TW201702443A - Apparatus and method for producing nanofiber - Google Patents

Abstract

An object of the present invention is to provide an apparatus and method for producing a nanofiber by using a melt blown method improving productivity. A pellet-shaped raw material (resin) fed into a hopper 2 is supplied and melted in a heating cylinder 3 heated by a heater 4, and sent to a front part of the heating cylinder 3 by a screw 5 rotated by a motor 6. The heating cylinder 3 is provided with a head portion 7, and a high-pressure gas is ejected from the gas ejection hole 71 provided at a center of the head portion 7. The melted resin sent to an end of the heating cylinder 3 is discharged from a resin discharging hole 73 having six superfine tubes provided in a downstream side of the resin ejection hole 73 through inside of the head portion 7. The melted resin discharged from the resin discharge hole 73 is elongated and a fiber having nanometer-order diameter can be formed.

Description

Nanofiber manufacturing device and nanofiber manufacturing method

The present invention relates to a nanofiber manufacturing apparatus and a nanofiber manufacturing method capable of providing high quality nanofibers by a simple structure.

In recent years, with the expansion of the use of nano-diameter fibers and so-called nanofibers, demand has rapidly increased. As its use expands, nanofibers require special nanofibers of higher quality and corresponding to their use. Further, various known methods such as an electrospinning method and a melt-blown method are known for the production of nanofibers, and there are advantages and disadvantages in each method.

As a background art described above, Patent Document 1 discloses a method of producing a nonwoven fabric comprising a plurality of types of fibers in which a solution is discharged into a melt-blown fiber. Specifically, the solution discharge fiber is mixed into a fiber flow of the melt blown fiber discharged from the nozzle by a melt blow method, wherein the solution discharge fiber is discharged from the gas by the spinning solution discharged from the liquid discharge portion. The portion of the spun gas is ejected by the solution spinning means to discharge the spinning solution and fibrillate.

Further, Non-Patent Document 1 discloses a content of a method for producing a nanofiber based on an electrospinning method. In the non-patent document 1, it is disclosed that the production of nanofibers in the electrospinning method in which a resin is required for swelling by a resin is used to prevent ignition and explosion when using a solvent by using a solvent without using a solvent. The composition and so on. Further, the defects of the method for manufacturing a nanofiber based on the melt blow method are also described in detail.

Patent Document 1: Japanese Patent Publication No. 2010-185153

Non-Patent Document 1: WEB-Journal No. 151 Non-woven Supplemental Supplement (http://www.webj.co.jp/index.html)

As described in the above-mentioned Non-Patent Document 1, in order to reduce the fiber diameter in the method for producing a nanofiber based on the conventional melt blow method, a method of ejecting high-temperature air at a high speed and suppressing discharge of a polymer can be considered. In the lower method, when the high-temperature air is ejected at a high speed, the diameter of the fiber is reduced, but the length of the fiber is shortened to be zero-grained, and on the other hand, when the discharge of the polymer is suppressed to be low, the per unit time is caused. The production volume is significantly reduced, and it is difficult to mass produce good quality nanofibers under any circumstances. On the other hand, in the electrospinning method, although the productivity is improved, the apparatus is complicated, and it is necessary to cope with the countermeasures of the ignition and the explosion, and thus the manufacturing cost is increased.

The present invention has been made in view of the above problems, and an object thereof is to provide a melt blown method. In the nanofiber manufacturing method, a nanofiber having a good quality can be supplied in a large amount, and a nanofiber manufacturing method and a nanofiber manufacturing apparatus which can improve safety by further eliminating the cause of ignition or explosion can be further eliminated.

The nanofiber manufacturing apparatus of the present invention is a nanofiber manufacturing apparatus including a liquid material discharging means for discharging a liquid material from a high-pressure gas stream discharged from a high-pressure gas discharging means, wherein the liquid material discharging means is from the foregoing A plurality of high-pressure gas streams ejected by the high-pressure gas ejecting means are disposed in the center.

Further, in the nanofiber manufacturing apparatus of the present invention, the liquid material discharging means includes an extrusion means for melting and extruding the raw material.

Further, in the nanofiber manufacturing apparatus of the present invention, the liquid material discharging means includes means for supplying a melting material.

Further, in the nanofiber manufacturing apparatus of the present invention, the high pressure gas discharge means is provided with a gas supply means for supplying a high-pressure and high-temperature gas, and the high-pressure gas discharge means discharges a high-temperature gas at a high pressure.

Further, the nanofiber manufacturing apparatus of the present invention includes an installation angle capable of adjusting the liquid material discharging means for the high-pressure air stream ejected from the high-pressure gas ejecting means. Angle adjustment means.

Further, in the nanofiber manufacturing apparatus of the present invention, at least two or more of the liquid material discharging means are disposed symmetrically with respect to the high pressure gas discharging means.

Further, in the nanofiber manufacturing apparatus of the present invention, the liquid material discharging means is disposed at equal intervals around the high-pressure air stream ejected from the high-pressure gas ejecting means.

Further, in the nanofiber manufacturing apparatus of the present invention, the high pressure gas stream ejected from the high pressure gas ejecting means is disposed in a direction perpendicular to the installation surface of the nanofiber manufacturing apparatus.

The method for producing a nanofiber according to the present invention is a method for producing a nanofiber in which a liquid material is discharged from a liquid material discharge means with respect to a high-pressure gas stream discharged from a high-pressure gas discharge means to produce a nanofiber. When a plurality of the liquid material discharging means are disposed to discharge the liquid material from the high-pressure gas stream ejected from the high-pressure gas ejecting means, the liquid material is discharged from the liquid material discharging means to the high-pressure air stream. The angle of spit of raw materials.

Further, the nanofiber manufacturing method of the present invention is a nanofiber manufacturing method using a nanofiber manufacturing apparatus including a heating cylinder to which a raw material is supplied, a heating means for heating the heating cylinder, and a heating means in the heating cylinder An extrusion device for extruding a raw material, wherein in the method, a gas discharge port for injecting a high-pressure gas is provided at an end of the heating cylinder, A plurality of raw material discharge means for discharging the raw material which is in a molten state in the heating cylinder are provided around the discharge port, and the heating cylinder is heated by the heating means to melt or maintain the raw material supplied to the inside of the heating cylinder. In the molten state, the raw material is discharged from the raw material discharge means by the extrusion device, and a gas stream is generated from the gas injected from the gas discharge port, and the discharge raw material is charged from the outer circumference to the gas flow of the discharge gas. Fibers that are elongated and formed into nanometer diameters.

According to the present invention, it is possible to safely manufacture nanofibers having a smaller diameter and higher quality. Further, in the production of the nanofibers, it is possible to compensate for the throughput per unit time which is a defect based on the melt blow method by providing a plurality of resin discharge means without using a device using a high voltage.

The form for carrying out the invention will be described below. Needless to say, the present invention can be easily applied to components other than the configuration described in the embodiment without departing from the scope of the invention.

In the present invention, a liquid material is supplied to a liquid material (a gas-like fluid is preferably used) to form a nanofiber. However, in the specification of the present application, when the composition is not specifically specified, it is called "gas". Contains gases consisting of all constituents or molecular structures. In the specification of the present application, the term "raw material" refers to all materials in the case of forming a nanofiber. In the following examples, an example in which a synthetic resin is used as a "raw material" will be described, but the invention is not limited thereto. Various constituent materials can be used. Moreover, in the specification of the present application, the term "liquid raw material" is not limited to the raw material. The trait of being a liquid is a "melting raw material" used in Example 1 in which a solid raw material is melted and extruded by an extrusion device to form a nanofiber, and is included in a predetermined melting solution to be solidified in advance. The raw material or the liquid material is a predetermined concentration, and is applied to a "melting material" used in Example 2 by a suitable means, which is sent out from a discharge port or extruded to form a nanofiber. In other words, the "liquid raw material" in the present invention means a viscous property which is required to be capable of supplying (discharging and discharging) "raw material" from a supply port (a discharge port or a discharge port), and is in the present invention. The "raw material" having such a liquid property is referred to as "liquid raw material".

The details of the basic invention of the nanofiber manufacturing apparatus and the nanofiber manufacturing method described in the first and second embodiments of the present invention are as shown in Fig. 11, and the high pressure gas is provided at the center. The discharge means 71 can change the installation angle of the plurality of discharge means 73a for discharging the liquid raw material around the high-pressure gas stream 90 discharged from the high-pressure gas discharge means 71. That is, the supply angle θ of the liquid material relative to the high pressure gas stream 90 can be changed. In the basic concept of the present invention, as shown in Fig. 11, the discharge means 73a for discharging the liquid material is disposed at a supply angle θ with respect to the center line 91 of the high-pressure air stream 90, and the discharged liquid material is discharged from a plurality of discharge means 73a. It is disposed toward the center line 91 of the high pressure airflow 90. It is preferable to discharge the liquid material to be discharged from the plurality of discharge means 73a so as to intersect the center line 91.

In Fig. 11, the arrangement state of each constituent element is as above, and the positional relationship is as follows. When the position of the gas discharge port 71 (opening nozzle) of the high-pressure gas is used as a reference, and then the positional relationship is further described on the downstream side, a is discharged from the raw material of the discharge port of the discharge means 73a. The port receding distance, b is the retreat distance from the discharge port of the discharge port 73a, and c is the opening diameter of the discharge port of the discharge means 73a, and d is the gas discharge port gap.

Here, it is assumed that the discharge means 73a for discharging the liquid raw material is disposed at the supply angle θ with respect to the center line 91 of the high-pressure airflow 90, and the raw material supply tangent angle is represented by tan θ = d / (ba) (1). θ can be adjusted within a range of 0° < θ < 90°. As an example, when the raw material discharge port retreat distance a=30 mm, the discharge port opening diameter c=2 mm, the gas discharge port gap d=7 mm, and the pressure at which the high pressure gas is discharged is about 0.15 MPa, θ=20°±10° is desirable.

In this way, the raw material supply tangent angle θ should be determined by the raw material discharge port retreat distance a, the discharge material intersection position retreat distance b, and the gas discharge port gap d, and the high-pressure gas discharge port opening diameter c and the discharge high pressure should be The relationship between the pressure of the gas and the temperature is determined.

In the nanofiber manufacturing apparatus and the nanofiber manufacturing method according to the first embodiment of the present invention, the particulate raw material (resin) charged in the hopper is supplied to a heating cylinder heated by a heater to be melted, and borrowed. It is sent out to the front of the heating cylinder by a screw that is rotated by a motor. A head is provided on the heating cylinder, and high-pressure gas is ejected from a gas discharge port formed at the center of the head. The liquid molten raw material (molten resin) that has reached the front end of the heating cylinder is supplied from a liquid molten raw material (molten resin) of a plurality of ultrafine tubes disposed on the downstream side of the gas discharge means through the inside of the head ( The spitting means is supplied (spit). The liquid molten raw material discharge means of the plurality of extremely thin tubes is uniformly disposed around the gas discharge port disposed at the center. Thereby, the molten resin discharged from the liquid molten raw material discharge means is stretched to form a fiber having a nanometer diameter.

In the nanofiber manufacturing apparatus and the nanofiber manufacturing method of the second embodiment of the present invention, the high-pressure gas is ejected from the gas ejection port formed at the center, and is disposed from the liquid-dissolving material discharging means. The liquid-melting raw material discharge means of the plurality of ultrafine tubes on the downstream side discharges the high-pressure gas.

(Example 1)

Hereinafter, the overall configuration of the nanofiber manufacturing apparatus in the first embodiment of the present invention will be described with reference to Figs. 1 to 3 .

In the first embodiment of the present invention, the nanofiber manufacturing apparatus 1 shown in Fig. 1 has a hopper 2 for putting a resin (fine particle size granular synthetic resin) as a material of nanofibers into the nanometer. In the fiber manufacturing apparatus 1, the heating cylinder 3 receives the supply of the resin from the hopper 2 and heat-melts it; the heater 4 serves as a heating means for heating the heating cylinder from the outside; and the screw 5 is rotatably accommodated in the heating. In the cylinder 3, as an extrusion device for moving the molten resin to the tip end of the heating cylinder 3 by rotation, the motor 6 is a driving means for rotating the screw 5 via the coupling portion 61 (not shown in detail) And a cylindrical head portion 7 provided at the front end of the heating cylinder 3, and having a resin discharge means for discharging a molten resin to be described later from the periphery, and a gas spray for ejecting a gaseous hot air from the center portion. Outlet 71 (open nozzle). In order to eject the injection gas from the center portion, the cylindrical head portion 7 supplies high-pressure gas via a pipe 81 connected to the gas pipe portion 8 as a gas supply pipe. The gas piping unit 8 is provided with a heating means (not shown) such as a heater, and is configured to be sprayed from the gas discharge port 71 (open nozzle). Shoot hot air. Further, the head portion 7 and the heating cylinder 3 are connected via a sheet portion 9 such as an O-ring or a ring-shaped sheet member, and have a configuration in which molten resin does not leak out of the apparatus.

The plurality of heaters 4 disposed on the outer circumference of the heating cylinder 3 are configured by control means (not shown) so that temperature control can be performed independently or collectively. In the present embodiment, as shown in Fig. 1, four heaters 4 are provided. However, the present invention is not limited thereto, and the diameter or length of the heating cylinder 3 may be different depending on the material or property of the resin to be used. Wait for a number of conditions to change the number of settings, or change the size of each heater, or change the configuration conditions appropriately.

Fig. 2 is a plan view of the nanofiber manufacturing apparatus 1 of the present embodiment, and Fig. 3 is a front view. 4 to 6 are explanatory views showing the configuration of the head 7.

As shown in FIG. 3, in the head portion 7 which is an embodiment of the present invention, a duct 81 for supplying a high-pressure gas is connected from the outer circumference of the heating cylinder 3 via the gas piping portion 8. The high-pressure gas from the pipe 81 is introduced into the inside of the head portion 7 and is ejected from the gas discharge port 71 (opening nozzle: Fig. 3) formed at the center portion. A plurality of resin discharge means 73 are disposed at equal intervals around the gas discharge port 71. In the present embodiment, the resin discharge means 73 is constituted by a resin discharge needle attachment portion 73b having a resin discharge needle 73a and a structure in which the resin discharge needle 73a is attached to the head portion 7.

The head portion 7 shown in Fig. 3 includes a heating cylinder cover portion 77 that covers the front end portion of the heating cylinder 3, and a resin discharge means holding ring portion 78 as a means for holding the resin discharge means 73. Resin spit out The segment holding ring portion 78 is fixed to the heating cylinder cover portion 77 by a fixing means (unsigned) such as a bolt.

When a plurality of resin discharge means 73 are disposed around the gas discharge port 71 (opening nozzle) by the resin discharge means holding ring portion 78, a plurality of resin discharge means 73 are equally spaced and equidistant (from the gas discharge port) The distance a), or an equal angle (discharge angle θ) is set, whereby the production amount of the nanofiber having a uniform diameter and a fiber length can be greatly improved.

Here, the arrangement relationship between the gas discharge port 71 (opening nozzle) and the resin discharge means 73 disposed in the periphery will be described with reference to FIG. The airflow 90 ejected from the gas discharge port 71 disposed at the center of the head portion 7 is ejected. In the air flow 90, a plurality of resin discharge means 73 are disposed around the resin discharge port 73a as a resin discharge port, and the air flow 90 discharged from the discharge port 71 by the discharge angle θ is discharged. The resin discharge port of the resin discharge needle 73a is disposed in front of the distance a from the discharge port 71 (downstream side along the air flow 90 from the discharge port 71). Each of the resin discharge ports of the plurality of resin discharge needles 73a is discharged so that the discharge resin crosses the front side of the distance b from the discharge port 71 (the downstream side when the air flow 90 from the discharge port 71 is downstream).

By changing the number, arrangement interval, arrangement distance (distance a from the gas discharge port), and arrangement angle (θ) of the resin discharge means 73 as the arrangement conditions of the plurality of resin discharge means 73, it is also possible to form a non-uniform diameter. Or nanofibers of fiber length. Therefore, the arrangement bar such as the arrangement interval of the resin discharge means 73 is appropriately selected and changed depending on the use of the manufactured nanofibers. You can do it.

Fig. 4 is a cross-sectional view taken along line AA of the head portion 7 of Fig. 3, and Fig. 5(a), Fig. 5(b), and Fig. 5(c) show main parts of the head portion 7 of Fig. 4. Cross-sectional views at (BB section, CC section, DD section). In addition, Fig. 6 is an explanatory view showing a flow path A of the high pressure gas and a flow path B of the molten resin. As shown in FIGS. 4 to 6 , six resin flow paths 75 (arrow B in the drawing) corresponding to the resin discharge means 73 are formed at equal intervals inside the head portion 7. The resin discharge means 73 is connected to the heating cylinder 3 via the resin flow path 75. The molten resin extruded by the rotation of the screw 5 flows into the resin flow path 75 shown in the DD sectional view of Fig. 5(c), and flows through the resin flow path 75 shown in the CC sectional view, and flows into the BB sectional view. The resin is discharged from the inside of the needle attachment portion 73b, and is discharged from the resin discharge needle 73a. At this time, as shown in Fig. 4, the gas flow path 72 (arrow A in the figure) is formed in the center of the head portion 7 so as not to interfere with the resin flow path 75 (arrow B in the figure), as shown in Fig. 5. The CC cross-sectional view of (b) is formed by passing between the adjacent resin flow paths 75 and changing directions from the outer side toward the inner side of the head portion 7. The gas piping portion 8 is connected to the gas flow path 72 via the pipe 81. Through the gas flow path 72 thus formed, the high-pressure and high-temperature gas supplied by the gas injection unit 8 is ejected from the gas discharge port 71 (open nozzle). In this manner, the resin flow path 75 and the gas flow path 72 are formed without interfering with each other in the head portion 7. Further, reference numeral 79 in Fig. 7(b) is a screw portion 79 when the duct (gas flow path) 81 is attached to the heating cylinder cover portion 77.

In order to adjust the arrangement condition of the gas flow path 72 with respect to the resin discharge means 73, the holding adjustment means 74 of the resin discharge means 73 is provided. However, the resin discharge means 73 of the resin discharge means The resin discharge port of 73a has a very small diameter and is highly susceptible to stress such as vibration of the device or pressure of the resin, and may change the arrangement conditions of the resin discharge means 73 or the detachment from the head portion 7. Therefore, even if the angle at which the resin discharge port 74 is changed is adjusted, it is necessary to prevent the resin discharge needle 73a from being detached from the head portion 7 without applying stress to the resin discharge needle 73a.

(a) of FIG. 7 is an explanatory view showing a support structure of the resin discharge port support portion 74 for fixing the resin discharge means 73 to the resin discharge means holding ring portion 78 and adjusting the same. installation angle. The resin discharge means 73 is composed of a resin discharge needle 73a and a resin discharge needle attachment portion 73b, and the resin discharge needle attachment portion 73b is fixed to the head portion 7 by an appropriate fixing means such as screwing, engagement, or pin (not shown). The resin discharge means holds the ring portion 78. A resin discharge port support portion 74 is provided in the resin discharge needle 73a. The resin discharge port support portion 74 is provided with a resin discharge needle holding portion 74a so as to hold the resin discharge needle 73a from the periphery, and an adjustment rod 74c that can be moved forward and backward from the outer side of the head portion 7 as shown in Fig. 7 The adjustment means 74b is configured. By operating the adjustment means 74b, the adjustment lever 74c is moved forward and backward, and the resin discharge needle grip portion 74a is moved in the radial direction of the head portion 7, whereby the resin discharge needle 73a can be fixed at a desired position and angle. By the resin discharge port support portion 74, the resin discharge means 73 can adjust the discharge of the molten resin at a desired discharge angle with respect to the discharge airflow from the gas discharge port 71, and can reliably at this angle. fixed.

According to this configuration, it is useful as an adjustment means for the discharge angle of the molten resin of the discharge airflow, and the resin discharge needle 73a is a very thin tubular shape, and the tip end is in the nanofiber manufacturing apparatus 1 Although the motor 6 or the screw 5 may be driven to greatly vibrate during operation, the resin discharge port support portion 74 can effectively suppress the vibration. In the second embodiment of the present embodiment, six resin discharge means 73 are provided, and six resin discharge port support portions 74 are provided correspondingly. However, the present invention is not limited thereto, and may be used depending on the resin used. Conditions such as production volume and product characteristics are appropriately selected.

Another example of the angle adjustment function of the resin discharge means 73 is shown in Fig. 7(b). In the embodiment, the resin discharge port support portion 74 is also provided with a resin discharge needle holding portion 74d so as to be able to advance and retreat from the outer side of the head portion 7 so as to hold the resin discharge needle 73a from the periphery. The adjustment means (not shown) is configured. At this time, the adjustment means is operated to move the adjustment rod 74e forward and backward, and the resin discharge needle holding portion 74d is moved in the radial direction of the head portion 7, whereby the resin discharge needle 73a can be fixed at a desired position and angle. At this time, the resin discharge needle attachment portion 73c is formed in a spherical shape or a columnar shape, and the resin discharge means retaining ring portion 78 which is formed on the head portion 7 by the sliding surface 76 which is rotatable and rotatable as the resin discharge needle attachment portion 73c is formed. By attaching the resin discharge needle attachment portion 73c, the angle of the resin discharge needle 73a can be easily adjusted. Thereby, the angle of the resin discharge means 73 can be adjusted without fear of falling off of the resin discharge needle 73a.

In addition, as shown in the figure, the gas discharge port 71 and the resin discharge means 73 are disposed such that the gas discharge port 71 is retracted to a position on the downstream side of the resin discharge means 73. According to this configuration, the molten resin is gradually stretched along the distribution of the discharge gas flow of the gas ejected from the gas discharge port 71, and becomes a fiber having a nanometer diameter. Further, the gas ejecting unit 8 is provided by a heating means (not shown). Since the gas which is hot air is ejected, the resin discharged from the resin discharge means 73 can produce a nanofiber which is longer and has a smaller fiber diameter than when the normal temperature gas is ejected.

A series of operations of the nanofiber manufacturing apparatus 1 having the above configuration will be described. The raw material (resin) charged into the hopper 2 is heated by the heater 4 in the heating cylinder 3, melted, and sent out to the front of the heating cylinder 3 by the screw that is rotated by the motor 6. The molten resin that has reached the tip end of the heating cylinder 3 is discharged from the raw material discharge ports of the six resin discharge needles via the six resin flow paths 75 formed inside the head portion 7. The molten resin to be discharged is transported by the air current generated by the high-pressure, high-temperature gas supplied from the gas injection port 8 and injected from the gas discharge port 71. At this time, the molten resin is stretched and forms nanofibers by the speed difference between the gas stream of the faster high-temperature gas and the slower air trapped around.

(Example 2)

In the first embodiment of the present invention, a nanofiber manufacturing apparatus that melts and uses a fine-grained granular synthetic resin as a raw material is described in detail. However, as described above, the liquid raw material as a nanofiber is not limited. Here, a solid raw material or a liquid raw material may be melted in advance to form a molten material having a predetermined concentration with respect to a predetermined solvent. It is also a liquid raw material. 8 to 10 show a nanofiber manufacturing apparatus for forming nanofibers from a molten raw material. The same components as those in the first embodiment are denoted by the same reference numerals, and their detailed descriptions are omitted.

In the second embodiment of the present invention, the hopper 2A having the function of applying a predetermined pressure to the molten material to perform the extrusion is used instead of the hopper 2, the screw 5, and the motor 6 of the first embodiment. regulation The constant pressure can be a pressure based on gravity generated by the height difference. The solvent supply tube 3A and the gas injection unit 8 are connected to the head portion 7A. Although not shown in the drawings, the means for ejecting the gas may be appropriately provided in the gas ejecting unit 8 or introduced into the gas ejecting unit 8 from a high-pressure gas supply unit (not shown). As shown in FIG. 9, the head 7A is provided with a gas flow path 72A and a gas injection port 71A which are flow paths of the gas supplied from the gas injection unit 8. Further, in the head portion 7A, a resin flow path 75A as a flow path of the melting material is provided, and the resin flow path 75A is connected to the resin discharge means 73. In the same manner as in the first embodiment, the resin discharge means 73 is composed of a resin discharge needle 73a as a discharge port of the melting material and a resin discharge needle attachment portion (not shown) in Figs. 8 to 10 . Further, the resin discharge device holding plate portion 78A is provided in the head portion 7A, and the resin discharge needle holding portion 74a and the adjustment means for providing the adjustment lever 74c that can be advanced and retracted from the outside of the head portion 7A are provided. In the same manner as in the first embodiment, the discharge angle of the resin discharge needle 73a can be freely adjusted by the resin discharge port support portion 74 in the same manner as in the first embodiment.

As shown in Fig. 10, the nanofiber manufacturing apparatus in the second embodiment is provided with two resin discharge means 73. Needless to say, the arrangement of the resin discharge means 73 is not limited to two, and three or more resin discharge means 73 may be provided around the gas injection port 71A. At this time, it is desirable to uniformly provide the resin discharge means 73. Further, the embodiment shown in the drawing shows a horizontal discharge type, but it is easily exemplified by those skilled in the art that the gas flow path 72A from the gas injection port 71A is perpendicular to the vertical direction (from top to bottom, or from A modified example in which the lower side is sprayed upward.

According to this configuration, compared with the configuration of the first embodiment, the raw material is melted in the cross-section. By melting the raw material, the nanofiber manufacturing apparatus can be configured without using a complicated device such as a heating cylinder or a motor or a screw. Therefore, the size of the apparatus can be made compact, and space saving can be achieved. Further, the device can be configured compactly, whereby a portable nanofiber manufacturing device can be constructed. In the case of such a portable nanofiber manufacturing apparatus, nanofibers can be formed by blowing nanofibers toward a position where nanofibers are to be attached, and the use of the nanofibers is expanded.

The embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit and scope of the invention. For example, in the above-described embodiment, the nanofiber manufacturing apparatus which is a horizontal type in which the molten resin and the gas discharge port are oriented in the horizontal direction is shown. However, the present invention is not limited thereto, and is manufactured as a radial type nanofiber which is formed downward. There are no problems with the device and the manufacturing method. This situation can effectively avoid the influence based on gravity. Further, the extrusion device will be described as the screw 5, but the nanofibers to be produced are required to be cut off. However, there is no problem even if the solution is sequentially supplied by die casting and intermittently extruded by a piston or the like. Further, the gas discharge port 71 can be formed in a tapered shape and formed into a nozzle shape, and the pressure can be increased. In addition, the structure for adjusting the angle of the resin discharge needle 73a is described in two specific examples. For example, the structure may be any shape as long as it can adjust the angle of the resin discharge means of the bellows type.

1‧‧‧Nanofiber manufacturing equipment

2‧‧‧ hopper

3‧‧‧heating cylinder

4‧‧‧heater (heating means)

5‧‧‧ screw (extrusion device)

6‧‧‧Motor (driver)

7‧‧‧ head

71‧‧‧ gas outlet

72‧‧‧ gas flow path

73‧‧‧Resin discharge means

73a‧‧‧Resin spit out (raw material spit)

73b, 73c‧‧‧ resin spit needle installation

74‧‧‧Resin spout support

74a‧‧‧Resin spit out the needle grip

74b‧‧‧Adjustment Department

74c‧‧‧Adjustment rod

75‧‧‧Resin flow path

76‧‧‧ gas flow path

77‧‧‧heating cylinder cover

78‧‧‧Resin discharge means to keep the ring

8‧‧‧ gas injection department (gas injection means)

81‧‧‧Pipe (gas flow path)

90‧‧‧High pressure airflow

91‧‧‧Center line of high pressure airflow

Fig. 1 is a side view showing a part of the overall configuration of a first embodiment of the nanofiber manufacturing apparatus of the present invention.

Fig. 2 is a head and a heating in a nanofiber manufacturing apparatus of Example 1 of the present invention. The top view of the tube.

Fig. 3 is a front elevational view showing the front end of the head in the nanofiber manufacturing apparatus as an embodiment of the present invention.

Fig. 4 is a cross-sectional view taken along line A-A of the nanofiber manufacturing apparatus shown in Fig. 3.

Fig. 5 is a cross-sectional view showing the B-B line, the C-C line, and the D-D line of the nanofiber manufacturing apparatus shown in Fig. 4.

Fig. 6 is an explanatory view showing a resin flow path and a gas flow path inside the head in the nanofiber manufacturing apparatus of the first embodiment of the present invention.

Fig. 7 is a view showing an example of a support structure of the resin discharge means in Fig. 7 (a) of the nanofiber manufacturing apparatus according to the first embodiment of the present invention, and Fig. 7 (b) another example of the support structure of the resin discharge means. Illustrating.

Fig. 8 is a side view showing the overall configuration of a second embodiment of the nanofiber manufacturing apparatus of the present invention.

Fig. 9 is a plan view showing the overall configuration of a second embodiment of the nanofiber manufacturing apparatus of the present invention.

Fig. 10 is a front elevational view showing the head configuration of a second embodiment of the nanofiber manufacturing apparatus of the present invention.

Fig. 11 is an explanatory view for explaining the basic inventive concept of the nanofiber manufacturing apparatus and the nanofiber manufacturing method of the present invention.

3‧‧‧heating cylinder

4‧‧‧heater

5‧‧‧ screw

7‧‧‧ head

9‧‧‧Sheet Department

71‧‧‧ gas outlet

72‧‧‧ gas flow path

73a‧‧‧Resin spit out (raw material spit)

73b‧‧‧Resin spit needle installation

74a‧‧‧Resin spit out the needle grip

74b‧‧‧Adjustment Department

75‧‧‧Resin flow path

77‧‧‧heating cylinder cover

78‧‧‧Resin discharge means to keep the ring

B‧‧‧ line

C‧‧‧ line

D‧‧‧ line

Claims (10)

A nanofiber manufacturing apparatus comprising: a liquid material discharging device that discharges a liquid material from a high-pressure gas stream discharged from a high-pressure gas discharging means, wherein the liquid material discharging means ejects from the high-pressure gas discharging means The high-pressure airflow is provided with a plurality of centers. The nanofiber manufacturing apparatus according to the first aspect of the invention, wherein the liquid material discharging means includes an extrusion means for melting and extruding the raw material. The nanofiber manufacturing apparatus according to the first aspect of the invention, wherein the liquid material discharging means includes means for supplying a melting material. The apparatus for producing a nanofiber according to any one of the first to third aspect, wherein the high-pressure gas discharge means is provided with a gas supply means for supplying a high-pressure and high-temperature gas, and the high-pressure gas discharge means A high temperature gas is ejected at a high pressure. The apparatus for producing a nanofiber according to any one of the first to fourth aspects of the present invention, wherein the apparatus for adjusting the liquid material discharge means for adjusting the high-pressure gas stream ejected from the high-pressure gas discharge means is provided. Angle adjustment means. The nanofiber manufacturing apparatus according to any one of the first to fifth aspects of the present invention, wherein at least two or more of the liquid material discharging means are disposed symmetrically with respect to the high pressure gas discharging means. The apparatus for producing a nanofiber according to any one of the first aspect of the present invention, wherein the liquid material discharging means is disposed at equal intervals around a high-pressure air stream ejected from the high-pressure gas ejecting means. The apparatus for producing a nanofiber according to any one of the first to seventh aspect, wherein the high-pressure gas stream ejected from the high-pressure gas ejecting means is disposed in a direction perpendicular to a surface on which the nanofiber manufacturing apparatus is disposed. A method for producing a nanofiber, which is produced by discharging a liquid raw material from a liquid raw material discharge means with respect to a high-pressure gas stream discharged from a high-pressure gas discharge means, wherein a high-pressure gas stream discharged from the high-pressure gas discharge means is used When a plurality of the liquid material discharging means are disposed at the center to discharge the liquid material, the discharge angle of the liquid material discharging means from the liquid material of the high-pressure air stream is adjusted. A method for producing a nanofiber, comprising: a heating tube provided with a raw material, a heating means for heating the heating cylinder, and a nanofiber manufacturing apparatus for extruding a raw material in the heating cylinder, wherein the heating is performed A gas discharge port for injecting a high-pressure gas is provided at an end of the cylinder, and a plurality of raw material discharge means for discharging a raw material which is in a molten state in the heating cylinder are provided around the gas discharge port, and the heating means is used for the heating cylinder Heating is performed to melt the raw material supplied to the inside of the heating cylinder or to maintain the molten state of the raw material, and the raw material is discharged from the raw material discharging means by the extrusion device, and the gas is generated by the gas injected from the gas discharge port. The discharge raw material is stretched from the outer circumference by a gas flow of the discharge gas to form a fiber having a nanometer diameter.