A multi-layer composite hemp nonwoven fabric forming apparatus

Abstract

The utility model discloses a kind of multi-layer composite straw nonwoven fabric forming equipment, including pulverizer and the wood pulp conveying flue connected with pulverizer, wherein, the end of wood pulp conveying flue is connected with airflow entrance;Wood pulp conveying flue's terminal end conveys wood pulp air mixed flow to net curtain, wherein, first melt-blow die head, second melt-blow die head and third melt-blow die head are also provided on net curtain;Net suction port is also provided on net curtain, wherein, net suction port is set relative to the terminal end of wood pulp conveying flue.The utility model can be in the same time three sets of melt-blow system can be different polymer respectively spinning, different hand feeling, different surface performance and double-sided different color composite straw product can be obtained;The production assembly line is simplified, conducive to improving the efficiency of production;Produced straw nonwoven fabric has degradable function, conducive to environmental protection.

Description

Technical Field

[0001] This utility model relates to a forming equipment for spun nonwoven fabric, and particularly to a forming equipment for multilayer composite spun nonwoven fabric. Background Technology

[0002] Wiping products have a huge market, covering multiple fields such as daily life, hygiene and cleaning, medical and health care, and industry.

[0003] In wiping products, nonwoven fabric, known as "hefang," is the most abundant basic material. Most existing hefang nonwoven fabrics on the market use wood pulp fiber as the base material, which is then reinforced with polymer fiber materials. However, the existing process for producing hefang nonwoven fabrics suffers from complex manufacturing processes and long workflows, resulting in low production efficiency. Furthermore, the coating of wood pulp fiber is insufficient, leading to excessive shedding during use and affecting the product's usability. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a multi-layer composite nonwoven fabric forming equipment, which solves the problem of insufficient covering properties.

[0005] The technical problem to be solved by this utility model is achieved by the following technical solution:

[0006] This utility model provides a multi-layer composite spunbond nonwoven fabric forming device, including a pulverizer and a wood pulp conveying channel connected to the pulverizer, wherein...

[0007] The end of the wood pulp conveying channel is connected to an airflow inlet;

[0008] The end of the wood pulp conveying channel transmits a wood pulp-air mixture to the forming screen, wherein...

[0009] The forming curtain is also provided with a first meltblown die head, a second meltblown die head and a third meltblown die head;

[0010] The mesh curtain is also equipped with a mesh air intake, wherein...

[0011] The mesh-forming air intake is positioned relative to the end of the wood pulp conveying channel.

[0012] As a preferred embodiment of the present invention, the first meltblown die head forms a first fiber curtain on the forming curtain, the second meltblown die head forms a second fiber curtain on the forming curtain, and the third meltblown die head forms a third fiber curtain on the forming curtain.

[0013] As a preferred embodiment of this utility model, the forming curtain passes through a consolidation hot rolling roller, wherein the consolidation hot rolling roller is used to form a nonwoven fabric.

[0014] As a preferred embodiment of the present invention, the first meltblown die head is a bottom layer meltblown die head, the second meltblown die head is a mixed meltblown die head, and the third meltblown die head is a surface layer meltblown die head.

[0015] As a preferred embodiment of this utility model, the forming screen is provided with the first meltblown die head, the second meltblown die head and the third meltblown die head in sequence.

[0016] As a preferred embodiment of this invention, the angle between the wood pulp-air mixture flow and the second meltblown die head is less than 90 degrees.

[0017] Preferably, the rotation angle of the first meltblown die head, the second meltblown die head, and the third meltblown die head includes 0° to 90°.

[0018] The beneficial effects of this utility model are as follows: This utility model allows three sets of meltblown systems to use different polymers to spin fibers simultaneously, resulting in composite woven products with different hand feel, surface properties, and colors on both sides; it simplifies the production line, improving production efficiency; the produced woven nonwoven fabric is biodegradable, which is environmentally friendly; simultaneously, the intermediate layer mixed with wood pulp fibers is coated and bonded from the bottom and top layers, effectively solving the problem of easy shedding and improving product quality; the first and third meltblown dies form lightweight ultrafine fiber layers on both surfaces of the composite product, effectively preventing the shedding of ultra-short wood pulp fibers; the second meltblown die forms a certain angle with the wood pulp air mixing flow, and the degree to which the meltblown fibers penetrate the wood pulp flow is adjustable, effectively limiting the movement of the wood pulp; the mixing zone is close to the mesh curtain, greatly reducing the load on the suction fan, effectively reducing installed power and actual energy consumption. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a partial structural schematic diagram of the present invention;

[0021] In the diagram: 1. Wood pulp roll; 2. Crusher; 3. Airflow inlet; 4. Wood pulp conveying channel; 5. Wood pulp air mixing flow; 6. First meltblown die; 7. Second meltblown die; 8. Third meltblown die; 9. First fiber curtain; 10. Second fiber curtain; 11. Third fiber curtain; 12. Web forming air intake; 13. Consolidated hot roller; 14. Grain-spun nonwoven fabric; 15. Web forming curtain. Detailed Implementation

[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0023] Example

[0024] like Figure 1-2 As shown, this embodiment provides a multilayer composite grain nonwoven fabric forming equipment, including a crusher 1 and a wood pulp conveying channel 4 connected to the crusher 1, wherein the end of the wood pulp conveying channel 4 is connected to an airflow inlet 3;

[0025] The end of the wood pulp conveying channel 4 conveys the wood pulp air mixing flow 5 to the forming curtain 15, wherein the forming curtain 15 is also provided with a first meltblown die head 6, a second meltblown die head 7 and a third meltblown die head 8;

[0026] The forming curtain 15 is also provided with a forming air inlet 12, which is located at the end of the wood pulp conveying channel 4.

[0027] The first meltblown die head 6 forms a first fiber curtain 9 on the forming curtain 15, the second meltblown die head 7 forms a second fiber curtain 10 on the forming curtain 15, and the third meltblown die head 8 forms a third fiber curtain 11 on the forming curtain 15.

[0028] The forming curtain 15 passes through a bonded hot rolling roll 13, wherein the bonded hot rolling roll 13 is used to form a nonwoven fabric 14.

[0029] The first meltblown die head 6 is the bottom layer meltblown die head, the second meltblown die head 7 is the mixed meltblown die head, and the third meltblown die head 8 is the surface layer meltblown die head.

[0030] On the forming screen 15, the first meltblown die head 6, the second meltblown die head 7, and the third meltblown die head 8 are arranged in sequence.

[0031] The angle between the wood pulp air mixing flow 5 and the second meltblown die head 7 is less than 90 degrees, which makes the degree to which the meltblown fibers penetrate the wood pulp flow adjustable and can effectively limit the movement of the wood pulp.

[0032] Preferably, the rotation angles of the first meltblown die 6, the second meltblown die 7, and the third meltblown die 8 range from 0° to 90°.

[0033] Specifically, the following is a typical implementation process:

[0034] The production equipment includes at least three screw extrusion mechanisms, each corresponding to at least three meltblown dies (i.e., the first meltblown die 6, the second meltblown die 7, and the third meltblown die 8). The pulverizer 2 guides the fibers separated from the combing process from the pulverizer to the wood pulp conveying channel 4 of the web forming machine. There are three airflows above the web forming machine screen 15. The web forming machine simultaneously separates the three airflows, collects the fibers, and continuously sends the composite fiber web screen 15 into the thermal bonding roller 13, and then to the slitting and winding machine.

[0035] The bottom meltblown die 6 is located above the forming curtain 15, in front of the forming air intake. The airflow holding the ultrafine meltblown fibers is separated into air and fibers by the suction device, depositing the first layer of low-basis-weight ultrafine fiber web on the curtain. The height of the first meltblown die 6 from the forming surface can be adjusted between 100 and 300 mm to adapt to the needs of different products. The pulverizer 2 is located above the inlet of the wood pulp conveying channel 4, which is located above the forming curtain 15. The outlet of the wood pulp conveying channel 4 is located above the forming air intake 12 and forms an angle of less than 90 degrees with the forming curtain. The second meltblown die 7 is located on the side of the wood pulp channel outlet above the forming curtain. The second meltblown die 7 can move horizontally and rotate. The sprayed second fiber curtain 10, which holds the fibers, merges with the wood pulp air mixture 5 containing wood pulp. Above the suction port of the web forming machine, the second fiber curtain 10 intertwines with the wood pulp air mixture 5 to form a mixing zone, which is located approximately 10 to 100 mm above the web forming curtain 15. This mixing zone is directly opposite the center of the web forming suction port where the suction is strongest. Through air-fiber separation by the suction device, a second layer—the mixed fiber layer—is formed. Incompletely bound ultra-short wood pulp fibers are blocked by the first layer of ultra-fine meltblown fiber web, preventing them from being lost with the suction airflow. The third meltblown die 8 is also located above the web forming curtain 15, at the rear of the web forming suction port. The airflow holding the ultra-fine meltblown fibers undergoes air-fiber separation through the suction device, depositing a third layer of low-basis-weight ultra-fine fiber web on the web curtain. The bonded hot roller 13 is located between the web forming curtain 15 and the winding and slitting mechanism.

[0036] During operation: Polymer chips are quantitatively fed to the meltblown dies (i.e., the first meltblown die 6, the second meltblown die 7, and the third meltblown die 8) according to the mature meltblown process, and the chips are spun to each air intake. The DCD distance of the first meltblown die 6 is adjusted as needed.

[0037] The second meltblown die 7 can be adjusted in terms of its tilt angle and horizontal position according to the needs of different specifications and requirements of products. The second meltblown die 7 can rotate arbitrarily between 0 and 90 degrees, and the horizontal distance between it and the wood pulp channel outlet can be adjusted arbitrarily within a range of 200mm. The sprayed fibers enter the mixing zone at the required angle and position.

[0038] Wood pulp fibers are unwound and fed into the pulverizer 2. After being crushed and split, they are mixed with the process airflow and, guided by the airflow, sprayed out along the wood pulp channel above the forming air intake near the forming curtain, entering the mixing zone. Simultaneously, the fibers and wood pulp entering the mixing zone mix above the forming curtain, near it. During mixing, some fibers are required to penetrate the wood pulp flow. The width of the mixed layer falling onto the forming curtain is controlled to be approximately 150mm.

[0039] The third meltblown die head 8 is located behind the second meltblown die head 7. The air volume of the air intake below it can be controlled by a regulating valve. When producing products of different specifications, it is necessary to adjust the valve to control its air volume to ensure the stability of the wood pulp fibers on the upper surface of the mixed layer that are not completely fixed, and to prevent them from being blown away by the airflow of the third meltblown die head 8.

[0040] This invention allows three meltblown systems to simultaneously spin fibers from different polymers, resulting in composite woven products with varying hand feel, surface properties, and colors on both sides. It simplifies the production line, improving efficiency. The produced woven nonwoven fabric is biodegradable, contributing to environmental protection. The intermediate layer, mixed with wood pulp fibers, is bonded to the bottom and top layers, effectively solving the problem of easy shedding and improving product quality. The first and third meltblown dies form lightweight ultrafine fiber layers on both surfaces of the composite product, effectively preventing the shedding of ultra-short wood pulp fibers. The second meltblown die forms a mixing angle with the wood pulp airflow, and the degree to which the meltblown fibers penetrate the wood pulp flow is adjustable, effectively limiting pulp movement. The mixing zone is close to the mesh curtain, significantly reducing the load on the suction fan and effectively lowering installed power and actual energy consumption.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-layer composite spunbond nonwoven fabric forming equipment, characterized in that, Includes a pulverizer (1) and a wood pulp conveying channel (4) connected to the pulverizer (1), wherein, The end of the wood pulp conveying channel (4) is connected to an airflow inlet (3); The end of the wood pulp conveying channel (4) delivers a wood pulp-air mixture (5) to the forming screen (15), wherein, The forming curtain (15) is also provided with a first meltblown die head (6), a second meltblown die head (7) and a third meltblown die head (8); The mesh curtain (15) is also provided with a mesh air intake (12), wherein, The mesh-forming air intake (12) is positioned relative to the end of the wood pulp conveying channel (4).

2. The multi-layer composite spunbond nonwoven fabric forming equipment according to claim 1, characterized in that, The first meltblown die (6) forms a first fiber curtain (9) on the forming curtain (15), the second meltblown die (7) forms a second fiber curtain (10) on the forming curtain (15), and the third meltblown die (8) forms a third fiber curtain (11) on the forming curtain (15).

3. The multi-layer composite spunbond nonwoven fabric forming equipment according to claim 1, characterized in that, The forming curtain (15) passes through a bonded hot roller (13), wherein the bonded hot roller (13) is used to form a nonwoven fabric (14).

4. The multi-layer composite spunbond nonwoven fabric forming equipment according to claim 1, characterized in that, The first meltblown die (6) is a bottom layer meltblown die, the second meltblown die (7) is a mixed meltblown die, and the third meltblown die (8) is a top layer meltblown die.

5. The multi-layer composite spunbond nonwoven fabric forming equipment according to claim 4, characterized in that, The mesh curtain (15) consists of the first meltblown die head (6), the second meltblown die head (7), and the third meltblown die head (8) in sequence.

6. The multi-layer composite spunbond nonwoven fabric forming equipment according to claim 5, characterized in that, The angle between the wood pulp air mixing flow (5) and the second meltblown die head (7) is less than 90 degrees.

7. The multi-layer composite spunbond nonwoven fabric forming equipment according to claim 5, characterized in that, The rotation angles of the first meltblown die (6), the second meltblown die (7), and the third meltblown die (8) range from 0° to 90°.

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