MXPA06011314A - Dual cuff for a unitary disposable absorbent article made of a continuous cuff material - Google Patents

Abstract

an absorbent core having a garment surface and a body surface, a liquid permeable topsheet positioned adjacent said body surface of said absorbent core, a liquid impermeable backsheet positioned adjacent said garment surface of said absorbent core and an elastically contractible dual cuff. The dual cuff has a proximate end and a distal end. The dual cuff is joined to the article by a cuff bond. The dual cuff has a first cuff and a second cuff. The first cuff is disposed between the proximate end and the cuff bond. The second cuff is disposed between the cuff bond and the distal end. The dual cuff is constructed of a continuous cuff material and enclosed by the cuff bond. It may be desirable for the cuff material to only be bonded to itself by the cuff bond.

Description

DOUBLE DOUBLE FOR A UNITARY DISPOSABLE ABSORBENT ARTICLE ELABORATED FROM A CONTINUOUS DOUBLE MATERIAL FIELD OF THE INVENTION The present invention relates to double folds in absorbent articles, more particularly it refers to double folds having a first and a second fold over disposable absorbent articles such as diapers.

BACKGROUND OF THE INVENTION The main function of absorbent articles such as disposable diapers and incontinence pants for adults is to absorb and contain body exudates. Therefore, these items have been designed to prevent body exudates from soiling, wetting or in any other way containing clothing or other items such as bedding that come into contact with the user. A common failure in these products occurs when body exudates escape through the interstices between the article and the user's leg to the adjacent clothes because they are not immediately absorbed by the item. Urine, for example, tends to seep through the upper canvas towards the edges of the absorbent article where it may come into contact with clothing or other items. Additionally, the absorbent article does not absorb the loose fecal material well and it tends to "float" on the collecting surface of the liquid until finally filtering through the legs of the user. Contemporary absorbent articles have a top canvas, a bottom canvas, an absorbent core, a barrier fold and a containment fold. The containment fold is generally efficient to prevent filtration and overflow of the fluid loaded article to the clothing that is in contact with the edges of the article since said containment fold contains a liquid impervious barrier between the edge of the article and The clothing in contact with the and also offers a containment action around the legs of a user. The barrier fold is generally used to prevent loose fecal mastiere and urine or fluid discharges from soiling the user's clothing. The barrier folds inhibit the free flow of this material and provide a structure to retain the material within the article. While providing an absorbent article with an internal and external fold has its advantages, the article will usually be too wide in the crotch area and inconvenience its user. Additionally, the outer fold generally has an unfinished appearance that adds to the perceived discomfort experienced by the user. Therefore, it is necessary to provide an efficient and comfortable absorbent article in the region of the fold.

BRIEF DESCRIPTION OF THE INVENTION A disposable absorbent article that includes: an absorbent core with a garment surface and a body surface, a liquid permeable upper canvas adjacent said body surface of said absorbent core, a canvas The liquid impervious bottom adjacent to said garment surface of said absorbent core and a double elastically shrinkable fold. The dual fold has a near edge and a distant edge. The double fold is attached to the article by means of a bending joint. The double fold has a first fold and a second fold. The first fold is placed between the proximal edge and the fold joint. The second fold is placed between the junction of the fold and the distal end. The double fold is formed by a continuous bending material inside a fold joint. It may be desired that the bending material binds itself by joining the fold. The first fold encloses at least one elastic partner operaiivamentemenie to the first fold, securing it with an element of elastic union. The elastics is secured to the first bend near its ends or along its entire length. The second fold encloses to the rtienos an elastic associated operatively to the second fold securing it with a elastic connection element. The Elastic is secured to the second bend near its exfers or along its length. The absorbent article can be a disposable diaper. The absorbent article can be a previously adjusted diaper.

BRIEF DESCRIPTION OF THE FIGURES Although the specification concludes with the claims that particularly state and clearly claim the invention, it is believed that the present invention will be better understood from the following drawings when considered together with the accompanying description, in which like components are designated with the same reference number. Figure 1 is a plan view of one embodiment of disposable diapers of the present invention in which portions have been cut to expose the underlying structure. Figure 2 is a cross-sectional view taken along line 2-2 of Figure 1; Figure 3a is a top view taken within the encircled portion 3 of Figure 1 illustrating an example of the previous industry of a double fold within the crotch region; Figure 3b is a cross-sectional view of Figure 3a; Figure 4a is a top view taken within the encircled portion 3 of Figure 1 illustrating a double-fold absorbent article in accordance with the present invention, within the crotch region; Figure 4b is a cross-sectional view of Figure 4a; Figure 5 is a fragmentary cross-sectional view taken along the line 5-5 of Figure 1; Figure 6 is a fragmented transverse view of another embodiment taken along line 2-2 of Figure 1; Figure 7 is a fragmentary cross-sectional view of another embodiment taken along line 2-2 of Figure 1; Figure 8 is a fragmentary cross-sectional view of another embodiment taken along line 2-2 of Figure 1; Figure 9 is a fragmentary cross-sectional view of another waveform along the line 2-2 of Figure 1; Figure 10a is a close-up view taken within the encircled portion 10 of Figure 2 illustrating a folding technique of the bending material wherein one end of the lower bending material is positioned longitudinally outside the fold joint; and Figure 10b is a close-up view taken within the encircled portion 10 of Figure 2 illustrating a bend technique of bending material, wherein the end of the lower bending material is longitudinally placed inside the joint of the bending material. fold.

DETAILED DESCRIPTION OF THE INVENTION As used herein, the following terms have the following meanings: "Absorbent article" refers to devices that absorb and contain liquids and more specifically, refers to devices that are placed against or in proximity to the user's body to absorb and contain liquid exudates discharged from the body. "Longitudinal" is an address that is parallel to the maximum linear dimension of the article and includes the directions within ± 45 ° of the longitudinal direction. The "lateral" or "transverse" direction is orthogonal to the longitudinal direction. The "Z direction" is orthogonal to both longitudinal and transverse directions. The "x-y plane" refers to the plane congruent with the longitudinal directions as transverse. The term "disposable" in this document is used to describe absorbent articles that are not generally intended to be washed or otherwise restored or reused, such as absorbent articles (that is, they are intended to be disposed of after a single use and preferably recycled). , to convert them into a composition in a different way, to dispose of them in a comparative way with the environment). As used in this document, the term "arranged" is used to imply that an element is formed (joined and placed) in a particular place or position as a unitary structure with other elements or as a separate element attached to another element.

As used herein, the term "attached" encompasses configurations by means of which one element is directly secured to another element by fixing the element directly to the other element and configurations by means of which one element is indirectly secured to another element by fixing the element to intermediate members who in turn are fixed to another element. A "unitary" absorbent article refers to absorbent articles that are formed of separate parts joined together to form an attached enamel so that they do not require separate handling parts, as a separate fastener and liner. As used in the present, the term "diaper" refers to an absorbent article that is usually used by infants and incontinent people around the lower torso. The terms "water-permeable" and "water-impermeable" refer to the penetrability of matls in the context of the use to which disposable absorbent articles are put. Specifically, the term "water permeable" refers to a layer or layered structure that fills pores, openings and / or interconnected voids that allow liquid water to pass through its thickness in the absence of a pressing force. In contrast, the term "water impermeable" refers to a layer or a layered structure through which thickness liquid water can not pass in the absence of a pressing force. A layer or layered structure that is impermeable to water according to this definition may be permeable to water vapor, that is, it may be "vapor permeable". As is known in the industry, a common method for measuring the water permeability of the matls commonly used in absorbent articles is a hydrostatic pressure test, also called a hydrostatic head test or simply a "hydro head" test. Compendiums of suitable methods well known for the hydrostatic pressure test are approved by INDA (formerly International Nonwovens and Disposable Association, now The Association of the Nonwoven Fabrics Industry) and EDANA (European Disposables And Nonwovens Association). The terms "proximal" and "disal" refer particularly to the location of an element either near or far from the center of a structure, for example, the proximal edge of a longitudinally extending element is placed closer to the longitudinal axis of a structure. what is the distal axis of the same element with respect to the same long axis. As used in the present case, the term "barrier fold" refers to an elasticized flap that practically rests in a vertical position, more preferably inward towards the longitudinal center line, in the region of the crotch. Generally, said barrier fold encloses / contains at least one elastic that is concentrated mainly on the opposite ends of the diaper (for example, the technique of pulling the elastics for a better fit). As used herein, the term "containment bend" refers to an elasticized flap that is not maintained in a fully vertical position, more preferably outward toward the longitudinal edges of the diaper within the crotch region. In general, said containment fold surrounds / contains at least one elastic which is connected to the diaper practically along its length (by multiple unions along the elastic to create collecting regions). Figure 1 is a plan view of a non-limiting example of the general representation of a diaper 20 of the present invention in its flat, un-contracted state (ie, without induced elastic contraction) with parts of the structure that have been cut out for show more clearly the underlying structure of the diaper 20 and with the portion of the diaper 20 that remains in contact with the wearer facing the viewer. The diaper 20 includes a longitudinal axis 1000 and a transverse axis 1100. An annular portion 36 of the diaper 20 is configured as a first cinientation region 36 of the diaper 20. The opposite end portion 38 is configured as a back region of the waist 38 of the diaper 20. An intermediate portion 37 of diaper 20 is configured as a crotch region 37, extending longitudinally between the first and second region of waist 36 and 38. The waist areas 36 and 38 usually contain these portions of the diaper 20 that when worn surround the wearer's waist. The waist regions 36 and 38 may include elastic elements so that they are attached around the wearer's waist to improve fit and containment. The crotch region 37 is that portion of the diaper 20 that when the diaper is in use is usually placed between the legs of the wearer. The outer periphery of the diaper 20 is defined by the longitudinal edges 14 and the outer edges 10, 12 which are located along the first and second waist region 36, 38, respectively. The chassis 22 of the diaper 20 comprises the main body of the diaper 20. The chassis 22 comprises an outer wrap that includes a liquid-permeable top sheet 24 and / or a bottom sheet 26 (see Figure 2) impervious to liquids and, thus less, a portion of an absorbent core 28 enclosed between the upper canvas 24 and the lower canvas 28. For the unitary absorbent articles, the frame 22 comprises the main structure of the diaper having other added features to form the composite structure of the diaper. Although the upper web 24, the lower web 26 and the absorbent core 28 can be assembled in a variety of well-known configurations, the preferred diaper configurations are generally described in US Pat. 3,860,003 under the title "Absorbent Article With Multiple Zone Structural Elastic-LIke Film Web Extensible Waist Feature" (Collapsible side portions for disposable diapers) awarded to Kenneth B. Buell on January 14, 1975; U.S. patent no. 5,151, 092 issued to Buell on September 9, 1992; US Patent no. 5,221,274 issued to Buell on June 22, 1993; and from the USA no. 5,554,145 under the title "Absorbent Article With Multiple Zone Structural Elastic-Like Film Web Extensible Waist Feature" (Absorbent article with characteristics of elastic kinematics of the ipod film, ellipsic film with multiple zones) given to Roe et al. on September 10, 1996; U.S. patent no. 5,569,234 under the title "Disposable Pull-On Pant" awarded to Buell et al. on October 29, 1996; U.S. patent no. 5,580,411 entitled "Zero Scrap Method for Manufacturing Side Panels for Absorbent Articles" (granted to Nease et al. on December 3, 1996; and U.S. patent no. 6,004,306 with the title "Absorbent Article With Multi-Directional Extensible Side Panels" (Absorbing article with extensible mulfidirectional side panels) granted to Robles et al. on December 21, 1999; each of which is incorporated herein by reference. The upper web 24 may be fully or partially elastic or may be gathered to form a hollow space between the upper web 24 and the core 28. Illustrative structures that include stretchy or stretched upper webs are described in greater detail in US Pat. .US. no. 4,892,536 issued to DesMarais et al. on January 9, 1990 with the title "Absorbení Artícle Having Elastic Strands" (Article absorbent with elastic bands) no. 4,990,147 granted to Freeland on February 5, 1991 with the title "Absorbent Article With Elastic Liner For Waste Malarial Isolation" (absorbent article with elastic lining to isolate waste materials); no. 5,037,416 issued to Alien et al. on August 6, 1991 under the title "Disposable Absorbent Article Having Elastically Extensible Topsheet" (Disposable absorbent article with an elastically extensible top sheet); and No. 5,269,775 issued to Freeland et al. on December 14, 1993 with the title "Trisection Topsheets for Disposable Absorbent Articles and Disposable Absorbent Articles Having Such Trisection Topsheets" (Upper sheets with three sections for disposable absorbent articles and absorbent articles with upper three-section canvases); each of which is incorporated herein by reference. The absorbent core 28 may comprise any absorbent material that is generally compressible, conformable, does not irritate the wearer's skin and is capable of absorbing and retaining liquids such as urine and other certain body exudates. The absorbent core 28 may contain a wide range of liquid absorbent materials commonly used in disposable diapers and other absorbent articles, such as crushed wood pulp, which is generally referred to as air felt. Examples of other suitable absorbent materials include creped cellulose wadding; meltblown polymers, including coform polymers; chemically modified, rigidified or crosslinked cellulosic fibers; tissue paper, including compressible laminates or tissue paper laminates; absorbent foams; absorbent sponges; superabsorbent polymers; absorbent gelling materials; or any other material or combination of known absorbent materials. Illustrative absorbent structures for use as absorbent devices are described in U.S. Pat. no. 4,610,678 titled "High-Density Absorbent Structures" (High Density Absorbing Structures) granted to Weisman et al. on September 9, 1986, no. 4,673,402 entitled "Absorbent Articles With Dual-Layered Cores" (Absorbent articles with double layer cores) given to Weisman et al. on June 16, 1987; no. 4,834,735 entitled "High Density Absorbing Members Having Lower Density and Lower Basis Weight Acquisition Zones" (Absorbent elements with areas of lower density and lower basis weight) given to Alemany et al. on May 30, 1989; no. 4, 888, 231 entitled "Absorbent Core Having A Dusting Layer" (granted to Angstadí on December 19, 1989; no. 5,137,537 entitled "Absorbent Structure Containing Individuallzed, Polycarboxylic Acid Crosslinked Wood Pulp Cellulose Fibers" (Absorbent structure containing individual cross-linked wood pulp cellulosic fibers of polycarboxylic acid) given to Herron et al. on August 11, 1992, no. 5,147,345 tiíulada "High Efficiency Absorbení Articles For Inconíinence Management." (High efficiency absorbent articles for incontinence) granted to Young et al. on September 15, 1992; no. 5,342,338 entitled "Disposable Absorbent Artcle For Low-Viscosity Fecal Maerial" (Disposable absorbent article for low viscosity stools) granted to Roe on August 30, 1994; no. 5,260,345 entitled "Absorbent Foam Materials For Aqueous Body Fluids and Absorbent Articles Containing Such Materials" (Absorbent sponge materials for containing aqueous body fluids and absorbent articles containing these materials) given to DesMarais et al. on November 9, 1993; no. 5,387,207 tiíulada "Thin-Unil-Weí Absorbení Foam Materials For Aqueous Body Fluids And Process For Making Same "(Absorbent spongy materials that are kept thin until wet, which are used to contain aqueous body fluids and their processing process) granted to Dyer et al on February 7, 1995; No. 5,397,316 entitled "Slitted Absorbent Members For Aqueous Body Fluids Formed Of Expandable Absorbeni Materials" (Absorbents with slits for aqueous body fluids made with expandable absorbent materials) granted to LaVon et al on March 14, 1995, and No. 5,625,222 entitled "Absorbent Foam Materials For Aqueous Fluids Made From High Internal Phase Emulsifiers Having Very High Water-To-Oil Ratios "(Absorbent sponge materials for aqueous fluids made from high-phase emulsions with very high water / oil ratios) awarded to DesMarais and Col. on July 22, 1997. These patents are hereby incorporated by reference, the bottom sheet 26 being in general the portion of the diaper 20 which is located adjacent to the surface of the absorbent core 28 facing the garment and prevents the excretions absorbed and contained therein from soiling the articles that may be in contact with the diaper 20, such as, for example, the clothes of bed and underwear. In the preferred embodiments, the bottom sheet 26 is substantially impermeable to liquids (eg urine) and comprises a laminate of a non-woven material and a thin plastic film such as a thermoplastic film with a thickness of between 0.012 mm (0.5 thousand) to approximately 0.051 mm (2.0 mils). Suitable lower canvas films include those manufactured by Tredegar Industries Inc. of Terre Haute, IN and marketed under the names of X15306, X10962 and X10964. Other suitable bottom sheet materials may include permeable materials that allow leakage of the diaper vapors 20 and at the same time prevent excretion from passing through the bottom sheet 26. Illustrative permeable materials may include materials such as woven cloth and fabric webs non-woven, composite materials, such as non-woven fabric webs with a coating film, and microporous films such as those manufactured by Mitsui Toatsu Co. of Japan under the name of ESPOIR NO and by EXXON Chemical Co. of Bay City, TX with the name of EXXAIRE. Suitable permeable composites comprising polymer blends are distributed by Clopay Corporation of Cincinnati, OH under the trademark HYTREL mixes P 18-3097. These permeable composite materials are described in greater detail in PCT application no. WO 95/16746 published June 22, 1995 in the name of E. I. Dupont and in the U.S. patent application. copendiente serial number 08 / 744,487 filed on November 6, 1996 in the name of Curro. Other permeable lower canvases that include nonwoven fabric webs and films formed with holes are described in U.S. Pat. no. 5,571,096 issued to Dobrin et al. on November 5, 1996. A suitable exemplary underpanse is disclosed in U.S. Pat. no. 6,107,537 entitled "Disposable absorbent articles providing a skin condition benefit" (Disposable absorbent articles that provide a beneficial condition to the skin) issued to Eider et al. on August 22, 2000. Other suitable materials and / or manufacturing techniques may be used to supply a lower canvas 26 that includes surface trawls, specific processes and selection of filaments and processes, etc., but is not limited thereto. Each of these references is hereby incorporated by reference herein. The lower canvas 26 may also consist of more than one layer, as shown, for example, in FIG. 1, wherein the lower layer 26 of the lower canvas (often referred to as the lower canvas) may be made of a soft non-woven material and a lower sheet 27 of the lower canvas may be made of a substantially impermeable film. Adhesive 29, or any other material or mixture, can be used to join layers 26 and 27. While various interior canvas configurations are considered here, it would be obvious to those with knowledge in the industry that various other changes and modifications can be made without get away from the spirit and scope of the invention. The diaper 20 may also include a fastening system 55. The fastening system 55 preferably maintains the first waist region 36 and the second waist region 38 in a configuration such that lateral stresses are provided around the circumference of the diaper 20 to secure it. to the user's body. The fastener system 55 preferably comprises a fastener which may be in the form of a tape tab, fastening components of hook and eye fasteners, interlocking fasteners, such as clips and slots, buckles, buttons, snaps and / or male fastening components. female, although any other known means of attachment is generally acceptable. Some illustrative surface fastening systems are described in U.S. Pat. no. 3,848,594 entitled "Tape Fastening System for Disposable Diaper" granted to Buell on November 19, 1974; no. B1 4,662,875 entitled "Absorbent Article" issued to Hirotsu et al. on May 5, 1987; no. 4,846,815 typified "Disposable Diaper Having An Improved Fastening Device "issued to Scripps on July 11, 1989; No. 4,894,060 entitled" Disposable Diaper With Improved Hook Fastener Portion "granted to Nestegard on January 16, 1990; No. 4,946,527 entitled" Pressure-Sensitive Adhesive Fastener And Method of Making Same "issued to Battrell on August 7, 1990 and the US patents cited above, No. 5,151, 092 issued to Buell on September 9, 1992; 5,221,274 issued to Buell on June 22, 1993. An illustrative fastening system by interlacing is presented in co-pending U.S. Patent Application No. 6,432,098 entitled "Absorbent Article Fastening Device" issued to Kline et al. August 13, 2002. The fastening system 55 may also provide a means of maintaining the article in a configuration as described in US Patent No. 4,963,140 issued to Robertson et al on October 16, 1990. AND The fastening system can also include primary and secondary fastening systems, as described in U.S. Pat. no. 4,699,622 entitled "Disposable Diaper Having An Improved Side Closure" issued to Toussant et al. on October 13, 1987, to reduce the displacement of the overlapping portions or to improve the adjustment as described in the United States patents. no. 5,242,436 entitled "Absorbení Article With Fasíening System Providing Dynamic Elasticized Waisíband Fit" granted to Weil et al. on September 7, 1993; no. 5,499,978 entitled "Absorbent Arricie Wlth Dynamic Elastic Waist Feature Having A Predisposed Resilient Flexural Hinge" awarded to Buell et al. on March 19, 1996; no. 5,507,736 entitled "Absorbent Article With Dynamic Elastic Waist Feature Comprising An Expansive Tummy Panel" issued to Clear et al. on April 16, 1996; no. 5,591,152 entitled "Absorbent Article With Dynamic Elastic Waist Feature Having A Predisposed Resilient Flexural Hinge" granted to Buell et al. on January 7, 1997. Each one of the countries and the co-pending application are incorporated herein by reference. In alternative embodiments, the article may be preformed by the manufacturer to create a pant. The term "underpants" emblazoned here, refers to disposable garments that have an opening in the belt and leg openings designed for adults or children. A brief may be placed in its position on the wearer by inserting the legs thereof into the leg openings and sliding the briefs into position around the lower torso of the wearer. A pant may be preformed by any suitable technique, including, but not limited to, joining parts of the article using reajusfable and / or non-adjustable joints (eg seam, weld, adhesive or cohesive bond, fastener, eic) . While the term "calzón" is used here, calzones are also commonly referred to as "closed diapers," "pre-insured diapers," "easy-to-wear diapers," "training pants," and "diapers-pants." The appropriate pants are disclosed in the USA. no. 5,246,433, issued to Hasse, et al. September 21, 1993; U.S. patent no. 5,569,234, issued to Buell et al. on October 29, 1996; US Patent no. 6,120,487, granted to Ashíon on September 19, 2000; and U.S. patent no. 6,120,489, issued to Johnson et al. on September 19 2000; the U.S. patent no. 4,940,464 issued to Van Gompel et al. on July 10, 1990; U.S. patent no. 5,092,861, issued to Nomura et al. on March 3, 1992; application no. of series 10/171, 249, denominated "Highiy Flexible And Low Deformation Fastening Device (Device of subjection of low deformation and altameníe flexible)", filed the 13 of June of 2002; United States no. 5,897,545, issued to Kline et al. on April 27, 1999; U.S. patent no. 5,957,908, issued to Kline et al. On September 28, 1999, the inclusion of each of them is incorporated here as a reference. The diaper 20 may also include other features such as those known in the industry, including folds, front and back panels, waistband features, elastics, and the like to provide improved skeletal, fit and containment characteristics. These additional features are well known in the industry and are described in the patents of the USA no. 3,860,003 and no. 5,151, 092, which are incorporated in this document as reference. For example, the diaper 20 may include barrier folds or "vertical" elasticated fins as illustrated in U.S. Pat. 4,808,178 and 4,909,803 granted to Aziz et al. on February 28, 1989 and March 20 , 1990, respectively. Additionally, the diaper 20 may include elasticized layered aleias of containment folds or "leg cuffs" as illustrated in the patent of the United States no. 3,860,003. It is possible to provide a first and a second double fold fold as illustrated in United States Patent Nos. 4,695,278 and 4,795,454 granted to Lawson on September 22, 1987 and to Dragoo on January 3, 1989, respectively. Figure 2 is a fagmented cross-sectional view taken along line 2-2 of the Figure and describes the construction of a diaper in the crotch region 37 of the diaper 20 while forming an anis to apply it to a user (e.g. , the diaper is exposed to elastic contraction). The double fold 30 has a proximal end 35, a distal end 39 and regions therein idenified as first fold 40 and second fold 50. The double fold 30 can be made from a continuous bending material 33 which practically envelops the elastic of the first fold 40 and the second bend 50. More especially, the first bend 40 has at least one elastic (although two elastic bands 42 and 44 are shown) and a second bend 50 which also has at least one elastic (although two elastics 52 and 54 are shown wrapped in the bending material 33. In this way, only one bending material 33 is used and manipulated during the construction of the double bend 30, thus facilitating the creation thereof. Additionally, the bending material 33 can be wrapped / joined in a single location, as illustrated by the joining of the fold 70, to be able to coat the elastics 42, 44, 52 and 54, thereby providing improved barrier properties by minimizing the amount from places where liquid leaks can occur (for example, at the binding sites). In this document, "conjoint bending material" refers to a continuous bending material along a path that begins at the juncture of the bending exile, conjoining along the bending material and ending at the junction of the bending exile. same fold as the double fold 30 is built practically from two layers of materials that can be the same material or different materials. By way of example, the continuous bending material 33 can be constructed from a less water-permeable material (e.g., a low-cost spunbond material) with a material with greater water permeability (e.g., a further material). melt-blown economical) that is placed inside the material less permeable to water. In another example, the bending material 33 can be made from melt-blown spunbond sheets. In yet another example, the bending material 33 can be made from a series of various materials as long as they are conical. In another example, it is possible to bring the bending material 33 to increase its hydrophobicity. Some hydrophobic systems include, but are not limited to, the application of a hydrophobic surface coating (as described in the United States patent application, serial number 60 / 543,785, "Hydrophobic Surface Coated Absorbent Articles And Associated Meyhods"). "(Absorbenite articles with hydrophobic surface coating and associated methods) filed on February 11, 2004) and fluoride treatment (as described in the United States patent application serial number 10 / 703,239," Disposable Absorbeni " Wiíh Masking Topsheeí "(Disposable absorbent articles with masking canvas), presented on November 7, 2003). In another example, it may be desired that the double fold 30 be connected to the diaper 20 in the form of a single joint (eg, adhesive, ultrasonic; for example, joining the fold 70 to the upper canvas 24). The union of the fold 70 can extend along the length of the diaper 20 practically. The attachment of the fold 70 can be adhesive, ultrasonic, compression, thermal, combinations of these, or it can be done by any other known means of bonding. the technique that is suitable for the specific materials used. The join of the fold 70 can also join the double fold 30 to the upper canvas 24. Finally, an adhesive 76 with liquid impermeability properties can be applied between the upper canvas 24 and the lower canvas 26 (or as will be illustrated in greater detail in FIG. present, the inner layer of the lower panel 27) to provide improved barrier properties. The adhesive 76 may overlap the intermediate joint 70; however, as long as the adhesive 76 helps contain exudates, their current locations may vary. Furthermore, it is preferred that the bending material is bonded to itself by means of the bending joint (that is, no other joint similar to the bending 70 connection is used). Finally, it is preferable that the first bend 40 and the second bend 50 are barrier bends. The elastics 42, 44, 52 and 54 can be operatively associated with their respective folds by securing them in the fold with an elastic fastening element 46. Said elastic fastening element 46 should be sufficiently flexible and adhesive to hold the elastics 42, 44, 52 and 54 in his state of mind. The elastics 42, 44, 52, and 54, which include a first and a second exíremo, can be attached to their respective folds only near their exits or along their length. The elastic fastening element 46 can be glue globules made from self-fusible adhesive such as that marketed by Findley Adhesives Incorporaed, Elmgrove, Wis., Under the name of Findley stickers 581. Alternatively, the elastic fastener 46 may be in the form of an ultrasonic joint or heat / pressure seal. A more detailed description of how the elastic fastener 46 can be located and secured to its corresponding fold is described in U.S. Pat. 4,081, 301, granted to Buell on March 28, 1978, and on the US Patent. no. 4,253,461, issued to Sírickland and Visscher on March 3, 1981, both incorporated herein by reference. While the elastics 42 and 44 are illustrated in the first fold 40 and the elastics 52 and 54 in the second fold 50, it will be obvious to any expert in the industry that it is possible to use one or more elastics in each fold without departing from the spirit and scope of the present invention. The elastics 42, 44, 52 and 54 suitable for use in the present invention are elastic strands with a cross section of 0.18 mm by 1.5 mm made from natural rubber available from Easthampton Rubber Company of Stewart, Va., Under the trademark L-1900 Rubber Compound. Other suitable elastics can be made from natural rubber, such as an elastic band sold under the trademark of Fulflex 9411 by Fulflex Company of Middletown, RI The elastics 42, 44, 52 and 54 can also comprise any heat-shrinkable elastic material well known in the art. indusiria Other suitable materials may include a variety of maferials such as those known in the industry to include elastomeric films, polyurethane films, elastomeric foams, formed elastic fabrics and synilel elasomers (for example, Lycra ™).

In addition, the elastics 42, 44, 52 and 54 can have different configurations. The width, for example, can be varied; it is possible to use a single strand or several parallel or non-parallel strands of elastic material; or it is possible to use a variety of shapes, including rectilinear and curvilinear. Referring now to Figure 3a, a top view denoted by the surrounding position 3 of Figure 1 is illustrated which shows an example of double bending of the lower anion 130 of the region of the crotch 37. Figure 3b describes a visfa in transverse section of Figure 3a. The double fold of the prior industry 130 is made from at least two bending materials 133 joined by means of the joints 160, 170 and 175. The double fold of the aniorior 130 is a proximal excercise. 135, a distal excrement 139 and intermediate ridges idenified as first fold 140 and second fold 150. More specifically, the first fold 140 has two elastics 142 and 144 and the second fold 150 also has two elastics 152 and 154 coated by the fold materials 133. When measuring the total width of the absorbent article 20, the widths of the double bending elements and the distances between each element must be considered. For example, with reference to Figure 3a, the distance "a" is the length measured from the longitudinal edge 128 to the distal edge of the fold 139a. As a background of the invention, near the end of the manufacturing process, a notched lateral cut is made in the lower canvas so as to create an hourglass shape to provide openings for the legs within the crotch region. When opening said cut, it is important that the rotating knife does not extend inadvertently towards the dlstal end of the fold 139a; in any other way, a perforated piece can later be removed by the user (for example, a baby) thus generating a risk to the safety of the child who may end up swallowing said piece. Therefore, the distance "a" is a safety norm that avoids this poiencial problem.

Based on the inaccuracies of the iris of a weft material that is fed to a rotating knife during the manufacture of an absorbent article, the distance "a" is common to approximately 7 mm. The distance "b" is the length measured from the dlstal edge of the fold 139a to the distal edge of the fold 139b. More specifically, since the double fold of the prior industry 130 is made from two bending materials 133 joined by a bending fold 160, problems of misalignment may arise by placing the edges 139a and 139b one next to the edge. oíro. The dissipation "b" is an inherent property of this double-fold design of the previous industry and is generally measured at approximately 2 mm. The distance "c" is the length measured from the distal edge of the fold 139b to the junction of the end of the bend 160. More specifically, the junction of the end of the bend 160 is intended to join the distal edges of the fold 139a and 139b. To ensure that the distal edges of the fold 139a, 139b are joined in a joint cylinder and on the basis of the inaccuracies of the path of a web of material that is fed to the joint cylinder during the manufacture of an absorbent article, the dissipation "c "It is usually estimated at approximately 3 mm. The distance "d" is the actual width of the joint at the end of the bend 160. Although the widths of the elastics 142, 144, 152 and 154 are comparatively irrelevant, the width of the joint at the end of the bend is important and therefore Overall, it is measured at 2 mm. The distance "d" is an inherent property of the double-fold design of the previous industry. The distance "e" is the length measured from the union of the end of the bend 160 to the elastic second of the fold 152. To ensure that the elastic of the second bend 152 does not attach to the joint of the end of the fold 160 and in base To the inaccuracies of the void of the weft of material that is fed to a joint cylinder during the manufacture of an absorbent article, the distance "e" is generally set to approximately 3 mm. The distance "f" is the length measured from the elastic of the second fold 152 to the elastic of the second fold 154. Both of the elastics 152, 154 are applied together with the adhesive to the textile web of the maferial. In case the elastics 152 and 154 with adhesive (not illustrated) come into contact with each other, they may unintentionally join in which case the manufacturing process should be interrupted and the problem solved. Due to the dramatic impact that the interruption of the process could produce, the distance "f" is set to 5 mm for safety reasons. Said distance is also important for the proper functioning of the second fold. The distance "g" is the length measured from an elastic of the second fold 154 to the intermediate joint of the fold 170. More specifically, the intermediate joint of the fold 170 is used to join the double fold 130 to the upper canvas (see Figure 2). To ensure that the elastics of the second fold 154 are not inadvertently attached to the intermediate joint of the fold 170, and on the basis of the inaccuracies of the path of the weft of the material that is fed to a roll and joint during manufacture of an absorbent article , the distance "g" is generally set to approximately 3 mm. Accordingly, the sum of said widths for double bend 130 is equal to 25 mm. Then, we recognize that there are two double folds 130 per absorbent article (ie, one on each side), the two double folds 130 representing 50 mm of the general width of said article. Finally, we assume a common distance between said double bends of 115 mm. In this way, the general width of the absorbent article of the anterior industry of the crotch region is equal to 165 mm. With reference to Figure 4a, this illustrates a top view taken within the enclosed portion 3 of Figure 1 showing a double fold 30 within the crotch region in accordance with the present invention. Figure 4b describes a cross-section visia of Figure 4a. The double fold 30 is made from a continuous bending material 33 poured by a fold connection 70. The double bend 30 has a proximal end 35, a distal end 39 and intermediate regions identified as first fold 40 and second fold 50. More specifically, the first bend 40 has at least one elastic (although two elastic bands 42 and 44 are illustrated) and the second bend 50 also has at least one elastic (although two elastic ones 52 and 54 are illustrated) contained within Material of the fold 33. When comparing the general width of the absorbent article in Figure 4a (present invention) with Figure 3a (earlier industry), a similar analysis is performed. For example, with reference to Figure 4a, the dissipation "a" is practically the same as that given in Figure 3a; However, the distance is measured from the longitudinal axis 28 to the distal edge of the fold 39 (compared to Figure 139a). Since there are the same safety and manufacturing considerations, the distance "a" is generally set to 7 mm. The gap "b" (measured in Figure 3a as the distance from the distal edge of the fold 139a to the distal edge of the fold 139b) does not exist in Figure 4a because a continuous bend material 33 is folded to create an edge dissimilar to the fold 39, instead of two overlapping and joined bending materials. Therefore, distance "b" is irrelevant. The distance "c" (measured in Figure 3a as the distance that exists from the distal edge of the fold 139b to the junction of the end of the bend 160) does not exist in Figure 4a because the folded continuous bend material 33 does not need to be bonded so next to the dissimilar edge of the fold 139. Therefore, the dissi- tancy "c" is irrelevant. The dissipation "d" (measured in Figure 3a as the actual width of the junction of the eximetry of the bend 160) does not exist in Figure 4a because no junction near the distal end of the bend 39 is required. Therefore, the distance " d "is irrelevant. The distance "e" is practically the same measurement as that given in Figure 3a; however, the length is measured from the distal end of the fold 39 (as compared to the junction of the end of the bend 160) to the elastic of the second bend 52. Since the disial edge of the fold 39 is folded over the elastics of the second fold 52, the distance "e" is irrelevant. The distance "f" is practically the same (i.e. measured from the elastic of the second bend 52 to the elastic of the second bend 54) which is supplied in Figure 3a. Therefore the distance "f" is established in the same way in 5 mm. The gap "g" is practically the same (i.e., measured from the elastic of the second bend 54 to the junction of the bend 70) that is provided in Figure 3a. Therefore, the distance "f" is established in the same way in 3 mm. Accordingly, the sum of said widths for the double bend 30 is equal to 15 mm. Then, we recognize that there are two double folds 30 per absorbent article (ie, one on each side), the two double folds 30 representing 30 mm of the general width of said article. Finally, we assume a common distance between said double bends of 115 mm. In this way, the general width of the absorbent article of the previous industry within the crotch region is equal to 145 mm. When comparing the general width of Figure 3a (previous industry, measuring 165 mm) and Figure 4a (present invention, measuring 145 mm), the difference is 20 mm. This reduction in overall width within the crotch region provides the user with a sense of comfort and durability. For example, young children who use diapers in accordance with the present invention, walk more naturally since the crotch region is narrower and therefore said diapers do not interfere with the inner part of the user's leg. Additionally, caregivers and sometimes even young children prefer a diaper that has a narrower crotch since aesthetically it is more like underwear. The last benefit offered by the product is especially important as children learn the difference between diapers and underwear (for example, toilet training). Fig. 5 is a fragmentary cross-sectional view taken along the line of section 5-5 of Fig. 1 describing the manufacture of the diaper in the first region of the cinch 36 of the diaper 20 while forming before being applied to a user (ie, the diaper is exposed to elastic contraction). The first fold is placed 40 face down (for example, folded to create the crease of the fold 82) and then attached to the upper canvas 24 to make it better suit the user's ciníura region. The first fold 40 can be joined to the upper canvas 24 by making a fold of the fold down 80 which can be an adhesive, ultrasonic, compression, thermal bond, combinations thereof and any other suitable joining means for the specific materials employed and known in the art. the industry. Additionally, the side panels 90 may be supplied in the first and second regions of the belt 36, 38 adjacent the longitudinal ends 14. The side panels 90 may comprise a side panel elastic 92 and a side panel cover 94, wherein the side panel elastic 92 is positioned between said side panel cover 94 and the bottom sheet 26. It is possible to use the adhesive 23, or any other suitable material or method for joining the components together and to the distal end of the fold 39. Figure 6 is a fragmentary sectional view taken along the line of section 2-2 of Figure 1 and describes another illustrative non-limiting embodiment of a diaper construction in the crotch region 37 while forming before apply it to a user (for example, the diaper undergoes elastic contraction). The double fold 130 has a first fold 140 and a second fold 150 joined by means of an adhesive 178 or any other suitable joining material or technique. In this way, the double fold 130 is more alio and coniiene better body exudates. While only one location of the adhesive 178 is illustrated, one skilled in the industry will know that it is possible to use various locations and configurations of the adhesive. Figure 7 is a fragmentary sectional view taken along the line of section 2-2 of Figure 1 and describes another illustrative non-limiting embodiment of a diaper construction in the crotch region 37 while forming anis apply it to a user (for example, the diaper undergoes elastic contraction). The second fold 150 can be constructed to remain upright without the aid of additional elements (eg, the adhesive 178). For example, the elastic 52 and / or the elastic 54 can be manufactured from a material with a larger diameter than that of the elastics 42 and 44. In another example, the elastic 52 and / or 54 can be applied with higher tension. In yet another example, the elastic 52 can be conical and the elastic 54 can be joined near its exits to create a drawstring. One skilled in the art will appreciate that such a technique can be applied to the first bend 140 and its respective elastics 42 and 44. Figures 8 and 9 are fragmentary sectional views taken along the line of section 2-2 of Figure 1. and describe another modality of a diaper construction in the crotch region 37 years later it is formed by applying it to a user (e.g., the diaper is subjected to elastic confraction). More specifically, Figure 8 describes an exemplary embodiment wherein the first fold 140 is higher than the second fold 150. Conversely, Figure 9 describes an illustrative embodiment wherein the second fold 150 is higher than the first fold 140. Figure 10a is a close-up view taken within the encircled portion 10 of Figure 2 illustrating a bending technique of the bending material wherein one end of the lower bending material is placed longitudinally outside the bending joint.; 33a Alternatively Figure 10a is a close-up view taken in from the encircled portion 10 of Figure 2 illustrating a folding technique of the bending material wherein an exfrem of the lower bending material is placed longitudinally towards the bottom of the joint of the fold: 33a While it is possible to use both bending techniques in the present invention, the technique of Figure 10a is preferred since the bending material can be cut in line; while the technique of Figure 10b requires that the bending material be previously cut for later handling. Embodiments of the present invention may also include pockets for receiving and containing debris, spacers providing voids for debris, barriers to limit the movement of debris in the article, compartments or voids that receive and retain waste materials deposited in the diaper. 20, and the like, or any combination of these. Some examples of pockets and spacers that are used in absorbent products are described in US Pat. 5,514,121 issued to Roe et al. on May 7, 1996, entitled "Diaper Having Expulsive Spacer" (diaper with ejector spacer); United States Patent No. 5,171,236 issued to Dreier et al. on December 15, 1992 entitled "Disposable Absorbent Article Having Core Spacers "(Disposable absorbent article with core spacers); United States Patent No. 5,397,318 issued to Dreier on March 14, 1995, entitled" Absorbent Article Having a Pocket Cuff ". U.S. Patent 5,540,671 issued to Dreier on July 30, 1996 entitled "Absorbent Article Having A Pocket Cuff With An Apex" (absorbent article with pocket fold and apex), PCT application WO 93/25172 published on 3 December 1993 entitled "Spacers For Use In Hygienic Absorbent Articles And Disposable Absorbent Articles Having Such Spacer" (spacers used in hygienic absorbent articles and disposable absorbent articles containing said spacer), US Patent No. 5,306,266"Flexible" Spacers For Use In Disposable Absorbení Articles "(flexible spacers for use with disposable absorbent articles) granted to Freeland on April 26, 1994, and United States Patent No. 5,997,520 entitled" Disposable Absorbent Article With Selectively Expandable or Inflatable Component ". optionally inflatable or expandable component) issued to Ahr et al on December 7, 1999. Some examples of receptacles and voids are disclosed in US Pat. No. 4,968,312, "Disposable Fecal Compartmentalizing Diaper" (Disposable diaper comparfied to contain fecal matter) granted to Khan on November 6, 1990, United States Patent No. 4,990,147 entitled "Absorbent Article With Elastic Liner For Waste Isolative Material" (Absorbent article with elastic liner to isolate waste) granted to Freeland on February 5 of 1991, U.S. Patent No. 5,062,840, entitled "Disposable Diapers" (Disposable diapers) granted to Holí et al on November 5, 1991; United States Pamphlet no. 5,269,755 entitled "Trisection Topsheets For Disposable Absorbent Articles And Disposable Absorbent Articles Having Such Trisection Topsheets" (Top sheets of sections for disposable absorbent articles and absorbent articles that include such upper three-section canvases) issued to Freeland et al. On December 14 of 1993. Some examples of suitable barriers are described in U.S. Pat. 5,554,142 entitled "Absorbent Article Having Multiple Effective Height Transverse Partition" (Absorbent articles with multiple cross-sectional separations of effective color) granted on Sept. 10, 1996 to Dreier et al .; PCT of WO 94/14395 entitled "Absorbent Article Having An Upstanding Transverse Partification" published on July 7, 1994 in the name of Freeland, et al .; and United States Patent No. 5,653,703 entitled "Absorbent Article Having Angular Upstanding Transverse Partition" granted on August 5, 1997 to Roe et al. Examples of other structures especially suitable for the handling of low viscosity feces are described in U.S. Pat. no. 5,941,864 issued to Roe et al. on August 24, 1999; United States patent no. 5,977,430 issued to Roe et al. on November 22, 2, 1999 and 6,013,063 issued to Roe et al. All references cited in the following description are incorporated herein by reference. In addition, the present invention may be suitable for other embodiments of the diaper including those described in U.S. Pat. no. 6,010,491 entitled "Viscous Fluid Bodily Waste Management Article" (Article for the management of visceral fluid body excretions) granted on January 4, 2000; no. 5,873,870 entitled "Fit And Sustained Fit Of A Diaper Via Chassis And Core Modifications" (Adjustment and prolonged adjustment of a diaper by means of modifications of the frame and the core) granted on February 23, 1999; no. 5,897,545 tiilated "Elasfomeric Side Panel for Use with Convertible Absorbení Articles" (elasomeric side panel for convertible absorbent articles) granted on April 27, 1999; no. 5,904,673 entitled "Absorbení Article With Sírucfural Elasíic-Like Film Web Waisí Belt" (Absorbing article with a film waist band of film similar to an elastic paper), issued on May 18, 1999; no. 5,931, 827 entitled "Dlsposable Pulí On Pañí" (disposable training underpants) issued August 3, 1999; no. 5,977,430 titled "Absorbent Article With Macro-Particulate Storage Structure "(Absorbing article with macroparticulate storage structure) granted on November 2, 1999, and No. 6,004,306 entitled" Absorbení Article With Multi-Directional Extensible Side Panels "(Absorbing article with extensible mulfidirectional side panels) granted on December 21 of 1999, which are incorporated in this document as a reference.All documents mentioned herein are considered incorporated in their relevant part as reference.The citation of any document should not be construed as an admission that it represents a prior industry with respect to Although specific embodiments of the present invention have been illustrated and described, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. cover all the changes in the appended claims and modifications that are within the scope of the invention.

Claims (10)

1. A unitary, absorbent and disposable article, characterized in that it comprises: An absorbent core having a surface facing the clothes and a surface facing the body; a liquid permeable upper sheet placed adjacent to the surface facing the absorbent core body; and a lower liquid impermeable sheet located adjacent to the garment-oriented surface of the absorbent core; and a double fold that is contractible elastically, which has a proximal end and a distal end, the double fold is joined to the article by a fold connection, the double fold has a first and a second fold, the first fold is placed between the proximal end and the bending joint, the second bending is placed between the bending joint and the distal end, the double bending is manufactured from a continuous bending material that is found inside the bending joint, where the distal end is formed folding the bending material, wherein the proximal end is formed by folding the bending material; wherein the fold encloses at least a first elastic, wherein the first elastic includes a first and a second end and in that the first elastic is secured to the first bend near the first and second ends; wherein the second bend encloses at least one elastic second, wherein the second elastic includes a first and a second end and in that the second elastic is secured to the second bend near the first and second ends; wherein the first and second fold are barrier folds.

2. The absorbent article according to claim 1, further characterized in that the folds enclose at least one elastic.

3. The absorbent article according to claim 2, further characterized in that the elastic is operatively associated with the first fold securing it with an elastic fastening element.

4. The absorbent article according to claim 1, further characterized in that the second fold encloses at least one elastic.

5. The absorbent article according to claim 4, further characterized in that the elastic is operatively associated with the second fold securing it with the elastic fastening element.

6. The absorbent article according to claim 1, further characterized in that the article is a disposable diaper.

7. The absorbent article according to claim 6, further characterized in that the disposable diaper is a pre-adjusted diaper. The absorbent article according to claim 1, further characterized in that the continuous bending material is formed from a material less permeable to water with a more water-permeable material placed within the less water-permeable material. 9. The absorbent article according to claim 1, further characterized in that the double fold is joined to the article by a single joint. 10. The absorbent article according to claim 9, further characterized in that the only joint is the join of the fold.