A self-adhesive wound protector
Through innovative design and material selection, self-adhesive wound dressings have solved the problems of insufficient waterproof performance, unstable drug release, and poor breathability, achieving rapid hemostasis, continuous drug release, and improved breathability, thus significantly improving wound care outcomes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN JIANQI MEDICAL DEVICES CO LTD
- Filing Date
- 2025-04-21
- Publication Date
- 2026-06-26
AI Technical Summary
Traditional self-adhesive wound dressings have shortcomings in terms of waterproof performance, drug release stability, breathability, and patient comfort. They are difficult to effectively isolate bacteria, achieve continuous drug release, and improve breathability, resulting in problems such as high risk of infection and pain and discomfort during wound healing.
A self-adhesive wound dressing was designed, comprising a supporting base layer, a main waterproof membrane layer, a secondary waterproof membrane layer, an antibacterial layer, a hemostatic absorbent cotton layer, a drug sustained-release layer, and a breathable membrane layer. It uses silver ion-containing antibacterial fiber material, medical absorbent cotton, biocompatible polymer material, and microporous polypropylene film, and is designed with cavity and groove structures to achieve firm adhesion, rapid hemostasis, continuous drug release, and breathability.
It effectively isolates external bacteria, quickly stops bleeding, continuously releases healing drugs, improves breathability, reduces the risk of infection, and enhances patient comfort. In addition, the materials are environmentally friendly, biocompatible, and easy to use.
Smart Images
Figure CN224403873U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wound dressing technology, specifically a self-adhesive wound dressing. Background Technology
[0002] In the medical field, wound care and healing are crucial aspects. Self-adhesive wound dressings, as a common wound care product, are widely used for the treatment of various types of wounds.
[0003] Traditional self-adhesive wound dressings have several shortcomings in practical use. Firstly, their wound protection capabilities are limited in preventing the entry of bacteria into the wound, thus hindering the healing process. Secondly, existing wound dressings often fail to achieve efficient and sustained drug release. Furthermore, their ability to relieve pain and quickly stop bleeding needs improvement to enhance patient comfort during wound healing. In addition, breathability is a significant issue with traditional wound dressings. Many dressings sacrifice breathability to ensure waterproofing, leaving the skin at the wound site in a hot and humid environment for extended periods, potentially causing skin discomfort, allergies, and even delaying healing. Utility Model Content
[0004] The purpose of this invention is to provide a self-adhesive wound dressing to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a self-adhesive wound dressing, comprising a supporting base layer, release paper, and an adhesive layer. A main waterproof membrane layer is provided on the top of the supporting base layer, and a groove is provided in the middle of the main waterproof membrane layer. A secondary waterproof membrane layer is provided inside the groove. A cavity is provided at the center of the bottom of the supporting base layer. An adhesive layer is uniformly provided on the bottom of the supporting base layer outside the cavity. An antibacterial layer is provided at the edge of the inner side of the cavity. A hemostatic absorbent cotton layer is provided below the antibacterial layer. Analgesic powder and hemostatic powder are uniformly disposed inside the hemostatic absorbent cotton layer. A drug-releasing layer is provided inside the antibacterial layer above the hemostatic absorbent cotton layer. Biodegradable material packets are uniformly disposed inside the drug-releasing layer. Each biodegradable material packet is filled with a healing drug. A breathable membrane layer is also provided on top of the antibacterial layer, and the breathable membrane layer is located below the secondary waterproof membrane layer.
[0006] Preferably, a release layer is provided at the junction of the sub-waterproof membrane layer and the breathable membrane layer, and the release layer is fixedly connected to the sub-waterproof membrane layer.
[0007] Preferably, one end of the top of the secondary waterproof membrane layer is also provided with an easy-peel edge.
[0008] Preferably, the inner side of the antibacterial layer is provided with a groove for accommodating the hemostatic absorbent cotton layer and the drug sustained-release layer.
[0009] Preferably, the bottom contour of the antibacterial layer is larger than the area of the hemostatic absorbent cotton layer, and the bottom edge of the antibacterial layer is wrapped around the outside of the hemostatic absorbent cotton layer in a ring shape.
[0010] Preferably, the main waterproof membrane layer and the secondary waterproof membrane layer are made of high-density polyethylene film, the antibacterial layer is made of antibacterial fiber material containing silver ions, the hemostatic absorbent cotton layer is made of medical absorbent cotton, the drug sustained-release layer is made of a biocompatible polymer material, and the breathable membrane layer is made of microporous polypropylene film.
[0011] Preferably, the analgesic powder is a powder containing lidocaine, the hemostatic powder is a powder containing thrombin, and the healing agent is a gel-like substance containing growth factors.
[0012] This invention provides a self-adhesive wound dressing, which has the following significant advantages compared to existing technologies:
[0013] 1. Optimize wound protection:
[0014] A cavity is created at the center of the bottom of the support base, and an adhesive layer is evenly distributed on the outside of the cavity to ensure that the patch adheres firmly to the skin and is not easily detached. At the same time, an antibacterial layer and a hemostatic absorbent cotton layer are placed at the inner edge of the cavity to effectively isolate external bacteria, reduce the possibility of infection, and provide rapid hemostasis.
[0015] 2. Enhance drug efficacy:
[0016] The analgesic and hemostatic powders evenly distributed within the hemostatic absorbent cotton layer can quickly take effect at the wound site, relieving patient pain and rapidly stopping bleeding. Furthermore, the biodegradable material packets evenly distributed within the sustained-release drug layer, filled with healing medication, can continuously and stably release the drug, promoting wound healing.
[0017] 3. Improves breathability:
[0018] The breathable membrane layer placed on top of the antibacterial layer, located below the secondary waterproof membrane layer, ensures waterproof performance while allowing the secondary waterproof membrane layer to be torn open when necessary, enabling gas exchange at the wound site. This avoids problems such as stuffiness and discomfort caused by poor breathability, thus improving the patient's user experience.
[0019] 4. Convenient user experience:
[0020] The easy-peel edge at the top of the secondary waterproof membrane layer makes changing the dressing more convenient and quick, reducing secondary injuries to patients caused by tearing the dressing. At the same time, the release paper design makes the dressing easy to handle before application, improving ease of use.
[0021] 5. Environmental friendliness and biocompatibility:
[0022] The materials used are all environmentally friendly and biocompatible, such as high-density polyethylene film, antibacterial fiber material containing silver ions, medical degreased cotton, biocompatible polymer materials and microporous polypropylene film, which not only ensure the safety and effectiveness of the patch, but also meet environmental protection requirements.
[0023] 6. Rationality of structural design:
[0024] The groove on the inner side of the antibacterial layer accommodates the hemostatic absorbent layer and the drug-releasing layer, ensuring the stability and synergistic effect of each layer. The bottom contour of the antibacterial layer is larger than the area of the hemostatic absorbent layer, and its bottom edge wraps around the outside of the hemostatic absorbent layer, further enhancing the overall sealing and protective effect of the patch.
[0025] In summary, this utility model, through innovative structural design and material selection, effectively solves the problems of insufficient waterproof performance, unstable drug release, and poor breathability in the prior art, and significantly improves the overall performance and user experience of wound dressings. Attached Figure Description
[0026] 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.
[0027] Figure 1 This is a bottom view of the structure of this utility model;
[0028] Figure 2 This is a schematic diagram of the internal structure of the present invention;
[0029] Figure 3 This is a top view of the structure of this utility model;
[0030] Figure 4 This is a schematic diagram of the drug sustained-release layer structure of this utility model;
[0031] In the diagram: 1. Supporting base layer; 2. Adhesive layer; 3. Analgesic powder; 4. Tank; 5. Antibacterial layer; 6. Cavity; 7. Hemostatic absorbent cotton layer; 8. Main waterproof membrane layer; 9. Secondary waterproof membrane layer; 10. Groove opening; 11. Easy-peel edge; 12. Release paper; 13. Drug sustained-release layer; 14. Breathable membrane layer; 15. Release layer; 16. Hemostatic powder; 17. Healing medicine; 18. Biodegradable material package. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0033] Please see Figure 1-4 An embodiment of this utility model provides a self-adhesive wound dressing, comprising a supporting base layer 1, a release paper 12, and an adhesive layer 2. A main waterproof membrane layer 8 is provided on the top of the supporting base layer 1, and a groove 10 is provided in the middle of the main waterproof membrane layer 8. A secondary waterproof membrane layer 9 is provided on the inner side of the groove 10. A cavity 6 is provided in the center of the bottom of the supporting base layer 1. An adhesive layer 2 is uniformly provided on the bottom of the supporting base layer 1 outside the cavity 6, and an antibacterial layer 5 is provided at the edge of the inner side of the cavity 6. The antibacterial layer 5 is made of antibacterial fiber material containing silver ions.
[0034] Support Base Layer 1: As the basic support structure of the entire protective layer, Support Base Layer 1 is made of a soft yet strong material, such as non-woven fabric or breathable synthetic fiber material. Different functional layers are provided at the top and bottom of Support Base Layer 1.
[0035] Main waterproof membrane layer 8: Located on top of the supporting base layer 1, covering the entire top surface of the supporting base layer 1. The main waterproof membrane layer 8 is made of a material with high waterproof performance.
[0036] Groove 10: A groove 10 is provided in the middle of the main waterproof membrane layer 8. The shape of the groove 10 can be rectangular or other geometric shapes suitable for the wound shape. The function of the groove 10 is to facilitate ventilation of the wound.
[0037] Secondary waterproof membrane layer 9: Located inside the groove 10, covering the inner edge of the groove 10. The secondary waterproof membrane layer 9 also uses a high waterproof performance material, the same or similar to the material of the main waterproof membrane layer 8, to ensure the waterproof effect inside the groove 10.
[0038] Cavity 6: A cavity 6 is provided at the center of the bottom of the support base layer 1. The shape of the cavity 6 corresponds to the groove 10, ensuring that the groove 10 and the cavity 6 are aligned. The function of the cavity 6 is to provide a space to accommodate the wound and prevent the dressing from directly compressing the wound.
[0039] Adhesive layer 2: An adhesive layer 2 is uniformly disposed at the bottom of the support base layer 1 on the outside of the cavity 6. The adhesive layer 2 uses medical pressure-sensitive adhesive, which has good adhesion and skin compatibility, ensuring that the patch can be firmly adhered to the skin.
[0040] Antibacterial layer 5: An antibacterial layer 5 is provided at the edge of the inner side of the cavity 6. The material of the antibacterial layer 5 is an antibacterial fiber material containing silver ions. Silver ions have a broad-spectrum antibacterial effect and can effectively prevent wound infection.
[0041] Below the antibacterial layer 5 is a hemostatic absorbent cotton layer 7. The hemostatic absorbent cotton layer 7 is uniformly filled with analgesic powder 3 and hemostatic powder 16. The analgesic powder 3 is a powder containing lidocaine, and the hemostatic powder 16 is a powder containing thrombin. Above the hemostatic absorbent cotton layer 7, on the inner side of the antibacterial layer 5, is a drug sustained-release layer 13. The drug sustained-release layer 13 is uniformly filled with biodegradable material packages 18. Each biodegradable material package 18 is filled with a healing drug 17, which is a gel-like substance containing growth factors.
[0042] The material of the hemostatic absorbent cotton layer 7 is medical absorbent cotton, and the material of the drug sustained-release layer 13 is a biocompatible polymer material.
[0043] The inner side of the antibacterial layer 5 is provided with a groove 4 for accommodating the hemostatic absorbent cotton layer 7 and the drug sustained-release layer 13. The bottom contour of the antibacterial layer 5 is larger than the area of the hemostatic absorbent cotton layer 7, and the bottom edge of the antibacterial layer 5 is wrapped around the outer side of the hemostatic absorbent cotton layer 7.
[0044] Antimicrobial layer 5: Located on the outermost layer of the composite dressing, its main function is to prevent external bacteria from entering the wound, thereby reducing the risk of infection. The material of antimicrobial layer 5 is preferably a medical fabric with good antimicrobial properties.
[0045] Tank 4: Located inside the antibacterial layer 5, it is used to accommodate the hemostatic absorbent cotton layer 7 and the drug sustained-release layer 13. The design of tank 4 ensures the fixation and orderly arrangement of the materials in each layer.
[0046] Hemostatic absorbent cotton layer 7: Located at the bottom of the tank 4, its main function is to absorb wound exudate and provide hemostasis. The material of the hemostatic absorbent cotton layer is medical absorbent cotton, which has good water absorption and softness.
[0047] Pain-relieving powder 3 and hemostatic powder 16 are evenly distributed inside the hemostatic absorbent cotton layer 7. Pain-relieving powder 3 is a powder containing lidocaine, a commonly used local anesthetic that effectively relieves wound pain. Hemostatic powder 16 is a powder containing thrombin, which promotes blood clotting and quickly stops bleeding.
[0048] Drug-release layer 13: Located above the hemostatic absorbent cotton layer 7, its main function is to slowly release healing drugs to promote wound healing. The drug-release layer is made of a biocompatible polymer material to ensure that it will not cause rejection reactions in the body.
[0049] Biodegradable material package 18: Evenly distributed inside the drug sustained-release layer 13, each biodegradable material package 18 is filled with healing drug 17. The healing drug 17 is a gel-like substance containing growth factors, which can stimulate cell proliferation and differentiation, and accelerate wound healing.
[0050] The bottom contour of the antibacterial layer 5 is larger than the area of the hemostatic absorbent cotton layer 7, and the bottom edge of the antibacterial layer 5 is wrapped around the outside of the hemostatic absorbent cotton layer 7. This design not only effectively prevents bacterial invasion, but also ensures that the hemostatic absorbent cotton layer 7 and the drug sustained-release layer 13 are firmly fixed in the tank 4 and are not easily displaced.
[0051] A breathable membrane layer 14 is also provided on top of the antibacterial layer 5. The breathable membrane layer 14 is made of microporous polypropylene film and is located below the sub-waterproof membrane layer 9.
[0052] A release layer 15 is provided at the connection between the secondary waterproof membrane layer 9 and the breathable membrane layer 14, and the release layer 15 is fixedly connected to the secondary waterproof membrane layer 9.
[0053] The top end of the secondary waterproof membrane layer 9 is also provided with an easy-peel edge 11.
[0054] The main waterproof membrane layer 8 and the secondary waterproof membrane layer 9 are made of high-density polyethylene film.
[0055] The breathable membrane layer 14 is made of microporous polypropylene film, which has good breathability while effectively blocking the penetration of liquids and bacteria. The breathable membrane layer 14 is located below the sub-waterproof membrane layer 9. This layout design aims to ensure breathability while preventing liquid infiltration.
[0056] A release layer 15 is provided at the junction of the sub-waterproof membrane layer 9 and the breathable membrane layer 14. The main function of the release layer 15 is to facilitate the separation of the breathable membrane layer 14 and the sub-waterproof membrane layer 9, while ensuring that the two are firmly fixed together before separation. The release layer 15 and the sub-waterproof membrane layer 9 are fixedly connected by adhesives or other fixing methods.
[0057] The top end of the secondary waterproof membrane layer 9 is provided with an easy-peel edge 11, which allows users to easily peel off the seal when needed without affecting the integrity of the overall structure.
[0058] Both the main waterproof membrane layer 8 and the secondary waterproof membrane layer 9 are made of high-density polyethylene film material. This material has excellent waterproof performance and mechanical strength, and can effectively protect the internal structure from the influence of the external environment.
[0059] When this application embodiment is used,
[0060] Preparation phase: Healthcare workers or patients remove the self-adhesive wound dressing from the packaging. At this time, the adhesive layer 2 of the dressing is covered by release paper 12 to prevent the adhesive layer from being contaminated before use. Confirm that the skin around the wound is clean and dry. If necessary, perform preliminary cleaning and disinfection of the wound.
[0061] Applying the dressing: Carefully peel off the release paper 12 to expose the adhesive layer 2. Align the dressing with the wound, ensuring that the cavity 6 at the center of the bottom of the support base 1 corresponds to the wound location. Then, gently press the adhesive layer 2 to firmly adhere it to the skin around the wound. Because the adhesive layer 2 uses medical pressure-sensitive adhesive, it has excellent adhesion and skin compatibility, ensuring stable adhesion of the dressing.
[0062] Wound Protection and Isolation: The antibacterial layer 5, located at the inner edge of the cavity 6, utilizes its silver-ion-containing antibacterial fiber material to prevent external bacteria from entering the wound and reduce the possibility of infection. The bottom contour of the antibacterial layer 5 is larger than the area of the hemostatic absorbent cotton layer 7 and wraps around it in a ring, further enhancing the barrier effect against bacteria. The main waterproof membrane layer 8 and the secondary waterproof membrane layer 9 (made of high-density polyethylene film) work together to prevent external moisture from entering the wound area. The main waterproof membrane layer 8 covers the top of the supporting base layer 1, while the secondary waterproof membrane layer 9 covers the inner edge of the groove 10, ensuring good waterproof performance.
[0063] Hemostasis and Analgesia: When there is exudate from the wound, the hemostatic absorbent cotton layer 7 (made of medical absorbent cotton) begins to absorb the exudate. Simultaneously, the analgesic powder 3 (containing lidocaine) and hemostatic powder 16 (containing thrombin), evenly distributed within the hemostatic absorbent cotton layer 7, take effect. Lidocaine, as a local anesthetic, relieves wound pain; thrombin promotes blood clotting, achieving rapid hemostasis.
[0064] Sustained drug release and wound healing:
[0065] The biodegradable material package 18 within the drug sustained-release layer 13 (a biocompatible polymer material) begins to slowly release the healing drug 17 (a gel-like substance containing growth factors) that fills it. The growth factors stimulate cell proliferation and differentiation at the wound site, accelerating the wound healing process. The drug sustained-release layer 13 sits above the hemostatic absorbent cotton layer 7, ensuring the drug continues to act on the wound.
[0066] Breathability and Usage Adjustment (if necessary): The breathable membrane layer 14 (microporous polypropylene film material) is located on top of the antibacterial layer 5 and below the sub-waterproof membrane layer 9, ensuring breathability at the wound site and preventing discomfort or allergies caused by stuffiness and moisture. If further enhancement of breathability is required during use, the easy-peel edge 11 at the top of the sub-waterproof membrane layer 9 can be lifted, and the release layer 15 at the connection between the sub-waterproof membrane layer 9 and the breathable membrane layer 14 can be torn open to expose the breathable membrane layer 14 directly, increasing gas exchange at the wound site.
[0067] Replacing the dressing: Depending on the wound healing progress and the amount of exudate, replace the self-adhesive wound dressing as needed, following the advice of healthcare professionals or the product instructions. When replacing, carefully peel off the old dressing to avoid further damage to the wound, and then repeat the above steps to apply the new dressing.
[0068] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.
[0069] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0070] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.
[0071] 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. A self-adhesive wound dressing, comprising a supporting base layer (1), release paper (12), and an adhesive layer (2), characterized in that: The top of the supporting base layer (1) is provided with a main waterproof membrane layer (8), and a groove (10) is provided in the middle of the main waterproof membrane layer (8). A secondary waterproof membrane layer (9) is provided inside the groove (10). A cavity (6) is provided in the center of the bottom of the supporting base layer (1). An adhesive layer (2) is uniformly provided at the bottom of the supporting base layer (1) outside the cavity (6). An antibacterial layer (5) is provided at the edge of the inner side of the cavity (6). A hemostatic absorbent cotton layer (7) is provided below the antibacterial layer (5). The cotton layer (7) is uniformly provided with analgesic powder (3) and hemostatic powder (16), and a drug sustained-release layer (13) is provided on the inner side of the antibacterial layer (5) above the hemostatic absorbent cotton layer (7). A biodegradable material package (18) is uniformly provided inside the drug sustained-release layer (13), and each biodegradable material package (18) is filled with healing drug (17). A breathable membrane layer (14) is also provided on the top of the antibacterial layer (5), and the breathable membrane layer (14) is located below the sub-waterproof membrane layer (9).
2. The self-adhesive wound dressing according to claim 1, characterized in that: A release layer (15) is provided at the connection between the sub-waterproof membrane layer (9) and the breathable membrane layer (14), and the release layer (15) is fixedly connected to the sub-waterproof membrane layer (9).
3. The self-adhesive wound dressing according to claim 1, characterized in that: The top end of the sub-waterproof membrane layer (9) is also provided with an easy-peel edge (11).
4. The self-adhesive wound dressing according to claim 1, characterized in that: The inner side of the antibacterial layer (5) is provided with a groove (4) for accommodating the hemostatic absorbent cotton layer (7) and the drug sustained-release layer (13).
5. The self-adhesive wound dressing according to claim 1, characterized in that: The bottom contour of the antibacterial layer (5) is larger than the area of the hemostatic absorbent cotton layer (7), and the bottom edge of the antibacterial layer (5) is wrapped around the outside of the hemostatic absorbent cotton layer (7).
6. The self-adhesive wound dressing according to claim 1, characterized in that: The main waterproof membrane layer (8) and the secondary waterproof membrane layer (9) are made of high-density polyethylene film, the antibacterial layer (5) is made of antibacterial fiber material containing silver ions, the hemostatic absorbent cotton layer (7) is made of medical degreased cotton, the drug sustained-release layer (13) is made of a biocompatible polymer material, and the breathable membrane layer (14) is made of microporous polypropylene film.
7. The self-adhesive wound dressing according to claim 1, characterized in that: The analgesic powder (3) is a powder containing lidocaine, the hemostatic powder (16) is a powder containing thrombin, and the healing agent (17) is a gel containing growth factors.