Composite non-woven fabric with directional arrangement structure and preparation method of composite non-woven fabric

Abstract

The invention relates to the technical field of composite non-woven fabrics, and discloses a composite non-woven fabric with a directional arrangement structure, the composite non-woven fabric comprises a first fiber web layer, a second fiber web layer and a third fiber web layer, the second fiber web layer is a yarn net structure formed by warp knitting and weft knitting of viscose long fibers, the first fiber web layer is provided with a plurality of first protrusions, and the third fiber web layer is provided with a plurality of second protrusions. At least one first guide hole penetrating through the fiber web layer is formed in an area enclosed by the plurality of first bulges; at least one part of fibers of the first fiber layer extend towards the direction of the second fiber layer and extend into the second fiber layer, and at least one part of fibers of the second fiber layer extend towards the direction of the third fiber layer and extend into the third fiber layer. Due to the fibers and the guide holes which are arranged directionally, the effects of improving the liquid absorption wetting speed of the composite non-woven fabric and shortening the drying time are achieved, energy is saved, the production efficiency is improved, and therefore the production cost is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of composite nonwoven fabrics, and more specifically to a composite nonwoven fabric with a fast liquid-absorbing directional arrangement structure and a preparation method thereof. Background Art

[0002] At present, there are two types of commonly used wiping materials on the market. One is toilet paper / dry wipes, which are dry under normal conditions and have limited use scenarios. It is difficult to remove stubborn and sticky stains and has limited cleaning power. The other is wet wipes. The portability, cleanliness and comfort of wet wipes have gradually been recognized by consumers and integrated into every corner of life. Wet wipes have strong cleaning ability and certain antibacterial ability. However, it is strongly related to the liquid content of the wet wipes. Too low or too high a liquid content in the wet wipes will reduce the cleaning ability of the wet wipes.

[0003] Nonwoven fabric is a kind of fabric that does not require spinning and weaving. It is made of textile short fibers or filaments to form a fiber web structure, and then reinforced by mechanical, thermal bonding or chemical methods. It breaks through the traditional textile principles and has the characteristics of short process flow, fast production speed, high output, low cost, wide application and multiple sources of raw materials. Wet wipes are mostly made of nonwoven fabric composites, and dry cloth without wetting can also be used as face towels or absorbent towels in a variety of scenarios.

[0004] With the development of society, the intensification of competition and the increase in demand, traditional production efficiency and production costs can no longer meet market demand. In order to improve production efficiency and reduce production costs, it is necessary to improve existing composite nonwoven fabrics. Summary of the invention

[0005] The present invention provides a composite nonwoven fabric with a directional arrangement structure and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A composite nonwoven fabric with a directional arrangement structure, comprising, from top to bottom, a first fiber web layer, a second fiber web layer and a third fiber web layer; The first fiber web layer and the third fiber web layer are both formed by entanglement and interweaving of their fibers, and the second fiber web layer is a yarn mesh structure of viscose fiber long fiber warp knitting and weft weaving, which serves as the "skeleton and meridian" of the three-layer composite fabric; The first fiber web layer is provided with a plurality of first protrusions, and at least one first guide hole penetrating the fiber web layer is provided in the area enclosed by the plurality of first protrusions; At least a portion of the fibers of the first fiber layer extend toward the second fiber layer and extend into the second fiber layer, and at least a portion of the fibers of the second fiber layer extend toward the third fiber layer and extend into the third fiber layer.

[0007] By sandwiching the second fiber mesh layer of the yarn mesh structure composed of viscose fiber long fiber warp knitting and weft weaving between the first fiber mesh layer and the third fiber mesh layer formed by fiber entanglement and interweaving, the second fiber mesh layer serves as the "skeleton and meridians" of the three-layer composite fabric, which can provide the composite non-woven fabric with higher tensile strength resistance, improve the isotropy of the fabric, reduce the elongation at break, and also play the role of guiding meridians during liquid infiltration, quickly wetting the entire fabric. The mesh diameter of the yarn mesh structure of the second fiber mesh layer is preferably 5mm-10mm, and the skeleton and drainage effects are better. At the same time, the fibers extending from the first fiber layer to the second fiber layer and extending into the fibers extending from the second fiber layer to the third fiber layer, as well as the guide holes, form a directional arrangement structure, which plays a role in combining fibers, making the composite connection between fiber layers tight, and at the same time, plays a role in guiding liquid when it is infiltrated, especially at the guide holes, which can be formed by pressurized water spunlace, can quickly absorb liquid, effectively improve the liquid absorption and wetting speed of the composite nonwoven fabric, and the directional arrangement of fibers and guide holes can also improve the penetration rate and heat transfer efficiency of the hot air flow during the drying process, shorten the drying time, and save energy. The production efficiency is improved from the liquid absorption and drying process, thereby reducing the production cost. The protrusions are pearl-shaped protrusions obtained by mechanical embossing, and the diameter of the protrusions is preferably 5mm-7mm, which not only effectively increases the contact area of ​​the single point of the protrusions, but also ensures the soft feeling of human skin when it contacts the wet wipes. Through the design of the protrusions, the ability to store dirt and dirt can be improved, the wiping effect can be improved, and in combination with the guide holes and the combined fibers, especially when used as a dry wipe, the dirt can be quickly introduced into the interior of the composite non-woven fabric.

[0008] Viscose fiber filaments are preferably twisted into viscose fiber filament yarns by a certain amount of viscose fiber filaments, and the viscose fiber filament yarns are formed into a mesh fabric on a warp knitting and weft weaving textile machine. While improving the fiber strength and tensile strength of the composite nonwoven fabric, it also improves the efficiency of liquid infiltration and shortens the infiltration time.

[0009] The third fiber mesh layer is evenly distributed with a plurality of second protrusions, and at least one second guide hole penetrating the fiber mesh layer is arranged in the area enclosed by the plurality of second protrusions, and at least a portion of the fibers of the third fiber layer extend toward the second fiber layer and extend into the second fiber layer, and at least a portion of the fibers of the second fiber layer extend toward the first fiber layer and extend into the first fiber layer. The bidirectional rapid liquid absorption of the composite nonwoven fabric is achieved, and the liquid absorption and wetting speed and drying efficiency of the nonwoven fabric are further improved, the production efficiency is improved, and the production cost is reduced.

[0010] At least a portion of the fibers of the first fiber layer extend to the third fiber layer. At least a portion of the fibers of the third fiber layer extend to the first fiber layer. This can further enhance the composite connection and fastening effect between the fiber layers.

[0011] The first fiber mesh layer is provided with a first groove, and the third fiber mesh layer is provided with a second groove, and the directions of the first groove and the second groove are perpendicular to each other. The depth of the first groove and the second groove is 0.5mm-1mm. The depth of the first groove and the second groove is less than or equal to 1 / 2 of the thickness of the protrusion, which can effectively increase the contact area and reduce the influence of the surface tension of the liquid on the absorption speed through the height difference. Through the design of the first groove and the second groove, the grooves are arranged in a criss-cross manner, which is conducive to the rapid wetting of the composite non-woven fabric, increases the friction area, and improves the wiping effect. The grooves also increase the penetration rate and heat transfer efficiency of the high-speed hot air flow during the drying process, shorten the drying time, save energy, improve production efficiency, and reduce production costs.

[0012] At least a portion of the guide holes of the first fiber layer are connected to the first groove. At least a portion of the guide holes of the third fiber layer are connected to the second groove. Through the connection and coordination of the guide holes and the grooves, the liquid absorption and wetting speed and drying efficiency of the composite nonwoven fabric are further improved, the production efficiency is improved, and the production cost is reduced.

[0013] At least a portion of the first guide holes is perpendicular to or forms an angle of 60 degrees with the plane where the first fiber web layer is located, and / or at least a portion of the second guide holes is perpendicular to or forms an angle of 60 degrees with the plane where the third fiber web layer is located.

[0014] The first fiber web layer and the third fiber web layer are both mixed fiber web layers, and both include the following weight percentages of fibers: 40%-45% viscose fiber, 20%-25% wood pulp fiber, 20%-25% lyocell fiber, and 5%-20% chitosan fiber; among them, the viscose fiber includes 20%-50% of the weight percentage of special-shaped viscose fiber. Wood pulp fiber is natural cellulose fiber, and viscose fiber, lyocell fiber, and viscose fiber filament are regenerated cellulose fibers, which can be naturally degraded. Chitosan fiber is the product of removing part of the acetyl group from the natural polysaccharide chitin, which is formed by wet spinning and has multiple functions such as biodegradability, biocompatibility, non-toxicity, and antibacterial. In addition, the surface of chitosan fiber has a fine pore structure, and its microporous structure plays a role in saving energy consumption in the subsequent drying process and increases the liquid storage capacity in the infiltration process. The cross-sectional shape of the shaped viscose fiber is flat, which has a larger surface area than the round fiber, and can enhance the cohesion between the fibers, thereby improving the entanglement ability between the fibers and reducing the amount of hair loss in the product; at the same time, due to the addition of shaped fibers, the gaps on the surface of the composite material are increased, which can save energy in the subsequent drying process and increase the liquid absorption during the wetting process.

[0015] The shaped viscose fiber is a curled shaped viscose fiber with a plurality of curl structures. The thermoplasticity of the viscose fiber is utilized. The fiber is stretched during forming. The fiber is treated with hot air and hot water. Uneven internal stress exists inside the fiber. When the internal stress is relaxed, the fiber shrinks and curls. Each 25 mm fiber is treated to have 15-20 curls, thereby increasing the curl of the shaped viscose fiber. The curling treatment of the shaped viscose fiber increases the degree of entanglement between the fibers, which can further reduce and avoid the hair loss of the product, improve the product quality and user experience, and reduce customer complaints about hair loss.

[0016] A method for preparing a fast liquid-absorbing composite nonwoven fabric with a directional arrangement structure comprises the following steps: S1, preparing the first fiber web layer and the third fiber web layer: adding wood pulp fibers into water with additives added thereto so that the mass percentage of wood pulp fibers in the wood pulp fiber suspension is 5%-10%, and mixing them evenly to obtain wood pulp fiber slurry, conveying the wood pulp fiber slurry to a grinding disc machine for refining and refining until the wood pulp fibers produce a brooming reaction, and then evenly mixing the refined wood pulp fiber slurry with viscose fibers, lyocell fibers, and chitosan fibers in a pulp mixing tank, and passing the evenly mixed slurry through an inclined mesh former to form a composite fiber web, and the formed composite fiber web is reinforced through a spunlace process, and some spunlace heads increase the spunlace pressure by 10-20 bar, and usually the spunlace heads at the 2nd, 4th, and 6th intervals in each row increase the spunlace pressure by 10-20 bar, so as to prepare the first guide holes and the second guide holes on the first fiber web layer and the third fiber web layer, and then embossing the composite fiber web to prepare protrusions and grooves on the first fiber web layer and the third fiber web layer.

[0017] S2, preparing the second fiber web layer: using viscose fiber filaments to form a mesh fabric on a warp knitting and weft weaving textile machine; or using 10-15 viscose fiber filaments to twist into viscose fiber filament yarns, and forming the viscose fiber filament yarns into a mesh fabric on a warp knitting and weft weaving textile machine.

[0018] S3, laying the third fiber mesh layer on the supporting net curtain, starting to lay the second fiber mesh layer at a distance of 1.4-1.6 meters between the end of the second fiber mesh layer and the end of the third fiber mesh layer, and then laying the first mixed fiber mesh layer at a distance of 1.4-1.6 meters, and after the three-layer composite fiber mesh layer is hydroentangled and reinforced by a hydroentanglement machine, hot air drying is performed, and the finished product is wound into a roll; Among them, steps S1 and S2 can be performed in any order and can also be performed simultaneously.

[0019] The liquid absorption speed of the composite nonwoven fabric of the present invention can be reduced by 1-3 seconds and the drying time can be reduced by 2-5 seconds compared with conventional nonwoven fabrics, which effectively improves the liquid absorption and wetting speed of the composite nonwoven fabric and shortens the drying time, thus saving energy and improving production efficiency, thereby effectively reducing production costs. In addition, the good liquid absorption and wetting performance effectively ensures the wetting sufficiency of the wet wipe white sheets, so that the wet wipe white sheet stack remains stable during the slicing process, reducing and avoiding the occurrence of shutdown accidents caused by scattering, thereby ensuring the stability of production.

[0020] The composite nonwoven fabric of the present invention has high tensile strength and is not easy to break or shed, thereby improving product quality and user experience, reducing customer complaints about lint, and is worthy of wide promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the side structure of the composite spunlace nonwoven fabric in the embodiment of the present application; Figure 2 This is a schematic diagram of the top surface structure of the composite spunlace nonwoven fabric in an embodiment of the present application; Figure 3 This is a schematic diagram of the bottom surface structure of the composite spunlace nonwoven fabric in the embodiment of the present application; Figure 4 This is a schematic diagram of the structure of the second web layer of the composite spunlace nonwoven fabric in an embodiment of the present application; Figure 5 This is a process flow chart for preparing the first and third fiber web layers in the embodiment of the present application; Figure 6 This is a process flow chart for preparing the second web layer in the embodiment of the present application; Figure 7 This is a flow chart of the composite process of the composite nonwoven fabric in the embodiment of the present application. DETAILED DESCRIPTION

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

[0023] See also Figure 1-4A composite spunlace nonwoven fabric with a directional arrangement structure comprises, from top to bottom, a first fiber mesh layer 1, a second fiber mesh layer 2 and a third fiber mesh layer 3; the first fiber mesh layer 1 and the third fiber mesh layer 3 are both formed by entanglement and interweaving of their fiber materials, the second fiber mesh layer 2 is a yarn mesh structure of viscose fiber long fiber warp knitting and weft weaving, as the "skeleton and meridians" of the three-layer composite fabric, the first fiber mesh layer 1 is provided with a plurality of first protrusions 1-1, and at least one first guide hole 1-2 penetrating the fiber mesh layer is provided in the area enclosed by the plurality of first protrusions 1-1; at least a portion of the fibers 1-4 of the first fiber layer 1 extend toward the second fiber layer 2 and extend into the second fiber layer 2, and at least a portion of the fibers of the second fiber layer 2 extend toward the third fiber layer 3 and extend into the third fiber layer. By sandwiching the second fiber mesh layer 2 of the yarn mesh structure composed of viscose fiber long fibers warp knitting and weft weaving between the first fiber mesh layer 1 and the third fiber mesh layer 3 formed by fiber entanglement and interweaving, the second fiber mesh layer 2 serves as the "skeleton and meridians" of the three-layer composite fabric, which can provide the composite non-woven fabric with higher tensile strength, improve the isotropy of the fabric, reduce the elongation at break, and also play the role of guiding meridians during liquid infiltration, quickly wetting the entire fabric. The aperture 201 of the mesh structure of the second fiber mesh layer 2 is preferably 5mm-10mm, and it is preferred to use wire bundles to weave into a mesh structure, which has better skeleton and drainage effects. At the same time, the fibers extending from the first fiber layer 1 to the second fiber layer 2 and extending from the second fiber layer 2 to the third fiber layer 3 form a directional arrangement structure, which plays a role in combining fibers, making the composite connection between fiber layers tight, and at the same time, plays a role in guiding liquid infiltration, especially at the first guide hole 1-2, the first guide hole 1- can be formed by pressurized water spunlace, which can quickly absorb liquid and effectively improve the liquid absorption and wetting speed of the composite nonwoven fabric. The directional fibers and guide holes can also improve the penetration rate and heat transfer efficiency of the hot air flow during the drying process, shorten the drying time, and save energy. The production efficiency is improved from the liquid absorption and drying process, thereby reducing the production cost.

[0024] The first protrusion 1-1 is a pearl-shaped protrusion obtained by mechanical embossing, and the diameter of the protrusion is preferably 5mm-7mm, which not only effectively increases the contact area of ​​the single point of the protrusion, but also ensures the soft feeling of human skin when it contacts the wet wipes. Through the design of the protrusion, the ability to store dirt and dirt can be improved, the wiping effect can be improved, and in combination with the guide hole and the combining fiber, especially when used as a dry wipe, the dirt can be quickly introduced into the interior of the composite non-woven fabric.

[0025] The viscose fiber filaments used for weaving the second fiber layer 2 are preferably a certain number of viscose fiber filaments twisted into viscose fiber filament yarns, and the viscose fiber filament yarns are formed into a mesh fabric on a warp knitting and weft weaving textile machine. Viscose fiber is a regenerated cellulose fiber, and the length of the viscose fiber can be freely controlled to form viscose fiber filaments. By twisting a number of viscose fiber filaments into viscose fiber filament yarns, the fiber strength and tensile strength of the composite nonwoven fabric are greatly improved, and the efficiency of liquid impregnation is also improved, and the impregnation time is shortened.

[0026] As a further preferred solution, the third fiber mesh layer 3 is evenly provided with a plurality of second protrusions 3-1, and at least one second guide hole 3-2 penetrating the fiber mesh layer is provided in the area enclosed by the plurality of second protrusions 3-1, and the second guide hole 3-2 has a certain inclination, and forms an angle of 60 degrees with the plane where the third fiber mesh layer 3 is located, and at least a portion of the fibers 3-4 of the third fiber layer 3 extend toward the second fiber layer 2 and extend into the second fiber layer 2, and at least a portion of the fibers of the second fiber layer 2 extend toward the first fiber layer 1 and extend into the first fiber layer 1. The bidirectional rapid liquid absorption of the composite nonwoven fabric is achieved, and the liquid absorption and wetting speed and drying efficiency of the nonwoven fabric are further improved, the production efficiency is improved, and the production cost is reduced.

[0027] At least a portion of the fibers 1-4 of the first fiber layer 1 extends to the third fiber layer 3. At least a portion of the fibers 3-4 of the third fiber layer 3 extends to the first fiber layer 1. The composite connection and fastening effect between the fiber layers can be further improved.

[0028] The first fiber mesh layer 1 is provided with a first groove 1-3, and the third fiber mesh layer 3 is provided with a second groove 3-3, and the directions of the first groove 1-3 and the second groove 3-3 are perpendicular to each other. The depth of the first groove 1-3 and the second groove 3-3 is preferably 0.5mm-1mm. The depth of the first groove 1-3 and the second groove 3-3 is less than or equal to 1 / 2 of the thickness of the protrusion 1-1 or 3-1, which can effectively increase the contact area and reduce the influence of the liquid surface tension on the absorption speed through the height difference. Through the design of the first groove 1-3 and the second groove 3-3, the first groove 1-3 and the second groove 3-3 are criss-crossed, which is conducive to the rapid wetting of the composite non-woven fabric, increases the friction area, and improves the wiping effect. The grooves also increase the penetration rate and heat transfer efficiency of the high-speed hot air flow during the drying process, shorten the drying time, save energy, improve production efficiency, and reduce production costs. Combined with fiber At least a portion of the guide holes 1-2 of the first fiber layer 1 is connected to the first groove 1-3. At least a portion of the guide holes 3-2 of the third fiber layer 3 is connected to the second groove 3-3. Through the connection and coordination of the guide holes and the grooves, the liquid absorption and wetting speed and drying efficiency of the composite nonwoven fabric are further improved, the production efficiency is improved, and the production cost is reduced.

[0029] The first fiber web layer 1 and the third fiber web layer 3 are both mixed fiber web layers, and both include the following weight percentages of fibers: 40%-45% viscose fiber, 20%-25% wood pulp fiber, 20%-25% lyocell fiber, and 5%-20% chitosan fiber; wherein the viscose fiber includes 20%-50% of the weight percentage of special-shaped viscose fiber. Wood pulp fiber is natural cellulose fiber, and viscose fiber, lyocell fiber, and viscose fiber filament are regenerated cellulose fibers, which can be naturally degraded. Chitosan fiber is the product of the natural polysaccharide chitin with some acetyl groups removed, which is formed by wet spinning. It has multiple functions such as biodegradability, biocompatibility, non-toxicity, and antibacterial properties. In addition, the surface of chitin fiber has a fine pore structure, and its microporous structure plays a role in saving energy consumption in the subsequent drying process and increases the liquid storage capacity in the impregnation process. The cross-sectional shape of the shaped viscose fiber is flat, which has a larger surface area than the round fiber, and can enhance the cohesion between the fibers, thereby improving the entanglement ability between the fibers and reducing the amount of hair loss in the product; at the same time, due to the addition of shaped fibers, the gaps on the surface of the composite material are increased, which can save energy in the subsequent drying process and increase the liquid absorption during the wetting process.

[0030] The shaped viscose fiber is a curled shaped viscose fiber with a plurality of curl structures. The thermoplasticity of the viscose fiber is utilized. The fiber is stretched during forming. The fiber is treated with hot air and hot water. Uneven internal stress exists inside the fiber. When the internal stress is relaxed, the fiber shrinks and curls. Each 25 mm fiber is treated to have 15-20 curls, thereby increasing the curl of the shaped viscose fiber. The curling treatment of the shaped viscose fiber increases the degree of entanglement between the fibers, which can further reduce and avoid the hair loss of the product, improve the product quality and user experience, and reduce customer complaints about hair loss.

[0031] See also Figure 5-7 A method for preparing a fast liquid-absorbing composite nonwoven fabric with a directional arrangement structure comprises the following steps: S1, preparing the first fiber web layer 1 and the third fiber web layer 3: adding wood pulp fiber to water with additives added, so that the mass percentage of wood pulp fiber in the wood pulp fiber suspension is 5%-10%, mixing evenly to obtain wood pulp fiber slurry, conveying the wood pulp fiber slurry to a grinding disc machine for refining, refining until the wood pulp fiber produces a brooming reaction, and then mixing the refined wood pulp fiber slurry with viscose fiber, lyocell fiber, and chitosan fiber in a pulping tank, and passing the mixed slurry through an inclined screen. The composite fiber web is formed by a molder, and the composite fiber web is reinforced by a spunlacing process, and some spunlacing heads increase the spunlacing pressure by 10-20 bar, and usually the spunlacing heads at the 2nd, 4th, and 6th intervals in each row increase the spunlacing pressure by 10-20 bar to prepare the first guide holes 1-2 and the second guide holes 3-2 on the first fiber web layer 1 and the third fiber web layer 3, and then the composite fiber web is embossed to prepare the protrusions 1-1, 3-1 and the grooves 1-3, 3-3 on the first fiber web layer 1 and the third fiber web layer 3; S2, preparing the second fiber mesh layer 2: using viscose fiber filaments to form a mesh fabric on a warp knitting and weft weaving textile machine; or, using 10-15 viscose fiber filaments to twist into viscose fiber filament yarns, and the viscose fiber filament yarns to form a mesh fabric on a warp knitting and weft weaving textile machine. When the viscose fiber filaments are twisted into viscose fiber filament yarns, it is preferred to use viscose fiber filaments of a certain length, and after twisting, viscose hairiness with free ends is formed on the viscose fiber filament yarns, so as to increase the number of bonding fibers between the second fiber mesh layer 2 and the first fiber mesh layer 1 and the third fiber mesh layer 3, so as to make their composite connection more firm.

[0032] Steps S1 and S2 can be performed in any order and can also be performed simultaneously.

[0033] S3, composite: lay the third fiber mesh layer 3 on the supporting mesh curtain, with the end of the second fiber mesh layer 2 and the end of the third fiber mesh layer 3 1.4-1.6 meters apart, start laying the second fiber mesh layer 2, and then lay the first mixed fiber mesh layer 1 at a distance of 1.4-1.6 meters. After the three-layer composite fiber mesh layer is reinforced by hydroentanglement machine, hot air drying is carried out, and it is rolled into a roll to obtain the finished product.

[0034] The liquid absorption speed of the composite nonwoven fabric of the present invention can be reduced by 1-3 seconds and the drying time can be reduced by 2-5 seconds compared with conventional nonwoven fabrics, which effectively shortens the liquid absorption and drying time, saves energy, improves production efficiency, reduces production costs, and improves the competitiveness of enterprise products.

[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A composite nonwoven fabric with a directional arrangement structure, comprising, from top to bottom, a first fiber web layer, a second fiber web layer and a third fiber web layer; characterized in that: The first fiber web layer and the third fiber web layer are both formed by entanglement and interweaving of their fibers, and the second fiber web layer is a yarn mesh structure of viscose fiber long fiber warp knitting and weft weaving, serving as the "skeleton and meridian" of the three-layer composite fabric; The first fiber web layer is provided with a plurality of first protrusions, and at least one first guide hole penetrating the fiber web layer is provided in the area enclosed by the plurality of first protrusions; At least a portion of the fibers of the first fiber layer extend toward the second fiber layer and extend into the second fiber layer, and at least a portion of the fibers of the second fiber layer extend toward the third fiber layer and extend into the third fiber layer.

2. The composite nonwoven fabric according to claim 1, characterized in that: Viscose filament yarn is made by twisting a certain amount of viscose filament into viscose filament yarn, and the viscose filament yarn is formed into a mesh fabric on a warp knitting and weft weaving textile machine.

3. The composite nonwoven fabric according to claim 1 or 2, characterized in that: The mesh size of the second fiber mesh layer yarn mesh structure is preferably 5mm-10mm.

4. The composite nonwoven fabric according to claim 1, characterized in that: The third fiber mesh layer is evenly distributed with a plurality of second protrusions, and at least one second guide hole penetrating the fiber mesh layer is arranged in the area enclosed by the plurality of second protrusions. At least a portion of the fibers of the third fiber layer extend toward the second fiber layer and into the second fiber layer, and at least a portion of the fibers of the second fiber layer extend toward the first fiber layer and into the first fiber layer.

5. The composite nonwoven fabric according to claim 4, characterized in that: The first fiber web layer is provided with a first groove, and the third fiber web layer is provided with a second groove, and the directions of the first groove and the second groove are perpendicular to each other.

6. The composite nonwoven fabric according to claim 5, characterized in that: At least a portion of the first guide holes of the first fiber layer are in communication with the first groove, and / or at least a portion of the second guide holes of the third fiber layer are in communication with the second groove.

7. The composite nonwoven fabric according to claim 1, characterized in that: The first fiber web layer and the third fiber web layer are both mixed fiber web layers, and both include the following weight percentages of fibers: viscose fiber 40%-45%, wood pulp fiber 20%-25%, lyocell fiber 20%-25%, chitosan fiber 5%-20%; wherein the viscose fiber includes 20%-50% by weight of shaped viscose fiber.

8. The composite nonwoven fabric according to claim 7, characterized in that: The shaped viscose fiber is a curled shaped viscose fiber having a plurality of curling structures.

9. A method for preparing a fast liquid-absorbing composite nonwoven fabric with a directional arrangement structure, characterized in that: The following steps are involved: S1, preparing the first fiber web layer and the third fiber web layer: adding wood pulp fibers into water with additives added thereto so that the mass percentage of the wood pulp fibers in the wood pulp fiber suspension is 5%-10%, and mixing them evenly to obtain wood pulp fiber slurry, conveying the wood pulp fiber slurry to a grinding disc machine for refining and refining until the wood pulp fibers produce a brooming reaction, and then evenly mixing the refined wood pulp fiber slurry with viscose fibers, lyocell fibers, and chitosan fibers in a pulp preparation tank, and the evenly mixed slurry is passed through an inclined mesh former to form a composite fiber web, and the formed composite fiber web is reinforced through a spunlace process, and some spunlace heads increase the spunlace pressure by 10-20 bar to prepare first guide holes and second guide holes on the first fiber web layer and the third fiber web layer, and then embossing the composite fiber web to prepare protrusions and grooves on the first fiber web layer and the third fiber web layer; S2, preparing the second fiber web layer: using viscose fiber filaments to form a mesh fabric on a warp knitting and weft weaving textile machine; S3, laying the third fiber mesh layer on the supporting net curtain, starting to lay the second fiber mesh layer at a distance of 1.4-1.6 meters between the end of the second fiber mesh layer and the end of the third fiber mesh layer, and then laying the first mixed fiber mesh layer at a distance of 1.4-1.6 meters, and after the three-layer composite fiber mesh layer is hydroentangled and reinforced by a hydroentanglement machine, hot air drying is performed, and the finished product is wound into a roll; Among them, steps S1 and S2 can be performed in any order and can also be performed simultaneously.

10. The preparation method according to claim 9, characterized in that: S2, preparing the second fiber web layer: twisting 10-15 viscose fiber filaments into viscose fiber filament yarns, and forming the viscose fiber filament yarns into a mesh fabric on a warp knitting and weft weaving textile machine.

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