A water-absorbing dressing

Abstract

The utility model discloses a kind of water-absorbing dressings, it is related to dressing technical field, including backing layer, the side fixedly connected with absorption core layer of backing layer, the outside fixedly connected with contact layer of absorption core layer, the outer layer of contact layer to inner layer is sequentially composed of response layer and biological activity layer, the outer layer of absorption core layer to inner layer is sequentially composed of flow guide layer, absorption layer and prevent reverse osmosis layer, the outside of contact layer is adhered with release paper, the side of absorption core layer of backing layer is adhered with pasting layer, the outside fixedly connected with positioning block of backing layer, the outside fixedly connected with belt of positioning block, the end fixedly connected with connecting block of belt, and connecting block and the positioning mechanism between backing layer are installed. The device is automatically adjusted hydrophilic and hydrophobic through temperature-sensitive hydrogel, combined with silk fibroin to continuously promote healing, flow, absorption and reverse osmosis prevention structure synergistic management exudate, supplemented with flexible traction design to reduce peeling damage, interlayer closely adheres to avoid side leakage, improve nursing efficiency and comfort.

Description

Technical Field

[0001] This utility model relates to the field of dressing technology, and more specifically, to an absorbent dressing. Background Technology

[0002] Traditional medical dressings generally face challenges in managing highly exudative wounds, including low exudate absorption efficiency and the tendency for dressings to adhere to the wound during changes. While gauze dressings are inexpensive, they tend to adhere to new tissue once saturated, causing secondary damage upon removal. Hydrocolloid dressings, although maintaining a moist environment, are insufficient for managing large amounts of exudate and lack dynamic adjustment capabilities. Existing technologies, such as those using alginate or foam materials to increase absorbency, still suffer from problems like backflow and side leakage due to interlayer misalignment. Furthermore, they lack intelligent responses to infection status, making it difficult to balance efficient care with operational safety.

[0003] Furthermore, existing dressings do not pay enough attention to user experience in their structural design. For example, they rely on direct tearing when changing, which can easily cause mechanical damage to fragile tissues or hairy areas. The interfacial bonding strength of multi-layer composite dressings is insufficient, and they are prone to layering and displacement during use. Although some products have tried to add antibacterial ingredients or sustained-release drugs, their functions are limited and they cannot achieve synergistic optimization of exudate management, healing promotion and ease of use. Therefore, in response to the above technical problems, an absorbent dressing is proposed here. Utility Model Content

[0004] The purpose of this invention is to provide an absorbent dressing that automatically adjusts the hydrophilicity and hydrophobicity of the hydrogel through temperature-sensitive hydrogel, continuously promotes healing by combining silk fibroin, and manages exudate in a coordinated manner through a drainage, absorption and anti-backflow structure. It is also equipped with a flexible traction design to reduce peeling damage, and the tight fit between layers prevents side leakage, thereby improving nursing efficiency and comfort.

[0005] This utility model is achieved through the following technical solution:

[0006] An absorbent dressing includes a backing layer, an absorbent core layer fixedly connected to one side of the backing layer, a contact layer fixedly connected to the outside of the absorbent core layer, the outer and inner layers of the contact layer being composed of a responsive layer and a bioactive layer respectively, the outer and inner layers of the absorbent core layer being composed of a flow-guiding layer, an absorbent layer and an anti-backflow layer respectively, release paper being adhered to the outside of the contact layer, an adhesive layer being adhered to one side of the backing layer located on the absorbent core layer, a positioning block being fixedly connected to the outside of the backing layer, a strap being fixedly connected to the outside of the positioning block, a connecting block being fixedly connected to the end of the strap, and a positioning mechanism being installed between the connecting block and the backing layer.

[0007] Preferably, the responsive layer is composed of a temperature-sensitive hydrogel, and the bioactive layer is composed of a silk fibroin film.

[0008] Preferably, the flow guiding layer is made of hydrophilic nonwoven fabric, the absorption layer is made of alginate fiber, and the anti-backflow layer is made of hydrophobic polyurethane microporous membrane.

[0009] Preferably, the adhesive layer has a ring structure that encloses the absorbent core layer, contact layer, and other structures.

[0010] Preferably, the positioning blocks are installed at the four corners of the backing layer.

[0011] Preferably, the positioning mechanism includes a positioning rubber block, a ball groove, and a locking block. The positioning rubber block is fixedly connected to the outside of the backing layer, the ball groove is formed on the outside of the positioning rubber block, and the locking block is fixedly connected to the lower side of the connecting block.

[0012] Preferably, the overall structure of the card block is a connecting rod-connected ball structure, and the ball and the ball groove are matched.

[0013] The technical solution of this utility model has at least the following beneficial effects:

[0014] This invention proposes an absorbent dressing that dynamically adjusts its hydrophilicity and hydrophobicity using a temperature-sensitive hydrogel. During normal healing, it accelerates exudate absorption; during infection and fever, it actively reduces adhesion, significantly decreasing pain and tissue damage during dressing changes. Continuous release of silk fibroin promotes epithelial regeneration, shortening the healing cycle. A drainage layer directionally guides exudate, an absorbent layer efficiently locks in moisture and gels, and an anti-backflow layer blocks fluid reflux, synergistically maintaining a moist environment and preventing skin maceration. Simultaneously, a flexible traction design transforms vertical tearing force into tangential peeling force, reducing mechanical damage to fragile tissues or hairy areas, making operation gentler and safer. The tightly bonded functional layers prevent displacement and side leakage, ensuring complete control over exudate flow. Overall, it combines intelligent response, efficient absorption, and user-friendly operation, making it particularly suitable for highly exudative wounds, improving nursing outcomes and patient comfort. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a partial side sectional view of the present invention;

[0017] Figure 3 for Figure 2 Enlarged view of A in the middle;

[0018] Figure 4 This is a schematic diagram of the second overall structure of the present invention;

[0019] Figure 5 This is a partial structural side sectional view of the present invention;

[0020] Figure 6 for Figure 5 Enlarged view of B in the middle;

[0021] Reference numerals: 1. Backing layer; 2. Absorbent core layer; 3. Contact layer; 4. Response layer; 5. Bioactive layer; 6. Flow guiding layer; 7. Anti-reverse osmosis layer; 8. Absorbent layer; 9. Release paper; 10. Adhesive layer; 11. Positioning block; 12. Strapping belt; 13. Connecting block; 14. Positioning adhesive block; 15. Ball groove; 16. Locking block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-6 The present invention proposes an absorbent dressing, comprising a backing layer 1, an absorbent core layer 2 fixedly connected to one side of the backing layer 1, the backing layer 1 and the absorbent core layer 2 being bonded together by hot melt adhesive and hot-pressed with medical pressure-sensitive adhesive to ensure breathability and structural stability, a contact layer 3 being fixedly connected to the outside of the absorbent core layer 2, the absorbent core layer 2 and the contact layer 3 being bonded together by hydroentanglement, using high-pressure water jet to interweave fibers to achieve adhesive-free liquid permeability bonding.

[0024] The outer layer of the contact layer 3 consists of a responsive layer 4 and a bioactive layer 5, from the outer layer to the inner layer. The responsive layer 4 is made of temperature-sensitive hydrogel, and the bioactive layer 5 is made of silk fibroin film. The responsive layer 4 and the bioactive layer 5 are connected by a functional gradient. The interface is fused by a low-temperature cold-pressing composite process, thus preserving the temperature-sensitive properties and bioactivity.

[0025] The outer to inner layers of the absorbent core layer 2 consist of a flow guiding layer 6, an absorbent layer 7, and an anti-reverse osmosis layer 8. The flow guiding layer 6 is made of hydrophilic nonwoven fabric. The bioactive layer 5 and the flow guiding layer 6 are interconnected by microporous interlocking. Electrospinning technology is used to make the nanofiber network interwoven and permeate to ensure directional liquid guidance. The absorbent layer 7 is made of alginate fiber. The flow guiding layer 6 and the absorbent layer 7 are bonded by hot air penetration. High porosity flow guiding channels are formed by hot air reinforcement of nonwoven materials. The anti-reverse osmosis layer 8 is made of hydrophobic polyurethane microporous membrane. The absorbent layer 7 and the anti-reverse osmosis layer 8 are bonded by a hydrophobic-hydrophilic interface. Plasma treatment is used to enhance the bonding strength between the polyurethane membrane and the alginate layer.

[0026] Release paper 9 is adhered to the outside of the contact layer 3, and an adhesive layer 10 is adhered to the backing layer 1 on one side of the absorbent core layer 2. The adhesive layer 10 has a ring structure that wraps the absorbent core layer 2, contact layer 3 and other structures inside.

[0027] A positioning block 11 is fixedly connected to the outside of the backing layer 1. The positioning block 11 is installed at the four corners of the backing layer 1. A strap 12 is fixedly connected to the outside of the positioning block 11. A connecting block 13 is fixedly connected to the end of the strap 12. A positioning mechanism is installed between the connecting block 13 and the backing layer 1. The positioning mechanism includes a positioning rubber block 14, a ball groove 15 and a locking block 16. The positioning rubber block 14 is fixedly connected to the outside of the backing layer 1. The ball groove 15 is opened on the outside of the positioning rubber block 14. The locking block 16 is fixedly connected to the lower side of the connecting block 13. The overall structure of the locking block 16 is a connecting rod connecting ball structure, and the ball and the ball groove 15 are matched.

[0028] The working principle of an absorbent dressing based on an embodiment is as follows: When in use, the user first peels off the release paper 9 outside the contact layer 3, exposing the bioactive layer 5 and the responsive layer 4. When the dressing is applied to the wound through the annular adhesive layer 10, the temperature-sensitive hydrogel of the responsive layer 4 immediately responds to the skin temperature: if the wound is in a normal healing state, the hydrogel maintains its hydrophilic properties and quickly guides the exudate to the drainage layer 6; if the local temperature rises due to infection, the hydrogel automatically becomes hydrophobic, reducing the risk of adhesion to the new granulation tissue. The exudate quickly diffuses through the hydrophilic nonwoven fabric of the drainage layer 6 to the alginate fibers of the absorbent layer 7. The fibers swell upon contact with the liquid to form a gel, locking in the exudate while maintaining a moderately moist environment. Meanwhile, the bottom anti-backflow layer 8 blocks liquid backflow through hydrophobic micropores, preventing the surrounding skin from being soaked.

[0029] During its use, the silk fibroin in the bioactive layer 5 is continuously released, promoting the directional migration of epithelial cells at the wound edge and shortening the healing time. When the dressing needs to be changed, the user can grasp the strap 12 and pull it outward through the limiting action between the locking block 16 and the ball groove 15. With the fixing action of the positioning block 11 on the backing layer 1, the dressing can be quickly and gradually peeled off from the patient's skin. This process greatly reduces the difficulty of traditional tearing methods and is especially suitable for fragile new tissue or areas with dense hair. In addition, the tight composite design between the absorbent core layer 2 and the contact layer 3 ensures that there is no interlayer displacement during use, avoiding leakage due to structural misalignment. Through the dual innovation of materials science and mechanical structure, this dressing achieves a deep integration of efficient care and humanized operation in dynamic usage scenarios.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An absorbent dressing, characterized in that: The backing layer (1) is fixedly connected to one side of the backing layer (1), and a contact layer (3) is fixedly connected to the outside of the absorbent core layer (2). The outer layer to the inner layer of the contact layer (3) is composed of a response layer (4) and a bioactive layer (5). The outer layer to the inner layer of the absorbent core layer (2) is composed of a flow guiding layer (6), an absorption layer (7), and an anti-reverse osmosis layer (8). Release paper (9) is adhered to the outside of the contact layer (3). An adhesive layer (10) is adhered to one side of the backing layer (1) located on the absorbent core layer (2). A positioning block (11) is fixedly connected to the outside of the backing layer (1). A strap (12) is fixedly connected to the outside of the positioning block (11). A connecting block (13) is fixedly connected to the end of the strap (12), and a positioning mechanism is installed between the connecting block (13) and the backing layer (1).

2. The absorbent dressing according to claim 1, characterized in that: The responsive layer (4) is composed of a temperature-sensitive hydrogel, and the bioactive layer (5) is composed of a silk fibroin film.

3. The absorbent dressing according to claim 1, characterized in that: The flow guiding layer (6) is made of hydrophilic nonwoven fabric, the absorption layer (7) is made of alginate fiber, and the anti-reverse osmosis layer (8) is made of hydrophobic polyurethane microporous membrane.

4. The absorbent dressing according to claim 1, characterized in that: The adhesive layer (10) has a ring structure that encloses the absorbent core layer (2) and the contact layer (3).

5. The absorbent dressing according to claim 1, characterized in that: The positioning blocks (11) are installed at the four corners of the backing layer (1).

6. The absorbent dressing according to claim 1, characterized in that: The positioning mechanism includes a positioning rubber block (14), a ball groove (15), and a locking block (16). The positioning rubber block (14) is fixedly connected to the outside of the backing layer (1), the ball groove (15) is opened on the outside of the positioning rubber block (14), and the locking block (16) is fixedly connected to the lower side of the connecting block (13).

7. The absorbent dressing according to claim 6, characterized in that: The overall structure of the card block (16) is a connecting rod-connected ball structure, and the ball is matched with the ball groove (15).

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