WO2017105521A1

WO2017105521A1 - Pants-type absorbent article with ergonomic fit channel

Info

Publication number: WO2017105521A1
Application number: PCT/US2015/066921
Authority: WO
Inventors: Seul Lee; Kueyoung You; Minjae Lee; Jiyoung H. JUNG; Marcille Faye Ruman
Original assignee: Kimberly-Clark Worldwide, Inc.
Priority date: 2015-12-18
Filing date: 2015-12-18
Publication date: 2017-06-22

Abstract

A pants-type absorbent article includes front and back waist panels indirectly connected to each other via an absorbent assembly. The back waist panel is formed from an elastic component, such that it includes an activated elastic component zone which surrounds two symmetrically positioned, inactivated elastic component zones. A further activated elastic component zone is positioned between the inactivated elastic component zones and in a location corresponding to the intergluteal cleft region of the wearer of the article. The further activated elastic component zone forms an ergonomic fit channel which urges portions of all article layers situated directly above it towards the intergluteal cleft region of the wearer of the article.

Description

PANTS-TYPE ABSORBENT ARTICLE WITH ERGONOMIC FIT CHANNEL

FIELD OF THE INVENTION

The present invention is generally directed to garment-like, personal care absorbent articles, especially for use by children and adults experiencing incontinence, or women who are experiencing menorrhea. In particular, the present invention is directed to pants-type, personal care absorbent articles with elastic components for improved body fit.

BACKGROUND OF THE INVENTION

So as to provide some relief for the condition of incontinence, or protection to women who might be menstruating, absorbent garment-like articles have been developed which envelope a wearer's lower abdominal region, and are used to capture body exudates. Such articles are worn in lieu of traditional undergarments, especially when risk of high volumes of body exudate are likely. For example, such absorbent articles may be used to enable a wearer to engage in lengthy daily activities, with reduced concern for outer garment or bed linen soiling. These articles may be used by women as well, for overnight sleepwear during menstruation.

Such absorbent articles include an absorbent structure which is placed adjacent a wearer's crotch region and which is designed to absorb and retain a relatively large quantity of body exudate such as urine or menses. These articles typically include a liquid permeable topsheet or liner layer, for direct contact with the body of a wearer, and through which urine or menses are brought into the article, a liquid impermeable backsheet layer for direct contact with the outer garments of a wearer or a wearer's bedding, and which prevents leakage of body exudate that has been absorbed and retained in the article, and at least one absorbent layer (often including either cellulosic fluff material, superabsorbent materials (SAP), or a combination of both), which is sandwiched and sealed between the topsheet and backsheet layers, and in which absorbed exudate is stored until the article is changed by the wearer or a caregiver. Additional functional layers may also be included, such as for example, a surge or fluid transfer layer, situated between the topsheet and absorbent layers.

Such articles have several design configurations. For instance, in one article design, an elastic backsheet layer may extend beyond the outer edges of a topsheet and absorbent layer, to the full longitudinal and transverse dimensions of the article. Alternatively, the topsheet and backsheet layers may partially extend along the longitudinal and transverse dimensions of the article. For example, in certain article designs, the topsheet, backsheet, and absorbent core layers may be part of a distinct absorbent insert or assembly, which insert is itself attached via the backsheet layer, to either spaced- apart side panels or spaced apart waist panels (which panels are elastic and may or may not be liquid impermeable). In such designs, typically only the absorbent insert or assembly forms the crotch component of the absorbent article, which is attached to the spaced-apart side or waist panels along the insert's peripheral end edges. An example of this style absorbent article is described in United States Patent Publication 2004/243085 to Veith et al., which is incorporated by reference thereto in its entirety, to the extent not inconsistent with this disclosure. Typically, in such insert or assembly designs, the spaced-apart side or waist panels are bonded together such that the article has fixed side seams in the waist region.

Such absorbent articles may alternatively include refastenable waist panels, in which waist panel edges are brought and held together with fastening tabs. In such refastenable designs, the articles are typically first placed between a wearer's legs and adjacent the wearer's crotch, and then fastened about the waist by use of either adhesive or mechanical fasteners located on a series of tabs (such as hook-and-loop style fasteners), that releasably connect the waist panel edges in the article together. Even though such articles may include elastic components in the waist or side panels, these refastenable articles may not provide as close-to-body fit as may be desired by the wearer (except for the adjustability provided by the refastenable tabs).

Alternatively, such article designs are not refastenable, but instead are pulled on a wearer by inserting the wearer's legs through two pre-formed leg openings within the article, with the article then being pulled up about the wearer's legs and positioned around the wearer's lower abdomen. Such designs frequently include elastic components completely around the waist region (elastic front and back waist panels) so as to maintain a close-to-body fit about the wearer over the time that the articles are worn, and may also include some additional elasticity in other article areas. Such elastic waist components maintain the articles about the wearer's lower abdomen, despite the increasing weight of the article resulting from absorption of urine or menses over time.

Even when such articles include elastic side or waist panels, such articles frequently either are not elastic across the entire crotch region, or provide only for targeted elasticity across limited areas of the crotch region, such as across the lowest-most area of the crotch region when the article is being worn. Such targeted elasticity typically results from the use of elastic strands which cross the crotch region from one article side to the other, so as to prevent article sagging at the crotch.

Such absorbent articles or garments (also known as "pants-type" articles), resemble brief or panty- style undergarments, and frequently also include an upper elastic waist-band region and separate elastic regions surrounding the leg openings (in addition to the waist elastics) for a more secure fit and leakage prevention. The articles may also include elastic crotch barriers or cuffs, which are positioned above and attached adjacent to the lateral side edges of the topsheet layer. Such barriers provide for close-to-body fit and enhanced side-leakage protection.

The elastic, waist-enveloping portion of a pants-type article (also known as the chassis), typically relies on either elastic strands, elastic nonwoven sheets, elastic films, or laminates thereof in each of a front and back waist panel, in order to maintain the body-conforming fit of the article about a wearer's lower abdomen. The elastic material is typically fixed in a stretched state to outer nonwoven layers. Such elastic materials may also be used to maintain the longitudinal ends of the absorbent layer in close proximity to a wearer's body in an effort to avoid sagging of portions of the article over time (and subsequent discomfort brought on by the sagging), and to enable the rapid absorption of exudate, thereby avoiding accumulation of liquid waste on the surface of the topsheet layer/absorbent core layer. Such accumulation of liquid waste on the surface of the topsheet layer/absorbent core layer may occur if spatial gaps were to form between that topsheet layer/absorbent layer and a wearer's body. The accumulation of such waste may lead to exudate runoff from the sides of the article. Elastic, pants-type articles with strand elastic components over the longitudinal ends of an absorbent layer are described for example, in International Patent Publication WO 93/17648 to Widlund et al . However, even within such elastic strand articles, non-elastic gaps are present between elastic strands (adjacent the non-elastic absorbent layer) and also throughout much of the crotch region, which gaps create non-uniform compression of the absorbent layer against a wearer's body.

While use of elastic components in absorbent articles offers certain advantages in the waist region, such as close-to-body fit, it has also been found that the use of elastic components in the chassis panels creates waist or side panels which are completely contoured where the elastic components are present. The attachment of these contoured elastic panels to nonelastic sheets of absorbent inserts (such as film backsheet layers), poses additional manufacturing challenges, and sometimes also creates accentuated gathers or buckles, that disadvantageously distinguish the appearance of such articles from that of traditional brief or panty-style undergarments. There is therefore a need for methods of article manufacture which allow for easier attachment of substantially contoured elastic layers to non-contoured layers, or that at least minimizes manufacturing challenges with bringing the two dissimilar layers together without increasing the likelihood for a gathered appearance.

Furthermore, with all of these absorbency and comfort-related developments in absorbent article technology, consumers are still keenly aware that pants-type, absorbent articles are not as form-fitting as traditional undergarments, and consequently may lead to embarrassment in social situations if such articles are inadvertently viewed by family members or caregivers, or which profile is viewed by passersby through a wearer's clothing. Such observation is not uncommon, since the absorbent articles often may have a puffy, textured, or enlarged profile under a wearer's outer garments.

Therefore there has been a continuing need for absorbent articles which more closely resemble the appearance of traditional undergarments, even under a wearer's clothing, while still providing the absorbency and comfort needed to address incontinence or other concerns of both children and adults.

Despite the advantages of generally avoiding article sagging and retaining some close contact of select regions of the absorbent layer with the body of a wearer, the presence of elastic components and the compression caused by the elastic structures across an absorbent layer transverse direction can lead to core deformation. Such core deformation results in undesirable and irregular, longitudinally-directed or transversely-directed channels being created in the core layer by the compression of spaced-apart elastic materials (such as elastic strands). Such irregular channel formation creates nonuniform contact of the topsheet layer/absorbent layer with a wearer's body (for example in the intergluteal cleft area). Such nonuniform contact creates gaps between the article and a wearer, eventually leading to the flow of urine or other exudate across the topsheet layer, and ultimately may lead to article leakage. Such gaps can also lead to article discomfort and a buckled outward visual appearance, in contrast to the smooth appearance of traditional brief or panty-style undergarments. Such buckled appearance may sometimes be observed through a wearer's outer garments, potentially also leading to embarrassment in social situations, or at least the wearer being overly conscious of their own appearance when around others.

As a result of these disadvantages, it has not been uncommon for absorbent article manufacturers to selectively inactivate or deaden portions of elastic components over, or immediately adjacent the peripheral edges of the absorbent layer or absorbent insert, where the absorbent layer or insert is adhesively bonded or otherwise attached to elastic front and back panels, so as to reduce leakage, and also to address the disfavored buckled appearance of such articles. For example, having inactivated elastic components adjacent the absorbent layer peripheral edges or across the entire absorbent core layer reduces core deformation, as well as some of the unsightly gathers that form on the outer surface of the article from retracted elastic components. However, use of inactivated elastic waist panel components completely across an absorbent layer in such articles frequently also causes the crotch portion of the absorbent article and absorbent layer portions immediately adjacent a wearer's upper buttocks region (intergluteal cleft region), to excessively bulge or sag. Such bulging is illustrated for example in Figure 3 which shows a photograph of a backside portion of a prior art pants- type, absorbent article 2 (displayed on a mannequin), having elastic material that is either absent from, or has been inactivated across all areas of the chassis adjacent the buttocks region. As seen in Figure 3, the backside of the absorbent article 2 includes an elastic chassis 3 that does not extend elasticity to areas around the absorbent core insert 4, but remains elastic about the waist opening 9. The region missing elasticity is gathered in locations 5 laterally beyond the region of the absorbent core insert 4, as well as in locations 6 directly over the absorbent core layer itself (through the article depth direction). Particularly, the areas of the absorbent article immediately adjacent the intergluteal cleft of the wearer, remain puffy in appearance. In such an article, the attachment of elasticized panels to nonelastic sheets (i.e. backsheet layer) of the absorbent core insert 4 may cause irregular deformation of the absorbent core insert 4 in addition to unsightly bulges on the article outermost layer. Such deformation 7, 8 may create a gap or separation of the absorbent core layer insert from the wearer's body (and consequently nonuniform body contact between adjacent deformation channels), and the potential for accumulation of excess exudate upon the surface of a topsheet layer adjacent the core layer, which may lead to subsequent leaks and discomfort. Such separation also highlights visually to the wearer, caregiver, and/or potential passersby (via the article profile that may be seen through a wearer's outer garments), that the wearer is not wearing traditional brief or panty-style undergarments. The puffiness also leads to discomfort and excessive noise as the wearer walks about and participates in daily activities, since the bulging structure moves from positions closer to the wearer's body (when the wearer is sitting), to positions farther from the body, when the wearer is standing or walking. There is therefore a need for absorbent articles which stay in place, and demonstrate reduction in article bulging adjacent the intergluteal cleft, as well as increased absorbency efficiency of the absorbent core layer. There is a further need for absorbent articles which provide improved aesthetic appearance and profile when viewed either directly by a wearer or caregiver, or alternatively, by passersby through a wearer's outer garments.

Various designs have been pursued by absorbent article manufacturers, to specifically provide "lift" of the absorbent core layer or absorbent insert of absorbent articles, which would correspond with the intergluteal cleft and upper buttock's region of a wearer's anatomy. Such designs have been created to more closely conform the absorbent article to a wearer's body in these target areas, so as to predictably maintain the absorbent core layer in closer proximity to that region of a wearer's anatomy from which exudate is most likely to be released or leak. Such curved regions of a wearer's anatomy are notorious for posing leak challenges.

Therefore, designs have been described which include elongated elastic strands placed along the full, central longitudinal direction of an absorbent article, or a significant portion of the length, in order to maintain the central absorbent crotch region, and adjacent central, longitudinally-directed article regions, in close proximity to a wearer's body. Such designs include those detailed in United States Patent No. 6,464,678 to Shimoe et al., United States Patent Publication 2006/0161131 to Kurata et al., and Japanese Patent Publication JP2000093462 to Komatsu et al. Such designs however, require the addition of relatively long strands of dedicated elastic materials to be placed along substantially the full central length of the article, in addition to the normally present elastic materials around the waist or leg openings. Such designs also require additional manufacturing processes to implement.

Furthermore, these designs only provide elastic lift in the crotch region along the article longitudinal direction. These designs may also lead to absorbent layer deformation (gathering) along the full length or a significant portion of the crotch region, adjacent the strands, and wearer discomfort/irritation as the absorbent layer and other central areas of the article, are constantly forced into close contact with a wearer's body along much of the article length.

Still, other designs have been described to increase the fit of absorbent articles in the buttocks region, by the inclusion of continuous, transverse-direction elastic materials across the waist and crotch regions, and by also providing "V"-shaped, or "U"-shaped paths in the transverse-direction elastic materials which would correspond to a wearer's intergluteal cleft region. Such designs are illustrated for example in Japanese Patent Publication 2001204762 to Hayashi et al. These designs utilize a large amount of costly elastic materials, may require complex manufacturing arrangements, and may also lead to absorbent layer deformation as a result of retraction of the spaced-apart elastic components, which elastic components are spaced apart along the absorbent layer.

Still further designs have been described to increase the fit of absorbent articles in the buttocks region, by inclusion of dedicated elastic materials only in the central portion of the crotch region. Such designs are illustrated for example in Japanese Patent Publications 2007167166 to Nakaoka, 2012024463 to Nakano, and United States Patent Publication 201410031783 to Arayama et al. In these references the described central elastic member is positioned at the lowest portion of the article crotch region for lifting the article in the vertical direction when worn. As with previously described embodiments, such designs require more complex manufacturing techniques in order to place dedicated, discrete elastic materials in the article, and may lead to absorbent layer deformation since such elastic materials are also spaced apart along the absorbent layer.

Finally, in United States Patent Publication 2013/0102982 to Nakano et al., an absorbent product is described that attempts to create improved fit along a part of the intergluteal cleft to the crotch of a wearer, so as to create a less puffy and uncomfortable feeling at the crotch portion of an absorbent article during wear. As with previously described references, such described article utilizes waist- panel elastic stranded materials, but also, intergluteal cleft-positioned elastic strands which dedicated strands may be cut outside of the intergluteal cleft region, and are uncut within the intergluteal cleft region. The intergluteal cleft-positioned elastic strands are formed from separated elastic materials, or waist-originating elastic strands (or curved elastic strands). The design, like previously described alternatives, has non-elastic absorbent layer portions positioned adjacent to the elastic strands. The non-elastic portions (which do not retract as do the absorbent core layer regions immediately adjacent the elastic strands), likely produce a deformed absorbent layer region in this intergluteal cleft location. Such deformation would include an irregular topography to be placed along a visibly apparent area of the wearer's anatomy (when viewed through a wearer's clothing). There is therefore a need for a pants-type absorbent article, which includes a more form-fitting intergluteal cleft region in its design.

There is a further need for pants-type, absorbent articles which provide a more form-fitting profile in order to improve overall aesthetic appearance by reducing unsightly bulges or gathers, to improve comfort of the wearer, and to maintain uniformly close association of the absorbent core layer with the wearer's body so as to improve absorbent efficiency and ultimately reduce opportunity for article leakage.

SUMMARY OF THE INVENTION

In one embodiment, a pants-type, absorbent article has a longitudinal direction, a transverse direction, a depth direction, and a longitudinal centerline. The pants-type, absorbent article has a waist region for enveloping the lower abdomen of a wearer, and a crotch region for positioning adjacent the crotch of a wearer. The pants-type, absorbent article includes a a chassis forming the waist region and including a front waist panel for placement adjacent a wearer's abdomen front, and a back waist panel for placement adjacent a wearer's abdomen back. An absorbent assembly forms the crotch and has two longitudinal ends. The absorbent assembly includes at least a liquid permeable topsheet layer and an absorbent layer (which itself may include one or more layers). The absorbent assembly overlaps with, and is attached to the front and back waist panels, such that at least a portion of the absorbent layer overlaps with the back waist panel. The back waist panel has an activated elastic component in an activated elastic component zone, and further has two inactivated elastic component zones formed from inactivated elastic component, at least partially surrounded by the activated elastic component zone. The inactivated elastic component zones are positioned on either side of the longitudinal centerline and include a gap there between. An ergonomic fit channel is formed within the gap, wherein the activated elastic component continues from the activated elastic component zone into the gap. The ergonomic fit channel including the activated elastic component, forms a three- dimensional protrusion within the back waist panel that can extend within a corresponding intergluteal cleft region of a wearer of the article. In one embodiment, the three-dimensional protrusion forms after the article is placed on a wearer. In an alternative embodiment, the three-dimensional protrusion is formed in the article when it is received by the wearer.

In an alternative embodiment, at least a differentiated portion or region of the absorbent layer is vertically aligned with the ergonomic fit channel along the depth direction. Such differentiated region may be differentiated from adjacent absorbent layer regions by basis weight differences, embossment or compression differences, thickness differences, or other line of weakness structures. In still a further alternative embodiment, the activated elastic component provides at least transverse direction stretch and recovery to the pants-type, absorbent article. Such activated elastic component for providing transverse direction stretch and recovery (in the activated elastic component zones) can be selected from the group consisting of elastic strands, elastic ribbons, elastic films, and laminates of the foregoing (such as for example stretch bonded laminates). In yet another alternative embodiment, the activated elastic component provides at least transverse direction stretch and recovery to the pants- type, absorbent article, alternatively, transverse direction stretch and recovery and longitudinal direction stretch and recovery to the pants-type, absorbent article.

In another alternative embodiment, the two inactivated elastic component zones are symmetrically shaped. In still a further alternative embodiment, the two inactivated elastic component zones are connected along at least one bridge between the two zones, and alternatively two bridges, such that the ergonomic fit channel is an elongated continuous channel having two inactivated or closed ends, one at each end of the channel. In another alternative embodiment, the two inactivated elastic component zones are of the same shape and size. In still another embodiment, the two inactivated elastic component zones are symmetrically shaped and positioned on either side of said longitudinal centerline. In a further alternative embodiment, the ergonomic fit channel is a continuous channel along the back waist panel, alternatively an elongated, continuous channel.

In another embodiment, the absorbent assembly further includes a liquid impermeable back sheet layer that is bonded to the topsheet layer, and which seals and sandwiches the absorbent layer there between. Such liquid impermeable backsheet layer faces away from the topsheet layer. In yet another alternative embodiment, the front and back waist panels are spaced apart from one another. In another embodiment, the front and back waist panels are part of a single sheet of material, or a single laminate sheet of material.

In still another alternative embodiment, the activated and inactivated elastic component is formed from a film-based, stretch bonded laminate material, such as in one embodiment, an elastic film laminated between two nonwoven sheets. In a further alternative embodiment, the front waist panel also includes an activated elastic component zone including an activated elastic component. Alternatively, the front waist panel includes an activated elastic component zone and an inactivated elastic component zone. In yet another alternative embodiment, the absorbent layer has a longitudinal end that overlaps with the front waist panel, the front waist panel further including two spaced apart, inactivated elastic component zones of inactivated elastic component positioned symmetrically on either side of the longitudinal centerline, and that are at least partially surrounded by the activated elastic component zone, and in which the activated elastic component extends in a channel between the spaced apart inactivated elastic component zones.

In still another alternative embodiment, the absorbent layer overlaps with the back waist panel and includes a line of weakness that is vertically aligned with the ergonomic fit channel. In another alternative embodiment, the absorbent layer includes adjacent absorbent layer portions or regions, each of which overlap with the back waist panel, and the line of weakness is formed from either a density gradient between said adjacent absorbent layer regions (such as being formed from an embossed absorbent layer region next to an unembossed absorbent layer region), a thickness gradient between the adjacent absorbent layer regions , a basis weight gradient between the adjacent absorbent layer regions, or a combination thereof. The gradients of density, thickness, or basis weights may be gradual or may be abrupt.

In yet another alternative embodiment, the absorbent layer includes regions having higher and lower basis weights, with a region having a lower basis weight being vertically aligned with both the longitudinal centerline and the ergonomic fit channel along the back waist panel.

In an alternative embodiment, the inactivated elastic component zones, and the activated elastic component zone within the ergonomic fit channel, are visually distinguished from one another based either on the zones having different print patterns, different coloration, different bond patterns, or a combination thereof. In a further alternative embodiment, the activated elastic component zone within the ergonomic fit channel includes straight walls within the channel, defined by the inactivated elastic component zones. In still another embodiment, the activated elastic component zone within the ergonomic fit channel includes an outwardly flared opening to the channel. In a further alternative embodiment, the absorbent article is refastenable. In still a further alternative embodiment, the inactivated elastic component of the inactivated elastic component zones is inactivated by exposure to either mechanical processes (such as chopping or severing), heat, pressure, chemical changes, ultrasonic energy, or a combination thereof. In one particular embodiment, the inactivated elastic component of the inactivated elastic component zone is inactivated by exposure to ultrasonic energy. In another alternative embodiment, the absorbent layer includes an embossed pattern, at least part of which is vertically aligned with the ergonomic fit channel. In still a further alternative embodiment, the shape of the absorbent layer defines a gap, or annular opening in which no absorbent material is present, and which gap or annular opening is vertically aligned with the ergonomic fit channel.

In another alternative embodiment, a pants-type, absorbent article has a longitudinal direction, a transverse direction, a depth direction, and a longitudinal centerline. The pants-type, absorbent article has a waist region for enveloping the lower abdomen of a wearer, and a crotch region for positioning adjacent the crotch of a wearer. The pants-type absorbent article includes a chassis forming the waist region and including a front waist panel for placement adjacent a wearer's abdomen front, and a back waist panel for placement adjacent a wearer's abdomen back. An absorbent assembly forms the crotch, and has two longitudinal ends. The absorbent assembly includes at least a liquid permeable topsheet layer and an absorbent layer, with the absorbent assembly overlapping with, and attached to the front and back waist panels at the longitudinal ends, such that at least a portion of the absorbent layer overlaps with the back waist panel.

The back waist panel has an activated elastic component in an activated elastic component zone, with the activated elastic component comprising a stretch bonded laminate such as a film-based, stretch bonded laminate, and further having two inactivated elastic component zones formed from inactivated elastic component with the inactivated elastic component also including a stretch bonded laminate, but one that has been inactivated, such as a film-based, stretch bonded laminate, at least partially surrounded by the activated elastic component zone. The inactivated elastic component zones are positioned on either side of the longitudinal centerline and include a gap there between. An ergonomic fit channel is formed within the gap, wherein the activated elastic component continues from the activated elastic component zone into the gap. The ergonomic fit channel, including the activated elastic component, forms a three-dimensional protrusion within the back waist panel that can extend within a corresponding intergluteal cleft region of a wearer of said article. Such three-dimensional protrusion or ridge may be created either once the article is eventually worn by a wearer, or alternatively, before the article is actually worn by a wearer.

In still a further alternative embodiment, the absorbent layer includes a region or portion that is vertically aligned with the ergonomic fit channel, and the region or portion includes either a lower basis weight or higher basis weight of absorbent material than partially surrounding or entirely surrounding absorbent layer regions. In yet a further alternative embodiment, the absorbent layer includes a compressed or embossed region that is in vertical alignment with the ergonomic fit channel.

Alternatively, the shape of the absorbent layer (or absorbent layers) defines a gap or opening in the absorbent layer (in which absorbent material is missing), with the gap or opening being vertically aligned with the ergonomic fit channel. The gap may be the result of a space formed between two arm-like extensions of the absorbent layer.

BRIEF DESCRIPTION OF THE DRAWINGS

A full and enabling disclosure of the present invention is set forth more particularly in the remainder of the specification, including reference to the accompanying Figures 1 A-2, 4-7 in which:

Figure 1A is a top plan view (topsheet layer surface facing viewer) of a pants-type, absorbent article in accordance with the disclosure, and in a generally flattened condition (such that no overlapping gathers are present in the article).

Figure 1 B is a top plan view (topsheet layer surface facing viewer) of an absorbent assembly for use on a pants-type, absorbent article in accordance with the disclosure in a generally flattened condition.

Figure 1 C is a back plan view (backsheet layer surface facing viewer) of a pants-type, absorbent article in accordance with the disclosure, and in a generally flattened condition (such that no overlapping gathers are present in the article).

Figure 1 D is a top plan view (topsheet layer surface facing viewer) of an alternative embodiment of an absorbent assembly for use on a pants-type, absorbent article in accordance with the disclosure, and in a generally flattened condition.

Figure 1 E is a transverse direction, exploded, partial cross-sectional view of an alternative embodiment of the absorbent assembly of Figure 1 D, taken at lines 1 E-1 E.

Figure 1 F is a transverse direction, exploded, partial cross-sectional view of an alternative embodiment of the absorbent assembly of Figure 1 D, taken at lines 1 F-1 F.

Figure 1 G is a transverse direction, exploded, partial cross-sectional view of an alternative embodiment of the absorbent assembly of Figure 1 D, taken at lines 1 G-1 G.

Figure 2A is a transverse direction, exploded cross-sectional view of the pants-type, absorbent article of Figure 1 A, taken along lines 2A-2A.

Figure 2B is a longitudinal direction, exploded cross-sectional view of the pants-type, absorbent article of Figure 1 A, taken along lines 2B-2B.

Figure 2C is a longitudinal direction, exploded cross-sectional view of the pants-type, absorbent article of Figure 1 A, taken along lines 2C-2C (along the longitudinal centerline). Figure 2D is a transverse direction, exploded cross-sectional view of the pants-type, absorbent article of Figure 1 A, taken along lines 2D-2D.

Figure 3 is a photograph of the backside of a prior art, pants-type, absorbent article on a mannequin.

Figure 4 is a photograph of the backside of an alternative embodiment of a pants-type, absorbent article in accordance with the disclosure, on a mannequin.

Figure 5 is a top plan view (topsheet layer-side surface facing viewer) of an alternative embodiment of the pants-type, absorbent article of the disclosure, and with the article in a generally flattened condition (such that no overlapping gathers are present in the article).

Figure 6A-6F are top plan views of alternative embodiments of inactivated elastic component zones and ergonomic fit channels of inventive pants-type, absorbent articles, for placement adjacent the corresponding intergluteal cleft portion of a wearer's anatomy and with the articles in a generally flattened condition (such that no overlapping gathers are present in the articles).

Figure 7 is a top plan view of an alternative embodiment of the pants-type, absorbent article of the disclosure, with visual indicators of the ergonomic fit channel feature, and with the article in a generally flattened condition (such that no overlapping gathers are present in the article)

Definitions

As used herein, the term "nonwoven fabric or web" refers to a web having a structure of individual fibers or threads which are interlaid, but not in an identifiable manner as in a knitted fabric. Nonwoven fabrics or webs have been formed from many processes such as for example, meltblowing processes, spunbonding processes, coform processes, hydroentangling, airlaid processes, and bonded carded web processes (such as through-air bonded carded webs or TABCW).

As used herein, the terms "elastomeric," "elastic," "elasticized," and "elastically", generally refer to that property of a material or composite by virtue of which it tends to recover its original size and shape (or a portion thereof) after removal of a force causing a deformation. An elastomeric material is an extendable or stretchable material having recovery properties. Suitably, an elastomeric material can be elongated to at least 25 percent of its relaxed original length (percent elongation refers to the increase in the original length of the untensioned material, i.e., 0 percent refers to the original length of the untensioned material) in the direction of an applied biasing force, and which will recover, upon release of the applied force, at least 10 percent of its elongation, and in one embodiment, at least 50 percent of its elongation. It is generally preferred that the elastomeric material or composite be capable of being elongated by from at least about 25 percent of its relaxed original length (i.e., an increase of 25 percent from its untensioned length) to about 200 percent of its relaxed original length, for example preferably from at least about 50 to about 100 percent of its relaxed original length. An elastic material may include a fiber, strand, ribbon, film, laminate, or fabric. The elastic fiber, strand, ribbon, film, laminate, or fabric could be formed from any suitable material, including but not limited to: natural rubber materials, polymeric materials such as polyurethane, styrenic block copolymers, such as KRATON commercial elastomers from Kraton Polymers of Houston, Tex.; polyether ester, such as HYTREL from E. I. Du Pont De Nemours and Company Corporation Wilmington, Del.; polyether amide, such as PEBAX, from Atochem Corporation, France; and elastic metallocene-catalyzed materials, such as AFFINITY, from Dow Chemical, Midland, Mich. Furthermore, elastic fabrics may be formed from preformed polyester-polyurethane copolymer elastic yarns or strands, such as LYCRA brand strands. The elastic materials may be formed into laminates, such as for example, a neck- bonded laminate (NBL) or stretch-bonded laminate (SBL). Methods of making such materials are well known to those skilled in the art and are described in United States Patent Nos. 4,663,220 to Wisneski et al., 4,741 ,949 to Morman et al, 5,226,992 to Morman, 8,361 ,913 to Siqueira at al. (which describes elastic, apertured film-based, stretch bonded laminates), and European Patent Application No. EP 0 217 032 to Taylor et al, each of which is hereby incorporated by reference thereto in its entirety, to the extent that it is not inconsistent with this disclosure.

As used herein, the term "stretch-bonded laminate" refers to a composite material having at least two layers in which one layer is a gatherable layer and the other layer is an elastic layer. The layers are joined together when the elastic layer is in an extended condition so that upon relaxing the layers, the gatherable layer is gathered. Such a multilayer composite elastic material may be stretched to the extent that the nonelastic material gathered between the bond locations allows the elastic material to elongate. One type of stretch-bonded laminate is disclosed, for example, by United States Patent No. 4,720,415 to Vander Wielen et al, in which multiple layers of the same polymer produced from multiple banks of extruders are used. Vander Wielen et al . is hereby incorporated by reference thereto in its entirety, to the extent that it is not inconsistent with this disclosure. Other composite elastic materials are disclosed in United States Patent Nos. 4,781 ,966 to Taylor, 4,789,699 to Kieffer et al, 5,366,793 to Fitts.Jr. et al, 5,385,775 to Wright, and 6,969,441 to Welch et al, each of which is hereby incorporated by reference thereto in its entirety, to the extent that it is not inconsistent with this disclosure. Further reference will be had to United States Patent Nos. 4,652,487, 4,655,760, and 4,657,802 to Morman et aL.each of which is also hereby incorporated by reference thereto in its entirety, to the extent that it is not inconsistent with this disclosure. Conventionally, the term "neck-bonded" refers to an elastic member being bonded to a non-elastic member while the non-elastic member is extended and necked (narrowed). "Neck-bonded laminate" refers to a composite material having at least two layers in which one layer is a necked, non-elastic layer and the other layer is an elastic layer. The layers are joined together when the non-elastic layer is in an extended and necked condition. Examples of neck-bonded laminates include those described in United States Patent Nos. 4,965,122, 4,981 ,747; and 5,336,545 to Morman, each of which is hereby incorporated by reference thereto in its entirety, to the extent that it is not inconsistent with this disclosure. Conventionally, the term "necked stretch bonded" refers to an elastic member being bonded to a non-elastic member while the non-elastic member is extended and necked and the elastic member is at least extended. "Necked stretch bonded laminate" refers to a composite material having at least two layers in which one layer is a necked, non-elastic layer and the other layer is a stretched, and sometimes necked, elastic layer. The layers are joined together when in their extended (and necked) conditions. Examples of necked stretch bonded laminates are described in United States Patent Nos. 5,114,781 and 5,1 16,662 to Morman, each of which is hereby incorporated by reference thereto in its entirety, to the extent not inconsistent with this disclosure. Further examples of laminates that may be used in accordance with this disclosure are described in United States Patent No.

7,018,369 to VanGompel et al. which is hereby incorporated by reference thereto in its entirety, to the extent that it is not inconsistent with this disclosure. It should be appreciated at least from these references that the elastic laminates for use with the pants-type, absorbent article of this disclosure may include elastic layers that are formed from elastic yarns, strands, ribbons, nonwoven webs, films (such as nonapertured or apertured films), or combinations thereof.

For the purposes of this disclosure, the term "activated elastic component" shall mean an elastic component which retains its elasticity (that is, the ability to be stretched and recover at least a portion of the stretched distance) across a desired distance (such as a distance along the transverse direction), and which has not been exposed to a post-formation treatment or operation that has eliminated its elasticity.

For the purposes of this disclosure, the term "inactivated elastic component" shall mean in one embodiment, a material that was originally elastic when formed, but which, as a result of a post- formation treatment or operation, such as mechanical severing, chopping, exposure to heat or thermal or ultrasonic bonding, or other elasticity-degrading condition, has been rendered inelastic (such that the elastic material is deadened) in an absorbent article, so that it no longer demonstrates elasticity (stretch and recovery) across a desired distance (such as the transverse direction). In an alternative embodiment, the inactivated elastic component demonstrates a reduced level of elasticity following such a post-formation treatment or operation. In an alternative embodiment, the inactivated elastic component may also demonstrate a reduced level of elasticity when compared to the elasticity of surrounding materials. For example, by severing or chopping elastic strands or exposing elastic film to ultrasonic energy, the elasticity of such strands or film is effectively removed across the distance of the chopping or exposure, with the strands either snapping back to other regions within an article (removed from previously located positions) and/or the strands or film being disconnected from previously anchored positions such that elasticity is eliminated with respect to the laminate containing them. Alternatively, such material is exposed to heat, pressure, energy (such as ultrasonic energy), or chemical treatment such that the material is no longer elastic, regardless of how it is attached to adjacent layers. Methods for inactivating elastic components in pants-type, absorbent articles are described for instance in United States Patent Nos. 8,764,922 to Popp et al. and 8,956,493 to Tenorio et al., each of which is hereby incorporated by reference thereto in its entirety, to the extent that it is not inconsistent with this disclosure. It should be understood that in one alternative embodiment, the chemical composition of the elastic component in adjacent activated and inactivated elastic component zones shall be the same, as both zones shall be originally formed from the same elastic component material extending across and between adjacent zones. However, following inactivation of the elastic component in one (or two) of the adjacent zones, the physical (stretch and recovery) properties of the adjacent zones shall be different. In one embodiment, for a material having no elasticity, a specimen's breaking point (the point when the material either tears or tensile strength gradient rapidly changes) occurs at less than 75 % elongation. In a further alternative embodiment, an inactivated elastic component zone may be a zone of material that demonstrates a breaking point that is at least 20 % less than the breaking point of an activated elastic component zone immediately adjacent to it.

For the purposes of this application, the term "intergluteal cleft" shall refer to the sulcus between the buttocks.

As used herein, the terms "comprise", "comprises", "comprising" and other derivatives from the root term "comprise" are intended to be open-ended terms that specify the presence of any stated features, elements, integers, steps, or components, but do not preclude the presence or addition of one or more other features, elements, integers, steps, components, or groups thereof. Similarly, the terms "include", "includes", "has" and/or "have", and derivatives thereof, are intended to be interpreted as the word "comprise", and are intended to be open-ended terms that specify the presence of any stated features, elements, integers, steps, or components, but do not preclude the presence or addition of one or more other features, elements, integers, steps, components, or groups thereof. Test Methods

For the purposes of described testing, such testing should be conducted under the following environmental conditions. Testing should be conducted at 23°C ± 2°C (73.4 ± 3.6°F) and 50 ± 5% relative humidity.

Tensile Strength Measurement Method

Tensile Strength may be measured in accordance with a general test method for stretchable plastic sheeting materials, such as for example ASTM D882-10, and with a commercially available tension meter that is read for tensile strength at 50% elongation point, (unit: gf/inch).

For such a test method, a specimen may be prepared only from the stretchable waist chassis material (with absorbent assembly material removed). The gage length should be the transverse width of channel material (with a minimum size of channel material being at least 10 mm). The sample should be rectangular with the longest dimension between the grips. The test equipment may be as follows: Tester, Tensile , MTS Criterian 42 - Nonwovens Bundle , Commercially Available or Tester, Tensile , INSTRON Nonwovens Standard Bundle Test System , Commercially Available; Test Macro , Test Macro for either Testworks 4 or Bluehill2 programs , Grip, Pneumatic , MTS Model 100/200 Advantage Pneumatic Tensile Grip , Commercially Available.

Thickness Measurement Method (Absorbent Layer Thickness)

The Absorbent Layer Thickness shall equal the absorbent article (10) thickness in the area of absorbent article including the absorbent layer - the absorbent article (10) without the absorbent layer present. The measurement shall be conducted using a 50.8mm (Dia) platen and pressure of 0.2 pound-force per square inch (psi). All prepared specimens should be tested within one hour (from start of specimen preparation to completion of test). The specimens should be gently handled during preparation and testing so as not to disturb or change the thickness. The specimens should be prepared with the article lying generally flat on a work surface or cutting board surface. If a surge or other transfer layer is present, the surge or other transfer layer must be completely under the platen for the front thickness and specimen weight (if a surge material is present). The testing should be conducted with the topsheet layer side up. The display should be read and value recorded to the nearest 0.01 millimeter as the thickness value at the three-second count.

Reference now will be made in detail to various embodiments of the invention, one or more examples of which are set forth below. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment, may be used on another embodiment to yield a still further embodiment. For the purposes of this application, like features may be represented by like reference numbers and letters between the figures. While not illustrated in most figures except where additional placement emphasis is desired, it should be understood that traditional article construction adhesive (or other bonding technology) is to be used to fasten the various layers of the described articles together. Such construction adhesive or other bonding technology is desirably placed or practiced so as not to interfere with the flow of body exudate through the liquid permeable and absorbent layers of the article. Other contemplated bonding techniques include for example, ultrasonic, pressure, and thermal bonding techniques.

A pants-type, absorbent article is now disclosed which provides an ergonomic fit channel at least as part of an elastic, back waist panel of an article chassis, such channel being oriented for placement adjacent to the intergluteal cleft region of a wearer of the pants-type, absorbent article. The ergonomic fit channel is a continuous channel (or region) formed from an activated elastic component (along a generally straight area), which channel is positioned between two zones of inactivated elastic components, also in the back waist panel of the article. The two zones of inactivated elastic components are themselves partially surrounded by an activated elastic component zone, with the activated elastic component of the ergonomic fit channel extending continuously into the partially surrounding zone of activated elastic component. The two zones of inactivated elastic components may be separated discrete zones or connected zones. In one embodiment, the activated elastic component of the ergonomic fit channel is formed from an apertured film, stretch bonded laminate that provides transverse-direction stretch and recovery properties to the absorbent article ergonomic fit channel, along the back waist panel. However, the activated elastic components may be formed from elastic strands, elastic nonwovens, elastic films, or elastic laminates of these materials, such as stretch-bonded, neck-bonded, or necked stretch bonded laminates as previously described and having transverse direction stretch and recovery properties. The ergonomic fit channel is in one embodiment, aligned with the longitudinal centerline of the pants-type, absorbent article. Such ergonomic fit channel which includes an activated elastic component zone and is adjacent to two inactivated elastic component zones, acts to provide a form-fitting feature to a pants-type, absorbent article, and especially in the intergluteal cleft anatomical region of a wearer. Such feature provides vertical "lift" to the layers that are situated vertically above the ergonomic fit channel (when the article is viewed along the depth direction), which lift forces in one embodiment, a portion of the topsheet, absorbent, and backsheet layers into the intergluteal cleft region of a wearer during article use. Alternatively, such lift is present in the article to create a discrete protrusion, prior to the article being worn. Such lift is uniform along the entire length of the ergonomic fit channel, thereby maintaining the topsheet layer/absorbent core layer/and backsheet layer in close, and uniform contact with a wearer's body along the ergonomic fit channel length. The uniform contact allows for the rapid absorption of body exudate into the article in this area, with reduced opportunity for gap formation and subsequent fluid leakage, despite the curvature of the wearer's anatomy in this area. Such ergonomic fit channel also enables the article to stay in place, and not move about as the wearer changes position during daily activities. Also, by positioning inactivated elastic components adjacent to the ergonomic fit channel, the resulting absorbent article provides an outward appearance of a smooth surface, which in turn provides a smooth profile to the article when viewed through a wearer's outer garments.

A particular embodiment of an open (nonfastened), pants-type, absorbent article 10 is shown in top plan view (in a generally flattened state such that there are no overlapping portions) in Figure 1 A. Generally, the pants-type, absorbent article 10 is shown having a front waist panel 13 and a back waist panel 14, each attached to an absorbent assembly 22, which forms a bridge between the two waist panels 13, 14. At least the back waist panel 14, and in one embodiment both the front and back waist panels 13, 14 are each formed from an elastic component. The absorbent assembly 22 may be formed from either elastic or nonelastic materials. Most commonly the absorbent assembly is formed from nonelastic materials. The illustrated nonelastic absorbent assembly 22 includes a topsheet layer 22A facing the viewer, and the backsheet layer 22C facing away from the viewer. The topsheet layer 22A and the backsheet layer 22C sandwich together, and seal between them along their peripheral edges, an absorbent layer 22B. As seen in the Figure, the pants-type absorbent article 10 generally has a longitudinal direction L, a transverse direction T, and a depth direction D. The pants-type absorbent article 10 further includes a central longitudinal direction Lc (also known as a longitudinal centerline) about which the article is longitudinally symmetrical. Depending on the article design, it may also include a central transverse direction Tc (not shown) if such article is meant to be symmetrical about a transverse axis. While such design is not illustrated in Figure 1 A, such is also contemplated to be within the scope of the disclosure. A distance dimension along the longitudinal direction shall be referred to as a "length", and a distance dimension along the transverse direction shall be referred to as a "width". The dimensions are based on the pants-type, absorbent article being in a generally flattened condition, with no overlapping gathers in the article. In one embodiment, the width W1 of the pants-type, absorbent article 10 is between about 100 and 700 mm, alternatively, between about 150 and 550 mm. In one embodiment, the length L1 of the pants-type, absorbent article 10 is between about 300 and 1200 mm, alternatively, between about 400 and 900 mm. The width is relatively small, compared to the length, since it is in a generally relaxed state (apart from the minimal stretching needed to flatten it).

The pants-type, absorbent article 10 includes two longitudinally directed side edges 1 1 and two longitudinally directed ends 12. The pants-type, absorbent article 10 includes a waist chassis that is formed from the front waist panel 13 (which eventually forms the front waist of the formed/closed pants-type, absorbent article 10) and the back waist panel 14 (which forms the back waist of the formed/closed pants-type, absorbent article 10). While the panels 13, 14 are illustrated as separate panels, with the article being shown in an opened condition in the figure, it should be appreciated that they are typically permanently fastened to one another along bond lines (bond seams) along longitudinally directed front and back waist panel side edges (13A bonded to 14A). Such bonding may be accomplished by bonding methods known in the art, such as by adhesive, thermal, pressure, ultrasonic, or a combination of such bonding techniques. Alternatively, such side edges may be separated when received by a wearer and include optional refastenable fasteners, as are also generally known in the art, such as adhesive or mechanical fastening tabs, which may be used to adjustably re-fasten the front and back waist panels 13, 14 together. If the fasteners are to comprise adhesive patches, such adhesive may fasten to the garment-facing side surface (not shown) of front waist panel 13. If the fasteners are to comprise mechanical hook or loop fasteners, the hook or loop materials may fasten to a companion material on the garment-facing side surface (not shown) of the front waist panel 13. In an alternative embodiment, such front and back waist panels 13, M are bonded together as noted above, but are also capable of being opened along the bond seams for easy removal. In such an embodiment, the bond seams are frangible, such that they may be easily opened upon a downward ripping action of the wearer.

Also, while the waist chassis is shown in Figure 1 A as including two spaced apart front and back panels 13, 14, such waist chassis may instead be formed from a single sheet (not shown) or a single laminate sheet having generally the shape of the overall article 10 shown in Figure 1 A. In such an instance, the single sheet would be formed from an elastic component, and could itself also serve as the relatively larger, liquid impermeable backsheet layer. Relatively shorter and narrower topsheet and absorbent layers would then be placed on this alternate larger backsheet layer, in the crotch region, such that peripheral waist chassis areas laterally beyond the edges of the absorbent and topsheet layers, would provide elasticity.

The two separated front and back panels 13, 14 of Figure 1A are indirectly connected to one another via the bridging, absorbent assembly 22. Such bridging absorbent assembly (also known as an absorbent insert) forms the crotch portion of the pants-type, absorbent article 10. The absorbent assembly 22 is formed from a liquid permeable topsheet layer 22A which faces the body of a wearer in use, and an optional liquid impermeable backsheet layer 22C, which faces the outer garment of a wearer (or bedding), and an absorbent layer 22B, sandwiched and in one embodiment, sealed between the topsheet layer 22A and backsheet layer 22C (such as at peripheral seal 22 I, seen Figure 1 B). Optional leg opening, elastic strands 22D are situated along each longitudinally directed side edge of the assembly 22 (and article 10).

A top plan view of only the absorbent assembly 22 is illustrated for ease of reference in Figure 1 B (with the topsheet layer 22A facing the viewer). Areas of the absorbent assembly 22G that extend laterally beyond the lateral edges of the absorbent layer 22B may include only the topsheet layer 22A and backsheet layer 22C. Further, while not required, the particular absorbent layer 22B illustrated in the figures also include an end recess feature 22H, which may be vertically aligned with the longitudinal centerline of the absorbent article 10 and absorbent layer 22B, as well as the ergonomic fit channel. It should be recognized that the absorbent layer 22B outer shape is not limited to that shown in the figures, and may be formed of another geometric shape (such as oval, rectangular or triangular), alternatively of a shape having two distinctly bulbous ends as shown, or alternatively one in which a backside end is formed with two separated arm-like features, with each arm being positioned on an opposite side of the longitudinal centerline.

A transverse direction, cross-sectional view of the pants-type, absorbent article 10 (and in particular, of only the crotch region of the article) is shown in Figure 2A, taken from Figure 1A along line 2A-2A. The absorbent assembly 22 includes a middle portion 77 which does not overlap with either the front or back panels 13, 14, an end portion 76 that overlaps and is attached to the front waist panel 13, and an end portion 75 that overlaps and is attached to the back waist panel 14.

In the embodiment of Figure 1A, the chassis front waist panel 13 is defined by two longitudinally directed side edges 13A, two curved leg opening edges 13B along the longitudinal side edges of the article, a front waist panel edge 13C that faces the chassis back waist panel 14, and a front waist panel end edge 13D. Similarly, the chassis back waist panel 14 is defined by two longitudinally directed side edges 14A, two curved leg opening edges 14B along the longitudinal side edges of the article, a back waist panel edge 14C that faces the chassis front waist panel 13, and a back waist panel end edge 14D. As shown in the Figure, the chassis front waist panel 13 is of shorter length than the chassis back waist panel 14.

The chassis front waist panel 13 is in one embodiment, originally formed entirely from an elastic component, such as an elastic stretch or neck bonded laminate, or alternatively from an elastic film. In one embodiment, the chassis front waist panel 13 is breathable but not liquid permeable, alternatively, breathable and liquid permeable. Such elastic component of the front waist panel 13 includes along its dimension, an outermost, activated elastic component zone Z1 .

It should be recognized that the zones identified with a "Z" in this disclosure, refer to areas on the waist chassis panels, such as either on the front waist panel or on the back waist panel. For some embodiments, there may not be a visual distinction between adjacent zones. For other embodiments, there are visual distinctions between adjacent zones. While in some embodiments as will be described below, there may be multiple activated elastic component zones partially surrounding an inactivated elastic component zone, in other embodiments, there may only be a single activated elastic component zone which partially surrounds an inactivated elastic component zone.

The outermost, activated elastic component zone Z1 is elastic, such as being in one embodiment, elastic along the article transverse direction T, or optionally, along the longitudinal direction L, or optionally, along a combination of the two directions. It is attached to the absorbent assembly 22 on the liquid impermeable backsheet layer 22C of the absorbent assembly 22. Such attachment is by any of the known bonding techniques previously described, but in one embodiment by being adhesively attached. The absorbent assembly 22 is specifically attached to the front waist panel 13 along adjacent zones Z2 and Z3 of the front waist panel 13. The outer edge 70 of the absorbent assembly 22 is defined by topsheet 22A and backsheet layer 22C edges (since in the illustrated embodiment, they have the same outer dimensions). In one embodiment, the absorbent assembly 22 is attached to the front waist panel 13 (as well as the back waist panel 14) at the absorbent assembly longitudinal ends (adjacent edges 70, 73). Alternatively, such absorbent assembly 22 is attached to the waist panels 13, 14 at locations along the absorbent assembly longitudinally-directed side edges, between the edges 70, 73.

The zone Z2 of the front waist panel 13 that directly overlaps the absorbent assembly 22 (but not the absorbent layer 22B itself) may or may not be formed from an inactivated elastic component

(assuming that the front waist panel 13 is itself formed from an elastic component). That is, the elastic component forming the front waist panel 13 may be either activated or inactivated in zone 2. If formed from an inactivated elastic component, such zone would not have gathers or ridges that could be observed through a wearer's outer garments while being worn. As shown, it is formed from activated elastic component as in zone Z1. In zone Z3 of the front waist panel 13 however, the elastic component of the front waist panel is inactivated, (representationally shown with a diamond pattern in the figure) such that the absorbent layer 22B in this zone is not deformed during use, and does not produce an outwardly appearing bulky or gathered impression, especially when viewed through a wearer's outer garments. In order to inactivate the elastic component of zone Z3, the elastic component is treated or otherwise processed such that the elastic component in this zone is deadened as previously described. In one embodiment, the elastic component of the front panel 13 is formed from a film-based, stretch bonded laminate that has been inactivated in zone Z3 by exposure to ultrasonic bonding. As can be seen in the figure, inactivated zone Z3 of the front waist panel 13 extends a further lateral distance beyond the peripheral side edge 71 of the absorbent layer 22B.

In one embodiment, the front waist panel 13 has a width W1 along the transverse direction T of between about 100 and 700mm, alternatively, between about 150 and 550 mm (which is also equal to the width of the absorbent article itself). In one embodiment, the front waist panel 13 has a length L2 of between about 50 and 500 mm, alternatively, between about 100 and 400 mm. In one embodiment, the width of the absorbent assembly W2 that overlaps the front waist panel is between about 50 and 450 mm, alternatively between about 80 and 350 mm. In one embodiment, the length of the absorbent assembly L3 is between about 120 and 900 mm, alternatively between about 180 and 700 mm. In one embodiment, the length L4 of that portion of the absorbent assembly that overlaps the front waist panel 13 is between about 30 and 500 mm, alternatively, between about 50 and 300 mm. In one embodiment, the width W3 of the absorbent layer 22B of the absorbent assembly that overlaps the front waist panel 13 is between about 50 and 400 mm, alternatively, between about 80 and 300 mm, and the length L5 of the absorbent layer 22B (that overlaps the front waist panel 13 is between about 10 and 480 mm, alternatively, between about 30 and 280 mm. In one embodiment, the inactivated elastic component zone Z3 extends the full length and width dimensions of the absorbent layer 22B portion 24 that overlaps the front waist panel 13, and also slightly beyond the peripheral edge 71 of the absorbent layer 22B, that extends over the front waist panel 13. For instance, in one embodiment, the width W4 of the inactivated elastic component zone Z3 on the front waist panel 13 is between about 40 and 500, alternatively, between about 70 and 400 mm. The length L6 of the inactivated elastic component zone Z3 on the front waist panel 13 is between about 10 and 580 mm, alternatively, between about 20 and 380 mm. The lateral extension width W5 of the inactivated elastic component zone Z3 beyond the peripheral edge 71 of the absorbent layer 22B on the front waist panel 13, is desirably in one embodiment, between about (-)10 and 100 mm, alternatively, between about (-)5 and 50 mm. For the purposes of these dimensional values, when a value is given that is a negative (-) number, it shall mean that the dimension is inside the peripheral edge of the referenced layer, rather than laterally beyond the peripheral edge of the referenced layer.

While shown as having a generally dogbone peripheral shape with a narrowed middle portion 77, it should be appreciated that the absorbent assembly 22 (and absorbent layer 22B for that matter) may be of any of a variety of geometric or curvilinear shapes, such as for example rectangular, dogbone, oblong, triangular, or asymmetric. The length L7 of that middle portion of the absorbent assembly 22 that is not overlapping with either the front or back waist panels 13, 14 is in one embodiment, between about Oand 600 mm, alternatively, between about 0 and 350 mm. The value of "0" shall refer to the article design in which the waist chassis is formed from a single sheet of material, such that the entire absorbent layer or assembly would overlap the waist chassis. The absorbent assembly 22 may include optional longitudinal side edge flaps or cuffs 22E for preventing the lateral flow of body exudate off of the side edges of the pants-type, absorbent article 10. Such longitudinal side edge flaps or cuffs 22E are in one embodiment, attached along their lateral-most edges 22F to the topsheet layer (such as by a line of adhesive 170 as seen in Figure 2A) such that they form connected barriers along these side edges. Such longitudinal side edge flaps or cuffs 22E are generally known in the art and will not therefore be otherwise described. However, they may optionally include one or more elongated folds and/or elongated elastic components along the longitudinal direction of the article to provide close-to- body fit.

The illustrated absorbent assembly 22 includes lateral portions 22G, solely comprised of the liquid permeable topsheet layer 22A, and liquid impermeable backsheet layer 22C, which extend beyond the peripheral edge of the absorbent layer 22B, and which also form part of the leg opening edges of the absorbent article 10. The absorbent layer 22B itself, includes an end portion 24 which overlaps the front waist panel 13, a middle portion 25 which is adjacent the end portion 24, and which does not overlap any waist panel, and an opposing end portion 26, which overlaps the back waist panel 14.

The back waist panel 14 has a width W1 that is in one embodiment, the same or similar to that of the front waist panel 13 (and the absorbent article 10). The back waist panel 14 includes an overall length L1 1 that is in one embodiment, between about 50 and 700 mm, alternatively, between about 100 and 500 mm. In one embodiment, the overlapping portion of the absorbent assembly 22 that overlaps with the back waist panel 14 includes a width W11 of between about 50 and 450 mm, alternatively, between about 80 and 350 mm. In one embodiment, the overlapping portion of the absorbent assembly 22 that overlaps with the back waist panel 14 includes a length L12 of between about 30 and 600 mm, alternatively, between about 50 and 300 mm.

As with the front waist panel 13, the back waist panel 14 in the embodiment of Figure 1 A is also constructed of an elastic component that extends much if not all of the dimension of the back waist panel 14. In one embodiment, the elastic component that forms the two waist panels are stretch- bonded laminates (either of the same or different layer construction), such as an apertured film-based, stretch-bonded laminate, having stretch and recovery properties along the article transverse direction. In one embodiment, the chassis back waist panel 14 is breathable, but not liquid permeable, alternatively, breathable and liquid permeable. The back waist panel 14 includes activated elastic component zones Z6, Z7, Z8 and inactivated elastic component zones Z4, Z5. The absorbent assembly 22 is attached to the back waist panel 14 also along the backsheet layer 22C (garment- facing surface which is opposite to the viewer surface shown in the figure). Such means of attachment may be similar to that of the first waist panel 13. An outermost activated elastic component zone Z7 extends across much of the back waist panel dimensions. An intermediate positioned activated elastic component zone Z8 extends over much of the overlap between an absorbent assembly 22 end and the back waist panel 14 (but not over the absorbent layer). Unlike the configuration of the front waist panel 13 in Figure 1A, the elastic component of the outermost activated elastic component zone Z7 (and intermediate located activated elastic component zone Z8) extends continuously into a further activated elastic component zone Z6, which forms the ergonomic fit channel 29 of the article back waist panel 14. The activated elastic component zone Z6 of the back waist panel 14 making up the ergonomic fit channel 29, is positioned between two inactivated elastic component zones Z4, Z5 of the back waist panel 14, that are located on either side of the longitudinal centerline. The back waist inactivated elastic component zones Z4, Z5 like the inactivated elastic component zone Z3 of the front waist panel 13 is comprised of the elastic component of the panel that has been processed in some fashion to make it either inelastic or alternatively, less elastic than surrounding activated elastic component zones. It is illustrated with diamond patterns 28 in the figure (as in the front panel). Such diamond pattern illustrates the extent of the inactivated zone, and also a design for an ultrasonic bonding pattern (for films) or chopping roll pattern (for strands) that can be used to deaden the elastic component. Such pattern may in one embodiment, be seen at least from the backside view of the article (Figure 1 C), or in a further alternative embodiment, through the topsheet layer surface seen in Figure 1A.

The ergonomic fit channel 29 extends in one embodiment, from the intermediate activated elastic component zone Z8 to the edge 14C of the back waist panel 14. The inactivated elastic component zones Z4, Z5 of the back waist panel 14, are in one embodiment positioned about the central longitudinal direction Lc (longitudinal centerline) of the pants-type absorbent article 10, alternatively, symmetrically about the longitudinal centerline, and also at least partially over the peripheral edge 72 of the absorbent layer 22B, but include a gap therebetween which defines the channel 29. As illustrated, the gap is continuous between the inactivated elastic component zones Z4, Z5 and extends in one embodiment from the intermediate activated elastic component zone Z8 to the middle portion 77 of the crotch region or edge 14C. In one embodiment, the ergonomic fit channel 29 is aligned with the longitudinal centerline. Such ergonomic fit channel 29, may also be aligned with a recess 22H in the absorbent layer 22 above it. The ergonomic fit channel 29, has in one embodiment an outwardly flared opening 29A (flared outwardly away from the longitudinal centerline Lc) towards the end edge 14D of the back waist panel 14. This flared channel opening 29A assists in body conformance of the article along a wearer's intergluteal cleft region. It may be positioned adjacent to (and vertically aligned with) the absorbent layer recess 22H, as shown in the figure. The gap between inactivated elastic component zones Z4, Z5 which forms the ergonomic fit channel 29, is in one embodiment of a width W6 of between about 5 and 100 mm, alternatively, between about 10 and 60 mm. In one embodiment, the width W6 is constant along the full length L10 of the ergonomic fit channel 29.

Alternatively, the width varies along the length L10. In a further alternative embodiment, the width of the channel W6 may narrow between Z8 to edge 14C. In still a further alternative embodiment, the width W6 is between about 5 and 40 % of the width W7 of the absorbent layer 22B which overlaps the back waist panel 14. As illustrated, the gap, which provides the ergonomic fit channel 29 beneath the absorbent layer 22B in the back waist panel 14, urges or lifts the topsheet layer 22A, absorbent layer 22B, and backsheet layer 22C in this area upward, such that it is raised into the intergluteal cleft of a wearer of the article along the channel length (since the channel is filled with activated elastic material). Such lift provides uniform contact of the topsheet layer 22A and underlying absorbent layer 22B with that corresponding region on a wearer's anatomy. The ergonomic fit channel 29, includes in one embodiment, elastic component which provides the channel with transverse direction stretch and recovery properties in accordance with the directional arrows 200. Such elastic component may be for example stretch-bonded, film based laminate as previously described.

The length L10 of the ergonomic fit channel 29 on the back waist panel (which is also in one embodiment the length of the inactivated elastic component zones Z4, Z5), is between about 10 and 600 mm, alternatively, between about 15 and 300 mm. The length L10 of the ergonomic fit channel 29, may be in one embodiment, longer than the length of the absorbent layer 22B above it (in use). Longer ergonomic fit channels may be present in article designs, such as having the channel extend continuously from the back waist panel end edge 14D to the crotch, or alternatively continuously to the front waist panel if the front and back waist panels are formed from a unitary sheet (not shown). The ergonomic fit channel 29 is in one embodiment elongated and continuous, being without interruption by an inactivated elastic component zone along its length. In an alternative embodiment, the channel may be closed at one or both ends (as seen in later figures) such that an inactivated elastic component zone is placed (such as in a relatively narrow band) along one or both ends of the channel. In such an embodiment, the separated inactivated elastic component zones are actually connected to one another via the relatively narrow bands across the Lc.

The length of the absorbent layer 22B which overlaps the back waist panel 14, may in one embodiment L9, be between about 10 and 550 mm, alternatively, between about 30 and 350 mm, and the width of the absorbent layer 22B which overlaps the back waist panel 14, may in one embodiment W7 be between about 50 and 400 mm, alternatively, between about 80 and 300 mm.

In one embodiment, the absorbent layer 22B has a uniform thickness along the depth direction of an absorbent layer region, of between about 0 and 10 mm, alternatively between about 0 and 8mm, alternatively between about 2 and 8 mm, especially in the region of the absorbent layer that is overlapping with the back waist panel. It has been determined that in having a thickness above about 10 mm, negatively impacts the ability of the activated elastic component in the fit channel 29 to create the elevated region. In an alternative embodiment, the thickness of the absorbent layer 22B directly above (vertically aligned with) the ergonomic fit channel 29 is thinner than surrounding absorbent layer regions. For example, in one embodiment, the thickness of the absorbent layer 22B directly above (vertically aligned with) the ergonomic fit channel 29 is between about 0 and 10 mm, alternatively, between about 0 and 8 mm, while the thickness of the absorbent layer regions not vertically aligned with the ergonomic fit channel 29 is between about 1 and 10 mm, alternatively, between about 1 and 8 mm. Alternatively, the thickness of the absorbent layer region not vertically aligned with the channel (immediately adjacent the channel) may be smaller than the thickness of the absorbent layer region vertically aligned with the channel. In one such embodiment, the thickness of the absorbent layer region not vertically aligned with the channel may be between about 1 and 8 mm, while the thickness of the absorbent layer region vertically aligned with the channel may be between about 2 and 10 mm. In still a further alternative embodiment, the thickness difference between the absorbent layer region or portion in vertical alignment with the channel and the absorbent layer region or portion not in vertical alignment is greater than 10 %, alternatively, greater than 20 %.

In one embodiment, the total width W8 between the lateral-most outer edges of the inactivated elastic component zones Z4, Z5 is between about 40 and 500 mm, alternatively, between about 70 and 400 mm, whereas, in one embodiment, each of the individual inactivated elastic component zones Z4, Z5 of the back waist panel 14, have a width W9 of between about 15 and 200 mm, alternatively, between about 25 and 170 mm. The inactivated elastic component zones may in one embodiment, be of the same shape. Alternatively, they may be of different shapes. Alternatively, they may be of different dimensions. The inactivated elastic component zones Z4, Z5 are in one embodiment, partially surrounded by activated elastic component zones. They are not completely surrounded however, since neither the activated elastic component zone Z8, nor the ergonomic fit channel, activated elastic component zone Z6 extend around them in the middle crotch portion 77 of the pants-type absorbent article 10. The inactivated elastic component zones Z4, Z5 extend beyond the lateral-most edge 72 of the absorbent layer 22B on the back waist panel 14, by a width distance W10 in one embodiment, of between about (-) 10 and 100 mm, alternatively, between about (-) 5 and 50 mm. Such lateral extension of the zones beyond the peripheral edge of the absorbent layer (or other layer) may be of a uniform distance around the absorbent layer (or other layer) or may vary in distance. The inactivated elastic component zones Z3, Z4, Z5 may include an elastic component in which elasticity has been either completely inactivated or deadened such that the zone demonstrates no elasticity (ability to stretch and recover as defined), or alternatively, only partially inactivated, such that it demonstrates reduced elastic functionality when compared to either the elastic functionality of the activated elastic component region(s) immediately adjacent to it, or alternatively compared to the elastic functionality of the elastic component as originally formed. By complete or partial elimination of elastic functionality in the inactivated elastic component zones, different elastic tensions are applied over and around the area of the ergonomic fit channel 29. Such tensions help create an outwardly smooth appearance and reduced absorbent layer deformation. In addition to previously described inactivation methods, by varying the density of ultrasonic bond points within these zones, zones of more or less elasticity may be created adjacent one another.

Generally, the ergonomic fit channel 29 provides an elasticity zone (or relatively higher level elasticity zone) within the waist chassis of the article (the lower abdominal region). This ergonomic fit channel 29 in particular, provides transverse direction stretch and recovery functionality in the back waist panel 14, which allows for the formation of the fit channel. If the activated elastic component of the ergonomic fit channel 29 is of a film-based stretch-bonded laminate in particular, the retraction of the elastic component on the absorbent layer is continuous and uniform in this area. The adjacent inactivated or deadened zones Z4, Z5 discourage the deformation of the absorbent layer 22B in this area, and help to create a smooth outer surface (which is reflected in a smooth article profile when viewed through a wearer's clothing). Therefore, the ergonomic fit channel 29 with transverse direction elasticity (alternatively, having both transverse and longitudinal direction elasticity) effectively pushes or extends article layers into the corresponding intergluteal cleft of the wearer and delivers comfort (because of reduced, lateral or vertical article movement) and improved visual discretion. By including a channel with a tapered opening 29A, such feature demonstrates increased adherence between a wearer's anatomy, regardless of a wearer's movements (whether sitting, prone, standing or walking). Such closer adherence to a wearer's anatomy also reduces likelihood of leakage as the absorbent layer is maintained in close proximity to the curved anatomy of the wearer.

In Figure 1 C, a back plan view of the pants-type, absorbent article 10 of the disclosure is seen with the backsheet layer surface 22C facing the viewer. The absorbent assembly middle portion 77 can be seen between panel edges 13C and 14C. The diamond pattern 28 of the inactivated elastic component zones may also be visible from this back plan view.

A transverse direction, exploded cross-sectional view of the pants-type absorbent article of Figure 1 A taken along lines 2A-2A, is shown in Figure 2A. As seen in the figure, side barriers or cuffs 22E are situated above and adjacent the lateral side edges of the topsheet layer 22A. Such may be attached to the topsheet layer 22A along the lateral-most side edges 22F by adhesive 170. The liquid impermeable backsheet layer 22C is situated beneath the absorbent layer 22B.

A longitudinal direction, exploded cross-sectional view of the pants-type absorbent article of Figure 1 A taken along lines 2B-2B, is shown in Figure 2B. At the back waist panel 14, an outermost activated elastic component zone Z7 is situated adjacent the back waist panel end edge 14D. An intermediate, activated elastic component zone Z8 is situated beneath the backsheet layer 22C, and an inactivated elastic component zone Z4 is situated adjacent the absorbent layer and terminates at the edge 14C.

A longitudinal direction, exploded cross-sectional view of the pants-type absorbent article of Figure 1 A taken along lines 2C-2C, is shown in Figure 2C. As seen in the figure, the front waist panel 13 includes an inactivated elastic component zone Z3 vertically beneath (approximately) the absorbent layer 22B and terminating at the end edge 13C, an intermediate activated elastic component zone Z2 (vertically beneath the backsheet layer 22C) is positioned adjacent the inactivated elastic component zone Z3, and towards the front waist panel end edge 13D. An outermost activated elastic component zone Z1 is adjacent zone Z2. At the back waist panel 14, an outermost activated elastic component zone Z7 is situated adjacent the back waist panel end edge 14D. An intermediate, activated elastic component zone Z8 is situated beneath the backsheet layer 22C, and an additional activated elastic component zone Z6 is situated approximately beneath the absorbent layer 22B, and terminates at edge 14C. The additional activated elastic component zone Z6 connects with, and extends continuously from other activated elastic component zones Z7, Z8. It terminates at edge 14C. By being affixed to adjacent layers at approximately edge 14C and also along the article length towards end edge 14D, the zone Z6 continues to provide lift to the layer(s) vertically above it, such that the above layers 22A, 22B, 22C rise in use into the corresponding intergluteal cleft of the wearer of such article. In one embodiment of the pants-type absorbent article, the zone Z6 (zone of activated elastic component that is partially surrounded by inactivated elastic component zones Z4, Z5 and which forms the ergonomic fit channel 29) is attached to adjacent layers by being adhesively attached. As can be seen in Figure 2C, 2D, zone Z6 forms an ergonomic fit channel that elevates layers vertically above it (along the article depth direction) such that zone Z6, having a relatively narrow width, allows the article to remain in place adjacent a wearer's anatomy, along a discrete area of the article.

As seen in the transverse direction, exploded cross-sectional view of Figure 2D, the ergonomic fit channel 29 (elastic component zone Z6) of the back waist panel 14 vertically lifts that portion of the pants-type, absorbent article that corresponds to the wearer's intergluteal cleft, such that the absorbent layer 22B and topsheet layer 22A of the absorbent assembly 22 initially rise into, and are subsequently maintained within the intergluteal cleft of the wearer. The inactivated elastic component zones Z4, Z5 keep the surrounding area profile smooth, when viewed through a wearer's clothing, while the elastic component in the ergonomic fit channel, which is anchored on one end to the surrounding elastic component zones and on the other end, at the edge of the back waist panel, remains under tension, so as to provide a conforming fit. In one embodiment, the ergonomic fit channel 29 is elevated to a three- dimensional shape in the pants-type, absorbent article while the article is in a pre-use condition.

Alternatively, such ergonomic fit channel 29 elevates to a three-dimensional shape while the article is being worn by a wearer.

A photograph of a backside view of a pants-type, absorbent article 10 in accordance with the disclosure can be seen in Figure 4. In such figure, the absorbent article 10 has been placed on a mannequin and the ergonomic fit channel 29 is clearly visible corresponding to the intergluteal cleft region of the wearer's anatomy. The respective elastic component zones of the back waist panel can also be seen, with the inactivated elastic component zones Z4, Z5 of the back waist panel partially surrounding the ergonomic fit channel 29 (with flared opening 29A), and with the partially surrounding elastic component zones Z7, Z8 of the back waist panel extending beyond the inactivated elastic component zones Z4, Z5. The protrusion (ridge-like feature) formed from the ergonomic fit channel 29 on the back waist panel, extends into the mannequin's corresponding intergluteal cleft region. Such arrangement eliminates gathers and bulges from the backside of the absorbent article, creating a smooth and form-fitting appearance. This elastic component zone arrangement and resulting body conformance differs markedly from the elastic material placement of article 2 illustrated in Figure 3, and the resulting gathered and bulky appearance of that article.

As seen in the top plan view of Figure 5 (with topsheet layer 22A surface facing the viewer), an alternative embodiment of a pants-type absorbent article 110 of the disclosure includes a front waist panel 13 and back waist panel 14 each having a respective ergonomic fit channel 29, 29C formed from an activated elastic component zone Z6, Z10 respectively between inactivated elastic component zones Z4, Z5 (for back waist panel 14) and Z11 , Z12 (for front waist panel 13). The various zones between the front and back waist panels may or may not be of the same dimensions, although in one alternative embodiment, each of the back waist panel respective zones are larger than those of the front waist panel.

A series of alternative ergonomic fit channel designs are illustrated in Figures 6A-6F. As seen in the prior figures, the ergonomic fit channel 29 may be an open and continuous channel 29 that completely separates two adjacent, inactivated elastic component zones Z4, Z5 and which extends continuously from a partially surrounding activated elastic component zone Z8 to the back waist panel edge 14C. Alternatively, such channel may be elongated and continuous, but surrounded by inactivated elastic component zones.

Essentially an activated elastic component zone partially surrounds and divides the inactivated elastic component zones on the back waist panel 14. The ergonomic fit channel can be closed at one or both ends. A closed end ergonomic fit channel is illustrated in Figure 6A, with the channel being triangular in shape by the joining of two inactivated elastic component zones Z13, Z14 located towards the back waist panel edge 14C. A top plan view of an alternative embodiment of a pants-type, absorbent article 210, is shown in Figure 6A, in which embodiment an ergonomic fit channel that is completely flared and having a flared opening 29D is positioned between the inactivated elastic component zones. Inactivated elastic component zone walls 11 1 , 1 12 taper towards one another to close the fit channel 29 at one end 187. The inactivated elastic component zones Z13, Z14 of the figure extend beyond the peripheral edge 73 of the backsheet layer 22C (and topsheet layer 22A) of the absorbent assembly 22. In Figure 6B, a top plan view of a further alternative embodiment of a pants-type, absorbent article 310 is illustrated. The ergonomic fit channel 29E has a closed end with perpendicular-walled, inside corners 113, 1 14 defined by the inactivated elastic component zones Z15, Z16 and the straight, channel interior-facing end wall 31. In the figure, the inactivated elastic component zones terminate inside the peripheral edges 70, 73 of the backsheet layer 22C (and topsheet layer 22A) of the absorbent assembly 22. In Figure 6C, a further alternative embodiment 410 of a pants-type, absorbent article is shown. The ergonomic fit channel 29F has straight interior side walls 115, and curved lateral-most side walls 116 on the inactivated elastic component zones define the peripheral edges of the inactivated elastic component zones Z17, Z18. The inactivated elastic component zones terminate short of the peripheral edge 73 of the backsheet layer 22C (and topsheet layer 22A) of the absorbent assembly 22. Figure 6D, illustrates another alternative embodiment of a pants-type absorbent article 510, in which the ergonomic fit channel 29G is defined by straight interior walls 117 of the inactivated elastic component zones Z19, Z20. Lateral-most side walls 118 on the inactivated elastic component zones Z19, Z20 define more rectangularly-shaped zones. The front panel 13 also includes a rectangularly shaped inactivated elastic component zone Z21 . Each of the inactivated elastic component zones terminate short of the peripheral edge 73 of the backsheet layer 22C (and topsheet layer 22A) of the absorbent assembly 22. In still a further alternative embodiment as seen in Figure 6E, which shows a top plan view of a pants-type absorbent article 550 of the disclosure, the ergonomic fit channel 29H is an elongated and continuous channel which is surrounded by portions of the inactivated elastic component zones Z22, Z23. Such zones terminate short of the peripheral edge 73 of the backsheet layer 22C (and topsheet layer 22A) of the absorbent assembly 22. If such elongated and continuous channel is closed at both ends as with 29H, such channel is in one embodiment between about 10 and 600 mm in length, alternatively, between about 15 and 300 mm in length. In Figure 6F a top plan view of an alternative embodiment of a pants-type, absorbent article 560 is also illustrated, in which the inactivated elastic component zones Z24, Z25, Z26 are of dimensions that are shorter and narrower than the peripheral edge of the absorbent layer 22B of an absorbent assembly 22. An ergonomic fit channel is illustrated as 29i.

It should therefore be noted that the inactivated elastic component zones of the back waist panel (and also of the front waist panel) may be positioned both over the absorbent layer 22B ends and a portion of the backsheet layer 22C outer edges of an absorbent assembly, 22, alternatively, may be sized to be smaller than the outer dimensions of a backsheet layer 22C, but larger than an absorbent layer 22B of an absorbent assembly, or alternatively, smaller than the outer dimensions of an absorbent layer 22B of an absorbent assembly.

While in some of the illustrated embodiments, the edges of the inactivated elastic component zones are shown as straight edges, with the ergonomic fit channel being defined by straight side walls and of a generally rectangular shape (by the inactivated elastic component zones), such channels may instead be more ergonomic in shape if they include outwardly flared openings (such as feature 29A), which even more desirably are curved, outwardly flared shapes (such as in Figures 1 A and 6A) allowing for closer conformance of the article along the intergluteal cleft region of a wearer's curved anatomy.

In a further alternative embodiment of the invention as shown in Figure 1 D, which illustrates from a top plan view, an alternative absorbent assembly 23 that may be used in conjunction with the ergonomic fit channel of the disclosure, the alternative absorbent assembly 23 may include a variety of basis weights (contained in different basis weight regions 150, 151 ) of absorbent material within or across the transverse direction of the absorbent layer 22B, or alternatively, densified regions within the absorbent layer 22B, which enhance the performance/functionality of the ergonomic fit channel 29. Such different basis weight or densified regions may be vertically aligned with the ergonomic fit channel 29 for enhanced performance of the ergonomic fit channel 29. Such differentiated basis weight, embossed (density), or thickness regions across the transverse direction of the absorbent layer 22B, may be via a gradual gradient (not shown), or an abrupt gradient (such as the step-like gradients seen in Figures 1 E-1 G for example). For instance, a region 150 may be of a lower basis weight, immediately surrounded by regions 151 of a higher basis weight within the absorbent layer 22B, which lower basis weight region is aligned with the ergonomic fit channel 29 and which allows the activated elastic component region Z6 to more easily lift the absorbent layer 22B and topsheet layer 22A into the corresponding intergluteal cleft of the wearer. For example, the longitudinally directed, different basis weight region 150, defined by outer edge 152, may extend partially across the transverse direction (and be aligned along the longitudinal centerline) of the absorbent layer between about 1 and 99 % of the width W7 of the absorbent layer 22B on the back waist panel 14. The different basis weight region 150 may differ in basis weight from the adjacent regions 151 in one embodiment, by 10 % or more. The basis weight of the different basis weight region 150 may in one embodiment range from 0 to 500 gsm, alternatively from 0 to 400 gsm (it being understood that a "0" value shall be for a region of the absorbent layer in which there is actually no absorbent material, such as at a spatial gap or opening in the absorbent layer structure). It should also be recognized that the absorbent layer 22B may in fact comprise one or multiple layers. Alternatively, the absorbent layer basis weight of the region 150 that is vertically aligned with the channel 29A may be higher than surrounding regions 151 . For example, smaller basis weights within region 150 may range from 0 to 250 gsm, while larger basis weights within region 150 may range from 250 to 400 gsm.

In still a further alternative embodiment, the absorbent layer 22B may be purposely shaped so as to totally exclude absorbent material in the area of the absorbent layer 22B that is vertically aligned with the ergonomic fit channel 29, such that the activated elastic component zone Z6 in the channel need only to lift up either the backsheet layer (if present) and/or only the topsheet layer 22A into the intergluteal cleft region of the wearer. Such absorbent layer may be shaped so as to include two separated arm-like extensions not vertically aligned with the ergonomic fit channel (in the regions 151), or may include an elongated annular opening in the absorbent layer that is aligned with the ergonomic fit channel (not shown). Such annular opening may be for example, in the shape of an oval or rectangle. In such embodiments, the basis weight of the material in the absorbent layer region 150 would be 0 gsm. Such shaped absorbent layer would enhance the performance of the ergonomic fit channel 29. As seen in the figure, an embossing pattern 161 may be placed along the longitudinal centerline of the absorbent layer 22B, which embossing pattern 161 includes specific channels or pattern elements that are aligned with the ergonomic fit channel 29 on the longitudinal centerline Lc. Again, as with the feature of reduced absorbent material basis weight aligned with the ergonomic fit channel 29, such placement of embossing pattern 161 would enhance the ability of the ergonomic fit channel area to be urged up into the intergluteal cleft region of the wearer. Such embossing pattern may comprise a series of continuous lines 161 , 160 (as shown) or alternatively, a series of discrete but aligned shapes such as geometric shapes (i.e. dots, circles, triangles, or squares), shapes from nature (i.e. flowers, leaves), or other shapes (such as hearts), some of which may be aligned with the ergonomic fit channel 29, and some of which are placed adjacent to the ergonomic fit channel 29, such as at locations angled towards the ergonomic fit channel 29 as shown. Embossing techniques for absorbent layers are well known in the art and will therefore not be further described herein. It should be appreciated that the different basis weight regions 150 may be used concurrently with, or

independently from the embossing patterns 161 . Similarly, the embossments 161 , 160 may be used independently from the different basis weight regions 150. Furthermore, additional embossed regions 162 may be placed generally perpendicular to, and outside of the ergonomic fit channel 29 (at positions towards the back waist panel edge 14D), to provide additional barrier protection from leakage.

The differences in basis weights or embossing patterns between adjacent absorbent layer regions (including the presence or complete absence of absorbent material and/or embossing patterns) may create lines of weakness to enhance the ability of the activated elastic component zone Z6 to urge the layers above it (in the article depth direction) towards the intergluteal cleft region of a wearer. Such differences will at least create an elongated three-dimensional shape in the back waist panel 14, which forms a protrusion or ridge facing the wearer and extending within the intergluteal cleft region.

The above alternative embodiments of absorbent layers and absorbent assemblies, are illustrated in the transverse direction, exploded cross-sectional views of Figures 1 E, 1 F, 1 G, which illustrate alternative embodiments of the absorbent layer and assembly of Figure 1 D. For example, as seen in Figure 1 E, the thickness of the absorbent layer region 150, defined between edges 152 is less than that of the surrounding absorbent layer region 151 . Surrounding edge 152 creates a line of weakness in the absorbent layer 22B which can assist in the lifting of the layer upward by the activated elastic As seen in Figure 1 F, the thickness of the absorbent layer region 150, defined between edges 152 is larger than the surrounding absorbent layer region 151 . As seen in Figure 1 G, the thickness of the absorbent layer region 150 is non-existent, as the core includes in this embodiment, two longitudinally extending arms 151 which extend about two sides of an empty space. The topsheet layer 22A and backsheet layer 22C extend across the empty space, when such an embodiment of an absorbent assembly is to be used

In yet a further alternative embodiment of a pants-type absorbent article 610 of the invention as seen in the top plan view of Figure 7, visually apparent features 176, 177 may be added to either laterally adjacent regions of the topsheet layer 22A, absorbent layer 22B, regions of the front and/or back waist panels 13, 14 themselves, laterally adjacent regions of the backsheet layer 22C, or a combination thereof, so as to provide visual emphasis of the presence of the ergonomic fit channel 29 in the article. For instance, the partially surrounding intermediate activated elastic component zone Z8 may differ in color, printed pattern, or texture 177 from the color, printed pattern, or texture 176 of the inactivated elastic component zones Z4, Z5. Such differentiation can help to highlight the difference in functionality between the adjacent zones, and also assist in the placement of the ergonomic fit channel 29 of the article in alignment with the corresponding intergluteal cleft of a wearer.

In one embodiment, the pattern of ultrasonic bonding used to inactivate the inactivated elastic component zones may be distinctive such that it stands out visually from surrounding zones. Such differentiation can be in one embodiment, observed from either the topsheet layer surface, the back waist surface (as in Figure 1 C) or both surfaces. Alternatively, the back waist panel 14 may be colored or printed with a design which is altered in the inactivated elastic component zones by the inactivation process. For example, a printed back waist panel 14 may be of a particular color that is regionally lightened by the step of inactivation. Finally, a longitudinally directed printed pattern may be placed only along the opposing longitudinally directed side edges of the backsheet layer 22C, such that the ergonomic fit channel 29 is highlighted between the opposing printed side edges (not shown).

In still a further alternative embodiment, all of the activated elastic component zones of a pant-type absorbent article of the disclosure, are formed from a stretch-bonded laminate having an elastic film as the elastic layer and demonstrating stretch and recovery properties along the article transverse direction, while the inactivated elastic component zones of the article are formed from the same stretch-bonded film laminate material that has been exposed to ultrasonic bonding, in order to remove elasticity, or reduce elasticity with respect to adjacent activated elastic component zones.

As previously defined, elastic material is capable of stretching (or extending) and then recovering (or retracting) at least a portion of the stretched distance, once a stretching (or biasing) force is removed. In one embodiment, the ergonomic fit channel elastic component (of the activated elastic component zone Z6) has a tensile strength of between about 10 and 500 gf/inch, as strength values below about 10 gf/inch are not sufficient to form the three-dimensional raised feature (as seen in Figure 2D) of the channel in the back waist panel 14. Strength values above 500 gf/inch are expected to negatively impact the fitness of the panel within the intergluteal cleft region as such material would be too rigid to extend within the cleft region. Such values are given in the transverse direction of the material making up the activated elastic component zone Z6 and can be measured using a standard general tension meter/device (measured at the 50 % elongation point). It should be noted that while it is contemplated that a single material will form the back (and front) waist panel, having select, inactivation zones, multiple materials may also be used across the transverse direction of the pants-type absorbent article, but still having select, inactivation zones adjacent an ergonomic fit channel 29, so as to improve article fit and absorbency (such as by selectively reducing absorbent layer deformation).

The liquid permeable topsheet layer 22A of the absorbent assembly 22 may be manufactured from any number of conventional materials commonly used as a wearer-facing surface on an absorbent article. For example, non-limiting examples of such topsheet layer materials include fibrous nonwoven sheet materials, such as spunbond, spunlace, meltblown, and carded web materials (such as thermally bonded carded webs (TBCW), through-air bonded carded webs (TABCW)), fibrous woven sheet materials, apertured polyolefinic film or apertured fibrous nonwoven materials (single and dual apertured), and laminate combinations of the foregoing materials. Further, monolayered or multilayered sheet materials of the foregoing can also be used as the liquid permeable topsheet layer 22A. Particularly, carded web materials may be made from staple, bicomponent fibers as are known in the art. Materials that may be used in the topsheet layer 22A include synthetic fibers, such as polyolefinic materials. Such topsheet layers 22A may themselves be embossed. Suitable topsheet layer materials include, but are not limited to those described in United States Patent Nos. 4,397,644 to Matthews et al., 4,629,643 to Curro et al, 5,188,625 Van Iten et al., 5,382,400 to Pike et al, 5,533,991 to Kirby et al., 6,410,823 to Daley et al., and United States Publication 2012/0289917 to Abuto et al., each of which is hereby incorporated by reference thereto in its entirety to the extent not inconsistent with this disclosure. The topsheet layer 22A may also be treated so as to impart other properties to the wearer-facing surface. Examples of additional treatments include application of skin health agents, coloring agents, odor control agents, stain masking agents and the like. The basis weight of nonwoven webs to be used as liquid permeable topsheet layers 22A may generally vary, such as from about 5 grams per square meter ("gsm") to 150 gsm, in some embodiments from about 10 gsm to about 125 gsm, and in some embodiments, from about 15 gsm to about 120 gsm.

Desirably in one embodiment, the topsheet layer 22A is a polypropylene spunbond layer having a basis weight of between about 8 and 20 gsm. Such topsheet layer 22A may be bonded to the absorbent layer 22B in regions of contact, and/or to the backsheet layer 22C. In one embodiment, it may be unbonded to the absorbent layer in the fit channel 29 area, such that it essentially floats above the fit channel, especially if the absorbent layer 22B region vertically aligned with the fit channel is of a lower basis weight 150 than surrounding absorbent layer regions 151 .

As noted, optionally, a fluid transfer or surge layer may be positioned within the absorbent article between the liquid permeable topsheet layer 22A and the absorbent layer 22B. Such additional fluid transfer layers include, but are not limited to, bonded carded webs, hydroentangled nonwoven webs, or spunbond webs.

The absorbent layer 22B of the absorbent assembly 22 can itself comprise a single layer or multiple layers and these one or more layers can themselves comprise similar or different materials, although a single layer of homogenous composition material is desirable in one embodiment. Highly absorbent layers often include, but are not limited to, hydrophilic batts or webs containing wood pulp fibers, superabsorbent particles or fibers (known as SAP or SAM), synthetic wood pulp fibers, synthetic fibers, coform materials, hydrophilic foam materials, and combinations thereof. The absorbent layer 22B may comprise any one of a number of materials and structures, the particular selection of which will vary with the desired loading capacity, flexibility, body fluid to be absorbed and other factors known to those skilled in the art. By way of example, suitable materials and/or structures for the absorbent layers include, but are not limited to, those described in United States Patent Nos. 4,610,678 to Weisman et al, 6,060,636 to Yahiaoui et al., 6,610,903 to Latimer et al, 7,358,282 to Krueger et al, and United States Patent Publication 2010/0174260 to Di Luccio et al., each of which is hereby incorporated by reference thereto in its entirety to the extent that it is not inconsistent with this disclosure.

The shape of the absorbent layer 22B (while generally shown as a dog bone configuration to generally mimic the outer peripheral shape of the absorbent assembly 22 can vary as desired and can comprise any one of various shapes including, but not limited to, generally triangular, rectangular, and elliptical shapes. In one embodiment, the absorbent layer 22B has a shape that generally corresponds with the overall peripheral shape of the absorbent assembly 22 such that the absorbent layer 22B terminates proximate the peripheral edge of the absorbent assembly prior to a peripheral seal region. Desirably in one embodiment, the absorbent layer is a fluff layer mixed with SAP, and in which the SAP component is between about 0 and 80 percent of the basis weight of the absorbent layer such that it may be more easily urged into the intergluteal cleft region by the ergonomic fit channel 29.

Generally, in one embodiment, the SAP content is between about 0 and 20 percent of the basis weight of the absorbent layer for feminine care-related absorbent articles, between about 40 and 70 percent of the basis weight of the absorbent layer for adult incontinence care-related absorbent articles, and between about 50 and 80 percent of the basis weight of the absorbent layer for childcare-related absorbent articles.

As noted, the individual layers comprising the pants-type absorbent article 10 can be attached to one another using means known in the art such as adhesive, heat/pressure bonding, ultrasonic bonding and other suitable mechanical attachments. Commercially available construction adhesives usable in the present invention include, for example Rextac adhesives available from Huntsman Polymers of Houston, Tex., as well as adhesives available from Bostik Findley, Inc., of Wauwatosa, Wis.

The liquid impermeable backsheet layer 22C of the absorbent assembly 22 functions to isolate absorbed fluids from the wearer's garments or bedding, and therefore desirably can comprise a variety of liquid-impervious materials. In one aspect, the liquid impermeable backsheet layer 22C may optionally comprise a material that prevents the passage of liquids but allows air and water-vapor to pass there-through. The liquid impermeable backsheet layer 22C can comprise a single layer or multiple layers, and these one or more layers can themselves comprise similar or different materials. Suitable liquid impermeable backsheet layer 22C materials include, but are not limited to, polyolefin films, nonwovens, nonwoven laminates, and film/nonwoven laminates. The particular structure and composition of the liquid impermeable backsheet layer 22C may be selected from various known films and/or fabrics with the particular material being selected as appropriate to provide the desired level of liquid barrier, strength, abrasion resistance, tactile properties, aesthetics (such as texture and printability) and so forth. Suitable backsheet layer materials include, but are not limited to, those described in United States Patent Nos. 4,376,799 to Tusim et al., 4,578,069 to Whitehead et al, 5,695,849 to Shawver et al, 6,075,179 et al. to McCormack et al., and 6,376,095 to Cheung et al., each of which is hereby incorporated by reference thereto in its entirety, to the extent it is not inconsistent with this disclosure. The liquid impermeable backsheet layer 22C may be breathable or nonbreathable, as may be desired. The backsheet layer 22C may also be elastic themselves, which may in one embodiment, be partially inactivated in the regions noted, where the front and back waist panels are inactivated. In one embodiment, the liquid impermeable backsheet layer 22C is a breathable polyolefinic film having a basis weight of between about 18 and 40 gsm, alternatively between about 20 and 30 gsm, such as of a polyethylene film.

The waist panels of the chassis may be formed from any a variety of described elastic materials, such as for example, stretch-bonded laminates, necked stretch-bonded laminates, elastic nonwoven sheets, and elastic film sheets. In one particular embodiment, such chassis is a unitary sheet that forms both the front and back waist panels of the pants-type absorbent article, and the absorbent layer and topsheet layer have dimensions that are both shorter and narrower than the longitudinal and transverse dimensions of the unitary chassis sheet. In an alternative embodiment, the chassis is formed from spaced apart (and separated) front and back waist panels, such as that illustrated in Figure 1 A. In one embodiment, such front and back waist panels are formed from a stretch bonded laminate such as that described in the previously noted reference to Siqueira at al. That is, the panels would be formed entirely from such materials, with the inactivated elastic component zones of the panels formed from ultrasonic bonding in regions adjacent an ergonomic fit channel.

The ergonomic fit channel of the chassis back panel provides enhanced comfort to wearers by introducing lift in the region of the article corresponding to the intergluteal cleft of the wearer's anatomy. Such elastic lift, positioned between two elastically deadened regions, avoids absorbent layer deformation and produces a smooth article profile when viewed through a wearer's outer garments, thereby enhancing article discretion. Furthermore, the ergonomic fit channel conforms to the curvature of the body, increasing article adherence to the body during various movements and activities in a wearer's day. The ergonomic fit channel urges the topsheet layer and absorbent layer to maintain close proximity and uniform contact with the body at the intergluteal cleft, thereby providing enhanced protection from exudate leakage. Such channel maximizes adherence of the raised portion of the topsheet layer, absorbent layer, backsheet layer and at least back waist panel to a wearer's body, assisting in keeping the entire article in place. By utilizing an elastic component having transverse direction elasticity in the channel, and optionally also longitudinal direction elasticity, such channel maintains its elevated, three-dimensional shape throughout the period of use of the article and uniformly minimizes spatial gaps between a wearer's body in this curved body region, and the article.

While the invention has been described in detail with respect to the specific embodiments thereof, it will be appreciated that those skilled in the art, upon attaining an understanding of the foregoing, may readily conceive of alterations to, variations of, and equivalents to these embodiments. Accordingly, the scope of the present invention should be assessed as that of the appended claims and any equivalents thereto.

Claims

What is claimed is:

1. A pants-type, absorbent article having a longitudinal direction, a transverse direction, a depth direction, and a longitudinal centerline, said pants-type, absorbent article having a waist region for enveloping the lower abdomen of a wearer, and a crotch region for positioning adjacent the crotch of a wearer, said pants-type, absorbent article comprising: a chassis forming the waist region and including a front waist panel for placement adjacent a wearer's abdomen front, and a back waist panel for placement adjacent a wearer's abdomen back, an absorbent assembly forming the crotch, and having two longitudinal ends, said absorbent assembly including at least a liquid permeable topsheet layer and an absorbent layer, said absorbent assembly overlapping with, and attached to said front and back waist panels, such that at least a portion of said absorbent layer overlaps with said back waist panel, said back waist panel having an activated elastic component in an activated elastic component zone, and further having two inactivated elastic component zones formed from inactivated elastic component, at least partially surrounded by said activated elastic component zone, said inactivated elastic component zones being positioned on either side of said longitudinal centerline and including a gap there between, an ergonomic fit channel being formed within said gap, wherein said activated elastic component continues from said activated elastic component zone into said gap, whereby said ergonomic fit channel including said activated elastic component, forms a three- dimensional protrusion within said back waist panel that can extend within a corresponding intergluteal cleft region of a wearer of said article.

2. The pants-type, absorbent article of claim 1 , wherein said absorbent layer includes

differentiated regions, and at least one differentiated region of said absorbent layer is vertically aligned with said ergonomic fit channel along the depth direction.

3. The pants-type, absorbent article of claim 1 , wherein said activated elastic component provides at least transverse direction stretch and recovery to said pants-type, absorbent article.

4. The pants-type, absorbent article of claim 1 , wherein said activated elastic component

provides at least transverse direction stretch and recovery to said pants-type, absorbent article, alternatively, transverse direction stretch and recovery and longitudinal direction stretch and recovery to said pants-type, absorbent article.

5. The pants-type, absorbent article of claim 1 , wherein said activated elastic component is selected from the group consisting of elastic strands, elastic webs, elastic yarns, elastic ribbons, elastic films, and laminates of the foregoing elastic materials.

6. The pants-type, absorbent article of claim 1 , wherein said two inactivated elastic component zones are symmetrically shaped.

7. The pants-type, absorbent article of claim 1 , wherein said two inactivated elastic component zones are of the same shape and size.

8. The pants-type, absorbent article of claim 1 , wherein said two inactivated elastic component zones are symmetrically shaped and positioned on either side of said longitudinal centerline.

9. The pants-type, absorbent article of claim 1 , wherein said ergonomic fit channel is a

continuous channel along said back waist panel.

10. The pants-type, absorbent article of claim 1 , wherein said absorbent assembly further includes a liquid impermeable back sheet layer that is bonded to said topsheet layer, and which seals and sandwiches said absorbent layer there between.

11 . The pants-type, absorbent article of claim 1 , wherein said front and back waist panels are spaced apart from one another.

12. The pants-type, absorbent article of claim 1 , wherein said activated and inactivated elastic component is formed from a film-based, stretch bonded laminate material.

13. The pants-type, absorbent article of claim 1 , wherein said front waist panel also includes an activated elastic component zone including an activated elastic component.

14. The pants-type, absorbent article of claim 13, wherein said absorbent layer has a longitudinal end that overlaps with said front waist panel, said front waist panel further including two spaced apart, inactivated elastic component zones of inactivated elastic component positioned symmetrically on either side of said longitudinal centerline, and that are at least partially surrounded by said activated elastic component zone, and in which said activated elastic component extends in a channel between said spaced apart inactivated elastic component zones.

15. The pants-type, absorbent article of claim 1 , wherein said absorbent layer overlaps with said back waist panel and includes a line of weakness that is vertically aligned with said ergonomic fit channel along the depth direction.

16. The pants-type, absorbent article of claim 15, wherein said absorbent layer includes adjacent absorbent layer regions, each of which overlap with said back waist panel, and said line of weakness is formed from either a density gradient between said adjacent absorbent layer regions, a thickness gradient between said adjacent absorbent layer regions, a basis weight gradient between said adjacent absorbent layer regions, or a combination thereof.

17. The pants-type, absorbent article of claim 1 , wherein said absorbent layer includes regions having higher and lower basis weights, with a region having lower basis weight being vertically aligned with both said longitudinal centerline and said ergonomic fit channel along said back waist panel along the depth direction.

18. The pants-type, absorbent article of claim 1 , wherein said inactivated elastic component zones, and said activated elastic component zone within said ergonomic fit channel, are visually distinguished from one another based either on the zones having different print patterns, different coloration, different bond patterns, or a combination thereof.

19. The pants-type, absorbent article of claim 1 , wherein said activated elastic component zone within said ergonomic fit channel includes straight walls within said channel, defined by said inactivated elastic component zones.

20. The pants-type, absorbent article of claim 1 , wherein said activated elastic component zone within said ergonomic fit channel includes an outwardly flared opening to said channel.

21 . The pants-type, absorbent article of claim 1 , wherein said absorbent article is refastenable.

22. The pants-type, absorbent article of claim 1 , wherein said inactivated elastic component of said inactivated elastic component zones is inactivated by exposure to either mechanical processes, heat, pressure, chemical changes, ultrasonic energy, or a combination thereof.

23. The pants-type, absorbent article of claim 1 , wherein said absorbent layer includes an

embossed pattern that is vertically aligned with said ergonomic fit channel.

24. A pants-type, absorbent article having a longitudinal direction, a transverse direction, a depth direction, and a longitudinal centerline, said pants-type, absorbent article having a waist region for enveloping the lower abdomen of a wearer, and a crotch region for positioning adjacent the crotch of a wearer, said pants-type absorbent article comprising: a chassis forming the waist region and including a front waist panel for placement adjacent a wearer's abdomen front, and a back waist panel for placement adjacent a wearer's abdomen back, an absorbent assembly forming the crotch, and having two longitudinal ends, said absorbent assembly including at least a liquid permeable topsheet layer and an absorbent layer, said absorbent assembly overlapping with, and attached to said front and back waist panels at said longitudinal ends, such that at least a portion of said absorbent layer overlaps with said back waist panel, said back waist panel having an activated elastic component in an activated elastic component zone, with said activated elastic component comprising a film-based, stretch bonded laminate, and further having two inactivated elastic component zones formed from inactivated elastic component with said inactivated elastic component comprising a film-based, stretch bonded laminate at least partially surrounded by said activated elastic component zone, said inactivated elastic component zones being positioned on either side of said longitudinal centerline and including a gap there between, an ergonomic fit channel formed within said gap, wherein said activated elastic component continues from said activated elastic component zone into said gap, whereby said ergonomic fit channel, including said activated elastic component, forms a three-dimensional protrusion within said back waist panel that can extend within a corresponding intergluteal cleft region of a wearer of said article.

25. The pants-type, absorbent article of claim 24, wherein said absorbent layer includes

differentiated regions, and a differentiated region that is vertically aligned with said ergonomic fit channel along the depth direction.