Cleansing articles for skin or hair

• US 6,280,757 B1
• Filed: 05/25/1999
• Issued: 08/28/2001
• Est. Priority Date: 05/22/1997
• Status: Expired due to Term

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: McAtee, David M., Hasenoehrl, Erik J.
• Primary Examiner(s): Page, Thurman K.
• Assistant Examiner(s): MCQUEENEY, PATRICIA E
• Application Number:
  US09/318,676
• Time in Patent Office: 826 Days
• Field of Search: 424/400, 424/401, 424/443, 428/311.11
• US Class Current: 424/402
• CPC Class Codes: A61K 8/0208 Tissues; Wipes; Patches
• CPC Class Codes: A61K 8/44 Aminocarboxylic acids or derivatives thereof, e.g. aminocarboxylic acids containing sulfur; Salts; Esters or N-acylated derivatives thereof
• CPC Class Codes: A61K 8/463 containing sulfuric acid derivatives, e.g. sodium lauryl sulfate
• CPC Class Codes: A61K 8/4946 Imidazoles or their condensed derivatives, e.g. benzimidazoles
• CPC Class Codes: A61K 8/73 Polysaccharides
• CPC Class Codes: A61Q 19/10 Washing or bathing preparations
• CPC Class Codes: A61Q 5/02 Preparations for cleaning the hair
• CPC Class Codes: Y10T 428/249962 Void-containing component has a continuous matrix of fibers only [e.g., porous paper, etc.]
• CPC Class Codes: Y10T 442/20 Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
• CPC Class Codes: Y10T 442/2525 Coating or impregnation functions biologically [e.g., insect repellent, antiseptic, insecticide, bactericide, etc.]

Abstract

The present invention relates to disposable, personal cleansing articles useful for cleansing the skin or hair. These articles are used by the consumer by wetting the dry article with water and then rubbing the article against the skin or hair. The article comprises a water insoluble substrate having a cleansing surface that contains apertures of a certain size and frequency, and a lathering surfactant releasably associated with the substrate. Preferably, the articles of the present invention further comprise a conditioning component.

Claims

1. A disposable, single use personal cleansing article especially useful for cleansing skin or hair, which article comprises:

(A) a water-insoluble, substrate having at least one cleansing surface; and

(B) from about 0.5% to about 250% by weight of said substrate of a lathering surfactant releasably associated with said substrate;

wherein the cleansing surface of said substrate contains a plurality of apertures which range in average size from about 0.5 to 5 mm in diameter and which are located within said cleansing surface of said substrate at a frequency of from about 0.5 to about 12 per linear centimeter; and

wherein the substrate is a nonwoven substrate comprised of fibers.

2. An article according to claim 1 wherein said lathering surfactant comprises from about 0.5% to about 12.5% by weight of said water insoluble substrate and wherein said substrate has a cleansing surface area of from about 65 to 775 cm².

3. An article according to claim 2 wherein said lathering surfactant is selected from the group consisting of anionic lathering surfactants, nonionic lathering surfactants, amphoteric lathering surfactants, and mixtures thereof.

4. An article according to claim 3 wherein the average size of said apertures ranges from about 1 mm to about 4 mm and the frequency of the apertures in the substrate ranges from about 1 to 6 per linear centimeter.

5. An article according to claim 2 further comprising a conditioning component added onto or impregnated into said substrate.

6. An article according to claim 5 wherein said conditioning component comprises at least one material selected from the group consisting of fatty acids, esters of fatty acids, fatty alcohols, ethoxylated alcohols, polyol polyesters, glycerin mono-esters, glycerin polyesters, epidermal and sebaceous hydrocarbons, lanolin, straight and branched hydrocarbons, silicone oil, silicone gum, vegetable oil, vegetable oil adduct, hydrogenated vegetable oils, nonionic polymers, natural waxes, synthetic waxes, polyolefinic glycols, polyolefinic monoester, polyolefinic polyesters, cholesterols, cholesterol esters and mixtures thereof.

7. An article according to claim 6 wherein said conditioning component comprises at least one material selected from the group consisting of paraffin, mineral oil, petrolatum, cholesterols, cholesterol esters, stearyl alcohol, cetyl alchohol, cetearyl alcohol, behenyl alcohol, C10-30 polyesters of sucrose, stearic acid, palmitic acid, behenic acid, oleic acid, linoleic acid, myristic acid, lauric acid, ricinoleic acid, steareth-1-100, cetereath 1-100, cholesterols, cholesterol esters, glyceryl tribehenate, glyceryl dipalmitate, glyceryl monostearate, trihydroxystearin, ozokerite wax, jojoba wax, lanolin wax, ethylene glycol distearate, candelilla wax, carnauba wax, beeswax, silicone waxes.

8. An article according to claim 6 wvherein said anionic lathering surfactant is selected from the group consisting of sarcosinates, sulfates, isethionates, phosphates, taurates, lactylates, glutamates and mixtures thereof;

wherein said nonionic lathering surfactant is selected from the group consisting of amine oxides, alkyl glucosides, alkyl polyglucosides, polyhydroxy fatty acid amides, alkoxylated fatty acid esters, sucrose esters, and mixtures thereof; and

wherein said amphoteric lathering surfactant is selected from the group consisting of betaines, sultaines, hydroxysultaines, alkyliminoacetates, iminodialkanoates, aminoalkanoates, and mixtures thereof.

9. An article according to claim 6 which is substantially dry prior to use.

10. An article according to claim 6 wherein said water-insoluble substrate is dual sided, comprising a first portion which is wet extensible and a second portion which is less wet extensible than said first portion.

11. An article according to claim 6 wherein said water-insoluble substrate comprises:

(A) a first layer, the first layer being wvet extensible in the plane of the first layer when the first layer is wetted; and

(B) a second layer which is less wet extensible when wetted than is said first layer;

wherein selected portions of said first layer are joined to said second layer in a manner which is sufficient to inhibit wet extension of said first layer in the plane of said first layer.

12. The article of claim 11 wherein said first layer is apertured and has a wet extensibility of at least about 4 percent.

13. The article of claim 12 wherein said first layer comprises a creped paper web and said second layer comprises a nonwoven web which is non-apertured.

14. The article of claim 13 wherein selected portions of said first substrate layer are adhesively bonded to said second substrate layer to provide a plurality of generally parallel, spaced apart bonded regions and a plurality of generally parallel, spaced apart unbonded regions within said substrate.

15. The article of claim 14 wherein selected portions of said first substrate layer are adhesively bonded to said second substrate layer to provide a continuous network bonded region which defines a plurality of discrete unbonded regions.

16. An article according to claim 1 wherein the article is capable of generating an Average Lather Volume of greater than or equal to about 30 ml upon wetting.

21. An article according to claim 1 wherein the fibers are formed into a sheet, mat, or pad layer.

22. An article according to claim 1 wherein said nonwoven is made by a hydroentanglement process, a thermally bonding or thermo-bonding process, or a combination of such processes.

23. An article according to claim 22 wherein said nonwoven is made by a hydroentanglement process.

24. An article according to claim 1 wherein said apertures are hydroapertured.

25. An article according to claim 1 wherein said nonwoven comprising a collection of fibers is made by air-laying, water-laying, meltblowing, coforming, spinbonding, or carding processes in which the nonwoven fibers are cut to desired lengths, passed into a water or air stream, and then deposited onto a screen or belt through which the fiber-laden air or water is passed.

26. An article according to claim 1, wherein said substrate has rounded corners, said corner having a radius of from about 2 to 3 cm.

17. A method of manufacturing a disposable, single use personal care cleansing article comprising the step of adding at least one lathering surfactant onto or impregnating at least one lathering surfactant into water-insoluble substrate having a cleansing surface which contains apertures ranging in average diameter from about 0.5 mm to about 5 mm and having a frequency of from about 0.5 to about 12 apertures per linear centimeter, and wherein said resulting article is substantially dry.

18. A method according to claim 17 wherein said water-insoluble substrate has a first portion which is wet extensible and further having a second portion which is less wet extensible than said first portion.

19. A method of cleansing the skin or hair with a personal cleansing article, comprising the steps of:

(A) wetting with water a substantially dry, disposable, single use personal cleansing article comprising;

(i) a water insoluble substrate having a cleansing surface containing apertures ranging in average diameter from about 0.5 mm to about 5 mm and having a frequency from about 0.5 to about 12 apertures per linear centimeter; and

(ii) at least one lathering surfactant, and

(B) contacting the skin or hair with said wetted article.

20. A method according to claim 19 wherein said article further comprises a conditioning agent for skin or hair.