Pants-type absorbent products with composite isolation sheets

Abstract

Disclosed is an absorbent article having longitudinal and transverse dimensions, comprising a front elastic band, a rear elastic band, and a crotch area, wherein the front and rear elastic bands are connected to a pair of side seams to form a waist opening and a pair of leg openings; the crotch area extends longitudinally between the front and rear elastic bands; the absorbent article includes an absorbent body extending the entire longitudinal dimension of the crotch area and also partially extending into each of the front and rear areas, the absorbent body comprising: 1) a water-permeable top sheet, 2) a water-impermeable bottom sheet, 3) an absorbent core disposed between the top sheet and the bottom sheet, and 4) a composite separator comprising: a) a pair of inner bands having a pair of side edges elasticated longitudinally by inner band elastic strands, and b) a front portion thereof. The front region has a front longitudinal endpoint and a pair of front opening edges, wherein the front opening edges do not contain elastic elements, wherein the front portion has a lateral longitudinal dimension F1 and a central longitudinal dimension F2, wherein F2 is about 30% to about 85% of F1, wherein the composite absorbent sheet is bonded to the wearer-facing side of the top sheet by a pair of main adhesive portions extending in the longitudinal direction and an auxiliary adhesive portion extending in the transverse direction between the main adhesive portions, the front elastic band is formed by an outer sheet, an inner sheet and a plurality of elastic strands extending in the transverse direction and sandwiched between the outer sheet and the inner sheet, the front elastic band includes a transfer elastic strand, the transfer elastic strand being at least one elastic strand superimposed on the front portion and the pair of main adhesive portions, wherein the absorbent core does not extend beyond the transverse edge of the main adhesive portion and does not extend beyond the front end of the auxiliary adhesive portion.

Description

Technical Field

[0001] This invention relates to trouser-type absorbent articles having a composite barrier for isolating bodily fluids from the wearer's skin. Background Technology

[0002] Absorbent products for personal hygiene, such as disposable diapers, disposable pants, and adult incontinence underwear, are designed to absorb and contain various bodily excretions, including urine, menstrual fluid, low-viscosity fecal matter, and solid fecal matter. When the wearer is sleeping, especially when sleeping on their side, it may be difficult to quickly isolate and contain urine. Furthermore, it is known that contact between feces and urine on the skin can cause skin irritation and redness, and sometimes even dermatitis.

[0003] Absorbent articles having a device for isolating urine are known in the art, such as those described in JP Publication 2001-252303A. While such absorbent articles are known, they have disadvantages that have hindered significant commercial success. For example, those absorbent articles known in the art may have a front isolator with an edge extending straight laterally, or may have elastic strands at the edge of the front isolator. This configuration for the front isolator may cause irritation to the wearer's genital area.

[0004] Based on the foregoing, there is a need for an absorbent article with a front insert to prevent urine leakage while maintaining containment and wearing comfort. There is also a need for such absorbent articles that can be manufactured economically. Summary of the Invention

[0005] This invention relates to an absorbent article having longitudinal and transverse dimensions, comprising a front elastic band, a rear elastic band, and a crotch area, wherein the front and rear elastic bands are connected to a pair of side seams to form a waist opening and a pair of leg openings; the crotch area extends longitudinally between the front and rear elastic bands; the absorbent article includes an absorbent body extending throughout the longitudinal dimension of the crotch area and also partially extending into each of the front and rear areas, the absorbent body comprising:

[0006] 1) A water-permeable top plate,

[0007] 2) Water-impermeable film,

[0008] 3) Absorbent core, which is disposed between the top sheet and the bottom sheet, and

[0009] 4) Composite separator, comprising:

[0010] a) A pair of inner hoops, the pair of inner hoops having a pair of side edges elasticated longitudinally by inner hoop elastic strands, and

[0011] b) A front portion having a front longitudinal endpoint and a pair of front opening edges in the front region, wherein the front opening edges do not contain elastic elements, wherein the front portion has a lateral longitudinal dimension F1 and a central longitudinal dimension F2, wherein F2 is approximately 30% to approximately 85% of F1.

[0012] The composite insulating sheet is bonded to the wearer-facing side of the top sheet via a pair of longitudinally extending main adhesive portions and an auxiliary adhesive portion extending laterally between the main adhesive portions. The front elastic band is formed by an outer sheet, an inner sheet, and multiple elastic strands extending laterally and sandwiched between the outer sheet and the inner sheet. The front elastic band includes a transfer elastic strand, which is at least one elastic strand superimposed on the front portion and the pair of main adhesive portions.

[0013] The absorbent core does not extend beyond the lateral edge of the main adhesive portion, nor does it extend beyond the front end of the auxiliary adhesive portion. Attached Figure Description

[0014] Although this specification concludes by specifically pointing out and clearly claiming the claims of the invention, which are considered to form part of the invention, it is believed that the invention will be better understood from the following description taken in conjunction with the accompanying drawings, wherein similar reference numerals are used to indicate substantially the same elements, and wherein:

[0015] Figure 1 This is a schematic perspective view of one embodiment of the absorbent article of the present invention.

[0016] Figures 2A to 2C This is a schematic plan view showing an embodiment of the absorbent article of the present invention with the surface facing the wearer, wherein the seams are removed and the surface is flat and unshrinked.

[0017] Figure 3 This is a graph showing the relationship between T1 and F1 of the composite separator of the present invention.

[0018] Figure 4A yes Figure 2A A schematic plan view showing the elastic element of the front elastic band beneath the absorbent body.

[0019] Figure 4B yes Figure 2C A schematic plan view showing the elastic element of the front elastic band beneath the absorbent body.

[0020] Figures 4C to 4F This is a schematic plan view of an embodiment of the composite separator of the present invention.

[0021] Figures 5A to 5D It is the section AA along the line. Figure 4AA schematic cross-sectional view of the composite separator.

[0022] Figure 6A It is cut along LX. Figure 2A A schematic cross-sectional view of the front area, in which the elastic strands are omitted.

[0023] Figure 6B It is cut along LX. Figure 2A A schematic cross-sectional view of the rear area, in which the elastic strands are omitted.

[0024] Figure 6C It is cut along LX. Figure 2B A schematic cross-sectional view of the rear area, in which the elastic strands are omitted.

[0025] Figures 7A to 7B yes Figure 2B A schematic plan view of the rear area, in which the rear portion is omitted.

[0026] Figure 7C It is a section taken along line BB. Figure 2B A schematic cross-sectional view of the rear area, where the rear portion is omitted.

[0027] Figure 8 This is a schematic diagram of an example of a hanging sample fixture based on the "Force Measurement of the Whole Product" section of this article.

[0028] definition

[0029] As used herein, the following terms shall have the meanings specified below:

[0030] "Absorbent articles" refers to wearable articles, such as trousers, adhesive diapers, incontinence underwear, and feminine hygiene underwear, which are constructed to absorb and contain various excretions, such as urine, feces, and menstrual fluids excreted from the body. "Absorbent articles" can also be used as outer coverings suitable for engagement with separate disposable absorbent inserts for providing absorption and containment functions, such as those disclosed in PCT Publication WO 2011 / 087503A.

[0031] "Pants" refers to disposable absorbent fabric with pre-formed waist and leg openings. Pants are put on by inserting the wearer's legs into the leg openings and pulling the pants up to the appropriate position around the wearer's lower body. Pants are also commonly referred to as "closed diapers," "pre-tightening diapers," "over-the-top diapers," "training pants," and "diaper pants."

[0032] "Longitudinal" refers to the direction that extends substantially perpendicularly from one waist edge of the article to the opposite waist edge and is usually parallel to the maximum linear dimension of the article.

[0033] "Horizontal" refers to a direction perpendicular to the longitudinal direction.

[0034] "Proximal" and "distal" refer to positions closer to or farther from the longitudinal center of the product, respectively.

[0035] "Wear-facing" and "clothing-facing" refer to the relative positions of components or the relative positions of the surfaces of a component or group of components, respectively. "Wear-facing" means that during wear, a component or surface is closer to the wearer than some other components or surfaces. "Clothing-facing" means that during wear, a component or surface is further away from the wearer than some other components or surfaces (i.e., the component or surface is closer to the wearer's clothing, which may be worn over a disposable absorbent material).

[0036] "Setting" refers to the positioning of a component in a specific location or position.

[0037] "Jointed" refers to configurations in which one element is directly fixed to another element by directly attaching it to the other element; it also refers to configurations in which one element is indirectly fixed to another element by attaching it to an intermediate member, which in turn attaches the intermediate member to another element.

[0038] A "membrane" refers to a sheet-like material in which the length and width of the material far exceed its thickness. Typically, membranes have a thickness of about 0.5 mm or less.

[0039] The terms “nonwoven fabric,” “nonwoven layer,” or “nonwoven fiber web” are used interchangeably to refer to engineered fiber components that are primarily planar and have been given a design-level structural integrity through physical and / or chemical means, but do not include weaving, knitting, or papermaking (as defined in ISO 9092:2019). Oriented or randomly oriented fibers are bonded together by friction and / or cohesive and / or adhesive forces. These fibers may be derived from natural or synthetic sources and may be short fibers, continuous filaments, or in-situ formed fibers. Commercially available fibers have diameters ranging from less than about 0.001 mm to greater than about 0.2 mm and come in several different forms, such as short fibers (known as chemically woven short fibers or chopped fibers), continuous monofilaments (filaments or monofilaments), untwisted continuous filament bundles (tows), and twisted continuous filament bundles (yarns). Nonwoven fiber webs can be formed by a variety of methods, such as meltblown, spunbond, solution spinning, electrospinning, carding, and air-jet spinning. The basis weight of nonwoven fiber webs is usually expressed in grams per square meter (g / m²). 2 (or gsm) indicates.

[0040] "Water-permeable" and "water-impermeable" refer to the permeability of a material within the intended use range of a disposable absorbent article. Specifically, the term "water-permeable" refers to a layer or layered structure having pores, openings, and / or interconnected void spaces that allows liquid water, urine, or synthetic urine to pass through its thickness without pressure. Conversely, the term "water-impermeable" refers to a layer or layered structure in which liquid water, urine, or synthetic urine cannot pass through its thickness without pressure (other than natural forces such as gravity). According to this definition, a water-impermeable layer or layered structure can be water vapor permeable, i.e., it can be "vapor permeable".

[0041] "Hydrophilic" describes a substrate surface that can be wetted by an aqueous fluid (e.g., an aqueous body fluid) deposited on it. Hydrophilicity and wettability are typically defined based on the contact angle and permeability of the fluid, for example, through a nonwoven fabric. This is discussed in detail in the American Chemical Society publication entitled "Contact Angle, Wetability, and Adhesion" (copyright 1964), edited by Robert F. Gould. A substrate surface can be said to be wetted (i.e., hydrophilic) when the contact angle between the fluid and the surface is less than 90°, or when the fluid tends to spread spontaneously along the substrate surface; these two conditions often coexist. Conversely, if the contact angle is greater than 90° and the fluid does not spread spontaneously along the fiber surface, the substrate is considered "hydrophobic."

[0042] "Extensibility" and "stretchability" mean that the width or length of a component in a relaxed state can be extended or increased.

[0043] "Elastic" and "flexible" mean that a component includes at least a portion made of an elastic material.

[0044] The terms “elongable material,” “ductile material,” or “stretchable material” are used interchangeably and refer to materials that, when a biased force is applied, can be stretched to at least about 110% of their relaxed initial length (i.e., stretched to more than 10% of their initial length) without breaking or fracturing, and exhibit minimal recovery upon release of the applied force, i.e., recovery less than about 20% of their elongation without completely breaking or fracturing, the recovery being measured by EDANA method 20.2-89. In cases where such an elongable material recovers at least 40% of its elongation upon release of the applied force, the elongable material is considered “elastic” or “elastomer.” For example, an elastic material with an initial length of 100 mm can stretch to at least 150 mm and retract to a length of at least 130 mm upon removal of the force (i.e., exhibiting 40% recovery). In cases where the material recovers less than 40% of its elongation upon release of the applied force, the elongable material is considered “substantially inelastic” or “substantially non-elastic.” For example, an elongated material with an initial length of 100 mm can be stretched to at least 150 mm and shrink back to a length of at least 145 mm when the force is removed (i.e., exhibiting 10% recovery).

[0045] Unless otherwise specified, the “dimensions”, “length”, “width”, “spacing”, “diameter”, “aspect ratio”, “angle” and “area” of the article are measured in the following condition: the article is stretched to its full circumference W1, which is measured according to the “Full Article Force Measurement” in this document and using a ruler or a small magnifying glass.

[0046] "Original image" refers to a visual representation that is visible to the naked eye, provided through printing or other means, and possesses color. Printing includes various methods and equipment well known to those skilled in the art, such as offset printing, screen printing, flexographic printing, and gravure inkjet printing.

[0047] As used herein, “color” or “colored” includes any primary color other than white, namely black, red, blue, purple, orange, yellow, green, and indigo, as well as any variations thereof or mixtures thereof. According to the CIE L*a*b* color system, white is defined as those colors having an L* value of at least 94, an a* value equal to 0 ± 2, and a b* value equal to 0 ± 2. Detailed Implementation

[0048] Absorbent products

[0049] Figure 1 This is a perspective view of the absorbent article (20) of the present invention, and Figure 2ATo illustrate a schematic plan view of the absorbent article facing the wearer, the seams of the absorbent article are removed and it is in its flat, unshrinked state. The absorbent article (20) has a longitudinal center line LX that also serves as a longitudinal axis, and a transverse center line TX that also serves as a transverse axis. The absorbent article (20) has a wearer-facing surface, a garment-facing surface, a front elastic band (84), a back elastic band (86), a crotch area (30), and a side seam (32) that joins the front elastic band (84) and the back elastic band (86) to form two leg openings and a waist opening.

[0050] Absorbent articles (20) can be as follows Figure 1 , Figure 2A and Figure 2B The belted trousers include an absorbent body (38) for covering the wearer's crotch area (30), a front elastic band (84) and a rear elastic band (86) (hereinafter referred to as "front elastic band and rear elastic band"), forming a discrete annular elastic band (40) that extends laterally to define a waist opening. For belted trousers, the discrete annular elastic band (40) may also be referred to as an elastic band (40). For example... Figure 2A and Figure 2B For belted trousers, the front elastic band and the back elastic band (84, 86), along with the absorbent body (38), define the leg opening. For belted trousers, the front elastic band (84) is the front section (26), the back elastic band (86) is the back section (28), and the remaining portion is the crotch area (30). See also Figure 2C The absorbent article (20) may be a one-piece trousers, which is configured such that the elastic cover (40) forms the entire garment-facing surface of the article. For the one-piece trousers, the portions extending laterally between the side seams (32) are respectively considered as the front area (26) and the back area (28), and the remaining portions are the crotch area (30). For the one-piece trousers, the front area (26) is considered as the front elastic band (84), and the back area (28) is considered as the back elastic band (86).

[0051] The front and rear elastic bands (84, 86) of the article of the present invention serve to dynamically generate and distribute the dynamically generated force during wear. The front and rear elastic bands (84, 86) join together on the outer side of the side edge (89) to form a side seam (32), a waist opening, and two leg openings. Each leg opening may be provided with elasticity around its perimeter. The elasticity around the leg openings may be provided by leg elastomers (33F, 33B) disposed along the shaped crotch area of ​​the elastic cover (40), such as... Figure 2C As shown, or provided by a combination of elasticity from the front elastic band (84), the rear elastic band (86), and the absorbent body (38) and the bushing leg band (34), such as Figure 1 , Figure 2A and Figure 2B As shown.

[0052] The front elastic band (84) and the rear elastic band (86) are configured to impart elasticity in the transverse direction. See also Figures 6A to 6C and Figure 7C The front elastic band (84) and the rear elastic band (86) may each be formed from an inner sheet (94), an outer sheet (92), and a plurality of elastic members (96) extending laterally, as well as a fold (93), wherein the fold (93) is an extension of the inner or outer sheet material formed by folding the inner or outer sheet material at the distal edge (88) of the front and rear elastic bands; wherein the elastic members (96) are sandwiched between the two of these sheets. As discussed in further detail below, there may be more than one fold (931, 932). See also Figures 2A to 2C At least some of the elastic members (96) extend substantially parallel to each other in the transverse direction. All elastic members (96) may extend substantially parallel to each other in the transverse direction. See also Figures 4A to 4B The diagram shows an elastic member (96) of a front elastic band (84) that exists in an actively elastic manner beneath the absorbent body (38). At least 10%, or at least about 15% to no more than about 70%, of the front and rear elastic bands (84, 86) in the longitudinal direction from the waist opening may be an actively elastic laminate along the entire transverse dimension of the front and rear elastic bands (84, 86). For each front and rear elastic band (84, 86), the elastic activity of the region overlapping with the absorbent core (62) may be removed. Such regions where elastic activity is removed are referred to herein as “elastic cut windows,” and the remainder of the complete elastic member capable of imparting elasticity is defined as the “effective elastic length of the elastic member.”

[0053] The tensile stress (N / m) of the entire front and rear elastic bands (84, 86) can be distributed separately to provide the functional benefits of the invention, such as ease of stretching and wearing, while maintaining a specific force during wear to prevent the article from sagging after loading. When the elasticity of the front and rear elastic bands (84, 86) is provided by a plurality of elastic members (96) extending laterally, the tensile stress can be adjusted by one or more of the following methods: 1) the elongation of the elastic members (96); 2) the density (dentex) of the elastic members (96); 3) the longitudinal spacing of the plurality of elastic members (96); and 4) the effective elastic length of the elastic members (96) in the transverse direction. The term "elongation," specifically "0% elongation," refers to the initial length of the elastic member.

[0054] Absorbent subject

[0055] The absorbent body (38) of the present invention includes a water-permeable top sheet (24), a water-impermeable bottom sheet (25), and an absorbent core (62) disposed between the top sheet (24) and the bottom sheet (25). The top sheet (24) may be a water-permeable substrate. The bottom sheet (25) may be a water-impermeable membrane. See also Figures 2A to 2C and Figures 4A to 4B The absorbent body (38) includes an absorbent core (62) for absorbing and containing bodily effluent disposed on the absorbent body (38), and an absorbent material-deficient area (61) surrounding the absorbent core (62). The absorbent material-deficient area (61) may be made of materials selected from the group consisting of: a top sheet (24), a bottom sheet (25), materials forming an outwardly extending composite spacer (CIS), hoop materials, optional outer cover layers, and any combination thereof. Figures 2A to 2C In one embodiment, the absorbent body (38) has a generally rectangular shape, a left longitudinally extending side edge and a right longitudinally extending side edge, and a front laterally extending end edge and a rear laterally extending end edge (50). The absorbent body (38) extends the entire longitudinal dimension of the crotch area (30) and also partially extends into each of the front area (26) and the rear area (28).

[0056] Top film and negative film

[0057] The absorbent body (38) of the present invention includes a water-permeable topsheet (24) positioned to at least partially contact or be adjacent to the wearer. Suitable topsheets (24) can be made from a wide range of materials, such as porous foams; mesh foams; open-cell plastic films; or woven or nonwoven fiber webs composed of natural fibers (e.g., wood fibers or cotton fibers), synthetic fibers (e.g., polyester fibers or polypropylene fibers), or combinations of natural and synthetic fibers. Topsheets (24) are generally soft, gentle to the touch, and non-irritating to the wearer's skin. The topsheets (24) are water-permeable, allowing bodily fluids to easily permeate through the thickness of the topsheets (24). One type of topsheet (24) used herein is available under the trade name H30501221 from Fibertex NiLai, Malaysia or under the trade name SB1206169 from FQN Hazlet NJ. As is known in the art, any portion of the top sheet (24) may be coated with a lotion or skin care composition. The portion of the top sheet (24) that does not overlap with the composite spacer may be coated with a lotion. Examples of suitable lotions include those described in U.S. Patents 5,607,760; 5,609,587; 5,635,191; and 5,643,588.

[0058] The absorbent body (38) of the present invention includes a water-impermeable backing sheet (25) designed to prevent effluent absorbed by and contained within the absorbent core (62) from soiling articles that may come into contact with the absorbent article, such as sheets and underwear. The backing sheet (25) may be positioned such that it extends beyond the absorbent core (62) in both the longitudinal and transverse directions. Suitable backing sheet (25) materials include membranes, such as those manufactured by Plaster Argentina under the trade name PLBA NBBS10-12GSM PR V1. Other suitable backing sheet (25) materials may include a breathable material that allows vapor to escape from the absorbent article while still preventing effluent from passing through the backing sheet (25). Exemplary breathable materials may include materials such as woven fiber webs, nonwoven fiber webs, composite materials such as membrane-coated nonwoven fiber webs, and microporous membranes, such as those manufactured by Daika Japan under the trade name MPF DKH-180 15G V7 and by Berry Nashville, TN under the trade name BR-137P V13. Such breathable composite materials are described in more detail in PCT application WO 95 / 16746 and U.S. Patent No. 5,865,823. Other breathable substrates, including nonwoven fiber webs and open-cell shaped membranes, are described in U.S. Patent No. 5,571,096. Exemplary suitable substrates are disclosed in U.S. Patent No. 6,107,537. Other suitable materials and / or manufacturing techniques may be used to provide suitable substrates, including but not limited to surface treatments, specific membrane selection and processing, specific filament selection and processing, etc.

[0059] Absorption core

[0060] The absorbent body (38) of the present invention includes an absorbent core (62) disposed on the wearer-facing side for absorbing and containing bodily excretions. The absorbent core (62) may include an absorbent layer and a collection system. The absorbent layer is a region in which an absorbent material with high retention capacity, such as a superabsorbent polymer, is present. The absorbent core (62) may be present throughout the entire longitudinal dimension of the crotch area and extend at least partially in the front region (26); or at least partially in both the front region (26) and the rear region (28). The absorbent layer may be substantially cellulose-free. Alternatively, the absorbent layer may contain cellulose. An absorbent layer primarily containing cellulose and another absorbent layer primarily containing a superabsorbent polymer may be present.

[0061] The superabsorbent polymer of the absorbent layer can be disposed between a first material layer and a second material layer, which are fixed by a fiber layer of thermoplastic adhesive material. The first and second material layers can be nonwoven fiber webs, including synthetic fibers such as single-component fibers of PE, PET, and PP, and multi-component fibers such as side-by-side, core / skin, or island-of-the-sea fibers. Such synthetic fibers can be formed via spunbonding or meltblowing.

[0062] The absorbent core (62) may also include a collection system for facilitating the collection and distribution of bodily fluids and may be positioned between the top sheet (24) and the absorbent layers. The collection system may contain cellulose fibers. Multiple absorbent layers may be provided in the absorbent core (62). Some portions of the absorbent layers may be configured to be substantially free of absorbent material to form one or more channels. The channels may be used to allow the absorbent core (62) to bend when swollen by a fluid, so that the central area conforms to the wearer's body after swelling and prevents the product from sagging. The channels may also be formed in the collection system and may be configured to at least partially match the channels of the absorbent layers in the thickness direction. The collection system may include a liquid management layer located directly below the top sheet (24). The function of such a layer is to rapidly collect fluid from the top sheet (24) away from the wearer-facing side and / or distribute it over a larger area so that it is absorbed more effectively by the absorbent core. Such a liquid management layer may also be positioned between the bottom sheet (25) and the absorbent core. The liquid management layer may be a spunlace nonwoven fabric comprising viscose, PET, CoPET / PET fibers, and combinations thereof.

[0063] The absorbent core (62) may comprise a high-loft material containing a superabsorbent polymer. The term "high-loft" refers to a low-density, loose fabric compared to a flat, paper-like fabric. High-loft fiber webs are characterized by a relatively high porosity. This means that a relatively high amount of void space exists within which superabsorbent polymer particles can be distributed. The high-loft material of the present invention (without superabsorbent particles) can have a porosity of less than 0.20 g / cm³ at a pressure of 4.14 kPa (0.6 psi). 3 Especially at 0.05g / cm 3 Up to 0.15 g / cm 3 Density within the specified range. A high-loose layer (without superabsorbent particles) can have a density below 0.20 g / cm³ at a pressure of 2.07 kPa (0.3 psi). 3 Especially at 0.02 g / cm 3 Up to 0.15 g / cm 3 The density is within the specified range. The high-loft layer (without superabsorbent particles) of the present invention can have a density of less than 0.15 g / cm³ at a pressure of 0.83 kPa (0.12 psi). 3 Especially 0.01g / cm 3 Up to 0.15 g / cm 3 Densities within the range of 15 gsm to 500 gsm, preferably 30 gsm to 200 gsm, such as those described in US2021 / 0361497 A1. Absorbent cores (62) comprising highly bulky materials covering superabsorbent polymers may also include channels.

[0064] Alternatively, the absorbent core (62) may include an absorbent layer having a superabsorbent polymer disposed between a first nonwoven material layer and a second nonwoven material layer fixed by a fiber layer (not shown) of a thermoplastic binder material. The first and second nonwoven material layers may be relatively low basis weight nonwoven fiber webs, including synthetic fibers such as single-component fibers of PE, PET, and PP, and multi-component fibers such as side-by-side, core / skin, or island-of-the-sea fibers. Such synthetic fibers may be formed via spunbonding or meltblowing.

[0065] Composite isolation sheet

[0066] See Figures 2A to 2C The absorbent body (38) of the present invention includes a composite separator (CIS) bonded to the wearer-facing side of the top sheet (24) by a pair of longitudinally extending main adhesive portions (MB) for isolating bodily exudates, particularly urine, from the wearer's skin. The composite separator (CIS) includes a) a pair of inner loops (BLCs) having a pair of longitudinally elastic side edges, b) a front portion (FC), and c) an optional rear portion (BC). The area and region of the composite separator (CIS) are defined by the front end of the front portion, the rear end of the inner loops (BLCs) or optional rear portion (BC), and the pair of main adhesive portions (MB). The longitudinal and transverse centers of the composite separator (CIS) are open to allow bodily exudates to be contained within the absorbent core (62) through the top sheet (24). The opening of the composite spacer (CIS) is defined by the inner hoop side edge (122, 123), the front opening edge (102, 103) and the optional rear opening edge (112, 113) or the fold (93) of the rear elastic band (86), as detailed below.

[0067] exist Figures 2A to 2C In one embodiment, the front end of the front portion (FC) mates with the front end of the absorbent body (38). In a typical manufacturing process, elements of the composite spacer (CIS) are formed as continuous material bonded to the remainder of the continuous absorbent body, and then cut into individual absorbent bodies (38). The main bond (MB) can be formed by adhesives, heat, ultrasound, pressure, or a combination thereof, preferably heat and pressure. Although the substrate used to provide the composite spacer (CIS) may extend into other elements of the absorbent body (38), such other elements are not considered composite spacers (CIS). See also Figures 2A to 2B The main adhesive portion (MB) may be disposed on the wearer-facing side of the absorbent body (38), thereby allowing some of the remaining lateral dimensions of the absorbent body to extend beyond the main adhesive portion (MB). See also Figure 2CThe material used to form the composite isolation sheet (CIS) can be folded toward the lateral side edge of the absorbent body (38) facing the clothing side of the absorbent body, while the main adhesive part (MB) can be provided at the lateral side edge of the absorbent body (MB).

[0068] In addition to the longitudinally extending main adhesive portions (MB), the composite spacer (CIS) is also bonded to the wearer-facing side of the top sheet (24) by auxiliary adhesive portions (AB) extending laterally between the main adhesive portions (MB). The auxiliary adhesive portions (AB) may be provided only along the dimension between the main adhesive portions (MB), or they may be provided along the entire lateral dimension of the absorbent body (38). The auxiliary adhesive portions (AB) may also be formed by adhesive, heat, ultrasound, pressure, or a combination thereof. The auxiliary adhesive portions (AB) may be continuous along their entire dimension, or they may be provided discontinuously, such as as transversely spaced strips. The auxiliary adhesive portions (AB) may be continuous to securely prevent leakage beyond the absorbent body (38). The auxiliary adhesive portions (AB) may be discontinuous to prevent stiffness in the area. When the auxiliary adhesive portions (AB) are provided as transversely spaced strips, each interval is no greater than 10 mm. The absorbent core (62) does not extend beyond the lateral edges of the main adhesive portions (MB) and does not extend beyond the front ends of the auxiliary adhesive portions (AB). By placing the absorbent core (62) within the main adhesive portion (MB) and the auxiliary adhesive portion (AB), it helps the effluent to be effectively contained within the absorbent core (62).

[0069] See Figures 2A to 2C and Figures 4A to 4B The composite spacer (CIS) includes a pair of inner bands (BLCs) extending to the remainder of the longitudinal length of the absorbent body (38) except for the front portion (FC) or optionally the rear portion (BC), and forming a pair of side edges that are longitudinally elastic along longitudinally extending side edges (122, 123). The pair of side edges (122, 123) are elastic at least in the crotch area (30) and may lack elasticity at the front and / or rear ends adjacent to the absorbent body (38). The intersection of the front portion (FC) and the side edges (122, 123) may have active elasticity. See also Figure 2A The intersection of the optional rear portion (BC) and the side edges (122, 123) can have active elasticity. See also Figures 2A to 2C and Figures 4A to 4BThe pair of side edges (122, 123) of the inner hoop (BLC) are elasticated by longitudinally extending elastomers (35) provided adjacent to the side edges (122, 123). The elastomers used to elasticate the side edges (122, 123) can be provided in multiple elastic strands (35). The inner hoop elastic strands (35) with active elasticity can extend into the front portion (FC) and optionally the rear portion (BC). The lateral dimension (T1) of the inner hoop (BLC) between the main bonding portion and the nearest side edge (122, 123) can be from about 25 mm to about 50 mm. Such a lateral dimension can be the same for the entire composite spacer (CIS). When the inner hoop (BLC) is completely laid flat on the top sheet (24), the lateral distance (T2) between the side edges (122, 123) can be from about 50 mm to about 140 mm.

[0070] See Figures 2A to 2C and Figures 4A to 4B The composite insert (CIS) includes a front portion (FC) defined by a line extending parallel to a transverse axis that aligns with the intersection of a transverse element with an opening on the anterior side and a pair of inner loops (BLCs), a front transverse extension edge (50) of an absorbent body (38), and a main adhesive portion (MB). The front portion (FC) of the composite insert (CIS) does not cover the wearer's urethral opening when worn. The front portion (FC) has a front longitudinal endpoint (101) and a pair of front opening edges (102, 103), wherein the front opening edges (102, 103) are configured such that the front longitudinal endpoint (101) is positioned on the longitudinal axis and within the anterior region (26). The pair of front opening edges (102, 103) are within the anterior region (26) and extend from the anterior region (26) into the crotch region (30). The front opening edges (102, 103) are not elasticized. The front portion (FC) has a lateral longitudinal dimension (F1), which may be about 8% to about 50%, or about 22% to about 50%, of the longitudinal dimension (L1) of the absorbent body (38). The front portion (FC) has a central longitudinal dimension (F2) between the front longitudinal endpoint (101) and the front end of the absorbent body. Dimension F2 is about 5% to about 95%, preferably about 30% to about 85% of dimension F1. The front opening edges (102, 103) are line-symmetrical about the longitudinal axis and may be curved, straight, or formed by a series of straight lines. See also Figures 4C to 4E The front opening edge (102, 103) may include a concave portion abutting the front portion. See also Figure 4C The front opening edges (102, 103) can form part of a sine curve. See also Figure 4D The front opening edges (102, 103) together can form a circular or elliptical portion. See also Figure 4EThe front opening edges (102, 103) together can be a series of straight lines. See also Figure 4F The front opening edge (102, 103) can be a straight line.

[0071] See Figure 2A When the composite insert (CIS) includes a rear portion (BC), the rear portion (BC) is defined by a line extending parallel to a transverse axis that matches the intersection of a transverse element with an opening on the rear side and a pair of inner loops (BLCs), the rear transverse extension edge (50) of the absorbent body, and the main adhesive portion (MB). When the composite insert (CIS) includes a rear portion (BC), the composite insert (CIS) does not cover the wearer's anal opening when worn. See still Figure 2A When the composite spacer (CIS) includes a rear portion (BC), the rear portion (BC) has a rear longitudinal endpoint (111) and a pair of rear opening edges (112, 113), wherein the rear opening edges (112, 113) are configured such that the rear longitudinal endpoint (111) is positioned on the longitudinal axis and optionally within the rear region (28). The rear opening edges (112, 113) may be curved, straight, or formed by a series of straight lines. The rear opening edges (112, 113) are not elasticized. The rear portion (BC) has a lateral longitudinal dimension (B1), which may be about 5% to about 35% of the longitudinal dimension (L1) of the absorbent body. The rear portion (BC) has a central longitudinal dimension (B2) between the rear longitudinal endpoint (111) and the rear end of the absorbent body. Dimension B2 is about 5% to about 95% of dimension B1, preferably about 30% to about 85%. See also Figure 2B When the composite separator (CIS) has no rear portion (BC) or includes a rear portion (BC) that does not extend beyond the proximal edge of the fold (93), the rear side of the opening of the composite separator (CIS) is defined by the proximal edge of the fold (93) of the rear elastic band (86).

[0072] The composite separator of the present invention can have the following relationship between T1 (mm) and F1 (mm):

[0073] F1≥248.14-4.66×T1+0.34×(T1-40.79) 2

[0074] This relationship is Figure 3 The area described is above the curvature. Unbound by theory, by providing T1 and F1 with the above relationship, while also providing F2 which is about 30% to about 85% of F1, good urine retention is provided without irritating the wearer's genital area.

[0075] The materials used to prepare composite separators (CIS) can be substantially water-impermeable. These materials can be SMS nonwovens or SMMS nonwovens, or nonwovens comprising layers of fine denier fibers with an average diameter of less than 1 micrometer. A useful combination of nonwoven fiber webs can include spunbond, meltblown, spunbond (“SMS”) fiber webs comprising an outer layer of spunbond thermoplastic (e.g., polyolefin) and an inner layer of meltblown thermoplastic. Suitable composite separator materials for use herein include those of the SMS type, available under the trade name LIVSEN SMS13 from Toray Polytech Nantong China, SM15009270 from FQN Hazlet NJ, and B10160HS from Fibertex Aalborg Denmark. Materials can be treated regionally or partially with detergents or hydrophobic surface coatings to provide a variety of physical properties. Materials used to prepare composite separators (CIS) may have a hydrostatic head greater than about 2 mbar, or greater than about 3 mbar, or greater than about 4 mbar. Materials may have a hydrostatic head less than about 200 mbar, or less than about 100 mbar, or less than about 75 mbar, or less than about 50 mbar, or less than about 25 mbar, or less than about 15 mbar. Materials may have an opacity of about 15% to about 50% Hunter opacity, or about 20% to about 45% Hunter opacity. Materials may have an opacity of about 45% to about 75% Hunter opacity; or about 50% to about 70% Hunter opacity. Materials may have an opacity less than about 50 mbar. 3 / m 2 / min; or less than approximately 45m 3 / m 2 The material has an air permeability of approximately 5 m / min. 3 / m 2 / min; or greater than approximately 10m 3 / m 2 / min; or greater than approximately 15m 3 / m 2 / min; or greater than approximately 20m 3 / m 2 / min air permeability.

[0076] See Figures 5A to 5D Various configurations for forming composite spacers (CIS) have been disclosed. Figures 5A to 5D It is along Figure 4A A schematic cross-sectional view of line BB, in which the substrate used to manufacture the composite spacer (CIS) extends laterally and is separated from the rest of the absorbent body (38).

[0077] Figures 5A to 5B This relates to a configuration in which the inner hoop (BLC) is formed by a portion different from the front portion (FC). The material forming the inner hoop (BLC) may be the same as or different from the material forming the front portion (FC). In these configurations, the inner hoop (BLC) is formed by an inner hoop portion (31) extending the entire length of the absorbent body (38). When such a configuration of the inner hoop (BLC) is adopted, at least the central region (30) has active elasticity. When such a configuration of the inner hoop (BLC) is adopted, the inner hoop portion (31) overlapping the front portion (FC), particularly along the front end (50) of the absorbent body (38), may lack active elasticity. See still Figures 5A to 5B The front portion (FC) is formed by a front portion bonded to the wearer-facing side of the inner hoop portion (31). See also Figure 5A The front portion can be set in one layer and extends the entire lateral dimension between the main adhesive portions (MBs). See also Figure 5B The front section can be arranged in two layers, each providing a different function. For example, the layer facing the wearer can be made of a material with a soft touch to the skin, while the other layer can be made of a material with a low hydrostatic head. Figure 5B As shown, the lateral dimension of the front portion (FC) can be smaller than the lateral dimension of the inner hoop (BLC).

[0078] Figures 5C to 5D This relates to configurations where the inner hoop (BLC) and the front portion (FC) are formed from the same integral part. In these configurations, the elasticity of the side edges of the inner hoop (BLC) can also be provided by the outer front portion piece (FC1) and the inner front portion piece (FC2). See also Figure 5C The front section can be located on one floor. See also Figure 5D The front part can be set in the second layer.

[0079] for Figures 5A to 5D In any configuration, the optional rear portion (BC) may be formed in the same manner as the front portion (FC) as described above.

[0080] In such Figure 2BIn some configurations, the rear portion (BC) can be provided in a size relatively smaller than the front portion (FC) and relatively smaller than the waist guard portion (WGP), which will be discussed in further detail below. Even a small rear portion (BC) is advantageous for process feasibility. The front portion (FC) and the rear portion (BC) can be formed from a continuous material before assembly with the rest of the absorbent body (38), wherein the front opening edge and the rear opening edge (102, 103, 112, 113) are formed together by a die-cutting machine. The die-cut continuous material can then be bonded to the continuous absorbent body at a location bridging the front and rear ends of the continuous absorbent body, and then finally cut into individual absorbent bodies. By providing the die-cut to the rear portion (BC) together with the front portion (FC), the pressure provided by the die-cutting machine can be distributed across the continuous material.

[0081] Front section and front elastic band

[0082] In the absorbent article of the present invention, the components of the front portion (FC) and the front elastic band (84) have a specific relationship in order for the front portion (FC) to perform its intended function. See also Figure 4AThe front elastic band (84) includes a transfer elastic strand (97), which is at least one elastic strand superimposed on the front portion (FC) and a pair of main adhesive portions (MB). The transfer elastic strand (97) may be an elastically active elastic strand spanning the entire lateral dimension of the front elastic band, or an elastically cut window with an elastic cut window at the lateral center. The elastic cut window may be adjusted so that the transfer elastic strand (97) does not superimpose on the inner hoop elastic strand in the front portion. Regardless of the superposition dimension with the front portion (FC), the transfer elastic strand (97) superimposes on the pair of main adhesive portions (MB) to transfer the contractile force to the absorbent body (38) between the front elastic band (84) and the front portion (FC). The transfer elastic strands (97) may be one elastic strand, two elastic strands, about two to about 15 elastic strands, or about three to about 12 elastic strands, and may have a density of about 200 dtex to about 1100 dtex, or about 300 dtex to about 1000 dtex, and be provided with an elongation of about 100% to about 400%, or about 150% to about 300%. The absorbent body (38) attached to the front elastic band (84) maintains the tension provided by the combination of transfer elastic strands (97) on the garment-facing side (when it contracts during wear and is therefore pulled away from the wearer), while the tension provided by the inner elastic strands (35) is transferred to the front portion (FC) to raise the front portion (FC) from the top plate (24) and against the wearer. The dimensions of the composite insert (CIS) and the tension provided by the inner elastic strand (35) and the transfer elastic strand (97) are adjusted so that, when worn, the front portion (FC) that rises from the top piece (24) does not cover the wearer's urethral opening. The composite insert (CIS) of the present invention lacks elasticity along a pair of front opening edges (102, 103). Even though some portions around the openings of the composite insert (CIS) lack elasticity, sufficient tension is provided by the combination of the inner elastic strand (35) and the transfer elastic strand (97) to provide a gap space between the front portion (FC) and the remainder of the absorbent body (38). The lack of elasticity at the front opening edges (102, 103) prevents irritation to the wearer's genital area.

[0083] Furthermore, the configuration in which the front portion (FC) has no elastic strands in the front opening edges (102, 103), and preferably no elastic strands at all, provides elasticity substantially parallel to the longitudinal axis (LX) of the absorbent body. An advantage of this configuration of the composite spacer (CIS) of the present invention is that any elastomer to be disposed on the composite spacer (CIS) can also be advanced in the machine direction for attachment when the machine direction for manufacturing the absorbent body is aligned with the longitudinal direction.

[0084] See Figure 4A and Figures 6A to 6B The front elastic band (84) may include a folded portion (93), which is an extension of the outer sheet (92) or inner sheet (94) folded over the waist opening, wherein the folded portion may be bonded to the absorbent body (38) or to the front portion (FC) by a folded adhesive portion (93B). The folded adhesive portion (93B) may extend laterally at least between the side edges of the inner band. The folded adhesive portion (93B) may extend the entire lateral dimension of the front elastic band (84). The folded adhesive portion (93B) and the auxiliary adhesive portion (AB) may overlap each other in the thickness direction. By overlapping the folded adhesive portion (93B) and the auxiliary adhesive portion (AB), a barrier is formed to prevent outflow from entering beyond the front opening of the absorbent body (38).

[0085] See Figure 4A The anterior elastic band (84) may be divided into multiple zones that span laterally and are defined by the percentage of their position from the distal edge (88) to the proximal edge (90) relative to the seam length LS, wherein the distal edge (88) is considered to be 0% and the proximal edge (90) is considered to be 100%. The anterior elastic band may include a waist zone (202) located at 0% to 25% of the side seam length LS, a distal belly zone (204) located at 25% to 50%, a proximal belly zone (206) located at 50% to 85%, and a leg zone (208) located at 85% to 100%, wherein the proximal belly zone has a tensile stress at least 50% higher than any other zone. The anterior longitudinal endpoint (101) or anterior portion (FC) may overlap with the proximal belly zone. By superimposing the front longitudinal end point (101) with the proximal belly area, which has relatively high tensile stress, this helps to pull the proximal belly area away from the wearer to provide a gap space between the front portion (FC) and the rest of the front elastic band (84).

[0086] The elastic zone of the front part and the foreleg

[0087] See Figure 2C The absorbent article (20) of the present invention can be a one-piece trouser, which includes an elastic cover (40) forming the entire article facing the garment surface, the elastic cover having a front area (26) and a rear area (28) extending laterally between side seams (32), and a crotch area (30) longitudinally positioned between the front and rear areas (26, 28). The front and rear areas of the elastic cover (40) are considered to be a front elastic band (84) and a rear elastic band (86). For one-piece trousers, laterally extending elastic members (96) may be provided in the front and rear elastic bands (84, 86) and in the crotch area (30) near the rear area (28). By having such additional laterally extending elastic members (96) near the rear area (28), this helps the elastic cover (40) conform to the wearer's buttocks.

[0088] See Figure 2C and Figure 4B In addition to the elastic members (96) extending laterally in the front and rear elastic bands (84, 86), there may also be elastic members extending from the front elastic band (84) into the crotch area (30). Elastomers that typically extend along the leg opening into the crotch area (30) are defined herein as leg elastomers (33). Multiple leg elastomers (33F, 33B) may extend from the proximal edges of the front and rear band areas (84, 86) into the crotch area (30) to impart elasticity along the leg opening (LO). The leg elastomers may include multiple front leg elastomers (33F) and multiple rear leg elastomers (33B), the multiple front leg elastomers being engaged between the outer piece (92) and the inner piece (94) and extending from the left front area through the crotch area (30) to the right front area, and the multiple rear leg elastomers being engaged between the outer piece (92) and the inner piece (94) and extending from the left rear area through the crotch area (30) to the right rear area.

[0089] See Figure 2C and Figure 4B The leg elastomer may include a plurality of foreleg elastomers (33F) engaged between the outer sheet (92) and the inner sheet (94) and extending from the left front region along the leg opening, and laterally extending through the crotch region (30) to the right front region at approximately the longitudinal center of the article. There may be two to five foreleg elastomers (33F) disposed on the elastic cover (40). Each foreleg elastomer (33F) may be provided with a density of about 300 dtex to about 1000 dtex and an elongation of about 120% to about 400%. The foreleg elastomers (33F) may all be provided with the same density and elongation, or have a density and / or elongation increasing toward the inwardly disposed elastomer. The foreleg elastomers (33F) can be incorporated into the elastic cover (40) such that the foreleg elastomers (33F) are spaced apart from each other at least about 3 mm in any area where the foreleg elastomers (33F) are provided.

[0090] See Figure 4B The area that matches the position of the foreleg elastomer at the side seam and spans laterally is considered the foreleg elastic zone (109). The front longitudinal endpoint (101) may overlap with the foreleg elastic zone (109). By overlapping the front longitudinal endpoint (101) with the foreleg elastic zone (109) which has relatively high tensile stress, this helps to pull the garment-facing side of the absorbent body (38) away from the wearer to provide a gap space between the front portion (FC) and the rest of the absorbent body (38).

[0091] Lower back protection

[0092] See Figure 2B The absorbent article of the present invention may further include a back waist guard (WGP) on the rear elastic band (86). Similar to the front elastic band (84), the rear elastic band (86) may also be divided into multiple zones that span laterally and are defined by a percentage of their position from the distal edge (88) to the proximal edge (90) relative to the seam length LS, wherein the distal edge (88) is considered 0% and the proximal edge (90) is considered 100%. Figure 2B In one embodiment, the rear elastic band (86) has a larger longitudinal dimension than the front elastic band (84), so the front and rear elastic bands are sewn together with their distal edges (88) aligned, wherein the proximal portion of the rear elastic band (86) may remain unsewn to form a hip cover. Therefore, the seam length LS has a shorter longitudinal dimension than the rear elastic band (86). A back lumbar support (WGP) may be positioned in an area located at approximately 5% to approximately 50% of or approximately 10% to approximately 50% of the LS, wherein the back lumbar support (WGP) is formed from at least one piece (e.g., an outer folded portion (93)) of the pieces forming the rear elastic band (86).

[0093] The back lumbar support (WGP) is a separate component from the composite interlayer (CIS), yet it can cooperate with the rear section (BC) to provide additional protection on the rear side. Unbound by theory, by providing a back lumbar support (WGP) of this size relative to the LS on the rear elastic band (86), the rear side effectively covers the waist opening, allowing fluid outflows (such as urine, thin excrement, or blood) to be effectively drawn into the pocket, even when the wearer is actively moving.

[0094] See Figures 7A to 7C The back waist guard (WGP) can be made from an extension of an outer panel (92) that folds inward twice to surround a first elastic member (96F) and further provides the back waist guard (WGP) in the intended position relative to the side seam length LS. Due to the double folding, the first elastic member (96F) is sandwiched between a first outer panel fold (931) and a second outer panel fold (932), wherein the first outer panel fold (931) forms the garment-facing side of the back waist guard (WGP), and the second outer panel fold (932) forms the wearer-facing surface. See also Figures 7B to 7CA certain longitudinal dimension from the distal edge of the second inner fold (932) is bonded to the remainder of the belt; however, such bonding, as shown for the SWFA, leaves some unbonded longitudinal dimensions. The location at the farthest end of the unbonded area is the closed baseline (203B), and the common proximal edge of the first outer fold (931) and the second outer fold (932) is the open edge (203M). The back waist guard (WGP) is defined as having a longitudinal dimension spanning the closed baseline (203B) and the open edge (203M), and a lateral dimension matching the width of the provided belt. The left and right lateral edges of the back waist guard (WGP) are also bonded to the remainder of the belt; such bonding is shown for the SWFA. The unbonded area thus provided is the pocket (203P). The bonded portion defining the area of ​​the pocket (203P) is therefore configured to provide a pocket (203P) with an overlay film (25) (optionally fully overlay film (25)). Other elastomers (96S) may be introduced between the inner sheet (94) and the outer sheet (92).

[0095] See Figures 7A to 7B The first elastic member (96F) provides a waist protection elastic portion (WGEP), which may be made elastic by one or more elastic strands, elastic ribbon, mechanically activated nonwoven fabric, or otherwise. The waist protection elastic portion (WGEP) is defined as having a longitudinal dimension (2031) extending from the open edge (203M) of the first elastic member (96F) to the distal edge. When the first elastic member (96F) is multiple elastic strands, the distal edge of the waist protection elastic portion (WGEP) is where the elastic strands are positioned to the farthest point. Two to ten elastic strands, or two to five elastic strands, or two to eight elastic strands, or three to four elastic strands, or three to eight elastic strands, or four to six elastic strands may be present on the waist protection elastic portion. The longitudinal dimension of the waist protection elastic portion (WGEP) is smaller than the longitudinal dimension of the back waist protection (WGP), allowing for the provision of a pocket (203P) with accommodating capacity. The longitudinal dimension of the elastic waist protection portion (WGEP) may be no greater than about 40 mm, or no greater than about 35 mm, or no greater than about 30 mm, or no greater than about 25 mm, or 15 mm to about 40 mm, or about 10 mm to about 35 mm, or about 10 mm to about 25 mm.

[0096] See Figures 7A to 7CThe remaining portion of the strap overlapping the elastic waist protector (WGEP) is defined as the related portion CP. That is, the related portion CP has the same longitudinal dimension as the elastic waist protector (WGEP) (2031). The related portion CP may be elastic or non-elastic, wherein the tensile stress of the elastic waist protector (WGEP) is higher than that of the related portion CP. The related portion CP may be elastic, wherein the tensile stress of the elastic waist protector (WGEP) is at least about 25% higher, or at least about 100% higher, than that of the related portion CP. Without being bound by theory, this difference in tensile stress allows the elastic waist protector (WGEP) to make close contact with the wearer while simultaneously pulling open the opening edge (203M) from the related portion CP, thereby opening the pocket (203P) towards the proximal side. Therefore, the pocket (203P) is constructed to have good capacity. The related portion CP may have elastic cut windows, such that some portions are elastic while the lateral center does not interfere with the opening of the pocket (203P). When the lumbar support elastic portion (WGEP) is made elastic by setting multiple elastic strands (96F), each elastic strand is positioned at a distance of not less than 2mm to 5mm from the opening edge (203M). This avoids placing the elastic strand at the extreme edge of the opening edge (203M) to prevent irritation to the wearer from the back lumbar support (WGP). The lumbar support elastic portion (WGEP) can be set with relatively small spacing between the multiple elastic strands (96F). The elastic strands (96F) of the lumbar support elastic portion (WGEP) can be set at a spacing of no more than about 12mm, or no more than about 10mm, or no more than about 6mm, or about 2mm to about 8mm, or about 3mm to about 9mm, or about 2mm to about 6mm.

[0097] See Figure 2B The front region includes a front portion (FC) and the rear region includes a back waist guard (WGP). Different types of protective layers on the front and rear portions provide effective protection and containment for different types of body effluents. Furthermore, because the front portion (FC) does not extend beyond the absorbent body (38), its presence does not add additional substrate to the side seams (32) in the front region. Therefore, while the presence of the back waist guard (WGP) increases the number of substrates at the side seams (32) in the rear region, the number of layers in any part of the side seams (32) combined with those from the front and rear elastic bands (84, 86) comprises no more than seven layers of substrate. It is advantageous to keep the number of layers at the side seams (32) low, considering the need to provide side seams with uniform strength along their longitudinal length, which provides sufficient strength when the garment is worn while allowing for easy opening upon removal.

[0098] Inner and outer films

[0099] The front elastic band (84) and the rear elastic band (86) of the present invention can each be formed from an inner sheet (94) and an outer sheet (92) that have a specific relationship with each other, so as to enhance the specific beneficial effects of the front elastic band (84) and the rear elastic band (86).

[0100] When the inner sheet (94) is hydrophilic and the outer sheet (92) is hydrophilic, the hydrophilicity of the outer sheet can be greater than that of the inner sheet. Without being bound by theory, it is believed that such a hydrophilicity gradient is advantageous for transferring skin sweat from the inner sheet (94) to the outer sheet (92) and the exterior of the laminate. The inner sheet (94) nonwoven fabric can be inherently hydrophobic. Hydrophobicity can be provided to the inner sheet (94) nonwoven fabric by treating it with a hydrophobic melt additive during fiber preparation, or by applying a hydrophobic additive after the formation of the nonwoven fabric. The outer sheet (92) nonwoven fabric can be inherently hydrophobic and therefore provides relatively higher hydrophilicity than the inner sheet (94) treated with a hydrophilic melt additive during fiber preparation, or by applying a hydrophilic additive after the formation of the nonwoven fabric.

[0101] The basis weights of the outer sheet (92) and the inner sheet (94) can be adjusted so that the basis weight of the inner sheet (94) is no greater than that of the outer sheet (92). Therefore, the outer sheet (92) can have a soft, fluffy feel that signifies high quality, while the inner sheet (94) can remain thinner and conform to the outer sheet (92), thus saving costs. Furthermore, without being bound by theory, by providing such a basis weight relationship, it is believed that skin sweat is effectively transferred to the exterior of the outer sheet (92) and the laminate, while preventing the transferred sweat from returning to the inner sheet (94).

[0102] Other components

[0103] The absorbent article (20) of the present invention may also include components that improve the leak-proofness, abrasion resistance, fit or aesthetics of the resulting absorbent article.

[0104] The absorbent body (38) may include bushing leg clamps (34). See also Figures 2A to 2B The liner leg cuff (34) may be positioned laterally outward relative to the composite isolation panel (CIS). The liner leg cuff (34) provides a seal around the wearer's thigh. Typically, each liner leg cuff (34) will include an elastic element, such as one or more elastic strands (33), which are included in an absorbent body (38), for example, between a nonwoven material and a backing sheet (25) in the leg opening area. The substrate used to prepare the composite isolation panel (CIS) may extend laterally and be used to form the liner leg cuff (34).

[0105] Although not shown, the absorbent body (38) of the present invention may include an outer cover located on the clothing-facing side of the backing (25). See also Figure 1 and Figures 2A to 2B The outer cover provides a finished look to the garment-facing surface of the trousers. The outer cover may be made of a soft, nonwoven material. The outer cover and the underlayer (25) may be bonded together by adhesive or any other suitable material or method. A particularly suitable outer cover may be available under trade name A10160EJ-MALAYSIA from Fibertex NiLai Malaysia and under trade name SM1104174 from FQN Hazlet NJ.

[0106] The absorbent core (62) may include an intermediate layer between the absorbent material layer and the backing sheet (25). The intermediate layer may be in direct contact with both the absorbent material layer and the backing sheet (25). The intermediate layer may serve as a masking layer to isolate the superabsorbent polymer particles in the absorbent material layer from the backing sheet (25), thereby reducing the graininess and improving the tactile properties of the garment-facing side of the article, especially for absorbent cores (62) containing a high content of superabsorbent polymer particles. The intermediate layer may also isolate exudates already absorbed in the absorbent material layer from the garment-facing side of the article, as this may be visually unpleasant for caregivers. Thus, with an intermediate layer having relatively high opacity, stains (e.g., from urine or feces) in the absorbent material layer can be concealed from view when the backing sheet (25) of the absorbent article is viewed during use. The Hunter opacity of the intermediate layer in a dry state may be at least 25%, or at least 40%, or at least 50%, or at least 70%. The interlayer can also help reduce the contact of residual moisture with the film (25), which can cause the caregiver to feel cold / wet, or cause the wearer to mistake the feeling of cold / wet for leakage from the absorbent material. The interlayer can also serve as a temporary reservoir for liquids that are not absorbed quickly enough by the absorbent material layer.

[0107] The absorbent article (20) of the present invention provides parts with a specially arranged aesthetic that enhances the presence and beneficial effects of the composite insert (CIS). The top piece (24) may have a first morphology visible from the wearer-facing side, and the composite insert (CIS) may have a second morphology visible from the wearer-facing side, wherein the first and second morphologies are mutually distinguishable. The second morphology may be provided on the front portion (FC) and / or the inner band (BLC). The first and second morphologies may be selected from a group of colors, openings, patterns, and combinations thereof. The opening may be a hole or a slit. The pattern may be embossed, quilted, or other visible variations.

[0108] Force measurement of the whole product

[0109] Force was measured using an electronic tension tester or equivalent instrument with a computer interface, such as the MTS Criterion C42, running TestWorks 4 software (purchased from MTS SYSTEMS (CHINA) CO., LTD). A load cell was selected such that the force result of the tested sample would fall between 10% and 90% of the load cell's capacity. The instrument was calibrated according to the manufacturer's instructions. All tests were conducted indoors at 23°C ± 2°C and 50% ± 5% relative humidity.

[0110] The tension tester is equipped with a hanging-type sample holder (300), such as... Figure 8 As shown. Each fixture includes a rigid, linear, rubber-coated horizontal bar segment (302) to prevent sample slippage during testing. The outer diameter of the horizontal bar segment (including the rubber coating) is 10.0 mm. The central axis of the horizontal bar segment (302) is configured to remain parallel and in the same vertical plane throughout the testing process. The gauge length perimeter is determined by the following formula:

[0111] Gauge length perimeter = 2 × (H + D + πD / 2)

[0112] Where H is the vertical gap between the horizontal bar segments (302), and D is the outer diameter of the bar.

[0113] The instrument is set up by following these steps:

[0114] Chuck speed 254.0 mm / min Final load point 19.61N Duration 0 Cycle number 1 Data acquisition rate 50Hz

[0115] Insert the sample (20) onto the upper horizontal bar segment (302) so that the bar passes through the waist opening and one leg opening of the sample. Raise the chuck until the sample is suspended above the lower bar and does not contact the lower bar (302). Adjust the load sensor and lower the chuck so that the lower bar (302) is inserted through the waist opening and the other leg opening, but without stretching the sample. Adjust the sample so that the longitudinal centerline LX of the sample is in the horizontal plane between the upper and lower bars (302). The center of the side in contact with the bar (302) is located on the same vertical axis as the instrument load sensor. Raise the chuck slowly while holding the sample in place by hand as needed until the force is between 0.05N and 0.1N, being careful not to add any unnecessary force. The gauge length circumference at this point is the initial gauge length circumference. Start the test and move the chuck upward at 254mm / min until a force of 19.6N is obtained, then the chuck immediately returns to the initial gauge length circumference at the same speed. Record the maximum circumference at 19.6 N and the force at 70% of the maximum circumference during the loading and unloading phases of the test.

[0116] The maximum circumference at 19.6 N is defined as the full tensile circumference (mm). Full tensile circumference (mm) × 0.7 is defined as the 70% tensile circumference. Waist force is defined as the force at 70% tensile circumference during the load (tensile) segment of the test. Five samples are analyzed, and their average values ​​are calculated and reported separately, accurate to 0.01 N.

[0117] Belt tensile stress measurement

[0118] Tensile stress (N / m) is calculated by dividing the tension (N) by the specimen width (m). Force can be measured using an electronic tension tester or equivalent instrument with a computer interface, such as the MTS Criterion C42, running TestWorks 4 software (purchased from MTS SYSTEMS (CHINA) CO.,LTD). Select a load cell such that the force result of the tested sample will be between 10% and 90% of the load cell's capacity. Calibrate the instrument according to the manufacturer's instructions. All tests are conducted indoors at 23°C ± 2°C and 50% ± 5% relative humidity. The instrument is equipped with a single-line contact clamp at least as wide as the specimen.

[0119] To obtain the sample, the sample article is cut along the side seam (32) and removed from the absorbent body by detaching the elastic cover (40) or the front and rear sections (26, 28) from the absorbent body (38), and further by separating the waist guard section (WGP) from its attached tape. Cold spraying can be used, taking care not to cause wrinkling in the tape segments. Care should be taken not to spray onto any elastic members (96F, 96S). According to the invention, the obtained elastic tape sample is cut into sections (202, 204, 206, 208, 2031-WGEP, 2031-CP), taking care not to cut any elastic members (96F, 96S). Before testing, the sample is pre-conditioned for two hours at 23°C ± 2°C and 50% ± 5% relative humidity.

[0120] The instrument is set up according to the following steps. The initial gauge length is calculated from the initial gauge length perimeter measured during the full-product force test using individual identical products as described above. Initial gauge length = 0.5 × initial gauge length perimeter. The final gauge length is calculated from the full tensile perimeter measured during the full-product force test as described above.

[0121] Chuck speed 254.0 mm / min Data acquisition rate 50Hz Final gauge length 0.5 × full stretch circumference Duration 0 Cycle number 1

[0122] Clamp one end of the specimen into the upper clamp and apply a balanced load. Clamp the other end of the specimen into the lower clamp. Approximately 5 mm of each end of the specimen lies behind the contact line of the clamps. Begin the test and extend the specimen to the final gauge length at a clamping speed of 254 mm / min, then immediately return it to the initial gauge length at the same speed. During the test, the specimen extends transversely to the workpiece. Record the unloading force at 70% of the final gauge length during the unloading phase of the test.

[0123] For each zone, five specimens were analyzed and the unloading forces were recorded. The average tensile force (N) was calculated for each closest to 0.01 N. The tensile stress in each zone was calculated and reported by dividing the average tension (N) by the average specimen width (m), accurate to 0.1 N / m.

[0124] Opacity method

[0125] Opacity was measured using an instrument or equivalent: a spectrophotometer with a circular optical geometry and a computer interface, featuring 0° illumination / 45° detection, such as the HunterLabLabScan XE running Universal Software (purchased from Hunter Associates Laboratory Inc., Reston, VA). Instrument calibration and measurements were performed using standard white and black calibration plates provided by the supplier. All tests were conducted indoors at 23°C ± 2°C and 50% ± 2% relative humidity.

[0126] The spectrophotometer was configured for the XYZ color scale, D65 illuminator, and 10° standard observation, with the UV filter set to nominal. The instrument was normalized to a 0.7-inch aperture and a 0.5-inch field of view according to the manufacturer's specifications. After calibration, the software was set to the Y-opaqueness specification, which instructs the operator to cover the sample with a white or black calibration ceramic disc during measurements.

[0127] Before testing, pre-condition the article at 23°C ± 2°C and 50% ± 2% relative humidity for two hours. To obtain the sample, stretch the article flat on a workbench with the body-facing surface upwards and measure the total longitudinal length of the article. Select the test site at the midpoint of the longitudinal direction of the article or section. Using scissors, cut the sample into a 60mm square or as close to 60mm as possible. Remove any elastic components.

[0128] Place the specimen over the measuring port. The specimen should completely cover the port with a surface that corresponds to the wearer-facing surface of the specimen pointing towards the port. Gently extend the specimen until it is taut in its longitudinal direction, so that the specimen lies flat against the port plate. Apply adhesive tape to secure the specimen to the port plate in its extended state for testing. The tape should not cover any part of the measuring port. Then cover the specimen with a white standard plate. Take a reading, then remove the white ceramic plate and replace it with a black standard ceramic plate without moving the specimen. Take a second reading and calculate the opacity as follows:

[0129] Opacity = (Y value (black backing) / Y value (white backing)) × 100

[0130] Samples from five identical articles were analyzed, and their opacity results were recorded. The average opacity was calculated and reported to an accuracy of 0.01%.

[0131] air permeability test

[0132] Breathability was tested using a TexTest FX3300 breathability tester (purchased from Advanced Testing Instruments, Greer, SC) or an equivalent instrument, which has a custom 1cm gauge. 2 The instrument was fitted with a circular aperture (also purchased from Advanced Testing Instruments). It was calibrated according to the manufacturer's specifications. All tests were conducted in a chamber maintained at 23°C ± 2°C and 50% ± 2% relative humidity.

[0133] Before testing, pre-condition the product at 23°C ± 2°C and 50% ± 2% relative humidity for two hours. To obtain the sample, stretch the product flat on a workbench with the body-facing surface upwards and measure the total longitudinal length of the product. Select the test site at the midpoint of the longitudinal direction of the product or section. Using scissors, cut the sample into a 30mm square or as close to 30mm as possible. Remove any elastic components.

[0134] Position the center of the specimen above the measuring port. The specimen should completely cover the port with a surface that corresponds to the wearer-facing surface of the specimen pointing towards the port. Gently extend the specimen longitudinally until taut, so that the specimen lies flat across the port. Apply adhesive tape to secure the specimen across the port in its extended state for testing. The tape should not cover any part of the measuring port. Set the test pressure to allow air to pass through the specimen. For nonwoven specimens, set the pressure to 125 Pa; and for specimens containing a membrane, use 2125 Pa. Close the sample loop and adjust the measuring range until the range indicator shows green to indicate that the measurement result is within the instrument's permissible limits. Record the air permeability to an accuracy of 0.1 m³ / m² / min.

[0135] Hydrostatic head test

[0136] Hydrostatic head testing was performed using a TexTest FX3000 hydrostatic head tester (purchased from Advanced Testing Instruments, Greer, SC), which features a custom-designed 1.5 cm² circular measuring port (also purchased from Advanced Testing Instruments). Two annular sleeve rings (the same size as the gasket surrounding the measuring port) were cut from a standard protective sleeve (part FX3000-NWH, purchased from Advanced Testing Instruments) for fine nonwovens. The sleeve rings were then attached to the specimen-facing surfaces of the upper and lower gaskets of the TexTest instrument using double-sided adhesive tape to protect the specimen during clamping. The instrument was standardized according to the manufacturer's specifications. All tests were conducted in a chamber maintained at approximately 23°C ± 2°C and approximately 50% ± 2% relative humidity.

[0137] Before testing, pre-condition the article at approximately 23°C ± 2°C and approximately 50% ± 2% relative humidity for two hours. To obtain the sample, stretch the article flat on a workbench with the body-facing surface upwards and measure the total longitudinal length of the article. Select the test site at the midpoint of the longitudinal direction of the article or section. Using scissors, cut the sample into a 70mm square or as close to 70mm as possible. Remove any elastic components.

[0138] Place the specimen centered above the orifice of the upper test indenter. The specimen should completely cover the orifice with a surface that corresponds to the surface of the specimen facing the clothing (the wearer's surface and then the water) pointing towards the orifice. Gently stretch the specimen longitudinally so that it lies flat against the upper test plate. Apply adhesive tape to secure the specimen to the test plate in its stretched state for testing. The tape should not cover any part of the measuring orifice.

[0139] Fill the TexTest syringe with distilled water and add water through the measuring port of the lower test plate. The water level should fill to the top of the lower liner. Attach the upper test head to the instrument and lower the test head to create a seal around the specimen. For specimens with a hydrostatic head of 50 mbar or less, set the test rate to 3 mbar / min, and for specimens with a hydrostatic head greater than 50 mbar, set the rate to 60 mbar / min. Begin the test and observe the specimen surface to detect water droplets penetrating the surface. Terminate the test when a water droplet is detected on the specimen surface or the pressure exceeds 200 mbar. Record the pressure to the nearest 0.5 mbar; or if no penetration is detected, record >200 mbar.

[0140] Five identical products were analyzed, and their hydrostatic head results were recorded. The average hydrostatic head was calculated and reported to an accuracy of 0.1 mbar.

[0141] Example

[0142] Therefore, Example 1 and Comparative Examples 1 to 2 were obtained.

[0143] Comparative Example 1: "Pampers Ichiban Pants Size 5" diapers purchased from the PRC market in 2022, batch number #20221104.

[0144] Comparative Example 2: "GooN Premium NaturePants" supplied by Daio Paper, purchased from the PRC market in 2022, lot number #20220828.

[0145] Example 1: Pampers Ichiban Pants Size 5 diapers, batch number #20230317, purchased from the PRC market in 2023, were further modified to replace the composite separator, giving them the following characteristics. Figure 4A It has a front section (FC) and inner hoop (BLC) configuration, but no rear section (the inner hoop extends to the rear end of the absorbent body), and the dimensions are shown in Table 1 below.

[0146] In addition, consumer acceptance tests were conducted on Example 1 and Comparative Examples 1 to 2 as detailed below, and leakage prevention is also reported in Table 1 below.

[0147] Consumer acceptance test

[0148] Example 1, Comparative Example 1, and Comparative Example 2 were placed in a consumer test among 29 caregivers of infants wearing size 5 pants diapers. The expert panel members were caregivers of Chinese size 5 (XL) wearers (all boys) aged 0 to 36 months, who experienced at least 3 or more instances of urine leakage while the infants were sleeping. The expert panel members were given sufficient samples of Example 1, Comparative Example 1, and Comparative Example 2 for use for 5 days each. The 29 expert panel members were divided into 6 groups, each using the example rotation schedule in Table 1.

[0149] Table 1

[0150] Special task force members 1-5 6-10 11-15 16-20 21-25 26-29 Product 1 Comparative Example 1 Comparative Example 1 Example 1 Example 1 Comparative Example 2 Comparative Example 2 Product 2 Example 1 Comparative Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 1 Example 1 Product 3 Comparative Example 2 Example 1 Comparative Example 2 Comparative Example 1 Example 1 Comparative Example 1

[0151] During the 15-day usage period, each member of the expert panel filled out a log page, inquiring about urine leakage for each sample they used. The urine leakage % for each test sample was calculated by dividing the number of leaking samples by the total number of samples used by all expert panel members. Due to natural variations in consumer usage habits, the total number of samples used varied from example to example. As a result, the urine leakage % for each example is summarized in Table 2.

[0152] Table 2

[0153] size Example 1 Comparative Example 1 Comparative Example 2 F1 (mm) 114 0 0 F2 (mm) 64 0 0 T1(mm) 40 34 40 Total use of pads 487 549 551 Total leakage pad 22 82 81 leakage(%) 4.5*) 14.9 14.7

[0154] *) Statistically significantly superior to Comparative Example 1 and Comparative Example 2 at a 95% confidence level.

[0155] When worn, the article of Example 1 provides a composite barrier that rises from the top sheet without covering the intended wearer's urethral opening. The article of Example 1 provides good protection against urine from the wearer's skin while maintaining the containment performance and wearing comfort of Comparative Example 1. The article of Example 1 can be manufactured at approximately the same speed as Comparative Example 1.

[0156] The dimensions and values ​​disclosed herein should not be construed as strictly limited to the precise numerical values ​​cited. Rather, unless otherwise specified, each such dimension is intended to represent the stated value and a range around which it is functionally equivalent. For example, a dimension disclosed as “40 mm” is intended to represent “approximately 40 mm”.

[0157] Unless expressly excluded or otherwise limited, every reference cited herein, including any cross-references or related patents or patent applications, and any patent application or patent claiming priority to or benefiting from it, is incorporated herein by reference in its entirety. Reference to any reference is not an endorsement of it as prior art to any disclosed or protected art herein, nor is it an endorsement of any such invention, either on its own or in combination with any one or more references. Furthermore, where any meaning or definition of a term in this invention conflicts with any meaning or definition of the same term in referenced documents, the meaning or definition given to that term in this invention shall prevail.

[0158] While specific embodiments of the invention have been illustrated and described by way of example, it will be apparent to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. Therefore, it is intended that all such changes and modifications falling within the scope of the invention be covered by the appended claims.

Claims

1. An absorbent article having a longitudinal direction and a transverse direction, said absorbent article comprising a front elastic belt, a back elastic belt and a crotch region, wherein said front elastic belt and said back elastic belt are connected with a pair of side seams to form a waist opening and a pair of leg openings; said crotch region extends longitudinally between said front elastic belt and said back elastic belt; for belt-type pants, the front elastic belt is a front region and the back elastic belt is a back region; and for unitary pants, the portions extending transversely between the side seams are considered to be front and back regions, respectively; said absorbent article comprising an absorbent main body extending the entire longitudinal dimension of said crotch region and further partially extending into each of said front region and said back region, said absorbent main body comprising: 1) a water permeable topsheet, 2) a water impermeable backsheet, 3) an absorbent core disposed between said topsheet and said backsheet, and 4) a composite barrier sheet comprising: a) a pair of inner cuffs having a pair of side edges elasticallyized in said longitudinal direction with inner cuff elastics, and b) a front portion having a front longitudinal end point and a pair of front opening edges in said front region, wherein said front opening edges are free of elastic elements, wherein said front portion has a side longitudinal dimension Fl and a central longitudinal dimension F2, wherein F2 is from 30% to 85% of Fl, wherein said composite barrier sheet is bonded to the wearer-facing side of said topsheet by a pair of primary bonds extending in said longitudinal direction and secondary bonds extending in said transverse direction between said primary bonds, said front elastic belt is formed of an outer sheet, an inner sheet and a plurality of elastic strands extending in said transverse direction and sandwiched between said outer sheet and said inner sheet, said front elastic belt comprising a transfer elastic strand, said transfer elastic strand being at least one elastic strand superimposed with said front portion and said pair of primary bonds, wherein said absorbent core does not extend beyond the transverse edges of said primary bonds and does not extend beyond the front end of said secondary bonds.

2. The absorbent article according to claim 1, wherein said inner cuff elastics extend into said front portion.

3. The absorbent article according to claim 1 or 2, wherein said transfer elastic strand is not superimposed with said inner cuff elastics in said front portion.

4. The absorbent article according to claim 1 or 2, wherein each inner cuff has a transverse dimension Tl, wherein Tl (mm) and Fl (mm) have the following relationship: F1 ≥ 248.14 - 4.66 x T1 + 0.34 x (T1 - 40.79) 2 .

5. The absorbent article according to claim 1 or 2, wherein said primary bonds are bonds with pressure and heat.

6. The absorbent article according to claim 1 or 2, wherein said front opening edges comprise concave portions against said front portion.

7. The absorbent article according to claim 1 or 2, wherein said front opening edges form a portion of a sinusoidal curve.

8. The absorbent article according to claim 1 or 2, wherein said front opening edges are a series of straight lines.

9. The absorbent article of Claim 1 or 2, wherein at least one of the outer sheet and the inner sheet extends over the waist opening and is folded to form a folded portion, wherein the folded portion is bonded to the absorbent main body by a folded bond.

10. The absorbent article of Claim 9, wherein the folded portion is bonded to the front portion by a folded bond.

11. The absorbent article of Claim 9, wherein the folded bond and the secondary bond are superimposed on each other in the thickness direction.

12. The absorbent article of Claim 1 or 2, wherein the composite barrier sheet further comprises a back portion having back longitudinal end points and a pair of back opening edges, wherein the back opening edges are free of elastic elements, wherein the back portion has a side longitudinal dimension B1 and a center longitudinal dimension B2, wherein B2 is less than 95% of B1.

13. The absorbent article of Claim 1 or 2, wherein the entire length of the transverse edge of the front elastic belt is stitched with a certain length of the transverse edge of the back elastic belt to define a side seam length LS, the front elastic belt is divided into a plurality of zones that span in the transverse direction and are defined by their percentage location relative to the side seam length LS from a distal edge considered as 0% and a proximal edge considered as 100%, wherein the front elastic belt comprises a waist zone located at 0% to 25%, a distal tummy zone located at 25% to 50%, a proximal tummy zone located at 50% to 85%, and a leg zone located at 85% to 100% of the side seam length LS, respectively, wherein the proximal tummy zone has a stretch stress that is at least 50% higher than any other zone, wherein the front longitudinal end points are superimposed with the proximal tummy zone.

14. The absorbent article of Claim 1 or 2, further comprising a plurality of front leg elastics joined between the outer sheet and the inner sheet and extending from one side seam of the front elastic belt through the crotch zone to the other side seam of the front elastic belt, wherein a zone that matches the location of the front leg elastics at the side seams and spans in the transverse direction forms a front leg elastic zone, wherein the front longitudinal end points are superimposed with the front leg elastic zone.

15. The absorbent article of Claim 1 or 2, wherein any portion of the side seam comprises no more than 7 layers of substrates.

16. The absorbent article of Claim 1 or 2, further comprising a back waist guard formed by at least one of the sheets forming the back elastic belt, wherein the back waist guard comprises a pocket.

17. The absorbent article of Claim 1 or 2, wherein the inner sheet has an inner sheet hydrophilicity, the outer sheet has an outer sheet hydrophilicity, wherein the outer sheet hydrophilicity is greater than the inner sheet hydrophilicity.

18. The absorbent article of Claim 1 or 2, wherein T1 is from 25 mm to 50 mm, and F2 is from 20 mm to 90 mm.

19. The absorbent article of claim 18, wherein Tl is from 30 mm to 40 mm.

20. The absorbent article of claim 1 or 2, wherein the topsheet is provided with a first topography visible from the wearer-facing side, the composite barrier sheet is provided with a second topography visible from the wearer-facing side, wherein the first topography and the second topography are distinguishable from one another, the first topography and the second topography are each selected from the group consisting of color, opening, pattern, and combinations thereof.

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