Technical Field
[0001] The present invention relates to a discharge nozzle for nanofiber production apparatuses
that produce fine fibers and a nanofiber production apparatus including the discharge
nozzle.
Background Art
[0002] Nanofibers are being used in various fields thanks to the properties thereof. In
recent years, it has been requested to produce nanofibers in which fibers having different
diameters and different lengths corresponding to the application are complicatedly
intertwined, such as nonwoven fabrics formed of ultrafine fibers. Fine-fiber production
technologies are disclosed in, for example, Patent Literatures 1 and 2. Ultrafine-fiber
production apparatuses disclosed in Patent Literatures 1 and 2 include substantially
the same spinnerets for melt blowing. These ultrafine-fiber production apparatuses
include one or more liquid nozzles that are able to discharge a heated molten resin
(Patent Literature 1) or a polymer solution obtained by dissolving a raw-material
polymer in a solvent (Patent Literature 2) and one or more hot blast nozzles that
draw the molten resin or polymer solution discharged from the liquid nozzles into
fibers by blowing a hot blast onto the molten resin or polymer solution. Patent Literatures
1 and 2 disclose that the ultrafine-fiber production apparatuses stably spin the molten
resin into fine fibers using a small amount of hot blast gas.
Citation List
Patent Literature
[0003]
Patent Literature 1: Japanese Patent No. 5946569
Patent Literature 2: Japanese Patent No. 5946565
Summary of Invention
Technical Problem
[0004] However, in the case of the ultrafine-fiber production apparatuses described in Patent
Literatures 1 and 2, for example, when producing fibers having different diameters,
it is difficult to appropriately change the diameter or inclination of the liquid
nozzles or hot blast nozzles so as to correspond to the different diameters. The only
method to change such conventional liquid nozzles or hot blast nozzles is to replace
the entire spinneret.
[0005] The present invention has been made in view of the above problem, and an object thereof
is to provide a discharge nozzle for nanofiber production apparatuses that allows
for an easy change to a specification of nanofibers to be produced, such as the diameter,
and thus an improvement in apparatus variety or workability and a nanofiber production
apparatus including the discharge nozzle.
Solution to Problem
[0006] A discharge nozzle mounted on a nanofiber production apparatus according to the present
invention is a discharge nozzle mounted on a nanofiber production apparatus that draws
a molten or dissolved resin discharged from a molten/dissolved resin outlet into fine
fibers by discharging the molten/dissolved resin such that the molten or dissolved
resin is guided by a hot blast discharged from a hot blast outlet. The discharge nozzle
includes a division-type nozzle unit that is provided with a molten/dissolved resin
outlet and a hot blast outlet and can be divided into multiple units.
[0007] In the discharge nozzle mounted on the nanofiber production apparatus according to
the present invention, the division-type nozzle unit can be divided such that at least
one of the molten/dissolved resin flow path and the hot blast flow path is divided
into multiple flow paths.
[0008] In the discharge nozzle mounted on the nanofiber production apparatus according to
the present invention, a division joint of the division-type nozzle unit is an airtight
sealing plate, such as a packing structure, that is formed of a highly heat-resistant,
pressure-resistant, and chemical-resistant metal or special material corresponding
to the temperature of a hot blast to be used or the properties of the molten or dissolved
resin.
[0009] In the discharge nozzle mounted on the nanofiber production apparatus according to
the present invention, the division-type nozzle unit includes a first nozzle unit
serving as a molten/dissolved resin inflow unit, a second nozzle unit serving as a
hot blast inflow unit, a third nozzle unit serving as a resin/hot blast introduction
unit, and a fourth nozzle unit serving as a discharge unit.
[0010] A discharge nozzle mounted on a nanofiber production apparatus according to the present
invention is a discharge nozzle mounted on a nanofiber production apparatus that draws
a molten or dissolved resin discharged from a molten/dissolved resin outlet into fine
fibers by discharging the molten/dissolved resin such that the molten or dissolved
resin is guided by a hot blast discharged from a hot blast outlet. The discharge nozzle
includes a division-type nozzle unit that can be divided into multiple units. The
hot blast outlet is formed as a single rectangular slit-shaped hot blast outlet on
a front wall surface of the division-type nozzle unit. The molten/dissolved resin
outlet includes multiple aligned molten/dissolved resin outlets formed on the front
wall surface of the division-type nozzle unit and disposed along a length direction
of the hot blast outlet.
[0011] A nanofiber production apparatus according to the present invention is a nanofiber
production apparatus that draws a molten or dissolved resin discharged from a molten/dissolved
resin outlet into fine fibers by discharging the molten/dissolved resin such that
the molten or dissolved resin is guided by a hot blast discharged from a hot blast
outlet. The nanofiber production apparatus includes a discharge nozzle including a
division-type nozzle unit that can be divided into multiple units. The hot blast outlet
is formed as a single rectangular slit-shaped hot blast outlet on a front wall surface
of the division-type nozzle unit. The molten/dissolved resin outlet includes multiple
aligned molten/dissolved resin outlets formed on the front wall surface of the division-type
nozzle unit and disposed along a length direction of the hot blast outlet.
Advantageous Effects of Invention
[0012] According to the present invention, the discharge nozzle can be divided into multiple
units. Thus, when producing nanofibers having the desired diameter, some of the divided
nozzle units provided with the molten/dissolved resin outlet and hot blast outlet
can be easily replaced with units provided with a molten/dissolved resin outlet and
a hot blast outlet corresponding to the desired specification, such as the fiber diameter.
This allows for an increase in replacement workability and a reduction in the working
time, allowing for providing low-cost fine fibers and nonwoven fabrics or the like
formed of such fibers.
[0013] When producing a nonwoven fabric, a hot blast is blown from the hot blast outlet
formed as a single slit, and the molten or dissolved resin is simultaneously discharged
from the aligned multiple molten/dissolved resin outlets. This allows for optimization
of a blow of the molten or dissolved resin discharged from the molten/dissolved resin
outlets onto the hot blast, allowing for suppression of unevenness in the quality
of fibers to be formed and thus acquisition of high-quality fibers.
[0014] The divided nozzle units can be easily integrated using fixing means, such as bolts.
This allows for a reduction in the time required for troublesome assembly/disassembly
work and thus a reduction in the cost of fibers to be produced.
Brief Description of the Drawings
[0015]
FIG. 1 is a perspective view showing a division-type nozzle mounted on a nanofiber
production apparatus as an embodiment of the present invention.
FIG. 2 is an enlarged front view of the division-type nozzle in FIG. 1 and is an enlarged
view of a portion shown by an alternate long and short dashed line in FIG. 1.
FIG. 3 is a longitudinal sectional view of the division-type nozzle in FIG. 1.
FIG. 4 is a longitudinal perspective view of a division-type nozzle mounted on a nanofiber
production apparatus as another embodiment of the present invention.
FIG. 5 is a sectional view along a hot blast flow path formed in the division-type
nozzle mounted on the nanofiber production apparatus as the embodiment of the present
invention and shows an example of a sectional view taken along line A-A in FIGS. 3
and 4.
FIG. 6 is a sectional view along a solution flow path formed in the division-type
nozzle mounted on the nanofiber production apparatus as the embodiment of the present
invention and shows an example of a sectional view taken along line B-B in FIGS. 3
and 4.
FIG. 7 is a longitudinal sectional view of main components of a fourth nozzle unit
included in the division-type nozzle mounted on the nanofiber production apparatus
as the embodiment of the present invention.
FIG. 8 is a schematic view showing the position relationship between molten/dissolved
resin outlets and a hot blast outlet formed in the division-type nozzle mounted on
the nanofiber production apparatus as the embodiment of the present invention.
FIG. 9 is a sectional view showing a modification of a spinneret included in the division-type
nozzle mounted on the nanofiber production apparatus as the embodiment of the present
invention.
Description of Embodiments
[0016] Now, an embodiment of the present invention will be described with reference to FIGS.
1 to 9. However, the present invention is not limited to an implementation aspect
described in the embodiment. Addition, deletion, or design change of elements with
respect to the embodiment made by those skilled in the art as necessary and appropriate
combinations of the features of the embodiment are also included in the present invention
without departing from the spirit and scope of the present invention. In the present
specification, the term "front" refers to the left side in FIGS. 3 and 4.
[0017] Referring now to FIGS. 1 to 9, the configuration of a division-type discharge nozzle
2 mounted on a nanofiber production apparatus 1 according to the present embodiment
will be described. The nanofiber production apparatus 1 draws a molten or dissolved
resin discharged from a molten/dissolved resin outlet 9 into fine fibers by discharging
the molten or dissolved resin such that the molten or dissolved resin is guided by
a hot blast discharged from a hot blast outlet 11. The nanofiber production apparatus
1 having the discharge nozzle 2 of the present embodiment mounted thereon draws the
discharged molten resin or solvent-dissolved resin (referred to as the "molten or
dissolved resin" in the present invention) into long fibers having ultrasmall diameters
by blowing a hot blast onto the molten or dissolved resin. A molten/dissolved resin
supplier 3 (not shown in detail) that introduces the heated, molten resin or the resin
dissolved in the solvent into the discharge nozzle 2 and a hot blast supplier 4 (not
shown in detail) that introduces a hot blast into the discharge nozzle 2 are connected
to the discharge nozzle 2 mounted on the nanofiber production apparatus 1 and configured
to discharge the molten or dissolved resin.
[0018] The discharge nozzle 2 includes a division-type nozzle unit 6. The division-type
nozzle unit 6 can be divided into first to fourth nozzle units 6a to 6d. The first
to fourth nozzle units 6a to 6d are arranged sequentially from the right to the left
in FIGS. 3 and 4. Sealing plates 7 for maintaining air tightness are disposed as division
joints, which are portions adjacent to the first to fourth nozzle units 6a to 6d.
That is, the sealing plates 7 are sandwiched between the first nozzle unit 6a and
second nozzle unit 6b, between the second nozzle unit 6b and the third nozzle unit
6c, and between the third nozzle unit 6c and fourth nozzle unit. The sealing plates
7 are formed of a highly heat-resistant, pressure-resistant, and chemical-resistant
metal or special material corresponding to the temperature of a hot blast to be used
or the properties of the molten or dissolved resin. The divided four first to fourth
nozzle units 6a to 6d as a whole are penetrated by fixing means 8, such as bolts,
and thus are integrated. The division-type nozzle unit 6 can be divided (can be cut
in the up-down direction into nozzle units arranged in the left-right direction in
FIGS. 3 and 4) such that a molten/dissolved resin flow path 10 and a hot blast flow
path 12 are each divided into multiple flow paths. The division-type nozzle unit 6
may be dividable such that only one of the molten/dissolved resin flow path 10 and
hot blast flow path 12 is divided. The number of divisions of the division-type nozzle
unit 6 of the present embodiment is four. The number of divisions of the division-type
nozzle unit 6 is determined in accordance with the implementation aspect. For example,
the division-type nozzle unit 6 is divided d into a number of units corresponding
to ease of formation of the molten/dissolved resin flow path 10 and hot blast flow
path 12 or corresponding to the number of the functions of the division-type nozzle
unit 6. In the present embodiment, the multiple nozzle units are jointed together
using the shown fixing means 8, such as bolts. Alternatively, rather than penetrating
the nozzle units, fixing means (not shown) may be disposed on the peripheries of the
nozzle units in accordance with the configuration of the nozzle units and the implementation
aspect thereof.
[0019] Depending on ease of formation of the internal molten/dissolved resin flow path 10
or hot blast flow path 12, the discharge nozzle 2 may be divided, for example, in
the up-down direction (may be cut in the left-right direction so that nozzle units
are arranged in the up-down direction in FIGS. 3 and 4) (not shown in detail). In
such a configuration, for example, the nozzle units adjacent to each other in the
up-down direction may be integrally fastened using (band-type) heaters for the nozzle
units provided with fastening means (not shown), as well as bolts.
[0020] In the present embodiment, the division-type nozzle unit 6 includes the first nozzle
unit 6a serving as a molten or dissolved resin inflow unit, the second nozzle unit
6b serving as a hot blast inflow unit, the third nozzle unit 6c serving as a resin/hot
blast introduction unit, and the fourth nozzle unit 6d serving as a discharge unit.
The first to fourth nozzle units 6a to 6d are provided with the molten/dissolved resin
flow path 10 (molten/dissolved resin flow paths 10a to 10d). Thus, the molten or dissolved
resin supplied from the molten/dissolved resin supplier 3 is sent to the molten/dissolved
resin outlet 9 located on the downstream side of the fourth nozzle unit (discharge
unit) 6d through the molten/dissolved resin flow path 10. The molten/dissolved resin
outlet 9 is disposed so as to communicate with the downstream end of the molten/dissolved
resin flow path 10.
[0021] The molten/dissolved resin flow path 10 is formed continuously over the first to
fourth nozzle units 6a to 6d. The molten/dissolved resin outlet 9 of the fourth nozzle
unit 6d is in the shape of a circle having an extremely small discharge-side diameter.
The diameter of the molten/dissolved resin outlet 9 is determined in accordance with
the specification of the shape (e.g., diameter) of ultrafine fibers to be produced.
As shown in FIG. 2, the molten/dissolved resin outlet 9 includes multiple (12 in the
shown embodiment) outlets 9-1 to 9-12 (hereafter referred to as the "molten/dissolved
resin outlets 9-1 to 9-12") aligned along the length direction of a slit-shaped hot
blast outlet 11 (to be discussed later). The molten/dissolved resin outlets 9-1 to
9-12 are horizontally aligned with each other on an inclined surface 22 disposed on
the front wall surface 6e of the division-type nozzle unit 6 (FIG. 1). The inclined
surface 22 will be described later.
[0022] As shown in FIG. 5, the molten/dissolved resin flow path 10 is formed as the single
flow path 10a in the first nozzle unit 6a located on the most upstream side of the
division-type nozzle unit 6. The flow path 10a is divided into the multiple (four
in the embodiment) flow paths 10b and flow paths 10c in the second nozzle unit 6b
and third nozzle unit 6c. The flow paths 10c are again merged into the single flow
path 10d in the fourth nozzle unit 6d, which is then divided into multiple (12 in
the embodiment) flow paths (molten/dissolved resin outlets 9-1 to 9-12) therein. The
molten/dissolved resin outlet 9 (molten/dissolved resin outlets 9-1 to 9-12) formed
in the fourth nozzle unit 6d is open in the direction of the normal to the inclined
surface 22.
[0023] As shown in FIGS. 3, 4, and 6, the hot blast flow path 12 is formed in the second
to fourth nozzle units 6b to 6d. The hot blast flow path 12 sends a hot blast supplied
from the hot blast supplier 4 to the hot blast outlet 11 located on the downstream
side of the fourth nozzle unit 6d. The hot blast flow path 12 may guide a hot blast
from an air storage 14 having a large volume to the single horizontally rectangular,
slit-shaped hot blast outlet 11 obliquely upward (FIG. 3), or guide a hot blast from
the air storage 14 to the slit-shaped hot blast outlet 11 horizontally (FIG. 4).
[0024] The hot blast flow path 12 is formed continuously over the second to fourth nozzle
units 6b to 6d. The hot blast supplier 4 supplies a hot blast to the second nozzle
unit 6b through a hot blast inlet 18. To suppress a sudden pressure variation in the
hot blast flow path 12, the second nozzle unit 6b includes the air storage 14 having
a predetermined large volume.
[0025] As shown in FIG. 6, the third nozzle unit 6c is provided with horizontal multiple
(11 in the present embodiment) partitions 15 for rectifying a hot blast sent through
the air storage 14 of the second nozzle unit 6b. Thus, the hot blast flow path 12
is divided into 12 flow paths (hot blast flow paths 12-1 to 12-12) in the third nozzle
unit 6c. As a result, the sent hot blast is relatively equally divided to multiple
hot blasts in the third nozzle unit 6c. In the embodiment shown in FIG. 9, the hot
blast flow path is represented by a reference numeral 12c and is divided into 12 flow
paths (hot blast flow paths 12-1 to 12-12).
[0026] As shown in FIG. 6, the hot blast flow path 12 of the fourth nozzle unit 6d is not
provided with any partition or the like but rather provided with a single rectangular-parallelepiped
hot blast path space 12d that communicates with the divided hot blast flow paths 12
(12-1 to 12-12) in the third nozzle unit 6c. The hot blast path space 12d forms the
horizontally rectangular, slit-shaped hot blast outlet 11 on the front surface of
the apparatus. The hot blast path space 12d is formed from the upstream end to the
downstream end (the hot blast outlet 11 on the front wall surface of the apparatus)
of the fourth nozzle unit 6d. The hot blast outlet 11 is disposed so as to communicate
with the downstream end of the hot blast flow path 12.
[0027] As seen above, the hot blast flow path 12 is provided with the many partitions 15
for rectifying a hot blast and the single hot blast path space 12d for merging the
hot blasts rectified by the partitions 15. That is, the single horizontally rectangular,
slit-shaped hot blast outlet is provided with respect to the multiple resin outlets
rather than providing one hot blast outlet with respect to one resin outlet. Thus,
a uniform hot blast discharge flow is formed with respect to the resin discharged
from the multiple resin outlets, allowing for production of uniform nanofibers over
the entire length of the horizontally rectangular slit.
[0028] While, in the embodiment shown in FIG. 6, the fourth nozzle unit 6d is provided with
the single horizontally rectangular, slit-shaped hot blast outlet 11 (the outlet of
the single hot blast path space 12d) and the third nozzle unit 6c is provided with
the multiple partitions 15, a modification as shown in FIG. 9 may be employed. In
the modification in FIG. 9, partitions 15 are disposed so as to extend from a third
nozzle unit 6c approximately to the middle portion of a fourth nozzle unit 6d. In
this configuration, a single horizontally rectangular hot blast path space 12d is
formed from the middle portion to the downstream end (a slit-shaped hot blast outlet
11 on the wall surface) of the fourth nozzle unit 6d and is open to a lower vertical
surface 20 on the front side of the apparatus.
[0029] The relationship between the molten/dissolved resin outlet 9 and hot blast outlet
11 will be described. As shown in FIG. 7, the front wall surface 6e of the fourth
nozzle unit 6d has the lower vertical surface 20 and an upper vertical surface 21
that are parallel with each other. The upper vertical surface 21 is disposed in a
more front position than the lower vertical surface 20 (is displaced from the lower
vertical surface 20 forward). The lower vertical surface 20 and upper vertical surface
21 are connected through the inclined surface 22. The inclined surface 22 is inclined
with respect to the lower vertical surface 20 and upper vertical surface 21.
[0030] The lower vertical surface 20 is provided with the single rectangular slit-shaped
hot blast outlet 11. The inclined surface 22 is provided with the molten/dissolved
resin outlets 9-1 to 9-12 (12 outlets in the present embodiment) oriented in the direction
of the normal to the inclined surface 22. Accordingly, by adjusting the inclination
angle of the inclined surface 22, the direction (angle) of discharge of the molten
or dissolved resin with respect to the discharged hot blast is changed. That is, if
multiple nozzle units having inclined surfaces 22 having different inclination angles
are prepared, a nozzle unit having an inclination angle (the angle at which the molten
or dissolved resin and a hot blast intersect each other) corresponding to a desired
specification, such as the fiber diameter, can be selected. Instead of a nozzle unit
having a different inclined angle, a nozzle unit having molten/dissolved resin outlets
9-1 to 9-12 having a different diameter, a nozzle unit having a different number of
molten/dissolved resin outlets, or a nozzle unit having a hot blast outlet 11 having
a different configuration (the shape, the number of partitions 15, etc.) may be selected.
[0031] As shown in FIGS. 7 and 8, the molten/dissolved resin outlet 9 and hot blast outlet
11 are disposed in extremely close positions. The circular molten/dissolved resin
outlet 9 is formed in a direction perpendicular to the inclined surface 22 (in the
direction of the normal). According to this configuration, when forming the molten/dissolved
resin outlet 9 (molten/dissolved resin outlets 9-1 to 9-12), a drill is applied to
the inclined surface 22 so as to be perpendicular thereto and thus does not slip away.
As a result, the small-diameter circular molten/dissolved resin outlet 9 can be accurately
formed even using a drill or the like.
[0032] FIG. 8 is a schematic view showing the position relationship between the molten/dissolved
resin outlet and the hot blast outlet formed in the division-type nozzle mounted on
the nanofiber production apparatus according to the embodiment of the present invention.
[0033] The fourth nozzle unit (discharge unit) 6d of the discharge nozzle 2 of the present
embodiment shown in FIG. 8 is provided with the 12 molten/dissolved resin outlets
9-1 to 9-12 from which the molten or dissolved resin is discharged and the single
slit-shaped hot blast outlet 11 from which a hot blast is discharged. The third nozzle
unit (resin/hot blast introduction unit) 6c is provided with the 11 partitions 15.
Thus, in the present embodiment, the molten/dissolved resin outlets 9 (molten/dissolved
resin outlets 9-1 to 9-12) and the hot blast flow paths 12 (12-1 to 12-12) match each
other in number and correspond to each other one-to-one in the discharge direction
(the left-right direction in FIG. 8). Instead of this configuration, for example,
the third nozzle unit (resin/hot blast introduction unit) 6c may be provided with
12 partitions 15, and the fourth nozzle unit 6d may be provided with 13 hot blast
flow paths 12 (12-1 to 12-13). The molten/dissolved resin outlets 9 (molten/dissolved
resin outlets 9-1 to 9-12) and the hot blast flow paths 12 (12-1 to 12-13) need not
necessarily match each other in number. For example, 12 molten/dissolved resin outlets
9 and 13 hot blast flow paths 12 of the third nozzle unit 6c may be displaced from
each other in a direction perpendicular to the discharge direction (in the up-down
direction in FIG. 8).
[0034] As seen above, by mounting the discharge nozzle 2 of the present embodiment on the
nanofiber production apparatus 1, the nanofiber production apparatus 1 is allowed
to draw the molten or dissolved resin discharged from the multiple molten/dissolved
resin outlets 9-1 to 9-12 into fibers by discharging the molten or dissolved resin
onto a hot blast discharged from the single slit-shaped hot blast outlet 11. The discharge
nozzle 2 of the present embodiment includes the division-type nozzle unit 6 that is
provided with the molten/dissolved resin outlet 9 from which the molten or dissolved
resin is discharged, the molten/dissolved resin flow path 10 through which the molten
or dissolved resin is sent to the molten/dissolved resin outlet 9 (molten/dissolved
resin outlets 9-1 to 9-12), the hot blast outlet 11 from which a hot blast is discharged,
and the hot blast flow path 12 through which a hot blast is sent to the hot blast
outlet 11.
[0035] The nanofiber production apparatus 1 of the present embodiment includes the molten/dissolved
resin supplier 3 that introduces the molten or dissolved resin into the molten/dissolved
resin flow path 10 disposed in the division-type nozzle unit 6 and the hot blast supplier
4 that introduces a hot blast into the hot blast flow path 12 disposed in the division-type
nozzle unit 6. The division-type nozzle unit 6 can be divided into first to fourth
nozzle units 6a to 6d.
[0036] More specifically, the division-type nozzle unit 6 is divided such that the molten/dissolved
resin flow path 10 and hot blast flow path 12 are each divided into multiple flow
paths. Thus, if multiple different nozzle units that can be applied to different fiber
specifications are prepared, some of the nozzle units can be easily replaced in accordance
with the target fiber specification. For example, when changing a specification of
fibers to be produced, the fourth nozzle unit 6d provided with the molten/dissolved
resin outlet 9 and hot blast outlet 11 can be easily replaced with a fourth nozzle
unit 6d provided with a molten/dissolved resin outlet 9 and a hot blast outlet 11
corresponding to the changed fiber specification. This allows for an increase in the
workability and a reduction in the working time when producing the desired nanofibers,
allowing for efficiently providing low-cost fine fibers and nonwoven fabrics or the
like formed of such fibers.
[0037] The discharge nozzle 2 of the present embodiment is provided with the multiple molten/dissolved
resin outlets 9-1 to 9-12, and discharges a resin from the outlets and blows a hot
blast through the hot blast outlet 11 formed as a single horizontally rectangular
slit. This allows for making uniform the amount of hot blast blown onto the molten
or dissolved resin discharged from the molten/dissolved resin outlets 9-1 to 9-12,
allowing for suppression of unevenness in the quality of fibers to be formed and thus
acquisition of high-quality fibers.
[0038] The divided first to fourth nozzle units 6a to 6d can be easily integrated using
the fixing means 8, such as bolts. This allows for a reduction in the time required
for troublesome assembly/disassembly work and thus a reduction in the cost of fibers
to be produced.
[0039] While the embodiment of the present invention has been described, the present invention
is not limited thereto. Various modifications can be made to the embodiment without
departing from the spirit and scope of the present invention. While, in the above
embodiment, the four divided first to fourth nozzle units 6a to 6d are each provided
with the molten/dissolved resin flow path 10 and hot blast flow path 12, the portions
in which the molten/dissolved resin flow path 10 and hot blast flow path 12 are formed
may be further dividable. Of course, the number of divided nozzle units may be reduced.
Reference Signs List
[0040]
- 1
- nanofiber production apparatus
- 2
- discharge nozzle
- 3
- molten/dissolved resin supplier
- 4
- hot blast supplier
- 5
- (band-type) heater for nozzle unit
- 6
- division-type nozzle unit
- 6a
- first nozzle unit (molten/dissolved resin inflow unit)
- 6b
- second nozzle unit (hot blast inflow unit)
- 6c
- third nozzle unit (resin/hot blast introduction unit)
- 6d
- fourth nozzle unit (discharge unit)
- 6e
- front wall surface
- 7
- sealing plate
- 8
- fixing means
- 9
- molten/dissolved resin outlet
- 9-1 to 9-12
- molten/dissolved resin outlet
- 10
- molten/dissolved resin flow path
- 11
- slit-shaped hot blast outlet
- 12
- hot blast flow path (12a to 12d)
- 14
- air storage
- 15
- partition
- 18
- hot blast inlet
- 20
- lower vertical surface
- 21
- upper vertical surface
- 22
- inclined surface
1. A discharge nozzle mounted on a nanofiber production apparatus that draws a molten
or dissolved resin discharged from a molten/dissolved resin outlet into fine fibers
by discharging the molten/dissolved resin such that the molten or dissolved resin
is guided by a hot blast discharged from a hot blast outlet, the discharge nozzle
comprising
a division-type nozzle unit that is provided with a molten/dissolved resin outlet
and a hot blast outlet and can be divided into a plurality of units.
2. The discharge nozzle mounted on the nanofiber production apparatus according to Claim
1, wherein the division-type nozzle unit can be divided such that at least one of
the molten/dissolved resin flow path and the hot blast flow path is divided into a
plurality of flow paths.
3. The discharge nozzle mounted on the nanofiber production apparatus according to Claim
1 or 2, wherein a division joint of the division-type nozzle unit is an airtight sealing
plate.
4. The discharge nozzle mounted on the nanofiber production apparatus according to Claim
1, wherein the division-type nozzle unit comprises a first nozzle unit serving as
a molten/dissolved resin inflow unit, a second nozzle unit serving as a hot blast
inflow unit, a third nozzle unit serving as a resin/hot blast introduction unit, and
a fourth nozzle unit serving as a discharge unit.
5. A discharge nozzle mounted on a nanofiber production apparatus that draws a molten
or dissolved resin discharged from a molten/dissolved resin outlet into fine fibers
by discharging the molten/dissolved resin such that the molten or dissolved resin
is guided by a hot blast discharged from a hot blast outlet, the discharge nozzle
comprising
a division-type nozzle unit that can be divided into a plurality of units, wherein
the hot blast outlet is formed as a single rectangular slit-shaped hot blast outlet
on a front wall surface of the division-type nozzle unit, and
the molten/dissolved resin outlet comprises a plurality of aligned molten/dissolved
resin outlets formed on the front wall surface of the division-type nozzle unit and
disposed along a length direction of the hot blast outlet.
6. A nanofiber production apparatus that draws a molten or dissolved resin discharged
from a molten/dissolved resin outlet into fine fibers by discharging the molten/dissolved
resin such that the molten or dissolved resin is guided by a hot blast discharged
from a hot blast outlet, the nanofiber production apparatus comprising
a discharge nozzle comprising a division-type nozzle unit that can be divided into
a plurality of units, wherein
the hot blast outlet is formed as a single rectangular slit-shaped hot blast outlet
on a front wall surface of the division-type nozzle unit, and
the molten/dissolved resin outlet comprises a plurality of aligned molten/dissolved
resin outlets formed on the front wall surface of the division-type nozzle unit and
disposed along a length direction of the hot blast outlet.