The present invention relates to a bandage including a perforated adhesive layer including variably sized, shaped and spaced perforations.
Bandages including absorbent material are typically provided to cover wounds while they heal. Bandages may also be used as a preventative measure to prevent formation of sores or wounds. Conventional bandages typically include openings in an adhesive layer that contacts the user's skin to allow exudate from the wound to be drawn away from the wound site and absorbed in an absorbent layer. The inclusion of these perforations allows fluid to be absorbed into the bandage, however, may negatively affect adhesion of the bandage to the user's skin.
Accordingly, it would be beneficial to provide a bandage including an adhesive layer that optimizes absorption of fluid from the wound while providing improved adhesion to the user's skin.
It is an object of the present disclosure to provide a bandage that optimizes absorption of fluid from a wound covered by the bandage while improving adhesion to the user's skin.
A bandage in accordance with an embodiment of the present disclosure includes: a top film; an absorbent layer positioned below the top film; an adhesive layer provided below the absorbent layer; wherein the adhesive layer includes: a layer of adhesive provided on a bottom surface of the adhesive layer; at least one central opening provided in a central portion of the adhesive layer, the at least one central opening having a first size and a first shape configured to maximize fluid passage into the absorbent layer; and at least one peripheral opening provided in a peripheral portion of the adhesive layer, the at least one peripheral opening having a second size and a second shape configured to maximize adhesion of the adhesive layer to a user's skin.
In embodiments, the absorbent layer includes an upper layer adhered to the top film and a lower layer adhered to the adhesive layer.
In embodiments, the absorbent layer includes a superabsorbent layer.
In embodiments, the first size of the at least one central opening is larger than the second size of the at least one peripheral opening.
In embodiments, the at least one central opening includes a first plurality of central openings.
In embodiments, each central opening of the first plurality of central openings has the first shape.
In embodiments, at least a first group of central openings of the first plurality of central openings have the first shape and a second group of central openings of the first plurality of central openings have a third shape different from the first shape.
In embodiments, at least a first group of central openings of the first plurality of central openings are arranged in a first pattern.
In embodiments, at least a second group of central openings of the first plurality of central openings are arranged in a second pattern.
In embodiments, the second pattern is the same as the first pattern.
In embodiments, the second pattern is different from the first pattern.
In embodiments, at least one central opening of the first plurality of central openings is larger than at least one other central opening of the first plurality of central openings.
In embodiments, a space between the first plurality of central openings varies to maximize fluid passage into the absorbent layer.
In embodiments, the at least one central opening comprises a curved slot.
In embodiments, the at least one peripheral opening comprises a second plurality of central openings.
In embodiments, each peripheral opening of the second plurality of central openings has the second shape.
In embodiments, at least a third group of peripheral openings of the second plurality of peripheral openings have the second shape and a fourth group of peripheral openings of the second plurality of peripheral openings have a fourth shape different from the second shape.
In embodiments, at least one peripheral opening of the second plurality of peripheral openings is larger than at least one other peripheral opening of the second plurality of peripheral openings.
In embodiments, at least a third group of central openings of the second plurality of peripheral openings are arranged in a third pattern.
In embodiments, at least a fourth group of central openings of the second plurality of peripheral openings are arranged in a fourth pattern.
In embodiments, the fourth pattern is the same as the third pattern.
In embodiments, the fourth pattern is different from the third pattern.
In embodiments, a space between the second plurality of peripheral openings varies to minimize adhesion.
In embodiments, the at least one peripheral opening comprises a curved slot.
In embodiments, the adhesive layer includes a perforation free region positioned between the at least one central opening and the at least one peripheral opening that does not include any openings.
The above and related objects, features and advantages of the present disclosure will be more fully understood by reference to the following, detailed description of the preferred, albeit illustrative, embodiments of the present invention when taken in conjunction with the accompanying figures, wherein:
A bandage 10 in accordance with an embodiment of the present disclosure is illustrated in
In embodiments, a silicone adhesive layer 16 may be provided under the absorbent layer 14 and may be positioned to be in contact with the user's skin when the bandage is in place on the user's body. In an embodiment, the adhesive layer 16 may be implemented using a clear polyurethane film with a silicone based adhesive provided at least on a bottom surface thereof to secure the bandage 10 to the user's skin. In embodiments, the adhesive layer 16 may be adhered to the absorbent layer 14. In embodiments, where the absorbent layer 14 includes the first and second absorbent layer 14a, 14b, the adhesive layer 16 may be adhered to the second, lower absorbent layer 14b.
In embodiments, the silicone adhesive of the adhesive layer 16 adheres to the user's skin around the wound while avoiding a strong bond with the wound. In embodiments, the silicone adhesive layer 16 may include a plurality of perforations 16a, 16b formed therethrough. In embodiments, the perforations 16a, 16b may be provided to allow exudate from the wound to pass through the adhesive layer 16 into the absorbent layer 14. In embodiments, a first set of perforations 16a may be positioned around the periphery of the bandage 10 and may have a first size which is smaller than a second size of the second set of perforations 16b positioned in an inner area of the bandage 10 which may be positioned over the wound. In embodiments, the first set of perforations 16a are between 0.3-0.7 mm, while the second set of perforations 16b are between 1.1-1.5 mm. In embodiments, the first set of perforations 14a are provided around a periphery of the bandage 10 and typically outside the borders of the wound. The smaller size of these perforations 14a maximizes the surface area in contact with the skin and allows for a strong bond between the bandage 10 and the user's skin surrounding the wound while still allowing any fluid around the periphery of the wound to pass out through the openings 14a. In embodiments, the second set of perforations 16b are formed in a central portion of the bandage adjacent to the absorbent layer 14 and over the wound such that exudate from the wound passes through the perforations 16b into the absorption layer 14. In embodiments, the larger size of the perforations 16b allows for more exudate to pass through the perforations 16b and into the absorbent layer 14 from the wound. In embodiments, the larger size of the perforations 16b reduces contact between the adhesive and the wound such that the bandage 10 will release from the wound when necessary. In embodiments, the adhesive layer 16 and the film 12 extend outward beyond the periphery of the absorbent layer 14. In embodiments, other materials may be used to make the film in the adhesive layer 16, provided that the adhesive that faces the user's skin is silicone based. In embodiments, any adhesive that is suitable for contact with a user's skin may be used. In embodiments, the perforations 16a, 16b in the adhesive layer 16 allow exudate to pass therethrough and into the absorbent layer 14. The silicone adhesive layer 16 provides a stable and firm connection to the user's skin to keep the bandage 10 in place while being relatively comfortable. In addition, the silicone adhesive allows for relatively easy removal, without damaging the wound.
In embodiments, one or more protective liners 18a, 18b may be provided to cover the perforated silicone adhesive lower layer 16 prior to use. In embodiments, the protective liners 18a, 18b are preferably removable from the adhesive layer 16 and are preferably made of polyethylene. In embodiments, the liners 18a, 18b may be made of a coated paper material. In embodiments, the liners 18a, 18b may be made of other materials, provided that they allow them to be removable from the adhesive layer 16 without damaging the adhesive.
In embodiments, a packaging element may be provided to store the bandage 10 before use. In embodiments, the packaging element may be made of a combination of paper and polyethylene, or paper and forms a pouch or pocket in which the bandage 10 may be stored. In embodiments, the packaging element may be made of any other suitably durable material. In embodiments, the packaging element may be made of a material that is suitable to allow for sterilization of the bandage 10 while in place in the packaging element. In embodiment the packaging element may be made of a material that is impervious to liquids. In embodiments, the packaging element may be made of a material that allows liquid to exit, but not enter, or that allows liquid to enter but not exit. In embodiments, the packaging element may be transparent or include transparent portions. In embodiments, the packaging element may include an upper part and a lower part, with the bandage 10, including the layers discussed above, sandwiched between the upper and lower parts.
In embodiments, the shape, size, spacing and/or orientation of the perforations 16a, 16b may be varied in order to maximize adhesion between the bandage 10 and the user's skin around the wound while allowing for optimal permeability to draw fluid away from the wound covered by the bandage. In general, optimal permeability is desired in the center portion of the bandage 10 that covers and contacts the wound to allow fluid to be drawn away and promote healing, while adhesion is preferably optimized around the edges of the bandage, which extend beyond the border of the wound to promote a strong connection between the bandage 10 and the user's skin outside of the wound area so that the bandage is securely held in place. In general, the more surface area of the adhesive layer 16 that contacts the user's skin, the stronger the adhesion. As a result, small perforations maximize surface area in contact with the user's skin and generally provide for better adhesion. Small perforations, however, may limit the amount of exudate that may pass through the adhesive layer 16, and thus, tend to result in lower permeability of the adhesive layer 16. Larger perforations, which result in less surface area in contact with the user's skin, tend to result in increased permeability, but reduced adhesion.
In embodiments, the shape of the perforations 16a, 16b provided in the adhesive layer 16 may be varied, which may vary the effective surface area of the adhesive layer 16 in contact with the user.
In embodiments, circular shaped perforations 216a may be provided in the adhesive layer 16 and clustered in groups as can be seen in
In embodiments, one or more perforations 216c may have a wedge shape and may be provided in the adhesive layer 16 as can be seen in
In embodiments, since the periphery of the bandage 10, and the adhesive layer 16 is generally positioned outside of the wound boundary, there may be little to no need to provide perforations in this area since there is no or minimal exudate being expressed in the area.
In embodiments, the first layer 114a or the second layer 114b may be made of superabsorbent material. In embodiments, the intermediate layer 114c may be made of any other absorbent material. In embodiments, as illustrated in
In embodiments, a silicone adhesive layer 116 may be provided under the absorbent layer 114 and may be positioned to be in contact with the user's skin like the adhesive layer 16. In embodiments, the adhesive layer 116 may be implemented using a clear polyurethane film with a silicone based adhesive provided at least on a bottom surface thereof to secure the bandage 110 to the user's skin like the adhesive layer 16. In embodiments, the adhesive layer 116 may be adhered to the absorbent layer 114, for example, the second, lower absorbent layer 114b. In embodiments, the adhesive layer 1116 may include a variety of perforations. In embodiments, a central portion of the absorbent layer 116 may include large openings 1116a to allow exudate from the wound to pass through and into the adhesive layer 114. In embodiments, a perforation free zone 1116b surrounds the large openings 1116a to provide for improved adhesion to the user's skin. In embodiments, this perforation free zone 1116b is preferably provided such that it is outside the boundary of the wound when the bandage 110 is in place and provides a seal around the periphery of the wound. In embodiments, a small perforation zone 1116c may be provided around the perforation free zone 1116b. In embodiments, the small perforation zone 1116c may include small perforations, smaller than the large opening 1116a such that the increased surface area allows for better adhesion to the user's skin. In embodiments, a larger perforation zone 1116d may be provided around the small perforation zone 1116d on the periphery of the bandage 110. In embodiments, the large openings of this larger perforation zone 1116d may be aligned with the edges of the top film 112 such that adhesive on a bottom of the top film 112 may adhere to the user's skin and provide an additional seal around the bandage 110.
Although the present invention has been described in relation to particular embodiments thereof, many other variations and modifications and other uses will become apparent to those skilled in the art. It is preferred, therefore, that the present invention be limited not by the specific disclosure herein.
The present application claims benefit of and priority to U.S. Provisional Patent Application No. 63/325,370 filed Mar. 30, 2022 entitled BANDAGE WITH ADHESIVE LAYER HAVING VARYING PERFORATION SHAPES AND SIZES, U.S. Provisional Patent Application Ser. No. 63/282,740 filed Nov. 24, 2021 entitled BANDAGE WITH ADHESIVE LAYER HAVING VARYING PERFORATION SHAPES AND SIZES and U.S. Provisional Patent Application Ser. No. 63/234,504 filed Aug. 18, 2021 entitled BANDAGE WITH ADHESIVE LAYER HAVING VARYING PERFORATION SIZES, the entire content of each of which is incorporated by reference herein.
Filing Document | Filing Date | Country | Kind |
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PCT/US2022/040754 | 8/18/2022 | WO |
Number | Date | Country | |
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63325370 | Mar 2022 | US | |
63282740 | Nov 2021 | US | |
63234504 | Aug 2021 | US |