Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Wearing apparel – fabric – or cloth
Reexamination Certificate
1999-05-25
2001-08-28
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Wearing apparel, fabric, or cloth
C424S400000, C424S401000, C424S443000, C428S311110
Reexamination Certificate
active
06280757
ABSTRACT:
TECHNICAL FIELD
The present invention relates to disposable personal cleansing articles useful for cleansing, and optionally conditioning, the skin or hair, and more particularly to a disposable cleansing, article having a substrate, comprising either single or multiple layers, which contains a plurality of apertures along with a lathering surfactant component. These articles are used by the consumer by wetting the article, which may be dry, with water and by thereafter forming a lather by rubbing the article against itself and/or against skin or hair.
BACKGROUND OF THE INVENTION
Personal cleansing products have traditionally been marketed in a variety of forms such as bar soaps, creams, lotions, and gels. These cleansing formulations have attempted to satisfy a number of criteria to be acceptable to consumers. These criteria include cleansing effectiveness, skin feel, mildness to skin, hair, and ocular mucosae, and lather volume. Ideal personal cleansers should gently cleanse the skin or hair, cause little or no irritation, and not leave the skin or hair overly dry after frequent use. Personal cleansing products are frequently used with, or marketed in the form of, articles that employ a substrate or other implement that carries a cleansing material or is used to deliver a cleansing material to the skin or hair.
Traditional forms of personal cleansing products and articles may be very useful for providing efficacious cleansing and lathering. Such conventional products and articles, however are less suitable for also simultaneously providing other desirable effects such as delivering a skin or hair conditioning benefit. One solution to this problem is to use separate cleansing and conditioning products or articles. However, this is not always convenient or practical, and many consumers would prefer to use a single article which can both cleanse and condition the skin or hair. In a typical cleansing composition or product, the conditioning ingredients are difficult to formulate because many conditioners are incompatible with the surfactants, resulting in an undesirable non-homogenous mixture. To obtain a homogeneous mixture with conditioning ingredients, and to prevent the loss of conditioning ingredients before deposition, additional ingredients, e.g. emulsifiers, thickeners, and gellants are often added to suspend the conditioning ingredients within a surfactant mixture. This results in an aesthetically pleasing homogenous mixture, but often results in poor deposition of conditioning ingredients onto skin or hair because the conditioners are emulsified and not efficiently released during cleansing. Also, many conditioning agents have the disadvantage of suppressing lather generation. Lather suppression is a problem because many consumers seek cleansing articles that provide a rich, creamy, and generous lather.
Therefore, it is seen that conventional cleansing products and articles which attempt to combine surfactants and other materials such as conditioning ingredients suffer from disadvantages inherently resulting from the incompatibilities of surfactants and conditioners. A need clearly exists to develop cleansing systems which provide effective cleansing, effective lathering and yet can also, if desired, consistently provide other benefits such as sufficient conditioning in a single article.
It is also highly desirable to deliver cleansing and preferably conditioning benefits from a disposable, single use article. Disposable articles are convenient because they obviate the need to carry cumbersome bottles, bars, jars, tubes, and other forms of both cleansing and conditioning articles. Disposable articles are also a more sanitary alternative to the use of a sponge, washcloth, or other cleansing implement intended for multiple reuse, because such implements develop bacterial growth, unpleasant odors, and other undesirable characteristics related to repeated use.
Accordingly, it is an object of the present invention to provide washcloth-like articles for cleansing, and preferably also, conditioning the skin or hair when the articles are used wetted with water and rubbed against the skin or hair.
It is another object of the present invention to provide such cleansing articles which are disposable and intended for single use.
It is another object of the present invention to provide such cleansing articles which are mild to the skin or hair.
It is another object of the present invention to provide such cleansing articles which, upon wetting, are capable of generating especially desirable amounts of lather.
SUMMARY OF THE INVENTION
The present invention relates to disposable, single use personal cleansing articles especially useful for cleansing facial skin. Each such article comprises a) a water-insoluble, non-woven substrate having at least one cleansing surface; and b) from about 0.5% to 250% by weight of the substrate of a lathering surfactant which is releasably associated with the substrate. The cleansing surface of the substrate contains a plurality of apertures which range in size from about 0.5 mm to 5 mm in diameter. These apertures are located within said cleansing surface of the substrate at a frequency of from about 0.5-12 apertures per linear centimeter. Preferred multiple layer cleansing articles of this invention utilize a two-ply substrate wherein one or both plies are apertured. Also preferably at least one of the plies of the substrate is wet extensible and the second ply is less wet extensible than the first ply. Preferred articles are also substantially dry prior to use and contain one or more water-soluble or water-insoluble conditioning agents in addition to the lathering surfactant component.
The present invention also relates to methods for manufacturing cleansing articles of the configuration describe herein. Also, the present invention provides methods for cleansing, and optionally conditioning, the skin or hair using the articles described herein.
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Hasenoehrl Erik J.
McAtee David M.
Allen George W.
Hilton Michael E.
McQueeney P. E.
Page Thurman K.
The Procter & Gamble & Company
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