Sterilizing, breathable, self-liquid-absorbing and anti-adhesion dressing and preparation method thereof

Abstract

The invention provides a sterilizing, breathable, self-liquid-absorbing and anti-adhesion dressing and a preparation method thereof. The dressing comprises a hydrophobic inner layer and a hydrophilic surface layer, the hydrophilic surface layer is formed by weaving hydrophilic warp yarns and surface layer weft yarns; the hydrophobic inner layer is composed of a plurality of juncus effuses which are uniformly distributed along the weft direction; and the junci medulla and the warp yarns of the hydrophilic surface layer are fixed through a specific binding double-layer weave weaving structure. Through a specific fabric weave structure weaving method and mutual cooperation of different layer structures and raw materials, the junci medulla is firmly fixed to the hydrophobic layer, and the high-performance dressing of a specific structure is obtained; the dressing is reasonable in design and simple in structure, facilitates absorption of wound moisture, promotes wound healing, has a good anti-inflammation effect, and can be widely applied to anti-inflammation and binding materials of trauma such as surgical incisions, burns and scalds and repair of wound surfaces.

Description

Technical Field

[0001] The present invention relates to the technical field of wound repair materials, and particularly to a bactericidal, breathable, self-absorbent, anti-adhesive dressing and a preparation method thereof. Background Art

[0002] As the natural barrier of the human body, when the skin suffers from external injuries such as abrasions, skin ulcers or burns, the tissue structure will be damaged, which may cause bacterial infections and even serious complications. In order to achieve rapid wound healing, many medical dressings have been developed in recent years, including biofilms, porous sponges and functional hydrogels. Among them, hydrogels have attracted much attention due to their advantages such as maintaining a moist wound healing environment, reducing wound temperature, promoting the diffusion and penetration of nutrients; however, these hydrogels make the wound environment overly moist after absorbing liquids, which is not conducive to the continuous absorption of wound exudates.

[0003] With the development of science, people have realized that dressings not only cover the wound, but also must help the wound heal. A wound repair dressing with unidirectional moisture conduction performance is a novel dressing developed in recent years, which can be widely applied to various ulcer wounds, wounds caused by trauma, burn and scald wounds, and chemical burn wounds, and is suitable for various populations at the same time. It is expected to become a substitute for traditional hemostatic dressings and has a broad market prospect.

[0004] The patent with application number CN201810088552.0 discloses a moisture-conducting and moisturizing medical dressing and a preparation method thereof. The medical dressing includes a moisture-conducting skin-friendly layer, a moisturizing fluffy layer, and a moisture-absorbing dense layer. The moisture-conducting skin-friendly layer is a long filament ultra-fine fiber non-woven fabric, the moisturizing fluffy layer is a thick denier bio-based fiber layer, and the moisture-absorbing dense layer is a mixture of a fine denier bio-based fiber layer and alginate fibers; the medical dressing can quickly absorb tissue fluid through the ultra-fine fiber layer and transfer it to the moisture-absorbing dense layer through the moisturizing fluffy layer to form a unidirectional transmission of tissue fluid. However, this moisture-conducting and moisturizing medical dressing has a three-layer structure, the structure is relatively complex, and there are defects in the instability of the multi-layer composite structure, which further affects its performance.

[0005] In view of this, it is necessary to design an improved bactericidal, breathable, self-absorbent, anti-adhesive dressing and a preparation method thereof to solve the above problems. Summary of the Invention

[0006] The object of the present invention is to provide a bactericidal, breathable, self-absorbent and anti-adhesive dressing and its preparation method. The dressing includes a hydrophobic inner layer and a hydrophilic outer layer; the hydrophilic outer layer is woven from hydrophilic surface warp yarns and surface weft yarns, and the hydrophilicity of the surface weft yarns is better than that of the surface warp yarns; the hydrophobic inner layer is several rushes evenly distributed along the weft direction; the rushes are fixed to the warp yarns in the longitudinal direction of the hydrophilic outer layer through a specific interlacing double-layer fabric structure, and through the specific interlacing structure, the rushes are firmly fixed on the hydrophilic outer layer to obtain a high-performance dressing with a specific structure.

[0007] To achieve the above object of the invention, the present invention provides a bactericidal, breathable, self-absorbent and anti-adhesive dressing, including a hydrophobic inner layer and a hydrophilic outer layer; the hydrophilic outer layer is woven from hydrophilic surface warp yarns and surface weft yarns, and the hydrophilicity of the surface weft yarns is better than that of the surface warp yarns; the hydrophobic inner layer is several rushes evenly distributed along the weft direction; the rushes are fixed to the surface warp yarns of the hydrophilic outer layer through an interlacing double-layer fabric structure to realize the fixation of the hydrophobic inner layer and the hydrophilic outer layer.

[0008] As a further improvement of the present invention, the interlacing double-layer fabric structure is a double-layer fabric with surface warp interlacing method. The weaving process of the interlacing double-layer fabric structure is as follows: the tissue repeat is 8 roots. When weaving the first weft, the warp yarns on the upper layer of the fell of the cloth are opened, and a rush is first inserted. After beating up, the upper and lower warp yarns are interlaced, and the lower warp yarns float on the lower surface, and the surface weft yarns are inserted; beating up again, the upper warp yarns float on the upper surface, and an empty weft is beaten; beating up again, the lower warp yarns emerge, and the surface weft yarns are put in, so that the ratio of the inner weft to the outer weft is 1:2. The weft insertion process of the latter four beating-up processes is carried out in the same way, and the subsequent weaving process repeats the above tissue repeat.

[0009] As a further improvement of the present invention, the weft density of the hydrophobic inner layer is 3-5 roots / cm, and the warp density is 7-9 roots / cm.

[0010] As a further improvement of the present invention, the weft density of the hydrophilic outer layer is 8-12 roots / cm, and the warp density is 7-9 roots / cm.

[0011] As a further improvement of the present invention, the hydrophilic outer layer is a 2 / 2 right twill structure woven by surface warp yarns and surface weft yarns; the hydrophobic inner layer is a 1 / 3 right twill structure woven by the surface warp yarns of the hydrophilic outer layer and rushes.

[0012] As a further improvement of the present invention, in the hydrophilic outer layer, the linear density of the surface warp yarns is 30-50S / 2, and the linear density of the surface weft yarns is 90-100S / 2.

[0013] As a further improvement of the present invention, the water content of the hydrophobic inner layer is 20-40%; the water content of the hydrophilic outer layer is 110-130%.

[0014] As a further improvement of the present invention, the surface warp yarn is cotton warp yarn, and the surface weft yarn is Tencel weft yarn.

[0015] The present invention also provides a method for preparing a sterilizing, breathable, self-absorbing liquid and anti-adhesion dressing, comprising the following steps:

[0016] S1. The warp yarn is threaded and reeded for weaving preparation, and the warp yarn is threaded and adjusted to the appropriate tension before the weaving process;

[0017] S2. First use plain weave to weave a preset length of 1-2cm;

[0018] S3. Weaving is performed according to the double-layer structure of the binding, and the weaving cycle is 8. When weaving the first weft of the rush dressing, the upper warp yarn of the weft opening is opened, and a rush is first inserted. After beating the weft, the upper and lower warp yarns are interlaced, and the lower warp yarn floats on the lower surface and the surface weft yarn is inserted; the weft is beaten again, and the upper warp yarn floats on the upper surface and the empty weft is beaten; the lower warp yarn is floated again, and the surface weft yarn is inserted, so that the ratio of the inner weft to the outer weft is 1:2. The weft insertion process of the next four beating processes is analogous. In the subsequent weaving process, the above weaving cycle is repeated.

[0019] The beneficial effects of the present invention are:

[0020] (1) The present invention provides a sterilizing, breathable, self-absorbent, and anti-adhesive dressing, comprising a hydrophobic inner layer and a hydrophilic outer layer; the hydrophilic outer layer is woven from a hydrophilic outer layer warp yarn and an outer layer weft yarn; the hydrophobic inner layer is a plurality of rushes uniformly distributed along the weft direction; the rushes and the warp yarns of the hydrophilic outer layer are fixed by a specific double-layer tissue weaving structure. The present invention fixes the rushes firmly on the hydrophilic outer layer through a specific double-layer structure, thereby obtaining a dressing with a specific structure. During use, on the one hand, the warp yarns in the hydrophobic inner layer contact the moisture at the wound site, and transfer the moisture to the hydrophilic outer layer with stronger water absorption through a transmission effect; on the other hand, with the help of the special hollow porous structure of the rushes and the hydrophilic and hydrophobic setting structure, the hydrophilic outer layer can absorb the moisture at the wound site in a strong unidirectional manner through the porous structure of the rushes and the special weaving structure of the rushes, so that the tissue fluid at the wound site is quickly discharged, and an environment suitable for wound healing is maintained. In addition, rush has excellent antibacterial properties and biocompatibility, which can quickly reduce inflammation while avoiding bacterial infection in the wound.

[0021] (2) By setting the hydrophilic and hydrophobic structures, the hydrophilic layer of the present invention is woven with cotton yarn and tencel with excellent hydrophilicity, and the hydrophobic layer is made of porous rush. Through the mutual cooperation of different layer structures and raw materials, the dressing has good air permeability, keeps the inner hydrophobic layer relatively dry, provides a suitable humidity environment for wound healing, and solves the problem of tissue fluid retention in the patient's wound of traditional wound repair dressings.

[0022] (3) The dressing with bactericidal, breathable, self-absorbing liquid, and anti-adhesion functions provided by the present invention is reasonably designed, has a simple structure, is beneficial to the absorption of wound moisture, promotes wound healing, has a good anti-inflammatory effect, and can be widely used as an anti-inflammatory and dressing material for surgical incisions, burns, scalds and other traumas, as well as for the repair of wound surfaces. This dressing does not need to add any chemical cross-linking agents, initiators, medical adhesives and other strengthening layers, and achieves excellent strength and toughness through a specific weaving structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 FIG. is a schematic structural diagram of the dressing with bactericidal, breathable, self-absorbing liquid, and anti-adhesion functions of the present invention.

[0024] Figure 2 FIG. is a water content diagram of different layers with unidirectional moisture conduction performance of the present invention.

[0025] Figure 3 FIG. is a water vapor transmission rate diagram of the dressing with bactericidal, breathable, self-absorbing liquid, and anti-adhesion functions prepared in Example 1 of the present invention.

[0026] Figure 4 FIG. is an antibacterial effect diagram of the dressing with bactericidal, breathable, self-absorbing liquid, and anti-adhesion functions prepared in Example 1 of the present invention.

[0027] Figure 5 FIG. is another form of antibacterial effect diagram of the dressing with bactericidal, breathable, self-absorbing liquid, and anti-adhesion functions prepared in Example 1 of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the drawings and specific embodiments.

[0029] Here, it should also be noted that in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the solution of the present invention are shown in the drawings, and other details less related to the present invention are omitted.

[0030] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0031] See also Figure 1 As shown, the present invention provides a sterilization, breathable, self-absorbent and anti-adhesion dressing, including a hydrophobic inner layer (close to the wound surface) and a hydrophilic surface layer; the hydrophilic surface layer is woven by hydrophilic surface warp yarns and surface weft yarns, and the hydrophilicity of the surface weft yarns is better than that of the surface warp yarns; the hydrophobic inner layer is a plurality of rushes uniformly distributed along the weft direction; the rushes and the warp yarns of the hydrophilic surface layer are fixed by a double-layer tissue weaving structure, and in this way, by fixing the double-layer tissue structure, while fewer yarns are arranged on the surface of the rushes, the rushes are firmly fixed on the hydrophobic layer to prevent them from loosening or falling off; at the same time, the rushes are fully and directly in contact with the wound surface. During use, on the one hand, the cotton yarn in the hydrophobic inner layer contacts the moisture at the wound site and transfers the moisture to the more absorbent hydrophilic surface layer through the transmission effect; on the other hand, with the help of the special hollow porous structure and hydrophilic and hydrophobic setting structure of rush, the highly hydrophilic surface layer can absorb the moisture at the wound site through the porous structure of rush and the special weaving structure of rush, so that the tissue fluid at the wound site is quickly discharged and the environment suitable for wound healing is maintained. In addition, rush has good antibacterial and biocompatibility, which can quickly reduce inflammation while avoiding bacterial infection at the wound site.

[0032] The double-layer structure is specifically a double-layer structure with surface warp binding (upper to lower). The weaving process of the double-layer structure is as follows: the weaving cycle is 8. When weaving the first weft of rush dressing, the upper warp yarn of the weft opening is opened, and a rush is first inserted. After beating the weft, the upper and lower warp yarns are interlaced (the upper layer is the inner layer, and the lower layer is the outer layer), and the lower warp yarn floats on the lower surface and is inserted into the outer weft yarn; the upper warp yarn floats on the upper surface and is punched into an empty weft (i.e., no rush is inserted); the lower warp yarn emerges and is inserted into the outer weft yarn, i.e., the ratio of the inner weft to the outer weft is 1:2. The weft insertion process of the last four beating processes is analogous. In the subsequent weaving process, the above weaving cycle is repeated.

[0033] The hydrophilic surface layer has a 2 / 2 right twill structure formed by the interweaving of surface warp yarns and surface weft yarns. Both the surface warp yarns and the surface weft yarns have excellent hydrophilicity, can quickly and maximally absorb the moisture at the wound site to keep the hydrophobic inner layer relatively dry, and provide a suitable humidity environment for wound healing. Among them, the linear density of the surface warp yarns is 30 - 50 S / 2, preferably 40 S / 2; the linear density of the surface weft yarns is 90 - 100 S / 2, preferably 80 S / 2. The fineness of both the surface warp yarns and the surface weft yarns is relatively fine, making the woven hydrophilic surface layer structure compact and firm. The weft density of the hydrophilic surface layer is 8 - 12 threads / cm, preferably 10 threads / cm; the warp density is 7 - 9 threads / cm, preferably 8 threads / cm.

[0034] The hydrophobic inner layer has a 1 / 3 right twill structure formed by the interweaving of surface warp yarns and rush. The weft density of the hydrophobic inner layer is 3 - 5 threads / cm; preferably 4 threads / cm, and the warp density is 7 - 9 threads / cm, preferably 8 threads / cm. The length of the hydrophobic inner layer (i.e., the dressing) can be set to different specifications according to actual needs, so that the dressing can better fit wounds of various shapes and has a wider application scenario. In some embodiments, the diameter of the rush is 1.5 - 2 mm; the width of the hydrophobic inner layer (i.e., the dressing) is 4 - 6 cm. In addition, the hydrophobic inner layer will not adhere to the wound surface, avoiding secondary trauma to the wound. The rush itself has antibacterial effects, and there is no need to add additional antibacterial drugs, solving the problem that antibacterial drugs loaded on other dressings are prone to fall off.

[0035] The water content of the hydrophobic inner layer is 20 - 40%; the water content of the hydrophilic surface layer is 110 - 130%. The water content of the hydrophobic inner layer and the hydrophilic surface layer was tested respectively, and the results are as Figure 2 shown. It can be seen from Figure 2 this that the water content of the hydrophobic inner layer is 30%; the water content of the hydrophilic surface layer is 120%. The water content gradient difference between the two is relatively large, thus promoting the autonomous transfer of liquid from the hydrophobic inner layer to the hydrophilic surface layer.

[0036] The present invention also provides a preparation method of a dressing with bactericidal, breathable, self-absorbing liquid, and anti-adhesion functions, including the following steps:

[0037] S1. Perform the weaving preparation processes of threading the warp yarns through the harnesses and reeds, and after adjusting the tension of the threaded warp yarns appropriately, carry out the weaving process;

[0038] S2. Call the pre-set plain weave draft and weave a preset length of 1 - 2 cm using the plain weave;

[0039] S3. Call the dobby double-layer fabric structure draft for weaving. Its weave repeat is 8 warp threads. When starting to weave the first weft of the rush dressing, the warp threads on the upper layer of the fell of the cloth are lifted, and a rush is first inserted. After beating-up, the upper and lower warp threads interlace, and the lower warp threads float on the lower surface, and the surface weft is inserted. After beating-up again, the upper warp threads float on the upper surface, and an empty weft (i.e., no rush is placed) is beaten. After beating-up again, the lower warp threads emerge, and the surface weft is inserted. That is, the ratio of the inner weft to the surface weft is 1:2. The weft insertion process in the subsequent four beating-up processes is carried out in the same way. In the subsequent weaving process, the above weave repeat is repeated.

[0040] Apply this dressing with bactericidal, breathable, self-absorbent liquid, and anti-adhesion properties to the field of wound repair. For example, it is widely used as an anti-inflammatory and dressing material for surgical incisions, burns, scalds and other traumatic injuries.

[0041] The present invention will be described in detail below through specific embodiments.

[0042] Embodiment 1

[0043] A preparation method of a dressing with bactericidal, breathable, self-absorbent liquid, and anti-adhesion properties. The surface warp threads are cotton warp threads, and the surface weft threads are tencel weft threads; it includes the following steps:

[0044] S1. Carry out the weaving preparation processes of drawing-in and denting for the cotton warp threads. After adjusting the appropriate tension of the drawn-in cotton warp threads, carry out the weaving process. Specifically:

[0045] S11. Obtain about 120 cotton yarns with a length of 2 m on the creel as warp threads and tie them to the warp beam.

[0046] S12. On the small sample loom, bypass the back beam and warp stop motions and carry out drawing-in according to the front-back zoning method, using a total of 8 harnesses.

[0047] S13. Insert the cotton warp threads that have passed through drawing-in into the reed with a density of 2 ends per dent of a reed with φ = 60.

[0048] S14. Comb the cotton warp threads passing through the reed neatly to ensure that there is no buckling and entanglement between the yarns.

[0049] S15. Bypass the front beam with the combed cotton warp threads and firmly tie them to the cloth roller.

[0050] S2. Before officially starting to weave the dobby double-layer fabric structure, first call the draft pattern of the plain weave structure set in advance, and use the cotton warp threads and tencel weft threads to beat-up and weave about 1-2 cm, which plays a role in separating the fabrics and at the same time plays a role in strengthening the fabrics.

[0051] S3. Call the draft pattern of the dobby double-layer fabric structure and start the beating-up motion. First, insert the filling carrier to ensure a small shrinkage rate and good flatness of the fabric, and then insert the filling yarn to further weave the fabric flat. Specifically:

[0052] The weaving cycle is 8. When weaving the first weft of rush dressing, the upper warp yarn of the weft opening is opened, and a rush is first inserted. After beating the weft, the upper and lower warp yarns are interlaced, and the lower warp yarn floats on the lower surface and is inserted with tencel; beating the weft again, the upper warp yarn floats on the upper surface, and an empty weft is beaten (i.e., no rush is placed); beating the weft again, the lower warp yarn emerges, and tencel is placed, i.e., the ratio of the inner weft to the outer weft is 1:2, and the weft insertion process of the next four beating processes is analogous. The subsequent weaving process repeats the above weaving cycle.

[0053] The sterilization, breathable, self-absorbent and anti-adhesion dressing prepared in Example 1 was tested for air permeability. The air permeability test method is as follows:

[0054] (1) Use a measuring cylinder to accurately measure 34 mL of distilled water at the same temperature as the test conditions, and inject it into a clean and dry permeable cup. Place the test surface (i.e., the rush surface) of the sample on the permeable cup with the test surface facing downward, so that the water is about 10 mm away from the rush surface. Install the gasket and the pressure ring, screw on the nut, and then use vinyl adhesive tape to seal the pressure ring, gasket and permeable cup from the side to form a test assembly. This step should be completed as quickly as possible.

[0055] (2) Rapidly place the test assembly horizontally in a test chamber that has reached the specified test conditions. After 1 hour of equilibrium, weigh each test assembly in the chamber according to its number, accurate to 0.001g, to obtain the initial weight. If weighing is performed outside the chamber, the weighing time for each test assembly shall not exceed 15s.

[0056] (3) Continue to place it in the test chamber for 1 hour, and weigh it again in the same order as specified in (2) to obtain the final weight. The amount of water evaporated is obtained by the initial weight and the final weight. The test assembly should be kept horizontal throughout the test to prevent the water in the cup from getting on the surface of the specimen.

[0057] The air permeability test results are as follows: Figure 3 As shown, the rush is the dressing prepared in Example 1, the gauze is commercially available medical cotton gauze, and the dressing is commercially available gelatin hemostatic sponge. Figure 3 It can be seen that the water vapor permeability of the dressing prepared in Example 1 maintained a linear increase within 60 hours and reached 0.16 g / cm 2 , while the air permeability of commercially available medical cotton gauze and gelatin hemostatic sponge is significantly poor, which further illustrates that the dressing prepared in Example 1 can make the wound surface relatively dry.

[0058] The antibacterial performance of the dressing prepared in Example 1 was tested, and the results were as follows: Figure 4 and Figure 5 shown. Figure 4 In the embodiment, the rush is the dressing prepared in Example 1, the gauze is a commercially available medical cotton gauze, and the gelatin sponge is a commercially available gelatin hemostatic sponge.Figure 4 It can be seen that the antibacterial performance of the dressing prepared in Example 1 is significantly better. Figure 5 In the control group, the hydrophilic surface layer was used, and the dressing prepared in Example 1 was the rush. Figure 5 It can be seen that the dressing prepared in Example 1 has good antibacterial performance.

[0059] Comparative Example 1

[0060] A preparation method of a dressing with bactericidal, breathable, self-absorbing liquid, and anti-adhesion properties. Compared with Example 1, the difference is that the rush layer is replaced with a cotton core treated with hydrophobic treatment of the same thickness, and the others are substantially the same as those in Example 1, which will not be elaborated here.

[0061] Comparative Example 2

[0062] A preparation method of a dressing with bactericidal, breathable, self-absorbing liquid, and anti-adhesion properties includes the following steps:

[0063] S1. Perform the weaving preparation processes of threading the cotton warp yarns and reed, and after adjusting the appropriate tension of the threaded cotton warp yarns, perform the weaving process. Specifically:

[0064] S11. Obtain about 120 cotton yarns with a length of 2 m on the yarn winder as warp yarns and tie them to the warp beam;

[0065] S12. On the small weaving prototype, thread the warp yarns through the back beam and warp stop motions according to the front-back zoning method, and a total of 4 harness frames are used;

[0066] S13. Thread the yarns that have passed through the threading process into a reed with a density of 2 ends per dent of φ = 60;

[0067] S14. Pass the combed yarns around the front beam and firmly tie them to the cloth take-up roller.

[0068] S2. Call the pattern map of the plain weave, start the beating-up motion, first place the padding ruler to ensure a small shrinkage rate and flatness of the fabric, and then place the padding yarn to further weave the fabric flat. Specifically:

[0069] Only rush is padded as the weft yarn for the surface weft, and tencel is padded as the weft yarn for the inner weft. The ratio of the inner weft to the surface weft is still 1:2, and a double-layer dressing structure is obtained.

[0070] Comparative Example 3

[0071] A preparation method of a dressing with bactericidal, breathable, self-absorbing liquid, and anti-adhesion properties includes the following steps:

[0072] S1. Perform the weaving preparation processes of threading the cotton warp yarns and reed, and after adjusting the appropriate tension of the threaded cotton warp yarns, perform the weaving process. Specifically:

[0073] S11. Obtain about 120 cotton yarns with a length of 2 m on the winding device as warp yarns, and tie them to the weaving beam;

[0074] S12. On the small sample loom, thread the warp yarns through the heddles and stop motions according to the regular threading method, and a total of 2 heddle frames are used;

[0075] S13. Thread the cotton warp yarns that have been threaded through the heddles into the reed with a density of 2 ends per dent of a reed with φ = 60;

[0076] S14. Pass the carded cotton warp yarns around the front beam and firmly tie them to the cloth roller.

[0077] S2. Call the pattern drawing of the plain weave, start the beating-up motion. First, place the spacer bar to ensure a small shrinkage rate and flatness of the fabric, and then place the laying-in yarn to further weave the fabric flat. Specifically:

[0078] Only rush is padded as the weft yarn on the front side of the fabric, and tencel is padded as the weft yarn on the back side. The ratio of the inner weft to the outer weft is still 1:2, obtaining a plain weave dressing structure.

[0079] Perform performance tests on the dressings prepared in Example 1 and Comparative Examples 1-3, and the results are shown in Table 1:

[0080] Perform performance tests on the dressings prepared in Example 1 and Comparative Examples 1-3, and the results are shown in Table 1:

[0081] The air permeability refers to the air permeability in 60 h.

[0082] Table 1 Performance tests on the dressings prepared in Example 1 and Comparative Examples 1-3

[0083]

[0084]

[0085] From the data of Example 1 and Comparative Example 1 in Table 1, it can be seen that the dressing in Example 1 has a better effect and is more conducive to the repair of the wound surface. The reason is that: the cotton core does not have the porous structure of rush, and its air permeability is poor; at the same time, the cotton yarn does not have antibacterial and anti-inflammatory properties.

[0086] From the data of Comparative Examples 2-3 and Example 1, it can be seen that the dressing woven with the interlaced double-layer structure has a better effect. The reason is that: the ordinary double-layer fabric is a fabric structure that exists independently up and down, with more intersections of the tissue points, and the exposed area of rush is less than that of the interlaced structure; in the plain weave, the warp and weft yarns are interwoven every other one, and the warp and weft yarns are interwoven most frequently, with the most warp yarn buckling times. Therefore, the exposed area of rush is the least, and there are more breaks in the rush, resulting in the worst effect.

[0087] In summary, the present invention provides a dressing with bactericidal, breathable, self-absorbing liquid, and anti-adhesion properties and its preparation method. The dressing includes a hydrophobic inner layer and a hydrophilic outer layer; the hydrophilic outer layer is woven from hydrophilic surface warp yarns and surface weft yarns, and the hydrophilicity of the surface weft yarns is better than that of the surface warp yarns; the hydrophobic inner layer is several rushes evenly distributed along the weft direction; the rushes are fixed to the warp yarns of the hydrophilic outer layer through a specific interlaced double-weave structure. Through the specific interlaced structure, the rushes are firmly fixed on the hydrophilic outer layer to obtain a high-performance dressing with a specific structure; the dressing with bactericidal, breathable, self-absorbing liquid, and anti-adhesion properties is applied to the field of wound repair. For example, it is widely used as an anti-inflammatory and dressing material for surgical incisions, burns, scalds and other traumatic injuries.

[0088] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A bactericidal, breathable, self-absorbent and anti-adhesive dressing, characterized in that, It comprises a hydrophobic inner layer and a hydrophilic outer layer; the hydrophilic outer layer is woven by hydrophilic outer warp yarns and outer weft yarns, the hydrophilicity of the outer weft yarns is better than that of the outer warp yarns; the hydrophobic inner layer is a plurality of rushes evenly distributed along the weft direction; the rushes and the outer warp yarns of the hydrophilic outer layer are fixed by a double-layer structure, so as to fix the hydrophobic inner layer and the hydrophilic outer layer.

2. The bactericidal, breathable, self-absorbent and anti-adhesive dressing according to claim 1, characterized in that, The double-layer stitching structure is a double-layer stitching structure of the surface warp stitching method. The weaving process of the double-layer stitching structure is as follows: the stitching cycle is 8, when weaving the first weft, the upper warp yarn of the weft opening is opened, and a rush is first inserted, and after beating the weft, the upper and lower warp yarns are interlaced, the lower warp yarn floats on the lower surface, and the surface weft yarn is inserted; the weft is beaten again, the upper warp yarn floats on the upper surface, and the empty weft is beaten; Beat the weft again, the lower warp yarn emerges, and the surface weft yarn is put in, so that the ratio of the inner weft to the surface weft is 1:

2. The weft yarn padding process of the next four beating-up processes is similar, and the subsequent weaving process repeats the above organization cycle.

3. The bactericidal, breathable, self-absorbent and anti-adhesive dressing according to claim 1, characterized in that, The weft density of the hydrophobic inner layer is 3-5 strands / cm, and the warp density is 7-9 strands / cm.

4. The bactericidal, breathable, self-absorbent and anti-adhesive dressing according to claim 1, characterized in that, The weft density of the hydrophilic surface layer is 8-12 strands / cm, and the warp density is 7-9 strands / cm.

5. The bactericidal, breathable, self-absorbent and anti-adhesive dressing according to claim 1, characterized in that The hydrophilic surface layer is a 2 / 2 right twill structure in which the surface warp yarns and the surface weft yarns are interwoven; the hydrophobic inner layer is a 1 / 3 right twill structure in which the surface warp yarns of the hydrophilic surface layer are interwoven with rushes.

6. The bactericidal, breathable, self-absorbent, and anti-adhesive dressing according to claim 5, characterized in that, In the hydrophilic surface layer, the linear density of the surface warp yarn is 30-50S / 2, and the linear density of the surface weft yarn is 90-100S / 2.

7. The bactericidal, breathable, self-absorbent and anti-adhesive dressing according to claim 1, characterized in that, The water content of the hydrophobic inner layer is 20-40%; the water content of the hydrophilic surface layer is 110-130%.

8. The bactericidal, breathable, self-absorbent and anti-adhesive dressing according to claim 1, wherein The surface warp yarn is cotton warp yarn, and the surface weft yarn is tencel.

9. A preparation method of the bactericidal, breathable, self-absorbent and anti-adhesive dressing according to any one of claims 1 to 8, characterized in that, The steps include: S1. The warp yarn is threaded and reeded for weaving preparation, and the warp yarn is threaded and adjusted to the appropriate tension before the weaving process; S2. First use plain weave to weave a preset length of 1-2cm; S3. According to the double-layer structure of the binding, the weft is woven with 8 loops. When weaving the first weft, the upper warp yarn of the weft is opened, and a rush is first inserted. After beating, the upper and lower warp yarns are interlaced, and the lower warp yarn floats on the lower surface and the surface weft yarn is inserted; the weft is beaten again, and the upper warp yarn floats on the upper surface, and the empty weft is beaten; Beat the weft again, the lower warp yarn emerges, and the surface weft yarn is put in, so that the ratio of the inner weft to the surface weft is 1:

2. The weft yarn padding process of the next four beating-up processes is similar, and the above organization is repeated in the subsequent weaving process.

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