A frame dressing that incorporates ointment

Abstract

This invention discloses a medicated ointment-integrated frame dressing, comprising a backing layer and a dressing core layer distributed vertically. The dressing core layer includes, from top to bottom, an absorbent layer, a drainage layer, and a frame-type substrate layer. The frame-type substrate layer consists of a frame surface layer, a frame middle layer, and a frame bottom layer. The frame middle layer is a linear frame structure with longitudinal support, used to connect the frame surface layer and the frame bottom layer. The frame surface layer has a mesh shape with perforations. The frame bottom layer, near the drainage layer, allows exudate to pass through. The frame middle layer also has several interconnected large mesh spaces, which communicate with the mesh holes of the frame surface layer, allowing the ointment to enter these large mesh spaces through the mesh holes. This invention can be used to cover wounds with medicated ointment. The ointment entering the frame-type substrate layer softens under the influence of skin temperature and can be effectively and continuously released back into the wound, improving the therapeutic effect of the ointment on the wound.

Description

Technical Field

[0001] This invention relates to the field of medical dressings, and in particular to a frame dressing that incorporates a medicated ointment. Background Technology

[0002] Medical dressings are medical materials used to cover sores, wounds, or other injuries. When used, medical dressings are applied to the wound to protect it from bacterial infection and absorb exudate, preventing it from overflowing and causing other problems.

[0003] Burn ointment is a viscous, oily ointment. In clinical use, if the amount applied is too small, the therapeutic effect cannot be guaranteed. A thickness of 1-2 mm is required. The ointment's structure consists of plant oils and beeswax distributed in a three-dimensional mesh (i.e., a mesh-like framework structure composed of beeswax containing several grooves, each encapsulating oil droplets, with other medicinal components encapsulated within these droplets). This creates a physiologically moist and breathable barrier environment, allowing for slow release of the ointment and the exudate to be expelled, ensuring therapeutic efficacy. However, this thickness of burn ointment is easily washed away by friction from clothing or external sources, preventing it from remaining on the wound for an extended period. Therefore, we need to use medical dressings as a fixation device.

[0004] Chinese utility model patent specification discloses a silicone foam dressing (authorization announcement number: CN205729614U), which includes the following structure: a thin film layer, a silicone gel layer, and a dressing core layer; after the edges of the thin film layer and the silicone gel layer are bonded together, the dressing core layer is placed between the thin film layer and the silicone gel layer; the dressing core layer sequentially includes an absorbent layer, a diversion layer, and a polyurethane foam layer; the absorbent layer is located on one side of the thin film layer, and the polyurethane foam layer is located on one side of the silicone gel layer. The aforementioned silicone foam dressing has good exudate absorption and good adhesion, but also good absorption of burn ointment applied to the wound. If the aforementioned silicone foam dressing is used as a fixation device for burn ointment, since polyurethane foam generally has a porous structure, after the silicone foam dressing comes into contact with the burn ointment, the burn ointment will be quickly absorbed into the dressing core layer along with the exudate and locked in the dressing core layer. Since the burn ointment is relatively viscous and oily, the burn ointment locked in the dressing core layer will not be easily released back to the wound, which will affect the duration of action and therapeutic effect of the burn ointment on the wound.

[0005] For example, some medical dressings on the market still use perforated foam as the core layer. Both polyurethane foam and perforated foam generally have a dense pore structure. In this structure, there are many pores arranged densely, separated by pore walls, and containing a certain number of open pores connected to the outside. When the dressing core layer is applied to a wound covered with burn ointment, the dense pore structure exerts an adsorption force on the burn ointment, drawing it into the dressing core layer. Once the burn ointment is absorbed into this non-linear structure, it becomes trapped within the pores, preventing it from being easily and continuously released back into the wound, thus affecting the treatment effect. Simultaneously, the foam pores also absorb a large amount of burn ointment, preventing its full release into the wound.

[0006] For example, some medical dressings on the market use non-woven cotton cores as the dressing core layer; although non-woven cotton cores do not have a foam structure, they have pores in the non-woven cotton fibers, and burn ointment will be absorbed into the non-woven cotton fibers and thus cannot be released.

[0007] Meanwhile, the three-dimensional network structure of plant oils and beeswax in burn ointments is relatively fragile, easily collapsing or breaking under slight pressure. Once this structure is damaged, it adversely affects the formation of a physiologically moist and breathable barrier environment, ultimately impacting the therapeutic effect of the burn ointment on the wound. However, both the dense pore structure and the pores of non-woven cotton fibers exert a certain adsorption force on the burn ointment upon contact. This adsorption force, when acting on the burn ointment, may also cause damage to the structure formed by the plant oils and beeswax, such as breakage or deformation of the beeswax framework. Summary of the Invention

[0008] (a) Technical problems to be solved

[0009] The purpose of this invention is to provide a frame dressing that incorporates ointment, thereby solving the technical problem in the prior art where, when using medical dressings with polyurethane foam, perforated foam, non-woven cotton, or other materials as the core layer to cover the wound, the ointment is easily locked in the core layer and difficult to release, and the ointment structure (such as burn ointment) is easily damaged.

[0010] (II) Technical Solution

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] A frame dressing incorporating an ointment includes an upper and lower backing layer and a dressing core layer; the backing layer covers the upper surface and periphery of the dressing core layer.

[0013] The dressing core layer includes an absorbent layer, a diversion layer, and a frame-type substrate layer; the absorbent layer, diversion layer, and frame-type substrate layer are distributed sequentially from top to bottom;

[0014] The frame-type substrate layer consists of a frame surface layer, a frame middle layer, and a frame bottom layer; the frame middle layer is located between the frame surface layer and the frame bottom layer, and is a linear frame structure with longitudinal support, used to connect the frame surface layer and the frame bottom layer; the frame surface layer has a grid shape with mesh holes; the frame bottom layer is located near the drainage layer, allowing seepage to pass through;

[0015] The middle layer of the frame also has several interconnected large grid spaces for containing ointment, and these large grid spaces are connected to the grid holes on the surface of the frame; the ointment enters the large grid spaces from the grid holes on the surface of the frame.

[0016] Furthermore, the frame-type substrate layer is a woven mesh fabric made of fibers woven in one go by a warp knitting machine; the middle layer of the frame is made of fibers with elastic support; and the bottom layer of the frame is a mesh shape with mesh holes or a densely woven flat surface.

[0017] Furthermore, the large grid space is open on the side near the surface of the frame; the opening of the large grid space is vertically aligned with and communicates with the grid holes on the surface of the frame, allowing the ointment to quickly and accurately enter the large grid space through the grid holes on the surface of the frame.

[0018] Furthermore, the guide layer is made of breathable natural or synthetic polymer fibers that are extruded and hot-pressed onto a microporous membrane, and has the functions of breathability, drainage and oil repellency.

[0019] Furthermore, the pore size of the micropores on the microporous membrane ranges from 0.01µm to 5µm.

[0020] Furthermore, the absorbent layer is composed of one or more of the following: polyurethane, polyvinyl alcohol sponge, chitosan sponge, silk protein sponge, and superabsorbent cotton core.

[0021] Furthermore, the backing layer is composed of one or more of polyurethane film, polyethylene, and spunlace fabric.

[0022] Furthermore, the depth of the large grid space is 1-2 mm.

[0023] Furthermore, it also includes a release film layer, which covers one side of the frame surface layer.

[0024] Furthermore, it also includes a gel layer and a release film layer; after the backing layer is bonded to the edge of the gel layer, the dressing core layer is placed between the backing layer and the gel layer; the release film layer covers the gel layer.

[0025] Furthermore, the gel layer is a mesh-like gel layer.

[0026] (III) Beneficial Effects

[0027] Compared with the prior art, the present invention provides a frame dressing that incorporates ointment, which has the following beneficial effects:

[0028] (1) The frame-type substrate layer consists of a frame surface layer, a frame middle layer, and a frame bottom layer; the frame middle layer is a linear frame structure with longitudinal support, used to connect the frame surface layer and the frame bottom layer; the frame surface layer has a grid shape with mesh holes; the frame bottom layer is located near the drainage layer, allowing exudate to pass through. The frame middle layer, being a linear frame structure with longitudinal support, forms structural support and simultaneously divides the space between the frame surface layer and the frame bottom layer into a connected structure. Within the linear frame structure of the frame middle layer, there are also several interconnected large mesh spaces for accommodating the ointment.

[0029] After the frame dressing is applied to the wound, the ointment applied to the wound will enter the large grid space through the mesh pores of the frame surface. At the same time, the periphery of the large grid space has a linear structure, and the large grid spaces are interconnected through the linear structure. Compared with the dense pore structure, the linear structure of the frame middle layer has a relatively small adsorption effect on the ointment. The ointment that enters the large grid space will not be locked in the dressing core layer and difficult to release as it would be in the dense pore structure. When the ointment (such as burn ointment) softens due to the influence of skin temperature, it can be fully released back into the wound from between the frame surface and the frame bottom layer.

[0030] Meanwhile, since the middle layer of the frame is a linear frame structure with longitudinal support, after the ointment enters the large grid space, the periphery of the large grid space is supported longitudinally by the linear frame structure, which can better prevent the collapse of the large grid space and provide a more stable space for containing the ointment, thereby effectively avoiding excessive damage or collapse of the ointment structure in the large grid space.

[0031] (2) At the same time, unlike the dense pore structure, the linear framework layer has relatively less adsorption force on the ointment. Therefore, the ointment structure of the ointment (such as burn ointment) will be less damaged by the adsorption force.

[0032] When applying a frame dressing to a wound with ointment, the ointment that penetrates into the middle layer of the frame will be in a linear structure and will not be subject to the resistance of the pore walls, as is the case with dense foam structures.

[0033] (3) In this invention, the absorbent layer in the dressing core layer has a good function of absorbing exudate and also has a good liquid-locking function, which can fix the absorbed exudate in the absorbent layer and prevent exudate.

[0034] (4) In this invention, the diversion layer is made of breathable natural or synthetic polymer fibers that are extruded and hot-pressed onto a microporous membrane, providing breathability, drainage, and oil repellency. Located between the absorbent layer and the frame-type substrate layer, the diversion layer prevents the ointment in the frame-type substrate layer from being absorbed by the absorbent layer, especially when the bottom layer of the frame has a mesh shape with pores. This prevents the ointment filled in the frame-type substrate layer from being rapidly absorbed by the absorbent layer after contact with it under rapid pressure, thus ensuring that a relatively sufficient amount of ointment is continuously released towards the wound surface after softening and remains on the wound surface, ensuring that the ointment continues to exert its effect on the wound for a long time.

[0035] Meanwhile, the drainage layer contains breathable fibers, allowing exudate to be easily guided along these fibers to the absorbent layer, thus accelerating the drainage of exudate from the wound. The microporous structure of the microporous membrane also ensures excellent breathability, preventing ointment from penetrating while allowing exudate to pass through quickly, providing a physiological healing environment for the wound.

[0036] (5) In this invention, the combination of the frame-type substrate layer, the drainage layer with breathable drainage and oil-repellent function, and the absorbent layer in the dressing core layer forms a complete system for wound treatment. This provides an overall feasible solution for treating wounds in clinical practice, which preserves the structure of the ointment, ensures full-layer contact with the wound, drains exudate, locks in exudate, and ensures breathability, thereby reducing the need for repeated administration. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of the frame dressing combined with the ointment in this invention.

[0038] Figure 2 Is Figure 1 A bottom view of the frame dressing after removing the release film layer.

[0039] Figure 3 Is Figure 1 A schematic diagram of the framework dressing with an added gel layer.

[0040] Figure 4 yes Figure 3 A bottom view of the frame dressing after removing the release film layer.

[0041] Figure 5 This is a schematic diagram of the structure of the frame-type substrate layer in the frame dressing of the present invention. Figure 1 .

[0042] Figure 6This is a schematic diagram of the structure of the frame-type substrate layer in the frame dressing of the present invention. Figure 2 .

[0043] Figure 7 This is an image showing the effect of the frame dressing in this invention applied to burn ointment.

[0044] Figure 8 This image shows the effect of a silicone gel foam dressing applied to burn ointment.

[0045] Figure 9 This image shows the effect of a non-woven cotton core dressing applied to burn ointment.

[0046] In the picture:

[0047] 10-Backing layer, 21-Absorbent layer, 22-Flow guiding layer, 23-Frame type substrate layer, 231-Frame surface layer, 232-Frame middle layer, 233-Frame bottom layer, 30-Gel layer, 40-Release film layer. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0049] Example 1:

[0050] like Figure 1-2 As shown, a frame dressing with an ointment is provided, including a backing layer 10 and a dressing core layer distributed vertically; the backing layer 10 covers the upper surface and periphery of the dressing core layer.

[0051] The dressing core layer includes an absorbent layer 21, a diversion layer 22, and a frame-type substrate layer 23; the absorbent layer 21, the diversion layer 22, and the frame-type substrate layer 23 are distributed sequentially from top to bottom.

[0052] Preferably, the backing layer 10 is composed of one or more of polyurethane film, polyethylene, and spunlace fabric. For example, the backing layer 10 can be made of a single polyurethane film material, or it can be formed by stacking polyurethane film sheets and polyethylene sheets on top of each other. In this embodiment 1, the backing layer 10 is a polyurethane film, which has high air permeability and also serves as a waterproof and antibacterial agent.

[0053] At the same time, such as Figure 1As shown, the backing layer 10 has a larger area than the dressing core layer, covering both the upper and side surfaces of the dressing core layer, thus protecting them. The absorbent layer 21 is directly attached to the lower surface of the backing layer 10, preventing leakage of seepage from the absorbent layer 21. Simultaneously, the back of the backing layer 10 is coated with an adhesive (such as hot melt pressure-sensitive adhesive, solvent-based pressure-sensitive adhesive, silicone pressure-sensitive adhesive, water-based pressure-sensitive adhesive, or silicone gel). The backing layer 10 can be bonded to the dressing core layer at the joint using this adhesive.

[0054] In this embodiment 1, the frame-type substrate layer 23 is a woven mesh substrate made of fibers woven in one piece by a warp knitting machine. Preferably, the fibers can be one or more of the following: PP, PET, and natural fibers.

[0055] In this embodiment 1, the frame-type substrate layer 23 consists of a frame surface layer 231, a frame middle layer 232, and a frame bottom layer 233, as follows: Figure 6 As shown; the frame surface layer 231 is a grid shape with mesh holes; the frame middle layer 232 is located between the frame surface layer 231 and the frame bottom layer 233, and is made of fibers with elastic support (i.e., fibers with fiber elasticity or resilience), and is a linear frame structure with longitudinal support, used to connect the frame surface layer 231 and the frame bottom layer 233; the frame bottom layer 233 is a densely woven flat surface, and when connected, the frame bottom layer 233 is located on one side of the flow guide layer 22.

[0056] When the bottom layer 233 of the frame is made of a densely woven flat surface, the surface layer 231 of the frame will not deform too much, which can strengthen the entire frame-type base material layer 23, while having pores that allow liquid to pass through.

[0057] The middle layer 232 of the frame is a linear frame structure, which is connected between the top layer 231 and the bottom layer 233 of the frame. The upper and lower ends of the linear frame structure are connected to the bottom layer 233 and the top layer 231 of the frame, respectively, and play a certain supporting role in the longitudinal direction. The space between the top layer 231 and the bottom layer 233 of the frame is divided by the linear frame structure and the interior of the space is connected. Specifically, the linear frame structure of the middle layer 232 can be a single-line connection structure, such as the middle layer 232 being composed of several resilient fiber monofilaments connected between the frame surface layer 231 and the frame bottom layer 233. Structurally, the fiber monofilaments can be curved or irregularly curved, with gaps between the fiber monofilaments; or, the linear frame structure of the middle layer 232 can also be composed of several elastic fiber webs connected between the frame surface layer 231 and the frame bottom layer 233. These elastic fiber webs can be woven from resilient fibers and extend longitudinally, with gaps between adjacent elastic fiber webs; or, the linear frame structure of the middle layer 232 can also be a three-dimensional mesh structure, such as the middle layer 232 being composed of a three-dimensional mesh structure woven from resilient fiber filaments.

[0058] Preferably, the bottom layer 233 of the frame can also be a grid shape with mesh holes. When the top layer 231 and the bottom layer 233 of the frame are grid shapes with mesh holes, the mesh holes can be circular, elliptical, square, rhomboid, quadrilateral, hexagonal, etc.

[0059] In this embodiment 1, the linear frame structure of the middle layer 232 is made of fibers with elastic support force and has a certain longitudinal support force. It can form a space of a certain thickness between the frame surface layer 231 and the frame bottom layer 233, so that the frame type substrate layer 23 is three-dimensional as a whole.

[0060] In this embodiment 1, a plurality of large grid spaces 230 for containing ointment are uniformly provided between the frame surface layer 231 and the frame bottom layer 233; the large grid spaces 230 are used to provide filling space for ointment and are connected to the grid holes on the frame surface layer 231; the ointment enters the large grid spaces 230 from the grid holes on the frame surface layer 231.

[0061] like Figure 5As shown, a structural schematic diagram of a frame-type substrate layer 23 is provided. This frame-type substrate layer 23 is a woven mesh substrate. The frame surface layer 231 has several large circular mesh holes, and the frame bottom layer 233 is a densely woven flat surface. The frame middle layer 232 is a curved frame structure. Large mesh spaces 230 are located within the linear frame structure of the frame middle layer 232. Curved linear fibers with resilience are located around the periphery of the large mesh spaces 230. Since adjacent large mesh spaces 230 are connected by linear frame structures, and these linear frame structures are not closed, the large mesh spaces 230 are interconnected. Furthermore, as... Figure 5 As shown, the frame surface layer 231 has a mesh structure with large circular mesh holes. The large mesh space 230 is open on the side near the frame surface layer 231. The size of the opening of the large circular mesh hole is the same as the size of the opening of the large mesh space 230. The large circular mesh hole on the frame surface layer 231 and the opening of the large mesh space 230 are longitudinally aligned and connected. The mesh hole on the frame surface layer 231 and the large mesh space 230 are combined in the frame-type substrate layer 23 to form a concave three-dimensional space. The ointment can quickly and accurately enter the large mesh space 230 through the large circular mesh hole on the frame surface layer 231. When used in conjunction with burn ointment, when the mesh hole of the frame surface layer 231 is as shown... Figure 5 The large circular mesh hole shown can be designed to have a diameter of 2mm-8mm.

[0062] exist Figure 5 Based on this, by changing the shape of the mesh holes on the frame surface layer 231 and the opening shape of the large mesh space 230 to rhombus, it becomes the frame-type substrate layer 23 in this embodiment 1. In embodiment 1, the area of ​​the mesh holes on the frame surface layer 231 is 9 square millimeters, the depth of the large mesh space 230 is 2 mm, and the depth of the concave three-dimensional space formed by the combination of the mesh holes on the frame surface layer 231 and the large mesh space 230 is 2.5 mm. This frame dressing can be used in conjunction with ointments, especially with viscous oily ointments such as burn ointments (e.g., burn ointments containing sesame oil and beeswax, where the vegetable oil and beeswax are distributed in a three-dimensional mesh structure). In Example 1 above, a certain thickness of burn ointment can be filled into the concave three-dimensional space, achieving a burn ointment application thickness of 1-2 mm above the wound surface. Simultaneously, the burn ointment structure within the concave three-dimensional space remains relatively intact, enabling continuous release of the ointment and thus better exerting its therapeutic effect on the wound. Of course, different ointments have different requirements for application thickness to achieve their efficacy. Therefore, when weaving the frame-type substrate layer 23, the size of the concave three-dimensional space can be adjusted accordingly based on the specific required application thickness.

[0063] Preferably, when both the frame surface layer 231 and the frame bottom layer 233 are mesh-shaped with mesh holes, the mesh holes on the frame bottom layer 233 and the mesh holes on the frame surface layer 231 can be located at the upper and lower ends of the large mesh space 230. The upper and lower ends of the large mesh space 230 are connected to the mesh holes on the frame bottom layer 233 and the mesh holes on the frame surface layer 231. The three together form a three-dimensional space that is connected at both ends (for example, a three-dimensional space similar to a cylinder that is connected at both ends) in the frame-type substrate layer 23. After the ointment enters from the mesh holes of the frame surface layer 231 and fills the three-dimensional space that is connected at both ends, the ointment can form a certain filling thickness in the frame-type substrate layer 23.

[0064] When the frame dressing is applied to the wound covered with burn ointment, the frame surface 231 faces downwards and adheres to the burn ointment applied to the wound. The burn ointment will enter several interconnected large grid spaces 230 through the mesh holes of the frame surface 231. At the same time, since the frame middle layer 232 is a linear frame structure with longitudinal support, after the burn ointment enters the large grid spaces 230, the periphery of the large grid spaces 230 is supported longitudinally by the linear frame structure, which can better prevent the large grid spaces 230 from collapsing, thereby effectively avoiding damage or collapse of the ointment structure within the large grid spaces 230.

[0065] The large mesh space 230 is a three-dimensional space region between the frame surface layer 231 and the frame bottom layer 233, providing space for the ointment to fill the interior of the frame-type substrate layer. Between two adjacent large mesh spaces 230 is a linear frame structure of the frame middle layer 232, and the periphery of the large mesh space 230 is a linear structure, with each large mesh space 230 interconnected through these linear structures. Compared to a dense pore structure, the linear frame middle layer 232 has a relatively smaller adsorption effect on burn ointment. Therefore, burn ointment entering the large mesh space 230 is not as tightly locked in the dressing core layer and difficult to release as it would be in a dense pore structure; as the burn ointment softens due to skin temperature, it can be continuously and slowly released again from between the frame surface layer 231 and the frame bottom layer 233 towards the wound surface.

[0066] Furthermore, unlike dense pore structures, the large mesh space 230 has relatively less adsorption force on the burn ointment, so the ointment structure will be less damaged due to the adsorption force, and the ointment structure of the burn ointment filled in the large mesh space 230 can be better protected.

[0067] In this embodiment 1, the frame-type substrate layer 23 is a woven mesh substrate made of PET fiber woven in one piece by a warp knitting machine, and does not have a dense cellular structure. When weaving the frame-type substrate layer 23, we can minimize the spacing between two adjacent mesh holes on the frame surface layer 231 to avoid excessive compression of the burn ointment by the fiber surface area between two adjacent mesh holes on the frame surface layer 231 when the frame dressing is applied to the wound. This prevents a large amount of the burn ointment structure from being destroyed by such compression. At the same time, since the frame middle layer 232 is a linear frame structure, the connection point between the frame middle layer 232 and the frame surface layer 231 is relatively small. When weaving this frame-type substrate layer 23, we can also choose to minimize the spacing between two large mesh spaces 230 to form relatively large large mesh spaces 230. This ensures that there is relatively sufficient space for the burn ointment to fill the interior of the frame-type substrate layer, providing a framework space for the continuous and slow release of the burn ointment. Furthermore, minimizing the spacing between two adjacent mesh holes on the frame surface layer 231 helps to appropriately increase the orifice area of ​​the mesh holes on the frame surface layer 231 while keeping the overall size and number of mesh holes constant. This, combined with a relatively large mesh space 230, allows the burn ointment to quickly and fully fill the frame-type substrate layer 23 when the frame dressing is applied to the wound surface covered with burn ointment, thereby reducing the amount of burn ointment that is squeezed outwards from the wound surface during the covering process.

[0068] We selected two common medical dressings from the market: silicone gel foam dressing and non-woven cotton core dressing, and compared their effects with the frame dressing in Example 1. We first applied a certain amount of burn ointment to the back of the hand, then covered the burn ointment with the frame dressing and pressed it slightly, forming a shape as shown in the image. Figure 7 The effect shown; then, wipe the back of the hand clean, and apply the same amount of burn ointment a second time to the same area in the same manner. Next, cover the burn ointment with a silicone gel foam dressing and press it in slightly to form a layer as shown. Figure 8 The effect shown; then, wipe the back of the hand clean, and apply the same amount of burn ointment a third time to the same area in the same manner. Next, cover the burn ointment with a non-woven cotton dressing and press gently to form a shape as shown. Figure 9 The effect is shown. In the three covering and pressing processes described above, we used almost the same pressing pressure and pressed in the same direction.

[0069] like Figure 7 As shown, the burn ointment was not dispersed outwards, and its structure was minimally damaged, especially the ointment structure within the large grid space 230, which remained relatively intact. Figure 8 and Figure 9As shown, the burn ointment is squeezed outwards, and in the process of being squeezed outwards, the ointment structure is severely damaged.

[0070] In this embodiment 1, the frame-type substrate layer 23 is woven in one go using a fiber warp knitting machine, and the frame middle layer 232 has a linear structure. When the burn ointment is applied to the wound by covering and pressing with the frame dressing, the burn ointment entering the frame middle layer 232 will be in the linear structure and will not be blocked by the pore walls of the dense foam structure.

[0071] Preferably, the absorbent layer 21 can be formed from one or more of the following: polyurethane, polyvinyl alcohol foam, chitosan foam, silk protein foam, and superabsorbent cotton core. For example, the absorbent layer 21 can be made from a single superabsorbent cotton core material, or it can be formed by stacking sheet-like hydrophilic polyurethane foam and sheet-like polyvinyl alcohol foam, or by combining polyvinyl alcohol foam and chitosan foam, or by combining chitosan foam and superabsorbent cotton core. In this embodiment 1, the absorbent layer 21 is made of superabsorbent cotton core, which can lock in the seepage.

[0072] Preferably, the diversion layer 22 can be prepared by latitude and longitude extrusion and hot pressing of breathable natural or synthetic polymer fibers onto a microporous membrane, providing breathability, drainage, and oil repellency. The microporous membrane is made by calendering, extrusion, biaxial stretching, or other methods. In this embodiment 1, the microporous membrane in the diversion layer 22 is a polytetrafluoroethylene microporous membrane with a pore size of 5 μm. The microporous membrane is located on one side of the frame-type substrate layer 23, and the breathable fibers in the diversion layer 22 are located on one side of the absorbent layer 21. Simultaneously, due to the small pore size of the microporous membrane, oily substances in the burn ointment can be prevented from passing through, thus achieving an oil-repellent effect.

[0073] The diversion layer 22 is located between the absorbent layer 21 and the frame-type substrate layer 23. It can prevent the burn ointment from directly adhering to the absorbent layer 21 and being absorbed by the absorbent layer 21, ensuring that the burn ointment is filled in the frame-type substrate layer 23 and can be continuously released and remain on the wound surface, so that the burn ointment can play a continuous role on the wound for a long time.

[0074] Simultaneously, the drainage layer 22 serves both to allow for air permeability and to drain exudate. Containing breathable fibers, the drainage layer 22 allows exudate to be easily drained along these fibers into the absorbent layer 21, thus accelerating the drainage of exudate from the wound. Furthermore, the drainage layer 22 has an oil-repellent effect, preventing oil from the burn ointment from seeping into the absorbent layer 21, thereby reducing the effectiveness and efficacy of the ointment. The microporous structure of the microporous membrane also ensures excellent air permeability, allowing exudate to pass through quickly while preventing ointment from penetrating, providing a physiological healing environment for the wound.

[0075] In Example 1, a release film 40 is also included. Preferably, the release film 40 can be a milky white PE film, PP film, or embossed film (PP or PE). The release film 40 includes a bottom release film and a folded release film, with one end of the folded release film having a folded edge formed after folding. The bottom release film covers a portion of the frame-type substrate layer 23, and the folded release film covers another portion of the frame-type substrate layer 23, with a portion of the folded edge located above the bottom release film. The backing layer 10 and the release film 40 are bonded together by adhesive applied to the backing layer 10.

[0076] In this invention, the combination of the frame-type substrate layer 23, the drainage layer 22 with breathable, draining, and oil-repellent functions, and the absorbent layer 21 in the dressing core layer forms a complete system for wound treatment. This provides a feasible overall solution for clinical wound treatment that preserves the ointment structure, ensures full-layer contact with the wound, drains and locks in exudate, and guarantees breathability, reducing the need for repeated medication administration. Simultaneously, after the required medication thickness is achieved in this frame dressing, the ointment can be released relatively fully again, thus better exerting its therapeutic effect on the wound.

[0077] Example 2:

[0078] We added a gel layer 30 to the structure of Example 1, thereby forming Example 2. The specific structure of Example 2 is as follows: Figure 3 and Figure 4 As shown. Meanwhile, unlike Example 1, in Example 2, the backing layer 10 is a glued hydroentangled fabric, the pore size of the micropores on the microporous membrane is 0.01um, the frame-type substrate layer 23 is a woven mesh substrate made of bamboo fiber by a warp knitting machine in one go, the frame surface layer 231 and the frame bottom layer 233 are both mesh-shaped with mesh holes, and the depth of the large mesh space 230 is 1mm.

[0079] like Figure 3 and Figure 4 As shown, the gel layer 30 is a perforated mesh-like gel layer. In Example 2, the dressing core layer is placed between the backing layer 10 and the gel layer 30 (Note: the portion of the gel layer 30 covering the frame-type substrate layer 23 is not included). Figure 4 As shown in the figure, the area of ​​the dressing core layer is smaller than the area of ​​the backing layer 10 and the gel layer 30. The dressing core layer is located in the middle of the backing layer 10, and the backing layer 10 is bonded to the periphery of the gel layer 30 to form an adhesive edge.

[0080] The addition of the gel layer 30 helps to better fix the dressing core layer to the backing layer 10, preventing the dressing core layer from slipping off during use; at the same time, the adhesive edge structure also makes the frame dressing more easily fit the wound. In addition, the gel layer 30 can also block exudate in the dressing core layer to a certain extent, reducing the exudate squeezed out from the fiber gaps of the woven mesh frame-type substrate layer 23 towards the wound under pressure, thereby reducing exudate backflow into the wound.

[0081] Preferably, the gel layer 30 can be a mesh-like gel layer formed by perforation of one or more of the following: silicone gel, polyurethane gel, poly(hydroxyethyl methacrylate), etc., and the shape of the holes can be circular, elliptical, square, rhomboid, quadrilateral, or hexagonal.

[0082] Meanwhile, in Example 2, the release film 40 also includes a bottom release film and a folded release film, with one end of the folded release film having a folded edge segment formed after folding. The bottom release film covers a portion of the silicone gel layer 30, and the folded release film covers another portion of the silicone gel layer 30, with a portion of the folded edge segment located above the bottom release film.

[0083] Apart from the differences mentioned above, Embodiment 2 is identical to Embodiment 1 in all other respects.

Claims

1. A frame dressing combined with an ointment, characterized in that: It includes a backing layer and a dressing core layer distributed vertically; the backing layer covers the upper surface and periphery of the dressing core layer; The dressing core layer includes an absorbent layer, a diversion layer, and a frame-type substrate layer; the absorbent layer, diversion layer, and frame-type substrate layer are distributed sequentially from top to bottom; The frame-type substrate layer consists of a frame surface layer, a frame middle layer, and a frame bottom layer; the frame middle layer is located between the frame surface layer and the frame bottom layer, and is a linear frame structure with longitudinal support, used to connect the frame surface layer and the frame bottom layer; the frame surface layer has a grid shape with mesh holes; the frame bottom layer is located near the drainage layer, allowing seepage to pass through; The middle layer of the frame also has several interconnected large grid spaces for containing ointment, and these large grid spaces are connected to the grid holes on the surface of the frame; the ointment enters the large grid spaces through the grid holes on the surface of the frame. The frame-type substrate layer is a woven mesh fabric made of fibers woven in one go by a warp knitting machine; the frame middle layer is made of fibers with elastic support; the frame bottom layer is a mesh shape with mesh holes or a densely woven flat surface; The large grid space is open on the side near the frame surface; the opening of the large grid space is vertically aligned with and communicates with the grid holes on the frame surface, allowing the ointment to quickly and accurately enter the large grid space through the grid holes on the frame surface. The guide layer is made of breathable natural or synthetic polymer fibers that are extruded and hot-pressed onto a microporous membrane, and has the functions of breathability, drainage and oil repellency.

2. The frame dressing combined with ointment according to claim 1, characterized in that: The pore size of the micropores on the microporous membrane ranges from 0.01µm to 5µm.

3. A frame dressing combined with ointment according to claim 2, characterized in that: The absorbent layer is composed of one or more of the following: polyurethane, polyvinyl alcohol sponge, chitosan sponge, silk protein sponge, and super absorbent cotton core.

4. A frame dressing combined with ointment according to claim 3, characterized in that: The backing layer is composed of one or more of polyurethane film, polyethylene, and spunlace fabric.

5. A frame dressing combined with ointment according to claim 4, characterized in that: The depth of the large grid space is 1-2 mm.

6. A frame dressing combined with ointment according to any one of claims 1-5, characterized in that: It also includes a release film layer that covers one side of the frame surface layer.

7. A frame dressing combined with ointment according to any one of claims 1-5, characterized in that: It also includes a gel layer and a release film layer; after the backing layer is bonded to the edge of the gel layer, the dressing core layer is placed between the backing layer and the gel layer; the release film layer covers the gel layer.

8. A frame dressing combined with ointment according to claim 7, characterized in that: The gel layer is a mesh-like gel layer.

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