Incontinence article with ph regulator

Abstract

The present invention relates to an incontinence article for the absorption of bodily excretions, comprising an at least regionally liquid-permeable topsheet, a substantially liquid-impermeable backsheet, and an absorption body arranged between the topsheet and the backsheet, wherein the incontinence article has a pH regulator arranged between the topsheet and the backsheet, wherein the pH regulator is arranged in at least a first region and a second region, wherein the first region and the second region each have a longitudinal extent and a transverse extent, wherein the first region and the second region are spaced apart from each other, in a transverse direction of the incontinence article, in such a way that a central region located between the first region and the second region and at least partially overlapping a longitudinal central axis of the absorption body is substantially free of pH regulator.

Description

[0001] Title: Incontinence products with pH regulator

[0002] Description

[0003] The present invention relates to an incontinence article for absorbing body excretions with a 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; this is a skin inflammation in the perineal, perigenital, or perigluteal 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 often contain superabsorbent materials that can absorb and permanently bind large amounts of urine. Furthermore, with an appropriate design of the incontinence product, for example, with perforated cover layers, fluids can be absorbed more quickly into the incontinence product and thus transported away from the user's skin.Some incontinence products also have grooves or depressions designed to improve fluid flow and distribution. Furthermore, substances are sometimes incorporated into the absorbent material of the absorbent body to regulate the pH of the absorbed body fluids.

[0005] However, it often happens that during a urination event a large amount of urine hits the incontinence product in a short space of time, i.e. in a gush, so that the product cannot drain this volume quickly enough. The urine can initially collect in the crotch area of ​​the incontinence product or spread across the surface of the absorbent body from the point of impact before it can be completely absorbed by the absorbent body. This results in longer and larger skin contact, which can easily lead to skin irritation. There is therefore still a need for improved incontinence products. Incontinence products for adults have been known for a long time and often have 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 generally be designed in a variety of ways, for example as incontinence products such as diapers that are applied to the body or as pad-like inserts that are inserted into clothing.

[0006] The prior art includes approaches to providing incontinence articles with a pH control agent. WO2012121932A1 teaches an absorbent article that, during use, comes into direct contact with the user's skin. The article contains a composition comprising citric acid and a salt of this acid for regulating the pH of urine, which is more effective when not in contact with the topsheet. Therefore, WO2012121932A1 teaches that the composition be premixed with absorbent material or be arranged between, for example, two absorbent layers or a transfer layer and the absorbent body. In any case, the composition should not come into contact with the topsheet when dry.

[0007] The inventors have recognized that such an arrangement can have disadvantages. On the one hand, the body fluid that only comes into contact with the composition in the absorbent core or after passing through an absorbent layer can easily wash it out as it penetrates into deeper absorbent layers, or it can only come into contact with the composition in deeper absorbent layers. Control of the pH value on a skin-facing surface of the incontinence article can thus be uneven and / or insufficient. On the other hand, in the event of a large amount of body fluid, it can often not be drained quickly enough into the interior of the absorbent body. This can lead to the body fluid, containing an undesirably large amount of the agent, remaining on the skin-facing surface of the incontinence article for an extended period of time - particularly with a concentrated arrangement of the pH-regulating agent.There is then a risk of prolonged contact with the user's skin and skin irritation, even due to the pH-regulating agent.

[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 longitudinal direction, a transverse direction, 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 and having a longitudinal central axis, wherein the incontinence article has a pH regulating agent arranged between the top sheet and the back sheet, wherein the pH regulating agent is arranged in at least a first region and a second region, wherein the first region and the second region each have a longitudinal extension and a transverse extension, wherein the first region and the second region are spaced apart from one another in the transverse direction of the incontinence article in such a way thatthat a central region located between the first region and the second region and at least partially overlapping the longitudinal center axis of the absorption body is substantially free of pH regulating agent.

[0010] Due to human anatomy, incontinence products are often in close contact with the user's skin, especially in their lateral sections. This is particularly true in the crotch section of the incontinence product, which lies between the user's legs, i.e., in the area of ​​the interlabial fold and / or the gluteal fold. Closer contact is particularly desirable in the lateral areas of the incontinence product to improve leakage protection, so incontinence products are often designed to rest directly against the user's skin. Furthermore, a certain degree of lateral compression of the incontinence product by the legs can also occur. The arrangement according to the invention advantageously allows the pH regulator to act primarily where the incontinence product can come into closer contact with the skin.In the central area, however, which is essentially free of pH regulator, contact with higher amounts of pH regulator can be avoided. This can reduce the risk of irritation of the typically central, often more sensitive perigenital and / or perigluteal skin areas. The pH regulator can therefore act primarily where pH control is desirable due to its proximity to the skin, reducing the risk of irritation of more sensitive skin areas.

[0011] In the context of this invention, the term "longitudinal direction" refers to the direction from the abdominal end, i.e., the front end, of the incontinence article during use, to the back end, i.e., the rear end. The "transverse direction" is to be understood as the direction of the incontinence article oriented perpendicular to the longitudinal direction in the planar extension of the incontinence article, possibly unfolded and in any case flatly spread out.

[0012] Topsheet and backsheet materials are well known in the art. The backsheet can, in particular, comprise or be formed from a breathable, yet substantially liquid-tight film material. The backsheet is preferably formed from a nonwoven-film laminate. A nonwoven-film laminate can have advantageous haptic and / or acoustic properties for the user, as the material often feels softer and rustles less than a film material without a nonwoven component. The topsheet is designed to be liquid-permeable, at least in some regions, in particular completely. The topsheet comprises or is formed from preferably a film material and / or a nonwoven material. The topsheet is preferably a spunbond nonwoven material comprising or consisting of a synthetic polymer such as polyolefin, in particular polypropylene. Nonwoven materials comprising or consisting of natural fibers are also conceivable in principle.

[0013] In a preferred embodiment, the first region and the second region are each strip-shaped, such that the respective longitudinal extent of the first region and the second region is greater than the transverse extent of the respective first region or second region. This advantageously allows the pH of the body fluid passed on in the longitudinal direction of the incontinence article to be effectively regulated even in regions of the incontinence article further away from a region of first impact. The longitudinal extent of a respective first region or second region is to be measured along the longitudinal direction of the incontinence article. The transverse extent of the respective first region or second region is to be measured along the transverse direction of the incontinence article. The longitudinal extent and the transverse extent are each a maximum extent of the respective region in the respective direction of the incontinence article.

[0014] The term "strip-shaped" is to be understood to mean that the first region and / or the second region is preferably substantially rectangular. However, the first region and / or the second region can also be oval, elliptical, almond-shaped, curved, wavy, L-shaped, C-shaped, bone-shaped or in any other conceivable shape, provided that the respective first region and / or the second region extends further in the longitudinal direction than in the transverse direction. The decisive factor here is the distance in the transverse direction from an end closest to the longitudinal center axis of the absorbent body to an end of the respective first region or second region furthest from the longitudinal center axis of the absorbent body.

[0015] In an alternative embodiment, the pH regulator is arranged in more than two regions, i.e. in one or more regions additional to the first region and the second region, for example in the first region and the second region and a third region and / or a fourth region and / or a fifth region and / or a sixth region and / or a seventh region and / or an eighth region. The additional region or regions is or are each spaced apart from the first region and / or from the second region and / or from each other in the transverse direction such that between each two spaced-apart and closest regions from the group of first region, second region, third region, fourth region, fifth region, sixth region, seventh region, and eighth region, a further region essentially free of pH regulator is arranged.

[0016] The additional region or regions is or are preferably strip-shaped and, with respect to a respective longitudinal extent, preferably formed analogously to the first region and / or the second region.

[0017] Preferably, the first region and the second region are mirror-symmetrical on both sides of the longitudinal center axis of the absorbent body. This offers the user the advantage that the pH regulating agent is present on both sides of the longitudinal center axis of the absorbent body, in particular over a substantially equal and uniform area. The risk of significantly different pH regulating performance between the first region and the second region, and thus a one-sided increased risk of skin irritation, can thus be reduced.

[0018] In a preferred embodiment, the respective transverse extent of the first region and / or the second region has a value of 10-60 mm, in particular 15-50 mm, more particularly 20-40 mm. Advantageously, pH regulation can therefore be achieved over a relatively large overall extent in the transverse direction. Particularly in the case of higher fluid accumulation, which can easily lead to a rather large distribution of the fluid on the skin-facing surface of the incontinence article, it is therefore possible to quickly regulate the pH value over a larger area of ​​the incontinence article, and in particular toward the lateral edges of the article.

[0019] In a preferred embodiment, the central region directly borders the first region and the second region. This advantageously enables pH regulation on both sides of the central region, thus on both sides of the longitudinal center axis of the absorbent body. A transverse extent of the central region preferably has a value of 3-50 mm, in particular 5-40 mm, furthermore in particular 8-35 mm, furthermore in particular 10-30 mm, furthermore in particular 15-25 mm. The transverse extent of the central region is to be understood as a minimum extent of the central region in the transverse direction of the incontinence article, thus a distance in the transverse direction from an end of the first region closest to the longitudinal center axis of the absorbent body to an end of the second region closest to the longitudinal center axis of the absorbent body.

[0020] Preferably, a ratio of the respective transverse extent of the first region and / or the second region to the transverse extent of the central region is 0.2-20, in particular 0.7-15, further in particular 1-10, further in particular 2-5.

[0021] In a preferred embodiment, the respective longitudinal extent of the first region and / or the second region has a value of at least 50 mm, in particular at least 60 mm, further in particular at least 70 mm, further in particular at least 80 mm, further in particular at least 90 mm, further in particular at least 100 mm. This advantageously enables the pH value of body fluid absorbed into the incontinence article to be regulated over a relatively large area extending in the longitudinal direction, for example in the case of a relatively large impact area or a larger initial spread of a larger quantity of fluid over a larger area on the skin-facing surface of the incontinence article.

[0022] Preferably, the first region and / or the second region are located at least partially in the crotch section of the incontinence article. For example, if the first region and / or the second region are arranged in the crotch section of the incontinence article, i.e., in a section of the incontinence article that lies between the user's legs and / or encompasses a micturition area of ​​the incontinence article or extends beyond the micturition area, the body fluid can quickly come into contact with the pH regulating agent across a longitudinal extent of the section or micturition area. In the context of this invention, the term "micturition area" refers to an area in which body fluid is likely to impinge during use, in particular urine during micturition.

[0023] In a preferred embodiment, the respective longitudinal extent of the first region and / or the second region has a value of 10-100%, in particular 15-80%, further in particular 25-75% of a longitudinal extent of the absorbent body. The longitudinal extent of the absorbent body is a maximum extent of the absorbent body from a frontmost end to a rearmost end of the absorbent body, measured in the longitudinal direction of the incontinence article. Such a dimensioned longitudinal extent of the first region and / or second region advantageously improves more uniform pH regulation in the longitudinal direction of the incontinence article, in particular also in areas farther away from the micturition area.

[0024] The inventors have discovered that incontinence products are frequently changed before reaching a high fill level as a precautionary measure to prevent potential leakage, but that users avoid changing them too frequently for cost-saving reasons. Therefore, a medium longitudinal extension of the first and / or second regions relative to the longitudinal extension of the absorbent body may be advantageous in various application situations.

[0025] In the case of prolonged use of the respective incontinence product until a high fill level is reached, for example, at night, a longitudinal extension of the first and / or second zone over a relatively large portion of the absorbent body's length, thus arranging the pH regulator over a relatively large area, can reduce the risk of skin irritation. Arranging the pH regulator over 100% of the absorbent body's length, i.e., a continuous longitudinal arrangement across the entire absorbent body, also offers process-related advantages over a discontinuous arrangement.

[0026] A relatively small longitudinal extension of the first region and / or second region relative to the longitudinal extension of the absorbent body can be used, particularly in situations involving frequent changes of the incontinence product, for example, during the day or during frequent urinations with a small fluid volume each time, to provide pH regulating agents in a smaller section of the incontinence product. This advantageously reduces the cost per incontinence product while simultaneously avoiding or unduly increasing the risk of skin irritation. Thus, the user can benefit from advantageous pH regulation over a longer period of time at a relatively low overall cost.

[0027] In an alternative embodiment, if the longitudinal extent of the first region and the second region is less than 100%, in particular less than 90%, further in particular less than 80%, further in particular less than 70% of the longitudinal extent of the absorbent body, a rear section of the absorbent body arranged in the longitudinal direction between the first region and / or the second region and a rear end of the incontinence article, and / or a front section of the absorbent body arranged in the longitudinal direction between the first region and / or the second region and a front end of the incontinence article can comprise pH regulating agents.

[0028] This also allows for the pH to be regulated more quickly for partial amounts of urine which, when hit in a gush, may initially spread on the skin-side surface of the incontinence article and are only absorbed in the rear or front section of the absorbent body.

[0029] However, it is also conceivable that the front and / or rear portion of the absorbent body is substantially free of pH regulating agent.

[0030] In a preferred embodiment, the longitudinal extent of the central region is at least equal to the longitudinal extent of the first region and / or the second region, and / or equal to the longitudinal extent of the absorbent body. This advantageously at least reduces the placement of pH regulating agent in a region located transversely centrally of the incontinence article, thus an area that can easily come into close contact with the user's often more sensitive mucous membranes, thereby reducing the risk of irritation to these skin areas.

[0031] The pH regulating agent is preferably arranged between the topsheet and the absorbent body. This advantageously facilitates rapid contact of the body fluids absorbed into the incontinence product with the pH regulating agent, so that pH control can be initiated before it reaches a permanent storage location. The topsheet can advantageously help prevent premature leakage of the pH regulating agent and thus a loss of function before the incontinence product is actually used. Furthermore, the topsheet can act as a separating layer between the user's skin and the pH regulating agent, helping to prevent the pH regulating agent from being prematurely activated before urination, for example due to small amounts of skin perspiration, which could potentially adversely affect the skin's pH.

[0032] The pH regulating agent is preferably arranged by the manufacturer on an upper side of the absorbent body facing the body during use or on an upper side of the first absorbent body layer facing the body during use. Alternatively, the pH regulating agent can be applied by the manufacturer to an upper side of the topsheet facing away from the body during use. It is also conceivable for the pH regulating agent to be arranged by the manufacturer inside the absorbent body or the first absorbent body layer, distributed uniformly or non-uniformly along a thickness direction of the incontinence article. The thickness direction of the incontinence article runs perpendicular to the longitudinal direction and the transverse direction of the incontinence article.

[0033] In a preferred embodiment, the absorbent body comprises at least a first absorbent layer. More preferably, the absorbent body comprises a first absorbent layer and a second absorbent layer arranged between the first absorbent layer and the backsheet. This allows body fluid absorbed during use and coming into contact with, or then coming into contact with, the pH regulator to be advantageously channeled relatively quickly into the interior of the absorbent body and collected there, allowing an increasingly uniform desired pH value to be established.

[0034] The absorbent body of the incontinence article is designed and constructed to absorb and permanently store body fluids, particularly urine. The term "absorbent body layer" refers to a layer of the absorbent body that has the actual task of absorbing, and thus, at least temporarily, particularly permanently storing, body fluids. For this purpose, the absorbent body and / or the first absorbent body layer and / or the second absorbent body layer can comprise or be formed from one or more absorbent materials such as cellulose fibers ("fluff") or synthetic fibers.

[0035] In a preferred embodiment, the absorbent body, in particular the first absorbent layer, comprises superabsorbent polymer. Superabsorbent polymer offers the advantage of being able to store large amounts of liquid compared to other absorbent materials such as cellulose fibers. Furthermore, superabsorbent polymer can permanently bind the stored liquid, even under a certain degree of increased pressure. Therefore, the superabsorbent polymer in the absorbent body and / or the first absorbent layer helps to reduce prolonged contact between body fluids and the user's skin, thus reducing the risk of skin irritation.

[0036] The absorbent body preferably contains superabsorbent polymer at 5 - 100

[0037] percent by weight, preferably 10 - 95 percent by weight, more preferably 15 - 90

[0038] Weight percent, more preferably 20-80 weight percent. Preferably, the superabsorbent polymer can absorb at least 15 times its weight, especially at least 20 times its weight, more preferably at least 30 times its weight of 0.9 weight percent saline solution (measured according to NWSP 242.0. R2(15)).

[0039] The superabsorbent polymer can, for example, be in particle or fiber form, or in sheet or foam form. The superabsorbent polymer can further comprise or consist of a substantially pure polymer material or a mixture of two or more polymer materials.

[0040] The second absorbent layer advantageously results in greater wearing comfort, especially with an incontinence product that fits closer to the body, since a softer haptic impression of the incontinence product is promoted from one backsheet side and thus a reduced risk of skin irritation caused, for example, by hardening of the incontinence product.

[0041] The second absorbent layer preferably comprises less than 20 weight percent, more preferably less than 15 weight percent, more preferably less than 10 weight percent, more preferably less than 5 weight percent superabsorbent polymer; in particular, the second absorbent layer is free of superabsorbent polymer. It is well known to those skilled in the art that particulate material such as superabsorbent polymer can exert abrasive forces that, under certain circumstances, can damage the substantially liquid-impermeable backsheet, in particular a liquid-impermeable backsheet film, of the incontinence article and lead to leakage. Therefore, the second absorbent layer also offers the advantage of further reducing the risk of unwanted leakage of body fluid and the resulting potential skin irritation.

[0042] The absorbent body may be rectangular, triangular, oval, T-shaped, hourglass-shaped, Y-shaped, anatomical, asymmetrical or in any other shape deemed suitable by a person skilled in the art.

[0043] It should be noted that the absorbent body and / or the first absorbent body layer and / or the second absorbent body layer can have a uniform thickness and / or a uniform density. It is also conceivable for the absorbent body and / or the first absorbent body layer and / or the second absorbent body layer to have a thickness or height profile or a density profile.

[0044] It is also conceivable to form the first and / or second absorbent body layer of the absorbent body by arranging one or more layers of different absorbent material, in particular fiber material. Core wrappings made of flat materials, for example, fiber materials of artificial and / or natural origin, are also well known in the art.

[0045] In an advantageous embodiment, the incontinence article comprises a fluid absorption and / or distribution layer, wherein the fluid absorption and / or distribution layer is arranged in particular between the topsheet and the absorbent body. The fluid absorption and / or distribution layer supports the relatively rapid conduction of body fluids from the skin-facing surface of the incontinence article to the absorbent body and / or the first absorbent body layer. Furthermore, the fluid absorption and / or distribution layer arranged between the topsheet and the absorbent body can serve as a spacer between the body fluid collected in the absorbent body or in the first absorbent body layer and the skin-facing surface of the incontinence article, so that the risk of skin irritation can be further reduced in an advantageous manner.

[0046] Fluid absorption and / or distribution layers are already generally known in the art and typically consist of a fiber material, in particular a nonwoven material.

[0047] 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).

[0048] A multicomponent fiber has a cross-section comprising more than a single section, each of which comprises or consists of 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 different regions across the cross-section of the fiber and often 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.

[0049] The basis weight of nonwoven materials is usually measured in grams per square meter (g / m 2 ) is indicated.

[0050] The fluid absorption and / or distribution layer can be designed in such a way that it advantageously supports rapid fluid absorption of body fluids passing through the topsheet or improved fluid distribution in the surface direction, or both. For this purpose, the fluid absorption and / or distribution layer can be designed as a single layer or multiple layers, for example, as a two-layered layer with a fluid absorption layer and a fluid distribution layer. Preferably, the fluid absorption and / or distribution layer is designed as a single layer, i.e., from a substantially uniform material.

[0051] In a preferred embodiment, the liquid absorption and / or distribution layer is formed as a nonwoven material made of artificial fibers and more preferably has a basis weight of 10 - 80 g / m 2 , especially 15 - 70 g / m 2 , furthermore in particular 20 - 60 g / m 2, furthermore in particular 30 - 50 g / m 2 The inventors have discovered that artificial fiber nonwovens, due to their often rather hydrophobic properties, can have an advantageous effect in that once absorbed, body fluid can better remain inside the incontinence article. With the preferred basis weight, the fluid absorption and / or distribution layer can advantageously counteract excessive backflow of body fluid toward the topsheet without excessive bulk in the thickness direction or impairing the softness of the incontinence article perceived by the user when worn. Therefore, the risk of skin irritation due to prolonged contact with body fluids such as urine or due to a certain roughness of the incontinence article is further reduced.

[0052] In a preferred embodiment, the fluid absorption and / or distribution layer 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.

[0053] 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.

[0054] As an alternative, it is known in the art to use a material made of cellulose fibers, in particular chemically modified cellulose fibers, for example, cross-linked cellulose fibers, as the fluid absorption and / or distribution layer. The fluid absorption and / or distribution layer may also comprise or consist of other materials such as perforated films or foams or the like.

[0055] The fluid absorption and / or distribution layer can overlap the absorbent body substantially completely or only partially, thus having substantially the same areal extent or, at least in some regions, a smaller extent than the first absorbent layer and / or the second absorbent layer of the absorbent body in the longitudinal and / or transverse direction of the flat incontinence article. The fluid absorption and / or distribution layer preferably overlaps the first absorbent layer and / or the second absorbent layer of the absorbent body by 5-100%, in particular by 10-90%, more particularly by 15-80%, more particularly by 20-70%, more particularly by 25-60%, more particularly by 30-50% of its areal extent.

[0056] Preferably, the fluid absorption and / or distribution layer is arranged at least in the micturition area. In particular, the fluid absorption and / or distribution layer extends over and in the region of the longitudinal center axis of the absorbent body. Furthermore, in particular, the fluid absorption and / or distribution layer extends over and in the region of a transverse center axis of the absorbent body.

[0057] In a preferred embodiment, at least 30 weight percent, in particular at least 40 weight percent, further in particular at least 50 weight percent, further in particular at least 60 weight percent, further in particular at least 70 weight percent, further in particular at least 80 weight percent, further in particular at least 90 weight percent, further in particular 100 weight percent of the pH regulating agent is arranged between the fluid absorption and / or distribution layer and the backsheet. This advantageously results in absorbed body fluid coming into contact with the pH regulating agent immediately after passing through the fluid absorption and / or distribution layer, and the pH value can be regulated very quickly and effectively. In a preferred embodiment, the pH regulating agent is arranged between the fluid absorption and / or distribution layer and the first absorbent layer.More preferably, the pH regulating agent is arranged between the fluid absorption and / or distribution layer and the absorbent body. When the pH regulating agent is arranged between two components of the incontinence article, such as the topsheet and absorbent body, the fluid absorption and / or distribution layer and the first absorbent body layer, or the fluid absorption and / or distribution layer and the absorbent body, the arrangement of the pH regulating agent refers to the arrangement provided by the manufacturer, thus to the location of the manufacturer's application of the pH regulating agent in the incontinence article. Since the absorbent body and / or the first absorbent body layer typically have cavities to fulfill their intended function, it is possible that a small amount of the applied pH regulating agent can migrate from an intended application site, in particular in the thickness direction of the incontinence article.In such cases, the manufacturer’s application location is decisive.

[0058] A total amount of pH regulating agent per incontinence article, which is intended in particular for use by adults, is preferably 0.05 to 3.00 g, more preferably 0.05 to 2.50 g, more preferably 0.10 to 2.00 g, more preferably 0.15 to 1.50 g, more preferably 0.20 to 1.00 g, more preferably 0.25 to 0.80 g, more preferably 0.30 to 0.70 g.

[0059] In a preferred embodiment, the absorbent body has at least one channel oriented in the longitudinal direction, in particular precisely one channel oriented in the longitudinal direction. A channel is considered to be "oriented in the longitudinal direction" if the channel extends further in the longitudinal direction of the incontinence article than in the transverse direction of the incontinence article.

[0060] In an alternative embodiment, the absorption body has 2 - 5, more particularly exactly 2 channels.

[0061] The one channel or channels each serve to more quickly absorb larger quantities of bodily fluids such as urine and to direct them to regions of the absorbent body further away from the urination area. This allows the bodily fluid to be absorbed more quickly overall, so that contact time with the user's skin can be advantageously shortened and pH regulation can occur more quickly. In a preferred embodiment, the at least one channel or exactly one channel is symmetrical, in particular mirror-symmetrical, with the longitudinal center axis of the absorbent body as the axis of symmetry. Purely as a precautionary measure to avoid any possible ambiguities, it should be noted that the phrase "the at least one channel" is to be understood generally as "at least one of the channels".With reference to this embodiment, it is hereby explained in more detail that in the case that the absorption body has more than one channel, at least one of the existing channels is designed symmetrically, in particular mirror-symmetrically, with the longitudinal center axis of the absorption body as the axis of symmetry.

[0062] The symmetrical design improves a more even fluid distribution across the absorbent core halves located on either side of the longitudinal center axis, resulting in faster overall absorption and pH regulation of body fluids. Furthermore, the desired more even fluid distribution can also increase the wearer's comfort.

[0063] Preferably, at least one channel or precisely one channel is arranged parallel to the longitudinal center axis of the absorbent body and / or a longitudinal center axis of the first absorbent body layer and / or a longitudinal center axis of the incontinence article. In particular, at least one channel or precisely one channel is arranged on the respective longitudinal center axis of the incontinence article and / or the absorbent body and / or the first absorbent body layer.

[0064] At least one channel or exactly one channel is preferably arranged centered in the transverse direction of the absorbent body and / or the first absorbent body layer.

[0065] Advantageously, at least one channel or exactly one channel in the longitudinal direction of the incontinence article is arranged at least partially in the micturition area.

[0066] Further preferably, the at least one channel or exactly one channel advantageously extends beyond the transverse central axis of the absorption body.

[0067] In a preferred embodiment, at least one channel, or exactly one channel, extends linearly in the longitudinal direction of the incontinence article and / or the absorbent body and / or the first absorbent body layer. This allows the fluid to spread more freely in the channel in the longitudinal direction of the incontinence article.

[0068] However, wavy, jagged, or curved channel shapes, or any other channel shape deemed appropriate by a person skilled in the art, are also conceivable. Various channel shapes, such as rectangular, almond-shaped, bone-shaped, T-shaped, Y-shaped, U-shaped, curved, triangular, oval, star-shaped, radial, or branched, are well known in the art and encompassed by the present invention.

[0069] The inventors have discovered that for rapid fluid flow in the longitudinal direction, channels whose length is greater in the longitudinal direction of the incontinence article than their length in the transverse direction are particularly advantageous. Rectangular, almond-shaped, or oval channels have proven particularly advantageous.

[0070] In a preferred embodiment, the at least one channel or exactly one channel is arranged in the first absorbent body layer and in particular comprises or is formed from a recess extending at least partially, in particular completely, through the first absorbent body layer in the thickness direction.

[0071] The channel is preferably substantially free of absorbent materials. For this purpose, the channel can be formed by omitting the absorbent material or by removing absorbent material by cutting or punching.

[0072] However, it is also conceivable that the channel is formed by embossing or compressing the first absorbent body layer or the absorption body.

[0073] In an alternative embodiment, the at least one channel or exactly one channel can be arranged in the second absorbent layer. In this case, the at least one channel or exactly one channel arranged in the second absorbent layer can preferably have one or more of the features previously described with reference to at least one channel or exactly one channel in the first absorbent layer. It is also conceivable for both the first absorbent layer and the second absorbent layer to have one or more channels.

[0074] In a further preferred embodiment, the at least one channel or the exactly one channel, in particular the at least one channel or the exactly one channel of the first absorbent layer is substantially free of superabsorbent polymer.

[0075] This offers the advantage that the body fluid absorbed into the channel is not prematurely and permanently bound in the channel, but can be passed on relatively unhindered along the channel and thus be distributed more evenly in the absorption body.

[0076] In particular, premature binding of the absorbed body fluid by means of superabsorbent polymer in the channel can hinder or at least delay the pH regulation of the body fluid. In a preferred embodiment, the at least one channel, in particular the exact one channel, is arranged at least partially, in particular entirely, within the central region. This allows the body fluid typically accumulating in the impact area of ​​the incontinence article, which is located more centrally in the transverse direction, to be directed more quickly to more distant areas of the absorbent body, and a buildup of fluid that is not yet adequately pH-regulated near the user's skin can be reduced.

[0077] Preferably, the at least one channel is not arranged in a projection in a thickness direction of the incontinence article of the first region and / or the second region, and is more preferably arranged partially or completely in the projection of the central region. In an alternative embodiment, the at least one channel is arranged at least partially in the projection in the thickness direction of the incontinence article of the first region and / or the second region. For example, the at least one channel can have two or more channel sections extending in the same and / or different directions, which together form a continuous, i.e. uninterrupted, channel, for example a common uninterrupted recess in the first absorbent layer.In such a case, the at least one channel can be oriented entirely or partially in the longitudinal direction and / or the transverse direction and / or another direction extending in a plane formed by the longitudinal direction and the transverse direction, and can be arranged to completely or at least partially overlap the first region and / or the second region and / or extend beyond the first region and / or the second region. The at least one channel can optionally extend into sections of the absorption body that are not located in the projection in the thickness direction of the first region and / or the second region and / or the central region.

[0078] The first region and / or the second region is preferably located outside the projection in the thickness direction of the at least one channel. Alternatively, the first region and / or the second region can each be located partially or entirely in the projection in the thickness direction of the at least one channel. In this case, the first region and / or the second region can each be configured to overlap the at least one channel in sections and / or extend beyond the at least one channel in a plane formed by the longitudinal direction and the transverse direction.

[0079] Preferably, the channel does not contain a pH regulator. Since body fluid typically does not remain permanently in the channel during use, but only temporarily passes through it on its way to its actual storage location, the pH regulator may not be effective within the channel. It therefore advantageously serves both to ensure effective pH control during extended wear and to conserve resources if the pH regulator is not located in the channel itself but primarily in areas where the fluid is permanently stored.

[0080] In a preferred embodiment, the respective longitudinal extent of the first region and / or of the second region is at least the same size, in particular greater than a longitudinal extent of the at least one channel, such that a ratio of the respective longitudinal extent of the first region and / or of the second region to the longitudinal extent of the at least one channel has a value of at least 1.0, in particular at least 1.1, more particularly at least 1.3 and / or a value of at most 4.0, in particular at most 3.5, more particularly at most 3.0, more particularly at most 2.7.As a result, areas that are further away from the impact area and that absorb liquid forwarded by the channel are also provided with pH regulating agents, so that effective pH regulation is advantageously supported at least over the entire longitudinal extent of the channel, in particular also in areas of the absorption body that are located in the longitudinal direction in front of and / or behind the channel.

[0081] In a further preferred embodiment, the fluid absorption and / or distribution layer overlaps the at least one channel or the exact one channel at least partially, in particular completely. As a result, body fluids such as urine absorbed by the fluid absorption and / or distribution layer can penetrate more quickly into the interior of the incontinence article and, with the involvement of the respective channel, can be absorbed more quickly by the absorbent body, in particular by the first absorbent body layer and / or the second absorbent body layer. In addition, the fluid absorption and / or distribution layer reduces rewetting towards the user's skin in an area formed by the channel, in particular when small amounts of fluid remain in the channel for a certain time before being permanently absorbed in the absorbent body.

[0082] It has proven advantageous if the pH regulator is in particle form.

[0083] Preferably, at least 50 percent by weight of the pH regulator has a particle size of 10 to 2000 pm, in particular 50 to 1200 pm, more particularly 80 to 800 pm. In principle, pH regulators with smaller or larger particle sizes are also available and usable. However, the preferred particle sizes offer the advantage that particles of this size can dissolve more slowly when wetted with body excretions such as urine than pH regulators of smaller particle sizes, so that the pH regulator is not washed out as quickly during use, and the pH-regulating effect is maintained longer.

[0084] A pH regulator of the preferred particle size is easier to dose and incorporate into the incontinence article, especially into the first absorbent layer, especially in high-speed machines than, for example, very finely powdered pH regulators, since there is less dust development and associated material loss during the manufacturing process.

[0085] In addition, the process-safe arrangement of a specified amount of pH regulator in a specified target area, in particular in the first area and / or second area, is positively influenced.

[0086] 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, which improves the wearing comfort of the incontinence product.

[0087] As an alternative to particulate pH regulators, the pH regulator can also be incorporated into the incontinence article in dissolved form, particularly as an aqueous solution, particularly by spraying and optionally subsequently drying at least one component of the incontinence article. As a further alternative, the pH regulator can also be incorporated into the incontinence article as a suspension or paste.

[0088] 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 controlling the pH of body excretions, such as weak acids or bases, sometimes in combination with a respective salt, 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, 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.The inventors have found that it is advantageous in this regard if the pH regulator contains a salt of citric acid, in particular a sodium salt of citric acid, i.e., trisodium citrate, monosodium citrate, or disodium citrate. The terms monosodium citrate, disodium citrate, and trisodium citrate encompass both the anhydrous form and hydrates of the respective substance.

[0089] In a preferred embodiment, the pH regulator comprises at least one component selected from the group monosodium citrate, disodium citrate, trisodium citrate.

[0090] In a further preferred embodiment, the pH regulator can comprise a combination of two or more citrates, in particular either monosodium citrate and disodium citrate, or monosodium citrate and trisodium citrate, or disodium citrate and trisodium citrate, or monosodium citrate and disodium citrate and trisodium citrate. By selecting or combining the aforementioned components, a fine adjustment of the buffering effect of an incontinence article can be achieved depending on the desired duration of use or absorption capacity of the article, without the risk of developing strongly acidic areas, as is the case with the use of a pure acid as a pH regulator, such as citric acid.

[0091] 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.

[0092] In a preferred embodiment, the pH regulator consists of monosodium citrate or disodium citrate, or a combination of monosodium citrate and disodium citrate. The inventors have found that relatively uniform pH regulation can be advantageously achieved over multiple urination events using monosodium citrate and / or disodium citrate. A further advantage of using monosodium citrate is that, for example, monosodium citrate is less hygroscopic than, for example, citric acid, and therefore unwanted ingress of moisture into the incontinence article prior to use can be reduced. At the same time, this property results in a further advantage of improved flowability, so that monosodium citrate can be dosed more easily and / or applied more securely.The use of only one component as a pH regulator also offers process-related advantages, as no mixing of different components or maintenance of homogeneous mixing during the manufacturing process is required. Furthermore, a uniform buffering effect across the pH regulator-containing areas of the incontinence product is further supported.

[0093] For the avoidance of doubt, it should be noted that the above-described composition of the pH regulator from one or more components is based on the pH regulator being provided by the manufacturer in a substantially dry state and, where appropriate, without taking into account any chemical dissociation in a solution before or during the use situation.

[0094] In a preferred embodiment, the area-related amount of pH regulating agent in the first region and / or second region is 5 to 100 g / m 2 , especially 10 to 90 g / m 2 , further in particular 15 to 80 g / m 2 , further in particular 20 to 70 g / m 2 At the specified surface-related amount, sufficient pH regulator is advantageously present for good application and effective pH control during the incontinence product's usual intended use, without excessive consumption of pH regulator. This results in conservation of resources and relatively lower costs.

[0095] The quantities of the pH regulator are to be understood as referring to an anhydrous pH regulator, for example anhydrous monosodium citrate. If the pH regulator contains one or more hydrates or more than 5% additive substances as described below, the total amount of the pH regulator is given in g / m 2 adjusted such that the total amount of pure and / or anhydrous pH regulator contained corresponds to the above preferred amount.

[0096] 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. This largely prevents skin irritation caused by residues of other substances when using the incontinence product.

[0097] 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%.

[0098] 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.

[0099] 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 parts, belly and back panels firmly connected or resealable by the manufacturer, closure systems or tapes, wings, elasticizations, leak protection systems (e.g. cuffs), wetness indicators, marking means, skin-care or odor-regulating substances or compositions, adhesive or closure or fastening means (e.g. adhesive, hooks, Velcro) as well as other features known to the person skilled in the art or which appear appropriate.

[0100] 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:

[0101] Figure 1 schematically, not to scale, a top view of an incontinence article,

[0102] Figure 2 shows a schematic, not to scale, sectional view of the incontinence article of Figure 1 along a transverse center axis of the absorbent body, Figure 3 shows a schematic, not to scale, sectional view of the incontinence article of Figure 1 along a transverse center axis of the absorbent body analogous to Figure 2 but with an optional second absorbent body layer,

[0103] Figure 4 shows schematically, not to scale, a plan view of an incontinence article with an optional fluid absorption and / or distribution layer,

[0104] Figure 5 shows schematically, not to scale, a sectional view of the incontinence article of Figure 4 along the transverse central axis of the absorbent body,

[0105] Figure 6 schematically, not to scale, a top view of an incontinence article with an optional channel

[0106] Figure 7 shows schematically, not to scale, a sectional view of the incontinence article of Figure 6 along the transverse central axis of the absorbent body, and

[0107] Figure 8 schematically, not to scale, a sectional view of the exemplary incontinence article of Figure 6 along the transverse center axis of the absorbent body analogous to Figure 7 but with an optional second absorbent body layer.

[0108] Figures 9a-c each schematically, not to scale, a top view of an incontinence article with a respective preferably formed channel and a first region and a second region located outside a projection in the thickness direction of the channel

[0109] Figures 10a-f each show schematically, not to scale, a plan view of a

[0110] Incontinence article with at least one respective preferably formed channel and partially arranged in the projection in the thickness direction of the channel first region and second region

[0111] Figure 1 shows, by way of example, an incontinence article 1 according to the invention for absorbing body excretions, comprising a longitudinal direction 11, a transverse direction 10, a topsheet 2 that is at least partially liquid-permeable, a substantially liquid-impermeable backsheet 3, and an absorbent body 4 arranged between the topsheet 2 and the backsheet 3 and having a longitudinal center axis 17. The incontinence article 1 has a pH regulating agent 7 arranged between the topsheet 2 and the backsheet 3. The pH regulating agent 7 is arranged in a first region 13 and a second region 14. The first region 13 and the second region 14 each have a longitudinal extension 22, 23 and a transverse extension 24, 25. The first region 13 and the second region 14 are spaced apart from each other in the transverse direction 10 of the incontinence article 1 such that a gap formed between the first region

[0112] 13 and the second region 14 and at least partially overlapping the longitudinal central axis 17 of the absorption body 4 is essentially free of pH regulating agent.

[0113] In the example shown in Figure 1, the central region 12 directly borders the first region 13 and the second region 14. The first region 13 and the second region 14 are formed mirror-symmetrically on both sides of the longitudinal central axis 17 of the absorption body 4. The first region 13 and the second region 14 therefore have a substantially equally large and uniform area, over which the pH regulating agent 7 is provided, i.e. on both sides of the longitudinal central axis 17. In this example, the first region 13 and the second region 14 are each formed in a strip shape such that the respective longitudinal extent 22, 23 of the first region 13 and the second region 14 is greater than the transverse extent 24, 25 of the respective first region 13 or second region 14. The respective longitudinal and transverse extent of the first region and the second region corresponds to a respective maximum extent of the respective region.In this exemplary incontinence article, the longitudinal extent 22, 23 of the first region 13 and the second region 14 is 140 mm each. The transverse extent 24, 25 of the first region 13 and the second region 14 is 27 mm each in this example. Figure 1 shows the first region 13 and the second region.

[0114] 14 are each shown as rectangular. Alternatively, it is also conceivable to form the first region and the second region in a different shape, for example oval, as described in more detail above. The first region 13 extends essentially the same distance in the longitudinal direction 11 and in the transverse direction 10 as the second region 14. The wording “extends essentially the same distance” is to be understood such that, for example, due to minor deviations in the longitudinal and / or transverse extent that may occur during manufacture of the incontinence article, this should not conflict with the essentially equal extension of the first region and the second region.For this purpose, the respective longitudinal and / or transverse direction of the first region or the second region can deviate by up to 15%, in particular up to 10%, further in particular up to 5% from the respective longitudinal and / or transverse extent of the respective other second region or first region. In an alternative embodiment, the first region and the second region can also be provided as regions extending to different lengths in the longitudinal and / or transverse direction. The first region 13 and the second region 14 in this exemplary incontinence article 1 are located in a crotch section 19 of the incontinence article 1, which lies between the legs of a user during use and comprises a micturition area 9 of the incontinence article 1. The absorbent body 4 is hourglass-shaped, and is therefore narrower in the crotch section 19 than in a front or rear section (without reference symbol).Alternatively, the absorbent body can also be designed in another shape deemed suitable by a person skilled in the art, as described in more detail above, for example, rectangular or oval. The absorbent body 4 and the incontinence article 1 are essentially symmetrical in this example. Furthermore, it is conceivable to design the absorbent body and / or the incontinence article asymmetrically, for example, wider or narrower at the back than at the front.

[0115] The central region 12 has a transverse extension 26, which in this example is 20 mm. The transverse extension of the central region corresponds to a distance in the transverse direction from an end of the first region closest to the longitudinal center axis of the absorbent body to an end of the second region closest to the longitudinal center axis of the absorbent body. The absorbent body 4 of the incontinence article 1 has a longitudinal extension 27 of 310 mm. The respective longitudinal extensions 22, 23 of the first region 13 and the second region 14 in this example amount to 45% of the longitudinal extension 27 of the absorbent body 4.The central region 12, which, as previously explained in more detail, is essentially free of pH regulating agent, has in this exemplary incontinence article a longitudinal extent (not shown in Figure 1) which is equal to the longitudinal extent 27 of the absorbent body 4, and thus greater than the respective longitudinal extent 22, 23 of the first region 13 and the second region 14. In the exemplary incontinence article, the pH regulating agent 7 is particulate and consists of monosodium citrate. However, the pH regulating agent can also comprise one or more components selected from the group consisting of monosodium citrate, disodium citrate, and trisodium citrate. As a further alternative, the pH regulating agent can consist of disodium citrate or, as previously described in more detail, of a combination of, for example, monosodium citrate and disodium citrate.The particulate pH regulator is depicted as a multitude of dots in the respective top views of the incontinence article in Figure 1 and the subsequent Figures 4 and 6. For the sake of simplicity, the pH regulator is depicted as continuous lines in the subsequent sectional views of Figures 2, 3, 5, 7, and 8.

[0116] As shown in Figure 2 in the sectional view along the transverse central axis 18 of the absorption body

[0117] 4 of the exemplary incontinence article 1 of Figure 1, the pH regulating agent 7 is arranged between the topsheet 2 and the absorbent body 4. In this example, the absorbent body 4 has a first absorbent layer 5. The absorbent body 4, thus in this example the first absorbent layer 5, comprises superabsorbent polymer (not shown). Alternatively, the absorbent body and / or the first absorbent layer can comprise or be formed from one or more absorbent materials such as cellulose fibers (“fluff”) or plastic fibers or a mixture thereof. In an alternative embodiment, the absorbent body 4, as shown in Figure 3, can also comprise more than one absorbent layer, here the first absorbent layer

[0118] 5 and a second absorbent layer 6 arranged between the first absorbent layer 5 and the backsheet 3. In this exemplary embodiment, the first absorbent layer comprises a mixture of cellulose fibers and superabsorbent polymer, and the second absorbent layer is formed from cellulose fibers. In Figure 3, the first absorbent layer 5 and the second absorbent layer 6 extend the same distance in the transverse direction 10 and in the longitudinal direction (not shown). It is conceivable that the first absorbent layer alternatively extends less far or further in the transverse direction and / or in the longitudinal direction than the second absorbent layer.

[0119] Figure 4 shows an exemplary incontinence article 1a comprising an optional fluid absorption and / or distribution layer 15. The fluid absorption and / or distribution layer 15 extends across the micturition area 9, the longitudinal center axis 17, and the transverse center axis 18 of the absorbent body 4. As shown in Figure 5 in the sectional view of the exemplary incontinence article 1a of Figure 4, the fluid absorption and / or distribution layer 15 is arranged between the topsheet 2 and the absorbent body 4 in this example. The fluid absorption and / or distribution layer 15 consists of a single-layer carded and hot-air-bonded nonwoven material made of synthetic bicomponent fibers (Bico / PES) with a basis weight of 40 g / m 2As already explained, other materials described in more detail above are also conceivable for use as the fluid absorption and / or distribution layer. In this exemplary incontinence article 1a, the pH regulating agent 7 is arranged entirely, i.e., 100 percent by weight, between the fluid absorption and / or distribution layer 15 and the backsheet 3. The pH regulating agent 7 is arranged between the fluid absorption and / or distribution layer 15 and the absorbent body 4. Another arrangement of the pH regulating agent is conceivable, as described in more detail above.

[0120] Figure 6 shows an exemplary incontinence article 1b comprising an absorbent body 4 with an optional channel 16 oriented in the longitudinal direction 11. The illustrated incontinence article 1b has precisely one channel 16 oriented in the longitudinal direction 11, which is mirror-symmetrical with the longitudinal central axis 17 of the absorbent body 4 as the axis of symmetry. The channel 16 is arranged entirely within the central region 12. The channel 16 does not comprise any pH regulating agent. As shown in Figure 7 in a sectional view of the exemplary incontinence article 1b of Figure 6, the channel 16 is arranged in the first absorbent body layer 5. The channel 16 is formed from a recess extending entirely through the first absorbent body layer 5 in the thickness direction 21. Alternatively, it is conceivable for the channel to extend only partially through the first absorbent body layer in the thickness direction.It is also conceivable to provide more than one channel in the first absorbent layer.

[0121] The channel 16 is arranged centered in the transverse direction 10 of the absorbent body 4 and the first absorbent body layer 5. As can be further seen from Figure 6, the channel 16 is arranged partially in the micturition area 9 such that it extends in the longitudinal direction 11 beyond the micturition area 9. In this example, the channel 16 extends beyond the transverse central axis 18 of the absorbent body 4. The channel 16 has a rectangular and rectilinear shape. Alternative shapes are also conceivable, as described in more detail above.

[0122] In an alternative embodiment, the absorbent body 4 having the at least one channel 16, as shown in Figure 8, can have an optional second absorbent body layer 6 arranged between the first absorbent body layer 5 and the backsheet 3. In this embodiment, the channel 16 extends completely through the first absorbent body layer 5 in the thickness direction 21. The second absorbent body layer 6 has no channel. Alternatively, it is conceivable that the second absorbent body layer also has at least one channel or exactly one channel, which can partially or completely overlap with the channel of the first absorbent body layer in the thickness direction, or is arranged offset from the channel of the first absorbent body layer in the transverse direction or longitudinal direction of the incontinence article.

[0123] In the exemplary incontinence article 1b shown in Figure 6, the respective longitudinal extent 22, 23 of the first region 13 and the second region 14, each of 140 mm, is greater than a longitudinal extent 28 of the channel 16 of 70 mm. The ratio of the respective longitudinal extent 22, 23 of the first region 13 and the second region 14 to the longitudinal extent 28 of the channel 16 has a value of 1.5.

[0124] Figures 9 and 10 show incontinence articles with at least one optional, differently shaped channel. The representation of the number and shapes of channels is not to be considered exhaustive, but merely a section of the variants encompassed by the invention and described in more detail above. For reasons of clarity, the pH regulating agent is not shown. The first region 13 and the second region 14 are indicated by a dotted border line, as in the previous Figures 1, 4, and 6. Figures 9a, 9b, 9c each show a schematic, not to scale, top view of an incontinence article 1c, 1d, 1e with a respective preferably formed channel 16a, 16b, 16c and the first region 13 and second region 14 located outside a projection in the thickness direction (not shown) of the channel 16a, 16b, 16c.

[0125] The channel 16a in Figure 9a is oval and mirror-symmetrical with the longitudinal center axis 17 of the absorption body 4, oriented in the longitudinal direction 11, and arranged entirely within the central region 12. The first region 13 and the second region 14 extend further in the longitudinal direction 11 than the channel 16a. It is also conceivable that the channel and the first region and / or the second region extend substantially equally in the longitudinal direction. The first region 13 and the second region 14 are each located outside the projection in the thickness direction (not shown) of the channel 16a. The channel 16a does not have a pH regulator.

[0126] The channel 16b in Figure 9b is oval and mirror-symmetrical with the longitudinal center axis 17 of the absorption body 4 and oriented in the longitudinal direction 11. In this example, the channel 16b extends further in the longitudinal direction 11 than the first region 13 and the second region 14. It is also conceivable that the channel and the first region and / or the second region extend substantially the same distance in the longitudinal direction. The first region 13 and the second region 14 are each located outside the projection in the thickness direction (not shown) of the channel 16b. The channel 16b does not have a pH regulator. The channel 16c in Figure 9c is branched and mirror-symmetrical with the longitudinal center axis 17 of the absorption body 4 and oriented in the longitudinal direction 11. In this example, the channel 16c extends further in the longitudinal direction 11 than the first region 13 and the second region 14.It is also conceivable that the channel and the first region and / or the second region extend essentially equally in the longitudinal direction. The first region 13 and the second region 14 are each located outside the projection in the thickness direction (not shown) of the channel 16c. The channel 16c does not have a pH regulator.

[0127] Figures 10a, 10b, 10c each show schematically, not to scale, a top view of an incontinence article 1f, 1g, 1h with a respective alternative, branched channel 16d, 16e, 16f and a first region 13 and a second region 14 partially located in a projection in the thickness direction (not shown) of the channel 16d, 16e, 16f. The channel 16d in Figure 10a and the channel 16e in Figure 10b and the channel 16f in Figure 10c are each mirror-symmetrical with the longitudinal center axis 17 of the absorption body 4, oriented in the longitudinal direction 11 and partially arranged within the central region 12. The first region 13 and the second region 14 extend further in the longitudinal direction 11 than the respective channel 16d, 16e (Figure 10a, Figure 10b). The channel 16f (Figure 10c) extends further in the longitudinal direction 11 than the first region 13 and the second region 14.The first region 13 and the second region 14 are each located partially in the projection and partially outside the projection in the thickness direction (not shown) of the respective channel 16d, 16e, 16f (Figure 10a, Figure 10b, Figure 10c). Alternatively, the first region and / or the second region can each be located entirely in the projection in the thickness direction of the at least one channel. The first region 13 and the second region 14 are each formed to overlap the respective channel 16d, 16e, 16f in sections. The first region 13 and the second region 14 each extend beyond the channel 16d, 16e, 16f in the plane formed by the longitudinal direction 11 and the transverse direction 10. The channel 16d, 16e, 16f is each formed to overlap the first region 13 and the second region 14 in sections.The channel 16f (Figure 10c) extends in the plane formed by the longitudinal direction 11 and the transverse direction 10 beyond the respective first region 13 and the second region 14.

[0128] Figures 10d, 10e, 10f each show a schematic, not to scale, top view of an incontinence article 1i, 1j, 1k with at least one respective alternative channel 16g, 16h, 16i and, partially in a projection in the thickness direction (not shown), the first region 13 and the second region 14 of the respective channel 16g, 16h, 16i. The channel 16g in Figure 10d and the channel 16h in Figure 10e and the two channels 16i in Figure 10f are each mirror-symmetrical with the longitudinal center axis 17 of the absorption body 4 and oriented in the longitudinal direction 11. The channel 16g (Figure 10d) is U-shaped. The channel 16h (Figure 10e) is elliptical. The two channels 16i (Figure 10f) are curved and concave. The channel 16g in Figure 10d and the channel 16h in Figure 10e, as well as the two channels 16i in Figure 10f, extend further in the longitudinal direction 11 than the respective first region 13 and the second region 14.The first region 13 and the second region 14 are each located partially in the projection and partially outside the projection in the thickness direction (not shown) of the respective channel 16g, 16h or of one of the channels 16i (Figure 10d, Figure 10e, Figure 10f). Alternatively, the first region and / or the second region can each be located entirely in the projection in the thickness direction of the at least one channel. The first region 13 and the second region 14 are each formed so as to partially overlap the respective channel 16g, 16h or with one of the channels 16i. The first region 13 and the second region 14 each extend beyond the channel 16g, 16h or one of the channels 16i in the plane formed by the longitudinal direction 11 and the transverse direction 10. The channel 16g, 16h and the channels 16i are each formed so as to overlap the first region 13 and the second region 14 in sections.The channel 16g, 16h and the channels 16i extend in the plane formed by the longitudinal direction 11 and the transverse direction 10 beyond the respective first region 13 and the second region 14.

[0129] Figures 9a, 9b, 9c, 10a, 10b, 10c, 10d, 10e, and 10f each depict a channel. It is also conceivable for the incontinence article to have one or more additional channels. Furthermore, the incontinence article may have one or more of the previously described optional features, such as a first and / or second absorbent layer and / or a fluid absorption and / or distribution layer.

[0130] For the sake of clarity, each figure depicts an incontinence article designed as an incontinence pad. However, as will be readily and clearly recognizable to a person skilled in the art, the features of the invention described herein, as well as the optional features, can also be easily implemented in other body-hugging incontinence articles, such as incontinence pads, panty liners, or sanitary pads with or without additional fastening means for attachment to a garment, open-type incontinence diapers, closed-type incontinence diapers, and medical underpads. Therefore, the invention also encompasses the aforementioned types of incontinence articles.

[0131] 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 parts, belly and back panels firmly connected or resealable by the manufacturer, closure systems or tapes, wings, elasticizations, leak protection systems (e.g. cuffs), wetness indicators, marking means, skin-care or odor-regulating substances or compositions, adhesive or closure or fastening means (e.g. adhesive, hooks, Velcro) as well as other features known to the person skilled in the art or which appear appropriate.

Claims

Patent claims 1. Incontinence article (1) for the absorption of body excretions, comprising a longitudinal direction (11), a transverse direction (10), a top sheet (2) which is at least partially liquid-permeable, a substantially liquid-impermeable back sheet (3) and an absorbent body (4) arranged between the top sheet (2) and the back sheet (3) and having a longitudinal central axis (17), wherein the incontinence article (1) has a pH regulating agent (7) arranged between the top sheet (2) and the back sheet (3), wherein the pH regulating agent (7) is arranged in at least a first region (13) and a second region (14), wherein the first region (13) and the second region (14) each have a longitudinal extension (22, 23) and a transverse extension (24, 25), wherein the first region (13) and the second region (14) in the transverse direction (10) of the Incontinence article (1) are spaced apart from each other in such a way thatthat a central region located between the first region (13) and the second region (14) and at least partially overlapping the longitudinal center axis (17) of the absorption body (4), (12) is essentially free of pH regulators.

2. Incontinence article according to claim 1, characterized in that the first region (13) and the second region (14) are each strip-shaped, such that the respective longitudinal extent (22, 23) of the first region (13) and the second region (14) is greater than the transverse extent (24,25) of the respective first region (13) or second region (14).

3. Incontinence article according to at least one of the preceding claims, characterized in that the first region (13) and the second region (14) are formed mirror-symmetrically on both sides of the longitudinal central axis (17) of the absorption body (4).

4. Incontinence article according to at least one of the preceding claims, characterized in that the respective transverse extent (24, 25) of the first region (13) and / or the second region (14) has a value of 10-60 mm, in particular 15-50 mm, further in particular 20-40 mm.

5. Incontinence article according to at least one of the preceding claims, characterized in that the central region (12) directly adjoins the first region (13) and the second region (14) and in particular has a transverse extension (26) of the central region (12) has a value of 3-50 mm, in particular 5-40 mm, further in particular 8-35 mm, further in particular 10-30 mm, further in particular 15-25 mm.

6. Incontinence article according to at least one of the preceding claims, characterized in that the respective longitudinal extent (22, 23) of the first region (13) and / or the second region (14) has a value of at least 50 mm, in particular at least 60 mm, further in particular at least 70 mm, further in particular at least 80 mm, further in particular at least 90 mm, further in particular at least 100 mm.

7. Incontinence article according to at least one of the preceding claims, characterized in that the respective longitudinal extent (22, 23) of the first region (13) and / or the second region (14) has a value of 10-100%, in particular 15-80%, further in particular 25-75% of a longitudinal extent (27) of the absorption body (4).

8. Incontinence article according to at least one of the preceding claims, characterized in that a longitudinal extension of the central region (12) is at least as large as the longitudinal extension (22, 23) of the first region (13) and / or the second region (14), and / or is as large as the longitudinal extension (27) of the absorption body (4).

9. Incontinence article according to at least one of the preceding claims, characterized in that the pH regulating agent (7) is arranged between the top sheet (2) and the absorbent body (4).

10. Incontinence article according to at least one of the preceding claims, characterized in that the absorbent body (4) has at least a first absorbent body layer (5), in particular a first absorbent body layer (5) and a second absorbent body layer (6) arranged between the first absorbent body layer (5) and the backsheet (3), and wherein in particular the absorbent body (4), further in particular the first absorbent body layer (5) has superabsorbent polymer.

11. Incontinence article according to at least one of the preceding claims, characterized in that the incontinence article comprises a liquid absorption and / or distribution layer (15), wherein the liquid absorption and / or Distribution layer (15) is arranged in particular between the top sheet (2) and the absorption body (4).

12. Incontinence article according to at least one of the preceding claims, characterized in that at least 30 percent by weight, in particular at least 40 percent by weight, further in particular at least 50 percent by weight, further in particular at least 60 percent by weight, further in particular at least 70 percent by weight, further in particular at least 80 percent by weight, further in particular at least 90 percent by weight, further in particular 100 percent by weight of the pH regulating agent (7) is arranged between the liquid absorption and / or distribution layer (15) and the backsheet (3).

13. Incontinence article according to at least one of the preceding claims, characterized in that the pH regulating agent (7) is arranged between the liquid absorption and / or distribution layer (15) and the absorption body (4).

14. Incontinence article according to at least one of the preceding claims, characterized in that the absorption body (4) has at least one channel (16) oriented in the longitudinal direction (11), in particular exactly one channel (16) oriented in the longitudinal direction (11), and wherein the at least one channel (16) or the exactly one channel (16) is designed in particular symmetrically, further in particular mirror-symmetrically with the longitudinal center axis (17) of the absorption body (4) as the axis of symmetry.

15. Incontinence article according to claim 14, characterized in that the at least one channel (16) or the exactly one channel (16) is arranged in the first absorbent layer (5) and in particular comprises or is formed from a recess extending at least partially, in particular completely, through the first absorbent layer (5) in the thickness direction (21).

16. Incontinence article according to at least one of the preceding claims 14 or 15, characterized in that the at least one channel (16), in particular the exactly one channel (16), is arranged at least partially, in particular completely within the central region (12).

17. Incontinence article according to at least one of the preceding claims 14 to 16, characterized in that the channel (16) does not have a pH regulating agent.

18. Incontinence article according to at least one of the aforementioned claims 14 to 17, characterized in that the respective longitudinal extent (22, 23) of the first region (13) and / or of the second region (14) is at least the same size, in particular greater than a longitudinal extent (28) of the at least one channel (16), such that a ratio of the respective longitudinal extent (22, 23) of the first region (13) and / or of the second region (14) to the longitudinal extent (28) of the at least one channel (16) has a value of at least 1.0, in particular at least 1.1, further in particular at least 1.3 and / or a value of at most 4.0, in particular at most 3.5, further in particular at most 3.0, further in particular at most 2.

7.

19. Incontinence article according to at least one of the preceding claims, characterized in that the pH regulating agent (7) comprises at least one component selected from the group consisting of monosodium citrate, disodium citrate, trisodium citrate, in particular that the pH regulating agent (7) consists of monosodium citrate, or consists of disodium citrate, or consists of a combination of monosodium citrate and disodium citrate.

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