Alginate dressing
By introducing an activated carbon fiber layer into the alginate dressing, the problems of exudate absorption and evaporation in the existing technology are solved, achieving higher exudate management capabilities, buffering of external pressure and odor adsorption, and improving user comfort.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN AI DOCTOR MEDICAL TECH CO LTD
- Filing Date
- 2025-01-16
- Publication Date
- 2026-04-24
AI Technical Summary
While increasing the thickness of existing alginate dressings can improve their capacity to absorb exudate, it also affects the evaporation of exudate and does not have the function of absorbing odors or buffering external pressure.
An alginate dressing was designed, comprising a fixation layer, an activated carbon fiber layer, and an alginate fiber layer. The activated carbon fiber layer is located between the alginate fiber layer and the fixation layer. The liquid capacity of the dressing is increased by the liquid absorption capacity of the activated carbon fiber layer, and its better evaporation performance is utilized. The thickness of the alginate fiber layer is controlled. The activated carbon fiber layer is not directly connected to the alginate fiber layer to avoid affecting the liquid absorption effect.
It improves the dressing's ability to manage exudate, reduces the frequency of dressing changes, buffers external pressure on the wound, increases comfort, and absorbs odors generated by chronic wounds.
Smart Images
Figure CN224155883U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dressings, and more specifically, to an alginate dressing. Background Technology
[0002] Alginate dressings are medical dressings made from calcium alginate fibers extracted from natural seaweed. Due to their excellent absorbency and biocompatibility, they are widely used in wound care. Alginate dressings have outstanding absorbency, capable of absorbing several times their own weight in exudate, keeping the wound moist while preventing fluid leakage, thus helping to maintain a microenvironment conducive to wound healing. When alginate dressings come into contact with wound exudate, they form a gel-like substance, which helps soften and remove necrotic tissue, thereby accelerating the wound cleaning process and creating conditions for new tissue growth.
[0003] When alginate dressings are used on chronic wounds, such as pressure sores, venous ulcers, and diabetic foot ulcers, these wounds are often accompanied by a large amount of exudate. The dressing's ability to absorb exudate is one of the main reasons determining the frequency of dressing changes. Although increasing the thickness of the dressing can improve its capacity to hold exudate to some extent, the thickness of the alginate gel will also increase, which in turn affects the evaporation of the exudate absorbed by the dressing. Utility Model Content
[0004] The purpose of this invention is to provide an alginate dressing that solves the problem that existing technologies, while ensuring the absorption of exudate, also affect the evaporation of exudate. It also has the functions of absorbing odor from the wound and buffering external pressure.
[0005] The embodiments of this utility model are achieved through the following technical solutions:
[0006] An alginate dressing includes: a fixation layer, an activated carbon fiber layer, and an alginate fiber layer; the activated carbon fiber layer is located between the alginate fiber layer and the fixation layer; the alginate fiber layer completely covers the activated carbon fiber layer; the activated carbon fiber layer is connected to the fixation layer; and the edge of the alginate fiber layer is connected to the fixation layer.
[0007] Preferably, it further includes: a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is located between the activated carbon fiber layer and the fixing layer, the alginate fiber layer includes a contact portion and a protrusion, the contact portion abuts against the activated carbon fiber layer, the orthographic projection of the protrusion toward the fixing layer falls directly on the fixing layer, the protrusion includes a connecting portion, and the second adhesive layer is located between the connecting portion and the fixing layer.
[0008] Preferably, the protrusion is annular; the contact portion is located within the enclosing area of the protrusion and is connected to the protrusion.
[0009] Preferably, the first adhesive layer and the second adhesive layer are connected to each other.
[0010] Preferably, the distance between the contact portion and the fixing layer is greater than the distance between the connecting portion and the fixing layer.
[0011] Preferably, it further includes: a tensile membrane; at least one of the upper and lower bottom surfaces of the alginate fiber layer is covered with the tensile membrane, and the tensile strength of the tensile membrane is greater than that of the alginate fiber layer.
[0012] Preferably, the alginate fiber layer is covered with the tensile membrane on the side closest to the fixing layer.
[0013] Preferably, at least one of the upper and lower bottom surfaces of the activated carbon fiber layer is covered with the tensile film, and the tensile strength of the tensile film is greater than that of the activated carbon fiber layer.
[0014] Preferably, the side of the activated carbon fiber layer closest to the fixing layer is covered with the tensile membrane.
[0015] Preferably, the area of the alginate fiber layer is 0.1-0.95 times the area of the fixed layer, and the area of the activated carbon fiber layer is 0.05-0.9 times the area of the fixed layer.
[0016] This utility model has at least the following beneficial effects:
[0017] This invention places an activated carbon fiber layer between a fixing layer and an alginate fiber layer. The liquid absorption capacity of the activated carbon fiber layer can increase the overall liquid volume of the dressing, while the thickness of the alginate fiber layer can be controlled. Moreover, the activated carbon fiber layer has better evaporation performance than the gel layer, thus improving the dressing's ability to manage exudate and further reducing the frequency of dressing replacement.
[0018] The activated carbon fiber layer is not directly connected to the alginate fiber layer, which avoids the fixation method between the two isolating the activated carbon fiber layer and the alginate fiber layer, thus affecting the liquid absorption effect of the activated carbon fiber layer;
[0019] The activated carbon fiber layer can increase the thickness of the dressing at the wound care site, buffer the external pressure on the wound, and improve the comfort of use;
[0020] The activated carbon fiber layer can absorb the odor produced by chronic wounds. Attached Figure Description
[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the first structure of an alginate dressing.
[0023] Figure 2 for Figure 1 Detailed view of point A in the middle;
[0024] Figure 3 This is a schematic diagram of the second structure of the alginate dressing;
[0025] Figure 4 This is the first front view of the alginate dressing;
[0026] Figure 5 This is a second front view of the alginate dressing;
[0027] Figure 6 This is the third front view of the alginate dressing;
[0028] Icons: 1-Fixing layer, 2-Activated carbon fiber layer, 3-Alginate fiber layer, 31-Contact part, 32-Protrusion, 321-Connecting part, 322-Transition part, 4-First adhesive layer, 5-Second adhesive layer, 6-Tension film, 7-Resistant paper. Detailed Implementation
[0029] To make the objectives, methods, and advantages of the embodiments of this utility model clearer, the methods in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.
[0030] Example 1: As Figure 1-2 As shown, an alginate dressing includes: a fixation layer 1, an activated carbon fiber layer 2, and an alginate fiber layer 3; the activated carbon fiber layer 2 is located between the alginate fiber layer 3 and the fixation layer 1; the alginate fiber layer 3 completely covers the activated carbon fiber layer 2; the activated carbon fiber layer 2 is connected to the fixation layer 1; and the edge of the alginate fiber layer 3 is connected to the fixation layer 1.
[0031] In practical implementation, the fixation layer 1 serves to support and carry the alginate fiber layer 3 and the activated carbon fiber layer 2, playing a crucial role in the dressing structure. It ensures the dressing effectively adheres to the wound and provides necessary physical support. The fixation layer 1 can be made of non-woven fabric, polyurethane film, or self-adhesive polymer film, etc. Ventilation holes can be incorporated into the fixation layer 1 to increase breathability. A release liner 7 can be placed on the side of the alginate fiber layer 3 away from the activated carbon fiber layer 2 to protect the dressing surface and prevent it from contacting the external environment during storage and transportation, avoiding the adhesion of dust, bacteria, and other contaminants. Without the release liner 7, when the dressing is directly exposed to air, its adhesive may prematurely activate and adhere to surrounding objects, affecting ease of use and potentially increasing the risk of secondary injury to the wound. High-quality release liner 7 is typically easy to peel off from the dressing without leaving residue, allowing healthcare professionals or patients to easily apply the dressing to the wound.
[0032] In this embodiment, an activated carbon fiber layer 2 is disposed between the fixation layer 1 and the alginate fiber layer 3. The absorbency of the activated carbon fiber layer 2 increases the overall liquid capacity of the dressing, while the thickness of the alginate fiber layer 3 is controlled. Furthermore, the activated carbon fiber layer 2 has better evaporation performance than the gel layer, improving the dressing's ability to manage exudate and further reducing the frequency of dressing changes. The alginate fiber layer 3 is connected and fixed to the fixation layer 1, preventing the activated carbon fiber layer 2 from directly connecting to the alginate fiber layer 3. This avoids isolating the activated carbon fiber layer 2 and the alginate fiber layer 3, which would affect the absorbency of the activated carbon fiber layer 2. The activated carbon fiber layer 2 increases the thickness of the dressing at the wound site, buffering external pressure on the wound and improving comfort. The activated carbon fiber layer 2 can also absorb odors generated by chronic wounds.
[0033] The size of the fixation layer 1 can be adjusted according to the application site and the size of the wound; this embodiment does not impose specific limitations.
[0034] There are two ways to fix alginate dressings. One is that the alginate dressing itself does not have the function of adhering to the skin, so it is fixed by adding external adhesive tape. The other is to add an adhesive part to the fixing layer 1 and place release paper on the adhesive part. When using, after tearing off the release paper, the dressing can be pasted and fixed to the skin surface through the adhesive part.
[0035] Example 2: To simplify the manufacturing process while ensuring the liquid absorption capacity of the activated carbon fiber layer 2, improvements were made based on Example 1, such as... Figure 1-2As shown, in this embodiment, it further includes: a first adhesive layer 4 and a second adhesive layer 5. The first adhesive layer 4 is located between the activated carbon fiber layer 2 and the fixing layer 1. The alginate fiber layer 3 includes a contact portion 31 and a protrusion 32. The contact portion 31 abuts against the activated carbon fiber layer 2. The orthographic projection of the protrusion 32 toward the fixing layer 1 falls directly onto the fixing layer 1. The protrusion 32 includes a connecting portion 321. The second adhesive layer 5 is located between the connecting portion 321 and the fixing layer 1.
[0036] In specific implementation, the contact portion 31 refers to the part in direct contact between the alginate fiber layer 3 and the activated carbon fiber layer 2. The protrusion 32 refers to the edge portion of the alginate fiber layer 3 protruding from the activated carbon fiber layer 2 on the horizontal plane. The orthographic projection of the protrusion 32 towards the fixing layer 1 directly falling on the fixing layer 1 means that there is no activated carbon fiber layer 2 between the protrusion 32 and the fixing layer 1. In this embodiment, the layers are bonded together so that the alginate dressing can be manufactured directly using existing laminating machines. The edge of the alginate fiber layer 3 is connected to the fixing layer 1 through the second adhesive layer 5, and the binding of the second adhesive layer 5 ensures that the contact portion 31 always remains in contact with the activated carbon fiber layer 2. This not only prevents the contact layer from separating from the activated carbon fiber layer 2, thus avoiding affecting the liquid transfer between the two layers and consequently the absorption of the activated carbon fiber layer 2, but also eliminates the need for the alginate fiber layer 3 to be bonded and fixed to the activated carbon fiber layer 2, preventing the adhesive layer from isolating the two fiber layers and affecting liquid transfer.
[0037] As an example, the alginate fiber layer 3 and the activated carbon layer can be as follows: Figure 4 As shown, it is set as a rectangle. The alginate fiber layer 3 and the activated carbon layer can also be arranged as follows: Figure 5 As shown, it is set to a circle.
[0038] Example 3: To increase the connection stability between the alginate fiber layer 3 and the fixing layer 1, and to prevent the activated carbon fiber layer 2 from being contaminated, improvements were made based on Example 2, such as... Figure 4-5 As shown, in this embodiment, the protrusion 32 is annular; the contact portion 31 is located within the enclosing area of the protrusion 32 and is connected to the protrusion 32.
[0039] In the specific implementation process, when the alginate fiber layer 3 is as follows Figure 6 As shown, when the alginate fiber layer 3 is bonded to the fixing layer 1 along its length, direct connection between the alginate fiber layer 3 and the activated carbon fiber layer 2 can be avoided. However, the alginate fiber layer 3 cannot completely cover the activated carbon fiber layer 2, and the exposure of the activated carbon fiber layer 2 may lead to contamination of the activated carbon fiber layer 2 and the alginate fiber layer 3 in contact with it. Therefore, in this embodiment, the protrusion 32 is annular, for example, see [reference needed]. Figure 4-5As shown, the activated carbon fiber layer 2 is completely covered by the alginate fiber layer 3, and the alginate fiber layer 3 is further protected by the release paper 7, thereby further ensuring the overall safety of the dressing.
[0040] Example 4: To simplify the manufacturing process, improvements were made based on Example 2, such as... Figure 3 As shown, in this embodiment, the first adhesive layer 4 and the second adhesive layer 5 are connected to each other.
[0041] In practice, if the first adhesive layer 4 and the second adhesive layer 5 are coated separately, the coating operation is quite cumbersome. Although the process of forming the first adhesive layer 4 and the second adhesive layer 5 directly by coating in one step means that some adhesive layers are not used for bonding, it simplifies the production process.
[0042] Example 5: To increase comfort when using the dressing, improvements were made based on Example 2, such as... Figure 1-2 As shown, in this embodiment, the distance between the contact portion 31 and the fixing layer 1 is greater than the distance between the connecting portion 321 and the fixing layer 1.
[0043] In practice, if the side of the alginate fiber layer 3 in contact with the skin is entirely horizontal, the overall coverage of the dressing around the wound increases, but the overall breathability decreases. This embodiment addresses this by using a connecting portion 321, a transition portion 322, and a contact portion 31. The contact portion 31 is designed to contact the wound, while the transition portion 322 creates an airflow channel between the dressing and the skin, increasing breathability and the evaporation of liquid in the alginate fiber layer 3. The presence of the transition portion 322 and the connecting portion 321 further increases the liquid capacity of the alginate fiber layer 3. The transition portion 322 does not directly contact the fixation layer 1, preventing liquid from seeping into the fixation layer 1. A second adhesive layer 5 exists between the connecting portion 321 and the fixation layer 1, further preventing liquid from seeping into the fixation layer 1.
[0044] Example 6: To increase the overall tensile strength of the material and enable continuous production using existing equipment, improvements were made based on Examples 1-5, such as... Figure 1 As shown, in this embodiment, it further includes: a tensile membrane 6; at least one of the upper and lower bottom surfaces of the alginate fiber layer 3 is covered with the tensile membrane 6, and the tensile strength of the tensile membrane 6 is greater than that of the alginate fiber layer 3.
[0045] In specific implementation, the tensile membrane 6 can be made of non-woven fabric, PE film, PUT film, PP film, etc., and the lamination process can be spraying adhesive, coating adhesive, and hot pressing. During the production of alginate dressings, the lamination of each layer of fabric involves straightening and winding the fabric. The tensile strength of the alginate fiber layer 3 alone is weak, and it is prone to deformation and breakage under the traction force of the equipment during operation. Therefore, in this embodiment, a tensile membrane 6 is laminated onto the surface of the alginate fiber layer 3, and then connected to the fixing layer 1 after laminating the tensile membrane 6. The tensile membrane 6 can be provided on one side of the alginate fiber layer 3, or on both sides.
[0046] Example 7: To increase the connection stability between the alginate fiber layer 3 and the fixing layer 1, improvements were made based on Example 6, such as... Figure 1 As shown, in this embodiment, the alginate fiber layer 3 is covered with the tensile membrane 6 on the side near the fixing layer 1.
[0047] In the specific implementation process, the alginate fiber layer 3 is mainly composed of short fibers. The bonding stability between the short fibers and the fixing layer 1 is relatively weak. Therefore, in this embodiment, after coating the surface of the alginate fiber layer 3, the bonding between the film and the adhesive can be increased to enhance the connection stability between the alginate fiber layer 3 and the fixing layer 1.
[0048] Example 8: To further increase the overall tensile strength of the material and enable continuous production using existing equipment, improvements were made based on Example 6, such as... Figure 1 As shown in this embodiment, at least one of the upper and lower bottom surfaces of the activated carbon fiber layer 2 is covered with the tensile film 6, and the tensile strength of the tensile film 6 is greater than that of the activated carbon fiber layer 2.
[0049] In the specific implementation process, during the fabrication of the alginate dressing, the lamination of each layer of fabric involves straightening and winding the fabric. The tensile strength of the activated carbon fiber layer 2 alone is relatively weak, and it is prone to deformation and breakage under the traction force of the equipment during operation. Therefore, in this embodiment, a tensile film 6 is laminated onto the surface of the activated carbon fiber layer 2, and then it is connected to the fixing layer 1 after the tensile film 6 is laminated. The tensile film 6 can be provided on one side of the activated carbon fiber layer 2, or it can be provided on both sides.
[0050] Example 9: To increase the connection stability between the activated carbon fiber layer 2 and the fixing layer 1, improvements were made based on Example 8, such as... Figure 1 As shown, in this embodiment, the side of the activated carbon fiber layer 2 closest to the fixing layer 1 is covered with the tensile membrane 6.
[0051] In the specific implementation process, the activated carbon fiber layer 2 is mainly composed of short fibers. The bonding stability between the short fibers and the fixed layer 1 is relatively weak. Therefore, in this embodiment, after coating the surface of the activated carbon fiber layer 2 with a film, the connection stability between the activated carbon fiber layer 2 and the fixed layer 1 can be increased by using the film and adhesive bonding method.
[0052] Example 10: In this example, the area of the alginate fiber layer 3 is 0.1-0.95 times the area of the fixed layer 1, and the area of the activated carbon fiber layer 2 is 0.05-0.9 times the area of the fixed layer 1.
[0053] In practice, the area of the alginate fiber layer 3 can be set according to the typical size of the wound type, while the area of the activated carbon fiber layer 2 can be smaller than that of the alginate fiber layer 3, so that the alginate fiber layer 3 completely covers the activated carbon fiber layer 2. The fixation layer 1 mainly serves a load-bearing function, and its area is preferably larger than the horizontal projected area of the alginate fiber layer 3. The area difference between the fixation layer 1 and the alginate fiber layer 3 can be set according to the application site of the alginate dressing. For example, if the dressing is used on the arm and the fixation layer 1 is needed to wrap the arm, the length of the fixation layer 1 can be longer, while the area of the alginate dressing is set based on the size of the wound.
[0054] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. An alginate dressing, characterized in that, include: The structure comprises a fixing layer, an activated carbon fiber layer, and an alginate fiber layer; the activated carbon fiber layer is located between the alginate fiber layer and the fixing layer; the alginate fiber layer completely covers the activated carbon fiber layer. The activated carbon fiber layer is connected to the fixing layer; the edge of the alginate fiber layer is connected to the fixing layer.
2. The alginate dressing according to claim 1, characterized in that, Also includes: A first adhesive layer and a second adhesive layer, wherein the first adhesive layer is located between the activated carbon fiber layer and the fixing layer, the alginate fiber layer includes a contact portion and a protrusion, the contact portion abuts against the activated carbon fiber layer, the orthogonal projection of the protrusion toward the fixing layer falls directly onto the fixing layer, the protrusion includes a connecting portion, and the second adhesive layer is located between the connecting portion and the fixing layer.
3. The alginate dressing according to claim 2, characterized in that, The protrusion is annular; the contact portion is located within the enclosed area of the protrusion and is connected to the protrusion.
4. The alginate dressing according to claim 2, characterized in that, The first adhesive layer and the second adhesive layer are connected to each other.
5. The alginate dressing of claim 2, wherein, The distance between the contact portion and the fixing layer is greater than the distance between the connecting portion and the fixing layer.
6. The alginate dressing according to any one of claims 1-5, characterized in that, Also includes: Tensile membrane; At least one of the upper and lower bottom surfaces of the alginate fiber layer is covered with the tensile film, and the tensile strength of the tensile film is greater than that of the alginate fiber layer.
7. The alginate dressing according to claim 6, characterized in that, The alginate fiber layer is covered with the tensile membrane on the side near the fixing layer.
8. The alginate dressing according to claim 6, characterized in that, At least one of the upper and lower surfaces of the activated carbon fiber layer is covered with the tensile film, and the tensile strength of the tensile film is greater than that of the activated carbon fiber layer.
9. The alginate dressing according to claim 8, characterized in that, The side of the activated carbon fiber layer closest to the fixing layer is covered with the tensile membrane.
10. The alginate dressing of claim 6, wherein, The area of the alginate fiber layer is 0.1-0.95 times the area of the fixed layer, and the area of the activated carbon fiber layer is 0.05-0.9 times the area of the fixed layer.