CN216514487U

CN216514487U - Non-woven fabric production system with high fiber orientation degree

Info

Publication number: CN216514487U
Application number: CN202122951477.6U
Authority: CN
Inventors: 陈文杰; 李孙辉; 黄恒芳; 潘玉媚; 谭星强
Original assignee: Jiangsu Wendefu Nonwoven Technology Co ltd; Guangdong Bidefu Medical And Health Technology Co ltd
Current assignee: Jiangsu Wendefu Nonwoven Technology Co ltd; Guangdong Bidefu Medical And Health Technology Co ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-05-13
Anticipated expiration: 2031-11-29

Abstract

The utility model discloses a non-woven fabric production system with high fiber orientation degree, which comprises a spinning mechanism and a web former, wherein the web former is used for receiving fibers spun by the spinning mechanism and accumulating the fibers into a web; the anode of the high-voltage power supply is connected with the spinning mechanism, and the cathode of the high-voltage power supply is connected with the two electrode plates; the prepared non-woven fabric product has the characteristics of small fiber diameter, high longitudinal orientation degree, large longitudinal strength and the like, and can be industrially, massively and continuously produced.

Description

Non-woven fabric production system with high fiber orientation degree

Technical Field

The utility model relates to the technical field of non-woven fabric production equipment, in particular to a non-woven fabric production system with high fiber orientation degree.

Background

In the production of spun-bonded nonwoven fabrics or melt-blown nonwoven fabrics, the degree of fiber orientation is increased as much as possible mainly by increasing the web forming speed, and the degree of increase of the web forming speed is relatively limited, so that the degree of fiber orientation is also limited by the method. In addition, the gram weight of the non-woven fabric is reduced after the web forming speed is increased, so that the method for improving the fiber orientation degree by increasing the web forming speed can only be applied to thin non-woven fabric products with low gram weight, and the popularization and application of the non-woven fabric with high fiber orientation degree are greatly limited.

There are two main directions of research currently in the production of oriented fibers: firstly, the original device is improved to change the spinning environment to prepare the oriented fiber: the other is to utilize the stable linear motion stage in the electrostatic spinning jet flow motion process to reduce the unstable motion in the jet flow falling process by certain measures so as to prepare the oriented fiber. Much research on electrospinning for producing oriented fibers has been done, but most of them are directed to solution electrospinning and mainly utilize improvements in the apparatus for producing oriented fibers. And the related research of melt electrostatic spinning with good industrialization prospect is almost not available, and the research of preparing the oriented fiber by utilizing a stable jet flow stage is not available.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a non-woven fabric production system with high fiber orientation degree, and the prepared non-woven fabric product can be applied to the fields of material compounding, filtering and separating, wound dressing, protective clothing and the like in the aspect of biomedicine.

In order to achieve the above purpose, the non-woven fabric production system with high fiber orientation degree provided by the utility model comprises a spinning mechanism and a web former, wherein the web former is used for receiving fibers spun by the spinning mechanism and accumulating the fibers into a web; the positive pole of the high-voltage power supply is connected with the spinning mechanism, and the negative pole of the high-voltage power supply is connected with the two electrode plates.

Further, the spinning mechanism is a spun-bonded assembly, wherein a spinneret plate of the spun-bonded assembly is connected with a positive electrode of a high-voltage power supply.

Further, a side blowing channel and a drafting channel are arranged below the spun-bonded assembly.

Further, the device also comprises a pre-pressing roller arranged above the net forming surface of the net forming machine and a hot roller group arranged at the downstream of the net forming machine.

Further, the spinning mechanism is a melt-blowing assembly, wherein a melt-blowing die head of the melt-blowing assembly is connected with a positive electrode of a high-voltage power supply.

Furthermore, hot air flow channels are arranged on two sides of the outlet of the melt-blowing die head of the melt-blowing assembly.

Further, the device also comprises a suction unit which is arranged below the mesh forming surface and between the two electrode plates.

The utility model adopts the scheme, and has the beneficial effects that: the electrostatic spinning mechanism is matched with the spinning mechanism and the web former to prepare the non-woven fabric product with high orientation degree, and the non-woven fabric product has the characteristics of small fiber diameter, high longitudinal orientation degree, high longitudinal strength and the like, and can be produced industrially, massively and continuously.

Drawings

Fig. 1 is a schematic structural diagram of the first embodiment.

Fig. 2 is a schematic structural diagram of the second embodiment.

The device comprises a spunbonded component 101, a cross-blowing channel 11, a drafting channel 12, a pre-pressing roller 13, a hot roller group 14, a melt-blowing component 102, a web former 20, a high-voltage power supply 31, an electrode plate 32, a suction unit 40 and a hot air flow channel 21.

Detailed Description

To facilitate an understanding of the utility model, the utility model is described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete.

Referring to fig. 1 and 2, in the present embodiment, a nonwoven fabric production system with high fiber orientation degree includes a spinning mechanism, a web former 20 and an electrostatic spinning mechanism, wherein the web former 20 is used for receiving fibers spun by the spinning mechanism and accumulating the fibers into a web. Specifically, the spinning mechanism of the present embodiment may be a spunbond component 101 or a meltblown component 102, which may be selected according to actual production requirements, and the following further explanation is made on the embodiments of the spunbond component 101 and the meltblown component 102, respectively, for easy understanding.

Referring to fig. 1, the first embodiment: when the spinning mechanism is a spinning assembly 101, the spinning assembly 101 mainly comprises a filter plate, a distribution plate and a spinning plate, wherein the filter plate is used for filtering impurities of the melt and preventing spinning holes from being blocked; the distribution plate distributes the melt to each spinneret orifice on the spinneret plate; the spinneret plate is provided with spinneret orifices which are outlets for polymer melt to flow out. The working principle and the structural features of the above-mentioned components belong to the common general knowledge of those skilled in the art, and are not described in detail herein. The spunbond assembly 101 at this point was used to eject spunbond fibers.

Further, a side blowing channel 11 and a drawing channel 12 are arranged below the spun-bonded assembly 101, wherein the side blowing channel 11 is positioned at two sides of the position below the spinneret plate, so that high-speed cold air flow is provided, and the polymer melt is drawn, refined, cooled and oriented in the drawing channel 12. The common temperature range of the cooling air is 10-20 ℃.

Further, the system comprises a prepressing roll 13 arranged above the web forming surface of the web forming machine 20 and a hot roll group 14 arranged downstream of the web forming machine 20, wherein the prepressing roll 13 cooperates with the web forming surface to prepress the spun-bonded fiber web which is attached to the web forming surface. The hot roll set 14 is composed of a pair of hot rolls arranged one above the other, and is used for hot embossing the pre-pressed spunbond web to obtain a desired spunbond nonwoven fabric. The structure principle of the prepress roll 13 and the hot roll is conventional technical means, and will not be described in detail herein.

Referring to fig. 2, the second embodiment: when the spinning mechanism is a meltblown module 102, the meltblown module 102 is mainly composed of a meltblown die head, and the working principle and the structural features of the above components are well known to those skilled in the art and will not be described herein again. The spunbond assembly 101 at this point is used to eject meltblown fibers.

Furthermore, hot air flow channels 21 are arranged on two sides of the outlet of the melt-blowing die head of the melt-blowing assembly 102 and are used for ejecting high-speed hot air flow to contact with the polymer melt flowing out of the melt-blowing die head, and the high-speed air flow can draw and divide the melt into filaments to finally form fine fibers.

In this embodiment, the electrostatic spinning mechanism is suitable for both of the above two embodiments, wherein the electrostatic spinning mechanism includes two electrode plates 32 and a high voltage power supply 31, the two electrode plates 32 are horizontally arranged below the web forming surface of the web forming machine 20 at intervals along the web forming direction, and the length of the electrode plate 32 is greater than the width of the prepared non-woven fabric. The positive pole of the high-voltage power supply 31 is connected with the spinning mechanism, so that the melt sprayed by the spinning mechanism has a proper amount of positive charges, and the negative pole of the high-voltage power supply 31 is connected with the two electrode plates 32, so that the spinning mechanism is matched to form a high-voltage electrostatic field, so that an electric field force is applied to the polymer solution with the positive charges, and the polymer melt is longitudinally arranged on the two parallel electrodes under the actions of high-speed flow, the electric field force and the net forming traction force.

Specifically, for the spunbond assembly 101 of the first embodiment, the polymer melt is drawn, divided and refined into finer melt streams by the vertical downward gravity and the high velocity gas stream, which is positively charged just as it exits the spinneret. When entering the lower drawing channel 12, the distance from the two electrode plates 32 is shortened, the strength of the electric field force applied to the polymer melt stream is gradually increased, and the melt stream can deviate between the two electrode plates 32. Finally, the interaction of the electric field force, the high-speed airflow drafting force and the traction force of the net forming movement is combined, so that the melt trickle is cooled and solidified, and the longitudinal arrangement of the net forming is realized between the two electrode plates 32. Because the electrode plates 32 are below the web-forming surface, the web does not contact the electrode plates 32, but rather moves as the web runs.

For the second embodiment of the meltblown module 102, the polymer melt is charged with a proper amount of positive charges when being ejected from the meltblown die head, and the melt is subjected to the electric field force, the high-speed airflow stretching force and the traction force for moving the web after flowing out, so that the meltblown web with high fiber orientation degree is formed.

In the embodiment, the suction unit 40 is further included and is arranged below the web forming surface and between the two electrode plates 32, and the negative pressure effect of the suction unit 40 is utilized to adsorb the fibers on the web forming surface, so that web forming is facilitated. The suction unit 40 of the present embodiment is externally connected with a negative pressure generator (not shown).

Further, the spunbond component 101 and the meltblown component 102 are each further provided with a screw extruder, a filter and a metering pump, wherein the screw extruder is used for heating, melting and plasticizing the polymer raw material and the dressing to form a uniform melt; the filter is used for filtering impurities in the melt; the metering pump is used for accurately metering and regulating the extrusion amount of the polymer melt. The structural principles of the screw extruders, the filters and the metering pumps are well known and will not be described in detail herein.

The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to limit the present invention in any way. Those skilled in the art can make many changes, modifications, and equivalents to the embodiments of the utility model without departing from the scope of the utility model as set forth in the claims below. Therefore, equivalent changes made according to the spirit of the present invention should be covered within the protection scope of the present invention without departing from the contents of the technical scheme of the present invention.

Claims

1. A high fiber orientation nonwoven production system comprising a spinning mechanism and a web former (20), wherein the web former (20) is configured to receive fibers spun by the spinning mechanism and accumulate the fibers into a web, characterized in that: the electrostatic spinning device further comprises an electrostatic spinning mechanism, wherein the electrostatic spinning mechanism comprises two electrode plates (32) and a high-voltage power supply (31), and the two electrode plates (32) are horizontally arranged below the net forming surface of the net forming machine (20) at intervals along the net forming direction; the anode of the high-voltage power supply (31) is connected with the spinning mechanism, and the cathode of the high-voltage power supply (31) is connected with the two electrode plates (32).

2. The system for producing a nonwoven fabric having a high degree of fiber orientation according to claim 1, wherein: the spinning mechanism is a spun-bonded assembly (101), wherein a spinning plate of the spun-bonded assembly (101) is connected with the positive electrode of a high-voltage power supply (31).

3. The system for producing a nonwoven fabric having a high degree of fiber orientation according to claim 2, wherein: a side blowing channel (11) and a drafting channel (12) are arranged below the spun-bonded assembly (101).

4. The system for producing a nonwoven fabric having a high degree of fiber orientation according to claim 2, wherein: also comprises a pre-pressing roller (13) arranged above the net forming surface of the net forming machine (20) and a hot roller group (14) arranged at the downstream of the net forming machine (20).

5. The system for producing a nonwoven fabric having a high degree of fiber orientation according to claim 1, wherein: the spinning mechanism is a melt-blowing assembly (102), wherein the melt-blowing die head of the melt-blowing assembly (102) is connected with the positive pole of a high-voltage power supply (31).

6. The system for producing a nonwoven fabric having a high degree of fiber orientation according to claim 5, wherein: the two sides of the outlet of the melt-blowing die head of the melt-blowing assembly (102) are provided with hot air flow channels (21).

7. The system for producing a nonwoven fabric having a high degree of fiber orientation according to claim 1, wherein: also included is a suction unit (40) disposed below the web-forming surface and between the two electrode plates (32).