Reusable chassis with special frame for disposable absorbent pads

Abstract

The present invention relates to a reusable sanitary article base comprising a pocket for accommodating a replaceable absorbent pad. The base includes a liquid absorbent region that is particularly adapted to receive body secretions and further transfer them onto a replaceable absorbent pad.

Description

Technical Field

[0001] The present invention relates to a reusable sanitary article base, which includes a pocket for accommodating a replaceable absorbent pad. The base includes a liquid absorption area, which is particularly suitable for receiving body exudates and further transferring them to the absorbent pad. Background Art

[0002] In addition to washable cloth diapers, two-piece diaper systems have long been used, which include a reusable and washable outer layer and a disposable insert. In the past few decades, disposable diapers have significantly improved the ease of use and liquid handling performance, not only for infants, but also for incontinent adults and menstruating women, which even makes the wearer's skin healthier during extended wearing time. Especially for incontinent adults and menstruating women, absorbent pads are widely used for lower liquid handling requirements, such as mild to moderate incontinence or lower menstrual volume, whereby such pads are usually inserted into conventional underwear, optionally attached thereto by a releasable adhesive, or inserted into elastic pants (mostly in hospitals or nursing institutions). Especially for people with limited mobility, caution during wearing and convenience of replacement are very important. However, with the increase of environmental awareness, disposable products are under scrutiny for using non-renewable resources and / or increasing carbon footprint (including handling used products) throughout the life cycle.

[0003] It is also known to design products, in particular for menstrual products or very light incontinence products, which are washable, with a slightly increased absorbency in the crotch area in order to accommodate small amounts of secretions. Such products may contain a hydrophilic fiber wadding in the crotch area, optionally in combination with a thin protective coating or film, to reduce the risk of soiling clothing. Such products can be washed and reused many times, thus also allowing the use of more expensive materials, such as textile extensible materials, such as knitted cotton, as is known in traditional underwear, or elastic materials, such as rubber, preferably synthetic rubber, or the synthetic elastic material known as LYCRA. TM )wait.

[0004] However, the use of such products is limited for several reasons: firstly, the fact that the product must be washed immediately after use, at least roughly rinsed and dried. Otherwise, if it remains damp, it will not only produce an unpleasant odor when stored damp, but also breed bacteria, which will require more stringent washing conditions. In order to avoid bacterial growth, textiles treated with biocides are usually used as such washable products, which has the disadvantage of potentially having a negative impact on skin health by damaging the natural bacterial environment of the skin. In addition, if the biocide is partially washed off during the product washing process or after treatment, it will also have a negative impact on the environment.

[0005] Furthermore, other additives, such as the mentioned bacterial growth inhibitors, or odor reducing agents, or odor masking agents, are easily removed during the washing process or at least their efficiency is reduced and they cannot be used effectively. This is particularly relevant for superabsorbent materials, since it is well known that the absorption capacity of superabsorbent materials exceeds the absorption capacity of hydrophilic fillers, which should not show a high liquid absorption capacity, otherwise drying will also become inefficient. Such superabsorbent materials not only dry very slowly, but also even lose their absorption properties during washing.

[0006] Furthermore, the difficulties of changing products while out and about are the same as those described above for individual items, further exacerbated by the need to store the loaded product until returning home again.

[0007] Furthermore, with regard to environmental compatibility, reusable and washable products require increased use of energy (e.g., for running equipment, heating laundry water, and treating wastewater) and use of chemicals (e.g., detergents and water treatment agents), making the comparison of washable and fully disposable products in terms of “environmental compatibility” complex and with no undisputed conclusions either way.

[0008] In view of the above considerations, it would be advantageous if a wearable absorbent article could be obtained that provides the advantages provided by both disposable and reusable diapers while reducing the disadvantages of each of these alternatives. It would also be advantageous if a construction that could simplify the manufacturing process and / or reduce costs was provided. Several methods are known to improve the usefulness, cost, and environmental compatibility of a system that combines a more efficient disposable absorbent core with a functional reusable chassis.

[0009] US6142983 discloses a disposable absorbent article having an outer cover, an absorbent base and an absorbent support member, the absorbent support member being configured to keep the absorbent base in close contact with the wearer's body during use. US20060247599 relates to an absorbent garment having a garment-like outer cover and an absorbent assembly therein. WO1995010992A1 discloses a diaper assembly comprising a washable garment outer cover and a reusable moisture-proof sheet located on the inner surface side of the garment.

[0010] US3489149 (Larson) describes a reusable and washable menstrual panty having a pocket in the crotch portion for an optional absorbent insert or pad, wherein the portion of the pocket facing the user is formed by a first hydrophobic but moisture permeable layer facing the wearer for improved skin drying and a hydrophilic layer having a tendency to retain moisture for use without an insert pad, and facing the insert (if present) or panty material. The insert may be disposable.

[0011] US2021 / 0100698 (P&G, Langdon) describes a one-piece or two-piece article in which the chassis portion exhibits special stretch properties, allowing good adaptation to the body contours, especially in the crotch area.

[0012] In EP2376046, a wearable absorbent article is described which is worn by a wearer about the lower torso and comprises a reusable chassis adapted to house an absorbent insert therein. The chassis comprises an insert fastener component and the absorbent insert comprises a pair of elasticized upright sleeves.

[0013] Following these developments, the commercially available Pampers (trademark PAMPERS) hybrid design provided a baby diaper with a reusable base and a disposable absorbent core - just like the original diapers, but with more modern materials, especially superabsorbent materials.

[0014] Co-pending application EP22164271 (Pelz, unpublished) describes a system having an article base adapted to accommodate an absorbent core on its outer surface to facilitate replacement of the absorbent core when loaded, finds a way to improve positioning and also solves the problem of replacing a loaded absorbent core.

[0015] However, these methods currently cannot balance user-friendliness, functionality and the amount of minimized processed materials. Fully disposable articles can well meet user-friendliness and functionality, but cannot solve the increased aversion to waste generation. In addition, customization (i.e., adapting the characteristics of the article to the different requirements or preferences of the user) is difficult to meet such articles because the choice of materials used to design the product is limited by the cost of materials, which needs to be limited for disposable products. Fully reusable (and therefore washable) systems either have very limited absorption capacity or require a large amount of absorbent material, resulting in bulky and uncomfortable. In addition, the choice of materials is limited to materials suitable for the washing step. In particular, superabsorbent materials and additives that control pH to benefit the skin and odor control / absorption additives are mostly incompatible with the washing process due to their interaction with water and detergents.

[0016] The present invention addresses the need for a product that meets the requirements for minimal disposable materials while performing well even at higher liquid loads and having customizable features and functions that are incompatible with washing requirements. Summary of the invention

[0017] In a first aspect, the present invention is a reusable article chassis for wear on the lower torso of a wearer, and in a second aspect, the present invention is a sanitary article system comprising such a reusable article chassis and an absorbent pad.

[0018] The article base has a user-facing surface and an opposite outer surface, and includes at least one liquid absorption zone adapted to cover the open area of ​​the secretion release body, the liquid absorption zone including a base fluid handling auxiliary material, the base fluid handling auxiliary material, when tested on the surface, adapted to face the user, presents

[0019] - Centrifugal capacity is

[0020] less than about 10.0 g / g or less than about 5.0 g / g or less than about 3.0 g / g,

[0021] and optionally greater than about 0.5 g / g, or greater than about 1.0 g / g,

[0022] When tested according to the "Absorbent Capacity - Centrifugal Capacity" test;

[0023] The "Liquid Flow Rate" is greater than about 0.4 g / min, preferably greater than about 0.6 g / min, and more preferably greater than about 0.8 g / min, as described herein, when tested according to the "Liquid Flow Resistance Test."

[0024] The article also includes a main chassis region preferably surrounding at least one liquid absorbent region and an optional transition region connecting the absorbent region and the main chassis region, and an optional top sheet material covering the absorbent region. The article includes at least one pocket covering at least a portion of the at least one absorbent region, the pocket including a pocket opening adapted to receive and position an absorbent pad in liquid contact with the liquid absorbent region. The pocket is accessible to a user in both the pre-use configuration and the in-use configuration.

[0025] Optionally, the main base, (one or more) absorption zones and transition zone (if present) are substantially composed of materials and structural elements that can be washed at least 30 times, preferably at least 60 times at at least 40°C, preferably at least 60°C, more preferably at least 90°C.

[0026] The reusable item base may also include one or more elements selected from the group consisting of:

[0027] a) leg sleeves, preferably extending from the base to the opposite ends thereof by more than 1 cm, preferably more than 2 cm, more preferably more than 3 cm;

[0028] b) an openable side closure element in a closed configuration;

[0029] c) including exhibiting a water vapor transmission rate (MVTR) of at least 5000 g / m when tested in accordance with the "Water Vapor Transmission Rate by Measuring the Humidity Rise Time Lyssy / EDANA" Part 2 NWSP 070.6.R0 (15) 2 / 24h, preferably greater than 8000g / m 2 / 24h materials;

[0030] ) includes a surface area of ​​20 cm when measured at 125 Pa according to ASTM D 737-18 2 The air permeability is at least 0.2m 3 / (m 2 *s), preferably greater than 1m 3 / (m 2 *s) materials;

[0031] e) at least one of the main chassis and the transition region comprises a material that exhibits a vertical capillary wicking height of less than 10 mm, preferably less than 5 mm, more preferably substantially non-wicking, according to AATCC 197, 2018 Edition, 2018 - Test Method for Vertical Wicking of Textiles, optionally waterproof or liquid impermeable;

[0032] f) a circumferential extensibility of at least 10%, preferably 50%, more preferably 100% of the unstretched circumference at least in the waist region;

[0033] g) a circumferentially seamless material, optionally a seamless circular knit material, at least in the waist region of the chassis article;

[0034] h) the one or more absorption zones comprise a base fluid handling auxiliary material satisfying one or more properties selected from the group consisting of:

[0035] h1) “Horizontal fluid transfer”

[0036] greater than about 18 g, preferably greater than about 20 g, more preferably greater than about 22 g after 5 minutes;

[0037] After 10 minutes, it is greater than about 30 g, preferably greater than about 34 g, and more preferably greater than about 37 g;

[0038] After 20 minutes, it is greater than about 68 g, preferably greater than about 73 g, and more preferably greater than about 78 g;

[0039] h2) “Vertical fluid transfer”

[0040] greater than about 4.0 g, preferably greater than about 5.0 g, more preferably greater than about 5.5 g after 1 minute;

[0041] After 3 minutes, it is greater than about 8.0 g, preferably greater than about 9.0 g, and more preferably greater than about 10.0 g;

[0042] After 15 minutes, it exceeded about 18.0 g;

[0043] h3) a "vertical wicking height" greater than about 19 cm, preferably greater than about 20 cm, more preferably greater than about 22 cm;

[0044] h4) Vertical fluid absorption

[0045] greater than about 2.0 g, preferably greater than about 5.5 g at 3 minutes;

[0046] greater than about 6.0 g at 5 minutes,

[0047] wherein all characteristics are described by parameters determined from the tests described herein;

[0048] i) the pocket comprises a liquid-impermeable material on the surface opposite to the absorbent layer;

[0049] j) The materials of the main base region and the absorbent region exhibit at least a 10% difference in

[0050] - Repeated liquid penetration time (NWSP 070.7R0(15));

[0051] - rewetting after re-penetration time (NWSP 070.8R0(15));

[0052] -Vertical capillary wicking of 0.9% NaCl solution according to AATCC 197, 2018.

[0053] In a second aspect, the present invention is a sanitary article system comprising such a reusable article base and an absorbent pad comprising

[0054] - a cover sheet on the core having a surface facing the wearer;

[0055] - having an opposing surface of a cover sheet under the core;

[0056] - a centrally located absorbent core comprising an absorbent pad material;

[0057] -optionally includes pad fluid handling aids;

[0058] and is adapted to be positioned in the pocket of the reusable chassis, aligned with at least a portion of the absorbent zone of the article chassis, with the core cover facing toward the user.

[0059] Such a sanitary article system may further comprise a handling aid that facilitates the application and / or removal of the absorbent pad, which may be a reinforcing member adapted for multiple applications of the absorbent pad. Alternatively or additionally, the handling aid may be integral with the absorbent pad and preferably comprises one or more elements selected from the group consisting of

[0060] k) Tabs or handles as operating aids

[0061] k1) as an extension of the peripheral area of ​​the pad; or

[0062] k2) attached to the outer surface of the pad;

[0063] l) Finger pockets on its outer surface as a handling aid.

[0064] The absorbent pad of the sanitary article system may also include one or more elements selected from the group consisting of:

[0065] m) removable coverings;

[0066] n) cellulose pulp, as described herein, exhibiting a pH value of less than 6, preferably less than 5.5 according to the "pH Measurement Test for Cellulose";

[0067] o) odor reducers, odor absorbers or odor control agents;

[0068] p) odor masking agents;

[0069] q) bacterial growth inhibitors;

[0070] r) inhibitors that inhibit the degradation of urea into ammonia and carbon dioxide;

[0071] s) an absorbent material, optionally a superabsorbent material, such that the absorbent pad has an absorption capacity of greater than 10 ml, preferably greater than 50 ml, or more preferably greater than 100 ml for a 0.9% NaCl aqueous solution;

[0072] t) absorbent material, optional superabsorbent material and optional acquisition aid, when subjected to the "Adult Incontinence Products: Acquisition Rate and Rewet Test NWSP070.9R1 (15)", the rewet value of the article is less than 10g, preferably less than 5g, and most preferably less than 1g.

[0073] The absorbent pad may also have one or more features selected from the group consisting of

[0074] u) Urine-related collection value less than 35 seconds when performing the urine-related collection and rewetting assay test PA07 / 03 (3 x 30 ml);

[0075] v) a Urine-related Rewet value of less than 15 g, preferably less than 10 g, more preferably less than 5 g, most preferably less than 1 g, when subjected to the Urine-related Collection and Rewet Determination Test PA07 / 03;

[0076] w) when subjected to the Menstruation Related Acquisition and Rewetting Test PA 05 / 02, the Menstruation Related Acquisition value is at least less than 20 seconds;

[0077] x) a Menstruation Related Rewet value of less than 5 g when subjected to the Menstruation Related Acquisition and Rewet Determination Test PA 05 / 01;

[0078] y) a surface pH of less than about 7.0, preferably less than about 5.5, more preferably less than about 5, when tested according to the Surface pH Measurement Test described herein.

[0079] Preferably, the absorbent pad is smaller in size than the fluid-absorbent area of ​​the article chassis, preferably covering less than 90%, preferably less than 70%, more preferably less than 50% of the fluid-absorbent area, optionally with a liquid permeable undercore cover sheet material.

[0080] The sanitary article base may include a base fluid handling aid material positioned

[0081] - is in direct contact with the liquid-absorbing area of ​​the base of the article, and / or

[0082] - the opposite surface of the pocket towards the chassis of the article, whereby the under-core covering sheet is liquid permeable.

[0083] In addition, the sanitary article base may include

[0084] a first base fluid-handling auxiliary material positioned in direct contact with the user-facing liquid-absorbing zone of the article chassis and a second base fluid-handling auxiliary material positioned towards an opposing surface of the pocket of the article chassis,

[0085] Thus, the first base fluid handling auxiliary material exhibits

[0086] - "Vertical Wicking Height" or

[0087] - "Vertical Liquid Absorption"

[0088] When tested according to the test described herein, the first base fluid handling aid material is higher than the corresponding value of the second fluid handling aid. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] Figure 1A and 1B Specific elements of an absorbent system according to the present invention are described.

[0090] Figures 2A to 2D Specific elements of an absorbent pad according to the present invention are depicted.

[0091] Figures 3A to 3C A specific combination of chassis and absorbent pad according to the present invention is depicted.

[0092] Figures 4A to 4C A specific embodiment of a chassis and absorbent pad combination according to the present invention is depicted.

[0093] These drawings are schematic only and are not drawn to scale. The same numbers represent the same or equivalent features or elements, and single quotes (') or multiple quotes (",'", ...) represent repeated features, such as left and right or front and back, etc. DETAILED DESCRIPTION

[0094] In the present context, an absorbent sanitary article is intended to be worn on the lower torso of a human wearer of any age, adapted to contain body exudates, particularly liquid exudates, e.g. urine, menstruation, such as released in the vaginal area or from the penis towards the "absorbent zone" of the article positioned adjacent to the exudate discharge organs.

[0095] Typically, absorbent sanitary articles include an "absorbent core" for handling body fluids (i.e., acquiring, distributing, and storing body fluids) and a "chassis" for keeping the absorbent core in place on the wearer's body. The absorbent article can be put on and taken off by the user himself or by a caregiver such as a baby's parent.

[0096] Hygiene products can be divided into

[0097] - "pant-type" articles which encircle the waist of the wearer, are firmly attached like a belt and may be implemented seamlessly over the circumference, but which may include side seams which may also include means for tearing these openings to facilitate removal. Typically, such articles are stretchable or at least extensible to obtain a good fit and to facilitate donning,

[0098] - or "belt diapers", which include fastening components for connecting the front and rear portions around the waist when worn, although these components can also be pre-closed during the manufacturing process so that they have a pant-like appearance but are easy to open and reclose if necessary.

[0099] In order to adapt to complex body contours, the chassis usually exhibits "elasticity", for example caused by elastic elements such as rubber, preferably synthetic rubber, thread, including LYCRA TM ) or the like, and elastic polyolefins, such as films or nonwovens. Additionally or alternatively, the chassis may include a structurally "extensible" material, such as the well-known knitted cotton underwear, where the knitted yarns are generally inelastic and, although the retraction force is generally lower than that of elastic materials, the knitted structure can easily conform to the contours of the body.

[0100] An "absorbent pad" typically consists of an absorbent core between an upper covering sheet facing the user and an oppositely disposed lower covering sheet, and may be held in place on the body by other means, such as a specially adapted removable base or a conventional underwear, optionally with the aid of a non-permanent adhesive and / or "wings" that can be folded around the crotch of the underwear.

[0101] The term "permanent" refers to a feature that remains substantially unchanged during its intended use, thus being a bond that can only be broken destructively, or a treatment such as hydrophobization that remains during its intended use although its effectiveness may be reduced.

[0102] A "one-piece diaper" includes an "absorbent core" securely and permanently attached to a "chassis" by which the absorbent core is held in place on the wearer's body.

[0103] With a "two-piece system", the absorbent core and base in the absorbent pad are separate, or at least can be easily separated, whereas a "pre-assembled system" can be used in which the manufacturer removably combines the core and base. The absorbent core can be in a "replaceable" absorbent pad in that the core can be easily removed and replaced with a similar component or a component that provides a similar or different function. The base can be similar to underwear, as is well known from hospital "net pants", which more or less accurately holds any absorbent pad in place. The present invention is directed to such a two-piece system.

[0104] The chassis of the absorbent sanitary article comprises an "inner layer" or "wearer-facing layer", forming the innermost surface that can be in direct contact with the skin during use, usually formed by a skin contact sheet or "top sheet", but may also include other elements, such as (single or multiple) leakage barrier sleeves or a chassis layer positioned inwardly in the waist or hip area. The absorbent sanitary article also includes an "opposite" or "garment-facing layer", in which the elements of the chassis form the outer surfaces of the absorbent article, such as the backsheet, side panels, waist fasteners, etc., if present. In the present context, the terms "upper" / "inner" and "lower" / "outer" correspond to "towards the user" and "away from the user", respectively. The term "major surface" describes the surface of the greatest extent of a generally planar or sheet-like structural element, and distinguishes these surfaces from the secondary surfaces of the end edges and side edges, that is, in an element having length, width and thickness, the thickness is the smallest of the three dimensions, and the major surface is the surface defined by the length and width, and therefore has the greatest extent.

[0105] Absorbent hygiene articles or elements thereof may be "disposable", ie intended to be used once, disposed of in an environmentally compatible and hygienic manner, and optionally recycled.

[0106] The absorbent sanitary article or its elements may be fully "reusable", being adapted to be washed multiple times, typically at least 30 times, preferably at least 60 times, without significant degradation of its properties and functions, and therefore typically subjected to washing with conventional detergents at at least 40°C, preferably at least 60°C or higher, even more preferably at least 90°C. Lower temperatures may be acceptable if specific cleaning agents are used, or if the material of the article has been specially treated, for example by permanently incorporated biocides. "Limited reusability" refers to articles that can be cleaned multiple times, although with a higher degree of wear than fully reusable articles, and / or articles that can be discarded like disposable articles after a number, for example up to 10 cycles of use.

[0107] Examples of fully reusable articles are so-called "menstrual pants" which exhibit low to moderate absorbency, which is achieved by hydrophilic fibers such as cotton fibers or yarns at a higher basis weight in and optionally also around the absorbent zone.

[0108] The above-mentioned "net pants" for hospital use generally exhibit limited reusability in that they can withstand washing conditions, at least a few times, but may also be discarded, for example, if heavily soiled with excrement, and in such cases may also be torn to facilitate removal.

[0109] The elements of the present invention and their functions are now explained with reference to Figures 1 to 4, whereby the illustrated embodiments should not be considered limiting. Furthermore, certain features or elements may be used independently of other elements shown in the figures.

[0110] When describing specific properties of materials and / or components, reference is made to the "Test Methods" section below, which describes in detail the determination of each parameter by the specific test method.

[0111] In a first aspect, the present invention is a reusable article base, in another two-piece sanitary article system or kit 100, including such an article base and a disposable absorbent pad, as exemplarily depicted in Figure 1, which is shaped to be worn on a wearer, having a waist opening 180 and leg openings 120' and 120", including an article base 1000 and a separate removable absorbent pad 2000, whereby the article base 1000 and the removable absorbent pad 2000 are adapted to cooperate with each other, the details of which will be described below. Compared to an integrated system, such a system not only provides a significantly improved environmental footprint, but also allows the user to operate better. In addition, such a system also allows specific functions or characteristics to be assigned to a part of the system, such as a disposable absorbent pad, which is incompatible with the base, for example due to washability requirements, or for cost considerations.

[0112] The article chassis 1000 presents a width (y-) 1018 and a length (x-) 1012 direction, the first direction corresponding to the left-right direction of the user, and the second direction corresponding to a line extending from the front of the user (i.e., the navel) through the crotch to the back (i.e., the smaller part of the back). The thickness (z-) direction 1015 extends perpendicular to both, whereby the terms "upper" / "inner" and "lower" / "outer" correspond to "toward the user" and "away from the user", respectively. The skilled person will also readily apply these terms to the chassis and absorbent pad when separated from the user, such as when manufactured or packaged.

[0113] The chassis 1000 is preferably implemented in a "pants type" but can also be an open diaper type, such as Figure 1A This is shown in dashed lines, where the front and rear portions are connected by a closure element 1700, such as to be secured by the user or optionally already connected during manufacture ("pre-closed").

[0114] The chassis 1000 is a reusable and washable pant-shaped article having an inner layer 1100 facing the wearer that is substantially continuous but includes a fluid-absorbent zone 1200 and a main chassis zone 1300 that exhibits significant differences in at least one property, such as hydrophilicity, porosity, or rewetting. As shown, the fluid-absorbent zone 1200 may be completely surrounded by the main chassis zone 1300, although it may extend toward the periphery of the chassis, such as laterally in the crotch region. Optionally, there may be a transition zone 1400, see Figure 1B , where the materials of the absorbent zone 1200 and the main chassis area 1300 (if different) can be connected, or where the property(s) change. Typically, the chassis exhibits excellent fit, good softness, good feel and appearance, like known textiles, e.g., knitted cotton, underwear.

[0115] Importantly, the absorption zone 1200 includes a base fluid handling auxiliary material that exhibits balanced liquid handling properties, i.e., good acquisition properties so that released secretions can penetrate the material and leave the wearer, and low rewetting properties that provide a dry feel even after loading. In addition, the base fluid handling auxiliary material should allow for good transfer of loaded liquid to the absorbent pad and should not exhibit high absorbency that would adversely affect washing and drying. Therefore, the absorption zone 1200 includes a base fluid handling auxiliary material 1250, such as a liquid acquisition or distribution material, which can improve liquid absorption but should not compromise rewetting properties. Optionally, the absorption zone or at least the base fluid handling auxiliary material can be covered by the top sheet 1210.

[0116] The base 1000 includes a pocket located below the wearer-facing layer 1100, which is adapted to accommodate an absorbent pad 2000, whereby application of the absorbent pad 2000 to the base 1000 can be performed before donning the combined base / absorbent pad system, but can also be easily performed after donning the base without a pad and / or when replacing a loaded pad. The base includes a pocket opening for managing the absorbent pad, which can be located on the outside of the base to allow easy access even after donning, or can be located on the inside of the base.

[0117] See also Figures 2A to 2C , the absorbent pad 2000 can generally be designed as known in the art, i.e., comprising an absorbent core 2200 having an absorbent material (e.g., pulp 2220), and preferably also comprising a superabsorbent material 2240 as a final liquid storage material, while being thin and soft or flexible both when dry and loaded for comfortable use. It can also include a pad liquid handling aid 2250 as a liquid acquisition or distribution aid. The absorbent pad should be adapted to cooperate with the absorbent area of ​​the base. Typically, although not necessarily in all design options, the absorbent pad includes a liquid barrier 2900 on the garment-facing side, such as a core undercover 2920, and a fluid-permeable core overcover layer 2100 on the user-facing surface. However, the core undercover can also be implemented as a liquid-permeable material, particularly if the base article includes an additional or optional base liquid handling aid 1250 positioned toward the opposing surface of the pocket of the article base, which aid 1250 allows liquid to be transferred to the side of the absorbent pad away from the wearer (see Figure 4B , Figure 4C ).

[0118] The under-core cover sheet and the over-core cover sheet may be interconnected along the periphery 2300 of the absorbent pad. Optionally, the absorbent pad may also contain additives, particularly additives that are not suitable for addition to the base, such as odor absorbing or controlling materials, pH controlling materials that provide a healthy skin pH or urease blockers for preventing ammonia release, odor reducing or complexing agents, such as cyclodextrins, or odor masking agents, such as fragrances, or biocides or other active ingredients that are not suitable for laundry processes. It is important to implement the combination of the base 1000 and the absorbent pad 2000 so that they have good liquid contact, so that good transfer of liquid from the absorbent area of ​​the base to the absorbent pad can be achieved and maintained throughout the use period, and preferably the base 1000 and the absorbent pad 2000 are adapted to each other so as to present a

[0119] - the liquid transfer from the absorbent zone 1200 of the chassis to the final liquid storage area in the absorbent core 2200 is unimpeded or minimally impeded;

[0120] - Minimal rewetting, especially in the absorption zone 1200;

[0121] - Good liquid sealing towards the outside of the system 100;

[0122] - Easy to apply, stay in place, and easy to remove, especially the absorbent pad 2000, without having to take off the base 1000.

[0123] like Figure 1B As illustratively shown, the combination may be a pocket 3200 of the chassis 2000, with the pocket opening 3210 covering a portion of the absorbent zone 1200, or at least allowing access to the absorbent zone 1200, adapted to allow the absorbent pad 2000 to be positioned therein. Figure 3A , the pocket can be implemented as being permanently attached to the outer surface 1900 of the base on three sides. The pocket can be implemented as additional material positioned on the base sheet of the article, covering an opening in the base sheet, thereby allowing an inserted absorbent pad to contact the absorbent area of ​​the base. The pocket opening can be implemented as an opening or slit through the base sheet of the article. Alternatively, the opening can be located in the waist area so that the top sheet and the base sheet of the base are not connected to each other. For specific embodiments, the pocket opening can also pass through the top sheet of the base of the article.

[0124] The pocket may include an attachment element 3260 for removably closing the pocket.

[0125] Depending on the liquid barrier properties of the core cover sheet under the absorbent pad, the outwardly positioned pocket material 3220 can be a liquid-impermeable material, such as a breathable plastic film for improved comfort, or a film / nonwoven composite material, or a liquid-repellent textile or a liquid-permeable material.

[0126] The material of the pocket may be elastic so that upon application it is stretched and then applies force to the pad / chassis interface in the absorbent zone, thereby enhancing contact and improving liquid transfer, or even further enhancing body contact.

[0127] It should be noted that the fluid-absorbing area can have a shape and size adapted to the intended use, for example, designed for female applications, male applications or unisex applications. Accordingly, the connecting element can also be adapted. See Figure 3A , a pocket design with a slit-style opening positioned toward the front waist of the wearer may be particularly useful for male applications. For female designs, a pocket with a pocket opening positioned more toward the crotch area may be appropriate, see Figure 3B , or even a "tunnel pocket", cf. Figure 3C , having pocket openings at the front and rear of the base article, the optional use of a second absorbent pad may be particularly useful when the anal area should also be covered.

[0128] Having generally described a sanitary article system with its key elements, a base and an absorbent pad, and focusing on the interaction of these elements, specific or exemplary embodiments and features of these elements will be described below, still with reference to Figures 1 to 4. A skilled person should readily recognize that various specific features of the sanitary article base and the absorbent pad can be combined for a specific article base, or a specific pad, or a specific system including a specific article base and a specific absorbent pad.

[0129] As mentioned above, the size and shape of the chassis should be adapted to the intended use and cover the corresponding discharge release areas of the wearer. At least for these areas, a tighter fit is preferred, such as briefs, while in the main chassis area outside thereof, a wider fit, such as "boxer shorts" is acceptable.

[0130] Optionally, the base may also include a leakage barrier 1500, see Figure 1B , shown as a front barrier 1500' and a rear barrier 1500", longitudinally arranged on the outside of the absorbent zone 1200, such as the well-known "barrier leg sleeves" in conventional articles. This leak barrier is connected to the inner surface of the base at its base 1520', 1520", extending at least 1 cm, or 2 cm, or 3 cm from the base, and can terminate with an elastic line 1550', 1550" at the end 1580 opposite the base. This leak barrier can also be mainly longitudinally extended and extend over the entire length of the base. This leak barrier can be made of any liquid-impermeable material, preferably a hydrophobic nonwoven material or textile, according to EDANA NWSP080.6R0 (15) "Evaluation of water resistance (hydrostatic pressure)", more preferably liquid-impermeable until a water head greater than about 10 mm, or greater than about 20 mm, or greater than about 40 mm when measured.

[0131] The chassis should be designed to be easy to put on and take off. It can be implemented as a "lace-up system" that includes fastening means for connecting the front and back parts around the waist, which are preferably pre-closed during the manufacturing process so that they have a trouser-like appearance, but are easy to open and reclose if necessary. In an often preferred embodiment, the chassis is designed as a "trouser-type" that surrounds the wearer's waist and is securely connected like a belt, but it can include means for tearing the side seams for easy removal. Likewise, a seamless article chassis, such as a seamless article chassis with a circular knit material, may be very suitable. Typically, such an article is stretchable or at least extensible to obtain a good fit and easy donning.

[0132] To facilitate donning and maintain a good fit to the body contours, suitable materials may exhibit at least about 5% stretch or elasticity relative to the unstretched length, preferably greater than about 10% or greater than about 30% or greater than about 50%. Preferably, the material exhibits low hysteresis so that the material recovers its shape after being stretched, for example when tested according to the stretch test NSWP110.4, and a low degree of "deformation" so that it maintains its shape or avoids sagging during use. Preferably, the retractive forces are balanced so that the article can be maintained in its position even under load without unduly affecting the wearer, such as red markings.

[0133] The chassis may also include different areas of elasticity and stretch, for example the main chassis area may exhibit stretch, which may be provided by woven cotton or a blend of cotton and elastic synthetic fibers. Typical blend ratios range from 70% to 98% cotton and 2% to 30% elastic fibers. Blends of cotton and synthetic fibers such as polyester (PET) or polyamide (PA) may also be used instead of cotton. The chassis article may also include an elastic waistband 1800, see Figure 1A , which may exhibit a different elasticity than the main chassis material. Preferably, the chassis exhibits a peripheral extensibility of at least 10%, or more than 50%, or more than 100%, at least in the waist region relative to the unstretched perimeter.

[0134] It is highly preferred that the base, at least the major base region, exhibit a thickness greater than about 0.2 m when tested in accordance with ASTM D737.18. 3 / (square meters per second 2 *sec), or greater than about 1.0m 3 / (m 2 *sec) is "breathable" (breathable).

[0135] Suitable material choices for the main base include, but are not limited to:

[0136] - textile materials, such as knitted or woven materials, such as interlock or fine rib or plain weave, made of conventional cotton or rayon / viscose fibers or blends, which may contain elastic fibers, such as, but not limited to, Lycra;

[0137] - 100% knitted cotton, such as the double mesh fabric used for white sports briefs - a classic original; product number: 005044-100, Schiesser GmbH, Germany;

[0138] - a knitted blend of 95% natural organic cotton and 5% spandex, such as the boxer briefs in organic cotton dark blue - 95 / 5 product number 174004-803 from Schürer GmbH, Germany;

[0139] - knitted blended fabrics containing 70% polyamide and 30% elastane, such as the white invisible soft fabric for Maxi-Slip Microware, product number: 166916-100, Scheherzer GmbH, Germany;

[0140] - knitted modal 35%, cotton 35%, polyamide 20%, elastane 10%, such as for boxer briefs modal Hollow Airtechnology fine heather aquamarine-Pique; Product number: 176695-813, Shuya GmbH, Germany:

[0141] - nonwoven materials, such as spunbond nonwoven materials, for example a polypropylene web having fibers of about 1.7 dTex to about 3.0 dTex; or carded nonwoven materials using a fiber mixture that can be bonded by hydraulic entanglement;

[0142] It is also possible to use vapor permeable membrane materials which can exhibit a water vapor transmission rate greater than 5000 (g / m 2 / 24h), or greater than about 8000 (g / m 2 / 24h) or greater than about 10000 (g / m 2 / 24h) vapor permeability.

[0143] A suitable base should be washable, i.e. able to withstand at least one, or at least 10, or at least 30, or at least 60 washing cycles in a conventional domestic washing machine, e.g. in a German Miele & Cie. KG, Miele WCA030 WCS model, at a temperature of at least 40° C., preferably 60° C., more preferably 90° C. and a spin speed of 1400 rpm. Preferably, a suitable base should be dryer or tumble dry compatible, at least under "gentle drying" conditions. Optionally, the base material may be treated to reduce the influence of bacteria or odor generation.

[0144] In the absorption zone 1200, preferably at least one property, preferably more than one property, related to liquid handling should be different from those in the main base area, which properties can be selected from

[0145] - Hydrophobicity / hydrophilicity;

[0146] - porosity or pore size;

[0147] - surface topography, such as embossings, for example bend lines or channel structures;

[0148] -Material composition, thickness, density, basis weight;

[0149] - Rewetting and / or fluid acquisition properties.

[0150] As specific examples, the absorbent zone can be made by modifying the main base material, such as by applying specific treatments, such as hydrophobizing and / or perforating or hydrophilizing in the case of a hydrophobic base material, or can be a different material connected to the main base material in the transition zone 1400 by conventional means, such as but not limited to stitching, gluing, and thermal bonding.

[0151] The absorbent zone 1200 should exhibit balanced fluid handling properties, allowing both rapid acquisition of fluid and rapid and efficient transfer of fluid to the absorbent pad 2200. Accordingly, the materials contained in the absorbent zone, and in particular the absorbent zone topsheet, may exhibit one or more of the following properties:

[0152] - The material should be hydrophilic according to the single load drop test with a penetration time of less than 30 seconds, preferably less than 15 seconds, most preferably less than 5 seconds, or even spontaneous penetration of the material.

[0153] The "nonwoven bleed" value according to EDANA NWSP 080.9.R0 (15) is preferably less than about 50%, or less than about 25%, or less than about 10%, or even substantially 0%.

[0154] - According to ASTM D 737-18 "Air permeability of nonwoven materials" (measured at 125 Pa, surface area 20 cm 2 ), preferably greater than about 0.5 m 3 / (m 2 *s), or greater than about 1.0m 3 / (m 2 *s), although usually less than about 3.0 m 3 / (m 2 *s).

[0155] -pore size, for example by having a hole having a size corresponding to a circle with a diameter greater than about 0.25 mm, or greater than about 0.5 mm, or greater than about 1 mm, or even greater than about 5 mm, typically less than about 15 mm or less than about 10 mm, whereby the hole may also have a three-dimensional funnel-like shape.

[0156] - "Repeated liquid penetration time (simulated urine)", EDANA NWSP 070.7 (3 times 5 ml 0.9% NaCl) is less than 50 s, or less than 25 s, or less than 15 s, or less than 10 s.

[0157] - "Rewet after repeated liquid penetration time (simulated urine)" EDANA NWSP 070.8 is less than about 10.0 g, or less than about 5.0 g, or less than about 1 g, or even less than about 0.5 g.

[0158] A particularly suitable exemplary topsheet material is a 92% polyester / 8% elastane wale / jersey web having a basis weight of 210 g / m 2 , with a thickness of 0.85 mm and a fiber diameter of approximately 18 μm, and can be purchased from RueyTay Fiber Industry Co. Ltd in Taiwan, China under the name R150411.

[0159] A particular feature of the present invention is that the absorbent zone 1250 comprises a base fluid handling aid material 1250 having particularly balanced fluid handling properties, as measured by the parameters and their respective determination methods described below as appropriate:

[0160] - "Vertical Wicking Height" and "Vertical Fluid Uptake" reflect the capillary wicking capacity of a material when tested according to the "Vertical Wicking Test" described below. "Vertical Liquid Uptake" is determined by monitoring the fluid uptake of a vertically suspended material with its lower end immersed in a fluid container for a period of time and should

[0161] greater than about 2.0 g, or greater than about 5.5 g at 3 minutes,

[0162] Or greater than about 6.0 g at 5 minutes.

[0163] The vertical wicking height is the equilibrium height, monitored after 30 minutes, and should be

[0164] Greater than about 19 cm, or greater than about 20 cm, or greater than about 22 cm.

[0165] - "Liquid Flow Resistance" reflects the ability of a material to simultaneously accept liquid by capillary wicking and release liquid by gravity, according to the "Liquid Flow Resistance Test" described below and produces a measurement of "Liquid Flow Rate", which should be greater than about 0.4 g / min, or greater than about 0.6 g / min, or greater than about 0.8 g / min.

[0166] - "Horizontal Liquid Transfer" reflects the ability of a material to accept liquid in a horizontal position and release it to a standard absorbent core as described in the "Horizontal Liquid Transfer Test" below. The material should exhibit

[0167] After 5 minutes, greater than about 18 g, or greater than about 20 g, or greater than about 22 g;

[0168] After 10 minutes, greater than about 30 g, or greater than about 34 g, or greater than about 37 g;

[0169] After 20 minutes, it is greater than about 68 g, or greater than about 73 g, or greater than about 78 g.

[0170] - "Vertical Liquid Transfer" reflects the ability of a material to accept liquid in a vertical position and release liquid to a standard absorbent core, as described in the "Vertical Liquid Transfer Test" below

[0171] After 1 minute, greater than about 4.0 g, or greater than about 5.0 g, or greater than about 5.5 g;

[0172] After 3 minutes, greater than about 8.0 g, or greater than about 9.0 g, or greater than about 10.0 g;

[0173] After minutes, it exceeds about 18.0g;

[0174] - "Liquid hold-up" (centrifuge capacity)

[0175] Less than about 10.0 g / g, or less than about 5.0 g / g, or less than about 2.0 g / g, but greater than about 0.5 g / g or greater than about 1.0 g / g.

[0176] - "Liquid intake time and rewet" exceeds standard absorbent materials

[0177] The ingestion time is less than 35 seconds, and

[0178] Less than 15g, or less than 10g, or less than 5g, or less than 1g rewet.

[0179] Suitable materials for the absorbent zone can be selected from a wide selection of material components according to such requirements, such as nonwoven materials, such as spunbond, carded, meltblown fiber webs, which contain the following materials alone or in a mixture with each other:

[0180] - hydrophilic synthetic fibers, for example comprising polyolefins, polyesters, polyamides, optionally comprising a surface treatment agent, optionally comprising a permanent surfactant or comprising a hydrophilic melt additive;

[0181] - natural fibres, such as cellulose fibres, such as cotton, hemp, flax, bamboo or silk;

[0182] - modified natural fibers with hydrophobic treatment, such as cellulose-based fibers, cotton, hemp, flax, bamboo;

[0183] - Regenerated natural fibers, for example cellulose, such as viscose, rayon, lyocell-based materials, optionally treated, such as OLEA from Kelheim Fibers, Germany TM The fibers are given a hydrophobic treatment.

[0184] Other suitable materials include textile webs of threads or filaments, such as knitted, woven or mesh structures, which may be made from materials that may also be used for nonwoven fabrics.

[0185] It is also possible to use porous films and film / textile laminates, in particular porous films exhibiting three-dimensionally shaped funnel-shaped holes, optionally combined with a fibrous layer on the side facing the user.

[0186] like Figure 1B As shown, in the absorption zone 1200, the base fluid handling auxiliary material 1250 can form the inner surface layer 1100, or another material, such as the well-known top sheet material 1210, or a composite material that can present sub-layers arranged in the z-direction 1015, and these sub-layers present different properties, for example, the topmost user-facing top sheet layer 1210 can present excellent softness, skin friendliness or other properties, at the expense of, for example, fluid absorption speed under higher loads. A second layer or sub-layer can then be used as the base fluid handling auxiliary material 1250, adapted to the absorption properties of the absorbent pad. When such as Figure 4B and Figure 4C As shown, when the chassis fluid handling aid material 1250 is positioned toward the opposite surface of the pocket of the article chassis, ie away from the user relative to the absorbent pad, the inner surface layer should obviously be a separate material having the above-mentioned properties.

[0187] It has been found that terry fabrics can suitably meet such requirements if these are selected according to the above referenced requirements, but without wishing to be limited thereto. Without wishing to be bound by theory, it is believed that this property of a particular terry fabric results from the combination of a lofty pile portion that can easily absorb any fluid and a denser base portion that enhances liquid transport.

[0188] An exemplary suitable material is a 100% polyester based knitted fabric having a single face closed loop pile, a fiber thickness of about 11 μm, and a basis weight of about 260 g / m 2 , with a thickness of 1.7 mm, hereinafter referred to as "Terry cloth-1", which can be purchased from Ruitai Fiber Industry Co., Ltd. of Taiwan, China under the trade name 91023FM, wherein the terry side is the side facing the user during use and testing.

[0189] This exemplary material has been compared to conventional materials.

[0190] The first was a double-sided closed loop terry cloth, hereinafter referred to as "MyLily", which was taken from a commercially available menstrual panty, currently marketed as a high-waisted-periodenunterwsche by MYLILY of Hamburg, Germany, believed to be composed of 80% polyester and 20% nylon, with an advertised use capacity of up to 30ml. For the extracted material, the length direction remained unchanged throughout the test.

[0191] The second comparison material is a double-sided closed-loop terry cloth with a fiber diameter of 11 μm, 80% polyester and 20% nylon, and a basis weight of 250 g / m 2 , thickness is 2.8mm.

[0192] Comparison of the above reference performance according to the test methods described below gives the following results (Table 1).

[0193]

[0194]

[0195] Table 1

[0196] Therefore, the selected parameters provide a suitable tool to distinguish the materials of the present invention, especially the examples of Terry Cloth-1, from the comparative materials.

[0197] By comparing with traditional incontinence products in the market, the advantages of Terry Cloth-1 were further confirmed, namely

[0198] -Teby, Italy: Menstrual and Incontinence Panties - Slip - Black

[0199] -Taynie, Germany: Taynie Herren Slip 500ml S / M

[0200] -Essity, Sweden: TENA Silhouette Waschbare |Classic L

[0201] Sample 1 of the present invention is made of composite laminated layers, which are

[0202] - Topsheet material 92% polyester / 8% elastane wale / jersey mesh, basis weight 210 g / m 2 , with a thickness of 0.85 mm and a fiber diameter of about 18 μm, available from Ruitai Fiber Industry Co., Ltd., Taiwan, China, under the trade name R150411, as described above;

[0203] - Upper base fluid handling auxiliary material towel cloth-1, as described above;

[0204] - an absorbent structure made of an airlaid material, available from Glatfelter, Germany, under the trade name MM460.SMT.CST00.V01.J.NoC, presenting

[0205] -Basis weight 460g / m 2 (NWSP 130.1.RO(15)),

[0206] -60w-% SAP,

[0207] -Thickness 1.8 mm (NWSP 120.6.RO(15)),

[0208] -Calculated density is 0.256 g / m 3 ;

[0209] - Dry tensile strength - (MD) 48N / 50mm (NWSP 10.1.RO (15)),

[0210] -20g / g "liquid retention",

[0211] -Width 46mm, length 200mm,

[0212] Quilt: 35g / m 2 The spunlace cotton web is wrapped, and the cotton web can be obtained from Winner Medical of China under the trade name PCO-35-N, thereby forming a standard absorbent material with a width of 50 mm;

[0213] - Lower base fluid handling auxiliary material terry cloth-1 as described above, also including about 18g / m 2 A single piece of polyurethane film.

[0214] Comparison was made according to the "Absorption Time and Rewet" test described in the Test Methods section below, and the results are shown in Table 2:

[0215]

[0216]

[0217] Table 2

[0218] Thus, the combination of the present invention provides an excellent combination of absorption time and rewet.

[0219] See also Figure 1B There can be a transition zone 1400 between the absorbent zone and the main chassis zone where the properties can change gradually or stepwise. The transition zone can also exhibit different properties than the absorbent zone and the main chassis zone, for example, as a completely hydrophobic barrier between the absorbent zone having balanced hydrophobicity and the main chassis zone which can be hydrophilic.

[0220] An example of a material for the transition zone is a polypropylene fabric (hydrophobic), such as available from Orneule OY, Finland.

[0221] The various materials of the article chassis can be connected by conventional construction elements that withstand the requirements of multiple washing cycles, such as but not limited to sewing or heat fusion bonding, such as heat pressing or ultrasonic bonding. In addition, certain adhesives or glues can be used if skin compatibility (including softness) and resistance to temperature and washing conditions are met.

[0222] The absorbent pad comprises an upper core cover sheet 2100, a lower core cover sheet 2920 and an absorbent core 2200 (see FIG. 2 ) interposed therebetween in the z direction. Optionally, the upper core cover sheet and the lower core cover sheet may be integral, for example forming a complete core wrap.

[0223] The core cover sheet is adapted to be in contact with the chassis liquid at least in the absorption zone and optionally also in the transition zone (if present). The core cover sheet can be a conventional top sheet material for absorbent articles, for example 10 g / m 2 Spunbond PP NW, 1.5 to 2.0 dTex. In order to promote the transfer of liquid from the fluid handling aid (intermediate storage layer) to the core, it has been found to be advantageous to use a fabric made of cellulose fibers, e.g. 35 g / m 2 The spunlace cotton mesh can be purchased from Winner Medical of China under the trade name PCO-35-N.

[0224] The absorbent core of the absorbent pad may include a pad acquisition / distribution layer (ADL) 2250, instead of or in addition to the chassis fluid handling adjunct material 1250, if present. Such acquisition materials are well known to those skilled in the art, but should be adapted to the particular intended use.

[0225] The absorbent core further comprises absorbent material, preferably superabsorbent polymer (SAP) material, which may be combined with fibrous material such as cellulose pulp.

[0226] The absorbent core may be formed in situ by combining SAP powder with a fibrous material such as pulp or a synthetic fiber web, preferably stabilized by an adhesive or heat-melt such as ultrasonic bonding as is known in the art.

[0227] In particular when intended and adapted for female users, the absorbent core preferably allows to maintain a natural pH value of about 5.5 in the vaginal area, as shown by a pH value of less than 6 or less than 5 or even less than 4 after loading the absorbent core with 0.9% NaCl solution at 6 times its dry weight and measuring the pH value by pressing a pH indicator paper (MERCK 1.09527.0001) against the surface of the wetted absorbent core at the point where the NaCl solution was applied, for example by containing a specific pulp such as the "Bliss" product of the International Paper Company of the United States. TM Pulp". Keeping the pH in the absorbent core below 6 is beneficial for masking odors based on ammonia or TMA (trimethylamine), which are often present in menstrual fluid and urine. In addition, the low pH inhibits the growth of bacteria, similar to the protective acidic mantle of human skin. This allows to forgo the use of biocides commonly used in washable menstrual pants.

[0228] The absorbent core may be preformed, such as the product available under the trade name eCore from Glatfelter Falkenhagen GmbH, Germany, or MM150.SMT.CSN00.V03.F available from Glatfelter Falkenhagen GmbH, Germany, or Gelok 15040-71S / S available from Gelok Int. Corp., Dunbridge, USA, or C1250956 available from Engineered Absorbent Materials, Inc. (EAM), USA. Or SuperCore SCP-200-TCF available from McAirlaid's Vliesstoffe GmbH in Germany.

[0229] Alternatively, the absorbent core can be made from fluff fibers formed in a straight line or from a mixture of SAP (super absorbent polymer) and fluff pulp fibers formed in a straight line, the mixture being formed on a processing line using a hammer mill and a drum former, or by combining SAP particles with synthetic fibers.

[0230] The absorbent core is preferably thin, preferably exhibiting a dry thickness of less than about 5 mm, or less than about 3 mm, or less than about 2 mm, but typically greater than about 0.1 mm.

[0231] The absorbent core may exhibit an overall liquid holding capacity that need not be maximized because the absorbent pad may be easily replaced without replacing the chassis.

[0232] Thus, the total liquid retention capacity should be greater than about 10 ml, or greater than about 20 ml, or greater than about 50 ml, or greater than about 100 ml, but typically less than about 500 ml, or less than about 300 ml, as measured by "Centrifuge Capacity" (Modified MWSP 241.0) as described below.

[0233] Furthermore, the high local basis capacity expressed as the absorbent capacity per unit area should not be too great, otherwise it would lead to an undesirably bulky wearing impression.

[0234] If the basic capacity of the absorbent core is greater than about 2000 ml / m 2 , or greater than about 4000ml / m 2 , or greater than about 7000ml / m 2 , but less than about 16000ml / m 2 , or less than about 13000ml / m 2 , or less than about 10000ml / m 2 , which can be achieved, this basic capacity is calculated from the above reference centrifuge capacity according to the modified EDANA NWSP 241.0.

[0235] Optionally, the absorbent core may contain an odor masking or reducing agent, which may be a fragrance, an odor absorbent, or a bacterial growth inhibitor, such as, but not limited to, ricinoleic acid-based zinc, such as ricinoleic acid zinc methylglycine diacetic acid, N,N-bis(carboxymethyl)alanine trisodium salt (MGDA), available from Surfachem Deutschland GmbH under the trade name Sorb30B was purchased;

[0236] - Contains cyclodextrins, such as those from Wacker Chemie AG, Germany

[0237] - Contains silver ions, available in silver chloride, optionally as nanoparticles.

[0238] Alternatively, the superabsorbent polymer used may be modified to enhance odour control functionality, for example by including a urease blocking function, such as SAP type OC-301 supplied by LG-Chem of Korea.

[0239] Alternatively, specially modified cellulose fluff pulps may be used, for example exhibiting a pH value of less than 6 or less than 5 or even less than 4, such as the above-mentioned "Bliss TM "Pulp or International Paper Company Odor Control Fluff Pulp.

[0240] The applications of absorbent pads vary from daily use, menstruation, light incontinence, and heavy incontinence. Therefore, depending on the target application, especially those related to urine or menstruation, different test methods must be applied to determine acquisition and rewet.

[0241] Preferably, the absorbent core comprises absorbent material, optionally superabsorbent material, such that it exhibits an absorbent capacity of more than 10 ml, preferably 50 ml or even 100 ml, depending on the application (menstrual pants or incontinence pants), as determined according to the Centrifuge Capacity Test as described below. Preferably, when subjected to the Urine-related Acquisition and Rewet Test of the absorbent pad, as described below, the absorbent pad exhibits a Rewet value of less than 10 g, or less than 5 g, or less than about 1 g.

[0242] Preferably, the absorbent pad exhibits an acquisition value of at least less than 300 seconds when the absorbent pad is subjected to an acquisition and rewet test involving urine, as described below.

[0243] Particularly when intended for use in catamenial products, the absorbent core may exhibit an acquisition value of at least less than 20 seconds when subjected to the Menstruation-Related Acquisition and Rewet Test for Absorbent Pads as described below, or a Rewet Value of less than about 5 g when subjected to the Menstruation-Related Acquisition and Rewet Test for Absorbent Pads.

[0244] The absorbent pad may also include an external barrier 2900 to prevent liquid from penetrating to the outside, such as clothing. Such barriers are well known in the art and may be a conventional undercore cover sheet 2920 for sanitary materials, such as a film material, such as typically less than about 25 g / m 2 or less than about 20g / m 2 PE or PP film, optionally with a fiber layer (also called "textile backsheet" material), a hydrophobic NW material, such as PP-SMS@18g / m 2 Or a combination of SSMMSS, etc. Alternatively, the outer layer 2900 may also be liquid permeable, such as a design with a base fluid handling aid material located outside of the pocket as will be further described herein.

[0245] The core cover sheet and the core cover sheet of the absorbent pad wrap the absorbent core, which can be achieved by conventional design. Figure 2D In a first embodiment, the lower core cover sheet can be folded around the sides of the core, overlapping the upper core cover sheet along the periphery of the absorbent pad. In a second embodiment, the lower core cover sheet can be folded around the sides of the core, but on the side of the absorbent pad facing the chassis, it is located below the upper core cover sheet, i.e., between the upper core cover sheet and the absorbent core, whereby the upper core cover sheet can also be folded around the sides facing the lower core cover sheet to provide a more pleasing appearance, although in this design, the upper core cover sheet should not exhibit lateral wicking.

[0246] In another embodiment, see Figure 2C The core upper cover sheet and the core lower cover sheet extend outwardly beyond the absorbent core and can be joined in a "butt-jointed" manner at the periphery thus formed, whereby the overall inner surfaces of the webs are in contact.

[0247] The absorbent pad may be constructed by applying conventional techniques, such as gluing and / or thermal bonding, optionally ultrasonic bonding.

[0248] Preferably, the absorbent pad exhibits a balanced stiffness or resistance to bending, as this can facilitate handling, particularly when inserting the absorbent pad into a pocket. In particular, for applications where the absorbent pad will be positioned in the crotch region of the wearer, the absorbent pad should be considered soft or pliable, readily conforming to lateral compression of the leg.

[0249] For this purpose, it may be preferred that the bending stiffness according to "Stiffness of nonwoven fabrics using cantilever test (INDA), NWSP090.1.R0 (15) is

[0250] - less than about 200 mN*cm, or less than about 150 mN*cm, or less than about 80 mN*cm in the longitudinal direction, but generally greater than about 10 mN*cm, or greater than about 20 mN*cm;

[0251] - less than about 150 mN*cm, or less than about 100 mN*cm, or less than about 60 mN*cm in the width direction, but generally greater than about 10 mN*cm, or greater than about 20 mN*cm,

[0252] - more than about 5%, or more than about 10%, or more than about 20% higher in the longitudinal direction compared to and based on the height in the width direction.

[0253] This can be achieved by applying specific glue or embossed lines on the absorbent pad or its core, which may generally extend longitudinally but have a curved shape.

[0254] Optionally, the absorbent pad may include a handling aid, such as a pocket 3400 on its outer surface, adapted and dimensioned so that one or more fingers may be inserted to push the absorbent pad into its correct position.

[0255] Another alternative handling aid for the application of absorbent pads could be a separate application aid which exhibits the required stiffness as described for the absorbent pads, but is removed after application and can be reused similar to a shoe horn for further applications.

[0256] Optionally, for embodiments in which the absorbent pad includes attachment elements on its surface that may have a tendency to adhere to a surface before being properly positioned, such as adhesive strips or mechanical fastening hooks, the core cover sheet surface of the absorbent pad may include a release paper, optionally including a removal strip that allows the release paper to be pulled away once the pad is in place.

[0257] Optionally, the absorbent pad may include a removal aid as a handling aid. In a first embodiment, when the upper core cover sheet and the lower core cover sheet are connected in a "butt-jointed" manner, whereby the substantial inner surfaces of the webs are in contact arrangement, in the outer periphery of the pad, the removal aid may be an enlarged tab portion of the periphery. Alternatively, the tab may be connected to the pad, optionally as a loop or arched handle, adapted as a finger pocket 3400 for ease of application.

[0258] Another specific aspect of the present invention is that the chassis and absorbent pad as described above can be combined into a fully functional absorbent sanitary article system whereby each of the two can be replaced independently of the other and whereby the absorbent pad is positioned so that the fluid receiving surface is oriented in good liquid contact with the absorbent area of ​​the chassis. "Good liquid contact" refers to an arrangement in which fluid can be transferred from the absorbent area of ​​the chassis without a significant reduction in fluid transfer performance compared to an arrangement in which the two elements are attached to each other by applying slight pressure to bond the two layers together under laboratory testing conditions.

[0259] The user may put on a fitted base, either with the absorbent pad already inserted, or without the absorbent pad inserted. Sometimes, it may be easier to apply the absorbent pad after putting on the base, and the pad may be positioned correctly when applied.

[0260] Another specific embodiment of the sanitary article system 100 is described with reference to FIG4. For this combination of a base 1000 and an absorbent pad 2000, the base includes a pocket 3200 adapted to receive the absorbent pad 2000, the pocket having a pocket opening 3210, optionally reclosable, and a pocket attachment 3280 attached to an outer surface of the base. In addition, the base 1000 includes a base fluid handling auxiliary material 1250. In a first embodiment, the base fluid handling auxiliary material 1250 is attached to or integral with the material of the absorbent zone 1220, for example, located opposite the inner surface layer 1100 of the base 1000, see FIG4. Figure 4A , allowing fluid to pass toward the user-facing surface 2100 of the underlying absorbent pad 2000. In a second embodiment, see Figure 4B , the base fluid handling auxiliary material 1250 is connected to or integral with the pocket material 3220, opposite the liquid impermeable outer surface 3290 of the pocket material, i.e., once inserted into the pocket, is positioned toward the absorbent pad 2000, and all surfaces of the absorbent pad are liquid permeable. In a third embodiment, see Figure 4C, the base includes two base fluid handling auxiliary materials 1250' and 1250", which are positioned so that all surfaces of the absorbent pad 2000 are liquid permeable, and the absorbent pad 2000 can be sandwiched between these two materials. For any of these embodiments, the absorbent pad 2000 includes an absorbent core 2200, which is adapted to absorb liquid from the base fluid handling layer, for example by exhibiting higher capillary suction, preferably further supported by the osmotic suction of the SAP contained therein, preferably with a weight ratio of SAP greater than about 60% in the absorbent core. A particularly suitable embodiment of the base fluid handling auxiliary material 1250 can be a high loft acquisition layer, such as can be obtained from TWE GmbH & Co. KG, Germany under the name DRY WEBTDL2,60g / m2 trade name. In a preferred embodiment, the size of the absorbent pad is at least laterally smaller than the size of the pocket, thereby facilitating the use and removal of the absorbent pad. In order to avoid contact between the user who replaces the used core and the wet fluid handling auxiliary 1250", it is advantageous to select the fluid handling layer so that layer 1250' is more hydrophilic than layer 1250", so that layer 1250" does not contain a large amount of liquid until layer 1250' and core 2200 are not fully loaded.

[0261] Therefore, the system according to the present invention provides special fluid handling characteristics. Since the fluid handling aid can also be positioned in the liquid absorption area of ​​the base of the article, the system not only allows the fluid handling aid to quickly receive liquid and store the liquid by capillary force, but also releases the liquid to the absorbent pad even if the size of the liquid handling aid is smaller than the size of the base fluid handling aid material.

[0262] This can be demonstrated by determining the amount of liquid released from the fluid handling aid material into the smaller sized absorbent pad according to the "Liquid Release from Fluid Handling Aid Material to Final Liquid Storage Material" test described below.

[0263] Suitable exemplary materials for fluid handling auxiliary materials are available from Texsus spa, Italy, under the trade name ATB Multifunctional Blue A49B60, with a basis weight of 60 g / m 2 When compared with Glatfelter GmbH from Germany, code MM180.SMT.CSN00.V03.F.PEFC.S.046w, basis weight 180g / m 2 When combined with the air-laid absorbent pad material of 270 g / m 2 from Glatfelter Falkenhagen GmbH, Germany, code MM270.PTB.CST00.V00.R.FSCM.2x0046w.1050d, the fluid handling auxiliary material released 85.1% of the total fluid absorption capacity. Similarly, when combined with the 270 g / m 2 from Glatfelter Falkenhagen GmbH, Germany, code MM270.PTB.CST00.V00.R.FSCM.2x0046w.1050d, the fluid handling auxiliary material released 85.1% of the total fluid absorption capacity. 2When combined with the eCore absorbent pad material, the fluid handling aid material released 92.0% of the total fluid absorption.

[0264] This indicates that when the absorbent pad is removed from the sanitary article chassis, for example, to replace it with a new absorbent pad, the chassis fluid handling auxiliary material is dried to a significant extent and is ready to accommodate a further fluid load for release to the new absorbent pad.

[0265] Test Method

[0266] Unless expressly stated otherwise, all percentages are by weight.

[0267] All testing shall be conducted in a conditioned room maintained at approximately 23 + / - 2°C and 50 + / - 2% relative humidity.

[0268] All equipment should have an accuracy of at least one digit better than the reported measurement result.

[0269] If a material exhibits multifaceted properties and the test results are susceptible to this, testing should be performed based on the intended “use” orientation.

[0270] “NWSP” refers to the 2015 edition of the “Nonwovens Standard Procedure” (suffix R0.15) published by EDANA of Belgium.

[0271] -For nonwoven materials "Repeated liquid penetration" —NWSP 070.7 and “Rewetting after repeated penetration Run)” (NWSP 070.8).

[0272] - Based on the principle of measuring humidity increase over time ("Lyssy") "Water Vapor Transmission Rate" (WVTR)–Part 2, NWSP 070.6.

[0273] - "Vertical Wicking Test": A 50 mm wide strip of sample material is suspended vertically and immersed to a depth of 1 cm in a container containing 0.9% saline. The time is recorded after the sample has been immersed and the corresponding weight change of the liquid in the container is recorded. The container is large enough so that the change in the liquid level is negligible. After 30 minutes, the vertical wicking height reaches approximately a stable value, which is then recorded.

[0274] - "Liquid flow resistance test": One end of a strip of test material having a width of 50 mm and being long enough is positioned horizontally in a container of 0.9% saline as test liquid. The strip is further supported on a beam having a diameter of 1 cm, for example made of metal or polymethyl methacrylate, which is located 5 cm above the liquid surface of the container. The free end of the strip, 10 cm long, is suspended vertically on a measuring cup positioned on a balance for receiving the fluid to be transported. Now, the liquid is first sucked to the maximum height on the beam against gravity and then released vertically downwards. The time is recorded after the release of the first drop. The amount of liquid transferred is monitored by means of a balance. A straight line is plotted against the amount of fluid absorbed in grams versus the time in minutes, whose slope in grams per minute is the fluid transport rate as a measure of the resistance to liquid flow.

[0275] - "Horizontal liquid transfer test": One end of a 50 mm wide strip of material is positioned horizontally in a container containing a 0.9 w-% saline solution. The other end of the strip is positioned on a balance on top of a PMMA plastic plate, 2 cm laterally from the container, at a height that is the same as the liquid level in the container. The container and the PMMA plate on the balance are horizontally equal. The test material is placed at a height of 0.5 cm above the horizontal plane of the container, on a 1 cm intermediate circular beam, which is made of metal or polymethyl methacrylate, for example. Under the test strip, a standard absorbent material is placed on top of the test material. The standard absorbent material is made of an air-laid material produced by the German company Glatfelter under the trade name MM460.SMT.CST00.V01.J.NOCF, with

[0276] -Basis weight 460g / m 2 (NWSP 130.1.RO(15)),

[0277] -60w-% SAP,

[0278] -Thickness 1.8 mm (NWSP 120.6.RO(15)),

[0279] -Calculated density is 0.256 g / m 3 ;

[0280] -Dry tensile strength-MD) 48N / 50mm (NWSP 10.1.RO (15),

[0281] -20g / g "liquid retention",

[0282] All of these are based on the corresponding tests as described below.

[0283] The airlaid material was cut into a width of 46 mm and further wrapped with a 35 g / m2 spunlace cotton web, which can be purchased from Winner Medical in China under the trade name PCO-35-N, to form a standard absorbent material with a width of 50 mm.

[0284] Another 22 cm x 7 cm plastic plate weighing 140 g is placed on the strip and the standard absorbent material and another 400 g weight is placed on top of it to produce 344 N / m 2 The amount of liquid uptake is monitored on a balance over time and reported in grams of liquid at 5, 10, and 30 minutes.

[0285] - "Vertical Liquid Transfer": A 50 mm wide, 20 cm long strip of test material was clipped flush at one end with a strip of standard absorbent material for the "Horizontal Liquid Transfer Test" (the absorbent material was an airlaid material available from Glatfelter, Germany under the trade name MM460.SMT.CST00.V01.J.NOCF) wrapped in a 35 g / m 2 The spunlace cotton of 17 cm long is located between two PMMA plastic plates (22 cm × 7 cm × 0.8 cm) which stand vertically on a fixture and are connected to each other by adhesive tape at a distance of the combined thickness of the test material and the standard absorbent material, for example, about 5 mm. This arrangement is further clamped at the top so that a 3 cm strip of the test material extends above the plastic plate with the standard absorbent core and at least 1 cm of the test material strip is immersed in a test liquid of 0.9% saline in a container placed on a balance.

[0286] Liquid transfer over time was monitored on the balance and reported in grams of liquid at 1, 3 and 15 minutes.

[0287] -" Breathability ”: American Society for Testing and Materials (ASTM) D737-18, pressure 125Pa, surface area 20cm 2 .

[0288] -" pH Measurement of Cellulosic Materials ”: Wet the pulp / core, pour six times its dry weight of 0.9% NaCl aqueous solution on the upper surface of the cellulose, and after 5 minutes measure the pH using pH test paper (Merck 1.09527.0001 or equivalent) by pressing the test paper against the wetted surface with a pressure of about 0.02 bar at the absorption point of the cellulose.

[0289] -" Free Swell Absorption CapacityAccording to the test method PA07 / 05 of the company Hygiene-Technologie GmbH (Hy-Tec) of Hahn, Germany, a test sample which can be used as an absorbent area or absorbent core material is immersed in a sufficient amount of 0.9w% saline for 30 minutes, after which it is removed and placed on a coarse grid or screen, for example a grid with 1 cm wide openings and about 2 mm ribs. After a further waiting time of 10 minutes, the weight of the test sample is recorded as the free expansion absorbency in grams.

[0290] - "Liquid retention - centrifuge capacity": This test generally follows EDANA NWSP 241.0.R2 (15) "Polyacrylate superabsorbent powders - Determination of the liquid retention capacity in saline solution by gravimetric measurement after centrifugation", but is applied to absorbent materials according to test method PA07 / 05 of Hygiene-Technologie GmbH (Hy-Tec), Hahn, Germany. For this purpose, a test sample treated according to the "Free swell absorbent capacity" test is placed in a commercial centrifuge and centrifugal forces are applied by spinning at 2800 rpm with an inner diameter of 225 mm for at least 1 minute. The sample is removed and weighed and the centrifuge absorbent capacity is recorded in grams. For materials incorporated into a product or article, these are removed from the product or article, for example by cutting.

[0291] – "Liquid absorption and rewetting"

[0292] Hygiene-Technologie GmbH (Hy-Tec) of Hahn, Germany, designed test method PA07 / 03 for acquisition / rewetting measurements of adult incontinence products.

[0293] The test uses a 70mm x 220mm perforated plexiglass plate with a central cylinder of 20mm inner diameter and 130mm height, weighing 255g, suitable for placing 2kg weights on the plate on either side of the cylinder. When placing the cylinder and the plate, the weight is placed in the center of the plate, 50 ml of 0.9 wt% saline is applied to the cylinder as synthetic urine, and the collection time until the liquid completely disappears is recorded as the first outflow collection time. 20 minutes after this time point, the second 50 ml is applied, and the second outflow collection time until disappearance is recorded. After another 20 minutes, the third 50 ml is used, and the third collection time is recorded. After 5 minutes, the weight, plate and cylinder are removed, and 50g of 110mm x 230mm filter paper accurately weighed (i.e. ± 0.01g or more accurate) is placed on the test sample, and then the 145g plate without cylinder and 2 x 2kg weights are used directly. After 15 seconds, remove the weight and plate and accurately weigh the rewetted filter paper. The three acquisition times are added to the cumulative acquisition time in seconds and the rewet value is recorded in grams.

[0294] - "Menstruation-related acquisition and rewetting assays - absorbent pads"

[0295] The collection / rewetting measurement of the absorbent pad used during menstruation is based on the PA 05 / 02 and PA 05 / 01 specifications of Hygiene Technologie GmbH (Hy-Tec). The sample is placed horizontally on a plate. A ring made of Teflon (80 ± 1g, inner diameter 30 ± 0.1mm, height 21.5mm) is positioned in the middle of the sample. Then, the test fluid artificial menstruation (containing 1.4% Tylose H 20P2, 0.4% sodium bicarbonate, 0.5% sodium chloride, 0.025% hormone dew (Alura) red dye, 10% glycerol demineralized aqueous solution) is applied to the ring from 1cm above the ring. The time (= collection time) of liquid absorption into the pad is measured. After 10 minutes, filter paper (604 type, about 10 sheets, 140 × 85mm) is weighed, and a weight is placed on the wet sample as described above. After 15 seconds, the weight and filter paper are removed. Weigh the filter paper again. The increase in filter paper mass due to liquid absorption (= rewetting) was calculated.

[0296] - "Surface pH measurement of absorbent pads" : After slowly pouring half of the free swelling absorption capacity of the absorbent pad of 0.9% NaCl aqueous solution (as described above, following the "Free Swelling Absorbent Capacity Test" method) onto the surface of the absorbent pad that will face the base, avoiding liquid loss, gently press pH indicator paper (MERCK 1.09527.0001 or equivalent) against the surface of the absorbent pad that will face the base at a pressure of approximately 0.02 bar, and wait for 5 minutes before measuring the pH value.

[0297] - "Top sheet loss test" :This test is designed to determine the ability of a material to retain a liquid applied to it. The test is based on the EDANA test method Nonwoven Breathable Fabrics Runoff Test of NWSP 080.9R0 (15) and uses a 10° inclined base plate on which the specimen is placed, extending a length of at least 25 cm from the lower end of the base plate. At this point, 25 ± 0.5 g of 0.9 w% saline is applied at a flow rate of 6.3 g / sec through a central tube with an inner diameter of 5 mm and a vertical distance of 25 mm above the web. After the fluid is applied, the weight gained by the web is recorded.

[0298] - "Tensile properties" : For a width of 25 mm, a length of 150 mm, a gauge length of 75 mm and a tensile speed of 300 mm / min, the tensile properties of the material can be determined according to NWSP 110.4.

[0299] - "Basis Weight": NWSP 130.1 , suitable for the respective materials.

[0300] - "Single load drop test" : At least three drops of deionized water / saline (which has been freed from any surface-active substances and therefore exhibits a surface tension of at least 70 dyn / cm) are placed on the test sample, for example by a clean pipette. By visual observation, it is determined whether these drops penetrate into the substrate or remain on the surface for at least 60 seconds. In the latter case, the test sample is considered hydrophobic, otherwise it is hydrophilic.

[0301] - "Stiffness of nonwoven fabrics using cantilever testing" (INDA) NWSP 090.1.

[0302] - "Nonwoven Thickness" The thickness of the samples is usually measured according to EDANA standard procedure NWSP 120.1, using a round pressure foot with a diameter of 3 cm at 15 g / m 2 determined under pressure.

[0303] - "Aperture Measurement" :The geometric determination of the apertures and their pattern may be determined by any suitable optical method. A particularly suitable method may be employed in accordance with the disclosure in EP3215086 which explicitly references the aperture-related aspects of the "Aperture / Ferret Angle Test" wherein aperture size, effective opening area and inter-aperture distance measurements are obtained from a sample image obtained using a flatbed scanner in reflective mode at a resolution of 6400 dpi and 8-bit grayscale. The scanner is connected to a computer running an image analysis program and calibrated based on captured images of a NIST certified ruler. The test sample may be mounted on a steel frame and backed with black glass bricks.

Claims

1. A reusable article base for wearing on the lower torso of a wearer, having a surface facing the user and an opposing outer surface, The article base comprises - at least one liquid absorption zone adapted to cover the area of ​​the exudate release body opening, said liquid absorption zone comprising a base fluid handling auxiliary material, said base fluid handling auxiliary material being adapted to face the user when tested on a surface, presenting - a centrifuge capacity of less than about 10.0 g / g, preferably less than about 5.0 g / g, more preferably less than about 2.0 g / g, Optionally greater than about 0.5 g / g, preferably greater than about 1.0 g / g, When tested according to the "Absorbent Capacity - Centrifugal Capacity" test; - a "Liquid Flow Rate" greater than about 0.4 g / min, preferably greater than about 0.6 g / min, more preferably greater than about 0.8 g / min, when tested according to the "Liquid Flow Resistance Test" described herein; - a main base area, preferably surrounding said at least one liquid-absorbing zone; - an optional transition zone connecting the absorption zone and the main base zone; - an optional top sheet covering said liquid-absorbing zone, The article chassis further includes at least one pocket covering at least a portion of the at least one absorbent zone, the pocket including a pocket opening adapted to receive and position an absorbent pad in liquid contact with the liquid absorbent zone.

2. A reusable item base according to claim 1, wherein the main base, the absorption zone (one or more) and the transition zone when present are substantially composed of materials and structural elements that can be washed at least 30 times, preferably at least 60 times at at least 40°C, preferably at least 60°C, and more preferably at least 90°C.

3. The reusable item base according to claim 1 or 2, wherein: The pocket is accessible to a user in both the pre-use configuration and the in-use configuration.

4. The reusable item base according to any one of the preceding claims, further comprising one or more elements selected from the group consisting of: a) leg sleeves, preferably extending from base to opposite ends greater than 1 cm, preferably greater than 2 cm, more preferably greater than 3 cm; b) an openable side closure element in a closed configuration; c) including exhibiting a water vapor transmission rate (MVTR) of at least 5000 g / m2 when tested in accordance with "Water vapor transmission rate by measuring the humidity increase time principle Lyssy / EDANA" Part 2 NWSP 070.6.R0 (15) 2 / 24h, preferably greater than 8000g / m 2 / 24h materials; d) includes a surface area of ​​20 cm when measured at 125 Pa according to ASTM D 737-18 2 The air permeability is at least 0.2m 3 / (m 2 *s), preferably greater than 1m 3 / (m 2 *s) materials; e) at least one of the main chassis and the transition region comprises a material that exhibits a vertical wicking height of less than 10 mm, preferably less than 5 mm, more preferably substantially non-wicking, according to AATCC 197, 2018 Edition, 2018 - Vertical Wicking of Textiles Test Method, optionally waterproof or liquid impermeable; f) a circumferential extensibility of at least 10%, preferably 50%, more preferably 100% of the unstretched circumference at least in the waist region; g) a circumferentially seamless material, optionally a seamless circular knit material, at least in said waist region of said chassis article; h) the one or more absorption zones comprise a base fluid handling aid material having one or more properties selected from the group consisting of: h1) "Horizontal fluid transfer" greater than about 18 g, preferably greater than about 20 g, more preferably greater than about 22 g after 5 minutes; After 10 minutes, it is greater than about 30 g, preferably greater than about 34 g, and more preferably greater than about 37 g; After 20 minutes, it is greater than about 68 g, preferably greater than about 73 g, and more preferably greater than about 78 g; h2) "Vertical fluid transfer" greater than about 4.0 g, preferably greater than about 5.0 g, more preferably greater than about 5.5 g after 1 minute; After 3 minutes, it is greater than about 8.0 g, preferably greater than about 9.0 g, and more preferably greater than about 10.0 g; After 15 minutes, it exceeded about 18.0 g; h3) a "vertical wicking height" greater than about 19 cm, preferably greater than about 20 cm, more preferably greater than about 22 cm; h4) "Vertical liquid absorption" greater than about 2.0 grams, preferably greater than about 5.5 grams at 3 minutes, greater than about 6.0 g at 5 minutes, wherein all characteristics are described by parameters determined from the tests described herein; i) the pocket comprises a liquid-impermeable material on a surface opposite to the absorbent layer; j) the materials of the main chassis region and the absorbent region exhibit at least a 10% difference in - Repeated liquid penetration time (NWSP 070.7R0(15)); - rewetting after re-penetration time (NWSP 070.8R0(15)); -Vertical capillary wicking of 0.9% NaCl solution according to AATCC 197, 2018.

5. A sanitary article system comprising a reusable article base and an absorbent pad according to any one of claims 1 to 4, The absorbent pad comprises - a cover sheet on the core having a wearer-facing surface; - having an opposing surface of a cover sheet under the core; - a centrally located absorbent core comprising an absorbent pad material; -optionally includes pad fluid handling aids; And the absorbent pad is adapted to be positioned in the pocket of the reusable chassis in alignment with at least a portion of the absorbent zone of the article chassis and the core cover sheet facing the user.

6. The sanitary article system according to claim 5, further comprising a handling aid for facilitating the application and / or removal of the absorbent pad.

7. The sanitary article system according to claim 6, wherein: The handling aid is a stiffening member adapted for multiple applications of the absorbent pad.

8. The sanitary article system according to claim 6, wherein: The handling aid is integral with the absorbent pad and preferably comprises one or more elements selected from the group consisting of k) Tabs or handles as operating aids k1) as an extension of the peripheral area of ​​the pad; or k2) attached to the outer surface of the pad; l) Finger pockets on its outer surface as a handling aid.

9. The sanitary article system according to any one of claims 5 to 8, wherein the absorbent pad further comprises one or more elements selected from the group consisting of m) removable coverings; n) cellulose pulp, as described herein, exhibiting a pH value of less than 6, preferably less than 5.5 according to the "pH Measurement Test for Cellulose"; o) odor reducers, odor absorbers or odor control agents; p) odor masking agents; q) bacterial growth inhibitors; r) inhibitors of urea degradation to ammonia and carbon dioxide; s) an absorbent material, optionally a superabsorbent material, such that the absorbent pad has an absorption capacity of greater than 10 ml, preferably greater than 50 ml, or more preferably greater than 100 ml for a 0.9% NaCl aqueous solution; t) absorbent material, optionally superabsorbent material and optionally acquisition aid, wherein the article has a rewet value of less than 10 g, preferably less than 5 g, and most preferably less than 1 g when subjected to the "Acquisition Rate and Rewet Test for Adult Incontinence Products: NWSP070.9R1(15)".

10. The sanitary article system according to any one of claims 5 to 9, wherein the absorbent pad further has one or more features selected from the group consisting of u) Urine-related collection value less than 35 seconds when performing the urine-related collection and rewetting assay test PA07 / 03 (3 x 30 ml); v) a Urine-related Rewet value of less than 15 g, preferably less than 10 g, more preferably less than 5 g, most preferably less than 1 g, when subjected to the Urine-related Collection and Rewet Determination Test PA07 / 03; w) when performing the Menstruation Related Acquisition and Rewetting Test PA05 / 02, the Menstruation Related Acquisition value is at least less than 20 seconds; x) a Menstruation Related Rewet value of less than 5 g when subjected to the Menstruation Related Acquisition and Rewet Determination Test PA 05 / 01; y) a surface pH of less than about 7.0, preferably less than about 5.5, more preferably less than about 5, when tested according to the Surface pH Measurement Test described herein.

11. A sanitary article system according to any one of claims 5 to 10, wherein the absorbent pad is smaller in size than the fluid absorption area of ​​the article base, preferably covers less than 90%, preferably less than 70%, more preferably less than 50% of the fluid absorption area, optionally with a liquid permeable core cover sheet material.

12. The sanitary article system according to any one of claims 5 to 11, wherein the sanitary article base includes a base fluid handling auxiliary material, the base fluid handling auxiliary material being positioned - in direct contact with said liquid-absorbing zone of said article chassis, and / or - said opposing surface of said pocket facing towards said article chassis, whereby said under-core covering sheet is liquid permeable.

13. The sanitary article system of claim 12, wherein the sanitary article base comprises - a first base fluid handling auxiliary material positioned in direct contact with the user-facing liquid absorption zone of the article chassis and a second base fluid handling auxiliary material positioned towards the opposing surface of the pocket of the article chassis, The first base fluid handling auxiliary material thus exhibits - "Vertical Wicking Height" or - "Vertical Liquid Absorption" When tested according to the test described herein, the first base fluid handling aid material is higher than the corresponding value of the second fluid handling aid.

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