High-absorptive-amount degradable chitosan dressing and medical supplies
By designing a multi-layer structure with high absorption and degradable chitosan dressing, the problem of insufficient absorption capacity of existing dressings is solved, and the effect of rapid absorption and locking of thick liquid is achieved, reducing the replacement frequency and care costs, and promoting wound healing.
Patent Information
- Application Number
- CN202420650806.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-03-29
AI Technical Summary
Existing wound care chitosan dressings are inadequate in absorbing thick liquids and require frequent replacement, resulting in patient pain and high care costs.
A high absorption, degradable chitosan dressing is designed with a multi-layer structural design, including a release layer, a viscose layer, a flow guide layer, an absorbent layer and a water repellent layer. The absorbing layer quickly absorbs and locks the thick liquid by setting up a grid structure and water-absorbing resin SAP particles, and adsorbs and decomposes foul smells through the deodorizing layer.
Significantly improves the absorption capacity of the dressing, reduces the frequency of dressing replacement, reduces the pain and care costs for patients, while providing comfort and deodorization properties, promoting wound healing.
Smart Images
Figure CN222640749U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of dressings, and in particular to a high-absorption, degradable chitosan dressing and medical supplies. Background Art
[0002] The skin is an important organ of the human body. It controls body temperature, prevents infection and loss of body fluids, and plays a role in immunity and sensing. Trauma, abrasions, skin ulcers and burns may cause extensive damage to the skin. Skin damage is prone to bacterial infection and various complications. Wound dressings are usually used to protect wounds, prevent infection and dehydration of wounds, maintain a moist environment conducive to treatment at the wound site, improve treatment effects, and promote wound healing.
[0003] Chitosan is a naturally occurring polysaccharide material. The molecular structure of chitosan dressings is similar to that of mucopolysaccharide matrix in the interstitial matrix, and it has good cell compatibility, providing a favorable environment for the growth of skin cells and facilitating wound healing. At the same time, chitosan is the only cationic alkaline polysaccharide in nature, which reacts with anions on the surface of red blood cells to produce red blood cell aggregation. In addition, the amino group of chitosan has the ability to adsorb lipids, and the lipids on the cell membrane of red blood cells have a large specific gravity. Through the adsorption of the amino group of chitosan and the lipids on the cell membrane, the aggregation of chitosan cells is promoted to achieve the purpose of hemostasis.
[0004] With regard to the wound care chitosan dressings currently on the market, the product is comfortable, but has a poor ability to absorb thick liquids, and the dressing needs to be changed frequently during use. For this reason, the present application provides a high-absorption, degradable chitosan dressing and medical supplies. Utility Model Content
[0005] In order to overcome the shortcomings of the prior art, the present application describes a high-absorption, degradable chitosan dressing and medical supplies, in which an absorption layer is arranged in the chitosan dressing. The absorption layer is provided with a deodorizing layer composed of a mixture formed by chitosan fibers and absorbent resin SAP particles, thereby ensuring that the dressing quickly absorbs thick liquids and wound odors and is soft and comfortable to use. At the same time, the adhesive layer has a slight sticky effect and does not require additional fixation during use, making it convenient to observe the patient's wound healing at any time.
[0006] The technical solution adopted by this application to solve its technical problem is:
[0007] The first object of the present application is to provide a high-absorption, degradable chitosan dressing, comprising a release layer, an adhesive layer, a guide layer, an absorption layer, and a water-repellent layer attached together in sequence;
[0008] The absorption layer is provided with a grid structure, and water-absorbent resin SAP particles are arranged in the grid structure.
[0009] Preferably, the absorption layer comprises a first chitosan layer, a deodorizing layer, and a second chitosan layer which are sequentially attached together, and a wet-strength paper covering the first chitosan layer, the deodorizing layer, and the second chitosan layer.
[0010] Preferably, the deodorizing layer is made of a mixture of chitosan fibers and water-absorbent resin SAP particles.
[0011] Preferably, the absorption layer is laminated and covered by the edge of the guide layer and the edge of the water-repellent layer.
[0012] Preferably, the release layer is made of polypropylene film or polyethylene film.
[0013] Preferably, the adhesive layer is made of a silicone coil with perforations.
[0014] Preferably, the diameter of the perforations is 1-3 mm.
[0015] Preferably, the guide layer is made of any one of hydrophilic PP non-woven fabric, ES non-woven fabric, hydrophilic hot air non-woven fabric, and degradable PLA non-woven fabric.
[0016] Preferably, the water-repellent layer is selected from a degradable polylactic acid water-repellent non-woven fabric layer or a degradable polylactic acid hydrophilic non-woven fabric layer.
[0017] The second purpose of the present application is to provide medical supplies including the chitosan dressing described above.
[0018] The beneficial effects of this application are:
[0019] 1. The chitosan dressing of the present application adopts a multi-layer structural design, including a release layer, an adhesive layer, a flow-guiding layer, an absorption layer, and a water-repellent layer. This structural design not only ensures the stability and functionality of the dressing, but also enables the various layers to work together to achieve various beneficial effects of the dressing.
[0020] 2. The chitosan dressing of the present application, by providing a grid structure on the absorption layer and filling the grid structure with water-absorbent resin SAP particles or providing a deodorizing layer composed of a mixture of chitosan fibers and water-absorbent resin SAP particles, enables the dressing to quickly absorb and lock thick liquids, such as blood and pus exuded from wounds. This greatly enhances the absorption capacity of the dressing, reduces the frequency of dressing changes, and thus reduces the pain of patients and the cost of care.
[0021] 3. The design of the absorption layer of the chitosan dressing of the present application also fully considers the comfort and deodorization performance of the dressing. The absorption layer includes a first chitosan layer, a deodorization layer, a second chitosan layer, and a wet-strength paper wrapped around the outer layer. The deodorization layer is made of a mixture of chitosan fibers and absorbent resin SAP particles. This material not only has excellent moisture absorption performance, but also can effectively absorb and decompose the malodor emitted by the wound, thereby improving the patient's use experience.
[0022] 4. The chitosan dressing described in this application, the adhesive layer, the guide layer, the absorption layer and the water-repellent layer work together to achieve the fixing, conduction, absorption and waterproofing functions of the dressing. The chitosan dressing provides a dry, clean and healing environment for the wound. At the same time, the degradable characteristics of the dressing also meet environmental protection requirements, providing a sustainable solution for the development of the wound care field. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The present application is further described below in conjunction with the accompanying drawings and embodiments.
[0024] Figure 1 is a schematic diagram of the structure of the chitosan dressing described in the present application;
[0025] Figure 2 is a schematic diagram of the structure of the absorption layer described in the present application;
[0026] Wherein: 1. release layer; 2. adhesive layer; 3. guide layer; 4. absorption layer; 5. water-repellent layer; 411. first chitosan layer; 412. deodorizing layer; 413. second chitosan layer; 414. wet-strength paper. DETAILED DESCRIPTION
[0027] The following will clearly and completely describe the concept, specific structure and technical effects of the present application in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments of the present application, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the present application. In addition, all the connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features created in this application can be combined interactively without conflicting with each other.
[0028] like Figure 1 The high-absorption, degradable chitosan dressing comprises a release layer 1, an adhesive layer 2, a flow-guiding layer 3, an absorption layer 4, and a water-repellent layer 5 which are attached together in sequence;
[0029] The absorption layer 4 is provided with a grid structure, and water-absorbent resin SAP particles are arranged in the grid structure.
[0030] The number of diversion layers can be 1, 2, or 3, designed according to actual needs;
[0031] It can be understood that the main component of the water-absorbent resin SAP particles can be acrylic resin. The water-absorbent resin SAP particles can absorb hundreds to thousands of times of their own weight of water, and the absorbed water cannot be squeezed out by simple physical methods, and have the ability to repeatedly release and absorb water. The water-absorbent resin SAP particles are non-toxic, harmless, and non-polluting, and are not harmful to the baby's skin. In the grid structure, the main function of the SAP particles is to quickly absorb and lock the thick liquid exuded from the wound, keep the wound dry and clean, and provide a good environment for wound healing.
[0032] It can be understood that the grid structure of the absorption layer 4 of the present application provides support and distribution space for the SAP particles, and the SAP particles use their strong water absorption properties to effectively keep the wound dry and promote wound healing.
[0033] In one embodiment, Figure 2 As shown, the absorption layer 4 includes a first chitosan layer 411, a deodorizing layer 412, and a second chitosan layer 413 attached in sequence, and a wet-strength paper 414 covering the first chitosan layer 411, the deodorizing layer 412, and the second chitosan layer 413. The absorption layer 4 is pressed and covered by the edges of the guide layer 3 and the water-repellent layer 5.
[0034] Specifically, the deodorizing layer 412 is made of a mixture of chitosan fibers and water-absorbent resin SAP particles.
[0035] It is understandable that the absorption layer 4 is the core part of the chitosan dressing, and is mainly responsible for absorbing and locking the liquid exuded from the wound. Through the efficient absorption capacity of the absorption layer 4, the wound can be kept dry and clean, providing a good environment for wound healing.
[0036] It can be understood that the absorption layer 4 adopts a grid structure design, and the grid is filled with water-absorbent resin SAP particles. This design enables the absorption layer 4 to have excellent absorption speed and absorption capacity, and can quickly absorb thick liquid and lock it in the grid to prevent liquid from overflowing. At the same time, the SAP particles have strong water absorption performance and can maintain a dry state for a long time, reducing the frequency of changing the dressing.
[0037] In addition, the absorption layer 4 also includes the design of chitosan fiber and deodorant layer 412. Chitosan fiber is similar to the molecular structure of mucopolysaccharide matrix in the interstitial matrix, providing a favorable environment for the growth of skin cells. The deodorant layer 412 can effectively absorb and decompose the malodor emitted by the wound, improving the patient's use experience. This comprehensive design makes the absorption layer 4 not only have excellent absorption performance, but also can promote wound healing and improve the patient's comfort.
[0038] In one embodiment, the release layer 1 is made of polypropylene film or polyethylene film.
[0039] It can be understood that the release layer 1 can play the following roles:
[0040] Protection and isolation: Provide additional protection for chitosan dressings and isolate them from the external environment. During the manufacturing, storage and use of the dressing, the release layer 1 can prevent the dressing from being contaminated, worn or damaged, ensuring the integrity and effectiveness of the dressing. In addition, the release layer 1 can also prevent the dressing from adhering to other materials during packaging or transportation, making it easier to use.
[0041] Easy peelability: Provides easy peelability. When the user needs to use the chitosan dressing, the release layer 1 can be easily peeled off the dressing without damaging the structure or performance of the dressing. This easy peelability ensures the convenient use of the dressing and reduces the waste that may be generated during use.
[0042] Controlling viscosity: The viscosity of the dressing can be controlled to prevent it from being too sticky or difficult to fit. By adjusting the material and structure of the release layer 1, the adhesion of the dressing can be precisely controlled so that it can fit firmly on the wound and can be easily adjusted and replaced.
[0043] In one embodiment, the adhesive layer 2 is made of a silicone coil with perforations. The diameter of the perforations is 1-3 mm, and the specific diameter can be any value among 1 mm, 2 mm, and 3 mm.
[0044] It is understandable that the adhesive layer 2 in the chitosan dressing mainly plays the role of fixing and fitting. Its design purpose is to ensure that the dressing can fit tightly on the wound, prevent the dressing from shifting or falling off, and thus maintain the stability and cleanliness of the wound.
[0045] It is understandable that the adhesive layer 2 is made of a perforated silicone coil, which not only has excellent viscosity and can firmly adhere to the skin, but also the perforated design ensures the breathability of the dressing, preventing the wound from becoming stuffy and humid due to long-term coverage. This breathable design also helps to reduce the possibility of bacterial growth and reduce the risk of infection.
[0046] In addition, the slight stickiness of the adhesive layer 2 allows medical staff to easily adjust the position of the dressing to ensure that the dressing fits accurately. At the same time, the stickiness is not too strong, so that the patient can easily remove the dressing without damaging the skin, making it convenient to observe and check the healing of the wound.
[0047] In one embodiment, the guide layer 3 is made of any one of hydrophilic PP non-woven fabric, ES non-woven fabric, hydrophilic hot air non-woven fabric, and degradable PLA non-woven fabric.
[0048] It can be understood that the guiding layer 3 plays a role of liquid conduction in the chitosan dressing, and its main function is to quickly guide the liquid exuded from the wound to the absorption layer 4 to keep the wound dry and clean.
[0049] It can be understood that the guide layer 3 is made of hydrophilic PP non-woven fabric, ES non-woven fabric, hydrophilic hot air non-woven fabric or degradable PLA non-woven fabric, etc. These materials have excellent liquid conductivity and can quickly disperse the liquid from the wound and guide it to the lower absorption layer 4. Through this function of the guide layer 3, it can effectively prevent the liquid from accumulating on the wound surface, reduce the chance of bacterial growth, and thus facilitate wound healing.
[0050] In addition, the material of the guide layer 3 has good flexibility and air permeability, which can fit the shape of the wound and provide a comfortable wearing experience. At the same time, its good air permeability also helps to maintain air circulation around the wound and reduce the stuffiness caused by long-term coverage.
[0051] In one embodiment, the water-repellent layer 5 is made of a degradable polylactic acid water-repellent non-woven fabric layer or a degradable polylactic acid hydrophilic non-woven fabric layer.
[0052] It can be understood that the role of the water-repellent layer 5 in the chitosan dressing is to prevent liquid from penetrating from the absorbent layer 4 to the outside of the dressing and to maintain the overall dryness of the dressing, which is crucial for keeping the wound clean and preventing external bacteria from invading.
[0053] It is understandable that the water-repellent layer 5 is made of a degradable polylactic acid water-repellent non-woven fabric layer or a degradable polylactic acid hydrophilic non-woven fabric layer, which have excellent water-repellent properties and can effectively prevent liquid from passing through. At the same time, its degradable properties also meet environmental protection requirements and reduce pollution to the environment.
[0054] It can be understood that, through the action of the water-repellent layer 5, the chitosan dressing can quickly absorb the liquid exuded from the wound while keeping the outer side of the dressing dry to prevent the liquid from overflowing and contaminating the clothes. This helps to reduce the patient's discomfort and the difficulty of care, and improve the efficiency and effect of wound care.
[0055] In summary, the adhesive layer 2, the flow-guiding layer 3, the absorption layer 4 and the water-repellent layer 5 work together in the chitosan dressing to achieve the fixing, conduction, absorption and waterproofing functions of the dressing. The chitosan dressing provides a dry, clean and healing environment for the wound. At the same time, the degradable characteristics of the dressing also meet environmental protection requirements and provide a sustainable solution for the development of the wound care field.
[0056] On the other hand, the present application provides a medical product, including the chitosan dressing described above. The medical product can have the following effects:
[0057] Promote wound healing: By keeping wounds dry, clean and providing a suitable microclimate, medical supplies help accelerate the wound healing process.
[0058] Prevent infection: The use of antimicrobial agents can effectively reduce bacterial growth, reduce the risk of infection, and protect wounds from external pathogens.
[0059] High Comfort: Soft and breathable material provides a comfortable wearing experience, reducing discomfort caused by prolonged use.
[0060] Convenience and ease of use: Medical supplies are usually designed to be easy to use, such as easy-to-peel release layers, easy-to-adjust adhesives, etc., to facilitate patient self-care and replacement.
[0061] The above is a specific description of the preferred implementation of the present application, but the invention of the present application is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent modifications or substitutions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.
Claims
1. A high-absorption, degradable chitosan dressing, characterized in that: It comprises a release layer (1), an adhesive layer (2), a flow-guiding layer (3), an absorption layer (4), and a water-repellent layer (5) which are attached together in sequence; The absorption layer (4) is provided with a grid structure, and water-absorbent resin SAP particles are arranged in the grid structure.
2. The chitosan dressing according to claim 1, characterized in that The absorption layer (4) comprises a first chitosan layer (411), a deodorizing layer (412), and a second chitosan layer (413) which are sequentially attached together, and a wet-strength paper (414) which covers the first chitosan layer (411), the deodorizing layer (412), and the second chitosan layer (413).
3. The chitosan dressing according to claim 1, characterized in that The absorption layer (4) is laminated and covered by the edge of the flow-guiding layer (3) and the edge of the water-repellent layer (5).
4. The chitosan dressing according to claim 1, characterized in that The release layer (1) is made of polypropylene film or polyethylene film.
5. The chitosan dressing according to claim 1, characterized in that: The adhesive layer (2) is made of a silicone coil with perforations.
6. The chitosan dressing according to claim 5, characterized in that The aperture of the perforation is 1-3 mm.
7. The chitosan dressing according to claim 1, characterized in that The guide layer (3) is made of any one of hydrophilic PP non-woven fabric, ES non-woven fabric, hydrophilic hot air non-woven fabric, and degradable PLA non-woven fabric.
8. The chitosan dressing according to claim 1, characterized in that: The water-repellent layer (5) is selected from a degradable polylactic acid water-repellent non-woven fabric layer and a degradable polylactic acid hydrophilic non-woven fabric layer.
9. Medical supplies, characterized in that The chitosan dressing comprises the chitosan dressing according to any one of claims 1 to 8.