Incontinence article with transfer component

Abstract

The invention relates to an incontinence article for absorbing body excretions, comprising a top sheet which is permeable to liquids at least in some regions, a back sheet which is substantially impermeable to liquids, and an absorption element which is arranged between the top sheet and the back sheet, wherein the absorption element has a storing suction element and a transfer component, and the transfer component is arranged between the storage suction element and the top sheet. The transfer component comprises at least one upper transfer layer and a lower transfer layer, and a pH regulator is introduced between the upper transfer layer and the lower transfer layer.

Description

[0001] Title: Incontinence products with transfer component

[0002] Description

[0003] The present invention relates to an incontinence article for absorbing body excretions with a transfer component and pH regulating agent for preferred use by adults.

[0004] A common problem with the use of incontinence products is the occurrence of skin irritation or inflammation caused by skin contact with bodily secretions such as urine. Incontinence-associated dermatitis (IAD) can often develop, a skin inflammation in the perineal or perigenital region caused by contact with an irritant such as urine. Changes in the pH of the skin upon contact with the more alkaline urine play a key role. To reduce such skin contact with urine, incontinence products typically contain superabsorbent materials that can absorb and permanently bind large amounts of urine.In addition, with an appropriate design of the incontinence product, for example through the use of fluid absorption and distribution layers inside the incontinence product, fluids can be absorbed more quickly into the incontinence product and directed away from the user's skin. Some incontinence products also have openings, grooves, or depressions designed to improve fluid conduction and distribution within the incontinence product. Furthermore, substances are often incorporated into the absorbent material of the absorbent body to regulate the pH value of the absorbed body fluids. Typically, the absorbent material is evenly premixed with such substances before the absorbent body is formed from the resulting mixture. This requires a high material input for the pH-regulating substances to enable even introduction and pH-regulating effect.At the same time, a significant portion of the pH-regulating substances remains unused during use, as incontinence products are typically replaced well before the absorbent body reaches its maximum possible fluid absorption capacity. The effectiveness of such pH-regulating substances on a skin contact surface of the incontinence product often cannot be satisfactorily ensured, especially when additional fluid absorption and distribution layers are used. Therefore, there is still a need for improved incontinence products.

[0005] Incontinence products for adults have long been known and often feature a topsheet that is at least partially permeable to liquids, a backsheet that is essentially impermeable to liquids, and an absorbent body arranged between the topsheet and the backsheet. These can be designed in a variety of ways, for example, as incontinence products that fit directly against the body or as absorbent incontinence pads.

[0006] The prior art includes approaches to providing incontinence articles with a pH control agent. WO2012121932A1 teaches an absorbent article with a buffer composition premixed with absorbent material or disposed between two absorbent layers of the absorbent body.

[0007] The inventors have recognized that such an arrangement has the disadvantage that the body fluid that comes into contact with the buffer composition upon penetrating the absorbent body can carry it along as it penetrates deeper layers of the absorbent body, or may only come into contact with a sufficient amount of the buffer composition in deeper layers of the absorbent body. Furthermore, the effect of the buffer composition can be impaired by certain components of the absorbent material, such as superabsorbent polymers or chemically pretreated cellulose fibers.

[0008] The present invention is therefore based on the object of overcoming these disadvantages.

[0009] This object is achieved by an incontinence article for the absorption of body excretions, comprising a top sheet which is at least partially liquid-permeable, a substantially liquid-impermeable back sheet and an absorbent body arranged between the top sheet and the back sheet, wherein the absorbent body has a storage absorbent body and a transfer component, wherein the transfer component is arranged between the storage absorbent body and the top sheet, and wherein the transfer component has at least an upper transfer layer and a lower transfer layer, and wherein a pH regulating agent is introduced between the upper transfer layer and the lower transfer layer.

[0010] Such an arrangement of the pH regulator advantageously focuses the pH regulator near the topsheet, thus enabling effective pH regulation close to the skin-facing surface of the incontinence product. This allows any body fluid that contacts the incontinence product to come into contact with the pH regulator before being transferred to the storage absorbent and permanently bound, thus accelerating the effect of the pH regulator. Furthermore, the risk of components of the storage absorbent impairing pH regulation is reduced.

[0011] 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.

[0012] For this purpose, the upper and lower transfer layers are preferably made of a fiber material, in particular a nonwoven material, and more preferably have a density of 0.01 to 0.10 g / cm 3 , especially from 0.02 to 0.08 g / cm 3 , further in particular from 0.03 to 0.07 g / cm 3 on.

[0013] Preferably, the upper and lower transfer layers are free of superabsorbent polymer (SAP).

[0014] Furthermore, the transfer component is preferably designed independently of SAP.

[0015] The fibers can be of natural or synthetic origin and can be of defined length (staple fibers) or continuous ("endless") or formed in situ. The fibers can be formed from a single polymer or polymer blend (monocomponent fiber) or from more than one single polymer and / or polymer blend (multicomponent fiber).

[0016] A multicomponent fiber has a cross-section comprising more than a single section, each of which comprises a different polymer or polymer blend. The term multicomponent fiber includes, but is not limited to, a bicomponent fiber. The various components of multicomponent fibers are arranged in substantially distinct regions across the cross-section of the fiber and extend continuously along the length of the fiber. A multicomponent fiber may have an overall cross-section comprising subsections of the two or more different components of any shape or arrangement, including, for example, coaxial subsections, core and sheath subsections, juxtaposed subsections, radial subsections, island-shaped subsections, etc.A bicomponent fiber having a "core / sheath structure" has a cross-section comprising: two discrete sections, each consisting of a polymer or polymer blend, wherein the sheath polymer or sheath polymer blend component is disposed around the core polymer or core polymer blend component.

[0017] In a preferred embodiment, the transfer component comprises multicomponent fibers, in particular bicomponent fibers, more particularly bicomponent fibers containing polyester, so-called Bico / PES fibers. The multicomponent fibers, in particular the bicomponent fibers, preferably have a circular or trilobal cross-section.

[0018] Preferred combinations of components in bicomponent 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.

[0019] The transfer component may also comprise or consist of other materials such as perforated films or foams or the like.

[0020] The upper and lower transfer layers may comprise or consist of the same materials or may comprise or consist of different materials.

[0021] The backsheet can, in particular, comprise or be formed by a breathable, yet substantially liquid-tight film material. The topsheet is preferably formed, at least in some areas, from a nonwoven-based material that is at least partially liquid-permeable.

[0022] 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 of basis weight, density, tear strength, opacity, rewetting, strike through time, extension in the longitudinal or transverse or thickness direction, type of material, fiber type, fiber length, fiber diameter, fiber crimp, hydrophobicity, type or amount of additives.

[0023] Additives may be, for example, finishing agents, conditioning agents, wetting agents, coagulants, anticoagulants, adhesive or surface-active substances or antimicrobial substances, colorants or fragrances, pH indicators or skin care substances.

[0024] The density of the upper and lower transfer layer is calculated as follows, as known to those skilled in the art: Density [g / cm 3 ] = Basis weight [g / cm 2 ] / Thickness [cm]

[0025] The basis weight is determined in a manner familiar to those skilled in the art by determining the mass of a test specimen, typically punched out of a sheet material, such as a nonwoven material, and dividing it by its area. To determine the extension 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.

[0026] In a preferred embodiment, the upper transfer layer and the lower transfer layer are connected to one another by a folded edge, in particular running in a longitudinal direction.

[0027] In such a case, the upper and lower transfer layers are preferably formed in one piece.

[0028] Alternatively, the upper and lower transfer layers can be connected to each other by a joint, particularly one extending in a longitudinal direction. The joining of the upper and lower transfer layers can be carried out using any joining method known per se to a person skilled in the art and suitable for the purpose and depending on the material of the upper and lower transfer layers, for example, thermal welding, sewing, sealing, gluing, or ultrasonic welding.

[0029] In the context of this invention, the longitudinal direction is understood to mean a longitudinal direction of the incontinence article, which, when the incontinence article is spread out flat, extends from a front transverse edge of the incontinence article, i.e., the transverse edge of the incontinence article lying on the abdomen in use, to a rear transverse edge of the incontinence article, i.e., the transverse edge of the incontinence article lying on the back in use. The longitudinal direction of the incontinence article corresponds to a longitudinal direction of the transfer component and the upper and lower transfer layers, the absorbent body, and the storage absorbent body. Likewise, the longitudinal direction of the incontinence article may correspond to a longitudinal direction of a first and / or second absorbent body layer, which will be described in more detail below.

[0030] A transverse direction is also understood to mean a transverse direction of the incontinence article that runs orthogonal to the longitudinal direction. The transverse direction of the incontinence article corresponds to a transverse direction of the transfer component and the upper and lower transfer layers, and of the absorbent body and the storage absorbent body. Likewise, the transverse direction of the incontinence article may correspond to a transverse direction of a first and / or second absorbent body layer, which is described in more detail below.

[0031] Furthermore, the incontinence article has a thickness direction that runs orthogonal to the longitudinal and transverse directions of the incontinence article. The thickness direction of the incontinence article corresponds to a thickness direction of the transfer component and the upper and lower transfer layers, and of the absorbent body and the storage absorbent body. Likewise, the thickness direction of the incontinence article may optionally correspond to a thickness direction of a first and / or second absorbent body layer, which is described in more detail below.

[0032] In a preferred embodiment, the pH regulating agent is introduced in a uniformly distributed manner between the upper and lower transfer layers.

[0033] In order to understand the term “uniform”, reference must be made to the distribution of the pH regulating agent in a plane enclosing 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.

[0034] Such a distribution reduces the risk of uneven pH regulation.

[0035] In addition, such an arrangement between the upper and lower transfer layers reduces the risk of unwanted or premature migration of the pH regulating agent within the incontinence article, particularly into the storage absorbent body.

[0036] The storage absorbent body of the incontinence article is suitable and intended to absorb body excretions, in particular body fluids, in particular urine, and to store them permanently in the storage absorbent body.

[0037] For this purpose, the storage absorbent body preferably has a first absorbent body layer, wherein the first absorbent body layer further preferably has SAP.

[0038] In an advantageous embodiment, the SAP is introduced into the first absorbent layer in a uniformly distributed manner, in particular such that the concentration of the SAP in weight percent in a central longitudinal section of the first absorbent layer is the same as in a front and / or rear longitudinal section of the first absorbent layer. This results in advantages during production, since, for example, the SAP can be uniformly premixed with the other material of the first absorbent layer, eliminating the need for more difficult separate dosing and / or arrangement of the SAP at high machine speeds.

[0039] Alternatively, the SAP may also be introduced in a non-uniformly distributed manner in the first absorbent layer such that the concentration of the SAP in percent by weight is higher or lower in the middle longitudinal section of the first absorbent layer than in the front and / or rear longitudinal section of the first absorbent layer.

[0040] This makes it possible to calculate the area-related amount of SAP in g / m 2 to adapt to the liquid storage capacity required in the respective middle or front or rear longitudinal section of the first absorbent layer.

[0041] In a preferred embodiment, the first absorbent layer contains 5-100 weight percent superabsorbent polymer (SAP), preferably 10-95 weight percent, more preferably 15-90 weight percent, and most preferably 20-80 weight percent. Typically, the SAP material can absorb at least 15 times, in particular 20 times, its weight in 0.9 weight percent saline solution (measured according to NWSP 242.0. R2(15)).

[0042] The SAP can, for example, be particle-shaped, fibrous, sheet-shaped, or foam-shaped.

[0043] The SAP may further comprise or consist of a substantially single-variety polymer material or a blend of two or more polymer materials. The first absorbent layer may contain additional materials, such as cellulose fibers ("fluff") or plastic fibers.

[0044] In such a case, the SAP is preferably substantially homogeneously mixed with the other materials, in particular fiber materials, 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.

[0045] It is also conceivable to form the first and / or the second absorbent layer (described in more detail below) of the storage absorbent by arranging one or more layers of different materials (material layers), in particular nonwoven material. In this case, the SAP can be arranged uniformly distributed in the longitudinal and / or transverse directions on a surface of at least one of the first and the second absorbent layer (described in more detail below) or a material layer, or between the first and second absorbent layers, or between two material layers.

[0046] A central longitudinal section of the first absorbent layer is arranged to overlap a point or area where urine impinges during use (micturition area) and extends across a transverse central axis of the first absorbent layer. The front longitudinal section of the first absorbent layer directly adjoins the central longitudinal section in the direction of a front transverse edge of the first absorbent layer, i.e., the transverse edge that lies on the abdomen during use, and extends to the front transverse edge of the first absorbent layer.

[0047] The rear longitudinal section of the first absorbent layer directly adjoins the central longitudinal section in the longitudinal direction in the direction of a rear transverse edge of the first absorbent layer and extends to the rear transverse edge of the first absorbent layer. The boundaries between the central and front longitudinal sections and between the central and rear longitudinal sections each run straight in the transverse direction of the first absorbent layer and orthogonal to a longitudinal center axis of the first absorbent layer.

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

[0049] Within the scope of the present invention, the longitudinal extent of the central longitudinal section of the first absorbent layer amounts to 40% of the total longitudinal extent of the first absorbent layer. The rear longitudinal section and the front longitudinal section of the first absorbent layer each amount to 30% of the total longitudinal extent of the first absorbent layer.

[0050] The middle, rear and front longitudinal sections of the first absorbent layer extend in the transverse direction of the first absorbent layer over an entire width of the first absorbent layer at the respective location, thus from a first longitudinal edge of the first absorbent layer to a second longitudinal edge of the first absorbent layer.

[0051] The term “longitudinal extension” means the maximum longitudinal extension of an element or longitudinal section or area.

[0052] The transverse extension is understood to mean the maximum transverse extension of an element or longitudinal section or region. The first absorbent layer can be rectangular, triangular, oval, T-shaped, hourglass-shaped, anatomical, asymmetrical, or in any other shape deemed suitable by a person skilled in the art.

[0053] In a preferred embodiment, the area-related amount of the pH regulating agent in a central longitudinal section of the absorption body in g / m 2 is larger than in a front and / or rear longitudinal section of the absorption body.

[0054] The central longitudinal section of the absorbent body is arranged in a crotch area of ​​the incontinence article, thus overlapping the point or area where urine impinges during use (micturition area), and extends across a transverse central axis of the absorbent body. The front longitudinal section of the absorbent body directly adjoins the central longitudinal section in the direction of a front transverse edge of the absorbent body, i.e., the transverse edge that lies on the abdomen during use, and extends to the front transverse edge of the absorbent body.

[0055] The rear longitudinal section of the absorbent body directly adjoins the central longitudinal section in the direction of a rear transverse edge of the absorbent body, i.e., the transverse edge that lies on the back when in use, and extends to the rear transverse edge of the absorbent body. The boundaries between the central and front longitudinal sections and between the central and rear longitudinal sections each run straight in the transverse direction of the incontinence article and orthogonal to a longitudinal central axis of the absorbent body.

[0056] The central longitudinal section of the absorption body is arranged symmetrically to the transverse central axis of the absorption body with regard to its longitudinal extent.

[0057] Within the scope of the present invention, the longitudinal extent of the central longitudinal section of the absorbent body amounts to 40% of the total longitudinal extent of the absorbent body. The rear longitudinal section and the front longitudinal section of the absorbent body each amount to 30% of the total longitudinal extent of the absorbent body.

[0058] The middle, rear, and front longitudinal sections of the absorbent body extend in the transverse direction of the absorbent body across the entire width of the absorbent body, i.e., from a first longitudinal edge of the absorbent body to a second longitudinal edge of the absorbent body. The term "longitudinal extension" refers to the maximum longitudinal extension of an element, longitudinal section, or region.

[0059] The transverse extension is understood to mean a maximum transverse extension of an element or longitudinal section or area.

[0060] The absorbent body may be rectangular, triangular, oval, T-shaped, hourglass-shaped, anatomical, asymmetrical or in any other shape deemed suitable by a person skilled in the art.

[0061] It should be noted that the absorbent body and / or the first absorbent body layer can have a uniform thickness and / or a uniform density. It is also conceivable that the absorbent body and / or the first absorbent body layer have a thickness or height profile or a density profile.

[0062] In a preferred embodiment, 5.00-30.00 g / m 2 , especially 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 regulator arranged in the middle longitudinal section of the absorption body.

[0063] Further preferably, the front and / or rear longitudinal section of the absorbent body is substantially free of pH regulating agent.

[0064] However, it is also conceivable that the front and / or rear longitudinal sections of the absorbent body contain pH regulating agents. In this case, 0.00-10.00 g / m 2 , especially 0.10-9.00 g / m 2 , further in particular 0.20-7.00 g / m 2 , further in particular 0.30-5.00 g / m 2 pH regulators may be arranged.

[0065] In a preferred embodiment, the first absorbent body layer has a channel oriented in the longitudinal direction.

[0066] The channel facilitates the rapid absorption of body fluids such as urine and serves to subsequently transport them to more distant regions of the absorbent body.

[0067] Preferably, the transfer component covers the channel at least in part, in particular completely.

[0068] With this arrangement, body fluids such as urine can be rapidly absorbed, distributed, and passed into the channel. Furthermore, absorbed body fluids can advantageously come into contact with the pH regulating agent as they pass through the transfer component, allowing the pH value to be quickly regulated. The channel supports early and consistent pH regulation through the pH regulating agent incorporated into the transfer component, before the body fluids are bound in the absorbent body, particularly by the SAP.

[0069] Preferably, the channel is arranged parallel to a longitudinal central axis of the absorbent body and / or the first absorbent body layer and / or the incontinence article.

[0070] In particular, the channel is arranged on a longitudinal central axis of the incontinence article and / or the absorbent body and / or the first absorbent body layer.

[0071] Furthermore, in particular, the channel is formed symmetrically to the longitudinal center axis of the incontinence article and / or the absorbent body and / or the first absorbent body layer.

[0072] The channel is advantageously arranged centered in the transverse direction of the absorption body and / or the first absorbent body layer.

[0073] Advantageously, the channel is arranged in the longitudinal direction of the incontinence article in the area where urine hits during use.

[0074] Furthermore, the channel advantageously extends beyond the transverse center axis of the absorption body.

[0075] A preferred channel is arranged such that it is further away from the rear transverse edge of the absorbent body than from the front transverse edge of the absorbent body. However, the channel can also be arranged equidistant from the front and rear transverse edges of the absorbent body, or further away from the front than from the rear transverse edge of the absorbent body.

[0076] In a preferred embodiment, the channel extends linearly in the longitudinal direction of the incontinence article and / or the absorbent body and / or the first absorbent layer. This allows the fluid to spread more freely in the channel in the longitudinal direction of the incontinence article.

[0077] However, wavy, jagged, curved or any other channel shape that the expert considers appropriate is also conceivable.

[0078] Different channel shapes such as rectangular, almond-shaped, bone-shaped, T-shaped, triangular, oval, star-shaped or branched are well known in the art.

[0079] The inventors have discovered that for rapid fluid conduction in the longitudinal direction, it is precisely those channels whose extension in the longitudinal direction of the incontinence article is greater than their extension in the transverse direction that are advantageous. Rectangular, almond-shaped, or oval channels have proven particularly advantageous. In a preferred embodiment, the channel comprises or is formed from a recess extending through the first absorbent layer in the thickness direction.

[0080] The channel is preferably substantially free of absorbent materials.

[0081] For this purpose, the channel can be formed by omitting the absorbent material or by removing absorbent material by cutting or punching.

[0082] However, it is also conceivable that the channel is formed by embossing or compressing the first absorbent layer.

[0083] In a preferred embodiment, the channel of the first absorbent layer is substantially free of SAP.

[0084] This offers the advantage that the body fluid absorbed into the channel is not prematurely bound permanently in the channel, but can be passed unhindered along the channel and thus distributed more evenly throughout the absorbent body. In particular, premature binding of the absorbed body fluid by SAP in the channel can hinder or at least delay the pH regulation of the body fluid.

[0085] According to a preferred embodiment, the first absorbent layer has a single channel.

[0086] In an alternative embodiment, the first absorbent body layer has more than one channel, in particular 2-5, further in particular exactly 2 channels.

[0087] In a preferred embodiment, the first absorbent layer has a first region, wherein the first absorbent layer has SAP in the first region.

[0088] Further preferably, the first region adjoins the channel, in particular the first region completely surrounds the channel.

[0089] This allows the pH value of the body fluid absorbed into the canal, especially urine, to be regulated before permanent binding by SAP.

[0090] In a further preferred embodiment, the storage absorbent body has a second absorbent body layer, wherein the second absorbent body layer is arranged below the first absorbent body layer, i.e. between the first absorbent body layer and the backsheet.

[0091] More preferably, the second absorbent layer comprises less than 20 weight percent, 15 weight percent, 10 weight percent, or 5 weight percent SAP; in particular, the second absorbent layer is free of SAP. The second absorbent layer advantageously provides greater wearing comfort, particularly in the case of an incontinence article that fits close to the body, since a softer haptic impression of the incontinence article is achieved from the backsheet side. For this purpose, the second absorbent layer contains little or no SAP. It is also known to those skilled in the art that particulate material can exert abrasive forces that can damage the substantially liquid-impermeable backsheet, in particular a liquid-impermeable backsheet film, of the absorbent article and lead to leakage of the article.Therefore, the second absorbent layer also offers the advantage of reducing the risk of damage to the backsheet film during the manufacturing process or during use of the incontinence product.

[0092] It has proven advantageous if the pH regulator is in particle form.

[0093] Preferably, at least 50 percent by weight of the pH regulator has a particle size of 10 to 2000 pm, in particular of 50 to 1200 pm, more particularly of 80 to 800 pm.

[0094] In principle, pH regulators with smaller or larger particle sizes are also available and can be used.

[0095] However, the preferred particle sizes offer the advantage that particles of such a size dissolve more slowly when wetted with body excretions such as micturition 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 an upper side of the incontinence article facing the user's skin.

[0096] In addition, a pH regulator of the preferred particle size is easier to dose and incorporate into the incontinence article, especially into the transfer component, especially in high-speed machines, than, for example, fine-powdered pH regulators, since there is less dust development and associated material loss during the manufacturing process.

[0097] In addition, the process-safe arrangement of a specified amount of pH regulator in a specified target range is positively influenced.

[0098] 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, thereby improving the wearing comfort of the incontinence product, particularly when arranged near a skin-facing surface of the incontinence product. As an alternative to particulate pH regulators, the pH regulator can also be incorporated into the transfer component in dissolved form, particularly as an aqueous or alcoholic solution, in particular by spraying and optionally subsequently drying at least one of the upper or lower transfer layers. As a further alternative, the pH regulator can also be incorporated into the transfer component as a suspension or paste.

[0099] Body excretions such as urine typically have a more alkaline pH than the skin and can therefore lead to skin irritation or inflammation. Therefore, the prior art describes pH regulators for incontinence products for pH control of body 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, all substances or compositions are conceivable that have a suitable buffering effect and pose a low risk of skin irritation. In the context of the present invention, superabsorbent polymers (SAP), in particular polymers that absorb at least 15 times their weight in 0.9 weight percent saline solution (measured according to NWSP 242.0. R2(15)), are not to be understood as pH regulators.

[0100] 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 and disodium citrate and trisodium citrate.

[0101] By selecting or combining the above-mentioned 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 areas with a strong acid reaction, as is the case with the use of citric acid.

[0102] If the pH regulator comprises more than one citrate, the pH regulator preferably comprises a homogeneous mixture of the respective citrates. This has the advantage of avoiding local differences in the buffering effect of the pH regulator. The terms monosodium citrate, disodium citrate, and trisodium citrate encompass both the non-hydrated form and hydrates of the respective substance.

[0103] The pH regulator preferably consists of monosodium citrate or disodium citrate.

[0104] One advantage of using monosodium citrate is that it is less hygroscopic than citric acid, for example, and therefore prevents unwanted moisture from entering the incontinence product before use. Because monosodium citrate is less hygroscopic than citric acid, for example, it also has the advantage of being more fluid, making it easier to dose and distribute.

[0105] In a preferred embodiment, the pH regulator consists of monosodium citrate.

[0106] In a further preferred embodiment, the pH regulator consists of disodium citrate.

[0107] Using only one component as a pH regulator offers process-related advantages, as no mixing of different components or maintenance of homogeneous mixing is required during the manufacturing process. Furthermore, a uniform buffering effect across the pH regulator-containing areas of the incontinence product is further supported.

[0108] In a preferred embodiment, the area-related amount of pH regulating agent in the transfer component is 5 to 100 g / m 2 , especially 7 to 90 g / m 2 , further in particular 10 to 80 g / m 2 .

[0109] The total amount of pH regulating agent per incontinence article, which is intended in particular 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.

[0110] The quantities of the pH regulator are to be understood as referring to an anhydrous pH regulator, for example, non-hydrated monosodium citrate. If the pH regulator comprises one or more hydrates or, as described below, more than 5%, in particular more than 10%, of additive substances, the total amount of the pH regulator is given in g / m 2 adjusted such that the total amount of pure and / or non-hydrogenated pH regulator contained corresponds to the above preferred amount.

[0111] Preferably, the monosodium citrate, disodium citrate, or trisodium citrate is used essentially in pure form, in particular with a purity of at least 90%, more particularly at least 95%, more particularly at least 98%, more particularly at least 99%, more particularly 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.

[0112] This means that skin irritations caused by residues of other substances can be largely avoided when using the incontinence product.

[0113] However, it is also conceivable for the pH regulator to contain a small amount of one or more additive substances, for example, finishing and / or conditioning agents such as release agents, stabilizers, dust binders, anticoagulants, wetting agents, coagulants, anticoagulants, adhesive or surface-active substances or antimicrobial substances, dyes or fragrances, or pH indicators. In such a case, the proportion of the one or more 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%, more preferably less than 1%.

[0114] The transfer component can cover the first absorbent body layer and / or the absorbent body in the transverse direction essentially completely or only partially.

[0115] Preferably, the transfer component overlaps the absorption body and / or the first absorbent body layer in the longitudinal direction only in certain areas.

[0116] Thus, the transfer component essentially has a smaller areal extension, at least in some areas, than the first absorbent body layer and / or the absorption body in the longitudinal and / or transverse direction of the flat incontinence article.

[0117] The transfer component preferably overlaps the first absorbent body layer and / or the absorption body by 5-100%, in particular by 10-90%, further in particular by 15-80%, further in particular by 15-70% of its areal extent.

[0118] Preferably, the transfer component is arranged at least in one area where the micturition fluid impinges on the incontinence article during use. In particular, the transfer component extends over and in the area of ​​a transverse central axis of the absorbent body.

[0119] In a preferred embodiment, the incontinence article maintains a skin-friendly pH value over at least two, in particular at least three micturition events.

[0120] This improves comfort even over longer periods of use, such as during a night's sleep.

[0121] More preferably, the pH value on an upper side of the incontinence article facing the skin 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.

[0122] Preferably, the first and / or second absorbent layer contains less than 20 percent by weight, in particular less than 15 percent by weight, more particularly less than 10 percent by weight, more particularly less than 5 percent by weight of the pH regulator. Furthermore, the first and / or second absorbent layer is free of pH regulator.

[0123] This advantageously achieves greater wearing comfort, particularly for a body-hugging incontinence product, as a softer haptic impression of the incontinence product is achieved from the topsheet and / or backsheet sides. As described above, particulate material can exert abrasive forces that can damage the essentially liquid-impermeable backsheet, particularly a liquid-impermeable backsheet film of the absorbent article, and lead to leakage of the article. Therefore, a further advantage is that the risk of damage to the backsheet film during manufacturing or use of the incontinence product is reduced.

[0124] In addition, in the usage situation, the risk of an undesirable pH reduction independent of a micturition event on a surface of the incontinence device facing the skin or in contact with the skin of the user, for example when the user of the incontinence device sweats, can be reduced.

[0125] In a preferred embodiment, the pH regulating agent is at least partially immobilized, in particular immobilized by means of an adhesive, on at least one of the upper or lower transfer layers. During the manufacturing and packaging process, and in particular during application and wear of an incontinence article, multiple forces act on the incontinence article and / or the transfer component. For example, during packaging or during use, the transfer component may be compressed or crumpled. At least partial or complete immobilization can reduce the risk of migration of the pH regulating agent, for example, the formation of local accumulations.

[0126] The incontinence article can be of different designs such as incontinence pads, incontinence inserts, panty liners, open-type incontinence diapers, closed-type incontinence diapers or even medical underpads.

[0127] Depending on the type or embodiment, the incontinence article may have one or more other features well known in the prior art, such as side panels, closure systems, wings, elasticizations, leak 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 to the person skilled in the art or deemed appropriate.

[0128] Further features, details, and advantages of the invention will become apparent from the appended claims and from the drawings and the following description of preferred embodiments of the invention and examples. The drawing shows:

[0129] Figure 1a schematic representation in plan view of an incontinence article with transfer component and pH regulator

[0130] Figure 1b schematic representation in plan view of an incontinence article with transfer component and pH regulator as well as a channel

[0131] Figure 2a schematically shows a cross section through an incontinence article with a first absorbent layer, transfer component and pH regulating agent. Figure 2b schematically shows a cross section through an incontinence article with a first absorbent layer with SAP and a second absorbent layer, a transfer component and pH regulating agent.

[0132] Figure 2c schematically shows a cross-section through an incontinence article analogous to Figure 2a, but with a one-piece transfer component

[0133] Figure 2d schematically shows a cross-section through an incontinence article analogous to Figure 2b, but with a one-piece transfer component

[0134] Figure 3a schematically shows a cross section through an incontinence article with a first absorbent layer, transfer component, pH regulating agent and a channel

[0135] Figure 3b schematically shows a cross section through an incontinence article with a first absorbent layer with SAP and a second absorbent layer, a transfer component, pH regulating agent and a channel

[0136] Figure 1a shows schematically, not to scale, an incontinence article 1a according to the invention with a topsheet 2 which is at least partially liquid-permeable, 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 has a transverse central axis 36 and a longitudinal central axis 35.

[0137] The absorption body 4 has a storage absorbent body 23 and a transfer component 15, wherein the transfer component 15 is arranged between the storage absorbent body 23 and the topsheet 2, and wherein the transfer component 15 has at least one upper transfer layer 15a and one lower transfer layer 15b, described in more detail with reference to Figures 2a-d. A pH regulating agent 7, shown here as a dot, for example comprising or consisting of 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 regulating agent 7 is uniformly distributed between the upper transfer layer 15a and the lower transfer layer 15b, namely in a plane enclosing a longitudinal direction 11 and a transverse direction 10 of the upper transfer layer 15a and the lower transfer layer 15b. In this preferred example, the area-related amount of pH regulator is 723 g / m2 .

[0138] The storage absorbent body 23 has a first absorbent body layer 5, which comprises an SAP 20 and fiber material 19, described in more detail with reference to Figures 2a-d. The SAP 20 is uniformly distributed in the first absorbent body 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 body layer 5 is the same as in a front 31a and / or a rear longitudinal section 33a of the first absorbent body layer 5.

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

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

[0141] Optionally, the storage absorbent body 23 can additionally comprise a second absorbent body layer 6, described in more detail with reference to Figures 2b and 2d. In this case, the extension of the first absorbent body layer 5 in the longitudinal direction 11 and / or transverse direction 10 can differ from an extension of the second absorbent body layer 6 and / or from the total extension of the storage absorbent body 23 and / or from the total extension of the absorption body 4.

[0142] The absorbent body 4 has a front transverse edge 4a, which lies on the abdomen side in the use state, and a rear transverse edge 4b, which lies on the back side in the use state, each extending in a transverse direction 10 of the absorbent body 4, which here corresponds to a transverse direction of the incontinence article 1a and a transverse direction of the first absorbent body layer 5. The front 4a and the rear transverse edge 4b ​​of the absorbent body 4 are partially straight. 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 with another line configuration deemed suitable by a person skilled in the art.In this example, the transfer component 15 extends in the longitudinal direction 11 over the entire central longitudinal section of the first absorbent body layer 32a, i.e., has a longitudinal extent equal to the central longitudinal section of the first absorbent body layer 32a. It is also conceivable for the transfer component 15 to have a smaller or greater longitudinal extent than the central longitudinal section of the first absorbent body layer 32a and / or to be arranged offset in the longitudinal direction 11 in the direction of the front transverse edge 4a of the absorbent body 4 or the rear transverse edge 4b ​​of the absorbent body 4 relative to the central longitudinal section of the first absorbent body layer 32a.

[0143] In this example, the transfer component 15 and the pH regulating agent 7 are arranged on both sides of the longitudinal central axis 35 of the absorbent body 4, in a central region 12 of the absorbent body 4 in the transverse direction 10, wherein peripheral regions 13 of the absorbent body 4 in the transverse direction 10 are free of pH regulating agent 7. As a result, the pH regulating agent 7 is focused where body fluids typically primarily impinge on the incontinence article 1a, namely in the central region 12. The transfer component 15 and the pH regulating agent 7 are also arranged in a micturition region 9 (also referred to as micturition point), in which micturition fluid is highly likely to impinge on the incontinence article 1a during use. However, it is also possible to arrange the pH regulating agent 7 both in the central region 12 and in the peripheral regions 13.

[0144] The area-related amount of the pH regulating agent 7 is in the central longitudinal section 32b of the absorption body 4 in g / m 2 greater than in the front 31b and the rear longitudinal section 33b of the absorption body 4. In this example, the front 31b and the rear longitudinal section 33b of the absorption body 4 are free of pH regulating agent 7.

[0145] The central longitudinal section 32b of the absorbent body 4 is located in a crotch region 14 of the incontinence article 1a, thus extending over the micturition region 9, and also extends beyond the transverse central axis 36 of the absorbent body 4. The central longitudinal section 33b of the absorbent body 4 is arranged symmetrically to the transverse central axis 36 of the absorbent body 4.

[0146] The front longitudinal section 31b of the absorption body 4 adjoins the central longitudinal section 32b in the longitudinal direction 11 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.

[0147] 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 the central 32b and the front longitudinal section 31b and between the central 32b and the rear longitudinal section 33b each run straight in the transverse direction 10 of the incontinence article 1a and orthogonal to the longitudinal central axis 35 of the absorbent body 4.

[0148] 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 body 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 body layer 5.

[0149] Furthermore, the transverse center axis 36 of the absorbent body 4 corresponds to a transverse center axis of the incontinence article 1a and a transverse center axis of the first absorbent body 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 body layer 5.

[0150] In this preferred exemplary embodiment, the first absorbent body layer 5 is congruent, i.e. it extends the same distance as the absorbent body 4 in a longitudinal direction 11 of the absorbent body 4 and in a transverse direction 10 of the absorbent body 4. Therefore, the total longitudinal extent 34 of the absorbent body 4 corresponds to a total longitudinal extent of the first absorbent body layer 5, and a maximum transverse extent of the first absorbent body layer 5 corresponds to a maximum transverse extent of the absorbent body 4. Alternatively, the first absorbent body layer 5 and the absorbent body 4 can extend to different distances in the transverse direction 10 or longitudinal direction 11 of the absorbent body.

[0151] The absorbent body 4 and a chassis 8 formed jointly by the topsheet 2 and the backsheet 3 are anatomically shaped in this embodiment. However, they can also be rectangular, triangular, oval, T-shaped, hourglass-shaped, asymmetrical, or in any other shape deemed suitable by a person skilled in the art.

[0152] The incontinence article shown in Figure 1a may have additional optional features that are sufficiently described in the prior art, such as elasticizing means, fluid barriers (e.g., cuffs), or fastening means. Figure 1b shows an incontinence article 1b that has the features described with reference to Figure 1a and may have optional features described with reference to Figure 1a. In addition, the first absorbent layer 5 has a channel 16 oriented in the longitudinal direction 11.

[0153] In this example, the transfer component 15 covers 18% of the total surface area of ​​the absorbent body 4. It has been found that this surface area advantageously provides efficient liquid absorption and distribution while being cost-effective. However, a suitable transfer component 15 can cover between 5 and 100% of the total surface area of ​​the absorbent body 4.

[0154] In this exemplary embodiment, the transfer component 15 is arranged symmetrically to the transverse central axis 36 of the absorbent body 4. However, the transfer component 15 can also be arranged asymmetrically to the transverse central axis 36 of the absorbent body 4 or to a transverse central axis of the incontinence article 1b, thus being arranged closer to the front transverse edge 4a or the rear transverse edge 4b ​​of the absorbent body 4 than to the respective other rear 4b or front transverse edge 4a of the absorbent body 4.

[0155] Both the transfer component 15 and the channel 16 extend over the micturition area 9.

[0156] The channel 16 is arranged parallel to and on the longitudinal center axis 35 of the absorbent body 4 and the incontinence article 1b. Furthermore, the channel 16 is formed symmetrically to the longitudinal center axis 35 of the absorbent body 4 and the incontinence article 1b.

[0157] Advantageously, the channel 16 is arranged centered in the transverse direction 10 of the absorption body 4 and extends symmetrically across the transverse center axis 36 of the absorption body 4.

[0158] The example shows a preferred channel 16 which is 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 arranged equally far from the front 4a and rear transverse edge 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.

[0159] In this example, the channel 16 is rectangular and extends linearly in the longitudinal direction 11 of the absorbent body 4 and incontinence article 1b. However, a wave-shaped, serrated, or curved channel, or any other channel shape deemed appropriate by a person skilled in the art, 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 art.

[0160] The channel 16 in this example advantageously has a greater extension in the longitudinal direction 11 of the absorption body 4 than in the transverse direction 10.

[0161] The channel 16 is completely covered by the transfer component 15. A body fluid directed into the channel 16 during use can first encounter the pH regulating agent 7 arranged in the transfer component 15.

[0162] A single central channel 16, as shown here in Figure 1b, has a beneficial effect on the stability and shape of the incontinence article 1b in use. However, it is also conceivable to provide more than one channel, in particular two channels.

[0163] The first absorbent layer 5 has a first region 22 in which SAP 20 is arranged. The first region 22 of the first absorbent layer 5 borders the channel 16 and completely surrounds the channel 16.

[0164] Figure 2a shows, by way of example and not to scale, a schematic cross-section along the transverse central axis of an incontinence article 1c. The incontinence article 1c has the features described with reference to Figure 1a. In addition, in this preferred embodiment, the incontinence article 1c has a transfer component 15.

[0165] The incontinence article 1c comprises a liquid-permeable topsheet 2, a substantially (thus in use) liquid-impermeable backsheet 3, and an absorbent body 4 arranged therebetween. The absorbent body 4 of the incontinence article 1c comprises a storage absorbent body 23 and a transfer component 15. In this example, the storage absorbent body consists of the first absorbent body layer 5, which comprises fiber material 19, such as cellulose fibers or plastic fibers, and particulate SAP 20. The transfer component comprises an upper transfer layer 15a and a lower transfer layer 15b, and pH regulating agent 7, which is introduced between the upper 15a and the lower 15b transfer layers. In the case shown, the SAP 20 is arranged uniformly distributed between the upper 15a and the lower 15b transfer layers. The transfer component 15, i.e. the pH regulating agent 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 regulating agent 7 before they are permanently bound in the storage absorbent body 23, in particular by SAP 20, since this allows for rapid and more effective pH control.

[0166] In this case, the upper transfer layer 15a and the lower transfer layer 15b are formed from the same nonwoven material and have the same properties. The upper transfer layer 15a and the lower transfer layer 15b can also advantageously differ from one another with respect to at least one property selected from the group consisting of basis weight, density, tear strength, opacity, rewetting, strike-through time, length in the longitudinal or transverse direction or thickness direction, material type, fiber type, fiber length, fiber diameter, fiber crimp, hydrophobicity, and type or amount of additives.

[0167] The pH regulating agent 7 can advantageously be immobilized at least partially and at least on one of the upper 15a or lower transfer layer 15b, in particular immobilized by means of an adhesive (not shown in Figure 2a).

[0168] Furthermore, the incontinence article 1c may comprise one or more additional absorbent layers or transfer layers.

[0169] Figure 2b shows a schematic, not to scale, cross-section along the transverse central axis of another preferred incontinence article 1d. The incontinence article 1c has the features described with reference to Figure 2a and can additionally have the optional features described with reference to Figure 2a. In addition, in this preferred embodiment, the storage absorbent body 23 of the incontinence article 1c has a second absorbent body layer 6 in addition to the first absorbent body layer 5.

[0170] The second absorbent layer 6 is arranged beneath 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 any SAP. Furthermore, the second absorbent layer 6 also does not contain any pH regulator 7. This improves the wearing comfort of the incontinence article from the backsheet side and reduces the risk of damage to the backsheet by particles. Alternatively, small amounts of SAP and / or pH regulator can be provided in the second absorbent layer 6.

[0171] The second absorbent body layer 6 consists essentially of fiber material 19, such as cellulose fibers or plastic fibers.

[0172] Figure 2c shows a schematic, not to scale, cross-section along the transverse center axis of another preferred incontinence article 1e. The incontinence article 1e has features described with reference to Figure 2a. In addition, the upper 15a and the lower transfer layer 15b are connected to one another by a folded edge 24. The folded edge 24 runs in the longitudinal direction of the incontinence article 1e, 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 one another by a joint, in particular running in a longitudinal direction. The joining of the upper and lower transfer layers can be carried out using any joining method known to those 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.

[0173] Figure 2d shows a schematic, not to scale, cross-section along the transverse center axis of another preferred incontinence article 1f. The incontinence article 1f has the features described with reference to Figure 2b. In addition, the upper 15a and the lower transfer layer 15b are connected to one another by a folded edge 24. The folded edge 24 runs in the longitudinal direction of the incontinence article 1f (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 joined to one another by means of a joint as described with reference to Figure 2c.

[0174] Figure 3a schematically shows, not to scale, a cross-section along the transverse center axis of another preferred incontinence article 1g. The incontinence article 1g has the features described with reference to Figure 2a. In this preferred embodiment, the incontinence article 1g also has a channel 16. In this example, the channel 16, 16a does not extend completely through the first absorbent layer 5. The channel 16 can be formed, for example, by embossing or compressing the first absorbent layer 5.

[0175] The channel 16, 16a is essentially free of absorbent materials, namely SAP 20 and fiber material 19. The channel 16 can alternatively be formed, as described in more detail below with reference to Figure 3b, as a recess extending through the first absorbent body layer 5 in the thickness direction 21.

[0176] In this preferred embodiment, the first absorbent layer 5 has a single channel 16, which is arranged on a longitudinal center axis of the absorbent body 4 (not shown here). Furthermore, the channel 16 is formed symmetrically to the longitudinal center axis of the absorbent body 4. The channel 16 is advantageously arranged centered in the transverse direction 10 of the absorbent body 4.

[0177] Alternatively, the first absorbent layer can have more than one channel, in particular 2-5, and more particularly exactly 2 channels. The first absorbent layer 5 has a first region 22, which borders the channel 16 and contains the entire amount of SAP 20 of the first absorbent layer 5.

[0178] Figure 3b shows schematically, not to scale, a cross section along the transverse central axis of another preferred incontinence article 1h.

[0179] The incontinence article 1h has the features described with reference to Figure 3a. In addition, in this preferred embodiment, the storage absorbent body 23 of the incontinence article 1h has, in addition to the first absorbent body layer 5, a second absorbent body layer 6. The features of the second absorbent body layer 6 are described in more detail with reference to Figure 2b. In this preferred exemplary embodiment, the channel 16 is formed as a recess 16b extending through the first absorbent body layer 5 in the thickness direction 21. The channel 16 can also be formed as a recess 16a extending in the thickness direction 21 in the first absorbent body layer 5, as described in more detail with reference to Figure 3a. As an alternative embodiment, the channel 16 can also be formed by embossing or compressing the first absorbent body layer 5.

[0180] The channel 16,16b of the first absorbent body layer 5 is in this preferred example substantially free of absorbent materials, namely SAP 20 and fiber material 19.

[0181] In the embodiments shown in Figures 1a, b, 2a-d, and 3a, b, pH regulator 7 comprises particulate monosodium citrate, type "Fine Granular F3500" from Jungbunzlauer. This monosodium citrate has a particle size of 80 to 355 pm (59 wt.%) and a purity of at least 99%.

[0182] In the embodiments illustrated in Figures 1a, b, 2a-d, and 3a, b, the SAP 20 is in particle form. In a conceivable variant, the SAP can be in fiber form, sheet form, or foam form.

[0183] The transfer component 15 only partially overlaps the first absorbent layer 5 of the absorbent body 4 and, in this case, has a smaller extension than the first absorbent layer 5 (Figures 2a-d and 3a, b) and, if applicable, the second absorbent layer 6 (Figures 2b, d and 3b). Alternatively, the transfer component 15 can completely overlap the first absorbent layer 5 and / or the second absorbent layer 6.

[0184] In the preferred examples shown (Figures 2b, d and 3b), the first absorbent layer 5 has a substantially identical extension in the transverse direction 10 as the second absorbent layer 6 of the storage absorbent body 23. However, the first absorbent layer 5 and the second absorbent layer 6 can also have different extensions in the transverse direction 10. The first region 22 of the first absorbent layer 5 and the second absorbent layer 6 are shown in the described preferred embodiments as layers of uniform thickness, i.e., with a uniform extension in the thickness direction 21. Nevertheless, the first region 22 of the first absorbent layer 5 and / or the second absorbent layer 6 can have a thickness profile.

[0185] The embodiments shown in Figures 2a-d, 3a and 3b are to be understood as comprising one or more further typical features of incontinence articles, in particular as being designed as various types of incontinence articles such as incontinence pads, incontinence liners, panty liners, open or closed type diapers or medical underpads.

[0186] Test method pH measurement on the surface of an incontinence product:

[0187] A urine replacement solution is used to perform a pH measurement on the surface of an incontinence product, particularly on the outer surface of the topsheet of the incontinence product. The urine replacement solution is a 0.9% (w / v) solution of sodium chloride (NaCl) in distilled water, prepared according to ISO 11984-1 (1996), which is adjusted to pH 6.8 with sodium hydroxide (NaOH). Such a solution has long been known in the general art, and its preparation is one of the routine methods in the field.

[0188] The incontinence product to be tested is laid out flat with the topsheet facing up, fully unfolded if necessary, and secured to a support if necessary. The test is conducted 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 accordingly according to ISO 11984-1 (1996).

[0189] In order to simulate a usage situation as realistically as possible and to monitor the pH development or the buffering effect of the pH regulator over a longer period of use with multiple micturition events, three micturition events are simulated over a period of five hours, as described below. The incontinence product is loaded with a total fluid volume corresponding to approximately 90% of the incontinence product's maximum absorption capacity.

[0190] The volumes of the first, second, and third simulated micturitions should therefore be selected so that the total volume of the first, second, and third simulated micturitions corresponds to approximately 90% of the maximum absorption capacity of the incontinence product. The volume of a first simulated micturition corresponds to 45% to 50% of the maximum absorption capacity of the incontinence product. The respective volumes of a second and a third simulated micturitions are essentially the same, each corresponding to 20% to 22.5% of the maximum absorption capacity.

[0191] If the maximum absorption capacity of an incontinence product is not known, the maximum absorption capacity shall be 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 product type and, if applicable, taken from the same package as the incontinence product to be tested.

[0192] 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 a first urination. This is done in such a way that the urine replacement solution impinges on the incontinence product in an area where the urination fluid would also impinge on the incontinence product during a urination event in the in-use state. If this area cannot be determined with certainty, the urine replacement solution should impinge centrally on the absorbent body, particularly in the area of ​​a transverse central axis of the absorbent body. If the incontinence product has a transfer component, the urine replacement solution is poured onto the incontinence product, particularly centrally within an area formed 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 corresponding to 20% of the maximum absorption capacity of the incontinence device is poured onto the incontinence device as described above to simulate a second micturition.

[0193] Five hours after starting to load the first volume of urine replacement solution, a third volume of urine replacement solution, corresponding to 20% of the maximum absorption capacity of the incontinence device, is poured onto the incontinence device as described above to simulate a third voiding.

[0194] After each of the three simulated micturition events, the pH value on the outer upper side of the topsheet of the incontinence product is measured 1, 3, 5, 10, 15 and 20 minutes after the end of the respective simulated micturition. For this purpose, the pH value is measured at four measuring points each, which are spaced apart from each other in the longitudinal and / or transverse direction of the flatly laid 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 formed by the transfer component. In any case, the measuring points must be arranged within an area containing a pH regulator. The measuring points should be spaced apart from each other and, in particular, at least not overlap. It is essential to ensure that the measuring points on the incontinence product are not too dry in order to obtain reliable measurement results.Preferably, the positions of the four measuring points should be retained for all measurements, but 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 be the case, for example, with incontinence products with particularly low rewetting, particularly 15 and / or 20 minutes after the respective simulated urination. If at least two suitable measuring points are not available for a measurement, the measurement will only be evaluated at times 1, 3, 5, 10 and, if applicable, 15 minutes after the end of the respective simulated urination. If only two or three measuring points are available for a measurement, an average of the two or three measured values ​​must be calculated.

[0195] Due to the routine nature of such pH measurements in the field, it is easy for the person skilled in the art to assess whether a possible measuring point is too dry.

[0196] The measurement can generally be performed with any measuring device that, in the opinion of a professional, is suitable for surface pH measurement. For example, the HL 14142 or HL 1413 electrodes from Hanna Instruments are suitable. The measuring device is calibrated according to the manufacturer's instructions before starting the measurement.

Claims

Patent claims 1. Incontinence article for the absorption of bodily excretions, comprising a topsheet (2) that is at least partially permeable to liquid, a backsheet (3) that is substantially impermeable to liquid, and an absorbent body (4) arranged between the topsheet (2) and the backsheet (3), wherein the absorbent body (4) has a storage absorbent body (23) and a transfer component (15), wherein the transfer component (15) is arranged between the storage absorbent body (23) and the topsheet (2), and wherein the transfer component (15) has at least an upper transfer layer (15a) and a lower transfer layer (15b), and wherein a pH regulator (7) is incorporated between the upper transfer layer (15a) and the lower transfer layer (15b).

2. Incontinence article according to claim 1 characterized in that the upper transfer layer (15a) differs from the lower transfer layer (15b) with respect to at least one property selected from the group consisting of basis weight, density, tensile strength, opacity, rewetting, fluid 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.

3. Incontinence article according to claim 1 or 2 characterized in that the upper transfer layer (15a) and the lower transfer layer (15b) are connected to each other by a fold edge (24) extending in a longitudinal direction (11), in particular in a longitudinal direction (11).

4. Incontinence article according to one or more of the preceding claims characterized in that the pH regulating agent (7) is uniformly distributed between the upper (15a) and the lower transfer layer (15b).

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

6. Incontinence article according to claim 5 characterized in that 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 mean The longitudinal section (32a) of the first layer of the suction body (5) is the same size as in a front (31a) and / or a rear longitudinal section (33a) of the first layer of the suction body (5).

7. Incontinence article according to one or more of the preceding claims characterized in that the area-related amount of the pH regulating agent (7) in a central longitudinal section (32b) of the absorbent body (4) is in g / m² 2 is larger than in a front (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 layer (5) has 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 partially, in particular completely.

10. Incontinence article according to one or more of claims 5 to 9 characterized in that the first absorbent layer (5) has a first area (22), and wherein the first absorbent layer (5) has SAP (20) in the first area (22).

11. Incontinence article according to claim 10 characterized in that the first area (22) adjoins the channel (16), in particular that the first area (22) completely surrounds the channel (16).

12. Incontinence article according to one or more of claims 5 to 11 characterized in that the storage absorbent body (23) has a second absorbent layer (6), wherein 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).

13. Incontinence article according to claim 12 characterized in that the second absorbent layer (6) has less than 20% by weight, in particular less than 15% by weight, further in particular less than 10% by weight, further in particular less than 5% by weight SAP (20), in particular is free of SAP (20).

14. Incontinence article according to one or more of claims 8 to 13 characterized in that the channel (16) comprises or is formed by a recess extending through the first absorbent layer (5) in the thickness direction (21).

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

16. Incontinence article according to one or more of the preceding claims characterized in that the pH regulating agent (7) is particle-shaped.

17. Incontinence article according to claim 16 characterized in that at least 50 percent by weight of the pH regulating agent (7) has a particle size of 10 to 2000 pm, in particular of 50 to 1200 pm, and further in particular of 80 to 800 pm.

18. Incontinence product according to one or more of the preceding claims, characterized in that the area-related amount of pH regulating agent (7) in the transfer component (15) is 5 to 100 g / m² 2 , especially 7 to 90 g / m² 2 , especially 10 to 80 g / m² 2 amounts.

19. Incontinence article according to one or more of the preceding claims characterized in that the pH regulating agent (7) comprises trisodium citrate, monosodium citrate or disodium citrate.

20. Incontinence article according to claim 19 characterized in that the pH regulating agent (7) consists of monosodium citrate or disodium citrate.

21. Incontinence product according to one or more of the preceding claims, characterized in that the incontinence product maintains a skin-friendly pH value over at least two, in particular at least three, micturition events.

22. Incontinence article according to claim 21 characterized in that the pH value on an upper surface of the incontinence article facing the skin is a value of 4.0-6.5, in particular 4.2-6.2, further in particular 4.3-6.0, further in particular 4.5-5.8, further in particular 4.7-5.

7.

23. Incontinence article according to one or more of claims 8 to 22 characterized in that the channel (16) of the first absorbent layer (5) is substantially free of SAP (20).

24. Incontinence article according to one or more of claims 12 to 23, characterized in that the first (5) and / or the second absorbent layer (6) 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 regulating agent (7), and in particular is free of pH regulating agent (7).

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