Pant-type absorbent articles having waist guards

Abstract

A pant-type absorbent article having a waist guard on a back elastic belt is disclosed, wherein the waist guard includes a waist guard elastic portion. The absorbent article has a blowthrough percentage leakage of less than 4% when subjected to the blowthrough method herein.

Description

Technical Field

[0001] This invention relates to trouser-type absorbent articles having a waist support for preventing leakage of low-viscosity bodily fluids while maintaining other functions as trouser-type wearable articles. Background Technology

[0002] Infants and other individuals wear absorbent products (such as diapers) to receive and contain urine and other bodily fluids. Over-the-leg or pant-style absorbent products (such as those described in PCT Publication WO 2006 / 17718A) are those worn by inserting the wearer's legs into the leg openings and pulling the product up to the appropriate position around the lower body. Pant-style absorbent products have also become popular for younger infants who require a soft, snug fit around the waist and leg openings. Furthermore, pant-style absorbent products have become popular with women experiencing heavy menstrual flow or those needing to wear them overnight. One desired function for pant-style products is protection against leakage of low-viscosity bodily fluids through the waist opening. Pant-style products designed for breathability or otherwise with less material around the waist opening may pose a risk of leakage from the waist opening, especially when the wearer is lying on their back or stomach.

[0003] Trouser garments can employ various constructions, with sufficient elasticity around the waist opening to allow the wearer or caregiver to unfold the garment and insert the wearer's legs into the leg openings for putting it on. Therefore, due to structural limitations, trouser garments offer only a limited range of size or body profile adjustments. Consequently, trouser garments are typically constructed to accommodate a range of sizes and profiles by providing elastic bands that are highly stretchable and comfortable to wear, while also providing a reliable fit that offers sufficient protection against sag and leakage. It is expected that these fundamental functions of the elastic bands will be maintained even when the aforementioned protective measures are introduced.

[0004] Based on the foregoing, there is a need for an absorbent article with protective measures to effectively prevent leakage of low-viscosity bodily exudates from the lumbar opening. There is also a need for such an absorbent article that can be manufactured economically. Summary of the Invention

[0005] The present invention relates to an absorbent article having longitudinal and transverse properties, the absorbent article comprising a front elastic band, a rear elastic band, a crotch area, a waist opening and a pair of leg openings; the crotch area extends longitudinally between the front elastic band and the rear elastic band.

[0006] The absorbent article includes an absorbent body extending along the entire longitudinal dimension of the crotch area and further extending partially into each of the front and rear elastic bands. The absorbent body includes a liquid-permeable top sheet, a liquid-impermeable bottom sheet, and an absorbent material area sandwiched between them.

[0007] The entire length of the transverse edge of the front elastic band is sewn to a certain length of the transverse edge of the rear elastic band to define a pair of side seams with a seam length LS. These side seams may have a seam length LS of at least 90 mm, or at least 100 mm, or at least 110 mm, or at least 115 mm. The seam length LS may not exceed 180 mm or may not exceed 170 mm.

[0008] The rear elastic band is divided into multiple zones that span laterally and are defined by the percentage of the position of the rear elastic band from the distal edge (i.e., the edge that forms part of the waist opening) to the proximal edge (i.e., the edge that forms closer to the crotch area than the distal edge) relative to the seam length LS, wherein the distal edge is considered to be 0% and the proximal edge is considered to be 100%.

[0009] The waist protector is configured such that it extends from the closed baseline toward the opening edge toward the crotch area, wherein the waist protector is partially bonded to the rear elastic band to define a pocket, wherein the full pocket is located within approximately 5% to approximately 60% of the LS and the area of ​​the pocket overlaps with the film.

[0010] The front elastic band can be rectangular. The rear elastic band can also be rectangular. The front and rear elastic bands can be sewn together along opposite sides such that the distal edge of the front elastic band and the distal edge of the rear elastic band together form a continuous waist opening, and the proximal edge of the rear elastic band is closer to the transverse axis of the article than the proximal edge of the front elastic band.

[0011] The waist guard includes a waist guard elastic portion (WGEP). The waist guard elastic portion may be disposed in the area defining the pocket. The area of ​​the rear elastic band overlapping the waist guard elastic portion is defined as the associated portion. The tensile stress of the waist guard elastic portion differs from the tensile stress of the associated portion. The waist guard elastic portion (WGEP) may have a longitudinal dimension not greater than 60 mm, or may have a longitudinal dimension not greater than 40 mm. The longitudinal dimension of the WGEP may be at least 20 mm, or at least 22 mm. The longitudinal length of the WGEP may not exceed 35 mm, or not exceed 30 mm. If the longitudinal dimension of the WGEP is too small, the waist guard may not provide sufficient void volume to capture low-viscosity body extrudate. In this invention, the void volume of the absorbent article in the rear band is defined based on the blowout percentage leakage of the absorbent article. When subjected to the blowout test method described herein, the absorbent article has a blowout percentage leakage of less than 4.0%, or less than 3.0%, or less than 2.0%, or less than 1.0%, or less than 0.8%.

[0012] It has been found that, in order to effectively capture low-viscosity body extrusions, the waist guard of the absorbent article should be constructed such that the absorbent article has a blowout percentage leakage of less than 4%. For this test, a representative amount of artificial low-viscosity body extrusion has been placed in the absorbent article, and a test protocol has been established that reflects the state of use when the article is worn on the wearer and the body extrusion is trapped between the wearer's skin and the absorbent article. The extrusion is squeezed towards the back waist edge. By providing a properly constructed waist guard, most or all of the low-viscosity body extrusion is captured within the waist guard, thus preventing the extrusion from leaking out of the absorbent article along the back waist edge. If the pocket formed within the waist guard is positioned too low (i.e., too close to the crotch area), the body extrusion cannot be captured properly: some or most of the body extrusion may terminate between the skin and the pocket because they cannot enter the pocket due to the pocket's opening edge being too low. Furthermore, if the pocket is too small, the pocket provides too small a void volume to work effectively.

[0013] The absorbent product may have an efficiency factor of less than 15% when subjected to the blowout method described herein. The efficiency factor takes into account the dry weight of the absorbent product. The dry weight of the absorbent product may be less than 50 g. Dry weight means the weight of the absorbent product prior to use or any test, and is determined after the absorbent product has been conditioned at 23°C ± 3°C and 50% ± 2% relative humidity for at least 2 hours.

[0014] Absorbent products may also include barrier leg cuffs, which can also help capture and “traps” body extrusions.

[0015] Although it has been believed until now that the tensile stress of the elastic portion of the waist protector (as determined by the “band tensile stress measurement” described herein) should be relatively high and higher than the tensile stress of the related portion to allow the pocket to open properly during use, it has now been surprisingly found that the pocket also functions very well (as reflected by very low blowout percentage leakage) when the tensile stress of the elastic portion of the waist protector is indeed lower than that of the related portion. Pockets with tensile stress lower than that of the related portion provide a more comfortable absorbent article because the force exerted on the wearer’s skin in the area of ​​the elastic portion of the waist protector is reduced. Even though the related portion, which may have a higher tensile stress than the elastic portion of the waist protector, exerts a greater force on the skin than that exerted by the elastic portion of the waist protector, those forces are “buffered” between the related portion and the wearer’s skin by the elastic portion of the waist protector during use.

[0016] The elastic portion of the waist protection may have a tensile stress of 20 N / m to 70 N / m, preferably 20 N / m to 60 N / m, or 20 N / m to 50 N / m, as measured by the belt tensile stress measurement described herein.

[0017] To ensure a good overall fit of the absorbent article, the absorbent article of the present invention has a waist force greater than 5.6N or greater than 5.7N, as measured according to the waist force test method described herein. The absorbent article may have a waist force less than 20N, as measured according to the waist force test method described herein. Attached Figure Description

[0018] 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:

[0019] Figure 1 This is a perspective view of one embodiment of the absorbent article of the present invention.

[0020] Figure 2A The diagram shows a schematic plan view of one embodiment of the absorbent article of the present invention facing the surface of clothing, wherein the seams of the absorbent article are unjoined and in a flat, unshrinked state.

[0021] Figures 2B to 2C The diagram shows a schematic plan view of one embodiment of the invention with the seams of the strip facing the body, the strip being unjointed and in a flat, unshrinked state.

[0022] Figures 3A to 3C It is used to create L2 sections along the line. Figures 2A to 2CA schematic cross-sectional view of the precursor of the embodiment, in which the thickness dimension is exaggerated.

[0023] Figure 3D for Figures 2A to 2C A schematic cross-sectional view of the implementation scheme, in which the thickness dimension is exaggerated.

[0024] Figure 4 This is a side view of one embodiment of the trouser-shaped article of the present invention worn on a human body model.

[0025] Figure 5 This is a schematic diagram of a measuring tank based on a blowout testing method.

[0026] Figure 6 A schematic diagram of a test ball according to the blowout testing method.

[0027] Figure 7 This is a schematic diagram of an example of a hanging sample fixing fixture based on the "Force Value Measurement of the Whole Product" in 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 the 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] "Facing the body" and "facing the clothing" refer to the relative positions of components or the relative positions of the surfaces of a component or group of components, respectively. "Facing the body" means that during wear, a component or surface is closer to the wearer than some other components or surfaces. "Facing the clothing" 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] "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".

[0040] "Extensibility" and "stretchability" mean that the width or length of a component in a relaxed state can be extended or increased.

[0041] "Elastic" and "flexible" mean that a component includes at least a portion made of an elastic material.

[0042] 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 will be 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 will be 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).

[0043] 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.

[0044] "Works of art" refers to visual representations observable to the naked eye, provided through printing or other means, and possessing color. Printing includes a variety of methods and equipment well known to those skilled in the art, such as offset printing, screen printing, flexographic printing, and gravure inkjet printing.

[0045] 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

[0046] 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 garment surface, the seams of the absorbent article are unjoined and in their flat, unshrinked state. The absorbent article (20) has a longitudinal centerline L1 that also serves as a longitudinal axis, and a transverse centerline T1 that also serves as a transverse axis. The absorbent article (20) has a body-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.

[0047] Absorbent articles (20) can be as follows Figure 1 and Figures 2A to 2C 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"). The front elastic band and the rear elastic band (84, 86) form a discrete annular elastic band (40), which extends laterally to define a waist opening and is discontinuous in the longitudinal direction. For belted trousers, the discrete annular elastic band (40) may also be referred to as an elastic band (40). For example, Figure 1 and Figures 2A to 2C For belted trousers, the front elastic band and the back elastic band (84, 86) together with the absorbent body (38) define the leg opening. For belted trousers, the front elastic band (84) is the front area (26), the back elastic band (86) is the back area (28), and the rest is the crotch area (30).

[0048] Although not shown, the absorbent article (20) may be a one-piece trousers constructed such that the outer cover layer of the absorbent body (38) and the garment-facing layer of the elastic band (40) are common. 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).

[0049] The absorbent body (38) includes a top sheet, a bottom sheet, and an absorbent material area (62) disposed between the top sheet and the bottom sheet. The absorbent body (38) may further include an outer cover layer (42) facing the garment for covering the bottom sheet. The top sheet may be a water-permeable base. The bottom sheet may be a water-impermeable membrane. The outer cover layer (42) may be a nonwoven sheet. The absorbent body (38) includes an absorbent material area (62) and an absorbent material-deficient area (61) for absorbing and containing bodily fluids placed on the absorbent body (38), the absorbent material-deficient area surrounding the absorbent material area (62). The areas adjacent to the front longitudinal edge and the rear longitudinal edge of the absorbent body (38) include the bottom sheet. The absorbent material-deficient area (61) may be formed by the top sheet and / or the bottom sheet and / or the outer cover layer (42) and / or other components that constitute the absorbent body (38). Figures 2A to 2C In the illustrated embodiment, the absorbent body (38) has a generally rectangular shape, a left longitudinally extending side edge and a right longitudinally extending side edge (48), and a front laterally extending end edge and a rear laterally extending end edge (50). The absorbent material area (62) may be present throughout the entire longitudinal dimension of the crotch area and extend at least partially in the front and rear areas (26, 28). The absorbent body (38) may have a front waist piece (52) positioned in the front area (26) of the absorbent article (20), a rear waist piece (54) positioned in the rear area (28), and a crotch piece (56) in the crotch area (30) located between the front waist piece and the rear waist piece (52, 54). The center of the front elastic band (84) is joined to the front waist piece (52) of the absorbent body (38), and the center of the rear elastic band (86) is joined to the rear waist piece (54) of the absorbent body (38). The front elastic band and the rear elastic band (84, 86) each have a left and right side piece (82) in which the absorbent body (38) does not overlap. The absorbent body (38) has a crotch piece (56) positioned between the front waist piece (52) and the rear waist piece (54). In belted trousers, the front elastic band is indirectly joined to the rear elastic band along the longitudinal dimension through the absorbent body.

[0050] The absorbent material region (62) may include an absorbent layer and a collection layer. The absorbent layer is the region in which an absorbent material with high retention capacity, such as a superabsorbent polymer, is present. The absorbent layer may be substantially cellulose-free. The superabsorbent polymer of the absorbent layer may be disposed between a first material layer and a second material layer fixed by a fiber layer of thermoplastic binder material. The first and second material layers may 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 / sheath, or island-of-the-sea fibers. Such synthetic fibers may be formed via spunbonding or meltblowing. The collection layer facilitates the collection and distribution of bodily effluents and may be placed between the top sheet and the absorbent layer. The collection layer may include cellulose fibers.

[0051] The absorbent layer may be configured as multiple absorbent material regions (62). Some portions of the absorbent layer 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 material regions (62) to bend when swollen by the fluid, so that the absorbent article conforms to the wearer's body after swelling and prevents the article from sagging. The channels may also be formed in the absorbing layer and may be configured to at least partially match the channels of the absorbent layer in the thickness direction.

[0052] refer to Figure 1 The absorbent body (38) may include leg cuffs (64) made of a material with high fluid impermeability and elasticized to provide barrier along the two lateral edges of the absorbent body (38). Such leg cuffs (64) may be attached to the remainder of the absorbent body by bonding them to top plates at the two longitudinal edges of the absorbent body (38), such that, at least in the crotch area (30), the leg cuffs are dynamically elastic to provide a liner around the leg opening.

[0053] The elastic band (40) of the article of the present invention functions to dynamically generate a conforming force and distribute the dynamically generated force during wear. The front elastic band and the rear elastic band (84, 86) may join each other only at the side (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 opening may be provided by a combination of elasticity from the front elastic band (84), the rear elastic band (86), and the leg cuff (64).

[0054] The longitudinal lengths of the backing sheet and the outer cover layer (42) may be the same or different. For example, the outer cover layer (42) may have a shorter length than the backing sheet, resulting in the absence of the outer cover layer (42) where the absorbent body (38) overlaps with the elastic band (40). With this configuration, the elastic band can have better breathability. In addition, this configuration can provide cost savings. The transverse widths of the backing sheet and the outer cover layer (42) may be the same or different. For example, the backing sheet may have a shorter transverse width than the outer cover layer (42). With this configuration, the longitudinal side edges (48) of the crotch piece (56), which forms part of the leg opening, can have better breathability. In addition, this configuration can provide cost savings.

[0055] For belted trousers, the same longitudinal length LB of the rear elastic band (86) and the same longitudinal length LF of the front elastic band (84) can be provided, or the rear elastic band (86) can have the following characteristics: Figure 2A The larger longitudinal length LB is shown. (Reference) Figure 2AWhen the wearable article is assembled to form a waist opening and a leg opening, the wearable article (20) is folded along the transverse centerline T1 such that the front distal edge (88) is aligned with the rear distal edge (88). The front edge (89) is also aligned with a portion of the rear edge (89). The front elastic band (84) and the rear elastic band (86) are then joined at the seam (32) at the front and rear edges (89). However, the front proximal edge and the rear proximal edge (90) may not be aligned with each other. The rear proximal edge (90) may be positioned longitudinally closer to the transverse centerline T1 than the front proximal edge (90), such that the proximal portion of the rear side panel (82) extends beyond the front proximal edge (90) toward the crotch panel (56) of the body (38). The side edges of the proximal portion of the rear side panel (82) may not be joined to any part and may not contain any attachments. Therefore, the proximal portion of the rear side panel (82) provides a hip cover (95) (not shown).

[0056] The front elastic band (84) and the rear elastic band (86) are configured to impart elasticity to the band (40). Reference Figure 1 , Figure 2A and Figure 3DThe front elastic band (84) and the rear elastic band (86) may each include a laminate comprising a plurality of elastic members (96F, 96S) extending in a transverse direction, an inner sheet (94), an outer sheet (92), and one or more outer sheet folds (931, 932), wherein the outer sheet folds are extensions of outer sheet material formed by folding the outer sheet material at the distal edge (88) of the front and rear elastic bands; wherein the elastic members (96F, 96S) are sandwiched between the two sheets. The front elastic band (84) and the rear elastic band (86) may each consist only of the elastic members (96S), the inner sheet (94), the outer sheet (92), and the outer sheet folds (931, 932). The elastic members (96F, 96S) may extend transversely to provide an annular elastic band (40) when the front elastic band (84) and the rear elastic band (86) are joined. At least some of the elastic members (96F, 96S) extend substantially parallel to each other in the transverse direction. All elastic members (96F, 96S) may extend substantially parallel to each other in the transverse direction. Such articles can be economically manufactured. The front elastic band and the rear elastic band (84, 86) may each have transversely continuous proximal and distal edges, with the proximal edge (90) located closer to the longitudinal center of the article than the distal edge (88). At least 10%, or at least about 15% to no more than about 70%, of the front and rear elastic bands in the longitudinal direction from the waist opening may be a laminate in a state of active elasticity along the entire transverse dimension LW of the front and rear elastic bands (84, 86). For each front and rear elastic band (84, 86), the elastic activity of the area overlapping with the front and / or rear waist pieces (52, 54) of the absorbent body (38) may be removed. Such areas where elastic vitality is removed are referred to in this document as “elastic cut windows”, and the remainder of the complete elastic member that can impart elasticity is defined as “the effective elastic length of the elastic member”.

[0057] 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 (96F, 96S) extending laterally, the tensile stress can be adjusted by one or more of the following methods: 1) the elongation of the elastic members (96F, 96S); 2) the density (dentex) of the elastic members (96F, 96S); 3) the longitudinal spacing of the plurality of elastic members (96F, 96S); and 4) the effective elastic length of the elastic members (96F, 96S) in the transverse direction. The term "elongation," or "0% elongation," refers to the initial length of the elastic member.

[0058] refer to Figure 2A and Figure 2BThe front and rear elastic bands (84, 86) can each be divided into multiple zones that span laterally and are defined by the percentage of the position of the front and rear elastic bands from the distal edge (88) to the proximal edge (90) relative to the seam length LS, where the distal edge (88) is considered 0% and the proximal edge (90) is considered 100%. The multiple zones can be configured to provide different tensile stresses or different functions to the front and rear elastic bands (84, 86), respectively. In the absorbent article of the present invention, a waist guard WG is provided. The waist guard WG extends from the closed baseline (103B) toward the open edge (103M) toward the crotch area. The waist guard WG is partially integrated into the remainder of the rear elastic bands (84, 86) to define a pocket (103P). The waist guard WG can be positioned within 25%-60% of the LS on the rear elastic bands (84, 86). Figure 1 Such a waist protector WG on the rear elastic band is depicted. The waist protector WG can be shorter, such that it spans less than 5%-60% of the entire LS. The waist protector WG can be positioned at about 5% to about 55% of the LS, or about 5% to about 50% of the LS, or about 10% to about 55% of the LS, or about 10% to about 50% of the LS, i.e., the entire waist protector WG can be set within these preferred ranges. Without being bound by theory, by providing a waist protector (WG) of this size on the rear elastic band (86), the wearer's groin is effectively covered by the waist protector (WG), allowing low-viscosity exudates (such as loose feces or blood) to be effectively drawn into the pocket.

[0059] As in Figure 2B , Figure 2C and Figures 3A to 3D As exemplarily shown (but not limited to the embodiments shown in these figures, but applicable to all absorbent articles of the invention), the waist protector WG may be made from an extension of an outer piece (92) extending beyond the longitudinal dimension of the inner piece (94), the extension of the outer piece (92) being folded inward twice to surround at least a first elastic member (96F), and further providing the waist protector WG in the intended position relative to the side seam length LS. Due to the two folds (F1 and F2), at least the first elastic member (96F) is sandwiched between the first outer piece fold (931) and the second outer piece fold (932), wherein the first outer piece fold (931) forms the garment-facing side of the waist protector WG, while the second outer piece fold (932) forms the body-facing surface. When the article is in use, the second outer piece fold (932) can directly contact the wearer's skin. Reference Figure 2C and Figure 3DA certain longitudinal dimension from the distal edge of the second outer flap fold (932) can be bonded to the remainder of the strap; however, such bonding, shown as SWFA, leaves some unbonded longitudinal dimensions. The first outer flap fold (931) can be bonded to the second outer flap fold (932), such bonding being shown as FWFA. The location at the farthest end of the unbonded area is the closed baseline (103B), and the common proximal edge of the first outer flap fold (931) and the second outer flap fold (932) is the open edge (103M). The waist guard WG is defined as having a longitudinal dimension spanning the closed baseline (103B) and the open edge (103M), and a transverse dimension matching the width of the provided strap. The left and right transverse edges of the waist guard WG can also be bonded to the remainder of the strap, such bonding being shown as SWFA. Preferably, bonding is performed by an adhesive. The adhesive can be water-based, which can help prevent low-viscosity effluents from seeping out of the pocket nonwoven material. The adhesive (such as a hydrophobic adhesive) can be a hot melt adhesive. To determine whether a hot melt adhesive is hydrophobic, a portion of the hot melt adhesive is melted and spread on a uniform horizontal surface, such as a table, to form a film. A drop of water is then dropped onto the film, and the contact angle is determined, as is well known in the art. If the contact angle exceeds 90°, the adhesive is hydrophobic. The unbonded area thus provided and defined by the closed baseline and the left and right lateral edges is the pocket (103P). The adhesive portion that defines the area of ​​the pocket (103P) is therefore configured to provide a pocket (103P) that substantially overlaps the film, preferably fully overlapping the film in the longitudinal dimension parallel to the longitudinal centerline of the article and in the lateral direction parallel to the transverse centerline of the article.

[0060] The adhesive portion (shown as SWFA) may overlap the film by at least 5 mm or at least 10 mm along each of the left and right edges of the pocket, wherein the corresponding portions of the edges of the adhesive portion may define and thus define the left and right edges of the pocket. Furthermore, the adhesive portion (shown as SWFA) may overlap the film by at least 5 mm or at least 10 mm along the closed baseline of the pocket, wherein the corresponding portions of the edges of the adhesive portion may define and thus define the closed baseline of the pocket.

[0061] Unbound by theory, by providing a pocket (103P) that is essentially superimposed on the film, this prevents low-viscosity effluent and / or low-surface-tension effluent that has entered the pocket (103P) from flowing out or permeating through the pocket (103P) toward the waist opening or lateral edge.

[0062] refer to Figure 2BAt least a first elastic member (96F) provides a waist protection elastic portion WGEP, which may be made elastic by one or more elastic strands, elastic bands, mechanically activated nonwoven fabric, or otherwise. The waist protection elastic portion WGEP is defined as having a longitudinal dimension (1031) extending from the opening edge (103M) to the distal edge of at least the first elastic member (96F). When the first elastic member (96F) is multiple elastic strands, the distal edge of the waist protection elastic portion WGEP is the position where the elastic strands are positioned furthest from the opening edge of the waist protector (along the longitudinal dimension of the absorbent article). There may be 2-10 elastic strands, or 2-5 elastic strands, or 2-8 elastic strands, or 3-4 elastic strands, or 3-8 elastic strands, or 4-6 elastic strands provided on the waist protection elastic portion. The longitudinal dimension of the waist protection elastic portion WGEP may be smaller than the longitudinal dimension of the waist protector WG, so that a pocket (103P) with a capacity can be provided. The longitudinal dimension of the elastic portion (WGEP) of the waist protection may not exceed about 40 mm, or not exceed about 35 mm, or not exceed about 30 mm, or not exceed 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. The distance between the two elastic strands closest to the opening edge of the waist protection may be less than the distance between any other adjacent elastic strands in the elastic portion of the waist protection. Alternatively or otherwise, the distance between the opening edge and the elastic strand closest to the opening edge may be equal to or less than the distance between the two elastic strands closest to the opening edge of the waist protection. Alternatively or otherwise, the number of elastic strands adjacent to the opening edge may be greater than the number of elastic strands farther from the opening edge, where "far from the opening edge" means a further 50% distance of the pocket from the opening edge.

[0063] Pockets can have a rectangular shape (such as in...) Figure 2B and Figure 2C (Exemplary example shown), however, the pocket (103P) can take other shapes by changing the bonding area SWFA, such that the closure baseline (103B) defining the pocket and / or the left and right lateral edges are shaped. For example, the closure baseline (103B) can be concave or convex toward the pocket (103B) to match the wearer's body structure. The closure baseline (103B) of the waist protector can also be straight and parallel to the distal edge of the rear elastic band (86). The left and right lateral edges can be such that the width of the pocket increases or decreases along the longitudinal dimension from the closed edge of the pocket to the open edge.

[0064] The pocket (103P) is defined as the shortest distance between the closed baseline (103B) and the opening edge (103M), and its longitudinal dimension extending parallel to the longitudinal centerline of the article can be about 10 mm to about 50 mm, or about 12 mm to about 40 mm, or 20 mm to 30 mm. For pockets having a closed baseline (103B) that is (not straight, but, for example, concave or convex), the position of the distal edge of the closed baseline (103B) closest to the rear elastic band (86) can also be set within 55% to 60% of the LS, or 5% to 55%, or 5% to 50%, or 10% to 50%, because the complete waist protection WG is set within 5% to 60% of the LS.

[0065] The lateral dimension of the pocket (103P) is defined as the longest distance from the left edge to the right edge of the pocket along the lateral center line parallel to the article. The left and right edges extend between the closed baseline and the open edge of the pocket. The lateral dimension of the pocket (= pocket width) can be 40% to 96%, 50% to 95%, or 60% to 95% of the lateral dimension (= patch width) of the lateral extension edge of the backing sheet located in the back waist area. The lateral extension edge of the backing sheet can extend parallel to the lateral center line of the absorbent article.

[0066] The lateral dimensions of the pocket can be 40mm to 120mm, or 50mm to 100mm, or 60mm to 90mm. The pocket may have a minimum distance, parallel to the lateral center line of the article, extending from the left edge of the pocket to the right edge of the pocket. This minimum distance may be the same as the longest distance of the pocket (such that there is no difference between the longest and shortest distances), or the shortest distance of the pocket may be at least 70%, at least 80%, or at least 90% of the longest distance of the pocket.

[0067] By providing a waist protector at approximately 5% to 60%, preferably to 55%, and more preferably to 50% of the LS dimension, the waist protector is configured to reduce the likelihood that the opening edge (103M) of the pocket will cover the wearer's buttocks. The article of the present invention is also suitable for infant / toddler trousers, which are already more active than newborns. However, increased activity generally results in a greater likelihood of the article sagging, causing the waist edge (= the distal edges of the front and back straps) to shift downwards during use. Therefore, the waist protector (including its opening edge) also tends to shift downwards during use. To address and counteract such movement, the opening edge can be provided high enough (in the longitudinal dimension, i.e., towards the distal edge of the back strap) to reduce or avoid the risk of the opening edge overlapping with the buttocks. If the opening edge overlaps with the buttocks, the pocket may not be able to properly receive feces.

[0068] like Figure 2B and Figure 3DIn the illustrative examples (but not limited to the embodiments shown in these figures, but applicable to all absorbent articles of the present invention), the remaining portion of the strap superimposed on the waist protection elastic portion WGEP is defined as the related portion CP. That is, the related portion CP has the same longitudinal dimension (1031) as the waist protection elastic portion WGEP. The related portion CP may be elasticized or may not be elasticized. The tensile stress of the waist protection elastic portion WGEP differs from the tensile stress of the related portion CP. The difference between the tensile stress of the waist protection elastic portion WGEP and the related portion CP may be at least about 25% or at least about 50%. Without being theoretically constrained, such a difference in tensile stress allows the waist protection elastic portion WGEP to make close contact with the wearer while pulling open the opening edge (103M) from the related portion CP, thereby opening the pocket (103P) towards the proximal side. Thus, the pocket (103P) is constructed to have good capacity. The related portion CP may have elastically cut windows such that some portions are elasticized while the lateral center does not interfere with the opening of the pocket (103P). When the lumbar support elastic portion WGEP is elasticated by incorporating multiple elastic strands (96F), each elastic strand is positioned at a distance of not less than 2mm to 5mm from the opening edge (103M). This avoids placing the elastic strand at the extreme edge of the opening edge (103M), thus preventing irritation to the wearer from the lumbar support area WG. The lumbar support elastic portion WGEP can be incorporating multiple elastic strands (96F), with relatively small spacing between them. The elastic strands (96F) of the lumbar support elastic portion WGEP can be spaced at intervals of no more than about 12mm, or no more than about 10mm, or no more than about 6mm, or from about 2mm to about 8mm, or from about 3mm to about 9mm, or from about 2mm to about 6mm.

[0069] The elastic strands (96F) used to provide the lumbar support elastic portion WGEP can be colored so that the presence and function of the lumbar support WG are clearly communicated to the wearer or caregiver. At least two elastic strands used to provide the lumbar support elastic portion WGEP may have a color visible from the body-facing side of the garment. This color may be selected from green, blue, purple, or combinations thereof for easy identification without confusion with the contained color. The same or similar color may be used for other elastic strands (96S) set on the belt to provide a harmonious appearance. For example, those elastic strands on the front lumbar region (102) or the rear lumbar region (102) may have the same or similar color.

[0070] The waist protector WG can be constructed relative to the absorbent body in a certain way to provide improved functionality. As described above, the area of ​​the pocket (103P) is therefore constructed to provide a pocket (103P) that substantially overlaps the film, preferably fully overlapping the film. Figure 2C and Figure 3D As illustrated in the examples (but not limited to the embodiments shown in these figures, but applicable to all absorbent articles of the present invention), the longitudinal edge of the absorbent body (38) may be positioned and bonded between the waist guard WG and the remainder of the belt. This avoids having sharp edges of the absorbent body (38) on the body-facing surface and also avoids leakage from the edges. The absorbent body (38) includes an absorbent material area (62) which may be surrounded by an absorbent material deficiency area (61), wherein the thickness of the absorbent material area (62) is greater than the thickness of the absorbent material deficiency area (61). The absorbent material area (62) may partially overlap the area of ​​the pocket (103P) to provide at least some absorbency in that area. At least about 3%, or at least about 10%, or at least 20%, or at least 30%, or at least 40% of the area of ​​the pocket (103P) may overlap with the absorbent material area (62) facing the proximal edge. Even so, the total thickness of the waist protection elastic portion WGEP, the related portion CP, and the portion of the absorbent body (38) sandwiched between them can be kept to no more than about 5 mm, preferably no more than about 4 mm. This is because, due to the elasticity of the waist protection elastic portion WGEP, the thickness of the rest of the article will not interfere with the opening of the pocket (103P) toward the proximal side.

[0071] The waist guard WG, on which the band is disposed, can be divided into three zones that span laterally and are defined by the percentage of the position of the waist guard WG from the distal edge (88) to the proximal edge (90) relative to the seam length LS, wherein: 0% to the distal edge of the waist guard WG is the waist zone (102), and the distal edge to the proximal edge to the protection zone (103) of the waist guard WG, and the proximal edge to 100% of the waist guard WG is another zone. When there is an elastic member disposed at the distal or proximal edge of the protection zone (103), such an elastic member is considered to be included in the protection zone (103). The elastic member may be disposed on the remainder of the protection zone (103), which overlaps with the unelasticized area of ​​the waist guard WG.

[0072] The lumbar support WG can be constructed in a specific manner relative to a pair of leg cuffs (64) positioned along the two lateral edges of the absorbent body (38) to provide improved functionality. For a belt including the lumbar support WG, the leg cuffs (64) can be in a dynamic elastic position at the point where they intersect with the open edge (103M). By providing a dynamic elastic leg cuff in such a position, the combined elasticity from the leg cuffs and the lumbar support elastic portion WGEP helps to keep the leg cuffs (64) and the lumbar support WG in close contact with the wearer and further provides additional capacity for the pockets (103P).

[0073] like Figure 2A and Figure 2BThe embodiments illustrated (but not limited to those shown in these figures, but applicable to all absorbent articles of the present invention) are provided with a rear elastic band (86) of the lumbar support WG that can be divided into three zones that span laterally and are defined by the percentage of the position of the lumbar support WG from the distal edge (88) to the proximal edge (90) relative to the seam length LS, wherein: 0% to the distal edge of the lumbar support WG is the lumbar zone (102), the distal edge to the proximal edge of the lumbar support WG is the protection zone (103), and the proximal edge to 100% of the lumbar support WG is the hip zone (105). The rear elastic band may further have a hip coverage area (110), wherein the longitudinal dimension of the rear elastic band LB exceeds LS. The anterior elastic band can be divided into four zones: 0-25% is the lumbar zone (102), 25%-50% is the distal abdominal zone (104), 50%-85% is the proximal abdominal zone (106), and 85%-100% is the leg zone (108). When an elastic member is provided at 25% of the distal edge (88), such an elastic member is considered to be included in the lumbar zone (102). When an elastic member is provided at 50% or 85% of the distal edge (88), such an elastic member is considered to be included in the proximal abdominal zone (106).

[0074] The tensile stress in the protected area (103) can be higher than that in the posterior lumbar region (102) or the hip region (105). The tensile stress in the anterior proximal abdominal region (106) can be higher than that in the anterior lumbar region (102), the anterior distal abdominal region (104), or the foreleg region (108). The tensile stress in the anterior proximal abdominal region (106) can be higher than that in any other region of the anterior or posterior region. When comparing the entire anterior and posterior elastic band regions, the maximum tensile stress is provided in the following order: the anterior proximal abdominal region (106), and then the protected area (103). Without being bound by theory, it is believed that such tensile stresses, distributed regionally, provide the article of the invention with a shaped elastic band (40) that conforms well to the human body (such as...). Figure 4 Specifically, it is designed to fit the lower body of children under 36 months of age, thus providing the wearer with a good fit and comfort without the need for sagging or leakage prevention. That is, the anterior proximal abdominal area (106) is subjected to high tensile stress, which allows the garment to be anchored against the wearer's trochanter, while leaving more area for the hip area (105) to adapt to the wearer's buttocks.

[0075] like Figures 3A to 3DAs illustrated in the examples (but not limited to the embodiments shown in these figures, but applicable to all absorbent articles of the invention), the elastic band of the invention can be made with a relatively simple structure comprising only an inner sheet (94), an outer sheet (92), a first outer sheet fold (931), a second outer sheet fold (932), and a first elastic member and a second elastic member (96F, 96S) contained within these layers. The first outer sheet fold (931) may be at least equal to, or preferably greater than, the length of the pocket side edge of the pocket, which provides double protection provided by the outer sheet layer formed by the first and second outer sheet folds. This double-layer structure helps to reduce or prevent the permeation of low-viscosity and low-surface-tension bodily effluents through the pocket onto the wearer's body. Any portion of the elastic band, including the waist protection element WG, may be made in fewer than 6 layers, or in 3-4 layers, with a thickness not exceeding about 5 mm or about 4 mm. Providing a simple and relatively thin band structure is advantageous in maintaining the breathability and flexibility of the band. Furthermore, the elastic band may be made of elastic strands commonly used in the art, with a density not exceeding 940 dtex. Certain areas of the band may be provided with an elastomer with a density not exceeding about 600 dtex or not exceeding 580 dtex, thereby providing a soft fit. An elastomer with a density not exceeding about 500 dtex may be provided on one or more of the waist area (102) or the foreleg area (108). Without being bound by theory, it is believed that relatively low-density elastomers provide an easy initial stretching experience when stretching the open article (20) while maintaining a good fit during wear. The article of the present invention can provide protection against leakage of low-viscosity body fluids from the waist opening while maintaining good stretch for easy wear, good fit to prevent sagging, good comfort and softness, and good breathability. The article of the present invention may have a waist force measured according to the full article force values ​​herein, which does not exceed about 9 N or about 8 N.

[0076] refer to Figure 1 , Figure 2A and Figure 3D Even when the back elastic band (86) includes the waist guard WG, the remainder of the back elastic band (86), and particularly the garment-facing surface of the back elastic band (86), can remain in a simple structure. This allows the article to have other functions required for trouser-type absorbent articles, such as having a dispensing tape attached to the garment-facing surface of the back elastic band (86). Therefore, the absorbent article may be free of fastening devices.

[0077] Leg braces and leg elastic components

[0078] The absorbent body of the absorbent article may include one or more pairs of blocking leg cuffs 32 (not shown) and one or more pairs of leg elastic members (64). The blocking leg cuffs may be positioned laterally inside the leg elastic members (64). Each blocking leg cuff may be formed of a material element bonded to the absorbent body, such that when the absorbent article is worn, each blocking leg cuff extends upward from the wearer-facing surface of the absorbent body and provides improved containment of bodily effusions near the junction of the wearer's torso and legs. The blocking leg cuffs are defined by proximal edges and free end edges directly or indirectly bonded to the top and / or bottom pieces, and are designed to contact and form a seal with the wearer's skin. The blocking leg cuffs may extend at least partially between the front lateral extension edge and the rear lateral extension edge (50) of the absorbent body along and adjacent to each of the two side edges (48), and may be present at least in the crotch area and may extend into the front and rear waist areas. The blocking leg cuff may include one or more elastic elements (e.g., elastic strands or strips) near or at the free end edge. These elastic elements enable the blocking leg cuff to facilitate a seal around the wearer's legs and torso. The leg elastic elements extend at least partially between the two laterally extending end edges (50) of the absorbent body. The leg elastic elements essentially enable portions of the absorbent article near the two (i.e., left and right) side edges (48) of the absorbent body to facilitate a seal around the wearer's legs. The leg elastic elements may extend at least within the crotch area 14.

[0079] Test methods

[0080] Blowout testing methods

[0081] A blowout is defined as an artificial, viscous body fluid (referred to as "artificial BM" in this test method) that is discharged onto or beyond the waistband or waist region of an absorbent article. The absorbent article, in the form of trousers (i.e., the type of absorbent article involved in this invention), is cut along the side seam.

[0082] Next, the width of the rear elastic band is measured by applying a 1,000 kg weight across the side edge formed by the previously cut side seam along the rear elastic band. One side edge of the rear elastic band is clamped in a 5 cm wide flat jaw clamp, centered on the last centimeter of the side edge of the rear elastic band, with a clamping depth of 1 cm. The rear elastic band is suspended vertically, and the 1,000 kg weight is attached to the same clamp positioned in the same manner and location on the other side edge of the rear elastic band, and the weight is manually and slowly released. After 30 seconds, the width of the rear elastic band is measured from clamp to clamp, and 2 cm is added to the result. The result is rounded to the next centimeter.

[0083] If the width of the front elastic band is significantly different from the width of the rear elastic band (as can be easily assessed by simply stretching the front and rear elastic bands by hand), then the width of the front elastic band should be determined in the same way as the width of the rear elastic band.

[0084] The same procedure described above is used to measure the length of the absorbent article by applying a 0.300 kg weight. The absorbent article is clamped across its longitudinal centerline at the last centimeter of its rear edge in a 15 cm wide flat jaw clamp (centered on the longitudinal centerline) to a clamping depth of 1 cm. The absorbent article is suspended vertically, and the 0.300 kg weight is attached to the same clamp set in the same manner and position on the front edge of the absorbent article, and the weight is manually and slowly released. The length of the absorbent article is then measured from clamp to clamp after 30 seconds, and 2 cm is added to the result. The result is rounded to the next centimeter.

[0085] The groove is made of a straight block of a rigid material (e.g., nylon) with a flat, planar upper surface. This planar upper surface has a width at least equal to those widths of the absorbent article as measured above, a length at least 10 cm longer than the length of the absorbent article as measured above, and a depth of at least 5 cm. A channel is machined into the block, extending downwards along the entire length of the block's center, and is part of a circle with a radius R = 12.70 cm. The width W of the groove is 10.16 cm and the depth D is 2.54 cm (see [link to relevant documentation]). Figure 5 ).

[0086] All tests were performed in a room controlled at 23℃±3℃ and 50%±2% relative humidity. Samples were conditioned at 23℃±3℃ and 50%±2% relative humidity for at least two hours prior to testing.

[0087] The absorbent material is placed flat on the upper surface of the block (top sheet facing upwards and bottom sheet taut), extended to the previously measured width and length dimensions, and secured with tape. The longitudinal centerline of the absorbent material is aligned with the centerline of the groove. The rear edge is positioned 10 cm inside the groove edge.

[0088] The application point for saline and artificial BM is half the length of the absorbent material stretched along the longitudinal center line. Weigh and fold two paper towels to 15×15cm and position them flat at the back edge of the absorbent material, with 1cm of paper towel inserted between the absorbent material and the upper surface of the block at the back edge to collect artificial BM.

[0089] brine

[0090] Dissolve 9g of NaCl in 1000ml of H2O.

[0091] The synthetic BM is a 0.5% aqueous solution of Lubrizol 981 (Carbopol).

[0092] Preparation of -1000g

[0093] Carbopol (5.0g + / - 0.1g)

[0094] Distilled water (945.0g + / - 0.1g) in a 2000ml beaker

[0095] 1M NaOH solution (50.0g ± 0.1g)

[0096] Food colorings, (e.g., purchased from) or similar items, The ingredients of food coloring agents are water, propylene glycol, Yellow 5, Red 40, Blue 1, citric acid, and sodium benzoate.

[0097] - Mixing and adding procedure:

[0098] Take a 2000ml beaker and distilled water and place a stirrer (e.g., a 3-bladed propeller with a diameter of 55mm) so that the propeller is 2cm below the water surface.

[0099] Start stirring at 1100 rpm

[0100] Add Carbopol evenly over 10 seconds.

[0101] Stir at 1100 rpm for 30 minutes.

[0102] Add the NaOH solution evenly over 10 seconds.

[0103] Add 2 drops of food coloring and stir at 1100 rpm for 30 minutes.

[0104] Quality inspection of artificial BM

[0105] equipment:

[0106] Brookfield rotor viscometer or equivalent

[0107] Standard 28mm Brookfield rotor / 22.3℃ / 600 RPM

[0108] For artificial blowout testing, the viscosity of the solution must be between 3300 cp and 4800 cp.

[0109] program

[0110] The following amounts of saline solution and synthetic BM are used in absorbent products of different weight ranges:

[0111] • For absorbent products with a total dry weight of up to 30.0g: 2 times 50.0ml saline and 1 times 100.0g artificial BM.

[0112] • For absorbent products with a total dry weight equal to or greater than 30.0g and up to 50.0g: 2 times 75.0ml saline and 1 times 150g artificial BM.

[0113] • For absorbent products with a total dry weight equal to or greater than 50.0g: 3 times 75.0ml saline and 1 times 200g artificial BM.

[0114] The artificial BM is measured to an accuracy of + / - 0.5 g by filling a beaker with a syringe having a nozzle with a width of 5 mm to 10 mm. The saline solution is measured to volume using a 100 ml syringe. The 0.9% saline solution is administered at a rate of 5 ml / second. A 60-second waiting time is allowed after administering 50 ml / 75 ml (depending on the dry weight of the product, see above) of saline solution. The 0.9% saline solution is then administered again at a rate of 5 ml / second, and a 60-second waiting time is allowed after completion.

[0115] Then administer the artificial BM at a rate of 10 ml / second, followed by a 60-second waiting period after administration.

[0116] A 10.2cm diameter ball with a horizontal axis (approximately 26cm long and 1.5cm in diameter) weighing 580g (including the ball and axis) is placed on the front waist region 50mm inside the front waist edge of the absorbent, centered in the groove, with the axis horizontal and perpendicular to the longitudinal axis of the groove. Manually roll it back at 10cm / s using a stopwatch without applying downward pressure until the axis is 3.00cm inside the rear waist edge of the absorbent. Then, lift the ball vertically away from the absorbent. Carefully remove the paper towel (which may have been compressed with artificial BM). Now, using the same towel, carefully scrape and collect all the artificial BM that can be deposited on the upper surface of the absorbent within the area between the rear waist edge and 5cm inside the rear waist edge (the longitudinal dimension of this area), and this area is as wide as the absorbent body of the absorbent (the transverse dimension of this area). Then, weigh the paper towel and calculate the blowout percentage leakage as follows:

[0117] Blowout percentage leakage [%] = ((grams of leaked synthetic BM (collected on a balanced paper towel) / total grams of applied synthetic BM)) * 100

[0118] Repeat the test 3 to 4 times on the same absorbent material. Report the reported percentage of blowout leakage [%] as the average of the replicates and calculate to within + / - 0.01%.

[0119] Force measurement of the whole product

[0120] 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.

[0121] The tension tester is equipped with a hanging sample holder (300), such as Figure 7 As shown. Each fixture includes a rigid, linear, rubber-coated horizontal bar segment (302) to prevent the sample from slipping 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:

[0122] Gauge length perimeter = 2 × (H + D + πD / 2)

[0123] Where H is the vertical gap between the horizontal bar segments (302), and D is the outer diameter of the bar.

[0124] The instrument is set up by following these steps:

[0125] Final load point 19.61N Duration 0 Cycle number 1 Data acquisition rate 50Hz

[0126] 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 its longitudinal centerline L1 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. Begin the test and move the chuck upward at 254mm / min until a force of 19.6N is obtained, then immediately return the chuck 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.

[0127] 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.

[0128] Belt tensile stress measurement

[0129] Tensile stress (N / m) is calculated by dividing the tension (N) by the sample 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.

[0130] To obtain the sample, the sample article is cut along the side seam (32), and the front and rear elastic band segments are removed from the absorbent body (38) by separating the adhesive between the front and rear elastic band segments (40) and the absorbent body, and further, the waist guard WG is separated from the band to which it is attached. Cold spraying can be used, taking care not to cause wrinkling in the band portion. Take care not to spray on any elastic members (96F, 96S). According to the invention, the obtained elastic band is cut into sections (102, 103, 1031-WGEP, 1031-CP, 104, 105, 106, 108), taking care not to cut any elastic members (96F, 96S). Before testing, the sample is preconditioned for two hours at 23°C ± 2°C and 50% ± 5% relative humidity.

[0131] 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.

[0132] Data acquisition rate 50Hz Final gauge length 0.5 × full stretch circumference Duration 0 Cycle number 1

[0133] Clamp one end of the sample into the upper clamp and apply a balanced load. Clamp the other end of the sample into the lower clamp. Approximately 5 mm of each end of the sample should be behind the contact line of the clamps. Begin the test and extend the sample 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 sample extends laterally along the article. Record the unloading force at 70% of the final gauge length during the unloading phase of the test.

[0134] For each zone, three articles were analyzed and the unloading forces were recorded. The average tensile force (N) was calculated for each closest to 0.01N. The tensile stress in each zone was calculated and reported by dividing the average tension (N) by the average sample width (m), accurate to 0.1N / m.

[0135] Stacking height inside the bag

[0136] The following determines the stacking height inside the bags of absorbent products:

[0137] equipment

[0138] A thickness tester with a flat, rigid horizontal slide plate is used. The thickness tester is configured such that the horizontal slide plate moves freely in the vertical direction, always remaining horizontally oriented directly above the flat, rigid horizontal substrate. The thickness tester includes a device for measuring the gap between the horizontal slide plate and the horizontal substrate, accurate to within +0.5 mm. The horizontal slide plate and the horizontal substrate are larger than the surface of the absorbent product package that contacts each plate, i.e., each plate extends beyond the contact surface of the absorbent product package in all directions. The horizontal slide plate applies a downward force of 850 g ± 1 g (8.34 N) to the absorbent product package, which is achieved by placing a suitable weight at the center of the top surface of the horizontal slide plate that is not in contact with the package, such that the total mass of the slide plate plus the added weight is 850 g ± 1 g.

[0139] Test Procedure

[0140] Prior to measurement, the absorbent product packaging was equilibrated at 23℃±2℃ and 50%±2% relative humidity.

[0141] Lift the horizontal slide and center the absorbent product package below it, such that the absorbent product inside is horizontally oriented (see Figure 14). Fold any handles or other packaging features on the surface of the package against the surface of the package to minimize their impact on the measurement. Slowly lower the horizontal slide until it contacts the top surface of the package, and then release it. Ten seconds after releasing the horizontal slide, measure the gap between the horizontal slides, accurate to within +0.5 mm. Measure five identical packages (packages of the same size and the same number of absorbent products) and report the arithmetic mean as the package width. Calculate and report “Inner Stack Height” = (Package Width / Number of Absorbent Products per Stack) × 10, accurate to within +0.5 mm.

[0142] Example

[0143] Three different configurations of the waist protection pocket were tested. Furthermore, many absorbent articles currently available on the market were studied as comparative examples of the present invention.

[0144] Comparative example: Commercially available baby diapers

[0145] Comparative Example 1: Moony purchased in Japan TM (Size M)

[0146] Comparative Example 2: Pampers Baby Dry Pants, commercially available in Germany TM (Size 5)

[0147] Comparative Example 4: DM purchased in Germany TM Premium Pants Junior(13kg-20kg)

[0148] Comparative Example 3: Mamia Ultra Dry UK purchased in the UK TM (Size 4)

[0149] Comparative Example 5: Huggies Russia Pants purchased in Russia TM (8kg-14kg)

[0150] All tested products were trouser-type diapers commercially available in the first half of 2021. While both Pampers absorbent products have an absorbent core that does not contain any breathable felt (i.e., no cellulose fibers, in lieu of which all absorbent material is superabsorbent polymer particles), all other commercially available absorbent products have absorbent material that is a mixture of superabsorbent polymer particles and breathable felt.

[0151] Description of Example 1

[0152] Carefully remove the back elastic band (the combination of inner and outer panels with elastic strands between them) of the Pampers BabyDry Pants (size 5) available in Germany during the first half of 2020 using an ice spray. Carefully hold the remaining fabric (the combination of front elastic band and absorbent body) aside. For each absorbent fabric, a new back elastic band with waist protection is made by attaching a series of elastic strands between the inner and outer panels using hot melt adhesive.

[0153] For the back elastic band, a 13gsm nonwoven material (spunbond-meltblown-spunbond, i.e., SMS) is used as the outer sheet, which is cut into rectangles 405mm in the transverse direction and 240mm in the longitudinal direction. Hot melt adhesive is applied in a spiral at 5g / m², starting 50mm from the inner edge of the sheet and spanning the entire transverse and 40mm longitudinal directions. 2 The basis weight is applied to the outer nonwoven material. Four 940-point extra-elastic strands (the first set of elastic strands) are used at 210% elongation and bonded to a spiral hot-melt adhesive over a 40mm length and width. These four 940-point extra-elastic strands are part of the waist protection elastic section and have different spacing between the elastic components. The first two elastic components are 3mm apart, the third elastic component is 7mm apart from the second elastic component, and the fourth elastic component is 7mm apart from the third elastic component. The outer sheet with a 50mm longitudinal dimension is folded longitudinally next to the innermost elastic strand (i.e., the elastic strand furthest from the edge of the sheet) to completely enclose the four elastic strands.

[0154] Starting 20mm away from the fourth 940-point special elastic component (first group of elastic components), it spans the entire transverse and longitudinal directions by 35mm in a spiral pattern at 5g / m. 2 The base weight is applied with a second series of hot melt adhesive, with four additional 470-point extra-elastic strands used at 190% elongation and bonded to the spiral hot melt adhesive throughout the transverse direction. Compared to the first set of 940-point extra-elastic strands, all four elastic strands are spaced 10 mm apart and located on the inner longitudinal side.

[0155] Starting 15mm away from the fourth 470-point elastic component (second group of elastic components), it spans 70mm across the entire transverse and longitudinal direction in a spiral pattern at 5g / m. 2The base weight of the third series of hot melt adhesive is applied, using ten 470-point extra-elastic strands at 240% elongation and bonded to the spiral hot melt adhesive along the entire transverse direction. These ten elastic strands are bonded in five pairs of two elastic strands. For the first four pairs of elastic strands, each elastic strand is spaced 3 mm from the other elastic strand in that pair, and the first four pairs of elastic strands have a 15 mm spacing between these pairs. The fifth pair of elastic strands has a 10 mm spacing between the elastic strands and a 10 mm spacing from the fourth pair of elastic strands, and is located longitudinally inside relative to the second series of 470-point extra-elastic strands. These five pairs of elastic strands are cut transversely to create a 100 mm wide intermittent window, in which no elastic strand is available (or the elastic strand loses its elastic behavior), and the window is located at the center of the outer sheet (transversely). The hot melt adhesive is applied spirally across this intermittent inelastic window area at a rate of 5 g / m. 2 The base weight is applied.

[0156] A 10gsm nonwoven material (spunbond-meltblown-spunbond, i.e., SMS) was used for the inner sheet, which was cut into rectangles 405mm wide and 126mm long. The inner sheet was spirally formed above the second and third series of elastic strands, with a density of 5g / m. 2 A base-weight hot melt adhesive is attached to the outer sheet to completely encapsulate the second and third series elastic strands between the inner and outer sheets. This assembly is then attached to the remaining fabric (a combination of the front elastic band and the absorbent body), wherein the bottom sheet of the absorbent body (the surface facing the garment) is applied in a spiral manner at approximately 5 g / m². 2 The base weight of the hot melt adhesive is applied and bonded at the transverse center, and the end edge (50) of the absorbent body (the end edge of the "original" back elastic strip originally attached to the article) is aligned with the first elastic strand from the second series of elastic strands. The first series of elastic strands with the encapsulation assembly is then folded toward the top sheet of the absorbent body and secured with double-sided tape at approximately 25 g / m². 2 A hot-melt adhesive was applied to attach the elastic strand to the top sheet and barrier leg clamps to create a pocket size of 30 mm longitudinally and 185 mm laterally. Finally, the original front elastic band and the new rear elastic band were attached to each other using a heat-bonded mechanical bond to create left and right seams. Absorbent sample samples were compacted in a flexible bag for one week at a stacking height of 78 mm (i.e., the total thickness of 10 double-folded products). The bag was then opened, and the absorbent samples were removed and conditioned at 23°C + / - 2°C and 50% + / - 10% relative humidity (RH) for at least 24 hours prior to any testing.

[0157] Description of Example 2

[0158] Compared to Example 1, the WGEP elastic portion of the lumbar support has 50% lower tensile stress.

[0159] Carefully remove the back elastic band (the combination of inner and outer panels with elastic strands between them) of the Pampers BabyDry Pants (size 5) available in Germany during the first half of 2020 using an ice spray. Carefully hold the remaining fabric (the combination of front elastic band and absorbent body) aside. For each absorbent fabric, a new back elastic band with waist protection is made by attaching a series of elastic strands between the inner and outer panels using hot melt adhesive.

[0160] For the back elastic band, a 13gsm nonwoven material (spunbond-meltblown-spunbond, i.e., SMS) is used as the outer sheet, which is cut into rectangles 405mm in the transverse direction and 240mm in the longitudinal direction. Hot melt adhesive is applied in a spiral at 5g / m², starting 50mm from the inner edge of the sheet and spanning the entire transverse and 40mm longitudinal directions. 2 The basis weight is applied to the outer nonwoven material. Four 470-point extra-elastic strands (the first set of elastic strands) are used at 190% elongation and bonded to a spiral hot-melt adhesive over a 40mm length and width. These four 470-point extra-elastic strands are part of the waist protection elastic section and have different spacing between the elastic components. The first two elastic components are 3mm apart from each other, the third elastic component is 7mm apart from the second elastic component, and the fourth elastic component is 7mm apart from the third elastic component. The outer sheet with a 50mm longitudinal dimension is folded longitudinally next to the innermost elastic strand (i.e., the elastic strand furthest from the edge of the sheet) to completely enclose the four elastic strands.

[0161] Starting 20mm away from the fourth 940-point special elastic component (first group of elastic components), it spans the entire transverse and longitudinal directions by 35mm in a spiral pattern at 5g / m. 2 The base weight is applied with a second series of hot melt adhesive, with four additional 470-point extra-elastic strands used at 190% elongation and bonded to the spiral hot melt adhesive throughout the transverse direction. Compared to the first set of 470-point extra-elastic strands, all four elastic strands are spaced 10 mm apart and located on the inner longitudinal side.

[0162] Starting 15mm away from the fourth 470-point elastic component (second group of elastic components), it spans 70mm across the entire transverse and longitudinal direction in a spiral pattern at 5g / m. 2The base weight of the third series of hot melt adhesive is applied, using ten 470-point extra-elastic strands at 240% elongation and bonded to the spiral hot melt adhesive along the entire transverse direction. These ten elastic strands are bonded in five pairs of two elastic strands. For the first four pairs of elastic strands, each elastic strand is spaced 3 mm from the other elastic strand in that pair, and the first four pairs of elastic strands have a 15 mm spacing between these pairs. The fifth pair of elastic strands has a 10 mm spacing between the elastic strands and a 10 mm spacing from the fourth pair of elastic strands, and is located longitudinally inside relative to the second series of 470-point extra-elastic strands. These five pairs of elastic strands are cut transversely to create a 100 mm wide intermittent window, in which no elastic strand is available (or the elastic strand loses its elastic behavior), and the window is located at the center of the outer sheet (transversely). The hot melt adhesive is applied spirally across this intermittent inelastic window area at a rate of 5 g / m. 2 The base weight is applied.

[0163] A 10gsm nonwoven material (spunbond-meltblown-spunbond, i.e., SMS) was used for the inner sheet, which was cut into rectangles 405mm wide and 126mm long. The inner sheet was spirally formed above the second and third series of elastic strands, with a density of 5g / m. 2 A base-weight hot melt adhesive is attached to the outer sheet to completely encapsulate the second and third series elastic strands between the inner and outer sheets. This assembly is then attached to the remaining fabric (a combination of the front elastic band and the absorbent body), wherein the bottom sheet of the absorbent body (the surface facing the garment) is applied in a spiral manner at approximately 5 g / m². 2 The base weight of the hot melt adhesive is applied and bonded at the transverse center, and the end edge (50) of the absorbent body (the end edge of the "original" back elastic strip originally attached to the article) is aligned with the first elastic strand from the second series of elastic strands. The first series of elastic strands with the encapsulation assembly is then folded toward the top sheet of the absorbent body and secured with double-sided tape at approximately 25 g / m². 2 A hot-melt adhesive was applied to attach the elastic strand to the top sheet and barrier leg clamps to create a pocket size of 30 mm longitudinally and 185 mm laterally. Finally, the original front elastic band and the new rear elastic band were attached to each other using a heat-bonded mechanical bond to create left and right seams. Absorbent sample samples were compacted in a flexible bag for one week at a stacking height of 78 mm (i.e., the total thickness of 10 double-folded products). The bag was then opened, and the absorbent samples were removed and conditioned at 23°C + / - 2°C and 50% + / - 10% relative humidity (RH) for at least 24 hours prior to any testing.

[0164] Description of Example 3

[0165] Compared to Example 1, the pocket is 80% smaller.

[0166] Carefully remove the back elastic band (the combination of inner and outer panels with elastic strands between them) of the Pampers BabyDry Pants (size 5) available in Germany during the first half of 2020 using an ice spray. Carefully hold the remaining fabric (the combination of front elastic band and absorbent body) aside. For each absorbent fabric, a new back elastic band with waist protection is made by attaching a series of elastic strands between the inner and outer panels using hot melt adhesive.

[0167] For the back elastic band, a 13gsm nonwoven material (spunbond-meltblown-spunbond, i.e., SMS) is used as the outer sheet, which is cut into rectangles 405mm in the transverse direction and 240mm in the longitudinal direction. Hot melt adhesive is applied in a spiral at 5g / m², starting 50mm from the inner edge of the sheet and spanning the entire transverse and 40mm longitudinal directions. 2 The basis weight is applied to the outer nonwoven material. Four 940-point extra-elastic strands (the first set of elastic strands) are used at 210% elongation and bonded to a spiral hot-melt adhesive over a 40mm length and width. These four 940-point extra-elastic strands are part of the waist protection elastic section and have different spacing between the elastic components. The first two elastic components are 3mm apart, the third elastic component is 7mm apart from the second elastic component, and the fourth elastic component is 7mm apart from the third elastic component. The outer sheet with a 50mm longitudinal dimension is folded longitudinally next to the innermost elastic strand (i.e., the elastic strand furthest from the edge of the sheet) to completely enclose the four elastic strands.

[0168] Starting 20mm away from the fourth 940-point special elastic component (first group of elastic components), it spans the entire transverse and longitudinal directions by 35mm in a spiral pattern at 5g / m. 2 The base weight is applied with a second series of hot melt adhesive, with four additional 470-point extra-elastic strands used at 190% elongation and bonded to the spiral hot melt adhesive throughout the transverse direction. Compared to the first set of 940-point extra-elastic strands, all four elastic strands are spaced 10 mm apart and located on the inner longitudinal side.

[0169] Starting 15mm away from the fourth 470-point elastic component (second group of elastic components), it spans 70mm across the entire transverse and longitudinal direction in a spiral pattern at 5g / m. 2The base weight of the third series of hot melt adhesive is applied, using ten 470-point extra-elastic strands at 240% elongation and bonded to the spiral hot melt adhesive along the entire transverse direction. These ten elastic strands are bonded in five pairs of two elastic strands. For the first four pairs of elastic strands, each elastic strand is spaced 3 mm from the other elastic strand in that pair, and the first four pairs of elastic strands have a 15 mm spacing between these pairs. The fifth pair of elastic strands has a 10 mm spacing between the elastic strands and a 10 mm spacing from the fourth pair of elastic strands, and is located longitudinally inside relative to the second series of 470-point extra-elastic strands. These five pairs of elastic strands are cut transversely to create a 100 mm wide intermittent window, in which no elastic strand is available (or the elastic strand loses its elastic behavior), and the window is located at the center of the outer sheet (transversely). The hot melt adhesive is applied spirally across this intermittent inelastic window area at a rate of 5 g / m. 2 The base weight is applied.

[0170] A 10gsm nonwoven material (spunbond-meltblown-spunbond, i.e., SMS) was used for the inner sheet, which was cut into rectangles 405mm wide and 126mm long. The inner sheet was spirally formed above the second and third series of elastic strands, with a density of 5g / m. 2 A base-weight hot melt adhesive is attached to the outer sheet to completely encapsulate the second and third series elastic strands between the inner and outer sheets. This assembly is then attached to the remaining fabric (a combination of the front elastic band and the absorbent body), wherein the bottom sheet of the absorbent body (the surface facing the garment) is applied in a spiral manner at approximately 5 g / m². 2 The base weight of the hot melt adhesive is applied and bonded at the transverse center, and the end edge (50) of the absorbent body (the end edge of the "original" back elastic strip originally attached to the article) is aligned with the first elastic strand from the second series of elastic strands. The first series of elastic strands with the encapsulation assembly is then folded toward the top sheet of the absorbent body and secured with double-sided tape at approximately 25 g / m². 2 The elastic strand was attached to the top sheet and barrier leg clamps using a hot-melt adhesive applied to the base weight to create a pocket size of 10 mm longitudinally and 70 mm laterally. Finally, the original front elastic band and the new rear elastic band were attached to each other using a heat-bonded mechanical bond to create left and right seams. The absorbent product sample was compacted in the flexible bag for one week at a stacking height of 78 mm (i.e., the total thickness of 10 double-folded products). The bag was then opened, and the absorbent product was removed and conditioned at 23°C + / - 2°C and 50% + / - 10% relative humidity (RH) for at least 24 hours prior to any testing.

[0171]

[0172] 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”.

[0173] Unless expressly excluded or otherwise limited, every reference cited herein, including any cross-references or related patents or applications, is incorporated herein by reference in its entirety. Reference to any reference is not an endorsement of its existence 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.

[0174] 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 longitudinal and transverse dimensions, the absorbent article comprising a front elastic band, a rear elastic band, a crotch area, a waist opening, and a pair of leg openings; the crotch area extending longitudinally between the front elastic band and the rear elastic band; The absorbent article includes an absorbent body that extends along the entire longitudinal dimension of the crotch area and further extends partially into each of the front elastic band and the rear elastic band, the absorbent body including a liquid-permeable top sheet, a liquid-impermeable bottom sheet, and an absorbent material area sandwiched therebetween. The entire length of the transverse edge of the front elastic band is stitched to a certain length of the transverse edge of the rear elastic band to define a pair of side seams with a seam length LS. The rear elastic band is divided into multiple zones that span the lateral direction and are defined by a percentage of the position of the rear elastic band from the distal edge to the proximal edge relative to the seam length LS, wherein the distal edge is considered 0% and the proximal edge is considered 100%, wherein the waist guard is configured such that it extends from the closed baseline toward the open edge toward the crotch area, wherein the waist guard is partially bonded to the rear elastic band to define a pocket, wherein the full pocket is positioned within 5% to 60% of the LS; wherein the pocket has a lateral dimension defined as the longest distance along a lateral centerline parallel to the article of the pocket extending from the left edge of the pocket to the right edge of the pocket, and wherein the lateral dimension of the pocket is 40% to 96% of the lateral dimension of the laterally extending edge of the backing sheet positioned in the rear waist area; The waist protection component includes a waist protection elastic portion in the area defining the pocket, wherein the area of ​​the rear elastic band overlapping the waist protection elastic portion is defined as the associated portion, wherein the tensile stress of the waist protection elastic portion is different from the tensile stress of the associated portion. The waist protection elastic portion is elasticated by multiple elastic strands extending laterally parallel to the absorbent article. The multiple elastic strands of the waist protection elastic portion are spaced apart from the edge of the opening at a distance not exceeding 12 mm; and The distance between the two elastic strands closest to the edge of the opening in the waist guard is less than the distance between any other adjacent elastic strands in the elastic portion of the waist guard; and The absorbent article described therein has a waist force greater than 5.6N.

2. The absorbent article according to claim 1, wherein the waist protection elastic portion has a tensile stress of 20 N / m to 70 N / m.

3. The absorbent article according to claim 1 or 2, wherein the plurality of elastic strands of the waist protection elastic portion are spaced apart from the edge of the opening at a distance not greater than 10 mm.

4. The absorbent article according to claim 3, wherein the plurality of elastic strands of the waist protection elastic portion are spaced apart from the edge of the opening at a distance not greater than 5 mm.

5. The absorbent article according to claim 1 or 2, wherein the longitudinal dimension of the pocket, defined as the longest distance between the closure baseline and the opening edge, is 10 mm to 50 mm.

6. The absorbent article according to claim 1 or 2, wherein the lateral dimension of the pocket is 40 mm to 120 mm.

7. The absorbent article according to claim 1 or 2, wherein the pocket has a lateral dimension defined as the longest distance from the left edge of the pocket to the right edge of the pocket along a lateral centerline parallel to the article, and wherein the lateral dimension of the pocket is 50% to 95% of the lateral dimension of the lateral extension edge of the substrate disposed in the back waist area.

8. The absorbent article according to claim 7, wherein the lateral dimension of the pocket is 60% to 95% of the lateral dimension of the lateral extension edge of the substrate disposed in the back waist area.

9. The absorbent article according to claim 1 or 2, wherein the absorbent body comprises a pair of leg clamps disposed along two transverse edges extending in the longitudinal direction, wherein the leg clamps are dynamically elastic at the opening edge.

10. The absorbent article according to claim 1 or 2, wherein the waist force does not exceed 9N.

11. The absorbent article of claim 1 or 2, wherein the waist guard is partially bonded to the rear elastic band to define the pocket, such that... - The adhesive portion of the waist guard overlaps the backing sheet by at least 5 mm along each of the left and right edges of the pocket, thereby defining the left and right edges of the pocket; and - The adhesive portion of the waist protector overlaps the backing sheet by at least 5 mm along the closure baseline of the pocket, thereby defining the closure baseline of the pocket.

12. The absorbent article according to claim 1 or 2, wherein the waist guard is formed by an extension of the rear elastic band, wherein the extension is folded inward such that the fold line forms the distal edge of the rear elastic band.

13. The absorbent article according to claim 1 or 2, wherein the anterior elastic band region is divided into four zones, the four zones spanning in the transverse direction and defined by the percentage of the position of the anterior elastic band region from the distal edge to the proximal edge relative to the seam length LS, wherein the distal edge is considered to be 0% and the proximal edge is considered to be 100%, wherein 0%-25% is the anterior waist region, 25%-50% is the distal abdominal region, 50%-85% is the proximal abdominal region, and 85%-100% is the leg region, wherein the anterior proximal abdominal region has the highest tensile stress compared to the other zones in the anterior elastic band.

14. The absorbent article according to claim 1 or 2, wherein the rear elastic band is divided into three zones, wherein: 0% to the distal edge of the waist protector is the lower back zone, the distal edge to the proximal edge of the waist protector is the protection zone, and the proximal edge to 100% of the waist protector is the hip zone, wherein the tensile stress of the protection zone is higher than that of the lower back zone or the hip zone.

15. The absorbent article according to claim 1 or 2, wherein the absorbent article has a dry weight of less than 50 g.

16. The absorbent article according to claim 1 or 2, wherein the absorbent body comprises a pair of barrier leg clamps, Each barrier leg cuff is formed of a material piece bonded to the absorbent body, such that the barrier leg cuff extends upward from the wearer-facing surface of the absorbent body when the absorbent article is worn. The barrier leg cuff includes proximal edges and free end edges directly or indirectly joined to the top and / or bottom pieces. The blocking leg cuff extends at least partially between the front lateral extension edge and the rear lateral extension edge (50) of the absorbent body, along and adjacent to each of the two side edges (48) of the absorbent body, and is disposed in the crotch area, extending into the front waist area and the rear waist area. Each of the aforementioned barrier leg clamps includes one or more strands near or located at the edge of the free end.

17. The absorbent article of claim 16, wherein the absorbent body comprises a pair of leg cuffs, and wherein the blocking leg cuffs are positioned laterally inside the leg elastic member (64).

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