JP2007098689A - Dispersion device for solid/liquid mixed fluid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dispersion device for a solid/liquid mixed fluid which uniformly disperses ultra-fine particles of stratified argillite into an organic polymer and/or its monomer while the aspect ratio of the particles is maintained. <P>SOLUTION: In the device, the solid/liquid mixed fluid is passed through a passage penetrating the inside. The passage comprises (a) a hole 11 introducing the mixed fluid by an external press-fitting means, (b) a retention part 12 made of a cylindrical cavity, (c) an accelerating/straightening part 13 made of a funnel-shaped cavity, (d) a nozzle hole 14 made of a cylindrical thin hole, (e) a hole 15 extending from the tip of the nozzle hole 14, and (f) a cylindrical cavity extending perpendicularly to the axial direction of the device. The device comprises a mixing part 16 in which a hole extending from the tip of the nozzle hole 14 is communicating approximately in a tangent shape and (g) holes 17 and 17 discharging the mixed fluid outside from both end parts in the axial direction of the mixing part 16. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a dispersion apparatus for a solid-liquid mixed fluid comprising inorganic ultrafine particles, an organic polymer and / or a monomer thereof, and a solvent, and in particular, a solid-liquid solution in which lamellar clay mineral ultrafine particles are dispersed in an organic polymer and / or a monomer thereof. The present invention relates to a dispersion device for mixed fluid.

  A polymer-based nanocomposite is a composite material in which nano-order inorganic ultrafine particles (particle size: usually 1 to 500 nm) are finely dispersed in an organic polymer, and micron-order inorganic fine particles are dispersed in an organic polymer. Compared to various physical properties (for example, tensile strength, elastic modulus, heat resistance, gas permeability resistance, etc.). Therefore, it is useful for applications such as automobile parts, packaging materials, electrical / electronic parts, and building materials.

However, in general, inorganic ultrafine particles tend to form aggregates and have a low affinity for organic polymers, so that it is extremely difficult to uniformly disperse them in organic polymers. Therefore, as shown in FIG. 7, Patent No. 2934229 (Patent Document 1) discloses a solid-liquid mixed fluid crushing / passage through which a solid-liquid mixed fluid composed of an organic polymer, inorganic fine particles, and a solvent is passed through a flow path penetrating the inside. A dispersion device, (a) a flow path having an introduction hole 100, a pair of branch flow paths 101, 101 communicating from now on, and nozzle portions 102, 102 provided at the front ends thereof; and (b) each nozzle An apparatus having a colliding member (for example, formed of a diamond sintered body) 103 provided at a crossing portion of the solid-liquid mixed fluid ejected from the portions 102 and 102 is proposed. When a solid-liquid mixed fluid is introduced into this apparatus at a pressure of 500 kg / cm ² or more and the injection speed from each nozzle section 102, 102 is set to 300 m / second or more, the solid-liquid mixed fluid that has collided with the member 103 If the inorganic fine particles therein are crushed / dispersed to form ultrafine particles and the solvent is removed from the discharged fluid, a polymer nanocomposite in which the ultrafine particles are finely dispersed can be obtained.

  This apparatus is suitable for the production of polymer nanocomposites containing ceramic ultrafine particles such as silica and titania because the fine particles are formed by crushing / dispersing the inorganic fine particles in the solid-liquid mixed fluid. However, when the inorganic fine particles made of layered clay mineral are crushed, the aspect ratio is lowered, and there is a problem that physical properties such as mechanical strength of the polymer nanocomposite are lowered.

  Ultrafine particles composed of lamellar clay minerals (clay ultrafine particles) and polymer nanocomposites composed of organic polymers are usually produced by an intercalation method. For example, JP-A-62-74957 (Patent Document 2) discloses a viscous mineral powder having a cation exchange capacity of 50 to 200 meq / 100 g as a method for producing a composite material having excellent mechanical strength and heat resistance (for example, Montmorillonite, etc.) and a swelling agent (eg, copper ions) are contacted to form a composite, the resulting composite is mixed with a polyamide monomer (eg, a lactam compound), and the resulting mixture is heat polymerized. Proposed method. In this method, since the monomer taken in between the layers of the viscous mineral is polymerized, a polymer-based nanocomposite in which the viscous mineral particles are finely dispersed is obtained. However, in this method, when the composite and the polyamide monomer are mixed, a mechanical mixing method using an automatic mortar, a vibration mill, or the like is used, so that the viscosity mineral is destroyed and it is difficult to maintain the aspect ratio.

  JP-A-8-302062 (Patent Document 3) discloses a method for producing a resin composition having excellent rigidity and heat resistance by inserting an organic cation (eg, a quaternary ammonium salt) between layers of a layered compound, and using an organic solvent. A method for producing an inorganic filler-containing resin composition by swelling and melt-kneading with a dispersed resin composition (organic polymer) has been proposed. In this method, the interlayer is opened by the insertion of the organic cation, the layer is separated by melt kneading with the organic polymer, and the organic polymer is taken into the ultrafine particles dispersed into a single layer, so that the polymer system in which the layered compound is finely dispersed A nanocomposite is obtained. However, in this method, the layered compounds may collide and be destroyed during the melt-kneading, and it is difficult to maintain the aspect ratio of the layered compound particles.

Patent No. 2934229 JP 62-74957 A JP-A-8-302062

  Accordingly, an object of the present invention is to provide a dispersion device for a solid-liquid mixed fluid in which the aspect ratio of ultrafine particles composed of a layered clay mineral is maintained and uniformly dispersed in an organic polymer and / or its monomer. .

  As a result of diligent research in view of the above-mentioned object, the present inventor allows the solid-liquid mixed fluid to pass through the nozzle hole at high speed and causes the fluid ejected from the nozzle hole to rotate at high speed in the flow path having a cylindrical wall surface. While maintaining the aspect ratio of the ultrafine particles made of layered clay mineral, it was found that it can be uniformly dispersed in the organic polymer and / or its monomer, and the present invention has been conceived.

  That is, the solid-liquid mixed fluid dispersing apparatus of the present invention has a columnar outer shape, and is formed from inorganic ultrafine particles, an organic polymer and / or a monomer thereof, and a solvent in a flow path penetrating the inside substantially along the axis. A solid-liquid mixed fluid dispersing device for passing the solid-liquid mixed fluid to disperse the inorganic ultrafine particles in the organic polymer and / or monomer thereof, wherein the flow path comprises (a) one end of the device A hole for introducing the solid-liquid mixed fluid by an external press-fitting means, and (b) a residence consisting of a cylindrical cavity extending in the axial direction of the device from a stepped portion having a diameter expanded from the tip of the introduction hole And (c) an acceleration / rectification unit comprising a funnel-like cavity extending in the axial direction of the device from the tip of the retention portion, and (d) a cylinder extending in the axial direction of the device from the tip of the acceleration / rectification unit A nozzle hole consisting of a fine pore, and (e) A hole extending in the axial direction of the device from the tip of the nozzle hole, and (f) a cylindrical cavity extending perpendicular to the axial direction of the device, and the hole extending from the tip of the nozzle hole is the cylinder (G) provided at the other end of the device, and mixed with the solid-liquid mixture from both ends in the axial direction of the mixing unit. A hole for discharging the fluid to the outside, allowing the solid-liquid mixed fluid to pass through the nozzle hole, and swirling the solid-liquid mixed fluid ejected from the nozzle hole along the cylindrical wall surface of the mixing unit The inorganic ultrafine particles are uniformly dispersed in the organic polymer and / or the monomer thereof by guiding them to the discharge holes.

  The accelerating / rectifying unit preferably includes a plurality of funnel-shaped cavities successively reduced in diameter from the staying unit. In a preferred example of the present invention, the inorganic ultrafine particles are composed of a layered clay mineral. The pressure at which the solid-liquid mixed fluid is introduced is preferably 49 MPa or more. The velocity of the solid-liquid mixed fluid ejected from the nozzle hole is preferably 100 m / second or more.

  The solid-liquid mixed fluid dispersing apparatus of the present invention can uniformly disperse inorganic ultrafine particles in an organic polymer and / or a monomer thereof. In particular, while maintaining the aspect ratio of the layered clay mineral ultrafine particles, it can be finely dispersed in the organic polymer and / or its monomer. The solid-liquid mixed fluid discharged from the apparatus can be made into a polymer-based nanocomposite in which inorganic ultrafine particles are uniformly dispersed by removing the solvent.

[1] Solid-liquid mixed fluid Solid-liquid mixed fluid (hereinafter simply referred to as “fluid” unless otherwise specified) is composed of inorganic ultrafine particles, organic polymer and / or monomer thereof, and solvent. The particle size of the inorganic ultrafine particles is not particularly limited, but is usually 1 to 500 nm. The inorganic ultrafine particles may be made of either an inorganic compound or a metal. Examples of the ultrafine particles made of an inorganic compound include layered clay mineral ultrafine particles and ceramic ultrafine particles. Examples of layered clay mineral ultrafine particles include montmorillonite, saponite, beidellite, nontrite, hectorite, stevensite, mica, vermiculite, halloysite, and the like, and any of natural products and synthetic products may be used. Examples of the ceramic ultrafine particles include oxide ceramics (for example, silicon oxide, titanium oxide, alumina, etc.), nitride ceramics, carbide ceramics, and the like.

  The organic polymer and its monomer may be known ones, and examples thereof include synthetic resins such as polyethylene, polypropylene, polyamide, polyphenylene sulfite, polyimide, acrylic resin, polyester (for example, polybutylene terephthalate, polyethylene terephthalate), and monomers thereof. be able to.

  What is necessary is just to select a solvent suitably according to the organic polymer to be used or its monomer. Examples of the solvent include alcohols such as ethyl alcohol, isopropyl alcohol and isobutyl alcohol; ketones such as methyl ethyl ketone; aromatics such as toluene and xylene; water and the like. A solvent may be used independently and may use 2 or more types together as needed.

  You may add a compatibilizing agent (for example, silane coupling agent etc.) to a fluid as needed. The compatibilizer is appropriately selected according to the combination of the inorganic ultrafine particles and the organic polymer. When layered clay mineral ultrafine particles are used, they may be modified with an organic swelling agent (for example, an organic cation, etc.) as necessary, which further facilitates delamination. An organic cation and a method for modifying the layered clay mineral ultrafine particles using the organic cation are described in Patent Document 3, for example.

  The fluid is prepared by mixing the inorganic ultrafine particles, the organic polymer and / or the monomer thereof, and the solvent, and stirring the mixture so that the inorganic ultrafine particles are not destroyed. The fluid only needs to have fluidity, and its viscosity is not particularly limited.

[2] Dispersion device for solid-liquid mixed fluid FIGS. 1 to 6 show an example of a dispersion device for solid-liquid mixed fluid of the present invention. This apparatus includes an introduction side block 1, a main block 2, a nozzle portion 3, and a discharge side block 4, and has a columnar outer shape and a flow path that penetrates the inside along its axis. This flow path is provided at one end of the apparatus (a), the hole 11 for introducing the solid-liquid mixed fluid by the external press-fitting means, and (b) the step line 1a expanded from the introduction hole 11 to the axis of the apparatus. A stagnation part 12 consisting of a cylindrical cavity extending in the direction, (c) an acceleration / rectification part 13 in which two funnel-like cavities successively reduced in diameter from the stagnation part 12 are connected, and (d) an acceleration / rectification part A nozzle hole 14 consisting of a cylindrical fine hole extending from the tip of 13 in the axial direction of the device, (e) a hole 15 extending from the tip of the nozzle hole 14 in the axial direction of the device, and (f) relative to the axial direction of the device. A mixing portion 16 comprising a cylindrical cavity extending vertically and having a hole 15 communicating in a substantially tangential manner at substantially the center in the axial direction of the cylindrical cavity, and (g) provided at the other end of the apparatus. And a hole 17 through which fluid is discharged from both ends of the mixing portion 16 in the axial direction.

What is necessary is just to connect the dispersion | distribution apparatus for solid-liquid mixed fluid to the means to press-fit a fluid from the outside via a high-pressure hose etc. Therefore, a port 10 for connecting a joint of a high-pressure hose is provided at one end of the apparatus. Examples of the external press-fitting means include an extruder and a high-pressure pump. The fluid is preferably introduced into the apparatus at a pressure of 500 kg / cm ² (49 MPa) or more by external press-fitting means. When this pressure is less than 49 MPa, the dispersibility of the inorganic ultrafine particles is lowered. The upper limit of the introduction pressure is not particularly limited, but is practically preferably 3,000 kg / cm ² (294 MPa) or less.

An introduction hole 11 is provided at the bottom of the connection port 10. The introduction hole 11 is formed in a funnel shape so that the fluid flows smoothly. The inlet diameter of the introduction hole 11 is preferably substantially the same as the diameter of the discharge hole of the high-pressure hose. The inclination angle θ ₁ of the mortar-shaped portion of the introduction hole 11 is preferably 45 to 90 degrees.

The staying part 12 is composed of a cylindrical cavity extending in the axial direction of the apparatus from the stepped part 1a having a diameter expanded from the introduction hole 11. By temporarily retaining the fluid in the retention part 12, it is possible to reduce the turbulent flow of the fluid in the subsequent acceleration / rectification part 13. Further, a sufficient fluid pressure can be applied to the fluid in the subsequent acceleration / rectification unit 13 and the nozzle hole 14 by the pressure (static pressure) of the staying unit 12. By appropriately adjusting the aspect ratio and size of the staying portion 12, the flow pressure applied to the fluid in the acceleration / rectifying portion 13 and the nozzle hole 14 can be adjusted. Although not limited, the cross-sectional diameter of the retention portion 12 is preferably 50 to 150 times the diameter of the nozzle hole 14. The aspect ratio L ₁ / L ₂ of the staying portion 12 is preferably 1.5 / 1 to 4/1.

The accelerating / rectifying unit 13 is formed by connecting first and second funnel-like cavities 13 a and 13 b that are successively reduced in diameter from the staying unit 12. As shown in detail in FIG. 5, the first and second funnel-shaped cavities 13a and 13b each include a mortar-shaped acceleration section 130a and 130b and cylindrical rectification sections 131a and 131b. In order to sufficiently accelerate the fluid, the inclination angles θ ₂ and θ ₃ of the mortar-shaped acceleration portions 130a and 130b are preferably 45 to 150 degrees. In the rectifying units 131a and 131b, the turbulent flow generated in the accelerating unit can be arranged to prevent a decrease in the fluid velocity. The aspect ratios L ₃ / L ₄ and L ₅ / L ₆ of the rectifying units 131a and 131b are preferably 1.5 / 1 to 4/1, respectively. By providing the acceleration / rectification unit 13 composed of such first and second funnels, a sufficient speed can be imparted to the fluid introduced into the nozzle hole 14 while suppressing turbulent flow. However, the accelerating / rectifying unit 13 is not limited to one composed of two funnels. The accelerating / rectifying unit 13 may be configured by one funnel-shaped cavity as necessary, or may be configured by three or more funnel-shaped cavities whose diameters are sequentially reduced.

The degree of diameter reduction L ₆ / L _{2 at the} acceleration / rectification unit 13 (ratio of the outlet diameter to the inlet diameter in the acceleration / rectification unit 13) is preferably 1/5 to 1/20. To the fluid smoothly introduced into the nozzle hole 14, to ensure sufficient flow velocity in the nozzle hole 14, the outlet diameter L ₆ in the acceleration / rectifier 13 is from 1 to 10 times the diameter of the nozzle hole 14 Is preferred.

  The nozzle hole 14 is a cylindrical pore extending from the tip of the acceleration / rectifying unit 13 in the axial direction of the apparatus. By allowing the fluid to pass through the nozzle holes 14 at a high speed, the aggregated inorganic ultrafine particles are dissociated into individual particles (cohesive failure) and dispersed in the fluid. In particular, the layered clay mineral-based inorganic ultrafine particles are oriented so that the longitudinal direction thereof is substantially parallel to the fluid flow direction, delamination occurs, and the fine dispersion is performed in the fluid. In this fine dispersion mechanism, the flow rate of the solid phase (inorganic ultrafine particles) in the fluid is slower than the flow rate of the liquid phase (solvent and organic polymer and / or its monomer), so that the layered clay mineral inorganic ultrafine particles Due to the pressure in the longitudinal direction (direction parallel to the layer) in the holes 14 and the liquid (solvent and organic polymer and / or its monomer) enter between the layers and the layers open and peel Guessed.

  The velocity of the fluid ejected from the nozzle hole 14 is preferably 100 m / second or more. When this speed is less than 100 m / sec, the dispersibility of the inorganic ultrafine particles is lowered. The upper limit of this speed is not particularly limited, but is preferably 500 m / second or less for practical use. The diameter and axial length of the nozzle hole 14 are appropriately set according to the fluid supply amount. Although not limited, the diameter of the nozzle hole 14 is preferably 100 to 500 μm and the axial length is preferably 3 to 15 mm.

  The nozzle 3a is made of a diamond sintered body, a cemented carbide sintered body, a metal base such as iron or cobalt, on which a large number of diamond particles are electrodeposited, in order to suppress wear caused by a fluid passing at high speed. Preferably it is. Among these, a diamond sintered body is preferable. The nozzle 3a is integrated with the nozzle case 3b. Examples of the material of the nozzle case 3b include stainless steel, but are not limited thereto. Since a method for integrally manufacturing a member made of stainless steel and a diamond sintered body is known, the description thereof is omitted. Although not limited, the diameter of the nozzle 3a is preferably 20 to 50 times the diameter of the nozzle hole 14.

  The fluid ejected from the nozzle hole 14 flows to the mixing unit 16 through the communication hole 15 extending from the tip of the nozzle hole 14 in the axial direction of the apparatus. The diameter of the communication hole 15 is preferably 5 to 20 times the diameter of the nozzle hole 14.

  The mixing portion 16 is formed of a cylindrical cavity extending perpendicularly to the axial direction of the apparatus, and the hole 15 communicates substantially tangentially at substantially the center in the axial direction of the cylindrical cavity. Then, holes 17 and 17 for discharging the fluid to the outside from both ends in the axial direction of the mixing section 16 are provided outward from the front end in the axial direction of the apparatus in the mixing section 16. Therefore, in the mixing section 16, the fluid ejected from the nozzle hole 14 can be guided to the discharge holes 17 and 17 while being divided at both ends thereof and swirling at high speed along the cylindrical wall surface. In the process, the inorganic ultrafine particles can be more uniformly dispersed in the fluid. Here, “substantially tangentially communicating” is not limited to the case where it is completely tangentially communicated with the cylindrical cavity of the mixing unit 16, but the fluid that has flowed into the mixing unit 16 has a cylindrical wall surface. It is meant to include the case where it deviates from the tangent line within a range where it can turn along the line.

The degree of dispersion of the ultrafine particles can be adjusted by adjusting the size of the mixing section 16 and the aspect ratio L ₇ / L ₈ . Although not limited, it is preferable that the cross-sectional diameter of the mixing portion 16 is 70 to 200 times the diameter of the nozzle hole 14. In general, the aspect ratio L ₇ / L ₈ of the mixing unit 16 is preferably 1.2 / 1 to 3/1. The diameter of the discharge holes 17, 17 may be set as appropriate according to the amount of fluid introduced.

  As described above, in the apparatus of the present invention, the fluid passes through the nozzle hole 14 at a high speed, and the fluid ejected from the nozzle hole 14 is swirled at a high speed along the cylindrical wall surface of the mixing unit 16. They are dispersed in the fluid without any collision between them. Therefore, it can be dispersed in the organic polymer and / or its monomer in nano order while maintaining the aspect ratio of the layered clay mineral ultrafine particles.

  The fluid discharged from the apparatus can be made into a polymer-based nanocomposite in which inorganic ultrafine particles are uniformly dispersed by removing the solvent. If the fluid contains an organic polymer monomer, it may be polymerized before or after removing the solvent. What is necessary is just to shape | mold the obtained polymer type nanocomposite in a various shape according to a use.

  A member configuration of the solid-liquid mixed fluid dispersing apparatus will be described. As shown in FIG. 6, this apparatus is integrated by screwing the introduction side block 1, the main block 2, the nozzle part 3 and the discharge side block 4 with screws 30 through packings 20 to 22, respectively. ing. The introduction side block 1 is provided with a cylindrical projection 1b for forming the connection port 10, the introduction hole 11 and the staying portion 12. The main block 2 is provided with a cavity 2a that accommodates the cylindrical projection 1b of the introduction side block 1, an acceleration / rectification portion 13, and a recess 2b that accommodates the nozzle portion 3. A part of the communication hole 15 is provided in the nozzle case 3b. The discharge block 4 has an annular protrusion 4a for sandwiching the nozzle portion 3 with the main block 2, a mixing portion 16, and a lid 4b screwed through a packing 23 to seal the mixing portion 16. A part of the communication hole 15 (one broken part of the communication hole 15 provided in the nozzle case 3b) and discharge holes 17, 17 are provided. Examples of the material of the members 1, 2, and 4 include stainless steel, but are not limited thereto. Examples of the material of the packings 20 to 23 include Teflon (registered trademark), but are not limited thereto.

  Although the present invention has been described with reference to the drawings as described above, the present invention is not limited thereto, and various modifications can be made without changing the gist of the present invention. For example, a heater may be provided in any part of the solid-liquid mixed fluid dispersing apparatus, and the fluid may be passed through the flow path while being heated.

(a) is a left side view showing an example of a solid-liquid mixed fluid dispersing device of the present invention, (b) is a front view of the device shown in FIG. 1 (a), and (c) is a diagram of FIG. It is a right view of the apparatus shown to). It is AA sectional drawing of FIG. It is sectional drawing of the apparatus shown in FIG. It is a partial expanded sectional view which shows the introduction hole of the apparatus shown in FIG. It is a partial expanded sectional view which shows the acceleration / rectification | straightening part and nozzle of the apparatus shown in FIG. It is a perspective view which shows the member structure of the apparatus shown in FIG. It is sectional drawing which shows the example of the dispersing device for conventional solid-liquid mixed fluids.

Explanation of symbols

1 ... Introduction block
1a ... Step
1b ... Cylindrical protrusion 2 ... Main block
2a ... Cavity
2b ... concave part 3 ... nozzle part
3a ... Nozzle
3b ... Nozzle case 4 ... Discharge side block
4a ... Annular projection
4b ... Lid
10 ... Connection port
11 ... Introduction hole
12 ... Retention part
13 ... Acceleration / rectifier
13a, 13b ... funnel
130a, 130b ... Accelerator
131a, 131b ... rectifier
14 ... Nozzle hole
15 ... Communication hole
16 ... Mixing section
17 ... Discharge hole
20, 21, 22, 23 ... packing
30 ... Screw

Claims (4)

A solid-liquid mixed fluid comprising inorganic ultrafine particles, an organic polymer and / or a monomer thereof, and a solvent is passed through a flow path having a columnar outer shape and penetrating the inside substantially along the axis thereof, and the inorganic ultrafine particles are passed through. Is dispersed in the organic polymer and / or monomer thereof for a solid-liquid mixed fluid, wherein the flow path comprises:
(a) provided at one end of the apparatus, and a hole for introducing the solid-liquid mixed fluid by external press-fitting means;
(b) a staying portion consisting of a cylindrical cavity extending in the axial direction of the device from a stepped portion having a diameter expanded from the tip of the introduction hole;
(c) an accelerating / rectifying unit comprising a funnel-shaped cavity extending in the axial direction of the device from the tip of the retention unit;
(d) a nozzle hole consisting of a cylindrical fine hole extending in the axial direction of the device from the tip of the acceleration / rectification unit;
(e) a hole extending in the axial direction of the device from the tip of the nozzle hole;
(f) a cylindrical cavity extending perpendicularly to the axial direction of the device, and the hole extending from the tip of the nozzle hole communicates substantially tangentially at the approximate center in the axial direction of the cylindrical cavity. A mixing section,
(g) provided at the other end of the apparatus, and having a hole for discharging the solid-liquid mixed fluid to the outside from both ends in the axial direction of the mixing unit; And passing the solid-liquid mixed fluid ejected from the nozzle hole to the discharge hole while swirling along the cylindrical wall surface of the mixing unit, thereby allowing the inorganic ultrafine particles to be introduced into the organic polymer and / or A dispersing apparatus for a solid-liquid mixed fluid, wherein the monomer is uniformly dispersed. 2. The solid-liquid mixed fluid according to claim 1, wherein the accelerating / rectifying unit includes a plurality of funnel-like cavities sequentially reduced in diameter from the staying unit. Distribution device. 3. The dispersion apparatus for a solid-liquid mixed fluid according to claim 1, wherein the inorganic ultrafine particles are composed of a lamellar clay mineral. The solid-liquid mixed fluid dispersing apparatus according to any one of claims 1 to 3, wherein a pressure at which the solid-liquid mixed fluid is introduced is 49 MPa or more, and the solid-liquid mixed fluid injected from the nozzle hole Dispersing device for solid-liquid mixed fluid, characterized in that the speed is 100 m / sec or more.

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