Wound dressing for arc-shaped incisions, its use, wound bandage, and kit.

Description

1 / 24 Wound dressing for arc-shaped incisions, its use, wound bandage, and kit. Divided from BR112024014740-1, filed on 01 / 24 / 2023

[001] The invention relates to a wound dressing for arc-shaped incisions, a wound dressing, a wound treatment kit and uses of the wound dressing, wound dressing and wound treatment kit.

[002] Modern wound dressings are typically manufactured from a variety of materials to form a multi-layered wound dressing that allows for better exudate management. These materials include films, adhesives, foams, and nonwoven fabrics. The adaptability of a wound dressing to the injured body site is generally determined by the mechanical properties of its components. Some known wound dressings contain a nonwoven layer to improve the dressing's absorption properties and exudate retention. However, a disadvantage of nonwoven fabric is that it has limited elasticity.

[003] Reduced elasticity of wound dressings can cause problems during use, particularly if the wound dressings are applied to locations where high shear stresses act on the wound dressings, for example, bending a knee or elbow. Limited extensibility of wound dressings can, for example, cause the wound dressings to be less comfortable to wear, the wound dressings to partially separate from the wound, the functionality of the wound dressings to be reduced due to lack of wound coverage, and / or even additional injuries due to mechanical tissue stress, such as blisters or lacerations in the skin.

[004] A wound dressing according to document EP 3 Petition 870260008103, dated 01 / 28 / 2026, p. 15 / 82 2 / 24 Patent EP 3 085 344 B1 comprises a nonwoven layer having discrete groups of rectilinear incisions, each group of incisions comprising at least one first and one second incision extending from a common starting point to endpoints spaced apart from each other. According to patent EP 3 085 344 B1, a dressing becomes more flexible due to the presence of discrete groups of incisions, so that the dressing can better adapt to the user's body and the dressing is under less mechanical stress. According to patent EP 3 085 344 B1, the incisions in a group of incisions are arranged, for example, in a V-shape or a star shape. However, at the common starting points of a first and second incision of a group of rectilinear incisions, particularly if the first and second incisions are not arranged collinearly, fibers and parts of the nonwoven layer are detached from the nonwoven fabric.Detachment of fibers and parts of the nonwoven layer, particularly at the common starting point of the first and second incisions, can result in a restriction in the functionality of the wound dressing. When using the known dressing, wound healing is impaired in many cases. Furthermore, it has been shown that fibers and parts of the nonwoven layer detached from the nonwoven fabric can penetrate the wound. The corresponding residue of nonwoven material in the wound can impair wound healing. The wound healing process is therefore impaired in many cases, despite tension relief in the dressing.

[005] A wound care article according to document DE 10 2011 002 268 A1 comprises a nonwoven material or Airlaid material having a pattern of incisions and / or perforations to increase fluid entry into the wound care article. According to document DE 10 2011 002 268 A1, fluid entry into the wound care article is increased by incisions. Petition 870260008103, dated 01 / 28 / 2026, p. 16 / 82 3 / 24 and / or appropriate perforations. However, it has been found that increased fluid ingress and corresponding incisions or punctures can cause the wound care article to separate from the wound, shortening the lifespan of the wound care article. Furthermore, it has been found that when the wound care article is used on areas of the body where high shear stress acts on the article, for example, bending a knee or elbow, the functionality of the article may be limited by partial detachment from the wound. Additionally, it has been observed in many cases that appropriate incisions and / or perforations, which remove material from the nonwoven material, lead to disintegration of the wound care article, thus reducing its absorption capacity and functionality.Despite a greater inflow of fluid into the absorbent material of the wound care product, the wound healing process may therefore be impaired and the user's comfort reduced.

[006] Taking into account these problems of the state of the art, the invention is based on the objective of providing a wound dressing that allows for better wound healing.

[007] According to the invention, this objective is achieved through a development of known wound dressings, which is essentially characterized in that the nonwoven fabric of the wound dressing has at least one arc-shaped incision with a radius of curvature in a range of 0.5 mm to 20 mm, and the tangent applied to the arc-shaped incision has an angle of 30° to 150°, preferably 45° to 135°, more preferably 60° to 120° relative to the machine direction of the nonwoven fabric. The flat extent of the dressing includes the machine direction and a direction orthogonal to it, the fibers of the nonwoven fabric having a preferred direction along the Petition 870260008103, dated 01 / 28 / 2026, page 17 / 82 4 / 24 machine direction, that is, most of the nonwoven fibers are aligned in the direction of the nonwoven machine.

[008] This invention is based on the observation that wound healing with known wound dressings is inadequate, despite tension relief through incisions or perforations. It has been demonstrated that arc-shaped incisions with a radius of curvature in the range of 0.5 mm to 20 mm, and a tangent applied to the arc-shaped incision, which has an angle of 30° to 150°, preferably 45° to 135°, more preferably 60° to 120° relative to the nonwoven machine direction, achieve better wound healing results. Surprisingly, it has been demonstrated that a particularly large number of fibers can be cut in the machine direction of a nonwoven using arc-shaped incisions, which can provide excellent tension relief and elasticity of the nonwoven. Furthermore, the absorption of the dressing is maintained by means of curved incisions and nonwoven material residues in the wound are avoided.The wound healing process is thus ideally promoted with a wound dressing according to the invention. In the context of the present invention, incisions are incisions in a material, for example in non-woven fabric, without the material being removed because, unlike punctures, incisions do not completely encircle an area of ​​the non-woven fabric. Incisions have the advantage of not causing disintegration of the material, for example of non-woven fabric. Punctures in which non-woven material is removed, such as circular punctures, have the disadvantage that the non-woven fabric may disintegrate and the absorption capacity of the corresponding dressings may be reduced. It has been found that incisions in which essentially no material is removed from the non-woven fabric are particularly useful for wound treatment because the non-woven fabric remains intact, thus ensuring good absorption. Preferably, a... Petition 870260008103, dated 01 / 28 / 2026, p. 18 / 82 5 / 24 The maximum distance between opposite sides of the arc-shaped incision running along the longest extent of the arc-shaped incision, or the width of the incision, is < 1 mm. This maximum distance refers specifically to a condition where the dressing is not attached to the wound.

[009] Within the scope of the invention, it has proven particularly favorable with respect to the extensibility of the nonwoven fabric in the machine direction if at least one arc-shaped incision in the nonwoven fabric, preferably each arc-shaped incision of a plurality of arc-shaped incisions in the nonwoven fabric, has a radius of curvature in an area of ​​1 mm to 17 mm, preferably 2 mm to 15 mm, more preferably 3 mm to 10 mm. A greater curvature of the arc-shaped incisions has the advantage that the arc-shaped incisions can be arranged in the dressing in such a way that adjacent arc-shaped incisions are as close as possible to each other. The arrangement of adjacent arc-shaped incisions with small spacing allows many of the machine-direction fibers to be cut by the adjacent arc-shaped incisions, thus providing greater conformity in the machine direction.If the nonwoven fabric comprises more than one arc-shaped incision, the arc-shaped incisions in the nonwoven fabric are spaced apart from each other.

[0010] In a preferred embodiment of the invention, the wound dressing is characterized by at least one arc-shaped incision in the nonwoven fabric having a length in the range of 1 mm to 15 mm, preferably 2 mm to 10 mm. All arc-shaped incisions in the nonwoven fabric preferably have a length in the range of 1 mm to 15 mm, preferably 2 mm to 10 mm. Such a length of at least one arc-shaped incision has the advantage that, when cutting the fibers along the length of the incision Petition 870260008103, dated 01 / 28 / 2026, page 19 / 82 6 / 24 arc-shaped incisions increase the extensibility of the nonwoven dressing towards the machine, while still maintaining high structural integrity. The nonwoven fabric preferably has multiple arc-shaped incisions with lengths ranging from 1 mm to 15 mm, ideally from 2 mm to 10 mm.

[0011] With regard to the structural integrity of the nonwoven fabric and the prevention of discontinuities, it has proven convenient that a length between a first endpoint of the arc-shaped incision and a second endpoint of the arc-shaped incision be in the range of 0.5 mm to 12 mm, preferably 1 mm to 9 mm. It has been shown that by avoiding discontinuities, the shedding of fibers or parts of the nonwoven layer that impairs wound healing can be avoided.

[0012] A straight line passing through the first endpoint of the arc-shaped incision and the second endpoint of the arc-shaped incision may have an angle of 30° to 150°, preferably 45° to 135°, more preferably 60° to 120° relative to the direction of the nonwoven machine. This has the advantage that the arc-shaped incision cuts a plurality of nonwoven fibers orthogonally to the fiber orientation, thus improving the extensibility of the nonwoven in the machine direction.

[0013] In terms of manufacturing technology and in terms of improved extensibility of the nonwoven fabric, it has proven advantageous if the arc-shaped incision in the nonwoven fabric is mirror-symmetric with respect to a plane perpendicular to a flat extension of the wound dressing and / or twice rotationally symmetric with respect to an axis perpendicular to the flat extension of the dressing. The nonwoven fabric preferably has a plurality of such mirror-symmetric and / or rotationally symmetric double arc-shaped incisions. Mirror-symmetric and / or rotationally symmetric double arc-shaped incisions Petition 870260008103, dated 01 / 28 / 2026, p. 20 / 82 7 / 24 incisions may be present, for example, in the form of a circular segment arc, an S-shape, or a wave shape. If the arc-shaped incision is designed with two rotational symmetries, the arc-shaped incision will be mapped onto itself by rotating it 18°.

[0014] As mentioned above, the arc-shaped incision can be conceived as an arc-shaped incision in the form of a segment of a circle, an S-shaped incision, or a wave-shaped incision. With regard to wound dressing production, it has proven convenient that all arc-shaped incisions in a plurality of arc-shaped incisions have an identical shape. The arc-shaped incisions of the plurality of arc-shaped incisions may have a different spatial orientation along the planar extent of the non-woven fabric, in particular along the machine direction and / or the direction orthogonal to the machine direction, and may be converted into one another by symmetry operations, for example mirroring, parallel offset and / or rotation. For example, the individual arc-shaped incisions of a plurality of arc-shaped incisions may have the same shape but are mirrored, parallel offset and / or rotated relative to each other.

[0015] In a particularly preferred embodiment of the invention, the nonwoven fabric has a plurality of arc-shaped incisions that are spaced apart from each other. By having a plurality of arc-shaped incisions in the nonwoven fabric, many fibers in the machine direction are cut and the extensibility of the nonwoven fabric in the machine direction is increased, allowing the dressing to better adapt to the user's body. Surprisingly, it has been found that the functionality of a wound dressing according to the invention with a large number of arc-shaped incisions is guaranteed even when used on body parts where high cistern tension is present. Petition 870260008103, dated 01 / 28 / 2026, p. 21 / 82 8 / 24 shearing acts on the wound dressing, since the arc-shaped incisions allow for ideal adaptation to the corresponding parts of the body. The arc-shaped incisions in the dressing according to the invention advantageously increase the user's comfort by reducing mechanical stress on the wound and, at the same time, preventing non-woven residue in the wound.

[0016] In order to achieve particularly advantageous machine-direction stretchability of the nonwoven fabric, it has proven advantageous if at least two spaced arc-shaped incisions of the plurality of arc-shaped incisions have a distance in the range of 0.5 mm to 10 mm, preferably 1 mm to 5 mm. This distance refers to the minimum distance between two points located on the respective two spaced arc-shaped incisions, i.e., between a first point located on a first arc-shaped incision and a second point located on a second incision spaced from the first arc-shaped incision. By adequately spacing adjacent arc-shaped incisions, a high proportion of the nonwoven fibers, in particular a high proportion of the machine-direction aligned fibers of the nonwoven fabric, is cut, so that the wound dressing has excellent machine-direction elasticity and discontinuity points are avoided.Preferably, most of the arc-shaped incisions in the plurality of arc-shaped incisions in the non-woven fabric, particularly preferably all the arc-shaped incisions in the plurality of arc-shaped incisions in the non-woven fabric, have a distance from their respective adjacent arc-shaped incisions in a range of 0.5 mm to 10 mm, preferably 1 mm to 5 mm.

[0017] In terms of elasticity and avoiding discontinuities, it has proven convenient that at least two spaced arc-shaped incisions be made out of a plurality of arc-shaped incisions along Petition 870260008103, dated 01 / 28 / 2026, p. 22 / 82 9 / 24 of the nonwoven fabric's machine direction should have a distance in a range of 0.5 mm to 10 mm, preferably 1 mm to 5 mm. Such a distance between two adjacent arc-shaped incisions along the nonwoven fabric's machine direction allows for particularly advantageous extensibility of the wound dressing, since most of the fibers, which are arranged in the nonwoven fabric's machine direction and reduce the extensibility of the nonwoven fabric in the machine direction, are present in a sheared state. This distance along the machine direction refers to the minimum distance between two points located on the respective two arc-shaped incisions spaced along the nonwoven fabric's machine direction.Preferably, most of the arc-shaped incisions of the plurality of arc-shaped incisions of the nonwoven fabric, particularly preferably all the arc-shaped incisions of the plurality of arc-shaped incisions of the nonwoven fabric, have a distance from their respective adjacent arc-shaped incisions along the machine direction of the nonwoven fabric in a range of 0.5 mm to 10 mm, preferably 1 mm to 5 mm. Adjacent arc-shaped incisions are those incisions that are adjacent to each other in the machine direction or transversely to the machine direction, i.e., in the direction orthogonal to the machine direction of the nonwoven fabric, in particular directly adjacent to each other, without incisions arranged between them.

[0018] Additionally or alternatively, at least two spaced arc-shaped incisions of the nonwoven fabric along a direction orthogonal to the machine direction may be spaced in a range of 0.5 mm to 10 mm, preferably 1 mm to 5 mm. This allows for particularly good elasticity of the nonwoven fabric along a direction of the dressing surface extension that runs orthogonally to the nonwoven fabric machine direction. Such a distance along an orthogonal direction Petition 870260008103, dated 01 / 28 / 2026, p. 23 / 82 10 / 24 orthogonal to the machine direction refers to the minimum distance between two points located on the respective two arc-shaped incisions spaced along the orthogonal direction, that is, along the flat extent of the dressing in the direction orthogonal to the machine direction of the nonwoven fabric. Preferably, most of the arc-shaped incisions of the plurality of arc-shaped incisions of the nonwoven fabric, particularly preferably all the arc-shaped incisions of the plurality of arc-shaped incisions of the nonwoven fabric, have a distance in a range of 0.5 mm to 10 mm from their respective adjacent arc-shaped incisions along the direction orthogonal to the machine direction, preferably 1 mm to 5 mm.

[0019] A wound dressing according to the invention is particularly extensible if the arc-shaped incisions of the plurality of arc-shaped incisions in the nonwoven fabric are at a distance from their respective adjacent incisions in the machine direction along the machine direction of the nonwoven fabric in a range of 0.5 mm to 10 mm, preferably 1 mm to 5 mm, and to their respective adjacent incisions in the direction orthogonal to the machine direction of the nonwoven fabric along the orthogonal direction have a distance in the range of 0.5 mm to 10 mm, preferably 1 mm to 5 mm.

[0020] In a dressing according to the invention, the arc-shaped incisions can be designed so that at least two spaced arc-shaped incisions of the plurality of arc-shaped incisions have an overlap along the machine direction with a length in the range of 0.1 mm to 5 mm, preferably 0.2 mm to 2 mm. Such overlapping of incisions along the machine direction results in most of the machine-oriented fibers, preferably all of the machine-oriented fibers, being cut at least once, thus increasing the extensibility of the wound dressing. Petition 870260008103, dated 01 / 28 / 2026, page 24 / 82 11 / 24

[0021] The arc-shaped incisions of a dressing according to the invention may also be designed so that at least two spaced arc-shaped incisions of the plurality of arc-shaped incisions overlap in length in the range of 0.1 mm to 5 mm along the direction orthogonal to the machine direction, preferably 0.2 mm to 2 mm. Such overlapping of incisions along the direction orthogonal to the machine direction results in most of the fibers oriented in the machine direction, preferably all the fibers oriented in the machine direction, being cut at least once in the direction orthogonal to the machine direction, which increases the elasticity of the dressing.A particularly high extensibility of the wound dressing can be achieved if the arc-shaped incisions are made so that at least two spaced arc-shaped incisions overlap in the machine direction and at least two spaced arc-shaped incisions overlap in the direction orthogonal to the machine direction. The wound dressing can, for example, be designed so that the wound dressing has a pattern of a plurality of spaced incisions, with at least two adjacent incisions of the pattern along the machine direction overlapping and at least two adjacent incisions of the pattern along the direction orthogonal to the machine direction overlapping.To achieve particularly high extensibility of the wound dressing, such a pattern can, for example, be designed in such a way that a plurality of incisions, preferably each incision of a plurality of incisions, overlaps in the machine direction and / or overlaps in the direction orthogonal to the machine direction with at least one adjacent incision.

[0022] As explained above, several arc-shaped incisions from the plurality of arc-shaped incisions in the non-woven fabric can Petition 870260008103, dated 01 / 28 / 2026, p. 25 / 82 12 / 24 have an identical shape. Preferably, at least two spaced arc-shaped incisions from the plurality of arc-shaped incisions, preferably all spaced arc-shaped incisions from the plurality of arc-shaped incisions, have an identical shape, for example, a circular segment arc shape, S shape or wave shape. These can be arranged so that the spaced arc-shaped incisions form a pattern of incisions in the non-tissue. In a preferred embodiment, the dressing has a plurality of incisions that have an identical shape, wherein the incisions adjacent along the direction of the nonwoven fabric machine have a distance in a range of 0.5 mm to 10 mm, preferably 1 mm to 5 mm, and wherein along the direction of the flat extension of the dressing running orthogonally to the direction of the adjacent machine the incisions along the orthogonal direction have a distance in a range of 0.5 mm to 10 mm, preferably 1 mm to 5 mm.

[0023] In a wound dressing according to the invention, the nonwoven fabric may have a border area and a central area, the border area and / or the central area having a plurality of arc-shaped incisions. Depending on the application, it has proven particularly advantageous if only the border area, only the central area, or both the border area and the central area have arc-shaped incisions. For use on areas of the body where high shear stress acts on the dressing, for example knees or elbows, it may be particularly beneficial for user comfort if the incisions are located in both the border area and the central area. This allows the user to bend their knee or elbow without causing unpleasant mechanical stress to the wound or without the dressing coming loose.In other applications, for example, smaller body parts where different mechanical loads occur, such as toes, heels, and toes, it may be advantageous to treat only the edge area or just the area. Petition 870260008103, dated 01 / 28 / 2026, p. 26 / 82 13 / 24 central has arc-shaped incisions, for example, to compensate for different mechanical loads at transitions between body parts, such as at the transition between the toes and the soles of the feet.

[0024] In a preferred embodiment, the arc-shaped incisions of the plurality of arc-shaped incisions are evenly distributed over the nonwoven fabric. In the case of a nonwoven fabric with evenly distributed incisions, at least 25%, preferably 50%, more preferably 75% of the incisions of the plurality of arc-shaped incisions are designed in such a way that the distance between adjacent incisions is approximately the same and / or that the incisions can be converted into one another by symmetry operations. A symmetry operation may include a reflection, a parallel translation and / or a rotation. For example, a plurality of evenly distributed incisions has an approximately equal distance from its respective adjacent incisions along the machine direction and / or along the direction orthogonal to the machine direction, for example a distance in the range of 0.5 mm to 10 mm, preferably 1 mm to 5 mm.The nonwoven fabric can be designed in such a way that there is a uniform distribution of arc-shaped incisions in the border area, in the central area, or throughout the nonwoven fabric, both in the border area and in the central area. The arc-shaped incisions can, for example, be uniformly distributed over the border area and the central area. A uniform distribution of the arc-shaped incisions allows the wound dressing to have uniform elasticity, making the wound dressing particularly suitable for areas of the body where high shear stress acts on the wound dressing. The wound dressing according to the invention comprises the dressing and optionally other layers and / or materials, for example an adhesive film. In one embodiment, the dressing consists of the nonwoven fabric comprising fibers. Petition 870260008103, dated 01 / 28 / 2026, page 27 / 82 14 / 24

[0025] In a preferred embodiment, the nonwoven fabric comprises a superabsorbent polymer. A nonwoven fabric with a superabsorbent polymer has the advantage that the osmotic potential of the superabsorbent polymer increases the absorption of wound fluid in the wound dressing. Superabsorbent polymers are plastics capable of absorbing liquids many times greater than their own weight, for example, up to 1000 times their own weight. Superabsorbent polymers can be, for example, copolymers of acrylic acid and sodium acrylate, where the ratio of the two monomers to each other can vary. In addition, a central crosslinker (CXL) can be added to the monomer solution, which connects the long-chain polymer molecules formed to each other at locations using chemical bridges. These bridges make the polymer insoluble in water.

[0026] In a preferred embodiment, the superabsorbent polymer is particulate and / or fibrous. A particulate superabsorbent polymer may, for example, be in the form of granules and / or powder. It has proved convenient for the particulate superabsorbent polymer to have a particle size in the range of 1 µm to 1,000 µm, preferably between 100 µm and 1,000 µm. A fibrous superabsorbent polymer may be present, for example, in the form of one or more fibers, a knitted fiber fabric, a fiber fabric, a fiber nonwoven and / or a fiber filling. The particulate form, for example granulated or powdered, of a superabsorbent polymer has proved to be very useful and is therefore particularly preferred because it can be easily incorporated into a nonwoven. Similarly, the fiber form of a superabsorbent polymer is particularly preferred because it is a very soft product in both the dry and swollen states, can be molded, and has low abrasiveness.

[0027] The invention further relates to a wound dressing comprising a wound dressing according to the invention. A Petition 870260008103, dated 01 / 28 / 2026, p. 28 / 82 A wound dressing according to the invention is prepared for use in the treatment of wounds and allows for easy application by the user. A wound dressing according to the invention is preferably a sterile wound dressing.

[0028] In a preferred embodiment, the wound dressing comprises a backing layer, a superabsorbent layer, a layer comprising polyurethane and / or a wound contact layer. The backing layer promotes the stability of the dressing and protects against the penetration of substances such as dirt, water and bacteria from the outside into the dressing. The backing layer offers particularly good protection if the backing layer is waterproof. The superabsorbent layer increases the absorption of wound fluid and is particularly preferred for use in wound dressings that are prepared for wounds with moderate to heavy exudate. The superabsorbent layer may be the nonwoven fabric of the dressing comprising a superabsorbent polymer and / or may be an additional layer of the dressing comprising a superabsorbent material, for example, a superabsorbent polymer.A wound dressing according to the invention may, for example, have a superabsorbent layer, which is designed in the form of the nonwoven dressing with a superabsorbent polymer or in the form of a separate superabsorbent layer of the nonwoven dressing, or the wound dressing may have two superabsorbent layers, wherein a first superabsorbent layer is the nonwoven dressing with a superabsorbent polymer and a second superabsorbent layer is an additional superabsorbent layer. A superabsorbent layer may, for example, comprise an absorbent material, such as cellulose fibers, in which a superabsorbent polymer, for example, a sodium acrylate-acrylic acid polymer, is incorporated. In order to ensure high absorption of the superabsorbent layer(s), a. Petition 870260008103, dated 01 / 28 / 2026, page 29 / 82 16 / 24 The superabsorbent layer may have superabsorbent polymers with a weight percentage of >15% to <99%, based on the total weight of the superabsorbent layer. A superabsorbent layer may be placed in a wound dressing, for example, between a support layer and the nonwoven fabric. The superabsorbent layer(s) may comprise a superabsorbent polymer, thus ensuring good exudate absorption. In terms of manufacturing technology, it has proven advantageous if a superabsorbent polymer of one or more superabsorbent layers is designed in particle and / or fibrous form, as this ensures excellent incorporation of the superabsorbent material into the wound dressing. A particular advantage of fibrous superabsorbent polymers is that a high structural integrity of the superabsorbent layer(s) is achieved, in which the superabsorbent polymer does not dissolve into the superabsorbent layer.The polyurethane-based layer promotes excellent exudate management and provides an ideal environment for wound healing. Regarding good drainage of wound fluid and reduced risk of maceration, it has proven particularly advantageous if the polyurethane-based layer comprises polyurethane foam. A wound dressing according to the invention can, for example, be prepared in such a way that a polyurethane-based layer is disposed between a wound contact layer and the nonwoven fabric of the wound dressing. The wound contact layer increases user comfort. For example, the wound contact layer minimizes patient pain during application and reduces trauma to the wound and surrounding tissues during dressing changes.It has been found that a wound contact layer comprising silicone is particularly suitable in terms of reducing patient pain and tissue trauma during dressing changes. Petition 870260008103, dated 01 / 28 / 2026, p. 30 / 82 17 / 24 wound.

[0029] Within the scope of the invention, it is also provided that the superabsorbent layer, the layer comprising polyurethane and / or the wound contact layer comprise at least one arc-shaped incision, preferably a plurality of arc-shaped incisions. Preferably, at least one arc-shaped incision has the superabsorbent layer, the layer comprising polyurethane and / or the wound contact layer, if present, approximately the same properties as at least one incision in the nonwoven fabric, for example with respect to the radius of curvature, incision length, orientation along the machine direction, symmetry, shape, spacing and distribution. It has been shown to be desirable that a pattern formed from the arc-shaped incisions in the superabsorbent layer, the layer comprising polyurethane and / or the wound contact layer be identical to the pattern formed from the arc-shaped incisions in the nonwoven fabric.If more than one layer of the superabsorbent layer, the layer comprising polyurethane, and the wound contact layer has arc-shaped incisions, these layers will preferably have an identical incision pattern. For example, such an incision pattern can be created by first arranging several layers of the wound dressing, for example a superabsorbent layer, the nonwoven fabric, and a layer comprising polyurethane, one on top of the other, and then cutting at least one arc-shaped incision, whereby the layers arranged one on top of the other each have at least one arc-shaped incision. It has been found that, with regard to the elasticity of the wound dressing, it is particularly advantageous if not only the nonwoven fabric has at least one arc-shaped incision, but also at least one additional layer, for example, the superabsorbent layer and / or the layer comprising polyurethane. Petition 870260008103, dated 01 / 28 / 2026, p. 31 / 82 18 / 24 has an arc-shaped incision. According to one embodiment, if the wound contact layer has an elastic material, for example, silicone, the wound contact layer is designed without arc-shaped incisions.

[0030] A wound dressing according to the invention may also have one or more removable protective films that can be removed from the wound contact layer to facilitate application of the wound dressing. Furthermore, the shape of the wound dressing may be designed in such a way that the shape is adapted to the anatomical requirements of the body part for which the wound dressing is being prepared. A wound dressing may, for example, be designed in the shape of a square, rectangle, circle, or oval. For the treatment of wounds in difficult locations, such as the sacral area, the elbow, or the heel, the shape of the dressing may be specifically adapted to the corresponding body part.

[0031] The invention also relates to a wound treatment kit with a dressing according to the invention stored sterilely in a package. Instructions for using the dressing in wound treatment are preferably provided with and / or inside the package. The wound treatment kit according to the invention allows the dressing to be applied to a wound easily and safely.

[0032] As can be seen from the above explanation of wound dressings and wound dressings according to the invention, the invention also relates to the use of a wound dressing according to the invention to produce a wound dressing according to the invention. For this purpose, the wound dressing can be prepared as a wound dressing, for example, by assembling the wound dressing with other layers, such as a superabsorbent layer, a layer comprising polyurethane and / or a Petition 870260008103, dated 01 / 28 / 2026, p. 32 / 82 19 / 24 layer in contact with the wound.

[0033] The invention also relates to a wound dressing according to the invention, a wound bandage according to the invention and / or a wound treatment kit according to the invention for use in wound treatment. It has been found that excellent wound treatment can be ensured if the non-woven fabric of a dressing is made with curved incisions, which significantly improves patient comfort.

[0034] The invention is explained below with reference to the drawing, to which express reference is made in relation to all details essential to the invention and not further highlighted in the description, where in the drawing:

[0035] Figure 1 shows a wound dressing 1 and a wound bandage 9 according to a first embodiment of the invention,

[0036] Figure 2 shows a wound dressing 1 and a wound bandage 9 according to a second embodiment of the invention,

[0037] Figure 3 shows a wound dressing 1 and a wound bandage 9 according to a third embodiment of the invention,

[0038] Figure 4 shows schematic sketches of arc-shaped incisions 3, and

[0039] Figure 5 shows schematic sketches of a large number of arc-shaped incisions 3.

[0040] Figure 1A shows a dressing 1 according to a first embodiment of the invention. The dressing 1 comprises a nonwoven fabric 2 with a plurality of arc-shaped incisions 3. The incisions 3 are, for example, S-shaped. The incisions 3 of the plurality of arc-shaped incisions 3 are evenly distributed over Petition 870260008103, dated 01 / 28 / 2026, p. 33 / 82 20 / 24 the nonwoven fabric 2. The flat extent of the dressing includes a machine direction MR and a direction orthogonal to it OR. The fibers of the nonwoven fabric 2 have a preferred direction along the machine direction MR, that is, most of the fibers of the nonwoven fabric 2 are aligned along the machine direction MR. The arc-shaped incisions 3 cut the fibers that reduce extensibility along the machine direction MR, so that a dressing 1 according to the invention with arc-shaped incisions 3 exhibits excellent extensibility. The dressing 1 may be made of the nonwoven fabric 2 or comprise other materials and / or layers. Figure 1B shows a dressing 9, which comprises the nonwoven fabric 2 and further comprises a support layer 10, a superabsorbent layer 11, a layer 12 comprising polyurethane and a wound contact layer 13. The superabsorbent layer 11 is disposed between the support layer 10 and the nonwoven fabric 2.Dressing 1 consists of nonwoven fabric 2 and is placed between the superabsorbent layer 11 and the polyurethane layer 12. The polyurethane layer 12 is placed between the nonwoven fabric 2 and the wound contact layer 13. The superabsorbent layer 11 comprises a plurality of arc-shaped incisions 3. Preferably, a pattern formed by the arc-shaped incisions 3 of the superabsorbent layer 11 is identical to a pattern formed by the arc-shaped incisions 3 in the nonwoven fabric 2.

[0041] Figure 2A shows a dressing 1 according to a second embodiment of the invention. The dressing 1 comprises a nonwoven fabric 2 with a plurality of arc-shaped incisions 3 in an edge area 7 of the nonwoven fabric 2. The incisions 3 are, for example, drawn in the form of a segment of a circle. For example, a central area 8 of the nonwoven fabric 2 does not have any arc-shaped incisions 3. The incisions 3 of the plurality of arc-shaped incisions 3 are evenly distributed over the edge area 7 of the nonwoven fabric. Petition 870260008103, dated 01 / 28 / 2026, page 34 / 82 21 / 24 2. Dressing 1 may consist of nonwoven fabric 2 or comprise other materials and / or layers. Figure 2B shows a dressing 9, which has a nonwoven fabric 2 and further comprises a support layer 10, a superabsorbent layer 11, a layer 12 comprising polyurethane, and a wound contact layer 13. The superabsorbent layer 11 is located between the support layer 10 and the nonwoven fabric 2. Dressing 1 consists of nonwoven fabric 2 and is located between the superabsorbent layer 11 and the polyurethane layer 12. Layer 12 comprising polyurethane is disposed between the nonwoven fabric 2 and the wound contact layer 13. The superabsorbent layer 11 comprises a plurality of arc-shaped incisions 3. Preferably, a pattern formed by the arc-shaped incisions 3 of the superabsorbent layer 11 is identical to a pattern formed by the arc-shaped incisions 3 in the nonwoven fabric 2.

[0042] Figure 3A shows a wound dressing 1 according to a third embodiment of the invention. The wound dressing 1 comprises a nonwoven fabric 2 with a plurality of arc-shaped incisions 3 in a central area 8 of the nonwoven fabric 2. The incisions 3 are, for example, S-shaped. For example, an edge area 7 of the nonwoven fabric 2 does not have any arc-shaped incisions 3. The incisions 3 of the plurality of arc-shaped incisions 3 are evenly distributed over the central area 8 of the nonwoven fabric 2. Figure 3B shows a wound bandage 9, which has a nonwoven fabric 2 and further comprises a backing layer 10, a layer 12 comprising polyurethane and a wound contact layer 13. The dressing 1 consists of the nonwoven fabric 2 and is disposed between the backing layer 10 and the layer 12 comprising polyurethane. Layer 12, comprising polyurethane, is placed between nonwoven fabric layer 2 and wound contact layer 13.

[0043] Figure 4A shows an example of two shaped incisions. Petition 870260008103, dated 01 / 28 / 2026, page 35 / 82 22 / 24 spaced arc incisions 3A, 3B of a plurality of arc-shaped incisions 3, not shown. The arc-shaped incisions 3A, 3B are spaced along the direction of the MR machine and along the OR direction orthogonal to the direction of the MR machine along the flat extent of dressing 1. A length L4 of a distance between two spaced arc-shaped incisions 3A, 3B along the direction of the MR machine is a minimum length between a point located on the first incision 3A and a point located on the second incision 3B. The arc-shaped incisions 3 are designed so that the two spaced arc-shaped incisions 3A, 3B overlap by a length L3 along the direction of the MR machine, for example, in a range of 0.1 mm to 5 mm, preferably 0.2 mm to 2 mm.A length L5 of a distance between two arc-shaped incisions spaced 3A, 3B along the direction orthogonal to the machine direction OR is a minimum length between a point located on the first incision 3A and a point on the second incision point 3B along the orthogonal direction OR. Figure 4B shows an exemplary arc-shaped incision 3 having a length L1 along the incision. A length L2 between a first endpoint 5 of the arc-shaped incision 3 and a second endpoint 6 of the arc-shaped incision 3 is preferably in the range of 0.5 mm to 12 mm, preferably 1 mm to 9 mm. A straight line passing through the first endpoint 5 of the arc-shaped incision 3 and the second endpoint 6 of the arc-shaped incision 3 has an angle of 30° to 150°, preferably 45° to 135°, more preferably 60° to 120° in relation to the direction of the MR nonwoven machine 2.

[0044] Figure 5A shows a plurality of arc-shaped incisions spaced 3, 3A, 3B. The tangents 4 applied to the arc-shaped incisions 3, 3A, 3B each have an angle of 30° to 150°, preferably 45° to 135°, more preferably 60° to 120° in relation to Petition 870260008103, dated 01 / 28 / 2026, p. 36 / 82 23 / 24 direction to the MR machine direction of nonwoven fabric 2. Figure 5B shows three exemplary incision patterns 3A, 3B formed by a plurality of incisions 3A, 3B spaced along the MR machine direction and along the OR direction orthogonal to the MR machine direction. Nonwoven fabric 2 and other layers of a wound dressing 9, for example, a support layer 10, a superabsorbent layer 11, a layer 12 comprising polyurethane and / or a wound contact layer 13, may have corresponding patterns.

[0045] The invention is not limited to the exemplary embodiments explained with reference to the drawings. Instead, embodiments are also provided in which arc-shaped incisions 3 with shapes different from those shown in Figure 1, for example, circular segment arc-shaped or wave-shaped incisions, are uniformly distributed over the entire surface of the nonwoven fabric 2, including the edge area 7 and the central area 8. In addition, embodiments are also contemplated in which arc-shaped incisions 3 with shapes different from those shown in Figure 2, for example, S-shaped or wave-shaped incisions, are distributed over the edge area 7 of the nonwoven fabric 2. Furthermore, embodiments are also contemplated in which arc-shaped incisions 3 with shapes different from those shown in Figure 3, for example, circular segment or wave-shaped incisions, are distributed over the central area 8 of the nonwoven fabric 2. List of Reference Numerals Wound dressing Nonwoven fabric Arc-shaped incision 3A, 3B Spaced arc-shaped incisions Tangent Petition 870260008103, dated 01 / 28 / 2026, page 37 / 82 24 / 24 First endpoint of the arc-shaped incision. Second endpoint of the arc-shaped incision. Border area Central area Wound bandage Support layer Superabsorbent layer Layer comprising polyurethane Wound contact layer MR Machine Steering OR Direction orthogonal to the machine's direction. L1 Length of the arc-shaped incision L2 Length between a first endpoint and a second endpoint of the arc-shaped incision L3 Length of an overlap along the machine direction L4 Length of a distance along the direction of the machine L5 Length of a distance along the direction orthogonal to the direction of the machine. Petition 870260008103, dated 01 / 28 / 2026, page 38 / 82

Claims

1 / 5 CLAIMS 1. Wound dressing (1) with a nonwoven fabric (2) comprising fibers, most of the fibers being aligned in a machine direction (MR) of the nonwoven fabric (2), the nonwoven fabric (2) having at least one incision (3), characterized in that the incision (3) is an arc-shaped incision (3) with a radius of curvature in the range of 3 mm to 10 mm, and a tangent (4) applied to the arc-shaped incision (3) has an angle of 30° to 150°, preferably 45° to 135°, more preferably 60° to 120° relative to the machine direction (MR) of the nonwoven fabric (2), wherein the arc-shaped incision (3) is designed as an S-shaped incision or wave-shaped incision, the nonwoven fabric (2) having a plurality of arc-shaped incisions (3) that are spaced apart from each other.

2. Wound dressing (1) according to claim 1, characterized in that the arc-shaped incision (3) has a length (L1) in the range of 1 mm to 15 mm, preferably 2 mm to 10 mm.

3. Wound dressing (1), according to claim 1 or 2, characterized in that a length (L2) between a first endpoint (5) of the arc-shaped incision (3) and a second endpoint (6) of the arc-shaped incision (3) is in a range of 0.5 mm to 12 mm, preferably from 1 mm to 9 mm.

4. Wound dressing (1), according to any one of claims 1 to 3, characterized in that a straight line passing through the first endpoint (5) of the arc-shaped incision (3) and the second endpoint (6) of the arc-shaped incision (3) has an angle of 30° to 150°, preferably 45° to 135°, more preferably 60° to 120° in relation to the direction of the non-woven machine (MR) (2).

5. Wound dressing (1), according to any one of claims 1 to 4, characterized in that at least two adjacent arc-shaped incisions (3A, 3B) spaced apart from the plurality of arc-shaped incisions (3) have a distance in a range of 0.5 mm to 10 mm, preferably 1 mm to 5 mm.

6. Wound dressing (1), according to any one of claims 1 to 5, characterized in that at least two adjacent arc-shaped incisions (3A, 3B) spaced apart from the plurality of arc-shaped incisions (3) along the machine direction (MR) of the nonwoven fabric (2) are at a distance in a range of 0.5 mm to 10 mm, preferably 1 mm to 5 mm.

7. Wound dressing (1), according to any one of claims 1 to 6, characterized in that at least two adjacent arc-shaped incisions (3A, 3B) spaced apart from the plurality of arc-shaped incisions (3) along a direction (OR) orthogonal to the machine direction (MR) are at a distance in a range of 0.5 mm to 10 mm, preferably 1 mm to 5 mm.

8. Wound dressing (1), according to any one of claims 1 to 7, characterized in that at least two arc-shaped incisions (3A, 3B) spaced apart from the plurality of arc-shaped incisions (3) have an overlap in a length (L3) along the machine direction (MR) in a range of 0.1 mm to 5 mm, preferably 0.2 mm to 2 mm.

9. Wound dressing (1), according to any one of claims 1 to 8, characterized in that at least two arc-shaped incisions (3A, 3B) spaced apart from the plurality of arc-shaped incisions (3) along the direction (OR) orthogonal to the machine direction (MR) have an overlap in a length (L6) in a range of 0.1 mm to 5 mm, preferably 0.2 mm to 2 mm. Petition 870260008103, dated 28 / 01 / 2026, p. 40 / 82 3 / 5 10. Wound dressing (1), according to any one of claims 1 to 9, characterized in that at least two spaced-out arc-shaped incisions (3A, 3B) of the plurality of arc-shaped incisions (3), preferably all spaced-out arc-shaped incisions (3) of the plurality of arc-shaped incisions (3), have an identical shape.

11. Wound dressing (1) according to any one of claims 1 to 10, characterized in that the nonwoven fabric (2) has a border area (7) and a central area (8), wherein the border area (7) and / or the central area (8) has a large number of arc-shaped incisions (3).

12. Wound dressing (1) according to any one of claims 1 to 11, characterized in that the arc-shaped incisions (3) of the plurality of arc-shaped incisions (3) are evenly distributed over the non-woven fabric (2).

13. Wound dressing (1), according to any one of claims 1 to 12, characterized in that the nonwoven fabric (2) comprises a superabsorbent polymer.

14. Wound dressing (1), according to claim 13, characterized in that the superabsorbent polymer is particulate and / or fibrous.

15. Wound bandage (9), characterized in that it comprises a wound dressing (1) as defined in any one of claims 1 to 4.

16. Wound bandage (9), according to claim 15, characterized in that the wound bandage (9) comprises a support layer (10), a superabsorbent layer (11), a layer (12) comprising polyurethane and / or a wound contact layer (13).

17. Wound bandage (9), according to claim 16, characterized in that the backing layer (10) is waterproof.

18. Wound bandage (9), according to claim 16 or 17, characterized in that the superabsorbent layer (11) comprises a superabsorbent polymer.

19. Wound bandage (9), according to any one of claims 16 to 18, characterized in that the layer (12) comprising polyurethane comprises polyurethane foam.

20. Wound bandage (9), according to any one of claims 16 to 19, characterized in that the wound contact layer (13) comprises silicone.

21. Wound bandage (9), according to any one of claims 16 to 20, characterized in that the superabsorbent layer (11), the layer comprising polyurethane (12) and / or the wound contact layer (13) have at least one arc-shaped incision (3), preferably a plurality of arc-shaped incisions (3).

22. Wound treatment kit with dressing, characterized in that it has a wound bandage (9) as defined in any one of claims 15 to 21, housed in a package.

23. Wound treatment kit, according to claim 22, characterized in that instructions for use of the wound dressing (1) in wound treatment are provided together with and / or inside the packaging.

24. Use of a wound dressing (1), as defined in any one of claims 1 to 14, characterized in that it is for the production of a wound bandage (9).

25. Wound dressing (1), according to any of claims 1 to 14, characterized in that it is for use in the treatment of wounds.

26. Wound bandage (9) according to any one of claims 15 to 21, characterized in that it is for use in the treatment of wounds.

27. Wound treatment kit, according to claim 22 or 23, characterized in that it is for use in the treatment of wounds. Petition 870260008103, dated 01 / 28 / 2026, pp. 43 / 82

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