Bacteriostatic and deodorant bamboo fiber composite non-woven fabric

Abstract

The utility model discloses a kind of bacteriostatic deodorization bamboo fiber composite non-woven fabrics, belong to disposable sanitary product technical field.Composite non-woven fabric includes bamboo fiber layer I, bamboo charcoal fiber layer and bamboo fiber layer II which are sequentially laminated, wherein, bamboo fiber and bamboo charcoal fiber are intertwined;Rhombic mesh I is evenly distributed on bamboo fiber layer I, rhombic mesh II is evenly distributed on bamboo charcoal fiber layer, rhombic mesh III is evenly distributed on bamboo fiber layer II, the coincident part of rhombic mesh I, rhombic mesh II and rhombic mesh III three in vertical direction projection plane forms rhombic through-hole, and rhombic through-hole constitutes continuous rhombic channel in three-dimensional space.In which, through bamboo fiber layer, bamboo charcoal fiber layer and rhombic through-hole etc. cooperate and set, ensure that the bamboo fiber of outer layer provides bacteriostatic effect for composite spunlace fabric, middle layer bamboo charcoal fiber provides the function of adsorbing peculiar smell, so that the composite spunlace fabric concerned has the effect of large-area antibacterial and peculiar smell removal, to meet actual demand.

Description

Technical Field

[0001] This utility model specifically relates to an antibacterial and deodorizing bamboo fiber composite nonwoven fabric, belonging to the field of separation and purification experimental equipment. Background Technology

[0002] Spunlace nonwoven fabric, as an important nonwoven material, is widely used in hygiene, medical, beauty, and cleaning fields due to its softness, fluffiness, high moisture absorption, and low lint shedding properties. In its production process, high-pressure micro-jet water jets are used to spray and entangle the fiber web, making the fibers more tightly packed and ultimately forming a fabric that combines the feel of a woven garment with high strength. Currently, most spunlace nonwoven fabric products on the market feature a pearlescent surface (e.g., CN213792938U, CN213792938U). This texture is formed by specific web forming or hydroentangling processes, which enhances the fabric's friction and tactile comfort while improving its aesthetics.

[0003] In terms of applications, the dominant spunlace nonwoven fabric products are currently ordinary wiping cloths, which occupy a large market share. These products are mainly used for facial cleansing, makeup removal, and daily care. Due to their gentle texture and low skin irritation, they are highly favored by the personal care industry. However, although spunlace nonwoven fabrics have the potential for functional processing (such as adding antibacterial, antistatic, and superabsorbent properties through finishing techniques), most existing products still remain at the level of basic wiping uses, with limited functionality and significant homogenization.

[0004] Although the prior art CN207931200U discloses "an antibacterial polyester fabric", the deodorizing and antibacterial layer involved therein has a plain weave structure and a small deodorizing and antibacterial area, etc.

[0005] Therefore, a spunlace nonwoven fabric with a large deodorizing and antibacterial area, good effect, and simple structure is needed. Summary of the Invention

[0006] To address the problems of existing nonwoven fabrics having small deodorizing and antibacterial areas, poor effects, complex structures, and requiring complex post-processing to modify the fabric surface to enhance functionality, a novel antibacterial and deodorizing bamboo fiber composite nonwoven fabric is proposed. In this technical solution, the combination of bamboo fiber layers, bamboo charcoal fiber layers, and diamond-shaped through-holes ensures that the outer bamboo fiber layer provides antibacterial properties to the composite spunlace fabric, while the middle bamboo charcoal fiber layer absorbs odors. This ensures that the composite spunlace fabric has a large area of ​​antibacterial and deodorizing effects to meet practical needs.

[0007] To achieve the above technical objectives, the following technical solution is proposed: The purpose of this technical solution is to provide: an antibacterial and deodorizing bamboo fiber composite nonwoven fabric, comprising a bamboo fiber layer I, a bamboo charcoal fiber layer and a bamboo fiber layer II stacked sequentially, wherein the bamboo charcoal fiber layer is disposed between the bamboo fiber layer I and the bamboo fiber layer II, the bamboo fibers in the bamboo fiber layer I and the bamboo charcoal fibers in the bamboo charcoal fiber layer are intertwined, and the bamboo charcoal fibers in the bamboo charcoal fiber layer and the bamboo fibers in the bamboo fiber layer II are intertwined. Rhomboid mesh I is evenly distributed on bamboo fiber layer I, rhomboid mesh II is evenly distributed on bamboo charcoal fiber layer, and rhomboid mesh III is evenly distributed on bamboo fiber layer II. The overlapping part of rhomboid mesh I, rhomboid mesh II, and rhomboid mesh III in the vertical projection plane forms rhomboid through holes, which constitute continuous rhomboid channels in three-dimensional space; and the rhomboid through holes are distributed in an array on the composite nonwoven fabric. Composite nonwoven fabric: The diameter of the diamond-shaped through-holes is 20-60 mesh, and the number of diamond-shaped through-holes is 23-27 per cm. 2 The thickness is 0.33 to 0.63 mm.

[0008] As an option, the apertures of rhombus mesh I, rhombus mesh II, and rhombus mesh III are equal; The overlapping area between rhombus mesh I and rhombus mesh II accounts for 40-60% of the area per unit aperture; the overlapping area between rhombus mesh II and rhombus mesh III accounts for 40-60% of the area per unit aperture; and the overlapping area between rhombus mesh I and rhombus mesh III accounts for 10-40% of the area per unit aperture. Specifically, the area per unit aperture refers to the aperture area of ​​rhombus mesh I, rhombus mesh II, or rhombus mesh III. Bamboo fiber layer I: thickness is 0.033-0.189 mm, weight percentage is 10-30%; per square centimeter, there are 15-35 rhomboid mesh I on bamboo fiber layer I, the pore size of rhomboid mesh I is 20-60 mesh; in bamboo fiber layer I, the length of bamboo fiber is 30-43 mm, and the cross-sectional diameter of bamboo fiber is 12-20 μm.

[0009] Bamboo charcoal fiber layer: thickness is 0.264-0.504 mm, weight percentage is 40-80%; per square centimeter, there are 15-35 rhomboid mesh II on the bamboo charcoal fiber layer, the aperture of rhomboid mesh II is 20-60 mesh; in the bamboo charcoal fiber layer, the length of bamboo charcoal fiber is 38-51 mm, and the cross-sectional diameter of bamboo charcoal fiber is 10-22 μm.

[0010] Bamboo fiber layer II: thickness is 0.033-0.189 mm, weight percentage is 10-30%; per square centimeter, there are 15-35 rhomboid mesh III on bamboo fiber layer II, the mesh size of rhomboid mesh III is 20-60 mesh; in bamboo fiber layer II, the length of bamboo fiber is 30-43 mm, and the cross-sectional diameter of bamboo fiber is 12-20 μm.

[0011] The composite nonwoven fabric employs a three-layer structure, composed of fiber layer I, bamboo charcoal fiber layer, and bamboo fiber layer II, which are intertwined and bonded together using a hydroentangling process. The pore size of the rhomboid through-holes on the corresponding fiber layers is limited to 20-60 mesh. A higher mesh count (smaller pore size) increases the number of fibers per unit area, resulting in a larger surface area for odor absorption and antibacterial action. When the pore size is less than 20 mesh, the composite nonwoven fabric exhibits a fine mesh structure, making it prone to deformation during use. When the pore size is greater than 60 mesh, the antibacterial and deodorizing effects are poor, showing no significant difference from non-porous nonwoven fabrics.

[0012] The positional relationships such as "between", "upper", and "middle" involved in this technical solution are defined according to the actual usage conditions and are conventional terms in this technical field, as well as conventional terms used by those skilled in the art in actual use.

[0013] The beneficial technical effects of adopting this technical solution are as follows: I. In this utility model, the composite nonwoven fabric includes a bamboo fiber layer I, a bamboo charcoal fiber layer, and a bamboo fiber layer II. The bamboo charcoal fiber layer is disposed between the bamboo fiber layer I and the bamboo fiber layer II. Utilizing the inherent properties of the fibers, the outer bamboo fiber layer provides an antibacterial effect for the composite spunlace fabric, while the middle bamboo charcoal fiber layer provides odor adsorption. Furthermore, based on the diamond-shaped perforated texture of the composite spunlace nonwoven fabric, its large specific surface area enhances odor adsorption and further prevents the growth of harmful bacteria. Simultaneously, this composite nonwoven fabric has a simple structure and strong practicality. II. This utility model develops new application scenarios for bamboo fiber and bamboo charcoal fiber in spunlace nonwoven fabrics. Simultaneously, utilizing mature spunlace technology and diamond-shaped mesh belts, a porous spunlace nonwoven fabric is prepared. Bamboo fiber has antibacterial properties, and bamboo charcoal fiber has odor-absorbing properties. The resulting antibacterial and odor-removing spunlace nonwoven fabric can be applied to disposable hygiene products (incontinence pads, nursing pads, etc.); alternatively, by adjusting the spunlace process and controlling the fabric thickness, after paper lamination and coating, it can be used for wallpaper decoration, further reducing odors in the home environment. Third, in this utility model, by introducing an interlaced rhomboid mesh structure and further limiting the diameter of the rhomboid mesh, a certain diameter and an array of rhomboid through holes are formed. This can control the amount of liquid permeation when the composite nonwoven fabric is used as a sanitary material, and increase the contact area between the antibacterial layer bamboo fiber and the bacterial-producing substances, thereby increasing the antibacterial effect. Attached Figure Description

[0014] Figure 1 This is a top view of the present invention; Figure 2This is a cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the mesh curtain with diamond-shaped holes in the preparation of this utility model; Figure 4 This is a schematic diagram of the entanglement state of bamboo fiber and bamboo charcoal fiber in this utility model (wherein, the part in the red box is the part where the fibers are entangled and concentrated). Figure 5 This is a schematic diagram of the bamboo charcoal fiber structure in this utility model (wherein, the round or semi-circular holes are adsorption pores on the bamboo charcoal fiber). Figure 6 This is a schematic diagram illustrating the working principle involved in the production of this utility model; In the diagram, 1 represents bamboo fiber layer I, and 10 represents bamboo fiber I. 2. Bamboo charcoal fiber layer; 20. Bamboo charcoal fiber; 3. Bamboo fiber layer II; 30. Bamboo fiber II; 4. Rhomboid through hole; 5. Water jetting head; 6. Net forming machine; 60. Net curtain. Detailed Implementation

[0015] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0016] Example 1 This embodiment provides: an antibacterial and deodorizing bamboo fiber composite nonwoven fabric, such as... Figure 2 , Figure 4 As shown, it includes bamboo fiber layer I1, bamboo charcoal fiber layer 2, and bamboo fiber layer II3 stacked sequentially. Bamboo charcoal fiber layer 2 is located between bamboo fiber layer I1 and bamboo fiber layer II3. The bamboo fibers in bamboo fiber layer I1 are intertwined with the bamboo charcoal fibers 20 in bamboo charcoal fiber layer 2 (e.g., achieved by hydroentangling). The bamboo charcoal fibers 20 in bamboo charcoal fiber layer 2 are intertwined with the bamboo fibers in bamboo fiber layer II3 (e.g., achieved by hydroentangling). Rhomboid mesh I is evenly distributed on bamboo fiber layer I1, rhomboid mesh II is evenly distributed on bamboo charcoal fiber layer 2, and rhomboid mesh III is evenly distributed on bamboo fiber layer II3. The overlapping portion of rhomboid mesh I, rhomboid mesh II, and rhomboid mesh III in the vertical projection plane forms rhomboid through-hole 4 (e.g., Figure 1 As shown), the rhomboid through-hole 4 forms a continuous rhomboid channel in three-dimensional space; Furthermore, the rhomboid through holes 4 are distributed in an array on the composite nonwoven fabric.

[0017] One aspect utilizes the inherent properties of the fibers themselves; the outer layer of bamboo fiber provides antibacterial properties to the composite spunlace fabric, while the middle layer of bamboo charcoal fiber 20 provides odor absorption (such as...). Figure 5 (As shown in the image). On the other hand, based on the introduction of an interlaced diamond-shaped mesh structure, diamond-shaped through-holes 4 of a certain pore size are formed, which can control the liquid permeation when this composite nonwoven fabric is used as a sanitary material, and increase the contact area between the antibacterial layer bamboo fiber and the bacterial-producing substances, thereby increasing the antibacterial effect. Among them, the diamond-shaped through-holes 4 of the composite spunlace fabric have a large specific surface area, which has a better adsorption effect on odors and further prevents the growth of harmful bacteria in the fibers.

[0018] Example 2 Based on Example 1, this example further defines the composite nonwoven fabric: The diameter of the rhomboid through-hole 4 is 20-60 mesh, and the number of rhomboid through-holes 4 is 23-27 per cm. 2 This specification ensures antibacterial and deodorizing effects, effectively realizing the functionality of composite nonwoven fabric. The thickness of the composite nonwoven fabric is 0.33-0.63mm. This thickness limitation ensures that the composite nonwoven fabric can be further processed according to actual needs, such as: applied to disposable hygiene products (incontinence pads, nursing pads, etc.); or, by adjusting the hydroentangling process to control its fabric thickness, after being covered with paper and laminated, it can be used for decorative wallpaper, which can further reduce the odor in the house.

[0019] Example 3 Based on Examples 1-2, this example further defines the rhomboid mesh I, rhomboid mesh II, and rhomboid mesh III to achieve a continuous rhomboid channel in three-dimensional space by using the rhomboid through-holes 4: Among them, the apertures of rhombus mesh I, rhombus mesh II, and rhombus mesh III are equal; The overlapping area between rhombus mesh I and rhombus mesh II accounts for 40-60% of the area per unit aperture; the overlapping area between rhombus mesh II and rhombus mesh III accounts for 40-60% of the area per unit aperture; and the overlapping area between rhombus mesh I and rhombus mesh III accounts for 10-40% of the area per unit aperture. Specifically, the area per unit aperture refers to the aperture area of ​​rhombus mesh I, rhombus mesh II, or rhombus mesh III. To achieve the formation of the rhomboid through-hole 4, after the bamboo fiber layer I1, bamboo charcoal fiber layer 2, and bamboo fiber layer II3 are composited into one piece, a high-pressure water jet is applied at an angle to pass through them; simultaneously, the bamboo charcoal fiber 20 and bamboo fiber are intertwined. The water pressure can be adjusted according to actual needs.

[0020] Example 4 Based on Examples 1-3, this example further defines the bamboo fiber layer I1: The thickness of bamboo fiber layer I1 is 0.033-0.189 mm, and its weight percentage is 10-30%; per square centimeter, there are 15-35 rhomboid mesh holes I, and the aperture of rhomboid mesh holes I is 20-60 mesh. In bamboo fiber layer I1, the length of bamboo fibers is 30-43 mm and the cross-sectional diameter of bamboo fibers is 12-20 μm.

[0021] By controlling the thickness of the bamboo fiber layer I1, the weight ratio of bamboo fiber in the composite nonwoven fabric is further determined. If the thickness is greater than this, the proportion of bamboo fiber in the composite nonwoven fabric is larger, which is not conducive to the odor adsorption function of the composite nonwoven fabric; if the thickness is less than this, the proportion of bamboo fiber in the composite nonwoven fabric is smaller, which is not conducive to the antibacterial function of the composite nonwoven fabric. That is, by limiting the thickness of the bamboo fiber layer I1 to 0.033-0.189 mm, the odor adsorption and antibacterial functions of the composite nonwoven fabric can be further balanced. By designing the size of the diamond-shaped mesh I, the number of mesh openings per unit area and the mesh count of the composite nonwoven fabric can be controlled. For example, if the diameter of the diamond-shaped mesh I is too large, the proportion of bamboo fiber in the composite nonwoven fabric will be smaller, which is not conducive to the antibacterial function of the composite nonwoven fabric; if the diameter of the diamond-shaped mesh I is too small, it will be difficult to achieve in terms of process. By limiting the length and diameter of bamboo fibers (bamboo fibers are elliptical, but are considered cylindrical due to the two-dimensional planar appearance of their microstructure during imaging), the aspect ratio of bamboo fibers is controlled, which helps to ensure more uniform web formation after the bamboo fibers pass through the carding machine. An excessively large or small aspect ratio of bamboo fibers is detrimental to the uniformity of fiber carding during the composite nonwoven fabric forming stage, affecting the uniformity of the composite nonwoven fabric's antibacterial and deodorizing functions.

[0022] Example 5 Based on Examples 1-4, this example further defines the bamboo charcoal fiber layer 2: The thickness of the bamboo charcoal fiber layer 2 is 0.264-0.504 mm, and its weight percentage is 40-80%. On a per square centimeter basis, there are 15-35 rhomboid mesh II on the bamboo charcoal fiber layer 2, and the pore size of the rhomboid mesh II is 20-60 mesh. In the bamboo charcoal fiber layer 2, the length of the bamboo charcoal fiber 20 is 38-51 mm, and the cross-sectional diameter of the bamboo charcoal fiber 20 is 10-22 μm.

[0023] By controlling the thickness of the bamboo charcoal fiber layer 2, the weight percentage of bamboo charcoal fiber 20 in the composite nonwoven fabric is further determined. If the thickness is greater than this, the proportion of bamboo charcoal fiber 20 in the composite nonwoven fabric is larger, which is not conducive to the antibacterial function of the composite nonwoven fabric; if the thickness is less than this, the proportion of carbon fiber in the composite nonwoven fabric is smaller, which is not conducive to the odor adsorption function of the composite nonwoven fabric. That is, by limiting the thickness of the bamboo charcoal fiber layer 2 to 0.264-0.504 mm, the odor adsorption and antibacterial functions of the composite nonwoven fabric can be further balanced. By designing the size of the diamond-shaped mesh II, the number of mesh openings per unit area and the mesh count of the composite nonwoven fabric can be controlled. For example, if the diameter of the diamond-shaped mesh II is too large, the proportion of bamboo charcoal fiber 20 in the composite nonwoven fabric will be smaller, which is not conducive to the odor adsorption function of the composite nonwoven fabric; if the diameter of the diamond-shaped mesh II is too small, it will be difficult to achieve in the process. By limiting the length and diameter of bamboo charcoal fiber 20 and controlling its aspect ratio, it is beneficial for the bamboo charcoal fiber 20 to be laid more evenly after passing through the carding machine. If the aspect ratio of bamboo charcoal fiber 20 is too large or too small, it will be detrimental to the uniformity of fiber carding during the forming stage of the composite nonwoven fabric, thus affecting the uniformity of the antibacterial and deodorizing functions of the composite nonwoven fabric.

[0024] Example 6 Based on Examples 1-5, this example further defines the bamboo charcoal fiber layer 2: The thickness of bamboo fiber layer II3 is 0.033 to 0.189 mm, and its weight percentage is 10% to 30%. On a per square centimeter basis, there are 15 to 35 diamond-shaped mesh openings III, and the mesh size of diamond-shaped mesh openings III is 20 to 60 mesh. In bamboo fiber layer II3, the bamboo fiber length is 30–43 mm and the cross-sectional diameter of the bamboo fiber is 12–20 μm.

[0025] By controlling the thickness of the bamboo fiber layer II3, the weight ratio of bamboo fiber in the composite nonwoven fabric is further determined. If the thickness is greater than this, the proportion of bamboo fiber in the composite nonwoven fabric is larger, which is not conducive to the odor adsorption function of the composite nonwoven fabric; if the thickness is less than this, the proportion of bamboo fiber in the composite nonwoven fabric is smaller, which is not conducive to the antibacterial function of the composite nonwoven fabric. That is, by limiting the thickness of the bamboo fiber layer II3 to 0.033-0.189 mm, the odor adsorption and antibacterial functions of the composite nonwoven fabric can be further balanced. By designing the size of the diamond-shaped mesh III, the number of mesh openings per unit area and the mesh count of the composite nonwoven fabric can be controlled. For example, if the diameter of the diamond-shaped mesh III is too large, the proportion of bamboo fiber in the composite nonwoven fabric will be smaller, which is not conducive to the antibacterial function of the composite nonwoven fabric; if the diameter of the diamond-shaped mesh III is too small, it will be difficult to achieve in terms of process. By limiting the length and diameter of bamboo fibers (bamboo fibers are elliptical, but are considered cylindrical due to the two-dimensional planar appearance of their microstructure during imaging), the aspect ratio of bamboo fibers is controlled, which helps to ensure more uniform web formation after the bamboo fibers pass through the carding machine. An excessively large or small aspect ratio of bamboo fibers is detrimental to the uniformity of fiber carding during the composite nonwoven fabric forming stage, affecting the uniformity of the composite nonwoven fabric's antibacterial and deodorizing functions.

[0026] Example 7 Based on Examples 1-6, this example provides: a method for preparing an antibacterial and deodorizing bamboo fiber composite nonwoven fabric, comprising the following steps: S1: After combing the bamboo fiber and bamboo charcoal fiber 20 separately, the resulting bamboo fiber layer I1, bamboo charcoal fiber layer 2, and bamboo fiber layer II3 are layered sequentially and then passed through a mesh curtain 60 with diamond-shaped mesh holes in a web forming machine 6 (e.g., ...). Figure 3 (As shown) is transferred to the hydroentangling machine; S2: In a hydroentangling machine, an angled hydroentangling process is used to form an array of diamond-shaped through-holes 4 on the composite layer. These through-holes can be formed on a web-forming platform, such as... Figure 6 As shown, adjust the angle between the spunlace head 5 in the spunlace machine and the screen 60 of the screen forming machine 6. For example, when a large non-overlapping area is required, set the screen 60 of the screen forming machine 6 to be horizontal. At this time, by simply adjusting the spunlace head 5 to form an angle with the screen 60 of the screen forming machine 6, the non-overlapping area can be increased to 100%. When a small amount of non-overlapping area is required, the rear end of the web forming machine 6 lifts the web curtain 60 within a certain range via guide rollers. At the same time, the hydroentanglement head 5 is also tilted at a certain angle. The surface of the composite nonwoven fabric is close to a flat angle with the hydroentanglement head 5, which can reduce the non-overlapping area to 0%.

[0027] It should be noted that, considering actual production conditions and the actual performance of the composite nonwoven fabric, in bamboo fiber layer I1, bamboo charcoal fiber layer 2, and bamboo fiber layer II3, the overlapping area between rhomboid mesh I and rhomboid mesh II accounts for 40-60% of the area per unit pore size, the overlapping area between rhomboid mesh II and rhomboid mesh III accounts for 40-60% of the area per unit pore size, and the overlapping area between rhomboid mesh I and rhomboid mesh III accounts for 10-40% of the area per unit pore size. S3: The composite nonwoven fabric with diamond-shaped through holes 4 is conveyed to a dryer and dried to obtain a composite nonwoven fabric with diamond-shaped through holes 4.

[0028] The antibacterial rate and adsorption rate of the composite nonwoven fabric with diamond-shaped through holes obtained above were tested against those of a conventional plain weave composite nonwoven fabric (with bamboo fiber layer as the upper layer, bamboo charcoal fiber layer 2 as the middle layer, and bamboo fiber layer as the lower layer). The results are shown in Table 1 below.

[0029] Table 1

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A type of antibacterial and deodorizing bamboo fiber composite nonwoven fabric, characterized in that, It includes bamboo fiber layer I (1), bamboo charcoal fiber layer (2) and bamboo fiber layer II (3) stacked in sequence. The bamboo charcoal fiber layer (2) is located between bamboo fiber layer I (1) and bamboo fiber layer II (3). The bamboo fibers in bamboo fiber layer I (1) and bamboo charcoal fibers (20) in bamboo charcoal fiber layer (2) are intertwined. The bamboo charcoal fibers (20) in bamboo charcoal fiber layer (2) and bamboo fibers in bamboo fiber layer II (3) are intertwined. Rhomboid mesh I is evenly distributed on bamboo fiber layer I (1), rhomboid mesh II is evenly distributed on bamboo charcoal fiber layer (2), and rhomboid mesh III is evenly distributed on bamboo fiber layer II (3). The overlapping part of rhomboid mesh I, rhomboid mesh II and rhomboid mesh III in the vertical projection plane forms rhomboid through hole (4). The rhomboid through hole (4) forms a continuous rhomboid channel in three-dimensional space. Furthermore, the rhomboid through holes (4) are distributed in an array on the composite nonwoven fabric.

2. The antibacterial and deodorizing bamboo fiber composite nonwoven fabric according to claim 1, characterized in that, The diameter of the rhomboid through-hole (4) is 20-60 mesh, and the number of rhomboid through-holes (4) is 23-27 per cm. 2 .

3. The antibacterial and deodorizing bamboo fiber composite nonwoven fabric according to claim 1, characterized in that, The thickness of the composite nonwoven fabric is 0.33–0.63 mm.

4. The antibacterial and deodorizing bamboo fiber composite nonwoven fabric according to claim 1, 2, or 3, characterized in that, The apertures of rhombus mesh I, rhombus mesh II, and rhombus mesh III are all equal; The overlapping area between rhombus mesh I and rhombus mesh II accounts for 40-60% of the area per unit aperture, the overlapping area between rhombus mesh II and rhombus mesh III accounts for 40-60% of the area per unit aperture, and the overlapping area between rhombus mesh I and rhombus mesh III accounts for 10-40% of the area per unit aperture.

5. The antibacterial and deodorizing bamboo fiber composite nonwoven fabric according to claim 4, characterized in that, The thickness of the bamboo fiber layer I (1) is 0.033 to 0.189 mm; per square centimeter, there are 15 to 35 rhomboid mesh holes I on the bamboo fiber layer I (1), and the aperture of the rhomboid mesh holes I is 20 to 60 mesh.

6. The antibacterial and deodorizing bamboo fiber composite nonwoven fabric according to claim 5, characterized in that, In the bamboo fiber layer Ⅰ(1), the length of the bamboo fiber is 30-43 mm and the diameter of the cross-section of the bamboo fiber is 12-20 μm.

7. The antibacterial and deodorizing bamboo fiber composite nonwoven fabric according to claim 4, characterized in that, The thickness of the bamboo charcoal fiber layer (2) is 0.264 to 0.504 mm; per square centimeter, there are 15 to 35 rhomboid mesh II on the bamboo charcoal fiber layer (2), and the aperture of the rhomboid mesh II is 20 to 60 mesh.

8. The antibacterial and deodorizing bamboo fiber composite nonwoven fabric according to claim 7, characterized in that, In the bamboo charcoal fiber layer (2), the length of the bamboo charcoal fiber (20) is 38-51 mm, and the cross-sectional diameter of the bamboo charcoal fiber (20) is 10-22 μm.

9. The antibacterial and deodorizing bamboo fiber composite nonwoven fabric according to claim 4, characterized in that, The thickness of the bamboo fiber layer II (3) is 0.033 to 0.189 mm; per square centimeter, there are 15 to 35 rhomboid mesh III on the bamboo fiber layer II (3), and the mesh size of the rhomboid mesh III is 20 to 60 mesh.

10. The antibacterial and deodorizing bamboo fiber composite nonwoven fabric according to claim 9, characterized in that, In the bamboo fiber layer II (3), the length of the bamboo fiber is 30-43 mm and the diameter of the cross-section of the bamboo fiber is 12-20 μm.

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