MXPA00010983A - Absorbent article having improved integrity and acquisition - Google Patents

Abstract

Absorbent articles such as sanitary napkins, panty liners, adult incontinence devices, and the like, that have components that are bonded for improved integrity and an unbonded window on their body-facing side for improved acquisition are disclosed. The absorbent articles comprise a topsheet that is fused to an underlying liquid pervious or absorbent layer at a plurality of individual bonded areas. The absorbent articles have an unbonded window that is substantially free of bonded areas, which is surrounded by regions of the absorbent article that contain bonded areas.

Description

ABSORBENT ARTICLE THAT HAS IMPROVED INTEGRITY AND ACQUISITION FIELD OF THE INVENTION The present invention relates to absorbent articles such as sanitary napkins, pantiliners, adult incontinence devices, and the like. Still more particularly, the present invention is concerned with absorbent articles such as sanitary napkins, and the like having improved integrity and a disunited advantage over the side that gives the body for improved acquisition BACKGROUND OF THE INVENTION Of course, all the forms and varieties of absorbent articles configured for the absorption of body fluids such as menstruation, urine and faeces are well known. Absorbent articles are typically composed of a number of layers of material. These generally include, from top to bottom. , a liquid permeable layer, an absorbent layer, and a liquid impermeable layer Additional layers may also be interposed between any of these layers. These additional layers may serve different purposes. The layers of the absorbent articles are generally held together around their layers. peripheries by some conventional means, such as adhesives, glue, melt, and other methods known in the art Absorbent articles may have, and in many cases preferably will have, a liquid impervious joint around their periphery. This will not interfere with the function of the absorbs article nte However, it is also often desirable to bond the layers together on their surfaces. The fixing of the surfaces of these layers presents certain technical problems. This is particularly the case when it is desired to fix the upper layers permeable to the liquid and the absorbent layers. Fixing the layers on their peripheries often can not be used because they tend to block the flow of fluids towards the absorbent layers. A number of attempts have been made to address this problem. These have included the use of thermal fusion adhesives, and others adhesives that are not water based These adhesives will be less likely to dissolve when in contact with body fluids. Other attempts have been made to apply adhesives in very thin layers or in particular patterns to try to minimize the interference with the flow of water. the liquids to the underlying layers The patent of the United States s No. 4,573,986 issued to Minetola, and others on March 4, 1986 disclose a preferred way of applying adhesives Although the application of adhesives in the manner described in the Mmetola patent, and others works very well, the search for improved ways of insuring the faces of the layers of absorbent products has continued The main reason to look for improved ways to secure the faces of these layers is that in many cases, the adhesives which initially work properly, can eventually fail and cause them to come apart liquid permeable layers This problem is particularly apparent during the prolonged use of an absorbent article. This problem is often enhanced when the liquid permeable layer is a plastic film with openings. Although the plastic films with openings made with the patents owned by the transferee of the present invention work very well, certain problems may occur when They separate from their underlying layers. Plastic films are thin enough that they can move well in the folds of the user's body (such as space). between the user's buttocks) when they come to disengage This can be extremely uncomfortable and irritating Because of its plastic composition in some of these examples, the liquid-permeable layer can still stick to the user's skin. Adhesives can cause the film present a sticky surface close to the user's body which may contribute to causing the liquid-permeable layer to stick to the user's skin. Separation of the film with openings from the absorbent layers may also cause the exudates to run out of the overlying part. of the product along the longitudinal edges Besides, the exudates will not always penetrate the film if it is no longer an underlying absorbent layer in contact with the film so that the exudates will penetrate it. This is particularly true in the case of thick pads that have air felt blocks for their absorbent cores. Absorbent core of these thick pads tends to collapse and pile up (or collect transverse) in the center of the product at the first occurrence of wetting. This gathering or shirring, combined with the separation of the formed film, leaves the part of the pad adjacent to its longitudinal edges without any underlying absorbent material, thus increasing the possibility of spills or leaks on the upper part of the product along the longitudinal edges. Vanas patents describe absorbent products having layers held together in alternative ways for various different purposes. efforts are described in the patent from the United States Nos. 3,965,906 and 4,184,902 issued to Karami, United States Patent No. 4,391,861 issued to Butterworth, and others, United States Patent No. 4,397,644 issued to Matthews, and others, United States Patent No. 4,475,911 issued to Gellert , United States Patent No. 4,726,976 issued to Karami, and others, United States Patent No. 4,752,349 issued to Gebel, United States Patent No. 4,753,840 issued to Van Gompel, United States Patent No. 4823,783 issued to Willhite, Jr., et al., United States Patent No. 4,84, 965 issued to Foxman, and in United States Patent No. 4,908,026 issued to Sukíennik , and others The majority of these patents, however, do not disclose fusing the formed film with openings on the top of a liquid-permeable matepal or an absorbent material, such as a non-woven matepal. These patents also do not disclose providing an article. Absorbent with an unrestricted window on its side that gives the body for improved acquisition Therefore, a need exists for absorbent articles that have improved bonding between their layers, particularly between the upper liquid permeable layers Therefore, it is an object of the present invention provide absorbent articles having a bond between their layers, particularly the higher layers permeable to liquid, which maintain the fij sustained action even under prolonged use and are provided with increased controlled resistance to undesirable stacking. It is another object of the present invention to provide absorbent articles having liquid permeable layers that are bonded in a manner that does not interfere with the acquisition of liquids towards the absorbent layer. These and other objects of the present invention will be more readily apparent when considered with reference to the following description when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE INVENTION According to the present invention, there is provided an absorbent article, such as a diaper, a sanitary napkin, a pantiprotector, a device for adult incontinence or the like, which has a joined region to provide improved integrity and a window or loose opening on its side that gives the body for improved acquisition The absorbent article preferably comprises a sanitary napkin comprising a supepor sheet permeable to liquid such as a thermoplastic film with openings, a liquid-impermeable backsheet directly or indirectly attached to the topsheet, an absorbent core, and at least one acquisition component. The absorbent core is placed between the top sheet and the backsheet The acquisition component preferably comprises at least one layer of material, such as a fibrous nonwoven web The acquisition component can be either a separate component placed between the top web and the absorbent core, or this can comprise part of the web supepor or part of the absorbent core The upper sheet and the compos The acquisition areas are placed in a face-to-face relationship and the face of the top sheet is secured to the face of the acquisition component in discrete joined areas. The discrete joined areas are preferably formed by fusion joints. The bonded areas are preferably separated from each other. if and, in one embodiment, they are distributed on substantially the entire side to the body of the sanitary napkin, with the exception of a window or loose opening in a liquid-receiving area of the sanitary napkin The upper sheet with the acquisition component attached the same and the backsheet are preferably joined together along at least a portion of the periphery of the sanitary napkin. In other embodiments, especially in the case of thicker sanitary napkins, the joined areas may be arranged in a similar manner. , but the joints can be omitted from certain parts of the side that it gives to the body of the sanitary napkin (for example, in the s regions at the ends of the main body portion of the sanitary napkin) The attachment of the supepor sheet and the acquisition component is believed to achieve the objects stated above, among others. The merging of the surfaces of the topsheet and the acquisition component maintains these components in a joined condition., even under prolonged use This sustained fixation also facilitates the absorption of liquids towards the underlying layers by keeping an underlying absorbent layer in constant contact with the sheet of superheated film with openings The window without restriction provides a structure that does not interfere with the acquisition of liquids towards the underlying layers BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a top plan view of a preferred embodiment of sanitary napkin of the present invention. Figure 2 is a cross-sectional side view taken along line 2-2 of the sanitary napkin shown in Figure 1. Figure 3 is a cross-sectional side view taken along line 3-3 of the Figure through the central portion of one of the fins. Figure 4 is a top plan view of the top sheet of a sanitary napkin. thicker showing a preferred union pattern on it DETAILED DESCRIPTION OF THE INVENTION The present invention relates to absorbent articles such as sanitary napkins, pantiliners, incontinence devices, diapers and the like, which have components that are bonded for improved integrity and have a window or loose opening on the side facing the body for acquisition improved A preferred embodiment of a sanitary napkin 20 of the present invention is shown in Figure 1. As shown in Figure 1, sanitary napkin 20 preferably comprises an absorbent means (or "main body portion") 22, and two optional flaps The sanitary napkin 20 has two surfaces, a surface that gives the body or "body surface" 20A 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 worn adjacent to the user's body. The garment surface 20B is adapted to be placed adjacent to the wearer's undergarments when the sanitary napkin is worn. The sanitary napkin 20 has two centerlines, a main longitudinal centerline L and a sanitary napkin 20. main transverse centerline T The term "longitudinal", as used herein, refers to a line, axis or direction within the plane of the towel sanitary 20 which is generally aligned with (eg, approximately parallel to) a vertical plane that divides a user standing in left and right body halves when the sanitary napkin is worn 20 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 fins 24 The main body portion 22 has two spaced longitudinal edges 26, two spaced apart transverse or end edges (or "ends") 28, which together form the periphery 30 of the body portion Main 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 disposed between the end regions 32 and 34 The end regions 32 and 34 extend outwardly in the longitudinal direction from the edges of the central region 36 from 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 for a sanitary napkin is contained in U.S. Patent No. 4690,680 issued to Higgins on September 1, 1987. The sanitary napkin 20 has a longitudinal central region 16 disposed along the length of at least a portion of the main longitudinal centerline. L, and longitudinal side regions 18 transversely outside the longitudinal central region 16 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") A 20"ultra-thin sanitary napkin as described in US Pat. Nos. 4, 950,264 and 5,009,653 issued to Osborn preferably has a smaller caliber of approximately 3 millimeters The modality of the sanitary napkin 20 shown in Figures 1 to 3 of 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 user. However, it should be understood that the sanitary napkins shown are merely two examples of the embodiments, and that the present invention is 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 sanitary napkin 20 of the present invention. The main body portion 22 of the sanitary napkin preferably comprises at least four main components These include a top sheet 38 permeable to the liquid, a backsheet 40 liquid impermeable, an absorbent core 42 positioned between the topsheet 38 and supepor backsheet 40, and at least one acquisition component 44 The acquisition component 44 can be either a separate component placed between the topsheet 38 and the absorbent core 42, or it can comprise part of a mixed top sheet or part of the absorbent core 42 The components of the sanitary napkin 20 can be compounds of any suitable materials that are capable of being bound in the manner described herein. The supepor sheet 38 is a liquid permeable component that allows liquids (eg, menstruation and / or urine) to easily penetrate through its thickness The topsheet 38 is preferably as compliant as to feel soft, and non-irritating to the wearer's skin as possible. A suitable top sheet 38 can be manufactured from a wide range of materials such as woven and non-woven materials, polyester materials such as thermoplastic films formed with openings, plastic films with openings, and thermoplastic films hydroformed, foams po roses, crosslinked foams, crosslinked thermoplastic films, and thermoplastic liners Suitable woven and nonwoven fabrics may be composed at least partially of natural fibers (eg, wood or cotton fibers), of synthetic fibers (eg, polymer fibers such as as polyester, polypropylene, or polyethylene fibers) or from a combination of natural and synthetic fibers A preferred top sheet type comprises a film formed with openings. Films formed with openings for the supepor sheet are preferred because they are permeable to body exudates and, if properly perforated, have a reduced tendency to allow liquids to flow through. return from and return to wet the skin of the user In this way, the surface of the formed film that is in contact with the body remains dry, thus reducing the staining of the body and creating a more comfortable feeling for the user The films formed adequate are described in U.S. Patent No. 3,929,135 entitled "Absorption structures having tapered capillaries", which was issued to Thompson on 30 December 1975, U.S. Patent No. 4,324,246 entitled "Disposable Absorbent Article Having a Stain Resistant Top Sheet", which was issued to Mullan, et al. on April 13, 1982, United States Patent No. 4,342,314 entitled "Elastic plastic weave that exhibits properties similar to fiber", which was issued to Radel, and others on August 3, 1982, United States patent No. 4,463,045 entitled "Macroscopically expanded three-dimensional plastic weft exhibiting a non-glossy visible surface and a fabric-like fingerprint", which was issued to Ahr et al. On July 31, 1984, U.S. Patent No. 4,637,819 entitled "Three-dimensional, macroscopically expanded polymeric web to transmit both dynamically deposited and statically contacted fluids from one surface to the other", which was issued to Ouellette, et al. On January 20, 1987, United States Patent No. 4,780,352 entitled "Cover structure for hygienic sanitary absorbent product, and absorbent product having said cover", which was issued to Palumbo on October 25, 1988, United States Patent No. 5,006, 394"Multilayer Polymer Film" issued to Baird on April 9, 1991, and in the United States patent application No. 08 / 442,935 entitled "Tr fluid fluid exhibiting energy gradients on the surface "presented in the name of Ouellette, et al. on May 31, 1995 (PCT Publication WO 96/00548, published January 11, 1996) The terms" openings "and" with "openings" can include holes and / or slits that create passages through the film layer from one surface to the other. The openings can all be of the same size and shape, or these can be of different sizes and shapes. The openings can be located or these may extend through the total surface of the film 38. When the opening is located, it may be in the form of a longitudinal central portion or strip separating two longitudinal side portions of the film which are not openingsit.

In addition, the total top sheet can be made from a film or the longitudinal central portion can be made from a film and the longitudinal side portions can be made from another material such as a fibrous nonwoven web The film with openings 38 can be made from a number of suitable materials Suitable polymers from which the apertured film 38 is formed include any material that can be formed into a film including, but not limited to, polyolefins and polysaccharides, as well as copolymers and mixtures thereof Specific polymers include, but are not limited to, polyethylene (PE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE) and ethylene vinyl acetate (EVA) Typically, film with openings 38 will have a thickness between about 0 025 and about 1 0 millimeters and a percent open area due to perforation Between about 10 and about 40% based on the surface area of the film with openings 38 The percent of open area is calculated by specifying a unit area, calculating the surface area of all open areas within the unit of specific area , dividing this total open area by the total area within the unit of specific area and then multiplying the quotient by 100 to produce the open area percent. The size and number of openings can be varied depending on the viscosity and other fluid properties. of the body that is transported through the apertured film 38. In the preferred embodiments of the present invention, the body surface of the upper sheet 38 is hydrophilic in such a manner that liquids will be transferred through the upper sheet more easily. This decreases the likelihood that menstrual fluid will flow out of the upper leaf instead of flowing r towards and be absorbed by the absorbent core The body surface of the supepor sheet can be hydrophilic by treating it with a surfactant. Suitable methods for treating a sheet The top sheet with a surfactant is disclosed in U.S. Patent No. 4,950,254 issued to Osborn. In a preferred embodiment, the topsheet 38 comprises an apertured formed film made in accordance with U.S. Patent No. 4,342,314 issued to Radel, and others and 4,463,045 issued to Ahr, and others, which is marketed in sanitary napkins as the top sheet DRI-WEAVE by The Procter & Gambling Company of Cmcinnati, OH Said film with apertures is preferably obtained as the product No X-5652 from Tredegar Film Products of Terre Haute, IN In this preferred embodiment, during manufacture the resin used to form the film with apertures is preferably provided with a surfactant incorporated therein The acquisition component (or "acquisition layer") 44 is located below the upper sheet 38 The terms "layer" or "pattern", as used herein, include but are not limited to sheets simple unfolded, folded sheets, strips of material, loose or bonded fibers, multiple layers or laminates of material, or other combinations of these materials These two terms are thus not limited to single layers or sheets of unfolded material The acquisition component 44 can provide the hollow volume under the upper sheet 38 to increase the ability of the sanitary towel to draw liquids through s of the upper sheet 38 In the preferred embodiment described herein, the acquisition component 4 preferably provides resiliency to the lateral compression forces such that the sanitary napkin 20 has improved resistance to stacking. The acquisition component 44 may have a size of effective average pore that is equal to that of the upper sheet 38, or smaller than that of the upper sheet The acquisition component 44 must be liquid permeable The acquisition component 44 is also preferably docile, of soft feel, and not irritating to the skin of the user The acquisition component 44 has a surface that faces the body (or side), and a surface that gives the garment The acquisition component 44 can be of any suitable size and shape In the embodiment shown in FIG. Figure 1, the acquisition component 4 is in the form of a race track with slightly concave side edges, as is the part of the top sheet 38 that covers the main body portion 22 of the sanitary napkin 20 acquisition 44, however, are preferably not as large as those of the topsheet 38 In other embodiments, such as the case of thicker sanitary napkins, such as the sanitary napkin shown in Figure 4, the acquisition component may be in the shape of a piece of material that is smaller than the absorbent core 42 The acquisition component 4 can be made from any of the materials suitable for previous purposes that are capable of having the upper sheet 38 fused thereto. The acquisition component 44 may, for example, be composed of woven or nonwoven materials. Fibers or other components of these materials may be synthetic, or partially synthetic and partially natural fibers Suitable synthetic fibers include polyester fibers, polypropylene, polyethylene, nylon, viscose rayon, or cellulose acetates. Suitable natural fibers include cotton, cellulose, or other natural fibers. The acquisition component 44 may also be at least partially comprised of fibers. of cross-linked cellulose The acquisition component 44, if not woven, can be processed by a number of different processes. These include, but are not limited to, air laying, wet laying, melt blowing, bonding, carding, thermally bound, bound with continuous air, bound with dust, bound with latex, enl welding with solvent, linked by rotation and combinations of the above Suitable thermally bonded nonwoven webs (which may be referred to as "TBOWL" for brevity) are described in U.S. Patent No. 5,549,589 entitled "Fluid distribution member for absorbent articles exhibiting high suction and high capacity" issued to Horney et al. August 1996 In the embodiment shown in the drawings, the acquisition component 44 preferably comprises a laminate of two materials. The uppermost layer of this laminate (or "secondary topsheet") 46 preferably comprises a spunbonded polypropylene non-woven material. 5 g / m2 referred to as the product No 065MLPV60U or ("P-9") obtained from Fiberweb, North America of Washougal, WA The highest layer preferably has a hollow volume of approximately 11 2 cm3 / g measured at 689 dynes per centimeter square (0 01 psi), and an average pore size, measured using the Laplace / Washburn equation for capillary care of between 60 and about 70 microns. The underlying layer of the laminate (or "tertian supepor sheet") 48 preferably comprises a multi-bonded air laid material that is thermally bonded using a powder weave or latex weave. In a preferred embodiment, this multi-bond air laid material comprises about % cellulose fibers, and about 20% powder binder, and about 3% latex coating (1% 5% sprayed on each side of the weft) and has a basis weight of about 60 g / m2 (unless stated otherwise, all percentages here are by weight) Such multi-bonded air laid material is preferably obtained as the product No 90830X312 from Merfin Hygienic Products, Ltd of Delta, Bptish Columbina, Canada These two layers are preferably laminated together by depositing the air-laid multi-bonded matepal on a spun polypropylene non-woven material glued The glued spun material is used as a processing aid or a carrier web in the process of forming this laminate The laminate preferably has a gauge of approximately 1 2 mm measured at a pressure of 68 Pascais, and a hollow volume of approximately 136 cm3 / g measured at 689 dynes per square centimeter The acquisition component 44 is preferably hydrophilic The acquisition component 44 may be more hydrophilic than the absorbent core, or it may have the same hydrophilic capacity as the absorbent core If desired, the acquisition component 44 can be treated with a surface active agent to provide to make it more hydrophilic Preferably, it has the same hydrophilic capacity as the absorbent core In alternative embodiments, the spunbonded polypropylene nonwoven material can have a higher basis weight or smaller, or it can be replaced by a tissue placed by air, a wet-laid tissue, or any of the materials described above If a wet-laid tissue is used instead of a non-woven polypropylene material, the orientation of the laminate is preferably reversed such that in the finished product, the non-woven material placed by multi-bonded air is located above the wetted tissue layer. In the case of thicker sanitary napkins, any of the acquisition components described above can be used. Additionally, in a preferred embodiment of thicker sanitary napkin, an air-laid material attached with low-density latex can be used as the total acquisition component (ie, the tertiary top sheet is not required) An air-laid matepal with low density latex suitable for this purpose is a material which has a basis weight of approximately 80 g / m2 known as product No FG 13MHB, which is obtained from Walki Soft, USA from Mt Holly, NC The top sheet 38 is generally described herein as being fused to the acquisition component 44. This has been done for simplicity of description (it is easier to discuss a preferred embodiment than to describe all the described modes simultaneously). The top sheet 38 can be cast in one or more other underlying components In the broadest sense, the top sheet comprises a first component that is fused to a second underlying component The second component can be a separate component Alternatively, the second component can be part of another component, such as part of the upper sheet, part of the core, or part of some other component In still other alternative embodiments, the acquisition component 44 may be omitted entirely In the embodiments wherein the acquisition component 44 is an integral layer of the core 44 or omitted altogether, the upper sheet 38 can be considered to be melted apart from the core or absorbent 42 In embodiments without an acquisition component 44, the absorbent core 42 may comprise at least some types of fiber (preferably synthetic fibers) that the topsheet 38 may melt A sufficient amount of these fibers are preferably located near the surface that gives the body of the absorbent core 42 to facilitate the melting. Alternatively, if the absorbent core (or other underlying component) comprises powder binder, the topsheet 38 can be fused to the powder binder in the absorbent core 42 (or underlying component) In the preferred embodiment shown in the drawings, the acquisition component 44 is preferably attached to the upper sheet of film with openings 38 by fusion bonding the surfaces of the apertured film 38 and the laminate of the acquisition component 44. they are united through a region of their surfaces that form a "united region" 50 on the side that gives the body 20A of the sanitary napkin 20 The topsheet 38 and the laminate 44 are preferably joined in a plurality of discrete joined areas (or "joints") 52 (However, it is also within the scope of the present invention that one or more individual links 52 are in contact between if in such a way that these are not separated and not discrete) In the embodiment shown in Figure 1, the joined areas 52 are preferably separated and distributed on the side facing the body 20A of the sanitary napkin 20, with the exception of a part thereof defining an unrestricted window 54 in a liquid receiving area of the sanitary napkin The discrete joined areas preferably comprise fusion joints 52 The fusion can be achieved by thermal and / or pressure joints, ultrasonic joints, dynamic joints Mechanical, and the like Pressure can be applied in any suitable manner, such as by moving the components that will be joined between turning rollers found, placing the materials on an anvil and forcing a platen down onto the materials, applying vacuum pressure and the like. Suitable means that can be adapted for use in melting the top sheet 38 to the acquisition component 44 are described in at least some of the following patents U.S. Patent No. 4,430,148 Schaefer, U.S. Patent No. 4,515,595 Kievit, and others, U.S. Patent No. 4,531, 999 Persson, and others, U.S. Patent Nos. 4,710,189 and 4,808,252 issued to Lash, U.S. Patent No. 4,823,783 Willhite, Jr., et al., and in U.S. Patent Nos. 4,85,484 and 4,919,756 issued to Ball, et al., and in the United States patent application. granted No of sene 07 / 944,764 filed in the name of Cree, and others, on September 14, 1992, the main application that was published on June 24, 1993 as PCT publication No. WO 93/11725 E The fusion ligament preferably comprises a plurality of individual fusion bonds 52 which are arranged in a pattern. they may be arranged in many different patterns. Figures 1 and 4 show two particularly preferred joining patterns. The individual joints 52 forming the pattern may be in any way seen in plan. For example, the joints 52 may be in the form of straight lines or curves, geometric figures such as circles, squares, rectangles, diamonds, and the like, or irregular shapes In this embodiment, the fusion joints 52 comprise a plurality of circular joints. The fusion joints 52 may be of any suitable size, and may be distributed through the side facing the body 20A of the sanitary napkin in a range of suitable densities The fusion joints 52 preferably have a diameter that is greater than about 1 mm and varies up to less than about 3mm In the sanitary napkins 20 shown in FIG. Figs. 1 and 4, the fusion joints are preferably about 1 5 to 2 0 mm in diameter. o It is preferred to provide fusion joints within this range of sizes, especially with the material of the upper film sheet with DRI-WEAVE openings Providing fusion joints 52 with smaller diameters creates manufacturing difficulties In particular, difficulties are encountered because the application of the pressure necessary to produce a joint by an element having a surface area of less than about 1 mm in diameter will tend to perforate the material of the upper sheet of film with openings Providing fusion joints 52 with diameters greater than or equal to 33 mm in diameter has been found to negatively impact consumer acceptance of the upper sheet material of open film The open film is designed to allow liquids to pass through only one direction Provides joints that have that larger size results in an increased belief of that now a tendency for liquids to be "squeezed" under pressure and to pass back through the joints and re-wet the user's skin The edges of the fusion joints 52 are preferably spaced more than about 0 5 mm apart in all directions The narrower spacings of the joints have also been found to have a tendency to collapse the structure of the film with openings, which leads to to the upper rewet The melt joints 52 are preferably distributed in a density that not only improves the performance of the sanitary napkin, but also improves the user's perception of the softness of the sanitary napkin and its absorbency A bonding density of between about 15 to 80 joints per 9 cm2 (including the area of the open window) is especially preferred for these purposes. Lower bonding densities will tend to leave users with a perception of lower absorbency. Higher bonding densities will tend to negatively impact the absorbency The bond density does not need to be uniform over its Overall surface of the sanitary napkin For example, it will be appreciated from the views of Figures 1 and 4 that there will be areas on the surface of the sanitary napkin as in the closed geometrical figure (described below) surrounding the window without restriction 54 which will have joining densities at the upper end of this range, and other areas that will have bonding densities at the lower end of this range. The fusion joints 52 preferably cover between about 5% to about 15%, and more preferably from about 8% to about 12% of the area on the surface of the sanitary napkin 20 covering the largest of the underlying absorbent layers In the embodiment shown in Figure 1, the circular joints 52 are arranged in a pattern that is preferably distributed over substantially all of the body surface 20A of the main body portion of the sanitary napkin 20, with the exception of Ion of the unrestricted window 54 within the receiving area of sanitary towel liquid In the embodiment of a thicker sanitary napkin shown in Figure 4, the seams 52 may only be distributed over substantially all of that portion of the main body portion 22 of the sanitary napkin 20 that covers the component of acquisition 44 (which is in the form of a rectangular patch), with the exception of the unrestricted window 54 within the liquid receiving area of the sanitary napkin The liquid receiving zone is the part of the sanitary napkin that is located below the user's pepneal area Preferably the area of the unrestricted window 54 is at least as large as, or greater than, the user's pepneal area. Preferably, this area is greater than about 1 cm in width in the transverse direction and is greater than about 5 cm in length The size of the unrestricted window 54, however, is preferably not so large that the film with openings 38 is a capable of appreciably separating contact with the underlying acquisition component 4 in the area of the window without restriction 54 due to the lack of attachment therein In the sanitary towel 20 shown in Figure 1, the window without restriction or disengagement 54 is preferably centered around the longitudinal and transverse center lines. However, in other embodiments, particularly in which the sanitary napkin is asymmetrically formed around the transverse center line, the unrestricted window 54 may be displaced forward or backward with relation to the transverse centerline In the preferred embodiment shown in Figure 1, the unrestricted window 54 is defined by a plurality of fusion joints 52 arranged in a configuration of a closed geometric figure 56. The closed geometric figure 56 is formed by a plurality of fusion joints 52 arranged in a line number curvilinear, opposite, concave, inwardly oriented, around the window without restriction 54 The transverse width dimension of this figure is preferably about 1 9 cm at its narrowest point The length or longitudinal dimension of this figure is preferably about 8 9 cm as measured along the longitudinal center line of the sanitary napkin 20 The curvilinear lines forming the closed geometric figure preferably they include a pair of longitudinally oriented concave lines 56A. The longitudinally oriented concave lines 56A preferably each comprise two rows of joints wherein the joints 52 in adjacent rows are disposed in a side-by-side manner. These joints 52 are preferably relatively closely spaced. junctions 52 may, if desired, be designed to impregnate liquids in the longitudinal direction and provide a barrier to the flow of exudates in the transverse direction, particularly menstruation, such that menstruation will not approach the longitudinal lateral edges 26 of the towel sanitary 20 The ends of the closed geometric figure surrounding the unrestricted window 54 are preferably formed by curvilinear lines 56B that form cusped shapes The intersection of the two arcs comprising the cusped shapes is located throughout of the longitudinal centerline of the sanitary napkin These curvilinear lines 56B which form the cuspal shaped figures also preferably comprise approximately two rows of seams, but these seams are not exactly in a side-by-side pattern There are also seams 52 located longitudinally and laterally outside the closed geometrical figure 56 The fusion ligament preferably surrounds the window without restriction 54 The fusion junctions 52 are preferably located in the first end region 32, in the second end region 34, and in the longitudinal side regions 18 of the sanitary towel 20 In the modality shown in Figure 1, the external fusion joints 52 for the unrestricted window 54 are preferably distributed over substantially all of the side facing the body 20A of the main body portion 24 of the sanitary napkin which is inside some perimeter seal. These last seams 52 may also be arranged in a number of suitable patterns. Preferably, the adhesion forms a "cushion pattern." More specifically, the seals 52 are preferably arranged in a pattern comprising a plurality of circular joints arranged in a diamond shape 57A The joints forming the diamond shape 57A preferably enclose a plurality of joints that also form a figure 57B This closed figure 57B may vary from a modified (or rounded) diamond shape to an oval shape In the longitudinal side regions 18, only a portion of the diamond-shaped figures are present due to space limitations For processing reasons, most of the joints in The padded pattern are preferably separated in the longitudinal direction dinal at a distance that is equal to the radius of the joints multiplied by the square root of three The acquisition component 4 can also be at least partially attached to the topsheet 38 by adhesives If adhesives are used, the adhesives can be distributed through the total interface between the upper sheet 38 and the acquisition component 44 Preferably, however, no adhesives are applied between these two components in the region of the window without restriction 54. Any of the appropriate adhesives for this purpose can be used, with preferred moisture-resistant adhesives Moisture-resistant adhesives are those that retain their ability to bind in the presence of liquids Suitable moisture-resistant adhesives are described in U.S. Patent No. 5,460,622 issued to Draggo, and others on October 24, 1995 If adhesives are used, they should not interfere with the transfer of e the liquids from the top sheet to the underlying acquisition layer or other underlying layers The adhesives can be applied in a continuous uniform layer as fibers of meltblown adhesives, or a patterned layer, or an array of spaced apart lines, coils, or adhesive dots Adhesive bonding means preferably comprise a network of filaments of open-pattern adhesives as disclosed in U.S. Pat. No. 4,573,986 issued to Mínetela et al., March 4, 1986, or an open-pattern filament network comprising several lines of twisted adhesive filaments in a spiral pattern as illustrated by the apparatus and method shown in the US Pat. United States No. 3,911,173 issued to Sprague, Jr. on October 7, 1975, United States Patent No. 4,785,996 issued to Ziecker, and others on November 22, 1978, and in United States Patent No. 4,842,666 issued to Werenicz June 27, 1989 The joining of the acquisition component 44 to the underside of the upper sheet 38 on substantially the total surface of the side facing the body 20A provides There are several advantages The joining of the acquisition component 44 to the top sheet maintains an absorbent component in constant contact with the top sheet for improved acquisition This also prevents the top sheet from separating from the underlying absorbent component and moving towards the folds in the body of the absorbent component. user to cause discomfort The strength of the fixation between these layers is improved in relation to the adhesively fixed layers of currently sanitary towels ALWAYS ULTRA Because of this improved fixation and its elastic nature of these materials comprising the acquisition layers, the sanitary napkin 20 undergoes less undesirable stacking during use and, therefore, able to better cover a maximum area of the wearer's panties (ie, "area protection" is improved) In the case of sanitary napkins thicker, the integrity of the sanitary napkin is vastly improved compared to the Thick sanitary napkins having absorbent cores of air felt under humid conditions Typically, in the sanitary napkins having air felt cores, the air felt will tend to collapse and sink and / or form balls or harder areas when wetted In the case of thicker sanitary napkins provided with the features of the present invention, nevertheless , the force required to join the sanitary napkin is very restricted without considering that the sanitary napkin is wet or dry This indicates that the resistance to clumping or stacking is similar under wet and dry conditions In addition, the unrestricted window 54 provides the side that gives to the body 20B of the sanitary napkin 20 with a region in the liquid receiving area that is free of joined areas to eliminate any interference with the acquisition of liquids caused by the presence of the joints and to maximize the liquid handling capacity of the liquid. the sanitary towel The absorbent core 42 is located below the acquisition component 44 The absorbent core 42 can be any absorbent means that is capable of absorbing and retaining the liquids (eg, menstruation and / or urine) The absorbent core 42 has a surface which gives the body a surface that gives the garment, side edges, and end edges The absorbent core 42 can be manufactured in a wide variety of sizes and shapes (e.g., rectangular, oval, hourglass, bone dog, asymmetric, etc.) In the preferred embodiment shown in Figure 1 of the drawings, the absorbent core 42 is rectangular and is of a size that is slightly In the embodiment shown in Figure 4, the absorbent core 42 is dog-bone shaped, and is longer than the acquisition component 44. The absorbent core 42 can be fabricated from a Wide variety of liquid absorbent materials commonly used in sanitary napkins and other absorbent articles Examples of suitable absorbent materials include ground wood pulp which is generally referred to as air felt, wadding creped cellulose, meltblown polymers including coform, chemically hardened, modified or crosslinked cellulosic fibers, synthetic fibers such as pleated polyester fibers, peat moss, tissue including tissue wrappers and tissue laminates, absorbent foams, absorbent sponges, polymers superabsorbents, absorbent materials, or any equivalent material 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 variable gauge (eg, profiled to be thick in the center), hydrophilic gradients, superabsorbent gradients, or acquisition zones with lower density and lower average basis weight, or may comprise one or more layers or structures) However, the total absorbent capacity of the absorbent core must be compatible with the Load design and intended use of the sanitary napkin In addition, the size and absorbent capacity of the absorbent core can be waisted to encompass the different uses such as incontinence pads, pantiliners, regular sanitary napkins, or night sanitary napkins. In the preferred embodiment shown in the drawings, the core absorbent 42 preferably comprises a multi-attached air-placed material In this preferred embodiment, the multi-bound air-laid material comprises from about 50% to about 70% cellulose fibers, from about 12% to about 20% two component fibers, from about 10% to about 30% superabsorbent particles of hydrogel-forming material (or gelling absorbent material), and of about 3% latex Absorbent core 42 preferably has a caliber of about 1-5 mm under a pressure of 68 9 Pascais, and a base weight of aproximadament e 150 g / m2, including the particles of the gelling absorbent material (although materials with much higher basis weight can also be used) Preferably, this multi-attached air-absorbing core 42 is formed by depositing three streams of cellulose fibers and two components, with particles of absorbent gelling material 58 placed with the last stream of fibers to form the bottom of the absorbent core. the absorbent core 42 is shown as a laminate in Figures 2 and 3, in the preferred embodiments, the fibers are mixed together to form a simple weft. This multi-attached air-laid material is preferably obtained in the form of a roll. as the 915000X313 product of Merfin Hygienic Products In alternative embodiments, the multi-bonded air-laid material used for the absorbent core can be bonded using some material other than latex (such as starch or PVA, for example) In other alternative embodiments , the absorbent core can be formed as a laminate that It also preferably has a basis weight of about 150 g / m2 and comprises two layers (or more) of air-laid nonwoven material multiplexed with the particles of the gelling absorbent material therebetween. The structures of the suitable laminated absorbent core are generally described in U.S. Patent Nos. 4950, 264 and 5,009,653 issued to Osborn, U.S. Patent No. 5,460,623 issued to Emenaker, and others. Other suitable absorbent core is disclosed in U.S. Patent Application No. of sene 08 / 122,114, entitled "Sanitary towel that has predisposed the core to a convex configuration upwards", presented in the name of Hiñes, and others on September 16, 1993 (PCT Publication No WO 95/07674, published on 23 March 1995) In the above embodiments, or in other alternative embodiments, the absorbent core 42 may be provided with a feature to further enhance or flexibility Such a feature may include, but is not limited to, one or more slits, perforations, embossments, marked lines in the absorbent core 42 or in the component of acquisition 4 This type of feature is preferably arranged to improve the flexibility around the main longitudinal centerline of the sanitary napkin. The slots, perforations, enhancements, or marked lines may be in any suitable configuration. Suitable configurations include, but are not limited to to straight or curved lines, slots, dots, V-shaped patterns, W-shaped patterns, or the like. Slits, perforations, enhancements, or marking lines, or any combination thereof may be provided in any of the layers of the laminated absorbent cores described above An example of a feature that will improve the flexibility of the absorbent core 42 is a marking line in the absorbent core running along the main longitudinal centerline of the sanitary napkin In the case of towels thicker sanitary ware, the absorbent core 42 is preferably co Air felt set Suitable absorbent cores for thicker sanitary napkins are described in U.S. Patent No. 5,234,422 issued to Sneller, et al. In a preferred embodiment, top sheet 38, the acquisition component 44 and the absorbent core 42 can be provided with raised channels as shown in the Sneller patent, and others. As shown in Figure 4, if these raised channels 59 are used, these are preferably located laterally. outside the longitudinally oriented concave lines 56A defining the sides of the window without restriction 54 The backsheet 40 prevents the exudates absorbed and contained in the absorbent core 42 from wetting the articles that are in contact with the sanitary towel 20 such as underpants, pajamas and undergarments The backsheet 40 is preferably resistant to the flow of liquids, and more preferably is impervious to liquids (e.g., menstruation and / or urine). The backsheet 40 is preferably made from a flexible material as shown in FIG. used here, the term "flexible" is refers to materials that are docile and easily conform to the figure and general contour of the human body. The post-foil sheet 40 may comprise a woven or non-woven material, polymeric films such as polyethylene or polypropylene thermoplastic films, or mixed materials such as a material film-coated nonwoven Preferably, the backsheet 40 is a polyethylene film having a thickness of about 0 012 mm to about 0 051 mm. The backsheet 40 can be finished in highlight and / or dull to provide a more similar appearance to the fabric In addition, the backsheet 40 can allow the vapors of the absorbent core 42 (ie, breathable) to escape while still preventing the exudates from passing through the backsheet 40. A suitable material from the backsheet is obtained as the product No 18-1401 from Clopay Corporation of Cin nnati, Ohio A suitable breathable back sheet material is a laminate of an apertured film such as that described in U.S. Patent No. 3,929,135 issued to Thompson which is inverted in such a way that the smaller apertures of the tapered capillaries give the absorbent core 42 which is adhesively laminated to a microporous film such as that described in U.S. Patent No. 4,777,073 to Exxon. The supepor sheet 38, the acquisition component 44, the backsheet 40, and the absorbent core 42 can be assembled in a variety of configurations known in the art. (including layered or "sandwich" configurations and wrapped or "tube" configurations) FIGS. 1 to 3 show a preferred embodiment of the sanitary napkin 20 assembled in a sandwich construction. In Figures 1 to 3, the top sheet 38 and the backsheet 40 have length and width dimensions generally greater than those of the absorbent core 42 The top sheet 38 and the backsheet 40 extend beyond the edges of the absorbent core 42 to form the periphery parts 30 The side that gives the garment the top sheet 38 is preferably attached to the side facing the body of the acquisition component 44 as described above. The acquisition component 44 can be attached to the absorbent core 42, if desired. If these components are attached, they can be attached in any of the manners described herein to join the top sheet 38 to the acquisition component 44 However, in the embodiment shown in the drawings, the acquisition component 44 is not directly bonded to the absorbent core 42 The backsheet 40 is preferably attached to the garment side of the absorbent core by means of adhesives The parts of the upper sheet 38 and of the rear sheet 40 extending beyond the edges of the absorbent core 42 and the acquisition component 44 are also preferably bonded together These parts of the upper sheet 38 and of the rear sheet 40 may be joined in any suitable manner known in the art. The term "attached", as used in this description covers configurations in which one element is directly secured to another element by fixing the element directly to the other element, configurations in which the element is indirectly secured to the other element by fixing the element to a member or intermediate members which in change 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. Preferably, in the embodiment shown, these parts of the sheet exceed 38 and the sheet rear 40 are joined using adhesives on substantially the total parts extending beyond the edges of the absorbent core 42 and of a crimping seal at the end edges 28 of the main body portion where the top sheet 38 and the sheet are densified back 40 by applying pressure or heat and pressure The sanitary pad 20 shown in Figures 1 to 3, as shown in FIG. discussed above, comprises a pair of optional fins 24 that are attached to the portion main body 22 The fins 24 extend laterally outwardly beyond the longitudinal side edges 26 of the main body portion 22 from their proximal edges 60 to the distant edges 62 (or "free end") The fins 24 extend outwardly from at least the central region 36 of the main body portion 22 As shown in Figure 1, each flap 24 is divided into a front half 64, and a rear half 66 by a transverse center line of T-wing, The line The transverse center of fin Ti may coincide with the main transverse center line T of the sanitary napkin, but this is not absolutely required The vanes 24 may be attached to the main body portion 22 in any suitable manner Preferably, in the embodiment shown in FIGS. Figures 1 to 3, the fins 24 are integral with the main body portion 22 (i.e., the fins 24 comprise integral extensions of the upper sheet erior 38 and the back sheet 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 union This is typically a longitudinally oriented (or "longitudinal") junction, such as the junction lines 68. As used herein, the terms "junction" (or "junction line") refers to regions where the fins 24 extend from of or are attached to the main body portion 22 The connecting line 68 in the embodiment illustrated in the drawings may be considered to be defined by inward facing concave regions or lines The fins 24 may be in any suitable configuration Suitable fins are described in the reexamined patent No. B1 4,589,876 entitled "Sanitary towel", issued to Van Tilburg, certificate of reexamination issued on April 27, 1993, United States patent No. 4,687,478 entitled "sanitary towel configured with fins", which was issued to Van Tilburg on August 18, 1987, patent No. 5,389,094 entitled "Absorbent article having fins and zones of differential extension capacity" issued to Lavash, et al. on February 14, 1995, United States Patent No. 5,558,663 entitled "Absorbent article having cover components. of the undergarment with zones of extension capacity ", issued to Weinberger, and others on September 24, 1996 (which describes an alternative to the fins that are applied by the user), and in the international patent application No PCT US 96/15957 entitled "Absorbent article having fins with stepped configuration and zones of extension capacity", filed on October 3, 1996, in the name of Lash, and others The sanitary pad 20 shown in Figures 1 to 3 preferably has a deformed region that forms a hinge 70 between the main body portion 22 and at least a portion of the fins 24 The sanitary napkin 20 also preferably it has at least one zone of extension capacity (or "zone of differential extension capacity") 72 to release the tensions on the fins 24 when they are folded around the crotch of a pantyhose. These characteristics are each described below. sanitary napkin shown in Figures 1 to 3, the hinge 70 comprises a mechanically deformed region, longitudinally oriented generally. The hinge 70 provides a region of the sanitary napkin 20 with increased flexibility to create the preferred bending shafts so that the flaps 24 bend or flex around The joint 70 is preferably located in a region of the length of the joint 68 of the fins 24 with the main body portion 22 The joint 70 can extend along the total joint 68 of the fins with the portion of main body, or along only a part of it If joint 70 is only provided along a part of the joint 68, is preferably provided in the region of the sanitary towel 20 that surrounds and that includes the transverse centerline of the Ti fin. articulation 70 has a boundary laterally further inward, or proximal 70A and an outermost or distant boundary 70B In the embodiment shown in Figures 1 to 3, at least the inwardmost boundary 70A of articulation 70 is preferably concave inwardly relative to the distant edge of the flap 24 The hinge 70 can be formed in any suitable manner that provides the desired region of the sanitary napkin with increased flexibility Preferably, the hinge 70 is formed by mechanically deforming the desired regions of the sanitary napkin. found that many processes suitable for providing regions of the sanitary towel with extension capacity are particularly suitable for providing regions of the sanitary pad selected for the joint 70 with increased flexibility. The joint 70 can, for example, be formed by a process that has been described as pre-corrugated (or "rolling with ring"), or by a process that involves forming a stretchable network in the desired portion of the sanitary napkin. Suitable methods for ring rolling are described in U.S. Patent No. 4,107,364 issued to Sisson et al. August 15, 1978, United States Patent No. 5,143,679 issued to Gerald M Weber, and others on September 1, 1992, United States Patent No. 5,156,793 issued to Kenneth B Buell, and others on October 20, 1992, and in U.S. Patent No. 5,167,897 issued to Gerald M Weber, and others on December 1, 1992. Preferably, as shown in Figure 1, hinge 70 is provided by forming a stretchable network region along the joining 68 of the fins 24 with the main body portion 22 The process for forming a stretchable network region, and the structures formed thus are described in greater detail in U.S. Patent No. 5,518,801 issued to Chappell, and others on May 21, 1996 The term "tensable network," as used herein, refers to a group of interconnected, interconnected regions that are capable of spreading to some useful degree in a predetermined direction The tense network 74 comprises at least two distinct and different regions that are designated as the first region 76 and the second region 78 In the embodiment shown, the tense network 74 includes a plurality of first regions 76 and a plurality of second regions 78 As shown in Figures 1 to 3, the first regions 76 are substantially planar regions. That is, the material within the first region 76 is in substantially the same condition before and after the formation of the network. Tense 74 The second regions 78 include a plurality of interconnected, continuous, rib-shaped deformations 80, which extend alternately beyond the plane of both surfaces of the first region 76. Figure 1 shows that the fin material 24 which has the tensile network 74 formed there having a longitudinal centerline (or axes), I In the sanitary towel mode it shows In Figure 1, the longitudinal center line, I, of the tensionable net 74 is rectilinear and is generally oriented in the transverse direction. In the sanitary napkin 20 shown in Figure 1, the first regions are substantially linear, extending continuously in a direction substantially parallel to the longitudinal axis I of the tensionable network The articulation 70 is created by forming the tensionable net 74 in the desired part of the sanitary napkin 20 As used herein, the term "formed" refers to the creation of a structure or desired geometry on a weft or laminate material that will substantially retain the desired structure or geometry when not subjected to any of the elongations or externally applied forces. Suitable methods for forming a stretchable network in a weft material include, but are not limited to to stamping in relief by means of splicing plates or rollers, thermoforming, hydraulic formation of high pressure, and vac gone The depth and number of the deformations 80 in the tensionable net 74 can be varied to control the applied force or elongation required to spread the material in the articulation regions 70 of the sanitary napkin 20 In one embodiment, the deformations 80 can be formed by two rigid plates that have a gear tooth pattern The external dimensions of the tooth pattern cover a surface area of the plates that is approximately 20 cm x 4 cm from each fin On a surface of each plate is a series of teeth that they are substantially triangular in cross-section and taper to a vertex with radius. The teeth in this mode are preferably 3 175 mm high, and are uniformly spaced with the center lines of the teeth separated by themselves at increments of 1 9 mm. "Toothed" side of a plate, one slotted slot (preferably three slots to build the mode shown in the Fi Figure 1) are cut, which are parallel to each other and perpendicular to the uniformly spaced teeth. These grooves correspond to the undeformed regions of the base material. The preferred base matepal is placed between the plates in a hydraulic press that has larger plates. that the plates to uniformly distribute the pressure The plates are compressed in such a way that the teeth only partially engage (or mesh). Preferably, the plates are moved in such a way that the teeth on the opposing plates are pressed towards each other at about 80% of the distance to the total coupling (the point where the teeth would otherwise touch) Typically, in order to do this, when the base material comprises a film laminate formed with openings and the material of the back sheet of polyethylene laminated together by adhesives that were described in conjunction with the embodiment shown in Figures 1 to 3, the plates will be compressed under a load of between about 1,750-4,900 g / cm2. The formed web material is then Removed from between the plates In the embodiment shown in Figures 1 to 3, the weft material formed is provided with approximately 75% extension capacity. The region of the tensionable network 74 comprises alternating ridges and valleys forming a plurality of axes. flexible flexing for the fins 24 This structure also provides the articulation 70 with a degree of extension capability The extension capability allows portions of the fins 24 within the articulation region 70 to expand slightly in the transverse direction to better bend around the curved sides of the crotch of the wearer's panties Providing the joint 70 forming the regions of the stretchable net in the sanitary napkin may also be preferred when it is desired to provide the formed regions with slightly greater integrity such that the flaps 24 will be less likely to fall excessively on joint 70 due to p first unformed regions or the less extensible bands 76 of the stretchable network that will serve as "beams" that will tend to provide the fins with slightly greater structural stiffness and better appearance The sanitary napkin also preferably has zones of extension capacity 72 to release the Efforts that develop on the fins when folded down and under the user's undergarment The terms "extension capacity zone" or "zone of differential extension capacity," as used herein, refer to a part of the sanitary napkin 20 which is capable of extending (and is preferably capable of extending to an amount greater than the surrounding portions of the sanitary napkin 20) The sanitary napkin 20 preferably has at least one zone of extension capacity 72 for each flap 24 , and more preferably has four zones of extension capacity 72 one in each quarter of the sanitary napkin 20 Since the zon of differential extension capacity 72 release the fin efforts, these can be referred to herein as a type of "stress-releasing means". The extension capacity zones 72 can be extendable in any desired direction, or in more than one direction. However, extension capacity zones 72 are preferably extensible mainly mainly outwardly in the transverse direction This is generally in the direction of the arrows shown in Figure 1 As used herein, "generally in the transverse direction" means that the extension capacity has a transverse component However, all of the extension does not need to be exactly parallel to the main transverse center line of the sanitary napkin. The extension capacity, however, is preferably more oriented in the transverse direction than in the longitudinal direction. can include any structure capable of extending in the trans direction versal (or in any other desired direction) The structures suitable for extension capacity zones are described in greater detail in U.S. Patent No. 5,389,094 issued to Lavash et al.

February 14, 1995 In the embodiment shown in Figure 1, the zones of extension capacity 72 can either comprise rolled regions with ring fins or a network of corrugations without any of the less extensible bands therein. In any case, the extension capacity zones 72 preferably have corrugations with shoulders 88 that are oriented generally in the longitudinal direction such that the extension capacity zones 72 will be mainly extensible in the transverse direction Preferably, as shown in Figure 1 , the joint 70 is contiguous (i.e., touching or connected along in an uninterrupted sequence) with the extension capacity zones 72 The articulation 70 and the preferred extension areas 72 rolled with ring are, in this way , parts of a region mixed continuous deformed As shown in Figure 1, the joint 70 gradually transits into portions of the sanitary napkin comprising the areas of extension capacity 72. The mixed deformed region, in this manner, comprises continuous corrugations having ridges that are generally oriented in the longitudinal direction with a plurality of less extensible bands 76 in the central region adjacent to the transverse center line of fin J, the pledge surface 20B of sanitary napkin 20 may include, and preferably includes, fasteners for securing 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 of the known types of undercarriage can be used. The technique such as adhesive fasteners and mechanical fasteners Adhesives comprising adhesive have been found to work well for this purpose, with pressure sensitive adhesives being preferred. In a preferred embodiment, the central pad holder 82 comprises a pair of longitudinally oriented spaced adhesive strips or areas that are centered around the adhesive. the longitudinal center line 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 the position afterwards. that they wrap around the edge of the crotch portion of the pantyhose. Suitable adhesive fasteners are described in greater detail in U.S. Patent No. 4,917,697. The fins 24 can be held in position by fastening the fins 24 to the undergarment, or to the opposite flap The fasteners used with the present invention are not limited to adhesive means of fixation Any type of fastener used in the Technique for this purpose For example, the sanitary napkin 20 can be secured to the user's undergarment by mechanical fasteners, such as VELCRO, or the fasteners described in U.S. Patent No. 4,946,527 entitled "Adhesive Pressure Sensitive Bracket". method for making the same "issued to Battrell on August 7, 1990, or in U.S. Patent No. 5,392,498 entitled" Beneficial non-abrasive mechanical clamping system with the skin "issued to Goulait, and others on February 28, 1990. 1995 However, for simplicity, the fasteners will be described in terms of adhesive fastening means. The adhesive fastening means are respectively covered by removable release liners, central pad release liners and fin release lining, both designated 86 Pressure sensitive adhesives should be covered with the release liner 86 to prevent the l The adhesives stick to foreign surfaces before use. Suitable release liners are described in U.S. Patent No. 4,917,697. A particularly preferred release liner which also serves as an individual package for wrapping the sanitary napkin is described in the US Pat. United States No. 4,556,146 issued to Swanson, and others. Many other modalities of sanitary napkin 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 shown in FIG. described herein for improved integrity and acquisition. General descriptions of mixed sanitary napkins are found in United States Patent No. 4,425,130 to Procter & Gamble entitled "Mixed sanitary towel" issued to DesMarais, and others on January 10, 1984, and in the mandatory registration of invention H161 entitled "Mixed health towel that fits the body", published in the name of Mayer, and others on 5 November 1996 To form the mixed sanitary napkin, a sanitary napkin such as that described here it can serve as the panty protector (or "base pad") and a tube of absorbent material wrapped by a top sheet (or "primary menstrual pad") can be placed on top of the sanitary napkin and attached to it at the ends The fusion bond on the base pad is preferably distributed in the same manner as shown in the drawings here. The fixing of the tube to the sanitary napkin is preferably achieved by melt-bonding the extensions of the upper sheet material at the ends. ends of the tube to the base pad In some preferred embodiments of said mixed sanitary napkin, there may also be attachment between the ends of the tube of the absorbent material and the base pad The tube of the mixed sanitary napkin may be attached to the base pad between its ends by any suitable fixing means, such as by adhesives. It is believed that the improved fixation between the top sheet and the acquisition component in the base pad may have a particular advantage within the context of a mixed sanitary napkin. Without wishing to be bound by any particular theory, it is believed that the improved affixation will result in a reduced tendency for the upper sheet to separate from the underlying components along the longitudinal side regions of the sanitary napkin This is believed to be particularly important in versions of a mixed sanitary napkin having fins The fusion bonding ensures that the part of the topsheet in the longitudinal side regions of the base pad will not move towards contact with the user's body This will reduce the tendency for the longitudinal side regions to be stained by menstruation, and menstruation instead will proceed directly to the absorbent tube. Other advantages are also possible from the union described here For example, when provided the sanitary pad with fins, the part of the upper sheet and the sheet post that are joined together to form the fins of the sanitary pad they can be substantially free of adhesive between the parts thereof to leave a "glue-free window" on a part of the fins. A suitable sanitary towel that can have a glue-free window on its fins is deciphered in the European patent application. No EP 0 695 542 A1 entitled "Absorbent article having side wrapping elements of the undergarment", published in the name of Coles, and others on February 7, 1996 In these embodiments, the top sheet and the back sheet are, without however, preferably joined together at least along the total perimeter of the fins and at any of the extendable portions of the fins. Providing a sanitary napkin having fins with a glue-free window has the advantage of providing fins with flexibility. Increased in the area of the glue-free window This is due to the absence of adhesive in this part of the fins and the fact that the parts of the The upper sheet and the rear sheet forming the fins can fold independently of one another in the glue-free window. One potential disadvantage of the glue-free window, however, is that the top sheet will tend to corrugate or " "bulging" and detaching from the backsheet, particularly when bending around the sides of the user's undergarment Without being bound by any particular theory, it is believed that the improved attachment described herein will better maintain the top sheet attached to an underlying component and reduces said bulging In this embodiment, and all of the other modalities described herein, it is believed that improved fixation between the topsheet and the underlying component or components will result in menstruation being better absorbed and concealed from view (or "masked") ), and will reduce the tendency for menstruation to escape from the upper sheet. In addition, it is also possible to form a sanitary napkin (or other item). absorbent) with a pattern of enhancements with the characteristics of the bonding areas in the sanitary towel described above. Such an absorbent article may be less preferred, but will provide the consumer with the benefits of increasing user safety in the softness, absorbency, and reduction in rewet associated with the absorbent article. The sanitary pad 20 of the present invention is utilized by removing the release liner 86 and placing the towel sanitary 20 in a pantyhose The main body portion 22 is placed in the crotch portion of the pantyhose with one end of the main body portion 22 extending toward the front section of the pantyhose and the other end toward the posterior section of the pantyhose The backsheet 40 is placed in contact with the inner surface of the center of the crotch portion of the panty. The central adhesive pad holder 82 holds the main body portion 22 in position. The distal portions of the wings 24 are bent around each other. the side edges of the pan The fin adhesives 84 ensure the fins 24 to the underside of the panty or to the opposite fin The disclosures of all patents, patent applications (and any of the patents issued thereon, as well as any of the corresponding published foreign patent applications), and the publications mentioned throughout this patent application are hereby incorporated by reference herein. It is not expressly admitted, however, that some of the documents incorporated by reference herein, teach or disclose the present invention. It is also not expressly admitted that any of the heretofore available materials or products described herein teach or disclose the present invention Although the particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention

Claims (1)

1. CLAIMS An absorbent article having a side that gives the body a bound region and an unrestricted window wherein a part of the absorbent article is below the bound region and said window without restriction, the absorbent article comprising a top sheet permeable to the absorbent article. liquid defining the side that gives the body of the absorbent article, a back sheet impervious to the liquid unit to the top sheet, and an underlying layer permeable to the liquid having a thickness, said underlying layer being placed between the top sheet and the back sheet, characterized in that the upper sheet is fused to the underlying layer in a plurality of individual joined areas that are located in the joined region, and said window without restriction on the side facing the body is substantially free of joined areas, and is surrounded by the united region, the joined areas having a circular shape seen in plan with a diameter of between approximately 1 m m and less than about 3 mm, and being distributed at a density of between about 20 to 80 joints per 9 cm2 The absorbent article according to claim 1, wherein the joined areas have outer edges, and the outer edges of the areas joined together are separated by more than about 0 5 mm apart 3 The absorbent article according to claim 1, having a longitudinal center line, where the window is centered without restriction around the longitudinal center line The absorbent article according to claim 1, wherein the window without restriction is surrounded by a closed geometric figure formed by a plurality of joints. The absorbent article according to claim 4, wherein the joints have a circular shape seen in the 6th floor The absorbent article according to claim 5, wherein the joints in the closed geometrical figure are arranged in a number of opposite, concave, inwardly oriented, curvilinear lines. The absorbent article according to claim 1, wherein the unrestricted window is surrounded by a plurality of spaced apart unions arranged in a cushioned pattern covering substantially all of said side facing the body of the absorbent article 8 The absorbent article according to claim 7, wherein the cushioned pattern comprises a plurality of joints arranged in a configuration of a diamond 9 The absorbent article according to claim 8, wherein a plurality of joints arranged in a rounded shape configuration is located within a plurality of joints that are arranged in a configuration of a diamond. according to claim 9, wherein said pattern of joints is a repetitive pattern 11 The absorbent article according to claim 1, wherein the joints comprise thermal and pressure joints 12 The absorbent article according to claim 1, wherein the joints comprise ultrasonic connections The absorbent article according to claim 1, wherein the supepor sheet comprises a thermoplastic film with openings 14 The absorbent article according to claim 13, wherein the underlying liquid-permeable layer comprises a spunbonded polypropylene nonwoven material The absorbent article according to claim 13, wherein the underlying layer permeable to the liquid comprises at least one layer of nonwoven material placed by air attached in a manifold manner. The absorbent article according to claim 13, wherein the layer the underlying comprises a laminate composed of non-woven polypropylene spunbonded material and a nonwoven material placed with air attached in a manifold manner. The absorbent article according to claim 15, further comprising an absorbent core positioned between the liquid-permeable layer and the post-vapor sheet wherein the absorbent core comprises at least one layer of non-woven material placed with multiply attached air. The absorbent article according to claim 15, in wherein the liquid permeable underlying layer comprises a nonwoven material placed with air attached with latex 19 The absorbent article according to claim 18, further comprising an absorbent core of felt of air positioned between the liquid permeable layer and the backsheet 20 A sanitary napkin having a side facing the body, a side facing the garment, and a longitudinal center line, said sanitary napkin comprising a top sheet permeable to the liquid of thermoplastic film with openings, a liquid-impermeable backsheet attached to the topsheet, a laminated acquisition component positioned between the topsheet and said backsheet, the acquisition component comprising a two-layer non-woven structure comprising a spunbonded polypropylene non-woven material close to the thermoplastic film and a non-woven air-laid non-woven matepal under the non-woven polypropylene material, wherein the apertured film and the acquisition laminate are joined together by a plurality of fusion joints, a core absorbent positioned between the top sheet and the acquisition component, said absorbent core comprising an air-laid non-woven material with multiple bonds comprising cellulose fibers, two-component fibers, a latex agglutinate, and a plurality of particles of superabsorbent forming material of hydrogel, where the side that gives The body of the sanitary napkin has a bound region and an unconstrained window wherein the supepor sheet is fused to the acquisition laminate in individual joined areas that are located in said joined region and said unrestricted sale is substantially free of joints, and is surrounded by said joined region, said joined areas having a circular shape seen in plan with a diameter between about 1 mm and less than about 3 mm, and being distributed at a density of between about 20 to 80 joints per 9 cm2 21 sanitary napkin having a side that gives the body, a side that gives the garment, and a longitudinal center line, said sanitary napkin comprising a top sheet permeable to the liquid of thermoplastic film with openings, a subsequent sheet impervious to the liquid attached to the top sheet, an acquisition component positioned between the top sheet and said back sheet, said acquisition component comprising a non-woven air-laid matepal, bonded with latex, and an air felt absorbent core positioned between the acquisition component and the backsheet, wherein the side facing the body of the sanitary napkin has a bound region and an unrestricted window wherein the top sheet is fused to the acquisition component in individual joined areas that are located in said joined region and said sale without restriction is substantially junction-free, and is surrounded by said bound region, said joined areas having a circular shape seen in plan with a diameter of between about 1 mm and less than about 3 mm, and being distributed in a density of between about 20 to 80 joints per 9 cm2 22 An absorbent article that has a side that gives the body an enhanced region and a sale un-enhanced, said absorbent article comprising a fluid-permeable upper sheet defining said side that gives the body of the absorbent article, a back sheet impervious to the liquid attached to the top sheet, and an absorbent core placed between the top sheet and the back sheet , wherein the top sheet is enhanced with a plurality of raised areas that are located in said raised region, and said un-enhanced window on the side that gives the body substantially free of raised areas, and is surrounded by the raised region, said areas embossed having a circular shape seen in plan with a diameter of between about 1 mm and less than about 3 mm, and being distributed in a density of between about 20 to 80 embossments per 9 cm2