Dual-function combined bandage for orthopedic fixation and preparation method of dual-function combined bandage

Abstract

The invention relates to the technical field of medical textiles, and discloses a dual-function combined bandage for orthopedic fixation and a preparation method thereof.The combined bandage comprises surface layer warp yarn, first weft yarn and second weft yarn are arranged on the outer layer of the surface layer warp yarn, and bottom layer warp yarn is arranged on the outer layer of the first weft yarn and the outer layer of the second weft yarn; one side of the outer layer of the first weft yarn is arranged on one side of the second weft yarn, and the invention further provides a preparation method of the difunctional combined bandage for orthopedic fixation. Selecting surface layer yarns and bottom layer yarns; a double-layer weaving process is adopted; forming a double-layer fabric with a hollow structure; performing water-repellent assistant treatment on the surface fabric; and performing hydrophilic treatment on the bottom layer fabric. Through the design that the upper layer is hydrophobic and the lower layer is hydrophilic, the waterproof and breathable dual functions are effectively achieved. The bandage can keep good air permeability while having a fixing effect, and the problem of moisture accumulation caused by poor air permeability of a traditional bandage is solved.

Description

Technical Field

[0001] The invention relates to the technical field of medical textiles, in particular to a dual-function combined bandage for orthopedic fixation and a preparation method thereof. Background Art

[0002] In the field of orthopedics, bandages are a common fixation material, widely used to treat injuries such as fractures and sprains. However, traditional bandages have many shortcomings in actual use. Most existing bandage materials use a single fiber or a single coating technology, which can often only meet the needs of a single function, resulting in performance limitations. For example, while traditional bandages can provide a basic fixation effect, they often perform poorly in terms of breathability. Due to the lack of sufficient breathability, patients can easily cause skin moisture when wearing them for a long time, and may even cause allergies or infections, causing discomfort and health risks to patients.

[0003] Furthermore, existing waterproof coatings or treatments often rely on simple coatings or chemical treatments. While these methods offer short-term waterproofing, they gradually lose their effectiveness with prolonged use or in humid environments, compromising the bandage's securement and comfort. For patients who require long-term bandage wear, a balance between waterproofness and breathability is crucial, but conventional technologies struggle to achieve the ideal balance.

[0004] Furthermore, existing bandage materials often struggle to achieve both support and comfort. Traditional bandages often utilize tightly knit fabrics. While this structure provides strong fixation, its lack of cushioning often results in significant pressure on the affected area, leading to increased discomfort. This lack of effective cushioning and support means that conventional bandages still have significant room for improvement in terms of comfort. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a dual-function combination bandage for orthopedic fixation and a preparation method thereof, which solves the problems of the existing orthopedic bandages in terms of air permeability, waterproofness and comfort.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a dual-function combination bandage for orthopedic fixation, comprising: The outer layer of the surface warp yarn is provided with a first weft yarn and a second weft yarn, the outer layer of the first weft yarn and the second weft yarn is provided with a bottom warp yarn, and the outer layer side of the first weft yarn is provided on one side of the second weft yarn.

[0007] The preparation method of a dual-function combination bandage for orthopedic fixation comprises the following steps: Select surface yarn and bottom yarn, where the surface yarn is made of hydrophobic material and the bottom yarn is made of hydrophilic material; Through the double-layer weaving process, the electronic jacquard machine is used to weave with 24 heald frames, and the density ratio of the surface warp and weft yarns to the bottom warp and weft yarns is controlled. The double-layer fabric with a hollow structure is formed to ensure that the interweaving points between the surface fabric and the bottom fabric form a stable air cavity network; The surface fabric is treated with a water-repellent additive and after drying, the porosity of the fabric is retained at 30-35%; The bottom fabric is treated with hydrophilicity to adjust its hydrophilic properties and ensure the air permeability and softness of the fabric.

[0008] Preferably, the surface yarn is made of polyester fiber or polyvinyl acetal fiber.

[0009] Preferably, the bottom yarn is made of cotton or viscose fiber.

[0010] Preferably, the warp tension difference of the double-layer weaving process is controlled between ±5 cN, and the electronic jacquard machine is a QH-C new high-speed electronic jacquard machine.

[0011] Preferably, the density ratio of the surface warp yarn to the bottom warp yarn is 2:1 to 4:1, and the density ratio of the surface warp and weft yarn to the bottom weft yarn is 1.5:1 to 3:1.

[0012] Preferably, the hollow structure of the combined bandage is a tubular structure with a tube diameter ranging from 0.5 to 2 mm, and the spacing between the interweaving points of the surface fabric and the bottom fabric is 3 to 5 times the length of the tube diameter.

[0013] Preferably, the water-repellent additive is a fluorine-containing acrylate copolymer, which contains a copolymer structure of a fluoroalkyl acrylate monomer and an acrylic monomer. The mass concentration of the fluorine-containing acrylate copolymer is 1.0-3.0%, the roll-off rate is 60-85%, and the drying-treated fabric is dried at 120-150°C for 2-5 minutes.

[0014] Preferably, the hydrophilic treatment uses a non-ionic surfactant, which is fatty alcohol polyoxyethylene ether, with a concentration of 0.5-1.5 wt%, a treatment time of 1-3 minutes, and a treatment temperature of 40-60°C.

[0015] A method for using a dual-function combination bandage for orthopedic fixation comprises the following steps: Preparation: Lightly cover the affected area with a layer of gauze or sponge roll as an isolation layer; Use plaster slurry or treat the bandage with polyurethane prepolymer; Wrap the treated bandage spirally around the affected area, controlling the thickness of the single layer to 0.8-1.2mm; The splint structure is formed by curing with body temperature or light.

[0016] The present invention provides a dual-function combination bandage for orthopedic fixation and a preparation method thereof. It has the following beneficial effects: 1. This invention utilizes a double-layer yarn structure, with a hydrophobic upper layer and a hydrophilic lower layer, effectively achieving the dual functions of waterproofness and breathability. This technical solution enables the bandage to provide excellent fixation while maintaining good breathability, avoiding the moisture accumulation problem caused by the poor breathability of traditional bandages. Compared with existing bandages made of a single material, this invention significantly improves patient comfort, reduces skin moisture, and enhances the user experience.

[0017] 2. The hollow tubular structure of this invention enhances the bandage's support and cushioning properties, further optimizing its fixation. Compared to traditional dense fabric structures, this invention can better mitigate the direct effects of external pressure on the affected area, effectively alleviating the burden on muscles and bones, and providing a more comfortable fixation effect. This innovative design overcomes the limitations of traditional bandages, which only provide fixation but lack comfort.

[0018] 3. This invention utilizes a fluorinated copolymer finishing technique to achieve a durable surface water-repellent effect, preventing the gradual loss of waterproofing seen in traditional bandages. Compared to conventional coatings or treatments, this fluorinated treatment effectively prolongs the bandage's waterproofing, maintaining high waterproofing even in humid environments and addressing the performance degradation of existing bandages during use.

[0019] 4. The plaster or polyurethane prepolymer is fixed through a mesoporous tubular structure. Compared with the model of plaster combined with gauze, it is lighter and thinner overall, easier to operate and form, and the pressure on the patient's limbs is lighter; compared with ordinary textile materials and textiles with tissue structures, after being impregnated with polyurethane prepolymer, it is easier to shape and is cleaner and tidier to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective view of the present invention; Figure 2 is a flow chart of the preparation method of the present invention; Figure 3 The figure is a flow chart of the method of using the present invention.

[0021] Among them, 1. surface warp yarn; 2. bottom warp yarn; 3. first weft yarn; 4. second weft yarn. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the present specification. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Please see the attached Figure 1 The embodiment of the present invention provides a dual-function combination bandage for orthopedic fixation, comprising: The surface warp yarn 1, the outer wall of the surface warp yarn 1 is provided with a first weft yarn 3 and a second weft yarn 4, the outer wall of the first weft yarn 3 and the second weft yarn 4 is provided with a bottom warp yarn 2, and one side of the outer wall of the first weft yarn 3 is provided on one side of the second weft yarn 4; specifically, the first weft yarn 3 and the second weft yarn 4 are woven with the surface warp yarn 1 and the bottom warp yarn 2, so that the first weft yarn 3 is first woven with the surface warp yarn 1, and then crossed with the second weft yarn 4 to weave the bottom warp yarn 2, and the second weft yarn 4 is woven with the bottom warp yarn 2 and crossed with the first weft yarn 3 and then woven with the surface warp yarn 1, so that the surface warp yarn 1 and the bottom warp yarn 2 form a hollow structure.

[0024] Please see the attached Figure 2 Preparation method of dual-function combination bandage for orthopedic fixation Example 1 The surface yarn is selected as polyester fiber and the bottom yarn is selected as cotton fiber.

[0025] A QH-C high-speed electronic jacquard machine with 24 heald frames was used. The surface warp to bottom warp density ratio was set at 3:1, and the surface weft to bottom weft density ratio was set at 2:1. The warp tension difference was controlled at ±3 cN during weaving.

[0026] A double-layer weaving process is used to form the fabric into a hollow tubular structure, the tube diameter is controlled to 1.0mm, and the interlacing point spacing is set to 4mm.

[0027] After weaving, the fabric was treated with a water-repellent finish and then padded with a 2.0% fluorinated acrylate copolymer (composed of fluoroalkyl acrylate and acrylic monomers) at a 75% padded rate. The fabric was then dried at 130°C for 3 minutes.

[0028] The bottom layer was then hydrophilized using a fatty alcohol polyoxyethylene ether nonionic surfactant with a working solution concentration of 1.0 wt%, a treatment temperature of 50° C., a treatment time of 2 minutes, and a drying temperature of 140° C. for 4 minutes.

[0029] Example 2 The surface yarn is selected as polyvinyl acetal fiber and the bottom yarn is selected as viscose fiber.

[0030] The warp yarn density ratio of the surface layer to the bottom layer was set to 4:1, and the weft yarn density ratio was set to 1.5:1. The warp yarn tension was controlled within the range of ±5 cN.

[0031] The double-layer fabric is woven by an electronic jacquard machine to construct a hollow structure with a tube diameter of 2.0 mm, and the spacing between the interweaving points is controlled to be 5 times the tube diameter.

[0032] In the water repellent treatment stage, a fluorinated acrylate copolymer was selected, the treatment liquid concentration was set to 1.5%, the rolling rate was controlled to 80% by a rolling mill, the drying temperature was set to 150°C, and the treatment time was 2 minutes.

[0033] The hydrophilic treatment uses non-ionic fatty alcohol polyoxyethylene ether, the treatment liquid concentration is 0.8wt%, the treatment temperature is set at 45°C, the treatment time is 1 minute, and after treatment, it is dried again at a temperature of 130°C for 3 minutes.

[0034] Example 3 The surface yarn is made of polyester fiber and the bottom yarn is made of cotton fiber.

[0035] During weaving, the density ratio of the surface warp yarn to the bottom warp yarn is set to 2:1, the weft yarn density ratio is 3:1, the warp yarn tension difference is controlled at ±4cN, and the QH-C high-speed electronic jacquard machine is used for weaving.

[0036] The hollow structure is designed with a tube diameter of 1.5 mm, and the interlacing point spacing is set to 4.5 mm.

[0037] The surface layer was subjected to water repellent treatment using a 3.0% by mass concentration fluorinated acrylate copolymer and a 70% roll-off rate. The treated fabric was dried at 120° C. for 5 minutes.

[0038] The hydrophilic finishing was performed using a 1.5 wt % fatty alcohol polyoxyethylene ether solution at 60° C. for 1 minute and a drying temperature of 140° C. for 3 minutes.

[0039] Example 4 The surface yarn is polyvinyl acetal fiber and the bottom yarn is viscose fiber.

[0040] In the weaving parameters, the surface and bottom warp yarn density ratio was set to 3.5:1, the weft yarn density ratio was 2:1, and the warp yarn tension difference was ±2 cN.

[0041] During weaving, a hollow structure with a tube diameter of 0.5 mm is formed, and the interlacing point spacing is set to 1.5 mm.

[0042] The water repellent finishing was performed using a 1.0% mass concentration of fluoroacrylate copolymer finishing liquid. After the liquid was squeezed, the squeeze rate was controlled to be 85%. The drying process was performed at 150° C. for 2 minutes.

[0043] The hydrophilic treatment step uses 0.5 wt% fatty alcohol polyoxyethylene ether, the temperature is controlled at 40°C, the treatment time is 3 minutes, and finally it is dried at 120°C for 2 minutes.

[0044] Comparative Example 1: Compared with Example 1, the difference is that the water-repellent finishing treatment of the surface layer is cancelled and the fluorine-containing acrylate copolymer is not used for treatment. The rest are the same.

[0045] Comparative Example 2: Compared with Example 2, the difference is that the surface yarn is replaced by polyvinyl acetal fiber with cotton fiber, and the selection of hydrophobic material is not reflected. The rest are the same. Comparative Example 3: Compared with Example 3, the difference is that the finishing agent used for water repellent treatment is changed to fluorine-free polyacrylate additives. The rest are the same. Comparative Example 4: Compared with Example 4, the difference is that the warp yarn density ratio of the surface layer to the bottom layer is changed to 1:1, and the rest are the same Experiment 1: Surface water repellency test Purpose of the experiment: The effect of water repellent finishing treatment on the water repellent properties of the fabric surface was verified between Example 1 and Comparative Example 1, thereby reflecting the key role of the surface finishing process in constructing a functional layered system.

[0046] Test sample: Example 1 Fabric sample: a double-layer composite bandage treated with a fluorinated acrylic ester finishing agent.

[0047] Comparative Example 1 fabric sample: no water-repellent treatment was performed, and the rest of the structure was consistent with the process.

[0048] Experimental methods: Static contact angle test; Use a contact angle meter (such as Dataphysics OCA series); The sample size was cut to 30 mm × 30 mm; Deionized water was added to the fabric surface using a precision microsyringe, with the volume of each drop controlled at 5 μL; Photograph and record the water drop contact angle value within 10 seconds after dripping, repeat the test 5 times, and take the average value.

[0049] Roll angle test: Fix the fabric sample horizontally on the adjustable angle test platform; Add water drops under the same conditions; Slowly adjust the platform angle and record the minimum inclination angle required for the water drop to start rolling (±1° accuracy); Each sample was tested 3 times.

[0050] Visual spray test (auxiliary): Use AATCC22 standard method to evaluate spray level; Place the sample on the specimen fixture and fix it vertically; Use 250mL of water to spray from a specified height and assess the grade (grade 1-5) based on the residual water droplets.

[0051] Table 1 Test results of surface water repellency of Example 1 and Comparative Example 1: Sample No. Static contact angle (°) Roll angle (°) Spray grade Example 1-1 128.6 14 5 Example 1-2 132.1 12 4-5 Examples 1-3 127.4 13 5 Examples 1-4 130 11 5 Comparative Example 1-1 94.2 42 2 Comparative Example 1-2 97.8 46 2-3 Comparative Examples 1-3 89.7 49 1-2 Comparative Examples 1-4 91.3 44 2 Summarize: The surface of the fabric treated with the fluorinated finishing agent exhibited significant water-repellent properties in terms of both droplet contact angle and roll-off angle. This high contact angle and low roll-off angle indicate that a stable hydrophobic microstructure has formed on the fabric surface, effectively reducing the adhesion between the droplet and the fiber interface, allowing the liquid to quickly roll off the surface and avoid penetration and retention. In contrast, untreated samples failed to develop a similar microstructure, resulting in rapid diffusion and adsorption of the liquid onto the fiber surface.

[0052] This performance difference is attributed to the low-surface-energy groups introduced by the finishing agent onto the fiber surface, particularly the molecularly oriented layer formed by the fluoroalkyl segments. This molecular layer creates a highly regular and liquid-repellent interfacial region on the fiber surface, not only causing the droplet to spherically shrink at the static contact angle level but also enabling the droplet to rapidly detach during dynamic response.

[0053] Experiment 2: Hydrophobic fiber substitution test Purpose of the experiment: This experiment aimed to verify the effects of different fiber base materials on the overall water repellency of fabrics. By comparing samples using hydrophobic polyvinyl acetal fiber and hydrophilic cotton fiber as the surface material, we determined whether the selection of fiber raw materials is essential for the fabric's water repellency.

[0054] Test sample: Example 2 Sample: The surface layer is polyvinyl acetal fiber, and the bottom layer is hydrophilically treated in the same manner.

[0055] Comparative Example 2 sample: the surface material was replaced with cotton fiber, and other treatments remained the same.

[0056] Experimental methods: Water absorption test (static immersion method): Cut fabric samples with a size of 50 mm × 50 mm; Soak the sample in constant temperature water for 30 seconds and then take it out; Use filter paper to remove the free water on the surface and weigh it to calculate the water absorption rate; Water absorption rate = (wet weight - dry weight) / dry weight × 100%; Each sample was tested 3 times and the average value was taken.

[0057] Contact angle test: The same method as in Experiment 1 was used to measure the static contact angle of the water drop on the surface using a contact angle meter; Each sample was tested 3-5 times.

[0058] Visual observation (assisted): Water drop observation method: Observe the spreading or rolling state of water droplets with the naked eye, take photos to record the changing trend, and assist in subjective judgment of surface wettability.

[0059] Table 2 Comparison of water absorption of polyvinyl acetal fiber and cotton fiber surface fabric Summarize: Samples using polyvinyl acetal fiber as the surface material exhibited excellent water-repellent properties, with contact angles generally exceeding 110°. In addition, they exhibited significant droplet retention and rolling-off in the dripping state, indicating that the material itself possesses low surface energy and is not easily wetted by water molecules. This property already possesses basic hydrophobicity at the fiber level, playing a synergistic role in subsequent finishing treatments. In contrast, cotton fibers are naturally hydrophilic, easily absorbing liquids and inducing diffusion, making it difficult to form droplets, which fundamentally limits the construction of water-repellent functionality.

[0060] From a mechanistic perspective, the hydrophilic and hydrophobic properties of fiber materials primarily depend on whether their molecular chain structure contains polar groups. The hydroxyl groups in cotton fibers form strong hydrogen bonds with water molecules, leading to rapid liquid spreading and penetration. However, after acetalization, the number of hydroxyl groups in polyvinyl acetal fibers is significantly reduced, and the molecular chains form a more stable non-polar structure, which significantly suppresses the increase in interfacial energy and reduces the affinity between liquid and fiber. This characteristic of the material itself makes it easier to construct an effective hydrophobic interface, helping to form a gradient liquid response across the fabric.

[0061] This invention emphasizes the synergy between surface material selection and finishing methods in its structural design. By selecting hydrophobic fibers as the foundation, the subsequent surface functional finishing effects are fully realized. In a functional layer composite system, the surface layer not only plays the initial contact response to liquid but also determines the droplet's behavior.

[0062] Experiment 3: Comparative test of finishing agent types Purpose of the experiment: Verify the performance differences between fluorine-containing finishing agents and fluorine-free polyacrylate additives in constructing the fabric water-repellent layer, and further confirm the actual impact of the type of finishing agent on the surface water-repellent properties.

[0063] Test sample: Example 3: Sample: Surface treated with a fluorinated acrylic finishing agent; Comparative Example 3 sample: fluorine-free polyacrylate additives were used as an alternative treatment, and other structural processes were the same.

[0064] Experimental methods: Static contact angle test: The operation method is the same as that of Experiment 1, using a contact angle meter; Each sample was tested 3-5 times and the average value was taken.

[0065] Spray test rating (AATCC22): Hang the fixed sample cloth vertically and spray 250mL of water according to the standard; Evaluate the spray grade based on the residual state of water droplets (1-5, 5 being the most water-repellent); Each sample was measured 3 times.

[0066] Rolling angle test (auxiliary comparison): After dripping water onto the fabric surface, adjust the platform angle and observe the minimum angle at which the water drop starts to roll; Assist in determining the dynamic wetting behavior of water droplets.

[0067] Table 3 Comparative data on water repellency of fabrics treated with fluorine-containing and fluorine-free finishing agents Summarize; The results further validated the key role of surface finishes in establishing fabric water repellency. Fluorinated acrylic finishes, in particular, exhibited significantly higher contact angles, smaller roll-off angles, and higher spray ratings in treated samples. This performance advantage stems from the fluorine segments contained in their molecular structure, which possess extremely low surface energy and can effectively construct a highly liquid-repellent molecular orientation layer, significantly enhancing the repulsion of droplets on the fabric surface. In contrast, fluorinated acrylic finishes, while possessing a certain degree of hydrophobicity, are unable to form a stable hydrophobic interface on the finished fabric due to the uneven distribution of their hydrophobic groups and their high surface energy, resulting in lower water repellency.

[0068] From a microscopic perspective, fluorinated finishing agents form a layer of regularly arranged low-polarity chain segments on the fabric surface. This layer not only significantly reduces the adhesion between droplets and fibers but also maintains the rollability of droplets in a dynamic state, reducing surface retention and diffusion. This stable microstructure creates a "water-repellent barrier" on the fabric surface, helping to isolate external liquids from the surface and creating the prerequisites for subsequent liquid diversion and layered absorption. Fluorine-free finishing systems, however, are limited by the flexibility of their molecular chains and the presence of residual polar groups, making it difficult to form a microscopic liquid-repellent structure with the same effectiveness.

[0069] Experiment 4: Test on the influence of warp density ratio on flow path Purpose of the experiment: This experiment aimed to investigate the effect of the warp density ratio of the top and bottom fabrics on liquid diversion paths and efficiency. By varying the top and bottom densities, the authors observed their ability to regulate liquid movement direction, distribution velocity, and absorption capacity, thereby validating the role of yarn structural parameters in the functional development of the present invention.

[0070] Test sample: Example 4 sample: the warp yarn density ratio of the surface layer to the bottom layer is 1.3:1; Comparative Example 4 sample: the warp yarn density ratio was adjusted to 1:1, and the others remained the same.

[0071] Experimental methods: Liquid diversion efficiency test: Place the fabric sample (150 mm × 100 mm) horizontally; Add dyed water drops to the center, 0.5 mL at a time; Record the time required for the liquid to diffuse to both sides (to a distance of 50 mm); Each sample was tested 3 times and the average value was taken.

[0072] Absorption directionality observation: At the same time, observe whether the liquid preferentially expands along a certain direction of the fabric; Use a high-resolution camera to record the diffusion morphology and boundary contours to assist in determining the diversion characteristics.

[0073] Cross-sectional area staining (auxiliary): After the addition, the sample was allowed to stand for 10 minutes and then sliced ​​to observe the cross-sectional range and layers of liquid penetration.

[0074] Table 4 Comparison of the effects of different specific density structures on liquid conductivity Summarize; The warp density ratio plays a significant role in guiding the construction of functional flow paths. When a certain density difference exists between the surface and base layers, especially when the surface density is higher, the fabric forms gradient channels throughout, effectively regulating the direction of liquid movement. Upon contact with the surface, droplets are rapidly guided toward the lower-density base layer, creating a "one-way permeability" effect. This prevents liquid from stagnating and diffusing on the surface, keeping the surface dry and improving overall liquid management performance.

[0075] From a structural mechanism perspective, the warp density of the fabric determines the tightness of the fiber arrangement and the distribution of the capillary structure. The denser surface yarns not only enhance the surface support capacity during initial contact, but also inhibit the lateral expansion of the liquid by creating smaller pores, prompting the liquid to preferentially penetrate the less dense bottom layer. In the bottom layer, the warp yarn spacing is relatively large, providing a diffusion path with lower resistance for the liquid, thereby achieving directional control within the fabric. This gradient structure formed by the density distribution forms a capillary guide tube-like action path on the microscale, improving the diversion rate and directional stability.

[0076] The device for the real-time sliding ultra-short-term prediction model algorithm based on frequency data and phase data described below and the real-time sliding ultra-short-term prediction model algorithm based on frequency data and phase data described above can correspond to each other.

[0077] Please see the attached Figure 3 The present invention also provides a method for using a dual-function combination bandage for orthopedic fixation.

[0078] Example 1: Using gypsum slurry Preparation: Gently cover the injured area with a layer of sanitary gauze to form an isolation layer and avoid direct contact with the skin.

[0079] Prepare gypsum slurry with a water-cement ratio of 0.6:1.

[0080] 2% hydroxypropyl methylcellulose was added as a retarder to control fluidity.

[0081] Stir evenly as required to ensure the slurry is uniform and free of bubbles.

[0082] Inject the prepared plaster slurry into the bottom mesh surface of the bandage so that the slurry fully fills the hollow layer.

[0083] The pouring pressure is set to ≤0.1MPa to ensure uniform distribution of the slurry and achieve the best curing effect.

[0084] Wrapping bandage: Wrap the treated bandage in a spiral manner around the injured area, controlling the thickness of each layer between 0.8-1.2mm to ensure a good fixation effect.

[0085] The bandage is cured at body temperature, which allows it to harden rapidly under the action of the body's own heat to form a splint structure.

[0086] Summarize; The application of gypsum slurry within the hollow structure of the bandage provides a high degree of support, effectively immobilizing the injured area. The surface material is designed to be water-repellent, preventing fluid from escaping the bandage while also ensuring that the polymer liquid or fluid-like plaster inside is not squeezed out when external force is applied. This design not only enhances the bandage's stability and ensures accurate locking of the therapeutic dose, but also improves operational convenience and reduces disruption to the user during treatment.

[0087] Secondly, the inner layer of the bandage is made of hydrophilic material, which can effectively lock in polymer fluid or fluid-like plaster. This hydrophilic material's properties allow it to form good adhesion when in contact with plaster slurry, thereby enhancing the bond between the bandage and the injured area during the curing process. Through this tight bond, the bandage can fully utilize the adhesion and support functions of the fluid-like plaster while fixing the injured area, greatly improving the effect of orthopedic fixation and ensuring comfort during treatment. Example 2: Using polyurethane prepolymer Preparation: Lightly cover the injured area with a layer of sanitary gauze to create a barrier.

[0088] Choose a polyurethane prepolymer that contains 10-15% nano-silica aerogel to provide better support and cushioning properties.

[0089] The viscosity of the prepolymer was adjusted to 500-800 cps and maintained at room temperature (about 25°C).

[0090] Dip the bandage into the polyurethane prepolymer, ensuring that the bandage fully absorbs the prepolymer.

[0091] After impregnation, use a scraper to scrape off excess liquid on the surface to ensure that the bandage surface is smooth and no excess liquid remains.

[0092] Wrap the treated bandage spirally around the injured area, controlling the thickness of each layer to 0.8-1.2mm to ensure firmness and comfort of fixation.

[0093] You can choose to use light curing to speed up the curing time and ensure that the bandage quickly forms a strong splint structure.

[0094] Summarize; The use of polyurethane prepolymers provides new functional enhancements to dual-function combination bandages, particularly for the overall effectiveness of orthopedic fixation. Before being applied to the hollow structure of the bandage, the polyurethane prepolymer undergoes a specific viscosity adjustment, allowing it to fully penetrate and fill the bandage's internal space while in its liquid state. This process ensures that the polyurethane prepolymer adheres tightly to the bandage structure, forming a uniformly distributed support layer, providing strong fixation support for the injured area and enhancing the stability of the treatment.

[0095] After the polyurethane prepolymer is applied, the hydrophilic material within the bandage interacts well with the fluid polyurethane. This hydrophilic material not only helps lock the polyurethane's molecular structure but also maintains its fluidity during the curing process, ensuring that the polyurethane is evenly distributed and forms a solid, integrated layer. This combination of hydrophilic and polyurethane allows the bandage to not only adapt to the patient's changing shape but also effectively seal the fluid polyurethane, preventing it from leaking during the curing process. This seamless integration of shaping and support is achieved.

[0096] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A dual-function combination bandage for orthopedic fixation, characterized in that: include: A surface warp yarn (1), wherein the outer layer of the surface warp yarn (1) is provided with a first weft yarn (3) and a second weft yarn (4), the outer layers of the first weft yarn (3) and the second weft yarn (4) are provided with a bottom warp yarn (2), and one side of the outer layer of the first weft yarn (3) is provided on one side of the second weft yarn (4).

2. A method for preparing a dual-function combination bandage for orthopedic fixation, for preparing the dual-function combination bandage for orthopedic fixation according to claim 1, characterized in that: The following steps are included: Select surface yarn and bottom yarn, where the surface yarn is made of hydrophobic material and the bottom yarn is made of hydrophilic material; Through the double-layer weaving process, the electronic jacquard machine is used to weave with 24 heald frames, and the density ratio of the surface warp and weft yarns to the bottom warp and weft yarns is controlled. The double-layer fabric with a hollow structure is formed to ensure that the interweaving points between the surface fabric and the bottom fabric form a stable air cavity network; The surface fabric is treated with a water-repellent additive and after drying, the porosity of the fabric is retained at 30-35%; The bottom fabric is treated with hydrophilicity to adjust its hydrophilic properties and ensure the air permeability and softness of the fabric.

3. The method for preparing the dual-function combination bandage for orthopedic fixation according to claim 2, characterized in that: The surface yarn is made of polyester fiber or polyvinyl acetal fiber.

4. The method for preparing the dual-function combination bandage for orthopedic fixation according to claim 2, characterized in that: The bottom yarn is made of cotton or viscose fiber.

5. The method for preparing the dual-function combination bandage for orthopedic fixation according to claim 2, characterized in that: The warp tension difference of the double-layer weaving process is controlled between ±5cN, and the electronic jacquard machine is a QH-C new high-speed electronic jacquard machine.

6. The method for preparing the dual-function combination bandage for orthopedic fixation according to claim 2, characterized in that: The density ratio of the surface warp yarn to the bottom warp yarn is 2:1 to 4:1, and the density ratio of the surface warp and weft yarn to the bottom weft yarn is 1.5:1 to 3:

1.

7. The method for preparing the dual-function combined bandage for orthopedic fixation according to claim 2, characterized in that: The hollow structure of the combined bandage is a tubular structure with a tube diameter ranging from 0.5 to 2 mm. The spacing between the interweaving points of the surface fabric and the bottom fabric is 3 to 5 times the length of the tube diameter.

8. The method for preparing the dual-function combination bandage for orthopedic fixation according to claim 2, characterized in that: The water-repellent auxiliary agent is a fluorine-containing acrylate copolymer, which contains a copolymer structure of a fluoroalkyl acrylate monomer and an acrylic monomer. The mass concentration of the fluorine-containing acrylate copolymer is 1.0-3.0%, and the residual rate is 60-85%. The drying-treated fabric is dried at 120-150°C for 2-5 minutes.

9. The method for preparing a dual-function combination bandage for orthopedic fixation according to claim 2, characterized in that: The hydrophilic treatment uses a non-ionic surfactant, which is fatty alcohol polyoxyethylene ether, with a concentration of 0.5-1.5wt%, a treatment time of 1-3 minutes, and a treatment temperature of 40-60°C.

10. A method for using a dual-function combination bandage for orthopedic fixation, according to the dual-function combination bandage for orthopedic fixation according to claim 1, characterized in that: The following steps are included: Preparation: Lightly cover the affected area with a layer of gauze or sponge roll as an isolation layer; Use plaster slurry or treat the bandage with polyurethane prepolymer; Wrap the treated bandage spirally around the affected area, controlling the thickness of the single layer to 0.8-1.2mm; The splint structure is formed by curing with body temperature or light.

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