Partitioned composite absorbing core body and absorbing clothes with same

Abstract

The utility model discloses a partition type composite absorption core body which comprises a liquid permeable top layer, a partition layer and an absorption layer, -a bottom layer; -an intermediate diversion layer between the top layer and the bottom layer; -a first polymeric layer between the top layer and the intermediate diversion layer; -a second polymeric layer between the intermediate diversion layer and the bottom layer; the absorption core is provided with a middle area, a front side area and a rear side area in the longitudinal direction, the length of the front side area is not larger than 15% of the total length, the total length of the front side area and the rear side area is not larger than 50% of the total length, and the front side area is not provided with the middle flow guide layer and at least one of the first polymer layer and the second polymer layer. The partition type composite absorption core body can provide thinner and breathable feelings for consumers and reduce the manufacturing cost of the composite absorption core body. The utility model further relates to absorptive clothes with the partition type composite absorption core body.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sanitary product technical field, concretely relates to a zoned composite absorbent core and absorbent clothing with it. BACKGROUND

[0002] Consumers rely on disposable absorbent products in their daily lives, including articles such as adult incontinence products, training pants, and diapers. Many manufacturers strive to better meet the needs of users for such products. For example, there is a need for further improvements in the fit, discretion, and leakage protection of many products.

[0003] An important component of many absorbent articles is the absorbent body, such as an absorbent core, included in such articles. These absorbent bodies are generally responsible for capturing and retaining liquid body exudates, thereby preventing the exudates from leaking from the absorbent article, and further keeping the liquid away from the wearer's skin, which helps to promote skin health. Improving the structure and performance of absorbent bodies to produce thinner products that absorb liquid faster and leak less is a consistently important area of market demand.

[0004] The absorbent core of the disposable absorbent products commonly seen on the market can be roughly divided into two types: traditional core and composite absorbent core. The traditional core is commonly formed by fluff pulp, water-absorbing powder, hot melt adhesive and wrapping non-woven fabric, and its shape can be designed as a long rectangular or dumbbell shape. The traditional core has good softness and strong fluidity, but it is relatively thick and heavy, has poor air permeability, and the core is easily hardened after being squeezed, which destroys its softness and gives an uncomfortable touch.

[0005] The composite absorbent core is generally composed of two layers of non-woven material, an intermediate layer of fluffy layer and two layers of superabsorbent resin material. For example, reference can be made to the composite absorbent core disclosed in Chinese Patent Application No. CN202222200844.3, which includes a diffusion absorption layer, an intermediate layer and a barrier absorption layer stacked in sequence. The barrier absorption layer is a segmented hollow viscose fiber non-woven fabric, and in the segmented hollow viscose fiber non-woven fabric, the hollow segments and solid segments of the fibers are arranged alternately or spaced apart. This composite absorbent core overcomes the shortcomings of the wood pulp core, such as being too thick and prone to layer breakage and lumping. It improves the shortcomings of the existing composite absorbent core, such as poor temporary liquid capturing capacity and weak diffusion performance, effectively improves the multiple liquid absorbing capacity of the product, significantly improves the diffusion performance of the absorbent core, and has good absorption performance and anti-back seepage performance.

[0006] In order to ensure that the composite absorbent core has good fit with the wearer and prevent leakage, the composite absorbent core is usually designed in a shape of a long rectangle or dog bone, in which the two end portions of the composite absorbent core in the longitudinal direction can extend to the wearer's abdomen and upper buttock groove, respectively. During actual use, the wearer's body exudates are constrained by gravity and the limited fluid diffusion of the composite absorbent core, and are often not used for absorbing and retaining the body exudates near the two end portions of the composite absorbent core. Since the composite absorbent core is composed of multiple layers of superabsorbent particles and multiple layers of nonwoven fabric, on the one hand, the composite absorbent core thus designed has a high material cost and causes material waste, and on the other hand, since the absorbent core is disposable, it also brings great pressure to the environment. Further, since the two end portions of the composite absorbent core are closer to the wearer's skin than the crotch portion, the wearer also has an uncomfortable feeling of stuffiness or poor air permeability.

[0007] Therefore, there is still a need for improvement of the absorbent core such as the absorbent article, in which the improved composite absorbent core can improve the utilization rate of the composite absorbent core and reduce material waste while maintaining the basic absorption performance of the product, and also help to reduce environmental pressure and improve the user experience of consumers. Practical new type content

[0008] Therefore, the task of the present application is to provide a zoned composite absorbent core and a garment having the same, thereby overcoming the shortcomings of the prior art.

[0009] In order to accomplish the above task, the present application provides a zoned composite absorbent core, which extends in a transverse direction and a longitudinal direction and has a thickness in a vertical direction perpendicular to the transverse direction and the longitudinal direction, the absorbent core comprising: a liquid permeable top layer; a bottom layer; an intermediate fluid conducting layer between the top layer and the bottom layer; a first high molecular layer between the top layer and the intermediate fluid conducting layer, wherein the first high molecular layer is at least partially uniformly distributed with first superabsorbent polymer particles; a second high molecular layer between the intermediate fluid conducting layer and the bottom layer, wherein the second high molecular layer is at least partially uniformly distributed with second superabsorbent polymer particles; wherein the absorbent core has a middle region defining a urination region, a front side region in front of the urination region, and a rear side region behind the urination region along the longitudinal direction, wherein the length of the front side region along the longitudinal direction is not more than 15% of the total length of the absorbent core in the longitudinal direction, and the total length of the front side region and the rear side region is not more than 50% of the total length of the absorbent core in the longitudinal direction, and wherein at least one of the intermediate fluid conducting layer and the first and second high molecular layers is not provided in the front side region.

[0010] Therefore, the consumer is more thin and breathable when using the absorbent product with the composite absorbent core of the present application. At the same time, the manufacturing cost of the composite absorbent core can be reduced to a certain extent, for example, the material cost can be reduced by 10 to 20%.

[0011] As a preferred aspect, only the second polymer layer is provided in the front region without the first polymer layer and the intermediate flow layer, and a non-woven wrapping layer is further included above the top layer, wherein the wrapping layer at least partially wraps the top layer, the bottom layer and the intermediate flow layer.

[0012] As a preferred aspect, only the first polymer layer is provided in the front region without the second polymer layer and the intermediate flow layer, and a non-woven wrapping layer is further included below the bottom layer, wherein the wrapping layer at least partially wraps the top layer, the bottom layer and the intermediate flow layer.

[0013] As a preferred aspect, the length of the back region in the longitudinal direction is not more than 45% of the total length of the absorbent core in the longitudinal direction, and at least one of the first polymer layer and the second polymer layer is not provided in the back region without the intermediate flow layer.

[0014] As a preferred aspect, only the second polymer layer is provided in the back region without the first polymer layer and the intermediate flow layer, and a non-woven wrapping layer is further included above the top layer, wherein the wrapping layer at least partially wraps the top layer, the bottom layer and the intermediate flow layer.

[0015] As a preferred aspect, only the first polymer layer is provided in the back region without the second polymer layer and the intermediate flow layer, and a non-woven wrapping layer is further included below the bottom layer, wherein the wrapping layer at least partially wraps the top layer, the bottom layer and the intermediate flow layer.

[0016] As a preferred aspect, neither the first polymer layer nor the second polymer layer nor the intermediate flow layer is provided in the front region and the back region, and a first non-woven wrapping layer above the top layer and a second non-woven wrapping layer below the bottom layer are further included, wherein the first and second non-woven wrapping layers at least partially wrap the top layer, the bottom layer and the intermediate flow layer.

[0017] As a preferred aspect, the intermediate flow layer comprises or consists of synthetic fibers, in particular wherein the intermediate flow layer is a carded non-woven layer.

[0018] As a preferred aspect, wherein the first superabsorbent polymer particles and the second superabsorbent polymer particles are identical, and wherein the composite absorbent core comprises at least 60 weight percent of superabsorbent polymer particles based on the total weight of the composite absorbent core, wherein the superabsorbent polymer particles have a basis weight of 100 gsm to 500 gsm.

[0019] According to another aspect of the present application, there is also provided an absorbent garment, wherein the absorbent garment extends in a longitudinal direction and a transverse direction, and wherein the absorbent garment comprises: a body side liner; an outer cover; and a composite absorbent core disposed between the body side liner and the outer cover, wherein the composite absorbent core is the zoned composite absorbent core as described above. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a perspective view of the absorbent garment in a closed configuration;

[0021] Figure 2 is a perspective view of the absorbent garment in an open and laid flat configuration; Figure 1 is a plan view of the absorbent garment;

[0022] Figure 3 is a front end view of the zoned composite absorbent core of the present application;

[0023] Figure 4 is a side view of a first embodiment of the zoned composite absorbent core of the present application;

[0024] Figure 5 is a side view of a second embodiment of the zoned composite absorbent core of the present application;

[0025] Figure 6 is a side view of a third embodiment of the zoned composite absorbent core of the present application.

[0026] Reference numbers repeated in the present specification and drawings are intended to denote the same or similar elements in the present application. DETAILED DESCRIPTION

[0027] The utility model relates to a kind of zoned composite absorbent core, the absorbent core extends in transverse direction and longitudinal direction and has thickness in vertical direction perpendicular to the transverse direction and the longitudinal direction, the absorbent core includes :-liquid permeable top layer;-bottom layer;-the intermediate flow layer between the top layer and the bottom layer;-the first high molecular layer between the top layer and the intermediate flow layer, wherein the first high molecular layer is at least partially uniformly distributed with first superabsorbent polymer particles;-the second high molecular layer between the intermediate flow layer and the bottom layer, wherein the second high molecular layer is at least partially uniformly distributed with second superabsorbent polymer particles;Wherein, absorbent core has middle area defining urination area along the longitudinal direction, front side area located in front of urination area and rear side area located in rear of urination area, wherein the length of front side area along longitudinal direction is no more than 15% of the total length of absorbent core in longitudinal direction and the total length of front side area and rear side area is no more than 50% of the total length of absorbent core in longitudinal direction, wherein the front side area is not provided with any one of the first high molecular layer and second high molecular layer and intermediate flow layer.

[0028] The term absorbent "article" or "garment" refers herein to an article that can be placed in close proximity to or adjacent to (i.e., abutting) a wearer's body to absorb and contain various liquids, solid and semi-solid exudates discharged from the body. As described herein, such absorbent articles are intended to be discarded after a limited period of use and are not intended to be laundered or otherwise restored for reuse. It should be understood that the present disclosure applies to a variety of disposable absorbent articles, including but not limited to diapers, training pants, sport pants, swim pants, and incontinence products, among others.

[0029] The term "joined" refers herein to the joining, adhering, connecting, attaching, or the like, of two elements. Two elements will be considered joined together when they are directly or indirectly connected to one another. Joining can be accomplished through the use of adhesives, pressure fitting, heat bonding, ultrasonic bonding, stapling, sewing, welding, or the like.

[0030] The term "bonded carded web" refers herein to a web made from staple fibers that are sent through a card or carding unit that separates or spreads and aligns the staple fibers in the machine direction to form a generally machine direction oriented fibrous nonwoven web. Such materials can be bonded together through processes including point bonding, air bonding, ultrasonic bonding, adhesive bonding, or the like.

[0031] "Connected" refers to the joining, adhering, bonding, attaching, or the like, of two elements. Two elements will be considered connected together when they are directly or indirectly connected to one another.

[0032] “Disposable” refers to an article designed to be discarded after a limited use rather than washed or otherwise restored for reuse.

[0033] “Disposed,”“disposed on,” and variations thereof are intended to mean that an element can be integral with another element or that an element can be a separate structure joined to, or placed with, or in the vicinity of, another element.

[0034] “Elastic,”“elasticized” and“elasticity” mean that property of a material or composite by virtue of which it tends to recover its original size and shape after removal of a force causing a deformation.

[0035] “Elastomer” refers to a material or composite that can be elongated by at least 50 percent of its relaxed length and will recover at least 20 percent of the elongation upon release of the applied force. It is generally preferred that the elastomeric material or composite be capable of being elongated at least 50 percent, more preferably at least 100 percent, and still more preferably at least 300 percent of its relaxed length and will recover at least 50 percent of the elongation upon release of the applied force.

[0036] The term“nonwoven fabric” or“nonwoven web” refers herein to a web having a structure of individual fibers or threads which are interlaced, but not in a identifiable manner as in a knitted or woven fabric. Nonwoven fabrics or webs have been formed from many processes such as, for example, meltblowing processes, spunbonding processes, bonded-carded web processes (also known as BCW and TABCW), and the like.

[0037] The term“spunbond web” refers herein to a web containing substantially continuous filaments. The filaments are formed by extruding a molten thermoplastic material through a plurality of fine, normally circular, capillaries of a spinneret with the diameter in the range of from about 0.05 to about 0.2 mm and by rapidly solidifying the extruded filaments by a process such as quenching with a gas or by other well known spunbonding means. Spunbond webs are normally non-tacky after they are deposited onto a collecting surface. Spunbond webs can sometimes have diameters less than about 40 microns, and are often between about 5 to about 20 microns.

[0038] “Superabsorbent polymer,”“superabsorbent material,”“SAP,” or“SAM” shall be used interchangeably and shall mean a polymer that can absorb and retain very large amounts of liquid in relation to its own mass. Crosslinkable water-absorbing polymers, which are classified as hydrogels, absorb aqueous solutions by means of hydrogen bonding and other polar forces to water molecules. The water-absorbing capacity of SAP is based in part on the ionicity (an index of the ionic concentration of the aqueous solution) and the polar functionality of the SAP that has a water affinity.

[0039] "Particles," "particulates," and the like, when used in conjunction with the term "superabsorbent polymer," refer to the form of discrete units. These units can include flakes, fibers, clumps, granules, powders, spheres, pulverized materials, and the like, as well as combinations thereof. The particulates can have any desired shape: for example, cubic, rod-like polyhedron, spherical or semi-spherical, circular or semi-circular, angular, irregular, and the like.

[0040] "Particulate superabsorbent polymer" and "particulate superabsorbent polymer composition" refer to the form of superabsorbent polymer and superabsorbent polymer composition in discrete form, wherein the "particulate superabsorbent polymer" and "particulate superabsorbent polymer composition" can have a particle size of less than 1000 μιη, or from about 150 μιη to about 850 μιη.

[0041] These terms can be defined in additional languages throughout the balance of the specification.

[0042] Reference Figures 1 to 2 The garment 20 extends along a longitudinal direction 23 and a transverse direction 22 that is perpendicular to the longitudinal direction 23. In the present novel, the terms "longitudinal" and "transverse" have their customary meanings, as indicated by a central longitudinal axis 24 and a central transverse axis 25. The central longitudinal axis 24 lies in the plane of the article when the garment 20 is in a fully stretched and laid flat condition, at which time the front panel 40 and the back panel 41 are separated, and is generally parallel to a vertical plane that bisects a wearer standing upright into left and right halves when the garment 20 is worn. The central transverse axis 25 lies in the plane of the article and is generally perpendicular to the central longitudinal axis 24. The garment 20 has a front region 30 that defines a front waist end edge 32, a back region 34 that defines a back waist end edge 36, and a crotch region 38 that is positioned longitudinally between the front region 30 and the back region 34. The crotch region 38 defines two transversely opposed crotch side edges 39. The garment 20 defines a garment length 21 that extends from the front waist end edge 32 to the back waist end edge 36.

[0043] The garment 20 includes a front panel 40 that defines a front panel leg edge 44 spaced longitudinally inward from the front waist end edge 32, and first and second transversely opposed front panel side edges 46 and 48. The garment 20 also includes a back panel 41 that defines a back panel leg edge 45 spaced longitudinally inward from the back waist end edge 36, and first and second transversely opposed back panel side edges 47 and 49. "Longitudinally inward (or inboard)" as used to describe the garment embodiments herein refers to the direction longitudinally toward the central transverse axis 25. Similarly, "transversely inward (or inboard)" as used to describe the garment embodiments herein refers to the direction transversely toward the central longitudinal axis 24. The front panel 40 is longitudinally spaced from the back panel 41.

[0044] A pair of side seams 84, 84 connect the front region 30 to the back region 34 such that the garment 20 defines a waist opening 27 and a pair of leg openings 28. The side seams can be permanent but tearable, for example by adhesive, heat, pressure, or ultrasonic bonding, or can be more readily releasable and refastenable, for example by use of mechanical fastening elements.

[0045] The garment 20 can also include at least one front leg elastic member 70 disposed proximate the front panel leg edge 44 and / or at least one back leg elastic member 75 disposed proximate the back panel leg edge 45. Such leg elastic members 70 and / or 75 help provide additional elastic support around the leg openings 28 to enhance the fit and containment of the garment 20. Each leg elastic member 70, 75 can comprise a single strip, strand, or thread of elastic material, or each leg elastic member can comprise two, three, or more strips, strands, or threads of elastic material. Elastic strips, strands, threads, and the like suitable for use in disposable absorbent garments are known in the art.

[0046] Optionally, the back leg elastic member 75 and / or the front leg elastic member 70 extends laterally across the entire garment width. Also optionally, as representatively shown in, for example, Figure 1 and 2 The back leg elastic member 75 can comprise a pair of back leg elastic members, for example first and second back leg elastic members 76, 77 located on opposite sides of the absorbent composite 50. Similarly, the front leg elastic member 70 can comprise a pair of front leg elastic members, for example first and second front leg elastic members 71, 72 located on opposite sides of the absorbent composite 50. In preferred embodiments, as representatively shown in, for example, Figure 1 and 2 Each back leg elastic member 75 can comprise a plurality of elastic strands, and / or each front leg elastic member 70 can comprise a plurality of elastic strands.

[0047] Optionally, an absorbent composite 50 is attached to and positioned between the front panel 40 and the back panel 41. The absorbent composite 50 can include a composite structure formed of a liquid-impermeable barrier 52 defining a width 53 and a length 51, a zoned composite absorbent core 54 comprising an absorbent material, a liquid-permeable liner 55, and / or a crotch elastic member 56. As used herein, the term "absorbent material" can refer to fibrous absorbent material, superabsorbent material (SAM), or a combination of both fibrous absorbent material and superabsorbent material. In some embodiments, the zoned composite absorbent core 54 can include a layered structure comprising multiple zones of liquid-absorbing material, such as fibrous absorbent material and / or superabsorbent material. The zoned composite absorbent core 54 defines a length 61 and a width 63. Further description of an exemplary zoned composite absorbent core 54 of the present disclosure is provided below with reference to Figures 3 to 6 Further description of an exemplary zoned composite absorbent core 54 of the present disclosure.

[0048] A urine discharge area, generally indicated by reference P, for a generally facing urine discharging organ of a wearer is generally positioned within the area enclosed by the composite absorbent core 54 of the absorbent composite 50. It is contemplated that the location of the urine discharge area P within the composite absorbent core 54 of the absorbent composite 50 can vary depending on whether the absorbent garment or article is worn by a girl or a boy. Generally, for boys, the urine discharge area P will be more proximate to the front waist end edge 32, while for girls, the urine discharge area P will be generally symmetrical with respect to the central transverse axis 25. As is known, the urine discharge area P is configured to absorb bodily fluids, such as urine, discharged from the body. Thus, a more forwardly positioned location in the composite absorbent core 54 can be more suitable for boys, while a more centrally positioned location between the legs can be more suitable for girls. For example, in one embodiment, the urine discharge area P has a width between about one quarter of the total length of the composite absorbent core 54 and about one half of the total length thereof after absorbing a preselected amount of liquid.

[0049] It should be understood that the exemplary pant-like garment 20 is only one possible example of an absorbent article that can be used with the described zoned composite absorbent core 54 of the present disclosure. Such garment 20 can be generally described as being formed using a cross direction (CD) manufacturing process, as shown in Figure 1 and 2

[0050] In Figure 3 Figure 2 ​​Fig. 3 is a cross-sectional view taken along the transverse cross-sectional line 3-3 of the zoned composite absorbent core 54 in Fig. 2. The zoned composite absorbent core 54 has a thickness along the vertical direction 33 (which is perpendicular to the transverse direction 22 and the longitudinal direction 23) and comprises from top to bottom: a liquid permeable top layer 541, e.g. made of a nonwoven fabric; a bottom layer, e.g. made of a nonwoven fabric; an intermediate acquisition layer 543 between the top layer and the bottom layer; a first polymer layer 542A between the top layer 541 and the intermediate acquisition layer 543, wherein the first polymer layer 542A has at least partially distributed therein first superabsorbent polymer particles; a second polymer layer 542B between the intermediate acquisition layer 543 and the bottom layer, wherein the second polymer layer 542B has at least partially distributed therein second superabsorbent polymer particles.

[0051] Intermediate flow guide layer

[0052] The intermediate acquisition layer 543 in the embodiments of the present application is designed to be high-loft. The term "high-loft" refers to a low-density loose fabric as compared to a flat paper-like fabric, characterized by a relatively high porosity. This means that there is a relatively large amount of void space between its fibers, in which superabsorbent polymer particles can be distributed.

[0053] The intermediate acquisition layer 543 is preferably a nonwoven, but other types of high-loft materials are not excluded. The intermediate acquisition layer 543 can comprise or consist of synthetic fibers, optionally mixed with cellulose fibers or natural fibers of cotton or viscose. The intermediate acquisition layer 543 can be substantially free of free cellulose fibers, which are not bound together with the other fibers of the nonwoven. The amount of such free cellulose fibers in the absorbent core can be less than 10% of the total absorbent core weight, or less than 5% of the total absorbent core weight, or less than 1% of the total absorbent core weight, or be completely free of such free cellulose fibers. The high-loft material can comprise at least 10%, 30%, 50%, 70%, 90% and at most 100% of synthetic fibers, by weight of the high-loft layer.

[0054] The fibers forming the intermediate acquisition layer 543 can be made partly or entirely of relatively elastic synthetic fibers, in particular polypropylene (PP), polyamide (PA, such as nylon) or polyethylene terephthalate (PET) fibers. The diameter of the fibers can for example be in the range of 0.01 mm to 0.50 mm.

[0055] The thickness, basis weight and density of the intermediate flow layer 543 is generally uniform in the transverse direction and in the longitudinal direction. The orientation of the fibers in the intermediate flow layer 543 can be non-uniform, for example in a carded nonwoven fabric. Furthermore, the fiber orientation in the intermediate flow layer 543 in the thickness direction z can differ from the predominant orientation in one or both directions x and / or y. As an example, the basis weight of the high loft intermediate flow layer 543 can for example be 15 gsm to 500 gsm, in particular 30 gsm to 200 gsm, for example 50 gsm to 120 gsm. The values indicated herein for the intermediate flow layer 543 are considered individually for the high loft material, i.e. before the SAP particles are applied with adhesive thereon. When the absorbent core comprises two or more high loft intermediate layers, these intermediate flow layers 543 can be the same or different.

[0056] Top and bottom layers

[0057] As shown in Figures 4 to 6 The high loft intermediate flow layer 543 is sandwiched between a top layer 541 A and a bottom layer 541 B. The top layer 541 A is located on the side of the composite absorbent core body 54 intended to be placed closest to the wearer-facing side of the absorbent article. The top layer is therefore liquid permeable so that fluid can easily pass through the top layer to the intermediate flow layer 543 during use. The bottom layer 541 B is positioned on the other side of the intermediate layer. The bottom layer can be liquid permeable or liquid impermeable. The top and bottom layers provide a cover on both sides of the intermediate layer for preventing SAP particles from falling out of the high loft material during the composite absorbent core body 54 and article manufacturing process and / or during use of the absorbent article.

[0058] The top layer 541 A and the bottom layer 541 B can be made of relatively thin and inexpensive materials, such as are commonly used to produce conventional cores. The top layer 541 A and the bottom layer 541 B can be for example a thin paper (air-through-bonded or wet-laid) having a basis weight range of for example 5 to 100 gsm, in particular 10 to 40 gsm. The top layer 541 A and the bottom layer 541 B can also be formed of a low basis weight nonwoven web having a basis weight between 5 gsm and 30 gsm, such as a carded nonwoven, a spunbond nonwoven (“S”), or a meltblown nonwoven (“M”), and laminates of any of these. For example, a spunmelt polypropylene nonwoven is suitable, in particular a nonwoven having a laminate web SMS or SMMS or SSMMS structure and having a basis weight range of about 5 gsm to 20 gsm.

[0059] Preferably, the top layer can be wider than the bottom layer, so that this excess material can be folded around the longitudinal side edges of the composite absorbent core body 54 to form a C-shaped wrap seal over the top layer, as shown in Figure 3Of course, it is also feasible to design the top layer 541 to have the same width as the bottom layer or a width smaller than that of the bottom layer.

[0060] First and second high molecular layers

[0061] like Figures 3 to 6 As shown, a first polymer layer 542A is sandwiched between the top layer 541A and the middle guide layer 543, and a second polymer layer 542B is sandwiched between the middle guide layer 543 and the bottom layer 541B. As is known, the first polymer layer 542A can be composed of a polymer material of first superabsorbent polymer particles and fluff pulp or only of the first superabsorbent polymer particles laid flat, that is, the first superabsorbent polymer particles are at least partially evenly distributed in the first polymer layer 542A. Similarly, the second polymer layer 542B can be composed of a polymer material of second superabsorbent polymer particles and fluff pulp or only of the second superabsorbent polymer particles laid flat, that is, the second superabsorbent polymer particles are at least partially evenly distributed in the second polymer layer 542A. Preferably, the first superabsorbent polymer particles and the second superabsorbent polymer particles are the same.

[0062] As used herein, the term "superabsorbent polymer" (abbreviated herein in the singular and plural as "SAP") refers to an absorbent material that can absorb at least 10 times its weight in a 0.9% saline solution as measured using the Centrifuge Retention Capacity (CRC) test (EDANA method NWSP 241.0.R2 (19)). The SAP preferably has a CRC value of at least 15 g / g.

[0063] SAP is normally a water-insoluble but water-swellable cross-linked polymer that can absorb a large amount of fluid. SAP is in particulate form, so that it can flow under dry conditions. Typical particulate SAP is a polyacrylate polymer, but other polymeric materials can also be used. For example, starch-based particulate absorbent polymer materials, and starch graft copolymers of polyacrylamide copolymers, ethylene maleic anhydride copolymers, cross-linked carboxymethyl cellulose, polyvinyl alcohol copolymers, cross-linked polyethylene oxide and polyacrylonitrile can also be used.

[0064] The SAP particles can be relatively small in their dry state (their longest dimension is less than 1 mm) and can be roughly round in shape, but granules, fibers, flakes, spheres, powders, sheets, and other shapes and forms are also known to those skilled in the art. Typically, SAP can be in the form of spherical particles. Thus, the absorbent material can consist of or essentially consist of SAP distributed within a high loft nonwoven. The composite absorbent core comprises at least 60 weight percent superabsorbent polymer particles based on the total weight of the composite absorbent core, wherein the superabsorbent polymer particles have a basis weight of 100 gsm to 500 gsm.

[0065] First embodiment

[0066] In Figure 4 a first embodiment of the present application is shown in a side view, which is a cross-sectional view taken along the longitudinal direction 24 of the partitioned composite absorbent core 54 in the urine discharge area P.

[0067] As Figure 2 and 4 shown in FIGS. 1 and 2, the absorbent core 54 in the absorbent composite 50 has a middle region 61B (which is generally symmetrical about the central transverse axis 25) defining a urine discharge area P, a front side region 61A forward of the urine discharge area P, and a rear side region 61C rearward of the urine discharge area P, in the longitudinal direction 23. Herein, the length of the front side region 61A in the longitudinal direction 23 is no more than 15% of the total length 61 of the absorbent core 54 in the longitudinal direction 23, and the total length of the front side region 61A and the rear side region 61C is no more than 50% of the total length 61 of the absorbent core 54 in the longitudinal direction 23. Herein, by way of example, the length of the front side region 61A is 10% of the total length 61 of the absorbent core 54 in the longitudinal direction 23, and the length of the middle region 61B is 5% of the total length 61 of the absorbent core 54 in the longitudinal direction 23.

[0068] The inventors have observed that, in the worn state, the urine discharge area P in the middle region 61B of the composite absorbent core 54 in the longitudinal direction 23 is generally aligned with the wearer's urine discharge organ by the caregiver or wearer. At the same time, the front side region 61A forward of the urine discharge area P and the rear side region 61C rearward of the urine discharge area P tend to extend over the wearer's abdomen and upper buttocks, respectively. During actual use, the wearer's body exudates are constrained by gravity and the limited fluid spreading of the composite absorbent core 64, and the front side region 61A forward of the urine discharge area P and the rear side region 61C rearward of the urine discharge area P tend not to be used for absorbing and retaining body exudates.

[0069] To this end, in the first embodiment, the portion of the layered structure on the body-facing side of the composite absorbent core 54 is removed or thinned. Specifically, in Figure 4In the embodiment shown, the intermediate flow guide layer 543 and the first polymer layer 542A are not provided in the front region 61A. In this way, on the one hand, the material cost of the composite absorbent core 54 and the impact on the natural environment after it is discarded after use can be saved; on the other hand, since part of the layer structure of the composite absorbent core 52 is removed in the front region 61A, the material thickness between the wearer's skin can be reduced in the wearer's abdomen, so that the wearer's uncomfortable feeling of being stuffy or not breathable can be eliminated to a certain extent. After the inventor conducted a plurality of tests, shortening or canceling the intermediate flow guide layer 543 and the first polymer layer 542A in the range of the front region 61A will not cause urine to escape, even if the wearer's instantaneous urination speed is very large or the wearer is crawling on the ground.

[0070] Preferably, the intermediate flow guide layer 543 and the first polymer layer 542A are also not provided in the rear region 61C. Similarly, such a design of shortening or canceling part of the layer structure can save the material cost of the composite absorbent core 54 and the impact on the natural environment after it is discarded after use on the one hand; on the other hand, the material thickness between the wearer's skin can be reduced in the wearer's buttocks, so that the wearer's uncomfortable feeling of being stuffy or not breathable can be eliminated to a certain extent. After the inventor conducted a plurality of tests, shortening or canceling the intermediate flow guide layer 543 and the first polymer layer 542A in the range of the rear region 61C will not cause urine to escape, even if the wearer's instantaneous urination speed is very large or the wearer is lying on the ground.

[0071] More preferably, in order to ensure the structural integrity of the composite absorbent core 54, the embodiment shown herein further includes a non-woven wrapping layer 541A located above the top layer 541C, wherein the length of the wrapping layer 541A is designed to be substantially the same as the total length 61 of the longitudinal direction 23 of the absorbent core 54, thereby allowing it to at least partially wrap the top layer 541C, the bottom layer 541B and the intermediate flow guide layer 543.

[0072] Second embodiment

[0073] In Figure 5 The second embodiment of the present application is shown in a side view, which is a cross-sectional view obtained by cutting the urine discharge area P of the zoned composite absorbent core 54 along the longitudinal direction 24.

[0074] As Figure 2 and 5As shown in the middle, the absorbent core 54 in the absorbent composite 50 has a middle region 61B (here the middle region 61B is generally symmetrical with respect to the central transverse axis 25) defining a urine discharge region P, a front side region 61A in front of the urine discharge region P, and a rear side region 61C behind the urine discharge region P, along the longitudinal direction 23. Here, the length of the front side region 61A along the longitudinal direction 23 is no more than 15% of the total length 61 of the absorbent core 54 along the longitudinal direction 23, and the total length of the front side region 61A and the rear side region 61C is no more than 50% of the total length 61 of the absorbent core 54 along the longitudinal direction 23. Here, as an example, the length of the front side region 61A is 10% of the total length 61 of the absorbent core 54 along the longitudinal direction 23, and the length of the rear side region 61B is 5% of the total length 61 of the absorbent core 54 along the longitudinal direction 23.

[0075] Similarly to the first embodiment, here the portion of the layer structure on the garment-facing side of the composite absorbent core 54 is removed or thinned. Specifically, in the Figure 5 In the embodiment shown, the middle flow guide layer 543 and the second polymer layer 542B are not provided in the front side region 61A. In this way, on the one hand, the material cost of the composite absorbent core 54 and the impact on the natural environment after it is discarded after use can be saved; on the other hand, since part of the layer structure of the composite absorbent core 52 is removed in the front side region 61A, the material thickness between the wearer's abdomen and the wearer's skin can be reduced, thereby to some extent eliminating the wearer's discomfort of being hot or not breathable. After many experiments by the inventor, it is found that shortening or canceling the middle flow guide layer 543 and the second polymer layer 542B in the range of the front side region 61A will not cause urine to escape, even if the wearer's instantaneous urination speed is very large or the wearer is crawling on the ground.

[0076] Preferably, the middle flow guide layer 543 and the second polymer layer 542B are also not provided in the rear side region 61C. Similarly, such a design of shortening or canceling part of the layer structure can on the one hand save the material cost of the composite absorbent core 54 and the impact on the natural environment after it is discarded after use; on the other hand, the material thickness between the wearer's buttocks and the wearer's skin can be reduced, thereby to some extent eliminating the wearer's discomfort of being hot or not breathable. After many experiments by the inventor, it is found that shortening or canceling the middle flow guide layer 543 and the second polymer layer 542B in the range of the rear side region 61C will not cause urine to escape, even if the wearer is lying on the ground.

[0077] More preferably, to ensure the structural integrity of the composite absorbent core 54, the embodiment shown herein further comprises a non-woven wrapping layer 541B under the bottom layer 541C, wherein the length of the wrapping layer 541B is designed to be substantially the same as the total length 61 of the longitudinal direction 23 of the absorbent core 54, thereby allowing it to at least partially wrap the top layer 541A, the bottom layer 541B and the intermediate fluid conducting layer 543.

[0078] Third embodiment

[0079] In Figure 6 a third embodiment of the present application is shown in a side view, which is a cross-sectional view taken along the longitudinal direction 24 of the partitioned composite absorbent core 54.

[0080] As Figure 2 and 6 shown in the first embodiment, the absorbent core 54 in the absorbent composite 50 has a middle region 61B (which is substantially symmetrical with respect to the central transverse axis 25) defining a urine discharge region P, a front side region 61A in front of the urine discharge region P and a rear side region 61C behind the urine discharge region P along the longitudinal direction 23. Herein, the length of the front side region 61A along the longitudinal direction 23 is no more than 15% of the total length 61 of the longitudinal direction 23 of the absorbent core 54 and the total length of the front side region 61A and the rear side region 61C is no more than 50% of the total length 61 of the longitudinal direction 23 of the absorbent core 54. Herein, as an example, the length of the front side region 61A is 10% of the total length 61 of the longitudinal direction 23 of the absorbent core 54 and the length of the rear side region 61B is 5% of the total length 61 of the longitudinal direction 23 of the absorbent core 54.

[0081] Similar to the first embodiment, the partial layer structure of the body-facing and garment-facing sides of the composite absorbent core 54 is removed or thinned. Specifically, in the embodiment shown in Figure 6 the first high polymer layer 541C, the intermediate fluid conducting layer 543 and the second high polymer layer 542B are not provided in the front side region 61A. In this way, on the one hand, the material cost of the composite absorbent core 54 and the impact on the natural environment after it is discarded can be saved; on the other hand, since the composite absorbent core 52 removes part of the layer structure in the front side region 61A, the material thickness between the wearer's skin can be reduced in the wearer's abdomen, thereby to a certain extent, the wearer's discomfort of being stuffy or not breathable can be eliminated. After many experiments by the inventor, shortening or canceling the first high polymer layer 541C, the intermediate fluid conducting layer 543 and the second high polymer layer 542B in the range of the front side region 61A will not cause urine to escape, even when the wearer's instantaneous urination speed is very large or the wearer is crawling on the ground.

[0082] Preferably, the first polymer layer 541C, the intermediate flow conductor layer 543 and the second polymer layer 542B are also not provided in the rear region 61C. In the same way, such a shortened or cancelled partial layer structure design can on the one hand save material costs for the composite absorbent core 54 and the environmental impact of its disposal after use, and on the other hand reduce the material thickness between the wearer's skin at the wearer's buttocks, so that the wearer's feeling of stuffiness or lack of air permeability can be eliminated to some extent. After many experiments by the inventor, shortening or cancelling the first polymer layer 541C, the intermediate flow conductor layer 543 and the second polymer layer 542B in the range of the rear region 61C does not result in urine leakage, even if the wearer's instantaneous urination speed is very high or the wearer is lying on the ground.

[0083] More preferably, in order to ensure the structural integrity of the composite absorbent core 54, the embodiment shown herein also includes a non-woven wrapping layer 541A above the top layer 541C and a non-woven wrapping layer 541B below the bottom layer 541D, wherein the length of the wrapping layer 541A and the wrapping layer 541B is designed to be substantially the same as the total length 61 of the longitudinal direction 23 of the absorbent core 54, thereby allowing at least partial wrapping of the top layer 541A, the bottom layer 541B and the intermediate flow conductor layer 543 by means of the two.

[0084] Compared with the prior art, tests in the laboratory by the inventor show that in products implementing the technical solutions of the present application, consumers are more thin and breathable when using the paper diaper. At the same time, the manufacturing cost of the composite absorbent core can be reduced to some extent, for example, the material cost can be reduced by 10 to 20%.

[0085] It is also desirable to point out that although the absorbent garment is shown herein in the form of a pant-type product such as a baby diaper, the technical solutions of the present application can also be applied to adult diapers and female sanitary products.

[0086] The above and other various changes, omissions, additions and modifications can be made to the embodiments of the present application without departing from the spirit and scope of the present application, which should be understood by those skilled in the art. It should not be construed as being limited to the specific embodiments described herein, but it encompasses all possible embodiments within the scope of the features described in the appended claims and within the equivalent scope thereof.

[0087] The dimensions and values disclosed herein are not to be understood as being strictly limited to the exact numerical values recited. Instead, unless otherwise specified, each such dimension is intended to mean both the recited value and functionally equivalent values within a range surrounding that value. For example, a dimension disclosed as "40 mm" is intended to mean "about 40 mm."

[0088] All documents cited in the DETAILED DESCRIPTION are, in relevant part, incorporated herein by reference; the citation of any document is not to be construed as an admission that it is prior art with respect to the present application. To the extent that any meaning or definition of a term in this written document conflicts with any meaning or definition of the term in a document incorporated by reference, the meaning or definition assigned to the term in this written document shall control.

[0089] While particular embodiments of the present application have been shown and described in detail, it will be understood by those skilled in the art that many other modifications, substitutions and changes can be made to the embodiments without departing from the spirit and scope of the present application. Accordingly, it is intended that all encompass within the scope of the present application and be limited only by the broadest permissible interpretation of the appended claims.

[0090] When introducing elements of the present application or the preferred embodiments(s) thereof, the articles "a", "an", "the" and "said" are intended to mean that there are one or more than one of the elements. The terms "comprising", "including" and "having" are intended to be inclusive and allow for additions. Many modifications and variations to the present application can be made without departing from its spirit and scope. Therefore, the above embodiments are not to be taken as limiting the scope of the present application.

Claims

1. A zoned composite absorbent core extending in a transverse direction and a longitudinal direction and having a thickness in a direction perpendicular to the transverse direction and the longitudinal direction, the absorbent core comprising: -Liquid-permeable top layer; - bottom floor; - an intermediate distribution layer between the top layer and the bottom layer; - a first polymer layer between the top layer and the middle distribution layer, wherein first superabsorbent polymer particles are at least partially uniformly distributed in the first polymer layer; - a second polymer layer between the intermediate guide layer and the bottom layer, wherein second superabsorbent polymer particles are at least partially uniformly distributed in the second polymer layer; Its characteristic is that the absorbent core has a middle area defining a urination area along the longitudinal direction, a front area located in front of the urination area and a rear area located behind the urination area, wherein the length of the front area along the longitudinal direction is not more than 15% of the total length of the absorbent core in the longitudinal direction and the total length of the front area and the rear area is not more than 50% of the total length of the absorbent core in the longitudinal direction, wherein at least one of the first polymer layer and the second polymer layer and the intermediate guide layer are not provided in the front area.

2. The partitioned composite absorbent core according to claim 1, wherein: The front side region is provided with only the second polymer layer and is not provided with the first polymer layer and the intermediate guide layer, and further comprises a non-woven wrapping layer located above the top layer, wherein the wrapping layer at least partially wraps the top layer, the bottom layer and the intermediate guide layer.

3. The partitioned composite absorbent core according to claim 1, wherein: The front side region is provided with only the first polymer layer and is not provided with the second polymer layer and the intermediate guide layer, and further comprises a non-woven wrapping layer located below the bottom layer, wherein the wrapping layer at least partially wraps the top layer, the bottom layer and the intermediate guide layer.

4. The partitioned composite absorbent core according to claim 1, wherein: The length of the rear region in the longitudinal direction is no more than 45% of the total length of the absorbent core in the longitudinal direction, and at least one of the first and second polymer layers and the intermediate guide layer are not provided in the rear region.

5. The partitioned composite absorbent core according to claim 4, wherein: The rear side region is provided with only the second polymer layer and is not provided with the first polymer layer and the intermediate guide layer, and further comprises a non-woven wrapping layer located above the top layer, wherein the wrapping layer at least partially wraps the top layer, the bottom layer and the intermediate guide layer.

6. The partitioned composite absorbent core according to claim 4, wherein: The back side region is provided with only the first polymer layer and is not provided with the second polymer layer and the intermediate guide layer, and further comprises a non-woven wrapping layer located below the bottom layer, wherein the wrapping layer at least partially wraps the top layer, the bottom layer and the intermediate guide layer.

7. The partitioned composite absorbent core according to claim 4, wherein: The front side area and the back side area are not provided with the first polymer layer, the second polymer layer and the intermediate guide layer, and further include a first non-woven wrapping layer located above the top layer and a second non-woven wrapping layer located below the bottom layer, respectively, wherein the first non-woven wrapping layer and the second non-woven wrapping layer at least partially wrap the top layer, the bottom layer and the intermediate guide layer.

8. The partitioned composite absorbent core according to any one of claims 1 to 7, characterized in that: The central distribution layer comprises or consists of synthetic fibers, in particular wherein the central distribution layer is a carded nonwoven layer.

9. The partitioned composite absorbent core according to any one of claims 1 to 7, characterized in that: wherein the first and second superabsorbent polymer particles are the same, and wherein the composite absorbent core comprises at least 60 weight percent superabsorbent polymer particles, based on the total weight of the composite absorbent core, wherein the superabsorbent polymer particles have a basis weight of 100 gsm to 500 gsm.

10. An absorbent garment, wherein the absorbent garment extends in a longitudinal direction and a transverse direction, characterized in that include: body side lining; outer covering; A composite absorbent core disposed between the bodyside liner and the outer cover, wherein the composite absorbent core is a zoned composite absorbent core according to any one of claims 1 to 9.

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