MXPA98006721A - Disposable shoes that are j - Google Patents

Disposable shoes that are j

Info

Publication number
MXPA98006721A
MXPA98006721A MXPA/A/1998/006721A MX9806721A MXPA98006721A MX PA98006721 A MXPA98006721 A MX PA98006721A MX 9806721 A MX9806721 A MX 9806721A MX PA98006721 A MXPA98006721 A MX PA98006721A
Authority
MX
Mexico
Prior art keywords
panel
region
layer
belt
seam
Prior art date
Application number
MXPA/A/1998/006721A
Other languages
Spanish (es)
Inventor
Barclay Buell Kenneth
Paul Carlin Edward
Original Assignee
The Procter & Gamble Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by The Procter & Gamble Company filed Critical The Procter & Gamble Company
Publication of MXPA98006721A publication Critical patent/MXPA98006721A/en

Links

Abstract

The present invention relates to pulled garments provided with an intermittent overlap seam joining the front region and the back region together, at separate locations to provide a breathable seam. In a preferred embodiment, the garment that is pulled includes a frame layer comprising a continuous sheet defining a front region, a back region, and a crotch region, a first belt layer attached to the frame layer in the region front, a followed belt layer attached to the frame layer in the rear region, elastic panel members placed between the belt layers and the frame layers, which laminate is mechanically stretched to form elastically extensible stretch laminates in both the region frontal as the posterior region on the side panels, and intermittent overlap seams joining the frontal region to the posterior region the separate locations to form the leg openings and the belt openings

Description

DISPOSABLE SHOE THAT JALA FIELD OF THE INVENTION The present invention relates to disposable garments that are pulled which are made by inserting the legs of the user into the leg openings and sliding the garment until it is placed around the lower torso. Examples of these disposable garments that are pulled include disposable undergarments, pull-on diapers, training pants, and disposable panties for menstrual use. The present invention relates more particularly to pull-out, disposable, unitary absorbent garments, such as pulling diapers, training pants, pull-on briefs and the like, which provide improved wearing comfort, protection against Increased runoff and sustained dynamic adjustment.
BACKGROUND OF THE INVENTION Babies and other incontinent individuals use disposable absorbent articles, such as diapers, to receive and contain urine and other exudates from the body. Absorbent garments that have fixed sides (for example, training pants or diapers that pull) have become popular for use in children able to walk and those who are trained in the toilet. In order to contain the exudates of the body as well as adjust to a wide variety and sizes of the body, these briefs should fit comfortably around the user's waist and legs, without falling, loosening or sliding down from their position on the torso, as well as adjusting to larger users without causing skin irritation, because the product is too narrow.
In this way the underpants should have elastic extension capacity in the waist and legs with the elastic characteristics that provide a high degree of stretch. Many of the training pants and diapers that are pulled utilize conventional elastic elements secured in an elastically contractible condition at the waist and leg openings. Typically, in order to ensure full elastic fit around the leg and waist, as provided with durable undergarments, the leg openings and waist opening are surrounded by elasticized rubber bands or other materials placed throughout. of the opening curve. These underpants are typically characterized as "balloon-like" underpants, because of the contraction caused by the elasticized bands in specific areas of the product while the remaining material tends to form the waist. Examples of such training underpants are described in U.S. Patent 5,171, 239 of Igaue, and others on December 15, 1992, and U.S. Patent 4,610,681 to Strohbeen et al. On September 9, 1986. Although these underpants will allow the adjustment of various waists and leg sizes due to the fact that the contractive elastic openings will expand to fit various sizes of users, these products still fit a limited scale of fit sizes because the items are contracting and not They have a high degree of stretch. The elastic bands used in the waist opening and the leg openings also tend to concentrate the forces of (shaping) in a narrow area of the user's body leading to an increased incidence of skin marking of the wearer. In addition, the sides and the rest of the products are typically non-extensible elastically thus reducing the fit or notch. In order to solve this deficiency of balloon style underpants, some manufacturers have placed elastic threads through the entire front and back regions of the product. For example WO 93/17648 published September 16, 1993, discloses a brief type diaper in which the front and / or back parts are elastically contractible, and the ends of the absorbent core are disposed in these regions. These additional elastic threads act to contract all of the front and back waist portions of the underpants, including the extreme areas of the absorbent core. This allows a greater expansion of the product in the waist region, however it causes the absorbent core to collect and bulge in the waist opening. This recollection and bulging results in a greater risk of runoff at the waist, since channels are created along the absorbent core that allow exudates from the body to pass as a wick or flow out of the waist. This recollection of the absorbent core also affects the appearance of the product in that the product does not appear as aesthetically pleasing as the balloon style underpants. Another type of training pants is shown in U.S. Patent 4,940,464, issued to Van Gompel, and others, on July 10, 1990, wherein a panty-shaped garment is formed by fixing discrete members capable of stretching the lateral edges of the main body of the garment. This stretchable member allows the article to adjust to size variations as the stretchable member expands to meet or find the user's size. However, the stitching of the main body with the stretchable members is a major problem in the product, and in the manufacturing process. The seams must be made extremely strong and capable of handling large forces during application and use. Underpants are subjected to severe forces and stresses during use, which can cause the side panels to tear or tear off the main body portion. Furthermore, controlling these separate stretchable members severely complicates the manufacturing process and causes these underpants to be more costly to the consumer. The seams of the main body portion also tend to concentrate the shaping forces on the upper and lower part of the product, resulting in increased seam tearing and poor fit of the garment. U.S. Patent 5,246,433 issued to Hasse, Bridges and Miller on September 21, 1993, discloses a brief that has side panels of stretch lamination as well as elastic waistbands and leg bands. The stretch laminates on the side panels provide stretch on the sides of the product to improve the fit of the underpants on the wearer. The stretch laminates are unitary with the rest of the underpants to overcome the disadvantages associated with underpants having separate and discrete elastic panel members attached thereto, while improving fit over conventional balloon style underpants. However, these underpants suffer from the disadvantage that the panels are not able to stretch sufficiently to allow the user to easily pull the underpants by themselves.
The stretch laminates disclosed herein provide a limited amount of stretch. In addition, the materials used to form the stretch laminates may have problems with tearing or shredding during use, resulting in products that are discarded by the manufacturer. Another disadvantage with all of these products is the breathing capacity of the product. The pant panels are typically formed by films or foams that can preclude the breathing capacity of such products. This lack of breathing ability can result in a hot ventilated product for the user. Therefore, it is an object of the present invention to provide a disposable garment that is pulled with a high degree of stretch, such that the garment will fit in a molded manner to the users in a wide scale of sizes. It is a further object of the present invention to provide a disposable garment that is pulled with breathable seams that join the front and back regions together. It is a further object of the present invention to provide a garment that is pulled with a high degree of breathability in at least the side panels, and more preferably in the waistband areas, to allow the transmission of the vapor in such a way that the Garment is not hot and badly ventilated.
BRIEF DESCRIPTION OF THE INVENTION The pull-out disposable garments of the present invention are preferably unitary disposable absorbent garments such as pulling diapers or training pants, capable of withstanding the forces encountered during use, while being relatively simple and cost-effective to manufacture. In a preferred embodiment, the garment that is pulled is provided with a continuous belt in the front region and in the rear region to distribute the forces generated during use, for the purpose of improving the fit of the garment that is pulled on the wearer . The contiguous belt has a central panel comprising an elastically collapsible waistband panel and a centrally located non-fixed panel, extendable side panels on either side of the center panel, and seam panels such that the sides and upper central waist of the garment expand, to allow the garment to be made easily, to move with the wearer during use, to maintain the fit of the garment during use, and to keep the absorbent core close to the body to better contain discharged exudates while not binding The absorbent core in a way that increases the likelihood of runoff. In especially preferred embodiments, the garments that are pulled are not uncomfortable for the user, because they are provided with means that allow the transmission of the vapor through ventilation holes or openings, or that use materials capable of breathing to form the garment. . In an especially preferred embodiment, the garment that is pulled comprises a frame layer comprising a continuous sheet defining a front region, a back region, and a crotch region, a first belt layer attached to the frame layer in the frontal region; a second belt layer attached to the frame layer in the rear region; and elastic panel members positioned between the belt layers and the frame layers, which laminate is mechanically stretched to form elastically stretchable stretch laminates in both the front region, as the back region of the side panels, and intermittent overlap seams that they join the frontal region to the posterior region to form the leg openings and the waist openings. The intermittent seam of overlap links the frontal region to the posterior region in separate locations per se, to form a breathable seam that allows the transmission of vapor. The continuous frame layer and the belt layers in combination with other elements thus form the continuous belt of the garment that is pulled. Because the belt layers continuously extend laterally across the waist region and do not cover the entire crotch region, and because the chassis layer is thus exposed in the crotch region, the Garment that pulls has a unique aesthetic feature that is that consumers perceive it as providing a similar feeling to waist fabric and better containment characteristics in the crotch region. The pulled garment also preferably comprises a characteristic of elastic waist and elastic leg features, more preferably an absorbent frame such as a top sheet and an absorbent core for containing exudates from the body, and most preferably openings and ventilation holes. in at least the side panels to increase the breathing capacity of the garment that is pulled.
BRIEF DESCRIPTION OF THE DRAWINGS Although the description concludes with the claims that point particularly and differently claim the matter that is considered to form the present invention, it is believed, that the invention will be better understood from the following description, which is taken in combination with the accompanying drawings and in which the designations in which like designations are used to designate substantially identical elements, and in which: Figure 1 is a perspective view of the disposable garment that is pulled from the present invention in a configuration of use typical Figure 1 A is a simplified plan view of the garment that is pulled from the present invention, in its uncompacted, flat condition, showing the different panels or zones of the garment; Figure 2 is a plan view of the garment that is pulled from the present invention in its uncompacted, flat condition showing the external surface and having cut-out positions to reveal the underlying structure, Figure 3 is a fragmentary view of the garment that is pulled shown in Figure 2, taken along section line 3-3 of Figure 2; Figure 4 is a plan view of the garment that is pulled from the present invention in its uncompacted, flat condition showing the inner surface and having portions cut away to reveal the underlying structure; Figure 5 is a perspective cross-sectional view of an alternative embodiment of the garment that is pulled from the present invention; Figure 6 is a perspective cross-sectional view of a further alternative embodiment of the garment that is pulled from the present invention; Figure 7 is a cross-sectional perspective view of another alternative embodiment of the garment that is pulled from the present invention; Figure 8 is a fragmentary cross-sectional view of an alternate elastic garment characteristic of the crotch region for use in the garment being pulled of the present invention; Figure 8A is a fragmentary cross-sectional view of the elastic garment feature shown in Figure 8 in the front region; Figure 9 is a plan view and an alternate embodiment of the present invention, wherein the frame layer has been made with "windows" to increase the breathing capacity of the garment that is pulled on the waistband panel; Figure 10 is a cross-sectional perspective view of yet another alternative embodiment of the garment that is pulled from the present invention; Figure 11 is a plan view of a sewing pattern of the present invention; Figure 12 is a plot of the stress / strain curve in grams per one inch of sample width of a particularly preferred elastomeric material to be used as the elastic panel member in the stretch laminates of the present invention; Figure 13 is a stress / strain graph, both extension and recovery curves in grams per one inch of sample width of a stretch laminate of the present invention having no vent holes; and Figure 14 is a graph of the stress / strain curve in grams per one inch width of the stretch laminate sample of Figure 13, showing the wall of force generated by these stretch laminates.
DETAILED DESCRIPTION OF THE INVENTION As used herein, the term "pulling garment" refers to wearing articles that have a waist opening and a pair of defined leg openings, and which are pulled on the user's body, inserting the legs inside the leg openings and pulling the item up on the waist. The term "disposable" is used herein to describe garments that are not intended to be laundered or otherwise restored or reused as a garment, (i.e., are intended to be discarded after a single use and, preferably, to be recycled, composted or otherwise arranged in an environmentally compatible manner). A garment that is pulled "unitary" refers to garments that are pulled, which are formed of separate parts joined together to form a coordinated entity. The garment that is pulled is also preferably "absorbent", to absorb and contain the different exudates discharged from the body. A preferred embodiment of the pull-on garment of the present invention is the disposable, unitary, pulling diaper absorbent garment shown in Figure 1. As used herein, the term "pulling diaper" is used. refers to clothes that are pulled generally used by babies and other incontinent individuals to absorb urine and feces. However, it should be understood that the present invention also applies to other garments that are pulled such as training pants, incontinence briefs, garments or panties for feminine hygiene, and the like. Figure 1 is a perspective view of the pulling diaper 20 of the present invention. The pulling diaper 20 has an outer surface 22, an inner surface 24 opposite the outer surface 22, a front region 26, a back region 28, a crotch region 30, and seams 32 that join together in the front region 26 and the rear region 28 to form the leg openings 34 and a waist opening 36. A continuous belt 38 is formed around the waist opening 33. The continuous belt 38 acts to dynamically create forces of shaping or adjustment and to distribute Dynamically generated forces during use. The diaper that is pulled 20 thus preferably comprises a frame layer 40; a first belt layer 42; a second belt layer 44; an elastically extensible stretch laminate positioned on each side panel of the front region 26, front stretch laminate 46; an elastically extensible stretch laminate placed in each side panel of the rear region 28, backsheet laminates 48; and an elastic waist feature 50 positioned in both the front region 26 and the back region 28. The pulling diaper 20 further comprises elastic leg features 52. (In an alternate embodiment, ventilation openings or holes are most preferably provided (FIG. not shown) in at least the side panels of the diaper that is pulled 20 to provide breathing and ventilation capability.) Because the first belt layer 42 and the second belt layer 44 (the belt layers) are preferably wefts nonwoven having a fabric appearance, and the frame layer 40 is preferably a plastic film, the diaper that pulls has a unique aesthetic characteristic in that it is perceived by the people who care and the users to have a comfort and feel similar to the garment in the waist regions, while they have a perceived benefit of containment in the crotch region. . Figure 1A shows a simplified plan view of the diaper 20 pulled from Figure 1 is its planar state, without contracting in spite of the different panels and their placements with respect to each other. The term "panel" is used herein to denote an area or element of the diaper that is pulled or of the belt (while a panel is typically a different area or element, a panel may coincide (or respond functionally) a bit with a adjacent panel The diaper 20 being pulled has a crotch region 30 comprising a main panel 56 and a pair of leg flap panels 58, a front region 26 comprising a central panel comprising a waistband panel 60 and a panel 62 located in the center, side panels 64, and seam panels 66, and a rear region 28 comprising a central panel comprising a waistband panel 60 'and a panel 62' located in the center, side panels 64 'and seam panels 66 '.
The crotch region 30 is the portion of the diaper 20 that is pulled from which the continuous belt (the other panels) emanates. The absorbent core is generally positioned within the main panel 56 as the exudates are typically discharged in this region, although the absorbent core will typically extend within the middle panels 62 and 62 'of the belt. A leg flap panel 58 extends generally laterally outwardly from and along each lateral edge 68 of the main panel 56. Each leg flap panel 58 generally forms at least a portion of the elastic leg feature. The continuous belt (the front region 26 and the rear region 28) extends generally longitudinally outwardly from and along each side edge 69 of the crotch region 30 (the main panel 56 and the leg flap panel 58) . In the front region 26, the panel 62 located in the center of the central panel extends generally longitudinally outwardly from and along the side edge 69 of the crotch region 30. The waistband panel 60 generally extends longitudinally outwardly. from and along the panel 62 located in the center. The side panels 64, each, generally extend laterally outwards from and along the central panel. The seam panels 66 each extend generally laterally outwardly from and along the respective side panel 64. In the rear region 28, the panel 62 'located in the center, of the central panel extends generally longitudinally outwardly. from and along the other side edge 69 of the crotch region 30. The waistband panel 60 'extends generally longitudinally outwardly from and along the panel located at the center 62'. The side panels 64 'each extend generally laterally outwardly from and along the central panel. The sewing panels 66 'each extend generally laterally outwardly from and along the respective side panel 64'. The front region 26, in addition to its panels, also has an end edge 70, leg edges 71, and side edges 72. The rear region 28, in addition to its panels also has an end edge 70 ', leg edges 71' and 72 'side edges. The crotch region 30 also has leg edges 74. Figure 2 is a partially cut-away plan view of the diaper 20 pulled from Figure 1 in its flat state, in its uncompromised state (i.e., with induced contraction). by the elastic, pulled outward, except in the side panels 64 where the stretch laminates (front stretch laminates 46 and back stretch laminates 48) are left in their relaxed condition), with the outer surface 22 giving the observer, before the front region 26 and the back region 28 are joined together by the seams 32. The outer surface 22 of the diaper 20 that is pulled comprises that portion that is placed away from the body of the diaper. user during use. In the embodiment shown, the outer surface 22 of the diaper 20 being pulled comprises the first belt layer 42 in the front region 26, the second belt layer 44 in the rear region 28, and the frame layer 40 in the region of crotch 30. (The inner surface 24 of the diaper is opposite the outer surface 22, and comprises that portion of the diaper that is placed adjacent the wearer's body during use). In the embodiment shown in Figure 2, the frame layer 40 preferably comprises a continuous sheet or web defining the front region 26, the back region 28, and the crotch region 30. In this manner, the frame layer 40 is the layer or primary layer of the diaper that is pulled. (As used herein, the term "layer" does not necessarily limit a single layer of material in which a layer can actually comprise laminates or combinations of sheets or webs of the type of material required). The frame layer 40 has an inner surface 76 (not shown in Figure 2) and an outer surface 77. The inner surface 76 and the outer surface 77 of the frame layer 40 correspond in their orientation to the inner surface 24 and the inner surface 24. outer surface 22 of the diaper 20 being pulled. Since the frame layer 40 preferably defines the front region 26, the rear region 28 and the crotch region 30, the frame layer 40 also has corresponding regions and panels as defined above. (For simplicity, these regions and panels are denoted in the drawings by the same reference numerals as the corresponding diaper regions that pull and the panels as shown in Figure 1. The first belt layer 42 is placed on the surface external 77 of the frame layer 40 in the front region 26, and continuously extends laterally across the front region 26 from one side edge 72 towards the other side edge 72, and longitudinally from the end edge 70 towards at least the leg edges 71. The first belt layer 42 is preferably attached to the frame layer 40. The second belt layer 44 is placed on the outer surface 77 of the frame layer 40 in the rear region 28, and extends continuously laterally through the rear region 28, one end from a side edge 72 'towards the other side edge 72' and from the end edge 70 'towards at least the end edges 71 The second belt layer 44 is preferably attached to the frame layer 40. In this way, each belt layer in combination with the frame layer 40 forms a continuous belt (as shown in Figure 1) around the belt. waist of the user. As will be detailed below, this belt has different elastic tension properties in different zones to increase the fit and containment of the diaper 20 being pulled. The elastically extensible stretch laminates (front stretch laminates 46 and rear stretch laminates 48) are formed in each side panel of both the front region 26 and the rear region 28. Each front stretch laminate 46 at least comprises the portion of the first belt layer 42 on the side panel and an elastic panel member 78 attached thereto, and, in this particular embodiment, the portion of the frame layer 40 that forms the side panel. Preferably, the elastic panel member 78 is placed between the frame layer 40 and the first belt layer 42, and more preferably extends longitudinally from an end edge 70, most preferably towards the leg edge 71. Each subsequent stretch laminate 48 at least comprises the portion of the second belt layer 44 in each side panel and an elastic panel member 78 attached thereto, and, in this particular embodiment, the portion of the frame layer 40 forming the side panel. Preferably, the elastic panel member 78 'is positioned between the frame layer 40 and the second belt layer 44, and more preferably extends longitudinally from the end edge 70', mu and preferably towards the leg edge 71. In the diaper embodiment shown in Figure 2, each stretch laminate side further comprises a portion of the top sheet 80 (the barrier layer) in the side panel. Each stretch sheet is stretched or pulled mechanically (designated by the stress lines) to allow the stretch laminate to be stretchable elastically in at least the lateral direction. (The lateral direction (direction or width x) is defined as the direction parallel to the lateral center direction of the diaper being pulled, the longitudinal direction (direction or length y) is defined as the direction parallel to the longitudinal center line; axial direction (direction or thickness z) is defined as the direction that extends through the thickness of the diaper that is pulled). An elastic waist feature 50 is provided in the waistband panel of the front region 26, the back region 28 or preferably both in the front region 26 and in the back region 28. The elastic waist feature 50 provides an elastically extensible member, preferably an elastically shrinkable member, picked up, to dynamically adjust and conform to the wearer's waist in the center panels. In the embodiment shown, the elastic waist feature 50 preferably comprises a waist / waistband cover 82 operatively joined to the waistband panel in an elastically contractible condition, preferably to the primary layer of the top sheet 80. The waist / waistband cover 82 unit acts as a barrier to draining the exudates out of the waist opening of the diaper 20 being pulled, as well as a collapsible waistband to provide adjustment of the diaper 20 which is pulled around the wearer's waist. In highly preferred embodiments, the unitary waist / waistband cover is also breathable to allow venting of water vapor away from the diaper that is pulled adjacent to the waist opening. Also provided is the diaper 20 which is pulled with elastic leg features 52 to improve fit to the legs in the crotch region 30. The pulled diaper 20 further comprises a top sheet 80 and an absorbent core 84 positioned between the sheet upper 80 and frame layer 40, to provide an absorbent assembly that cooperates with the continuous belt to contain discharged exudates. Ventilation openings or vents can also be placed on the side panels to provide breathing or ventilation capacity. Figure 3 is a cross-sectional perspective view of the pull-on diaper 20 of the present invention, taken along the line 3-3 of Figure 2, in the front region 26. The frame layer 40 is shown as forming the primary layer or layer of the diaper 20 which is pulled and has an inner surface 76 and an outer surface 77. The first belt layer 42 is placed on the outer surface 77 of the frame layer 40, to form the outer surface 22 of the diaper 20 being pulled in the front region 26. The elastic panel members 78 are preferably positioned between the first belt layer 42 and the frame layer 40. The topsheet 80 is placed over and attached to the inner surface 76 of the frame layer 40. The topsheet 80 preferably comprises a liquid-permeable primary layer 86 and two barrier layers 88. The barrier layers 88 extend generally outwardly from the primary layer 86 toward the side edges. 72. Each barrier layer 88 comprises a fin portion 90 and an upstanding portion 92. The upstanding portion 92 is not attached to the primary layer 86, to allow the gathering forces of the elastic separation members 94 to cause erect portions 92 rise away from the surface of the primary layer 86 to form a barrier or wall during use. The fin portion 90 extends laterally outwardly from the upstanding portion 92 (the proximal edge) makes the lateral edge 72. The absorbent core 84 is preferably positioned between the primary layer 86 and the frame layer 40. The construction of the rear region 28 is preferably identical to the construction of the front region 26. Figure 4 is a partially cut-away plan view of the diaper 20 being pulled from the present invention in its planar state, in its non-contracted state (i.e. with the contraction induced by the elastic pulled outward, except in the side panels where the stretch laminates of their relaxed condition are left), with the inner surface 24 of the diaper 20 being pulled towards the observer, before it is the front region 26 and the back region 24 together by the seams. In order to provide the absorbency necessary to contain the exudates from the body, the diaper 20 being pulled comprises an upper sheet 80 permeable to the liquid and an absorbent core 84 positioned between the upper sheet 80 and the frame layer 40. In the embodiment shown in Figure 4, the upper sheet 80 preferably comprises 3 distinct layers joined together. A liquid permeable primary layer 86 is placed on the absorbent core 84 to rapidly absorb liquids within the product. The barrier layers 88 are bonded to the primary layer 86 and are capable of preferably stretching, more preferably hydrophobic, to allow the side panels to be mechanically stretched without tearing or tearing while providing barrier folds along the sides of the diaper. 20 that pulls. The barrier layers 88 have a fin portion 90 and an upstanding channel or portion 92 to provide the different components of the elastic leg features 52.
The elastic leg features 52 preferably comprise a packing fold and a barrier fold. The packing gusset is preferably formed by one or more elastic leg members 96 operatively attached to the frame layer 40, the barrier layer 88 or both, preferably between the frame layer 40 and the fin portion 90 of the layer. barrier 88 in the leg flap panel of the crotch region 30. the barrier cuff is preferably formed by a fin (the upright portion 92 of the barrier layer 88), closing means for securing the longitudinal ends of the portions upright 92 to the primary layer 86, and an elastic spacing member 94 operatively joined to the upright portion 92. in the construction of nappies pull of the present invention as shown in Figure 1, a continuous belt is formed 38 around the waist opening 36. This belt 38 acts to dynamically create forces of conformation or adjustment in the diaper that is pulled, when placed on the er, to maintain the diaper is pulled on the er even when loaded with body exudates thus keeping the absorbent core in close user proximity, and to distribute the forces dynamically generated during about the waist, which additional support is provided to the core Absorbent without binding or bulking the absorbent core in the panel located in the center of the diaper that is pulled. The belt is designed to make elastically extensible in certain segments and at least elastically extensible preferably elastically contractible, in other segments about the waist opening, for elastically extensible about a portion of a leg opening, and for not picking or bulking in the panel located in the center where the absorbent core is located. The ability of elastic extension belt also has a "wall" force / extension beyond which it will not extend elastically to the belt in order to allow the diaper to be pulled more easily applied since the diaper will not stretch excessively allowing in this way the product to slide more easily on the buttocks. This "wall strength / extension" is especially important for young children who apply the product and who would be unable to pull and completely place a fully stretchable product on their buttocks. The belt handles the stresses best used with the belt frames that surround the absorbent core. The resulting diaper is less bulky in its fit around the er's waist. The lack of recoil or contraction of the belt on the absorbent core, in combination with the continuity of the belt through the absorbent core, also provides improved fit providing a normal continuous force based on the hip tensions generated by the belt, which tend to press the absorbent core against the body during use. In this way, the absorbent core is maintained in a narrower, more comfortable and less separation than those diapers that provide elastic shrinkage or gathering over the area of the absorbent core, or those that do not provide a belt to concentrate within the space and distribute the hip tensions around the area of the absorbent core through space. As shown in Figure 1A, the belt 38, in both of the front region 26 and the rear region 28 respectively, comprises a central panel comprising a waistband panel 60 and 60 'and a panel 62 and 62' located in the center, a side panel 64, 64 'on each side of the center panel, and a seam panel 66 and 66' on each side panel 64, 64 '. The side panels are elastically extensible to provide fit within the sides of the diaper that is pulled. The waistband panel is elastically extensible, preferably elastically shrinkable or picked up, to better adjust the diaper that is pulled in the central part of the waist opening. The panel located in the center is not collected for the purpose of maintaining the integrity of the absorbent core during use. Although the panel located in the center may be elastically extensible (but not picked up) as discussed herein, in the embodiments shown in Figures 1 to 4, the panel located in the center is preferably non-extensible. The continuous belt 38 can be formed from a number of different materials and layers as defined below. The belt 38 comprises at least a first belt layer 42 and a second belt layer 54 joined together on each side in the seam panels 66 and 66 '. In the embodiment shown in Figures 1 to 4, the belt 38 preferably comprises a portion of the frame layer 40, the belt layers (the first belt layer 42 in the front region 26, and the second belt layer 44). in the back region 28), stretch laminates (front stretch laminate 46 and back stretch laminates 48), in the side panels and an elastic waist feature 50 in each waistband panel, preferably comprising a waist / waistband cover 82 unit joined operatively in an elastically collapsible condition for collecting the belt 38 in the waistband panels 60 and 60 '. In preferred embodiments of the present invention, the frame layer 40 generally determines the overall shape of the diaper 20 that is pulled. The frame layer 40 acts as the main structural layer of the pulled diaper, to which other features can be added or joined. The frame layer is thus placed on all or most of the surface area of the diaper that is pulled, although in certain embodiments certain portions of the frame layer may be perforated, cut out or removed ("with windows") to increase the capacity. of stretching and / or the breathing capacity of the diaper that is pulled or the characteristics of the diaper that is pulled in that area. The frame layer preferably comprises a continuous web or sheet having no "seams" or "seams", such that the forces are transmitted distributively throughout the entire layer. As discussed hereinabove, the continuous sheet or web of the frame layer may comprise a single web of material or a laminate of several continuous webs or layers of different materials. The frame layer forms a part of the "continuous belt" that provides the strength / extension properties necessary to maintain the diaper on the wearer while expanding to allow the diaper to be easily pulled. The frame layer may form the outer surface, the inner surface, or parts of either or both, or it may be placed entirely within the diaper that is pulled. In the embodiment of the present invention shown in Figures 1 to 4, the frame layer preferably forms the outer surface of the diaper that is pulled, in the crotch region to provide the unique aesthetics of the diaper that is pulled. Since at least a portion of the frame layer 40 is subjected to mechanical stretching for the purpose of providing the stretch laminates on the side panels, it is preferably capable of elongation, most preferably capable of stretching (but not necessarily elastomeric), such that the frame layer, upon mechanical stretching, will be at least to a permanently elongated degree, such that it will not completely return to its original, undistorted configuration. The frame layer can thus comprise any of the known materials for use in absorbent articles such as woven or nonwoven webs, polymeric films, such as polyethylene thermoplastic films, polypropylene or mixtures thereof.; laminate of said materials; or mixed materials. In preferred embodiments, the frame layer can be mechanically stretched with minimal or no tearing or tearing. Therefore, the frame layer 40 is preferably a polymeric film.
Because the frame layer 40 is preferably a polymeric film, it is also generally impervious to liquids (eg, urine) in such a way that it can also serve as the component that prevents the exudates absorbed and contained in the absorbent core. moisten the garments with which the diaper is pulled, such as sheets and undergarments (that is, it acts like the traditional back sheet of the diaper). If the frame layer is not impervious to liquid, typically an additional layer such as a traditional backsheet should be used behind the absorbent core. The frame layer can also be breathable (permeable to air and water vapor) if desired. In particular, since the belt layers and preferably the barrier layers, are each stretchable nonwoven webs that strengthen the stretch laminates to cut the forces and since there is no need for a material resistant to high lateral tension in the crotch region, the frame layer can alternatively comprise breathable materials which are micro porous and which are typically less than stretch and elongation. An example of such a film is that manufactured by Exxon Chemical Company under the trade name EXXAIRE. Exemplary films to be used as the undercoat layer of the present invention which have relatively good stretchability but are not respirable include polymeric films manufactured by Clopay Corporation of Cincinnati, Ohio under the designation Clopay 1401, or available Tredegar de Terre films Huate, Indiana, under the designation X-8323 or X-9954. The size of the chassis layer is dictated by the size of the user of the diaper that is pulled that is designated to fit. In a preferred embodiment, the frame layer has a modified hourglass shape to improve the fit on the user. In a preferred embodiment designed to fit large babies (from about 9 kgms to about 15.4 kgms), the frame layer 40 is preferably approximately 483 mm long by approximately 234 mm wide in the frontal region and in the posterior region, and ap 165 mm wide in the crotch region. The central panel is 135 mm wide, the side panels are approximately 41 mm wide, the activated portion of the side panels is approximately 32 mm wide, and the seam panels are approximately 8.5 mm wide. (The actual overlap area of the seam panels is approximately 11 mm in the embodiments shown herein). The frontal region is approximately 14 mm long, the posterior region is approximately 165 mm long, and the crotch region is approximately 220 mm long. The belt layers (the first belt layer 42 and the second belt layer 44) act, preferably in combination with the frame layer 40 and other components, to form the continuous belt 38 around the waist opening 36 of the diaper 20 that pulls. The belt layers each in this manner preferably comprises a continuous sheet or web having no "seams" or "seams", such that the forces are distributed distributively throughout the entire belt layer. (The continuous sheet or web of each belt layer may comprise a single web of material or a laminate of several webs or continuous webs of different materials). The material of the belt layers also preferably provide resistance to the stretch laminates in the side panels to form the laminate of materials together, and allow mechanical stretching without undue tearing, tearing or fragmentation of the materials. In the embodiment shown in Figures 1 to 4, the belt layers are preferably placed on and attached to the outer surface of the frame layer to form a part of the outer surface of the diaper that is pulled. Nevertheless, the belt layers can be placed on the inner surface of the frame layer, and, in some embodiments, can form a part of the inner surface of the diaper that is pulled. Some of these alternative modalities are shown and described later. The belt layers are attached to the frame layer by the joining means (not shown) at least on the side panel. Suitable attachment means are described herein. The belt layers extend laterally continuously through the respective waist region (front region or back region) of the diaper that is pulled to provide the continuous belt 38 described herein and extend longitudinally from the end edge to approximately the region Crotch Alternatively, the belt layers may extend longitudinally towards the crotch region to provide the diaper that pulls with a greater feel similar to the garment. Although it is preferred that the first belt layer and the second belt layer extend longitudinally inward to leave a space therebetween in the crotch region to provide the aesthetic benefit described herein, these may be overlapped, if desired to provide a general appearance and feel in the form of cloth. Since the belt layers are subjected to mechanical stretching in the side panels, the belt layers are preferably stretchable, more preferably stretchable (but not necessarily elastomeric), without undue, or preferably none, tearing or tearing. In addition, because the belt layers are preferably placed on the outer surfaces of the diaper that is pulled, the belt layers are also preferably docile, soft-feeling and non-irritating to the user's skin, to give the diaper the feeling and comfort of a cloth garment. Suitable belt layers can be manufactured from a wide range of materials such as plastic films; plastic films with openings; woven patterns of natural woven or non-woven figures (for example, wood or cotton fibers), synthetic fibers (for example polyolefin fibers of polyamide, polyester, polyethylene or polypropylene, or a combination of natural and / or synthetic fibers, wefts woven or non-woven coated Preferably the belt layers comprise a nonwoven web of synthetic fibers In typical non-woven webs, localized breaks of the web are made in certain regions as the web passes between the mechanical draw rollers. This rupture may be attributed to a lack of the necessary extension capacity of the non-woven web or a lack of the ability to stretch of the individual fibers.The preferred non-woven webs of the present invention exhibit a high extension capacity and preferably allow that the individual fibers are stretched such that the bonds between the fibers are not substantially fractured or ro In this manner, the belt layers are most preferably highly non-extensible non-woven webs which will generally elongate more uniformly with minimal tearing due to localized stress occurring compared to typical non-woven webs consisting of less stretchable fibers. Examples of nonwoven webs include spunbond plies of polyethylene fibers or mixed with polyethylene. More preferably, the belt layers are made from a weft bonded web of fibers made of polyethylene, polyethylene polymer blends or polyethylene / polypropylene polymer blends. Exemplary spunbond woven webs of polyethylene fibers for use as belt layers are available as No.87257 manufactured by Polybond Co. of Waynesboro, Virginia; as COROLIND 17184 manufactured by Corovin de Peine, Germany; or as Fiberweb E1004204 manufactured by Fiberweb of Simpsonville, S.C. The belt 38 is elastically extensible in the side panels 64 and 64 'to provide a more comfortable and contour fit by initially initially comfortably fitting the diaper that is pulled to the wearer and holding this adjustment throughout the time of use when it has been loaded with exudates distributing the forces along both the waist and the legs since the sides of the diaper being pulled can preferably expand or contract in a direction having a vector component in the lateral direction, more preferably in the lateral direction, to provide the improved fit. It should be noted, however, that the panels can be extendable in any other direction or in more than one direction. In addition, the side panels may have one or more discrete areas of extension capacity. The elastic extension capacity of the side panels can be provided by a number of different materials and configurations. The different components of the belt (for example, the belt layers or the frame layer) may comprise conventional elastic materials, or the side panels of the belt may be constructed from a number of different elastic laminated structures. For example, the side panels of the belt may comprise an elastic material operably linked to one or more non-elastic components (the belt layer or the frame layer or both) in an elastically contractible condition as described in the United States patent. United 3,860,003 entitled "Shrinkable side portions for a disposable diaper", issued to Buell on January 14, 1975, which is incorporated herein by reference. Alternatively, the side panels may comprise a film web in structural elastic form, such as described in WO 95/03765"Screen materials exhibiting a performance in the form of elastics", The Procter & Gamble Company, published on February 9, 1995, which is incorporated herein by reference. Although the side panels of the belt can be constructed from a number of different stretchable or elastic materials as is known in the art, one or more, and preferably each of the side panels of the belt are constructed of a stretch laminate. In the embodiments shown in Figures 1 to 4, the stretch laminates (front stretch laminates 46 and back stretch laminates 48) are unitary elements of the pulled diaper, ie, they are not separately handled items secured to the diaper that is pulled, but instead are formed from and are extensions of one or more of the different layers (at least the belt layer, preferably also the diaper frame layer that is pulled). In a preferred embodiment, each stretch laminate is formed by a portion of the frame layer, a portion of the respective belt layer, an elastic panel member positioned between the frame layer and the belt layer and a portion of the belt layer. barrier layer. In a preferred embodiment of the present invention, an elastic panel member 78 is operatively attached to the side panel, preferably between the frame layer and the belt layers, to allow the stretch laminates to be elastically extensible in at least the lateral direction. As used herein, the term "elastically extensible" means a segment or portion that will elongate in at least one direction (preferably the lateral direction for the side panel), when the tension forces (typically lateral tension forces for the side panel) are applied, and will return to approximately its size and previous configuration when the tension forces are removed. The elastomeric materials that have been found to be especially suitable for use as the elastic panel members (especially for zero tension stretch laminates) are the elastic films based on styrene block copolymer preferably with a thickness of 0.05 mm to 0.0564 mm. , as done by Clopay Corporation of Cincinnati, Ohio under the designation PA182870; or the Exxon 500 series elastic films from Exxon Chemical of Baytown, Texas. A stress / strain graph (extension force) of the elastomeric material P18-2870 described above is shown in Figure 12. The stress / strain graph shows the typical shape of the force curve in grams per one inch of sample width when subjected to a tension or extension applied at a rate of 50.8 cm / min at approximately 23 ° C (room temperature) . Other materials suitable for use as the elastic panel members include "live" or natural synthetic rubber other natural synthetic rubber foams, elastomeric films (including heat shrinkable elastomeric films) elastomeric woven or nonwoven webs, certain cotton or linen fabrics, mixed materials elastomeric or similar. In an especially preferred embodiment, the elastic panel members are operatively joined to the side panel by securing them to the frame layer, the belt layer or both, while they are in a substantially unstressed condition (zero stress). At least a portion of the resultant composite stretch laminate containing the elastic panel member is then subjected to sufficient mechanical stretching to permanently elongate non-elastic components, (the frame layer, the barrier layer, and the barrier layer). belt) of the stretch laminate. The mixed stretch laminate is then allowed to return to its substantially unstressed condition. The side panel is thus formed in a "zero stress" stretch laminate (alternatively the elastic panel member can be operatively joined in a tensioned condition and then subjected to mechanical stretching, although this is not as preferred as a laminate "Zero-tension" stretching machine As used herein, the term "zero-tension" rolling laminate refers to a laminate comprised of at least two sheets of material that secure one to another of at least one portion of its coextensive surfaces while in a substantially unstressed condition ("zero stress"), one of the sheets comprising a material that is stretchable and elastomeric (i.e. will return substantially to its unstressed dimensions after a release has been released). applied tensile force) and a second blade that is stretchable (but not necessarily elastomeric) in such a way that when stretching the second blade will be, so less to a permanently elongated degree, in such a way that when releasing the applied tension forces it will not completely return to its original configuration without deforming.
The resulting stretch laminate is thus made elastically extensible, at least up to the initial stretch point, in the direction of initial stretch. Particularly preferred methods and apparatus used to make the stretch laminates use gear-type corrugating rollers to mechanically stretch the components. Particularly preferred apparatuses and methods are disclosed in U.S. Patent 5,167,897 issued to Weber et al. On December 1, 1992, U.S. Patent 5,156,793 issued to Buell et al., October 20, 1990.; and U.S. Patent 5,143,679, issued to Weber et al., September 1, 1992; each of which is incorporated herein by reference. The elastic panel members in the stretch laminate can be operatively joined to the frame layer, the belt layers, or both, using either an intermittent joint configuration or a substantially continuous joint configuration. As used herein, a "intermittently" bonded laminated weft means a laminated weave wherein the sheets are initially joined to each other at separate, discrete, separate points, or a laminated weft where the sheets are being substantially joined to one another in separate, discrete areas. Conversely, a laminated web attached "substantially continuously" means a laminated web wherein the webs are initially substantially continuously bonded to one another along the entire length of the interlock areas. Because it is preferred that the stretch laminate is primarily attached to a significant portion of the stretch laminate, such that inelastic wefts (belt layers, frame layer, and barrier layers) elongate or stretch without causing breakage, and the layers of the stretch laminates are preferably bonded in a configuration that keeps all layers of the stretch laminate in relatively close adhesion to one another after the incremental stretch operation, the elastic panel members and the other The sheets of the stretching lamellate are joined substantially continuously together using an adhesive. In a particularly preferred embodiment, the selected adhesive is applied in a spiral pattern (as shown in U.S. Patent 3,911,173 (Sprague, Jr.) and U.S. Patent 4,842,666 (Werenicz) in a US Pat. basis weight of approximately 0.00116 grms / cm2 The spirals have a width of approximately 1.9 cm and are placed either exactly adjacent to each other or slightly overlapped (less than 2 mm) The adhesive is preferably an adhesive such as one available from Findley Adhesives under the designation H2120. Alternately, the elastic panel member and any other component of the stretch laminates may be intermittently or continuously joined to the other using heat-bonding, pressure-bonding, ultrasonic bonding, dynamic-mechanical bonding. or any other method as is known in the art, it has been found that the extension characteristics including the extension forces n as the extension module and available stretch (extension), and contractive forces and rate of contraction or regime stretch laminates are important considerations in the performance of both the stretch laminates as the diaper is pulled. The extension properties and the configuration or adjustment forces give the applicator and the user the total "perceived elasticity" during use. They also effect the ability of the applicator to achieve an adequate degree of stretch application (i.e., for a "normally" perceived diaper tension during application, the total amount of the resulting stretch is that desired to achieve / maintain good compliance of adjustment). A stretch laminate with a relatively high modulus / extension force may cause red marking on the user's skin, while a relatively low modulus / force may cause buckling / sliding on the user. Stretch laminates that have very little stretch available can not achieve an adequate level of compliance to the body, and can contribute to making the diaper uncomfortable for the user and difficult to place. The stretch laminates with very low contractive forces (or excessive elastic shift, excessive relaxation of the elastic force, or excessive "inelastic" placement), may not remain in place on the user and may tend to buckle / slip over the user, resulting in poor fit and containment. For the stretch laminates of the present invention, it has been found that the extension characteristics of the force and extension module are preferably within the defined scales. Figure 13 shows an extension / strength response curve for two extension / recovery cycles in a stretch laminate (without vent holes) preferred of the present invention. The sample stretch laminate is subjected to an initial pull or extension at a rate of 50.8 cm per minute at approximately 23 ° C and maintained for 30 seconds at 200% extension. The sample is then allowed to relax to the same regime. The sample is allowed to remain unrestricted for one minute before being subjected to a second traction or extension to the same regime and conditions. The initial tensile extension force is preferably greater than or equal to about 100 grams per inch at 100% extension. More preferably, the initial tensile extension forces are between about 150 to about 200 grams per inch, most preferably between about 160 grams per inch and 200 grams per inch at 100% extension to improve fit to the user. At 200% extension, the initial tensile strengths are preferably between about 200 grams per inch and about 400 grams per inch, more preferably between about 200 grams per inch and about 300 grams per inch. The second cycle recovery forces of the stretch laminates within the use scales (20% to 140% extension are preferably between about 25 grams per inch and about 200 grams per inch of recovery, more preferably between about 60 grams per inch. inch and approximately 250 grams per inch, these values correspond to the forces of nominal use after extension and recovery.The force wall is that portion of the extension curve where the forces with the extension increase develop more rapidly. The wall of force allows the additional traction force to be developed without the extra stretching of the belt, which results in the garment being easier to put on, especially for self-application.The wall of force is achieved at forces greater than 400 grams per inch.
Thus, for stretch laminates, an incremental increase in the extent of 50% or less beyond the desired maximum design extent produces a force above 400 grams per inch. As shown in Figure 14, the strength wall of the stretch laminate is typically achieved to more than about 200% extension (the maximum desired design extension of this stretch laminate.) An increase in extension of 50% from 200. % up to 250% extension produces a force greater than 400 grams per inch.The available stretch measures the maximum amount of material available in the stretch laminate to reverse stretch to shape the user's body during use. Stretch available in relation to the maximum amount of extension that the diapering person has available to adjust the diaper to the user In addition, the maximum amount of recoverable extension available from the diaper to access the user's body. from the equation: ((stretched length - original length) / original length) X 100. The minimum quantity d The available stretch required for the application of the diaper using the stretch laminates is preferably an available stretch of at least about 75%, preferably, at least 100%, with stretch available preferably on the 100% scale, 250% , most preferably about 200%. The continuous belt 38 is also preferably elastically extensible in the center panel, preferably at least in each waistband panel 60 and 60 ', longitudinally outwardly from the absorbent core. The elastic extension capacity is provided by an elastic waist feature 50. The elastic waist feature 50 provides a member that is elastically extensible, preferably elastically contractible in at least the longitudinal direction to provide a portion of the continuous belt comprising the stretch laminates of the side panels and the elastic waist features in the waistband panels to dynamically adjust and conform to the wearer's waist to provide the adjustment improved. The elastic waist feature is generally that portion of the belt extending from the extreme edge toward the edge of the absorbent core. The elastic waist feature is preferably elastically contractible for the purpose of picking the waistband panel longitudinally outward from the absorbent core toward the used part of the garment fit on the center panel to better fit the wearer. The elastic waist feature 50 comprises an extension of at least the belt layers (the first belt layer 42, or the second belt layer 44) and, preferably one of the other elements of the pulling diaper such as the layers. of frame 40 or top sheet 80 or any combination of these elements, alone (if one of these layers are extensible or shrinkable) or with an elastic material bonded thereto. The elastic waist feature 50 can be constructed in a number of different configurations including those described herein with respect to the stretch laminates, those of the elasticized waistbands as are known in the art and as described, for example, in U.S. Patent 4,515,595 entitled "Disposable diapers with elastically shrinkable waistbands", issued to Kievit and Osterhage on May 7, 1985, and United States patent 5,151,092 entitled "Absorbing article with elastic waist feature, dynamic that has a predisposed elastic flexion joint "issued to Buell, Clear and Falcone on September 29, 1992; and elasticized waistbands made from a film web in the form of SELF structural elastic, as described in the aforementioned WO 95/03765; each of which is incorporated herein by reference. In a preferred embodiment of the present invention as shown in Figure 4, the elastic waist feature 50 preferably extends fully through the waistband panels 60 and 60 ', and towards the side panels 64 and 64'. Preferably, the elastic waist feature 50 extends fully through the side panels 64 and 64 'to the seam panels 66 and 66'. The elastic waist feature may also extend towards one or both of the seam panels 66 and 66 ', to provide an elastic waist feature 360. Extending the elastic waist feature 50 at least toward the side panels 64 and 64', provides the user with additional grip material when the garment is applied. The transition between the side panel material and the waist / side panel laminate creates a point of articulation / break, which allows the waist portion of the side panel to double around the consumer's fingers, creating a handle for the application.
This makes the application easier, since the product does not slip out of the consumer's hands when the garment is pulled. In addition, the increased caliper and elasticity created by the elastic waist feature 50, provides improved fit. The elastic waist feature 50 preferably comprises a waistband / unitary waistband 82 positioned on the top sheet 80 and operatively joined in an elastically contractible condition with the top sheet 80 for collecting the waistband panel 60 or 60 'of the diaper 20 that is pull. Since the elastic waist feature 50 is operatively linked in an elastically collapsible condition to pick up the waistband panel 60 or 60 ', it is preferably operatively attached to the side panels 64 and 64' in a relaxed condition to allow Side panels use their full extension capacity. The waistband / unitary waistband 82 preferably comprises a laminate of a nonwoven cover layer, an elastomeric layer and more preferably a second nonwoven cover layer. An example of said unitary waistband / waistband for use herein is disclosed in U.S. Patent 5,026,364, entitled "Absorbing article having a waistband and unitary waistband", issued to Robertson on June 25, 1991; and which is incorporated herein by reference. The elastomeric layer is stretched to at least about 50% pre-stress, preferably between 100% and 300% pre-stress, most preferably about 250% pre-stress. Materials that have been found to be suitable for use as the elastomeric layer include synthetic or natural "loaded" rubber, other synthetic or natural foams, elastomeric films (including elastomeric films capable of heat finding), elastomeric fabrics or non-woven fabrics. woven, elastomeric canvases, elastomeric filaments, elastomeric composite materials or the like. When operatively attached to the topsheet in the central panel of the pulling diaper, the waistband / unitary waistband in combination with the underlying layers of the pulled diaper provide extension forces, when stretched to 67% (a inch in this particular embodiment) of extension, preferably between about 100 grams per inch and 300 grams per inch, more preferably between about 150 grams per inch and about 200 grams per inch. The unitary waistband / waistband in this preferred embodiment also provides at least 19mm of contraction (i.e., 38mm of contraction in the total product), to provide a thinned fit in the upper part of the pulled diaper. In a particular embodiment, the unitary waistband / waistband is breathable to allow water vapor to escape from the front region and the back region of the diaper that is pulled. Breathing capacity can be provided in the unitary waistband / waistband by selecting materials that are relatively breathable for construction and / or by drilling or making ventilation holes in the waistband / waistband as discussed herein. with respect to the stretch laminates on the side panels. In another embodiment, the unitary waistband / waistband can be hydrophobic, hydrophilic, or a hydrophobic / hydrophilic combination member. A hydrophilic unitary waistband / waistband can be used to separate moisture from the wearer's skin to prevent the skin from being hydrated. Alternatively, a hydrophobic unitary waistband / waistband can be used to prevent the liquid absorbed by the garment from flowing out through the waist opening. A hydrophobic / hydrophilic waist / waistband combination can be used to prevent the liquid absorbed by the garment from flowing out through the waist opening, while also separating the moisture from the skin of the users, to prevent the skin from hydrating. The panels 62 and 62 'located in the belt center 38 are not collected for the purpose of not bulking or binding the absorbent core 84 during use. In the embodiment shown in Figures 1 to 4, the panels 62 and 62 'which are located in the center are also preferably non-extensible to maintain the integrity of the absorbent core 84. Alternatively, panels placed in the center can be made the center elastically extensible, but not picked up, using extensible but not contracted materials to form the panel located in the center. For example, the panel in the center may comprise a zero tension stretch laminate as used herein for the side panels, or may comprise the film webs in the form of an elastic structural SELF as described in the aforementioned WO. 95/03765, which is incorporated herein by reference. If the panel in the center is made extensible it is preferred to allow the absorbent core to "float" (the absorbent core is not secured to the panel located in the center), to maintain the integrity of the absorbent core and not restrict the extension of the absorbent core. panel located in the center. The seam panels 66 and 66 'are those portions of the belt 38 designed to be sewn or joined together by the manufacturer, to form the waist opening 36 and the leg openings 34 defined. As shown in FIG. 1A, the seam panels 66 and 66 'extend laterally outwardly from the respective side panels 64 and 64', towards the side edge 72 or 72 'and generally longitudinally extend from the end edge 70 or 70 'towards the leg edge 71 or 71', respectively. The sewing panels are preferably an extension of the frame layer and other elements, such as the belt layers and the topsheet, or any other combination of these elements. In a preferred embodiment, each seam panel is formed by the portions of the frame layer, the belt layers, the elastic panel members and the barrier layers of the topsheet. (In the seam panel, the stretch laminate is preferably not activated by the mechanical stretch although it may, if desired, be provided with additional extension capacity in this region.) Referring to FIG. 1, the seams 32 are preferably form by joining the seam panels 66 of the front region 26 together with the seam panels 66 'of the back region 28. The seams of the present invention can be joined by any suitable means well known in the art, suitable for the specific materials used in the sewing panels. In this way, sonic sealing, heat sealing, pressure bonding, adhesive bonding, sewing, autogenous bonding and the like may be suitable techniques. In a preferred embodiment of the present invention, the diaper 20 is formed which is pulled overlapping the seam panels 66 of the front region 26 with the seam panels 66 'of the back region 28 to form an overlap seam. The sewing panels are preferably joined by a heat / pressure or ultrasonic welding pattern as shown in Figure 11. In this particular embodiment, the seam comprises an intermittent pattern of individual joints 1200 assembled into groups 1202. In this embodiment , the seam 32 comprises four groups 1202. Other suitable seams can have any number of groups such as two, three, five or more. The total width of the joining seam W is approximately 7 mm based on the total overlap, X, of the seam panels of approximately 11 mm. The groups 1202 are separated from each other by a distance, s, from about 6 mm to about 20 mm, preferably by about 11 mm. Each group 1202 preferably has a height, h, from about 6 mm to about 60 mm. Models, dimensions and alternate separations are also contemplated. The spacing between the adjacent groups 1202 creates spaced portions or portions in the seam 32. When the garment 20 is worn, the seams 32 tend to buckle with the movement of the wearer. The buckling of the seams 32 in the spaces between the adjacent groups creates channels that allow air to move in and out of the garment during use to ventilate the garment. In this way, the disjointed portions of the seam 32 (i.e., the sum of all the individual separation distances, s), determines the breathing capacity of the seams, and therefore, the breathing capacity of the garment. Since the disjointed portions of the seams 32 increase the breathing capacity of the garment in such a way. However, since the disengaged portion of the seam increases, the strength of the seam 32 decreases. Preferably, the disconnected portion of the seam varies from about 20% to about 65% of the total length of the seam, as measured from the leg opening 34 toward the waist opening 36, along the seam 32. Examples of suitable seams have a disjoint portion comprising about 30%, 35% or 40% of the total length of the seam. Unbalanced portions below 20% are not desired, since you are not allowed to enter a sufficient amount of air to vent the garment. Unbalanced portions above 65% are not desired, either as they allow sufficient amounts of air to vent the garment, but not strong enough to withstand the high forces and stresses placed on the garment during use. The groups adjacent to the leg openings 34 have a greater height, h, of all the groups. Preferably, this group has a height, h, of at least about 20 mm, preferably from about 30 mm to about 40 mm This configuration helps to minimize the buckling of the seam 32 adjacent the leg opening 34, thus reducing the marking of the skin on the user. Preferably, there is also a group located adjacent to the waist opening 36. This group creates a line of tension around the waist, providing improved fit and containment of the garment. The groups adjacent to the leg opening 34 and the waist opening 36, can be spaced apart from the leg opening 34 and the waist opening 36, by a small distance, for example, less than about 5 mm. With the fusion of the first belt layer 42, a portion of the frame layer 40, a portion of the elastic panel member 78 in the side panels of the front region, a portion of the barrier layer 88, the second layer of belt 44, a second portion of the frame layer 40, a portion of the elastic panel member 78 'on the side panels of the rear region, and a second part of the barrier layer 88, the seam 32 is very strong and not will tear or tear during the application or use of the diaper 20 that is pulled. A potentially strong seam can be produced by increasing certain amounts of the polymeric material in the seam panels. The amount of the polymeric material in the seam panels can be increased by using higher basis weight nonwoven materials, thicker plastic films, or by introducing additional layers of materials to the seam panels. For example, plastic films or additional nonwoven webs may be attached to the sewing panels. Alternatively, the layers forming the diaper can extend beyond the intended seam area and unfold back toward the seam panel to introduce additional layers into the seam panels. Examples of these types of sewing are discussed in the aforementioned US Pat. No. 5,236,430. In addition to the continuous belt 38, the diaper 20 that is pulled comprises a frame assembly (a main panel 46 and leg flap panels 58) that extend between the user's legs to thereby define the crotch region 30. crotch region 30 typically comprises at least one outer layer of cover, preferably also an absorbent core 84. In the embodiment shown in FIGS.
Figures 1 to 4, the outer cover layer comprises a frame layer 40 and the top sheet 80. The frame assembly preferably further comprises the features of elastic leg 52. The elastic leg features 52 provide improved containment of liquids and Other body exudates within the crotch region at 30 and around the leg openings in general. Each elastic leg feature 52 may comprise several different embodiments to reduce runoff of the body exudates in the leg flap panels 58 (the elastic leg feature may be and is sometimes also referred to as leg bands, side flaps, barrier folds or elastic folds). U.S. Patent 3,860,003 entitled "Shrinkable side portions for a disposable diaper", issued to Buell on January 14, 1975, discloses a disposable diaper that provides a collapsible leg opening having a side flap and one or more limbs. Elastic panel to provide an elasticized leg fold (fold of packing). U.S. Patent 4,909,803 entitled "Disposable Absorbent Article Having Elasticized Fins", issued to Aziz and Blaney on March 20, 1990, discloses a disposable diaper having "upright" elasticated fins (barrier folds) to improve containment of leg regions. U.S. Patent 4,695,278 entitled "Absorbent Article Having Double Folds," issued to Lawson on September 22, 1987, describes a disposable diaper having double folds that include a gusset fold and a barrier fold. U.S. Patent 4,795,454, entitled "Absorbent article having double folds resistant to runoff and leakage" issued to Dragoo on January 3, 1989, discloses a disposable diaper having dual leak-resistant folds wherein the top sheet is stop before the side edge of the diaper to prevent the passage through the wick effect towards the side of the garment. Each of these patents is incorporated herein by reference. Although the elastic leg feature can be configured to be similar to any of the leg bands, side flaps, barrier folds or elastic folds described above, it is preferred that each elastic leg feature comprises a combination of a gusset fold and an elastic leg feature. barrier fold. The packing gusset and the barrier folds are preferably formed as shown in the United States Dragoo patent and as discussed herein. In an alternate embodiment of the present invention, the leg flap panels 58 may further comprise a film web in the form of an elastic structural SELF as described in the aforementioned WO 95/03765. The SELF weft of the leg flap panels provides extension capacity in the lateral direction. By providing a SELF web, proximate to, on or off the elastic leg members forming the packing fold, the diaper that is pulled with an area adjacent to the legs that can be expanded when needed by an additional hollow volume is provided. Due to a heavy load and also to provide a comfortable fit to reduce the possibility of leakage or leakage in the leg regions due to separation. As the diaper is loaded and becomes heavier, the force of the weight causes the expandable leg flap panels to expand to the lateral direction thereby reducing the separation in the legs due to this expansion rather than being pulled the folds down by the weight and the separation away from the leg. The result is that the action of the packing fold is independent of the absorbent core thus providing improved fit and containment. Additionally, the SELF weave increases the softness of the product in the packing fold and contributes to the general aesthetics of the baby. In fact, the main panel may, if desired, comprise an SELF frame to provide softness and containment characteristics.
Alternatively, the leg flap panels may comprise a SELF weft or a mechanically stretched laminate that is extensible in the longitudinal direction to allow extension of the leg openings in the longitudinal direction thereby fitting the user having legs longer The absorbent core 84 is preferably positioned adjacent the inner surface 76 of the frame layer 40, and is preferably bonded thereto by joining means (not shown), such as those well known in the art. For example, the frame layer can be secured to the absorbent core by a continuous uniform adhesive layer, a patterned adhesive layer, or an array of separate lines, coils or dots of adhesives. The adhesives that have been found to be satisfactory are manufactured by Findley Adhesives of Wauwautosa, Wisconsin, and marketed as Findley H2120. The attachment means preferably comprises a network of adhesive pattern filaments as disclosed in U.S. Patent 4,573,986 entitled "Disposable garment for containment of garbage" which was issued to Minetola and Tucker on March 4, 1986, and which is incorporated herein by reference. An exemplary attachment means of an open-pattern filament network comprises several lines of adhesive filaments twisted in a spiral pattern as illustrated by the apparatus and methods shown in United States Patent 3,911,173 issued to Sprague, Fr. On October 7, 1975; U.S. Patent 4,785,996 issued to Ziecker, and others on November 22, 1978; and United States Patent 4,842,666 issued to Werenicz on June 27, 1989. Each of these patents is incorporated herein by reference. Alternatively the joining means may comprise heat bonds, pressure joints, ultrasonic joints, dynamic-mechanical joints or any other suitable joining means or combination of these joining means as are known in the art. The absorbent core 84 may be any absorbent means that is generally compressible, conformable and non-irritating to the wearer's skin, and capable of absorbing and retaining liquids such as urine and other certain exudates from the body. The absorbent core can be manufactured in a variety of sizes and shapes (eg, rectangular, hourglass, asymmetric "T" shape, etc.), and from a wide variety of liquid absorbent materials commonly used in diapers disposable and other absorbent articles such as crushed wood pulp which is generally referred to as an air filter. Examples of other suitable absorbent materials include accreted cellulose wadding, melt-blown polymers, including coform, cross-linked cellulosic fibers, paper including paper wraps, absorbent foams, absorbent super absorbent polymer sponges, gelling absorbent materials or any equivalent materials or combinations of materials. The configuration and construction of the absorbent core can also be varied (for example, the absorbent core can have variable gauge zones and hydrophilic gradients, super absorbent gradients, or base weight acquisition zones by lower means and lower average density, or can comprise one or more layers or structures). The total absorbent capacity of the absorbent core, however, must be compatible with the design load and intended use of the diaper that is pulled. In addition, the size and absorbent capacity of the absorbent core can be varied to encompass users ranging from babies to adults. A preferred embodiment of the absorbent core has a modified, asymmetric hourglass shape and has a body surface towards the user's body (internal surface) and a garment surface opposite the body surface. An exemplary absorbent structure for use as the absorbent core of the present invention which has achieved wide acceptance and commercial success is described in US Pat., 360,420 entitled "Absorbent structures containing hardened fibers and super absorbent material" issued to Cook, Lash, Moore, and Young on November 1, 1994. These references are incorporated herein by reference. Preferably, the absorbent core will comprise an acquisition / distribution layer of chemically hardened cellulosic fibers and a storage layer positioned below the acquisition / distribution layer comprising a mixture of wood pulp fiber and super absorbent material, as disclosed in U.S. Patent 4,610,478 entitled "High Density Absorbing Structures", issued to Weisman and Goldman on September 9, 1986, and incorporated herein by reference. The topsheet 80 is positioned adjacent to the body surface of the absorbent core 84 and is preferably attached to the absorbent core 84 and to the frame layer 40 by attachment means (not shown), such as those well known in the art. Suitable attachment means are described with respect to the attachment of the absorbent core to the frame layer. As used herein, the term "attached" encompasses configurations with which one element is directly secured to the other element by attaching the element directly to the other element and configurations with which the element is indirectly secured to the other element by attaching the element to the member or intermediate members which in turn are fixed to the other element. In a preferred embodiment, the top sheet and the frame layer are indirectly joined together by attaching them directly to the absorbent core or to the elastic panel members or other diaper elements that are pulled. The topsheet 80 preferably comprises a 3-member structure as disclosed in U.S. Patent 4,795,454 entitled "Absorbent article having dual folds resistant to leakage" issued to Dragoo on January 3, 1989, which enter here for reference. As shown in Figure 4, the topsheet 80 comprises a primary layer 86 and barrier layer 8 8 joined to and extending laterally outwardly from the primary layer 86. The primary layer 86 is a liquid permeable material that allows liquids penetrate quickly through its thickness and be absorbed by the absorbent core. The two barrier layers 88 are preferably hydrophobic to prevent runoff away from the sides of the diaper, and are preferably stretchable to strengthen the stretch laminates. The primary layer 86 is preferably docile, of soft feel and non-irritating to the wearer's skin. The primary layer is permeable to liquid allowing liquids (eg, urine) to easily penetrate through its thickness. A suitable primary layer can be manufactured from a wide range of materials, such as porous foams; cross-linked foams; plastic films with apertures or three-dimensional expanded formed films; or woven nonwoven webs of natural fibers, synthetic fibers or a combination of natural and synthetic fibers. Preferably, the primary layer is manufactured by Fibertec, Inc. of Landisville, N.J. under the designation 6701. In the embodiment shown in Figure 3, the primary layer 86 is preferably not coextensive with the frame layer, such that the liquid will not pass through the wick along and through the primary layer toward the edges of the diaper being pulled, so that the liquids will not undergo wicking under and beyond the raised barrier folds formed by the barrier layers, and in such a way that more stretch material can be placed in the side panels to produce stronger stretch laminates. The primary layer preferably lies on a larger portion of the body surface of the absorbent core, more preferably the entire body surface area of the absorbent core in at least the crotch region such that exudates are discharged into the diaper that It is pulled through the primary layer where they are absorbed by the absorbent core. The primary layer extends laterally outward towards the lateral edges of the absorbent core, preferably beyond the side edges of the absorbent core in at least the crotch region. However, the primary layer terminates inwardly of the leg edges of the crotch region. In highly preferred configurations, the primary layer terminates adjacent the proximal edge of the barrier layer (i.e. the terminal edge of the primary layer is positioned adjacent the proximal edge) or the terminal edge is positioned far from and toward the center of the border next. Adjacent is used in this context to imply that the primary layer ends at the near edge plus or minus two small areas of the primary layer material that may extend into or beyond the near edge due to the tolerances of the machine during manufacture or the variations in the area of the primary layer when it is manufactured. In the preferred embodiment of the topsheet 80 shown in Figure 3, the barrier layers 88 form the elastic leg features 52 (preferably a gusset fold and / or a barrier fold), and preferably, a portion of the laminates. of stretching. In order to form the elastic packing / barrier fold leg characteristic as shown in Figure 3, the barrier layer 88 preferably has a fin portion 90 and a portion (upright channel 92). The upstanding portion 92 has a proximal edge 95 and a distal edge 95 '. Although the fin portion 90 is preferably a continuous segment of the barrier layer 88, the fin portion 90 can be formed from a piece of different material secured to the upstanding portion 92, such that the fin portion 90 In fact, the fin portion, or the upright portion can be omitted entirely from the diaper if desired. The upstanding portion 92 forms and defines the flap of the barrier fold as described in U.S. Patent 4,795,454 (Dragoo). The proximal edge 95 of the upstanding portion is preferably disposed between the elastic leg members 96 and the longitudinal centerline, most preferably between the elastic leg members 96 and the lateral edge of the absorbent core 84 in at least the crotch region 30. , to create a stamp along the near edge. Distant edge 95 'is preferably not secured to any underlying diaper element that is pulled in at least crotch region 30, to form the raised barrier fold. The ends of the upstanding portion are preferably attached to the underlying structure of the pulled diaper, the primary layer, by means of closure 98, such as any of the joining means described herein, to increase the upright function of the folds. of barrier. The upstanding portion 92 of the barrier layer 88 is thus hydrophobic preferably to reduce leakage of exudates from the diaper being pulled. In a preferred embodiment of the present invention, at least some segment of the fin portion 90 of the barrier layer 88 in the front region 26 and in the rear region 28, is subjected to mechanical stretching for the purpose of providing the stretch laminates in the side panels 64 and 64 'respectively. In this way at least the fin portion 90, preferably the total barrier layer 88, is stretchable, more preferably stretchable (but not necessarily elastomeric) in such a way that the barrier layer, upon mechanical stretching, will be at least a permanently elongated grade such that it will not fully return to its original configuration. In especially preferred embodiments, the barrier layers can be mechanically stretched without undue rupture or tearing. In this way, the barrier layers are preferably stretchable, more preferably stretchable, and most preferably hydrophobic materials. Suitable materials for barrier layers include many of the layers suitable for belt layers. A preferred material for the barrier layers comprises a web of polyethylene fibers or mixed with polyethylene, linked by spinning. A suitable material for the barrier layer is the spunbond polyethylene fiber web manufactured by Fiberweb, N.A. from Simpsonville, N.C. under the designation E1004203. The diaper 20 that is pulled can also be preferably provided with ventilation holes or openings to allow air and water vapor to pass to and from the interior of the pulled diaper. In a preferred embodiment, the openings are placed in the side panels. In this configuration, the exudates are prevented from leaving the areas adjacent to the absorbent core, however, it is allowed to exchange the air and water vapor inside the product to ventilate it in such a way that the product does not become excessively dampened for the perspiration of the body and uncomfortable for the user. Ventilation holes may additionally be provided in other panels of the product being pulled or in certain of the characteristics of the diaper being pulled. For example, ventilation holes may be provided in the waistband panel in the front region or in the back region to provide ventilation and breathability of the waistband regions and / or the ventilation holes in the cover may be provided. Waist / unitary waistband to also increase ventilation in the product. The diaper that is pulled preferably would have a plurality of ventilation holes within the side panels, the ventilation holes being arranged in a defined pattern of large and small openings. The openings are generally in the range of approximately 0.3-2.5 in diameter, with the largest openings being preferably in the range of approximately 1-2 mm and the smallest openings being in the range of approximately 0.5-0.9 mm in diameter. The openings in the fabric or forming holes can be formed by autogenous bonds such as ultrasonic techniques or thermal / pressure techniques. Said apertures and forming techniques are described in U.S. Patent 2,544,069 issued to Cutler on March 6, 1951; and U.S. Patent 4,834,738 issued to Kielpikowski et al. on May 30, 1989; each of which is incorporated herein by reference. Preferably the openings extend through all the layers of the product, all of the layers of the stretch laminates in the side panels, such that the ventilation holes extend from the inside out of the product. Alternatively, the ventilation holes may only be made in one or more of the layers, or these may comprise slits or cuts instead of holes.
Breathing capacity can be provided in an alternating manner by making diaper materials that are pulled out of air or steam permeable materials as is known in the art. For example, the frame layer may comprise a breathable plastic film (vapor permeable) but impermeable to liquid. The elastic panel members may be of open material such as foams, certain linen or cotton fabrics, nonwoven webs, or breathable elastomeric films to further increase the breathing capacity of the diaper that is pulled. The diaper 20 that is pulled out of the present invention can be applied by a caregiver or self-applied by the user. Typically, the waist opening 36 will be expanded to allow the user to insert one of their feet into one of the leg openings 34. The other foot is then inserted into the other leg opening 34, the diaper 20 being pulled is then pulled up above the user's torso in its position of use. The wall of force created by the stretch laminates helps especially in the self-application of the diaper that is pulled by forcing the product that is pulled up over the buttocks instead of expanding further. The diaper that is pulled is then used and can contain and maintain discharged body exudates. The diaper that is pulled is removed from the wearer either by pulling it down or over the legs or by tearing the portion of the diaper that is pulled adjacent to the seams. Figure 5 shows a cross-sectional perspective view of an alternative embodiment of the diaper that is pulled from the present invention. As shown in the Figure 5, the frame layer 540 forms the inner surface 24 of the diaper 520 that is pulled. The frame layer 540 thus serves as the top sheet. For this reason, in this embodiment, the frame layer 540 preferably comprises a non-woven web permeable to liquid. The frame layer 540 is preferably of nonwoven material discussed hereinabove with respect to the formation of the primary layer of the topsheet. The first belt layer 542 is positioned adjacent the outer surface 577 of the frame layer 540. The second belt layer not shown is also positioned adjacent the outer surface of the frame layer. Additionally, a backsheet core layer 510 preferably comprising a liquid impervious plastic film is placed on the outer surface of the frame layer. Additionally, a backsheet core layer 510, comprising a plastic film impervious to liquid, is placed on the inner surface on the first belt layer 542, on the outer surface 577 of the frame layer 40 to act as a backsheet for the diaper that pulls. The elastic panel members 78 are placed between the frame layer 540 and the first belt layer 542, to form the front stretch laminates. The absorbent core 84 is preferably placed on the outer surface 577 of the frame layer 540, preferably between the frame layer 540 and the center frame layer 510. The barrier folds 514 of the elastic leg feature preferably comprise a strip of fabric. relatively narrow material (a barrier fin), attached to the inner surface 576 of the frame layer 540, as shown in the aforementioned US Pat. No. 4,695,278 to Lawson. The fins of the barrier folds can comprise a nonwoven web, a plastic film, or a laminate of a non-woven web and a plastic film. As shown in Figure 5, the stretch laminates additionally comprise a reinforcing layer 512 preferably placed between the frame layer 540 and the elastic panel member 78. The reinforcing layer 512 acts to "reinforce" the tension of the stretch laminates to allow deep mechanical stretching (tightness of the stretch laminate without creating local tears or holes in the stretch sheet. As discussed above, some materials are more able to undergo stress than other materials, especially in the high stress forces encountered by the mechanical stretching operation done on the stretch laminates.Thus, the joining of a more capable material to undergo stress with a material that is less able to be stressed results in a combination of laminate that will be subjected to stress at that high degree without undue tearing or tearing of the materials.This is especially important in the present embodiment where the frame layer 540 comprises a non-woven fabric, since the frame layer 540 acts as The upper sheet of the pulling diaper 520, the frame layer 540 will typically comprise a non-woven material that is readily permeable to liquid but is not generally as stretchable as other non-woven materials. In this way the frame layer 540 of this embodiment will tend to tear or tear when subjected to the mechanical stretching operation to form the stretch laminates. The reinforcement layer 512, which is a material more capable of stretching than the frame layer 540, when laminated to the frame layer 540 before mechanical stretching, bypasses, or extends the tears in the frame layer 540 to allow that the stretched laminate generally does not fail or has no holes during use. The reinforcement layer 512 can thus comprise a number of materials that are stretchable to provide the necessary strength in the stretch laminate. Examples of such reinforcing layers include plastic films, plastic films with openings such as DRI-WEAVE marketed by The Procter & amp;; Gamble Company or non-woven wefts. Preferably for the purpose of providing the breathing capacity of the stretch laminates, the reinforcing layer comprises a plastic film with openings or a non-woven material. More preferably, the reinforcing layer comprises those nonwoven webs useful as the belt layers and which are described herein. As discussed above, the reinforcing layers are preferably placed adjacent to the weaker layers to provide them with strength. In the embodiment shown in Figure 5, the reinforcing layer 512 is preferably placed on the outer surface 577 of the frame layer 540, although it can be placed on the inner surface of the frame layer 540 if desired. Additional reinforcing layers can be provided in the stretch laminates and collocated adjacent to any of their elements. Figure 6 shows an alternative embodiment of the diaper that is pulled shown in Figure 5. The frame layer 640 functions as the top sheet. The first belt layer 642 is placed on the outer surface 677 of the frame layer 640, preferably directly adjacent to the frame layer 640 in the center panel. The elastic panel members 78 are placed between the first waist layer 642 and the frame layer 640 on the side panels. In this way, a continuous belt is formed without the intervention of elements. In this way the forces around the waist opening can be distributed and transmitted continuously. A backsheet core layer 610 is placed on the outer surface 612 of the first belt layer 642, and forms the outer surface 22 of the diaper 620 that is pulled in the crotch region and in the center panel of the front region and the front panel. later region. The absorbent core 84 is positioned between the backsheet core layer 610 and the first belt layer 642. Since the first belt layer 642 extends over the surface of the absorbent core 84, the first belt layer 642 is preferably also permeable to liquid. The first belt layer 642 may thus comprise the spunbond polyethylene fiber nonwoven material previously discussed herein; however, it becomes sufficiently fluid permeable such as by adding a suitable surfactant. One or more reinforcement layers may also be placed on the side panels to prevent undue tearing or tearing of both the frame layer 640 and the first belt layer 642.
Figure 7 is a perspective cross-sectional view of a further alternate embodiment of the diaper that is pulled shown in Figure 5. In this embodiment, the absorbent core 84 is positioned between the frame layer 740 and the first belt layer 742 Since the first belt layer 742 needs not to be liquid permeable as it is placed on the garment surface of the absorbent core 84, the first belt layer 742 is preferably stretchable and comprises the materials previously described herein for use as the layers of belt. The backsheet core layer 710 is placed on the outer surface 712 of the first belt layer 742 to form the outer surface 22 of the diaper 720 that is pulled in the crotch region and in the center panel of the front region and region. later. A reinforcement layer may also be placed between the frame layer 740 and the elastic panel member 78 to reinforce the frame layer 740. Figure 8 is a cross-sectional view of an alternate configuration of the barrier fold of the present invention. . As shown in Figure 8, the barrier fold fin 810 comprises an upstanding portion 892 of the barrier layer 88. The barrier fold 88 has a proximal edge 895 and a distal edge 812. The proximal edge 895 is attached to the frame layer 840 to provide a seal to prevent passage through the wick and the runoff or leakage of the exudates off the sides of the leg openings. The distal edge 812 is formed by bending a portion of the barrier layer 88 on itself and around the elastic separation members 94. The elastic separation members 94 are operatively bonded to the fin, the barrier layer 88, at a elastically contractible condition adjacent to said distant edge 812 to cause the distant edge 812 to rise away from the primary layer 86. A containment layer 814 is attached to the fin, the barrier layer 88. The containment layer 814 is preferably a film impermeable to the liquid to further prevent leakage through the barrier fold 810. The containment layer 814 preferably comprises a polyethylene film. The containment layer 814 preferably extends from exactly laterally outwardly beyond the proximal edge 895 to an intermediate point to the proximal edge 895 and to the distant edge 812. In the embodiment shown in Figure 8, the containment layer is placed between folded portions of the fin. The containment layer 814 extends beyond the proximal edge 895 to further provide an impermeable seal at the proximal edge 895. The containment layer 814 preferably does not extend to the distant edge 812 (in this embodiment approximately 6.35 mm from the distal edge) to provide a breathable portion adjacent to the distant edge 812 to maintain good skin health. In this way, the barrier fold 810 is impermeable to liquid and gas at the base of the barrier fold 810 to prevent leakage, while being gas permeable in the portion adjacent to the distant edge 812 to increase the smoothness and capacity of breathing of the barrier fold 810. A "secondary barrier" is created by a second elastic separation member 894 operatively connected with said intermediate fin to said proximal edge and said distal edge, preferably approximately 12.5 mm of the elastic separation members 94. The second elastic separation member 894 is preferably attached to the fin, between the fin and the containment layer 814. Since the containment layer is most preferably attached to the fin in separate areas apart (adjacent to the proximal edge 895 and adjacent to the folded portion of the fin), such that an intermediate portion of the containment layer is not secured to the fin, preferably the second member elastic separation is attached to the flap adjacent to this intermediate position, such that the second elastic separation member tends to separate the flap away from the containment layer 814 to form a bag. The second elastic separation member 894 thus provides a more breathable section of the flap adjacent to the body, since only the nonwoven flap makes contact with the body. The second elastic separation member 894 is operatively linked to the fin at a lower force than the elastic separation members 94 so as not to affect the functionality of the elastic separation member 94, but separates the fin away from the containing layer 814. second elastic separation member 894 is operatively bonded in an elastically contractible condition, preferably being secured only adjacent its ends such that an intermediate portion is not secured to the fin (i.e., secured in a manner to form a cord elastic as is described in U.S. Patent 4,816,025 entitled "Disposable diaper having an improved leg adjustment fold", issued to Richardson on March 28, 1989, which is incorporated herein by reference) to allow the second elastic member of separation 894 inside the fin, within the space defined by the fin and the layer of c Ontention to provide softness and flexibility as well as better breathing capacity / skin health, separating the breathable non-woven fin away from the containment layer and contact with the body. As a further preferred embodiment to the previous embodiment of the barrier fold, the height and spacing of the barrier folds can be adjusted so as to join the barrier folds to the diaper being pulled. Figure 8A shows how the barrier fold 810 can be attached to the top sheet 80, to optimize the height and separation of the fold. The inner surface of the flap is attached to the diaper, typically to the top sheet 80, at its ends laterally inwardly from the proximal edge by a first closure means 816 at about half the height of the fold (adjacent the second elastic member separation 894). Distant edge 812 is then folded laterally outward, backward toward the proximal edge such that a first barrier segment 820 and a second barrier segment 822 are formed. The outer surface of the fin in the second barrier segment 822 is attached to the outer surface of the fin in the first barrier segment 820 at the ends of the fin by a second closure means 818. The fold provides a wider bending gap and a higher bending height in the region of Crotch 30 to significantly improve performance against leaks (especially BM containment). It should be noted that the location of the second closure means 818 along the segments can be varied, the height and separation of the fold varied. The height of the fold is a particularly important parameter for garments that are pulled, because the barrier fold can cause difficulty in the application since the foot of the user can get caught in it. The height of the fold is preferably less than about 44.5 mm more preferably between about 31.75 mm and about 44.5 mm with the fold separation of the crotch region 30 which is from about 63.5 mm to about 90 mm. Figure 9 shows an alternate embodiment of the present invention in which ventilation holes 54 are provided in the side panels, and a part of the frame layer 940 ("with windows") has been removed in each waistband panel. This part of the foundation layer that has been removed for the purpose of providing increased breathing capacity in the waistband panels 60 and 60 '. The belt in the waistband panels thus comprise the respective belt layer with (first belt layer 42 or second belt layer 44)., the primary layer 86 of the upper sheet 80, and certain segments of the waist cover / waistband 82. Since the belt layer and the primary layer of the upper sheet are both preferably of nonwoven webs, the steam will be allowed of water pass between the inside and the outside of the diaper that is pulled, thereby increasing the overall breathing capacity of the diaper that is pulled. Ventilation holes 54 are similar to those previously described herein and provide increased breathing capacity in the side panels.
Figure 10 shows still another alternative embodiment of the diaper that is pulled from the present invention. The frame layer 1040 also serves as the belt layers. The frame layer 1040 also provides the outer surface 22 of the diaper 1020 that pulls on both of the front region, the back region, and the crotch region. In this embodiment, the frame layer 1040 preferably comprises a non-woven weave to give the diaper that overall pulls the feel and appearance of a cloth garment. The topsheet 80 comprises a primary layer 86 and a pair of barrier layers 88. In this embodiment, the diaper 1020 is provided which is pulled with a backsheet of mixed material that acts as the backsheet for the absorbent core 84 and as the reinforcement layers for the stretch laminates on the side panels. In this embodiment, the backsheet comprises a backsheet core layer 1002 and a pair of backsheet reinforcement layers 1004. The backsheet core layer 1002 is preferably a liquid impervious film to contain the exudates within the absorbent core. 84. However, since the backsheet core layer 1002 needs not to be subjected to mechanical stretching, this may comprise the vapor impervious liquid film, as described hereinabove to give general breathing ability to the product in the crotch region and the central panels of the frontal region and the posterior region. Since the reinforcement panels of the backsheet 1004 are mechanically stretched, they preferably comprise any of the materials suitable for use as a backing layer, as described hereinabove, including nonwoven webs or plastic films. In the illustrated embodiment, the backing layers of the backsheet 1004 comprise a plastic film, such as was used in the backing layer for the modalities of Figures 1 to 4. Although it is preferred that the backsheet reinforcement layers overlapping with and, more preferably are attached to, the backsheet center layer, the backsheet reinforcement layers may alternatively be laterally outwardly spaced from and not secured to the backsheet center layer, such that the layers Rear sheet reinforcement act as reinforcement layers and not slopes. Since both the backsheet core layer 1002 and the backsheet reinforcement layers 1004 preferably each comprise a plastic film, the layers can go together to be combined into a diaper that is pulled for ease of handling during manufacture. The elastic panel members 78 are preferably collocated between the frame layer 1040 and the backsheet reinforcement layer 1004 to provide the stretch laminates. Although particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that other changes and modifications may be made without departing from the spirit and scope of the invention. Therefore, attempts are made in the appended claims to protect all changes and modifications that are within the scope of the present invention.

Claims (10)

  1. CLAIMS 1.- A disposable, unitary pull garment comprising: (a) a frame layer comprising a continuous sheet defining below (i) a front region having an end edge, side edges, leg edges, a central panel comprising a waistband panel and a centrally located panel, the side panels extending laterally outwardly from the central panel, and a seam panel extending laterally outward from each side panel towards the lateral edge, said sewing panels and said side panels extending longitudinally from the end edge toward the leg edge; (ii) a rear region opposite the front region, the rear region having an end edge, side edges, leg edges, a central panel comprising a waistband panel and a centrally located panel, extending the side panels laterally outwardly from the center panel, and a seam panel extending laterally outwardly from each side panel towards the side edge, said seam panels and said side panels extending longitudinally from the end edge towards the leg edge; and (iii) a crotch region between the frontal region and the posterior region; characterized in that (b) a first belt layer positioned to extend laterally continuously across the front region from one side panel to the other side panel, the first belt layer being attached to the frame layer; (c) a second belt layer positioned to extend continuously laterally through the rear region from at least one side panel to the other side panel, the second belt layer being attached to the frame layer; (d) an elastically extensible front stretch laminate positioned on each side panel of the front region, the front stretch laminate comprising a part of the frame layer on the side panel, a portion of the first belt layer on the side panel , and an elastic panel member, operatively joined with the frame layer or the first belt layer, each front stretch laminate being elastically extensible in at least the lateral direction; (e) an elastically extensible back stretch laminate positioned on each side panel of the rear region, the back stretch laminate comprising a part of the frame layer on the side panel, a part of the second belt layer on the side panel , and an elastic panel member, operatively joined to the frame layer or to the second belt layer, each back stretch laminate being elastically extensible in at least the lateral direction; and (f) intermittent lap seams that join the frontal region to the posterior region in separate locations to form two leg openings and a waist opening.
  2. 2 - A disposable, unitary pull garment comprising: (a) a frame layer comprising a continuous sheet defining below (i) a front region having an end edge, side edges, leg edges, a central panel which comprises a waistband panel and a centrally located panel, the side panels extending laterally outward from the center panel, and a seam panel extending laterally outwardly from each side panel to the side edge, said panels of sewing and said side panels extending longitudinally from the extreme edge towards the leg edge; (ii) a rear region opposite the front region, the rear region having an end edge, side edges, leg edges, a central panel comprising a waistband panel and a centrally located panel, extending the side panels laterally outwardly from the center panel, and a seam panel extending laterally outwardly from each side panel to the side edge, said seam panels and said side panels extending longitudinally from the end edge towards the leg edge; and (iii) a crotch region between the frontal region and the posterior region; said frame layer having an external surface and an internal surface and accompanying a nonwoven web; characterized in that: (b) a backsheet positioned on said inner surface of the frame layer, the backsheet having an outer surface adjacent to the inner surface of the frame layer, and an internal surface opposite the outer surface making up the backsheet a backsheet core layer and a backsheet backing layer positioned laterally outwardly from the backsheet center layer on each side panel, the backsheet core layer being liquid impervious and vapor permeable; (c) a liquid permeable top sheet placed on the inner surface of the backsheet; (d) an elastically extensible front stretch laminate positioned on each side panel of the front region, the front stretch laminate comprising a part of the frame layer on the side panel, a portion of the back sheet reinforcing layer on the side panel, the side panel, a part of the top sheet in the side panel, and an elastic panel member, joined to the frame layer, each front stretch laminate being elastically extensible in at least the lateral direction; (e) an elastically extensible back stretch laminate positioned on each side panel of the back region, each back stretch laminate comprising a part of the frame layer on the side panel, a portion of the back sheet reinforcement layer on the side panel, a part of the top sheet in the side panel, and an elastic panel member attached to the frame panel, each back stretch laminate being elastically extensible in at least the lateral direction; and (f) intermittent overlap seams that join the frontal region to the posterior region in separate locations to form two leg openings and a waist opening.
  3. 3.- a disposable pull garment characterized in that the garment comprises: (a) a belt having (i) a front region having a central panel having a waistband panel and a panel located in the center, said panel located in the center not being picked up; a side panel positioned on either side of the center panel, each side panel being elastically extensible in at least the lateral direction; and a seam panel extending laterally outwardly from each side panel; (I) a rear region having a central panel having a waistband panel and a panel located in the center, said panel located in the center not being picked up; a side panel positioned on either side of the center panel, each side panel being elastically extensible in at least the lateral direction; and a seam panel extending laterally outward from each side panel; (iii) intermittent overlap seams that join the seam panel in the frontal region with the corresponding seam panel in the posterior region in separate locations, such that the belt is continuous; said belt comprising: a first belt layer extending continuously through the front region, and a second belt layer extending continuously through the rear region; an elastic panel member operably linked to the first belt layer in each side panel of the front region; an elastic panel member operably linked to the second belt layer in each side panel of the rear region; and (b) an absorbent assembly attached to the belt in the front region and in the rear region to form a crotch region, which fits between the user's legs, the absorbent assembly comprising an outer cover layer and an absorbent core attached to the belt. same.
  4. 4. A unitary disposable pull garment comprising a front region and a back region, said front region and said back region overlapping each other, and at least one intermittent overlap seam joining the front region to the region later in separate locations.
  5. 5. A disposable, unitary pull garment comprising: (a) a frame layer comprising a continuous sheet defining below (i) a front region having an end edge, side edges, leg edges, a panel central comprising a waistband panel and a centrally located panel, the side panels extending laterally outward from the central panel, and a seam panel extending laterally outwardly from each side panel towards the side edge, said sewing panels and said side panels extending longitudinally from the extreme edge towards the leg edge; (I) a rear region opposite the front region, the rear region having an end edge, side edges, leg edges, a central panel comprising a waistband panel and a panel located in the center, extending the side panels laterally towards outside from the center panel, and a seam panel extending laterally outward from each side panel towards the side edge, said seam panels and said side panels extending longitudinally from the end edge toward the leg edge; and (iii) a crotch region between the frontal region and the posterior region; characterized in that (b) an elastically extensible front stretch laminate positioned on each side panel of the front region, each front stretch laminate being elastically extensible in at least the lateral direction; (c) an elastically extensible back stretch laminate positioned in each side panel of the back region, each back stretch laminate being elastically extensible in at least the lateral direction; and (d) intermittent overlap seams from the frontal region to the posterior region at separate locations to form two leg openings and a waist opening.
  6. 6. The garment according to any of the preceding claims, wherein the intermittent overlap seams join together the front and rear seam panels.
  7. 7. The garment according to claim 6, wherein the front seam panels overlap the rear seam panels.
  8. 8. The garment according to claim 7, wherein the seams comprise a plurality of groups of individual joints, the groups being separated from one another to provide a disjointed portion.
  9. 9. The garment according to claim 8, wherein the disengaged portion varies from about 20 to about 65% of the seam length.
  10. 10. The garment according to claim 8, wherein the seam comprises a group adjacent to the leg opening having a height of at least about 20 mm.
MXPA/A/1998/006721A 1996-02-22 1998-08-19 Disposable shoes that are j MXPA98006721A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08605605 1996-02-22

Publications (1)

Publication Number Publication Date
MXPA98006721A true MXPA98006721A (en) 1999-02-24

Family

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