MXPA01011795A - Absorbent article with skin care composition. - Google Patents

Absorbent article with skin care composition.

Info

Publication number
MXPA01011795A
MXPA01011795A MXPA01011795A MXPA01011795A MXPA01011795A MX PA01011795 A MXPA01011795 A MX PA01011795A MX PA01011795 A MXPA01011795 A MX PA01011795A MX PA01011795 A MXPA01011795 A MX PA01011795A MX PA01011795 A MXPA01011795 A MX PA01011795A
Authority
MX
Mexico
Prior art keywords
skin care
absorbent article
care composition
aliphatic hydrocarbons
skin
Prior art date
Application number
MXPA01011795A
Other languages
Spanish (es)
Inventor
Robert Raymond Schmidt
Original Assignee
Procter & Gamble
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from PCT/US1999/011374 external-priority patent/WO2000069481A1/en
Application filed by Procter & Gamble filed Critical Procter & Gamble
Publication of MXPA01011795A publication Critical patent/MXPA01011795A/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61QSPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q17/00Barrier preparations; Preparations brought into direct contact with the skin for affording protection against external influences, e.g. sunlight, X-rays or other harmful rays, corrosive materials, bacteria or insect stings
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/84Accessories, not otherwise provided for, for absorbent pads
    • A61F13/8405Additives, e.g. for odour, disinfectant or pH control
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/02Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/0208Tissues; Wipes; Patches
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/18Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing inorganic materials
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/34Oils, fats, waxes or natural resins
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61QSPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q19/00Preparations for care of the skin
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15203Properties of the article, e.g. stiffness or absorbency
    • A61F2013/15284Properties of the article, e.g. stiffness or absorbency characterized by quantifiable properties
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15203Properties of the article, e.g. stiffness or absorbency
    • A61F2013/15284Properties of the article, e.g. stiffness or absorbency characterized by quantifiable properties
    • A61F2013/15365Dimensions
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530437Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a part with elevated absorption means
    • A61F2013/530445Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a part with elevated absorption means by defining a target or acquisition or vulnerability zone

Abstract

An absorbent article comprising a body contacting surface and an absorbent core is disclosed. At least a portion of the body contacting surface comprises an effective amount of a skin care composition which is solid or semisolid at 40 ¦C and which is transferable from the body contacting surface to the wearer's skin by contact, normal wearer motion and body heat at a level effective in providing a skin benefit to the wearer's skin. The skin care composition has viscosity of more than about 105 Poise under shear stress of less than about 3X104 dynes/cm2, and viscosity of less than about 102 Poise under shear stress of more than about 106 dynes/cm2, at 40 ¦C.

Description

ABSORBENT ARTICLE WITH COMPOSITION FOR THE CARE OF THE SKIN TECHNICAL FIELD This application relates to absorbent articles that include, but are not limited to, feminine hygiene risks such as sanitary napkins and pantiliners, diapers, training underpants, adult incontinence devices, diaper carriers and the like. More particularly, the present invention relates to absorbent articles having a coating of skin care composition on the surface that makes contact with the body of the absorbent article that is transferable to the wearer's skin.
BACKGROUND OF THE INVENTION. All varieties of absorbent articles configured for the absorption of bodily fluids such as menstrual discharges, urine and faeces, are of course known. With respect to female protection devices, the technique has offered two basic types; sanitary napkins have been developed for external use around the pudendal region while tampons have been developed for internal use within the vaginal cavity for interruption of menstrual flow therefrom. Such buffer devices are described in U.S. Patent No. 4,412,833 entitled "Tampon Applicator", issued to Weigner et al on November 1, 1993, and U.S. Patent No. 4,413,986, entitled "Tampon Assembly With Means For Sterile Insertion", issued for Jacobs on November 8, 1983. Hybrid devices that attempt to merge the structural characteristics of sanitary napkins and tampons into a single device have also been proposed. Such hybrid devices are described in U.S. Patent No. 2,092,346, entitled "Catamenial Pad", issued to Arone on September 7, 1937, and U.S. Patent No. 3, 905, 372. entitled "Feminine Hygiene Protective Shield", issued to Denkinger on September 16, 1975. Other less intrusive hybrid devices are known as lip or interlabial sanitary napkins and are characterized by having a portion that at least partially receives into the user's vestibule and a portion of which at least resides partially external to the user's vestibule. Such devices are described in U.S. Patent No. 2,662,527, entitled "Sanitary Pad", issued to Jacks on December 15, 1953, and U.S. Patent No. 4,631,062, entitled "Sanitary Labial. Pad ", issued to Lassen, et al on December 23, 1986. Interlabial pads have the potential to provide greater freedom from inconvenience due to their small size and reduced spill risk. Numerous attempts have been made in the past to fabricate an interlabial pad that would combine the best characteristics of tampons and sanitary napkins while avoiding at least some of the disadvantages associated with each of those types of devices. Examples of such devices are described in United States Patent No. 2,914,049 issued to Delaney on December 15, 1959, United States Patent No. 3,420,235 issued to Harmon on January 7, 1969, U.S. Patent No. 4,595,392 issued to Jonson, et al on June 17, 1986, and U.S. Patent No. 5,484,429 issued to Vukos, et al on January 16, 1996. A The commercially available interlabial device is the interlabial product FRESH'N FIT® PADETTE which is sold by Atenía Medical Corp. Portland, OR and is described in US Patents 3,983,873 and 4,175,561 issued to Hirschman on October 5 1976, and November 27, 1979, respectively. Although those products such as sanitary napkins, tampons and interlabial pads are generally effective in absorbing menstrual discharges, there is still discomfort that needs to be resolved. For example, the user feels discomfort due to: (1) friction discomfort associated with rubbing the product against the wearer's skin as long as the product is used / applied; (2) adherence of menstrual discharges discharged onto the upper covering of the wearer's skin; and (3) adhesion of the product surface such as a top cover to the wearer's skin. Friction when the product is applied prevents the product from being inserted / applied properly, leading to discomfort. In addition, rubbing the product against the wearer's skin causes itching and / or irritation of the skin. The adherence of the vaginal discharges produces to the user a sensation of disorder / dirt. In addition, the enzyme and / or microbes contained in the adhered menstrual discharges attack the user's skin, thereby causing itching and / or skin irritation. The adhesion of the upper cover produces a sticky feeling for the user. It also prevents the skin of the wearer from having air circulation, thus causing skin hydration. European Patent Application EP 0 692 263 A2, "Meted of reducing the coefficient of friction of absorbent products and wax coated products produced thereby", is directed to lubricated absorbent products that have a coating of a small amount of a solid waxy substance of high molecular weight that has a softening point on body temperature. However, there are disadvantages associated with the use of high molecular weight materials for this purpose. The high molecular weight materials will not be as soothing or lotion-like to the wearer's skin as the materials of lower molecular weight. In addition, high molecular weight materials will not be able to transfer to the wearer's skin to provide the benefits of skin care. High molecular weight waxes can become brittle and tend to peel off or chop an absorbent article due to its lack of flexibility if the absorbent article is of a type that is required to flex and bend. In addition, the softening point to said materials is higher than the ambient temperature, the application of the materials to an absorbent article will be more difficult and will require the material to be heated in order to coat an absorbent article with said material. The problem of dryness of a labial vestibule area of the user has been described in the patent literature. For example, U.S. Patent 4,846,824 issued to Lassen, et al. On July 11, 1989, is directed to a sanitary lip pad having a "physiologically hydrated" cover, i.e., a cover material designed to "maintain a wet interface between the tissues of the vestibule and the pad"). The types of roofing materials specified in the Lassen et al. Patent include a spunlace polyester fiber non-woven material and a rayon cover. The Lassen et al patent states that the covers can be provided with several "coatings" to keep the feature hydrated physiologically, although specific coatings do not appear to be described. Other types of absorbent articles are for example, disposable diapers and underpants or underwear for incontinence to absorb and contain body exudates. Said articles are therefore intended to prevent body exudates from soiling, moistening, or otherwise contaminating clothes or other items such as bedding, which comes into contact with the wearer. The most common mode of failure of such products occurs when the body exudates overflow from the spaces between the article and the legs or waist of the wearer to the adjacent clothes, because they are not immediately absorbed into the article and the absorbent article is not able to maintain a good fit on the user so that spaces are created allowing the exudates to spill out of the article. For example, urine tends to deposit on the upper cover in spills so that urine migrates into the spaces between the article and the user where it may come into contact with clothes or other items and be absorbed by those items. Additionally, the loose fecal material that is not easily absorbed by the absorbent article tends to "float" on the surface that makes contact with the body and makes its way past the spaces between the article and the user's legs or waist. Contemporary disposable diapers have a top cover, a back cover and an absorbent core and one or more folds, typically elastic folds placed to make contact with the wearer's legs and / or waist. These elastic folds have proven to be generally effective to prevent spillage and overflow from the fluid-laden diaper to the clothing that contacts the edges of the diaper since the elastic folds present a barrier between the diaper rim and the clothes. with which it makes contact, and generally, provides an elastic joint action around the legs or waist of the user to maintain a seal around the leg or waist and minimize the formation of spaces. However, due to the forces generated by the elastic members that are concentrated along a narrow area resulting in localized high pressures, such elastic bends have an increased tendency to indentate and mark the skin of the wearer. These skin effects are particularly acute for products used by incontinent infants and adults of the elderly due to the softness of their skin and their sensitivity even to light pressures or rubbing actions. These effects of the skin are even more acute due to the occlusion of the skin caused by these products. The occlusion of the skin by the diaper can potentially lead to over hydration of the skin. As a result, over-hydrated skin is more susceptible to damage from abrasion due to rubbing caused by normal user movements and contact with elastic folds. It is generally known that over hydrated skin is more susceptible to skin disorders, including diaper rash, erythema, thermal rash, abrasion, pressure marks and skin barrier loss. The reduced barrier efficiency of the skin on hydrated and worn out can also cause an increase in diaper rash. (21 CFR 333.503 defines diaper rash as "a condition of the inflammatory skin in the diaper area (perineum, buttocks, lower abdomen and inner thighs) caused by one or more of the following factors: moisture, occlusion, excoriation, continuous contact with urine or feces or both, or mechanical or chemical irritation "). To solve the interests of skin disorders associated with the wearing of diapers and other absorbent articles, the care provider or the user frequently applies protective and / or therapeutic products for the skin to the gluteal, genital, anal and / or anal regions. others before placing the absorbent article on the user. This procedure usually involves the caregiver applying the protective skin product to their hands and then rubbing it over the user's skin. To eliminate the need for this wasteful, messy, time consuming and easily forgotten process, attempts have been made to prepare absorbent articles containing a skin care substance on the top cover of the article. For example, a substance that has been applied to diaper products to impart a soothing protective coating is mineral oil. The mineral oil is a mixture of several liquid hydrocarbons obtained by distillation of the high boiling fractions (i.e. 300 ° -390 ° C) in the petroleum. The mineral oil is liquid at ambient temperatures e.g., 20 ° -25 ° C. As a result, mineral oil is relatively fluid and mobile when applied to diapers. Because mineral oil is still fluid at ambient temperatures, it tends not to remain localized on the surface of the diaper, but instead migrates into the diaper. Consequently, relatively high levels of mineral oil are necessary to be applied to the diaper in order to provide the desired therapeutic or protective coating benefits. This leads not only to increased costs for those treated diaper products, but other deleterious effects as well, including the decreased absorbency of the underlying absorbent core. Even without increasing its level, the tendency of mineral oil to migrate once applied has other harmful effects. For example, the applied mineral oil can be transferred to, into and through the packaging or wrapping material for the treated diaper product. This may create the need for a barrier type packaging or wrapping films to prevent fouling or spillage of the mineral oil from the diaper product. Therefore, it would be desirable to provide an absorbent article having a body contact surface wherein the skin care composition is placed thereon in order to provide the benefits of improved skin care, particularly in the regions of the skin. Skin in contact with the user during use. The skin care composition is preferably as stable as possible before use of the absorbent article so that the skin care composition remains on the body contact surface of the absorbent article. It is also preferable that, once the absorbent article is applied to the wearer's body, the skin care composition is easily transferable to the wearer's skin to provide those benefits to the skin. Therefore, there is a need for an absorbent article having a body contact surface with a skin care composition placed thereon that: (1) provides benefits to the skin; and (2) be as stable as possible before use of the absorbent article as it is transferable to the wearer's skin once the absorbent article is applied to the wearer's body.
BRIEF DESCRIPTION OF THE INVENTION The present invention relates to an absorbent article comprising a body contact surface and an absorbent core. At least a portion of the body contact surface comprising an effectamount of a skin care composition, which is solid or semi-solid at 40 ° C and which is transferable from the body contact surface to the skin of the user by contact, normal user movement and body heat at an effectlevel to provide a benefit to the user's skin. The skin care composition has a viscosity of more than about 105 Poise under a shear stress of less than about 3x104 dynes / cm2, and a viscosity of less than about 102 under shear stress of more than about 106 dynes / cm2, at 40 ° C. The present invention also relates to an absorbent article comprising a body contact surface of an absorbent core. At least a portion of the body contact surface comprises an effectamount of a skin care composition that is solid or semi-solid at 40 ° C and that is transferable from the body contact surface to the wearer's skin by contact, normal user movement and body heat at an effectlevel to provide a benefit to the user's skin. The skin care composition comprises an actskin care ingredient. The skin care composition has a viscosity of more than about 1 O5 Poise under a shear stress of less than about 3x104 dynes / cm2, and a viscosity of less than about 102 Poise under shear stress of more than about 1 O6 dynes / cm2, at 40 ° C.
BRIEF DESCRIPTION OF THE DRAWINGS. While the specification concludes with the claims that point out in a particular way and claim differently the matter in question that is considered to form the present invention, it is considered that the invention will be better understood from the following description taken in conjunction with the accompanying drawings in which: Figure 1 is an absorbent article in the form of a sanitary napkin according to the present invention; Figure 2 is a side cross-sectional view taken along line 2-2 of the sanitary napkin shown in Figure 1; Figure 3 is a side cross-sectional view taken along line 3-3 of Figure 1 through the central portion of one of the fins; Figure 4 is a top plan view of the absorbent article shown in Figure 1 with areas showing skin care composition applied; and Figure 5 is a graph of the shear stress versus the viscosity of an example of the skin care composition.
DETAILED DESCRIPTION OF THE INVENTION. All cited references are incorporated herein by reference in their entirety. The citation of any reference is not an admission with respect to any determination for its availability as a prior art for the claimed invention. "Understanding" means that other stages and other elements that do not affect the final result can be added. This term includes the terms "consisting of" and "consisting essentially".
All percentages, ratios and proportions used herein are by weight unless otherwise specified.
A. Absorbing Article. In the present "absorbent article" refers to devices that absorb and contain body exudates and, more specifically, refers to devices that are placed against the skin of a user to absorb and contain the different exudates discharged from the body. Here, "disposable" is used to describe absorbent articles that are not intended to be washed or otherwise restored or reused as an absorbent article after a single use. Examples of disposable absorbent articles include feminine hygiene undergarments such as sanitary napkins and pantiliners, diapers, incontinence briefs, diaper supports, training underpants and the like. Disposable absorbent articles typically comprise a liquid-impermeable upper cover, a liquid-impermeable back cover attached to the top cover and an absorbent core positioned between the top cover and the back cover. Disposable absorbent articles and components thereof, including the top cover, the back cover, the absorbent core and any individual layers of those components, have a body surface and a garment surface. In the present "body surface" it means that surface of the article or component that is intended to be used towards or adjacent to the user's body, while the "garment surface" is on the opposite side and is intended to be used towards or positioned adjacent to the user's body or undergarments when the disposable absorbent article is used. As used herein, the term "body contact surface" of an absorbent article is one or more surfaces of any item components that contact the user at any time during the period of use. The body contact surface includes, but is not limited to, portions of the top cover, flaps, leg cuffs, waist region, side panels, fastening tabs, etc., which make contact with the user during use. The following description generally discloses the absorbent core, top cover and back cover materials that are useful in disposable absorbent articles, although the disposable absorbent article does not necessarily require having all of them. It is understood that this general description applies to those components of the specific absorbent articles shown in Figures 1-3 and described in detail below, in addition to the other disposable absorbent articles which are generally described herein.
In general, the absorbent core is capable of absorbing or retaining liquids (e.g., menstrual discharges, urine and / or other body exudates). The absorbent core is preferably compressible, conformable and non-irritating to the wearer's skin. The absorbent core can be manufactured in a wide variety of sizes and shapes (eg, rectangular, oval, hourglass, "T", asymmetric, etc.). The absorbent core can include any of a wide variety of liquid absorbent materials commonly used in absorbent articles such as crushed wood pulp, which is generally referred to as air felt. Examples of other absorbent materials suitable for use in the absorbent core include folded cellulose wadding; meltblown polymers including coform; chemically stiffened, modified or interlaced cellulose fibers; synthetic fibers such as plated polyester fibers; peatbog; tizu paper that includes tizu paper wrappers and tizu paper laminates; absorbent foams; absorbent sponges; super absorbent polymers; absorbent gelling materials; or any material or equivalent or combinations of materials or mixtures thereof. The configuration and construction of the absorbent core can also be varied (for example, the absorbent core may have zones of different caliber and / or have a profile to be thicker at its center, hydrophilic gradients, gradients of the absorbent compound, super absorbent gradients; or lower average density and areas of lower average basis weight, eg, acquisition zones, or may comprise one or more layers or structures). The total absorbent capacity of the absorbent core must however be compatible with the design load and intended use of the absorbent article. In addition, the size and absorbent capacity of the absorbent core can be varied to accommodate different uses such as diapers, incontinence pads, pantiliners, regular sanitary napkins and night sanitary napkins and to accommodate users ranging from infants to adults. The absorbent core may include other absorbent components that are frequently used in absorbent articles, for example, a dust coat, a cotton or acquisition gasket, or a secondary top cover to increase user comfort. The upper cover is preferably compliant, soft touch and non-irritating to the wearer's skin. In addition, the top cover is permeable to liquid, which allows liquids (eg menstrual discharge and / or urine) to easily penetrate through its thickness. A suitable top cover can be manufactured from a wide variety of materials such as woven and non-woven materials (e.g., a non-woven fiber web); polymeric materials such as thermoplastic films formed with openings, plastic films with openings and hydroformed thermoplastic films; porous foams; cross-linked foams; crosslinked thermoplastic films; and thin thermoplastic canvases. Suitable woven and nonwoven materials may be comprised of natural fibers (e.g., wood or cotton fibers), synthetic fibers (e.g. polymeric fibers such as polyester, polypropylene or polyethylene fibers) or from a combination of natural fibers and synthetic When the top cover comprises a nonwoven web, the web can be manufactured by a wide variety of known techniques. For example, the weft can be spin-spun, carded, wet-stretched, melt-blown, hydroentangling, combinations of the above or the like. The back cover is impermeable to liquids (eg menstrual discharges AND / or urine) and is preferably manufactured from a thin plastic film, although other flexible liquid impermeable materials can also be used. In the present "flexible" it refers to materials that are compatible and that will easily conform to the general outline and shape of the human body. The back cover prevents the exudates absorbed and contained in the absorbent core from wetting articles that come into contact with the absorbent article such as bedding, pantyhose, pajamas and underwear. The back cover can therefore comprise a woven or non-woven material, polymeric films such as polyethylene or polypropylene thermoplastic films, or composite materials such as a film-coated nonwoven material.
A suitable back cover is a polyethylene film having a thickness from about 0.012 mm to about 0.051 mm. Exemplary polyethylene films are manufactured by Clopay Corporation of Cincinnati, Ohio, under the designation P18-1401 and by Tredegar Film Products of Terre Haute, Indiana, under the designation XP-39385. The back cover can be engraved and / or finished in matt form to provide a more clothing-like appearance. In addition, the back cover can allow the vapors to escape from the absorbent core (ie, the back cover is breathable) while preventing the exudates from passing through the back cover. The size of the back cover is determined by the size of the absorbent core and the exact absorbent article design selected. The back cover and the top cover are positioned adjacent to the surface of the garment and to the body surface, respectively of the absorbent core. The absorbent core is preferably joined with the top cover, the back cover or both with any shape as is known by the joining means such as those well known in the art. However, the embodiments of the present invention are contemplated wherein the portions of the complete absorbent core are not attached to the top cover or the back cover or both. For example, the top cover and / or the back cover may be attached to the absorbent core or to each other in any suitable manner known in the art. The term "joined" as used in this specification encompasses configurations in which one element is directly insured to another element by attaching the element directly to the other element; configurations in which the element is indirectly attached to the other element by fixing the element to a member or intermediate members which in turn are fixed to the other element; and configurations in which one element is integral with the other element, that is, one element is essentially part of the other element. The back cover and / or the top cover can be attached to the absorbent core or to each other through a uniform continuous layer of adhesive, an adhesive pattern layer or an arrangement of separate lines, coils or dots of adhesives. The adhesives that have been found to be satisfactory are manufactured by H.B. Fuller Company of St. Paul, Minnesota under the designation HL-1258 or H-2031. The attachment means will preferably comprise an open-pattern network of filaments of adhesive as described in United States Patent 4,573,986, issued to Minetola, et al. On March 4, 1986, and which is incorporated herein by reference. reference. The illustrative attachment means of an open-pattern filament network comprises several lines of adhesive filaments wound in a spiral pattern as illustrated by the apparatus and method disclosed in United States Patent 3,911,173 issued to Sprague, Jr. on October 7, 1975; U.S. Patent 4,785,996 issued to Zwieker, et al on November 22, 1978; and U.S. Patent 4,842,666 issued to Werenicz on June 27, 1989. Each of these patents is incorporated herein by reference. Alternatively, the joining means may comprise thermal joints, pressure joints, ultrasonic joints, dynamic mechanical joints, or any other suitable joining means or combinations of these joining means as is known in the art. The skin care compositions are applied to at least a portion of the body contact surface of the absorbent article. The skin care composition can be applied to a portion or all of the body contact surface. It is preferable to apply the body care composition to the entire body contact surface. further, the skin care composition can be applied to the surface of the garment of the absorbent article is desired. If the skin care composition can be applied in any suitable configuration, such as a plurality of strips, a plurality of wavy lines, a plurality of dots, etc. The details of the skin care compositions are described below. A preferred embodiment of an absorbent article is shown in Figure 1. In Figure 1 there is shown a sanitary napkin which is of a type of female protection devices and is used for external use around the region of the pudendal of the wearer. As shown in Figure 1, the sanitary napkin 20 preferably comprises absorbent means (or "main body portion") 22, and two optional flaps 24. The sanitary napkin 20 has two surfaces, a surface facing the body or "body surface". and a garment surface 20B. The sanitary napkin 20 is shown in Figure 1 as seen from its body surface 20A. The body surface 20A is intended to be used adjacent to the wearer's body. The garment surface 20B is intended to be placed adjacent to the wearer's undergarments when the sanitary napkin 20 is in use. In the embodiment shown in Fig. 1, the "surface contacting the body" includes the body surface 20A.
The sanitary napkin 20 has two centerlines, a main longitudinal centerline L and a main transverse centerline T. The term "longitudinal" as used herein, refers to a line, axis or direction in the plane of the towel sanitary 20 which is generally aligned with (for example approximately parallel to) a vertical plane that bisects a user standing in left and right body halves when the sanitary napkin 20 is in use. The terms "transverse" or "lateral" used herein, are interchangeable, and refer to a line, axis or direction that is located within the plane of the sanitary napkin 20 that is generally perpendicular to the longitudinal direction.
Figure 1 shows that the main body portion 22 of the sanitary napkin 20 comprises the portion of the sanitary napkin without the vanes 24. The main body portion 22 has two separate longitudinal edges 26, two transverse edges or separate ends (or " ends ") 28, which together form the periphery 30 of the main body portion. The main body portion 22 also has two end regions, which are designated first end region 32 and second end region 34. A central region 36 is positioned between the end regions 32 and 33. The end regions 32 and 34 extend outwardly. in the longitudinal direction from the edges of the central region 36 about 1/8 to about 1/3 of the length of the main body portion. A detailed description of the characteristics of a central region and two end regions of a sanitary napkin is contained in U.S. Patent 4,690,680 issued to Higgins on September 1, 1987. The main body portion 22 of the sanitary napkin 20 can be of any thickness, including relatively thick, of intermediate thickness, relatively thin, or even very thin (or "ultra-thin"). An "ultra-thin" sanitary napkin 20 as described in U.S. Patents 4,950,264 and 5,009,653 issued to Osborn preferably have a caliper of less than about 3 mm. The embodiment of the sanitary napkin 20 shown in the drawings is intended to be an example of an ultra-thin sanitary napkin. The main body portion 22 of the sanitary napkin 20 can also be relatively flexible, so that it is comfortable for the wearer. However, it should be understood that the sanitary napkin shown is only one embodiment, and that the present invention is not limited to absorbent articles of the type or having the specific configurations shown in the drawings. Figure 2 shows the individual components of the main body portion 22 of the sanitary napkin 20. the main body portion 22 of the sanitary napkin 20 preferably comprises at least three primary components. These include a liquid permeable top cover 38, a liquid impervious back cover 40 and an absorbent core 42 positioned between the top cover 38 and the back cover 40. Optionally, the absorbent core 42 may include other components such as an acquisition component. 44. The acquisition component 44 may be any separate component placed between the upper cover 38 and an absorbent core 42 or may comprise part of a composite top cover or part of the absorbent core 42. An upper cover 38 which is particularly suitable for use in the sanitary napkins 20 comprises a film formed with openings. Films formed with openings are preferred for the top cover because they are permeable to body exudates, and if formed with openings properly, have a tendency to reduce to allow liquids to pass back through and rewet the skin of the user. Therefore, the surface of the formed film that is in contact with the body remains dry, thereby reducing the body soiling and creating a more comfortable feeling for the wearer. Suitable formed films are described in U.S. Patent 3,929,135, entitled "Absorptive Structures Having Tapered Capillaries," which was issued to Thompson on December 30, 1975; U.S. Patent 4,324,246 entitled "Disposable Absorbent Article Having A Strain Resistant Topsheet", which was issued to Mullane et al, on April 13, 1982; U.S. Patent 4,342,314 entitled "Resilient Plástic Web Exhibiting Fiber-Like Property," which was issued for Radel, et al on August 3, 1982; U.S. Patent 4,463,045 entitled "Macroscopically Expanded Three; -Dimensional Plástic web Exhibiting Non-Glossy Visible Surface and Cloth-Like Tactile Impression, "which was issued for Ahr et al, on July 31, 1984; U.S. Patent 4,780,352 entitled" Covering Structure For Absorbent Hygienic Sanitary Products, and an Absorbent Product Having Such A Covering ", which was issued for Palumbo on October 25, 1988, the United States patent 5,006,394" Multilayer Polymeric Film "which was issued for Baird on April 9 of 1991 and the patent application of the United States of America serial number 08 / 442,935 entitled "Fluid Transport Webs Exhibiting Surface Energy Gradients" sitting on behalf of Oullette, et al; on May 31, 1995 (PCT Publication WO 96/00548, published January 11, 1996). In a preferred embodiment the top cover 38 comprises an apertured formed film made in accordance with United States of America 4,342,314 issued to Radel et al; and 4,463,045 issued to Ahr et al; which is sold in sanitary napkins as the top cover DRI-WEAVE of The Procter & Gamble Company of Cicinnati, OH. Said apertured film is preferably obtained as product No. X-5652 from Tredegar Film Products of Terre Haute, IN. In this preferred embodiment, during the manufacture of the resin used to form the apertured film it is preferably provided with a surfactant incorporated therein. In preferred embodiments of the present invention, the body surface of the top cover 38 is hydrophilic so that liquids will be transferred through the top cover more easily. If the top cover is made of a hydrophobic material, at least the top surface of the top cover is treated to be hydrophilic so that liquids will be transferred through the top cover more easily. This decreases the likelihood that the menstrual fluid will flow out of the upper envelope instead of flowing in and being absorbed by the absorbent core. The body surface of the upper cover 38 can be made hydrophilic by treating it with a surfactant. Suitable methods of treating a topcoat with a surfactant are described in U.S. Patent 4,950,254 issued to Osborn; U.S. Patents 4,988,344 entitled "Absorbent Articles with Multiple Layer Absorbent Layers" issued for Resising, et al on January 29, 1991; and U.S. Patent 4,988,345 entitled "Absorbent Articles with Rapid Acquiring Absorbent Cores" issued for Reising on January 29, 1991. A back cover 40 which is particularly suitable for use in the sanitary napkin 20 comprises a film of polyethylene having a thickness from about 0.012 mm to about 0.051 mm as stated above. A suitable backsheet material is obtained as product No. 18-1401 from Clopay Corporation of Cincinnati, Ohio. A suitable breathable backsheet material is a laminate of an apertured film such as that described in US Pat. No. 3,929,135 issued to Thompson which is inverted so that the smaller openings of the tapered capillaries face the core. absorbent 42 which is laminated in adhesive form to a microporous film such as that described in the United States of America 4, 777,073 from Exxon's. An absorbent core 42 which is particularly suitable for use in the sanitary napkin 20 comprises a nonwoven material spread to the multiple-junction air. In this preferred embodiment, this nonwoven web stretched to the multiple bond air comprises about 52% cellulose fibers, about 20% bicomponent fibers, about 25% particles of super absorbent hydrogel formation material (or absorbent gelling material). , and approximately 3% latex binder. The absorbent core 42 preferably has a weight basis of about 150 g / m2 which includes the particles of absorbent gelling material. Preferably, this non-woven absorbent core stretched to the multiple-bond air 42 is formed by depositing three streams of cellulose and bicomponent fibers, with absorbent gelling material particles 58 extended with the last fiber stream to form the lower portion of the absorbent core. While the absorbent core 42 is shown as a laminate in Figures 2 and 3, in the preferred embodiments, the fibers are mixed to form an individual weft. Said non-woven material stretched to the multiple-junction air is preferably obtained in roll form as the product 915000X313 from Merfin Hygienic Products. In alternative embodiments, the nonwoven web laid to the multi-junction air used for the absorbent core can be joined using some material other than latex (such as starch or PVA, for example). In another alternative embodiment, the absorbent core can be formed as a laminate preferably having a weight basis of about 150 g / m2 and comprising two (or more) layers of nonwoven material spread to the multiple-bonding air with the particles of absorbent gelling between them. Suitable laminated absorbent core structures are generally described in U.S. Patents 4,950,264 and 5,009,653 issued to Osborn, U.S. Patent 5,460,623 issued to Emenaker, et al. Another suitable absorbent core is disclosed in U.S. Patent Application Serial No. 08 / 122,114, entitled "Sanitary Napkin Having Core Predisposed To A Convex Upward Configuration", filed in the name of Hiñes, et al on 16 September 1993 (PCT Publication No. WO 95/07674, published March 23, 1995). In the case of sanitary, thick towels, the absorbent core 42 is preferably comprised of air felt. Suitable absorbent cores for thicker sanitary napkins are described in U.S. Patent 5,234,422 issued to Sneller, et al. In a preferred embodiment, to the top cover 38, the acquisition component 44 and the absorbent core 42 can be provided with engraved channels as shown in the Sneller Patent, et al. If such engraved channels are used, they are preferably located laterally outside the longitudinally oriented concave lines 56A defining the sides of the unattached window 54.
The absorbent core 42 optionally includes an acquisition component 44. The acquisition component 44 can be made from any suitable materials. The acquisition component 44 can, for example, be comprised of woven or non-woven materials. The fibers or other components of these materials can be synthetic, or partially synthetic and partially natural. Suitable synthetic fibers include polyester, polypropylene, polyethylene, nylon, viscose rayon or cellulose acetate fibers. Suitable natural fibers include cotton, cellulose or other natural fibers. The acquisition component 44 may also be at least partially comprised of interlaced cellulose fibers. The acquisition component 44, if it is of the non-woven type, can be made from a number of different processes. These include, but are not limited to: air casting, wet casting, meltblowing, spinning, carding, thermal bonding, air binding, powder binding, latex bonding, solvent bonding, spinning lace. , and combinations of the above. An acquisition component 44 that is particularly suitable for use in the sanitary napkin 20 comprises a laminate of two non-woven materials. The top layer preferably comprises a 22.5 g / m2 spunbond polypropylene nonwoven material referred to as the product No. 065MLPV60U ("P-9") obtained from Fiberweb, North America of Washsougal, WA. The underlying layer preferably comprises a nonwoven material stretched to the multi-junction air which is thermally bonded using powder binding and latex bonding. In a preferred embodiment, this nonwoven web stretched to the multiple bond air comprises about 77% cellulose fibers, about 20% binder powder and about 3% latex binder (1.5% sprayed on each side of the screen) and it has a basis weight of approximately 60 g / m2. Said nonwoven web laid to the multi-junction air is preferably obtained as the product No. 90830X312 from Merfin Hygienic Products, Ltd of Delta, British Columbia, Canada. These two non-woven layers are preferably laminated together by depositing the non-woven material laid to the multi-junction air on the spun-spun polypropylene non-woven material. The spunbond material is used as a process aid or carrier web in the process of forming this laminate. In alternative embodiments, the spunbond polypropylene nonwoven material may have a greater or lesser basis weight, or may be replaced by an airlaid tissue paper, a wet laid tissue paper or any of the materials described above. If wet-laid tissue paper is used instead of a non-woven polypropylene material, the orientation of the laminate is preferably reversed so that in the finished product, the non-woven material stretched to the multiple-junction air is located on the layer of tissue paper wet laid. In the case of thicker sanitary napkins, any of the acquisition components described above can be used. Additionally, in a preferred thicker sanitary napkin embodiment, an airlaid material attached with low density latex can be used as the complete acquisition component (ie, the tertiary topcoat is not required). An air-laid material bonded with low density latex suitable for this purpose is a material having a basis weight of about 80 g / m2 known as product No. FG413MHB, which is obtained from Waikisoft, USA of Mt. Holly, NC The top cover 38, the back cover 40, and the absorbent core 42 can be assembled in a variety of configurations known in the art (including layered or "interleaved" configurations and wrapped or "tube" configurations). Figures 1-3 show a preferred embodiment of the sanitary napkin 20 assembled in an interleaved construction. In figures 1-3, the upper cover 38 and the rear cover 40 have length and width dimensions generally greater than those of the absorbent core 42. The upper cover 38 and the rear cover 40 extend beyond the edges of the absorbent core to form portions of the periphery 30. In the embodiment shown in Figures 2 and 3 having the acquisition component 44, the side facing the garment of the upper cover 38 is preferably attached to the side confronting the body of the absorbent core (i.e. the side that confronts the body of the acquisition component 44). If the absorbent core 42 has a layered structure, each layer can be joined to the other, if desired. The acquisition component 44 may be attached to the absorbent core 42 if desired. If these components are joined, they can be joined in any of the ways described above. The back cover 40 is preferably attached to the side facing the garment of the absorbent core 42 by adhesive. The portions of the upper cover 38 and the rear cover 40 that extend beyond the edges of the absorbent core 42 are also preferably joined together. Preferably, in the embodiment shown, those portions of the upper cover 38 and the rear cover 40 are joined using adhesives substantially on the complete portions extending beyond the edges of the absorbent core 42 and a crease seal at the edges. of end 28 of the main body portion 22 where the upper cover 38 and the rear cover 40 are densified by the application of pressure or heat and pressure. The sanitary towel 20 shown in Figures 1-3, as described above, comprises an optional pair of fins 24 that are attached to the main body portion 22. The fins 24 extend laterally outwardly beyond the longitudinal side edges. 26 of the main body portion 22 from its proximal edges 60 towards the distant edges (or "free end") 62.
The fins 24 extend outwardly from at least the central region 36 of the main body portion 22. The fins 24 may be attached to the main body portion 22 in any suitable manner. Preferably, in the embodiment shown in Figures 1-3, the fins are integral with the main body portion 22 (ie, the fins 24 comprise integral extensions of the upper cover 38 and the rear cover 40). In other alternative embodiments, the fins 24 may comprise separate components that are attached to the main body portion 22. The fins 24 are each attached to (or associated with) the main body portion 22 along a joint. This is typically a longitudinally oriented (or "longitudinal") junction, such as junction lines 68. As used herein, the terms "junction" (or "junction line") refers to regions where the fins 24 they extend from or are attached to the main body portion 22. The connecting line 68 in the embodiment illustrated in the drawings can be considered to be defined by concave inward oriented regions or lines. When the sanitary napkin 20 is worn by the wearer, the flaps 24 are folded under the wearer's undergarment. The flaps 24 are typically folded along or adjacent the proximal edges 60. If the width of the crotch of the wearer's garment is less than that of the main body portion 22, the flaps 24 can be folded as desired. lengthwise of a longitudinal portion of the main body portion 22 within the proximal edge 60. If the width of the crotch of the wearer's undergarment is greater than that of the main body portion 22, the vanes 24 can be folded as desired. along a joint 70 of the main body portion 22 which is described below. The fins 24 may be in any suitable configuration. Suitable fins are described in Re-examined Patent No. B1 4,589,876 entitled "Sanitary Napkin", issued to Van Tilburg, Certificate of Reexamination issued on April 27, 1993; U.S. Patent 4,687,478 entitled "Shaped Sanitary Napkin With Flaps", which was issued to Van Tilburg on August 18, 1987; U.S. Patent 5,389,094 entitled "Absorbent Article Having Flaps and Zones of Differential Extensibility" issued to Lavash, et al on February 14, 1995; U.S. Patent 5,558,663 entitled "Absorbent Article Underlying Covering Components With Zones of Extensibility" issued to Weinberger, et al on September 24, 1996 (which describes an alternative for fins that are applied by the user); and in International Patent Application Serial Number PCT US 96/15957 entitled "Absorbent Article Having Flaps With Step Configuration and Zones of Extensibility" filed on October 3, 1996, in the name of Lash, et al. The garment surface 20B of the sanitary napkin 20 may include, and preferably includes, fasteners for attaching the sanitary napkin to the wearer's undergarment. Figure 2 shows the central pad holder 82 which is adapted to secure the main body portion 22 of the sanitary napkin to the crotch region of an undergarment. Any types of fasteners known in the art, such as adhesive fasteners and mechanical fasteners, can be used. Fasteners comprising adhesive have been known to function adequately for this purpose, with pressure sensitive adhesives being preferred. In a preferred embodiment, the central pad holder 82, comprises a pair of strips or longitudinally oriented and spaced areas of adhesive that are centered around the longitudinal centerline L. The outer surface of the fins 24, adjacent the distant edges 62 of the fins is preferably provided with a fin adhesive 84. The fin adhesive 84 is used to help keep the fins 24 in position after they are wrapped around the edge of the crotch portion of the fins. the panties Suitable adhesive fasteners are described in greater detail in U.S. Patent 4,917,697. The fins 24 can be held in position by joining the fins 24 to the inner garment or to the opposite fin. The fasteners are not limited to the adhesive bonding means. Any type of fastener used in the art can be used for this purpose. For example, the sanitary napkin 20 can be secured to the wearer's undergarment through mechanical fasteners such as VELCRO, the fasteners described in United States Patent 4,946,527 entitled "Pressure-Sensitive Adhesive Fastener and Method of Making the Same "issued for Battrell on August 7, 1990, or U.S. Patent 5,392,498 entitled" Non-Abrasive Skin Friendly Machanical Fastening System "issued to Goulait, et al on February 28, 1995. However, for simplicity, the fasteners are described in terms of adhesive bonding means. The adhesive bonding means are respectively covered by the removable release liners, the central pad release liner and the fin release liner, both designated as 86. The pressure sensitive adhesives must be covered with releasable liners 86 to avoid that the adhesives adhere to foreign surfaces before use. Suitable release liners are described in United States Patent 4,917,697. A particularly preferred release liner that also serves as an individual package for wrapping the sanitary napkin is described in U.S. Patent 4,556,146 issued to Swanson et al. The sanitary napkin 20 shown in Figures 1-3 may have a deformed region that forms a hinge 70 between the main body portion 22 and at least a portion of the flaps 24. The sanitary napkin 20 preferably also possesses at least one extension zone (or "differential extension zone") 72 for releasing stresses on fins 24 when folded around a panty crotch. They are described in PCT publication WO 97/12576 published April 10, 1997 entitled "Absorbent Article Having Flaps With A Deformed Hinge And Zones Of Extensibility" which is incorporated herein by reference. The skin care compositions are applied to at least a portion of the body contact surface of the sanitary napkin 20. The skin care composition can be applied to any portion of the body contact surface of the sanitary napkin 20 If desired, the skin care composition can be applied to a portion of the garment surface of the sanitary napkin 20. In the embodiment shown in Figure 1, the skin care composition is preferably applied to the skin. the entire top cover 38 of the main body portion 22. The skin care composition is also preferably applied to the entire area of the gral top cover 38 of the fins 24. Alternatively, the skin care composition it can be applied only to a portion of the upper cover 38 of the main body portion 22 and / or a portion of the gral upper cover 38 of the alet 24. For example, the skin care composition may not be applied to the area of the fins 24 that is not expected to contact the wearer's skin in a condition of normal use of the sanitary napkin 20 (e.g. the distant area 91 of the flap 24 which is adjacent the distant edge 62 (refer to Figure 4)). Nevertheless, if the skin care composition is selectively applied to a portion of the sanitary napkin, it is preferable that the skin care composition be applied to the wing folding area 90 where the vanes 24 are expected to be folded The skin care composition applied to the flap folding area 90 of the sanitary napkin 20 reduces the discomfort of the wearer such as itching and / or abrasion due to rubbing the flap folding area 90 of the sanitary napkin 20 against the user's skin. If the skin care composition is selectively applied to a portion of the sanitary napkin, it is also preferable that the skin care composition be applied to the longitudinal end areas 92 and 94 of the sanitary napkin 20. The care composition for the skin applied to the front end area 92 of the sanitary napkin 20 tends to reduce itching in the front region of the sanitary napkin 20 (which corresponds to the portion of the wearer's body around the pubic hair). The skin care composition applied to the back end area 94 of the sanitary napkin 20 tends to reduce the adhesion of the sanitary napkin to the skin of the wearer in the back region of the sanitary napkin 20 (which corresponds to the portion of the sanitary napkin 20). body of the user around the rectum). It is also preferable that the skin care composition is applied to the central area 96 of the sanitary napkin 20. The skin care composition applied to the central area 96 of the sanitary napkin 20 tends to reduce the adhesion of the sanitary napkin to the skin of the wearer in the central region of the sanitary napkin 20 (which corresponds to the portion of the wearer's body around the vulva). In another embodiment, if the sanitary napkin 20 has folds along the longitudinal side edges 26, the surface of the pleats can be treated with the skin care composition. Many other embodiments of the sanitary napkin 20 are possible. For example, the main body portion of the sanitary napkin may be provided in the form of a sanitary napkin having its components attached as described herein for improved integrity and acquisition. . General descriptions of composite sanitary napkins are found in U.S. Patent 4,425,130 of P &; G's entitled "Compound Sanitary Napkin" issued for DesMarais, et al on January 10, 1984, and in Statutory Invention Record H1614 entitled "Body Fitting Compound Sanitary Napkin", published on behalf of Mayer, et al on November 5, 1996. For forming the composite sanitary napkin, a sanitary napkin such as that described herein can serve as the panty-protector (or "base pad") and the tube of the absorbent material rolled up by an upper covering (or "primary menstrual pad"). ) can be placed on top of the sanitary napkin and joined at the ends. The fusion bond on the base pad is preferably distributed in the same manner as shown in the drawings herein. The connection of the tube to the sanitary napkin is preferably achieved by melt-bonding extensions of the upper cover material at the ends of the tube to the base pad. In some preferred embodiments of said composite sanitary napkin, there may also be a join between the ends of the absorbent material tube and the base pad. The composite sanitary napkin tube may be attached to the base pad between its ends through which suitable attachment means, such as adhesives, may be desired. The skin care composition can be applied to the surface contacting the user with other types of absorbent articles. Such absorbent articles having a body contact surface include, but are not limited to, tampons, interlabial absorbent articles, pantiliners, incontinence articles, diapers including infant diapers, training underpants, adult incontinence diapers, etc. In the present "tampon" refers to any type of absorbent structure that is inserted into the vaginal canal or other body cavities for the absorption of fluid therefrom. The basic buffer structures are described in the Patents of the United States of America 1,926,900 issued to Haas on September 12, 1933; U.S. Patent 1,946,911 issued to Haas on July 3, 1934; and U.S. Patent 3,322,123 issued to Giswold, et al on May 30, 1967.
In the present "interlabial absorbent article" it refers to an absorbent device that is insertable within the interlabial space of a wearer for menstrual purposes, protection against incontinence or both. Suitable interlabial absorbent articles are described, for example, in U.S. Patent 5,762,644 entitled "Toilet-Disposable Absorbent Interlabial Device" issued to Osborn et al on June 9, 1998; PCT Publication No. WO 98/29078 entitled "Thin Comfortable Interlabial Absorbent Structure" published in the name of Osborn et al on July 9, 1998; US Pat. No. 404,814 entitled "Interlabial Absorbent Device" issued to Mayer on January 26, 1999; U.S. Application Serial Number 09 / 071,425, filed May 1, 1998 in the name of Brown, et al. The terms "pantiprotective" or "panty-protective" refer to absorbent articles that are less bulky than sanitary napkins that are generally worn by women between their menstrual periods. Suitable absorbent articles are described, for example, in U.S. Patent No. 4,738,676 entitled "Pantiliner" issued to Osborn on April 19, 1988. In the present "article for incontinence" it refers to pads, garments. interior (pads held in place by a suspension system of the same type, such as a band or the like), inserts for absorbent articles, capacity enhancers for absorbent articles, underpants, bed pads, and the like regardless of whether they are used by adults or other people with incontinence. Suitable incontinence articles are described, for example, in United States Patent No. 4,253,461 issued to Strickland, et al on March 3, 1981; U.S. Patent No. 4,597,760 and 4,597,761 issued to Buell; the aforementioned United States Patent No. 4,704,115; U.S. Patent No. 4,909,802 issued to Ahr, et al; U.S. Patent No. 4,964,860 issued to Gipson et al on October 23, 1990; and in U.S. Patent Application Serial Number 07 / 637,090 filed by Noel, et al on January 3, 1991 (PCT Publication No. WO 92/11830 published June 23, 1992). In the present "diaper" it refers to an absorbent article generally worn by infants and incontinent persons that is worn around the user's lower torso. Suitable diapers are described, for example, in United States Patent 3,860,003 issued to Buell on January 14, 1975; U.S. Patent 5,151,092 issued to Buell et al on September 29, 1992; U.S. Patent 5,221,274 issued to Buell et al on June 22, 1993; and U.S. Patent 5,554,145 issued to Roe et al on September 10, 1996. In the present "training underpants" it refers to disposable garments having fixed sides and leg openings. The training underpants are placed in position on the wearer by inserting the wearer's legs into the leg openings and sliding the training underpants in position around the wearer's lower torso. Suitable training underpants are described, for example, in U.S. Patent No. 5,246,433, issued to Hasse, et al. On September 21, 1993. The skin care composition can be applied to a portion of a the entire body contact surface of the absorbent articles. For example, the skin care composition may be applied on a portion of or all of the top cover of the absorbent articles. If the absorbent article has other portions in contact with the wearer's skin such as crease, the skin care composition may be applied over a portion or all of those portions. In the present "fold" includes leg folds that include barrier folds, elastic joint folds, combinations and variations thereof; transverse barriers and bags / separators; side panels; as well as waist creases including waist flaps, waistbands, waist cover and unit waist cover / waistbands; and combinations of all or some of those folds. Representative top covers treated with a skin care composition are described, for example, in U.S. Patent 5,643,588, "Diaper Having a Lotion Topsheet," issued to Roe, Bakes & Warner on July 1, 1997; and U.S. Patent 5,635,191, "Diaper Having a Lotioned Topsheet Containing a. Polysiloxane Emolient", issued to Roe & Mackey on June 3, 1997; U.S. Patent 5,609,587, "Diaper Having a Lotioned Topsheet Comprising a Liquid Poiyol Polyester Emollient and an Immobizing Agent" issued to Roe on March 11, 1997; and U.S. Patent 5,607,760, "Disposable Absorbent Article having a Lotioned Topsheet Containing an Emollient and a Poiyol Polyester Immobizing Agent" issued to Roe, March 4, 1997; each of which is incorporated herein by reference. Methods for providing a skin care composition through the repeated use of absorbent articles having said treated top covers are described in United States Patent Application Serial Number 08 / 926,532"A Method For Maintaining or Improving Skin Health ", Eider, et al presented on September 10, 1997; U.S. Patent Application Serial Number 08 / 926,533"A Method For Improving Skin Condition", Van Rijswijck, et al filed September 10, 1997 and U.S. Patent Application 08 / 908,852"Diaper Having A Lotioned Topsheet", Roe et al, filed August 8, 1997; each of which is incorporated herein by reference. Representative folds treated with a skin care composition are described, for example, in U.S. Patent Application 08 / 766,386"Absorbent Articles Having Lotioned Leg Cuffs", Schulte et al., Filed December 3, nineteen ninety six; U.S. Patent Application Serial Number 08 / 840,039"Absorbent Articles Having Lotioned Leg Cuffs Containing to Polysiloxane Emolient", Schulte et al filed on April 24, 1997; U.S. Patent Application Serial Number 08 / 962,310"Absorbent Article Having cuffs and Topsheet with Skin Care Composition Disposed Thetron", Schulte et al filed October 31, 1997; U.S. Patent Application Serial Number 08 / 962,312"Absorbent Article Having Cuts and Topsheet with Skin Care Composition (s) Dispored Thereon", Vanri et al filed on October 31, 1997; each of which is incorporated herein by reference. Representative interlabial absorbent articles treated with a skin care composition are described, for example, in U.S. Patent Application Serial Number 08 / 869,897"Emollient-Treated Absorbent Interlabial Device", Osborn et al, filed on June 5, 1997; U.S. Patent Application Serial Number 08 / 869,700"Absorbent Interlabial Device Treated Whit A Polysiloxane Emollient", Osborn et al, filed June 5, 1997; each of which is incorporated herein by reference. Representative absorbent articles having breathability treated with a skin care composition are described, for example, in U.S. Patent Application Serial Number 08 / 926,566"Disposable Absorbent Articles Providing a Skin Condition Benefit", ELDER et al; submitted on 09/10/97.
B. Skin Care Composition. While the specific skin care composition or compositions (referred to herein as "skin care composition" and "composition") according to the present invention is an important factor in the delivery of the effects To the desirable skin, it is preferred that the skin care composition should provide a non-occlusive protective function (e.g., a relatively liquid impermeable but vapor permeable barrier) to avoid overhydration of the skin and skin exposure. to materials contained in body exudates; a function that minimizes abrasion to reduce skin irritation in areas where the body contact surface of the absorbent articles makes contact with the wearer's skin; or containment agents that provide, either directly or indirectly, skin care benefits. For example, indirect benefits include the improved removal of skin irritants such as menstrual fluids, stools, or urine. The composition may be in a variety of forms including, but not limited to, emulsions, lotions, creams, ointments, ointments, powders, suspensions, encapsulates, gels, and the like. The skin care compositions are solid or semi-solid at 20 ° C and are solid or semi-solid at 40 ° C. Here, "semi-solid" represents the skin care composition having a viscoelastic property (i.e., when shear stress is not applied, the skin care composition has the appearance of a solid. as the shear stress increases, the skin care composition can be made to flow as a fluid). This property ensures the stability of the skin care composition under static conditions (e.g. under the condition where the product is in storage and / or transportation) and maximizes the availability of the skin care composition transferred to the skin. skin for the effects of the skin under mechanical shearing stress (for example, in a condition where the product is used by the user and shear stress applied to the skin care composition).
The skin care composition has a viscosity of more than about 105 Poise under a shear stress of less than about 3X104 dynes / cm2, and a viscosity of less than about 102 Poise under a shear stress of more than about 106 dynes / cm2, at 40 ° C. Preferably, the skin care composition has a viscosity of more than about 106 Poise under shear stress of less than about 3X104 dynes / cm2, and viscosity of less than about 101 Poise under shear stress of more than about 106 dynes / cm2, at 40 ° C. Here, 40 ° C represents the temperature at which the skin care composition potentially experiences while the article is in storage or is transported or used in contact with the skin. The shear stress of approximately 3X104 dynes / cm2 represents the maximum shear stress applied to the skin care composition while the article is in storage or transported. The shear stress of approximately 1 O6 dynes / cm2 represents the shear stress applied to the skin care composition at least once while the article is in use. The viscosity of approximately 105 Poise is the lowest viscosity required to prevent the skin care composition from migrating in storage or transportation. The viscosity of more than about 1 O6 Poise is more preferable to prevent the skin care composition from migrating. The viscosity of approximately 102 Poise is the superior viscosity required to obtain effective lubrication between the user's skin and the body contact surface of the article and the transfer of the skin care composition onto the wearer's skin. Viscosity of less than about 101 Poise is more preferable for effective lubrication and transfer of the skin care composition. Viscosity at different shear stress should be measured using available rheometers such as rheometer type cone to plate or plate to plate (for example, the rheometer SR-2000, Rheometrics Ine), at 40 ° C. - Figure 5 shows a graph of shear stress versus viscosity of an example of the preferred skin care composition. When the skin care composition has a viscosity of more than about 105 Poise under the shear stress of less than about 3X104 dynes / cm2 at 40 ° C, the skin care composition has a lower tendency to migrate within of the interior of the article of storage or transportation and has a greater tendency to remain on the body contact surface of the article. When the skin care composition has a viscosity of less than about 1 O2 Poise under shear stress of more than about 106 dynes / cm2 at 40 ° C, the skin care composition has a greater tendency to transfer towards the skin. the skin of the user. Therefore, the skin care composition tends to remain stable on the body contact surface of the article in storage or transportation, thus requiring a lower initial amount of skin care composition placed on the body contact surface . Once the absorbent article is used by the user, the skin care composition is exposed to higher shear stress than the shear stress in storage or transportation. In this way, the skin care composition begins to flow and the efive amount of skin care composition is transferred to the skin of the user. Herein, the term "efive amount of skin care composition" refers to an amount of a particular composition, which when applied or migrated toward ("placed on") the body contact surface, will be efive for provide the desirable skin efs mentioned above. The skin care compositions also have a consistency of no more than about 300, preferably no more than about 150, more preferably no more than about 100, at 40 ° C. In the present "consistency" represents the resistance against deformation of the skin care composition. When the skin care composition has a consistency of no more than about 300 to 40 ° C, the skin care composition has a greater tendency to remain on the body contact surface of the absorbent article. The consistency can be measured by the penetrometer described in ASTM D5, at 40 ° C. The penetrometer that is used to measure the consistency provided by Petrolab, Company, 874 Albany-Shaker Road, Latham, NY, under the designation PNR-10. The efive amount of composition delivered on the body contact surface will depend, to a greater extent, on the particular skin care composition used, a portion of the body contact surface where the skin care composition is applied and / or a product form (for example, diaper, sanitary napkin, etc.). However, the minimum amount of skin care composition placed on at least a portion of the body contact surface of the absorbent articles preferably will not be less than about 0.0078 mg / cm2, more preferably not less than about 0.0078 mg / cm2. about 0.016 mg / cm2, even more preferably it will not be less than about 0.078 mg / cm2. The maximum amount of skin care composition placed on at least a portion of the body contact surface preferably will not be less than about 12 mg / cm2, more preferably not less than about 3.9 mg / cm2, even more preferably it will not be less than about 0.8 mg / cm2. those ranges are by way of illustration only and the person skilled in the art will recognize that the nature of the composition will determine at what level it should be placed therein to achieve the desired skin efs, and that such levels are determinable through routine experimentation in light of the present disclosure.
Particularly when the skin care composition such as that described in example 1 is applied to the body contact surface (i.e. the upper cover 38 of the main body portion 22 and the fin 24) of the sanitary napkin shown in FIG. Figure 1, the amount of skin care composition placed on the body contact surface ranges preferably from about 0.0078 mg / cm2 to about 3.9 mg / cm2, more preferably from about 0.016 mg / cm2 to about 1.5 mg / cm2, even more preferably from about 0.078 mg / cm2 to about 0.6 mg / cm2. The skin care composition may comprise: (1) one or more emollients (2) one or more immobilization agents to stabilize the emollients (3) one or more active ingredients for skin care, and (4) other components optional Although the type, degree and content of each component of the skin care compositions are arbitrary, the skin care composition including at least one active skin care ingredient satisfies the viscosity of more than about 150 Poise. under shear stress of less than about 3X104 dynes / cm2, and the viscosity of less than about 1 O2 Poise under shear stress of more than about 106 dynes / cm2, at 40 ° C. In particular, when the skin care composition comprises emollients and immobilizing agents, the selected ranges of the amount of emollients and immobilizing agents help achieve the above viscosity range. That is, the skin care composition comprising from about 40 to about 90% of the emollient. Preferably, the skin care composition comprises from about 50 to about 85%, more preferably from about 60 to about 80% of the emollient. The skin care composition comprises from about 10 to about 60% of the immobilizing agent. Preferably, the skin care composition preferably comprises from about 15 to about 50%, more preferably from about 20 to about 40% of the immobilizing agent. 1. Emollient. A key component of the skin care composition is one or more emollients. The emollients are selected from materials that soften, regulate, coat, moisturize, lubricate or cleanse the skin. In general, an emollient simultaneously achieves several of the objectives such as softening, moisturizing and lubricating the skin. The emollient preferably has a viscosity consistency at 20 ° C. However, this is not essential insofar as the skin care composition such as the combination of emollients and the other components (eg, immobilizing agents) satisfies the viscosity described above.
The emollients are also substantially free of water. In the present, substantially free of water means that the water is not intentionally added to the emollients. The addition of water to the emollients is not necessary in the preparation or use of the skin care compositions. However, minor or trace amounts of water in the emollient that are contained as a result of ambient humidity can be tolerated without adverse effect. Commonly, emollients contain about 5% or less of water, preferably about 1% or less of water, more preferably about 0.5% or less of water. The emollients are preferably hydrophobic so that sweat, feces and / or menstrual discharges form a greater contact angle against the emollient than against the skin and / or the top cover of the article. The hydrophobic emollient reduces wetting of sweat, feces and / or menstrual discharges against the skin and / or top cover of the article, thus reducing the sticky feeling on the user's skin. Emollients include those based on petroleum, the type of fatty acid ester, the type of alkyl ethoxylate, fatty acid ester ethoxylates, fatty alcohol type, polysiloxane type, or mixtures thereof. Emollients based on petroleum include petrolatum. Petrolatum is a mixture of haliphatic hydrocarbons having an alkyl chain length of 16 or more and inherently possessing an appearance and feel to the jelly feel. Petrolatum is also sometimes classified as a mixture of mineral oil and microcrystalline wax. Herein, the mineral oil refers to a fraction of the petrolatum having less viscous mixtures of hydrocarbons having an alkyl chain length of 16 to 24. In the present, the microcrystalline wax refers to a fraction of the petrolatum having more viscous mixtures of hydrocarbons having an alkyl chain length of 25 or more. The petrolatum as the emollient provides the softness of the skin due to its feeling to the touch of jelly. Likewise, the petrolatum as the emollient coats the skin or can be absorbed by the skin, resulting in skin moisturization. The petrolatum contains heavy aliphatic hydrocarbons and light aliphatic hydrocarbons. Heavy aliphatic hydrocarbons and light aliphatic hydrocarbons may be defined by the alkyl chain length of the petrolatum alkanes including isomers and normal chain. Petrolatum light aliphatic hydrocarbons tend to migrate faster than heavy aliphatic petrolatum hydrocarbons because of the molecular weight and diameter of the molecules that determine the flow property (ie, viscosity) and the diffusion rate of the aliphatic hydrocarbons. Therefore, it is preferable that the heavy aliphatic hydrocarbons are present to a greater extent than the light aliphatic hydrocarbons in the petrolatum. The amount of heavy aliphatic hydrocarbons and light aliphatic hydrocarbons is comparable in weight ((weight = (the number of molecules) x (molecular weight of molecules)) The reduction of light aliphatic hydrocarbons helps to reduce the migration of petrolatum. , too many heavy aliphatic hydrocarbons can make the skin care composition too difficult for it to flow in. Therefore, the balance between the amount of heavy aliphatic hydrocarbons and the amount of light aliphatic hydrocarbons must be achieved. heavy aliphatic hydrocarbons having an alkyl chain length from 33-36 more than light aliphatic hydrocarbons having an alkyl chain length of 23-26, in this case, the ratio of heavy aliphatic hydrocarbons to light aliphatic hydrocarbons is preferably between 2.0: 1.0 and 1.0: 1.0, more preferably between 1.5: 1 .0 and 1.0: 1.0 More preferably, the petrolatum has the heavy aliphatic hydrocarbons having an alkyl chain length of 30-36 more than the light aliphatic hydrocarbons having a chain length of 20-26. In this case, the ratio of heavy aliphatic hydrocarbons to. Light aliphatic hydrocarbons are preferably between 2.5: 1.0 and 1.0: 1.0, more preferably between 2.0: 1.0 and 1.0: 1.0. Even more preferable, the petrolatum has the heavy aliphatic hydrocarbons having an alkyl chain length of 27-36 more than the light aliphatic hydrocarbons having an alkyl chain length of 17-26. In this case, the ratio of heavy aliphatic hydrocarbons to light aliphatic hydrocarbons is preferably between 3.5: 1.0 and 1.5: 1.0, more preferably between 3.0: 1. o and 2.0: 1.0. Suitable fatty acid esters include those derived from C ?2-C28 fatty acids, preferably saturated C ?6-C24 fatty acids and short-chain monohydric alcohols (C?-C8), preferably C1-C3). Representative examples of such esters include methyl palmitate, methyl stearate, isopropyl laurate, isopropyl milistate, isopropyl palmitate, ethylexyl palmitate and mixtures thereof. Suitable fatty acid esters can also be derived from esters of longer chain fatty alcohols (C 2 -C 28, preferably C 2 -C 6) and shorter chain fatty acids, for example, lactic acid such such as lauryl lactate and cetyl lactate. Fatty acid esters such as emollients provide softness to the skin. Likewise, fatty acid esters such as the emollients that line the skin, resulting in skin moisturization. Suitable alkyl ethoxylates include fatty alcohol ethoxylates C? -C22 having an average degree of ethoxylation from about 2 to about 30. Preferably, the fatty alcohol ethoxylate is selected from the group consisting of lauryl, cetyl, and stearyl ethoxylates, and mixtures thereof, which have a average degree of ethoxylation ranging from about 2 to about 23. Representative examples of such alkyl ethoxylates include laureth-3 (a lauryl ethoxylate having an average degree of ethoxylation of 3), laureth-23 (a lauryl ethoxylate having a degree of average ethoxylation of 23), cetet-10 (a cetyl alcohol ethoxylate having an average degree of ethoxylation of 10), and steareth-10 (a sterile alcohol ethoxylate having an average degree of ethoxylation of 10). These alkyl ethoxylates as the emollients are commonly used in combination with petrolatum as the emollient, in a weight ratio of alkyl ethoxylate emollient to petrolatum emollient from about 1: 1 to about 1: 5, preferably from about 1: 2 to about 1: 4 Suitable fatty alcohols include C, 2-C2 fatty alcohols, preferably C6-C2 fatty alcohols, more preferably C18-C2 alcohols. Representative examples include cetyl alcohol, stearyl alcohol, behenyl alcohol and mixtures thereof. Those fatty alcohols such as emollients are commonly used in combination with petrolatum as the emollient, in a weight ratio of fatty alcohol emollient to petrolatum emollient from about 1: 1 to about 1: 5, preferably from about 1: 1 to about 1: 2. Other suitable types of emollients include polysiloxane compounds which are sometimes called silicone compounds or silicone polymer compounds. In general, suitable polysiloxane compounds include those having monomeric siloxane units of the following structure: Wherein, Ri and R2, for each monomeric siloxane unit can independently be hydrogen or any alkyl, aryl, alkenyl, alkaryl, arachyl, cycloalkyl, halogenated hydrocarbon or other radical. Any of said radicals can be substituted or unsubstituted. The radicals R, and R2 of any particular monomer unit may differ from the corresponding functionalities of the next adjacent monomer unit. Additionally, the polysiloxane can be a straight chain structure, a branched chain or a cyclic structure. The radicals Ri and R2 can independently and additionally be other silaceous-type functionalities such as, but not limited to, siloxanes, polysiloxanes, silanes and polysilanes. The radicals Ri and R2 may contain any of a variety of organic functionalities including, for example, functionalities of alcohol, carboxylic acid, phenyl and amine. Illustrative alkyl radicals are methyl, ethyl, propyl, butyl, pentyl, exyl, octyl, decyl, octadecyl, and the like. Illustrative alkenyl radicals are vinyl, allyl, and the like. Illustrative aryl radicals are phenyl, diphenyl, naphthyl and the like. The alkaryl radicals are toyl, xylyl, ethylphenyl and the like. Aralkyl radicals are benzyl, alpha af on methyl, beta phenylethyl, abenyl butyl, and the like. Exemplary alkyl cyclo radicals are cyclobutyl, cyclopentyl, cycloexoyl, and the like. Illustrative halogenated hydrocarbon radicals are chloromethyl, bromoethyl, tetrafluoroethyl, fluoroethyl, trifluoroethyl, trifluoroloyl, hexafluoroxylyl and the like. The viscosity of the useful polysiloxanes can vary as widely as the viscosity of the polysiloxanes in general vary, so that the polysiloxane is able to flow or can be made to be capable of flowing for application to the top cover of the article. This includes, but is not limited to, viscosity as low as 5 centistokes (at 37 ° C as measured by a glass viscometer) to approximately 20,000,000 centistokes. Preferably the polysiloxanes have a viscosity at 37 ° C ranging from about 5 to about 5,000 centistokes, more preferably from about 5 to about 2,000 centistokes, more preferably from about 100 to about 1000 centistokes. The high viscosity polysiloxanes which may be resistant to flow may be effectively deposited on the top cover of the article through methods such as, for example, emulsification of polysiloxane in surfactant or providing the polysiloxane in solution with the aid of a solvent, such as exano, listed for illustrative purposes only. Particular methods for applying the polysiloxane emollients on the top cover of the article are described in greater detail hereinafter. Preferred polysiloxane compounds are described in U.S. Patent 5,059,282 (Ampulski et al), issued October 22, 1991, which is incorporated herein by reference. Particularly preferred polysiloxane compounds for use as emollients in skin care compositions include phenyl functional polymethylsiloxane compounds (eg, Dow Corning 556 Cosmetic-Grade Fluid: polyphenylmethylsiloxane) and dimethicones functionalized with cetyl or stearyl such as polysiloxane fluids. Dow 2502 and Dow 2503 respectively. In addition to said substitution with alkyl or phenyl functional groups, the effective substitution can be made with amino, carboxyl, hydroxyl, ether, polyether, aldehyde, ketone, amide, ester and diol groups. Of those effective substituent groups, the family of groups comprising the phenyl, amino, alkyl, carboxyl and hydroxyl groups are more preferred than the others; and phenyl functional groups are more preferred. In addition to the petrolatum emollient, the fatty acid ester emollients, the fatty acid ester ethoxylate emollients, the alkyl ethoxylate emollients, the fatty alcohol emollients and the polysiloxane compound emollients, the emollients may include minor amounts (eg up to about 10% of the total emollients) of other conventional emollients. These other conventional emollients include propylene glycol, glycerin, triethylene glycol, whale white or other waxes, fatty acids and fatty alcohol ethers having from 12 to 28 carbon atoms in their fatty chain, such as stearic acid, propoxylated fatty alcohols; glycerides, acetoglycerides and ethoxylated glycerides of C? 2-C28 fatty acids; other fatty esters of polyhydroxy alcohols; lanolin and its derivatives. Those other emollients should be included in such a way that the solid or semi-solid characteristics of the skin care composition are maintained. The amount of emollient that can be included in the skin care composition will depend on a variety of factors, including the particular emollient involved, the desirable benefits, the component data in the skin care composition and the like. 2. Aqente of Immobilization. Another key component of the skin care compositions are the immobilization agents. Immobilization agents are capable of thickening emollients of skin care compositions. The immobilization agents can be emollient-soluble or emollient-insoluble. Without wishing to be bound by theory, immobilization agents are considered to form microscopic networks in the skin care composition (eg, emollients) to thicken the skin care composition. Herein, "microscopic network" refers to the network whose units are molecules of immobilization agents that are soluble in emollients, or particles of immobilization agents that are insoluble in emollients. Particularly, "microscopic network" of immobilization agent which are soluble in emollients is sometimes referred to as "liquid crystal". In the microscopic network, molecules are particles that form a flexible / weak connection between molecules or particles. The immobilizing agent must be homogeneously dispersed in the skin care composition so that a smaller amount of immobilizing agent is required to impart the expected thickening. The smaller amount of immobilization agent contained in the skin care composition allows a greater amount of emollient, which is one of the active ones for the expected skin effects, in the skin care composition. The immobilization agent homogeneously dispersed in the skin care composition also makes it possible to control the variation in the quality of the skin care composition. Preferably, the immobilization agent has sufficient solubility or sufficient dispersion capacity in the emollient. In most cases and preferred cases, the emollients are hydrophobic. In this case the immobilization agents must also be hydrophobic so that the emollient and the immobilizing agent can achieve a desired homogeneous mixture. Immobilizing agents and emollients are sometimes compounded as long as some of them are molten. The immobilization agents which are soluble in the emollients can be selected from the group consisting of C ?4-C24 fatty alcohols C? 2-C24 ácidos fatty acids and C12--C2 fatty alcohol ethoxylates which have an average degree of ethoxylation which varies from 2 to about 30, and mixtures thereof. Preferred immobilizing agents include Ci6-C2 fatty alcohols, more preferably C ?8-C24 fatty alcohols. Representative examples include stearyl alcohol, arachidyl alcohol, benzyl alcohol, lignoceryl alcohol, and mixtures thereof. As used herein, "stearyl alcohol" refers to a mixed fatty alcohol containing C alcohol 8 fatty alcohol as a major component. As used herein, "arachidyl alcohol" refers to a mixed fatty alcohol containing C20 fatty alcohol as the main component. In the present, "behenyl alcohol" refers to a fatty alcohol containing C22 fatty alcohol as a major component. In the present "lignocarilic alcohol" it refers to a mixed fatty alcohol containing C2 fatty alcohol as a main component. Preferably, the immobilization agent comprises behenyl alcohol. The behenyl alcohol as the immobilizing agent preferably comprises C 2 fatty alcohol as a major component and a minor amount of a C 2 fatty alcohol - the behenyl alcohol may also comprise C 8 fatty alcohol and C 20 fatty alcohol. Containing a lower amount of C24 fatty alcohol in behenyl alcohol, the behenyl alcohol provides the emollients with greater stability and also immobilizes the emollients of the skin care composition more efficiently. When the behenyl alcohol comprises C alcohol8 fatty alcohol, C20 fatty alcohol, C22 fatty alcohol, and C2 fatty alcohol, the ratio of each component is preferably as follows: from about 50% to about 99.99% C2 fatty alcohol, more preferably preferable from approximately 63% to approximately 84.9% C22 fatty alcohol; from about 0.01% to about 3% C2 fatty alcohol, more preferably from about 0.1% to about 2% C2 fatty alcohol; from 0% to about 27% C20 fatty alcohol, more preferably from about 10% to about 20% C20 fatty alcohol; from 0% to about 20% of fatty alcohol C? 8, more preferably from about 5% to about 15% of C? 8 fatty alcohol. One of the preferable behenyl spirits as the immobilizing agent is Lanette 22 available from Henkel Corp. Cospha, 300 Brookside Avenue, Ambler, PA 19002. Other preferred immobilization agents include C? 6-C2 fatty acids, most preferably fatty acids Cl8-C2 selected from the group consisting of stearic acid, behenic acid and mixtures thereof. The most preferred is behenic acid. Even other preferred immobilizing agents include C6-624 fatty alcohol ethoxylates having an average degree of ethoxylation ranging from about 5 to about 20. Preferably, fatty alcohols, fatty acids and linear or fatty alcohols and does not contain branched isomers . Importantly, those preferred immobilization agents such as Cl8-C2 fatty alcohols are assumed to provide the microscopic network in the skin care composition, thereby resulting in the skin care composition being much thicker than just the emollients that are included in the skin care composition. Those preferred immobilization agents such as d8-C2 fatty alcohols are sufficiently soluble to form homogeneous mixtures of the emollients and the immobilizing agents. Other types of immobilizing agents that are soluble in emollients can be used either alone or in combination with the fatty alcohols, fatty acids, and fatty alcohol ethoxylates described above. Examples of those other types of immobilizing agents include polyhydroxy fatty acid esters, polyhydroxy fatty acid amides, and mixtures thereof. The preferred esters and amides will have three or more free hydroxy groups on the polyhydroxy moiety and are typically nonionic in nature. Due to the possible sensitivity of the skin of those who use top cover of article to which the skin care composition is applied, those esters and amides must also be relatively moderate and non-irritating to the skin. Suitable polyhydroxy fatty acid esters will have the formula: Wherein R is a C5-C31 hydrocarbyl group, preferably straight chain C7-C19 alkyl or alkenyl, more preferably straight chain C9-C17 alkyl or alkenyl, more preferably straight chain Cn-C17 alkyl or alkenyl , or a mixture thereof; Y is a polyhydroxy hydrocarbyl moiety having a hydrocarbyl chain with at least 2 free hydroxyls directly connected to the chain; and n is at least 1. Suitable Y groups can be derived from polyols such as glycerol, pentaerythritol; sugars such as raffinose, maltodextrose, galactose, sucrose, glucose, xylose, fructose, conmaltose, lactose, mannose and erythrose; sugar alcohols such as editritol, xylitol, malitol, mannitol and sorbitol; and anhydrides of sugar alcohols such as sorbitan. A class of suitable polyhydroxy fatty acid esters comprises certain sorbitan esters, preferably the sorbitan esters of C 16 -C 22 saturated fatty acids. Due to the manner in which they are commonly manufactured, those sorbitan esters usually comprise mixtures of mono, di, tri, etc., esters. Representative examples of sorbitan esters include sorbitan palmitates (eg, SPAN 40), sorbitan stearates (eg, SPAN 60), and sorbitan behenates, which comprise one or more of the mono, di, and tri ester versions of those esters of sorbitan, for example mono, di, and tripalmitate of sorbitan, mono, di, and tristearate of sorbitan, mono, di, and tribehenato of sorbitan as well as mono, di, and triesters of sorbitan of mixed fatty acid of bait; mixtures of different sorbitan esters can also be used, such as sorbitan palmitates with sorbitan stearates. Particularly preferred sorbitan stearates are sorbitan stearates, typically as a mixture of mono, di and triesters (plus some tetraester) such as SPAN 60, and sorbitan stearates sold under the trade name GLYCOMUL-S by Lonza, Inc. Although those sorbitan esters typically contain mixtures of mono, di, and triesters, plus some tetraesters, the mono and diesters are usually the predominant species in those mixtures. Another class of suitable polyhydroxy fatty acid esters comprises certain glyceryl monoesters, preferably glyceryl monoesters of C, 6-C24 saturated fatty acids such as glyceryl monostearate, glyceryl monopalmitate and glyceryl monobehenate. Again, like the sorbitan esters, the glyceryl monoester mixtures will typically contain some di and triester. However, such mixtures must predominantly contain the glyceryl monoester species to be useful. Another class of suitable polyhydroxy fatty acid esters comprises certain fatty acid esters of sucrose, preferably, the esters of C 2 -C 24 saturated fatty acid of sucrose. Sucrose monoesters and diesters are particularly preferred and include sucrose mono- and di-stearate and sucrose mono- and dilaurate. Suitable polyhydroxy fatty acid amides will have the formula: O R ll I R2- c- N- Z Where R1 is H, C? -C4 hydrocarbyl, 2-hydroxyethyl, 2-hydroxypropyl, methoxyethyl, methoxypropyl or a mixture thereof, preferably C? -C alkyl, methoxyethyl or methoxypropyl, most preferably Ci or C2 alkyl or methoxypropyl, more preferably C, (ie, methyl) or methoxypropyl; and R 2 is a C 5 -C 3 hydrocarbyl group, preferably straight chain C 7 -C 19 alkyl or alkenyl, more preferably straight chain C 9 -C 7 alkyl or alkenyl, more preferably Cn-d alkyl or alkenyl? straight chain or a mixture thereof; and Z is a polyhydroxy hydrocarbyl moiety having a linear hydrocarbyl chain with at least 3 hydroxyls directly connected to the chain. See U.S. Patent 5,174,927 (Honsa), issued December 29, 1992, (incorporated herein by reference) which discloses those polyhydroxy fatty acid amides, as well as their preparation. The Z portion will preferably be derived from a reducing agent in a reductive amination reaction; more preferably glycityl. Suitable reducing sugars include glucose, fructose, maltose, lactose, galactose, mannose and xylose. High dextrose corn oil, high fructose corn syrup and high maltose corn syrup can be used, as well as the individual sugars listed above. These corn syrups can produce mixtures of sugar components for the Z portion. The Z portion will preferably be selected from the group consisting of -CH2- (CHOH) n -CH2OH, -CH (CH2OH) - [(CHOH) n -1] -CH2OH, -CH2OH-CH2- (CHOH) 2 (CHOR3) (CHOH) -CH2OH, where n is an integer from 3 to 5, and R3 is H or a cyclic or aliphatic monosaccharide. The g li citi are most preferred where n is 4, particularly -CH2- (CHOH) 4-CH2OH. In the above formula R1 may be, for example, n-methyl, n-ethyl, n-propyl, n-isopropyl, n-butyl, n-2-hydroxyethyl, n-methoxypropyl or n-2-hydroxypropyl. R2 may be selected to provide, for example, cocamides, esteramides, polyamides, lauramides, myristamides, capricamide, palmitamines, ceboamides, etc. The Z portion can be 1-deoxygluccytyl, 2-deoxytructityl, 1-deoxymaltityl, 1-deoxylactityl, 1-deoxygalactityl, 1 -deoxyanityl, 1-deoxymalototriotityl, etc. The most preferred polyhydroxy fatty acid amides have the general formula: O R1 OH R2- C- N- CH2 + CH- -CH2-OH Wherein R 1 is methyl or methoxypropyl; R2 is a straight chain alkyl to straight alkenyl group. These include N-lauryl N-methyl glucamide, N-lauryl-N-methoxypropyl glucamide, N-cocoyl-N-methiglucacamide, N-cocoyl-N-methoxypropylglucamide, N-palmityl-N-methoxypropylglucamide, N-ceboyl-N-methylglucamide , or N-baboyl-N-methoxypropylglucacamide.
As noted previously, some of the immobilization agents require an emulsifier for solubilization in the emollient. This is particularly the case for certain glucamides such as N-alkyl-N-methoxypropylglucaamides having HLB values of at least about 7. Suitable emulsifiers will typically include those having HLB values below about 7. In this regard, the esters of sorbitan previously described, such as sorbitan stearates having HLB values of about 4.9 or less have been found to be useful in the solubilization of those glutamide-in-petrolatum immobilization agents. Other suitable emulsifiers include steret-2 (polyethylene glycol ethers of aryl alcohols which adhere to the formula CH 3 (CH 2) 17 (OCH 2 CH 2) n OH, where n has an average value of 2), sorbitan tristearate, hisosorbide laurate and monostearate of giicelilo. The emulsifier may be included in an amount sufficient to solubilize the immobilizing agent in the emollient so that a substantially homogeneous mixture is obtained. For example, a mixture of approximately 1: 1 of N-cocoyl-N-methylglucanamide and petrolatum that normally does not fuse in a single phase mixture, will be fused in a single phase mixture by the addition of 20% of a mixture 1 : 1 of estearet-2 and sorbitan tristearate as the emulsifier. Other types of ingredients that are soluble in emollients that can be used as immobilizing agents, either alone, or in combination with the above-mentioned immobilization agents, include waxes such as caranauva wax, beeswax, candelilla wax, wax paraffin, microcrystalline wax, castrol wax, ceresin, esparto, ouricuri, prayer wax, polyethylene wax, and other known waxes. Preferably, the wax is a microcrystalline wax. An example of a particularly preferred microcrystalline wax is Multiwax W-835, Witco Corporation; One American Lane, Greenwich, CT06831-2559. Immobilization agents that are insoluble in emollients are particulate thickeners. In the present "particle thickener" it means the immobilization agent which is in the form of finely divided small particles. The particle thickener is able to improve the feeling of smoothness or lubricating effect of the skin care composition due to its particle structure. For example, fumed silica is as spherical as a "ball" that can act as a support, when shear force is applied, resulting in a lubricating effect. Bentonite or hectorite consists of a plurality of thin layers that can easily slip resulting in a feeling of softness. The average diameter or the corresponding average diameter may be less than about 100 microns, preferably less than about 20 microns, more preferably less than about 10 microns. When the particle has a shape different from that of a sphere, the corresponding diameter of the non-spherical particle can be represented by a diameter of a sphere having the same volume as the non-spherical particle. The corresponding diameter can be measured by Laser Particle Analyzer provided by Honeywell Ine; Honeywell Plaza, Minneapolis, MN; under the designation of Microtac X-100. The particle thickener is essentially insoluble in the emollient although it can be dispersed by forming the microscopic network therein and providing a solid structure for the emollient. The particle thickener can be selected from the group consisting of silica, treated silica, smoked silica, polymethacrylate polymers, polymethacrylate and styrene copolymers, calcium silicate, treated calcium silicate, treated ventonite, treated hectorite and mixtures thereof. A preferred particle thickener for use in the present fumed silica. Most preferred for use herein is fumed silica treated on the surface. Even more preferred is a fumed silica selected from the group consisting of smoked silica treated with polyalkyl siloxane, trialkylsylated fumed silica, distilled dialkylated fumed silica and mixtures thereof. Most preferred is a fumed silica selected from the group consisting of fumed silica treated with polydimethylsiloxane, trimethylsilane smoked silica, dimethyldisilanated fumed silica and mixtures thereof. Silica is also known as silicon dioxide or silicon anhydride, which may be represented by the chemical formula SiO2. A variety of different types of silicas that are useful herein, are fumed or arced silica, precipitated silica, silica gel, amorphous silica and solutions and silica colloids. The fumed silica, also known as arced silica, is produced by the hydrolysis of the vapor phase of silicon tetrachloride in a hydrogen-oxygen flame. Without wishing to join theory, it is considered that the combustion process creates silicon dioxide molecules that condense to form particles. The particles collide, unite and concretize together. The result of this process is a three-dimensional branched chain aggregate. Once the aggregate cools below the melting point of silica, which is about 1710 ° C; additional collisions result in mechanical entanglement of the chains to form agglomerate. The precipitated silicas and the silica gels are generally made in aqueous solution. Amorphous silicas are generally occurring microcrystalline forms of natural occurrence of the material. The solutions and colloids of silicas are dispersions of amorphous silica in an aqueous solution. The fumed silica and the treated smoked silica preferably have a mean particle size for the agglomerates, ie, an average particle size of agglomerate, from about 0.1 microns to about 100 microns, preferably from about 1 micron to about 50 microns, and more preferably from about 10 microns to about 30 microns. The agglomerates are composed of aggregates having an average particle size, ie, a mean aggregate particle size, from about 0.01 microns to about 15 microns, preferably from about 0.05 microns to about 10 microns, more preferably from about 0.1 microns to approximately 5 microns, more preferably from approximately 0.2 microns to approximately 0.3 microns. The fumed silica agglomerates commonly have hydroxyl groups. It is desirable to treat such fumed silicas to make the hydroxyl groups less reactive, especially when the emollient in the skin care composition is hydrophobic. A useful method of treatment is to coat the fumed silica with a non-polar organic compound to render the active hydroxyl groups less reactive. Preferred organic compounds for treatment include polyalkylsiloxanes, with the polydimethylsiloxanes being most preferred. The commercially available polydimethylsiloxane-treated smoked silicas useful herein are sold under the tradename CAB-O-Sil® TS-720 by Cabot Corporation, Tuscola, IL, or Aerosil R972 of Degussa AG, Germany, both having an area of surface area of around 120 m2 / g and a density per unit volume of 50 g / L. Another useful method of treatment is to chemically react the hydroxyl groups of the fumed silica with a silylating agent, for example, dimethyldichlorosilane or examethyldisilizone. In these chemically treated silicas, the free hydroxyl of the silicas are replaced with an oxygen-silicon bond of the slugging agent. A commercially available trimethylated silanated fumed silica is sold under the tradename CAB-O-Sil® TS-530, by Cabot Corporation, Tuscola, IL, which has a surface area of approximately 220 m2 / g and a density per unit volume of 50 g / L. A commercially available dimethyl distylated fumed silica is sold under the tradename CAB-O-SIL® TS-610, by Cabot Corporation, Tuscola, IL, which has a surface area of approximately 120 m2 / g and a density per unit volume of 50 g / L. The particle thickeners also useful herein are polymethacrylate polymers and copolymers of polymethacrylate and styrene. These materials are swelling polymers that are useful for absorbing liquid compositions in order to provide a thickening or gelling effect on the liquid. The polymethacrylate polymers are homopolymers of methacrylic acid esters, preferably methyl or ethyl esters, which are optionally entangled with any of the common entanglement agents. The polymethacrylate and styrene copolymers are copolymers of methacrylic acid esters, preferably methyl or ethyl esters, with styrene, which are optionally entangled with any of the common entanglement agents. The entanglement agent is most commonly a material that contains two or more unsaturated functional groups. The entanglement agent is reacted with the monomer signal of the polymer or copolymer and is incorporated into the polymer thereby forming bonds or covalent bonds between two or more individual polymer chains between two or more sections of the same polymer chain. Non-limiting examples of suitable entanglement agents include those selected from the group consisting of methylenebisacrylamides, diallyldialkylammonium halides, polyalkenyl polyesters of polyhydric alcohols, allyl acrylates, vinyloxy alkylacrylates and polyfunctional vinillidenes. Specific examples of entanglement agents useful herein include those selected from the group consisting of methylenevisacrylamide, ethylene glycol dimethacrylate, dimethacrylamide, sianomethyl acrylate, vinyl oxyethyl acrylate, vinyl oxy ethyl methacrylate, allyl pentaerythrol, diallyl ether of trimethylol propane, allyl sucrose, butadiene, isoprene, divinyl benzene, divinyl naphthalene, ethervinyl ether, methyl vinyl ether and allylic acrylate. Other interlayers include formaldehyde and glyoxal. A particularly useful crosslinked polymethacrylate polymer is sold under the tradename Polytrap®6603, from Dow Corning Corp; Midland, Mich. The particle thickeners also useful herein are treated bentonites and treated hectorites. Bentonite is a colloidal aluminum silicate clay. Hectorite is a clay that contains sodium, magnesium, lithium, silica, oxygen, hydrogen and fluorine. Especially useful in the present when the emollient in the skin care composition is hydrophobic are the bentonites and hectorites which have been treated with various organic compounds to make the clays less polar. In the present "treated" represents those materials that have been coated with the organic compound. Non-limiting examples of treated bentones include hectorite of stearate; 18-quaternary bentonite; 18-quaternary hectorite; castor oil and hectorite of stearalkonium and propylene carbonate; stearate and stearalkonium propyl and propylene carbonate myristate; hisodo decano and hectorita 18- quaternary and propylene carbonate; lanolin oil and hisopropyl palmitate and hectorite of stearalkonium and propylene carbonate and propyl; propylene glycol dicaprylate / dicaprate and stearalkonium hectorite and propylene carbonate; mineral oil and 18-quaternary hectorite and propylene carbonate; mineral oil and 18-quaternary hectorite and SD 40 alcohol; petroleum distillates and 18-quaternary and propylene carbonate hectorite; C12-15 alkyl benzoate and stearalkonium and propylene carbonate hectorite; cyclomethicone and 18-quaternary hectorite and SD 40 alcohol; cyclomethicone and 18-quaternary hectorite and propylene carbonate, and mixtures thereof. The particle thickeners also useful herein are calcium silicate and calcium silicate treated. Common forms of calcium silicate include CaSiO3, CaSiO4, and CaSiOd. These materials are also known as calcium salts of cilylic acid. Calcium silicates can be treated with a wide variety of non-polar organic compounds to make the materials more hydrophobic. Useful calcium silicates include the following commercially available materials: Hubersorb (Huber Corp, Harve de Grace, Md), and Micro-Cel C, Micro-Cel E, and Micro-Cel T-38 (Celite Corp; Denver; Coló) . Most of all the above particle thickeners can be easily dispersed in the emollient in the skin care composition by surface treatments. Instead of surface treatments or in combination with treatments, some emulsifiers are sometimes useful.
The amount of immobilizing agents that can be included in the skin care composition will depend on a variety of factors. 3. Active Ingredients of Skin Care. Various skin care active ingredients can be incorporated into the skin care composition. Those skin care assets preferably provide skin care benefits. These active ingredients include, but are not limited to, skin care agents, proton donor agents, enzyme inhibitors or mixtures thereof. The skin care compositions of the present invention allow to reduce the initial amount of active skin care active ingredients incorporated due to reduced migration in storage or transportation while providing an effective amount of active ingredients of care for the skin. skin in use. Skin care agents can be added to provide a therapeutic and / or skin protective benefit. It will be recognized that useful material numbers in the skin care compositions provided to the skin, those that have been considered safe and effective as skin care agents and mixtures thereof are logical materials for uses herein. Such materials include Category 1 assets as defined by the US Food and Drug Administration (FDA) Tentative Final Monograph on Skin Protectant Drug Products for Over-the-Counter Human Use (21 CFR § 347), which currently includes: alantoin, gel of aluminum hydroxide, calamine, cocoa butter, dimethicone, shark liver oil (in combination), glycerin, kaolin, petrolatum, lanolin, mineral oil, shark liver oil, white petrolatum, talc, topical starch, acetate zinc, zinc carbonate, zinc oxide and the like. Other potentially useful materials are Category 3 assets as defined by the US Food and Drug Administration's Final Tentative Monograph on Skin Protectant Drug Products for Over-the-Counter Human Use (21 CFR § 347), which currently includes: cell derivatives of live yeast, aldioxa, aluminum acetate, microporous cellulose, cholecalciferol, colloidal oat, systemic hydrochloride, dexpanthenol, balsam oil from Peru, protein hydrolysates, methionine, sodium bicarbonate, vitamin A, regular mixture of resins in its pH of exchange of cation and anion, corn starch, trolamine and the like. In addition, other potential materials are category 2 assets, as defined by the US Food and Drug Administration's Ultimate Monogrraph on Skin Protective Drug Products for Over-the-Counter Human Use (21 CFR § 347), which includes: bismuth subnitrate, boric acid, ferric chloride, copolymers of polyvinylpyrrolidone-vinyl acetate, sulfur, tannic acid and the like. The skin care agent can be selected from those materials and mixtures thereof. As mentioned before, the materials for use must be safe.
The skin care composition may include between about 0.001% and about 50% of the skin care agent. The concentration range of the skin care agents in the skin care composition varies from one material to another. The following table shows the preferred skin care agents for their use and their ranges of concentration in the skin care composition.
It should be understood that the skin care composition may include the materials listed above beyond its range. For example, when the skin care composition comprises 40% of petrolatum as an emollient and 50% of petrolatum as a skin care agent (another 10% can be an immobilizing agent), 90% of the care composition For the skin it can be petrolatum. Many FDA classified skin care agents are currently used in commercially available skin care products, such as ointment A and D®, Vaseline® petrolatum jelly, Desitin® diaper itch ointment and Daily Care® ointment, Gold Bond® medicated baby powder, Aquaphor® healing ointment, lotion for baby Baby Magic®, Johnson's Ultra Sensitive® baby cream. Those skin care ingredients and / or can be incorporated to create treated items. Proton donor assets can be added to help maintain a user's skin at its natural acid pH. For example, proton donor assets can be effective in neutralizing any pH components (i.e. >7) elevated body exudate. The chemically-suitable proton donor actives are effective in helping to maintain the pH of the skin in at least one mildly acidic condition. An illustrative and non-limiting list of proton donor assets includes monomeric organic acids; such acids of organic or inorganic acids; and polymeric organic acids and salts thereof. Certain combinations of an acid and a salt thereof, commonly known as pH regulators are also suitable, as long as an aqueous solution of the acid / salt combination has a pH of less than 7. A suitable acid or an acid salt should have at least one pKa between about 2.0 and about 6.5. The preferred range of pKa values for suitable proton donor actives is between about 2.5 and about 5.0. Preferred proton donor assets include pharmaceutically acceptable monomeric and polymeric organic acids. Exemplary monomeric organic acids suitable for use include: citric, malic, adipic, glutaric, lactic, sorbic, salic, tartaric, maleic, fumaric, malonic, glycolic and suxinic acids. Illustrative organic polymeric acids include: acidic vinyl polymers, for example, unsaturated carboxylic acid homopolymers and anhydride monomers such as acrylic acid, methacrylic acid, a-chloroacrylic acid, α-sialyacrylic acid, β-methylacrylic acid (crotonic acid) , α-phenylacrylic acid, β-acyloxypropionic acid, sorbic acid, α-chlorosorbic acid, angelic acid, cinnamic acid, p-chlorosinamic acid, β-sterilacrylic acid, itaconic acid, citraconic acid, mesaconic acid, glutaconic acid, aconitic acid , maleic acid, fumaric acid, tricarboxyethylene and maleic anhydride, unsaturated monomeric acid copolymers with suitable comonomers and partially neutralized salts of said polymers; acidic cellulose derivatives, such as at least partially carboxymethyl cellulose wherein the cellulose derivatives are at least partially protonated, cellulose phosphate and oxidized cellulose; and cation exchange resins wherein the cation exchange resin is at least partially protonated. Exemplary inorganic acid salts include alkali metal monohydrogen phosphates, combinations of alkali metal monohydrogen and dihydrogen phosphate salts, alkali metal monohydrogen pyrophosphate salts, and mixtures of alkali metal monohydrogen and dihydrogen pyrophosphate salts. Materials that can decompose in the environment adjacent to the wearer's skin within an active proton donor are also suitable for use. For example, esterase enzymes in faeces (eg faecal lipases) can hydrolyze certain esters to provide an active proton donor. Suitable proton donor assets of this type have the formula: H wherein Ri, R2 and R3 are independently hydrogen, an alkyl group, an alkenyl group, or a hydroxyalkyl group with 1 to 4 carbon atoms. An illustrative ester of this type is triacetin. In order for the active proton donor to be effective in helping to maintain the skin at an acidic pH the proton donor active must be provided at a level of at least 0.01% of the skin care composition; commonly of at least about 0.5%; preferably of at least about 3%. Said proton donor actives can be used as a component of the skin care compositions at a level between about 0.01% and about 40%, depending on the specific selected proton donor active. Preferably, the proton donor actives are used at a level of between about 0.5% and about 20% of the skin care composition. In particularly preferred embodiments, the proton donor actives are provided at a level of between about 3% and about 7%. This and other features of the proton donor actives are disclosed in United States of America Patent Application Serial Number 09/041509 entitled "Proton Donating Actives in Absorbent Articles" filed in the name of McOsker, et al. March 1998, which is incorporated herein by reference. Inhibitors against enzymes can be added to be available in skin / urine interfaces, skin / stools, skin / menstrual discharges to inhibit the enzymatic activity of the skin and to reduce or prevent the occurrence of inflammation. Inhibitors of enzymatic activity are well known and are commonly classified as competitive inhibitors (which compete with the substrate for binding at the active site of the enzyme) and non-competitive inhibitors (which bind to a different site from the active site to inactivate the enzyme) Many enzymes, such as metalproteases, are inhibited by substances that bind with a metal group on the enzyme. Chelating agents are effective inhibitors of other enzymes that require the presence of metal ions, such as calcium ions, cobalt, copper, magnesium, manganese, sodium, potassium or zinc for activation. Since enzymes are proteins, antibodies raised against specific enzymes are also effective enzyme inhibitors. The enzyme inhibitors useful in the absorbent articles described herein will typically have an IC5o value of no more than about 500 μM, more commonly no more than about 250 μM, and still more commonly no more than about 100 μM. μM. As used herein the term "IC5o" means the inhibitory concentration (eg, a micromolar concentration μM) d a substance (inhibitor) that reduces the dissociation rate of the substrate by an enzyme by 50%. The IC50 is calculated according to the equation IC5o = [l] / [(v / v¡) -1], where [I] is the inhibitor concentration tested, v is the velocity of the unfolding of the substrate in the absence of the inhibitor and v, is the rate of substrate cleavage in the presence of the inhibitor. The C or of an enzyme inhibitor can be measured by a purified enzyme method or by a fecal enzyme method which is described in the United States of America patent application 09/041266 entitled "Disposable Absorbent Article Having A Skin Care Composition. Containing An Enzyme Inhibitor "filed in the name of Roe, et al, on March 12, 1998. It will be understood that certain enzyme inhibitors (e.g. EDTA) will have higher IC5 values, although it will be useful in the absorbent articles described herein. For materials for which the molecular weight can not be determined, said materials will typically reduce the enzyme activity by at least 50% at a concentration in the skin care composition of no more than about 5% by weight.
Without limitation, any type of enzyme inhibitor can be employed in skin care compositions transferable to the wearer's skin, including any naturally occurring inhibitor of plant, microbial and / or animal origin (including humans) and the inhibitor. chemical manufactured synthetically. The enzyme inhibitors can be hydrophilic or hydrophobic in nature and can therefore be soluble in water or soluble in a hydrophobic vehicle. Enzyme inhibitors are preferably present in the skin care composition in a concentration of from about 0.001% to about 50% by weight, commonly from about 0.01% to about 25%, most commonly from about 0.1. % up to about 10%, and more commonly from about 0.1% up to about 5%. Due to the variety of enzyme inhibitors employed, the effective concentration of each inhibitor should be determined separately, as those skilled in the art know. The enzyme inhibitors can be used individually or as a mixture of enzyme inhibitors such as a "combination" of inhibitors in an individual absorbent article. In addition, different enzyme inhibitors can be employed in skin care compositions in different locations in a single absorbent article. Due to the wide diversity of enzymes present in body exudates, it is reasonably predictable that materials such as those described below that inhibit certain classes of enzymes (eg proteases) can also inhibit enzymes that unfold substrates different from those specified (e.g. proteins and peptides). Therefore, inhibitors that inhibit proteases can also inhibit lipases and other esterases, amylases and / or ureases and vice versa. The inhibitors of enzymes and / or coenzymes most frequently found in body exudates are preferred in skin care compositions. Thus, the enzyme inhibitors are preferably inhibitors of proteolytic enzymes such as trypsin, chymotrypsin, amynopeptidase and elastase; lipases; bile salts; amylases; and / or ureases. Suitable exemplary inhibitors of proteases for use which are considered to inhibit the type of protease indicated include, but are not limited to, trypsin inhibitor from soybeans and other trypsin inhibitors derived from plant sources such as bean protease inhibitor; corn protease inhibitor and the like; Bowman-Birk inhibitor (serine, trypsin-like protease inhibitor); pancreatic trypsin inhibitor such as inhibitor of bovine pancreatic basic trypsin and other inhibitors of pancreatic trypsin derived from animals; egg yolk trypsin inhibitor (trypsin-like protease inhibitor, cerin); or bumocoids containing ovoinhibitors such as those from chicken or turkey egg yolk (trypsin inhibitors and chymotrypsin); chymostatin (protease inhibitor similar to chymotrypsin, serine); aprotinin (cerin protease inhibitor); leupeptin and its analogues such as proponil-leupeptin, N-cc-t-BOC-deacetylleupeptin (inhibitor of cerin protease and system); bestatin and its analogs such as epido-statin and nitrostatin (metalloprotease inhibitor aminopeptirase); amastatin and its analogues such as epiamastatin (aminopeptoase inhibitor); antipain (trypsin inhibitor); antithrombin III (inhibitor of cerin proteases); hirudin (thrombin-like cerine protease inhibitor); sistatin (egg yolk system protease inhibitor); E-64 (trans-epoxysuxinyl- .leucyl amido- (4-guanidin) -butane) and its analogs (protease inhibitor system); oc2-macroglobulin (universal endoprotease inhibitor); oc1 -antitrypsin (trypsin inhibitor); pepstatin and its analogs such as acetylprapstatin, pepstatin A, Nle-Sta-Ala-Sta (inhibitor of aspartilase); abstatin (P aminopeptidase inhibitor); (2R) -2-mercaptomethyl-4-methyl-pentanoyl-b- (2-naphthyl) -Ala-Ala amide (matrix metalloprotease inhibitor); (2R) -2-mercaptomethyl-4-methylpentanonyl-Phe-Ala amide (matrix metalloprotease inhibitor); N-acetyl-Leu-Leu-methionine (calpain inhibitor); N-acetyl Leu-Leu norleucinal (calpain inhibitor); p-aminobenzyl-Gly-Pro-D-Leu-o-Ala hydroxamic acid (matrix metalloprotease inhibitor); 2 (R) - [N- (4-methoxyphenylsulfonyl) -N- (3-pyridylmethyl) amino] -3-methylbutane-hydroxamic acid (metalloprotease inhibitor); L-1-chloro-3- [4-tosylamido] -7-amino-2-heptanol-HCI (TLC), L-1-chloro-3- [4-tosylamido] -4-phenyl-2-butanone (TPCK ), tranexamic acid, glycylcrysic acid, 18-β-glycyrrhetinic acid, colloidal oat extracts, elivine, zinc iodoacetate salts, phenylmethylsulfonyl fluoride, phosphorus starch, 4- (2-aminoethyl) -benzenesulfonyl fluoride HCl, 3,4-dichloroisocyanate coumarin, quercetin and the like and mixtures thereof. It has also been found that chelating agents are useful as inhibitors of both proteases and ureases at a concentration of about 0.1% to about 2%. Illustrative chelating agents are physical acid, nitrile triacetic acid, EDTA, diethylenetriaminpentaacetic acid, hydroxyethylenediaminetriacetic acid and the corresponding acid salts described in US Pat. No. 5,091,193 issued to Enjolras on February 25, 1992, description of which is incorporated herein by reference. Among the preferred protease inhibitors are those compounds that exhibit inhibitory activity that is not necessarily restricted to a single class of proteases. Such compounds include, but are not limited to, examidin and its salts; pentamidine and its salts; benzamidine, p-aminobenzamidine and its derivatives; and guanidino benzoic acid and its derivatives such as those described in U.S. Patent No. 5,376,655 issued to Imaki et al, on December 27, 1994, the disclosure of which is incorporated herein by reference. Other preferred protease inhibitors include guanidino benzoic acid polymer derivatives described and made in U.S. Patent Application 09/041196 entitled "Enzyme Inhibitors" filed in the name of Mclver et al on March 12, 1998, the description of which is incorporated herein by reference. Protease inhibitors are preferred in practice are inhibitors of soybean trypsin, aprotinin, hexamidine (eg, hexamidine diisetionate), p-aminobenzamidine, lupeptin, pepstatin A, chymostatin and guanidino benzoic acid polymer derivatives (described and elaborated in U.S. Patent Application Serial Number 09/041196 entitled "Enzyme Inhibitors" incorporated by reference herein. Particularly preferred protease inhibitors are the soybean trypsin inhibitor, examidin, p-aminobenzanidine and the polymer derivatives of guanidino benzoic acid. Ureases are known to be inhibited in the presence of trace amounts of heavy metal ions, such as those of silver, copper and the like. Therefore, trace amounts (as low as 0.001% or less) of salts of those metals are useful as urease inhibitors. Other inhibitors illustrating urease activity include, but are not limited to, acetylhydroxanic acid and its derivatives, such as sinamoyl hydroxamic acid and other alkylidroxamic acids; phosphate amidate and its derivatives. Such compounds are competitive inhibitors of urease at a concentration of about 2 micromols (μM). Chelating agents have also been found to be useful as inhibitors of both protease and urease at a concentration of about 0.1% to about 2%. Illustrative chelating agents are pitic acid, nitrilotriacetic acid, ethylenediaminetetracetic acid (EDTA), diethylenetriaminpntaacetic acid, hydroxyethylenediaminetriacetic acid and the corresponding acid salts described in US Pat. No. 5,091,193 incorporated by reference. Other urease inhibitor compounds are described in U.S. Patent 3,935,862 issued to Kraskin on February 3, 1976, the disclosure of which is incorporated herein by reference and includes amino acid compounds, such as hydroxyalkylamino, sulfhydrylamino acids, aminosulfonic acids, aminophosphonic acid compounds and ceramino acids such as methoxyethylimido diacetic acid, ethylene-bis (-oxydropylaminodiacetic acid, ethylene-bis-oxy-ethylimidodiacetic acid, aminomethylphosphonic acid, (N, N-diacetic acid), and the like and aminopolycarboxylic acid compounds including diethylenetriaminpentacetic acid (DTPA) acids and salts, N-hydroxyethylethylenediaminetetracetic acid (HEDTA), and the like, Other suitable urease inhibitors are disclosed in U.S. Patent No. 5,409,903 issued to Polak et al. April 25, 1995, the description of which is incorporated herein by reference. This patent discloses dibasic magnesium phosphate, dialdehyde polysaccharides and seolite, used alone or in combination with each other or with compounds of calcium, calcium acetate, calcium chloride, calcium gluconate and calcium lactate as well as the compounds of magnesium, chloride of magnesium and magnesium citrate for inhibition of ureases.
Suitable lipase inhibitors include, but are not limited to, water-soluble salts of metals, such as cadmium, cobalt, copper, iron, molifdene, silver, lanthanum, tin and zinc. Exemplary lipase inhibitor compounds are described in U.S. Patent 4,556,560, incorporated herein by reference, and include zinc chloride, zinc acetate, zinc nitrate trihydruri, zinc nitrate exahydrides, sulfate zinc, zinc sulfate tinhydride, zinc sulfate hexahydride, iron (II) chloride, iron (II) chloride tetrahydride, iron chloride (III), iron chloride monohydride (III), chloride hexahydride iron (II), iron (II) lactate, iron lactate (III), iron (II) malate, iron nitride (III), iron (III) nitrate exhydride, iron nitride (III) 9H2O, iron (II) sulphate and its hydrides, iron (III) sulfate, and its hydrides, copper sulphate pentahydride, tin chloride, cobalt chloride and lanthanum chloride, zinc salts of saturated and unsaturated monocarboxylic acids having about 6 to 12 carbon atoms, snowflake block copolymers of propylene oxide and ethylene oxide (sold as Pluronic® and Tetronic® by BASF Corp.), glycerol triesters of fatty acids having from about 2 to about 20 carbon atoms such as triacetin and the like. Other useful lipase inhibitors are described in U.S. Patent 5,091, 193, incorporated herein by reference and include esters of fatty alcohols such as saturated or unsaturated, linear alkyl or branched acetate, lactate or propionate containing 10 to 20 carbon atoms; linear or branched zinc salts, saturated or unsaturated, of fatty acids of 2 to 22 carbon atoms, such as those formed with propionic acid, butylbutyl acid, caproic acid, undecylenic acid, and the like; zinc salts of amino acid acylated acids, such as propionyl systeine, propionyl hydroxyproline or caproylisysteine, and the like. Lipase inhibitors, such as the above, have been found to be useful at a concentration of about 0.01% to about 10%. Other useful lipase inhibitors, described in European Patent Application Serial Number 97120699.0 entitled "Skin Rash Prevention Composition" filed in the name of Palumbo et al; on November 26, 1997, the description of which is incorporated by reference herein, includes specific ester compounds that act as a substitute substrate for fecal lipases and are therefore competitive lipase inhibitors. These esters have the formulas of: Where R, and R 2 are each independently an asyl group with 2 to 22 carbon atoms, or an alkyl, alkenyl, arylalkyl, hydroxyalkyl group, with 1 to 24 carbon atoms or hydrogen, whereby at least one of R 1 and R 2 is an acyl group, R 3 R Rs R 7 R 9 R 9 are independently one of the groups alkyl, alkenyl, arylalkyl, hydroxyalkyl, alkoxy, from 1 to 24 carbon atoms, hydroxy group or hydrogen; Rl0 and Rn are independently an alkyl, alkenyl, arylalkyl, hydroxyalkyl, alkoxy group of 2 to 24 carbon atoms, hydroxy group or hydrogen; A and B are independently an alkylene, alkenylene, alkoxylene, hydroxyalkylene, straight or branched group of 1 to 6 C átomos-C6 carbon atoms; the values of x are independently from 0 to 15; the values of y are independently from 0 to 1, with the provision that when x = 2 and y = 0, at least one R 2 is an alkyl, alkenyl, arylalkyl, hydroxyalkyl group with 1 to 24 carbon atoms or hydrogen. Additional examples of lipase inhibitors are those described in U.S. Patent 5,643,874, incorporated herein by reference, which includes: (2S, 3S, 5S) -5 - [(S) -2-lactone 1,3-formalin-4-methyl-vareliroxy] -2-hexyl-3-hydroxy-hexadecanoic acid 1,3, also known as tetrahydrolipstatin; 1,3 (2S, 3S, 5S, 7Z, 10Z) -5 - [(S) -2-formamido-4-methyl-vareliroxy] -2-hexyl-3-hydroxy-7,10-hexadecanoic acid lactone also known as lipstatin; 1- (trans-4-isobutylcyclohexyl) -2- (phenylsulfonyloxy) ethanone, also known as FL-386; 4-methylpiperidin-1-carboxylic acid 4-phenoxyphenylester, also known as WAY-121898; N- [3-chloro-4- (trifluoromethyl) phenyl-] N '- [3- (trifluoromethyl) -phenyl] urea, also known as BAY-N-3176; ester N-formyl-L-valin- (S) -1 - [[(2S, 3S) -3-exyl-4-oxo-2-oxetanyl-methylmethyl, also known as valilactone; lactone (2S, 3S, 5S, 7Z, 10Z) -5 - [(S) -2-acetamido-3-carbamoylpropionyloxy] -2-exyl-3-hydroxy-7,10-exadecadienoic, also known as sterastine; (3S, 4S) -4 - [(1S, 5R, 7S, 8R, 9R, E) -8-hydroxy-1,3,5,7,9-pentamethyl-6-oxo-3-undecenyl] -3- methyl-2-oxetanone, also known as ebelactone A; (3S, 4S) -3-ethyl-4 - [(1S, 5R, 7S, 8R, 9R, E) -8-hydroxy-1, 3,5,7,9-pentam ethyl-6-oxo-3 -undecenyl] -2-oxetanone, also known as ebelactone B; and 1,6-di (O-carbamoyl) cycloexanon oxim) hexane, also known as RHC80267. Illustrative inhibitors of bile salts that are coenzymes for lipolytic enzymes are also useful as inhibitors of lipase enzyme in absorbent articles include, but are not limited to, the cationic compounds described in European Patent Applications Serial No. 97120700.6 entitled "Skin Care Composition "presented on behalf of Palumbo, et al, on November 26, 1997, the description of which is incorporated under reference. Such compounds have the formulas: (p) Or an amphoteric compound preferably a source of acidity, the amphoteric compound having at its isoelectric point the formula: R 10 (m) For the preparation of a composition for treatment, prevention or reduction of lipolytic dermatitis of the external skin, wherein R., R2, R3 and R are independently an alkyl, alkenyl, aryl, arylalkyl, amidoalkyl, polyalkoxy, hydroxyalkyl, acyl group , or two or more groups of R?, R2, R3 and R together form one or more ring structures; R5, Re, and A are independently an alkylene, alkenylene, polyalkoxylene, hydroxyalkylene, arylalkylene or amidoalkylene group of 1 to 22 carbon atoms; R7 and Rs are independently an alkyl, alkenyl, alkoxy or a hydroxy group of 1 to 4 carbon atoms or hydrogen; C? -C22 are independently an alkyl group. Alkenyl, aryl, arylalkyl, amidoalkyl, polyalkoxy, hydroxyalkyl or acyl of 1 to 22 carbon atoms or two or more of the groups R., R9 and R10 together form one or more ring structures; BH is a proton donor group; x is from 2 to 4; and M is a counterion. Another illustrative suitable bile salt inhibitor is cholestyramine, described in the publication of C. Michael White et al; entitled "Cholestyramine Ointment to Treta Buttocks Rash and Excoration in an Infant", The Annals of Pharmacotherapy 30: 954-956, Sept. 1996. P-guanidinobenzoic acid derivatives, especially guanidinobenzoic acid esters, have been described as esterase inhibitors. Such inhibitors are useful in skin care compositions of absorbent articles, and are described in U.S. Patent 5,376,655 issued to Imaki et al, on December 27, 1994, the description of which is incorporated to the present by reference. Suitable amylase inhibitors and / or glucosidase amylase inhibitors include those described in U.S. Patent 5,643,874, incorporated herein by reference and include 0-4,6-dldeoxi-4 [[[1 S- (1a, 4a, 5ß, 6a)] - 4,5,6-trihydroxy-3- (hydroxymethyl) -2-cyclo-oxen-1-yl-amino] -D-glucopyranosyl- (1 4) OaD-glucopyranosyl- (1 4) -D-glucose also known as archabose; 2 (S), 3 (R), 4 (S), 5 (S) -tyetrahydroxy-N- [2-hydroxy-1 - (hydroxymethyl) -etl] -5- (hydroxyethyl) l) -1 (S) cyclohexamine, also known as voglibose; 1,5-dideoxy-1, 5 - [(2-hydroxyethyl) imino] -D-glucitol also known as miglitol; 1,5-dideoxy-1,5- [2- (4-ethoxycarbonienoxy) -ethylimino] -D-glucitol, also known as emiglitate; 2,6-dideoxy-2,6-imino-7- (β-D-glucopyranosyl) -D-glycero-L-guloeptitol, also known as MDL-25637; 1,5-Dideoxy-1,5- (6-deoxy-1-O-methyl-a-D-glucopyrene-6-bound) -D-glucitol. Also known as camiglibose, 1,5,9,11,14-pentahydroxy-3-methyl-8,13-dioxo-5,6,8,13-tetrahydrobenzo [a] -naphthalene-2-carboxylic acid, also known as pradimicin Q; also known as adiposine; and 1,2-dideoxy-2- [2 (S), 3 (S), 4 (R) -tridoxy-5- (hydroxymethyl) -5-cyclohexen-1 (S) -ylamino] -L-glucopyranose , also known as salvostatin; other suitable amylase inhibitors include tendamisatato.testratinas and those derived from plants, especially from wheat, rice, corn, barley and other cereal grains, seeds and algae. These and other features of enzyme inhibitors are described in the United States patent application serial number 09/041232 entitled "Portease Inhibitors in Absorbent Articles" filed in the name of Rourke, et al on March 12, 1998, and U.S. Patent Application Serial Number 09/041266 entitled "Disposable Absorbent Article Having a Skin Care Composition Containing and Enzyme Inhibitor" filed in the name of Roe, et al. March 12, 1998, which are incorporated herein by reference. The active skincare ingredients are soluble or insoluble. The insoluble skin care active ingredients can be dispersed in skin care composition with dispersing agents to form a homogeneous mixture of skin care composition. It is preferable that the active skin care ingredients are pre-dispersed in predispersing solvents with dispersing agents. Pre-dispersion solvents can be based on petroleum, fatty acid ester, alkylethoxylate, fatty acid ethoxylate ester, fatty alcohol, polysiloxane or mixtures thereof. In addition, dispersion solvents can be soluble skin care active ingredients. Illustrative preferable dispersing agents are diethanolaminpolyoxytylethylene ether phosphate, polyhydroxystearic acid, polyglyceryl-6-polyricinoleate, neopentyl glycoliisoisostearate, propylene glycolicaprate or mixtures thereof. Other possible dispersing agents are isoelcosan and polyisobutylene and quaternium 18, phenyltrimethicone and quaternium-18 hectorite and triethyl citrate, isohexadecane and quaternium-18 hectorite and propylene carbonate, octyldodecanol and quaternium-18 hectorite and propylcarbonate, mineral oil and quaternium-18 hectorite and propylene carbonate, isopropylmyristate and stearalkonium hectorite and propylene carbonate, cyclomethicone and SDA 40, lanolin oil and isopropyl parmitate and hectorite of stearalkonium and propylene carbonate and propylparaben, 1-eicosanol, and mixtures thereof. 4. Another Optional Component. The skin care compositions may comprise other optional components. Those optional components include water, hydrophilic surfactants, viscosity modifiers, perfumes, film formers, deodorants, opacifiers, solvents and the like. The stabilizers can be added to improve the shelf life of the skin care composition such as cellulose derivatives, proteins and lecithin. The hydrophilic surfactants may be added to promote rapid transfer of fluid (eg, urine, menstrual discharges, etc.) from the top cover to the absorbent inner layers of the article. The detail of said hydrophilic surfactant is disclosed, for example, in U.S. Patent 5,643,588, "Diaper Having a Lotion Topsheet", issued to Roe, Bakes & Warner on July 1, 1997, and incorporated to the presnete by reference.
C. Body Contact Surface Treatment with Skin Care Composition. In the preparation of products treated with skin care compositions according to the present invention, the skin care composition is applied on at least a portion of the surface facing the body of said absorbent articles. Any of a variety of methods and application that uniformly distribute viscous materials can be used. Suitable methods include printing, spraying, coating, brush application, extrusion or combinations of these application techniques. The minimum level of skin care composition to be applied on the surface that makes contact with the body of the article is an effective amount to provide effects to the skin for the user. The level of applied skin care compositions will depend on several factors, including the relative amount of surface area of the untreated body contact surface with the skin care composition, the expected effects on the skin of the composition of the skin. care for the skin and the like. The amount of skin care composition may also vary on the body contact surface. For example, some portions of the body contact surface may have greater or lesser amounts of the skin care composition than the other portions of the body contact surface, including portions of the surface that have no care treatment composition. for the skin on it. The skin care composition can be applied over the entire surface of the body contact surface or selectively on the portions of the body contact surface. For example, if the skin care composition is applied to the top cover of the absorbent article, the application form of the skin care composition on the top cover of the absorbent article is preferable so that the composition of care for the skin is distributed mainly on the part that confronts the body of the upper cover. However, the skin care composition is relatively hydrophobic, it is preferable that the skin care composition is not distributed in the fluid path (such as the openings in the top cover) and does not block the fluid path for the skin. ensure the ability of the upper deck to transmit fluid to the underlying absorbent core. Examples of the pattern of the coating include strips, dots, circles or the like. The skin care composition can be applied to the body contact surface at any point during assembly. For example, the skin care composition can be applied to the body contact surface of the finished absorbent article before it has been packaged. The skin care composition can also be applied to the surface that contacts the body before it is combined with other raw materials to form the finished absorbent article. The skin care composition is typically applied from a fusion thereof to the article. Since the skin care composition melts significantly above ambient temperatures, it is usually applied as a heated coating to the contact surface of the body of the article. The temperature is determined by considering mainly the melting point of the skin care composition and other factors such as the reduction of temperature in the article manufacturing process. The skin care composition is often heated to a temperature in the range of 50 ° C to 100 ° C, more frequently from 60 ° C to 90 ° C, before being applied to the article. Once the skin care composition has been applied to the article, it is allowed to cool and solidify to form a solidified coating or film on the surface of the body contact surface. Preferably, the application process is designed to assist in the cooling / fixation of the skin care composition. Examples of application of the skin care composition to the body contact surface are described, for example, in United States Patent 5,643,588, "Diaper Having a Lotioned Topsheet", issued to Roe, Bakes &; Wagner on July 1, 1997, which is incorporated herein by reference.
SPECIFIC ILLUSTRATIONS OF THE PREPARATION OF THE TREATED ARTICLE ACCORDING TO THE PRESENT INVENTION. The following examples further describe and demonstrate the preferred embodiments within the scope of the present invention. The examples are given only for purposes of illustration and are not considered as limitations of the present invention since many variants thereof are possible without departing from the spirit and scope.
Example 1. A. Preparation of Skin Care Compositions. A water-free skin care composition (skin care composition A) is made by mixing the following melted components: petrolatum manufactured by Witco Corp under the name Super White Protopet®, and behenyl alcohol made by Henkel Corp. Under the name Lanette 22. Super White Protopet® is petrolatum. The ratio of heavy aliphatic hydrocarbons having alkyl chain length from 27 to 36 to light hydrocarbons having alkyl chain length from 17 to 26 is 2.3: 1.0. The ratio of heavy aliphatic hydrocarbons having alkyl chain length of 30 to 36 to light aliphatic hydrocarbons having alkyl chain length of 20 to 26 is 1.7: 1.0. The ratio of heavy aliphatic hydrocarbons having alkyl chain length of 33 to 36 to light aliphatic hydrocarbons having alkyl chain length of 23 to 26 is 1.3: 1.0. Lanette 22 is a linear primary alcohol mixed with 18 to 24 C, 8-C2 carbon atoms. Lanette 22 contains about 70% C22 fatty alcohol, about 20% C20 alcohol, about 9% C18 alcohol, and about 1% C2 fatty alcohol. The percentages by weight of these components are shown in Table I below: TABLE I.
B.Preparation of Article Treated with Skin Care Composition by Hot Melt Printing. The skin care composition A is placed inside a heated tank operating at a temperature of 90 ° C. The composition is subsequently applied with a contact applicator (using a Meltex EP45 hot-melt adhesive applicator head operating at a temperature of 90 ° C) on the entire DRI-WEAVE top cover of Whisper Slim Wing Regular Long manufactured by Procter &; Gamble Far East, Ine at an adhesion level = 4 g / m2.
Example 2. A.-Preparation of Skin Care Compositions. A water-free skin care composition (skin care composition B) is made by mixing the following melted components: petrolatum manufactured by Witco Corp, under the name Protopet® 1S, and behenyl alcohol made by Henkel Corp, under the name Lanette 22. Protopet® 1S is petrolatum. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 27 to 36, to light aliphatic hydrocarbons having an alkyl chain length of 17 to 26 is 2.3: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 30 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 20 to 26 is 1.7: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 33 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 23 to 26 is 1.3: 1.0. Lanette 22 contains approximately 70% C22 fatty alcohol, approximately 20% C20 alcohol, approximately 9% C? 8 alcohol, and approximately 1% C2 fatty alcohol. The percentages by weight of these components are shown in Table II below: Table II.
B.-Preparation of Article with Skin Care Composition by Hot Melt Spray. The skin care composition B is placed inside a heated tank operating at a temperature of 90 ° C. The composition is subsequently sprayed (using a Dynatec E84B1758 sprinkler head, operating at a temperature of 90 ° C and a spray pressure of 16 kPa) on the top cover DRI-WEAVE of Whisper Slim Wing Regular Long manufactured by Procter & Gamble Far East, Ine; in a pair of strips that are 40 mm wide (lateral direction) and 200 mm long (longitudinal direction) at an addition level of = 2 g / m2.
Example 3. A. Preparation of skin care. A water-free skin care composition (skin care composition C), is made by mixing the following cast components: petrolatum manufactured by Witco Corp, under the name Super White Protopet®, behenyl alcohol manufactured by Henkel Corp, under the name Lanette 22, and Steareth-2 made by ICI America under the name Brij 762. Super White Protopet® is petrolatum. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 27 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 17 to 26 is 2.3: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 30 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 20 to 26 is 1.7: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 33 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 23 to 26 is 1.3: 1.0. Lanette 22 contains approximately 70% C22 fatty alcohol, approximately 20% C20 alcohol, approximately 9% Cia alcohol, and approximately 1% C 4 fatty alcohol. Brij 762 is a linear C e8 alcohol ethoxylate which has a degree average of ethoxylation of 2. The percentages by weight of these components are shown in table III below: Table III.
B. Preparation of Article with Skin Care Composition by Hot Melt Spray. The skin care composition C is placed in a heated tank operating at a temperature of 90 ° C. The composition is subsequently sprayed (using a Dynatec E84B1758 spray head, which operates at a temperature of 80 ° C and a spray pressure of 16 kPa) over the entire DRI-WEAVE top cover of Whisper Slim Regular Long manufactured by Procter & Gamble Far East, Ine, at an addition level of = 4 g / m2.
Example 4. A. Preparation of Skin Care Composition. A water-free skin care composition (skin care composition D) is manufactured by mixing the following melted components together: petrolatum made by Witco Corp, under the name Protopet® 1S, microcrystalline wax made by Witco, Corp, under the name Multiwax® W-835, and stearyl alcohol made by Procter & Gamble Company under the name CO1895. Protopet® 1S is petrolatum. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 27 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 17 to 26 is 2.3: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 30 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 20 to 26 is 1.7: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 33 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 23 to 26 is 1.3: 1.0. Multiwax® W-835 is the microcrystalline wax that has a consistency of 60 to 80 at 25 ° C measured under ASTM d-1321. CO1895 is a C? 8 primary alcohol. The percentages by weight of the components are shown in table IV below: Table IV.
B. Preparation of Article Treated with Skin Care Composition by Hot Melt Spray. The skin care composition is placed in a heated tank that operates at a temperature of 90 ° C. The composition is subsequently sprayed (using a Dynatec spray head E84B1758, operating at a temperature of 90 ° C and a spray pressure of 16 kPa) on a DRI-WEAVE top cover of Whisper Slim Wing Regular Long manufactured by Procter & Gamble Far East, Ine; in a pair of strips that are 40 mm wide (lateral direction) and 200 mm long (longitudinal direction) at an addition level of = 4bg / m2.
Example 5. A. Preparation of Skin Care Composition. A water-free skin care composition (skin care composition E) is made by mixing the following melted components together: the petrolatum made by Witco Corp, under the name Protopet® 1S, polyethylene wax made by Witco Corp, under the name Performalene 400®, and stearyl alcohol made by Procter & Gamble Company under the name CO1895. Protopet® 1S is petrolatum. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 27 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 17 to 26 is 2.3: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 30 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 20 to 26 is 1.7: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 33 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 23 to 26 is 1.3: 1.0. Performalene 400® is a polyethylene wax having an average molecular weight of 400. CO1895 is a primary alcohol C? 8. The percentages by weight of these components are shown in Table V below: Table V.
B. Preparation of Article Treated with Skin Care Composition by Hot Melt Spray. The skin care composition E is placed in a heated tank operating at a temperature of 90 ° C. The composition is subsequently applied with a contact applicator (which uses a Meltex EP45 hot-melt adhesive applicator head operating at a temperature of 90 ° C) and over the entire DRI-WEAVE top cover of Whisper Slim Wing Regular Long manufactured by Procter & Gamble Far East, Ine, at an adhesion level of = 4 g / m2.
Example 6. A. Preparation of Skin Care composition.
A water-free skin care composition (skin care composition F) is made by mixing fused silica made by Degussa AG under the name of Aerosil R972 with the following cast components: petrolatum made by Witco Corp, under the name Super White Protopet®, and behenyl alcohol manufactured by Henkel Corp, under the name Lanette 22. These are mixed using a high-speed sheet mixer (Tokusyu Kika TK Robo Mies, which operates at 5000 rpm). Super White Protopet® is petrolatum. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length from 27 to 36 to light hydrocarbons having an alkyl chain length of 17 to 26 is 2.3: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length from 30 to 36 to light hydrocarbons having an alkyl chain length of 20 to 26 is 1.7: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length from 33 to 36 to light hydrocarbons having an alkyl chain length of 23 to 26 is 1.3: 1.0. Lanette 22 contains about 70% C22 fatty alcohol, about 20% C20 alcohol, about 9% C18 alcohol and about 1% C24 alcohol. Aerosil R972 is smoked silica treated on its surface by dimethylsilicone and has an average diameter of less than 1μm. The percentages by weight of these components are shown in Table VI below: Table VI.
B. Preparation of Article Treaty with Skin Care Composition by Hot Melt Printing. The skin care composition F is placed in a heated tank operating at a temperature of 90 ° C. The composition is subsequently applied with a contact applicator (using a Meltex EP45 hot melt adhesive applicator head operating at a temperature of 90 ° C) on the entire DRI-WEAVE top cover of Whisper Slim Wing Regular Long manufactured by Procter &; Gamble Far East, Ine, at an addition level of = 4 g / m2.
Example 7 A. Preparation of Skin Care Composition. A water-free skin care composition (skin care composition G) is manufactured by mixing bentonite clay manufactured by Rheox Ine, under the name Bentone 38 with the following cast components: petrolatum manufactured by Witco, Corp, under the Protopet® name and behenyl alcohol made by Henkel Corp, under the name Lanette 22. These are mixed through a high speed sheet mixer (Tokusyu Kika TK Robo Mies, which operates at 5000 rpm). Protopet® 1S is petrolatum. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length from 27 to 36 to light hydrocarbons having an alkyl chain length of 17 to 26 is 2.3: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length from 30 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 20 to 26 is 1.7: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 33 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 23 to 26 is 1.3: 1.0. Lanette 22 contains approximately 70% C22 fatty alcohol, approximately 20% C20 alcohol, approximately 9% C18 alcohol, and approximately 15 C24 fatty alcohol. Bentone 38 is bentonite clay treated on its surface with an ammonium salt and has an average diameter of less than 5μm. The percentages by weight of these components are shown in table VII below: Table VII.
B. Preparation of Article Treated with Skin Care Composition by Hot Melt Printing. The skin care composition G is placed in a heated tank operating at a temperature of 90 ° C. The composition is subsequently applied with a contact applicator (using a Meltex EP45 hot melt adhesive applicator head operating at a temperature of 90 ° C) on the entire DRI-WEAVE top cover of Whisper Slim Wing Regular Long manufactured by Procter &; Gamble Far East, Ine, at an addition level of -4 g / m2.
Example 8. A. Preparation of Skin Care Compositions. A water-free skin care composition (skin care composition H) is made by mixing zinc oxide manufactured by Zinc Corporation of America under the name USP-1 with mineral oil manufactured by Shell Co. Under the name Kaydol as a pre-dispersion solvent for zinc oxide, polyglyceryl-6-polyricino oleate made by Nikko Chemicals Co. Ltd, under the name Hexaglyn PR15 as a dispersing agent for zinc oxide and the following melted components: petrolatum manufactured by Witco Corp, under the name Super White Protopet® and behenyl alcohol made by Henkel Corp, under the name Lanette 22. These are mixed with a high-speed sheet mixer (Tokusyu kika TK Robo Mies, operating at 5000 rpm) at 90 ° C. Super White Protopet® is petrolatum. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 27 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 17 to 26 is 2.3: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 30 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 20 to 26 is 1.7: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 33 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 23 to 26 is 1.3: 1.0. Lanette 22 contains about 70% C22 fatty alcohol, about 20% C20 alcohol, about 9% C18 alcohol, and about 1% C24 fatty alcohol. USP-1 is zinc oxide having an average particle diameter of about 0.1-1.0 μm. The percentages by weight of the components are shown in Table VIII below: Table VIII.
B. Preparation of Article Treated with Skin Care Composition by Hot Melt Printing. The skin care composition H is placed in a heated tank operating at a temperature of 90 ° C. The composition is subsequently applied with a contact applicator (using a Meltex EP45 hot melt adhesive applicator head operating at a temperature of 90 ° C) on the entire DRI-WEAVE top cover of Whisper Slim Wing Regular Long manufactured by Procter &; Gamble Far East, Ine, at an addition level of = 4 g / m2.
Example 9. A. Preparation of Skin Care Composition. A water-free skin care composition (skin care composition I) is made by mixing zinc oxide manufactured by Zinc Corporation of America under the name USP-1 with mineral oil manufactured by Shell Co. Under the name Kaydol as a pre-dispersion solvent for zinc oxide, ether-ethanediamine polyoxyethylene oleyl phosphate made by Croda Ine, under the name Crodafos N3N as a dispersing agent for zinc oxide and the following melted components: petrolatum manufactured by Witco Corp, under the name Propet ® 1S, and behenyl alcohol manufactured by Henkel Corp, under the name Lanette 22. These are mixed with a high speed sheet mixer (Tokusyu kika TK Robo Mies, operating at 5000 rpm) at 90 ° C. Propet® 1S is petrolatum. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 27 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 17 to 26 is 2.3: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 30 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 20 to 26 is 1.7: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 33 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 23 to 26 is 1.3: 1.0. Lanette 22 contains about 70% C22 fatty alcohol, about 20% C20 alcohol, about 9% C18 alcohol, and about 1% C24 fatty alcohol. USP-1 is zinc oxide having an average particle diameter of about 0.1-1.0 μm. The percentages by weight of the components are shown in table IX below: Table IX.
B. Preparation of Article Treated with Skin Care Composition by Hot Melt Printing. The skin care composition I is placed in a heated tank operating at a temperature of 90 ° C. The composition is subsequently applied with a contact applicator (using a Meltex EP45 hot melt adhesive applicator head operating at a temperature of 90 ° C) on the entire DRI-WEAVE top cover of Whisper Slim Wing Regular Long manufactured by Procter &; Gamble Far East, Ine, at an addition level of = 3 g / m2.
Example 10. A. Preparation of Skin Care Composition. A water-free skin care composition (skin care composition J) is made by mixing zinc oxide manufactured by Zinc Corporation of America under the name USP-1 with mineral oil manufactured by Shell Co. Under the name Kaydol as a pre-dispersion solvent for zinc oxide, polyhydroxypoliestearic acid manufactured by ICI Ine, under the name Arlacel P100 as a dispersing agent for zinc oxide and the following melted components: petrolatum made by Witco Corp, under the name Super White Protopet®, behenyl alcohol manufactured by Henkel Corp, under the name of Lanette 22 and Steareth-2 manufactured by ICI America under the name Brij 762. These are mixed with a high speed sheet mixer (Tokusyu Kika TK Robo Mies, which operates at 5000 rpm) at 90 ° C. Super White Protopect® is petrolatum. The ratio of aliphatic hydrocarbons heavies having an alkyl chain length of 27 to 36 to the light aliphatic hydrocarbons having an alkyl chain length of 17 to 26 is 2.3: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 30 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 20 to 26 is 1.7: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 33 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 23 to 26 is 1.3: 1.0. Lanette 22 contains approximately 70% C22 fatty alcohol, approximately 20% C20 alcohol, approximately 9% C18 alcohol, and approximately 1% C24 fatty alcohol. Brij 762 is a C18 linear alcohol ethoxylate having an average degree of ethoxylation of 2. USP-1 is zinc oxide having an average particle diameter of about 1.1-1.0 μm. The percentages by weight of the components are shown in table X below: Table X.
B. Preparation of Article Treated with Skin Care Composition by Hot Melt Spray. The skin care composition J is placed in a heated tank operating at a temperature of 90 ° C. The composition is subsequently applied (using a Dynatec E84B1758 spray head operating at a temperature of 80 ° C and a spray pressure of 16 kPa) on the entire top cover DRI-WEAVE of Whisper Slim Wing Regular Long manufactured by Procter & Gamble Far East, Ine, at an addition level of = 5 g / m2.
Example 11. A. Preparation of Skin Care Composition.
A water-free skin care composition (skin care composition K) is made by mixing zinc oxide manufactured by Zinc Corporation of America under the name of USP-1 with mineral oil manufactured by Shell Co. Under the name Kaydol as a pre-dispersion solvent for zinc oxide, polyethylene glycol dicaprate made by Abitec Performance Products under the name Captex 100 as a dispersing agent for zinc oxide and the following melted components: petrolatum manufactured by Witco Corp, under the name Protopet® 1S, behenyl alcohol manufactured by Henkel Corp, under the name Lanette 22, and microcrystalline wax manufactured by Witco Corp, under the name Multiwax® W-835. These are mixed with a high speed blade mixer (Tokusyu Kika TK Robo Mies, operating at 5000 rpm) at 90 ° C. Super White Protopect® is petrolatum. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 27 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 17 to 26 is 2.3: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 30 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 20 to 26 is 1.7: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 33 to 36 to the light aliphatic hydrocarbons having an alkyl chain length of 23 to 26 is 3: 1.0. . Lanette 22 contains about 70% C22 fatty alcohol, about 20% C20 alcohol, about 9% C18 alcohol, and about 1% C24 fatty alcohol. Multiwax® W-835 is microcrystalline wax that has a consistency of 60 to 80 at 25 ° C measured under ASTM D-1321. USP-1 is a zinc oxide having an average particle diameter of about 0.1-1.0 μm. The percentages by weight of the components are shown in Table XI below: Table XI.
B. Preparation of Article with Skin Care Composition by Hot Melt Spray. The skin care composition K is placed in a heated tank operating at a temperature of 90 ° C. The composition is subsequently applied (using a Dynatec E84B1758 spray head operating at a temperature of 80 ° C and a spray pressure of 16 kPa) on the entire cover of the upper cover DRI-WEAVE of Whisper Slim Wing Regular Long manufactured by Procter & Gamble Far East, Ine, at an addition level of = 4 g / m2. Example 12. A. Preparation of Skin Care Composition. A water-free skin care composition (skin care composition L) is made by mixing zinc oxide manufactured by Zinc Corporation of America under the name of USP-1 with mineral oil manufactured by Shell Co. Under the name Kaydol as a pre-dispersion solvent for zinc oxide, polyethylene glycol dicaprate made by Abitec Performance Products under the name Captex 100 as a dispersing agent for zinc oxide and the following cast components: petrolatum manufactured by Witco Corp, under the name Super White Protopet®, behenyl alcohol manufactured by Henkel Corp, under the name Lanette 22, stearyl alcohol manufactured by Procter & Gamble Company under the name CO1895 and wax microcristallna manufactured by Witco, Corp under the name Multiwax® W-835. These are mixed with a high speed blade mixer (Tokusyu Kika TK Robo Mies, operating at 5000 rpm) at 90 ° C. Super White Protopect® is petrolatum. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 27 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 17 to 26 is 2.3: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 30 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 20 to 26 is 1.7: 1.0. The ratio of heavy aliphatic hydrocarbons having an alkyl chain length of 33 to 36 to light aliphatic hydrocarbons having an alkyl chain length of 23 to 26 is 1.3: 1.0. CO1895 is a linear C18 primary alcohol. Multiwax® W-835 is microcrystalline wax that has a consistency of 60 to 80 at 25 ° C measured under ASTM D-1321. USP-1 is zinc oxide having an average particle diameter of about 0.1-1.0 μm. The percentages by weight of the components are shown in Table XII below: Table XII.
B. Preparation of Article with Skin Care Composition by Hot Melt Spray. The skin care composition L is placed in a heated tank operating at a temperature of 90 ° C. The composition is subsequently applied with a contact applicator (using a Meltex EP45 hot melt adhesive head operating at a temperature of 90 ° C) on the entire cover of the upper DRI-WEAVE top cover of Whisper Slim Wing Regular Long manufactured by Procter & Gamble Far East, Ine, at an addition level of = 6 g / m2. It should also be understood that all limits and ranges specified herein include all narrower ranges, limits and quantities that are within the specified limits and ranges that are such narrow ranges and limits that can be claimed even though those range limits do not be listed separately. While the particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims (36)

  1. CLAIMS. 1. an absorbent article comprising body contact surfaces and an absorbent core, wherein (1) at least a portion of the body contact surface comprises an effective amount of a skin care composition which is solid or semi-solid at 40 ° C. ° C and which is transferable from the body contact surface to the user's skin by contact, normal user movement and body heat at an effective level to provide a benefit to the skin for the user's skin, and (2) the Skin care composition has a viscosity of more than about 105 Poise under shear stress of less than about 3X104 dynes / cm2, and viscosity of less than about 102 Poise under shear stress of more than about 106 dynes / cm2 at 40 ° C. 2. The absorbent article in accordance with the claim 1, wherein the skin care composition has a viscosity of more than about 106 Poise under shear stress of less than about 3X104 dynes / cm2 at 40 ° C. 3. The absorbent article in accordance with the claim 2, wherein the skin care composition has a viscosity of less than about 101 Poise under a shear stress of more than about 106 dynes / cm2 at 40 ° C. 4. The absorbent article in accordance with the claim 3, wherein the skin care composition has a consistency of no more than about 300 to 40 ° C. 5. The absorbent article in accordance with the claim 4, characterized in that the skin care composition has a consistency of no more than about 150 to 40 ° C. 6. The absorbent article in accordance with the claim 5, wherein the skin care composition has a consistency of no more than about 100 to 40 ° C. 7. The absorbent article in accordance with the claim 6, wherein the skin care composition comprises from about 40 to about 90% of an emollient and from about 10 to about 60% of an agent that immobilizes the emollient. 8. The absorbent article in accordance with the claim 7, wherein the emollient is selected from the group consisting of petroleum based, fatty acid ester type, alkylethoxylate type, fatty acid ester ethoxylate, fatty alcohol type, polysiloxane type and mixtures thereof. 9. The absorbent article in accordance with the claim 8, where the emollient is petrolatum. 10. The absorbent article in accordance with the claim 9, wherein the petrolatum comprises heavy aliphatic hydrocarbons and ligative aliphatic hydrocarbons, wherein the petrolatum contains the heavy aliphatic hydrocarbons more than the light aliphatic hydrocarbons. 11. The absorbent article in accordance with the claim 10, wherein the heavy aliphatic hydrocarbons have an alkyl chain length of 33-36 and the light aliphatic hydrocarbons have an alkyl chain length of 23-26, wherein the ratio of heavy aliphatic hydrocarbons to light aliphatic hydrocarbons is between 2.0: 1.0 and 1.0: 1.0. 12. The absorbent article in accordance with the claim 11, where the ratio of heavy aliphatic hydrocarbons to light aliphatic hydrocarbons is between 1.5: 1.0 and 1.0: 1.0. The absorbent article according to claim 10, wherein the heavy aliphatic hydrocarbons have an alkyl chain length of 30-36 and the light aliphatic hydrocarbons have an alkyl chain length of 20-26, wherein the of heavy aliphatic hydrocarbons to light aliphatic hydrocarbons is between 2.5: 1.0 and 1.0: 1.0. The absorbent article according to claim 13, wherein the ratio of heavy aliphatic hydrocarbons to light aliphatic hydrocarbons is between 2.0: 1.0 and 1.0: 1.0. 15. The absorbent article according to claim 10, wherein the heavy aliphatic hydrocarbons have an alkyl chain length of 27-36 and the light aliphatic hydrocarbons have an alkyl chain length of 17-26, wherein the ratio of heavy aliphatic hydrocarbons to light aliphatic hydrocarbons is between 3.5 : 1.0 and 1.5: 1.0. 16. The absorbent article according to claim 15, wherein the ratio of heavy aliphatic hydrocarbons to light aliphatic hydrocarbons is between 3.0: 1.0 and 2.0: 1.0. 17. The absorbent article according to claim 7, wherein the immobilizing agent is soluble in the emollient. 18. The absorbent article in accordance with the claim 17, wherein the immobilizing agent is selected from the group consisting of C14-C24 fatty alcohols, C12-C24 fatty acids, and C12-C24 fatty alcohol ethoxylates, waxes and mixtures thereof. 19. The absorbent article in accordance with the claim 18, wherein the immobilization agent is C14-C24 fatty alcohol. 20. The absorbent article in accordance with the claim 19, wherein the immobilization agent is C18-C24 fatty alcohol. 21. The absorbent article in accordance with the claim 20, wherein the immobilization agent is behenyl alcohol. 22. The absorbent article in accordance with the claim 21, wherein the behenyl alcohol comprises from about 50% to about 99.99% C22 fatty alcohol, from 0% to about 27% C20 fatty alcohol, from 0% to about 20% C18 fatty alcohol, and from about 0.01% to about 3% C24 fatty alcohol. 23. The absorbent article according to claim 22, wherein the behenyl alcohol comprises from about 63% to about 84.9% C22 fatty alcohol, from 10% to about 20% C20 fatty alcohol, from 5% to about 20% alcohol C18 fatty acid, and from about 0.1% to about 2% C24 fatty alcohol. 24. The absorbent article according to claim 7, wherein the immobilizing agent is insoluble in the emollient. 25. The absorbent article in accordance with the claim 24, wherein the immobilizing agent is a particle thickener selected from the group consisting of silica, treated silica, fumed silica, polymethacrylate polymers, polymethacrylate and styrene copolymers, calcium silicate, calcium silicate treated, treated bentonite , treated hectorite and mixtures thereof. 26. The absorbent article in accordance with the claim 25, wherein the immobilizing agent is selected from fumed silica, treated bentonite, treated hectorite and mixtures thereof. 27. The absorbent article in accordance with the claim 26, wherein the particle thickener has an average diameter of less than about 100 microns. 28. The absorbent article in accordance with the claim 27, wherein the particle thickener has an average diameter of less than about 20 microns. 29. The absorbent article according to claim 28, wherein the particle thickener has an average diameter of less than about 10 microns. 30. An absorbent article comprising a body contact surface and an absorbent core wherein (1) at least a portion of the body contact surface comprising an effective amount of a skin care composition which is solid or semi-solid at 40 ° C and which is transferable from the body contact surface towards the wearer's skin by contact, normal user movement and body heat at an effective level to provide a benefit to the skin for the wearer's skin. (2) the skin care composition comprising an active skin care ingredient. (3) the skin care composition has a viscosity of more than about 105 Poise under shear stress of less than about 3X104 dynes / cm2, and viscosity of less than about 1 O2 Poise under shear stress of more than approximately 106 dynes / cm2, at 40 ° C. 31. The absorbent article according to claim 30, wherein the active skin care ingredient is selected from the group consisting of skin care agents, proton donor agents, enzyme inhibitors and mixtures of the same. 32. . The absorbent article according to claim 31, wherein the active skin care ingredient is the skin care agent. 33. The absorbent article in accordance with the claim 32, wherein the skin care composition comprises from about 0.001% to about 50% of the skin care agent. 34. The absorbent article in accordance with the claim 33, wherein the skin care agent is selected from the group consisting of allantoin, aluminum hydroxide gel, calamine, cocoa butter, dimethicone, cod liver oil, glycerin, kaolin, petrolatum, lanolin, mineral oil, shark liver oil, white petrolatum, talc, topical starch, zinc acetate, zinc carbonate, zinc oxide, yeast cell derivatives, aldioxa, aluminum acetate, microporous cellulose, colecalciferol, colloidal oat, hydrochloride of system, dexpanthenol, balsam oil from Peru, protein hydrolysates, methionine rasamica, sodium bicarbonate, vitamin A, regular mixture of cation and anion exchange resins, corn starch, trolamine, bismuth subnitrate, acid in its pH boric, ferric chloride, copolymers of polyvinylpyrrolidone-vinyl acetate, sulfur, tannic acid and mixtures thereof. 35. The absorbent article according to claim 30, wherein the effective skin care ingredient is insoluble, wherein the active ingredient of care for insoluble skin is dispersed in the skin care composition with a skin care agent. dispersion. 36. The absorbent article according to claim 35, wherein the dispersing agent is selected from the group consisting of diethanol amine, polyoxyethylenelethyl phosphate, polyhydroxystearic acid, polycyclic ryl-6 polyricinoleoate, neopentyl glycol diisostearate, propylene glycol dicaprate, isoelcosanoipolyisobutene and quaternium 18, phenyl trimethicone and quaternium 18hectorite and triethyl citrate, isohexadecane and quaternium 18 hectorite and propylene carbonate, octyldodecanol and heternite 18 hectorite and propylene carbonate, mineral oil and quaternium 18 hectorite and propylene carbonate, isopropyl myristate and steariconium hectorite and propylene carbonate, cyclomethicone and quaternium 18 and SDA 40, lanolin oil, isopropyl ipalmitate and stearalkonium hectorite and propylene carbonate ipropylparaben, 1-eicosanol and mixtures thereof.
MXPA01011795A 1999-05-19 2000-05-19 Absorbent article with skin care composition. MXPA01011795A (en)

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