Absorbing core body with cool feeling and absorbing product with same

Abstract

The utility model discloses an absorption core body with a cool feeling, which comprises a liquid-permeable top layer wrapping material which is a spunbond fiber web or a hot air fiber web; -an underlayer wrapping material; -a reinforcing material between the top layer wrapping material and the bottom layer wrapping material; -a layer of temperature control material on at least one side of the top wrapping material, the layer of temperature control material having a microencapsulated phase change material, the layer of temperature control material having a phase transition temperature of 28 to 36 DEG C. Therefore, the temperature adjusting and energy storing functions can be provided for consumers under the condition that the size or the absorbing function of the absorbing core body is not affected. The utility model further relates to an absorption product with the absorption layer.

Description

Technical Field

[0001] This utility model relates to the field of disposable hygiene products, and more particularly to an absorbent core with a cooling effect that can provide a cooling effect to the wearer and an absorbent article having the absorbent core. Background Technology

[0002] Consumers rely on disposable absorbent products in their daily lives, including items such as adult incontinence products, bedwetting pants, training pants, and diapers. Many manufacturers strive to better meet users' needs for these products. A key component of many absorbent products is the absorbent core, such as the absorbent insert, contained within the product. These absorbent cores are typically responsible for capturing and retaining bodily fluids, preventing leakage from the absorbent product, and further keeping the fluid away from the wearer's skin, which helps promote skin health. Improving the structure and performance of absorbent cores to produce thinner products that absorb fluids faster and leak less is a continuously important area of ​​market demand.

[0003] The absorbent cores of commonly available disposable absorbent products can be broadly categorized into two types: traditional cores and composite cores. Traditional cores typically consist of fluff pulp, absorbent powder, hot melt adhesive, and a non-woven fabric covering. Their shape can be designed as a long rectangle or a dumbbell shape. Traditional cores offer good softness and high conductivity, but are relatively thick and heavy, have poor breathability, and tend to harden after compression, compromising their softness and providing an uncomfortable feel. Composite absorbent cores, on the other hand, usually include absorbent polymer materials such as hydrogel-forming polymers, also known as absorbent gelling agents (AGM) or superabsorbent polymers (SAP). These absorbent polymers ensure that large amounts of bodily fluids, such as urine, are absorbed and locked in during use, thus providing low backflow and good skin dryness.

[0004] To maintain the mechanical stability or structural integrity of these absorbent core structures, superabsorbent fixatives (SIs) can be added to stabilize the absorbent polymer material. In some cases, the superabsorbent fixative can be a fibrous structure. The fibrous structure can be an adhesive, i.e., a material having a matrix polymer along with other materials such as, for example, tackifiers, plasticizers, oils, and / or waxes. It has been found that even in high-speed manufacturing processes for composite absorbent cores, there is still a significant possibility of the absorbent core structure breaking or its structural integrity being compromised.

[0005] For absorbent products, consumer preferences are shifting towards softer, smoother, and more breathable thinner wearables without significant compromises or reductions in absorbency and absorption rate. Because absorbent products are in frequent contact with the consumer's skin and remain in contact for extended periods, there are high requirements for both the absorbent product itself and the local microclimate.

[0006] Currently, problems such as bacterial infections, skin rashes, and excessive skin hydration frequently occur during the use of absorbent products. This is because the absorbent product covers the skin for extended periods, creating a humid local microclimate, relatively high temperature, and high hydration, which provides a favorable environment for the survival and reproduction of bacteria and fungi. However, most absorbent products do not possess both heat storage and temperature regulation capabilities simultaneously. Therefore, whether using traditional or composite absorbent cores, providing them with temperature regulation and energy storage functions has considerable application value.

[0007] In summary, there exists in the art an absorbent core and absorbent articles thereof that provide a satisfactory wearing experience and offer consumers temperature regulation and energy storage functions, thereby allowing the fulfillment of the aforementioned unmet consumer needs in the market. Utility Model Content

[0008] Therefore, the objective of this invention is to provide an absorbent core with a cooling sensation, thereby at least partially overcoming the shortcomings of the prior art.

[0009] To accomplish the above tasks, this utility model provides a cooling absorbent core, which extends in both the transverse and longitudinal directions and has a thickness in the vertical direction perpendicular to the transverse and longitudinal directions. The absorbent core comprises: - a liquid-permeable top layer covering material, wherein the top layer covering material is a spunbond fiber web or a hot-air fiber web; - a bottom layer covering material; - a reinforcing material between the top layer covering material and the bottom layer covering material, wherein the reinforcing material comprises fluff pulp fibers and superabsorbent polymer particles located therein, wherein the superabsorbent polymer particles are deposited in the top layer covering material and the bottom layer covering material... The first is previously mixed with fluff pulp fibers, the fluff pulp fibers forming a three-dimensional network comprising reticular fluff pulp fibers, and wherein the superabsorbent polymer particles are fixed within the network, the reticular fluff pulp fibers and the superabsorbent polymer particles extending through the three-dimensional space defined by the reticular fluff pulp fibers and the superabsorbent polymer particles, and wherein the reticular fluff pulp fibers extend in a random orientation throughout the three-dimensional space; - a temperature-regulating material layer located on at least one side of the top coating material, wherein the temperature-regulating material layer contains microencapsulated phase change material, wherein the temperature-regulating material layer has a phase change transition temperature of 28 to 36 degrees.

[0010] Compared with the prior art, the cooling absorbent core according to this utility model can provide consumers with temperature regulation and energy storage functions without affecting the size or absorption function of the absorbent core. This allows absorbent products with the absorbent core according to this utility model to relieve wearers from the discomfort of stuffiness and dampness when wearing them in hot weather, thereby effectively meeting the unmet consumer needs of the market.

[0011] This invention also provides another cooling absorbent core, which extends in both the transverse and longitudinal directions and has a thickness in the vertical direction perpendicular to the transverse and longitudinal directions. The absorbent core comprises: - a liquid-permeable top layer covering material, wherein the top layer covering material is a spunbond web or a hot-air web; - a bottom layer covering material; - a reinforcing material between the top layer covering material and the bottom layer covering material, wherein the reinforcing material comprises a first polymer layer and a second polymer layer below it, wherein the first polymer layer is composed of a polymer material of a first superabsorbent polymer particle laid flat and an adhesive, and the second polymer layer is composed of a polymer material of a second superabsorbent polymer particle laid flat and an adhesive; - a temperature-regulating material layer located on at least one side of the top layer covering material, wherein the temperature-regulating material layer contains a microencapsulated phase change material, wherein the temperature-regulating material layer has a phase change temperature between 28 and 36 degrees Celsius.

[0012] Compared with the prior art, the cooling absorbent core of this invention can provide consumers with temperature regulation and energy storage functions without affecting the size or absorption function of the absorbent core. Surprisingly, the cooling absorbent core of this invention has satisfactory structural integrity, which is very advantageous in some respects.

[0013] As a preferred aspect of the present invention, it further includes a temperature-variable material layer located between the top coating material and the reinforcing material, wherein the temperature-variable material layer has a width of approximately 2 to 6 centimeters and includes temperature-variable particles with a diameter between 200 and 1000 micrometers, wherein the temperature-variable particles are xylitol particles or microencapsulated phase change material particles.

[0014] As a preferred aspect of this utility model, the top layer wrapping material is a multilayer nonwoven fabric in which spunbond web layers are stacked in 2, 3, or 4 layers with a basis weight between 7 g / m² and 20 g / m².

[0015] As a preferred aspect of this utility model, the top layer wrapping material is a plain weave or 3D hot air nonwoven fabric with a basis weight between 7 grams per square meter and 20 grams per square meter.

[0016] As a preferred aspect of the present invention, the total amount of the temperature-changing particles added to the temperature-changing material layer is in the range of 2 to 12 grams.

[0017] As a preferred aspect of this invention, the total amount of the temperature-changing particles added to the temperature-changing material layer is approximately 6 grams.

[0018] As a preferred aspect of the present invention, the wettable dry weight of the microencapsulated phase change material in the temperature-regulating material layer of the top encapsulating material is in the range of 8 to 20 grams per square meter.

[0019] As a preferred aspect of the present invention, the first superabsorbent polymer particles and the second superabsorbent polymer particles are identical, and the cooling absorbent core comprises at least 60% by weight of superabsorbent polymer particles based on the total weight of the absorbent core, wherein the basis weight of the superabsorbent polymer particles is from 100 g / m² to 500 g / m².

[0020] In another aspect of this utility model, an absorbent article is also disclosed, wherein the absorbent article extends in a longitudinal and transverse direction and includes: a body side liner; an outer cover; and an absorbent core disposed between the body side liner and the outer cover, wherein the absorbent core is the aforementioned cooling absorbent core. Attached Figure Description

[0021] Figure 1 This is a perspective view of an absorbent article in a closed configuration;

[0022] Figure 2 It is in an open and flat configuration. Figure 1 A plan view of the absorbent product;

[0023] Figure 3 This is a cross-sectional view of a conventional absorber core in existing technology;

[0024] Figure 4 This is a cross-sectional view of a composite absorber core in the prior art;

[0025] Figure 5 This is a cross-sectional view of the absorbent core with fluff pulp according to the present invention;

[0026] Figure 6 This is a cross-sectional view of the composite absorbent core according to the present invention;

[0027] Figure 7 These are comparative views of the structural integrity of the absorber core according to this utility model;

[0028] Figure 8 The image shows a comparison view of the cooling effect of the absorbent core according to the present invention. Detailed Implementation

[0029] 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.

[0030] Certain directional terms used in the description of the accompanying drawings below, such as “inner,” “outer,” “upper,” “lower,” and other directional terms, shall be understood to have their normal meaning and refer to those directions involved when normally viewing the drawings. Unless otherwise specified, the directional terms used in this specification are generally in accordance with the conventional directions understood by those skilled in the art.

[0031] The terms “first,” “first,” “second,” “second,” and similar terms used in this utility model do not indicate any order, quantity, or importance, but are used to distinguish one component from other components.

[0032] Terminology Definition

[0033] The term "absorbent article" or "absorbent fabric" as used herein 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 disclosure, this disclosure applies to a variety of disposable absorbent articles, including but not limited to diapers, training pants, sports pants, swim trunks, and incontinence products.

[0034] The term "bonded" in this document refers to the joining, adhesion, connection, attachment, etc., of two elements. Two elements are considered bonded together when they are joined, adhered, connected, attached, etc., directly or indirectly to each other, such as when bonded to an intermediate element. Bonding can be achieved by, for example, adhesives, pressure bonding, thermal bonding, ultrasonic bonding, binding, stitching, and / or welding.

[0035] The term "bonded and combed web" in this document refers to a web made of short fibers that are fed through a combing or carding unit, which separates or spreads the short fibers along the machine direction and aligns them to form a nonwoven web of fibers with a generally machine-oriented orientation. This material can be bonded together by methods including point bonding, air bonding, ultrasonic bonding, and adhesive bonding.

[0036] "Connection" refers to the joining, bonding, joining, or attachment of two components. When two components are directly connected to each other or indirectly, such as when each component is directly connected to an intermediate component, they are considered to be connected together.

[0037] "Disposable" refers to products designed to be discarded after limited use rather than washed or otherwise recovered for reuse.

[0038] The terms “set up,” “set on,” and their variations are intended to indicate that a component can be integrated with another component, or that a component can be a separate structure that is combined with another component or placed together with or near another component.

[0039] "Elasticity," "elasticity," and "elasticity" refer to the properties of materials or composite materials that allow them to tend to return to their original size and shape after the forces that caused the deformation have been removed.

[0040] "Elastomer" means a material or composite material that can stretch at least 50% of its relaxed length and recover at least 20% of its elongation after the applied force is released. Generally preferred is that the elastomeric material or composite material can be stretched to at least 50% of its relaxed length, more preferably at least 100%, and even more preferably at least 300%, and recover at least 50% of its elongation after the applied force is released.

[0041] The terms "nonwoven fabric" or "nonwoven web" as used herein refer to a web having an interwoven structure of individual fibers or yarns, but not in a identifiable manner as in woven fabrics. Nonwoven fabrics or webs have been formed using various processes such as meltblown, spunbond, and bonded carded web processes (also known as BCW and TABCW).

[0042] The term "spunbond web" as used herein refers to a web comprising substantially continuous fibers of small diameter. These fibers are formed by extruding molten thermoplastic material from numerous fine, typically circular capillaries of a spinneret, followed by a rapid reduction in fiber diameter through, for example, traction drawing and / or other well-known spunbonding methods. Spunbond webs are generally non-sticky when placed on a collecting surface. Spunbond webs can sometimes have a diameter of less than about 40 micrometers, and are typically between about 5 and about 20 micrometers.

[0043] The terms “superabsorbent polymer,” “superabsorbent material,” “SAP,” or “SAM” should be used interchangeably and should refer to polymers that absorb and retain very large amounts of liquid relative to their own mass. Crosslinkable hydrogels classified as hydrogels absorb aqueous solutions through hydrogen bonds and other polar forces with water molecules. The absorbency of SAP is partly based on its ionicity (an index of the ion concentration in the aqueous solution) and the hydrophilic polar functional groups of SAP.

[0044] When used with the term "superabsorbent polymer," "particles," "microparticles," etc., refer to the form of discrete units. These units can include flakes, fibers, clumps, particles, powders, spheres, pulverized materials, and combinations thereof. Microparticles can have any desired shape: for example, cubes, rod-shaped polyhedra, spherical or hemispherical shapes, circular or semi-circular shapes, angular shapes, irregular shapes, etc.

[0045] "Particulate superabsorbent polymer" and "particulate superabsorbent polymer composition" refer to the form of a discrete superabsorbent polymer and a superabsorbent polymer composition, wherein the "particulate superabsorbent polymer" and "particulate superabsorbent polymer composition" may have a particle size of less than 1000 μm, or a particle size from about 150 μm to about 850 μm.

[0046] These terms can be defined in additional language in the rest of the instruction manual.

[0047] Absorbent products

[0048] First, combine with the appendix Figures 1 to 2 An example of an absorbent article 20 using an absorbent core has been described. It should be noted that, although in Figures 1 to 2 The description is presented as disposable underwear, but absorbent products 20 also include, but are not limited to, training pants, sports pants, swimming pants, and incontinence products.

[0049] Reference Figures 1 to 2 The absorbent article 20 extends along a longitudinal direction 23 and a transverse direction 22 perpendicular to the longitudinal direction 23. In this invention, the terms "longitudinal" and "transverse" have their conventional meanings, as indicated by the central longitudinal axis 24 and the central transverse axis 25. The central longitudinal axis 24 lies in the plane of the article when the absorbent article 20 is in a fully stretched and flat state, at which point the front piece 40 and the rear piece 41 are separated, and when the absorbent article 20 is worn, it is generally parallel to the vertical plane that divides a standing wearer into left and right halves. The central transverse axis 25 lies in the plane of the article and is generally perpendicular to the central longitudinal axis 24. The absorbent article 20 has a front region 30 defining a front waist end edge 32, a rear region 34 defining a rear waist end edge 36, and a crotch region 38 longitudinally positioned between the front region 30 and the rear region 34. The crotch region 38 defines two transversely opposed crotch side edges 39. The absorbent article 20 defines an absorbent article length 21 extending from the front waist end edge 32 to the rear waist end edge 36.

[0050] The absorbent article 20 includes a front piece 40 defining a front leg edge 44 longitudinally inwardly spaced from the front waist end edge 32 and laterally opposed first front side edges 46 and second front side edges 48. The absorbent article 20 also includes a rear piece 41 defining a rear leg edge 45 longitudinally inwardly spaced from the rear waist end edge 36 and laterally opposed first rear side edges 47 and second rear side edges 49. "Longitudinally inwardly (or inside)" used to describe embodiments of the absorbent article herein means in a direction longitudinally toward the central transverse axis 25. Similarly, "laterally inwardly (or inside)" used to describe embodiments of the absorbent article herein means in a direction laterally toward the central longitudinal axis 24. The front piece 40 and the rear piece 41 are longitudinally spaced apart.

[0051] A pair of side seams 84, 84 connect the front region 30 to the rear region 34, such that the absorbent article 20 defines a waist opening 27 and a pair of leg openings 28. The side seams may be permanent but tearable, for example by adhesive, heat, pressure or ultrasonic bonding, or may be more easily released and re-secured, for example by using mechanical fastening elements.

[0052] The absorbent article 20 may further include at least one front leg elastic member 70 and / or at least one rear leg elastic member 75, the front leg elastic member 70 being arranged adjacent to the front leg edge 44 and the rear leg elastic member 75 being arranged adjacent to the rear leg edge 45. Such leg elastic members 70 and / or 75 help provide additional elastic support around the leg opening 28 to enhance the fit and leak-proofness of the absorbent article 20. Each leg elastic member 70, 75 may comprise a single strip, strand, or elastic filament of elastic material, or each leg elastic member may comprise two, three, or more strips, strands, or elastic filaments of elastic material. Elastic strips, strands, elastic filaments, etc., suitable for disposable absorbent articles are known in the art.

[0053] Optionally, the rear leg elastic member 75 and / or the front leg elastic member 70 extend laterally across the entire width of the absorbent article. Also optionally, for example... Figure 1 and 2 As typically shown, the hind leg elastic member 75 may include a pair of hind leg elastic members, such as first and second hind leg elastic members 76, 77 located on opposite sides of the absorbent composite 50. Similarly, the front leg elastic member 70 may include a pair of front leg elastic members, such as first and second front leg elastic members 71, 72 located on opposite sides of the absorbent composite 50. In a preferred embodiment, for example in Figure 1 and 2 As illustrated in the diagram, each hind leg elastic member 75 may include multiple elastic strands, and / or each front leg elastic member 70 may include multiple elastic strands.

[0054] Optionally, the absorbent composite 50 is attached to and located between the front sheet 40 and the rear sheet 41. The absorbent composite 50 may include a composite structure formed by a liquid-impermeable barrier layer 52 defining a width 53 and a length 51, an absorbent core 54 containing absorbent material, a liquid-permeable liner 55, and / or a crotch elastic member 56.

[0055] As used herein, the term "absorbent material" may refer to fibrous absorbent material, superabsorbent material (SAM), or a combination of both. In some embodiments, the absorbent core 54 may include a layered structure comprising multiple regions of liquid absorbent material, such as fibrous absorbent material and / or superabsorbent material. The absorbent core 54 defines a length 61 and a width 63. Reference will be made below. Figures 3 to 6 Further description of the exemplary absorber core 54 of this disclosure.

[0056] The urinary region, typically indicated by the reference numeral P, for the urinary organ generally facing the wearer, is usually located within the area enclosed by the composite absorbent core 54 of the absorbent composite 50. It is conceivable that the position of the urinary region P within the composite absorbent core 54 of the absorbent composite 50 can vary depending on whether the absorbent article or the article is worn by a girl or a boy. Generally, for boys, the urinary region P will be closer to the front waist edge 32, while for girls, the urinary region P is generally symmetrical with respect to the central transverse axis 25. The urinary region P is known to be configured to absorb bodily fluids, such as urine, excreted by the body. Therefore, a more forward position within the composite absorbent core 54 may be more suitable for boys, while a more central position between the legs may be more suitable for girls. For example, in one embodiment, after absorbing a pre-selected amount of liquid, the urinary region P has a width between approximately one-quarter and approximately one-half of the total length of the composite absorbent core 54.

[0057] It should be understood that the exemplary pant-shaped absorbent article 20 is merely one possible example of an absorbent article that can be used with the absorbent core described in this disclosure. Such an absorbent article 20, as... Figure 1 and 2 As shown, it can be broadly described as an absorbent article formed using a manufacturing process transverse to the machine direction (CD).

[0058] Absorption core

[0059] First combine Figure 3 This describes an absorber core with fluff pulp in the prior art. Specifically:

[0060] exist Figure 3 The text shows the data according to... Figure 2 The cross-sectional view of the absorbent core 54 taken along the transverse section line 3-3 is shown. The absorbent core 54, along the vertical direction 33 (perpendicular to the transverse direction 22 and the longitudinal direction 23), includes both a bottom layer encapsulating material 102 and a top layer encapsulating material 101 disposed around the reinforcing material 104. The bottom layer encapsulating material 102 and the top layer encapsulating material 101 can be formed of any suitable material. At least the top layer encapsulating material 101 can be liquid-permeable and performs well in terms of fluid absorption and wicking. In some embodiments, the bottom layer encapsulating material 102 can also be liquid-permeable and performs well in terms of fluid absorption and wicking.

[0061] The reinforcing material 104 helps provide structural integrity to the absorbent core 54 and facilitates liquid absorption and distribution. Another benefit of the reinforcing material 104 is that it helps stabilize the superabsorbent polymer (SAM) or superabsorbent particles (SAP) embedded within it. Generally, the reinforcing material 104 can comprise a nonwoven material composed of multiple individual fibers or fluff pulp fibers. Suitablely, these fibers are composed of what is commonly referred to as treated fluff material.

[0062] In this document, the term “superabsorbent polymer” (abbreviated as “SAP” or “SAM” in both singular and plural forms) refers to an absorbent material that can absorb at least 10 times its weight in a 0.9% saline solution, as measured by centrifugation retention capacity (CRC) test (EDANA method NWSP 241.0.R2(19)).

[0063] SAP is typically a water-insoluble but water-swellable crosslinked polymer capable of absorbing large amounts of fluid. SAP is in particulate form so that it is flowable in a dry state. Typical particulate SAP is a polyacrylate polymer; however, other polymer materials can also be used. For example, starch-based particulate absorbent polymers, as well as polyacrylamide copolymers, ethylene maleic anhydride copolymers, crosslinked carboxymethyl cellulose, polyvinyl alcohol copolymers, and starch-grafted copolymers of crosslinked polyethylene oxide and polyacrylonitrile can also be used.

[0064] The fluff pulp fibers 104 and superabsorbent polymer 105 can be mixed uniformly or non-uniformly. The fluff pulp fibers have a fixing effect on the superabsorbent polymer 105, maintaining the relative stability of the superabsorbent polymer even under external force. Displacement between the fluff pulp fibers 104 and the superabsorbent polymer 105 is not easily observed, thus preventing localized clumping of the superabsorbent polymer 105 in the absorbent core and subsequent delamination in other areas. Alternatively, thermoplastic short fibers can be added to the mixture of fluff pulp fibers 104 and superabsorbent polymer 105 in the absorbent core 54. The thermoplastic short fibers are uniformly mixed with the fluff pulp fibers 104 and the superabsorbent polymer 105, and the short fibers may be crimped. In a preferred embodiment, after the absorbent core is formed, it is appropriately hot-pressed so that the contact portions of the thermoplastic short fibers in the absorbent core are in a molten bond state.

[0065] Combined Figure 4 The existing composite absorber core is described in detail below:

[0066] like Figure 4 As shown, the composite absorbent core 200 includes a top cover material 201 and a bottom cover material 202. The top cover material 201 is located on the wearer-facing side of the composite absorbent core 200, closest to the absorbent article, and is liquid-permeable. The bottom cover material 202 is positioned on the opposite side. The bottom cover can be liquid-permeable or liquid-impermeable.

[0067] The top wrapping material 201 and the bottom wrapping material 202 can be made of relatively thin and inexpensive materials, such as those commonly used in the production of conventional cores. The top wrapping material 201 and the bottom wrapping material 202 can be, for example, tissue paper (breathable felt or wet-laid web) having a basis weight range of, for example, 5 to 100 g / m², particularly 10 to 40 g / m². The top wrapping material 201 and the bottom wrapping material 202 can also be formed from low-basis-weight nonwoven fiber webs with a basis weight between 5 g / m² and 30 g / m², such as carded nonwovens, spunbond nonwovens (“S”), or meltblown nonwovens (“M”), and laminates of any of these. For example, spun melt polypropylene nonwovens are suitable, particularly nonwovens with a laminated web SMS or SMMS or SSMMS structure and a basis weight range of about 5 g / m² to 20 g / m².

[0068] Preferably, the top layer wrapping material 201 can be wider than the bottom layer wrapping material 202, allowing the excess material to be folded around the longitudinal side edge of the composite absorbent core 200 to form a C-shaped wrapping 203 seal on the top layer, such as... Figure 4As shown. Of course, it is also feasible to design the top wrapping material 201 to have the same width as the bottom layer or a width smaller than the bottom layer.

[0069] Furthermore, such as Figure 4 As shown, a first polymer layer 204 and a second polymer layer 205 are sandwiched between a top coating material 201 and a bottom coating material 202. The first polymer layer 204 is known to be composed of a polymer material consisting of flattened first superabsorbent polymer particles and an adhesive, meaning that the first polymer layer 204 is at least partially and uniformly distributed with the first superabsorbent polymer particles. Similarly, the second polymer layer 205 can be composed of a polymer material consisting of flattened second superabsorbent polymer particles and an adhesive, meaning that the second polymer layer 205 is at least partially and uniformly distributed with the second superabsorbent polymer particles. Preferably, the first and second superabsorbent polymer particles are identical.

[0070] SAP particles can be relatively small in their dry state (their longest dimension is less than 1 mm) and can be generally spherical in shape, but granules, fibers, flakes, spheres, powders, plates, and other shapes and forms are also known to those skilled in the art. Typically, SAP can be in the form of spherical particles. Therefore, the absorbent material can consist of or be substantially composed of SAP distributed within a high-loft nonwoven fabric. The composite absorbent core comprises at least 60% by weight 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 g / m² to 500 g / m².

[0071] First embodiment of a cooling absorbent core

[0072] First combine Figure 5 A first embodiment of a cooling absorbent core, exemplified by an absorbent core containing fluff pulp, is described below. Specifically:

[0073] exist Figure 5 The diagram shows a cross-sectional view of a first embodiment of a cooling absorbent core 300 according to the present invention. The absorbent core 300, along a vertical direction 33 (perpendicular to the transverse direction 22 and the longitudinal direction 23), includes both a bottom layer covering material 302 and a top layer covering material 301 disposed around a reinforcing material 304. The bottom layer covering material 302 and the top layer covering material 301 can be formed of any suitable material.

[0074] The encapsulating materials 301 and / or 302 may comprise natural and / or synthetic fibers, such as, but not limited to, polyester, polypropylene, acetate, nylon, polymeric materials, cellulose materials, and combinations thereof. In various embodiments, the encapsulating materials 301 and / or 302 may be hydrophilic. In various embodiments, the encapsulating materials 301 and / or 302 may be hydrophobic and may be treated in any manner known in the art to make them hydrophilic.

[0075] Some exemplary suitable materials for wrapping materials 301 and / or 302 include tissue materials, spunbond and / or meltblown materials (e.g., spunbond-meltblown and spunbond-meltblown-spunbond materials), jet-blown web materials, materials (which are a class of materials commercially available from Kimberly-Clark World Wide, Inc.), air-laid web materials, breathable bonded carded webs (TABCW), and co-forming materials. Wrapping materials 301, 302 may have a basis weight ranging from about 5 grams per square meter (g / m²) to about 25 grams per square meter.

[0076] From a productivity perspective, the fibers constituting the wrapping material are preferably continuous filaments, and more preferably contain long fibers. For example, a fiber web can be made from continuous filaments melt-spun by spunbonding (S) and then bonded together to form a nonwoven fabric. Alternatively, a fiber web melt-spun by meltblowing (M) can be blown onto the fiber web formed by spunbonding (S) to form a laminated fiber web. From a productivity perspective, the laminated state can be 2 layers SS, 3 layers SSS, 4 layers SSSS, or it can be laminated in the manner of spunbond-meltblown SM, spunbond-meltblown-spunbond SMS, SMMS, or SMSMS.

[0077] The joining of these fiber webs can be achieved through bonding with adhesives, bonding using low-melting-point fibers or composite fibers, melt bonding by applying hot-melt adhesive during the formation of the fiber web, or bonding by interlacing fibers using methods such as needle punching and water jetting. From the viewpoint of high-speed production, partial hot-pressing is preferred. For example, the fiber webs can be joined by passing them through heated embossing / flattening rollers that can impart needle-like, elliptical, diamond-shaped, or rectangular joining points. From the viewpoint of maintaining strength and flexibility, the hot-pressing area ratio in partial hot-pressing is preferably 5 to 40%, more preferably 5 to 25%.

[0078] It is feasible that the top layer wrapping material 301 may be an SSSS, SMS, or hot-air nonwoven fabric with a basis weight between about 7 g / m² and about 20 g / m². In other feasible embodiments, the top layer wrapping material 301 may be a co-formed, jet-sprayed, or air-laid material with a basis weight between about 5 g / m² and about 25 g / m². According to other specific embodiments of this disclosure, the bottom layer wrapping material 302 may be a co-formed material, jet-sprayed material, air-laid material, or material with a basis weight between about 30 g / m² and about 50 g / m².

[0079] According to another embodiment, the bottom wrapping material 102 may include a higher void volume than the top wrapping material 301. For example, the top wrapping material may be SSSS, SMS, or hot-air nonwoven fabric with a basis weight between about 7 g / m² and about 20 g / m², while the bottom wrapping material 102 is a co-forming material, jet-blown material, air-blown material, or material with a basis weight between about 30 g / m² and about 50 g / m². Additionally, the bottom wrapping material 102 may include materials containing natural absorbent materials (such as pulp fibers), while the top wrapping material 301 includes materials that do not contain natural absorbent materials. For example, the bottom wrapping material 102 may include a co-forming material with a basis weight between about 30 g / m² and about 50 g / m², while the top wrapping material 301 includes SSSS, SMS, or hot-air nonwoven fabric with a basis weight between about 7 g / m² and about 20 g / m², or jet-blown material, air-blown material, or material with a basis weight between about 30 g / m² and about 50 g / m².

[0080] The fluff pulp fibers 304 and superabsorbent polymer 305 used as reinforcing material layers can be mixed uniformly or non-uniformly. Specifically, when the fluff pulp fibers 304 are mixed with the superabsorbent polymer particles 305, these particles 305 will be formed by the cross-linking and connection of the elongated fluff pulp fibers 304 to form a three-dimensional network, such as... Figure 5 As can be seen, the reticulated fluff pulp fibers 304 extend or are oriented in a substantially random manner throughout the three-dimensional network. As used herein, the reticulated fluff pulp fibers 304 can be considered to extend substantially throughout the entire three-dimensional space, wherein the reticulated fluff pulp fibers 304 extend and mix with the majority or super-major portion of the individual superabsorbent particles 305. Consequently, the superabsorbent polymer particles 305 are also disposed throughout the three-dimensional network and are immobilized by contact with one or more reticulated fluff pulp fibers 304.

[0081] As a result, the fluff pulp fibers 304 have a fixing effect on the superabsorbent polymer 305, maintaining the relative stability of the superabsorbent polymer even under external force, and displacement between the fluff pulp fibers 304 and the superabsorbent polymer 305 is not easily observed. The reinforcing material shown as a three-dimensional mesh network has a first length D1, for example, of 3 to 8 cm.

[0082] Different from Figure 3 The core 100 with fluff pulp shown in the figure is in Figure 5 The absorber core 300 shown provides consumers with temperature regulation and energy storage functions. A detailed description follows:

[0083] exist Figure 5 The absorbent core 300 also includes at least one side of the top covering material 301, preferably above the top surface, a temperature-regulating material layer 308. In this invention, the temperature-regulating material layer 308 can be a microencapsulated phase change material or a Micro PCM. The microencapsulated phase change material can have a phase change temperature in the range of 28 to 36 degrees Celsius, preferably 28 to 33 degrees Celsius, to provide a cooling sensation.

[0084] In this paper, phase change materials (PCMs) refer to materials that absorb or release a large amount of energy in the form of latent heat between solid-solid or solid-liquid phases without significant temperature change. In practical applications, PCMs suffer from problems such as easy leakage, corrosion, phase separation, and volume changes. PCM microcapsule materials utilize microcapsule technology to encapsulate PCMs, using a relatively stable substance as the shell. This achieves permanent solidification and encapsulation of the PCM core, preventing leakage and ensuring temperature stability during the phase change process. Depending on the phase transition temperature of the core material, PCM microcapsule materials possess the ability to absorb and release heat within a certain temperature range.

[0085] In this document, the phase change material may be, for example, a n-alkanes, and has a phase change temperature in the range of 28 to 36 degrees Celsius, preferably 28 to 33 degrees Celsius. Meanwhile, the capsule material of the microcapsule may be a non-water-soluble material known to those skilled in the art. The capsule material may be a non-water-soluble polymer material, such as polymethyl methacrylate, polystyrene, polyethylene, polyurethane, urea / formaldehyde, melamine / formaldehyde, or an inorganic material, such as calcium carbonate, silica, or sodium silicate, as known to those skilled in the art. Natural polymers such as gelatin may also be used as shell materials, provided they have low water solubility and a melting point above the temperature range of PCM activity.

[0086] Examples of commercial manufacturers of microencapsulated PCMs suitable for wearable or energy storage applications within the human comfort temperature range include Microtek Laboratories (US) or Beijing Yutian Phase Change Energy Storage Technology Co., Ltd.

[0087] When the top coating material 301 is a spunbond fiber web or a hot-air fiber web, the commercially available microencapsulated phase change material can be diluted with water to obtain a microencapsulated phase change solution with a mass concentration of 5% to 30%. Then, the top coating material 301 is immersed in the microencapsulated phase change solution for 10 to 60 minutes, followed by padding in a padding machine with a roll-off rate of, for example, 80% to 100%, and then dried at 25 to 140°C, thus attaching the microencapsulated phase change material to the temperature-regulating material layer 308 of the top coating material 301.

[0088] Here, taking a spunbond web with SSSS as the top layer wrapping material 301 as an example, it is immersed in a microcapsule phase change solution with a wettability of 30 to 80 grams per square meter and a mass concentration of 5% to 30%, wherein the microcapsule phase change solution is controlled within the range of 26 to 34 degrees Celsius. Then, the immersed top layer wrapping material 301 is rolled in a rolling mill until the wettability is within the range of 8 to 20 grams per square meter, preferably 10 grams per square meter. Assuming a length of 5000 meters for the top layer wrapping material 301, the weight of the microcapsule phase change solution adhering to a single sheet can be calculated to be within the range of 0.25 to 0.5 grams, preferably within the range of 0.26 to 0.46 grams. It should be noted that selecting plain weave hot-air nonwoven material or 3D nonwoven hot-air material as the top layer wrapping material 301 is also feasible.

[0089] Alternatively, the microcapsule phase change solution can be applied to the top surface of the top coating material 301 by printing. Here, the printing can be contact-type, such as flexographic printing, screen printing, offset printing, or rotary gravure printing, or non-contact-type, such as digital inkjet printing, which can be continuous or on-demand dripping, forming intermittent dripping through piezoelectric, thermal activation, or other types of techniques.

[0090] Based on experience, the normal skin temperature in the groin area is approximately 31-34°C. However, in these areas, temperatures can rise above normal body temperature when a person moves vigorously (e.g., during exercise), is in hot environments, or in certain climates. Thus, the temperature varies between different areas of the skin and body. For example, due to its enclosed location, the skin in the genital area closest to the thighs may have a temperature several degrees higher than the skin on the lower thighs. Sweat may initially raise the temperature and then lower it as the heat from evaporation cools the sweat fluid. This is balanced by the temperature-regulating material layer 308.

[0091] Of particular importance is that when wearing an absorbent product with a cooling absorbent core 300, in the center of the crotch area of ​​the cooling absorbent core 300, warm fluids such as urine or menstrual blood will cause the adjacent skin to warm up. The microencapsulated temperature-regulating material layer 308 with a phase change temperature range corresponding to the warm body fluid can help balance temperature changes to achieve increased wearing comfort.

[0092] As a further preferred option, in Figure 5 The absorbent core 300 also includes a temperature-regulating material layer located between the top covering material 301 and the reinforcing material layer. This temperature-regulating material layer has a width d1 of approximately 2 to 6 cm. This temperature-regulating material layer includes viscose filaments 307 and temperature-regulating particles 306 mixed within the viscose filaments 307. The viscose filaments 307 in the temperature-regulating material layer can be provided from a variety of different fibers, as is known in the art. For example, the viscose filaments 307 may include adhesive fibers, absorbent fibers, binders (including binder fibers), and combinations thereof. Thus, the temperature-regulating particles 306 are preferably embedded within the viscose filaments 307 to limit their dislodgement or loss during the manufacture and / or wearing of the trousers.

[0093] It should be noted that although the example of viscose filament 307 illustrates a feasible method for fixing the temperature-changing particles 306 within the absorber core 300, this is not the only feasible method. Those skilled in the art will understand that using short fibers or a mixture of filaments and short fibers as a fiber carrier is equally feasible. Furthermore, it is also feasible to fix the temperature-changing particles 306 or microencapsulated phase change material directly into the absorber core 300 using an adhesive without a fiber carrier.

[0094] The temperature-changing particles 306 can be a combination of temperature-changing materials with different dissolution rates, such as sugars and salts, in granular form, preferably xylitol particles. These particles are fixed within the viscose filaments 307. The total amount of temperature-changing particles 306 added to the temperature-changing material layer is in the range of 2 to 12 grams, preferably 6 to 10 grams, and most preferably 10 grams. The particle diameter of these temperature-changing particles 306 is between 200 and 1000 micrometers, preferably 400 millimeters. The addition of these temperature-changing particles 306 can be achieved by means of a feeder or a feeding nozzle.

[0095] Therefore, the cooling absorbent core 300 according to this invention not only enhances the cooling sensation during wear by means of the temperature-regulating material layer 308 located above the top covering material 301, but also, when the cooling absorbent core 300 is placed near the wearer's groin area and comes into contact with menstrual blood or urine, the heat absorption effect of the aforementioned temperature-changing particles 306 allows the wearer to clearly feel a cooling sensation. Using a temperature sensor, it can be observed that the addition of the aforementioned temperature-regulating material layer 308 effectively reduces the temperature of the skin near the groin area by 2 to 6°C.

[0096] It is also worth noting that, according to this embodiment, it is advantageous to place the temperature-changing particles 306 within the cooling absorber core 300, along the vertical direction 33, immediately adjacent to the top coating material 301. Without adhering to any particular theory, it is believed that positioning the temperature-changing particles 306 between the top coating material 301 and the superabsorbent polymer 305, which are arranged close to the skin of the human body (rather than between the superabsorbent polymer 305 and the bottom coating material 302, or mixing or doping them with the superabsorbent polymer 305), can achieve a more significant temperature reduction. This contrasts sharply with and is significantly different from the existing teachings in the art—that a coolant, including the temperature-changing particles, is incorporated into the superabsorbent polymer within the absorber core.

[0097] Second embodiment of a cooling absorbent core

[0098] Next, combine Figure 6 A second embodiment of a cooling absorbent core, using a composite absorbent core as an example, is described below:

[0099] exist Figure 6 The diagram shows a cross-sectional view of a second embodiment of a cooling absorbent core 400 according to the present invention. The absorbent core 400 includes a top covering material 401 and a bottom covering material 402. The top covering material 401 is located on the side of the composite absorbent core 400 intended to be placed closest to the absorbent article and facing the wearer, and the top covering material 401 is liquid-permeable. The bottom covering material 402 is positioned on the other side. The bottom layer can be liquid-permeable or liquid-impermeable. The top covering material 401 and bottom covering material 402 shown herein may be the same material as or have the same or similar properties as the top covering material 301 and bottom covering material 302 in the first embodiment, such as, but not limited to, spunbond web, hot-air web, air-laid bonded carded fiber web, or thermally bonded carded fiber web.

[0100] and Figure 5Similarly, the top layer wrapping material 401 can be wider than the bottom layer wrapping material 402, allowing the excess material to be folded around the longitudinal side edges of the composite absorbent core 400 to form a C-shaped wrapping 403 seal on top of the top layer, such as... Figure 6 As shown. Of course, it is also feasible to design the top wrapping material 401 to have the same width as the bottom layer or a width smaller than the bottom layer.

[0101] Furthermore, such as Figure 6 As shown, a first polymer layer 404 and a second polymer layer 405 are sandwiched between the top layer encapsulating material 401 and the bottom layer encapsulating material 402. The first polymer layer 404 is known to consist of a polymer material composed of laid-out first superabsorbent polymer particles and an adhesive, meaning that the first polymer layer 404 is at least partially and uniformly distributed with the first superabsorbent polymer particles. Similarly, the second polymer layer 405 can consist of a polymer material composed of laid-out second superabsorbent polymer particles and an adhesive, meaning that the second polymer layer 405 is at least partially and uniformly distributed with the second superabsorbent polymer particles. Preferably, the first and second superabsorbent polymer particles are identical, and they constitute at least 60% by weight of the total weight of the absorbent core 400, wherein the basis weight of these superabsorbent polymer particles is 100 gsm to 500 gsm. The first and second polymer layers here have a second length D2, for example, of 3 to 8 cm.

[0102] Different from Figure 4 The composite absorber core 200 shown in the figure, in Figure 6 The absorber core 400 shown also provides consumers with temperature regulation and energy storage functions. Details are as follows:

[0103] exist Figure 6 The absorbent core 400 also includes a temperature-regulating material layer 408 located above at least one side, preferably the top side, of the top covering material 401. In this invention, the temperature-regulating material layer 408 may be a microencapsulated phase change material or a Micro PCM. The microencapsulated phase change material may have a phase change temperature in the range of 28 to 36 degrees, preferably 28 to 33 degrees, to provide a cooling sensation.

[0104] exist Figure 6 In the second embodiment, the material of the temperature-regulating material layer 408 and the manner in which it is applied to at least one side of the top covering material 401 can be similar to... Figure 5 The first embodiment is the same.

[0105] Specifically, taking a spunbond web with SSSS as the top layer wrapping material 401 as an example, it is immersed in a microcapsule phase change solution with a wettability of 30 to 80 grams per square meter and a mass concentration of 5% to 30%, wherein the microcapsule phase change solution is controlled within the range of 26 to 34 degrees Celsius. Then, the immersed top layer wrapping material 401 is rolled in a rolling mill until the wettability is within the range of 8 to 20 grams per square meter, preferably 10 grams per square meter. Assuming a length of 5000 meters for the top layer wrapping material 401, the weight of the microcapsule phase change solution adhering to a single sheet can be calculated to be within the range of 0.25 to 0.5 grams, preferably within the range of 0.26 to 0.46 grams. It should be noted that selecting plain weave hot-air nonwoven material or 3D nonwoven hot-air material as the top layer wrapping material 401 is also feasible.

[0106] As a result, when wearing an absorbent article with a cooling absorbent core 400, in the center of the crotch area of ​​the cooling absorbent core 400, warm fluids such as urine or menstrual blood will cause the adjacent skin to warm up. The microencapsulated temperature-regulating material layer 408 with a phase change temperature range corresponding to the warm body fluid can help balance temperature changes to achieve increased wearing comfort.

[0107] As a further preferred option, in Figure 6 The absorber core 400 also includes a temperature-variable material layer located between the top coating material 401 and the reinforcing material layer. This temperature-variable material layer has a width d2 of approximately 2 to 6 centimeters. This temperature-variable material layer comprises viscose filaments 407 and temperature-variable particles 406 mixed within the viscose filaments 407. Figure 6 In the second embodiment, the materials of the viscose filaments 407 in the temperature-changing material layer and the temperature-changing particles 406 mixed within the viscose filaments 407 can be the same as those in the second embodiment. Figure 5 The first embodiment is the same. Here, the total amount of temperature-changing particles 406 added to the temperature-changing material layer is in the range of 2 to 12 grams, preferably 6 to 10 grams, and most preferably 10 grams. Here, the particle diameter of these temperature-changing particles 406 is between 200 and 1000 micrometers, preferably 400 millimeters. The addition of these temperature-changing particles 406 can be achieved by means of a feeder or a feeding nozzle.

[0108] It should be noted that although the example of viscose filament 407 illustrates a feasible method for fixing the temperature-changing particles 406 within the absorber core 400, this is not the only feasible method. Those skilled in the art will understand that using short fibers or a mixture of filaments and short fibers as a fiber carrier is equally feasible. Furthermore, it is also feasible to fix the temperature-changing particles 406 or microencapsulated phase change material directly to the absorber core 400 using an adhesive without a fiber carrier.

[0109] Therefore, the cooling absorbent core 400 according to this invention not only enhances the cooling sensation during wear by means of the temperature-regulating material layer 408 located above the top covering material 401, but also, when the cooling absorbent core 400 is placed near the wearer's groin area and comes into contact with menstrual blood or urine, the heat absorption effect of the aforementioned temperature-changing particles 406 allows the wearer to clearly feel a cooling sensation. Using a temperature sensor, it can be observed that the addition of the aforementioned temperature-regulating material layer 408 actually reduces the temperature of the skin near the groin area by 1 to 3°C.

[0110] What particularly surprised the inventor of this utility model was that, Figure 7 As shown, the second embodiment of the cooling absorbent core according to this utility model has superior structural integrity compared with the existing composite absorbent core and has a better cooling or temperature reduction effect at the same amount compared with the first embodiment.

[0111] Specifically, for composite absorber cores without fluff pulp (i.e., 100% SAP), the integrity of these composite absorber cores can be assessed using a pre-treated core fracture test. As an example, the process for assessing structural integrity includes:

[0112] 1. Identify a damage point on the dried absorber core sample.

[0113] 2. While the simulated sample is still dry, i.e. before user activity, the sample is pretreated by hanging.

[0114] 3. Moisten the sample at the identified lesion site with physiological saline.

[0115] 4. Wait for the brine to be absorbed into the core.

[0116] 5. Repeat the suspension and movement simulation until the core breaks. The result is expressed as the number of movements before breakage.

[0117] Here, core breakage refers to separation caused by gravity, movement, and / or the weight of the superabsorbent polymer (SAP) when wetted. Core integrity, on the other hand, refers to the ability of the core substrate to remain a single unit, thereby preventing leakage caused by core breakage.

[0118] exist Figure 7In the first example, the rightmost composite absorbent core 400 is 100% SAP. Six grams of temperature-sensitive particles 406, such as xylitol, are added to it. Surprisingly, the number of core fractures reaches 449 (corresponding to the left half of the core) or 497 (corresponding to the right half). In contrast, in the second comparative example from the right, where the composite absorbent core 400 is 100% SAP, adding 2 grams of temperature-sensitive particles 406, such as xylitol, results in only 77 fractures (corresponding to the left half of the core) or 110 fractures (corresponding to the right half). This demonstrates that the addition of temperature-sensitive particles 406, such as xylitol, does not have a linear effect on the structural integrity of the composite absorbent core 400, rather than resulting in an unexpected technical effect, thus achieving highly beneficial technical results for the absorbent core of this invention.

[0119] exist Figure 8 The beneficial technical effects of the first and second embodiments of the present invention are shown in comparison views.

[0120] like Figure 8 As can be seen from the view of the first embodiment on the right, compared with the top layer wrapping material 101 without the application of the temperature-regulating material layer 308, the average temperature of the absorbent core 300 in the first embodiment is reduced by 2 to 6 degrees Celsius during the 0-10 seconds period. The most significant cooling effect is achieved by applying the temperature-regulating material layer 308 with microcapsule solution to the 3D hot air fiber web. Applying the temperature-regulating material layer 308 with microcapsule solution to SSSS spunbond fiber web or plain weave hot air fiber web also has a good cooling or cooling effect.

[0121] Furthermore, for Figure 8 As can be seen from the view of the second embodiment on the left, compared with the top layer wrapping material 101 without or with the temperature-regulating material layer 408, the average temperature of the absorbent core 400 in the second embodiment is reduced by 2 to 6 degrees Celsius during the 0-60 seconds period. That is, the second embodiment has a better cooling or temperature reduction effect with the same amount of additive compared with the first embodiment. The most significant cooling effect is achieved by applying the temperature-regulating material layer 408 with microcapsule solution to the SSSS spunbond web. Applying the temperature-regulating material layer 408 with microcapsule solution to the 3D hot air web or plain weave hot air web also has a good cooling or cooling effect.

[0122] As can be seen from the above, the absorbent core in the first and second embodiments can provide consumers with temperature regulation and energy storage functions without affecting the size or absorption function of the absorbent core. This allows absorbent articles with absorbent cores according to this invention to eliminate the discomfort of stuffiness and dampness experienced by wearers in hot weather, thereby effectively meeting consumer needs that have not been met by the market in the background art described herein. Particularly surprising is that some embodiments of this invention possess satisfactory structural integrity, which is highly advantageous in certain respects.

[0123] It should also be noted that although the above description uses trouser-type absorbent articles as an example to illustrate the application of the absorbent core 300 or 400 of this utility model, those skilled in the art will understand that the absorbent core 300 or 400 of this utility model can also be used in other types of absorbent articles such as open diapers and menstrual products, and these applications are also covered within the scope of protection of this utility model.

[0124] 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.

[0125] 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 range of functionally equivalent values ​​around that value. For example, a dimension disclosed as “40 mm” is intended to represent “approximately 40 mm”.

[0126] 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.

[0127] 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.

[0128] When describing elements of the present invention or their preferred embodiments(s), the articles "a," "an," "the," and "the" are intended to indicate the presence of at least one element. The terms "comprising," "including," and "having" are intended to be inclusive and mean that additional elements may be present in addition to the listed elements. Many modifications and variations may be made to the present invention without departing from the spirit and scope thereof. Therefore, the above embodiments are not intended to limit the scope of the present invention.

Claims

1. An absorbent core body with a cool feeling, the absorbent core body extending in a transverse direction and a longitudinal direction and having a thickness in a vertical direction perpendicular to the transverse direction and the longitudinal direction, characterized by, The absorber core includes: - A liquid-permeable top layer wrapping material, wherein the top layer wrapping material is a spunbond web or a hot-air web; - Bottom layer wrapping material; - A reinforcing material between the top coating material and the bottom coating material, wherein the reinforcing material comprises fluff pulp fibers and superabsorbent polymer particles therein, wherein the superabsorbent polymer particles are mixed with the fluff pulp fibers before being deposited into either the top coating material or the bottom coating material, the fluff pulp fibers forming a three-dimensional network comprising a mesh-like fluff pulp fiber, and wherein the superabsorbent polymer particles are fixed within the mesh-like network, the mesh-like fluff pulp fibers and the superabsorbent polymer particles extending through a three-dimensional space defined by the mesh-like fluff pulp fibers and the superabsorbent polymer particles, and wherein the mesh-like fluff pulp fibers extend in a random orientation throughout the three-dimensional space; - A temperature-regulating material layer located on at least one side of the top-layer encapsulating material, wherein the temperature-regulating material layer contains microencapsulated phase change material, wherein the temperature-regulating material layer has a phase change transition temperature of 28 to 36 degrees.

2. A cooling absorbent core, said absorbent core extending in a transverse and longitudinal direction and having a thickness in a vertical direction perpendicular to said transverse and longitudinal directions, characterized in that, The absorber core includes: - A liquid-permeable top layer wrapping material, wherein the top layer wrapping material is a spunbond web or a hot-air web; - Bottom layer wrapping material; - A reinforcing material between the top wrapping material and the bottom wrapping material, wherein the reinforcing material comprises a first polymer layer and a second polymer layer located below thereunder, wherein the first polymer layer is composed of polymeric material of a first superabsorbent polymer particle laid flat and an adhesive, and the second polymer layer is composed of polymeric material of a second superabsorbent polymer particle laid flat and an adhesive. - A temperature-regulating material layer located on at least one side of the top-layer encapsulating material, wherein the temperature-regulating material layer contains microencapsulated phase change material, wherein the temperature-regulating material layer has a phase change transition temperature of 28 to 36 degrees.

3. The cool-feeling absorbent core according to Claim 1 or 2, wherein It also includes a temperature-variable material layer located between the top coating material and the reinforcing material, wherein the temperature-variable material layer has a width of approximately 2 to 6 centimeters and includes temperature-variable particles with a diameter between 200 and 1000 micrometers, wherein the temperature-variable particles are xylitol particles or microencapsulated phase change material particles.

4. The cool-feeling absorbent core according to Claim 1 or 2, wherein The top layer wrapping material is a multi-layer nonwoven fabric with a basis weight between 7 g / m² and 20 g / m², consisting of 2, 3, and 4 layers of spunbond web.

5. The cool-feeling absorbent core according to Claim 1 or 2, wherein The top layer wrapping material is a plain weave or 3D hot air nonwoven fabric with a basis weight between 7 grams per square meter and 20 grams per square meter.

6. The cool-feeling absorbent core according to claim 3, wherein The total amount of the temperature-changing particles added to the temperature-changing material layer is in the range of 2 to 12 grams.

7. The cool-feeling absorbent core according to claim 6, wherein The total amount of the temperature-changing particles added to the temperature-changing material layer is approximately 6 grams.

8. The cool-feeling absorbent core according to Claim 1 or 2, wherein The wettable dry weight of the microencapsulated phase change material in the top layer of the encapsulating material is in the range of 8 to 20 grams per square meter.

9. An absorbent article, wherein the absorbent article extends in a longitudinal direction and a transverse direction, characterized by include: Body side lining; Outer cladding; An absorbent core disposed between the body side lining and the outer covering, wherein the absorbent core is a cooling absorbent core according to any one of claims 1 to 8.

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