Degradable antibacterial non-woven fabric

Abstract

The utility model provides a degradable antibacterial non-woven fabric, which relates to the technical field of non-woven fabric production and comprises a plurality of fiber units. Each fiber unit comprises a first fiber layer, a wood pulp fiber layer and a second fiber layer which are sequentially arranged from top to bottom; the wood pulp fiber layer is clamped by the first fiber layer and the second fiber layer; a rectangular hole is formed in the center of the wood pulp fiber layer, and the first fiber layer and the second fiber layer are connected in an I shape through the rectangular hole; the first fiber layer and the second fiber layer are fiber layers comprising PLA fiber master batches and antibacterial master batches. According to the antibacterial non-woven fabric, the technical problem that in the prior art, due to the fact that the PLA layer is directly used for wrapping the fiber layer, the antibacterial non-woven fabric is extremely prone to layering in the using process is solved, and the technical effect that the locking performance is good on the premise that antibacterial performance and degradability are guaranteed is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to non - woven production technical field especially is related to a kind of degradable antibacterial non - woven fabrics. BACKGROUND

[0002] Non - woven fabric, it is a kind of cloth not by traditional textile method is made. It is made of directional or random arrangement fiber, and is consolidated into cloth by machine, heat bonding or chemical method. Non - woven fabric has multiple excellent characteristics, for example, moisture-proof, breathable, flexible, light in weight, non - combustible, easy to decompose, non - toxic and non - irritating, color is rich and the price is low. As a new generation of environmental protection material, non - woven fabric is widely used in medical health, agriculture, industrial use, household supplies and multiple fields.

[0003] And PLA (poly lactic acid) is a new type of biodegradable material, can be degraded in natural environment, reduce environmental pollution, while can make product surface form weak acidic environment, has bacteriostatic and mildewproof effect.

[0004] Antibacterial non - woven fabric in prior art directly utilizes PLA layer to be covered in fiber layer outside, i.e. from top to bottom interval mode is spun-bonded together or hydroentangled together with the two;Although the problem of antibacterial non - woven fabric can be effectively solved by PLA, but due to the hygroscopicity of fiber layer, the fiber layer itself is not good, not wear -resistant, and the non - woven fabric is easily layered during use, which cannot guarantee the sustained and effective antibacterial effect. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of degradable antibacterial non - woven fabric to alleviate the technical problem of antibacterial non - woven fabric directly utilizing PLA layer to be covered in fiber layer outside in prior art, and it is easily layered during use.

[0006] The utility model provides a kind of degradable antibacterial non - woven fabric, is made of multiple fiber layers, comprising: multiple fiber units;

[0007] Each fiber unit includes first fiber layer, wood pulp fiber layer and second fiber layer sequentially arranged from top to bottom;

[0008] Wood pulp fiber layer is clamped by first fiber layer and second fiber layer;

[0009] Rectangular hole is provided in the center position of wood pulp fiber layer, and first fiber layer and second fiber layer are connected in the shape of H-beam via rectangular hole;

[0010] First fiber layer and second fiber layer are fiber layer including PLA fiber master batch and antibacterial master batch.

[0011] Further, the multiple fiber units comprising multiple fiber layers are formed by hydroentangling method.

[0012] Further, the I-shaped connection of the first fiber layer and the second fiber layer is formed by a hot rolling method.

[0013] Further, the rectangular hole is matched with the shape of the connection of the first fiber layer and the second fiber layer.

[0014] Further, the side length of the rectangular hole is 0.5cm-3cm.

[0015] Further, the first fiber layer and the second fiber layer are short fibers formed by melt spinning and cutting.

[0016] Further, the length of the short fiber is 3mm-5mm.

[0017] Further, the antibacterial master batch comprises one of chitin, castor oil, titanium dioxide, zinc oxide, silver ions or quaternary ammonium salt.

[0018] Further, the weight percentage content of the antibacterial master batch is not more than 5wt%.

[0019] Further, the fiber fineness of the wood pulp fiber layer is 2.4D-3D.

[0020] Beneficial effects:

[0021] The utility model provides a degradable antibacterial non -woven fabric which is composed of multiple fiber layers and comprises multiple fiber units, wherein each fiber unit comprises a first fiber layer, a wood pulp fiber layer and a second fiber layer arranged from top to bottom in sequence. The wood pulp fiber layer is clamped by the first fiber layer and the second fiber layer. Since the wood pulp fiber is environmentally friendly, it has good air permeability and moisture absorption, but its strength is not good enough and its wear resistance is not enough. The problem can be overcome by adding two layers of PLA fiber layer.

[0022] A rectangular hole is formed in the center of the wood pulp fiber layer, and the first fiber layer and the second fiber layer are connected in an I-shaped manner through the rectangular hole. By forming the rectangular hole, the first fiber layer, the second fiber layer and the wood pulp fiber layer can be better locked together. The PLA fibers at the upper and lower ends of the non -woven fabric are weakly acidic, which can inhibit the growth of microorganisms and have significant antibacterial properties. It is convenient to lock in the later stage and avoid the possibility of delamination caused by direct coating.

[0023] The first fiber layer and the second fiber layer are fiber layers containing PLA fiber master batch and antibacterial master batch. The antibacterial agent in the antibacterial master batch can be released persistently, and the antibacterial effect can be maintained for a long time.

[0024] The wood pulp fiber and the PLA fiber are locked by the "H" shaped distribution, the antibacterial performance can be enhanced without layering, and the non-woven fabric combined by the wood pulp fiber and the PLA fiber can ensure the degradability and reduce environmental pollution. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the following description of the specific embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 The structure schematic diagram of the degradable antibacterial non-woven fabric provided by the embodiment of the present application is shown in the figure.

[0027] Figure 2 The schematic diagram of the fiber unit winding of the degradable antibacterial non-woven fabric provided by the embodiment of the present application is shown in the figure.

[0028] Figure 3 The structure schematic diagram of the first fiber layer and the second fiber layer in the degradable antibacterial non-woven fabric provided by the embodiment of the present application is shown in the figure.

[0029] Figure 4 The structure schematic diagram of the wood pulp fiber layer in the degradable antibacterial non-woven fabric provided by the embodiment of the present application is shown in the figure.

[0030] Icon: 100-fiber unit; 200-first fiber layer; 300-wood pulp fiber layer; 301-rectangular hole; 400-second fiber layer. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application, provided in the accompanying drawings, is not intended to limit the scope of the claimed application, but merely represents the selected embodiment of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0033] It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0034] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, and are merely for the convenience of describing the present application and simplifying the description, and therefore, cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0035] In addition, the terms "horizontal", "vertical", "overhanging", and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0036] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided", "mounted", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the case of no conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0038] As Figure 1 , Figure 2 The present embodiment provides a degradable antibacterial non-woven fabric composed of multiple fiber layers, comprising: a plurality of fiber units 100;

[0039] Each fiber unit 100 includes a first fiber layer 200, a wood pulp fiber layer 300 and a second fiber layer 400 arranged in order from top to bottom.

[0040] The wood pulp fiber layer 300 is clamped by the first fiber layer 200 and the second fiber layer 400.

[0041] A rectangular hole 301 is formed at the center of the wood pulp fiber layer 300, and the first fiber layer 200 and the second fiber layer 400 are connected in the shape of an H through the rectangular hole 301.

[0042] The first fiber layer 200 and the second fiber layer 400 are fiber layers including PLA fiber master batches and antibacterial master batches.

[0043] Specifically, as shown in Figure 3 and Figure 4 The degradable antibacterial non-woven fabric is a multi-layer fiber layer formed by winding after hot rolling, and the multi-layer fiber layer is made of a plurality of fiber units 100. Each fiber unit 100 includes a three-layer structure, that is, a first fiber layer 200, a wood pulp fiber layer 300 and a second fiber layer 400 arranged in order from top to bottom. Since the wood pulp fiber layer 300 is environmentally friendly, it has good air permeability and moisture absorption, but the strength is not good enough, and the wear resistance is not enough. By increasing the first fiber layer 200 and the second fiber layer 400, the problem can be overcome.

[0044] A rectangular hole 301 is formed at the center of the wood pulp fiber layer 300; the first fiber layer 200 and the second fiber layer 400 are connected in the shape of an H through the rectangular hole 301, so that the wood pulp fiber layer 300 can be entangled with the first fiber layer 200 and the second fiber layer 400, thereby improving the strength of the wood pulp fiber layer 300 and preventing delamination during use. After the wood pulp fiber layer 300 is clamped by the first fiber layer 200 and the second fiber layer 400, the prepared non-woven fabric can improve the tensile strength and folding endurance of the non-woven fabric as a whole, and enhance the mechanical properties; at the same time, both are degradable materials, and such non-woven fabric can be naturally decomposed after being discarded, reducing the impact on the environment and meeting environmental protection requirements.

[0045] The first fiber layer 200 and the second fiber layer 400 are fiber layers including PLA fiber master batches and antibacterial master batches. The PLA fiber in the first fiber layer 200 and the second fiber layer 400 can effectively inhibit wound infection due to its high specific surface area and high porosity, and the first fiber layer 200 and the second fiber layer 400 also include antibacterial master batches, so the antibacterial property can be greatly improved to effectively inhibit wound infection.

[0046] In the embodiment of the utility model, the plurality of fiber units 100 including the multi-layer fiber layer are formed by a water jet method.

[0047] The connection of the I-shaped first fiber layer 200 and the I-shaped second fiber layer 400 is formed by a hot rolling method.

[0048] Specifically, the spunlace method impacts the web by high-speed high-pressure water flow, promotes the mutual entanglement and cohesion of the first fiber layer 200, the second fiber layer 400 and the wood pulp fiber layer 300, enhances the bonding force between the fibers, and the spunlace method can make the fibers uniformly distributed in the web, improve the consistency and uniformity of the product. After the three-layer structure is combined by water jet, hot rolling is used to melt part of the fibers in the plurality of fiber units 100 by heating and pressurizing, so as to bond the first fiber layer 200, the second fiber layer 400 and the wood pulp fiber layer 300, and after cooling, the fiber unit 100 is reinforced to become a non-woven fabric with certain strength, preventing delamination.

[0049] In the embodiment of the utility model, the rectangular hole 301 is matched with the connection of the first fiber layer 200 and the second fiber layer 400 in shape.

[0050] The side length of the rectangular hole 301 is 0.5cm-3cm.

[0051] Specifically, the rectangular hole 301 is matched with the connection of the first fiber layer 200 and the second fiber layer 400 in shape, so that when the first fiber layer 200 and the second fiber layer 400 clamp the wood pulp fiber layer 300, there is no gap between the three, which can effectively prevent bacteria from entering the wood pulp fiber layer 300 from the gap, thereby enhancing the antibacterial performance of the overall material. This seamless clamping structure can reduce the adhesion and penetration of bacteria. At the same time, the tightly clamped structure can make the mechanical properties more uniformly distributed in the non-woven fabric, improving the tensile strength and tear resistance of the non-woven fabric.

[0052] In the embodiment of the utility model, the first fiber layer 200 and the second fiber layer 400 are short fibers formed by melt spinning and cutting.

[0053] The length of the short fiber is 3mm-5mm.

[0054] The antibacterial master batch includes one of chitin, castor oil, TiO2, ZnO or quaternary ammonium salt.

[0055] The weight percentage content of the antibacterial master batch is not less than 5wt%.

[0056] Specifically, since the antibacterial agent is not easy to be exposed on the outside of the non-woven fabric to form an antibacterial layer, it is easy to fall off after use due to friction, which affects the antibacterial property, so the structure of the PLA master batch and the antibacterial master batch melt spinning forms the short fiber, so that the first fiber layer 200 and the second fiber layer 400 formed by the fusion of the antibacterial agent and the PLA have better antibacterial effect under the condition that the PLA fiber itself has natural antibacterial property.

[0057] The prepared short fibers have a length of 3mm to 5mm and good dimensional stability. After being discarded, the nonwoven fabric can be decomposed into carbon dioxide and water in soil or seawater by microorganisms, reducing environmental pollution.

[0058] The antibacterial agents in antibacterial masterbatches can be released persistently, maintaining their antibacterial effect for a long time. Antibacterial masterbatches can include natural, inorganic, or organic agents. It should be noted that antibacterial masterbatches include, but are not limited to, one of the following: chitosan, castor oil, titanium dioxide, zinc oxide, silver ions, or quaternary ammonium salts.

[0059] Although a higher content of antibacterial agent in antibacterial masterbatch results in a better antibacterial effect, the content needs to be balanced to avoid affecting the performance of the final nonwoven fabric. Therefore, the content of antibacterial masterbatch is controlled to be no more than 5 wt%.

[0060] In the embodiments of this utility model, the fiber fineness of the wood pulp fiber layer 300 is 2.4D to 3D.

[0061] Specifically, the wood pulp fiber layer 300 has a fiber fineness of 2.4D to 3D. While ensuring strength, it can maximize the softness and comfort of the nonwoven fabric, ensuring breathability and moisture absorption. Furthermore, the fine fibers can increase the entanglement points between fibers during the hydroentangling process, thereby improving the durability of the nonwoven fabric.

[0062] Based on the above embodiments, the manufacturing process of the biodegradable antibacterial nonwoven fabric provided by this utility model is as follows:

[0063] PLA masterbatch and antibacterial masterbatch are melt-spun and cut into PLA antibacterial short fibers. Then, a three-layer web is laid. The first and third layers are the first fiber layer 200 and the second fiber layer 400. Several fiber units 100 are evenly distributed with a center-to-center spacing of 0.5cm to 3cm around the middle wood pulp fiber layer 300. They are then pre-hydroentangled and spun into a dry state after 4 to 8 hydroentanglements. They are then hot-rolled at a temperature of 170℃ to 200℃, so that the first fiber layer 200 and the second fiber layer 400 are connected in an "I" shape through rectangular holes 301. Finally, they are wound into a biodegradable antibacterial nonwoven fabric.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A degradable antibacterial nonwoven fabric composed of a plurality of fiber layers, characterized by, The application relates to a multi-layer fiber unit, which comprises: a plurality of fiber units (100); each of the fiber units (100) comprises a first fiber layer (200), a wood pulp fiber layer (300) and a second fiber layer (400) arranged in sequence from top to bottom; the wood pulp fiber layer (300) is clamped by the first fiber layer (200) and the second fiber layer (400); a rectangular hole (301) is arranged at the center position of the wood pulp fiber layer (300), and the first fiber layer (200) and the second fiber layer (400) are connected in an H-shaped mode through the rectangular hole (301); the first fiber layer (200) and the second fiber layer (400) are fiber layers comprising PLA fiber master batches and antibacterial master batches; the plurality of fiber units (100) of the multi-layer fiber layer are formed by a water jet method; the H-shaped connection of the first fiber layer (200) and the second fiber layer (400) is formed by a hot rolling method.

2. The degradable antibacterial nonwoven fabric according to claim 1, characterized by, The rectangular hole (301) is matched in shape with the connection position of the first fiber layer (200) and the second fiber layer (400).

3. The degradable antibacterial nonwoven fabric according to claim 2, characterized by, The side length of the rectangular hole (301) is 0.5cm-3cm.

4. The degradable antibacterial nonwoven fabric according to claim 1, characterized by, The first fiber layer (200) and the second fiber layer (400) are short fibers formed by melt spinning and cutting.

5. The degradable antibacterial nonwoven fabric according to claim 4, characterized by, The length of the short fibers is 3mm-5mm.

6. The degradable antibacterial nonwoven fabric according to claim 1, wherein The antibacterial master batch comprises one of chitin, castor oil, titanium dioxide, zinc oxide, silver ions or quaternary ammonium salt.

7. The degradable antibacterial nonwoven fabric according to claim 1, wherein The fiber fineness of the wood pulp fiber layer (300) is 2.4D-3D.

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