a SAT value of from about 2.5 g/g to about 5 g/g.

23. The anti-microbial paper towel according to claim 1, wherein the transferable lotion is applied to the cellulosic web in an amount of from about 2 weight percent to about 20 weight percent, based on the weight of fiber in the web.

24. The anti-microbial paper towel according to claim 1, wherein the transferable lotion is applied to the cellulosic web in an amount of from about 3 percent by weight to about 15 percent by weight, based on the weight of fiber in the web.

25. The anti-microbial paper towel according to claim 1, wherein the transferable lotion is applied to the cellulosic web in an amount of from about 4 percent by weight to about 12 percent by weight, based on the weight of fiber in the web.

26. The anti-microbial paper towel according to claim 1, wherein the unlotioned cellulosic web has a basis weight of from about 15 g/m² to about 65 g/m².

27. The anti-microbial paper towel according to claim 1, wherein the unlotioned cellulosic web has a basis weight of from about 25 g/m² to about 50 g/m².

28. The anti-microbial paper towel according to claim 1, wherein the unlotioned cellulosic web has a basis weight of from about 30 g/m² to about 40 g/m².

29. The anti-microbial paper towel according to claim 1, wherein the web has an unlotioned MD bending length of from about 3.5 cm to about 5 cm.

30. The anti-microbial paper towel according to claim 1, wherein the web has an unlotioned MD bending length of from about 3.75 cm to about 4.5 cm.

31. The anti-microbial paper towel according to claim 1, wherein the web has an unlotioned MD bending length of at least about 3.5 cm.

32. The anti-microbial paper towel according to claim 1, wherein the web has an unlotioned MD stretch of at least about 5%.

33. The anti-microbial paper towel according to claim 1, having an unlotioned MD stretch of at least about 6%.

34. The anti-microbial paper towel according to claim 1, having an unlotioned MD stretch of at least about 7%.

35. The anti-microbial paper towel according to claim 1, having an unlotioned MD stretch of at least about 7.5%.

36. The anti-microbial paper towel according to claim 1, having an unlotioned MD stretch of at least about 8%.

37. The anti-microbial paper towel according to claim 1, having an unlotioned MD stretch of at least about 9%.

38. The anti-microbial paper towel according to claim 1, provided with identifying indicia indicating its anti-microbial lotion features.

39. An anti-microbial paper towel for use with touchless automatic dispensers comprising:

a) a cellulosic web characterized in that the web is substantially without crepe bars; and

b) a transferable lotion composition comprising an emollient and 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 body heat; and

wherein the lotioned towel has an MD bending length of at least 3 cm.

40. The anti-microbial paper towel according to claim 39, wherein the lotioned towel has an MD bending length of from about 3 cm to about 5 cm.

41. The anti-microbial paper towel according to claim 39, wherein the lotioned towel has an MD bending length of from about 3.25 cm to about 5 cm.

42. The anti-microbial paper towel according to claim 39, wherein the lotioned towel has an MD bending length of at least about 3.25 cm.

43. The anti-microbial paper towel according to claim 39, wherein the lotioned towel has a CD wet/dry tensile ratio of at least about 25%.

44. The anti-microbial paper towel according to claim 39, wherein the lotioned towel has a CD wet/dry tensile ratio of at least about 28%.

45. The anti-microbial paper towel according to claim 39, wherein the lotioned towel has a CD wet/dry tensile ratio of at least about 32%.

46. The anti-microbial paper towel according to claim 39, wherein the lotioned towel has a CD wet/dry tensile ratio of from 25% to 40%.

47. The anti-microbial paper towel according to claim 39, wherein the lotioned towel has a wet/dry CD ratio in % of at least 5 points higher than a like unlotioned towel.

48. The anti-microbial paper towel according to claim 39, wherein the lotioned towel has a wet/dry CD ratio in % of at least 7 points higher than a like unlotioned towel.

49. The anti-microbial paper towel according to claim 39, wherein the lotioned towel has a GM break modulus at least 15% lower than a like unlotioned towel.

50. The anti-microbial paper towel according to claim 39, wherein the lotioned towel has a GM break modulus at least 20% lower than a like unlotioned towel.

51. The anti-microbial paper towel according to claim 39, wherein the lotioned towel has a GM break modulus at least 25% lower than a like unlotioned towel.

52. The anti-microbial paper towel according to claim 39, wherein the lotioned towel has a dry MD tensile strength at least 10% lower than a like unlotioned towel.

53. The anti-microbial paper towel according to claim 39, wherein the lotioned towel has a dry MD tensile strength at least 15% lower than a like unlotioned towel.

54. The anti-microbial paper towel according to claim 39, wherein the lotioned towel has a dry MD tensile strength at least 20% lower than a like unlotioned towel.

55. An anti-microbial paper towel comprising:

a) a cellulosic towel web characterized in that the web is substantially without crepe bars and has an unlotioned MD bending length of at least 3.5 cm; and

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.

56. The anti-microbial paper towel according to claim 55, wherein the lotion emulsion comprises polar emollient in an amount of from about 2% to about 40% by weight of the lotion emulsion.

57. The anti-microbial paper towel according to claim 55, 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.

58. The anti-microbial paper towel according to claim 55, wherein the lotion emulsion comprises non-polar emollient in the amount of from about 10% to about 40% by weight of the lotion emulsion.

59. An anti-microbial paper towel comprising:

a) a cellulosic towel web characterized in that the web is substantially without crepe bars and has an unlotioned MD bending length of at least 3.5 cm; and

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 Δ

H 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.

60. The anti-microbial paper towel according to claim 59, 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.

61. The anti-microbial paper towel according to claim 60, 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.

62. A method of dispensing a disposable anti-microbial paper towel comprising:

a) disposing paper towel in an automatic touchless dispenser which is adapted to generate a touchless proximity signal upon nearness of a consumer, the towel including;

(i) a cellulosic web characterized in that the web is substantially without crepe bars and has an unlotioned MD bending length of at least 3.5 cm; and

(ii) a transferable lotion composition comprising an emollient and 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 body heat; and

b) dispensing the paper towel in response to the proximity signal.

63. A method of making a fabric-creped absorbent anti-microbial paper towel with improved dispensing characteristics comprising:

a) compactively dewatering a papermaking furnish to form a nascent web;

b) applying the dewatered web to a translating transfer surface moving at a first speed;

c) fabric-creping the web from the transfer surface at a consistency of from about 30 to about 60 percent utilizing a patterned creping fabric, the creping step occurring under pressure in a fabric creping nip defined between the transfer surface and the creping fabric wherein the fabric is traveling at a second speed slower than the speed of said transfer surface, the fabric pattern, nip parameters, velocity delta and web consistency being selected such that the web is creped from the transfer surface and transferred to the creping fabric;

d) adhering the web to a drying cylinder with a resinous adhesive coating composition;

e) drying the web on the drying cylinder; and

f) peeling the web from the drying cylinder;

wherein the furnish, creping fabric and creping adhesive are selected and the velocity delta, nip parameters and web consistency, caliper and basis weight are controlled such that the MD bending length of the dried web is at least about 3.5 cm, and

g) applying a transferable lotion composition to the web, the lotioned composition comprising an emollient and 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 body heat.

64. The anti-microbial paper towel produced according to claim 63, wherein the anti-microbial agent is selected from:

2,4,4′

-trichloro-2′

-hydroxydiphenyl ether;

3,4,4′

-trichlorocarbanilide;

3,4,4′

-trifluoromethyl-4,4′

-dichlorocarbanilide;

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;

diazolidinyl urea;

butoconazole;

nystatin;

terconazole;

nitrofurantoin;

phenazopyridine;

acyclovir;

clortrimazole;

chloroxylenol;

chlorhexidine;

chlorhexidine gluconate;

miconazole;

terconazole;

butylparaben;

ethylparaben;

methylparaben;

methylchloroisothiazoline;

methylisothiazoline;

a mixture of 1,3-bis(hydroxymethyl)-5,5-dimethylhydantoin and 3-iodo-2-propynyl butyl carbamate;

oxyquinoline;

EDTA;

tetrasodium EDTA;

p-hydroxyl benzoic acid ester;

alkyl pyridinum compounds;

coco phosphatidyl PG-dimonium chloride;

chlorhexidene digluconate;

chlorhexidene acetate;

chlorhexidene isethionate;

chlorhexidene hydrochloride;

benzalkonium chloride;

benzethonium chloride;

polyhexamethylene biguanide, and mixtures thereof.