Wound application with one-way moisture removal function
By using density-differential nonwoven fabric and pore-gradient foam material in wound dressings, one-way drainage of wound exudate is achieved, solving the problem that existing dressings cannot quickly drain exudate, promoting wound healing and preventing infection.
Patent Information
- Application Number
- CN202422547342.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-10-22
AI Technical Summary
Existing foam dressings are difficult to drain exudate quickly in wounds with high exudation, resulting in overhydration of the wound and affecting wound healing.
A wound dressing with unidirectional moisture-wicking function was designed. Polyester and cellulose nonwoven fabrics were used as protective layers. The density difference between the inner and outer layers created a capillary effect. Combined with a foam dressing layer with varying pore size, the exudate was directed out and drained in one direction.
It effectively prevents exudate from soaking the skin, keeps the wound moist, blocks external bacteria from entering, extends the life of the dressing, and promotes wound healing.
Smart Images
Figure CN223555073U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of wound dressings, and more particularly to a wound dressing with one-way moisture discharge. BACKGROUND
[0002] In the way of repairing and healing skin wounds, if the wound belongs to the non-serious trauma type, wound dressing is often used to cover and mask the wound, to avoid infection and deterioration of the exposed wound, and to accelerate the healing of the wound through the wound dressing.
[0003] Some existing foam dressings use the hydrophilicity and porous structure of foam materials to achieve adsorption of wound exudate. For high exudate wounds, the foam dressing cannot achieve rapid discharge of exudate, and after absorbing the effusion, the wound is easily repeatedly soaked in the exudate in an over-hydrated state, affecting the repair of the wound surface.
[0004] To solve the above problems, the present application provides a wound dressing with one-way moisture discharge. Practical new type content
[0005] The wound dressing with one-way moisture discharge provided by the present application adopts the following technical solution:
[0006] A wound dressing with one-way moisture discharge, comprising a protective layer, the bottom end of the protective layer is provided with a adhesive layer, the bottom end of the adhesive layer is provided with a foam dressing layer, the bottom end of the foam dressing layer is provided with a release layer, the left and right side walls of the adhesive layer are both fixedly connected with two adhesive strips, the bottom end of the adhesive strip is movably attached with a pre-removal layer, and the two pre-removal layers on the same side of the adhesive layer are connected by an extension strip, and the periphery of the protective layer is provided with two protective sleeves, and each protective sleeve is fixedly connected with an extension strip.
[0007] Through the above technical solution, the wound can be covered and protected by the foam dressing layer during use.
[0008] Further, the protective layer is a non-woven fabric made of polyester and cellulose by a spinning process in the prior art, and the fiber density of one side of the non-woven fabric close to the foam dressing layer is larger, and the fiber density of the other side is smaller.
[0009] Through the above technical solution, in the use process, the inner and outer layers of the non-woven fabric have a pressure difference and a capillary effect, and the moisture in the non-woven fabric will automatically spread from the inside to the outside. When the wound exudate reaches the upper layer of the dressing, the protective layer will discharge part of the moisture, prolonging the service life of the dressing.
[0010] Further, the adhesive layer is made of hot melt pressure sensitive adhesive, polyacrylate pressure sensitive adhesive, polyurethane pressure sensitive adhesive or silicone gel, etc., with a square meter gram weight of 10g / m2~100g / m2, and a coating thickness of the adhesive layer controlled between 5um and 20um, and a through hole is punched on the adhesive layer to increase the contact area of the protective layer and the dressing layer, with a diameter of 1mm~3mm, and a ratio of the area of the through hole to the area of the adhesive layer greater than or equal to one half.
[0011] Through the above technical solution, the exudate absorbed by the dressing layer can be conveniently absorbed and discharged in one direction.
[0012] Further, the foam dressing layer is made of foam material with gradient change in pore size, and the gradient arrangement of the pore size in the foam forms a capillary effect to realize the directional discharge of the wound exudate, and the material of the foam material can be selected from polyurethane, soft polysilicone, polyvinyl alcohol, alginate, cellulose sponge, etc., and the foam dressing with gradient arrangement of pore size is made by foaming, electrospinning, 3D printing and other processes, with a foam thickness of 2mm~5mm, a pore size range of 1um~200um, a pore size of 50um~200um on the side in contact with the skin, and a pore size of 1um~20um on the outer side, so that obvious differential capillary effect is formed to realize the one-way discharge of the exudate.
[0013] Through the above technical solution, in the use process, the exudate can be better absorbed and locked on the side away from the skin, without soaking the skin.
[0014] Further, the release layer, the pre-removal layer and the protective sleeve are made of paper or film, such as GraSin release paper, CCK release paper, PET film, PE film, etc., with a square meter gram weight of 40g / m2~120g / m2.
[0015] Through the above technical solution, the foam dressing layer and the adhesive strip can be protected when the wound dressing is not used.
[0016] In summary, the present application has the following beneficial technical effects:
[0017] The side of the foam dressing layer in contact with the wound has a larger pore size, which is conducive to the absorption and transmission of exudate, prevents excessive hydration of the skin at the wound caused by low water adsorption efficiency, and affects the healing of the wound. The other side has a smaller pore size and a relatively large contact area with the exudate, so that the exudate can be better absorbed and locked on the side away from the skin, without soaking the skin. Moreover, since the dressing has a one-way moisture guiding function, the exudate is conducted from the inner layer to the outer layer, and the sweat on the outer side is not easy to enter the inside of the dressing, effectively blocking the invasion of external bacteria, quickly absorbing the exudate, maintaining the moisture of the wound surface, and preventing the exudate from soaking the skin around the wound. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is a schematic view of the overall structure of the present application;
[0019] Figure 2 is a schematic view of the local structure of the present application;
[0020] Figure 3 is a schematic view of the protective sleeve structure of the present application.
[0021] Explanation of Reference Numerals in Drawings:
[0022] 1, protective layer; 2, adhesive layer; 3, foam dressing layer; 4, release layer; 5, protective sleeve; 6, adhesive strip; 7, extension strip; 8, pre-removal layer. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application; obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor fall within the scope of protection of the present application.
[0024] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0025] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be understood broadly, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.
[0026] Embodiment:
[0027] The present application discloses a wound dressing with one-way moisture discharge function, please refer to Figure 1 , Figure 2 , Figure 3, including the protective layer 1, the bottom end of the protective layer 1 is provided with the adhesive layer 2, the bottom end of the adhesive layer 2 is provided with the foam dressing layer 3, the bottom end of the foam dressing layer 3 is provided with the release layer 4, the left and right two side walls of the adhesive layer 2 are fixedly connected with two adhesive strips 6, the bottom end of the adhesive strip 6 is paved with pressure-sensitive adhesive, so that it can be adhered to the human skin, the position of the wound dressing is fixed, the bottom end of the adhesive strip 6 is movably attached with a pre-removal layer 8, and the two pre-removal layers 8 located on the same side of the adhesive layer 2 are connected through the extension strip 7, the periphery of the protective layer 1 is provided with two protective sleeves 5, and the single protective sleeve 5 is fixedly connected with one extension strip 7, and the middle section of the release layer 4 needs to be disconnected into two pieces and fixedly connected with one protective sleeve 5.
[0028] Please refer to Figure 1 、 Figure 2 、 Figure 3 , the protective layer 1 is made of polyester and cellulose in the prior art by a spinning process to form a non-woven fabric, and the fiber density of the side of the non-woven fabric close to the foam dressing layer 3 is larger, and the density of the other side is smaller, there is a pressure difference and capillary effect between the inner and outer layers of the non-woven fabric, and the moisture in the non-woven fabric will automatically spread from inside to outside, when the wound exudate reaches the upper layer of the dressing, the protective layer 1 will discharge part of the moisture, prolonging the service life of the dressing.
[0029] Please refer to Figure 1 、 Figure 2 、 Figure 3 , the adhesive layer 2 is made of hot melt pressure-sensitive adhesive, polyacrylate pressure-sensitive adhesive, polyurethane pressure-sensitive adhesive or silicone gel, etc., the square meter gram weight thereof is between 10g / m2~100g / m2, the coating thickness of the adhesive layer is controlled between 5μm~20μm, and the through hole is punched on the adhesive layer 2 to increase the contact area of the protective layer 1 and the foam dressing layer 3, the diameter of the through hole is controlled between 1mm~3mm, the ratio of the area of the through hole to the area of the adhesive layer 2 is greater than or equal to one half, facilitating one-way absorption and discharge of the exudate absorbed by the dressing layer.
[0030] Please refer to Figure 1 、 Figure 2 、 Figure 3, the foam dressing layer 3 is composed of a foam material with a gradient change in pore size, and the gradient arrangement of the pore size inside the foam forms a capillary effect to realize the directional export of wound exudate. The side of the foam dressing layer 3 in contact with the wound has a larger pore size, which is conducive to the absorption and transmission of exudate, prevents excessive hydration of the skin at the wound site due to low moisture adsorption efficiency, and affects the healing of the wound. The other side has a smaller pore size and a relatively large contact area with the exudate, so that it can better absorb the exudate and lock the exudate away from the skin, without soaking the skin. Moreover, due to the one-way wetting function of the dressing, the exudate is conducted from the inner layer to the outer layer, and the sweat and the like on the outside are less likely to enter the inside of the dressing, effectively preventing the invasion of external bacteria. The foam material can be selected from polyurethane, soft silicone, polyvinyl alcohol, alginate, cellulose sponge, etc. The foam dressing with a gradient arrangement of pore sizes is made by foaming, electrospinning, 3D printing, etc. The thickness of the foam is between 2mm and 5mm, the pore size range is between 1μm and 200μm, the pore size on the skin side is between 50μm and 200μm, and the outer side pore size is between 1μm and 20μm, which can form a clear differential capillary effect to realize the one-way discharge of exudate. During use, it can better absorb the exudate and lock the exudate away from the skin, without soaking the skin.
[0031] Please refer to Figure 1 、 Figure 2 、 Figure 3 , the release layer 4, the pre-removal layer 8 and the protective sleeve 5 are made of paper or film, such as GraSin release paper, CCK release paper, PET film, PE film, etc. The square meter weight is between 40g / m2 and 120g / m2, which is convenient for protecting the foam dressing layer 3 and the adhesive strip 6 when the wound dressing is not used.
[0032] The implementation principle of the embodiment is as follows: when the wound dressing is used, first hold both protective sleeves 5 with both hands and pull the two protective sleeves 5 away from each other, that is, the release layer 4 can be pulled off from the foam dressing layer 3. At this time, the pre-removal layer 8 is synchronized with the adhesive strip 6, and then the foam dressing layer 3 is attached to the wound and the skin through the adhesive strip 6, so that the wound can be dressed.
[0033] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application. Therefore, any equivalent changes made in structure, shape and principle according to the present application should be covered within the protection scope of the present application.
Claims
1. A wound dressing with unidirectional moisture discharge, comprising a protective layer (1), characterized in that: The bottom end of the protective layer (1) is provided with a sticking layer (2), the bottom end of the sticking layer (2) is provided with a foam dressing layer (3), the bottom end of the foam dressing layer (3) is provided with a release layer (4), the left and right side walls of the sticking layer (2) are fixedly connected with two sticky strips (6), the bottom end of the sticky strip (6) is movably attached with a pre-removal layer (8), and the two pre-removal layers (8) on the same side of the sticking layer (2) are connected by an extension strip (7), and the periphery of the protective layer (1) is provided with two protective sleeves (5), and each protective sleeve (5) is fixedly connected with an extension strip (7).
2. A wound dressing with one-way moisture vapor transport according to claim 1, characterized in that: The protective layer (1) is made of polyester and cellulose in the prior art by a spinning process to form a non-woven fabric, and the fiber density of one side of the non-woven fabric close to the foam dressing layer (3) is larger, and the density of the other side is smaller.
3. A wound dressing with one-way moisture vapor transport according to claim 1, wherein: The sticking layer (2) is made of hot melt pressure sensitive adhesive, polyacrylate pressure sensitive adhesive, polyurethane pressure sensitive adhesive or silicone gel, etc., the square meter gram weight is between 10g / m2~100g / m2, the coating thickness of the sticking layer is controlled between 5μm~20μm, and the contact area of the protective layer (1) and the foam dressing layer (3) is increased by punching a hole in the sticking layer (2), the diameter of the through hole is controlled between 1mm~3mm, and the ratio of the area of the through hole to the area of the sticking layer (2) is greater than or equal to one half.
4. The wound dressing with one-way moisture discharge according to claim 1, characterized in that: The foam dressing layer (3) is made of foam material with gradient change in pore size, and the gradient arrangement of the pore size inside the foam forms a capillary effect to realize directional discharge of wound exudate, and the material of the foam material can be selected from polyurethane, soft silicone, polyvinyl alcohol, alginate, cellulose sponge, etc., and the foam dressing with gradient arrangement of pore size is made by foaming, electrospinning, 3D printing and other processes, the foam thickness is between 2mm~5mm, the pore size range is between 1μm~200μm, the pore size on the skin side is between 50μm~200μm, and the pore size on the outside is between 1μm~20μm, which can form obvious differential capillary effect to realize one-way discharge of exudate.
5. A wound dressing with one-way moisture vapor transport according to claim 1, wherein: The release layer (4), the pre-removal layer (8) and the protective sleeve (5) are made of paper or film, such as Glastin release paper, CCK release paper, PET film, PE film, etc., and the square meter gram weight is between 40g / m2~120g / m2.