Device and method for preparing composite non-woven fabric and composite non-woven fabric

Abstract

The invention provides a composite non-woven fabric preparation device and method and a composite non-woven fabric, and relates to the technical field of non-woven fabric preparation. The die head is connected with the extruder, a first cavity and a second cavity are formed in the die head, the upper end and the lower end of the first cavity are open, the lower end of the second cavity is open, and the upper end of the second cavity is communicated with a discharge port of the extruder; the filament supply mechanism is arranged on one side of the die head and used for inputting fiber tows into the first cavity; the static electricity generating part and the negative pressure generating part are arranged below the die head and used for promoting the fiber tows output from the first cavity to be dispersed into first fiber filaments, promoting the melt output from the second cavity to form second fiber filaments and enabling the first fiber filaments and the second fiber filaments to be compounded to form the composite non-woven fabric; the electrostatic spinning technology and the melt-blowing technology are combined, no auxiliary solvent needs to be used in the preparation process, and the production efficiency is high.

Description

Technical Field

[0001] This invention belongs to the field of nonwoven fabric preparation technology, and more specifically, relates to an apparatus, method and composite nonwoven fabric preparation device. Background Technology

[0002] High-strength breathable membrane materials possess excellent properties such as waterproofness, breathability, toughness, tear resistance, lightweight, puncture resistance, and low dust content. Due to their superior protective performance, they are widely used in medical protective equipment (medical packaging, protective clothing, surgical gowns, etc.) and civilian applications (clothing, construction, etc.). my country has a large demand for high-strength breathable membrane products, but the industry's development has been slow due to the monopoly of foreign technology and patents.

[0003] DuPont's flash spinning process is a primary method for preparing high-strength, breathable fiber membranes. It produces isotropic fibers of 0.5-10 μm from high-density polyethylene, featuring ultra-high spinning speeds and requiring less solvent than dry and wet processes. This results in advantages such as high strength and lightweight. However, flash spinning of nonwoven fabrics requires the use of large amounts of toxic and environmentally polluting organic solvents, such as toluene, dichloromethane, and chloroform, posing a certain degree of environmental harm.

[0004] Electrospinning is also an effective method for preparing high-performance nanofiber membranes. However, polyolefin materials, especially polyethylene, have poor solubility and conductivity, and need to be dissolved at temperatures higher than the ambient temperature and non-polar solvents. Therefore, electrospinning polyethylene is very difficult. Solution electrospinning, like flash evaporation, requires a large amount of organic solvent and has low production efficiency, making it difficult to industrialize.

[0005] Furthermore, meltblown technology is suitable for large-scale industrial production of nanofiber nonwoven fabrics. The production process requires no solvents, boasts high productivity, and has excellent commercial potential. Typically, meltblown fibers have an average diameter of 1-10 μm, endowing the material with superior properties such as large specific surface area, small pore size, high porosity, and high barrier properties. These properties make it widely used in medical and hygiene packaging, thermal insulation, clothing lining, and filtration. The application characteristics exhibited by ultrafine fibers in meltblown nonwoven fabrics are unmatched by products produced using other single nonwoven technologies. Summary of the Invention

[0006] The purpose of this invention is to provide a device, method, and composite nonwoven fabric for preparation, which combines electrospinning technology with meltblown process. The preparation process does not require the use of auxiliary solvents, and has high production efficiency, making it suitable for industrial production.

[0007] To achieve the above objectives, the present invention provides an apparatus for preparing composite nonwoven fabrics, the apparatus comprising:

[0008] An extruder, wherein the feed inlet of the extruder is used to input polymer;

[0009] The die head is connected to the extruder. The die head has a first chamber and a second chamber inside. The upper and lower ends of the first chamber are open, the lower end of the second chamber is open, and the upper end of the second chamber is connected to the discharge port of the extruder.

[0010] A fiber feeding mechanism is disposed on one side of the die head and is used to feed fiber bundles into the first chamber;

[0011] An electrostatic generating component and a negative pressure generating component are disposed below the die head and are used to cause the fiber bundle output from the first chamber to disperse into a first fiber filament, cause the melt output from the second chamber to form a second fiber filament, and cause the first fiber filament and the second fiber filament to combine to form a composite nonwoven fabric.

[0012] Optionally, there are two second chambers, which are respectively located on both sides of the first chamber.

[0013] Optionally, a heat-insulating sleeve is provided inside the mold head, and the wall of the heat-insulating sleeve forms the chamber wall of the first chamber.

[0014] Optionally, a winding mechanism is provided below the electrostatic generating component and the negative pressure generating component. The winding mechanism includes a winding roller for winding the composite nonwoven fabric.

[0015] Optionally, a conveying mechanism is provided above the take-up roller, the conveying mechanism including a conveyor belt for conveying the composite nonwoven fabric.

[0016] Optionally, the mold head includes a first plate, a second plate, a third plate, and a fourth plate that are stacked in sequence, with a second chamber formed between the first plate and the second plate, a first chamber formed between the second plate and the third plate, and another second chamber formed between the third plate and the fourth plate.

[0017] Optionally, one end of the die head is provided with a connecting component, and the connecting component is provided with two connecting channels. The connecting component is connected to the extruder. A guide channel is formed at the upper end of the two second chambers between the first plate and the second plate and between the third plate and the fourth plate. One end of the two guide channels is connected to the two second chambers respectively, and the other end of the two guide channels is connected to the two connecting channels respectively.

[0018] Optionally, the yarn feeding mechanism includes a guide roller, a guide rod, and a yarn separating disc, wherein the guide rod is connected to the yarn separating disc, and the yarn separating disc is located above the die head.

[0019] Optionally, it also includes a hot pressing mechanism, which is disposed on one side of the winding mechanism and is used to hot press the composite nonwoven fabric wound by the winding mechanism.

[0020] The present invention also provides a method for preparing a composite nonwoven fabric, utilizing the above-mentioned composite nonwoven fabric preparation apparatus, the method comprising:

[0021] Preheat the extruder and die;

[0022] Add the polymer into the extruder;

[0023] A fiber bundle is fed into the first chamber using a fiber feeding mechanism;

[0024] The electrostatic generator and the negative pressure generator are activated to disperse the fiber bundles output from the first chamber into first fiber filaments and to form second fiber filaments from the melt output from the second chamber, thereby combining the first fiber filaments and the second fiber filaments to form a composite nonwoven fabric.

[0025] Optionally, it further includes: collecting the composite nonwoven fabric formed by combining the first fiber filament and the second fiber filament.

[0026] Optionally, it also includes: hot pressing the collected composite nonwoven fabric.

[0027] Optionally, the preheating temperature of the extruder is 50℃~300℃.

[0028] Optionally, the polymer is low-density polyethylene, or a mixture of at least two types of low-density polyethylene, or a mixture of low-density polyethylene and high-density polyethylene with a melt index ≥10g / 10min; the fiber bundle is a high molecular weight polyethylene fiber bundle or a fiber bundle made of high-density polyethylene.

[0029] The present invention also provides composite nonwoven fabric prepared by the above-mentioned method for preparing composite nonwoven fabric.

[0030] This invention provides an apparatus, method, and composite nonwoven fabric preparation method. The advantages are as follows: the apparatus has a first chamber and a second chamber inside its die head. Molten polymer and fiber bundles are fed into the first chamber and second chamber respectively via an extruder and a fiber feeding mechanism. Under the action of an electrostatic generating component and a negative pressure generating component, the fiber bundles output from the first chamber are dispersed into first filaments, and the melt output from the second chamber forms second filaments. The first and second filaments are then combined to form a composite nonwoven fabric. This apparatus produces composite nonwoven fabric without the need for auxiliary solvents, making the process green and environmentally friendly, free from pollution and hazards. Furthermore, the composite nonwoven fabric is produced in one step, with a reasonable die head structure, simple operation, and suitability for industrial production.

[0031] Furthermore, the preparation method of this composite nonwoven fabric is environmentally friendly, simple in process, and highly efficient in production.

[0032] Furthermore, the composite nonwoven fabric prepared by this method has continuous, long first fiber filaments and is mixed with second fiber filaments formed by polymers. The composite nonwoven fabric has high strength and low porosity.

[0033] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0034] The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of exemplary embodiments of the invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the invention.

[0035] Figure 1 A schematic diagram of a composite nonwoven fabric preparation apparatus according to Embodiment 1 of the present invention is shown.

[0036] Figure 2 It shows Figure 1 A top-view structural diagram.

[0037] Figure 3 A front view schematic diagram of the die head of a composite nonwoven fabric preparation apparatus according to Embodiment 1 of the present invention is shown.

[0038] Figure 4 A side view of the die head of a composite nonwoven fabric preparation apparatus according to Embodiment 1 of the present invention is shown.

[0039] Figure 5 A top view of the die head of a composite nonwoven fabric preparation apparatus according to Embodiment 1 of the present invention is shown.

[0040] Figure 6 A cross-sectional view of the die head of a composite nonwoven fabric preparation apparatus according to Embodiment 1 of the present invention is shown.

[0041] Figure 7 A cross-sectional view of the die head of a composite nonwoven fabric preparation apparatus according to Embodiment 1 of the present invention is shown.

[0042] Figure 8 A cross-sectional view of the die head of a composite nonwoven fabric preparation apparatus according to Embodiment 1 of the present invention is shown from a third perspective.

[0043] Figure 9 A flowchart of a method for preparing a composite nonwoven fabric according to Embodiment 2 of the present invention is shown.

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Electric motor; 2. Control box; 3. Barrel; 4. Extruder; 5. Fan; 6. Fiber bundle; 7. Splitting disc; 8. Die head; 9. Hollow electrode plate; 10. Guide rod; 11. Guide roller; 12. Negative pressure suction box; 13. Composite nonwoven fabric; 14. Conveyor belt; 15. Take-up roller; 16. Connecting components; 17. First plate; 18. Second plate; 19. Heat insulation sleeve; 20. Guide hole; 21. Third plate; 22. Fourth plate; 23. Melt jet. Detailed Implementation

[0046] Preferred embodiments of the invention will now be described in more detail. While preferred embodiments of the invention are described below, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0047] Example 1

[0048] like Figure 1 and Figure 2 As shown, the present invention provides an apparatus for preparing composite nonwoven fabric, the apparatus comprising:

[0049] Extruder 4, the feed port of extruder 4 is used to input polymer;

[0050] The die head 8 is connected to the extruder 4. The die head 8 has a first chamber and a second chamber inside. The upper and lower ends of the first chamber are open, the lower end of the second chamber is open, and the upper end of the second chamber is connected to the discharge port of the extruder 4.

[0051] A fiber feeding mechanism is located on one side of the die head 8 and is used to feed fiber bundles 6 into the first chamber.

[0052] The electrostatic generating component and the negative pressure generating component are located below the die head 8 and are used to cause the fiber bundle 6 output from the first chamber to disperse into first fiber filaments, cause the melt output from the second chamber to form second fiber filaments, and cause the first fiber filaments and the second fiber filaments to combine to form a composite nonwoven fabric 13.

[0053] Specifically, the die head 8 of the composite nonwoven fabric preparation device is provided with a first chamber and a second chamber. Molten polymer and fiber bundles 6 can be fed into the second chamber and the first chamber respectively through the extruder 4 and the fiber feeding mechanism. Under the action of the electrostatic generating component and the negative pressure generating component, the fiber bundles 6 output from the first chamber are dispersed into first fibers, and the melt output from the second chamber is formed into second fibers. The first fibers and the second fibers are then combined to form a composite nonwoven fabric 13. When producing composite nonwoven fabric 13, the composite nonwoven fabric preparation device does not require the use of auxiliary solvents. The preparation process is green and environmentally friendly, without pollution or harm. Furthermore, the composite nonwoven fabric preparation process is completed in one step. The die head 8 has a reasonable structure, is easy to operate, and is suitable for industrial production.

[0054] In this embodiment, the extruder 4 is a single-screw extruder 4, which is mounted on the control box 2. One end of the extruder 4 is connected to the motor 1, the extruder 4 barrel 3 forms the feed inlet, and a fan 5 is connected to one side of the extruder 4.

[0055] In this embodiment, the polymer is low-density polyethylene (LDPE), and the fiber bundle 6 is a high molecular weight polyethylene fiber bundle 6 or a fiber bundle 6 made of high-density polyethylene material, that is, a high-strength fiber bundle 6.

[0056] In this process, the die head 8 is connected to the single screw extruder 4. At the end of the die head 8, the LDPE melt is drawn out as a jet by high voltage electrostatic action. The jet solidifies into fibers, namely the second fiber filaments, and wraps around the ultra-long fiber filaments that are drawn from it, namely the first fiber filaments. The high-strength fiber bundle 6 breaks open under the action of the electric field. After being affected by the wind field below the die head 8, it will entangle and swing, enhancing the composite effect of the first fiber filaments and the second fiber filaments.

[0057] In this embodiment, there are two second chambers, which are respectively located on both sides of the first chamber.

[0058] Specifically, a second chamber is provided on each side of the first chamber. The second fiber filaments formed by jetting and solidifying in the two second chambers are distributed on both sides of the first fiber filament. Under the action of the air field below the mold head 8, the second fiber filament and the first fiber filament will entangle and swing, further enhancing the composite effect of the first fiber filament and the second fiber filament.

[0059] In this embodiment, a heat insulation sleeve 19 is provided inside the mold head 8, and the wall of the heat insulation sleeve 19 forms the chamber wall of the first chamber.

[0060] Specifically, the heat insulation sleeve 19 can be made of glass wool or rock wool to insulate the high temperature of the mold head 8.

[0061] In this embodiment, a guide wire hole 20 is formed inside the heat insulation sleeve 19, and a guide wire traction device is embedded therein to pull the external high-strength fiber bundle 6.

[0062] In this embodiment, a winding mechanism is provided below the static electricity generating component and the negative pressure generating component. The winding mechanism includes a winding roller 15, which is used to wind up the composite nonwoven fabric 13.

[0063] Specifically, the take-up roller 15 is an active roller, which winds the composite nonwoven fabric 13 by rotating the take-up roller 15.

[0064] In this embodiment, a conveying mechanism is provided above the take-up roller 15. The conveying mechanism includes a conveyor belt 14, which is used to transport the composite nonwoven fabric 13.

[0065] Specifically, after the composite nonwoven fabric 13 is formed, it is received by the lower laying belt after being stretched by the wind field and electric field, and then wound up by the winding roller 15.

[0066] In this embodiment, the mold head 8 includes a first plate 17, a second plate 18, a third plate 21 and a fourth plate 22 that are stacked in sequence. A second chamber is formed between the first plate 17 and the second plate 18, a first chamber is formed between the second plate 18 and the third plate 21, and another second chamber is formed between the third plate 21 and the fourth plate 22.

[0067] Specifically, such as Figures 3-8 As shown, the first plate 17, the second plate 18, the third plate 21 and the fourth plate 22 can be connected in a stacked manner by bolts. The surfaces of the first plate 17 and the second plate 18 that are close to each other are provided with first grooves, and the two first grooves are connected to form a second chamber. The surfaces of the second plate 18 and the third plate 21 that are close to each other are provided with second grooves, and the two second grooves are connected to form a first chamber. The surfaces of the third plate 21 and the fourth plate 22 that are close to each other are provided with third grooves, and the two third grooves are connected to form another second chamber.

[0068] In this embodiment, a connecting component 16 is provided at one end of the die head 8. The connecting component 16 has two connecting channels inside. The connecting component 16 is connected to the extruder 4. A guide channel is formed at the upper end of the two second chambers between the first plate 17 and the second plate 18 and between the third plate 21 and the fourth plate 22. One end of the two guide channels is connected to the two second chambers respectively, and the other end of the two guide channels is connected to the two connecting channels respectively.

[0069] Specifically, the connecting component 16 at one end of the die head 8 connects the die head 8 to the output end of the extruder 4. The two connecting channels in the connecting component 16 are connected to the output channel of the extruder 4, which can deliver molten polymer into the two guide channels, thereby allowing the molten polymer to enter the two second chambers.

[0070] In this embodiment, as Figure 6 As shown, the lower ends of the two guide channels are respectively connected to two branch channels. The branch channels play a role in distributing the molten polymer, so that the molten polymer is evenly distributed along the length of the second chamber.

[0071] In this embodiment, as Figure 8 As shown, the width of the second chamber is smaller than the width of the guide channel, and a jet channel is provided at the lower end of the second chamber, the width of which is smaller than the width of the second chamber.

[0072] In this embodiment, the wire feeding mechanism includes a wire guide roller 11, a wire guide rod 10, and a wire separating disc 7. The wire guide rod 10 is connected to the wire separating disc 7, and the wire separating disc 7 is located above the die head 8.

[0073] Specifically, the fiber bundle 6 is guided by the guide roller 11, and then conveyed and separated by the guide rod 10 and the splitting disc 7 located above the die head 8, so that the fiber bundle 6 can be arranged in the length direction of the first chamber and enter the first chamber. The fiber bundle 6 passes through the first chamber from top to bottom and is continuously transported.

[0074] In this embodiment, a hot pressing mechanism is also included. The hot pressing mechanism is disposed on one side of the winding mechanism and is used to hot press the composite nonwoven fabric 13 wound by the winding mechanism.

[0075] Specifically, after the composite nonwoven fabric 13 formed by the first fiber filament and the second fiber filament is wound by the winding mechanism, the composite nonwoven fabric 13 is hot-pressed by the hot-pressing mechanism to form a composite nonwoven fabric 13 with better performance, which can be called a high-strength breathable membrane.

[0076] In this embodiment, a traction roller is also included, which is used to pull the composite nonwoven fabric 13 on the take-up roller 15 and convey it to the hot pressing mechanism.

[0077] In this embodiment, the electrostatic generating component includes a hollow electrode plate 9, the hollow portion of which is disposed at the output position at the lower end of the mold head 8; the negative pressure generating component is a negative pressure suction box 12.

[0078] In summary, when using the composite nonwoven fabric preparation apparatus provided by this invention, taking the preparation of a high-strength breathable membrane as an example: First, the extruder 4 and the die 8 are heated. After the extruder 4 and the die 8 reach the predetermined temperature, they are kept at that temperature for 1 hour. Polyethylene with good flowability, such as low-density polyethylene granules, is added to the feed inlet. The low-density polyethylene is melted and plasticized by the single-screw extruder 4 and then enters the die 8. Then, the electrostatic generating component and the negative pressure generating component are turned on to cause the fiber bundle 6 output from the first chamber to disperse into first fiber filaments, and to cause the melt output from the second chamber to form second fiber filaments. The second fiber filaments are stretched into filaments at the tip of the lower end of the die 8 and intertwined with the first fiber filaments to form a composite nonwoven fabric 13. After that, the winding mechanism and the hot pressing mechanism are started. The composite nonwoven fabric 13 is collected by the web laying belt and then sent to the hot pressing mechanism by the traction roller. After being hot-pressed into a dense composite nonwoven fabric film, it is collected again.

[0079] Example 2

[0080] like Figure 9 As shown, the present invention also provides a method for preparing a composite nonwoven fabric, utilizing the aforementioned composite nonwoven fabric preparation apparatus, the method comprising:

[0081] Preheat extruder 4 and die 8;

[0082] Add polymer into extruder 4;

[0083] The fiber bundle 6 is fed into the first chamber using the fiber feeding mechanism;

[0084] The electrostatic generator and the negative pressure generator are activated to cause the fiber bundle 6 output from the first chamber to disperse into first fiber filaments, and to cause the melt output from the second chamber to form second fiber filaments, and to cause the first fiber filaments and the second fiber filaments to combine to form composite nonwoven fabric 13.

[0085] Specifically, the preparation method of this composite nonwoven fabric adopts a combination of electrospinning technology and meltblown process, which does not require the use of organic solvents and can ensure high production efficiency. In practice, the extruder 4 and the die head 8 are preheated to a set temperature. Then, the polymer is fed in so that the molten polymer enters the second chamber, and the fiber bundle 6 is fed into the first chamber by the fiber feeder. Then, the electrostatic generating component and the negative pressure generating component are used to cause the fiber bundle 6 output from the first chamber to disperse into first fiber filaments and to cause the melt output from the second chamber to form second fiber filaments. Under the action of electric field and suction wind force, the first fiber filaments and the second fiber filaments are intertwined and compounded to form composite nonwoven fabric 13.

[0086] In this embodiment, it also includes: collecting the composite nonwoven fabric 13 formed by combining the first fiber filament and the second fiber filament.

[0087] Specifically, the composite nonwoven fabric 13 can be collected using a winding mechanism with a winding roller 15.

[0088] In this embodiment, the method further includes: hot pressing the collected composite nonwoven fabric 13.

[0089] Specifically, for the composite nonwoven fabric 13 formed by the intertwining of the first and second fiber filaments, hot pressing it with a hot pressing mechanism can improve its performance and form a dense, high-strength, breathable membrane composite nonwoven fabric.

[0090] In this embodiment, the preheating temperature of the extruder 4 is 50°C to 300°C.

[0091] Specifically, after preheating, the composite nonwoven fabric can be prepared after a set time.

[0092] In this embodiment, the polymer is low-density polyethylene, and the fiber bundle 6 is a high molecular weight polyethylene fiber bundle 6 or a fiber bundle 6 made of high-density polyethylene.

[0093] In summary, when the composite nonwoven fabric preparation method provided by this invention is implemented, using the aforementioned composite nonwoven fabric preparation apparatus, taking low-density polyethylene as the polymer and high-density polyethylene fiber bundles 6 as an example: First, the extruder 4 and die 8 are preheated. When the temperature reaches the preheating temperature, low-density polyethylene is added to the barrel 3, and at the same time, the guide roller 11 storing the high-density polyethylene fiber bundles 6 is opened. The high-density polyethylene fiber bundles 6 enter the guide hole 20 of the die 8 through the guide rod 10 and the splitting disc 7; simultaneously, the low-density polyethylene enters the two secondary channels of the die 8 through the two guide channels of the die 8. Inside the two chambers, the melt is subjected to high-voltage electrostatic force generated by the electrostatic generator at the tip of the die head 8, generating a melt jet 23 and rapidly cooling and solidifying into second fiber filaments. The high-density polyethylene fiber bundle 6 in the first chamber splits at the tip of the die head 8 due to the electric field, forming dispersed first fiber filaments. The second fiber filaments on both sides of the first fiber filaments are wrapped and combined under the action of the electric field and the wind field of the negative pressure generator to form a composite nonwoven fabric 13, which is received onto the take-up roller 15 by the conveyor belt 14. Then, the composite nonwoven fabric 13 is further hot-pressed by the hot pressing mechanism to finally form a dense, high-strength, breathable membrane composite nonwoven fabric.

[0094] Example 3

[0095] The present invention also provides a composite nonwoven fabric 13 prepared by the above-mentioned method for preparing composite nonwoven fabric.

[0096] Specifically, the composite nonwoven fabric 13 prepared by this method has continuous, long first fiber filaments and is mixed with second fiber filaments formed by polymers. The composite nonwoven fabric 13 has high strength and low porosity.

[0097] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An apparatus for preparing composite nonwoven fabric, characterized in that, The device comprises: an extruder, a feeding port of which is used for inputting a polymer; a die head connected with the extruder, an inside of the die head being provided with a first chamber and a second chamber, an upper end and a lower end of the first chamber being open, a lower end of the second chamber being open, and an upper end of the second chamber being communicated with a discharging port of the extruder; a fiber supply mechanism arranged at one side of the die head and used for inputting a fiber tow into the first chamber; an electrostatic generating component and a negative pressure generating component arranged below the die head and used for causing the fiber tow output from the first chamber to be dispersed into first fiber filaments, causing the melt output from the second chamber to form second fiber filaments, and causing the first fiber filaments and the second fiber filaments to be compounded to form a composite non-woven fabric.

2. The apparatus according to claim 1, wherein The second chamber is provided with two second chambers arranged at two sides of the first chamber respectively.

3. The apparatus according to claim 1, wherein An inside of the die head is provided with a heat insulation sleeve, a sleeve wall of the heat insulation sleeve forming a chamber wall of the first chamber.

4. The apparatus according to claim 1, wherein A winding mechanism is arranged below the electrostatic generating component and the negative pressure generating component, the winding mechanism comprising a winding roller used for winding the composite non-woven fabric.

5. The apparatus according to claim 4, wherein An upper side of the winding roller is provided with a conveying mechanism, the conveying mechanism comprising a conveying belt used for conveying the composite non-woven fabric.

6. The apparatus according to claim 2, wherein The die head comprises a first plate, a second plate, a third plate and a fourth plate connected in sequence, one of the second chambers being formed between the first plate and the second plate, the first chamber being formed between the second plate and the third plate, and another of the second chambers being formed between the third plate and the fourth plate.

7. The apparatus according to claim 6, wherein One end of the die head is provided with a connecting component, an inside of the connecting component being provided with two connecting channels, the connecting component being connected with the extruder, flow guide channels being formed at upper ends of the two second chambers between the first plate and the second plate and between the third plate and the fourth plate respectively, one end of each of the two flow guide channels being communicated with the two second chambers respectively, and the other end of each of the two flow guide channels being communicated with the two connecting channels respectively.

8. The apparatus according to claim 1, wherein The fiber supply mechanism comprises a godet, a godet rod and a fiber dividing disc, the godet rod being connected with the fiber dividing disc, and the fiber dividing disc being above the die head.

9. The apparatus according to claim 4, wherein A hot pressing mechanism is further arranged at one side of the winding mechanism, the hot pressing mechanism being used for hot pressing the composite non-woven fabric wound by the winding mechanism.

10. A method for producing a composite nonwoven fabric using the production apparatus for a composite nonwoven fabric according to any one of claims 1 to 9, characterized by, The method comprises: preheating the extruder and the die head; adding the polymer into the extruder; inputting the fiber tow into the first chamber by using the fiber supply mechanism; starting the electrostatic generating component and the negative pressure generating component, causing the fiber tow output from the first chamber to be dispersed into the first fiber filaments, causing the melt output from the second chamber to form the second fiber filaments, and causing the first fiber filaments and the second fiber filaments to be compounded to form the composite non-woven fabric.

11. The method for producing a composite nonwoven fabric according to claim 10, characterized by The method further comprises: collecting the composite non-woven fabric compounded by the first fiber filaments and the second fiber filaments.

12. The method for producing a composite nonwoven fabric according to claim 11, characterized by The method further comprises: hot pressing the collected composite non-woven fabric.

13. The method for preparing the composite nonwoven fabric according to claim 10, characterized in that, The preheating temperature of the extruder is 50-300℃.

14. The method for preparing the composite nonwoven fabric according to claim 10, characterized in that, The polymer is low-density polyethylene, or a mixture of at least two low-density polyethylenes, or a mixture of low-density polyethylene with a melt index of ≥10 g / 10 min and high-density polyethylene; the fiber tows are high-molecular-weight polyethylene fiber tows or fiber tows of high-density polyethylene material.

15. The composite nonwoven fabric prepared by the method of any one of claims 10-14.

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