WO2018235866A1 - Discharge nozzle for nanofiber manufacturing apparatus, and nanofiber manufacturing apparatus equipped with discharge nozzle - Google Patents

Abstract

The problem addressed by the present invention is to provide a discharge nozzle for a nano fiber manufacturing device and a nano fiber manufacturing device provided with the discharge nozzle wherein when manufacturing nano fiber, specifications such as the diameter of fiber being manufactured can easily be changed, thereby improving device versatility and workability. A discharge nozzle 2 attached to a nano fiber manufacturing device 1 has a divided type nozzle unit 6 formed of: a molten/dissolved resin discharge opening 9 that discharges molten/dissolved resin; a molten/dissolved resin flow path 10 for feeding molten resin to the molten/dissolved resin discharge opening 9; a hot air discharge opening 11 for discharging hot air; and a hot air flow path 12 for feeding hot air to the hot air discharge opening 11. The divided type nozzle unit 6 is of a constitution that can be divided into first through fourth nozzle units 6a – 6d.

Description

Discharge nozzle for nanofiber manufacturing apparatus, and nanofiber manufacturing apparatus equipped with discharge nozzle

The present invention relates to a discharge nozzle for a nanofiber manufacturing apparatus that manufactures fine fibers, and a nanofiber manufacturing apparatus equipped with the discharge nozzle.

Nanofibers are used in various fields by taking advantage of the characteristics of fine fibers. In recent years, there has been a demand for the production of nanofibers such as non-woven fabrics with ultrafine fibers, in which fibers of various diameters and lengths according to the application are intricately intertwined. Techniques for producing fine fibers are disclosed, for example, in Patent Documents 1 and 2. The microfiber manufacturing apparatus disclosed in Patent Literatures 1 and 2 includes substantially the same melt-blowing die. This ultrafine fiber manufacturing apparatus comprises one or more liquid nozzles capable of discharging a heated molten resin (Patent Document 1) or a polymer solution in which a raw material polymer is dissolved in a solvent (molten resin discharged from the liquid nozzle) Alternatively, the polymer solution is provided with one or more hot air nozzles for blowing hot air and stretching it in a fibrous form. According to Patent Documents 1 and 2, it is disclosed that a molten resin is stably spun into fine fibers with a small amount of hot air gas by an ultrafine fiber manufacturing apparatus.

Patent No. 5946569 gazette Patent No. 5946565 gazette

However, the apparatus for producing microfibers described in Patent Documents 1 and 2 can not appropriately change the diameter and inclination of the liquid nozzle and the hot air nozzle accordingly, for example, when it is intended to produce fibers with different fiber diameters. . In order to change the conventional liquid nozzle and the hot air nozzle, it was only necessary to replace the entire nozzle.

The present invention has been made in view of the above problems, and when manufacturing nanofibers, it is possible to easily change specifications such as the diameter of a fiber to be manufactured, thereby improving the diversity and the workability of the device. An object of the present invention is to provide a discharge nozzle for a nanofiber manufacturing apparatus, and a nanofiber manufacturing apparatus including the discharge nozzle.

The discharge nozzle attached to the nanofiber manufacturing apparatus of the present invention discharges the molten / melted resin discharged from the molten / melted resin discharge port so as to be induced by the hot air discharged from the hot air discharge port to melt / melt the molten resin A discharge nozzle attached to a nanofiber manufacturing apparatus for forming a fine fiber by drawing in a fibrous form, comprising:
It is characterized by having a split type nozzle unit which can be divided into a plurality of units, in which a melting / melting resin discharge port and a hot air discharge port are formed.

Furthermore, the discharge nozzle attached to the nanofiber manufacturing apparatus of the present invention is characterized in that the split type nozzle unit can be split such that at least one of the melt / melt resin flow channel and the hot air flow channel is divided into a plurality. I assume.

Furthermore, the discharge nozzle attached to the nanofiber manufacturing apparatus of the present invention maintains the airtightness of the divided joint at the divided joint of the divided nozzle unit, and the temperature of the hot air used and the characteristics of the molten / melted resin It is characterized in that a seal plate such as a packing structure made of metal or special material excellent in heat resistance, pressure resistance and chemical resistance is interposed.

Furthermore, in the discharge nozzle attached to the nanofiber manufacturing apparatus of the present invention, the split-type nozzle unit comprises the first to fourth nozzle units, and the melting / melting resin inflow unit as the first nozzle unit, and the second nozzle A hot air inflow unit as a unit, a resin / hot air introduction unit as a third nozzle unit, and a discharge unit as a fourth nozzle unit are characterized.

The discharge nozzle attached to the nanofiber manufacturing apparatus of the present invention discharges the molten / melted resin discharged from the molten / melted resin discharge port so as to be induced by the hot air discharged from the hot air discharge port to melt / melt the molten resin A discharge nozzle attached to a nanofiber manufacturing apparatus for forming a fine fiber by drawing in a fibrous form, comprising:
It has a split nozzle unit that can be split into multiple units,
The hot air discharge port is formed as a single rectangular slit-like hot air discharge port on the front wall surface of the split-type nozzle unit,
The melt / melt resin discharge port is a melt / melt resin discharge port group including a plurality of discharge ports arranged in a straight line, and the melt / melt resin discharge port group is formed on the front wall surface of the divided nozzle unit. Has been
The molten and melted resin discharge port group is disposed along the longitudinal direction of the hot air discharge port.

The nanofiber manufacturing apparatus of the present invention discharges the molten / melted resin discharged from the molten / melted resin discharge port so as to be induced by the hot air discharged from the hot air discharge port, and stretches the melted / melted resin into a fiber shape A nanofiber manufacturing apparatus for forming fine fibers,
A discharge nozzle having a split nozzle unit which can be divided into a plurality of units;
The hot air discharge port is formed as a single rectangular slit-like hot air discharge port on the front wall surface of the split-type nozzle unit,
The melt / melt resin discharge port is a melt / melt resin discharge port group consisting of a plurality of discharge ports arranged in a straight line, and the melt / melt resin discharge port group consisting of the plurality is in front of the divided nozzle unit. Formed on the wall of the
The molten and melted resin discharge port group is disposed along the longitudinal direction of the hot air discharge port.

According to the present invention, the discharge nozzle is configured to be divisible into a plurality of units. Since it did in this way, when manufacturing the nanofiber of the fiber diameter according to a request, it is possible to divide | segment and replace some units of the division | segmentation nozzle unit in which the fusion | melting / melt | dissolution resin discharge port and the hot air discharge port were formed. it can. Therefore, the unit can be easily replaced with a unit having a melt / melt resin discharge port or a hot air discharge port so as to correspond to the desired specifications such as the fiber diameter. By this, it is possible to achieve excellent replacement workability and to shorten the working time, and it is possible to provide a fiber whose cost has been reduced and a nonwoven fabric made of the fiber.

Furthermore, when manufacturing a non-woven fabric, hot air is blown out from a hot air discharge port formed as one slit, and melt / melted resin discharge port group consisting of a plurality of discharge ports arranged in a straight line with respect to it. Dissolve the molten resin simultaneously. Since it did in this way, blowout of fusion | melting / melt | dissolution resin discharged from each fusion | melting / melt | dissolution resin discharge port can be optimized with respect to a hot air. As a result, it is possible to suppress the unevenness in quality of the molded fibers, and to obtain high-quality nanofibers.

Furthermore, the divided nozzle units can be easily assembled integrally by means of fixing means such as bolts. Therefore, the time of complicated assembly and disassembly work can be shortened, and the cost of the manufactured fiber can be suppressed at a low cost.

It is a perspective view showing a split type nozzle attached to a nanofiber manufacturing apparatus as one example of the present invention. FIG. 2 is an enlarged front view of the split-type nozzle of FIG. 1, showing an enlarged part of FIG. 1 represented by an alternate long and short dash line. It is a longitudinal cross-sectional view of the split-type nozzle of FIG. It is a longitudinal cross-sectional view of the split-type nozzle attached to the nanofiber manufacturing apparatus as another Example of this invention. FIG. 5 is a cross-sectional view along a hot air flow path formed in a split-type nozzle attached to a nanofiber manufacturing apparatus as one embodiment of the present invention, and is an example of a cross-sectional view along line AA in FIG. 3 and FIG. FIG. 5 is a cross-sectional view along a solution flow path formed in a split-type nozzle attached to a nanofiber manufacturing apparatus as one embodiment of the present invention, and is an example of a cross-sectional view taken along line BB in FIGS. 3 and 4; It is a principal part longitudinal cross-sectional view of the 4th nozzle unit which comprises the split type nozzle attached to the nanofiber manufacturing device as one example of the present invention. It is the schematic which shows the positional relationship of the fusion | melting / melt | dissolution resin discharge port formed in the split-type nozzle attached to the nanofiber manufacturing apparatus as one Example of this invention, and a hot-air discharge port. It is sectional drawing which shows the modification of the nozzle | cap | die comprised in the split-type nozzle attached to the nanofiber manufacturing apparatus as one Example of this invention.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 9. Of course, the present invention is not limited to the specific embodiments described in the examples. Those skilled in the art may appropriately add, delete, or change design elements of the embodiment to the embodiment, or those appropriately combining the features of the embodiment without departing from the scope of the present invention. include. In the specification of the present application, “forward” refers to the left direction in FIGS. 3 and 4.

The configuration of the split-type discharge nozzle 2 attached to the nanofiber manufacturing apparatus 1 of the present embodiment will be described based on FIGS. 1 to 9. The nanofiber manufacturing apparatus 1 discharges the molten / melted resin discharged from the molten / melted resin discharge port 9 so as to be induced by the hot air discharged from the hot air discharge port 11, and stretches the melted / melted resin into a fiber shape To form fine fibers. The nanofiber manufacturing apparatus 1 to which the discharge nozzle 2 in this embodiment is attached blows hot air against a molten resin to be discharged or a resin dissolved in a solvent (referred to as “melt / melt resin” in the present invention) The molten / melted resin is drawn into an ultrafine diameter long fiber to produce an ultrafine diameter long fiber. The discharge nozzle 2 for discharging the molten / melted resin attached to the nanofiber manufacturing apparatus 1 is a molten / melted resin supply device 3 (not shown in detail) for introducing a resin melted in a heated / melted resin or a solvent, and a hot air The hot air supply device 4 (not shown in detail) for introducing the

The discharge nozzle 2 has a split nozzle unit 6. The split nozzle unit 6 can be split into first to fourth nozzle units 6a to 6d. The first to fourth nozzle units 6a to 6d are arranged in order from the right side to the left side in FIGS. 3 and 4. A seal plate 7 for maintaining air tightness is provided at divided joint portions which are adjacent portions of the first to fourth nozzle units 6a to 6d. That is, between the first nozzle unit 6a and the second nozzle unit 6b, between the second nozzle unit 6b and the third nozzle unit 6c, and between the third nozzle unit 6c and the fourth nozzle unit. The seal plate 7 is sandwiched between the two. The seal plate 7 is made of a metal or a special material excellent in heat resistance, pressure resistance and chemical resistance in accordance with the temperature of the hot air to be used and the characteristics of the molten / melted resin. The first to fourth nozzle units 6a to 6d divided into four are integrated by fixing means 8 such as bolts passing through the whole. The split type nozzle unit 6 can be split so as to divide the melt / melt resin flow channel 10 and the hot air flow channel 12 into a plurality of each (in FIG. 3 and FIG. Are divided in the left and right direction). The split nozzle unit 6 may be configured to be split such that only one of the melt / melt resin flow channel 10 and the hot air flow channel 12 is split. The number of divisions of the divided nozzle unit 6 of the present embodiment is four. The number of divisions is determined according to the embodiment, for example, the division type nozzle unit 6 is divided according to the ease of processing of the melt / melt resin flow channel 10 and the hot air flow channel 12 and the function of the division type nozzle unit 6. It is Further, in the present embodiment, a plurality of nozzle units are coupled by fixing means 8 such as bolts shown in the figure. Besides the above, according to the configuration of each nozzle unit and the embodiment thereof, fixing means (not shown) provided on the outer periphery of each nozzle unit may be used instead of the form penetrating the whole.

Furthermore, although the discharge nozzle 2 is not illustrated in detail, it may be divided into, for example, two in the upper and lower portions depending on the ease of processing of the melt / melt resin flow channel 10 or the hot air flow channel 12 inside (FIG. 3 and FIG. 4). And the nozzle units may be divided in the vertical direction). In such a configuration, for example, the upper and lower two parts are integrally tightened by the (band type) unit heater 5 and the bolt for each nozzle unit provided with the clamping means (not shown). It is also good.

In the present embodiment, the split-type nozzle unit 6 includes a melting / melting resin inflow unit 6a as a first nozzle unit, a hot air inflow unit 6b as a second nozzle unit, and a resin / hot air introduction unit 6c as a third nozzle unit. And a discharge unit 6d as a fourth nozzle unit. In the first to fourth nozzle units 6a to 6d, melt / melt resin flow channels 10 (melt / melt resin flow channels 10a to 10d) are formed. Thus, the molten / dissolved resin discharge port located downstream of the fourth nozzle unit (ejection unit) 6 d through the molten / dissolved resin flow channel 10 is supplied with the molten / dissolved resin supply device 3. Send to 9 The melt / melt resin discharge port 9 is provided continuously to the downstream end of the melt / melt resin flow path 10.

The melting / melting resin flow path 10 is formed to be continuous from the first nozzle unit 6a to the fourth nozzle unit 6d. The melted / melted resin discharge port 9 of the fourth nozzle unit 6d is formed in a circular shape having a very small diameter on the discharge side. The diameter of the molten / melted resin discharge port 9 is determined in accordance with the specification of the extremely fine fiber shape (for example, the fiber diameter) to be manufactured. As shown in FIG. 2, the molten / melted resin discharge port 9 has a plurality of discharge ports 9-1 to 9-12 aligned in a straight line along the longitudinal direction of the slit-like hot air discharge port 11 described later (shown in FIG. In the embodiment of the present invention, a discharge port group (hereinafter referred to as “melt / melt resin discharge port groups 9-1 to 9-12”) consisting of 12 discharge ports). The molten and melted resin discharge port groups 9-1 to 9-12 are arranged in a straight line in the horizontal direction on the inclined surface 22 provided on the front wall surface 6e of the split-type nozzle unit 6 (FIG. 1). The inclined surface 22 will be described later.

As shown in FIG. 5, the molten / dissolved resin flow channel 10 is formed as a single flow channel 10 a in the first nozzle unit 6 a positioned on the most upstream side of the split-type nozzle unit 6. The melted / melted resin flow channel 10 is divided into a plurality of (four in the embodiment) flow channels 10b ... and flow channels 10c ... in the second nozzle unit 6b and the third nozzle unit 6c. ing. In the fourth nozzle unit 6d, the melt / melt resin flow channel 10 is joined again to one flow channel 10d, and then a large number (12 in the example) of flow channels (melt / melt resin discharge) It is divided into exit groups 9-1 to 9-12). The melted / melted resin discharge ports 9 (melted / melted resin discharge port groups 9-1 to 9-12) formed in the fourth nozzle unit 6d are opened (opened) in the normal direction of the inclined surface 22. ing.

As shown in FIGS. 3, 4 and 6, the hot air flow path 12 is formed in the second nozzle unit 6b to the fourth nozzle unit 6d. The hot air flow path 12 sends the hot air supplied from the hot air supply device 4 to the hot air discharge port 11 located on the downstream side of the fourth nozzle unit 6 d. The hot air flow passage 12 may be directed obliquely upward from the air reservoir portion 14 having a large volume toward one horizontally-long rectangular slit-like hot air discharge port 11 (FIG. 3), or from the air reservoir portion 14 It may be guided horizontally toward the slit-like hot air discharge port 11 (FIG. 4).

The hot air flow passage 12 is continuously formed from the second nozzle unit 6b to the fourth nozzle unit 6d. The hot air supply device 4 supplies hot air to the second nozzle unit 6 b via the hot air inlet 18. The second nozzle unit 6 b includes an air reservoir portion 14 having a predetermined large volume in order to suppress rapid pressure fluctuations in the hot air flow path 12.

As shown in FIG. 6, in the third nozzle unit 6c, a plurality of partition walls 15 (this embodiment for rectifying the heat air delivered through the air reservoir 14 of the second nozzle unit 6b in a single horizontal row) 11) are provided. Thus, in the third nozzle unit 6c, the hot air flow path 12 is divided into 12 (hot air flow paths 12-1 to 12-12). Therefore, the sent hot air is branched into a plurality of equally relatively in the third nozzle unit 6c. In the embodiment shown in FIG. 9, the hot air flow path is indicated by reference numeral 12c, and is divided into 12 (hot air flow paths 12-1 to 12-12).

As shown in FIG. 6, the fourth nozzle unit 6 d is not provided with a partition or the like in the hot air flow passage 12, and the hot air flow passage 12 (12-1 to 12-1 separated by the third nozzle unit 6 c One hot air passage space 12d communicating with 12-12) is formed. That is, as shown in FIG. 6, one rectangular parallelepiped hot air path space 12d is formed. The hot air passage space 12d is formed as a long straight straight rectangular slit-like hot air discharge port 11 with respect to the front of the apparatus, and the hot air passage space 12d is an upstream end of the fourth nozzle unit 6d. To the downstream end (hot-air outlet 11 located on the front wall of the apparatus). The hot air discharge port 11 is provided continuously to the downstream end of the hot air flow path 12.

As described above, in the hot air flow passage 12, a large number of partitions 15 for straightening the hot air and a hot air passage space 12d for collecting the hot air rectified by them are formed. That is, instead of providing one hot air discharge port for one resin discharge port, one horizontally long slit-like hot air discharge port is provided for a plurality of resin discharge ports. As a result, a uniform hot air discharge flow is formed with respect to the resin discharged from the plurality of resin discharge ports, so that uniform nanofibers can be manufactured over the entire length of the horizontally long slit.

In the embodiment shown in FIG. 6, the slit-shaped hot air discharge port 11 (discharge port of one hot air path space 12 d) of one horizontal slit is formed in the fourth nozzle unit 6 d, and the third nozzle Although a plurality of partition walls 15 are formed in the unit 6c, a configuration as shown in the modification of FIG. 9 may be employed. In the modification of FIG. 9, the partition 15 is extended and installed to the middle part of the 4th nozzle unit 6d from the 3rd nozzle unit 6c. In this configuration, the hot air passage space 12d is formed from the middle portion of the fourth nozzle unit 6d to the downstream end (a slit-like hot air discharge port 11 on the wall surface), and one horizontally long hot air passage space 12d is a device The front low vertical surface 20 is open.

The relationship between the molten / melted resin discharge port 9 and the hot air discharge port 11 will be described. As shown in FIG. 7, the front wall surface 6 e of the fourth nozzle unit 6 d has a low vertical surface 20 and a high vertical surface 21 parallel to each other. The high vertical surface 21 is disposed forward with respect to the low vertical surface 20 (displaced forward). The low vertical surface 20 and the high vertical surface 21 are connected by the inclined surface 22. The inclined surface 22 is inclined with respect to the low vertical surface 20 and the high vertical surface 21.

Then, a single rectangular slit-shaped hot air discharge port 11 is formed on the low vertical surface 20, and the molten / melted resin discharge port group 9-1 facing the normal direction of the inclined surface 22 is formed on the inclined surface 22. 9-12 (12 in this embodiment) are formed. Therefore, by adjusting the inclination angle of the inclined surface 22, the discharge direction (discharge angle) of the melted / melted resin with respect to the discharged hot air is changed. That is, by preparing a plurality of nozzle units in which the inclination angle of the inclined surface 22 is different, a nozzle unit having an inclination angle (an angle at which the molten resin and the hot air intersect with each other) according to the desired fiber diameter etc. Can be selected. In addition to the above-mentioned inclination angles, nozzle units having different diameters and numbers of molten / melted resin discharge port groups 9-1 to 9-12 and nozzle units having different configurations (such as the shape and the number of partition walls 15) of the hot air discharge port 11 May be selected.

As shown in FIG. 7 and FIG. 8, the molten / melted resin discharge port 9 and the hot air discharge port 11 are disposed at extremely close positions. The circular melt / melt resin discharge port 9 is formed in a direction (normal direction) orthogonal to the inclined surface 22. By this configuration, when processing the melt / melt resin discharge port 9 (melt / melt resin discharge port group 9-1 to 9-12), a drill is applied so as to be orthogonal to the inclined surface 22. Because the drill does not slip. Therefore, the molten and melted resin discharge port 9 can be formed into a circular shape with high accuracy even by processing such as a drill. Therefore, the melt / melt resin discharge port 9 with a small diameter can be formed with high precision.

FIG. 8 is a schematic view showing a positional relationship between a molten / melted resin discharge port and a hot air discharge port formed in a split-type nozzle attached to a nanofiber manufacturing apparatus as one embodiment of the present invention.

A fourth nozzle unit (discharge unit) 6d of the discharge nozzle 2 of the present embodiment shown in FIG. 8 is a group of melt / melt resin discharge ports 9-1 consisting of 12 discharge ports through which the melt / melt resin is discharged. A slit-like hot air discharge port 11 for discharging hot air is formed to 9-12. Further, eleven partitions 15 are provided in the third nozzle unit (resin / hot air introduction unit) 6c. Therefore, in the present embodiment, the number of the melt / melt resin discharge ports 9 (melt / melt resin discharge port groups 9-1 to 9-12) and the number of the hot air flow paths 12 (12-1 to 12-12) are different. They coincide with each other, and correspond to each other in the ejection direction (left and right direction in FIG. 8) in a one-to-one manner. Not limited to this configuration, for example, 12 partitions 15 are provided in the third nozzle unit (resin / hot air introduction unit) 6c, and 13 hot air flow paths 12 (12-1 to 12-13) are formed. It is also good. The number of the melt / melt resin discharge ports 9 (melt / melt resin discharge port groups 9-1 to 9-12) and the number of the hot air flow paths 12 (12-1 to 12-13) do not have to be the same. For example, assuming that the number of the melt / melt resin discharge ports 9 is 12 and the number of the hot air flow paths 12 in the third nozzle unit 6c is 13, they are mutually offset in the direction orthogonal to the discharge direction (vertical direction in FIG. 8) It may be arranged.

As described above, according to the discharge nozzle 2 attached to the nanofiber manufacturing apparatus 1 of the present embodiment, the melting / melting that is discharged from the molten / dissolved resin discharge port group 9-1 to 9-12 composed of a plurality of discharge ports It is possible to provide the nanofiber manufacturing apparatus 1 in which the resin is discharged into hot air discharged from a single slit-like hot air discharge port 11 and the molten / melted resin is drawn into a fibrous form. Furthermore, the discharge nozzle 2 of the present embodiment includes a melt / melt resin discharge port 9 for discharging a melt / melt resin, and the melt / melt resin discharge port 9 (melt / melt resin discharge port group 9-1 to 9- 12) A split in which a molten / melted resin flow path 10 for sending out a molten / melted resin, a hot air discharge port 11 for discharging hot air, and a hot air flow path 12 for sending hot air to the hot air discharge port 11 The die nozzle unit 6 is provided.

Furthermore, the nanofiber manufacturing apparatus 1 of the present embodiment includes a melting / dissolving resin supply device 3 for introducing a melting / dissolving resin into the melting / dissolving resin flow path 10 provided in the split-type nozzle unit 6, and the split-type nozzle unit 6 The hot air supply device 4 for introducing hot air into the hot air flow path 12 provided in the apparatus is provided, and the split-type nozzle unit 6 is configured to be divisible into first to fourth nozzle units 6a to 6d.

More specifically, the split-type nozzle unit 6 is split such that the melt / melt resin flow channel 10 and the hot air flow channel 12 are each divided into a plurality. Thus, a plurality of different nozzle units applicable to various fiber specifications can be provided in advance, and part of the nozzle units can be easily replaced according to the fiber specifications. For example, when changing the specification of the fiber to be manufactured, the fourth nozzle unit 6d in which the melting / dissolving resin discharge port 9 and the hot air discharge port 11 are formed is taken out, and melting corresponding to the changed fiber specification The fourth nozzle unit 6d in which the melted resin discharge port 9 and the hot air discharge port 11 are formed can be easily replaced. Therefore, it is possible to achieve excellent workability at the time of desired nanofiber production, to shorten the working time, and to efficiently provide fine fibers for achieving cost reduction, a nonwoven fabric made of the fibers, etc. It becomes possible.

Furthermore, in the discharge nozzle 2 of the present embodiment, molten / dissolved resin discharge port groups 9-1 to 9-12 consisting of a plurality of discharge ports are formed, and resin is discharged from the plurality of discharge ports to extend horizontally. Hot air is blown out from the hot air discharge port 11 formed as a single slit disposed. Since this is done, it is possible to equalize the amount of hot air blown out to the molten / melted resin discharged from the molten / melted resin discharge port groups 9-1 to 9-12. As a result, it is possible to suppress the unevenness in quality of the molded fibers, and to obtain high quality fibers.

Furthermore, since the divided first to fourth nozzle units 6a to 6d can be easily and integrally assembled by the fixing means 8 made of bolts or the like, the time for complicated assembly and disassembly can be shortened. As a result, the cost of the fiber produced can be kept low.

As mentioned above, although a present Example was described, this invention is not limited to the said Example, Various deformation | transformation implementation is possible within the range of the summary of this invention. In the present embodiment, the melt / melt resin flow channel 10 and the hot air flow channel 12 are formed in each of the first to fourth nozzle units 6a to 6d which can be divided into four, but these melt / melt resin flow The portion in which the passage 10 and the hot air flow passage 12 are formed may be further divided. Of course, the number of division units may be reduced.

DESCRIPTION OF SYMBOLS 1 Nanofiber manufacturing apparatus 2 Discharge nozzle 3 Melt / melt | dissolution resin supply apparatus 4 Hot-air supply apparatus 5 Heater for 6 (band type | mold) units 6 Split-type nozzle unit 6a 1st nozzle unit (melt / melt | dissolution resin inflow unit)
6b Second nozzle unit (hot air inflow unit)
6c Third nozzle unit (resin / hot air introduction unit)
6d Fourth nozzle unit (discharge unit)
6e Front wall surface 7 Seal plate 8 Fixing means 9 Melt / melt resin discharge port 9-1 to 9-12 Melt / melt resin discharge port group 10 Melt / melt resin flow path 11 Slit-shaped hot air discharge port 12 Hot air flow path (12a To 12d)
14 air reservoir portion 15 partition wall 18 hot air inlet 20 low vertical surface 21 high vertical surface 22 inclined surface

Claims (6)

A nanofiber that discharges the molten / melted resin discharged from the molten / melted resin discharge port so as to be induced by the hot air discharged from the hot air discharge port, and stretches the molten / melted resin into a fibrous form to form a fine fiber A discharge nozzle attached to a manufacturing apparatus,
A discharge nozzle attached to a nanofiber manufacturing apparatus characterized by having a split type nozzle unit which can be divided into a plurality of units, in which a melt / melt resin discharge port and a hot air discharge port are formed. The said split-type nozzle unit is divisible so that at least one of a melt | dissolution and melt | dissolution resin flow path and a hot-air flow path may be divided into plurality, It attaches to the nanofiber manufacturing apparatus of Claim 1 characterized by the above-mentioned Discharge nozzle. The discharge nozzle attached to the nanofiber manufacturing apparatus according to claim 1 or 2, wherein a seal plate for keeping the airtightness of the divided joint is interposed in the divided joint of the divided nozzle unit. . The split-type nozzle unit includes a melting / melting resin inflow unit as a first nozzle unit, a hot air inflow unit as a second nozzle unit, a resin / hot air introduction unit as a third nozzle unit, and a fourth nozzle unit And a discharge unit mounted on the nanofiber manufacturing apparatus according to claim 1. A nanofiber that discharges the molten / melted resin discharged from the molten / melted resin discharge port so as to be induced by the hot air discharged from the hot air discharge port, and stretches the molten / melted resin into a fibrous form to form a fine fiber A discharge nozzle attached to a manufacturing apparatus,
It has a split nozzle unit that can be split into multiple units,
The hot air discharge port is formed as a single rectangular slit-like hot air discharge port on the front wall surface of the split-type nozzle unit,
The melt / melt resin discharge port is a melt / melt resin discharge port group including a plurality of discharge ports arranged in a straight line, and the melt / melt resin discharge port group is formed on the front wall surface of the divided nozzle unit. Has been
A discharge nozzle attached to a nanofiber manufacturing apparatus characterized in that the molten and dissolved resin discharge port group is disposed along the longitudinal direction of the hot air discharge port. A nanofiber that discharges the molten / melted resin discharged from the molten / melted resin discharge port so as to be induced by the hot air discharged from the hot air discharge port, and stretches the molten / melted resin into a fibrous form to form a fine fiber A manufacturing device,
A discharge nozzle having a split nozzle unit which can be divided into a plurality of units;
The hot air discharge port is formed as a single rectangular slit-like hot air discharge port on the front wall surface of the split-type nozzle unit,
The melt / melt resin discharge port is a melt / melt resin discharge port group including a plurality of discharge ports arranged in a straight line, and the melt / melt resin discharge port group is formed on the front wall surface of the divided nozzle unit. Has been
The apparatus for producing nanofibers, wherein the molten and melted resin discharge port group is disposed along the longitudinal direction of the hot air discharge port.

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