Covering material containing first and second release liners

Abstract

To improve a field of a thin adhesive covering material and enable deposition of such a covering material in a sterilized state without wrinkles.SOLUTION: The present disclosure relates to a covering material (100) containing a backing layer (101), an adhesive skin-contact layer (102) and a first release liner (103). The adhesive skin-contact layer (102) is in a form including a central portion (102a) and an edge portion (102b) surrounding the central portion (102a). The first release liner (103) is formed to be releasably attached to at least the central portion (102a) of the adhesive skin-contact layer (102). The covering material (100) comprises a second release liner (104) disposed between the first release liner (103) and at least a part of the edge portion (102b) of the adhesive skin-contact layer (102).SELECTED DRAWING: Figure 2A

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates generally to a dressing that includes a first release liner and a second release liner, and a method for making such a dressing. [Background technology]

[0002] Adhesive dressings are often used in wound care, both to treat wounds and scars and to prevent wounds from occurring in the first place.

[0003] Various types of dressings exist on the market. Some dressings, commonly referred to as "film dressings," include a backing layer and an adhesive skin-contacting layer. So-called "bordered dressings" are also frequently used, and these dressings include an absorbent pad disposed between the backing layer and the adhesive skin-contacting layer. In bordered dressings, the backing layer and the adhesive skin-contacting layer are configured to extend beyond the periphery of the absorbent pad.

[0004] The purpose of the adhesive skin contact layer is to adhere to the wearer's skin or wound and secure the dressing in the desired position. The desired properties of the adhesive skin contact layer when used in a dressing are that it should be thin and flexible so that it can conform to the contours of the skin, regardless of whether the dressing is a film or a border type.

[0005] While thinness and adhesiveness (at least at the borders) of film-type and border-type dressings are desirable, these attributes typically make the dressings difficult to handle and apply to a patient. The dressings are not self-supporting and can wrinkle or stick to themselves during application. The wrinkles that form create thin channels through which fluids can leak. Thus, the dressing becomes useless and must ultimately be discarded.

[0006] To facilitate handling of thin adhesive dressings, a release liner can be attached to the adhesive skin contact layer. However, once the release liner is removed, the adhesive layer can still wrinkle and stick to itself. Furthermore, once the release liner is removed, the edges of the adhesive skin contact layer (and dressing) tend to curl.

[0007] Thin, adhesive dressings are often applied after surgery and should initially be sterile in medical applications. Sterile application of dressings is crucial to avoid the risk of wound infection. Users, such as clinicians, must often apply dressings under strict aseptic conditions, especially when the dressings are used in a surgical environment. It is important not to touch the surface of the dressing to avoid bacterial contamination.

[0008] Various attempts have been made to facilitate the handling and application of thin adhesive coverings. For example, U.S. Patent No. 5,929,999 discloses a composite structure including a cover, a stiffener, and a releasable liner. The stiffener and the releasable liner, which includes three laterally arranged sections, provide rigidity to the composite structure and prevent the covering from sticking to itself and forming wrinkles during application. The stiffener is releasably secured to the top surface of the cover and includes a handle that is more rigid than the main portion of the stiffener.

[0009] The adhesive surface of the polymer film dressing disclosed in Patent Document 2 is covered with a release paper liner formed of three laterally arranged sections. The central section is first positioned to be removed, and the dressing is then grasped by the two side sections and placed in the desired position. Finally, the side sections are removed to complete the fixation of the dressing to the wound.

[0010] The bordered dressing disclosed in Patent Document 3 includes a release liner releasably attached to an adhesive skin-contacting layer. The release liner includes at least two removable sections separated by a dividing line located less than 15 mm from the edge of the wound pad. The dressing can thus be precisely positioned at the edge of the wound.

[0011] Although the above documents provide a solution to the problems of handling thin film dressings or bordered dressings with thin borders, there is still room for improvement in this area.

[0012] Specifically, there is a need to improve and simplify the procedures for applying thin adhesive dressings to avoid, or at least significantly reduce, wrinkle formation while also preventing bacterial contamination during application. [Prior art documents] [Patent documents]

[0013] [Patent Document 1] US Patent Application Publication No. 2009 / 0105670 [Patent Document 2] U.S. Patent No. 4,614,183 [Patent Document 3] European Patent No. 3373874 [Patent Document 4] European Patent Application Publication No. 3023083 Summary of the Invention [Problem to be solved by the invention]

[0014] In light of the above-mentioned problems, it is an object of the present disclosure to provide improvements in the field of thin adhesive dressings and to enable wrinkle-free, sterile application of such dressings. [Means for solving the problem]

[0015] According to a first aspect of the present disclosure, there is provided a dressing comprising a backing layer, an adhesive skin contact layer, and a first release liner, wherein the adhesive skin contact layer comprises a central portion and an edge portion surrounding the central portion, the first release liner being configured to be releasably attached to at least the central portion of the adhesive skin contact layer, and the dressing comprising a second release liner disposed between the first release liner and at least a portion of the edge portion of the adhesive skin contact layer. [Effects of the Invention]

[0016] The present disclosure is based on the recognition that providing two removable release liners allows for smooth, wrinkle-free application of the dressing. The release liners are removed in stages, and a thin adhesive skin-contact layer is applied to the wearer's skin in at least two steps. In the first step, the first release liner is removed, and a central portion of the adhesive skin-contact layer is applied to the patient's skin, wound, or incision. The central portion is gently and precisely seated on the skin. If the dressing includes an absorbent pad, the area surrounding the pad edge may be smoothed, as this area is particularly prone to wrinkle formation.

[0017] In the next step, if the adhesive skin contact layer is already partially attached to the skin, the second release liner is removed from the edge portion of the adhesive skin contact layer, thereby attaching the peripheral edge of the dressing to the skin.

[0018] The wearer, e.g., a caregiver, can choose to completely remove the first release liner before securing the central portion of the adhesive skin contact layer (and dressing), or to gradually remove the first release liner while simultaneously positioning the uncovered adhesive skin contact layer against the skin and smoothing the central portion of the adhesive skin contact layer against the skin.

[0019] The second release liner is configured to be releasably attached to at least a portion of the edge portion of the adhesive skin contact layer.

[0020] The first release liner is configured to cover the adhesive skin-contact layer and the second release liner. This prevents unwanted contaminants from penetrating the dressing before application. The second release liner is configured to cover only the edges, i.e., the peripheral edges of the adhesive skin-contact layer (and dressing). The purpose of the second release liner is to prevent wrinkles from forming at the edges of the dressing. It is important that the edges be applied evenly and evenly to avoid wrinkles, as such wrinkles can form thin channels through which liquids can leak. The wear time of the dressing can thus be improved by the configuration of the first and second release liners. The second release liner also prevents the edges from "curling" when the first release liner is removed. Furthermore, the second release liner prevents the dressing from sticking to itself before application.

[0021] The dressings of the present disclosure can be used on all types of wounds, cuts, and even on intact skin (where the purpose of the dressing is to prevent the wound from occurring in the first place). The dressings are advantageously used on larger wounds or scars and may have a relatively large size. Larger dressings are typically more difficult to apply because they tend to stick to themselves and wrinkle easily, especially around the edges of the dressing. The dressings of the present disclosure are advantageously used on dressings that include a generally "flimsy" border. It should be noted, however, that the present disclosure also has some advantages for smaller dressings. For example, smaller edged dressings can suffer from the same problem of "curling" when the first release liner is removed.

[0022] In an embodiment, the second release liner is positioned to follow the contour of at least 70%, preferably at least 80%, of said edge portion of the adhesive skin contact layer.

[0023] Preferably, the second release liner is positioned to follow the contour of the entire edge of the adhesive skin contact layer.

[0024] The second release liner is thus disposed as a "frame" or at least a partial frame around the periphery of the adhesive skin contact layer.

[0025] Typically, the edge portion constitutes 0.3 to 30%, preferably 0.4 to 15%, of the surface area of ​​the adhesive skin contact layer.

[0026] The surface area of ​​the edge portion may vary depending on the size and shape of the dressing. If the dressing includes an absorbent pad contoured by a border portion, the surface area of ​​the edge portion may vary depending on the size of the border portion. For example, a larger border portion will require a larger edge portion to be covered by the second release liner, and vice versa.

[0027] In an embodiment, the second release liner includes a first tab that is configured to extend beyond the periphery of the adhesive skin contact layer and is positioned on a first edge of the edge portion of the adhesive skin contact layer.

[0028] The first tab of the second release liner can be used to aid in positioning the dressing on the skin. To gradually remove the first release liner, the wearer (e.g., a caregiver) can hold the first tab with one hand while using the other hand to remove the first release liner and simultaneously secure the central portion of the adhesive skin contact layer onto the skin, for example, over a scar on the skin. The fact that the first tab extends beyond the periphery of the adhesive skin contact layer allows the wearer (e.g., a caregiver) to hold the dressing by the outer region of the adhesive skin contact layer, thereby avoiding undesired interference with this layer that will come into contact with the wearer's skin.

[0029] The first tab can then be used to remove the second release liner, thereby securing the edges of the adhesive skin contact layer onto the skin in a substantially wrinkle-free manner.

[0030] Preferably, the second release liner includes a second tab that is formed to extend beyond the periphery of the adhesive skin contact layer and is positioned on a second edge of the edge portion of the adhesive skin contact layer opposite the first edge.

[0031] This allows the dressing to be held in a straight, stretched state during the initial application stage, thereby preventing the adhesive skin contact layer from adhering to itself during application. This also allows the wearer to select either the first or second tab to initiate removal of the second release liner. Furthermore, the dressing can be held in place at an area outside the surface of the dressing, i.e., the area outside the adhesive skin contact layer, thereby preventing unwanted disturbance of the portion of the dressing to be applied to the patient's skin or wound. The risk of bacterial contamination and unwanted intervention of the wound or skin site is thereby significantly reduced.

[0032] In an embodiment, the first release liner includes at least one gripping tab that is configured to extend beyond the periphery of the adhesive skin contact layer and to overlap the first and / or second tabs.

[0033] The gripping tab on the first release liner helps facilitate removal of the first release liner. The gripping tab acts as a "handle" that the wearer can grasp to initiate removal of the first release liner.

[0034] In an embodiment, the gripping tab and the first or second tab have different surface structures.

[0035] This is beneficial because the gripping tab is configured to overlap the first and / or second tabs of the second release liner. If the gripping tab were coextensive with the first and / or second tabs, it could be difficult to grasp the gripping tab and separate it from the first or second tabs. The difference in surface structure between the overlapping tabs avoids this problem and facilitates removal of the first release liner.

[0036] In an embodiment, the grip tab is embossed.

[0037] An embossed grip tab is a simple means of providing a slight separation between the grip tab and the first or second tab, providing a different surface texture.

[0038] In another embodiment, the tab on the second release liner located below the gripping tab is embossed.

[0039] In an embodiment, the second release liner comprises at least first and second removable portions.

[0040] The second release liner can thus be removed in two steps, which ensures uniform, more controlled, and wrinkle-free application of the edge of the adhesive skin-contact layer onto the skin, thus providing a three-step adhesion of the dressing to the wearer's skin.

[0041] In an embodiment, the at least first and second removable portions of the second release liner are configured to extend between the first and second tabs of the second release liner.

[0042] Typically, the first and second tabs of the second release liner are integral with the removable portions. The tabs can form the distal ends of the first and second removable portions, respectively. Thus, the second release liner is ultimately removed from the dressing at the outer region of the adhesive skin-contacting layer. This is advantageous because it allows the dressing to be applied to the skin in a sterile manner.

[0043] In an embodiment, each of the first and second tabs is split into two tab pieces, each tab piece forming a distal end portion of the first and second removable portions of the second release liner.

[0044] Thus, the second release liner is divided into two locations, namely, the respective tabs, and the user initiates removal of the second release liner by selecting one of the first or second tabs and one of the tab pieces to grasp. Each removable portion is detached within an outer region of the adhesive skin-contacting layer, thereby preventing contamination of surfaces that will come into contact with the wearer's skin or wound.

[0045] In another embodiment, only one of the first and second tabs is split into two tab pieces, and the second release liner is gradually removed in one step from the edge of the adhesive skin contact layer. In an embodiment, the first and second tabs are split into two tab pieces by a split line, which is a cut line or score line.

[0046] Thus, the tab pieces of the first and second tabs are completely or partially separated.

[0047] The provision of a tear line can facilitate removal of the removable portion of the second release liner.

[0048] Providing score lines can be beneficial from a manufacturing standpoint. Additionally, the score lines allow the wearer, after initiating removal of the first removable portion, to choose whether to continue removing both removable release liner portions in one step, or whether to remove the first removable portion first, followed by the second removable portion.

[0049] In an embodiment, the dividing lines are arranged in an offset manner such that the size, i.e., lateral extension, of each tab piece of the first tab and / or the second tab is different.

[0050] Thus, in an embodiment, the dressing has a lateral (x) extension and a longitudinal (y) extension, and the adhesive skin contact layer is defined by a pair of lateral edges and a pair of longitudinal edges, the first and second tabs are formed to extend beyond the periphery of the lateral and longitudinal edges of the adhesive skin contact layer, and a dividing line is formed to divide the first and second tabs into respective first and second tab pieces, wherein the lateral extension of the first tab piece of the first tab is greater than the lateral extension of the second tab piece of the first tab, and the lateral extension of the first tab piece of the second tab is less than the lateral extension of the second tab piece of the second tab.

[0051] In such embodiments, the caregiver typically initiates removal of each removable portion by grasping the smaller tab, i.e., the tab located closer to a corner of the adhesive skin-contact layer. This can be beneficial for facilitating removal of the removable portion and avoiding the formation of wrinkles when adhering the edge portion of the adhesive skin-contact layer to the skin. The force required to initiate removal of the second release liner is reduced.

[0052] In an embodiment, the second release liner includes a plurality of slits extending therethrough.

[0053] The slits are provided to facilitate removal of the second release liner from the edge portion of the adhesive skin contact layer, and make the second release liner more flexible and pliable.

[0054] In an embodiment, at least 80% of the slits are formed to extend in the same direction as the edge or periphery of the adhesive skin contact layer.

[0055] The slits are therefore oriented in the direction that the second release liner should be removed, making the second release liner more flexible and facilitating its removal from the edge portions of the adhesive skin contact layer.

[0056] In an embodiment, the dressing further includes an absorbent pad disposed between a backing layer and an adhesive skin contact layer, the backing layer and the adhesive skin contact layer being configured to extend beyond the periphery of the absorbent pad to define a boundary along the contour of the absorbent pad.

[0057] The dressing is therefore a bordered dressing dressing and is preferably for use with exuding wounds and / or scars.

[0058] In an embodiment, the edge portion of the adhesive skin contact layer comprises 10 to 60%, for example 30 to 50%, of the surface area of ​​the boundary portion.

[0059] In other words, the absorbent pad is surrounded by the portion of the adhesive skin-contact layer that is not covered by the second release liner. Thus, when the first release liner is removed and during application of the dressing to the skin, the adhesive area surrounding the absorbent pad can be gently attached to the skin in a controlled manner. The area surrounding the absorbent pad, i.e., the area near the edge of the absorbent pad, is particularly prone to wrinkling. Therefore, during the first application step of the dressing onto the skin, the area that bypasses the pad edge is smoothed, and during the second application step, the edge portion of the adhesive skin-contact layer is secured to the skin.

[0060] According to another aspect, there is provided a method of manufacturing a dressing including first and second release liners, the method comprising: - providing a dressing comprising a backing layer, an adhesive skin contact layer, and optionally an absorbent pad disposed between the backing layer and the adhesive skin contact layer, wherein the adhesive skin contact layer comprises a central portion and an edge portion surrounding the central portion; - applying a second release liner to at least a portion of the edge portion of the adhesive skin contact layer; - a method of making a dressing comprising applying a first release liner to the central portion of an adhesive skin contact layer, wherein a second release liner is disposed between an edge portion of the adhesive skin contact layer and the first release liner. is provided.

[0061] The method comprises: - providing a plurality of slits in the second release liner, at least 80% of the slits extending in the same direction as the extension of the edge portion of the adhesive skin contact layer; It may further include:

[0062] Further features and advantages of the present disclosure will become apparent upon studying the appended claims and the following description. It will be apparent to those skilled in the art that different features of the present disclosure may be combined to create embodiments other than those described below without departing from the scope of the disclosure.

[0063] Various aspects of the present disclosure, including particular features and advantages thereof, will be readily understood from the following detailed description and the accompanying drawings. [Brief explanation of the drawings]

[0064] [Figure 1a] FIG. 1a is an exploded view illustrating a dressing according to an exemplary embodiment of the present disclosure. [Figure 1b] FIG. 1b shows a bottom view of a dressing according to an exemplary embodiment of the present disclosure, where the first release liner is transparent. [Figure 1c] FIG. 1c illustrates a top view of a second release liner according to an exemplary embodiment of the present disclosure, with the tab pieces of the first and second tabs being offset. [Figure 2A] 2a-2j show a caregiver applying the dressing to a patient's leg and the steps in which the first and second release liners are removed, respectively. [Figure 2B] 2a-2j show a caregiver applying the dressing to a patient's leg and the steps in which the first and second release liners are removed, respectively. [Figure 2C] 2a-2j show a caregiver applying the dressing to a patient's leg and the steps in which the first and second release liners are removed, respectively. [Figure 2D]2a-2j show a caregiver applying the dressing to a patient's leg and the steps in which the first and second release liners are removed, respectively. [Figure 2E] 2a-2j show a caregiver applying the dressing to a patient's leg and the steps in which the first and second release liners are removed, respectively. [Figure 2F] 2a-2j show a caregiver applying the dressing to a patient's leg and the steps in which the first and second release liners are removed, respectively. [Figure 2G] 2a-2j show a caregiver applying the dressing to a patient's leg and the steps in which the first and second release liners are removed, respectively. [Figure 2H] 2a-2j show a caregiver applying the dressing to a patient's leg and the steps in which the first and second release liners are removed, respectively. [Figure 2I] 2a-2j show a caregiver applying the dressing to a patient's leg and the steps in which the first and second release liners are removed, respectively. [Figure 2J] 2a-2j show a caregiver applying the dressing to a patient's leg and the steps in which the first and second release liners are removed, respectively. [Figure 3] FIG. 3 is a schematic diagram illustrating a method of making a dressing according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0065] The present disclosure will now be more fully described with reference to the accompanying drawings, in which presently preferred embodiments of the disclosure are shown. However, the disclosure may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided for thoroughness and completeness so as to fully convey the scope of the disclosure to those skilled in the art. Like reference numerals refer to like elements throughout.

[0066] 1a shows a dressing 100 including a backing layer 101, an adhesive skin contact layer 102, and a first release liner 103. The adhesive skin contact layer 102 includes a central portion 102a and an edge portion 102b surrounding the central portion 102a, the first release liner 103 is configured to be releasably attached to at least the central portion 102a of the adhesive skin contact layer 102, and the dressing 100 includes a second release liner 104 disposed between the first release liner 103 and at least a portion of the edge portion 102b of the adhesive skin contact layer 102.

[0067] The second release liner 104 is configured to be releasably attached to at least a portion of the edge portion 120 b of the adhesive skin contact layer 102 .

[0068] As used herein, the term "dressing" refers to a wound dressing for application over an existing wound, cut, or scar. The term "dressing" also includes dressings intended to prevent wounds, such as pressure sores, from occurring in the first place. Dressings of the present disclosure may thus be applied to a wound or scar or to intact skin.

[0069] As used herein, "adhesive skin contact layer" means a layer of a dressing configured to be attached to the skin or wound of a wearer. The adhesive skin contact layer is positioned to removably adhere the dressing to the skin surface. This layer is sometimes referred to as the "wound contact layer."

[0070] The term "edge portion" as used herein refers to the peripheral portion of the adhesive skin contact layer. The edge portion is formed to surround the central portion of the adhesive skin contact layer. The edge portion of the adhesive skin contact layer is the portion to which the second release liner is applied. The distance from the periphery of the edge portion The width w1 extending into the covering material may be 0.5 to 2.5 cm, for example 0.8 to 1.5 cm.

[0071] The edge portion 102b typically comprises 0.3 to 30%, for example 0.4 to 15%, of the surface area of ​​the adhesive skin-contact layer 102.

[0072] The "central portion" of the adhesive skin contact layer can comprise 70-99.7% of the surface area of ​​the adhesive skin contact layer. The dimensions of the central portion and the edge portions may each vary depending on the shape and size of the dressing. The dimensions may also vary depending on the size and shape of the absorbent pad (if present), i.e., the size and shape of the boundary portion of the dressing. In embodiments of the present disclosure, an absorbent pad is disposed in the central portion of the adhesive skin contact layer. When an absorbent pad is disposed in the central portion, the boundary portion that circumvents the absorbent pad is typically not covered by the second release liner. Rather, only the edge portion of the boundary portion is covered by the second release liner.

[0073] In the context of the present disclosure, the first release liner 103 is releasably attached to at least the central portion 102a of the adhesive skin contact layer 102. The second release liner 104 is releasably attached to at least a portion of the edge portion 102b of the adhesive skin contact layer 102.

[0074] As used herein, the term "releasably attached" means that the first release liner 103 and the second release liner 104 can be manually peeled away from the rest of the dressing. The first release liner 103 or the second release liner 104, and any portions thereof, are attached such that in the absence of a separation force applied to one or all of the portions, the portions remain attached, and the portions can be separated when a separation force is applied.

[0075] First release liner 103 is formed to cover adhesive skin contact layer 102 and second release liner 104. Thus, first release liner 103 is formed to extend over the entire surface area of ​​the adhesive skin contact layer. Therefore, first release liner 103 can act as a barrier. The barrier protects the sterility of the dressing 100, including all of the layers of the dressing, before the dressing is used.

[0076] The first release liner 103 is configured to be attached to at least the central portion 102a of the adhesive skin-contact layer 102. In embodiments, the first release liner 103 may be adhesively attached to the second release liner 104. However, it is preferred that the first release liner 103 overlies the second release liner 104 but is not adhesively attached to the second release liner.

[0077] The second release liner 104 is positioned to follow the contour of at least 70%, preferably at least 80%, and more preferably at least 90% of the edge portion 102b of the adhesive skin contact layer 102.

[0078] 1a and 1b, the second release liner is positioned to follow the contour of the entire edge portion 102b of the adhesive skin contact layer 102. This is beneficial to ensure wrinkle-free attachment of the edge portion 102b of the adhesive skin contact layer 102 to the skin.

[0079] The first release liner 103 and the second release liner 104 may be formed from the same material or from different materials. The first release liner 103 and the second release liner 104 may have the same or different thicknesses.

[0080] The first release liner 103 and the second release liner 104 may be made of any of a variety of suitable materials known to those skilled in the art, such as polyethylene, polyester, polypropylene, and silicone-coated paper. For example, the release liner may be a polyethylene film having a thickness of 30 to 300 μm, e.g., 50 to 150 μm.

[0081] The second release liner 104 includes a first tab 105 that is formed to extend beyond the periphery of the adhesive skin contact layer 102 and is positioned on a first edge 106 of the edge portion 102b of the adhesive skin contact layer 102.

[0082] As shown in Figures 1a and 1b, the second release liner 104 includes a second tab 107 that is formed to extend beyond the periphery of the adhesive skin contact layer 102 and is positioned on a second edge 108 of the edge portion 102b of the adhesive skin contact layer 102 opposite the first edge 106.

[0083] First tab 105 and / or second tab 107 provide a gripping means that the wearer can use to hold and stretch dressing 100 after first release liner 103 is removed, thereby securing the remainder of dressing 100 to the skin. The fact that the tabs extend beyond the periphery of adhesive skin-contact layer 102 is beneficial in avoiding unwanted interference with the adhesive surface during application. Sterile application of the dressing is thus achieved.

[0084] The dressing shown in Figure 1a is rectangular and has a lateral (x) extension and a longitudinal (y) extension. The adhesive skin contact layer 102 is defined by a pair of lateral edges 109 and 110 that extend parallel to one another in the longitudinal direction and a pair of longitudinal edges 106 and 108 that also extend parallel to one another in the transverse direction. Although the lateral and longitudinal edges are shown in Figure 1a with respect to the adhesive skin contact layer 102, the edges of the backing layer 101 and dressing 100 correspond to the edges of the adhesive skin contact layer 102.

[0085] As used herein, the term "lateral extension" or "lateral direction" refers to the direction extending parallel to the smallest linear dimension of the dressing. The lateral direction is parallel to the x-axis in the drawings.

[0086] The "lateral edges" of any part of the dressing, absorbent pad, adhesive skin contact layer, or release liner, or portions thereof, are the edges that extend longitudinally, i.e., parallel to the y-axis.

[0087] The term "longitudinal extension" or "longitudinal direction" as used herein refers to a direction perpendicular to the lateral extension or lateral direction. The longitudinal direction is consequently parallel to the y-axis in the drawings.

[0088] The "longitudinal edges" of the dressing, absorbent pad, adhesive skin contact layer, or release liner, or any portion thereof, are the edges that extend laterally, i.e., parallel to the x-axis.

[0089] However, the covering 100 of the present disclosure is not limited to any particular shape. The covering may be, for example, square or oval. Alternatively, if the covering is intended to be applied to the wearer's sacrum or heel, the covering 100 may be generally "heart-shaped" or "butterfly-shaped."

[0090] 1a and 1b, first tab 105 and second tab 107 of second release liner 104 are formed to extend beyond the periphery of longitudinal edges 106 and 108 of adhesive skin contact layer 102. In FIGS.

[0091] The first release liner 103 includes at least one gripping tab 111 that extends beyond the periphery of the adhesive skin contact layer 102 and is configured to overlap the first tab 105 and / or the second tab 107.

[0092] 1a and 1b, the gripping tab 111 overlaps the first tab 105 of the second release liner 104. The gripping tab 111 acts as a "handle" that can be grasped by the wearer to remove the first release liner 103 from the adhesive skin-contact layer 102.

[0093] Preferably, the gripping tab 111 and the first tab 105 or the second tab 107 have different surface structures to facilitate removal of the gripping tab 111 from the underlying first tab 105 or second tab 107.

[0094] As shown in Figures 1a and 1b, grip tab 111 is embossed. The embossed surface structure of grip tab 111 is shown in an enlarged view in Figure 1b.

[0095] It is also contemplated within the scope of the present disclosure that first tab 105 or second tab 107 of second release liner 102 located below gripping tab 111 may be embossed.

[0096] It is also contemplated within the scope of the present disclosure that the first release liner 103 including the grip tab 111 is embossed.

[0097] The second release liner 104 can be configured to be removed in one step. For example, the wearer can initiate removal of the second release liner 104 by grasping the first tab or, if present, the second tab. The second release liner 104 can be arranged as a frame formed to follow the contours of the edge portion (i.e., periphery) of the adhesive skin contact layer 102. An end portion of the second "release liner frame" can be positioned in close proximity to the first tab 105. One hand can be used to remove the second release liner 104 from the edge portion 102b of the adhesive skin contact layer 102a, while the other hand can be used to ensure wrinkle-free attachment of the edge of the dressing.

[0098] Alternatively, the second release liner 104 is configured to be removed in two steps, which can improve the controlled attachment of the edge portion 102b of the adhesive skin-contact layer 102 to the skin.

[0099] As shown in Figures 1a and 1b, the second release liner 104 includes at least a first removable portion 104a and a second removable portion 104b.

[0100] First and second removable portions 104 a , 104 b of second release liner 104 are formed to extend between first and second tabs 105 , 107 of second release liner 104 .

[0101] In Figures 1a and 1b, each of the first tab 105 and the second tab 107 is divided into two tab pieces (105a, 105b, 107a, 107b), and each tab piece (105a, 105b, 107a, 107b) forms the distal end portion of the first removable portion 104a and the second removable portion 104b of the second release liner 104.

[0102] The first tab 105 and / or the second tab 107 may be divided into a first tab piece (105a, 105b) and a second tab piece (107a, 107b) by a dividing line 134. The dividing line may be a cutting line or a score line.

[0103] As used herein, the term "cut line" means that the first tab 105 and / or the second tab 107 are cut into two respective tab pieces, such that the first tab pieces (105a, 107a) are completely separated from the second tab pieces (107a, 107b) and are disposed side-by-side.

[0104] As used herein, the term "score line" refers to a partially cut or perforated line. Thus, the first tab pieces (105a, 107a) are partially, but not completely, separated from the second tab pieces (107a, 107b) and positioned in a side-by-side relationship. The score line allows the wearer to separate the two tab pieces by tearing the pieces before removing the removable portions (104a, 104b) of the second release liner 104.

[0105] 1a and 1b, both tabs include a dividing line 134 and two respective tab pieces. In the case of smaller dressing sizes, only one of the tabs may be divided by dividing line 134. The second release liner 104 is thus removed in one step, starting with the first tab piece and ending with the second tab piece, which is disposed on the exterior of the adhesive side of the dressing.

[0106] In another embodiment, first tab 105 is divided by a score line and second tab 107 is divided by a cut line (or vice versa).

[0107] The score lines can be useful for manufacturing purposes, such as to prevent the tab pieces from separating during assembly of the dressing. The score lines also allow the wearer to choose whether to continue removing the first removable portion 104a and the second removable portion 104b in one step, or whether to remove the first removable portion 104a first, followed by the second removable portion 104b.

[0108] When the wearer reaches the score line, he / she will notice a difference in holding force, thus reminding him / her to temporarily stop (or continue, if desired) removing the first removable portion.

[0109] 1a and 1b, the dividing line 134 is centrally located relative to each lateral edge (106, 108). However, it is contemplated that the dividing line 134 may be provided in an "offset" relationship. For example, the sizes of the respective tab pieces of the first and / or second tabs may be different. One of the respective tab pieces may extend laterally greater than the other.

[0110] FIG. 1c shows the second release liner 104 having such an offset arrangement.

[0111] Thus, in an embodiment, the dressing has a lateral (x) extension and a longitudinal (y) extension, and the adhesive skin contact layer (not shown) is defined by a pair of lateral edges (106, 108) and a pair of longitudinal edges (109, 110), and the first tab 105 and the second tab 107 are formed to extend beyond the periphery of the lateral edges (106, 108) and longitudinal edges (109, 110) of the adhesive skin contact layer. The dividing line 134 is formed to divide the first tab 105 and the second tab 107 into respective first and second tab pieces, and the lateral extension of the first tab piece 105a of the first tab 105 is greater than the lateral extension of the second tab piece 105b of the first tab 105, and the lateral extension of the first tab piece 107a of the second tab 107 is less than the lateral extension of the second tab piece 107b of the second tab 107.

[0112] In Figure 1c, since there is no adhesive skin contact layer, the lateral and longitudinal edges are shown relative to the second release liner 104 (in the area where the adhesive skin contact layer is to be placed within the dressing).

[0113] In such an embodiment, the caregiver typically initiates removal of one of the removable portions (104a, 104b) of the second release liner 104 by grasping one of the smaller tab pieces (e.g., the second tab piece 105b of the first tab 105 or the second tab piece 107a of the second tab 107).

[0114] This can be beneficial to facilitate removal of the removable portion and to avoid wrinkles forming when the edge portion of the adhesive skin contact layer is adhered to the skin. Less force is required to initiate removal of the second release liner.

[0115] For example, the caregiver can first grasp the second, smaller tab 105a located closer to a corner of the dressing and finish removing the second removable portion 104b when they reach the parting line 134. The caregiver can then begin removing the first release liner portion 104a by grasping the first, smaller tab 107a, and subsequently remove the first release liner portion from the adhesive surface of the skin-contacting layer.

[0116] The first tab piece 105a of the first tab 105 and the first tab piece 107a of the second tab form a distal end portion of the first detachable portion 104a. The second tab piece 105b of the first tab 105 and the second tab piece 107b of the second tab 107 form a distal end portion of the second detachable portion 104b.

[0117] The second release liner 104 may include a plurality of cuts extending therethrough.

[0118] The cuts may have any shape, however preferably the cuts are provided as slits 112 as shown in Figures 1a and 1b.

[0119] The slits 112 are formed to follow the contours of the second release liner 104. Thus, the slits are provided to follow the contours of the edge portion 102b, i.e., the contours of the peripheral edge of the adhesive skin-contact layer 102 (and dressing 100). The slits 112 make the second release liner 104 flexible, allowing it to be easily removed using only one hand. Because the first release liner 103 is formed to cover or overlap the second release liner 104, the dressing is still protected from unwanted contaminants. Therefore, providing the slits 112 in the second release liner 104 does not jeopardize sterility before or during application of the dressing.

[0120] At least 80% of the slits 112 are formed to extend in the same direction as the edge portion 102b, ie, the peripheral edge of the adhesive skin-contact layer 102 (and dressing 100).

[0121] The periphery is defined in FIG. 1 by the lateral edges (106 and 108) and the longitudinal edges (109 and 110).

[0122] Preferably, at least 90% of the slits 112 are formed to extend in the same direction as the peripheral extension of the dressing 100 .

[0123] The slits may be arranged in a single longitudinal row of slits 112 arranged parallel to the periphery of the adhesive skin contact layer 102. Alternatively, the slits may be arranged in two or three longitudinal rows of slits 112.

[0124] 1a and 1b, the dressing 100 includes an absorbent pad 113 disposed between a backing layer 101 and an adhesive skin contact layer 102, the backing layer 101 and the adhesive skin contact layer 102 being configured to extend beyond the periphery of the absorbent pad 113 to define a boundary portion 114 along the contour of the absorbent pad 113.

[0125] The concepts of the present invention are particularly useful for bordered dressings that include an absorbent pad. As previously mentioned, the pad is typically thicker than the backing layer and adhesive skin-contacting layer, and gaps and wrinkles can form around the edges of such pads. The area surrounding the pad edge can thus be attached to the skin in a controlled, substantially wrinkle-free manner.

[0126] 1a, the absorbent pad 113 includes a plurality of cuts 115 that extend at least partially through the absorbent pad 113. The cuts 115, which may have a variety of shapes, make the pad more flexible and improve the overall flexibility of the dressing.

[0127] Each of the cuts 115 shown in Figure 1a includes three cuts extending from a common starting point. The angle between such cuts may be between 40 and 150 degrees. The pad or pad layer is therefore cut in both the longitudinal (y) and transverse (x) directions of the pad, making the pad flexible in all directions.

[0128] The absorbent pad 113 may include one or more layers. If the absorbent pad 113 includes several pad-forming layers, the discontinuities 115 may extend within at least one of such layers.

[0129] The absorbent pad is located in the central portion of the dressing. The edge portion 102b of the adhesive skin-contact layer 102 occupies 10-60%, for example 30-50%, of the surface area of ​​the boundary portion 114.

[0130] In other words, the area bypassing the absorbent pad is not covered by the second release liner, but instead is used to firmly anchor the central portion 102a of the adhesive skin contact layer 102 in this area, thereby preventing wrinkles from forming in this area.

[0131] 1b, the width w3 of the border portion is greater than the width w1 of the edge portion 102b of the adhesive skin-contact layer. The width w2 of the central portion 103a is greater than the width of the pad 113.

[0132] In the various embodiments described above, the backing layer 101 can be a vapor-permeable thin film, sheet, or membrane. Suitable backing layer materials include, but are not limited to, polyurethane, polyethylene, or polyamide films, silicone films, polyester-based nonwoven materials, and laminates of polyester-based nonwoven materials and polyurethane films. Preferably, the backing layer is a polyurethane film having a thickness of 5 to 40 μm, e.g., 15 to 25 μm. A thin layer of adhesive, e.g., a polyacrylate adhesive, can be applied to the backing layer 101 to attach the backing layer 101 to the adhesive skin-contact layer 102, or the absorbent pad 113, if present, or any other layer of the dressing.

[0133] The absorbent pad 113 may comprise a foam or gel. It may comprise a superabsorbent material, such as superabsorbent polymer (SAP) or superabsorbent fiber (SAF).

[0134] For example, the absorbent pad 113 may include two or more layers with different properties bonded together.

[0135] In an embodiment, the absorbent pad 113 includes a first absorbent layer, a liquid acquisition layer, such as a nonwoven fabric, and a second absorbent layer. The first absorbent layer may be a superabsorbent layer, and the second absorbent layer may include an absorbent foam. Typically, the superabsorbent layer is disposed between the liquid acquisition layer and the second absorbent layer, and the second absorbent layer is the bottom layer of the absorbent pad 113. One example of a foam material suitable for use in the second absorbent layer is polyurethane foam.

[0136] The superabsorbent layer may comprise a superabsorbent polymer (SAP). A "superabsorbent polymer" or "SAP" is a polymer capable of absorbing up to 300 times its own weight in aqueous fluids. Superabsorbent polymers are composed of water-swellable, water-insoluble polymers that can absorb large amounts of fluid upon forming a hydrogel. Superabsorbent polymers for use in accordance with the present disclosure may be inorganic or organic cross-linked hydrophilic polymers, such as polyvinyl alcohol, polyethylene oxide, cross-linked polyacrylates, and the like. Typically, superabsorbent polymers (SAP) comprise sodium acrylate. The SAP material may be in the form of particles, fibers, flakes, or the like.

[0137] The liquid distribution layer may comprise any material capable of efficiently distributing exudate. For example, the liquid distribution layer may comprise a nonwoven material. The nonwoven provides a well-balanced stiffness to the layer and to the dressing itself. The nonwoven can efficiently distribute and spread the liquid absorbed by the superabsorbent layer, allowing the liquid to evaporate through the backing layer and over a large surface area. For example, the nonwoven may comprise viscose, polyester, or a blend thereof.

[0138] The layers can be joined by gluing, lamination, using pressure and heat.

[0139] The absorbent pad 113 may include additional layers such as liquid transport layers, various combinations of foam and nonwoven layers bonded together.

[0140] The absorbent pad 113 may contain a biologically active substance, such as a compound having an antibacterial or wound-healing effect. Examples of such compounds include silver compounds, such as silver salts and metallic silver, biguanide salts, such as polyhexamethylene biguanide (PHMB) or any salt thereof, or polyhexamethylguanide (PHMG) or any salt thereof, or chlorhexidine or any salt thereof, iodine, salicylic acid or any salt thereof, acetylsalicylic acid or any salt thereof, quaternary ammonium salts, such as benzethonium chloride, povidone-iodine (betadine), lactoferrin, xylitol, antimicrobial peptides, such as human cationic antimicrobial protein 18 (hCAP18 or LL37), borneol, bismuth subgallate, antifungal agents, and antibiotics, such as gentamicin and streptomycin.

[0141] The backing layer 101 and the adhesive skin-contact layer 102 may be bonded to one another in areas of both layers that extend beyond the periphery of the absorbent pad 113. The backing layer may be bonded to the absorbent pad 113, for example, by an adhesive, such as a pressure-sensitive adhesive (e.g., polyacrylate).

[0142] To achieve sufficient adhesive properties, border portion 114 may have a width w3 of 10-50 mm, for example 20-30 mm, and may extend along the contours of absorbent pad 113. Smaller sized dressings may have smaller border portions than larger sized dressings. This allows for easy handling and application of the product while still maintaining sufficient adhesive strength during application.

[0143] Preferably, the adhesive skin contact layer 102 comprises a silicone adhesive, which is gentle on the skin and allows for removal of the dressing without causing damage to the skin.

[0144] For example, the adhesive skin-contact layer 102 may include a polymer-based film and a silicone gel layer, where the silicone gel layer is configured to contact the wearer's skin.

[0145] The polymer film is preferably a breathable film and may comprise, for example, polyethylene, polyamide, or polyester polyurethane. Preferably, the polymer film comprises polyurethane. The thickness of the polyurethane film may be 15 to 100 μm, for example, 20 to 80 μm, preferably 20 to 50 μm.

[0146] Examples of silicone gels suitable for use in the adhesive skin contact layer 102 and / or silicone gel layer include two-component RTV systems, such as Q72218 (Dow Corning) and SilGel 612 (Wacker Chemie AG), as described herein, and NuSil silicone elastomers. In embodiments of the present invention, the adhesive may comprise a soft silicone gel having a softness (penetration) of 8 to 22 mm, e.g., 12 to 17 mm, as measured by a method based on ASTM D 937 and DIN 51580, as described in reference 4 (European Patent Application No. 14194054.4). The thickness of the silicone gel layer is typically at least 20 μm. The thickness of the silicone gel layer may be 100 to 200 μm.

[0147] Preferably, the adhesive skin-contacting layer 102 includes a plurality of apertures 116 in the area underlying the absorbent pad, but is devoid of apertures in the area forming the boundary portion 114 .

[0148] The apertures 116 serve to improve absorption of wound exudate into the dressing and are thus located in areas where absorption occurs. The area of ​​the absorbent layer forming the boundary portion 114 of the dressing is preferably devoid of apertures, thereby improving adhesion to the skin and thereby increasing the residence time of the dressing.

[0149] If the adhesive skin-contact layer 102 includes a polymeric film and a silicone gel layer, the aperture 116 extends through both of these layers.

[0150] The adhesive skin contact layer 102 is positioned to receive bodily fluids, such as wound exudate from the wound, while the absorbent pad 113 functions to absorb the wound exudate and transport it away from the wound by evaporation from the top of the dressing, i.e., through the backing layer 101.

[0151] In an embodiment, at least one of the adhesive skin contact layer 102, the backing layer 101, and the first release liner 103 is substantially transparent.

[0152] This is beneficial as it allows the wearer to distinguish the absorbent pad 113 from the border portion 114 so that the dressing can be properly positioned over, for example, a cut.

[0153] Preferably, both the backing layer and the adhesive skin contact layer are transparent.

[0154] In an embodiment, the first and second release liners have different material properties selected from composition, thickness, or color.

[0155] The first release liner may be of any color, but is preferably white or clear.

[0156] Typically, the first and second release liners have different colors, for example, if the first release liner is clear and the second release liner is white, the color contrast can attract the user's attention and guide the user to remove the release liners in the correct manner.

[0157] In embodiments, the gripping tab 111 and / or the first tab 105 or second tab 107 are colored to further facilitate the user's proper removal of the release liner. Colored tabs may also be considered aesthetically desirable by both healthcare professionals and patients. The color may be any color that contrasts with the color of the release liner, such as green, blue, purple, red, black, etc. The use of color on the gripping member or first or second tab creates a contrast with the first release liner, which is typically white or substantially transparent. The contrast is provided to draw attention to the portion of the dressing that should be removed first.

[0158] The gripping tab 111 of the first release liner 103 and / or the first tab 105 or second tab 107 of the second release liner 104 may include markings 117. The markings 117 may be any type of marking or indicium to indicate the removal of the release liners and release liner portions. The markings are provided to indicate the order in which the release liners should be removed and to help guide the wearer in properly applying the dressing on the skin.

[0159] The markings 117 may be, for example, arrows or numbers to clarify the order in which the release liners should be removed.

[0160] For example, as shown in Figure 1b, the first gripping tab 111 may be labeled with the marking 1 (117a) to symbolize that the first release liner 103 must be removed first. The first tab 105 of the second release liner may be labeled 2.

[0161] 1a and 1b, both tab pieces (107a and 107b) of second tab 107 are labeled with a 2 and an arrow, since the caregiver may choose either of the removable portions to remove first (the order is not really important for purposes of the present invention).

[0162] The first release liner 103 may include one removable portion, as shown in FIGS. 1 and 2 . However, it is also contemplated that the first release liner may include two or three removable portions. Such removable portions of the first release liner are releasably attached to one another. When the first release liner includes two or more removable portions, the first release liner may be divided by a dividing line. The first and second removable portions of the first release liner overlap along the dividing line. This is important to ensure that the adhesive skin contact layer is completely covered and no gaps are formed, thereby preventing contaminants from penetrating into the dressing. The overlapping removable portions may form a gripping member that the user can grasp to remove the removable portions. For example, an edge of the first removable portion may be folded over itself, and an edge of the second removable portion may be formed to overlap the folded edge. This arrangement eliminates the risk of contaminating the adhesive skin contact layer 102. This is because the overlap between the first and second tabs prevents contaminants from penetrating into the coating layer.

[0163] 2a-2j, the application of a coating according to the present disclosure is shown.

[0164] Figure 2a shows a patient's leg 118 having a wound 119 and a caregiver 120 holding a dressing 100 according to the present disclosure. In a first step (see Figures 2a and 2b), the caregiver 120 grasps the gripping tab 111 of the first release liner 103. Using one hand 121a, the caregiver gradually removes the first release liner 103 while using the other hand 121b to secure the dressing 100 to the patient's skin (see Figure 2c). During removal of the first release liner 103, or after complete removal of the first release liner 103, the center of the dressing can be precisely secured to the skin, so that substantially no wrinkles form around the edges of the absorbent pad 113.

[0165] 2d shows the dressing 100 after it has been applied to a patient's leg 118 and the first release liner 103 has been removed. The dressing 100 still includes the second release liner 104 disposed on the edge portion 102b of the adhesive skin-contacting layer. The edge portion 102b has not yet been adhered to the patient's skin.

[0166] In the next step (FIGS. 2e-2f), the caregiver grasps the first tab 105 of the second release liner 104. The first tab includes an arrow-shaped marking 117 and is labeled 2. The second release liner 104 includes two removable portions 104a and 104b. The first tab 105 and the second tab 107 of the second release liner are divided into two tab pieces. The first tab piece 105a is integral with the first removable portion 104a, and the second tab piece 105b is integral with the second removable portion 104b. The caregiver 120 uses the first tab piece 105a to remove the first removable portion 104a of the second release liner 104 (see FIG. 2e). The caregiver can use their finger 122 to gently press the edge of the dressing against the wearer's skin. The slits 112 are shaped to follow the contour of the edge of the adhesive skin-contact layer (and of the dressing 100). This arrangement facilitates removal of the second release liner. Figure 2f shows the step when the first removable portion 104a of the second release liner 104 is removed. The first removable portion 104a is removed in a location external to the dressing and can be discarded.

[0167] Figures 2g-2i illustrate the removal of the second removable portion 104b of the second release liner. The second tab piece 105b of the first tab 105 is grasped, and the caregiver can carefully attach the edge portion of the adhesive skin-contact layer of the dressing to the skin while simultaneously removing the second removable portion of the second release liner. One hand 121a is used to gradually remove the second removable portion 104b, and the other hand 121b can assist by gently pressing the edge of the dressing onto the skin (see Figures 2h-2i).

[0168] FIG. 2j shows the dressing 100 when applied to a wearer's leg, with both release liners removed and discarded.

[0169] The process of removing the release liner from the adhesive skin contact layer allows for improved control of the thin border dressing, prevents the edges of the dressing from folding, and allows for precise positioning of the dressing on the skin in a sterile, wrinkle-free manner.

[0170] Referring to Figure 3, a method of manufacturing a dressing including a first release and a second release liner is shown. The method includes: - providing a dressing 100 comprising a backing layer 101, an adhesive skin contact layer 102, and optionally an absorbent pad 113 disposed between the backing layer 101 and the adhesive skin contact layer 102, wherein the adhesive skin contact layer 102 comprises a central portion 102a and edge portions 102b surrounding said central portion 102a; - applying a second release liner 104 to at least a portion of the edge portion 102b of the adhesive skin contact layer 102; a first release liner 103 is applied to the central portion 102a of the adhesive skin contact layer 102, and the second release liner 104 is disposed between the edge portion 102b of the adhesive skin contact layer 102 and the first release liner 103; This includes:

[0171] The first release liner 103 is formed to cover the entire adhesive skin contact layer, in other words, the first release liner 103 is formed to cover the second release liner 104.

[0172] 3, a dressing is first prepared that includes a backing layer, an adhesive skin-contacting layer, and an absorbent pad disposed between the backing layer and the adhesive skin-contacting layer. Procedures for preparing such dressings are well known to those skilled in the art.

[0173] First, a plurality of coating materials are fed onto a conveyor belt. The plurality of coating materials are provided as uncut sheets of coating material 123. The excess border material of the coating material is cut or "trimmed" by a first cutting tool 124.

[0174] A second release liner is then applied onto each of the sheets of coating material 123. A sheet of second release liner material 125 is first fed through a second cutting tool 126, which cuts the sheet 125 into a shape to form the second release liner. The sheet is cut so that the second release liner is formed into a frame. The frame portion forming the first and second tabs is cut into two tab pieces. The second release liner thus includes two removable frame portions. Waste material 127 from cutting is removed from the process, and the resulting second release liner frame is applied to a plurality of coating materials.

[0175] A first release liner is then applied. A sheet of first release liner material 129, which may be the same or different from the material forming the second release liner, is then applied. The peripheral edge of sheet 129 is embossed by embossing tool 130. Embossing tool 130 has a structured surface formed to impart a structured surface on the peripheral edge of first release liner sheet 129. A plurality of dressings, including a first release liner and a second release liner between the adhesive skin-contact layer of the dressing and the first release liner, are fed into a pair of opposing cylindrical rolls 131. These rolls serve to attach the first and second release liners to the adhesive skin-contact layer of the dressing. The process is not limited to any particular means for attaching the first and second release liners; any means known to those skilled in the art may be utilized. The longitudinal edges of the first release liner sheet are embossed, as indicated by the numeral 133 in FIG. 3 .

[0176] The sheet of dressings is then cut to a predetermined shape by a third cutting tool 132. A dressing 100 comprising first and second release liners is thus provided. The embossed grip tab is designated 111 in FIG. 3. The embossed grip tab 111 overlaps and is coextensive with the first tab of the second release liner (not shown). The second tab 107 of the second release liner extends beyond the peripheral edge of the adhesive skin-contact layer. The second tab 107 includes a cut extending through the release liner tab so that two tab pieces are formed. The first tab of the second release liner also includes a similar cut (not shown in FIG. 3).

[0177] The process may further include providing a plurality of slits in the second release liner, at least 80% of the slits being formed to extend in the same direction as the extension of the edge portions of the adhesive skin contact layer.

[0178] The slits may be provided by the first cutting tool 126. In other words, the slits are provided at the same time that the second release liner is cut to shape.

[0179] The process of the present disclosure is not limited to using a particular means for cutting the dressing to a predetermined shape or for cutting the release liner; any technique may be used. Although the cutting tool and fixing tool are shown as cylindrical rolls in Figure 3, any means for cutting or fixing layers of dressing may be used. For example, cutting can be accomplished by a laser.

[0180] The terms, definitions, and embodiments of all aspects of this disclosure apply mutatis mutandis to other aspects of this disclosure.

[0181] Although this disclosure has been described with reference to specific exemplary embodiments thereof, it is evident that many different alterations, modifications and the like will become apparent to those skilled in the art.

[0182] Variations of the disclosed embodiments can be understood and effected by those skilled in the art in practicing the present disclosure, from a study of the drawings, the disclosure, and the appended claims. Moreover, in the claims, "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plural form.

Claims

1. A dressing (100) comprising a backing layer (101), an adhesive skin contact layer (102), and a first release liner (103), wherein the adhesive skin contact layer (102) comprises a central portion (102a) and an edge portion (102b) surrounding the central portion (102a), and the first release liner (103) is configured to be releasably attached to at least the central portion (102a) of the adhesive skin contact layer (102). The dressing (100) is characterized in that it includes a second release liner (104) disposed between the first release liner (103) and at least a portion of the edge portion (102b) of the adhesive skin contact layer (102).

2. 2. The dressing (100) of claim 1, wherein the second release liner (104) is positioned to follow the contour of at least 70%, preferably at least 80%, of the edge portion (102b) of the adhesive skin contact layer (102).

3. The dressing (100) according to claim 1 or 2, wherein said edge portion (102b) constitutes 0.3 to 30%, preferably 0.4 to 15%, of the surface area of ​​said adhesive skin contact layer (102).

4. 4. The dressing (100) of claim 1, wherein the second release liner (104) includes a first tab (105), the first tab (105) being formed to extend beyond the periphery of the adhesive skin contact layer (102) and being positioned on a first edge (106) of the edge portion (102b) of the adhesive skin contact layer (102).

5. 5. The dressing (100) of claim 4, wherein the second release liner (104) includes a second tab (107), the second tab (107) being formed to extend beyond the periphery of the adhesive skin contact layer (102) and being positioned on a second edge (108) of the edge portion (102b) of the adhesive skin contact layer (102) opposite the first edge (106).

6. 6. The dressing (100) of claim 4 or 5, wherein the first release liner (103) includes at least one gripping tab (111), the gripping tab (111) being configured to overlap the first tab (105) and / or the second tab (107) of the second release liner (104) so ​​as to extend beyond the periphery of the adhesive skin contact layer (102).

7. 7. The covering (100) of any one of claims 4 to 6, wherein the gripping tab (111) and the first tab (105) or the second tab (107) have different surface structures.

8. 8. The dressing (100) of claim 7, wherein the gripping tab (111), the first tab (105), or the second tab (107) is embossed.

9. The dressing (100) of any one of claims 1 to 8, wherein the second release liner (104) comprises at least a first removable portion (104a) and a second removable portion (104b).

10. 10. The dressing (100) of claim 9, wherein the at least first and second removable portions (104a, 104b) of the second release liner (104) are formed to extend between the first and second tabs (105, 107) of the second release liner (104).

11. 11. The dressing (100) of claim 10, wherein each of the first tab (105) and the second tab (107) is divided into two tab pieces (105a, 105b, 107a, 107b), each tab piece (105a, 105b, 107a, 107b) forming a distal end portion of the first (104a) and second (104b) removable portion of the second release liner (104).

12. 12. The covering material (100) of claim 11, wherein each of the first tab (105) and the second tab (107) is divided into two tab pieces (105a, 105b, 107a, 107b) by a dividing line (134), the dividing line (134) being a cutting line or a score line.

13. The dressing has a lateral (x) extension and a longitudinal (y) extension, the adhesive skin contact layer (102) is defined by a pair of lateral edges (106, 108) and a pair of longitudinal edges (109, 110), the first (105) and the second (107) tabs are formed to extend beyond the periphery of the lateral (106, 108) and longitudinal edges (109, 110) of the adhesive skin contact layer (102), and the dividing line (134) is formed in a front 13. The covering (100) of claim 12, wherein the first (105) and second (107) tabs are formed to divide the first (105) and second (107) tabs into respective first and second tab pieces, wherein a lateral extension of the first tab piece (105a) of the first tab (105) is greater than a lateral extension of the second tab piece (105b) of the first tab (105), and a lateral extension of the first tab piece (107a) of the second tab (107) is less than a lateral extension of the second tab piece (107b) of the second tab (107).

14. The dressing (100) of any one of claims 1 to 13, wherein the second release liner (104) includes a plurality of slits (112) extending therethrough.

15. 15. The dressing (100) of claim 14, wherein at least 80% of the slits (112) are formed to extend in the same direction as the edge portion (102b) of the adhesive skin contact layer (102).

16. 16. The dressing (100) of any one of claims 1 to 15, further comprising an absorbent pad (113) disposed between the backing layer (101) and the adhesive skin contact layer (102), the backing layer (101) and the adhesive skin contact layer (102) being formed to extend beyond the periphery of the absorbent pad (113) to define a boundary portion (114) along the contour of the absorbent pad (113).

17. 17. The dressing (100) of claim 16, wherein the edge portion (102b) of the adhesive skin contact layer (102) constitutes 10-60%, for example 30-50%, of the surface area of ​​the border portion (114).

18. A manufacturing method (300) for manufacturing a dressing (100) including the first release liner (103) and the second release liner (104), the manufacturing method (300) comprising: - providing a dressing (100) comprising a backing layer (101), an adhesive skin contact layer (102), and optionally an absorbent pad (113) arranged between said backing layer (101) and said adhesive skin contact layer (102), said adhesive skin contact layer (102) comprising a central portion (102a) and edge portions (102b) surrounding said central portion (102a); - applying a second release liner (104) to at least a portion of the edge portion (102b) of said adhesive skin contact layer (102); - applying a first release liner (103) to the central portion of the adhesive skin contact layer (102) of the dressing (100), and the second release liner (104) being disposed between the edge portion (102b) of the adhesive skin contact layer (102) and the first release liner (103); A manufacturing method (300) for manufacturing a dressing (100), comprising:

19. The manufacturing method comprises: - the second release liner (104) is provided with a plurality of slits (112), at least 80% of which are formed to extend in the same direction as the edge portion (102b) of the adhesive skin contact layer (102); The method (300) of claim 18, further comprising:

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