ABSORBENT ARTICLE HAVING REMOVAL/DISPOSAL AID
FIELD OF THE INVENTION
The present invention relates to disoosable absorbent articles for the absorption and containment of body fluids such as menstrual fluid urine and other body exudates and more particularly, to a combined removal and disposal aid for comfortably disengaging the disposable absorbent article from either the wearer's body or the wearer's undergarment and for nygiemcally containing the absorbent article to provide for convenient disposal of the absorbent article after use
BACKGROUND OF THE INVENTION
Disposable absorbent articles for the absorption and containment of urine, menses and other body exudates are generally known in the art Such disposable articles have found particular utility in the fields of infant, child, feminine and adult incontinence hygiene In the area of feminine care, such disposable absorbent articles have been commercialized in two basic types, the tampon and the sanitary napkin For the purposes described herein sanitary napkins include thin absorbent devices such as panty liners and interlabial devices, which may have an absorbency of just a few grams, to the larger axi ana overnight pads designed for absorbing a much greater quantity of body fluids Present sanitary napkins are unitary, pre- shaped and pre-folded and may be individually packaged for discreteness and hygienic purposes Their construction is generally comprised of a fluid permeable body side cover, a liquid-impermeable, garment-facing baffle and an absorbent positioned between the cover and the baffle The sanitary napkin also may include an adhesive disposed on either the garment-facing surface of the baffle to secure the sanitary napkin in the crotch region of the wearer's undergarment or the body-facing surface of the fluid-permeable body side cover to secure the sanitary napkin to the crotch region of the body of the wearer
After the sanitary napkin is soiled, it is removed and discarded Removing a sanitary napkin secured to either the undergarment of the wearer or the body of the wearer usually involves stripping the sanitary napkin from the crotch area of the
undergarment or the crotch region of the wearer, respectively However, if the sanitary napkin having adhesive on either the body-facing surface o1" the undergarment-facing surface has become adhered to the wearer the sanitary napkin, removal of the sanitary napkin may pull pubic hair and tissue from the woman thereby causing, in most cases, an extreme amount of discomfort
A sanitary napkin is disclosed ^ United States Patent Application Serial Number 08/167,597 ("the '597 application"), filed on December 14, 1993, tne entire disclosure of which is incorporated herein by reference and made a part hereof The sanitary napkin of the '597 application utilizes a body adhesive to secure the sanitary napkin to the wearer s body To remove this sanitary napkin, the wearer usually grasps an exposed edge of the sanitary napkin and pulls downwardly Depending upon the location of the adhesive, grasping an edge may be difficult A further drawback is that the adhesive of the sanitary napkin may have body fluids, such as menses or other fluids, coating a surface thereof Desirably, the wearer wants to avoid contacting the body excretions to prevent soiling her hands and possibly her clothing Touching the adhesive may also contaminate that portion of the adhesive, lessening its adhesive strength for retaining the sanitary napkin against the wearer's body, if the sanitary napkin is to be reapplied
Disposal of a soiled product also presents its own unique problems Sanitary napkins generally have a fluid-impervious backsheet or baffle that prevents disposal by merely flushing the soiled product down a toilet Generally naDkin users are faced with the task of disposing of a used napkin in open waste paper baskets, often resorting to wrapping the soiled napkin in tissue before discarding
Therefore, there is a need for a method of comfortably and hygienical ly removing such an absorbent article from a wearer's body or a wearer's undergarment without soiling the person or her clothing There is also a need for a sanitary napkin that can be sealed into a compact size for disposal
SUMMARY OF THE INVENTION Briefly, the present invention relates to an absorbent article adapted to be secured to either a wearer's body or a wearer's undergarment The absorbent article is also capable of being folded and self-sealed for disposal The absorbent article has a fluid-permeable cover with a body facing surface and a liqui -impermeable
WO 01/60300 PCTYTJSOl/04571
baffle with a garment-facing surface Positioned between the body facing surface and the garment-facing surface is an absorbent material An adhesive is secured to either the body facing surface to hold the absorbent article in intimate contact with the wearer during use or to the garment-facing surface to hold the absorbent article against the wearer's undergarment The absorbent article also includes a pocket device having a fixed portion secured to the baffle and an open portion adapted to assist in disengaging or removing the absorbent article from the wearer's body or the wearer's undergarment, when removal is desired The pocket device is utilized by the wearer by grasping and/or inserting at least a portion of one or more fingers into the open portion and pulling the absorbent article away from the wearer's body or the wearer's undergarment
The present invention also provides a method of disposing of the sanitary napkin comprising the steps of folding the sanitary napkin along its transverse centerline or axis so that the body facing s de of the napkin is folded upon itself and rolling or folding the open portion of the pocket device over the transverse ends of the sanitary napkin to retain the sanitary napkin in a folded condition This effectively encloses the soiled portion of the napkin and keeps the absorbed body fluid from leaking Moreover, the soiled sanitary napkin can now be easily handled and hygiemcally discarded without needing to wrap the soiled napkin in tissue paper
It is a general oDject of the invention to provide a removal aid for comfortably detacning an adhesively secured absorbent article from either a wearer's body or a wearer's undergarment More specifically, it is an object of the invention to provide a removal aid on the absorbent article that permits the wearer to remove it with one hand
It is another object of the invention to provide a sanitary napkin which is adhesively secured to either the wearer's body or the wearer's undergarment, and which incorporates a detaching device positioned on the baffle for protecting the user from contacting body fluids when removing the sanitary napkin It is another object of the invention to provide a sanitary napkin having its own disposal means
These and other objects of the invention will be more readily apparent when considered in reference to the following description when taken in conjunction with
the accompanying drawings The invention resides in the novel combination arrangement of the parts and methods as substantially described herein and more particularly defined by the claims
BRIEF DESCRIPTION OF THE DRAWING FIGURES
FIG 1 is a top view of a first embodiment of an absorbent article which may be secured to the wearer s body during use
FIG 2 is a bottom view of the absorbent article of FIG 1 FIG 3 is a cross-sectional view of FIG 1 taken along line 3-3 FIG 4 is a coss sectional view of a first variation of the first embodiment of FIG 1
FIG 5 is a cross-sectional view illustrating how the pocket means can be utilized to hygiemcally dispose of a soiled product
FIG 6 is a cross-sectional view illustrating a second variation of the first embodiment of FIG 1
FIG 7 is a top view of a second embodiment of an absorbent article which may be secured to the wearer s undergarment
FIG 8 is a bottom view of the absorbent article of FIG 7 FIG 9 is a cross-sectional view of FIG 7 taken along line 9-9 FIG 10 is a cross-sectional view of a first variation to the second embodiment of FIG 9
FIG 11 is a cross-sectional view illustrating how the pocket means can be utilized to hygiemcally dispose of a soiled product
FIG 12 is a cross-sectional view illustrating a second variation of the first embodiment of FIG 7
FIG 13 is a side elevational view showing the absorbent article folded in half
FIG 14 is a side elevational view of the folded-in-half absorbent article wherein the pocket device is being turned inside out to contain the absorbent article
FIG 15 is a side elevational view showing the absorbent article contained in the pocket device
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention relates generally to a disposable absorbent article which is secured to either a wearer's body, via a pressure sensitive body adhesive on the body-facing surface of the absorbent article, or to a wearer's undergarment. via adhesive on the garment-facing surface of the adhesive article For convenience of description only, the invention will be described as a catamemal device, i e a sanitary napkin, but is not limited thereto It is to be understood that the invention may be adapted for use in other absorbent articles such as diapers, incontinent devices, adhesive bandages and the like which incorporate some means for adhesively adhering the absorbent article to either one of at least a portion of a wearer's body or at least a portion of the wearer's undergarment
For ease of understanding, when referring to the Figures, the same numeral designates the same or a substantially identical part in the different views and embodiments Referring to FIGS 1- 6 and 7-12, first and second embodiments, respectively, of a sanitary napkin 10 are shown Broadly, the sanitary napkin 10 includes a fluid-permeable, body-facing surface 12, a liquid-impermeable, garment- facing surface 14. an absorbent core 16 disposed between the body-facing surface 12 and the garment-facing surface 14, and either a body adhesive 18a secured to the body facing surface 12 for adhering the sanitary napkin 10 to a wearer's body during use or an adhesive 18b secured to the garment-facing surface 14 for adhering the sanitary napkin 10 to a wearer's undergarment during use Examples of sanitary napkins, which are basically constructed, are disclosed in U S Patent Application Serial No 08/475,324 filed June 30, 1995, and entitled "ABSORBENT ARTICLE HAVING A THIN, EFFICIENT ABSORBENT CORE," and U S Patent Application Serial No 08/716,875, filed October 1, 1996, and entitled "ABSORBENT ARTICLE HAVING A CELLULOSIC TRANSFER LAYER," the entire disclosure of each patent application being incorporated herein by reference and made a part hereof
Referring to FIGS 2 and 8, a pocket device 20 is disposed toward the garment- facing surface 14 of the sanitary napkin 10 to provide an easy way for comfortably disengaging the sanitary napkin 10 from the wearer's body and for hygiemcally disposing of the used product The sanitary napkin 10 can also include a peel strip, not shown, overlying the adhesive 18a or 18b to prevent the adhesive 18a or
18b from becoming contaminated and/or prematurely adhering to an unintended surface Suitable materials for use as a peel strip are well known and commercially available from a number of sources
As illustrated, the sanitary napkin 10 has a racetrack shape, but is not limited thereto It can also be hourglass-shaped, oval or any other configuration that will allow the sanitary napkin 10 to come into intimate contact with the wearer As used herein, the term "sanitary napkin" refers to an article which is worn by females adjacent to the pudendal region and which is intended to absorb and contain various exudates which are discharged from the body such as blood, menses, and urine, and which is intended to be discarded when soiled, not laundered and reused Interlabial devices which reside partially within and partially external of the female wearer's vestibule are also within the scope of this invention
Referring to FIGS 1-3 and 7-9, the body facing surface 12 is generally integral to and associated with one surface of a cover 22 and the garment-facing surface 14 is generally integral to and associated with one surface of a baffle 24 The cover 22 and baffle 24 can have a length and a width dimension extending in a contiguous relationship beyond an edge 26 of the absorbent core 16 The cover 22 and the baffle 24 can be sealed together to define a perimeter 28 of the sanitary napkin 10 The portion from the absorbent edge 26 to the perimeter 28 is defined herein as the peripheral seal 30 The absorbent core 16 is thereby enclosed between the cover 22 and the baffle 24 The cover 22 and the baffle 24 may be sealed together using any suitable means that will not leave a hard, uncomfortable residue that may be annoying to the wearer As used herein, the term "sealed" encompasses configurations whereby the cover 22 is directly joined to baffle 24 and configurations whereby the cover 22 is indirectly joined to the baffle 24 by affixing the cover 22 to an intermediate member, which are in turn affixed to the baffle 24 Methods for attaching the cover 22 and baffle 24 are well known to those skilled in the art and include the use of hot melt adhesives, pressure-sensitive adhesives, double-sided tape, some bonding and heat sealing. The cover 22 is designed to contact the body of the wearer and therefore should be easily penetrated by body fluids The cover 22 should also be non- irπtating to the wearer's skin and preferably will not absorb an appreciable amount
of fluid insulting its surface The cover 22 can be constructed of a woven or non- woven, natural or synthetic material Suitable materials include bonded carded webs of polyester, polypropylene, polyethylene, nylon, or other heat-bondable fibers Other polyolefins, such as copolymers of polypropylene and polyethylene, linear low-density polyethylene, finely-perforated film webs and net material, also work well Particularly preferred are composite materials of a polymer and a non-woven fabric material Still another cover material is a spunbond web of polypropylene The web can contain about 1% to about 6% titanium dioxide pigment to give it a clean, white appearance A uniform spunbond material is desirable because it has sufficient strength in the longitudinal direction, even after being perforated, to resist being torn or pulled apart during use The most preferred polypropylene webs have a weight of between about 18 and 40 grams per square meter An optimum weight is between about 30 and about 40 grams per square meter
To aid in the penetration of the liquid through the web, the cover 22 can also be treated with a surfactant to improve its hydrophilic characteristics The surfactant can include topical additions or internally applied materials like polysiloxanes.
The baffle 24 acts as a barrier between the absorbed body fluids contained in the absorbent core 16 and the person wearing the sanitary napkin 10. Accordingly, the baffle 24 is non-absorbent and is impervious to liquids The baffle 24 should be soft and compliant since a portion of the baffle 24 may reside adjacent the thigh region of the wearer As used herein, the term "compliant" refers to materials which will readily conform to the general external shape and contours of the human anatomy In a preferred embodiment, the baffle 24 may permit the passage of air or vapor out of the sanitary napkin 10, while blocking the passage of liquids from the absorbent core 16. A good baffle material is a micro-embossed, polymeric film, such as polyethylene or polypropylene having a thickness in the range of from about 0 012 mm to about 1.0 mm Bi component films can also be used as well as woven and non- woven fabrics which have been treated to render them liquid-impermeable The absorbent core 16 is in liquid communication with the body-facing surface 12 and is positioned between the body-facing surface 12 and the garment-facing surface 14 The term "liquid communication" means that body fluid insulting the
body-facing surface 12 will, substantially, be absorbed by the absorbent core 16 Referring again to FIGS 2 and 8, the cover 22 and the baffle 24 in combination enclose the absorbent core 16, substantially defining the absorbent core's perimeter or edge 26 The materials used in the absorbent core 16 are designed to absorb body exudates, including menstrual fluids, blood and urine Suitable materials induce wood pulp fluff, rayon, cotton and meltblown polymer, such as polyester, polypropylene or coform Coform is an air-formed combination of meltblown polymers, such as polypropylene, and absorbent staple fibers, such as cellulose A preferred material is wood fluff, for it is low in cost, relatively easy to form and has good absorbency The absorbent core 16 may De a composite comprised of a hydrophilic material that can be formed from various natural or synthetic fibers, wood pulp fibers, regenerated cellulose or cotton fibers, an air laid tissue or a blend of pulp and other fibers The absorbent core 16 can be made from other well known materials used in absorbent articles, including multiple layers of cellulose wadding, rayon fibers, cellulose sponge, hydrophilic synthetic sponge, such as polyurethane, and the like The capacity of the absorbent core 16 may be varied depending upon the intended usage of the final product
The sanitary napkin 10 may also include other layers, such as a wicking layer, one or more tissue layers and may contain superabsorbent in combination with one or more other absorbent materials described above, none of which are shown in the
Figures Such layers and materials are commercially available from several sources and are well known to those skilled in construction of disposable absorbent articles, such as sanitary napkins, diapers and incontinent devices
The adhesive 18a is positioned on the body-facing surface 12 to contact the wearer and support the sanitary napkin 10 during use As shown in FIG 1, the adhesive 18a is adhered to the body-facing surface 12 of the cover 22
The adhesive 18b is positioned on the garment-facing surface 14 to contact the wearer's undergarment which supports the sanitary napkin 10 during use As snown in FIG 8, the adhesive 18b is adhered to the garment-facing surface 14 of the baffle 24
The adhesive 18a or the adhesive 18b can overlie from about 5 percent to about 95 percent of the body-facing surface 12 or the garment-facing surface 14,
respectively Preferably, the adhesive 18a or the adhesive 18b overlies from about 5 percent to about 75 percent of the body-facing surface 12 or the garment-facing surface 14, respectively More preferaDly, tne adhesive 18a or tne adhesive 18b overlies from about 5 percent to about 35 percent of the garment-facing surface 14, respectively Most preferably, the adhesive 18a or the adhesive 18b overlies from about 5 percent to about 20 percent of the body facing surface 12 or the garment- facing surface 14, respectively SuitaDle adhesive materials are disclosed in the commonly assigned United States Patent Application Serial Number 08/331,072, filed on Octooer 28, 1994, the entire disclosure of which is incorporated herein by reference and made a part hereof
In an alternative configuration, not shown, the baffle 24 may overwrap a portion of the cover 22 along the absorDent edge 26 so that a portion of the body facing surface 12 would be comprised of the fluid-permeable cover 22 and a portion would be comprised of the liquid-impermeable baffle 24 In this configuration, the adhesive 18 may reside on the cover 22, the baffle 24 or both
Referring to FIGS 2-5 and 8-11, the pocket device 20 is positioned adjacent to the garment-facing surface 14 of the baffle 24 The pocket device 20 may be formed by securing an appropriately sized separate piece of material to a portion of the baffle 24 Alternatively, the pocket device 20 may be formed by folding back onto the baffle 24 and sealing thereto a portion of excess material used to form the baffle 24 Desirably, the material extends from a transverse end 40 or 42 of the sanitary napkin 10 and is folded back onto the baffle 24 A portion of the material can then be affixed to the baffle 24 to form the pocket device 20 Any material not used to form the pocket device 20 and which may extend beyond the perimeter 28 could then be removed when the sanitary napkin 10 is shaped via die cutting during its production
Referring to FIGS 1-2 and 7-8, the sanitary napkin 10 can be divided into substantially equal portions along transverse line Y-Y into a first section 32 and a second section 34 Each section 32 and 34 are of substantially size and have substantially equal surface areas disposed toward the garment- facing surface 14 The pocket device 20 has a fixed portion 36 secured to the baffle 24 at or inward of the perimeter 28 of the sanitary napkin 10 As seen in FIGS 2 and 8, the fixed
portion 36 generally follows tne perimeter 28 of the sanitary napxin 10 in that section 32 or 34 in which it is affixed The pocket device 20 is sized and configured so that it covers greater than about 25 percent of the surface area, preferably, the pocket device 20 covers greater than about 50 percent of the surface 5 area, and more preferably, the pocket device 20 covers greater than about 80 percent of the surface area.
Referring to FIGS 3, 4, 9. and 10, the pocket device 20 also has an open portion 38 that is adapted for assisting the wearer in removing the sanitary napkin 10 from her body or from her undergarment The open portion 38 of the pocket device
10 20 is sufficient for the wearer to at least partially insert into the open portion 38 one or more of her fingers Desirably, the open portion 38 extends from the edge 26 of the absorbent core 16 to the opposite edge 26 of the absorbent core 16, i.e extending the width of the absorbent core 16 The open portion 38 of the pocket device 20 provides a means by which the sanitary napkin 10 can be comfortably and
15 hygiemcally removed from the wearer's body or from the wearer's undergarment The wearer can remove or disengage the sanitary napkin 10 from her body or from her undergarment by grasping the open portion 38 and/or partially inserting into the open portion 38 a portion of her hand and pulling it directionally away from her body or her undergarment. The pocket device 20 also permits the sanitary napkin 10 0 to be hygiemcally handled while toileting or during disposal thereof
The pocket device 20 may be made from any material that can be affixed to the baffle 24 using any suitable means that will not leave a hard, uncomfortable residue that may be annoying to the wearer. The material should have a modulus greater than the peel strength of the adhesive 18a or 18b to prevent the material from tearing 5 during removal. Suitable materials include bonded carded webs of polyester, polypropylene, polyethylene, nylon, or other heat-bondable fibers, polymeric film, such as polyethylene or polypropylene. Desirably, the material used is the same as or similar to the material used in forming the baffle 24 If the baffle 24 is constructed from a breathable film material it is also desirable to construct the 0 pocket device 20 from a compatible breathable material to prevent partially negating the advantage of using a breathable film.
Referring to FIGS 4 and 10, the pocket device 20 may further incorporate one or more expanding means 44 for permitting the open portion 38 to expand and/or stretch in at least one direction to accommodate the insertion of several fingers into the pocket Examples of expanding means includes folds, pleats and using an elastomeπc material to form at least a portion of the pocket device 20 The expanding means 44 increases the volume of the open portion 38 by greater than about 5 percent, preferably greater than about 50 percent and more preferably greater than about 80 percent Tne elastomeπc material should be elastomeπc in at least one direction and may have elasticity in both the transverse and longitudinal directions, relative to the sanitary napkin 10 An elastomeπc material may be constructed from a polyethylene film laminate having elastic threads incorporated between the laminate material Material expandability is of further utility in the method of disposal described herein by allowing the open portion 38 of the pocket device 20 to be easily folded over the transverse ends 40 and 42 Referring to FIGS 2-5 and 8-11, in the method of the invention, the sanitary napkin 10 is folded about the transverse axis Y-Y so the body-facing surface 12 of the cover 22 is folded upon itself, allowing the transverse ends 40 and 42 to be substantially aligned The open portion 38 of the pocket device 20 is then rolled, folded or pulled over the ends 40 and 42 to hold the ends 40 and 42 together FIGS 5 and 11 shows this enveloping Thus, the soiled side of the napkin will be enclosed in the folded pad and retained as shown This will eliminate the need for wrapping the used napkin 10
Referring to FIGS 13-15, a method of using the pocket device 20 of the present invention to contain a used sanitary napkin 10 will now be described After removal from the wearer's body, the sanitary napkin 10 is folded about the transverse axis Y-Y so the body-facing surface 12 of the cover 22 is folded upon itself Thus, the longitudinal ends 40 and 42 are substantially aligned Open edge portion 27 of the pocket material 21 and the baffle 24 defines the first cavity 38 By folding the sheet of pocket material 21 over the longitudinal ends 40 and 42, the first cavity 38 can be inverted to create a second inverted cavity 29 The open edge portion 27 of the pocket device 20 is thus rolled, folded or pulled over the longitudinal ends 40 and 42 to hold the ends 40 and 42 together FIGS 5 and 9 and
FIGS 11 and 15 show the ends 40 and 42 contained in the second cavity 29 Tnus the soiled side 12 of the napkin will be enclosed in the second inverted cav τy 29 of the pocket device 20 and retained as shown This will eliminate the need for wrapping the used sanitary napkin 10 in tissue to discard FIGS 13-15 further illustrate the inverting of first cavity 38 of pocket device 20 and the creation of the second inverted cavity 29 FIG 13 shows a side elevation of the sanitary napkin 10 folded along axis Y-Y immediately prior to tne inverting of the first cavity 38 and the creation of the second cavuy 29 FI3 15 shows the sanitary napkin 10 after first cavity 38 has been fully inverted and second cavity 29 has been formed over the folded together longitudinal ends 40 and 42 FIG 14 is an intermediate embodiment and shows the transformation from FIG 13 to FIG 14 As shown in FIG 14, as the pocket device 20 is being inverted, ope-ι edge portion 27 is lifted away from baffle 24, and second cavity 29 begins to be formed while first cavity 38 is inverted Arrows 50 in FIG 14 show the direction of movement of pocket device 20 during the inverting of the first cavity 38 and ihe creation of the second cavity 29
The foregoing detailed description has been for the purpose of illustration setting forth the preferred embodiment of the invention Accordingly, a number of modifications and changes may be made without departing from the spirit and scoce of the present invention Therefore, the invention should not be limited by the specific terms employed, but only by the claims