Cleaning articles comprising a high internal phase inverse emulsion and a carrier with controlled absorbency

• US 5,908,707 A
• Filed: 12/05/1996
• Issued: 06/01/1999
• Est. Priority Date: 12/05/1996
• Status: Expired due to Term

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Cartledge, James Edwin Jr., Cabell, David William, Toussant, John William, Mackey, Larry Neil, Ampulski, Robert Stanley, Trokhan, Paul Dennis, Nissing, Nicholas James
• Primary Examiner(s): Marquis, Melvyn I.
• Application Number:
  US08/761,733
• Time in Patent Office: 908 Days
• Field of Search: 510/152, 510/153, 510/468, 428/537.5, 424/405, 424/414, 424/420
• US Class Current: 428/537.5
• CPC Class Codes: C11D 17/049 Cleaning or scouring pads; Wipes
• CPC Class Codes: Y10T 428/31993 Of paper

Abstract

Wet-like cleaning wipes and similar articles are described. These wipes comprise a carrier that provides controlled fluid absorbency and an emulsion applied to the carrier. The emulsion comprises a continuous external lipid phase and a polar (e.g., water) internal phase. The emulsion is sufficiently brittle that it ruptures when subjected to low shear pressures during use to release the dispersed polar phase. The carrier allows the released internal phase to initially reach and remain on the surface being cleaned, but then absorbs the material at the end of the wiping process.

Claims

1. An article, which comprises:

a. a carrier; and

b. an 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 melting point of about 30°

C. or higher;

(2) from about 39 to about 97% of an internal polar 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;

c. wherein the article has a rate of absorbency of distilled water of not more than about 0.35 gram per gram of carrier per second.

2. The article of claim 1 wherein the article has a rate of absorbency of distilled water of not more than about 0.25 gram per gram of carrier per second.

3. The article of claim 2 wherein the article has a rate of absorbency of distilled water of from about 0.05 to about 0.17 gram per gram of carrier per second.

4. The article of claim 1 wherein the article has an absorbent capacity of at least about 1 gram of distilled water per gram of carrier.

5. The article of claim 4 wherein the article has an absorbent capacity of at least about 5 gram of distilled water per gram of carrier.

6. The article of claim 5 wherein the article has an absorbent capacity of at least about 15 gram of distilled water per gram of carrier.

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

8. The article of claim 7 wherein the emulsion comprises from about 6 to about 15% lipid phase and from about 82 to about 91% polar phase.

9. The article of claim 1 wherein the emulsion'"'"'s internal polar phase comprises at least 60% water.

10. The article of claim 9 wherein the emulsion'"'"'s internal polar phase comprises at least 75% water.

11. 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.

12. The article of claim 11 wherein the waxy lipid material has a melting point in the range of from about 60°

to about 70°

C.

13. 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.

14. The article of claim 13 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.

15. The article of claim 1 wherein the emulsion further comprises a component selected from the group consisting of perfumes, antimicrobials, detersive surfactants, pharmaceutical actives, deodorants, opacifiers, astringents, insect repellents, bleaches, radical scavengers, chelating agents, thickeners, builders, buffers, stabilizers, bleach activators, soil suspenders, dye transfer agents, brighteners, anti dusting agents, enzymes, dispersants, dye transfer inhibitors, pigments, dyes, and mixtures thereof.

16. The article of claim 15 wherein the emulsion comprises a component selected from the group consisting of antimicrobials, detersive surfactants, bleaches, and mixtures thereof.

17. The article of claim 1 wherein the carrier comprises cellulosic fibers.

18. The article of claim 17 wherein the carrier further comprises a material selected from the group consisting of a fluid impermeable, polar-soluble film;

a sizing agent;

a hydrophobic ester or amide;

a fatty acid; and

mixtures thereof.

19. The article of claim 18 wherein the carrier comprises an amino-silicone sizing agent at a level of from about 250 to about 1000 parts per million, based on the total weight of the carrier.

20. The article of claim 1 wherein at least two different emulsions are applied to said carrier.

33. A process for making the article of claim 1, the process comprising:

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 30°

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;

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

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

34. The process of claim 33 wherein the emulsion is applied to the carrier at temperature in the range from about 60°

to about 90°

C.

35. The process of claim 34 wherein the emulsion is applied to the carrier at temperature in the range from 70°

to about 80°

C.

36. The process of claim 33 wherein the emulsion is applied to the carrier by a step selected from the group consisting of spraying, printing, coating, extruding, and combinations thereof.

37. The process of claim 36 wherein the emulsion is applied to the carrier by a step selected from the group consisting of rotogravure coating and printing.

21. An article, which comprises:

a. a carrier; and

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

(1) from about 5 to about 30% of a continuous, solidified lipid phase comprising a waxy lipid material having a melting point of from about 40°

to about 80°

C.;

(2) from about 67 to about 92% of an internal polar phase dispersed in the lipid phase, the internal polar phase comprising at least 75% water; and

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

c. wherein the article has a rate of absorbency of distilled water of from about 0.05 to about 0.25 gram per gram of carrier per second.

22. The article of claim 21 wherein the article has an absorbent capacity of at least about 5 gram of distilled water per gram of carrier.

23. An article, which comprises:

a. a carrier; and

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

wherein the article has a rate of absorbency of distilled water of not more than about 0.35 gram per gram of carrier per second, and wherein further 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 30°

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 waxy 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.

24. An article, which comprises:

a. a carrier; and

b. an 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 melting point of about 30°

C. or higher;

(2) from about 39 to about 97% of an internal polar 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;

wherein the carrier comprises a material selected from the group consisting of a fluid impermeable, polar-soluble film;

a sizing agent;

a hydrophobic ester or amide;

a fatty acid; and

mixtures thereof.

25. The article of claim 24 wherein the emulsion comprises from about 5 to about 30% lipid phase and from about 67 to about 92% polar phase.

26. The article of claim 24 wherein the emulsion'"'"'s internal polar phase comprises at least 75% water.

27. The article of claim 24 wherein the waxy lipid material has a melting point in the range of from about 40°

to about 80°

C.

28. The article of claim 24 wherein the waxy lipid material is selected from the group consisting of animal waxes, vegetable waxes, mineral waxes, synthetic waxes and mixtures thereof.

29. The article of claim 24 wherein the emulsion further comprises a component selected from the group consisting of perfumes, antimicrobials, detersive surfactants, pharmaceutical actives, deodorants, opacifiers, astringents, insect repellents, bleaches, radical scavengers, chelating agents, thickeners, builders, buffers, stabilizers, bleach activators, soil suspenders, dye transfer agents, brighteners, anti dusting agents, enzymes, dispersants, dye transfer inhibitors, pigments, dyes, and mixtures thereof.

30. The article of claim 24 wherein the carrier comprises a fluid impermeable film derived from a material selected from the group consisting of polyvinyl alcohol, polyethylene glycol, and polyvinylpyrrolidone.

31. The article of claim 24 wherein the carrier comprises a hydrophobic ester or amide.

32. The article of claim 31 wherein the carrier comprises an ester-functional ammonium compound.