TW201707792A - Orifice, liquid feeding apparatus and coating apparatus using the same, and manufacturing method of optical film capable of promoting deagglomeration and inhibiting retention of particles - Google Patents

Abstract

Provided are an orifice capable of promoting deagglomeration and inhibiting retention of particles, a liquid feeding apparatus and a coating apparatus using the same, and a manufacturing method of an optical film. The orifice comprises an orifice body, an inflow opening located at the inflow side of the orifice body, a shrinkage portion composed of a curved surface which has continuous radius of curvature of 1 to 10 mm from the inflow opening and a primary side inner wall which is continuously shrunk from the curved surface to a shrunk surface of a narrow opening with an angle of 120DEG to 180DEG, and an expanding portion composed of a secondary side inner wall which is continuously expanded from the narrow opening to an outflow opening with an angle of 2DEG to 10DEG, wherein the curved surface has a radius of curvature of 1mm to 10mm, wherein a ratio of the diameter of the narrow opening to the diameter of the inflow opening is 0.07 to 0.18.

Description

Nozzle, liquid supply device using nozzle, coating device, and method for manufacturing optical film

The present invention relates to a spout, a liquid feeding device using the spout, a coating device, and a method of producing an optical film.

Liquids containing particles are used in many fields. For example, a liquid (also referred to as a coating liquid) containing particles is applied to a surface of a strip-shaped web that is continuously conveyed to form a coating film having a desired thickness, thereby producing a functional film such as an optical film. In the process of the functional film, the liquid containing the particles is supplied to the coating head through the flow path, and the liquid containing the particles is supplied from the coating head to the mesh.

In the case of using a liquid containing particles, there is a case where the particles aggregate in the process to become aggregates of the particles, and therefore it is necessary to disperse the aggregates of the particles.

Patent Document 1 describes that a liquid is supplied to a narrow flow path by forcibly, and then liquid is supplied to a flow path having a wide diameter to deagglomerate the aggregate of primary particles of the organic crosslinked polymer particles to become primary particles. .

Prior technical literature Patent literature

Patent Document 1 Japanese Patent Laid-Open Publication No. 2014-196468

In spite of this, in the technique of Patent Document 1, the deagglomeration of the aggregate is not sufficient, and the particles remain in the inflow side of the flow path.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a nozzle capable of promoting deagglomeration of particle aggregates, and capable of suppressing retention of particles, and a liquid supply device using a nozzle, a coating device, and a method for producing an optical film. .

According to an aspect of the present invention, a spout has: a spout body; an inflow opening located at an inflow side of the spout body; an outflow opening located at an outflow side of the spout body; and a reduced diameter portion having a continuous radius of curvature from the inflow opening a curved surface of 1 to 10 mm and a primary inner wall which is continuous from the curved surface and is reduced in diameter from 120 to 180° to a reduced diameter surface of the narrow opening; and the enlarged diameter portion is continuous from the narrow opening to the outflow opening The secondary side inner wall is expanded at an angle of 2 to 10 degrees, and the ratio of the diameter of the narrow opening to the diameter of the inflow opening is 0.07 to 0.18.

Preferably, the angle of the reduced diameter surface of the primary side inner wall is 130 to 170 degrees.

Preferably, the diameter of the secondary side inner wall is 5 to 8 degrees.

Preferably, the ratio of the diameter of the narrow opening to the diameter of the inflow opening is 0.07 to 0.14.

According to another aspect of the present invention, a liquid supply device includes: a flow path through which a fluid containing particles passes; the discharge port is disposed in a portion of the flow path for fluid to pass therethrough; and a drive source for delivering the fluid to Flow path and spout.

According to another aspect of the present invention, a coating apparatus includes: a flow path through which a coating liquid containing particles passes; the discharge port is provided in a part of a flow path for a coating liquid to pass; and a coating head is disposed in the discharge port Downstream side.

According to another aspect of the present invention, a method for producing an optical film includes the steps of: supplying a coating liquid containing particles from a coating device continuously supplied to a web to form a coating film; and coating a coating film Dry, and / or harden.

According to the present invention, in the process of using a liquid containing particles, deagglomeration of particles can be promoted, and retention of particles can be suppressed.

10‧‧‧ spout

12‧‧‧ spout body

14‧‧‧Inflow opening

16‧‧‧Narrow opening

18‧‧‧First side inner wall

20‧‧‧ Reduced diameter

22‧‧‧ Surface

24‧‧‧Reducing surface

26‧‧‧ Outflow opening

28‧‧‧second side inner wall

30‧‧‧Extended section

32‧‧‧One side flange

34‧‧‧ditch

36‧‧‧second side flange

38‧‧‧ditch

60‧‧‧Pipe

100‧‧‧ Manufacturing line

102‧‧‧Support roller

104‧‧‧Slotting

106‧‧‧ Coating solution

108‧‧‧storage tank

110‧‧‧ Liquid delivery pump

112‧‧‧ pressure gauge

114‧‧‧Decompression degasser

116‧‧‧Filter filter

118‧‧‧ Flowmeter

120‧‧‧Processing area

130‧‧‧Second storage tank

200‧‧‧ liquid delivery device

202‧‧‧ fluid

ID1~ID3‧‧‧ Diameter

OD‧‧‧OD

α, β‧‧‧ angle

Fig. 1(A) is a side view of the spout, and Fig. 1(B) is a cross-sectional view of the spout.

Fig. 2 is a schematic configuration diagram of a manufacturing line of an optical film.

Fig. 3 is a schematic structural view of a liquid feeding device.

Figure 4 is a table showing the results of the examples.

[Formation for carrying out the invention]

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The invention is illustrated by the following preferred embodiments. Modifications can be made by many methods without departing from the scope of the invention, and other embodiments than the present embodiment can be utilized. Therefore, all modifications within the scope of the invention are included in the scope of the claims.

Here, the parts denoted by the same reference numerals are the same elements having the same functions. In addition, in the present specification, when "~" is used to indicate a numerical range, the numerical values of the upper limit and the lower limit indicated by "~" are also included in the numerical range.

Fig. 1(A) is a side view of the nozzle of the present embodiment taken along the line B-B, and Fig. 1(B) is a cross-sectional view of the nozzle of the embodiment. The spout 10 of the present embodiment is disposed between the pipes 60 for supplying fluid.

The spout 10 has a cylindrical spout body 12. The nozzle body 12 is made of, for example, a stainless steel material. However, these materials are not limited to stainless steel. The outer diameter OD of the nozzle body 12 is, for example, 15 to 30 mm. However, the outer diameter OD is appropriately determined in consideration of the liquid supply device, the coating device, and the like to which the nozzle 10 is applied. The shape of the nozzle body 12 is not limited to a cylindrical shape.

The nozzle body 12 is provided with an inflow opening 14 located on the inflow side with respect to the flow direction of the fluid indicated by the arrow A. The inflow opening 14 receives a fluid containing particles. Since the diameter ID1 of the inflow opening 14 is almost equal to the inner diameter of the pipe 60 connected to the inflow side, it is preferable to reduce the resistance of the fluid. The diameter ID1 of the inflow opening 14 is, for example, 10 to 20 mm. However, the diameter ID1 is appropriately determined in consideration of the liquid supply device, the coating device, and the like to which the nozzle 10 is applied.

The nozzle body 12 is provided with a reduced diameter portion 20 including a primary side inner wall 18 that extends from the inflow opening 14 to the narrow opening 16 . The diameter ID2 of the narrow opening 16 is, for example, 1 to 5 mm. In the present embodiment, the ratio (ID2/ID1) of the diameter ID2 of the narrow opening 16 to the diameter ID1 of the inflow opening 14 is in the range of 0.07 to 0.18, preferably in the range of 0.07 to 0.14.

The primary side inner wall 18 has a curved surface 22 having a continuous radius of curvature r of 1 to 10 mm from the inflow opening 14. The curved surface 22 faces a narrow opening 16 having a smaller diameter than the inflow opening 14. Further, the primary side inner wall 18 has a reduced diameter surface 24 which is continuous from the curved surface 22 and is reduced in diameter to the narrow opening 16 at an angle α of 120 to 180°. The angle α of the reduced diameter of the reduced diameter surface 24 is preferably 130 to 170°.

The length of the reduced diameter portion 20 (the distance from the inflow opening 14 to the narrow opening 16) is, for example, 10 to 100 mm. However, it is not limited to this length.

The angle α of the reduced diameter surface 24 means the angle between the tangent lines that are in contact with the reduced diameter surface 24 at the position where the narrow opening 16 is held, respectively, in cross section. Here, the diameter reduction is seen from the flow direction of the fluid, and the diameter (inner diameter) of the primary side inner wall 18 is reduced.

In the present embodiment, since the primary inner wall 18 is reduced in diameter by an angle α of 120 to 180°, the primary inner wall 18 is reduced in diameter from the diameter ID1 of the inflow opening 14 to the diameter ID2 of the narrow opening 16.

The nozzle body 12 is provided with an enlarged diameter portion 30 including a secondary side inner wall 28 that is continuous from the narrow opening 16 to the outflow opening 26 and has an increased diameter by an angle β of 2 to 10°. Further, the angle β of the diameter expansion is preferably 5 to 8°.

The outflow opening 26 has a diameter ID3 which is substantially the same as the diameter ID1 of the inflow opening 14, and the diameter ID3 of the outflow opening 26 is, for example, 10 to 20 mm. Further, the diameter ID3 of the outflow opening 26 is almost equal to the inner diameter of the pipe 60 connected to the outflow side. However, the diameter ID3 is appropriately determined in consideration of the liquid supply device, the coating device, and the like to which the nozzle 10 is applied. Further, the length of the enlarged diameter portion 30 is, for example, 80 to 200 mm. However, it is not limited to this length.

The secondary side inner wall 28 extends linearly from the narrow opening 16 to the outflow opening 26 in a cross-sectional view. The angle β of the secondary side inner wall 28 means an angle formed by the extension of the secondary side inner wall 28 at the position where the narrow opening 16 is held in a cross-sectional view. Here, the diameter expansion means that the diameter (inner diameter) of the secondary side inner wall 28 is enlarged as viewed in the flow direction of the fluid.

The secondary side inner wall 28 extends from the narrow opening 16 to the outflow opening 26 and expands at an angle β of 2 to 10°, so that the diameter expansion angle β of the secondary side inner wall 28 in the enlarged diameter portion 30 is at the narrow opening 16 It is substantially constant between the outflow openings 26 and in the range of 2 to 10 degrees. In other words, the enlarged diameter portion 30 does not have a portion (also referred to as a narrow path) in which the secondary side inner wall 28 at the position where the narrow opening 16 is held is parallel.

The spout 10 is provided with a primary side flange 32 on the inflow side of the reduced diameter portion 20. The primary side flange 32 is provided with a groove 34 for a sealing member (not shown) to be used when the pipe 60 connecting the spout 10 and the inflow side is housed.

The spout 10 is provided with a secondary side flange 36 on the outflow side of the enlarged diameter portion 30. The secondary side flange 36 is provided with a groove 38 for a sealing member (not shown) to be used when the pipe 60 connecting the spout 10 and the outflow side is housed.

In the spout 10 of the present embodiment, the liquid containing the particles flows into the reduced diameter portion 20 of the spout body 12 from the inflow opening 14. There are cases where particles in a liquid aggregate with each other to form an aggregate. The primary side inner wall 18 is rapidly reduced in diameter by the narrowed opening 16 having a small diameter by the reduced diameter surface 24 of 120 to 180°, so that turbulence occurs when the liquid passes through the narrow opening 16. By this turbulent flow, the deagglomeration of the aggregates of the particles is promoted. Further, since the primary side inner wall 18 has the curved surface 22 having a curvature radius of 1 to 10 mm, it is possible to suppress the particles from remaining in the reduced diameter portion 20. Thereby, the malfunction due to the retention of the particles can be suppressed. When the particles are retained in the reduced diameter portion 20, the retained particles pass through the discharge port 10 without being deaggregated. Failures may occur due to particles that are not agglomerated (eg, grain failure, point defects, inability to perform, etc.).

The flow system passing through the narrow opening 16 moves toward the enlarged diameter portion 30 and flows out from the outflow opening 26. The aggregates in the fluid moving toward the enlarged diameter portion 30 are turbulent and deaggregated. During the flow of fluid from the narrow opening 16 to the outflow opening 26, the deagglomerated particles must not be agglomerated. The secondary side inner wall 28 of the enlarged diameter portion 30 of the present embodiment is expanded by a gentle angle β of 2 to 10°, and has no narrow path. Since the diameter is increased, the particles in the fluid are prevented from coming into contact with each other, and re-aggregation can be suppressed. Further, since it is a gentle angle β of 2 to 10°, the particles are easily brought into contact with the secondary side inner wall 28. By the particles being in contact with the secondary side inner wall 28, even when the particles are reaggregated, contact with the secondary side inner wall 28 can be utilized to promote deagglomeration.

Here, deagglomeration means that the size (length of the long side) of the aggregate of the particles is 20% or less after passing through the nozzle, compared to before passing through the nozzle.

It is estimated that the above-described action is exerted by the nozzle of the present embodiment, and it is possible to promote deagglomeration of particles and suppress retention of particles. Further, the specific effects of the nozzle 10 described above will be described using an embodiment to be described later.

Fig. 2 is a schematic configuration diagram of a manufacturing line in which a coating apparatus to which the nozzle of the embodiment is applied is provided in a manufacturing line of an optical film.

The manufacturing line of the optical film is prepared by continuously feeding out a resin film wound in a roll shape (hereinafter referred to as "web"), and winding the web W into a roll shape. Between the steps, the step of forming a coating film on the web; the step of drying the coating film; and/or the step of hardening the coating film, etc., is only a necessary number of steps.

The manufacturing line 100 shown in FIG. 2 has a support roll 102 that winds the mesh W at the application position, and a slot die 104 that is disposed on the application head with respect to the support roll 102. The coating liquid 106 containing the particles for producing an optical film is supplied to the slit die 104 through the pipe 60. Here, the pipe 60 is a flow path through which the coating liquid containing the particles passes. In the flow path, if the coating liquid 106 containing particles can pass therethrough, the material, shape, and the like are not limited. Moreover, examples of the optical film produced from the coating liquid 106 containing particles include an antiglare film, a scattering film, and a diffusion film.

In the present embodiment, the slit die 104 is exemplified as a coating head. Here, the coating head, if it can apply a fluid containing particles, The method is not limited. For example, an extrusion method, an inkjet method, a slide coating method, or the like can be used.

The coating liquid 106 containing particles is stored in the storage tank 108. The storage tank 108 and the slit die 104 are in fluid communication through the pipe 60. The liquid supply pump 110, the pressure gauge 112, the vacuum deaerator 114, the filter filter 116, the flow meter 118, and the spout 10 are provided in the piping 60 between the storage tank 108 and the slit die 104 from the upstream side to the downstream side. a part of.

The "upstream" and "downstream" are used in relation to the moving direction of the coating liquid (fluid). The case of being located on the moving direction side is defined as "downstream" with respect to a certain reference, and the case of being located on the opposite side to the moving direction is defined as "upstream".

In the present embodiment, the coating device may have at least a flow path, a spout, and a coating head on the downstream side of the spout.

As the liquid supply pump 110, various known types of pumps can be used. When the coating liquid 106 containing particles is considered, a diaphragm pump is preferable.

The pressure gauge 112 can use various types of pressure gauges known in the art. The filter filter 116 or the vacuum degassing device 114 can adopt an appropriate size depending on the composition of the coating liquid 106 or the like. As the flow meter 118, various known types of flow meters can be used, and a Coriolis type flow meter can be preferably used.

An example of a method of manufacturing an optical film using the manufacturing line 100 will be described.

A coating device having a slit die 104 of a coating head, a nozzle 10, and a pipe 60 for a flow path is prepared, and a coating liquid 106 containing particles is prepared and stored in the storage tank 108.

The web W is continuously fed from a reel around which the web W is wound, and static electricity from the web W is removed by a static eliminating device (not shown), and then the mesh is removed by a dust removing device (not shown). Foreign matter attached to the object W.

The back surface of the web W is wound around the backup roll 102, and the web W is continuously conveyed. The coating liquid 106 containing particles is supplied from the slit die 104 of the coating head to the surface of the web W that is continuously conveyed to form a coating film. Here, the coating film means a coating liquid which is formed on the surface of the web W to be controlled so as to have a desired film thickness.

The coating liquid 106 containing particles is pumped from the storage tank 108 to the slit die 104 by the liquid supply pump 110 for supplying a driving source for the coating liquid (fluid). The pressure-transmitted coating liquid 106 is supplied to the slit die 104 through the pipe 60 through the pressure gauge 112, the vacuum degassing device 114, the filter filter 116, and the nozzle 10.

The aggregate of the particles in the coating liquid 106 can be agglomerated by passing the coating liquid 106 containing the particles through the spout 10 of the present embodiment. As a result, it is possible to avoid the phenomenon that the particles of the coating liquid 106 are clogged in the slit of the slit die 104. Further, the particles can be uniformly dispersed in the coating film formed on the web W. An optical film having desired optical characteristics can be produced. It is possible to suppress the retention of particles in the nozzle 10, and it is possible to suppress malfunction due to retention.

The spout 10 is preferably disposed on the upstream side closest to the slit die 104. For example, it is preferably disposed at a distance within 1000 mm from the liquid supply port of the slit die 104. The coating liquid 106 can be supplied to the slit die 104 before the particles in the coating liquid are reaggregated.

Next, the web W on which the coating film is formed is continuously conveyed toward the treatment zone 120. The treatment zone 120 includes a step of drying and/or hardening the coating film formed on the web W. For example, the step of drying the coating film means a step of removing water, a solvent, or the like from the coating film by various drying methods such as a convection drying method using hot air or a radiation drying method using radiant heat such as infrared rays. In addition, the step of curing the coating film means that the coating film is irradiated with an active line such as an ultraviolet ray, an electromagnetic wave or a particle line to cause a crosslinking reaction, a polymerization reaction or the like of the compound contained in the coating film to increase the hardness of the coating film.

The web W having a dried and/or hardened coating film is wound into a roll shape.

A method of producing a general optical film will be described. However, by changing the type of the coating liquid supplied to the mesh W, it is possible to manufacture an optical compensation film, an anti-glare film, an anti-glare anti-reflection film, and the like in terms of an optical film. Membrane.

The materials used for the optical film will be described.

The mesh means a flexible continuous strip-shaped member having a small film thickness, and a resin film is preferably used. Examples of the polymer constituting the resin film include deuterated cellulose (for example, cellulose triacetate, cellulose diacetate, TAC-TD80U, TD80UF, etc., manufactured by Fujifilm Co., Ltd.), and polydecylamine. , polycarbonate, polyester (for example, polyethylene terephthalate, polyethylene naphthalate), polystyrene, polyolefin, norbornane (norbornane) resin (ARTON: trade name, manufactured by JSR), amorphous polyolefin (ZEONEX: trade name, manufactured by Japan ZEON Co., Ltd.), (meth)acrylic resin (Acrypet VRL20A: trade name The acryl-based resin containing a ring structure described in Japanese Laid-Open Patent Publication No. 2004-170464, or JP-A-2006-171464, and the like. Among them, preferred are cellulose triacetate, polyethylene terephthalate, and polyethylene naphthalate, and particularly preferred is cellulose triacetate.

The coating liquid contains at least a solvent and particles. In addition to this, a binder polymer may also be included. The viscosity of the coating liquid is, for example, 0.5 to 20 mPa·s. The viscosity of the coating liquid can be measured at 25 ° C using a vibrating viscometer (manufactured by A&D Co., Ltd., model: SV-1A).

As a solvent, an organic solvent is mentioned, for example. As the organic solvent, for example, methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, second butanol, third butanol, isoamyl alcohol, and 1 may be mentioned. - pentanol, n-hexanol, methylpentanol, etc.; in the ketone system, methyl isobutyl ketone, methyl ethyl ketone, diethyl ketone, acetone, cyclohexanone, diacetone alcohol, etc. In terms of ester system, methyl acetate, ethyl acetate, n-propyl acetate, isopropyl acetate, isobutyl acetate, n-butyl acetate, isoamyl acetate, n-amyl acetate, propionic acid can be mentioned. Methyl ester, ethyl propionate, methyl butyrate, ethyl butyrate, methyl acetate, methyl lactate, ethyl lactate, etc.; in terms of ether and acetal, 1,4-dioxane , tetrahydrofuran, 2-methylfuran, tetrahydropyran, diethyl acetal, etc.; in terms of hydrocarbon system, hexane, heptane, octane, isooctane, light petroleum, cyclohexane, Methylcyclohexane, toluene, xylene, ethylbenzene, styrene, divinylbenzene, etc.; in terms of halocarbons, Carbon chloride, chloroform, dichloromethane, dichloroethane, 1,1,1-trichloroethane, 1,1,2-trichloroethane, trichloroethylene, tetrachloroethylene, 1,1,1 , 2-tetrachloroethane, etc.; in terms of polyols and their derivatives, ethylene glycol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monoacetate , diethylene glycol, propylene glycol, dipropylene glycol, butanediol, hexanediol, 1,5-pentanediol, glycerol monoacetate, glycerol ether, 1,2,6-hexanetriol Examples of the fatty acid system include formic acid, acetic acid, propionic acid, butyric acid, isobutyric acid, isovaleric acid, and lactic acid; and examples of the nitride system include formamide, N, N- Examples of the sulfur compound system include dimethylformamide, acetamidine, and the like.

Among the organic solvents, methyl isobutyl ketone, methyl ethyl ketone, cyclohexanone, acetone, toluene, xylene, ethyl acetate, 1-pentanol and the like are particularly preferred. Further, in the organic solvent, an alcohol or a polyol solvent can be appropriately used for the purpose of controlling the aggregation property. These organic solvents may be used singly or in combination, and the total amount of the organic solvent in the coating composition is preferably from 20% by mass to 90% by mass, more preferably from 30% by mass to 80% by mass, most preferably Contains 40% by mass to 70% by mass. In order to stabilize the surface shape of the particle-containing layer, it is preferred to use a solvent having a boiling point of less than 100 ° C and a solvent having a boiling point of 100 ° C or more. Further, the solvent is not limited to an organic solvent.

The particles contained in the coating liquid mean particles having a volume average particle diameter of 0.05 to 100 μm. As the particles contained in the coating liquid, for example, crosslinked polymethyl methacrylate, crosslinked methyl methacrylate-styrene copolymer, crosslinked methyl methacrylate-acrylic acid can be preferably mentioned. Ester copolymer particles, crosslinked acrylate-styrene copolymer Resin particles such as particles, crosslinked polystyrene particles, crosslinked methyl methacrylate-crosslinked modified acrylate copolymer particles, melamine resin particles, and benzoguanamine formaldehyde resin particles. Among them, crosslinked polymethyl methacrylate, crosslinked methyl methacrylate-styrene copolymer, and the like are preferred.

As an example of the above-mentioned particles, commercially available resin particles can be used, and for example, Chemisnow (registered trademark), MX600, MX675, RX0855, MX800, SX713L, MX1500H, etc., manufactured by Ivy Research Chemical Co., Ltd., or a finished product can be used. TECHPOLYMER (trade name) made by industrial (stock), SSX108HXE, SSX108LXESSX-106TN, SSX-106FB, XX120S, etc.

The following substances can be contained in the coating liquid.

The binder polymer forming the matrix is not particularly limited, and is preferably a light-transmitting binder polymer having a saturated hydrocarbon chain or a polyether chain as a main chain after being cured by ionizing radiation or the like. Further, it is preferred that the main binder polymer after hardening has a crosslinked structure. Further, the binder polymer is preferably an antiglare layer (solid content) and is composed of 55 to 94% by mass. More preferably, it is 75 to 90% by mass.

As the binder polymer having a saturated hydrocarbon chain as a main chain after hardening, an ethylenically unsaturated monomer selected from the first group of compounds described below and polymers thereof are preferred. Further, as the polymer having a polyether chain as a main chain, an epoxy-based monomer selected from the following second group of compounds and a polymer obtained by ring-opening are preferable. Further, polymers of a mixture of these monomers are also preferred.

The polymerization initiator is used in an amount of 0.1 to 15 parts by mass, more preferably 1 to 10 parts by mass, based on 100 parts by mass of the above monomer, based on the total amount of the polymerization initiator.

Next, a liquid feeding device using the nozzle of the present embodiment will be described with reference to Fig. 3 . The same components as those shown in FIG. 2 are denoted by the same reference numerals, and the description thereof will be omitted. The fluid 202 containing the particles is stored in the storage tank 108. The storage tank 108 and the second storage tank 130 are in fluid communication with the piping 60 that passes through the flow path. In the liquid supply device 200, between the storage tank 108 and the second storage tank 130, the liquid supply pump 110, the pressure gauge 112, the vacuum degassing device 114, the filtration filter 116, and the flow rate are provided from the upstream side to the downstream side. The gauge 118 and the spout 10 are provided in a part of the pipe 60. Further, the liquid supply device may have at least a flow path, a spout, and a drive source.

Here, the pipe 60 serves as a flow path through which the fluid 202 containing the particles passes. If the fluid 202 containing particles can pass, the material, shape, and the like of the flow path are not limited.

The fluid 202 containing the particles is pumped from the storage tank 108 to the second storage tank 130 by the liquid supply pump 110 for supplying the driving source for the fluid. The pressure-transmitted fluid 202 is supplied to the second storage tank 130 through the pipe 60 through the pressure gauge 112, the vacuum degassing device 114, the filtration filter 116, and the nozzle 10.

The agglomerates of the particles in the fluid 202 can be agglomerated by passing the fluid 202 containing the particles through the spout 10 of the present embodiment. As a result, the fluid 202 in which the particles are dispersed can be obtained.

The liquid supply pump 110 is exemplified as the drive source for the transport fluid, but the type of the pump is not limited. Further, as the driving source, not only the pump, but also the storage tank 108 can be disposed at a high position, and the potential energy can be used as a driving source for the transporting fluid. Here, the liquid supply means that the fluid containing the particles moves through the flow path.

Examples of the fluid containing the particles include a paint containing a pigment, an ink containing a pigment, a magnetic tape coating containing magnetic fine particles, a water repellent containing Teflon fine particles (a trademark of Teflon), and a food containing latex. , cosmetics containing latex, etc.

By passing the illustrated fluid containing particles through the spout of the present embodiment, the aggregates of the particles can be agglomerated. In addition, the retention of particles can be suppressed.

Fluid means a gas or a liquid. Further, the particles mean particles having a volume average particle diameter of 0.05 to 100 μm.

[Examples]

Hereinafter, the present invention will be further specifically described by way of examples. The materials, manufacturing conditions and the like shown in the following examples can be appropriately changed without departing from the gist of the invention. Therefore, the scope of the present invention is not limited to the following specific examples.

[Test 1]

To a mixed solvent of 1000 g of methyl ethyl ketone and methyl isobutyl ketone (mixing ratio: 11:89), 3 g of crosslinked acrylate-styrene copolymer particles having a volume average particle diameter of 2.8 μm were added, and the preparation was carried out as The fluid of the particle.

At a flow rate of 1 (kg/min), the prepared fluid is passed through a diameter reduction angle of 110° (angle α of the reduced diameter surface), a narrow path length of 0 mm, a length of the reduced diameter portion of 20 mm, and a diameter-expanding minister of 150 mm. The spout of the shape of the diameter, the angle of expansion of 7° (the angle β of the diameter of the secondary side inner wall), the radius of curvature r of 4 mm, and the reduction ratio of 7% (diameter of the narrow opening/diameter of the inflow opening × 100) .

[Experiment 2~21]

The fluid used in the test 1 was passed through the nozzle of the shape described in the table of Fig. 4 . The same conditions as in Test 1 were set except that the shape of the nozzle was changed.

(Evaluation)

The evaluation was carried out by the following effects of deagglomeration, presence or absence of retention, and comprehensive evaluation, and the evaluation was described in each item of the table of Fig. 4.

(the effect of deagglomeration)

The size of the aggregate of particles after passing the fluid through the spout and passing the fluid through the spout is compared. The size of the aggregate was observed by observing the liquid dropped on the microscopic plate with an optical microscope. Specifically, the fluid was photographed with a microscope, and the long side of the aggregate was measured from the obtained photograph as the size of the aggregate. The size of the aggregate before deaggregation was determined in the following manner. Ten aggregates were randomly selected from the coating liquid before passing through the nozzle, and the long sides of each aggregate were measured. The average value of the long sides is set to the size of the aggregate before deaggregation.

Similarly, the size of the aggregate after deagglomeration was determined in the following manner. Ten aggregates were randomly selected from the fluid passing through the spout, and the long sides of each aggregate were measured. The average value of the long sides is set to the size of the aggregate after deagglomeration.

The effect of deagglomeration was evaluated in the following three stages in the ratio of the size of the agglomerated (the size of the aggregate/the size of the aggregate before deagglomeration) × 100.

A: The ratio of the size of the aggregate after deagglomeration to the size of the aggregate before deaggregation is 5% or less.

B: The ratio of the size of the aggregate after deagglomeration to the size of the aggregate before deaggregation is 20% or less.

C: The ratio of the size of the aggregate after deagglomeration to the size of the aggregate before deagglomeration is greater than 20%.

(with or without detention)

The flow velocity distribution based on CFD (Computational Fluid Dynamics) simulation was used to observe whether or not particles were retained in the reduced diameter portion of the nozzle. STAR-LT (manufactured by CD-adapco Japan Co., Ltd.) was used as the software for CFD simulation, and a commercially available general-purpose personal computer was used as the hardware. For the presence or absence of retention, the following three stages were evaluated. Here, the failure means a grain failure or a point defect on the optical film due to aggregation of the particles. For line faults or point defects, the test is performed by visual inspection, and the surface inspection machine (automatic camera inspection machine) is used for inspection on the manufacturing machine.

A: No stagnation, no faults.

B: Although it is easy to stay, it is a level without problems.

C: There is a detention and there is a possibility of failure.

(Overview)

Considering the effect of deagglomeration and the presence or absence of retention, the manufacturing suitability is evaluated in the following three stages.

A: Better (the effect of deagglomeration and the presence or absence of retention are A).

B: Can be used (the effect of deagglomeration, and whether or not there is retention is B or more, excluding comprehensive evaluation as A).

C: Not applicable (the effect of deagglomeration and the presence or absence of retention are C).

(Evaluation results)

As shown in the tests 2 to 5, 8 to 11, 14, 15, 18, and 19 of the table of Fig. 4, the fluid containing the particles was passed through a reduction angle α of 120 to 180°, a narrow path length of 0 mm, and 2 When the diameter expansion angle β of ~10°, the radius of curvature r of 1 to 10 mm, and the orifice of the reduction ratio of 7 to 18% are obtained, a comprehensive evaluation of B or more is obtained.

As seen in tests 3 and 4 in tests 2 to 5, when the narrow path length, the expanded diameter angle β, the radius of curvature r, and the reduction ratio are set to be constant, it can be set to 130 to 170°. The reduction angle α is used to obtain a comprehensive evaluation of A.

As seen in tests 9 and 10 in Tests 8 to 11, when the diameter reduction angle α, the narrow path length, the radius of curvature r, and the reduction ratio are set to be constant, it can be set to 5 to 8°. The expansion angle β is used to obtain a comprehensive evaluation of A.

As seen in tests 4 and 18 of Tests 4, 18, and 19, when the diameter reduction angle α, the narrow path length, the diameter expansion angle β, and the radius of curvature r are set to be constant, A comprehensive evaluation of A is obtained for a reduction ratio of 7 to 14%.

On the other hand, in the case where the test 1 and 6 exceed the range of the reduction angle α of 120 to 180°, the evaluation of the deagglomeration effect is C. In the case where the test 7 and 12 exceed the range of the diameter expansion angle β of 2 to 10°, the evaluation of the deagglomeration effect is C. When the test 13 and 16 exceeded the range of the curvature radius r of 1 to 10 mm, the evaluation of the deagglomeration effect was B, and the presence or absence of the retention was evaluated as C. In the case where the tests 17 and 20 exceeded the range of the reduction ratio of 7 to 18%, the evaluation of the deagglomeration effect was C. In the case where there is a narrow path as in Test 21, the evaluation of the deagglomeration effect is C. It is speculated that re-aggregation occurred while passing through the narrow road.

10‧‧‧ spout

12‧‧‧ spout body

14‧‧‧Inflow opening

16‧‧‧Narrow opening

18‧‧‧First side inner wall

20‧‧‧ Reduced diameter

22‧‧‧ Surface

24‧‧‧Reducing surface

26‧‧‧ Outflow opening

28‧‧‧second side inner wall

30‧‧‧Extended section

32‧‧‧One side flange

34‧‧‧ditch

36‧‧‧second side flange

38‧‧‧ditch

60‧‧‧Pipe

ID1~ID3‧‧‧ Diameter

OD‧‧‧OD

α, β‧‧‧ angle

Claims (7)

a spout having: a spout body; an inflow opening on the inflow side of the spout body; an outflow opening on the outflow side of the spout body; and a reduced diameter portion formed on the primary side inner wall, the primary side inner wall having the same a curved surface having a radius of curvature of 1 to 10 mm continuously flowing into the opening, and a reduced diameter surface which is continuous from the curved surface and reduced in diameter to a narrow opening at an angle of 120 to 180°; and the enlarged diameter portion is formed on the inner wall of the secondary side, The secondary side inner wall extends from the narrow opening to the outflow opening and expands at an angle of 2 to 10 degrees, and the ratio of the diameter of the narrow opening to the diameter of the inflow opening is 0.07 to 0.18. The nozzle of claim 1, wherein the diameter of the reduced diameter surface of the primary side inner wall is 130 to 170 degrees. The nozzle of claim 1 or 2, wherein the secondary side inner wall has an expanded diameter of 5 to 8 degrees. The spout of claim 1 or 2, wherein the ratio of the diameter of the narrow opening to the diameter of the inflow opening is 0.07 to 0.14. A liquid supply device comprising: a flow path for passing a fluid containing particles; a spout according to any one of claims 1 to 4, disposed at a portion of the flow path for the fluid to pass; and a drive source for The fluid is sent to the flow path and the spout. A coating device comprising: a flow path through which a coating liquid containing particles is passed; a nozzle according to any one of claims 1 to 4, disposed in a part of the flow path for the coating liquid to pass; and a coating head disposed on The downstream side of the spout. A method for producing an optical film, comprising the steps of: supplying a coating liquid containing particles from a coating device as claimed in claim 6 to a mesh which is continuously conveyed to form a coating film; and drying the coating film, and/or Or harden.