Incontinence products with transfer component

Description

[0001] The present invention relates to an incontinence product for the absorption of bodily excretions with a transfer component and pH regulator for the preferred use by adults.

[0002] A common problem with the use of incontinence products is the occurrence of skin irritation or inflammation caused by contact between the skin and bodily fluids such as urine. Often, a condition known as incontinence-associated dermatitis (IAD) can develop—a skin inflammation in the perineal or perigenital region caused by contact with an irritant such as urine. Changes in the skin's pH level upon contact with the more alkaline urine play a significant role in this process. To reduce such contact between the skin and urine, incontinence products typically contain superabsorbent materials that can absorb and retain large amounts of urine.Furthermore, a suitable design of the incontinence product, for example, through the use of absorbent and distribution layers inside, allows fluids to be absorbed more quickly and wicked away from the user's skin. Some incontinence products also feature openings, grooves, or indentations designed to improve fluid flow and distribution. Substances are also frequently incorporated into the absorbent material of the absorbent core to regulate the pH of the absorbed bodily fluids. Typically, the absorbent material is pre-mixed uniformly with these substances before the absorbent core is formed from the resulting mixture. This requires a significant amount of pH-regulating substances to ensure consistent incorporation and effective pH regulation.At the same time, a significant proportion of the pH-regulating substances remain unused, as incontinence products are typically replaced well before reaching their maximum absorbency. The effectiveness of such pH-regulating substances at the skin contact surface of the incontinence product, particularly when additional absorbency and distribution layers are used, is often not reliably ensured. Therefore, there remains a need for improved incontinence products.

[0003] Incontinence products for adults have been known for a long time and often feature a top sheet that is at least partially permeable to liquid, a back sheet that is essentially impermeable to liquid, and an absorbent core positioned between the top sheet and the back sheet. These products can be designed in a variety of ways, for example, as incontinence products that lie directly against the body or as absorbent incontinence pads.

[0004] Prior art includes approaches to providing incontinence products with a pH-control agent. WO2019167356A1 teaches an absorbent product with a pH-adjusting agent located on or within the absorbent core. The actual pH-adjusting substance is provided with a surface coating of oil or grease that is solid at room temperature, intended to ensure a slow release of the pH-adjusting substance over an extended period. WO2008 / 147991A2 teaches a polymer film incorporating an odor control agent or a skin care agent, such as a pH regulator, and a disposable absorbent product comprising such a polymer film. The polymer film is intended to be activated by contact with body fluid to release the odor control agent or the skin care agent.EP3838243A1 discloses an incontinence article comprising a pH regulator, comprising monosodium citrate or disodium citrate, arranged between a topsheet and a backsheet. The pH regulator may be arranged between a fluid-absorbing layer and an absorbent layer facing a backsheet. WO2012121932A1 discloses an absorbent article comprising a buffer composition premixed with absorbent material or arranged between two absorbent layers of the absorbent core. The inventors recognized that such an arrangement has the disadvantage that the body fluid, upon penetrating the absorbent core, may come into contact with the buffer composition, carrying it with it as it penetrates deeper layers of the absorbent core, or may only come into contact with a sufficient quantity of the buffer composition in deeper layers.Furthermore, the effect of the buffer composition can be impaired by some components of the absorbing material, such as superabsorbent polymers or chemically pretreated cellulose fibers.

[0005] The present invention is therefore based on the objective of overcoming these disadvantages.

[0006] This problem is solved by an incontinence product for the absorption of bodily excretions, comprising a topsheet that is at least partially permeable to liquid, a backsheet that is essentially impermeable to liquid, and an absorbent body arranged between the topsheet and the backsheet, wherein the absorbent body has a storage absorbent core and a transfer component, wherein the transfer component is arranged between the storage absorbent core and the topsheet, and wherein the transfer component has at least an upper transfer layer and a lower transfer layer, and wherein a pH regulator is incorporated between the upper transfer layer and the lower transfer layer.

[0007] This arrangement of the pH regulator advantageously focuses it near the topsheet, thus enabling effective pH regulation close to a skin-side surface of the incontinence product. This allows bodily fluids coming into contact with the pH regulator before being absorbed into the absorbent core and permanently bound, thereby accelerating the action of the pH regulator. Furthermore, the risk of pH regulation being impaired by components of the absorbent core is reduced.

[0008] The transfer component and the first and second transfer layers are not suitable and intended for the permanent storage of body fluids, but rather for the rapid absorption and immediate transfer of body fluids to the storage absorbent body.

[0009] For this purpose, the upper and lower transfer layers are preferably made of a fibrous material, in particular a nonwoven material, and further preferably have a density of 0.01 to 0.10 g / cm 3< , in particular of 0.02 to 0.08 g / cm 3< , and further in particular of 0.03 to 0.07 g / cm 3< .

[0010] Preferably, the upper and lower transfer layers are free of superabsorbent polymer (SAP).

[0011] Furthermore, the transfer component is preferably developed independently of SAP.

[0012] The fibers can be of natural or artificial origin and can be of a defined length (staple fibers), continuous ("endless"), or formed in situ. The fibers can be made from a single polymer or a polymer mixture (single-component fiber) or from more than one polymer and / or a polymer mixture (multi-component fiber).

[0013] A multi-component fiber has a cross-section comprising more than one single section, each of which comprises a different polymer or polymer blend. The term multi-component fiber includes, but is not limited to, a two-component fiber. The different components of multi-component fibers are arranged in substantially distinct regions across the fiber's cross-section and extend continuously along its length. A multi-component fiber may have an overall cross-section that includes sub-regions of the two or more different components of any shape or arrangement, including, for example, coaxial sub-sections, core and sheath sub-sections, adjacent sub-sections, radial sub-sections, island sub-sections, etc.

[0014] A two-component fiber with a "core / sheath structure" has a cross-section comprising: two discrete sections, each consisting of a polymer or polymer mixture, wherein the sheath polymer or sheath polymer mixture component is arranged around the core polymer or core polymer mixture component.

[0015] In a preferred embodiment, the transfer component comprises multi-component fibers, in particular two-component fibers, and further, in particular, two-component fibers containing polyester, so-called Bico / PES fibers. The multi-component fibers, in particular the two-component fibers, preferably have a circular or three-lobed cross-section.

[0016] Preferred combinations of components in two-component fibers are polyethylene terephthalate (PET) / polyethylene (PE), PET / polypropylene (PP), PET / polyester copolymers (CoPET), polylactic acid (PLA) / polylactide copolymers (COPLA), PLA / PE and PLA / PP.

[0017] The transfer component may also include or consist of other materials such as perforated films or foams or the like.

[0018] The upper and lower transfer layers can comprise or consist of the same materials, or they can comprise or consist of different materials.

[0019] The backsheet can, in particular, comprise or be formed from a breathable, but essentially liquid-tight, film material. The topsheet is preferably formed, at least in some areas, from a non-woven material that is at least partially liquid-permeable.

[0020] In a preferred embodiment, the upper transfer layer differs from the lower transfer layer with respect to at least one property selected from the group consisting of basis weight, density, tensile strength, opacity, rewetting, liquid penetration time (strike through time), longitudinal or transverse or thickness direction, material type, fiber type, fiber length, fiber diameter, fiber crimp, hydrophobicity, type or amount of additives.

[0021] Additives can include, for example, finishing agents, conditioning agents, wetting agents, coagulants, anticoagulants, adhesive or surfactant substances or antimicrobial substances, colorants or fragrances, pH indicators or skin conditioning substances.

[0022] The density of the upper and lower transfer layers is calculated as follows, as is known to those skilled in the art: Density [g / cm³] = Basis weight [g / cm²] / Thickness [cm]. The basis weight is determined in a manner familiar to those skilled in the art by determining the mass of a test specimen typically die-cut from a sheet material, for example, a nonwoven fabric, and dividing it by its area. To determine the extent in the thickness direction, i.e., the thickness, of the upper and lower transfer layers, the respective upper or lower transfer layer is subjected to a test pressure of 0.5 kPa.

[0023] In a preferred embodiment, the upper transfer layer and the lower transfer layer are connected to each other by a fold edge, in particular extending in a longitudinal direction.

[0024] In such cases, the upper and lower transfer layers are preferably formed in one piece.

[0025] Alternatively, the upper and lower transfer layers can be joined together by a joint, particularly one running longitudinally. This joining of the upper and lower transfer layers can be carried out using any joining method known to a person skilled in the art and suitable for the purpose and according to the material of the upper and lower transfer layers, for example, thermal welding, sewing, sealing, gluing, or ultrasonic welding.

[0026] In the context of this invention, the longitudinal direction is understood to be the longitudinal direction of the incontinence article, extending from a front transverse edge of the incontinence article (i.e., the front side when in use) to a rear transverse edge (i.e., the back side when in use) when the incontinence article is laid flat. The longitudinal direction of the incontinence article corresponds to the longitudinal direction of the transfer component, the upper and lower transfer layers, the absorbent core, and the storage absorbent core. Likewise, the longitudinal direction of the incontinence article may optionally correspond to the longitudinal direction of a first and / or second absorbent core layer, as described in more detail below.

[0027] A transverse direction is defined as a transverse direction of the incontinence product that runs perpendicular to the longitudinal direction. This transverse direction corresponds to the transverse direction of the transfer component, the upper and lower transfer layers, the absorbent core, and the storage absorbent core. Similarly, the transverse direction of the incontinence product may also correspond to the transverse direction of a first and / or second absorbent core layer, as described in more detail below.

[0028] Furthermore, the incontinence product has a thickness direction that runs orthogonally to both its longitudinal and transverse directions. This thickness direction corresponds to that of the transfer component, the upper and lower transfer layers, the absorbent core, and the storage absorbent core. The thickness direction may also correspond to that of a first and / or second absorbent core layer, as described in more detail below.

[0029] In a preferred embodiment, the pH regulating agent is uniformly distributed between the upper and lower transfer layers.

[0030] To understand the term "uniform", the focus should be on the distribution of the pH regulator in a plane encompassing the longitudinal and transverse directions of the upper and lower transfer layers, i.e., a plane arranged parallel to a surface of the upper or lower transfer layer facing the respective other upper or lower transfer layer.

[0031] Such a distribution reduces the risk of uneven pH regulation.

[0032] Furthermore, such an arrangement between the upper and lower transfer layers reduces the risk of unwanted or premature migration of the pH regulator within the incontinence product, especially into the absorbent storage body.

[0033] The absorbent storage body of the incontinence product is suitable and intended to absorb bodily excretions, especially bodily fluids, particularly urine, and to store them permanently in the absorbent storage body.

[0034] For this purpose, the storage suction body preferably has a first suction body layer, wherein the first suction body layer further preferably has SAP.

[0035] In an advantageous embodiment, the SAP is uniformly distributed in the first layer of the suction body, in particular such that the concentration of the SAP in weight percent in a central longitudinal section of the first layer of the suction body is the same as in a front and / or a rear longitudinal section of the first layer of the suction body.

[0036] This results in advantages in manufacturing, as, for example, the SAP can be uniformly premixed with the other material of the first layer of the suction body, and the more difficult separate dosing and / or arrangement of the SAP at high machine speed can be eliminated.

[0037] Alternatively, the SAP can also be distributed unevenly in the first layer of the absorbent material such that the concentration of the SAP in weight percent in the middle longitudinal section of the first layer of the absorbent material is higher or lower than in the front and / or the rear longitudinal section of the first layer of the absorbent material.

[0038] This makes it possible to adapt the area-related quantity of SAP in g / m² to the fluid storage capacity required in the respective middle, front or rear longitudinal section of the first layer of absorbent material.

[0039] In a preferred embodiment, the first absorbent layer contains superabsorbent polymer (SAP) at a weight of 5–100%, preferably 10–95%, more preferably 15–90%, and most preferably 20–80%. Typically, the SAP material can absorb at least 15 times, and in particular 20 times, its weight in 0.9% saline solution (measured according to NWSP 242.0.R2(15)).

[0040] SAP can, for example, be particle-shaped, fibrous, sheet-shaped, or foam-shaped.

[0041] The SAP may still comprise or consist of an essentially pure polymer material or a mixture of two or more polymer materials.

[0042] The first layer of absorbent material can contain other materials, such as cellulose fibers ("fluff") or plastic fibers.

[0043] In such a case, the SAP is preferably mixed with the other materials, in particular fiber materials, in a substantially homogeneous manner, such that the SAP is uniformly distributed along the longitudinal and transverse directions of the first absorbent layer. Preferably, the SAP is also uniformly distributed along the thickness direction of the first absorbent layer.

[0044] It is also conceivable to form the first and / or the second suction layer of the storage suction body, described in more detail below, by arranging one or more layers of different materials (material layers), in particular nonwoven material.

[0045] In such a case, the SAP can be arranged uniformly distributed in the longitudinal and / or transverse direction on a surface of at least one of the first and the second absorbent layer described in more detail below, or of a material layer, or between the first and second absorbent layer, or between two material layers.

[0046] A central longitudinal section of the first absorbent layer is positioned to cover a point or area of ​​contact with urine during use (micturition area) and extends across a transverse central axis of the first absorbent layer. The anterior longitudinal section of the first absorbent layer connects directly to the central longitudinal section in the longitudinal direction towards an anterior transverse edge of the first absorbent layer, which, in the state of use, lies on the ventral side, and extends to the anterior transverse edge of the first absorbent layer.

[0047] The posterior longitudinal section of the first layer of absorbent material connects directly to the central longitudinal section in the direction of a posterior transverse edge of the first layer and extends to the posterior transverse edge of the first layer. The boundaries between the central and anterior longitudinal sections and between the central and posterior longitudinal sections each run in a straight line in the transverse direction of the first layer and are orthogonal to a longitudinal center axis of the first layer.

[0048] The central longitudinal section of the first layer of suction bodies is arranged symmetrically with respect to its longitudinal extent relative to the transverse central axis of the first layer of suction bodies.

[0049] Within the scope of the present invention, the longitudinal extent of the central longitudinal section of the first layer of suction elements is 40% of the total longitudinal extent of the first layer of suction elements. The rear longitudinal section and the front longitudinal section of the first layer of suction elements each comprise 30% of the total longitudinal extent of the first layer of suction elements.

[0050] The middle, rear and front longitudinal section of the first suction layer extends in the transverse direction of the first suction layer over the entire width of the first suction layer at the respective point, thus from a first longitudinal edge of the first suction layer to a second longitudinal edge of the first suction layer.

[0051] Longitudinal extent refers to the maximum longitudinal extent of an element, longitudinal section, or area.

[0052] The term transverse extension refers to the maximum transverse extension of an element, longitudinal section, or area.

[0053] The first layer of suction elements can be rectangular, triangular, oval, T-shaped, hourglass-shaped, anatomical, asymmetrical or in any other shape that may appear suitable to a person skilled in the art.

[0054] In a preferred embodiment, the area-related amount of pH regulating agent in a central longitudinal section of the absorption body in g / m² is greater than in a front and / or a rear longitudinal section of the absorption body.

[0055] The central longitudinal section of the absorbent core is positioned in a crotch area of ​​the incontinence product, thus covering the point or area of ​​impact of urine during use (urination area), and extends across a transverse central axis of the absorbent core. The anterior longitudinal section of the absorbent core connects directly to the central longitudinal section in the direction of a front transverse edge of the absorbent core, which, in the state of use, lies on the ventral side, and extends to the front transverse edge of the absorbent core.

[0056] The rear longitudinal section of the absorbent core connects directly to the central longitudinal section in the direction of a rear transverse edge of the absorbent core (i.e., the rear edge when in use) and extends to this rear transverse edge. The boundaries between the central and front longitudinal sections, and between the central and rear longitudinal sections, each run in a straight line across the incontinence product and are perpendicular to a longitudinal center axis of the absorbent core.

[0057] The central longitudinal section of the absorption body is arranged symmetrically with respect to its longitudinal extent relative to the transverse central axis of the absorption body.

[0058] In the context of the present invention, the longitudinal extent of the central longitudinal section of the absorption body is 40% of the total longitudinal extent of the absorption body. The rear longitudinal section and the front longitudinal section of the absorption body each comprise 30% of the total longitudinal extent of the absorption body.

[0059] The middle, rear and front longitudinal section of the absorption body extends in the transverse direction of the absorption body over the entire width of the absorption body, thus from a first longitudinal edge of the absorption body to a second longitudinal edge of the absorption body.

[0060] Longitudinal extent refers to the maximum longitudinal extent of an element, longitudinal section, or area.

[0061] The term transverse extension refers to the maximum transverse extension of an element, longitudinal section, or area.

[0062] The absorption body can be rectangular, triangular, oval, T-shaped, hourglass-shaped, anatomical, asymmetrical or in any other shape that may appear suitable to a person skilled in the art.

[0063] It should be noted that the absorption layer and / or the first layer of absorbent material can have a uniform thickness and / or density. It is also conceivable that the absorption layer and / or the first layer of absorbent material has a thickness or height profile or a density profile.

[0064] In a preferred embodiment, 5.00-30.00 g / m 2< , in particular 6.00-25.00 g / m 2< , further in particular 7.00-20.00 g / m 2< , further in particular 8.00-15.00 g / m 2< pH regulating agent is arranged in the central longitudinal section of the absorption body.

[0065] Preferably, the front and / or rear longitudinal section of the absorption body is essentially free of pH regulator.

[0066] However, it is also conceivable that the front and / or rear longitudinal section of the absorption body contains pH regulators. In such a case, 0.00–10.00 g / m², in particular 0.10–9.00 g / m², further in particular 0.20–7.00 g / m², further in particular 0.30–5.00 g / m² of pH regulators can be arranged in the front and / or rear longitudinal section of the absorption body.

[0067] In a preferred embodiment, the first suction body layer has a channel oriented in the longitudinal direction.

[0068] The channel facilitates the rapid absorption of bodily fluids such as urine and serves to transport them to more distant regions of the absorbent body.

[0069] Preferably, the transfer component covers at least part of the channel, and in particular completely.

[0070] In this arrangement, bodily fluids such as urine can be rapidly absorbed, distributed, and conveyed into the channel. Furthermore, absorbed bodily fluids can advantageously come into contact with the pH regulator as they pass through the transfer component, allowing for rapid pH regulation. The channel thus facilitates early and uniform pH regulation through the pH regulator incorporated in the transfer component, before the bodily fluids are bound in the absorbent core and, in particular, by SAP.

[0071] Preferably, the channel is arranged parallel to a longitudinal center axis of the absorption body and / or the first layer of absorbent material and / or the incontinence product.

[0072] In particular, the channel is arranged on a longitudinal central axis of the incontinence product and / or the absorbent body and / or the first layer of absorbent material.

[0073] Furthermore, in particular, the channel is designed symmetrically to the longitudinal center axis of the incontinence product and / or the absorbent body and / or the first layer of absorbent material.

[0074] The channel is advantageously arranged centrally in the transverse direction of the absorption body and / or the first layer of the absorption body.

[0075] Advantageously, the channel is arranged longitudinally in the incontinence product in the area where urine hits the product during use.

[0076] Furthermore, the channel advantageously extends across the transverse central axis of the absorption body.

[0077] A preferred channel is arranged such that it is located further away from the rear transverse edge of the absorption body than from the front transverse edge of the absorption body. However, the channel can also be arranged equidistant from the front and rear transverse edges of the absorption body, or further away from the front than from the rear transverse edge of the absorption body.

[0078] In a preferred embodiment, the channel extends in a straight line along the longitudinal direction of the incontinence product and / or the absorbent core and / or the first layer of absorbent cores. This allows the fluid to spread more freely along the longitudinal direction of the incontinence product within the channel.

[0079] However, wavy, jagged or arc-shaped or any other channel shape that the expert considers sensible is also conceivable.

[0080] Different channel shapes, such as rectangular, almond-shaped, bone-shaped, T-shaped, triangular, oval, star-shaped or branched, are well known in the prior art.

[0081] The inventors have determined that for rapid longitudinal fluid flow, channels whose longitudinal extent within the incontinence product is greater than their transverse extent are particularly advantageous. Rectangular, almond-shaped, or oval channels have proven especially beneficial.

[0082] In a preferred embodiment, the channel comprises or is formed by a recess extending through the first suction body layer in the thickness direction.

[0083] The channel is preferably essentially free of absorbing materials.

[0084] The channel can be formed by omitting the absorbing material or by removing absorbing material by cutting or punching.

[0085] However, it is also conceivable that the channel is formed by embossing or compressing the first layer of suction elements.

[0086] In a preferred embodiment, the channel of the first suction body layer is essentially free of SAP.

[0087] This offers the advantage that the body fluid absorbed into the channel is not prematurely and permanently bound within the channel, but rather flows freely along the channel and is thus distributed more evenly within the absorbent body. In particular, premature binding of the absorbed body fluid via SAP within the channel can hinder or at least delay the pH regulation of the body fluid.

[0088] According to a preferred embodiment, the first suction body layer has a single channel.

[0089] In an alternative embodiment, the first suction body layer has more than one channel, in particular 2-5, and further in particular exactly 2 channels.

[0090] In a preferred embodiment, the first suction body layer has a first region, wherein the first suction body layer has SAP in the first region.

[0091] Preferably, the first area borders the canal, and in particular, the first area completely surrounds the canal.

[0092] This allows the pH value of the body fluid, especially urine, absorbed into the channel to be regulated before it is permanently bound by SAP.

[0093] In a further preferred embodiment, the storage suction body has a second suction body layer, wherein the second suction body layer is arranged below the first suction body layer, i.e. between the first suction body layer and the backsheet.

[0094] Preferably, the second layer of the absorbent core has less than 20% by weight, 15% by weight, 10% by weight, 5% by weight SAP, and in particular, the second layer of the absorbent core is free of SAP.

[0095] The second absorbent layer advantageously improves wearing comfort, particularly with incontinence products worn close to the body, as it provides a softer feel to the skin. This is achieved by using little or no SAP (supplemental silicone resin). It is also known to those skilled in the art that particulate material can exert abrasive forces that can damage the essentially fluid-impermeable backsheet, especially the fluid-impermeable backsheet film of the absorbent product, and lead to leakage. Therefore, the second absorbent layer also offers the advantage of reducing the risk of damage to the backsheet film during the manufacturing process or use of the incontinence product.

[0096] It has proven advantageous if the pH regulator is in particulate form.

[0097] Preferably, at least 50% by weight of the pH regulator has a particle size of 10 to 2000 µm, in particular of 50 to 1200 µm, and further in particular of 80 to 800 µm.

[0098] In principle, pH regulators with smaller or larger particle sizes are also available and usable.

[0099] However, the preferred particle sizes offer the advantage that particles of such a size dissolve more slowly when wetted with bodily excretions such as urinary fluid than pH regulators of smaller particle size, so that the pH regulator is not washed out as quickly during use and a pH-regulating effect is maintained for longer on the upper side of the incontinence product facing the user's skin.

[0100] Furthermore, a pH regulator of the preferred particle size is easier to dose and incorporate into the incontinence product, especially the transfer component, particularly in fast-running machines than, for example, finely powdered pH regulators, as there is less dust generation and associated material loss in the manufacturing process.

[0101] Furthermore, the reliable distribution of a specified quantity of pH regulator within a specified target range is positively influenced.

[0102] On the other hand, particles of this size also offer the advantage that they are less noticeable to the touch during use of the incontinence product than, for example, granules with a larger particle size, thus improving the wearing comfort of the incontinence product, especially when arranged near a skin-side surface of the incontinence product.

[0103] As an alternative to particulate pH regulator, the pH regulator can also be introduced into the transfer component in dissolved form, particularly as an aqueous or alcoholic solution, especially by spraying and optionally subsequent drying of at least one of the upper or lower transfer layers. As a further alternative, the pH regulator can also be introduced into the transfer component as a suspension or paste.

[0104] Bodily excretions such as urine typically have a more alkaline pH than the skin and can therefore lead to skin irritation or inflammation. For this reason, prior art describes pH regulators for incontinence products used to control the pH of bodily excretions, such as weak acids or bases and their respective salts or combinations thereof, for example, carboxylic acids such as citric acid, acetic acid, malic acid, lactic acid, and / or their respective salts, such as sodium salts. In principle, any substance or composition is conceivable that exhibits a suitable buffering effect and poses a low risk of skin irritation. However, within the scope of the present invention, superabsorbent polymers (SAPs), in particular polymers that absorb at least 15 times their weight in 0.9 wt% saline solution (measured according to NWSP 242.0.R2(15)), are not to be understood as pH regulators.

[0105] The inventors have found that it is advantageous in this regard if the pH regulator comprises trisodium citrate, monosodium citrate, or disodium citrate. In a preferred embodiment, the pH regulator can comprise either monosodium citrate and trisodium citrate, or disodium citrate and trisodium citrate, or monosodium citrate, disodium citrate, and trisodium citrate.

[0106] By selecting or combining the aforementioned components, the buffering effect of an incontinence product can be fine-tuned depending on the desired duration of use or absorption capacity of the product, without the risk of creating highly acidic areas, as is the case when using citric acid.

[0107] If the pH regulator comprises more than one citrate, it preferably consists of a homogeneous mixture of the respective citrates. This has the advantage of avoiding local variations in the buffering capacity of the pH regulator.

[0108] The terms monosodium citrate, disodium citrate, and trisodium citrate encompass both the non-hydrogenated form and hydrates of the respective substance.

[0109] Preferably, the pH regulator consists of monosodium citrate or disodium citrate.

[0110] One advantage of using monosodium citrate is that it is less hygroscopic than citric acid, thus preventing unwanted moisture from entering the incontinence product before use. Another advantage of monosodium citrate's lower hygroscopicity is its better flowability, making it easier to dose and distribute.

[0111] In a preferred embodiment, the pH regulator consists of monosodium citrate.

[0112] In another preferred embodiment, the pH regulator consists of disodium citrate.

[0113] Using only one component as a pH regulator offers process advantages, as there is no need to mix different components or maintain a homogeneous mixture during the manufacturing process. Furthermore, it promotes a uniform buffering effect across the areas of the incontinence product containing the pH regulator.

[0114] In a preferred embodiment, the area-related amount of pH regulator in the transfer component is 5 to 100 g / m², in particular 7 to 90 g / m², and further in particular 10 to 80 g / m².

[0115] The total amount of pH regulator per incontinence product, which is particularly intended for use by adults, is preferably 0.20 to 3.00 g, more preferably 0.30 to 2.50 g, more preferably 0.40 to 2.00 g, more preferably 0.50 to 1.50 g, more preferably 0.50 to 1.00 g, more preferably 0.50 to 0.80 g.

[0116] The quantities of pH regulator specified are to be understood as referring to an anhydrous pH regulator, for example, non-hydrogenated monosodium citrate. If the pH regulator comprises one or more hydrates or, as described below, more than 5%, in particular more than 10%, additive substances, the total quantity of pH regulator in g / m² is adjusted such that the total quantity of the pure and / or non-hydrogenated pH regulator contained corresponds to the preferred quantity stated above.

[0117] Preferably, monosodium citrate, disodium citrate, or trisodium citrate is used in substantially pure form, particularly with a purity of at least 90%, further particularly at least 95%, further particularly at least 98%, further particularly at least 99%, further particularly at least 100%. In particular, the monosodium citrate, disodium citrate, or trisodium citrate is used with a purity that meets the requirements of the German Pharmaceutical Codex (DAC) or Commission Regulation (EU) 231 / 2012.

[0118] This largely prevents skin irritation caused by residues of other substances when using the incontinence product.

[0119] However, it is also conceivable that the pH regulator contains a small amount of one or more additive substances, for example, packaging and / or conditioning agents such as release agents, stabilizers, dust suppressants, anti-caking agents, wetting agents, coagulants, anticoagulants, adhesive or surfactant substances, antimicrobial substances, colorants or fragrances, or pH indicators. In such cases, the proportion of one or more of these other substances in the total amount of the pH regulator is preferably less than 10%, more preferably less than 5%, more preferably less than 2%, and more preferably less than 1%.

[0120] The transfer component can essentially completely or only partially cover the first layer of absorbent material and / or the absorption layer in the transverse direction.

[0121] Preferably, the transfer component only partially covers the absorption body and / or the first layer of the absorbent material in the longitudinal direction.

[0122] Therefore, the transfer component essentially has a smaller surface area, at least in some areas, than the first layer of absorbent material and / or the absorption material in the longitudinal and / or transverse direction of the flat-lying incontinence product.

[0123] Preferably, the transfer component covers the first layer of the absorbent body and / or the absorption body to 5-100%, in particular to 10-90%, further in particular to 15-80%, further in particular to 15-70% of its surface area.

[0124] Preferably, the transfer component is arranged at least in an area where the urinary fluid comes into contact with the incontinence product during use. In particular, the transfer component extends over and within a transverse central axis of the absorbent body.

[0125] In a preferred embodiment, the incontinence product maintains a skin-friendly pH value for at least two, and in particular at least three, micturition events.

[0126] This improves wearing comfort even over longer periods of use, such as during sleep.

[0127] More preferably, the pH value on a skin-facing upper surface of the incontinence article is 4.0-6.5, in particular 4.2-6.2, more particularly 4.3-6.0, more particularly 4.5-5.8, more particularly 4.7-5.7.

[0128] Preferably, the first and / or second absorbent layer contains less than 20% by weight, in particular less than 15% by weight, further in particular less than 10% by weight, and further in particular less than 5% by weight of the pH regulator. Furthermore, and in particular, the first and / or second absorbent layer is free of pH regulator.

[0129] This advantageously results in greater wearing comfort, particularly with incontinence products worn close to the body, as the topsheet and / or backsheet sides of the product offer a softer tactile feel. As described above, particulate material can exert abrasive forces that can damage the essentially fluid-impermeable backsheet, especially the fluid-impermeable backsheet film of the absorbent product, and lead to leakage. Therefore, a further advantage is that the risk of damage to the backsheet film during the manufacturing process or during use of the incontinence product is reduced.

[0130] Furthermore, this can reduce the risk of an undesirable decrease in pH value independent of a micturition event on a surface of the incontinence product facing the skin or in contact with the user's skin, for example if the user of the incontinence product is sweating.

[0131] In a preferred embodiment, the pH regulator is at least partially immobilized and at least on one of the upper or lower transfer layers, in particular by means of adhesive.

[0132] During the manufacturing and packaging process, and especially when putting on and wearing an incontinence product, multiple forces act on the product and / or the transfer component. For example, the transfer component can be compressed or crumpled during packaging or use. Partial or complete immobilization can reduce the risk of pH regulator migration, such as the formation of localized deposits.

[0133] Incontinence products can take various forms, such as incontinence pads, incontinence inserts, panty liners, open-type incontinence diapers, closed-type incontinence diapers, or bed pads.

[0134] Depending on the type or design, the incontinence product may have one or more other features that are well known in the prior art, such as side panels, closure systems, wings, elasticizations, leakage protection systems (e.g. cuffs), wetness indicators, marking means, skin-care or odor-regulating substances or compositions, fastening means (e.g. adhesive, hooks) and other features known or appearing useful to a person skilled in the art.

[0135] Further features, details, and advantages of the invention will become apparent from the attached claims and from the graphic representation and subsequent description of preferred embodiments of the invention and examples. The drawing shows: Figure 1a Schematic top view of an incontinence product with transfer component and pH regulator. Figure 1bSchematic top view of an incontinence product with transfer component and pH regulator, as well as a channel Figure 2a schematically, a cross-section through an incontinence product with a first absorbent layer, transfer component and pH regulator. Figure 2b schematically, a cross-section through an incontinence product with a first absorbent layer containing SAP and a second absorbent layer, a transfer component and pH regulator. Figure 2c schematically, a cross-section through an incontinence product analogously Figure 2a , however with a one-piece transfer component Figure 2d schematically, a cross-section through an incontinence product analogously Figure 2b , however with a one-piece transfer component Figure 3a schematically, a cross-section through an incontinence product with a first absorbent layer, transfer component, pH regulator and a channel Figure 3bschematically, a cross-section through an incontinence product with a first absorbent layer containing SAP and a second absorbent layer, a transfer component, pH regulator and a channel

[0136] Figure 1a Figure 1 shows schematically, not to scale, an incontinence article 1a according to the invention with a topsheet 2 that is at least partially permeable to liquid, a backsheet 3 that is essentially impermeable to liquid and an absorption body 4 arranged between the topsheet 2 and the backsheet 3, wherein the absorption body 4 has a transverse central axis 36 and a longitudinal central axis 35.

[0137] The absorption body 4 has a storage absorption body 23 and a transfer component 15, wherein the transfer component 15 is arranged between the storage absorption body 23 and the topsheet 2, and wherein the transfer component 15 has at least one function related to Figure 2a -dThe system comprises an upper transfer layer 15a and a lower transfer layer 15b, as described in more detail below. A pH regulator 7, shown here as a point, comprising or consisting of, for example, particulate monosodium citrate, trisodium citrate, or disodium citrate, or a combination thereof, is arranged between the upper transfer layer 15a and the lower transfer layer 15b. The pH regulator 7 is uniformly distributed between the upper transfer layer 15a and the lower transfer layer 15b, namely in a plane enclosing a longitudinal 11 and a transverse 10 direction of the upper 15a and lower transfer layer 15b. In this preferred example, the area-related amount of pH regulator 7 is 23 g / m².

[0138] The storage suction body 23 has a first suction body layer 5, which is related to Figure 2a -dThe SAP 20, as described in more detail, comprises fiber material 19. The SAP 20 is uniformly distributed in the first absorbent layer 5, in particular such that the concentration of the SAP 20 in weight percent in a central longitudinal section 32a of the first absorbent layer 5 is the same as in a front 31a and / or a rear longitudinal section 33a of the first absorbent layer 5.

[0139] The first suction layer 5 has a first area 22 and the first suction layer 5 has SAP 20 in the first area 22.

[0140] In this example, the storage suction body 23 consists of the first suction body layer 5, such that the extension of the first suction body layer 5 in the longitudinal 11 and transverse 10 directions corresponds to the respective total extension of the storage suction body 23 and the respective total extension of the absorption body 4. Likewise, the front longitudinal section 31a, the middle longitudinal section 32a, and the rear longitudinal section 33a of the first suction body layer 5 correspond to the respective front 31b, middle 32b, and rear longitudinal sections 33b of the absorption body 4.

[0141] Optionally, the storage suction body 23 can also be equipped with a feature related to Figure 2b and 2dThe second suction body layer 6, described in more detail, may be included. In such a case, the extent of the first suction body layer 5 in the longitudinal 11 and / or transverse 10 direction may differ from the extent of the second suction body layer 6 and / or from the total extent of the storage suction body 23 and / or from the total extent of the absorption body 4.

[0142] The absorbent body 4 has a front transverse edge 4a, which in the state of use lies on the ventral side, and a rear transverse edge 4b, which in the state of use lies on the posterior side. These edges each extend in a transverse direction 10 of the absorbent body 4, which here corresponds to a transverse direction of the incontinence product 1a and a transverse direction of the first absorbent layer 5. The front 4a and the rear transverse edge 4b ​​of the absorbent body 4 are straight in certain areas. Alternatively, the front 4a and / or the rear transverse edge 4b ​​of the absorbent body can also be completely straight, angled, curved, bent, wavy, or have any other contour that would appear suitable to a person skilled in the art.

[0143] In this example, the transfer component 15 extends in longitudinal direction 11 over the entire central longitudinal section of the first absorbent layer 32a, thus having the same longitudinal extent as the central longitudinal section of the first absorbent layer 32a. It is also conceivable that the transfer component 15 has a shorter or longer longitudinal extent than the central longitudinal section of the first absorbent layer 32a and / or is arranged offset in longitudinal direction 11 towards the front transverse edge 4a of the absorption body 4 or the rear transverse edge 4b ​​of the absorption body 4 relative to the central longitudinal section of the first absorbent layer 32a.

[0144] In this example, the transfer component 15 and the pH regulator 7 are located on both sides of the longitudinal axis 35 of the absorbent body 4, specifically in a central region 12 of the absorbent body 4 in the transverse direction 10, while peripheral regions 13 of the absorbent body 4 in the transverse direction 10 are free of pH regulator 7. This concentrates the pH regulator 7 where bodily fluids typically primarily come into contact with the incontinence product 1a, namely in the central region 12. The transfer component 15 and the pH regulator 7 are also located in a micturition area 9 (also referred to as the micturition point), where urinary fluid is highly likely to come into contact with the incontinence product 1a during use. However, it is also possible to arrange the pH regulator 7 in both the central region 12 and the peripheral regions 13.

[0145] The area-related amount of pH regulator 7 in g / m² is greater in the central longitudinal section 32b of the absorbent body 4 than in the front 31b and the rear longitudinal section 33b of the absorbent body 4. In this example, the front 31b and the rear longitudinal section 33b of the absorbent body 4 are free of pH regulator 7.

[0146] The central longitudinal section 32b of the absorbent body 4 is located in a crotch area 14 of the incontinence product 1a, thus extending over the micturition area 9, and also extends over the transverse central axis 36 of the absorbent body 4. The central longitudinal section 33b of the absorbent body 4 is arranged symmetrically with respect to the transverse central axis 36 of the absorbent body 4.

[0147] The front longitudinal section 31b of the absorption body 4 connects in longitudinal direction 11 to the middle longitudinal section 32b in the direction of the front transverse edge 4a of the absorption body 4 and extends to the front transverse edge 4a of the absorption body 4.

[0148] The rear longitudinal section 33b of the absorbent body 4 adjoins the central longitudinal section 32b in the longitudinal direction 11 in the direction of the rear transverse edge 4b ​​of the absorbent body 4 and extends to the rear transverse edge 4b ​​of the absorbent body 4. The boundaries between central 32b and front longitudinal section 31b and between central 32b and rear longitudinal section 33b each run in a straight line in the transverse direction 10 of the incontinence article 1a and orthogonal to the longitudinal central axis 35 of the absorbent body 4.

[0149] In this preferred example, the longitudinal center axis 35 of the absorbent body 4 corresponds to a longitudinal center axis of the incontinence article 1a and a longitudinal center axis of the first absorbent layer 5. Likewise, the longitudinal direction 11 of the absorbent body 4 corresponds to a longitudinal direction of the incontinence article 1a and a longitudinal direction of the first absorbent layer 5.

[0150] Furthermore, the transverse central axis 36 of the absorbent body 4 corresponds to a transverse central axis of the incontinence article 1a and a transverse central axis of the first absorbent layer 5. Likewise, the transverse direction 10 of the absorbent body 4 corresponds to a transverse direction of the incontinence article 1a and a transverse direction of the first absorbent layer 5.

[0151] In this preferred embodiment, the first layer of the absorbent material 5 is congruent with the absorbent material 4, i.e., it extends the same distance in a longitudinal direction 11 and in a transverse direction 10 of the absorbent material 4. Therefore, the total longitudinal extent 34 of the absorbent material 4 corresponds to the total longitudinal extent of the first layer of the absorbent material 5, and a maximum transverse extent of the first layer of the absorbent material 5 corresponds to a maximum transverse extent of the absorbent material 4. Alternatively, the first layer of the absorbent material 5 and the absorbent material 4 can extend to different distances in the transverse direction 10 or longitudinal direction 11 of the absorbent material.

[0152] In this embodiment, the absorption body 4 and a chassis 8 formed jointly by the topsheet 2 and the backsheet 3 are anatomically shaped. However, they can also be rectangular, triangular, oval, T-shaped, hourglass-shaped, asymmetrical, or in any other shape that a person skilled in the art would consider suitable.

[0153] The in Figure 1a The incontinence articles shown may have additional optional features that are sufficiently described in the prior art, such as elasticizing agents, fluid barriers (e.g. cuffs) or fastening devices.

[0154] In Figure 1b is an incontinence product 1b shown, which relates to Figure 1a exhibits described characteristics and relates to Figure 1a The first suction body layer 5 may have the described optional features. In addition, the first suction body layer 5 has a channel 16 oriented in the longitudinal direction 11.

[0155] In this example, the transfer component 15 covers 18% of the total area of ​​the absorbent body 4. This area fraction was found to advantageously provide efficient liquid absorption and distribution while also being cost-effective. However, a suitable transfer component 15 can cover between 5% and 100% of the total area of ​​the absorbent body 4.

[0156] In this embodiment, the transfer component 15 is arranged symmetrically to the transverse central axis 36 of the absorption body 4. However, the transfer component 15 can also be arranged asymmetrically to the transverse central axis 36 of the absorption body 4 or to a transverse central axis of the incontinence article 1b, and thus closer to the front transverse edge 4a or the rear transverse edge 4b ​​of the absorption body 4 than to the respective other rear 4b or front transverse edge 4a of the absorption body 4.

[0157] Both the transfer component 15 and the channel 16 extend over the micturition area 9.

[0158] Channel 16 is arranged parallel to and on the longitudinal center axis 35 of the absorbent body 4 and the incontinence product 1b. Furthermore, channel 16 is symmetrical to the longitudinal center axis 35 of the absorbent body 4 and the incontinence product 1b.

[0159] Advantageously, the channel 16 is arranged centrally in the transverse direction 10 of the absorption body 4 and extends symmetrically over the transverse central axis 36 of the absorption body 4.

[0160] The example shows a preferred channel 16 that is located further away from the rear transverse edge 4b ​​of the absorption body 4 than from the front transverse edge 4a of the absorption body 4. However, the channel 16 can also be located equidistant from the front 4a and rear transverse edges 4b of the absorption body 4, or further away from the front 4a than from the rear transverse edge 4b ​​of the absorption body 4.

[0161] In this example, the channel 16 is rectangular and extends in a straight line along the longitudinal direction 11 of the absorbent body 4 and incontinence product 1b. However, a wavy, jagged, or arc-shaped channel, or any other channel shape that a person skilled in the art considers appropriate, is also conceivable. Various other channel shapes, such as almond-shaped, bone-shaped, T-shaped, triangular, oval, star-shaped, or branched, are well known in the prior art.

[0162] The channel 16 in this example advantageously has a greater extent in the longitudinal direction 11 of the absorption body 4 than in the transverse direction 10.

[0163] Channel 16 is completely enclosed by the transfer component 15. In this process, body fluid introduced into channel 16 during use may first come into contact with the pH regulator 7 located in the transfer component 15.

[0164] A single central channel 16, as seen here in the Figure 1b The depicted design has a beneficial effect on the stability and shape of the incontinence product 1b in its state of use. However, it is also conceivable to provide more than one channel, in particular two channels.

[0165] The first suction layer 5 has a first area 22 in which SAP 20 is arranged. The first area 22 of the first suction layer 5 borders the channel 16 and completely surrounds the channel 16.

[0166] The Figure 2aFigure 1 shows, schematically and not to scale, an exemplary cross-section along the transverse central axis of an incontinence product 1c. The incontinence product 1c exhibits the following features related to Figure 1a described features. In addition, the incontinence article 1c in this preferred embodiment has a transfer component 15.

[0167] The incontinence product 1c has a fluid-permeable topsheet 2, a substantially (and thus in use) fluid-impermeable backsheet 3, and an absorbent core 4 arranged between them. The absorbent core 4 of the incontinence product 1c comprises a storage absorbent core 23 and a transfer component 15. In this example, the storage absorbent core consists of the first absorbent core layer 5, which contains fibrous material 19, such as cellulose fibers or synthetic fibers, and particulate SAP 20. The transfer component comprises an upper transfer layer 15a and a lower transfer layer 15b, and pH regulator 7, which is incorporated between the upper 15a and the lower 15b transfer layers. In the example shown, the SAP 20 is uniformly distributed between the upper 15a and the lower transfer layer 15b. The transfer component 15, namely the pH regulator 7, is arranged between the first absorbent layer 5 and the topsheet 2.It is advantageous if body fluids penetrating from the topsheet side first encounter the pH regulator 7 before being permanently bound in the storage absorbent body 23, in particular by SAP 20, as this allows for rapid and more effective pH control.

[0168] In this case, the upper transfer layer 15a and the lower transfer layer 15b are made of the same nonwoven material and have the same properties.

[0169] The upper 15a and the lower transfer layer 15b may also differ advantageously from each other with respect to at least one property selected from the group consisting of basis weight, density, tensile strength, opacity, rewetting, liquid penetration time (strike through time), longitudinal or transverse or thickness direction, material type, fiber type, fiber length, fiber diameter, fiber crimp, hydrophobicity, type or amount of additives.

[0170] The pH regulator 7 can advantageously be at least partially immobilized and at least on one of the upper 15a or lower transfer layer 15b, in particular by means of an adhesive (in Figure 2a (not shown).

[0171] Furthermore, the incontinence product 1c may include one or more additional absorbent layers or transfer layers.

[0172] The Figure 2b Figure 1 shows schematically, not to scale, a cross-section along the transverse central axis of another preferred incontinence article 1d. The incontinence article 1c exhibits the features relating to Figure 2a The described characteristics and can additionally include those related to Figure 2a The described optional features are present. In addition, in this preferred embodiment, the absorbent storage body 23 of the incontinence article 1c has a second absorbent storage body 6 in addition to the first absorbent layer 5.

[0173] The second absorbent layer 6 is arranged below the first absorbent layer 5, i.e., between the first absorbent layer 5 and the backsheet 3. In this preferred embodiment, the second absorbent layer 6 does not contain SAP. Furthermore, the second absorbent layer 6 also does not contain a pH regulator 7. This improves the wearing comfort of the incontinence product from the backsheet side and reduces the risk of damage to the backsheet from particles. Alternatively, small amounts of SAP and / or pH regulator can be provided in the second absorbent layer 6.

[0174] The second absorbent layer 6 consists essentially of fiber material 19, such as cellulose fibers or plastic fibers.

[0175] The Figure 2c Figure 1e schematically, not to scale, shows a cross-section along the transverse central axis of another preferred incontinence article 1e. The incontinence article 1e exhibits, with respect to Figure 2aThe described features are present. Additionally, the upper 15a and the lower transfer layer 15b are connected to each other by a folded edge 24. The folded edge 24 runs in the longitudinal direction of the incontinence article 1e, which is not shown here. In this preferred example, the transfer component 15 is formed in one piece. Alternatively, the upper 15a and lower transfer layer 15b can also be connected to each other by a joint, in particular one running in a longitudinal direction. The joining of the upper and lower transfer layers can be carried out by any joining method known to a person skilled in the art and suitable for the purpose and according to the material of the upper and lower transfer layers, for example, thermal welding, sewing, sealing, gluing, or ultrasonic welding.

[0176] The Figure 2dFigure 1f schematically shows, not to scale, a cross-section along the transverse central axis of another preferred incontinence article 1f. The incontinence article 1f exhibits the features relating to Figure 2b The described features are present. In addition, the upper 15a and the lower transfer layer 15b are connected to each other by a folded edge 24. The folded edge 24 runs in the longitudinal direction of the incontinence article 1f, which is not shown here. In this preferred example, the transfer component 15 is formed in one piece. Alternatively, the upper 15a and the lower transfer layer 15b can also be connected by means of a fold edge 24 as described above. Figure 2c The joint described should be joined together.

[0177] The Figure 3a The figure shows schematically, not to scale, a cross-section along the transverse central axis of another preferred incontinence article 1g. The incontinence article 1g exhibits the features relating to Figure 2adescribed features. In addition, the incontinence article 1g in this preferred embodiment also has a channel 16.

[0178] In this example, channel 16,16a does not extend completely through the first layer of the absorbent core 5. Channel 16 can be formed, for example, by embossing or compressing the first layer of the absorbent core 5.

[0179] Channel 16,16a is essentially free of absorbing materials, namely SAP 20 and fiber material 19. Channel 16 can alternatively be described below in relation to Figure 3b described in more detail as a recess extending through the first suction body layer 5 in the thickness direction 21.

[0180] In this preferred embodiment, the first layer of the absorption body 5 has a single channel 16, which is arranged on a longitudinal central axis of the absorption body 4 (not shown here). Furthermore, the channel 16 is symmetrical to the longitudinal central axis of the absorption body 4. Advantageously, the channel 16 is arranged centrally in the transverse direction 10 of the absorption body 4.

[0181] Alternatively, the first suction layer can have more than one channel, in particular 2-5, and in particular exactly 2 channels.

[0182] The first suction layer 5 has a first area 22 which borders the channel 16 and contains the entire amount of SAP 20 of the first suction layer 5.

[0183] The Figure 3b schematically shows, not to scale, a cross-section along the transverse central axis of another preferred incontinence article 1h.

[0184] The incontinence product 1h indicates the following with reference to Figure 3a described features. In addition, the absorbent storage body 23 of the incontinence article 1h in this preferred embodiment has, besides the first absorbent layer 5, a second absorbent layer 6. The features of the second absorbent layer 6 are described with reference to Figure 2b described in more detail. In this preferred embodiment, the channel 16 is formed as a recess 16b extending through the first suction body layer 5 in the thickness direction 21. The channel 16 can be configured as described in the following description. Figure 3a The channel 16 is described in more detail as a recess 16a extending in the thickness direction 21 in the first suction layer 5. Alternatively, the channel 16 can also be formed by embossing or compressing the first suction layer 5.

[0185] In this preferred example, the channel 16,16b of the first absorbent layer 5 is essentially free of absorbing materials, namely SAP 20 and fiber material 19.

[0186] In the Figure 1a , b , 2a-d and 3a,b In the illustrated embodiments, the pH regulator 7 comprises particulate monosodium citrate, type "Fine Granular F3500" from Jungbunzlauer. This monosodium citrate has a particle size of 80 to 355 µm at a rate of 59% by weight and a purity of at least 99%.

[0187] In the Figure 1a , b , 2a-d and 3a,b In the illustrated embodiments, SAP 20 is particle-shaped. In a conceivable variant, SAP can be fibrous, sheet-shaped, or foam-shaped.

[0188] The transfer component 15 only partially covers the first absorbent layer 5 of the absorption body 4 and, in this case, has a smaller extent than the first absorbent layer 5. ( Figures 2a -d and 3a,b ) and, if necessary, the second suction layer 6 ( Figures 2b ,d and 3b ) on. Alternatively, the transfer component 15 can completely cover the first suction layer 5 and / or the second suction layer 6.

[0189] The first suction body layer 5 is in the preferred examples shown ( Figures 2b ,d and 3bThe first layer 5 and the second layer 6 of the storage suction body 23 extend substantially the same in the transverse direction 10. However, the first layer 5 and the second layer 6 can also have different extensions in the transverse direction 10. In the described preferred embodiments, the first region 22 of the first layer 5 and the second layer 6 are depicted as uniformly thick layers, i.e., with a uniform extent in the thickness direction 21. Nevertheless, the first region 22 of the first layer 5 and / or the second layer 6 can have a thickness profile.

[0190] The in Figures 2a -d, 3a and 3bThe embodiments shown are to be understood as having one or more further typical features of incontinence articles, in particular that they may be designed as different types of incontinence articles such as incontinence pads, incontinence inserts, panty liners, open or closed type diapers or bed pads. Test method: pH value measurement on the surface of an incontinence product:

[0191] To perform a pH measurement on the surface of an incontinence product, particularly on the outer surface of the product's topsheet, a urine replacement solution is used. This urine replacement solution is a 0.9% w / v solution of sodium chloride (NaCl) in distilled water, prepared according to ISO 11984-1 (1996) and adjusted to pH 6.8 with sodium hydroxide (NaOH). Such a solution has long been known in the field, and its preparation is a routine procedure.

[0192] The incontinence product to be tested is laid flat with the topsheet side facing upwards, unfolded completely if necessary, and fixed to a support if required. The test is performed according to ISO 11984-1 (1996) at a temperature of 23 °C ± 2 °C and a relative humidity of 50% ± 5%. The incontinence product to be tested and the urine replacement fluid are preconditioned according to ISO 11984-1 (1996).

[0193] To realistically simulate a usage situation and to monitor the pH development or the buffering effect of the pH regulator over a longer period of use with multiple urination events, three urination events are simulated over a five-hour period as described below. The incontinence product is loaded with a total volume of liquid corresponding to approximately 90% of its maximum absorption capacity.

[0194] The volumes of the first, second, and third simulated voidings should therefore be chosen so that the total volume of these two simulated voidings corresponds to approximately 90% of the maximum absorption capacity of the incontinence product. The volume of the first simulated voiding corresponds to 45% to 50% of the maximum absorption capacity of the incontinence product. The volume of each simulated voiding is essentially the same and corresponds to 20% to 22.5% of the maximum absorption capacity.

[0195] If the maximum absorption capacity of an incontinence product is not known, the maximum absorption capacity is determined in advance in accordance with ISO 11984-1 (1996) using a second comparable incontinence product, for example, an incontinence product of the same absorbency, size and type and, if necessary, taken from the same package as the incontinence product to be tested.

[0196] A volume of urine replacement solution corresponding to 50% of the maximum absorption capacity of the incontinence product is poured onto the dry incontinence product within 30 seconds to simulate an initial voiding event. The solution is poured in such a way that it lands in an area where, during normal use, urine would land on the product. If this area is not clearly defined, the urine replacement solution should land in the center of the absorbent core, specifically along one of its transverse central axes. If the incontinence product has a transfer component, the urine replacement solution should be poured in the center of the area defined by the transfer component.Two hours after the start of the first simulated micturition with the first volume of urine replacement solution, a second volume of urine replacement solution, which corresponds to 20% of the maximum absorption capacity of the incontinence product, is poured onto the incontinence product as described above to simulate a second micturition.

[0197] Five hours after the start of loading with the first volume of urine replacement solution, a third volume of urine replacement solution, which corresponds to 20% of the maximum absorption capacity of the incontinence product, is poured onto the incontinence product as described above to simulate a third micturition.

[0198] After each of the three simulated voiding events, the pH value is measured on the outer surface of the topsheet of the incontinence product 1, 3, 5, 10, 15, and 20 minutes after the end of the respective simulated voiding. For this purpose, the pH value is measured at four points spaced lengthwise and / or crosswise across the flat, spread-out incontinence product, and an average of the four measured values ​​is calculated. If a transfer component is present, the measurements should be taken within the area defined by the transfer component. In any case, the measurement points must be located within an area containing a pH regulator.

[0199] The measuring points should be spaced apart and, in particular, should not overlap. It is essential to ensure that the measuring points on the incontinence product are not too dry in order to obtain reliable results. Ideally, the positions of the four measuring points should be maintained for all measurements; however, it is also possible to vary the position of one or more measuring points, for example, if a measuring point is too dry at the time of a later measurement. This can occur, for instance, with incontinence products that have particularly low rewetting, especially 15 and / or 20 minutes after the respective simulated voiding. If at least two suitable measuring points are not available for a measurement, the measurement will only be evaluated at 1, 3, 5, 10, and, if necessary, 15 minutes after the end of the respective simulated voiding.If only two or three measuring points are available for a measurement, an average value of the two or three measured values ​​must be calculated.

[0200] Due to the routine nature of such pH measurements in the field, it is easy for a specialist to assess whether a potential measuring point is too dry.

[0201] The measurement can generally be performed with any measuring device that, in the expert's opinion, is suitable for surface pH measurement. For example, the electrodes of the HI14142 or HI1413 models from HANNA Instruments are suitable. The measuring device is calibrated according to the manufacturer's instructions before the measurement begins.

Claims

1. Incontinence article for absorption of bodily excretions, comprising an at least regionally liquid-permeable topsheet (2), a substantially liquid-impermeable backsheet (3), and an absorption body (4) arranged between the topsheet (2) and the backsheet (3), wherein the absorption body (4) comprises a storage absorbent (23) and a transfer component (15), wherein the transfer component (15) is arranged between the storage absorbent (23) and the topsheet (2), and wherein the transfer component (15) comprises at least an upper transfer ply (15a) and a lower transfer ply (15b), and wherein a pH regulator (7) is introduced between the upper transfer ply (15a) and the lower transfer ply (15b).

2. Incontinence article according to Claim 1, characterized in that the upper transfer ply (15a) differs from the lower transfer ply (15b) with respect to at least one property selected from the group consisting of basis weight, density, tear strength, opacity, rewetting, liquid passage time (strike through time), extent in longitudinal or transverse or thickness direction, material type, fiber type, fiber length, fiber diameter, fiber crimp, hydrophobicity, and type or amount of additives.

3. Incontinence article according to Claim 1 or 2, characterized in that the upper transfer ply (15a) and the lower transfer ply (15b) are connected to one another by a folded edge (24) running in particular in a longitudinal direction (11).

4. Incontinence article according to one or more of the preceding claims, characterized in that the pH regulator (7) is introduced between the upper transfer ply (15a) and the lower transfer ply (15b) with a uniform distribution.

5. Incontinence article according to one or more of the preceding claims, characterized in that the storage absorbent (23) comprises a first absorbent ply (5), wherein the first absorbent ply (5) comprises superabsorbent polymer (SAP) (20).

6. Incontinence article according to Claim 5, characterized in that the SAP (20) is introduced in the first absorbent ply (5) with a uniform distribution, in particular in such a way that the concentration of the SAP (20) in percent by weight is the same in a middle longitudinal section (32a) of the first absorbent ply (5) as in a front longitudinal section (31a) and / or a rear longitudinal section (33a) of the first absorbent ply (5).

7. Incontinence article according to one or more of the preceding claims, characterized in that the amount per unit area of the pH regulator (7) is, in g / m2, greater in a middle longitudinal section (32b) of the absorption body (4) than in a front longitudinal section (31b) and / or a rear longitudinal section (33b) of the absorption body (4).

8. Incontinence article according to one or more of the preceding claims, characterized in that the first absorbent ply (5) comprises a channel (16) oriented in the longitudinal direction (11).

9. Incontinence article according to Claim 8, characterized in that the transfer component (15) covers the channel (16) at least regionally, in particular completely.

10. Incontinence article according to one or more of Claims 5 to 9, characterized in that the first absorbent ply (5) has a first region (22), and wherein the first absorbent ply (5) comprises SAP (20) in the first region (22), wherein, in particular, the first region (22) adjoins the channel (16), and further in particular in that the first region (22) completely surrounds the channel (16).

11. Incontinence article according to one or more of Claims 5 to 10, characterized in that the storage absorbent (23) comprises a second absorbent ply (6), wherein the second absorbent ply (6) is arranged below the first absorbent ply (5), i.e., between the first absorbent ply (5) and the backsheet (3).

12. Incontinence article according to Claim 11, characterized in that the second absorbent ply (6) comprises less than 20 percent by weight, in particular less than 15 percent by weight, further in particular less than 10 percent by weight, further in particular less than 5 percent by weight of SAP (20), and in particular is free of SAP (20).

13. Incontinence article according to one or more of Claims 8 to 12, characterized in that the channel (16) comprises or is formed from a cutout which extends through the first absorbent ply (5) in the thickness direction (21).

14. Incontinence article according to one or more of Claims 8 to 13, characterized in that the channel (16) is arranged on a longitudinal central axis (35) of the incontinence article.

15. Incontinence article according to one or more of the preceding claims, characterized in that the pH regulator (7) is particulate, wherein, in particular, at least 50 percent by weight of the pH regulator (7) has a particle size of 10 to 2000 µm, further in particular of 50 to 1200 µm, further in particular of 80 to 800 µm.

16. Incontinence article according to one or more of the preceding claims, characterized in that the amount per unit area of pH regulator (7) in the transfer component (15) is 5 to 100 g / m2, in particular 7 to 90 g / m2, further in particular 10 to 80 g / m2.

17. Incontinence article according to one or more of the preceding claims, characterized in that the pH regulator (7) comprises trisodium citrate, monosodium citrate or disodium citrate, in particular in that the pH regulator (7) consists of monosodium citrate or disodium citrate.

18. Incontinence article according to one or more of Claims 8 to 17, characterized in that the channel (16) of the first absorbent ply (5) is substantially free of SAP (20).

19. Incontinence article according to one or more of Claims 11 to 18, characterized in that the first absorbent ply (5) and / or the second absorbent ply (6) comprises less than 20 percent by weight, in particular less than 15 percent by weight, further in particular less than 10 percent by weight, further in particular less than 5 percent by weight of the pH regulator (7), and in particular is free of pH regulator (7).

20. Incontinence article according to one or more of the preceding claims, characterized in that the pH regulator (7) is immobilized at least partially and at least on a transfer ply of the upper transfer ply (15a) or lower transfer ply (15b), in particular immobilized by means of an adhesive.