Absorbent article with staggered flaps

Abstract

The utility model discloses an absorption product with staggered fins. The absorption product is at least provided with a top sheet layer, an inrush flow layer, an absorption core body and a bottom sheet layer. The absorbent article also has a first flap and a second flap wherein in a state where the first flap and the second flap overlap under the crotch panel, the first outer edge curve of the first flap and the first outer edge curve of the second flap form a partial complementation in areas opposite each other, and both the first flap and the second flap do not overlap.

Description

Technical Field

[0001] This utility model relates to the field of disposable hygiene products, and more particularly to an absorbent article with winglets, wherein the winglets are alternately arranged on the crotch piece of underwear and conform to the shape of the crotch piece of underwear. Background Technology

[0002] Feminine absorbent products, such as sanitary napkins, are often used to collect and retain bodily fluids containing, for example, menstrual flow and / or blood. Comfort, absorbency, and fit are three key product attributes and areas of concern for the wearer. In particular, wearers are often interested in learning about such products because they absorb large amounts of menstrual blood with minimal leakage, preventing stains on their underwear, outerwear, or sheets, and helping them avoid the subsequent embarrassment of such stains.

[0003] Known absorbent products of this type are typically long and narrow, mainly consisting of a sanitary napkin body with an absorbent pad, used to absorb menstrual blood flowing from the vagina during a woman's menstrual period. The menstrual blood flows through a top sheet layer, a flow layer, and a composite core made of fluff pulp or a mixture of fluff pulp and superabsorbent material, arranged sequentially from top to bottom (or from inside to outside), and is ultimately absorbed and retained within the composite core.

[0004] To provide safe and reliable protection for female wearers, wings are typically provided on both sides of the absorbent material, laterally across the body. These wings can fold downwards, partially abutting against the inner surface of the wearer's thighs and fitting snugly to the crotch area of ​​underwear. Such wings help prevent the leakage of vaginal secretions, thus avoiding staining clothing and unnecessary embarrassment, see, for example, US Patent Publication US2787271A.

[0005] However, because women's underwear typically has a waist-shaped crotch area, and the wings in existing US patents are directly connected to the sides of the elongated absorbent material, insufficient fit occurs during the application of the wings to the crotch area. In response, European patent EP511905B1 discloses various wing configurations, including butterfly and wing-shaped designs with multiple wing angles, aiming to secure absorbent materials with these wings to women's underwear by increasing the longitudinal length of the wings and the contact area. However, excessively long wings and too many contact areas can lead to twisting and potential leakage during use. Furthermore, this wing design fails to consider the flexible fit with the curve of the underwear crotch area, and the excessive contact area can cause discomfort to the wearer's skin. Moreover, this large-area wing design also increases raw material consumption and raises the unit cost of the absorbent material.

[0006] In response, while Canadian patent CA2415060A1 discloses an interlaced wing structure, it designs small interlaced wings on a larger wing body to accommodate the narrow and elongated crotch area, specifically for T-type and G-type underwear. Furthermore, the transverse axis of each wing body extends transversely to the main body of the absorbent material, or perpendicularly to the axis of the main longitudinal portion of the product. This also creates wrinkles in the crotch area of ​​the underwear, leading to discomfort and reducing the fit and stability of the garment.

[0007] Therefore, there is a need in the prior art to improve the wing design to better fit the crotch curve of women's underwear, thereby achieving better fixation and leak-proof effect. Utility Model Content

[0008] Therefore, the objective of this invention is to overcome the deficiencies in the prior art and provide an absorbent article with staggered winglets, which at least comprises a top layer, a flow layer, an absorbent core, and a bottom layer, and further comprises: winglets, which have a first winglet disposed on the right lateral edge of the main body of the absorbent article and a second winglet disposed on the left lateral edge of the main body of the absorbent article, and the first winglet and the second winglet extend opposite to each other from the main body of the absorbent article in the lateral direction respectively; wherein, the first winglet and the second winglet respectively have an inner edge curve of the first winglet and a second winglet on the inner edge adjacent to the crotch piece of the women's underwear. The inner edge curves of the first and second wings are generally conforming to the crotch curve of the women's underwear crotch piece; the outer edges of the first and second wings, which are far from the inner edge of the women's underwear crotch piece, have generally the same outer edge curve; the first and second wings each have a maximum lateral length that can generally cover the width of the women's underwear crotch piece; wherein, when the first and second wings are superimposed on the underwear crotch piece, the first outer edge curve of the first wing and the second outer edge curve of the second wing form partial complementarity in the areas opposite to each other, and the first and second wings do not overlap.

[0009] In a non-limiting embodiment of the present invention, the area of ​​the region surrounded by the first wing is constructed as the integral of the boundary region surrounded by the first outer edge curve and the inner edge curve of the first wing; the area of ​​the region surrounded by the second wing is constructed as the integral of the boundary region surrounded by the second outer edge curve and the inner edge curve of the second wing; wherein the area of ​​the region surrounded by the second wing is substantially equal to the area of ​​the region surrounded by the first wing.

[0010] In a non-limiting embodiment of the present invention, the adhesive pattern layer of the first wing is configured such that the area defined by the outer edge curve and the inner edge curve of the first adhesive strip group is the integral of the boundary region surrounded by the outer edge curve and the inner edge curve of the first adhesive strip group; wherein the first outer edge curve is recessed generally toward the center of the first wing to form the outer edge curve of the first adhesive strip group; the inner edge curve of the first wing is recessed generally toward the center of the first wing to form the inner edge curve of the first adhesive strip group; and the adhesive pattern layer of the second wing is configured such that the boundary region surrounded by the outer edge curve and the inner edge curve of the second adhesive strip group is formed; wherein the second outer edge curve is recessed generally toward the center of the second wing to form the outer edge curve of the second adhesive strip group; the inner edge curve of the second wing is recessed generally toward the center of the second wing to form the inner edge curve of the second adhesive strip group.

[0011] In a non-limiting embodiment of the present invention, alternatively, the adhesive pattern layer of the first wing and the second wing is configured as adhesive strips respectively disposed on each wing segment.

[0012] In a non-limiting embodiment of the present invention, in the first wing backing pattern layer, the first outer edge curve is recessed approximately toward the center of the first wing by a distance of 3 to 5 millimeters; this recessed distance is approximately equal to the distance the inner edge curve of the first wing is recessed approximately toward the center of the first wing.

[0013] In a non-limiting embodiment of the present invention, the second wing has a backing pattern layer area that is substantially the same as that of the first wing; wherein the area of ​​the backing pattern layer of the first wing is at most 50% of the area of ​​the first wing.

[0014] In a non-limiting embodiment of the present invention, the adhesive pattern layer of the first wing or the adhesive pattern layer of the second wing includes at least one adhesive strip arranged sequentially in the transverse direction (X) or the longitudinal direction (Y).

[0015] In a non-limiting embodiment of the present invention, up to three adhesive-backed regions can be constructed within the first or second wing, wherein each adhesive-backed region is spaced 1 to 3 millimeters apart from each other along the longitudinal direction Y.

[0016] In a non-limiting embodiment of the present invention, when the first wing and the second wing are overlapped to the crotch piece of the underwear, the distance between the first outer edge curve of the first wing and the second outer edge curve of the second wing is between 1 mm and 3 mm.

[0017] In a non-limiting embodiment of the present invention, the longitudinal length of both the first wing and the second wing is approximately between 3 cm and 10 cm; and the lateral length of both the first wing and the second wing is approximately between 3 cm and 8 cm.

[0018] Therefore, this utility model utilizes its preferred wing shape to adapt to the fit between the protective wing and the crotch curve of women's underwear, thereby achieving better fixation and leak-proof performance. Its technical features and advantages will be further described below through specific embodiments. Attached Figure Description

[0019] Figure 1 An exploded view of an embodiment of an absorbent article in the prior art is shown in lines, which specifically illustrates the construction of the absorbent article.

[0020] Figure 2 Shown by lines Figure 1 A top view of the absorbent component of the absorbent article shown;

[0021] Figure 3 Shown by lines Figure 2 A top view of a partial area of ​​the absorption component shown;

[0022] Figure 4 The diagram shows the front panel structure of a typical women's briefs using lines.

[0023] Figure 5 Shown by lines Figure 4 The diagram shows the back panel structure of a typical women's briefs, with a detailed illustration of the crotch area's structural curves.

[0024] Figure 6 A top view of an absorbent article according to a non-limiting embodiment of the present invention in the deployed wing configuration is shown in lines, specifically illustrating the staggered arrangement of the crotch winglets and their outline configuration.

[0025] Figure 7 Shown by lines Figure 6 The absorbent material shown is a top view of the folded wing section, which specifically shows the adhesive application arrangement for the crotch flap and its outline configuration.

[0026] Figure 8 A top view of the absorbent article in the deployed wing configuration according to another non-limiting embodiment of the present invention is shown in lines, specifically illustrating the staggered arrangement of the crotch flaps and their outline configuration.

[0027] Figure 9 Shown by lines Figure 8 The absorbent article shown is a top view of the folded wing section, which shows the adhesive application arrangement for the crotch flap and the adhesive strip arrangement curve.

[0028] Reference numerals used repeatedly in this specification and drawings are intended to indicate the same or similar elements of this utility model.

[0029] Figure Labels

[0030] 100 - Absorbent article; 100A - Central region; 100B - End region;

[0031] 101A, 101B - Side fins; 102 - Top fin layer; 103 - Flow deflector layer;

[0032] 103A, 103B - End edges; 103C, 103D - Side edges;

[0033] 104A, 104B - End edges; 104C, 104D - Side edges;

[0034] 104 - Absorbent core; 105 - Film layer;

[0035] L - Longitudinal axis; T - Lateral axis; X - Lateral direction; Y - Longitudinal direction; Z - Depth direction;

[0036] 210 - Front panel of underwear

[0037] F B1 - Front panel first width F B2 - Front panel second width F B3 - Third width of the front panel

[0038] F ARC1 -First arc height of the front piece F ARC1 - Front panel second arc height F L1 - Front piece length

[0039] 220 - Back panel of underwear

[0040] U1 - First part of the back panel; U2 - Second part of the back panel, crotch piece

[0041] U L1 -Length of the first part of the back piece U L2 -Length of the second part of the back piece

[0042] U B1 - Rear panel first width U B2 -Second width of the rear piece U B3 - Third width of the back piece

[0043] U B4 -Back piece fourth width a-Back piece fourth width, vertical height in the underwear back piece coordinate system

[0044] U ARC1 - Rear section first arc height U ARC2 -Second arc height U of the rear piece ARC3 - Rear third arc height R U -Relative radius of the second part of the rear piece

[0045] X1 - Axis coordinate of the back panel of the underwear; Y1 - Vertical coordinate of the back panel of the underwear.

[0046] h 0 - Second part of the rear piece, horizontal axis dimension k 0 -Vertical coordinate dimension of the second part of the back piece

[0047] f 0(y) - Crotch curve

[0048] 300-First absorbent product; 310-First wing; 310'-Second wing

[0049] 320 - First adhesive strip group; 321 - First adhesive strip; S1 - First winglet adhesive backing area

[0050] f 1(y) -Inner edge curve of the first wing f 1 ’(y) -Inner edge curve of the second wing

[0051] w - Vertical spacing between the first and second winglets

[0052] S-First Wing Region

[0053] f 2(y) -First outer edge curve b1-Width of the integral rectangle of the first winglet

[0054] f 2 ’(y) -Second outer edge curve

[0055] x 1 -First winglet first lateral boundary y 1 -First longitudinal boundary of the first wing

[0056] x 2 -First winglet second lateral boundary y 2 -First winglet second longitudinal boundary

[0057] f 3(y) -Inner edge curve of the first adhesive strip group f 4(y) -Outer edge curve of the first adhesive strip group r 1 -Inner edge curve indentation of the first adhesive strip group r2 - The outer edge curve of the first adhesive strip group is recessed.

[0058] b 2 - Width of the integral rectangle of the first adhesive group

[0059] 400-Second absorbent material; 410-First wing; 410'-Second wing

[0060] 420 - Second Adhesive Strip Set f 5(y) -Inner edge curve of the first wing f 6(y) -First outer edge curve b 3 - Width of the integral rectangle of the second adhesive group f 6 ’(y)- Second outer edge curve

[0061] f 5 ’(y)- The inner edge curve of the second wing

[0062] f 7(y) - Inner edge curve of the first adhesive strip group f 8(y) - Outer edge curve of the first adhesive strip group

[0063] f 4 ’ (y) , f 8 ’ (y) - The outer edge curve of the second adhesive strip group

[0064] f 3 ’ (y),f 7 ’ (y) - Inner edge curve of the second adhesive strip group Detailed Implementation

[0065] Those skilled in the art will understand that the following detailed description of embodiments is merely an illustration of exemplary models and is not intended to limit the broader aspects of this disclosure.

[0066] Terminology Definition

[0067] As used herein, the term "absorbent article" refers to an article that can be placed close to or near the wearer's body (i.e., adjacent to the body) to absorb and contain various liquid, solid, and semi-solid excretions from the body. As described herein, such absorbent articles are intended to be discarded after a limited period of use, rather than washed or otherwise restored for reuse. It should be understood that, without departing from the scope of this invention, the absorbent articles for women include, but are not limited to, menstrual pads, sanitary napkins, feminine pads, panty liners, absorbent panty products, and incontinence products.

[0068] As used herein, the terms "bonded" or "jointed" refer to the joining, adhesion, connection, attachment, etc., of two components. When they are joined, adhered, connected, attached, etc., directly or indirectly to each other, such as when bonded to an intermediate component, the two components are considered bonded together. Bonding can be achieved, for example, by adhesives, pressure bonding, thermal bonding, ultrasonic bonding, splicing, stitching, and / or welding.

[0069] As used herein, the term "bonded combed web" refers to a web made of short fibers that are fed through a combing or carding unit that separates or breaks the fibers and aligns them in the machine direction to form a fiber nonwoven web that is generally oriented in the machine direction. This material can be bonded together by methods including point bonding, air-penetration bonding, ultrasonic bonding, adhesive bonding, etc.

[0070] As used herein, the terms “superabsorbent polymer,” “superabsorbent,” or “SAP” are to be used interchangeably and should refer to polymers that can absorb and retain a very large amount of liquid relative to their own mass. Superabsorbent polymers are classified as crosslinkable hydrogels that absorb aqueous solutions through hydrogen bonds and other polar forces with water molecules. The ability of SAP to absorb water is based in part on its degree of ionization (a coefficient of ion concentration in aqueous solutions) and the functional polar groups of SAP that have hydrophilicity. SAP is typically produced by the polymerization of acrylic acid with sodium hydroxide in the presence of an initiator to form sodium polyacrylate (sometimes called sodium polyacrylate).

[0071] As used herein, the term "lateral" refers to a direction parallel to a horizontal line tangent to the front surface of the upper portion of the wearer's legs adjacent to the torso when the absorbent article is worn normally and the wearer is in a flat, square, normal standing position. The "width" dimension of any part or feature of an article, such as a women's absorbent article, is measured in the lateral direction. When an article or its parts are laid flat on a horizontal surface, the "lateral" direction corresponds to the lateral direction relative to the structure when it is worn, as defined above. For an article, such as a women's absorbent article opened and laid flat on a horizontal plane, "lateral" refers to a direction perpendicular to the longitudinal direction and parallel to the horizontal plane.

[0072] As used herein, the "lateral axis" of a feminine absorbent article or component thereof is a horizontal line located in the xy plane, and when the absorbent article or component thereof is laid flat on a horizontal surface, the horizontal line bisects the length of the absorbent article or component thereof. The lateral axis is perpendicular to the longitudinal axis.

[0073] As used herein, "longitudinal" refers to a direction perpendicular to the transverse direction. The "length" dimension of any part or feature of an article is measured along the longitudinal direction from its forward extent to its rearward extent. When an article, such as a women's absorbent article or its parts, is laid flat on a horizontal surface, the "longitudinal" direction is perpendicular to the transverse direction of the absorbent article when it is worn, as defined above.

[0074] As used herein, the term "fiber core" can include fibrous materials made from natural fibers (e.g., cotton, including 100% organic cotton), modified natural fibers, semi-synthetic fibers (e.g., fibers spun from regenerated cellulose), synthetic fibers (e.g., fibers spun from polymer resins), or combinations thereof. Synthetic fibers can include fibers spun from a single polymer or blends of polymers. Synthetic fibers can include monocomponent fibers, bicomponent fibers, or multicomponent fibers.

[0075] The longitudinal axis of a feminine absorbent article or its component is a longitudinal line located in the xy plane, and when the absorbent article is laid flat on a horizontal surface, the longitudinal line bisects the width of the absorbent article or its component. The longitudinal axis is perpendicular to the transverse axis.

[0076] Regarding absorbent articles such as absorbent articles for women or their components, when laid flat on a horizontal surface, the "xy plane" refers to any horizontal plane occupied by any layer of that horizontal surface or article or component.

[0077] Regarding absorbent articles (such as absorbent articles for women or their components), when laid flat on a horizontal surface, the "z direction" is the direction perpendicular to / orthogonal to the xy plane.

[0078] As used herein, the terms “top,” “bottom,” “upper,” “lower,” “above,” “below,” “under,” “upper adjacent,” “lower adjacent,” and similar terms relating to relative vertical positioning, when used herein to refer to a layer, component, or other feature of an absorbent article (such as a feminine absorbent article), are relative to the z-direction and will be interpreted relative to the absorbent article as it would appear when it is laid flat on a horizontal surface, wherein the wearer-facing surface of the absorbent article is oriented upward and the outward-facing surface is oriented downward.

[0079] As used herein, "body-facing" is a relative positional term that refers to a feature of a component or structure that is closer to the wearer than another feature during use. For example, the top sheet layer has a body-facing surface that is closer to the wearer than the opposite, outward-facing surface of the top sheet.

[0080] As used herein, "facing the garment" is a relative positional term that refers to a feature or structure that is further away from the wearer than another feature when in use. For example, a topsheet layer has a garment-facing surface that is further away from the wearer than the opposite, wearer-facing surface of the topsheet.

[0081] Absorbent products for women

[0082] See Figure 1-3 For example, the absorbent article 100 for female use can extend to a certain extent along the longitudinal direction (Y direction), the transverse direction (X direction), and the depth direction (Z direction). Here, the absorbent article 100 can have various geometric shapes, but generally has a pair of opposing longitudinal side edges and a pair of opposing transverse end edges. For example... Figure 1 As shown, the absorbent article 100 may have a liquid-permeable top sheet layer 102 facing the body and a liquid-impermeable bottom sheet layer 105 facing the clothing. An absorbent assembly may be positioned between the top sheet layer 102 and the liquid-impermeable bottom sheet layer 105. The absorbent assembly may include a flow layer 103 located below the top sheet layer 102, wherein the flow layer 103 has a first side facing the top sheet layer 102 and a second side facing away from the top sheet layer 102, and an absorbent core 104 positioned between the second side of the flow layer 103 and the bottom sheet layer 105, wherein a portion of the absorbent core 104 is positioned in a central region 100A of the absorbent article to receive liquid seeping down from the flow layer 103.

[0083] like Figure 1 As shown, both the top film layer 102 and the bottom film layer 105 can extend beyond the outermost peripheral edge of the absorber core 104, and the periphery can be completely bonded together using known bonding techniques for forming a sealed peripheral region. For example, the top film layer 102 and the bottom film layer 105 can be bonded together by adhesive bonding, ultrasonic bonding, or any other suitable bonding method known in the art.

[0084] further, Figure 1The absorbent article 100 may have a pair of side flaps 101A and 101B extending laterally from the absorbent article 100. The side flaps 101A and 101B may fold over the edge of the wearer's underwear, such that they are positioned between the edge of the wearer's underwear and their thigh. The side flaps 101A and 101B may serve at least two functions. First, the side flaps 101A and 101B may prevent the wearer's underwear from getting soiled by forming a barrier along the edge of the underwear. Second, the side flaps 101A and 101B may have attachment aids (not shown), such as clothing adhesive or hooks, to keep the absorbent article 10 securely and correctly positioned within the underwear. It should be understood that the side flaps 101A and 101B are optional, and in various embodiments, the absorbent article 10 may be constructed without the side flaps 101A and 101B.

[0085] Each of these components of the absorbent article 100 will be described in more detail below.

[0086] Top layer

[0087] The topsheet layer 102 defines a body-facing surface of the absorbent article 100 that is in direct contact with the wearer's body and is liquid-permeable to receive menstrual blood. Ideally, the topsheet layer 102 is configured for comfort and fit, and to guide menstrual blood away from the wearer's body and towards the absorbent components through its own structure. Ideally, the topsheet layer 102 retains virtually no liquid in its structure, providing a relatively comfortable and non-irritating surface on the wearer's skin in close proximity to the absorbent article 100. Optionally, the topsheet layer 102 may comprise a nonwoven material. It is known that the nonwoven fiber topsheet layer 102 can be produced by any known process for manufacturing nonwoven fiber webs, non-limiting examples of which include spunbond, carding, wet web forming, air-laid web forming, meltblown, needle punching, mechanical winding, thermo-mechanical winding, and hydroentangling.

[0088] Preferably, the top layer 102, as a nonwoven fabric, can be manufactured with a basis weight of approximately 8 gsm to 70 gsm. In practice, such a basis weight range can meet the requirements of the required tensile strength level of the fiber web for processing, as well as the substantial influence of consumer preferences for opacity levels and thickness, feel, and appearance.

[0089] Non-limiting examples of woven and nonwoven materials suitable for use as topsheet layers include fibrous materials made of natural fibers (e.g., cotton, including 100% organic cotton), modified natural fibers, semi-synthetic fibers (e.g., fibers spun from regenerated cellulose), synthetic fibers (e.g., fibers spun from polymer resins), or combinations thereof.

[0090] Preferably, in some examples, the top sheet layer 102 as a nonwoven fabric may comprise a mixture of hydrophobic and hydrophilic fibers, wherein the weight ratio of hydrophilic to hydrophobic fibers is 10:90 to 90:10, more preferably 35:65 to 65:35, and even more preferably 40:60 to 60:40.

[0091] Depending on their chemical composition, the surface of a fiber will inherently be either hydrophilic or hydrophobic. For example, the surface of fibers spun from or otherwise formed from some types of polymers, such as polyethylene and polypropylene, will inherently be hydrophobic. In contrast, the surface of other types of fibers, such as those spun from regenerated cellulose (e.g., viscose, lyocell, etc.), is inherently hydrophilic. The surface of natural fibers can also inherently be hydrophilic or hydrophobic, but this can depend on the processing the fibers have undergone. For example, harvested cotton fibers have a coating of natural oils and / or waxes, and therefore their surfaces are hydrophobic. However, after they have undergone processes including scrubbing and bleaching, the oils and / or waxes are removed, making the fiber surface hydrophilic.

[0092] As described above, the hydrophilicity of hydrophilic fibers can be influenced by applying a surface treatment composition, such that the hydrophilic fiber comprises a fiber core and a hydrophilic material layer covering the fiber core. The inventors believe that, when the majority of the fiber is hydrophilic, fluid collection rates can be improved by combining it with other features described herein without unduly affecting reabsorption in an unfavorable or unacceptably unfavorable manner. The opposite may be true when the goal is less reabsorption. In this case, a higher weight fraction of hydrophobic fibers may be desired. Similarly, hydrophobicity can also be influenced by applying a surface treatment composition, wherein the hydrophobic fiber comprises a fiber core and a hydrophobic material layer covering the fiber core. Here, a first side of the top sheet layer comprises hydrophobic fibers, and a second side of the top sheet layer comprises hydrophilic fibers.

[0093] Specifically, by utilizing the design of the top layer 102, which comprises a mixture of hydrophobic and hydrophilic fibers, the top layer 102 of the absorbent article 100 of this invention can achieve both "dryness" and "rapid absorption," two seemingly dissimilar characteristics. This is because, on the one hand, the first side (the side facing the body) of the top layer 102 is composed of hydrophobic fibers that have undergone a certain hydrophobic treatment, which reduces the interaction force between the first side of the top layer 102 and bodily fluids such as menstrual blood. This helps to increase the contact angle between them, making it less likely for menstrual blood and other bodily fluids to spread on the body-facing side of the top layer 102. As a result, this reduces the amount of bodily fluids on the body-facing side of the top layer 102 and the skin-contacting surface, thereby increasing the wearer's perceived dryness. On the other hand, the second side (the side facing the clothing) of the top layer 102 is composed of hydrophilic fibers that have undergone a certain hydrophilic treatment, allowing bodily fluids to quickly pass through the fiber gaps under their own weight and high polarity, and be discharged downwards by the second side (the side facing the clothing) of the top layer 102, thereby quickly guiding the liquid to the absorbent core 104 located below the top layer 102.

[0094] Flow layer

[0095] A non-limiting example of the configuration of the flow layer 103 is schematically depicted in Figure 2-3 As shown, the flow layer 103 may have opposing end edges 103A and 103B that extend substantially parallel to the transverse axis T, and side edges 103C and 103D that extend substantially parallel to the longitudinal axis L. Similarly, the absorber core 104 located below it may have opposing end edges 104A and 104B that extend substantially parallel to the transverse axis T, and side edges 104C and 104D that extend substantially parallel to the longitudinal axis L. Figure 3 As shown, each of the end edges 103A and 103B of the flow layer 103 may be disposed longitudinally outside the absorber core 104. However, this is not necessarily required. For example, end edges 103A and / or 103B may extend co-exist with the absorber core 104, or end edges 103A and / or 103B may be disposed longitudinally inside the end edges 104A and / or 104B of the absorber core 104. Similarly, side edges 103C and / or 103D may be disposed laterally outside the side edges 104C and / or 104D of the absorber core 104. Alternatively, side edges 103C and / or 103D may extend laterally co-exist with the side edges 104C and / or 104D of the absorber core 104.

[0096] In this invention, the aim is to provide the flow layer 103 with sufficient pores to allow for rapid collection of bodily fluids while keeping the fluids away from the top layer 102 to reduce the chance of backflow. The inventors have discovered that by combining and proportioning fibers of different thicknesses and deniers, and rationally controlling the gaps between the fibers in the flow layer, liquid can rapidly permeate to the absorbent core 104. Based on this, the flow layer 103 in this invention comprises a blend of first fibers with a first fineness and second fibers with a second fineness interwoven with each other, wherein gaps for liquid permeation are formed near the interlacing points of the first and second fibers. The flow layer has a first side facing the top layer and a second side facing away from the top layer, wherein the first fineness is less than the second fineness. Preferably, the first fineness of the first fiber is designed to be about 1 to 6 deniers and the second fineness of the second fiber is designed to be 4 to 15 deniers. Of course, those skilled in the art will understand that the flow layer can also be formed by interlacing fibers with substantially the same denier, wherein voids for liquid infiltration are formed near the interlacing points of these fibers. Such a flow layer also falls within the protection scope of this invention.

[0097] With this design, the sampling rate can be significantly increased by forming a pattern of voids that allow liquid to flow through the flow layer 103. Preferably, the voids in the flow layer 103 have an average area of ​​0.5 mm² to 2.5 mm², and these voids collectively constitute 6% to 25% of the total area of ​​the flow layer's opening area. It is believed that if the shape of the voids is too long or too narrow, the fluid sampling rate may be negatively affected. Therefore, it is desirable for the voids to have a finite maximum average aspect ratio in the XY direction (maximum size: minimum size in the XY direction). Thus, it is desirable for the average aspect ratio of the voids to be from about 2.5:1 to 1:2.5, and all combinations of sub-ranges within these ranges are envisioned herein.

[0098] A schematic depiction of a non-limiting example of a cross-section of the flow layer 103 along the Z direction, as envisioned herein, is provided. Figure 1 As shown, the flow layer 103 has a first side, which is the body-facing surface of the flow layer 103, and a second side opposite to it, which is the side facing the clothing and away from the top sheet layer 102.

[0099] Absorbing core

[0100] like Figure 1-2 As shown, in this example, the absorber core 104 is positioned between the second side of the flow layer 103 and the substrate layer 105. Figure 2As shown, at least a portion of the absorbent core 104 is positioned within the central region 100A of the absorbent article 100 to receive liquid permeated from the self-flowing layer 103 when the absorbent article 100 is correctly or appropriately placed in the wearer's underwear. The absorbent core 104 can have any suitable shape, including but not limited to elliptical, stadium-shaped, rectangular, asymmetrical, peanut-shaped, trapezoidal, rounded trapezoidal, oval, and hourglass shapes. The configuration and construction of the absorbent core 104 can vary (e.g., the absorbent core 104 can have different thickness zones, hydrophilic gradients, superabsorption gradients, or lower average density and lower average basis weight collection zones). Additionally, the size and absorbency of the absorbent core 104 can also vary to accommodate various wearers. However, the total absorbency of the absorbent core 104 should conform to the design load and intended use of the disposable absorbent article.

[0101] Preferably, the absorbent core of the absorbent article has a central protrusion that rises outward from the body side to a certain height, wherein the central protrusion is designed to be generally peanut-shaped with a first width, conforming to the vaginal opening. This first width is, for example, in the range of 3.5 cm to 4.5 cm, preferably 4 cm. The central protrusion may be made of pulp or a material mixed with superabsorbent polymers (SAP) to meet the needs of users with high discharge volumes. Due to the three-dimensional structure of the central protrusion, the amount of absorbent material used can be significantly increased to enhance absorbency. Preferably, the central protrusion can be perforated to improve the penetration of menstrual blood and allow the central protrusion to absorb menstrual blood from the body more quickly and in greater quantities.

[0102] Preferably, the absorbent article further includes a wrapping layer for enclosing the absorbent core 104. The wrapping layer may be formed of one or more nonwoven materials, paper, film, or other materials, or laminates thereof. In one form, the wrapping layer may be formed of only a single material, substrate, laminate, or other material that at least partially surrounds itself.

[0103] The absorbent core 104 may include one or more adhesives, for example, to help secure SAP or other absorbent materials within the first and second layer composites. Suitable absorbent cores comprising a relatively large amount of superabsorbent polymer (“SAP”, also known as “absorbent gelling material” or “AGM”) with various void designs are disclosed in international publication WO 2012 / 052172, the full text of which is incorporated herein by reference.

[0104] film layer

[0105] The backing layer 105 may be disposed beneath the absorbent core 104 and is the outermost layer of the absorbent article 100, thereby forming the surface of the absorbent article 100 facing the garment. The backing layer 105 may be bonded to the absorbent core 104 and / or the top layer 102 (around the outer periphery) by any suitable attachment method known in the art. For example, the backing layer 105 may be secured to the absorbent core 104 by a uniform, continuous layer of adhesive, a patterned layer of adhesive, or a separate array of adhesive lines, spirals, or dots. Alternatively, the attachment method may include the use of thermal bonding, pressure bonding, ultrasonic bonding, dynamic mechanical bonding, or any other suitable attachment method or combination of these methods known in the art.

[0106] The backing layer 105 may be impermeable or substantially impermeable to liquids (e.g., urine, menstrual fluid) under normal use conditions and may be made of a thin plastic film, but other liquid-impermeable flexible materials may also be used. The backing layer 105 prevents or at least inhibits the wetting of underwear, outerwear, bedding, etc. (which may be in contact with or adjacent to the article 10) by outflows absorbed and contained in the absorbent core 104. However, in some examples, the backing layer 105 may be configured to allow vapor to escape from the absorbent core 104 (i.e., “breathable”), while in other examples, the backing layer 105 may be configured to be vapor-impermeable (i.e., impermeable). The backing layer 105 may comprise a polymer film, such as a polyethylene film or a polypropylene film. Suitable materials for the backing layer 105 are thermoplastic films having a thickness of approximately 0.012 mm (0.5 mils) to 0.051 mm (2.0 mils). Any suitable liquid-impermeable backing known in the art may be used in this invention.

[0107] The backing layer 105 acts as a barrier to prevent fluid absorbed and retained in the absorbent core 104 from migrating to the outward-facing surface of the pad. The preferred material is a soft, smooth, and compliant vapor-permeable material that provides comfortable softness and conformability, and produces low noise, preventing annoying noise during movement.

[0108] The substrate can be a nonwoven fiber web with a basis weight of approximately 20 gsm to 50 gsm. In one example, the substrate can be a spunbond nonwoven fiber web of 23 gsm hydrophobic 4 denier polypropylene fiber, traded under the name F102301001, purchased from Fiberweb Neuberger.

[0109] The pad has an outward-facing side and an opposite, wearer-facing side. The outward-facing side of the pad may include a non-adhesive area and an adhesive area. To allow the user / wearer to attach the pad to the wearer-facing surface of the underwear in a suitable location, an adhesive area can be provided by any conventional means. Pressure-sensitive adhesives have been found to be very suitable for this application.

[0110] staggered wing

[0111] The wing design of this embodiment will be described below with reference to the accompanying drawings. First, the basic structure of the related women's triangle underwear will be introduced, and the design concept of this utility model will be derived from the basic structural dimensions of the women's triangle underwear.

[0112] Women's triangle underwear structure

[0113] Figure 4 and Figure 5 The diagram illustrates the structure of a typical women's triangle panty, showing the structure of the front panel 210 and the back panel 220, as well as key dimensions.

[0114] Typically, women's underwear designers have established that women's briefs are generally constructed by combining the front panel 210, the crotch panel U2, and the back panel 220. Here, to simplify the structural design, a two-piece design is used, and the crotch panel U2 is included in the structural drawing of the back panel 220.

[0115] Depend on Figure 4-5 As can be seen, the first width F of the front piece of the underwear front panel is 210. B1 The first width U of the back piece of the underwear back piece is 220. B1 They have roughly the same dimensions. Furthermore, the front panel 210 and back panel 220 of the underwear have a third width F in the front panel. B3 With the fourth width U of the rear piece B4 The seam is stitched at the suture point; in other words, the third width F of the front piece. B3 With the fourth width U of the rear piece B4 Both have roughly the same size.

[0116] See Figure 5 The back panel 220 of the underwear typically features a curved edge to fully conform to the curves of a woman's waist, hips, and crotch. In this text, the back panel 220 is divided into a first back panel U1 and a second back panel U2 (also referred to as the crotch panel). The waistline area of ​​the first back panel U1 features a concave arc, as shown in the first arc height U. ARC1 The markings indicate that a convex arc is constructed in the hip line area of ​​the first part 220U1 of the rear piece, as can be seen in the second arc height U of the rear piece. ARC2 The marking. In a non-restrictive underwear design, the first arc height U of the back piece. ARC1 With the second arc height U of the rear piece ARC2 They are the same size. Specifically, in Figure 4-5The non-restrictive design of the women's briefs shown is for a woman who is 155cm tall and has a hip circumference of 80cm. The crotch panel, specifically the third arc height U in the second back panel U2, is... ARC3 The dimension is the first arc height U of the rear piece. ARC1 Or the second arc height U of the rear piece ARC2 Twice that. Specifically, in this non-limiting design, the first arc height U of the rear piece. ARC1 and the second arc height U of the rear piece ARC2 It is approximately 0.5cm, and the third arc height of the back piece is U. ARC3 It is 1cm.

[0117] Figure 5 The coordinate system for the back panel of the underwear is also constructed, showing the horizontal coordinate X1 and the vertical coordinate Y1 of the back panel. Figure 5 In a non-limiting embodiment of the triangle-shaped underwear shown, the third arc height U of the back piece ARC3 It is an arc segment directly cut from a circle. Figure 5 Mark the radius R of the second arc of the rear piece. U And the center of the arc, which has the horizontal coordinate dimension of the second part of the back piece in the coordinate system of the underwear back piece. h 0 And the vertical coordinate dimension of the second part of the back piece k 0 See Figure 5 Furthermore, for ease of structural design of the staggered winglets according to this utility model, the arc curve is designated as follows: f 0 (y) .

[0118] staggered wing structure

[0119] Women's underwear typically has a crotch area that extends from near the pubic bone to near the coccyx, ranging from approximately 7cm to 135cm in length. For most women who are 155cm or taller, the crotch length is between 10cm and 135cm. However, for certain specific needs, the crotch length can reach 16cm. On the other hand, for most women who are 155cm or taller, the crotch width is usually 7cm-8cm in the front and 9cm-16.6cm in the back. Notably, some women's underwear has a minimum crotch width of 6.5cm to 7.5cm, or even less than 5cm.

[0120] In view of this, the symmetrically arranged flaps provided in the prior art typically cover the entire crotch area of ​​women's underwear in the longitudinal direction Y and have the same size in the transverse direction X, so as to be symmetrically arranged in the crotch area U2 of women's underwear relative to the longitudinal direction Y. However, excessively long flaps and excessively long flap adhesive, such as the flaps of 7cm (cm)-135cm mentioned above, often cause the flaps to be squeezed in the crotch area or the adhesive parts to stick together due to rapid wearing or improper fitting, which leads to discomfort for the female wearer and causes further leakage, inconvenience in peeling off absorbent materials, or skin damage from improper adhesion.

[0121] To overcome the shortcomings of the prior art, this utility model provides an interlaced wing configuration. Figure 6 The diagram shows a top view of an absorbent article according to a non-limiting embodiment of the present invention in the deployed wing configuration, with particular emphasis on the staggered arrangement of the crotch winglets and the outline configuration described in detail below.

[0122] In this non-limiting embodiment, the absorbent article 300 has a first flap 310 and a second flap 310' disposed to the lateral edge of the crotch piece U2. Specifically, the first flap 310 and the second flap 310' are configured to have the same longitudinal length, and the longitudinal length of the two flaps differs from the longitudinal dimension of the crotch piece U2. Compared to commercially available flaps that typically have a flap length of 7cm to 12cm, the longitudinal length of the two flaps according to this invention is 3cm to 10cm, and the lateral length of the two flaps is approximately 3cm to 8cm. That is, the longitudinal dimension of the first flap 310 and the second flap 310' near the lateral curves of the crotch piece U2 is reduced to approximately 30%-40% of that of prior art flaps, thereby enabling them to adapt to the curve of the lateral edge of the crotch piece U2 with a reduced length. Furthermore, the first wing 310 and the second wing 310' are also constructed with curved profiles at their inner edges near the crotch piece U2 of the women's underwear. These curved profiles can be represented as the inner edge curves of the first wing. f 1 (y) Second wing inner edge curve f 1 ’ (y) .

[0123] Furthermore, unlike the side flaps in the prior art which are symmetrically arranged on both sides of the crotch area of ​​women's underwear relative to the longitudinal direction Y, the first flap 310 and the second flap 310' of this invention are vertically spaced apart from each other along the longitudinal direction Y by a certain distance, as shown in the figure. w Specifically, such as Figure 6 and Figure 7As shown, when the first wing 310, located on the left side of the crotch piece U2 of the women's underwear, is positioned above the absorbent article 300 in the longitudinal direction, the second wing 310', located on the right side of the crotch piece U2 of the women's underwear, is positioned below the first wing 310 on the left. Therefore, the inner edge curve of the first wing... f 1 (y) Second wing inner edge curve f 1 ’ (y) Also should be based on Figure 5 The crotch panel curve of the underwear crotch panel U2 shown. f 0 (y) The longitudinal direction Y has different closed intervals.

[0124] Based on the aforementioned staggered design, the first wing 310 and the second wing 310' can also have a longer dimension in the lateral direction X compared to the side wing in the prior art. Specifically, the maximum dimension of the first wing 310 and the second wing 310' in the lateral direction X can be increased from 2 cm in the prior art to 7.5 cm. Furthermore, the first wing 310 and the second wing 310' are configured with a theoretically substantially identical outer edge curve profile on their outer edges away from the crotch piece U2, the curve expression being: Figure 6 The first outer edge curve shown f 2 (y) Furthermore, after the first wing 310 and the second wing 310' are overlapped below the crotch piece U2, the two form a partially complementary outer edge profile. In other words, through the first outer edge curve... f 2 (y) The first wing 310 located on the lateral left side of the crotch piece U2 and the second wing 310' located on the lateral right side of the crotch piece U2 are partially complementary in shape, and the two wings do not overlap or coincide. Therefore, the first wing 310 and the second wing 310' are respectively derived from the inner edge curves of the first wing and the second wing of the crotch piece U2, that is, from the inner edge curve of the first wing. f 1 (y) Second wing inner edge curve f 1 ’ (y) It extends towards the longitudinal center line of the crotch piece U2 of the underwear, thereby forming a surround of the crotch piece U2 of the women's underwear in the lateral direction X, thus avoiding improper overlapping and mutual adhesion during the wearing process caused by the excessively long symmetrical wings and excessively long adhesive on them in the prior art.

[0125] wing profile configuration

[0126] See Figure 6-9 Furthermore, this invention can also provide a more reasonable arrangement of the airfoils and the airfoil adhesive application method by means of integral theory. The following will use... Figure 6-7 Taking the first wing 310 as an example, this invention specifically describes the wing profile configuration and wing adhesive application arrangement claimed by this utility model. This wing profile configuration and wing adhesive application arrangement are particularly suitable for staggered wing structures.

[0127] exist Figure 6 In the non-limiting embodiment shown, the first winglet 310 is divided into multiple rectangles with a distance of b1 in the longitudinal direction Y. The first outer edge curve of the first winglet 310 can then be obtained along the longitudinal direction Y. f 2 (y) With the inner edge curve of the first wing f 1 (y) The area S of the first wing region enclosed by the first wing can be expressed as:

[0128] S (f 2 (y)-f 1 (y))dy (1)

[0129] Among them, variables y The range of variation is [ y 1 , y 2 ].

[0130] Specifically, in the first outer edge curve f 2 (y) With the inner edge curve of the first wing f 1 (y) When neither can be simply expressed by formula (1), the first wing region S can also be divided into multiple similar standard regions along the longitudinal direction Y, that is, rectangles constructed by multiple minimum widths b1. S 1 , S 2 ,…S n And through their additivity, the first wing region S is constructed:

[0131] S S 1 +S 2+…S n (2)

[0132] Furthermore, by substituting the first outer edge curve f 2 (y) With the inner edge curve of the first wing f 1 (y) Boundary values ​​at the intersection in the longitudinal direction Y y 1 and y 2 By performing definite integrals, the area of ​​the first wing region S can be determined:

[0133] S (3)

[0134] In particular, according to Figure 5 In the non-limiting embodiment of the underwear back piece 220 shown, the crotch curve is an arc segment directly cut from a circle, so in the underwear back piece coordinate system ( x 1, y In 1), its expression is the crotch curve. f 0 (y) It can be described as:

[0135] (xh 0 ) 2 +(yk 0 ) 2 =R U 2 (4)

[0136] Among them, U B3 x U B4 , a y a+U L2

[0137] Furthermore, based on formula (4), it can be derived that Figure 5 The crotch panel curve of the back panel 220 of the underwear shown. f 0 (y)， And from this we can know Figure 6 The inner edge curve of the first wing 310 shownf 1 (y) And the inner edge curve of the second wing 310' f 1 ’ (y) The crotch panel curves are respectively equivalent to the 220mm back panel of the underwear. f 0 (y) :

[0138] f 1 (y) =f 0 (y) (5)

[0139] f 1 ’ (y)=f 0 (y) (6)

[0140] However, the two have different variables. y The range of variation.

[0141] Based on this, the solution can be obtained for the adaptation to Figure 5 The first flap region S of the non-limiting embodiment of the back panel 220 of the underwear shown. Specifically, when the first flap 310 and the second flap 310' are configured to have different outer edge curves, the arrangement of the first flap 310 can also be determined according to the above method, and the distance between the first flap 310 and the second flap 310' vertically spaced apart in the longitudinal direction Y is determined by the already set distance. w To determine the positions of the two in the longitudinal direction Y.

[0142] Wing backing pattern layer

[0143] According to a non-limiting embodiment of the adhesive application arrangement for the crotch flap of the present invention, the adhesive pattern layer of the first flap 310 or 410 and the second flap 310' or 410' is configured as adhesive strips respectively disposed on each flap segment.

[0144] Alternatively, Figure 7 Shown by lines Figure 6 The diagram shows a top view of the absorbent article in the folded wing configuration, illustrating a non-limiting embodiment of the adhesive application arrangement for the crotch flap, and its outline configuration. The first adhesive strip group 320 and the first adhesive strip 321 with an integral rectangle width of b2 are clearly labeled in the figure.

[0145] Furthermore, Figure 7 The diagram schematically illustrates the inner edge curve of the first rubber strip assembly used for the first winglet 310. Figure 7The inner edge curve of the first adhesive strip group is represented as follows: f 3 (y) ; and the outer edge curve of the first rubber strip group used for the first wing 310, in Figure 7 The outer edge curve of the first adhesive strip group is represented as follows: f 4 (y) In the adhesive pattern layer of the first winglet 310, there is a first outer edge curve. f 2 (y) The blade is recessed generally toward the center of the first wing 310 to form the outer edge curve of the first rubber strip assembly. f 4 (y) The inner edge curve of the first wing f 1 (y) The blade is recessed generally toward the center of the first wing 310 to form the inner edge curve of the first rubber strip group. f 3 (y)。 Here, the center of the first wing 310 can be its center point as an irregular closed shape, which can be calculated, for example, using Green's theorem or line integrals. As a result, these two factors roughly define the outline and region of the adhesive pattern layer located on the first wing 310, and the area occupied by this region is constructed as the outer edge curve of the first adhesive strip assembly. f 4 (y) inner edge curve of the first adhesive strip group f 3 (y) The integral of the boundary region enclosed. Similarly, the adhesive pattern layer of the second wing 310' is substantially equivalent to the adhesive pattern layer of the first wing 310, and specifically consists of the outer edge curve of the second adhesive strip group. f 4 ’ (y) inner edge curve of the second adhesive strip group f 3 ’ (y) The enclosed boundary region is formed. This is formed by the second outer edge curve. f 2 ’ (y) Generally recessed toward the center of the second wing 310' to form the outer edge curve of the second adhesive strip assembly f 4 ’ (y) ; by the inner edge curve of the second wing f 1 ’ (y)Generally recessed toward the center of the second wing 310' to form the inner edge curve of the second adhesive strip assembly. f 3 ’ (y)。

[0146] Specifically, the inner edge curve of the first adhesive strip group f 3 (y) The first rubber strip group is recessed by r1 in a direction generally toward the center of the first wing 310, preferably by 3mm-5mm, and the outer edge curve of the first rubber strip group is... f 4 (y) The material is recessed by r2 generally toward the center of the first wing 310, preferably by 3mm-5mm. In other words, in the (X, Y) coordinate system shown in the figure, on the one hand, the inner edge curve of the first adhesive strip group... f 3 (y) Generally, the center of the first wing 310 has a recess in the lateral direction X, which is assumed to be r. x1 It also has an indentation in the longitudinal direction Y, which is assumed to be r. y1 ( Figure 7 r is not shown in detail in the text. x1 With r y1 On the other hand, the outer edge curve of the first adhesive strip group f 4 (y) Generally, it is recessed in the lateral direction X towards the center of the first wing 310. x2 And indented by r in the vertical direction Y. y2 See also Figure 7 .

[0147] Therefore, the inner edge curve of the first adhesive strip group can be constructed. f 3 (y) outer edge curve of the first adhesive strip group f 4 (y) The variation is:

[0148] f 3 (y) = f 1 (x-r x1 , y-r y1 )= f 0 (x-r x1 , y-r y1 ) (7)

[0149] f 4 (y) = f 1 (x-r x2 , y-r y2 )= f 0 (x-r x2 , y-r y2 ) (8)

[0150] For the sake of theoretical explanation, r is not mentioned in this paper. x1 With r y1 r x2 With r y2 The directionality is taken as the main consideration.

[0151] Therefore, the adhesive backing area of ​​the first winglet can be obtained. S 1 :

[0152] S 1 (9)

[0153] in, y 2> y 4> y 3> y 1.

[0154] Specifically, the maximum width of the first adhesive strip group 320 is configured not to exceed the maximum width of the first wing 310, and the maximum length of the first adhesive strip group 320 does not exceed the maximum length of the first wing 310. In a particular embodiment, 100% adhesive application can be achieved within the region S of the first wing 310. This adhesive application method is particularly suitable for larger female users to achieve sufficient adhesion between the wing and the wide crotch panel of the underwear. Preferably, the maximum area of ​​the first adhesive strip group 320 does not exceed 30-80% of the maximum area of ​​the first wing 310, and the first adhesive strip group 320 includes at least one first adhesive strip 321 along the transverse direction (X) or along the longitudinal direction Y, or at least six adhesive strips. Further, multiple groups of first adhesive strip groups 320 arranged along the longitudinal direction Y can be provided on the first wing 310, wherein each group of first adhesive strips 320 is spaced apart from each other in the longitudinal direction Y within the range of 1mm-3mm. More preferably, a first adhesive strip group 320 may be provided near the longitudinal upper edge of the first wing 310, and another first adhesive strip group 320 spaced apart from each other may be provided near the longitudinal lower edge of the first wing 310, thereby strengthening the adhesion between the first wing 310 and the crotch piece of the underwear.

[0155] According to another non-limiting embodiment of the present invention... Figure 8 The diagram shows a top view of the second absorbent article 400 in the deployed wing configuration, specifically showing the staggered arrangement of the crotch winglets and their outline configuration. Figure 9 It is shown in lines. Figure 8 The second absorbent article shown is a top view in the folded wing state, which shows the adhesive application arrangement for the crotch flap and its adhesive strip arrangement curve.

[0156] In this embodiment, the second absorbent article 400 has a size and structure that are significantly larger than the aforementioned first absorbent article 300. In particular, the first wing 410 and the second wing 410' of the second absorbent article 400 can be directly connected to the front wing of the front piece of the second absorbent article 400 and the rear wing of the rear piece of the second absorbent article 400, respectively, or can form an integral configuration with the front wing and the rear wing.

[0157] Figure 9 The diagram schematically illustrates the inner edge curve of the first adhesive strip group used in this embodiment for the first wing 410. Figure 9 The inner edge curve of the first adhesive strip group is represented as follows: f 7 (y) ; and the outer edge curve of the first rubber strip group used for the first wing 410, in Figure 9 The outer edge curve of the first adhesive strip group is represented as follows: f 8 (y) In the adhesive pattern layer of the first wing 410, there is a first outer edge curve. f 6 (y) The blade is recessed generally toward the center of the first winglet 410 to form the outer edge curve of the first rubber strip assembly. f 8 (y) The inner edge curve of the first wing f 5 (y) The blade is recessed generally toward the center of the first wing 410 to form the inner edge curve of the first rubber strip group. f 7 (y). Here. The center of the first wing 410 can be its center point as an irregular closed shape, for example, by using Green's formula. Alternatively, it can be calculated using line integrals. Therefore, the adhesive pattern layer of the first wing 410 is constructed as the outer edge curve of the first adhesive strip group. f 8 (y) inner edge curve of the first adhesive strip group f 7 (y) The integral of the bounded boundary region. Similarly, the adhesive pattern layer of the second wing 410' is specifically defined by the outer edge curve of the second adhesive strip group. f8 ’ (y) inner edge curve of the second adhesive strip group f 7 ’ (y) The enclosed boundary region is formed. Among them, the second outer edge curve... f 6 ’ (y) The outer edge curve of the second rubber strip group is formed by recessing roughly towards the center of the second wing 410'. f 8 ’ (y) The inner edge curve of the second wing f 5 ’ (y) The inner edge curve of the second rubber strip group is formed by recessing roughly towards the center of the second wing 410'. f 7 ’ (y)。 The adhesive pattern layer of the second wing 410' is substantially the same as the adhesive pattern layer of the first wing 410.

[0158] Based on the above formula, the inner edge curve of the second adhesive strip group can also be assumed. f 7 (y) outer edge curve of the second adhesive strip group f 8 (y) Each has indentations r1 and r2 similar to those described above, preferably 3mm-5mm, and can also be constructed in the manner described above. x1 With r y1 r x2 With r y2 The inner edge curve of the second adhesive strip group f 7 (y) outer edge curve of the second adhesive strip group f 8 (y) They can be represented as follows:

[0159] f 7 (y) = f 5 (x-r x1 , y-r y1 )= f 0 (x-r x1 , y-r y1 ) (11)

[0160] f 8 (y) = f 6 (x-r x2 , y-r y2 )= f 0 (x-r x2 , y-r y2 ) (12)

[0161] Preferably, in this embodiment, the second wing 410 of the absorbent article 400 is provided with multiple sets of second adhesive strips 420 spaced apart from each other, and each adhesive backing region S2 can be represented, for example, as:

[0162] S 2 (13)

[0163] in, m The number of adhesive strip groups is preferably up to 6 second adhesive strips, or up to 6 adhesive strips applied along the longitudinal direction Y. See also Figure 9 The diagram preferably shows a schematic of two sets of second adhesive strips 420 spaced apart from each other. The arrangement of each adhesive backing area S2 can be found above and will not be repeated here.

[0164] In view of this, based on the concept of the staggered winglets of this utility model, the inner and outer edge curves of the winglets can be structurally designed according to different female body types and different underwear crotch patterns. The maximum adhesive pattern layer is obtained by shrinking the inner and outer edge curves of the winglets, and various different adhesive application settings are made in the maximum adhesive pattern layer. Thus, the constructed staggered winglets are suitable for matching the crotch curves of various designs of women's underwear, effectively avoiding the overlap, irregularity and overlap of symmetrical winglets in the crotch area in the prior art.

[0165] The embodiments of this utility model have been illustrated and described herein, but those skilled in the art should understand that various modifications, omissions, and additions can be made without departing from the spirit and scope of this utility model. It should not be understood as limited to the specific embodiments described herein, but encompasses all possible embodiments embodied within the scope and equivalents of the features described in the appended claims.

[0166] The dimensions and values ​​disclosed herein should not be construed as strictly limited to the precise numerical values ​​stated. Rather, unless otherwise specified, each such dimension is intended to represent the value and a functionally equivalent range around that value. For example, a dimension disclosed as “40 mm” is intended to represent “approximately 40 mm”.

[0167] All documents referenced in the “Detailed Description” section are incorporated herein by reference in the relevant sections; no reference to any document should be construed as an admission that it is prior art concerning this utility model. In the event of any conflict between the meaning or definition of any term in this written document and the meaning or definition of any term in the referenced documents, the meaning or definition assigned to the term in this written document shall prevail.

[0168] While specific embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that many other changes and modifications can be made without departing from the spirit and scope of the present invention. Therefore, the appended claims are intended to cover all such changes and modifications within the scope of the present invention.

Claims

1. An absorbent article (300, 400) having staggered fins, comprising at least a top layer, a flow layer, an absorbent core, and a bottom layer, characterized in that, Also includes: The wing has a first wing (310, 410) disposed on the right lateral edge of the body of the absorbent article (300, 400) and a second wing (310', 410') disposed on the left lateral edge of the body of the absorbent article (300, 400), and the first wing (310, 410) and the second wing (310', 410') extend opposite to each other from the body of the absorbent article (300, 400) in the lateral direction (X), respectively. Among them, the first wing (310, 410) and the second wing (310', 410') respectively have the inner edge curve of the first wing on the inner edge adjacent to the crotch piece (U2) of the female underwear. f 1 (y), f 5 (y) ) and the inner edge curve of the second wing ( f 1 '(y), f 5 ’(y) ), the inner edge curve of the first winglet ( f 1 (y),f 5 (y) ) and the inner edge curve of the second wing ( f 1 '(y), f 5 ’(y) All of them are roughly shaped to fit the crotch curve of women's underwear (U2). f 0 (y) ); The first wing (310, 410) and the second wing (310', 410') have substantially the same outer edge curve at the outer edge away from the crotch piece (U2) of the female underwear; The first wing (310, 410) and the second wing (310', 410') each have a maximum lateral length that can generally cover the width of the crotch panel (U2) of a woman's underwear; In the state where the first wing (310, 410) and the second wing (310', 410') are superimposed on the crotch piece (U2), the first outer edge curve of the first wing (310, 410) and the second outer edge curve of the second wing (310', 410') form partial complementarity in the areas opposite to each other, and the first wing (310, 410) and the second wing (310', 410') do not overlap.

2. The absorbent article (300, 400) with staggered fins according to claim 1, characterized in that, The area of ​​the region enclosed by the first winglet (310, 410) is constructed as the first outer edge curve. f 2 (y) , f 6 (y) ) and the inner edge curve of the first winglet ( f 1 (y) , f 5 (y) The integral of the boundary region enclosed by the second wing (310', 410'); the area of ​​the region enclosed by the second wing (310', 410') is constructed as the second outer edge curve ( f 2 ’(y) , f 6 ’(y) ) and the inner edge curve of the second wing ( f 1 '(y), f 5 ’(y) The integral of the boundary region enclosed by the second wing (310', 410'); wherein the area of ​​the region enclosed by the second wing (310', 410') is approximately equal to the area of ​​the region enclosed by the first wing (310, 410).

3. The absorbent article (300, 400) with staggered fins according to claim 2, characterized in that, The adhesive pattern layer of the first winglet (310, 410) is configured such that the outer edge curve of the first adhesive strip group ( f 4 (y),f 8 (y)) The inner edge curve of the first adhesive strip group ( f 3 (y),f 7 (y)) The defined area that it occupies is defined by the outer edge curve of the first adhesive strip group ( f 4 (y) , f 8 (y)) The inner edge curve of the first adhesive strip group ( f 3 (y),f 7 (y)) The integral of the enclosed boundary region; where the first outer edge curve ( f 2 (y) , f 6 (y) It is generally recessed toward the center of the first winglet (310, 410) to form the outer edge curve of the first rubber strip group. f 4 (y) , f 8 (y) ); Inner edge curve of the first winglet ( f 1 (y), f 5 (y) It is generally recessed toward the center of the first winglet (310, 410) to form the inner edge curve of the first rubber strip group. f 3 (y), f 7 (y)) ; Furthermore, the adhesive pattern layer of the second wing (310', 410') is constructed to form the outer edge curve of the second adhesive strip group. f 4 ’ (y) , f 8 ’ (y) ) With the inner edge curve of the second adhesive strip group ( f 3 ’ (y),f 7 ’ (y)) The integral of the bounded boundary region; where the second outer edge curve ( f 2 ’ (y) , f 6 ’ (y) It is generally recessed toward the center of the second wing (310', 410') to form the outer edge curve of the second rubber strip assembly. f 4 ’ (y) , f 8 ’ (y) ); the inner edge curve of the second winglet ( f 1 ’ (y), f 5 ’ (y) It is generally recessed toward the center of the second wing (310', 410') to form the inner edge curve of the second rubber strip group. f 3 ’ (y),f 7 ’ (y)) .

4. The absorbent article (300, 400) with staggered fins according to claim 2, characterized in that, The adhesive pattern layer of the first winglet (310, 410) and the second winglet (310', 410') is configured as adhesive strips respectively disposed on each winglet segment.

5. The absorbent article (300, 400) with staggered fins according to claim 3, characterized in that, In the adhesive pattern layer of the first winglet (310, 410), the first outer edge curve ( f 2 (y) , f 6 (y) The indentation distance towards the center of the first winglet (310, 410) is approximately 3 to 5 millimeters; this indentation distance is approximately equal to the inner edge curve of the first winglet. f 1 (y), f 5 (y) The distance by which it is recessed roughly toward the center of the first winglet (310, 410).

6. The absorbent article (300, 400) with staggered fins according to any one of claims 3 and 4, characterized in that, The second wing (310', 410') has a backing pattern layer area that is substantially the same as that of the first wing (310, 410), and the area of ​​the backing pattern layer of the first wing (310, 410) is at most 30-80% of the area of ​​the first wing (310, 410).

7. The absorbent article (300, 400) with staggered fins according to claim 6, characterized in that, The adhesive pattern layer of the first wing (310, 410) and / or the adhesive pattern layer of the second wing (310', 410') shall include at least one adhesive strip arranged in the transverse direction (X) or the longitudinal direction (Y).

8. The absorbent article (300, 400) with staggered fins according to claim 3, characterized in that, Up to three adhesive-backed regions can be constructed within the first wing (310, 410) and / or the second wing (310', 410'), wherein each adhesive-backed region is spaced 1 to 3 millimeters apart from each other in the longitudinal direction (Y).

9. The absorbent article (300, 400) with staggered fins according to claim 1, characterized in that, With the first wing (310, 410) and the second wing (310', 410') overlapped onto the crotch piece (U2), the distance between the first outer edge curve of the first wing (310, 410) and the second outer edge curve of the second wing (310', 410') is between 1 mm and 3 mm.

10. The absorbent article (300, 400) with staggered fins according to claim 1, characterized in that, The longitudinal lengths of the first winglet (310, 410) and the second winglet (310', 410') are both approximately between 3 cm and 10 cm; and the lateral lengths of the first winglet (310, 410) and the second winglet (310', 410') are approximately between 3 cm and 8 cm.

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