Bacteriostatic hemostatic imbibition type dressing

Abstract

The utility model discloses a bacteriostatic hemostatic imbibition type dressing which comprises a polypropylene melt-blown non-woven material layer, a viscose fiber net layer, a carboxymethyl chitosan fiber / fine denier viscose fiber net layer and a quaternary ammonium salt chitosan fiber net layer which are distributed from bottom to top, the carboxymethyl chitosan fiber / fine denier viscose fiber net layer is in composite connection with the viscose fiber net layer and the quaternary ammonium salt chitosan fiber net layer through a front and back needling process, and the polypropylene melt-blown non-woven material layer is adhered to the surface of the viscose fiber net layer in a melt-blown manner. The wound dressing has good moisture permeability, air permeability, bacteriostasis, hemostasis and liquid absorption performance, wound infection can be prevented, dressing adhesion is prevented, and wound healing is promoted.

Description

Technical Field

[0001] The utility model relates to the technical field of dressings, in particular to an antibacterial, hemostatic, and liquid-absorbing dressing. Background Art

[0002] The traditional dressings currently used are mainly medical absorbent cotton gauze, cotton pads and vaseline gauze, which have the functions of simple protection and infection prevention. However, traditional dressings cannot keep the wound moist, which is not conducive to wound healing. Moreover, the dressings are easy to adhere to the wound, resulting in secondary damage to the skin when removing the dressings, which increases the pain of the patient. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and provide an antibacterial hemostatic liquid-absorbing dressing, which has good moisture permeability, air permeability, antibacterial hemostasis and liquid absorption properties, can prevent wound infection, prevent dressing adhesion, and promote wound healing.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The invention discloses an antibacterial hemostatic liquid-absorbing dressing, comprising a polypropylene melt-blown nonwoven material layer, a viscose fiber mesh layer, a carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer, and a quaternary ammonium salt chitosan fiber mesh layer distributed from bottom to top, wherein the carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer is compositely connected with the viscose fiber mesh layer and the quaternary ammonium salt chitosan fiber mesh layer by a front and back needle-punching process, and the polypropylene melt-blown nonwoven material layer is bonded to the surface of the viscose fiber mesh layer by a melt-blowing method.

[0006] The quaternary ammonium salt chitosan fiber mesh layer is a fiber mesh structure made of chitosan fiber mesh after pre-needling and quaternary ammonium salt treatment, and the fiber mesh pore size distribution is between 90-150 μm.

[0007] The chitosan fiber net is a fiber net structure prepared by a loosening and carding process of chitosan fibers; the chitosan fibers have a fineness of 1.7 dtex and a length of 38 mm.

[0008] The carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer is a fiber mesh structure prepared by mixing carboxymethyl chitosan fiber and fine denier viscose fiber through a loosening and carding process, and the pore size distribution of the fiber mesh is between 50-100 μm.

[0009] The mass ratio of the carboxymethyl chitosan fiber to the fine-denier viscose fiber in the carboxymethyl chitosan fiber / fine-denier viscose fiber mesh layer is 0.25-4.

[0010] The carboxymethyl chitosan fiber has a fineness of 1.3 dtex and a length of 38 mm; the fineness of the fine denier viscose fiber has a fineness of 1.1 dtex and a length of 38 mm.

[0011] The viscose fiber mesh layer is a fiber mesh structure prepared by viscose fibers through an opening and carding process; the pore size distribution of the fiber mesh is between 100-160 μm; the fineness of the viscose fibers is 1.7 dtex, and the length is 40 mm.

[0012] The polypropylene meltblown nonwoven material layer is a fiber mesh structure formed by spraying a polypropylene fiber mesh on the surface of a viscose fiber mesh layer through a meltblowing process, and the fiber mesh pore size is evenly distributed in the range of 3-30 μm; the polypropylene fiber has a diameter of 2-5 μm and a length of 40-70 mm.

[0013] The thickness of the antibacterial hemostatic absorbent dressing is 0.90-1.00 mm.

[0014] The weight of antibacterial hemostatic absorbent dressing is 150-220g / m 2 ; The weight of the carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer is 50-90g / m 2 ; The weight of the quaternary ammonium salt chitosan fiber mesh layer is 30-55g / m 2 The total weight of the quaternary ammonium salt chitosan fiber mesh layer, the carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer, and the viscose fiber mesh layer is 130-190g / m 2 .

[0015] The beneficial effects of the utility model are:

[0016] The quaternary ammonium salt chitosan fiber mesh layer is used as the contact layer to create a moist environment for the wound, so that the dressing has good antibacterial and hemostatic and wound healing functions, and effectively prevents infection of the wound surface; the carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer is used as the tissue exudate absorption layer, which is used to absorb tissue exudate to form hydrogel, thereby providing a moist environment for the wound, preventing the dressing from sticking and promoting wound healing; the viscose fiber mesh layer, the quaternary ammonium salt chitosan fiber mesh layer, and the carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer form a structure in which the middle fiber is fine and the pores are small, and the upper and lower layers of fiber are coarse and the pores are large, so that the viscose fiber mesh layer serves as a barrier layer for the hydrogel, thereby enhancing the absorption of tissue exudate; the polypropylene melt-blown non-woven material layer is used as the anti-seepage and anti-leakage layer, so that the dressing has good moisture permeability and breathability. The utility model can give full play to the effect of each layer of material through multi-layer structure composite, so that the dressing has good antibacterial hemostasis and liquid absorption performance and reduces the material preparation cost. At the same time, it has the characteristic of being able to adjust the dressing's tissue exudate absorption performance by adjusting the ratio of raw materials in the carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model.

[0018] In the figure: quaternary ammonium salt chitosan fiber web layer 1, carboxymethyl chitosan fiber / fine denier viscose fiber web layer 2, viscose fiber web layer 3, polypropylene melt-blown nonwoven material layer 4. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0020] like Figure 1 As shown, an antibacterial hemostatic liquid-absorbing dressing includes a polypropylene melt-blown nonwoven material layer 4, a viscose fiber mesh layer 3, a carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer 2, and a quaternary ammonium chitosan fiber mesh layer 1 distributed from bottom to top, the carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer 2 is compositely connected with the viscose fiber mesh layer 3 and the quaternary ammonium chitosan fiber mesh layer 1 by a front and back needle-punching process, and the polypropylene melt-blown nonwoven material layer 4 is bonded to the surface of the viscose fiber mesh layer 3 by melt-blowing.

[0021] The thickness of the antibacterial hemostatic absorbent dressing is 0.90-1.00mm. The weight of the antibacterial hemostatic absorbent dressing is 150-220g / m 2 ; The weight of carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer 2 is 50-90g / m 2 The weight of the quaternary ammonium salt chitosan fiber mesh layer 1 is 30-55g / m 2 The total weight of the quaternary ammonium salt chitosan fiber mesh layer 1, the carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer 2, and the viscose fiber mesh layer 3 is 130-190g / m 2 .

[0022] The quaternary ammonium salt chitosan fiber mesh layer 1 is a fiber mesh structure made of chitosan fiber mesh after pre-acupuncture and quaternary ammonium salt treatment (i.e., chitosan fiber is first formed into a fiber mesh by opening and combing, and then reinforced by pre-acupuncture, and then quaternized, and the quaternization method is: using an active quaternary ammonium salt modification method, the halogen active group in the active quaternary ammonium salt and the amino group in the chitosan molecular chain undergo a substitution reaction, and the quaternary ammonium salt group is introduced into chitosan), and its fiber mesh pore size distribution is between 90-150 μm. The chitosan fiber mesh is a mesh structure prepared by the opening and combing process of chitosan fiber; the fineness of the chitosan fiber is 1.7 dtex and the length is 38 mm. The chitosan fiber itself has certain antibacterial properties in the quaternary ammonium salt chitosan fiber mesh layer 1, and the introduction of quaternary ammonium salt groups can greatly enhance the antibacterial properties of chitosan fiber, which can be used as a contact layer of a dressing to create a moist environment, inhibit bacteriostasis and promote wound healing, and effectively prevent infection of the wound surface.

[0023] The carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer 2 is a fiber mesh structure prepared by mixing carboxymethyl chitosan fiber and fine denier viscose fiber and then opening and combing the fiber mesh, and the fiber mesh pore size distribution is between 50-100 μm. The mass ratio of carboxymethyl chitosan fiber to fine denier viscose fiber in the carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer 2 is 0.25-4, usually selected as 20:80, 40:60, 60:40, 80:20. The fineness of the carboxymethyl chitosan fiber is 1.3 dtex and the length is 38 mm; the fineness of the fine denier viscose fiber is 1.1 dtex and the length is 38 mm. The carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer 2 serves as a tissue exudate absorption layer, which can absorb tissue exudate to form a hydrogel, provide a moist environment for the wound, effectively prevent the dressing from sticking, and promote wound healing; the fiber mesh formed by the fine denier fibers serves as a support frame, which is beneficial to the absorption of tissue exudate, accelerates the proliferation of new microvessels, and accelerates wound healing.

[0024] The viscose fiber mesh layer 3 is a fiber mesh structure made of viscose fibers through an opening and combing process; the pore size distribution of the fiber mesh is between 100-160 μm; the fineness of the viscose fiber is 1.7 dtex, and the length is 40 mm. The viscose fiber mesh layer 3, the quaternary ammonium salt chitosan fiber mesh layer 1, and the carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer 2 form a structure in which the middle fiber is fine and the pores are small, and the upper and lower layers of fiber are coarse and the pores are large, which is conducive to the absorption of tissue exudate and can also serve as a barrier layer for hydrogel; at the same time, the viscose fiber mesh layer 3 also has a certain liquid absorption performance, which is conducive to the adsorption of tissue exudate.

[0025] The polypropylene melt-blown nonwoven material layer 4 is a fiber mesh structure formed by spraying polypropylene fibers on the surface of the viscose fiber mesh layer 3 through a melt-blown process; the average pore size of the fiber mesh is 3-30 μm; the diameter of the polypropylene fiber is 2-5 μm, and the length is 40-70 mm. The polypropylene is directly melt-blown on the needle-punched composite material and can be directly bonded to the viscose fiber mesh layer 3; the polypropylene melt-blown nonwoven material layer 4 serves as an anti-seepage and anti-leakage layer of the dressing and has good hydrostatic pressure and air and moisture permeability.

[0026] The preparation of the dressing of the utility model firstly comprises the following steps: firstly, a chitosan fiber net, a carboxymethyl chitosan fiber / fine denier viscose fiber net layer 2, and a viscose fiber net layer 3 are prepared respectively by means of an opening and combing process; then, the chitosan fiber net is pre-needled and quaternized to form a quaternary ammonium salt chitosan fiber net layer 1; then, the three are laminated and compounded, and reinforced by means of a front and back needle-punching process; and then, polypropylene fibers are melt-blown on the surface of the viscose fiber net layer 3 to form a polypropylene melt-blown nonwoven material layer 4. The initial thicknesses of the quaternary ammonium salt chitosan fiber mesh layer 1, the carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer 2, and the viscose fiber mesh layer 3 are 0.35-0.55 mm, 0.50-0.70 mm, and 0.40-0.60 mm, respectively. After being compounded by needle punching, the thickness of the three becomes thinner. The melt-blown thickness of the polypropylene melt-blown nonwoven material layer 4 is controlled to be 0.10-0.16 mm. Finally, the thickness of the finished dressing is controlled to be 0.90-1.00 mm.

[0027] The utility model can bring into play the effect of each layer of material through multi-layer structure composite, so that the dressing has good antibacterial hemostasis and liquid absorption performance while reducing the material preparation cost. At the same time, the mixing of different proportions of raw materials of the middle carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer 2 makes the dressing have the characteristic of adjustable dressing absorption of tissue exudate.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An antibacterial hemostatic liquid-absorbing dressing, characterized in that: The invention comprises a polypropylene meltblown nonwoven material layer (4), a viscose fiber mesh layer (3), a carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer (2), and a quaternary ammonium salt chitosan fiber mesh layer (1) which are arranged from bottom to top, wherein the carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer (2) is compositely connected with the viscose fiber mesh layer (3) and the quaternary ammonium salt chitosan fiber mesh layer (1) by a front and back needle punching process, and the polypropylene meltblown nonwoven material layer (4) is bonded to the surface of the viscose fiber mesh layer (3) by a meltblowing method; The quaternary ammonium salt chitosan fiber mesh layer (1) is a fiber mesh structure made of chitosan fiber mesh after pre-needling and quaternary ammonium salt treatment; the chitosan fiber mesh is a mesh structure made of chitosan fibers through an opening and combing process; The carboxymethyl chitosan fiber / fine denier viscose fiber web layer (2) is a fiber web structure prepared by mixing carboxymethyl chitosan fibers and fine denier viscose fibers and then subjecting them to an opening and carding process; The viscose fiber web layer (3) is a fiber web structure prepared by a process of opening and carding viscose fibers.

2. The antibacterial hemostatic liquid-absorbing dressing according to claim 1, characterized in that: The pore size distribution of the quaternary ammonium salt chitosan fiber mesh layer (1) is between 90 and 150 μm.

3. The antibacterial hemostatic liquid-absorbing dressing according to claim 2, characterized in that: The chitosan fiber has a fineness of 1.7 dtex and a length of 38 mm.

4. The antibacterial hemostatic liquid-absorbing dressing according to claim 1, characterized in that: The fiber mesh pore size distribution of the carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer (2) is between 50 and 100 μm.

5. The antibacterial hemostatic liquid-absorbing dressing according to claim 4, characterized in that: The mass ratio of the carboxymethyl chitosan fibers to the fine-denier viscose fibers in the carboxymethyl chitosan fiber / fine-denier viscose fiber mesh layer (2) is 0.25-4.

6. The antibacterial hemostatic liquid-absorbing dressing according to claim 4, characterized in that: The carboxymethyl chitosan fiber has a fineness of 1.3 dtex and a length of 38 mm; the fineness of the fine denier viscose fiber has a fineness of 1.1 dtex and a length of 38 mm.

7. The antibacterial hemostatic liquid-absorbing dressing according to claim 1, characterized in that: The pore size of the viscose fiber mesh layer (3) is distributed between 100 and 160 μm; the viscose fiber fineness is 1.7 dtex, and the length is 40 mm.

8. The antibacterial hemostatic liquid-absorbing dressing according to claim 1, characterized in that: The polypropylene meltblown nonwoven material layer (4) is a fiber mesh structure formed by spraying polypropylene fibers onto the surface of the viscose fiber mesh layer (3) through a meltblowing process, and the average pore size of the fiber mesh is 3-30 μm; the diameter of the polypropylene fibers is 2-5 μm, and the length is 40-70 mm.

9. The antibacterial hemostatic liquid-absorbing dressing according to claim 1, characterized in that: The thickness of the antibacterial hemostatic absorbent dressing is 0.90-1.00 mm.

10. The antibacterial hemostatic liquid-absorbing dressing according to claim 1, characterized in that: The weight of antibacterial hemostatic absorbent dressing is 150-220 g / m 2 ; The weight of the carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer (2) is 50-90 g / m 2 ; The weight of the quaternary ammonium salt chitosan fiber mesh layer (1) is 30-55 g / m 2 The total weight of the quaternary ammonium salt chitosan fiber mesh layer (1), the carboxymethyl chitosan fiber / fine denier viscose fiber mesh layer (2), and the viscose fiber mesh layer (3) is 130-190 g / m 2 .

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