Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Biocides; animal or insect repellents or attractants
Reexamination Certificate
1999-04-22
2002-01-15
Criares, Theodore J. (Department: 1617)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Biocides; animal or insect repellents or attractants
C424S402000
Reexamination Certificate
active
06338855
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a substantially dry, disposable, personal cleansing article useful for both cleansing the skin or hair and delivering skin care actives to the skin or hair. These articles are used by the consumer by wetting the dry article with water, producing lather from the article, and contacting the skin with the lathered article in the normal use of cleansing the skin. These articles comprise a water insoluble substrate, at least one lathering surfactant, and at least one skin care active.
Use of the substrate enhances lathering at low surfactant levels, increases cleansing and exfoliation, optimizes delivery and deposition of the skin care active ingredients, and provides desirable characteristics such as texture, thickness and bulk. As a result, this invention provides effective cleansing using low, and hence less irritating, levels of surfactant while providing superior delivery of skin care actives to the skin or hair.
The invention also encompasses articles comprising various skin conditioning agents for delivery to the skin or hair.
The invention also encompasses a method for consistent deposition of skin care actives to the skin or hair.
The invention also encompasses a method for simultaneously cleansing the skin or hair and delivering skin care actives onto the skin or hair using the articles of the present invention and also to methods for manufacturing these articles.
BACKGROUND OF THE INVENTION
Personal cleansing articles 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.
However, these traditional forms of personal cleansing articles have the inherent problem of balancing cleansing efficacy against delivering a skin care benefit. One solution to this problem is to use separate cleansing and skin care articles. However, this is not always convenient or practical and many consumers would prefer to use a single article which can both cleanse and deliver skin care benefits. In a typical cleansing composition the skin care ingredients are difficult to formulate because many skin care actives are incompatible with the surfactants, resulting in an undesirable non-homogenous mixture. To obtain a homogeneous mixture with skin care ingredients, and to prevent the loss of skin care ingredients before deposition, additional ingredients, e.g. emulsifiers, thickeners, and gellants are often added to suspend the skin care ingredients within the surfactant mixture. This results in an aesthetically pleasing homogenous mixture, but often results in poor deposition of skin care ingredients, because the skin care ingredients are emulsified and not efficiently released during cleansing. Also, many skin care 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 articles which attempt to combine surfactants and skin care ingredients suffer from disadvantages inherently resulting from the incompatibilities of surfactants and skin care ingredients. A need clearly exists to develop cleansing systems which provide effective cleansing and yet consistently provide sufficient skin care benefits in a single article.
It is also highly desirable to deliver cleansing and skin care 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 personal care products. 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.
It has been surprisingly found in the present invention that articles can be developed to provide effective cleansing and consistent delivery of skin care actives in a convenient, inexpensive, and sanitary disposable personal cleansing article having the desirable properties of a washcloth. The present invention provides the convenience of not needing to use both a separate cleansing and skin benefit article. The present invention is highly convenient to use because it is in the form of a substantially dry article that is wetted before use.
The present invention relates to a dry, disposable, personal cleansing article useful for both cleansing the skin or hair and delivering skin care actives to the skin or hair. These articles are used by the consumer by wetting the dry article with water. The articles of the present invention consist of a water insoluble substrate, at least one lathering surfactant, and at least one skin care active. In some embodiments, these articles further contain a deposition aid. Without being limited by theory, it is believed that the substrate enhances lathering at low surfactant levels, increases cleansing and exfoliation, and optimizes delivery and consistent deposition of the skin care ingredients. As a result, this invention provides effective cleansing using low, and hence less irritating, levels of surfactant while providing superior skin care benefits in a consistent and efficient manner. It has also been found that these articles are useful for delivering a wide range of conditioning ingredients to the skin or hair during the cleansing process.
Accordingly, it is an object of the present invention to provide substantially dry washcloth-like articles for both cleansing the skin or hair and delivering a skin care active to the skin or hair, wherein the articles are used in combination with water.
It is another object of the present invention to provide articles which are disposable and intended for single use.
It is another object of the present invention to provide articles which are mild to the skin or hair.
It is another object of the present invention to provide articles useful for delivering conditioning agents to the skin or hair during the cleansing process.
It is another object of the present invention to provide articles which consistently deposit skin care actives and other conditioning agents onto the skin or hair.
It is another object of the present invention to provide methods of cleansing the skin or hair and consistently delivering skin care actives onto the skin or hair.
It is another object of the present invention to provide methods of manufacturing the articles of the present invention.
These and other objects of this invention will become apparent in light of the following disclosure.
SUMMARY OF THE INVENTION
The present invention relates to disposable, single use personal care cleansing and conditioning articles comprising (A) a water insoluble substrate, (B) at least one lathering surfactant added onto or impregnated into said substrate, and (C) a skin care component comprising at least one skin care active selected from the group consisting of water soluble skin care actives, oil soluble skin care actives and mixtures thereof. The skin care active component is also added onto or impregnated into said substrate. These articles are substantially dry before wetting. Upon wetting, however, these articles are capable of generating an Average Lather Volume of greater than or equal to about 30 ml.
In further embodiments, the articles of the present invention further comprise at least one deposition aid added onto or impregnated into said substrate.
In still further embodiments, the present invention relates to methods of manufacturing these disposable, single use personal care cleansing articles. The method comprises the steps of (A) separately
Albacarys Lourdes Dessus
Deckner George Endel
McAtee David Michael
Allen George W.
Criares Theodore J.
Matthews Armina E.
The Procter & Gamble & Company
Tsuneki Fumiko
LandOfFree
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