The strip portion used in two-part absorbent articles

Abstract

Disclosed is a strap portion for wearing on a wearer's torso to form a trouser absorbent article together with a crotch portion. The strap portion has a longitudinal direction and a transverse direction and is elastic in the transverse direction. The strap portion includes a strap fastening member detachable from the crotch portion and a pair of side seams having a seam length LS. The strap portion is formed by a front strap and a back strap, each of which is divided into multiple zones that span in the transverse direction and are defined by the percentage of their position 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%. The strap portion includes a fastening zone that matches the position of the strap fastening member, wherein the tensile stress of the fastening zone is not higher than the tensile stress of the remaining zones.

Description

Technical Field

[0001] This invention relates to a strap portion for a two-part absorbent article. When the strap portion is assembled with a crotch portion, this provides a trouser-style absorbent article. The crotch portion can be replaced after becoming soiled, thus allowing the strap portion to be used for more than one application. Background Technology

[0002] Absorbent products for personal hygiene, such as disposable adhesive diapers, disposable pants, and adult incontinence underwear, are designed to absorb and contain various bodily fluids, including urine, menstrual blood, and feces. There is a need for absorbent products with replaceable absorbents so that they can be reused after the first soiling. This can be achieved by providing a crotch section that can be attached to a belt, which can be removed after the first soiling and replaced with another crotch section. This type of absorbent material with multiple absorbents allows for the removal of soiled absorbents without completely removing clothing, providing convenience. This convenience may be particularly needed during vacations or in colder seasons. Absorbent products with replaceable crotch sections also save material.

[0003] Absorbent articles with replaceable crotch portions are known in the art, such as those described in Japanese Patent Publications 2023-94947A-94954A and 2023-94956A-94958A. Although such absorbent articles are known, they may require improvement in practical use.

[0004] For example, absorbent articles known in the art may not have considered providing the aesthetics and feel of underwear. For example, absorbent articles known in the art may lack measures to guide where the strap portion and crotch portion attach to each other, thus failing to enable the resulting trousers to have basic functions such as containment, leak prevention, or wearing comfort.

[0005] Based on the foregoing, there is a need for an absorbent article with two parts that provides an aesthetic and tactile feel similar to underwear. There is also a need for an absorbent article that provides basic functions such as containment, leak prevention, and wearing comfort. Summary of the Invention

[0006] This invention relates to a strap portion for wearing on the wearer's torso to form a trouser absorbent article together with a crotch portion. The strap portion has a longitudinal direction and a transverse direction and is elastic in the transverse direction. The strap portion includes a strap fastening member detachable from the crotch portion and a pair of side seams having a seam length LS. The strap portion is formed by a front strap and a back strap, each of which is divided into multiple zones that span in the transverse direction and are defined by the percentage of their position 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%. The strap portion includes a fastening zone that matches the position of the strap fastening member, wherein the tensile stress of the fastening zone is not higher than the tensile stress of the remaining zones. Attached Figure Description

[0007] 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:

[0008] Figures 1A to 1D This is a schematic perspective view of an embodiment of the two-part absorbent article of the present invention, showing how the belt portion and the crotch portion are attached to each other to form a trouser-type absorbent article.

[0009] Figure 2A This is a schematic plan view of an embodiment of the front strap of the present invention with any seams removed and in a flat, unshrinked state, showing the surface facing the wearer.

[0010] Figure 2B This is a schematic plan view of an embodiment of the back strap of the present invention with any seams removed and in a flat, unshrinked state, showing the surface facing the wearer.

[0011] Figures 3A to 3B yes Figures 2A to 2B A schematic longitudinal sectional view taken along lines AA and BB when the section is formed as a strip.

[0012] Figure 4 This is a schematic plan view of an embodiment of the crotch portion of the present invention in a flat, unshrinked state, showing the surface facing the wearer.

[0013] Figure 5 It is intercepted along line CC. Figure 4 A schematic cross-sectional view of the transverse direction.

[0014] Figure 6 This is a schematic plan view of an embodiment of the strap portion and crotch portion of the present invention formed as a trouser-type absorbent article, wherein the side seams are removed and the article is shown facing the garment.

[0015] Figure 7 This is a schematic diagram of an example of a hanging sample fixture based on the "Full Product Force Measurement" section of this article.

[0016] Figures 8A to 8C This is a schematic diagram of an example of the equipment used for measuring bending force according to the article "Bending Force Measurement".

[0017] Figure 9A This is a schematic diagram illustrating how the "notched angle" in this article is measured.

[0018] Figure 9B This is a schematic diagram illustrating how the dimensions of the crotch fastener in this article are measured.

[0019] definition

[0020] As used herein, the following terms shall have the meanings specified below:

[0021] "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.

[0022] "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."

[0023] "Longitudinal" refers to the direction that extends substantially vertically from the waist edge of the garment to the opposite waist edge and is roughly parallel to the maximum linear dimension of the trouser-type absorbent garment when the belt and crotch sections are attached to each other.

[0024] "Horizontal" refers to a direction perpendicular to the longitudinal direction.

[0025] "Proximal" and "distal" refer to the positions closer to or farther from the longitudinal center of the trouser absorbent fabric when the belt and crotch sections are attached to each other.

[0026] "Wear-facing" and "clothing-facing" refer to the relative positions of elements, element surfaces, or groups of elements in a pant-type absorbent article when the belt section and crotch section are attached to each other. "Wear-facing" means that an element or surface is closer to the wearer than some other elements or surfaces during wear. "Clothing-facing" means that an element or surface is further away from the wearer than some other elements or surfaces during wear (i.e., the element or surface is closer to the wearer's clothing, which may be worn over a disposable diaper product).

[0027] "Setting" refers to the positioning of a component in a specific location or position.

[0028] "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.

[0029] 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.

[0030] The terms “nonwoven fabric,” “nonwoven layer,” or “nonwoven fiber web” are used interchangeably to refer to engineered fiber assemblies that are primarily planar and have been given a design-level structural integrity through physical and / or chemical means, but do not include weaving, knitting, or papermaking (as defined in ISO 9092:2019). Oriented or randomly oriented fibers are bonded together by friction and / or cohesive and / or adhesive forces. These fibers may be of natural or synthetic origin and may be short fibers, continuous filaments, or in-situ formed fibers. Commercially available fibers have diameters ranging from less than about 0.001 mm to greater than about 0.2 mm and come in several different forms, such as short fibers (known as chemically woven short fibers or chopped fibers), continuous monofilaments (filaments or monofilaments), untwisted continuous filament bundles (tows), and twisted continuous filament bundles (yarns). Nonwoven fiber webs can be formed by a variety of methods, such as meltblown, spunbond, solution spinning, electrospinning, carding, and air-jet spinning. The basis weight of nonwoven fiber webs is usually expressed in grams per square meter (g / m²). 2 (or gsm) indicates.

[0031] "Water-permeable" and "water-impermeable" refer to the permeability of a material within the intended use range of a disposable diaper product. Specifically, the term "water-permeable" refers to a layer or layered structure having pores, openings, and / or interconnected void spaces that allow liquid water, urine, or synthetic urine to pass through the thickness of the layer or layered structure 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 the thickness of the layer or layered structure 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".

[0032] The term "hydrophilic" describes the surface of a substrate that can be wetted by an aqueous fluid (e.g., an aqueous body fluid) deposited on it. Hydrophilicity and wettability are typically defined based on the contact angle and permeability of the fluid, for example, through a nonwoven fabric. This is discussed in detail in the American Chemical Society publication, "Contact Angle, Wetability, and Adhesion" (copyright 1964), edited by Robert F. Gould. A substrate surface can be said to be wetted (i.e., hydrophilic) when the contact angle between the fluid and the surface is less than 90°, or when the fluid tends to spread spontaneously along the substrate surface (both conditions often coexist). Conversely, if the contact angle is greater than 90° and the fluid does not spread spontaneously along the fiber surface, the substrate is considered "hydrophobic."

[0033] "Extensibility" and "stretchability" mean that the width or length of a component in a relaxed state can be stretched or increased.

[0034] "Elastic" and "flexible" mean that a component includes at least a portion made of an elastic material.

[0035] 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).

[0036] 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 tensile circumference W1, which is measured according to the “Full Article Force Measurement” in this document and using a ruler or a small magnifying glass.

[0037] "Original image" refers to a visual representation that is visible to the naked eye, provided through printing or other means, and possesses color. Printing includes various methods and equipment well known to those skilled in the art, such as offset printing, screen printing, flexographic printing, and gravure inkjet printing.

[0038] 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 CIE L a b In the color system, white is defined as having an L value of at least 94. The value of a is equal to 0 ± 2. The sum of the values ​​of b is equal to 0 ± 2 Those colors are worth it. Detailed Implementation

[0039] Two-part absorbent products

[0040] Figures 1A to 1DThis is a perspective view of an embodiment of the two-part absorbent article of the present invention, which is made of a strap portion (40) and a crotch portion (38), which, when assembled together, form a trouser absorbent article (20). The strap portion (40) and the crotch portion (38) can be detached from each other by a hook-and-loop fastening system (33) and / or other fastening systems. Reference Figures 2A to 2B , Figure 4 and Figure 6 Each of the strap portion (40), the crotch portion (38), and the trouser-type absorbent article (20) formed by assembling the strap portion (40) and the crotch portion (38) has a longitudinal direction and a transverse direction. Each of the strap portion (40), the crotch portion (38), and the trouser-type absorbent article (20) has a longitudinal center line LX, which also serves as a longitudinal axis. Each of the strap portion (40) and the crotch portion (38) has a transverse center line TX, which also serves as a transverse axis. The two-part absorbent article of the present invention can be provided as a commodity or commercially available item in various forms associated with the two-part absorbent article, for example as a kit including the necessary parts for providing the trouser absorbent article, or one part including size information and a method of attachment to the other part so that the purchaser can match it with the corresponding commodity to form the trouser absorbent article.

[0041] refer to Figures 2A to 3B The band portion (40) is formed to conform to the torso circumference of the intended wearer to dynamically generate a fitting force and distribute the force dynamically generated during wear. The band portion (40) has a front band (84) and a back band (86), the band portion (40) is elastic in the transverse direction and includes a pair of side seams with a seam length LS, wherein the front band (84) and the back band (86) form an annular elastic portion. The front and back bands (84, 86) may be made elastic by an elastomer (e.g., an elastic membrane and elastic strands laminated between nonwoven substrates). In such embodiments, the front and back bands are typically bonded together to form left and right side seams (32). Side seam bonding may be provided by heat, heated air, ultrasonic energy, pressure, adhesives or combinations thereof. The front and back bands (84, 86) may be durable materials, as described in further detail below, which are made elastic by an elastomer laminated between fabrics or attached to the surface of a fabric, or by threads formed by weaving or knitting the fabric. Regardless of the materials used to form the front and rear bands (84, 86), the transverse edges that separate the front and rear regions of the band portions (84, 86) are considered side seams (32). When the band portions (40) are uniform in the circumferential direction, any two lines located on the farthest side in the transverse direction are considered side seams.

[0042] The longitudinal dimension of the strip (40) along its circumference may be uniform or may vary, as described in further detail below. Reference Figures 2A to 3B The rear strap (86) may have a larger maximum longitudinal dimension than the front strap (84). When the front strap (84) has a maximum longitudinal dimension LF and the rear strap (86) has a maximum longitudinal dimension LB, LB may be about 105% to about 130% of LF. Without being bound by theory, this dimensional difference between the front and rear straps (84, 86) allows for easy differentiation between front and rear and further provides a better fit for the hips. In such embodiments, the distal edges of the front and rear straps (84, 86) may mate with each other to form a waist opening, wherein the remaining dimension of the rear strap forms an auxiliary portion that serves as hip coverage. Still refer to Figures 2A to 2B The front strap (84) and the back strap (86) are each divided into multiple zones that span in the lateral direction and are defined by the percentage of their position from the distal edge (88) to the proximal edge (90) relative to the seam length LS, wherein the distal edge (88) is considered 0% and the proximal edge (90) is considered 100%. The front strap (84) and the back strap (86) each include a strap fastening member (33B) facing the garment side, which forms part of the fastening system (33) that can engage with the crotch fastening member (33C), wherein the position of the strap fastening member (33B) relative to the seam length LS is considered the fastening zone (103). When supplied as a product, the strap portion (40) may be in a folded and flat state, wherein the side seams (32) are positioned at the left and right ends. The strap portion (40) may then optionally be folded at one or more lines generally parallel to the longitudinal or lateral axis. Alternatively, the strip portion (40) may optionally be rolled up in the transverse direction to provide a near-cylindrical shape. The strip portion (40) in this state may then be stacked or grouped together in the thickness direction and packaged in a primary package consisting only of the strip portion (40).

[0043] The crotch area (38) is shaped to conform to the intended wearer's crotch to absorb and contain bodily fluids, while also generating a conforming force during wear. Reference Figure 4 and Figure 5The crotch portion (38) includes a water-permeable top sheet (24), a water-impermeable bottom sheet (25), an absorbent core (62) disposed between the top sheet (24) and the bottom sheet (25), and a crotch fastening member (33C) disposed on the wearer-facing side. After soiling, the crotch portion (38) can be removed and replaced with a new one, allowing the strap portion (40) to be used for more than one use. This replacement of the crotch portion (38) also allows for diaper changes without removing the entire absorbent material (20) from the wearer. When supplied as a product, the crotch portion (38) can be supplied in a folded state, achieved by folding the crotch portion (38) along a fold line (FL) parallel to the longitudinal axis LX. There may be only one fold line (FL) that matches the longitudinal axis LX, or there may be two fold lines that do not match the longitudinal axis LX but are parallel to it. By providing the crotch portion (38) in this folded state before attaching it to the strap portion (40), the crotch portion (38) can be effectively inserted between the wearer's legs and attached to the strap portion (40). The crotch portion (38) can then optionally be folded at one or more lines generally parallel to the transverse axis. Alternatively, the crotch portion (38) can then optionally be rolled up in the transverse direction to provide a near-cylindrical shape. The crotch portions (38) in this state can then be stacked or gathered together in the thickness direction and packaged in a primary package consisting only of the crotch portions (38).

[0044] refer to Figures 1A to 1D The absorbent trousers (20) can be assembled by the following steps:

[0045] 1) Put the strap part (40) on the wearer's torso;

[0046] 2) Insert the crotch portion (38) between the wearer's legs;

[0047] 3) Unfold the crotch portion (38) to expose the crotch fastening component (33C); and

[0048] 4) Attach the crotch fastening component (33C) to the belt fastening component (33B).

[0049] The strap portion (40) may include a strap mark (40W) for positioning the strap portion relative to the wearer in a desired position when the strap portion (40) is worn on the wearer's torso. The strap mark (40W) may be provided adjacent to the distal edge on the longitudinal axis for matching the wearer's navel. Alternatively or additionally, a plurality of strap marks (40W) may be provided adjacent to the distal edge of the side seam (32) for matching the wearer's iliac crest.

[0050] The strap portion (40) may also include a fastening strap mark, and the crotch portion (38) may include a fastening crotch mark, wherein the fastening strap mark and the fastening crotch mark are configured to facilitate attachment of the strap portion (40) and the crotch portion (38) to the intended location. A primary package consisting of a first plurality of strap portions (40) and another primary package consisting of a second plurality of crotch portions (38) may be packaged together in a secondary package to provide a kit product. In such kit products, the second plurality may be larger than the first plurality. Alternatively, a package consisting only of the strap portions (40) or the crotch portion (38) may be provided as a product, wherein the product includes size information and attachment methods to enable the purchaser to match it to the corresponding size of the strap portions (40) or the crotch portion (38) to form a trouser-type absorbent article (20). Alternatively, a kit product may consist of one or more strap portions (40) and one or more crotch portions (38) in the same primary package for use as, for example, a travel kit, a sample, a gift, or for other purposes.

[0051] The strap portion (40) and crotch portion (38) can be configured to provide a one-to-one match of the same size. Alternatively, variations of the crotch portion (38) that match the same strap portion (40) can be provided. For example, crotch portions (38) with different capacity can be provided for daytime and nighttime use. For example, strap portions (40) and crotch portions (38) of different sizes can be fitted to fit the wearer's unique body structure.

[0052] As described above, the crotch portion (38) can be provided in a folded state, wherein the folded state is achieved by folding the crotch portion (38) along a fold line (FL) parallel to the longitudinal axis LX. The folded state can be achieved by using a hook-and-loop fastening member provided on the crotch portion (38), or by other bonding methods such as ultrasonic energy, adhesives, thermal welding, pressure, or combinations thereof. Regardless of the bonding method, and regardless of the location of the member provided for providing the folded state, such measures for providing the folded state are considered foldable attachment members. According to the peel strength measurement method described herein, foldable attachment members can have a peel strength of about 0.3N to about 10N, or about 1N to about 5N.

[0053] With part

[0054] refer to Figures 2A to 2B The belt portion (40) of the present invention includes a front belt (84) and a rear belt (86) extending in the transverse direction between the side seams (32), thereby forming an annular elastic portion. Reference Figures 3A to 3BThe band portion (40) may be made of two or more layers of nonwoven substrate (92, 94), with an elastomer sandwiched between the nonwoven layers. The front and back bands (84, 86) may be made elastic by an elastomer (e.g., elastic strands (96) laminated between the nonwoven substrates). The elastomer may be a strip of elastic membrane or elastic strands (96) with a density of about 400 dtex to about 1200 dtex that are visible to the naked eye. The elastomer may be a low-dtex elastic strand that is not easily visible to the naked eye and thus provides an underwear appearance to the band portion (40), such as those elastic strands with a density of about 30 dtex to about 400 dtex, or about 30 dtex to about 300 dtex. When using low-dtex elastic strands, the elastic strands may be spaced at a pitch of about 0.25 mm to about 3 mm.

[0055] In the discussion below, both the front strip (84) and the back strip (86) can be represented as zones, where multiple zones span in the lateral direction and are defined by the percentage of their position from the distal edge (88) to the proximal edge (90) relative to the seam length LS, where the distal edge (88) is considered to be 0% and the proximal edge (90) is considered to be 100%.

[0056] refer to Figures 2A to 2B The tensile stress in the fastening zone (103) is not higher than the tensile stress in the remaining zones. The front and rear belts (84, 86) may each include an upper zone (101) located distal to the fastening zone (103) and a lower zone (105, not shown) located proximal to the fastening zone (103). When the front and rear belts (84, 86) have different longitudinal dimensions, the remainder of each of the front belt (84) and the rear belt (86) is considered the upper zone (101) and the lower zone (105). When the front and rear belts (84, 86) each include an upper zone (101) distal to the fastening zone and a lower zone (105) proximal to the fastening zone, the upper zone (101), the fastening zone (103), and the lower zone (105) may have substantially the same tensile stress. The term "essentially identical tensile stress" means that, among the two or three values ​​obtained, the deviation of any value from another value or the median value is within ±10%. The upper region (101) may have a higher tensile stress than the fastening region (103).

[0057] refer to Figures 2A to 6The belt fastening members (33B) on the front and rear belts (84, 86) may include loops, and the crotch fastening member (33C) may include hooks. The belt fastening member (33B) may be positioned at approximately 10% to approximately 100% of the LS, preferably at approximately 15% to approximately 100% of the LS. Furthermore, the belt fastening member (33B) may extend approximately 60% to approximately 100%, preferably approximately 70% to approximately 85% of the lateral dimension of the belt, wherein the percentage is measured with the belt portion (40) fully stretched. The area of ​​the belt fastening member (33B) may be at least the same as the area of ​​the crotch fastening member (33C). By making the area of ​​the belt fastening member (33B) equal to or greater than the area of ​​the crotch fastening member (33C), it is possible to easily attach the crotch fastening member (33C) to the belt fastening member (33B).

[0058] refer to Figures 2A to 2B As shown in Figure 9, the belt portion (40) of the present invention, comprising a front belt and a rear belt (84, 86), may include a concave belt notch (108) located on at least one of the front belt (84) or the rear belt (86), wherein the belt notch (108) is positioned on the longitudinal axis LX at a proximal edge (90). The belt notch (108) may have about 20% to about 40% of the longitudinal dimension of the respective belt and about 10% to about 30% of the transverse dimension of the respective belt. The longitudinal and transverse dimensions of the belt notch (108) are measured in the contracted state of the belt portion (40). Furthermore, the remainder of the band including the notch (108) is a lateral proximal edge (90S), wherein the lateral proximal edge (90S) is parallel to the distal edge (88), wherein, according to the notch angle measurement method of this invention, in the contracted state, the angle (α) between the lateral proximal edge (90S) and the notch (108) can be approximately 80 degrees to approximately 120 degrees, or approximately 90 degrees to approximately 120 degrees. According to the notch angle measurement method of this invention, in the extended state, the angle (α) between the lateral proximal edge and the notch (108) can also be approximately 80 degrees to approximately 120 degrees, or approximately 90 degrees to approximately 120 degrees. Without being bound by theory, by providing the notch (108) in this configuration, when formed together with the crotch portion (38), the band portion (40) is prevented from being soiled by bodily fluids, while also providing better coverage. Better coverage is achieved by maintaining an appropriate amount of force along the proximal edge (90) to prevent gaps from forming between the band portion (40) and the crotch portion (38). Furthermore, such a band notch (108) allows the crotch portion (38) to face the wearer's effusion point and vicinity, thus providing good absorbency and preventing leakage of the assembled absorbent article (20).

[0059] refer to Figures 3A to 3BThe front and rear straps (84, 86) may each include an anchoring area (104) comprising reinforcing material (40R) located at approximately 0% to approximately 70%, preferably approximately 0% to approximately 60%, of the seam length LS. At least a portion of the anchoring area (104) may overlap with a strap fastening member (33B). The reinforcing material (40R) may be located on the wearer-facing side or the clothing-facing side of the strap portion, preferably on the wearer-facing side. The reinforcing material (40R) may be a material that does not interfere with the lateral tensile strength of the strap portion (40), such as an additional laminate comprising nonwoven fabric and elastic strands, a stretchable membrane, or a stretchable nonwoven fabric. The front and rear straps (84, 86) may each include an abdominal area (106) located proximal to the anchoring area (104) and a waist area (102, not shown) located distal to the anchoring area (104). When the front and back straps (84, 86) have different longitudinal dimensions, the remainder of each of the front (84) and back (86) straps is considered the waist area (102) and the abdominal area (106). An anchoring area (104) may be configured to have a tensile stress at least 1.5 times, preferably about 2.2 times to about 10 times, that of the abdominal area (106). Anchoring area (104) may be configured to have a bending force at least 2 times, preferably about 2.2 times to about 5 times, that of the abdominal area (106). Anchoring area (104) may be configured to have a tensile stress at least 1.5 times, or about 1.6 times to about 4 times, that of the waist area (102). Anchoring area (104) may be configured to have a bending force at least 2 times, or about 2 times to about 5 times, that of the waist area (102). By providing an anchoring area (104) with higher tensile stress and / or higher bending force compared to the remaining areas, better fit can be provided for the assembled trouser absorbent article. The anchorage zones (104) of the front (84) and rear (86) belts can be arranged such that positions relative to 0% to 100% of the LS match between the front and rear belts (84, 86) for a good appearance. The belt fastening member (33B) may also not extend to the entire lateral dimension of the front or rear belt and be positioned away from the side seam to ensure a tight fit with the crotch portion. Tensile stress values ​​for each zone are measured according to the belt zone tensile stress measurements described herein. Bending force values ​​for each zone are measured according to the bending force measurements described herein.

[0060] The strip portion (40) may be made of durable materials, including woven or knitted textiles made of natural fibers such as cotton, flax, wool, bamboo, hemp, silk, rayon, etc., and any blends of these fibers with any other fiber or with synthetic fibers. Examples of synthetic fibers suitable as components of durable materials include polyester, nylon, spandex, and / or other elastomer fibers. Durable materials may also include: breathable and waterproof materials such as GORE-TEX (products of WL Gore & Associates, Inc., Elkton, MD); fabrics containing microencapsulated phase change polymer materials such as OUTLASTCOMFORTEMP fabrics (products of Outlast Technologies, Boulder, CO, as in U.S. Patent Nos. 6,514,362 and 6,207,738), COOLMAX (products of Invista, Wichita, KS), etc. Suitable durable materials can be formed in any woven or knitted fabric form, including bird's-eye fabric, terry cloth, fleece, flannel, knitted fabric, stretch knitted fabric, lambskin, suede, superfine fleece, satin, velvet, Burley knitted fabric, etc. Suitable examples include POLARTECHPOWER DRY, POWER STRETCH, and WIND PRO (products of Polartec, LLC, Lawrence, MA). Knitted textiles can impart good fit, comfort, and / or appearance to the belt portion (40). Fibers incorporating spandex or other elastomers can also enhance stretch and elasticity compared to textiles that do not contain such elastic fibers, thereby imparting good fit, comfort, and / or appearance to the belt portion (40). Specific suitable examples of durable materials include plain knitted fabrics of blends of the following fibers: rayon (93%) and spandex (7%); modal (94%) and spandex (6%); cotton and spandex; and bamboo and spandex. In this embodiment, the belt and crotch fastening components (33B, 33C) may be buttons and buttonholes, zippers, metal or plastic hooks and links, and other garment fastening components.

[0061] crotch area

[0062] refer to Figure 4 The crotch portion (38) to be assembled with the belt portion (40) includes a front region (26), a central region (30), and a rear region (28), each extending one-third of the longitudinal dimension of the crotch portion. (See reference) Figure 5 The crotch portion (38) includes a water-permeable top sheet (24), a water-impermeable bottom sheet (25), and an absorbent core (62) disposed between the top sheet (24) and the bottom sheet (25). The crotch portion (38) may also include an outer cover layer (42).

[0063] A water-permeable topsheet (24) is positioned to at least partially contact or be in close proximity to the wearer. Suitable topsheets (24) can be made from a wide range of materials, such as porous foam; mesh foam; open-cell plastic film; or woven or nonwoven fiber webs composed of natural fibers (e.g., wood or cotton), synthetic fibers (e.g., polyester or polypropylene), or a combination of natural and synthetic fibers. Topsheets (24) are generally soft, gentle to the touch, and non-irritating to the wearer's skin. Topsheets (24) are liquid-permeable, allowing bodily fluids to easily permeate through the thickness of the topsheet (24). Exemplary topsheets (24) suitable for use herein include those purchased from Xiamen Yanjan New Material Co. Ltd., made of a carded nonwoven substrate comprising PE / PET bicomponent fibers, and marketed under the trade name H30501221 from Fibertex NiLai, Malaysia, or under the trade name SB1206169 from FQN Hazlet NJ. As is known in the art, any portion of the topsheet (24) may be coated with a lotion or skincare composition. Examples of suitable lotions include those described in U.S. Patents 5,607,760; 5,609,587; 5,635,191; and 5,643,588.

[0064] A water-impermeable backsheet (25) is designed to prevent runoff absorbed by and contained within the absorbent core (62) from soiling items that may come into contact with the diaper garment (20), such as sheets and underwear. The backsheet (25) may be positioned such that it extends beyond the absorbent core (62) positioned on the wearer-facing side of the particular backsheet (25) in both the longitudinal and transverse directions. Suitable backsheet (25) materials include membranes, such as those manufactured by Plaster Argentina under the trade name PLBANBBS 10-12GSM PR V1. Other suitable backsheet (25) materials may include breathable materials that allow vapors to escape from the diaper garment (20) while still preventing runoff from passing through the backsheet (25). Exemplary breathable materials may include materials such as woven fiber webs, nonwoven fiber webs, composite materials such as membrane-coated nonwoven fiber webs, and microporous membranes, such as those manufactured by Daika Japan under the trade name MPF DKH-180 15G V7 and by Berry Nashville, TN under the trade name BR-137P V13. Such breathable composite materials are described in more detail in PCT application WO 95 / 16746 and U.S. Patent No. 5,865,823. Other breathable substrates, including nonwoven fiber webs and open-cell shaped membranes, are described in U.S. Patent No. 5,571,096. Exemplary suitable substrates are disclosed in U.S. Patent No. 6,107,537. Other suitable materials and / or manufacturing techniques may be used to provide suitable substrates, including but not limited to surface treatments, specific membrane selection and processing, specific filament selection and processing, etc.

[0065] The crotch portion (38) includes an absorbent core (62) disposed on the wearer-facing side for absorbing and containing bodily excretions. The absorbent core (62) may include an absorbent layer and a collection system. The absorbent layer is the area in which an absorbent material with high retention capacity, such as a superabsorbent polymer, is present. The absorbent layer may be substantially cellulose-free. Alternatively, the absorbent layer may contain cellulose. There may be an absorbent layer primarily containing cellulose, and another absorbent layer primarily containing a superabsorbent polymer.

[0066] The superabsorbent polymer of the absorbent layer can be disposed between a first material layer and a second material layer fixed by a fiber layer of thermoplastic adhesive material. The first and second material layers can be nonwoven fiber webs, including synthetic fibers such as single-component fibers of PE, PET and PP, and multi-component fibers such as side-by-side, core / skin or island-of-the-sea fibers. Such synthetic fibers can be formed by spunbonding or meltblowing. Some portions of the absorbent layer can be configured to be substantially free of absorbent material to form one or more channels. The channels can be used to allow the absorbent core (62) to bend when swollen by the fluid, so that the central region (30) conforms to the wearer's body after swelling and prevents the diaper product (20) from sagging. Multiple absorbent layers can be disposed in the absorbent core (62).

[0067] Alternatively, the absorbent core 62 may comprise a high-loft material containing a superabsorbent polymer. The term "high-loft" refers to a low-density, loosely woven fabric compared to a flat, paper-like fabric. High-loft fiber webs are characterized by a relatively high porosity. This means that a relatively high amount of void space exists within which superabsorbent polymer particles can be distributed. The high-loft material (without superabsorbent particles) can have a porosity of less than 0.20 g / cm³ at a pressure of 4.14 kPa (0.6 psi). 3 The density, especially at 0.05 g / cm³ 3 Up to 0.15 g / cm 3 Density within the specified range. A high-loose layer (without superabsorbent particles) can have a density below 0.20 g / cm³ at a pressure of 2.07 kPa (0.3 psi). 3 Especially at 0.02 g / cm 3 Up to 0.15 g / cm 3 Density within the specified range. A high-loose layer (without superabsorbent particles) can have a density below 0.15 g / cm³ at a pressure of 0.83 kPa (0.12 psi). 3 Especially 0.01g / cm 3 Up to 0.15 g / cm 3 Densities within the range of 15 gsm to 500 gsm, preferably 30 gsm to 200 gsm, such as those described in US 2021 / 0361497 A1. The absorbent core (62), comprising a highly bulky material covering the superabsorbent polymer, may also contain channels.

[0068] The absorbent core (62) may also include a collection system for facilitating the collection and distribution of bodily fluids and may be positioned between the top sheet (24) and the absorbent layer. The collection system functions to rapidly collect fluid from the top sheet (24) away from the wearer-facing side and / or distribute it over a larger area, allowing for more efficient absorption by the absorbent core. The collection system may contain cellulose fibers. Channels may also be formed in the collection system and may be configured to at least partially match the channels of the absorbent layer in the thickness direction. Another liquid management layer of this type may also be positioned between the bottom sheet (25) and the absorbent layer. The liquid management layer may be a spunlace nonwoven fabric comprising viscose, PET, CoPET / PET fibers, and combinations thereof.

[0069] refer to Figure 4 The crotch portion (38) includes crotch fastening components (33C) in the front region (26) and the rear region (28). Each crotch fastening component (33C) may include a continuous transverse element (TE) extending in the transverse direction adjacent to the longitudinal end of the crotch portion (38) and a longitudinal element (LE) extending in the longitudinal direction adjacent to the transverse edge of the crotch portion (38). The advantage of placing the crotch fastening component (33C) in this region is that it provides a good finished appearance and effectively prevents leakage between the belt portion (40) and the crotch portion (38). The longitudinal element (LE) of the crotch fastening component (33C) may be continuous with the transverse element (TE) to ensure a good fastening. The longitudinal element (TE) may be positioned away from the longitudinal edge of the crotch portion (38), and the transverse element (TE) may be positioned away from the transverse edge of the crotch portion (38) to save material. The overall profile of the crotch portion (38) may be rectangular or may be irregular. The front region (26) can be tapered, such that the longitudinal edge of the front region has the smallest lateral dimension within the front region (26). Therefore, the front end of the crotch portion (38) can be made convex. This overall profile shape allows the front crotch portion (38) to be smoothly and securely attached to the front strap portion (40), and further provides a continuous fit during wear.

[0070] refer to Figure 4 and Figure 6 The belt fastening members (33B) on the front and rear straps (84, 86) may include loops, and the crotch fastening member (33C) may include hooks. The area of ​​the crotch fastening member (33C) is disposed on the wearer-facing side of the crotch portion and may also be used as a foldable attachment member. The area of ​​the crotch fastening member (33C) may not be larger than the area of ​​the belt fastening member (33B). The crotch fastening member (33C) may be configured not to overlap with the absorbent core (62).

[0071] refer to Figure 9BThe hook fastening member on the crotch portion (332C) may have a larger dimension (d1) and a smaller dimension (d2) along the curvature of the front end of the crotch portion (38). The larger dimension (d1) of the hook fastening member is measured along the centerline of the fastening member. When present at the longitudinal axis LX, the smaller dimension (d2) of the hook fastening member is taken at the longitudinal axis LX. When not present at the longitudinal axis LX, the smaller dimension (d2) is measured perpendicular to d1, where the smaller dimension is at its maximum dimension. The crotch portion (38) may include an inner bag (38WG) along at least one of the front or rear end, wherein the inner bag (38WG) is formed by a bag base (100) which is hydrophobic and includes a concave bag notch (38N) in the transverse center, wherein the bag base (100) is disposed along the front edge and / or rear edge of the crotch portion (38) and partially bonded to the remainder of the crotch portion by an adhesive area (100B) to form an inner bag (38WG) opening toward the longitudinal center of the crotch portion. This bonding between the bag base (100) and the remainder of the crotch portion can be provided by ultrasonic energy. The opening of the inner bag (38WG) toward the longitudinal center forms a proximal profile (100C), which includes the shape of a concave bag notch (38N) in the transverse center. The bag base (100) may be positioned along the front or rear end of the crotch portion (38) to provide a base for bonding, for example, discrete material of a hook-and-loop fastening system bonded to the wearer-facing side of the bag base (38). The area of ​​the crotch fastening member (33C) may match or not match the area of ​​the bag base. The crotch fastening member (33C) may be positioned only along the front and rear longitudinal edges. The inner bag (38WG) may not contain any elastic material.

[0072] refer to Figure 4 and Figure 5The crotch portion (38) may include a pair of inner hoops (68) disposed along two transverse edges extending in the longitudinal direction and overlapping the top sheet (24). The inner hoops (68) may be made of a material with high fluid impermeability to prevent leakage of bodily fluids. Each inner hoop (68) extends from the bottom sheet (25) toward the longitudinal axis to form a free edge (68F). ​​The inner hoop (68) may be made by providing an elastic member (68E) attached to the portion comprising the hoop material with high fluid impermeability, and then bonding the hoop material along the left and right edges of the bottom sheet (25), wherein a longitudinally extending bonding line (BL) defines the base of the inner hoop. The elastic member (68E) may be disposed adjacent to the free edge (68F) to provide elasticity to the inner hoop (68), for example at a distance of about 0.5 mm to about 3 mm from the free edge (68F). ​​The elastic member (68E) may be disposed as a plurality of strands spaced at intervals of about 1 mm to about 2 mm. Each inner band (68) of the present invention includes a movable portion (68U) that is not attached to the top plate (24) and extends from the front region (26) through the crotch region (30) to the rear region (28). This allows the longitudinally extending inner band elastic member (68E) to be in a movable elastic state, so that the inner band (68) remains close to the wearer to provide a barrier effect. The elastic strand (68E) closest to the free edge (68F) may have the same or lower tensile stress as the remaining elastic strands. The elastic strands (68E) facing the front and rear ends may fail. Figure 4 In the figure, only the inner elastic strand (68E) in a state of active elasticity is depicted.

[0073] The inner hoop (68) and bag base (100) forming the inner bag (38WG) can remain unbonded. The movable portion (68U) of the inner hoop elastic member can overlap with the proximal profile (100C) of the inner bag. Without being bound by theory, by providing the movable portion (68U) and proximal profile (100C) of the inner hoop elastic member in this relationship, even when the inner bag (38WG) is not elastic, the inner bag (38WG) can be opened in its front and / or rear regions due to the force provided by the inner hoop elastic member (68E). Furthermore, by providing the unbonded inner hoop (68) and bag base (100) forming the inner bag (38WG), this maintains flexibility in this region.

[0074] refer to Figure 4 The bag base (100) can extend proximally, allowing the inner bag (38WG) to overlap with the absorbent core for improved containment. Reference Figure 6The belt portion (40) may also be provided with a notch (108). This notch (108) may be provided on the belt portion (40) intended to be attached to a crotch fastening member (33C) having an inner pocket (38WG). The combination of the notch (108) and the pocket notch (38N) of the inner pocket (38WG) allows the crotch pocket base to have space to lift from the top piece (24), thus providing good accommodation. When the belt portion (40) and the crotch portion (38) are assembled in the intended position, any portion of the inner pocket of the crotch portion may be configured to exist on the distal side of the concave notch of the front or rear belt. In other words, when assembled in the intended position, the proximal profile (100C) does not extend into the notch (108).

[0075] refer to Figure 5 The crotch portion (38) may also include an outer cover (42) disposed on the garment-facing side of the backing (25) to give the assembled absorbent article (20) a finished appearance. The outer cover (42) may be made of a soft nonwoven material. Exemplary outer covers (42) suitable for this document include those of trade name S31921A made of a spunbond nonwoven substrate containing PP fibers purchased from Guanhe Hygiene Products Co., Ltd; trade name A10160EJ–MALAYSIA purchased from Fibertex NiLai Malaysia; and trade name SM1104174 purchased from FQN Hazlet NJ.

[0076] Peel strength measurement

[0077] 1. Preparation of finished product samples

[0078] The samples used for the measurements below were taken from three finished product sections.

[0079] To measure the crotch portion (38), use the crotch portion (38) in its folded state as is, wherein there is a hook or adhesive part inside the folded crotch portion (38). To obtain a test sample, identify the longitudinal direction of the crotch portion (38) and stretch the crotch portion (38) in the longitudinal direction such that any longitudinally extending elastomer (such as a hoop elastic member) is fully stretched, and then attach the crotch portion (38) to a suitable plate having at least one area of ​​the fully stretched article via any attachment means (such as tape, adhesive, hook, etc.). Identify the front and / or rear sides attached by the folded attachment part. Cut with scissors in the transverse direction 10 cm from the longitudinal edge of the side with the folded attachment part. The portion exposed by such a cut is the measuring edge. Remove the obtained portion from the attachment plate while keeping the folded attachment part in place.

[0080] To measure the belt section (40), use the belt section (40) with hooks in its folded state as is. (The belt section excluding the folded attachment is not subject to this test.) To obtain a test sample, cut the belt section (40) along the side seam (32) to obtain the front and rear belts. Cold spray can be used, but care should be taken not to create wrinkles in the belt section (40) or to spray onto any elastic members. If the folded attachment is present only on the front or rear belt, the corresponding belt section should be tested. If the folded attachment is present on both the front and rear belts, both sections should be tested. Measure 10 mm laterally from the end of the folded attachment toward the side seam, and then cut longitudinally with scissors. The section with the folded attachment exposed by such a cut is the measurement edge.

[0081] 2. MTS Test Setup and Measurement

[0082] An MTS Criterion Model 42 running TW Elite 4.3.1.375 software, equipped with a standard tensiometer or equivalent, was used as the instrument. All tests were performed indoors at 23°C ± 2°C and 50% ± 5% relative humidity.

[0083] The initial distance between the upper and lower clamps was set to 10 mm. The sample was positioned with its surface parallel to the ground, and the upper and lower clamps each clamped one side of the sample along their respective lateral edges. A constant elongation rate of 200 mm / min was applied. Elongation measurements were taken from the point where the program began. The upper clamp began to move upwards while the lower clamp remained stationary, thus unfolding the folding attachment. The program stopped until the upper clamp had moved 120 mm. The machine continuously measured the force (N) at a sampling rate of 50 Hz.

[0084] Peak force is the maximum force value observed during the measurement process. Measurement results from 3 samples were obtained and averaged with an accuracy of 0.01 N.

[0085] Full-product force measurement

[0086] Forces were measured on absorbent articles (20) with sections (40) or assembly using TestWorks 4 software (purchased from MTS SYSTEMS (CHINA) CO., LTD) and an electronic tension tester or equivalent instrument with a computer interface such as the MTS Criterion C42. A load cell was selected such that the force result of the tested sample would fall between 10% and 90% of the capacity of the load cell used. The instrument was calibrated according to the manufacturer's instructions. All tests were performed indoors at 23°C ± 2°C and 50% ± 5% relative humidity.

[0087] 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 sample slippage during testing. The outer diameter of the horizontal bar segment (including the rubber coating) is 10.0 mm. The central axis of the horizontal bar segment (302) is configured to remain parallel and in the same vertical plane throughout the testing process. The gauge length perimeter is determined by the following formula:

[0088] Gauge length perimeter = 2 × (H + D + D / 2)

[0089] Where H is the vertical gap between the horizontal bar segments (302), and D is the outer diameter of the bar.

[0090] The instrument is set up by following these steps:

[0091]

[0092] Insert the sample of the absorbent article (20) with section (40) or assembly onto the upper horizontal bar segment (302) so that the bar passes through the waist opening and one leg opening of the article. 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 article. Adjust the article so that the longitudinal centerline LX of the article 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 article in place by hand as needed until the force is between 0.05N and 0.1N, while being careful not to add any unnecessary force. The gauge length circumference at this point is the initial gauge length circumference. Start the test and move the chuck upward at 254mm / min until a force of 19.6N is obtained, then the chuck immediately returns to the initial gauge length circumference at the same speed. Record the maximum circumference at 19.6 N and the force at 70% of the maximum circumference during the loading and unloading phases of the test.

[0093] 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.

[0094] Belt tensile stress measurement

[0095] This measurement is only provided for the strip portion (40) including the anchorage zone (104), which comprises reinforcing material (40R). 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 (available 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 performed 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 test sample.

[0096] To obtain the test sample, the sample band portion (40) is cut along the side seam (32) to obtain the front and rear bands. Cold spraying can be used, but care should be taken not to create wrinkles in the band portion (40). Care should be taken not to spray onto any elastic member (96). According to the invention, the obtained elastic band sample is cut into the anchoring area, waist area, and belly area (104, 102, 106), taking care not to cut any elastic member (96). Before testing, the sample is preconditioned for two hours at 23°C ± 2°C and 50% ± 5% relative humidity.

[0097] 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 a separate identical product 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.

[0098]

[0099] 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.

[0100] For each zone, five band sections were analyzed and the unloading forces were recorded. The average tensile force (N) was calculated for each zone to be as close as 0.01 N. The tensile stress in each zone was calculated and reported by dividing the average tension (N) by the average sample width (m), accurate to 0.1 N / m.

[0101] Bending force measurement

[0102] This measurement is provided only for the strip portion (40) including the anchorage zone (104), which comprises reinforcing material (40R). As the equipment, a TA (Texture Analyzer) or equivalent instrument from TAXT plus Stable Microsystems is used. The texture analyzer is equipped with a 3-point bending blade and a bending bridge, such as... Figure 8A and Figure 8B As shown. Reference Figure 8A The curved blade has a dimension W of 70mm and a dimension T of 3mm. (Reference) Figure 8B The dimension G is 10mm. Calibrate the instrument according to the manufacturer's instructions. All tests were performed indoors at 23℃±2℃ and 50%±5% relative humidity.

[0103] In order to obtain test samples, the strip portion (40) was cut into sections in the same manner as the above-described method for measuring tensile stress in the strip area.

[0104] The initial instrument settings are shown in the table below. Draw a center line along the length of the sample. Reference Figure 8C Place the prepared sample between the bending blade and the bridge, ensuring the top bending blade is aligned with the centerline. Set the chuck stroke to compress the sample article until the stroke reaches the target distance of 13 mm, then return to the initial position. Analyze five samples. Calculate and report the peak bending load, accurate to 0.01 N.

[0105]

[0106] Angle measurement of concave notch

[0107] This measurement is used to obtain the angle between the lateral proximal edge (90S) and the concave notch (108) of the band portion (40) in the contracted and extended states.

[0108] To obtain a test sample in a contracted state, cut the strip portion sample (40) along the side seam to obtain a front and / or rear strip (84, 86) including a concave notch (108). Cold spray can be used, but care should be taken not to create wrinkles in the strip portion (40). Avoid spraying on any elastic components of the strip. Lay the obtained strip sample flat on the hook plate under natural contraction conditions without stretching, and allow any wrinkles to unfold. Adhesive tape can be used to hold the strip sample under these conditions.

[0109] To obtain a test sample in an extended state, the strip portion (40) is first subjected to full-work force measurement to obtain the full tensile circumference (mm). Then, the strip portion sample is cut along the side seam to obtain the front and / or rear strips (84, 86) including concave notches (108). Cold spraying can be used, but care should be taken not to create wrinkles in the strip portion. Care should be taken not to spray onto any elastic components of the strip. The obtained strip sample is stretched to 0.5 times the full tensile circumference and then laid flat on the hook plate.

[0110] Draw a line (line 1) between the proximal edges of the sample and the side seam, then identify the starting position (90S) of the concave notch from the proximal edge. (Reference) Figure 9A Draw a line (line 2) at the starting position that matches the direction of the concave surface. If the concave notch curves around the starting position of line 2, draw the tangent to the curve at the starting position. Measure the angle (α) between line 1 and line 2. Measure five samples and calculate and report their average values ​​separately, accurate to 1°.

[0111] Example

[0112] Example 1 is as follows Figures 2A to 2B The strip shown (40) and as shown Figure 4 The crotch portion (38) shown is made by the following combination. The crotch portion (38) is provided in a folded state along the longitudinal axis using a crotch fastening member. The belt portion (40) and the crotch portion (38) can be assembled into a trouser absorbent article by means of the fastening belt and the crotch fastening member.

[0113] The materials used in Example 1 are provided in Table 1. The dimensions and angles of Example 1 are provided in Table 2. The peel force, tension, and bending force of certain elements of Example 1 are provided in Table 3.

[0114] Table 1

[0115]

[0116] Table 2

[0117]

[0118] Table 3

[0119]

[0120] The strap portion (40) can be easily put on by the wearer, and the crotch portion (38) in the folded state can be easily unfolded. The strap portion (40) and crotch portion (38) of each embodiment of the absorbent trousers assembled according to the method of the invention provide the basic functions of the absorbent trousers, such as good capacity, leak-proofness and wearing comfort.

[0121] 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 the range surrounding its functional equivalent. For example, a dimension disclosed as “40 mm” is intended to represent “approximately 40 mm”.

[0122] Unless expressly excluded or otherwise limited, every reference cited herein, including any cross-references or related patents or patent applications, and any patent application or patent claiming priority to or benefiting from it, is incorporated herein by reference in its entirety. Reference to any reference is not an endorsement of it as prior art to any disclosed or protected art herein, nor is it an endorsement of any such invention, either on its own or in combination with any one or more references. Furthermore, where any meaning or definition of a term in this invention conflicts with any meaning or definition of the same term in referenced documents, the meaning or definition given to that term in this invention shall prevail.

[0123] 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. A strap portion for wearing on the wearer's torso to form a trouser absorbent article together with a crotch portion, the strap portion having a longitudinal direction and a transverse direction and being elastic in the transverse direction, the strap portion including a strap fastening member detachable from the crotch portion and a pair of side seams having a seam length LS. The belt portion is formed by a front belt and a rear belt, each of which is divided into multiple zones that span in the lateral direction and are defined by the percentage of their position 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 the belt portion includes a fastening zone that matches the position of the belt fastening member, wherein the tensile stress of the fastening zone is not higher than the tensile stress of the remaining zones.

2. The belt portion according to claim 1, wherein the front belt and the rear belt each include an upper region distal to the fastening region, wherein the fastening region has a lower tensile stress than the upper region.

3. The strip portion according to any one of the preceding claims, wherein the strip portion is made elastic by elastic strands having a density of about 30 dtex to about 400 dtex extending in the transverse direction.

4. The strip portion according to any one of the preceding claims, wherein the strip portion further comprises: An anchoring zone comprising reinforcing material located on the wearer-facing side of the band portion, the reinforcing material being positioned at approximately 0% to approximately 70%, preferably approximately 0% to approximately 60%, of the seam length LS, wherein the band fastening member overlaps with the anchoring zone; and An abdominal region, located near the anchorage region, wherein the anchorage region has a tensile stress of at least about 1.5 times, preferably about 2.2 times to about 10 times, the tensile stress of the abdominal region.

5. The band portion according to claim 4, wherein the anchoring zone has a bending force of at least twice that of the abdominal zone.

6. The strip portion according to claim 4 or 5, wherein the reinforcing material is an additional laminate comprising nonwoven fabric and elastic strands.

7. The belt portion according to any one of claims 4 to 6, wherein the position of the anchoring zone relative to the joint length LS is the same on the front belt and the rear belt.

8. The belt portion according to any one of the preceding claims, wherein the belt fastening member is disposed at a position of about 10% to about 100% of the LS, preferably at a position of about 15% to about 100% of the LS.

9. The belt portion according to any one of the preceding claims, wherein the belt fastening member is a plurality of loops of a hook and loop system.

Images