Cleaning articles comprising a polarphobic region and a high internal phase inverse emulsion

• US 5,763,332 A
• Filed: 12/05/1996
• Issued: 06/09/1998
• Est. Priority Date: 04/30/1996
• Status: Expired due to Fees

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Mackey, Larry Neil, Trokhan, Paul Dennis, Gordon, Gregory Charles
• Primary Examiner(s): RAIMUND, CHRISTOPHER W
• Application Number:
  US08/759,546
• Time in Patent Office: 551 Days
• Field of Search: 442/64, 442/71, 442/79, 442/81, 442/82, 442/84, 514/938, 106/271, 106/285, 162/135, 162/136, 162/137, 252/310, 252/311
• US Class Current: 442/84
• CPC Class Codes: A61K 8/0208 Tissues; Wipes; Patches
• CPC Class Codes: A61K 8/064 Water-in-oil emulsions, e.g. Water-in-silicone emulsions
• CPC Class Codes: A61Q 19/10 Washing or bathing preparations
• CPC Class Codes: Y10T 442/2041 Two or more non-extruded coatings or impregnations
• CPC Class Codes: Y10T 442/2098 At least two coatings or impregnations of different chemical composition
• CPC Class Codes: Y10T 442/2164 Coating or impregnation specified as water repellent
• CPC Class Codes: Y10T 442/218 Organosilicon containing
• CPC Class Codes: Y10T 442/2189 Fluorocarbon containing
• CPC Class Codes: Y10T 442/2205 Natural oil or wax containing

Abstract

Wet-like cleaning wipes and similar articles that are particularly useful in removing perianal soils. These wipes comprise a carrier comprising at least one polarphobic region, an optional, preferred substrate such as tissue paper web, and an emulsion applied to the carrier. The emulsion comprises a continuous external lipid phase and a dispersed internal polar phase. The continuous lipid phase of the emulsion is sufficiently brittle that it ruptures when subjected to low shear pressures during use to release the dispersed internal phase. Inclusion of the polarphobic region allows the ability to control flow of the internal water phase components following rupture of the emulsion.

Claims

1. An article, which comprises:

a. a carrier comprising at least one polarphobic region; and

b. an emulsion applied to the carrier, the emulsion comprising;

(1) from about 2 to about 60% of a continuous solidified external lipid phase comprising a waxy lipid material having a melting point of about 40°

C. or higher,

(2) from about 39 to about 97% of an internal polar phase dispersed in the external lipid phase; and

(3) an effective amount of an emulsifier capable of forming the emulsion when the external lipid phase is in a fluid state.

2. The article of claim 1 wherein the carrier further comprises at least one polarphilic substrate layer.

3. The article of claim 2 wherein the polarphilic substrate layer is a material selected from the group consisting of woven materials, nonwoven materials, foams, sponges, battings, balls, puffs, and films.

4. The article of claim 3 wherein the polarphilic substrate layer is a paper web.

5. The article of claim 4 wherein the at least one polarphobic region of the carrier comprises a material selected from the group consisting of a silicone crosslinking compound;

a fluorochemical cross-linking compound;

a commercial water repellent listed in McCutcheon'"'"'s Volume 2;

Functional Materials 1995;

a hydrophobic polymeric film;

a layer of hydrophobic fibers; and

mixtures thereof.

6. The article of claim 1 wherein the carrier is a polarphobic, polymeric film or a sheet of polarphobic fibers.

7. The article of claim 1 wherein the carrier comprises a nonwoven substrate treated with a polarphobic material selected from the group consisting of silicone crosslinking compound;

a fluorochemical cross-linking compound;

a commercial water repellent listed in McCutcheon'"'"'s Volume 2;

Functional Materials 1995, and mixtures thereof.

8. The article of claim 7 wherein the polarphilic substrate is surface treated with the polarphobic material so that at least one surface of the substrate comprises numerous, discrete polarphobic regions dispersed in a continuous polarphilic region.

9. The article of claim 7 wherein the polarphilic substrate is surface treated with the polarphobic material so that at least one surface of the polarphilic substrate is rendered completely polarphobic.

10. The article of claim 5 wherein the carrier comprises a polarphobic, polymeric film.

11. The article of claim 10 wherein the carrier further comprises a distinct polarphilic substrate.

12. The article of claim 10 wherein the carrier comprises a polarphobic, polymeric film positioned between a first and a second polarphilic substrate layer.

13. The article of claim 12 wherein the first and second polarphilic substrate layers are both paper webs.

14. The article of claim 13 wherein the emulsion is applied between the polarphobic film and the first paper web.

15. The article of claim 14 wherein the second paper web is treated with an polar solution containing a detersive surfactant.

16. The article of claim 12 wherein the first polarphilic substrate layer is a paper web and the second polarphilic substrate layer is a nonwoven material.

17. The article of claim 16 wherein the emulsion is applied only between the polarphobic film and the nonwoven material.

18. The article of claim 1 wherein the emulsion comprises from about 5 to about 30% external lipid phase and from about 67 to about 92% internal polar phase.

19. The article of claim 18 wherein the emulsion comprises from about 6 to about 15% external lipid phase and from about 82 to about 91% internal polar phase.

20. The article of claim 1 wherein the waxy lipid material has a melting point in the range of from about 40°

to about 80°

C.

21. The article of claim 20 wherein the waxy lipid material has a melting point in the range of from about 60°

to about 70°

C.

22. The article of claim 1 wherein the waxy lipid material is selected from the group consisting of animal waxes, vegetable waxes, mineral waxes, synthetic waxes and mixtures thereof.

23. The article of claim 22 wherein the waxy lipid material is selected from the group consisting of beeswax, lanolin, candelilla, petrolatum, microcrystalline wax, yellow ceresine wax, white ozokerite, polyethylene waxes, and mixtures thereof.

24. The article of claim 1 wherein the emulsifier comprises from about 1 to about 10% of the emulsion, the emulsifier having an HLB value in the range of from about 2 to about 5 and being selected from group consisting of alkyl modified dimethicone copolyols, sorbitan esters of C₁₆ -C₂₂ saturated, unsaturated and branched chain fatty acids, glyceryl monoesters of C₁₆ -C₂₂ saturated, unsaturated and branched chain fatty acids, sucrose esters of C₁₂ -C₃₂ saturated, unsaturated and branched chain fatty acids, polyglycerol esters of C₁₆ -C₂₂ saturated, unsaturated and branched chain fatty acids, and mixtures thereof.

25. The article of claim 24 wherein the emulsion further comprises a component selected from the group consisting of perfumes, antimicrobial actives, pharmaceutical actives, deodorants, opacifiers, astringents, skin moisturizers, and mixtures thereof.

26. An article, which comprises:

a. a carrier comprising at least one polarphobic region; and

b. an emulsion having a continuous external lipid phase and a dispersed polar internal phase applied to the carrier;

wherein the emulsion is prepared by combining at least the following materials;

(1) from about 2 to about 60% of a a waxy lipid material having a melting point of about 40°

C. or higher;

(2) from about 39 to about 97% of a polar material; and

(3) an effective amount of an emulsifier capable of forming the emulsion when the external lipid is in a fluid state;

where the weight percent for each of components (1), (2) and (3) is determined from the amount combined relative to the total weight of the emulsion.

27. A process for applying an emulsion to a carrier comprising at least one polarphobic region, the process comprising the steps of:

A. forming an emulsion comprising.

(1) from about 2 to about 60% of a continuous external lipid phase comprising a waxy lipid material having a melting point of about 40°

C. or higher,

(2) from about 39 to about 97% of an internal polar phase dispersed in the external lipid phase; and

(3) an effective amount of an emulsifier capable of forming the emulsion when the al lipid phase is in a fluid state;

B. applying the emulsion to the carrier at a temperature sufficiently high such that the external lipid phase has a fluid or plastic consistency;

C. cooling the applied emulsion to a temperature sufficiently low such that the external lipid phase solidifies.

28. The process of claim 27 wherein the emulsion is applied to the carrier at a temperature in the range of from about 50°

to about 90°

C.

29. The process of claim 27 wherein the emulsion is applied to the carrier by a step selected from the group consisting of spraying, printing, coating, extruding, and combinations thereof.

30. The process of claim 29 wherein the emulsion is applied to the carrier by flexible rotogravure coating.

31. The process of claim 27 wherein the emulsion is applied to the carrier at a constant volumetric flow rate.

32. The process of claim 27 wherein the carrier is a polarphobic, polymeric film positioned between a first and a second paper web, where the polarphobic film is adjacent the inner surface of each of the paper webs.

33. The process of claim 32 wherein the emulsion is applied i) to one surface of the polarphobic film, ii) to the inner surface of the first paper web, or iii) to the surface of the polarphobic film adjacent the first paper web and to the inner surface of the first paper web.

34. The process of claim 33 wherein a polar solution containing a detersive surfactant is applied the carrier.

35. An article, which comprises:

a. carrier comprising at least one hydrophobic region; and

b. a water-in-lipid emulsion applied to the carrier, the emulsion comprising;

(1) from about 2 to about 60% of a continuous solidified lipid phase comprising a waxy lipid material having a molting point of about 40°

C. or higher;

(2) from about 39 to about 97% of an internal water phase dispersed in the lipid phase; and

(3) an effective amount of an emulsifier capable of forming the emulsion when the lipid phase is in a fluid state.

36. The article of claim 35 wherein the carrier further comprises at least one hydrophilic substrate layer.

37. The article of claim 36 wherein the hydrophilic substrate layer is a material selected from the group consisting of woven materials, nonwoven materials, foams, sponges, battings, balls, puffs, and films.

38. The article of claim 37 wherein the hydrophilic substrate layer is a paper web.

39. The article of claim 38 wherein the at least one hydrophobic region of the carrier comprises a material selected from the group consisting of a silicone crosslinking compound;

a fluorochemical cross-linking compound;

a commercial water repellent listed in McCutcheon'"'"'s Volume 2;

Functional Materials 1995;

a hydrophobic polymeric film;

a layer of hydrophobic fibers; and

mixtures thereof.

40. The article of claim 35 wherein the carrier is a hydrophobic, polymeric film or a sheet of hydrophobic fibers.

41. The article of claim 35 wherein the carrier comprises a nonwoven substrate treated with a hydrophobic material selected from the group consisting of silicone crosslinking compound;

a fluorochemical cross-linking compound;

a commercial water repellent listed in McCutcheon'"'"'s Volume 2;

Functional Materials 1995; and

mixtures thereof.

42. The article of claim 41 wherein the hydrophilic substrate is surface treated with the hydrophobic material so that at least one surface of the substrate comprises numerous, discrete hydrophobic regions dispersed in a continuous hydrophilic region.

43. The article of claim 42 wherein the hydrophilic substrate is surface treated with the hydrophobic material so that at least one surface of the hydrophilic substrate is rendered completely hydrophobic.

44. The article of claim 35 wherein the carrier comprises a hydrophobic, polymeric film positioned between a first and a second hydrophilic substrate layer.

45. The article of claim 44 wherein the first and second hydrophilic substrate layers are both paper webs.

46. The article of claim 45 wherein the emulsion is applied between the hydrophobic film and the first paper web.

47. The article of claim 44 wherein the first hydrophilic substrate layer is a paper web and the second hydrophilic substrate layer is a nonwoven material.

48. The article of claim 47 wherein the emulsion is applied only between the hydrophobic film and the nonwoven material.

49. The article of claim 35 wherein the emulsion comprises from about 5 to about 30% lipid phase and from about 67 to about 92% water phase.

50. The article of claim 35 wherein the waxy lipid material has a melting point in the range of from about 40°

to about 80°

C.

51. The article of claim 35 wherein the waxy lipid material is selected from the group consisting of animal waxes, vegetable waxes, mineral waxes, synthetic waxes and mixtures thereof.

52. The article of claim 35 wherein the emulsifier comprises from about 1 to about 10% of the emulsion, the emulsifier having an HLB value in the range of from about 2 to about 5 and being selected from group consisting of alkyl modified dimethicone copolyols, sorbitan esters of C₁₆ -C₂₂ saturated, unsaturated and branched chain fatty acids, glyceryl monoesters of C₁₆ -C₂₂ saturated, unsaturated and branched chain fatty acids, sucrose esters of C₁₂ -C₂₂ saturated, unsaturated, and branched chain fatty acids, polyglycerol esters of C₁₆ -C₂₂ saturated, unsaturated and branched chain fatty acids, and mixtures thereof.

53. An article, which comprises:

a. a carrier comprising at least one hydrophobic region; and

b. a water-in-lipid emulsion applied to the carrier;

wherein the emulsion is prepared by combining at least the following materials;

(1) from about 2 to about 60% of a waxy lipid material having a melting point of about 40°

C. or higher;

(2) from about 39 to about 97% of water; and

(3) an effective amount of an emulsifier capable of forming the emulsion when the lipid is in a fluid state;

where the weight percent for each of components (1), (2) and (3) is determined from the amount combined relative to the total weight of the emulsion.