KR20170057642A - Fliter with MD-direction different basis weights and method for manufacturing the same - Google Patents

Abstract

The present invention relates to a filter including a nanofiber, and more particularly, to a filter comprising a two-component base material and an epoxy resin-curing agent-polymer and having a different basis weight on the same plane in the longitudinal direction of the base material, ≪ / RTI >

Description

[0001] The present invention relates to a filter having different weights of nanofibers in the MD direction and an electrospinning apparatus for manufacturing the same,

The present invention relates to a filter including nanofibers, and more particularly to a filter comprising a nanofiber including an epoxy resin-curing agent and a polymer on a substrate and having a different basis weight on the same plane in the longitudinal direction of the substrate, The present invention relates to an electrospinning device.

BACKGROUND ART Conventionally, in order to prevent permeation of gas such as water vapor or oxygen in the field of foods, packaging materials, medicines, etc., a gas having a relatively simple structure in which an inorganic film such as a vapor deposition film of metal or metal oxide is formed on the surface of a resin substrate Barrier films have been used.

Recently, a gas barrier film preventing the permeation of water vapor and oxygen has been used in the field of electronic devices such as a liquid crystal display (LCD), a solar cell (PV), and an organic electroluminescence (EL) . That is, it is necessary to give such an electronic device a property of being flexible and light and hard to break, and a gas barrier film having the above properties is used.

Electronic devices based on nanofibers are still conceptual steps, but they have a wide surface area, a variety of surface treatments, the ease of compositing composites, It is necessary to make a fibrous structure to give flexibility. Therefore, the manufacture of transparent mat composed of nanofibers excellent in flexibility is likely to substitute many electronic devices market because of its ease of imparting electronic performance and various advantages. Examples of possible fiber-based electronic devices include textile solar cells, flexible transistors, flexible displays, external stimulus drug delivery, biosensors and gas sensors, light control functional textiles, functional apparel and functional products for the defense industry .

As a measure for obtaining a gas barrier film applicable to an electronic device, a method of forming an inorganic film thickened on a resin base can be mentioned. However, simply by thickening the inorganic film, defects such as cracks are liable to occur in the inorganic film, and sufficient gas barrier property can not be obtained. Therefore, a gas barrier film formed by using an organic film as an adhesive layer, specifically, a gas barrier film formed by alternately laminating a unit including an inorganic film and an organic film on a resin substrate in order to prevent a crack from occurring in the thickened inorganic film Film has been proposed.

Many efforts have been made to form networks with new types of fiber-like materials that are ideal for replacing existing materials in high-performance next-generation devices such as solar cells, touch screens, skin-like sensors, displays and smart windows However, it is not easy to produce a mat composed of transparent nanofiber.

Disclosure of the Invention The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to provide a method and a device for separating a radiation section into at least two or more sections and continuously spraying an epoxy resin and a curing agent in a nozzle block, A nozzle tube body having a plurality of nozzles in the form of pins in the lengthwise direction of the collector supplied in the unit of the electrospinning device and capable of varying the number of the divided radiation spaces or the distance of the radiation section is arranged, It is possible to control the supply amount of the polymer spinning solution supplied to the nozzle body and to control the amount of spinning solution of the polymer spinning solution that is electrospun through each nozzle, thereby making it possible to manufacture a filter suitable for the required product characteristics, It is an object of the present invention to provide a filter capable of reducing the overall cost and an electrospinning device for manufacturing the same. .

The present invention relates to a substrate; And an epoxy resin on the substrate; Curing agent; And a nanofiber layer formed by electrospinning a mixed solution obtained by mixing one polymer selected from the group consisting of a hydrophilic polymer, a hydrophobic polymer, and a heat-resistant polymer, wherein the nanofiber layer has a different basis weight The filter being characterized in that:

At this time, it is preferable that the curing agent is one selected from the group consisting of an amine curing agent, an acid anhydride curing agent and an imidazole curing agent.

The present invention also provides a filter characterized in that the mixed solution is electrospun through a temperature controller at a temperature of 50 to 100 ° C.

Here, the viscosity of the mixed solution is adjusted to 1,000 to 3,000 cps through the temperature controller.

The hydrophilic polymer is one selected from the group consisting of polyvinyl alcohol, polyethersulfone, polyacrylonitrile, polyamide and hydrophilic polyurethane. The hydrophobic polymer is polyimide or meta-aramid, and the heat-resistant polymer is poly Vinylidene fluoride, a hydrophobic polyester, and a hydrophobic polyurethane.

The method of manufacturing a filter according to the present invention can simplify and simplify the manufacturing process of the filter, thereby reducing the manufacturing cost and manufacturing time.

Further, since the filter according to the present invention includes an epoxy resin as a thermosetting resin, when a certain heat is applied, the filter reacts with the curing agent to cause curing. Accordingly, the filter can be used as a repair adhesive such as a torn filter or a nonwoven fabric after applying a certain amount of heat.

In addition, a nozzle tube body having a plurality of nozzles in the form of a pin in the longitudinal direction of the collector supplied in the unit of the electrospinning device is arranged, the supply amount of the polymer solution to be supplied to each nozzle body is controlled, It is possible to obtain a filter having different basis weights on the same plane in the longitudinal direction of the substrate by adjusting the spinning amount of the electrospun polymer spinning solution.

1 is a side view schematically showing an electrospinning apparatus according to the present invention,
2 is a side sectional view schematically showing a nozzle of a nozzle block installed in each unit of the electrospinning apparatus according to the present invention,
3 is a side cross-sectional view schematically showing another embodiment according to a nozzle of a nozzle block installed in each unit of the electrospinning apparatus according to the present invention,
4 is a plan view schematically showing a nozzle block installed in each unit of the electrospinning apparatus according to the present invention,
5 is a front sectional view schematically showing a state in which an electric heater is installed in a nozzle block installed in each unit of the electrospinning apparatus according to the present invention,
6 is a sectional view taken along line A-A '
7 is a front sectional view schematically showing another embodiment in which an electric heater is installed in a nozzle block installed in each unit of the electrospinning apparatus according to the present invention,
8 is a sectional view taken along the line B-B '
Fig. 9 is a front sectional view schematically showing another embodiment of a state in which an electric heater is installed in a nozzle block installed in each unit of the electrospinning apparatus according to the present invention, Fig.
10 is a sectional view taken along line C-C '
11 is a view schematically showing an auxiliary transfer device of an electrospinning device according to the present invention,
12 is a view schematically showing another embodiment of the auxiliary belt roller of the auxiliary transfer device of the electrospinning apparatus according to the present invention,
FIG. 13 to FIG. 16 are side views schematically showing the operation of the long sheet conveying speed adjusting apparatus of the electrospinning apparatus according to the present invention,
17 is a plan view schematically showing another embodiment according to the nozzle body arranged in the nozzle block of the electrospinning apparatus according to the present invention,
18 is a perspective view schematically showing another embodiment according to the nozzle body arranged in the nozzle block of the electrospinning apparatus according to the present invention,
19 is a side view schematically showing another embodiment according to a nozzle body arranged in a nozzle block of the electrospinning apparatus according to the present invention,
20 and 21 show an operation process (in FIG. 20, a nozzle in which a nozzle indicated by a broken line is closed in FIG. 20) is irradiated through a nozzle of each nozzle tube of the electrospinning apparatus according to the present invention, And the nozzle indicated by the broken line in Fig. 21 is located at the lower portion of the substrate), which is a plan view schematically showing another embodiment,
22 is a plan view schematically showing another embodiment according to a nozzle body arranged in a nozzle block of the electrospinning apparatus according to the present invention,
23 is a perspective view schematically showing another embodiment according to the nozzle body arranged in the nozzle block of the electrospinning apparatus according to the present invention,
FIG. 24 and FIG. 25 are plan views schematically showing another embodiment according to an operation process of electrospinning the epoxy resin and the curing agent on the same plane of the substrate through the nozzles of each nozzle tube of the electrospinning apparatus according to the present invention,
26 is a schematic view showing a filter comprising a substrate of the present invention and a nanofiber including an epoxy resin-curing agent and a polymer,
Figures 27 and 28 are plan views of filters with different weights in MD direction produced by the present invention.

Hereinafter, the present invention will be described.

The present invention is not limited to the scope of the present invention, but is merely an example, and various modifications can be made without departing from the technical gist of the present invention.

The present invention relates to a substrate; And an epoxy resin on the substrate; Curing agent; And a nanofiber layer formed by electrospinning a mixed solution obtained by mixing one polymer selected from the group consisting of a hydrophilic polymer, a hydrophobic polymer, and a heat-resistant polymer, wherein the nanofiber layer has a different basis weight The filter being characterized in that:

At this time, the epoxy resin is an intermediate of a thermosetting resin and forms a three-dimensional network structure insoluble / infusible by reaction with a curing agent to exhibit physical properties inherent to epoxy, and the epoxy resin is adhered It has an advantage of being excellent in properties, mechanical strength, heat resistance, chemical resistance, water resistance, electric insulation property, moldability and impregnation property, easy production of a composite material, and realizing various properties according to the selection of a curing agent.

Nonlimiting examples of such epoxy resins include bisphenol A type epoxy resins, bisphenol F type epoxy resins, and bisphenol S type epoxy resins.

The above-mentioned bisphenol A type epoxy resin is represented by the following general formula (1), and the most commonly used epoxy resin is produced by a direct method or indirect method.

[Chemical Formula 1]

The bisphenol F type epoxy resin is represented by the following general formula (2) and is produced by the reaction of bisphenol F with ECH. The bisphenol F type epoxy resin has a lower viscosity than the bisphenol A type epoxy resin and theoretically has a somewhat lower mechanical and physical properties. And the like.

(2)

The bisphenol S type epoxy resin is represented by the following general formula (3), and is generally used for rapidly curing an epoxy adhesive and used as a reactant in a polymer reaction.

(3)

On the other hand, the curing agent is preferably one selected from the group consisting of an amine curing agent, an acid anhydride curing agent and an imidazole curing agent, but is not limited thereto.

Non-limiting examples of the amine-based curing agent include aliphatic polyamines, modified aliphatic polyamines, aromatic amines, tertiary amines, and secondary amines.

Examples of the aliphatic polyamines include diethylene triamine (DETA), triethylene tetramine (TETA), diethylamino propyl amine (DEAPA), Menthane diamine (MDA), N-aminoethyl piperazine Isophorone diamine (IPDA), but is not limited thereto.

Examples of the modified aliphatic polyamines include, but are not limited to, Epoxy Polyamine Adduct, Ethylene or Propylene Oxide, Polyamine adduct, Cyanoethylated Polyamine, and Ketone blocked Polyamine (Ketimine).

Examples of the aromatic amine include Meta phenylene Diamine (MPD), 4.4 'Dimethyl aniline (DAM or DDM), Diamino Diphenyl Sulfone (DDS), and Aromatic amine adduct.

Examples of the acid anhydride-based curing agent include polyamide (PA), tetrahydrophthalic anhydride (THPA), methyl tetrahydrophthalic anhydride (MTHPA), hexahydrophthalic anhydride (HHPA), and MNA.

Nonlimiting examples of the imidazole-based curing agent include 2MZ and 2E4MZ.

In addition, the mixed solution may further include a curing accelerator.

The curing accelerator used in the present invention is not particularly limited as long as it is a curing accelerator generally used for accelerating the curing of the epoxy compound. Examples thereof include tertiary amines, tertiary amine salts, imidazoles, Quaternary ammonium salts, quaternary phosphonium salts, organic metal salts, and boron compounds. The curing accelerator may be used alone or in combination of two or more.

Examples of tertiary amines include lauryldimethylamino, N, N-dimethylcyclohexylamine, N, N-dimethylbenzylamine, N, N-dimethylaniline, (N, N- dimethylaminomethyl) (N, N-dimethylaminomethyl) phenol, 1,8-diazabicyclo [5.4.0] undecene-7 (DBU), 1,5-diazabicyclo [4.3.0] 5 (DBN).

Examples of the tertiary amine salt include a carboxylate, a sulfonate, and an inorganic acid salt of the above-mentioned tertiary amine. Examples of the carboxylate include salts of carboxylic acids having 1 to 30 carbon atoms (especially 1 to 10 carbon atoms) such as octylate (particularly fatty acid salts). Examples of the sulfonic acid salt include p-toluenesulfonic acid salt, benzenesulfonic acid salt, methanesulfonic acid salt and ethanesulfonic acid salt. Representative examples of tertiary amine salts include salts of 1,8-diazabicyclo [5.4.0] undecene-7 (DBU) (for example, p-toluenesulfonic acid salt and octylic acid salt).

Examples of the metal-based curing accelerator include organic metal complexes or organic metal salts of metals such as cobalt, copper, zinc, iron, nickel, manganese and tin. Specific examples of the organometallic complexes include organic cobalt complexes such as cobalt (II) acetylacetonate and cobalt (III) acetylacetonate, organic copper complexes such as copper (II) acetylacetonate, zinc An organic iron complex such as an organic zinc complex and iron (III) acetylacetonate, an organic nickel complex such as nickel (II) acetylacetonate, and an organic manganese complex such as manganese (II) acetylacetonate. Examples of the organic metal salt include zinc octylate, tin octylate, zinc naphthenate, cobalt naphthenate, stannous stearate and zinc stearate. As the metal curing accelerator, cobalt (II) acetylacetonate, cobalt (III) acetylacetonate, zinc (II) acetylacetonate, zinc naphthenate and iron (III) acetylacetonate are preferable from the viewpoints of curability and solvent solubility And particularly, cobalt (II) acetylacetonate and zinc naphthenate are preferable. The metal-based curing accelerator may be used singly or in combination of two or more.

 The addition amount of the metal-based curing accelerator is preferably in the range of from 25 to 500 ppm, more preferably from 40 to 200 ppm, of the metal based on the metal-based curing accelerator when the non-volatile content in the resin composition is 100 mass% . If it is less than 25 ppm, it tends to make it difficult to form a conductor layer having a low roughness with good adhesion to the surface of the insulating layer. When it exceeds 500 ppm, the storage stability and insulating property of the resin composition tend to be lowered.

Examples of the quaternary ammonium salt include tetraethylammonium bromide and tetrabutylammonium bromide.

 As the quaternary phosphonium salt, for example, the following formula (1)

(Wherein R1, R2, R3 and R4 are the same or different and each represents a hydrocarbon group of 1 to 16 carbon atoms, and X represents an anion residue of a carboxylic acid or an organic sulfonic acid).

 Examples of the hydrocarbon group having 1 to 16 carbon atoms include a linear or branched hydrocarbon group such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, s-butyl, t-butyl, pentyl, A straight chain alkyl group; Vinyl, allyl, crotyl group, etc.

A straight chain or branched alkenyl group; Aryl groups such as phenyl, toluyl, xylyl, naphthyl, anthryl, phenanthryl groups; And aralkyl groups such as benzyl and phenethyl groups. Of these, a straight or branched alkyl group having 1 to 6 carbon atoms, particularly a butyl group, is preferred.

 Examples of the "carboxylic acid" in the "anion residue of a carboxylic acid or an organic sulfonic acid" include aliphatic alcohols having 1 to 20 carbon atoms such as octanoic acid, decanoic acid, lauric acid, myristic acid and palmitic acid Monocarboxylic acids; 1,2,4,5-cyclohexanetetracarboxylic acid, bicyclo [2.2.1] heptane-2,3-dicarboxylic acid, methylbicyclo [2.2.1] heptane-2,3-dicarboxylate Alicyclic carboxylic acids (monocyclic alicyclic mono- or polycarboxylic acids, crosslinked cyclic mono- or polycarboxylic acids), and the like. The alicyclic carboxylic acid may have a substituent such as a linear or branched alkyl group having 1 to 4 carbon atoms such as a methyl group, an alkoxy group having 1 to 4 carbon atoms such as a methoxy group, or a halogen atom such as a chlorine atom It is possible. As the carboxylic acid, an aliphatic monocarboxylic acid having a carbon number of 10 to 18 and an alicyclic polycarboxylic acid having a carbon number of 8 to 18 are preferable.

Examples of the "organic sulfonic acid" in the above "anionic residue of a carboxylic acid or an organic sulfonic acid" include methanesulfonic acid, ethanesulfonic acid, 1-propanesulfonic acid, 2-propanesulfonic acid, Aliphatic sulfonic acids such as pentanesulfonic acid, 1-hexanesulfonic acid, 1-octanesulfonic acid, 1-decanesulfonic acid and 1-dodecane sulfonic acid (for example, aliphatic sulfonic acids having 1 to 16 carbon atoms); Benzene sulfonic acid, 3- (linear or branched octadecyl) benzene sulfonic acid, 4- (straight or branched octyl) benzenesulfonic acid, 3- (linear or branched dodecyl Benzenesulfonic acid, 4-methoxybenzenesulfonic acid, 4-ethoxybenzenesulfonic acid, 4- (4-methoxybenzenesulfonic acid), 4- Chlorobenzene sulfonic acid, and the like.

Representative examples of quaternary phosphonium salts include tetrabutylphosphonium decanoate, tetrabutylphosphonium laurate, tetrabutylphosphonium myristate, tetrabutylphosphoniumpolate, tetrabutylphosphonium cation and bicyclo [2.2 .1] heptane-2,3-dicarboxylic acid and / or methylbicyclo [2.2.1] heptane-2,3-dicarboxylic acid, a salt of an anion of tetrabutylphosphonium cation with 1,2,4 , Salts of anions of 5-cyclohexanetetracarboxylic acid, salts of anions of tetrabutylphosphonium cation and methanesulfonic acid, salts of anions of tetrabutylphosphonium cation and benzenesulfonic acid, salts of tetrabutylphosphonium cation and p-toluenesulfonic acid Salts of anions of tetrabutylphosphonium cation and 4-chlorobenzenesulfonic acid, salts of anions of tetrabutylphosphonium cation and dodecylbenzenesulfonic acid, and the like.

Examples of the boron compound include boron trifluoride, triphenylborate, and the like.

 Examples of the imidazole-based curing accelerator include 2-methylimidazole, 2-undecylimidazole, 2-heptadecylimidazole, 1,2-dimethylimidazole, 2-methylimidazole, 1-benzyl-2-methylimidazole, 1-benzyl-2-methylimidazole, 2-methylimidazole, 1-cyanoethyl-2-undecylimidazole, 1-cyanoethyl-2-ethyl-4-methyl Imidazole, 1-cyanoethyl-2-phenylimidazole, 1-cyanoethyl-2-undecylimidazolium trimellitate, 1-cyanoethyl-2-phenylimidazolium trimellitate, 2,4-diamino-6- [2'-methylimidazolyl- (1 ')] - ethyl-s-triazine, 2,4- (1 ')] - ethyl-s-triazine, 2,4-diamino-6- [2'-ethyl-4'-methylimidazolyl- , 4-diamino-6- [2'-methylimidazolyl- (1 ')] -ethyl-s-triazine isocyanuric acid adduct, Methyl-2-phenyl-4-methyl-5-hydroxymethylimidazole, 2,3-dihydro-1H- Imidazole compounds such as pyrrolo [1,2-a] benzimidazole, 1-dodecyl-2-methyl-3-benzylimidazolium chloride, 2-methylimidazoline, And adducts of a thiol compound with an epoxy resin.

 Examples of amine curing accelerators include trialkylamines such as triethylamine and tributylamine; amines such as 4-dimethylaminopyridine, benzyldimethylamine, 2,4,6-tris (dimethylaminomethyl) phenol, 1,8-diazabicyclo (5,4,0) -undecene (hereinafter abbreviated as DBU), and the like.

The hydrophilic polymer may be one selected from the group consisting of polyvinyl alcohol, polyethersulfone, polyacrylonitrile, polyamide, and hydrophilic polyurethane. The hydrophobic polymer may be polyimide or meta-aramid. The heat- Vinylidene fluoride, hydrophobic polyester, and hydrophobic polyurethane, but is not limited thereto.

On the other hand, the filter is manufactured using an electrospinning device.

Hereinafter, the electrospinning device used in the present invention will be described with reference to Figs. 1 to 16. Fig.

FIG. 1 is a side view schematically showing an electrospinning apparatus according to the present invention, FIG. 2 is a side cross-sectional view schematically showing a nozzle of a nozzle block installed in each unit of the electrospinning apparatus according to the present invention, FIG. 4 is a cross-sectional view schematically showing a nozzle block provided in each unit of the electrospinning apparatus according to the present invention. FIG. 4 is a cross- 6 is a cross-sectional view taken along the line A-A 'in Fig. 7, and Fig. 7 is a cross-sectional view taken along line A-A' in Fig. Sectional view schematically showing another embodiment in which an electric heater is installed in a nozzle block installed in each unit of the electrospinning device according to the invention 9 is a front sectional view schematically showing another embodiment in which an electric heater is installed in a nozzle block installed in each unit of the electrospinning apparatus according to the present invention, FIG. 10 is a cross-sectional view taken along the line C-C 'of FIG. 10, FIG. 11 is a view schematically showing an auxiliary transfer device of the electrospinning apparatus according to the present invention, FIGS. 13 to 16 are side views schematically showing the operation of the long sheet conveying speed adjusting apparatus of the electrospinning apparatus according to the present invention.

As shown in the figure, an electrospinning device 1 according to the present invention comprises a bottom-up electrospinning device 1, at least one unit 10a or 10b is sequentially arranged at a predetermined interval, Each of the units 10a and 10b electrifies the same spinning liquid individually or electrospun fluids different in material to produce a filter.

To this end, each unit 10a includes an epoxy resin; Curing agent; And a polymer mixed with a polymer selected from the group consisting of a hydrophilic polymer, a hydrophobic polymer, and a heat-resistant polymer is filled in the main liquid tank 8 and the spinning liquid main tank 8, A nozzle block 11 for discharging a mixed solution filled in the spinning solution main tank 8 and a plurality of nozzles 12 in the form of a pin are arranged, And a voltage generator 14a and 14b for generating a voltage to the collector 13 and a collector 13 spaced apart from the nozzle 12 by a predetermined distance in order to accumulate the mixed solution injected from the nozzle 12 .

The electrospinning device 1 according to the present invention has a structure in which the mixed solution to be filled in the spinning liquid main tank 8 is introduced into the plurality of nozzles 12 formed in the nozzle block 11 through the metering pump And the mixed solution supplied is continuously radiated and focused on the collector 13 having a high voltage applied thereto through the nozzle 12 to form nanofibers on the long sheet 15 moved on the collector 13 And the formed nanofibers are made of filters.

The elongated sheet 15 (15a), which is supplied into the unit 10a in front of the unit 10a positioned at the tip of each unit 10a of the electrospinning device 1 and in which nanofibers are laminated by the injection of the mixed solution, And a winding roller 5 for winding the long sheet 15 on which the nanofibers are laminated is provided.

On the other hand, the elongated sheet 15, in which the mixed solution is laminated while passing through each unit 10a, uses a substrate selected from cellulose, two-component system, and polyterephthalate.

The cellulose base material used in the present invention is preferably composed of 100% cellulose, but cellulose having a total mass ratio of 70 to 90: 10 to 30 mass% of polyethylene terephthalate (PET) It is also possible to use a substrate having a cellulose base coated with a flame retardant coating.

The binary substrate may be selected from a sheath-core type, a side by side type, and a C-type type. In the sheath-core type two-component substrate, the sheath portion is a low-melting-point polyester and the core portion is a high-melting-point polyethylene terephthalate.

At this time, the material of the spinning solution to be radiated through each unit 10a of the electrospinning device 1 is not limited. In the present invention, a mixed solution is used for the unit 10a.

An epoxy resin supplied through the nozzle 12 in the unit 10a; Curing agent; And a polymer selected from the group consisting of a hydrophilic polymer, a hydrophobic polymer, and a heat-resistant polymer are dissolved in a suitable solvent, and the type of the solvent is also an epoxy resin; Curing agent; And a polymer capable of dissolving one kind of polymer selected from the group consisting of a hydrophilic polymer, a hydrophobic polymer and a heat-resistant polymer, and examples thereof include phenol, formic acid, sulfuric acid, m-cresol, thifluoroacetone and hydride Methyl ethyl ketone, methyl ethyl ketone, aliphatic hydroxyl group, m-butyl alcohol, isobutyl alcohol, isobutyl alcohol, isobutyl alcohol, isobutyl alcohol, isobutyl alcohol, Propylene glycol, diethylene glycol, ethylene glycol, halogen compounds such as trichlorethylene, dichloromethane, aromatic compounds such as toluene, toluene, and the like, , Xylene, cyclohexanone as aliphatic cyclic compound group, cyclohexane and ester group as n-butyl acetate, acetic acid Butyl, may be used ethoxy group salbeu aliphatic ether, ethyl 2-butyl-cells by ethanol, dimethylformamide-ethoxy ethanol, 2-amide, dimethylacetamide and the like, it may be used a mixture of a plurality kinds of solvents. The spinning solution preferably contains an additive such as a conductivity improver.

2, the nozzle 12 provided in the nozzle block 11 of the electrospinning apparatus 1 according to the present invention is composed of a multi-tubular nozzle 500, And two or more inner and outer tubes 501 and 502 are coupled in a sheath-core shape so as to be capable of simultaneously radiating electricity.

Here, the nozzle block 11 includes a nozzle plate 405 in which multiple tubular nozzles 500 formed in a sheath-core type multi-tubular shape are arranged and a nozzle plate 405 disposed at a lower end of the nozzle plate 405 Two or more spinning solution storage plates 407 and 408 for supplying a polymer spinning solution (not shown) to the multi-tubular nozzle 500, an overflow removing nozzle 415 surrounding the multi-tubular nozzle 500, An overflow liquid temporary storage plate 410 connected to the overflow removing nozzle 415 and positioned directly above the nozzle plate 405 and an overflow liquid storage plate 410 positioned above the overflow liquid temporary storage plate 410, And an overflow removing nozzle support plate 416 for supporting the removal nozzle 415 by the overflow removing nozzle 415.

An air supply nozzle 404 surrounding the multi-tubular nozzle 500 and the overflow removing nozzles 415 and an air supply nozzle 404 located at the uppermost end of the nozzle block 11 to support the air supply nozzle 404 An air inlet 413 located at the lower end of the support plate 414 of the supply nozzle and directly below the support plate 414 of the air supply nozzle for supplying air to the air supply nozzle 404 and an air storage 413 for storing the supplied air And a plate 411.

Further, an overflow outlet 412 for discharging the overflow liquid to the outside through the overflow removing nozzle 415 is provided.

In the embodiment of the electrospinning device 1 according to the present invention, the nozzle 12 is cylindrical, but as shown in FIG. 3, the nozzle 12 is formed as a wedge-shaped cylinder, And its distal end portion 503 is formed in the shape of a tubular trunk having an axis of 5 to 30 degrees.

Here, the tip portion 503 formed in the tubular shape is formed to be narrowed from the upper portion to the lower portion. However, the tip portion 503 may be formed in various other shapes as long as it is narrowed from the upper portion to the lower portion.

18 to 26, a nozzle body 112 according to an embodiment of the present invention will be described.

The nozzle block 111 of the electrospinning apparatus 100 is provided with a plurality of nozzle tubes 112 arranged in the longitudinal direction thereof and a nozzle for supplying a mixed solution containing an epoxy resin and a curing agent to the nozzle tube 112 At least one use liquid main tank 120 may be connected.

The nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, and 112i, which are linearly formed on the upper surface of the nozzle block 111 and have a plurality of nozzles 111a linearly, A plurality of nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h and 112i are arranged in the longitudinal direction of the substrate 115 in the longitudinal direction of the substrate 115, An epoxy resin filled in the spinning liquid main tank 120; Curing agent; And a polymer selected from the group consisting of a hydrophilic polymer, a hydrophobic polymer, and a heat-resistant polymer.

Here, the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, and 112i are connected to the spinning solution main tank 120 through a solution supply tube 121, A plurality of nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i and a spinning liquid main tank 120 are branched.

At this time, a supply amount adjusting means (not shown) is connected to the solution supply pipe 121, which is communicated to the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the spinning liquid main tank 120, And the supply amount adjusting means is composed of a supply valve 122.

A supply valve 122 is provided in the solution supply pipe 121 which is communicated to each nozzle body 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the spinning liquid main tank 120 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the spinning liquid main tank 120 by the supply valves 122, And controlled on-off systems.

That is, when the polymer spinning solution is supplied to the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i from the spinning solution main tank 120 through the solution supply tube 121, By the opening and closing of the supply valve 122 provided in the solution supply pipe 121 for supplying the main tank 120 and the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, The nozzle tubes 112b, 112d, 112f, 112g, 112h, 112i at specific positions among the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i arranged in the nozzle block 111 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i, 112f, 112g, 112h, 112i, 112f, 112h, 112h, 112h, The supply of the polymer solution is controlled and controlled.

For this purpose, the supply valve 122 is preferably controllably connected to a control unit (not shown). Preferably, the opening and closing of the supply valve 122 is automatically controlled by the control unit. However, It is also possible that the opening and closing of the supply valve 122 is manually controlled.

112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the spinning liquid main tank 120. However, The supply amount regulating means may be composed of various other structures and means, but is not limited thereto.

The solution supply pipe 121 is connected to the spinning solution main tank 120 and the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h and 112i, A supply valve 122 is provided to supply the mixed solution to the respective nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the spinning liquid main tank 120, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i, which are arranged in the nozzle block 111 by opening the specific supply valve 122 of the valve 122, 112b, 112d, 112f, 112g, 112h, 112i, or the nozzle tubes 112a, 112c (112c, 112d, 112b, 112c, 112d, 112 (112a, 112b, 112c, 112d, 112e) in the spinning liquid main tank 120 by the opening and closing of the supply valve 122, e, 112f, 112g, 112h, and 112i.

The mixed solution supplied to the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the spinning liquid main tank 120 through the solution supply tube 121 flows into the solution supply tube 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i through a nozzle supply pipe 125 communicated to the nozzles 121a, 121b.

That is, the nozzles 111a provided in the solution supply pipe 121 and the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h and 112i are provided as nozzle supply pipes 125, The supply pipe 125 is branched so as to correspond to the number of the nozzles 111a.

Here, the nozzle supply pipe 125 is provided with a dose adjusting means (not shown), and the dose adjusting means comprises a nozzle valve 126.

The supply of the mixed solution supplied to each nozzle 111a from the nozzle supply pipe 125 is individually controlled by the opening and closing of the nozzle valve 126 by providing the nozzle valve 126 as the radiation amount adjusting means The nozzle valve 126 is preferably controllably connected to a control unit (not shown), and the opening and closing of the nozzle valve 126 is automatically controlled by the control unit. However, It is also possible that the opening and closing of the nozzle valve 126 are manually controlled.

In an embodiment of the present invention, if the amount of the mixed solution radiated after the nozzle 112 is supplied to the nozzle 111a is easy to control and control, The adjusting means may be composed of various other structures and means, but is not limited thereto.

According to the structure described above, the solution supply pipe 121 and the nozzles 111a are connected to each other, and the nozzle valve 126 is provided in the nozzle supply pipe 125, A specific nozzle valve 126 among the plurality of nozzle valves 126 when the mixed solution is supplied to each nozzle 111a through each of the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, The mixed solution is electrospun selectively only in the nozzle 111a at a specific position among the nozzles 111a provided in the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, The specific nozzle valve 126 is closed so that the nozzle 111a at a specific position among the nozzles 111a provided in the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112b, 112c, 112d, 112e, 112f, 112f, 112f, 112f, 112f, 112f, 112f, 112f, 112g, 112h, and 112i, the supply of the polymer spinning solution supplied to each nozzle 111a is individually controlled and controlled.

In an embodiment of the present invention, the solution supply pipe 121 is provided with a supply valve 122 so that the nozzle tubes 112a, 112b, 112c, 112d and 112e of the nozzle block 111 in the spinning liquid main tank 120 112b, 112c, 112d, 112i, 112f, 112g, 112h, and 112i, and a nozzle valve 126 is provided in the nozzle supply pipe 125 to control the supply amount of the mixed solution supplied to the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112g, 112g, 112h, 112i, 112e, 112g, 112h, 112i, 112a and 112b are formed by stacking nanofibers having different weights in the longitudinal direction of the base material 115 by using mixed solution electromagnetically emitted from the respective nozzles 111a of the nozzle blocks 111, After the array is installed, the respective nozzles 111a are directly controlled and controlled individually to pass through the respective nozzles 111a The nanofibers having different basis weights may be laminated in the width direction of the substrate 115 by controlling and controlling the spinning amount of the mixed solution to be electrospun, but the present invention is not limited thereto.

The MD direction used in the present invention means a machine direction, and means a longitudinal direction corresponding to the progress direction in the case of continuous production of fibers such as a film or a nonwoven fabric, and the CD direction means a perpendicular direction to the CD direction as a cross direction . MD is also referred to as machine direction / longitudinal direction, and CD is referred to as width direction / transverse direction.

On the other hand, the electrospinning device 1 according to the present invention is provided with an overflow device 200. That is, each of the units 10a and 10b of the electrospinning device 1 is provided with a spinning liquid main tank 8, a second transfer pipe 216, a second transfer control device 218, an intermediate tank 220, And an overflow device 200 including a tank 230 are respectively provided.

Although the overflow device 200 is provided in each unit 10a and 10b of the electrospinning device 1 according to the embodiment of the present invention, any one of the units 10a and 10b, And the unit 10b located at the rear end of the overflow device 200 may be integrally connected to the overflow device 200. In this case,

According to the structure as described above, the spinning liquid main tank 8 stores spinning solution to be a raw material of the nanofibers. The spinning liquid main tank 8 is provided therein with an agitating device 211 for preventing separation or coagulation of the spinning solution.

The second transfer pipe 216 is composed of a pipe connected to the spinning liquid main tank 8 or the regeneration tank 230 and valves 212 213 and 214, The spinning liquid is transferred from the tank 230 to the intermediate tank 220.

The second conveyance control device 218 controls the conveyance operation of the second conveyance pipe 216 by controlling the valves 212, 213 and 214 of the second conveyance pipe 216. The valve 212 controls the transfer of the spinning liquid from the spinning liquid main tank 8 to the intermediate tank 220 and the valve 213 is used to transfer the spinning liquid from the regeneration tank 230 to the intermediate tank 220. [ . The valve 214 controls the amount of the epoxy resin and the curing agent flowing into the intermediate tank 220 from the spinning liquid main tank 8 and the regeneration tank 230.

The control method as described above is controlled according to the liquid surface height of the spinning liquid measured by the second sensor 222 provided in the intermediate tank 230 to be described later.

The intermediate tank 220 stores the spinning solution supplied from the spinning liquid main tank 8 or the regeneration tank 230 and supplies the spinning solution to the nozzle block 11 and adjusts the liquid surface height of the spinning solution And a second sensor 222 for measuring the temperature.

The second sensor 222 may be a sensor capable of measuring the liquid level height, and is preferably formed of, for example, an optical sensor or an infrared sensor.

A supply pipe 240 and a supply control valve 242 for supplying a spinning solution to the nozzle block 11 are provided in the lower part of the intermediate tank 220. The supply control valve 242 is connected to the supply pipe 240 And the like.

The regeneration tank 230 has an agitating device 231 therein for storing the recovered circulating fluid and preventing separation or coagulation of the circulating fluid, and a first sensor 231 for measuring the liquid level of the recovered circulating fluid, (Not shown).

The first sensor 232 may be a sensor capable of measuring the liquid level height, and is preferably formed of, for example, an optical sensor or an infrared sensor.

On the other hand, the spinning liquid overflowed in the nozzle block 11 is recovered through the spinning liquid recovery path 250 provided below the nozzle block 11. [ The spinning solution recovery path 250 recovers the spinning solution to the regeneration tank 230 through the first transfer pipe 251.

The first transfer pipe 251 is provided with a pipe and a pump connected to the regeneration tank 230 and the spinning liquid is transferred from the spinning liquid recovery path 250 to the regeneration tank 230 by the power of the pump .

At this time, it is preferable that at least one of the regeneration tanks 230 is provided, and when there are two or more, the first sensor 232 and the valve 233 may be provided in plurality.

When the number of the regeneration tanks 230 is two or more, a plurality of valves 233 located above the regeneration tank 230 are also provided, so that a first transfer control device (not shown) It is possible to control the two or more valves 233 located at the upper part in accordance with the height of the liquid level of the first sensor 232 to control whether the spinning liquid is to be transferred to one of the plurality of regeneration tanks 230 do.

Meanwhile, the VOC recycling apparatus 300 is provided in the electrospinning apparatus 1. That is, a condenser (not shown) for condensing and liquefying VOC (Volatile Organic Compounds) generated during spinning of the spinning solution through the nozzles 12 to the units 10a and 10b of the electrospinning device 1 A distillation unit 320 for distilling and condensing the condensed VOC through the condenser 310 and a solvent storage unit 330 for storing the liquefied solvent through the distillation unit 320, A recycling apparatus 300 is provided.

Here, the condenser 310 is preferably a water-cooled, evaporative or air-cooled condenser, but is not limited thereto.

The vaporized VOC generated in each of the units 10a and 10b is introduced into the condenser 310 and the vaporized VOC generated in the condenser 310 is stored in the solvent storage unit 330 The pipes 311 and 331 are connected to each other.

That is, pipes 311 and 331 for interconnecting the units 10a and 10b and the condenser 310, the condenser 310, and the solvent storage unit 330 are connected to each other.

In an embodiment of the present invention, the VOC is condensed through the condenser 310, and the condensed and liquefied VOC is supplied to the solvent storage device 330. However, the condenser 310 and the solvent storage It is also possible that a distillation apparatus 320 is provided between the apparatuses 330 so as to separate and sort each solvent when more than one solvent is applied.

Here, the distillation apparatus 320 is connected to the condenser 310 to vaporize the VOC in the liquefied state by the high-temperature heat and to cool it again to supply the liquefied VOC to the solvent storage apparatus 330.

In this case, the VOC recycling apparatus 300 includes a condenser 310 for supplying air and cooling water to the vaporized VOC discharged through the units 10a and 10b and condensing and liquefying the same, A distillation apparatus 320 for converting the condensed VOC to heat to form a vaporized state and then cooling it to a liquefied state and a solvent storage apparatus 330 for storing the liquefied VOC through the distillation apparatus 320 .

Here, the distillation apparatus 320 is preferably a fractionation apparatus, but it is not limited thereto.

That is, the piping for interconnecting the units 10a and 10b and the condensing unit 310, the condensing unit 310 and the distillation unit 320, and the distillation unit 320 and the solvent storage unit 330 311, 321, and 331 are connected to each other.

Then, the content of the solvent in the spinning liquid overflowed and recovered in the recovery tank 230 is measured. The measurement can be performed by extracting a part of the spinning solution as a sample in the recovery tank 230 and analyzing the sample. Analysis of the spinning solution can be carried out by a known method.

Based on the measurement results, the required amount of the solvent is supplied to the regeneration tank 230 through the pipe 332 in the liquefied state, which is supplied to the solvent storage device 330. That is, the liquefied VOC is supplied to the regeneration tank 230 by a required amount according to the measurement result, and can be reused and recycled as a solvent.

The case 18 constituting each unit 10a and 10b of the electrospinning device 1 is preferably made of a conductor but the case 18 may be made of an insulator or the case 18 may be made of a conductive material, A body and an insulator may be used in combination, or may be made of various other materials.

It is also possible to eliminate the insulating member 19 when the upper portion of the case 18 is made of an insulator and the lower portion thereof is used in combination as a conductor. To this end, the case 18 is preferably formed as a case 18 by being coupled with a lower part formed of a conductor and an upper part formed of an insulator, but the present invention is not limited thereto.

As described above, the case 18 is formed of a conductor and an insulator, and the upper part of the case 18 is formed of an insulator so that the collector 18 is separately provided for mounting the collector 13 on the inner surface of the upper part of the case 18 It is possible to eliminate the insulating member 19, which can simplify the structure of the apparatus.

It is also possible to optimize the insulation between the collector 13 and the case 18 so that when 35 kV is applied between the nozzle block 11 and the collector 13 for electrospinning, It is possible to prevent the breakdown of the insulation that may occur between the electrode 18 and other members.

In addition, the leakage current can be stopped within a predetermined range, the current supplied from the voltage generators 14a and 14b can be monitored, and the abnormality of the electrospinning device 1 can be detected early, (1) can be continuously operated for a long time, and the production of nanofibers having required performance is stable and mass production of nanofibers is possible.

Here, the thickness a of the case 18 formed of an insulator is made to satisfy "a = 8 mm".

Therefore, when 40 kV is applied between the nozzle block 11 and the collector 13 to perform electrospinning, an insulation breakdown that may occur between the collector 13 and the case 18 and other members And the leakage current can be limited within a predetermined range.

The distance between the inner surface of the case 18 formed of an insulator and the outer surface of the collector 13 is smaller than the thickness a of the case 18 and the distance between the inner surface of the case 18 and the outer surface of the collector 13 The distance "b" is made to satisfy "a + b = 80 mm".

Therefore, when 40 kV is applied between the nozzle block 11 and the collector 13 to perform electrospinning, an insulation breakdown that may occur between the collector 13 and the case 18 and other members And the leakage current can be limited within a predetermined range.

A temperature regulating device 60 is provided in each tube 40 of the nozzle block 11 provided in each unit 10a and 10b of the electrospinning device 1 according to the present invention and the voltage generating devices 14a, 14b.

4, the tubular body 40 of the nozzle block 11, which is provided in each of the units 10a and 10b and to which the polymer solution is supplied by the plurality of nozzles 12 provided on the unit, The temperature control device 60 is provided.

Here, the flow of the spinning liquid in the nozzle block 11 is supplied to each tube 40 from the spinning liquid main tank 8 in which the spinning solution is stored, through the solution flow pipe.

The spinning solution supplied to each tube 40 is discharged and injected through a plurality of nozzles 12 and accumulated on the long sheet 15 in the form of nanofibers.

A plurality of nozzles 12 are mounted at predetermined intervals in the longitudinal direction on each of the tubes 40. The nozzles 12 and the tubes 40 are electrically connected to the tube 40 .

In order to control the temperature control of the spinning solution supplied to and introduced into the tubes 40, the temperature controller 60 is connected to the heating wires 41 and 42 or the pipe 43 provided at the periphery of the tube 40, .

In order to adjust the temperature of the plurality of tubes 40, a temperature controller 60 is provided.

5 to 6, a temperature regulating device 60 in the form of a heat line 41 is formed in a spiral shape on the periphery of the inner wall of the inner tube 40 of the nozzle block 11, It is preferable to adjust the temperature of the supplied and incoming spinning liquid.

In the embodiment of the present invention, the nozzle block 11 is spirally provided with a temperature adjusting device 60 in the shape of a heat ray 41 on the inner circumference of the tube 40. However, as shown in FIGS. 7 to 8, A plurality of temperature control devices 60 in the form of a heat line 42 may be radially provided on the inner circumference of the tube 40. As shown in Figures 9 to 10, It is also possible that the temperature regulating device 60 of the present invention is provided in the form of a "C"

Meanwhile, in the present invention, instead of maintaining the concentration constant, the high-concentration epoxy resin and the curing agent to be reused are used again after the overflow, and the viscosity of the epoxy resin and the curing agent is constantly controlled using the temperature controller 60, And it is easy to form nanofibers of the epoxy resin and the curing agent at a high temperature condition in order to control the high viscosity without using a diluent.

The viscosity refers to the ratio of the skew stress and the skewness rate of solute and solvent in the flowing liquid. In general, it is expressed in terms of the point dryness per cutting area, and the unit is dynscm-2gcm-1s-1 or poise (P). The viscosity decreases in inverse proportion to the temperature rise. If the viscosity of the solution is higher than the viscosity of the solvent, the flow of the liquid is distorted depending on the solute, and the flow rate of the liquid is lowered by the amount.

The viscosity of the solution is measured at various solution concentrations and extrapolated to a concentration of 0, and the relationship between the intrinsic viscosity (?) And the molecular weight M of the substance can be expressed as (?) = KMa. In this case, K, a is an integer depending on the type of solute or solvent and the temperature. Therefore, the viscosity value is affected by the temperature, and the degree of the change depends on the type of fluid. Therefore, when talking about viscosity, the values of temperature and viscosity should be specified.

When fabricating the nanofiber with the electrospinning device 1, the fiber diameter and radioactivity of the nanofiber produced, such as the type of polymer and solvent used, the concentration of the polymer solution, the temperature and humidity of the spinning room, And the like. That is, the physical properties of the polymer emitted from electrospinning are important. It has been considered that it is usually necessary to maintain the viscosity of the polymer at or below a predetermined viscosity at the time of electrospinning. This is because the higher viscosity means that the nano-sized fibers are not smoothly radiated through the nozzle, and the higher the viscosity, the more unsuitable for fiberization through electrospinning.

The present invention is characterized in that it includes a temperature control device 60 for maintaining and controlling the fiber viscosity suitable for electrospinning as described above.

The temperature regulating device 60 may be provided with a heating device capable of keeping the viscosity of the high viscosity solution reused through the overflow low and a cooling device capable of maintaining the viscosity of the solution having a relatively low viscosity at a high level .

In the temperature in the electrospinning region, the temperature of the region where the electrospinning occurs (hereinafter, referred to as the 'radiating region') changes the surface tension of the spinning solution by changing the viscosity of the spinning solution, . ≪ / RTI >

That is, when the temperature of the radiation region is relatively high, the nanofiber having a relatively small fiber diameter is produced when the viscosity of the solution is low, and the nanofiber having relatively large fiber diameter is produced when the viscosity of the solution is relatively high because the temperature is relatively low.

In particular, in the case of the polymer solution, the concentration of the solution re-supplied through the overflow tends to increase. By measuring the concentration of the solution in the intermediate tank 220 and adjusting the temperature using the temperature-viscosity graph corresponding to the concentration, It can be kept constant.

The concentration measuring device for measuring the concentration has a contact type and a non-contact type in direct contact with a solution, and a capillary type concentration measuring device and a disk (DISC) type concentration measuring device can be used as a contact type. A concentration measuring apparatus using a concentration measuring apparatus using infrared or the like can be used.

The heating device of the present invention may be an electric heater, a hot water circulating device, a hot air circulating device, or the like. In addition, devices capable of raising the temperature in the same range as the above devices can be borrowed.

As an example of the heating device, the electro-thermal heater may be used in the form of a hot wire, and coil-shaped hot wires 62a and 62b may be mounted inside the tube 43 of the nozzle block 110, (See Figs. 5 to 10).

It is also possible to have the configuration of the linear heat lines 62a and 62b and the U-shaped pipe 63.

The heating device includes a nozzle block 110 through which the polymer solution is radiated, a tank (main storage tank, intermediate tank or regeneration tank) and an overflow system 200 (in particular, a tank And a transfer pipe).

The cooling device of the present invention may be a cooling device including a chiller, and the means for maintaining a constant viscosity of the solution is generally applicable. The cooling device may be provided in at least one of the nozzle block 110, the tank, and the overflow system 200 in the same manner as the heating device, and is used to maintain a constant viscosity of the solution.

In addition, the temperature controller 60 of the present invention includes a sensor for measuring the concentration and a temperature control unit (not shown) for controlling the temperature accordingly.

The sensor is installed on the main storage tank 210, the intermediate tank 220, the regeneration tank 230, the nozzle block 110 or the overflow system 200 to measure the concentration of the flushing liquid in real time, The heating device and / or the cooling device is operated so that the viscosity is kept constant in the heating device 60.

The concentration of the solution re-supplied through the overflow system 200 of the present invention is 20 to 40%, which is a high concentration solution compared to 10 to 18% of the concentration of the spinning solution used in ordinary electrospinning.

Further, in order to make the viscosity of the solution to be supplied again according to the present invention constant, the temperature of the solution according to the concentration of the solution is controlled at 45 to 120 ° C, not at room temperature, more preferably 50 to 100 ° C Lt; / RTI >

On the other hand, the viscosity of the solution of the present invention is preferably 1,000 to 5,000 cps, more preferably 1,000 to 3,000 cps. When the viscosity is 1,000 cps or less, the quality of the nanofibers to be electrospun is poor, and when the viscosity is 3,000 cps or more, the solution is not easily discharged from the nozzle 42 during the electrospinning, and the production speed is slowed down.

In addition, since the viscosity of the solution is constant as the electrospinning progresses, the ease of spinning during electrospinning is excellent, and the concentration of the solution is increased, so that the productivity of the nanofibers integrated in the collector increases due to an increase in the amount of solids, .

In addition, the amount of the residual solvent of the nanofibers using electrospinning is lower than that of the conventional electrospinning, and thus it is possible to produce nanofibers of excellent quality.

The temperature controller 60 of the present invention measures the concentration of the intermediate tank 220 in an off-line manner and controls the viscosity of the solution through the temperature control of the nozzle block 110 or the main storage tank 210 Which can be manually operated, and which can automatically adjust the temperature of the solution according to the concentration measurement through an automatic control system on-line.

11, an auxiliary conveying device (not shown) for adjusting the conveying speed of the long sheet 15 to be drawn into and supplied into each unit 10a, 10b of the electrospinning device 1 according to the present invention 16 are provided.

The auxiliary conveying device 16 is provided for controlling the conveying speed of the long sheet 15 so as to facilitate detachment and conveyance of the long sheet 15 attached by the electrostatic attraction to the collector 13 provided in each unit 10a, An auxiliary belt 16a rotating synchronously and an auxiliary belt roller 16b supporting and rotating the auxiliary belt 16a.

The auxiliary belt 16a is rotated by the rotation of the auxiliary belt roller 16b by the above structure and the long sheet 15 is rotated by the rotation of the auxiliary belt 16a to the units 10a and 10b And one auxiliary belt roller 16b of the auxiliary belt rollers 16b is rotatably connected to the motor for this purpose.

In the embodiment of the present invention, five auxiliary belt rollers 16b are provided on the auxiliary belt 16a, and one of the auxiliary belt rollers 16b is rotated by the operation of the motor to rotate the auxiliary belt 16a At the same time, the remaining auxiliary belt rollers 16b are rotated. However, the auxiliary belt 16a is provided with two or more auxiliary belt rollers 16b, and one of the auxiliary belt rollers 16b is rotated by the operation of the motor , So that the auxiliary belt 16a and the remaining auxiliary belt roller 16b are rotated.

Meanwhile, in the embodiment of the present invention, the auxiliary transfer device 16 is composed of the auxiliary belt roller 16b and the auxiliary belt 16a which can be driven by a motor. However, as shown in FIG. 12, The roller 16b may be made of a roller having a low coefficient of friction.

At this time, the auxiliary belt roller 16b preferably comprises a roller including a bearing having a low friction coefficient.

The auxiliary conveying device 16 is composed of the auxiliary belt 16a and the auxiliary belt roller 16b having a low coefficient of friction but only the roller having a low friction coefficient excluding the auxiliary belt 16a So that the long sheet 15 is transported.

In addition, in the embodiment of the present invention, the auxiliary belt roller 16b is applied with a roller having a low coefficient of friction. However, any roller having a low coefficient of friction is not limited in its shape and configuration, It is also possible to apply rollers including bearings such as roller bearings, sliding bearings, sleeve bearings, fluid pressure journal bearings, hydrostatic journal bearings, pneumatic bearings, air bearing bearings, air static bearings and air bearings, It is also possible to apply a roller having a reduced coefficient of friction by including a material and an additive.

On the other hand, the thickness measuring device 70 is provided in the electrospinning device 1 according to the present invention. That is, as shown in Fig. 1, a thickness measuring device 70 is provided between each unit 10a, 10b of the electrospinning device 1, and the thickness measured by the thickness measuring device 70 And controls the feed velocity V and the nozzle block 11. [

When the thickness of the nanofibers discharged from the unit 10a located at the front end of the electrospinning device 1 is measured to be thinner than the deviation amount by the above-described structure, the feeding speed V of the next unit 10b The discharge amount of the nozzle block 11 is increased and the voltage intensity of the voltage generating devices 14a and 14b is adjusted to increase the discharge amount of the nanofibers per unit area to increase the thickness.

When the thickness of the nanofibers discharged from the unit 10a located at the front end of the electrospinning device 1 is measured to be thicker than the amount of deviation, the feeding speed V of the next unit 10b is increased, It is possible to make the thickness thinner by reducing the discharge amount of the voltage generating device 11 and by controlling the intensity of the voltage of the voltage generating devices 14a and 14b to reduce the discharge amount of the nanofibers per unit area to reduce the amount of lamination, A filter having a thickness can be produced.

Here, the thickness measuring device 9 is disposed so as to face upward and downward with the elongated sheet 15 inserted and supplied therebetween. The thickness measuring device 9 measures the distance to the top or bottom of the elongate sheet 15 by an ultrasonic measuring method, And a thickness measuring unit including a pair of ultrasonic longitudinal wave measuring systems for measuring the ultrasonic longitudinal wave.

Thus, the thickness of the long sheet 15 can be calculated on the basis of the distance measured by the pair of ultrasonic measuring devices. That is, the ultrasonic longitudinal wave and the transverse wave are projected together with the filter-laminated long sheet 15 to measure the propagation time of the longitudinal wave and the transverse wave at the time when each ultrasonic signal of the longitudinal wave and the transverse wave reciprocates on the longitudinal sheet 15 A predetermined equation using the propagation time of longitudinal waves and transverse waves and the propagation velocity of longitudinal waves and transverse waves at the reference temperature of the elongate sheet 15 in which the filters are stacked and the temperature constants of longitudinal waves and transverse wave propagation velocities, Is a thickness measuring device using an ultrasonic longitudinal wave and a transverse wave.

In other words, the thickness measuring device 70 measures the propagation time of the longitudinal wave and the transverse wave, and the propagation time of the longitudinal wave and the transverse wave at the reference temperature of the elongate sheet 15, The thickness of the elongate sheet 15 in which the nanofiber nonwoven fabric is laminated is calculated from a predetermined equation using a propagation velocity and a temperature constant of the longitudinal wave and the transverse wave propagation velocity to determine the propagation velocity It is possible to measure the thickness precisely by self-compensating for the error due to the change, and it is possible to measure the thickness accurately even if there is any type of temperature distribution inside the filter.

The thickness of the filter of the elongate sheet 15 to which the spinning liquid is sprayed and laminated to the electrospinning device 1 according to the present invention is measured to determine the conveying speed of the elongate sheet 15 and the conveying speed of the nozzle block 11 The elongate sheet conveying speed regulating device 30 for controlling the conveying speed of the elongate sheet 15 is further provided on the electrospinning device 1. The thickness measuring device 70 controls the thickness of the elongated sheet 15,

The elongated sheet conveying speed regulator 30 includes a buffer zone 31 formed between each unit 10a and 10b of the electrospinning device 1 and a buffer zone 31 provided on the buffer zone 31, A pair of support rollers 33 and 33 'for supporting the support rollers 15 and an adjustment roller 35 provided between the pair of support rollers 33 and 33'.

At this time, the support rollers 33 and 33 'are provided in the longitudinal direction of the long sheets 15a and 15b when the long sheets 15 are laminated by the spinning solution injected by the nozzles 12 in the units 10a and 10b, 15 and is provided at a line and a rear end of a buffer zone 31 formed between the units 10a, 10b, respectively.

The adjustment roller 35 is provided between the pair of support rollers 33 and 33 'so that the long sheet 15 is wound and moved up and down by the adjustment roller 35, The feeding speed and the moving time of the long sheets 15a and 15b for each unit 10a and 10b are adjusted.

To this end, a sensing sensor (not shown) for sensing the feeding speed of the long sheets 15a, 15b in each of the units 10a, 10b is provided. In each unit 10a, 10b sensed by the sensing sensor, And a main controller 7 for controlling the movement of the adjusting roller 35 in accordance with the feeding speed of the long sheets 15a and 15b.

In one embodiment of the present invention, the conveying speed of the long sheets 15a and 15b is sensed in each of the units 10a and 10b and the control unit controls the conveying speed of the adjusting rollers 15a and 15b according to the conveying speed of the long sheets 15a and 15b. The auxiliary belt 16a provided on the outer side of the collector 13 or the auxiliary belt 16a for driving the auxiliary belt 16a for transferring the long sheets 15a and 15b, The control unit may detect the driving speed of the roller 16b or the motor (not shown), and thereby control the movement of the adjusting roller 35. [

With the above structure, the detection sensor can detect the length of the long sheet (15a) in the unit (10b) in which the conveying speed of the long sheet (15a) in the unit (10a) 15b, it is possible to prevent the elongated sheet 15a fed in the unit 10a located at the leading end from sagging, as shown in Figs. 13 to 14, The unit 10b positioned at the rear end in the unit 10a positioned at the front end while the regulating roller 35 wound around the long sheet 15 is moved downward and provided between the supporting rollers 33 and 33 ' The elongated sheet 15a which is conveyed to the outside of the unit 10a located at the front end among the elongated sheets 15 to be conveyed to the buffering section 31 is conveyed to the buffer section 31 located between the units 10a and 10b, The conveying speed of the long sheet 15a in the unit 10a located at While the unit (10b) within the elongated sheet correction controlled to be equal to the feed rate of (15b) positioned to prevent the deflection and wrinkling of the elongated sheet (15a).

On the other hand, if the conveyance speed of the long sheet 15a in the unit 10a located at the front end of each unit 10a, 10b is smaller than the conveyance speed of the long sheet 15b in the unit 10b positioned at the rear end, 15 to 16, in order to prevent the long sheet 15b conveyed in the unit 10b located at the rear end from tearing, the pair of support rollers 33 The unit 10b positioned at the front end of the adjustment roller 35 and the unit 10b positioned at the rear end of the unit 10b are moved in the upward direction, The elongated sheet 15a wound on the regulating roller 35 is guided to the buffering zone 31 which is conveyed outside the unit 10a located at the front end of the sheet 15 and located between the units 10a and 10b To the unit 10b located at the rear end, The feed rate of the root (15a) unit (10b) within the elongated sheet (15b) which is located in the transfer speed and the rear end of the year, while the correction control such that the same prevents the dead of the elongated sheet (15b).

By adjusting the feeding speed of the long sheet 15b to be fed into the unit 10b located at the rear end of each of the units 10a and 10b by the above described structure, It is possible to obtain the effect that the conveying speed of the long sheet 15b in the first unit 10b becomes equal to the conveying speed of the long sheet 15a in the unit 10a located at the leading end thereof.

On the other hand, the electrospinning device 1 according to the present invention is provided with the air permeability measuring device 80. That is, an air flow meter (not shown) for measuring the air permeability of the filter manufactured through the electrospinning device 1 at the rear of the unit 10d located at the rearmost end of each unit 10a, 10b of the electrospinning device 1, (80).

As described above, the conveying speed of the long sheet 15 and the nozzle block 11 are controlled based on the measured air permeability of the filter through the air permeability measuring device 80.

When the air permeability of the nanofiber nonwoven fabric discharged through each of the units 10a and 10b of the electrospinning device 1 is measured largely, the feeding speed V of the unit 10b positioned at the rear end portion is delayed, The discharge amount of the nozzle block 11 is increased and the intensity of the voltage of the voltage generating devices 14a and 14b is regulated to increase the discharge amount of the nanofibers per unit area to thereby reduce the air permeability.

When the air permeability of the filter discharged through the units 10a and 10b of the electrospinning device 1 is measured to be small, the feeding speed V of the unit 10b positioned at the rear end is increased, The amount of the nanofibers per unit area is reduced to reduce the amount of lamination by decreasing the amount of discharge of the nanofibers 11 and adjusting the intensity of the voltage of the voltage generators 14a and 14b to thereby increase the air permeability.

As described above, after the air permeability of the filter is measured, it is possible to manufacture a filter having a uniform air permeability by controlling the feeding speed of each unit 10a, 10b and the nozzle block 11 according to the air permeability.

Here, when the air permeability deviation P of the filter is less than the predetermined value, the feed speed V is not changed from the initial value, and when the deviation amount P is equal to or larger than the predetermined value, It is possible to simplify the control of the conveyance speed V by the conveyance speed (V) control device.

It is also possible to control the discharge amount and the voltage of the nozzle block 11 in addition to the control of the feed speed V so that when the air flow deviation amount P is less than a predetermined value, When the amount of deviation P is equal to or larger than the predetermined value, the discharge amount of the nozzle block 11 and the voltage intensity are controlled to be changed from the initial value so that the discharge amount of the nozzle block 11 and the voltage It is possible to simplify the control of the intensity of the light.

The main control device 7 includes a nozzle block 11, voltage generators 14a and 14b, a thickness measuring device 70, The elongated sheet conveying speed regulating device 30 and the air permeability measuring device 80 are controlled.

The laminating apparatus 90 for laminating the filters electrified through the units 10a and 10b of the electrospinning apparatus 1 is provided with a unit 10b located at the rear end of each of the units 10a and 10b, And performs a post-process of the filter electrospun through the electrospinning device 1 by the laminating device 90. [

Hereinafter, an electrospinning apparatus for manufacturing a filter will be described with reference to Fig.

1 is a side view schematically showing an electrospinning device for manufacturing a filter.

As shown in the drawing, an electrospinning apparatus 1 according to the present invention is composed of a bottom-up electrospinning apparatus, in which at least one unit 10a or 10b is sequentially arranged at a predetermined interval, and each unit 10a , 10b) to prepare a filter by electrospinning a spinning liquid or other material solution of the same material individually or by electrospinning a spinning solution of different material.

In one embodiment of the present invention, the electrospinning device 1 is a bottom-up electrospinning device, but it may also be a top-down electrospinning device (not shown).

In addition, although two units 10a and 10b of the electrospinning apparatus 1 are provided in the embodiment of the present invention, the number of the units 10a and 10b is preferably two or more, But not limited thereto.

Each of the units 10a and 10b of the electrospinning device 1 is provided with a solution main tank 8 in which a spinning liquid is filled and a spinning solution filled in each of the solution main tanks 8 A nozzle block 11 in which a plurality of nozzles 12 in the form of pins are arranged and a nozzle 12 for spraying a spraying liquid filled in each of the solution main tanks 8, And a voltage generator 14a, 14b for generating a voltage in the collector 13, the collector 13 being spaced apart from the nozzle 12 by a predetermined distance in order to accumulate the spinning solution injected from the nozzle 13.

According to the above-described structure, the electrospinning device 1 according to the present invention is characterized in that the spinning liquid to be filled in each of the solution main tanks 8 is continuously and constantly supplied to the nozzle block 11 through the metering pump, The spinning solution supplied to the collector 11 is injected and focused on the collector 13 having a high voltage through the plurality of nozzles 12 and nanofibers are laminated on the collector 13 to be made into a filter .

To this end, the unit of the electrospinning device 1 is composed of a spinning solution unit 10a, and in the nozzle block 11 in the spinning solution unit 10a located at the tip end, an epoxy resin; Curing agent; And a polymer solution selected from the group consisting of a hydrophilic polymer, a hydrophobic polymer and a heat-resistant polymer is electrospun is provided on the electrospinning device 1, Spray the mixed solution.

The nozzle block 11 installed in each unit 10a is connected to the solution main tank 8 filled with the spinning solution.

In an embodiment of the present invention, each nozzle block 11 installed in each unit 10a is individually connected to a corresponding number of solution main tanks 8 to supply a spinning solution. However, Each unit 10a may be connected to one solution main tank 8 to be supplied with the spinning solution.

Here, the front of the unit 10a positioned at the foremost end of each unit 10a of the electrospinning device 1 is provided with a base material 15a into which the nanofibers are injected by the electrospinning of the spinning liquid, And a winding roller 5 for winding the substrate 15 on which nanofibers are laminated is provided.

The substrate 15 to be fed and fed through the feed roller 3 is fed into each unit 10a of the electrospinning device 1 to the take-up roller 5 side, And an auxiliary conveying device 16 for controlling the speed.

The main control unit 7 is provided in the electrospinning device 1 and includes a nozzle block 11 installed in each unit 10a, an auxiliary conveying unit 16, and a voltage generator 14a and controls the thickness measuring device 70, the substrate conveyance speed adjusting device 30 and the air permeability measuring device 80, which will be described later, and controls the same.

On the other hand, a laminating apparatus 90 for laminating the nanofibers electrospun on the substrate 15 through the units 10a and 10b of the electrospinning apparatus 1 is provided at the end of each of the units 10a and 10b And performs a post-process of the filter that is provided behind the unit 10b located at the stage and is electrospun through the electrospinning device 1 by the laminating device 90. [

As described above, it is preferable that the base material 15 in which the spinning solution is electrified while passing through the units 10a and 10b of the electrospinning device 1 and the nanofibers are laminated is a binary material base.

At this time, the spinning solution radiated through each unit 10a of the electrospinning device 1 is the same as described above.

The spinning solution supplied through the nozzles 12 in each of the units 10a and 10b is a solution in which a polymer as a synthetic resin material capable of electrospinning is dissolved in an appropriate solvent and the type of solvent is a solution capable of dissolving the polymer And is the same as that described above.

Here, an overflow device 200 is provided in the electrospinning device 1. That is, each of the solution main tanks 8, the second transfer piping 216, the second transfer control device 218, the intermediate tank 220, and the regeneration tank 218 are connected to the respective units 10a, 10b of the electrospinning apparatus 1, And an overflow device 200 having a configuration including a tank 230 are provided.

Although the overflow device 200 is provided in each unit 10a and 10b of the electrospinning device 1 according to the embodiment of the present invention, any one of the units 10a and 10b, It is also possible that the overflow device 200 is provided in the overflow device 200 and the remaining unit 10b is integrally connected to the overflow device 200.

According to the structure as described above, the solution main tank 8 provided in each of the units 10a and 10b stores the polymer solution for the raw material of nanofibers. In the solution main tank 8, a separate stirring device 211 for preventing the separation and coagulation of the polymer spinning solution is provided therein.

The second transfer pipe 216 is configured to include a pipe (not shown) connected to the solution main tank 8 or the regeneration tank 230 and valves 212, 213 and 214, The polymer spinning solution is transferred from the solution main tank 8 or the regeneration tank 230 in which the usage solution is filled to the intermediate tank 220.

The second conveyance control unit 218 controls the conveyance operation of the second conveyance pipe 216 by controlling the valves 212 and 213 of the second conveyance pipe 216.

The valve 212 controls the transfer of the polymer solution to the intermediate tank 220 from the solution main tank 8 filled with the polymer solution and the valve 213 is connected to the intermediate tank 220, The valve 214 controls the amount of the polymer solution to be introduced into the intermediate tank 220 from the solution main tank 8 and the regeneration tank 230.

As described above, the liquid surface height of the polymer spinning solution measured through the second sensor 222 provided in the intermediate tank 230 to be described later is controlled by the control of the valves 212, 213, and 214.

The intermediate tank 220 separately stores the polymer solution used in the solution tank 8 or the recovery tank 230 in which the polymer solution is filled and the solution 10a, And a second sensor 222 for supplying the polymer solution to the nozzle block 12 and measuring the height of the liquid level of the supplied polymer solution.

Here, the second sensor 222 is preferably a sensor capable of measuring the liquid level of the polymer solution, such as an optical sensor or an infrared sensor, but is not limited thereto.

A supply pipe 240 and a supply control valve 242 for supplying the polymer solution with the nozzle block 11 are provided in the lower part of the intermediate tank 220. The supply control valve 242 supplies And controls the supply operation of the polymer spinning solution through the pipe 240.

The regeneration tank 230 is provided with a stirring device 231 for storing the polymer spinning solution recovered by the overflow separately and for preventing the separation and coagulation of the polymer spinning solution.

Here, the first sensor 232 is preferably a sensor capable of measuring the liquid level of the polymer solution, such as an optical sensor or an infrared sensor, but is not limited thereto.

Meanwhile, the polymer solution for overflowing in the nozzle block 11 is separately recovered through the solution recovery path 250 provided in the lower part of the nozzle block 11, and the solution recovery path 250 is divided into the first The polymer spinning solution in the regeneration tank 230 is recovered through the transfer pipe 251.

The first transfer pipe 251 includes a pipe (not shown) connected to the regeneration tank 230 and a pump (not shown), and the polymer spinning solution is circulated through the solution return path (250) to the regeneration tank (230).

At this time, it is preferable that the regeneration tank 230 is provided at least more than one, and when the regeneration tank 230 is provided in two or more, the first sensor 232 and the valve 233 are provided in a plurality of .

When the number of the regeneration tanks 230 is two, the number of the valves 233 located above the regeneration tank 230 corresponds to the number of the regeneration tanks 230. Accordingly, the first transfer control device (not shown) Controls the two or more valves 233 positioned at the upper part according to the height of the liquid level of the first sensor 232 provided in the regeneration tank 230 so that the polymer solution is supplied to the regeneration tank 230 of the plurality of regeneration tanks 230 ) To be transported individually.

The electrospinning device 1 includes an auxiliary conveying device 16, a moving speed regulating device 30, a temperature regulating device 60, a thickness measuring device 70, an air permeability measuring device 80, a VOC recycling device 300, and the like. The auxiliary transfer device, the moving speed adjusting device, the temperature adjusting device, the thickness measuring device, the air permeability measuring device, and the VOC recycling device are the same as described above. The case 18 constituting each unit of the electrospinning apparatus 1 is also the same as described above.

Hereinafter, the two-component base material and the epoxy resin of the present invention using the electrospinning device; Curing agent; And a nanofiber including one kind of polymer selected from the group consisting of a hydrophilic polymer, a hydrophobic polymer, and a heat-resistant polymer.

In the present invention, one unit 10a is used in the electrospinning apparatus, and as the polymer, an epoxy resin; Curing agent; And a mixture of a polymer selected from the group consisting of a hydrophilic polymer, a hydrophobic polymer, and a heat-resistant polymer is used.

 First, an epoxy resin; Curing agent; And a polymer solution selected from the group consisting of a hydrophilic polymer, a hydrophobic polymer and a heat-resistant polymer in a solvent is supplied to a spinning liquid main tank 8 connected to the first unit 10a of the electrospinning apparatus, The mixed solution supplied to the use liquid main tank 8 is continuously supplied in a constant amount into the plurality of nozzles 12 of the nozzle block 11 to which a high voltage is applied through a metering pump (not shown). The mixed solution supplied from each of the nozzles 12 is electrospun and converged on the collector 13 having a high voltage through the nozzle 12 to form an epoxy resin-curing agent-polymer nanofiber layer. In each unit 10a of the electrospinning device 1, the epoxy resin-curing agent-polymer nanofibers are supplied to the feed roller 3, which is operated by driving a motor (not shown) Is transferred from the first unit 10a to the second unit 10b by rotation of the auxiliary transfer device 16 driven by the second transfer unit 16 and the above process is repeated while the epoxy resin-curing agent-polymer nano- The fibers are continuously electrospun and laminated.

In the course of electrospinning the solution onto the collector 13 to form a laminate, the epoxy resin curing agent-polymer nanofibers are successively formed in the first unit 10a by varying the spinning conditions for each unit 10a of the electrospinning apparatus And laminated.

 Two or more epoxy resins and curing agent nanofibers having different fiber diameters with different voltages for each unit are formed by stacking two or more units of the electrospinning device 1 on the collector 13 It would also be possible to manufacture a filter.

In the first unit 10a as described above, a mixed solution containing an epoxy resin and a curing agent is electrospun on the collector 13 to form a nanofiber layer of epoxy resin-curing agent-polymer nanofiber, It is possible to produce the filter of the present invention.

At this time, the epoxy resin contained in the adhesive layer and the curing agent react with each other through thermal fusion to cure, thereby making it possible to produce a membrane which does not readily detach.

Hereinafter, the present invention will be described concretely with reference to Examples. However, the following Examples and Experimental Examples are merely illustrative of one form of the present invention, and the scope of the present invention is not limited by the following Examples and Experimental Examples .

Example 1

A spinning solution prepared by dissolving an epoxy resin, an amine curing agent and polyvinylidene fluoride in a DMAc (N, N-dimethylaceticamide) solvent in an amount of 15% by weight was introduced into the spinning liquid main tank of the first unit.

 In the first unit of the electrospinning device, an epoxy resin-amine curing agent-polyvinylidene fluoride spinning solution was electrospun on the binary material under the conditions of a distance of 40 cm between the electrode and the collector, an applied voltage of 20 kV and a temperature of 70 ° C Thereby forming a first nanofiber layer having a basis weight of 3 g / m < 2 >.

At this time, the first nanofiber layer was electrospun with a first nanofiber layer having a basis weight of 3 g / m < 2 > through a nozzle block including an on-off system designed to separate a nozzle block in the longitudinal direction of the substrate. The first nanofiber layer has a vertical width of 180 cm with respect to the longitudinal direction of the base material. The basis weight of the first nanofiber is 2 g / m 2 alternately and the basis weight of the first nanofiber layer is 7 g / m 2 repeatedly A first nanofiber layer including a structure was formed and a filter having a different basis weight of nanofibers in the longitudinal direction of the substrate was prepared.

Comparative Example 1

A spinning solution prepared by dissolving polyethersulfone in dimethylacetamide (N, N-Dimethylacetamide, DMAc) was added to the spinning liquid main tank of the first unit. In the first unit of the electrospinning device, the polyethersulfone spinning solution was electrospun on the polyethylene terephthalate substrate under the conditions of the distance between the electrode and the collector of 40 cm, the applied voltage of 20 kV and the temperature of 22 ° C, Ether sulfone nanofibers were formed.

Experimental Example

The physical properties of the filters prepared in Example 1 and Comparative Example 1 were measured by the following methods, and the results are shown in Table 1 below.

(1) Measurement of water pressure: Water pressure was measured by the method of ISO 0811 standard.

(2) Measurement of air permeability: Air permeability was measured by the method of JIS L 1096 standard.

Example 1 Comparative Example 1 Water pressure (mmH2O) 4,500 3,500 Air permeability (cm 3 / sec / cm 2) 0.5 0.6

As can be seen from the above Table 1, the filter manufactured through the embodiment of the present invention has improved water pressure and air permeability of at least 50% or more as compared with the comparative example.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. Anyone with it will know easily.

1, 100: electrospinning device, 3: feed roller,
5: take-up roller, 7: main control device,
8: Spray solution Main tank,
10a, 10b, 10c, 10d, 110, 110 ': unit,
11, 11a, 11b, 111: nozzle block, 12, 111a: nozzle,
112, 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i:
13: collector, 14, 14a, 14b, 14c, 14d, 114: voltage generator,
15, 15a, 15b, 115: long sheet, 16: auxiliary conveying device,
16a: auxiliary belt, 16b: auxiliary belt roller,
18: case, 19: insulating member,
30: Long sheet conveying speed adjusting device, 31: Buffer section,
33, 33 ': support roller, 35: regulating roller,
40: tube body, 41, 42: heat wire,
43: pipe, 60: thermostat,
70: thickness measuring device, 80: air permeability measuring device,
90: laminating device, 200: overflow device,
211, 231: stirring device, 212, 213, 214, 233: valve,
216: second transfer pipe, 218: second transfer control device,
220: intermediate tank, 222: second sensor,
230: regeneration tank, 232: first sensor,
240: supply piping, 242: supply control valve,
250: circulating fluid recovery path, 251: first transfer pipe,
300: VOC recycling apparatus, 310: condensing apparatus,
311, 321, 331, 332: piping, 320: distillation device,
330: solvent storage device, 404: air supply nozzle,
405: nozzle plate, 407: first spinning solution storage plate,
408: second spinning liquid storage plate, 410: overflow liquid temporary storage plate,
411: air storage plate, 412: overflow outlet,
413: Air inlet, 414: Air supply nozzle support plate,
415: nozzle for overflow removal,
416: nozzle support plate for removing overflow, 500: multi-tubular nozzle,
501: inner tube, 502: outer tube,
503: tip end, 115a, 115b, 115c: nanofiber,
116a: conveying belt, 116b: conveying roller,
120: spinning liquid main tank, 120a: first spinning liquid main tank,
120b: second spinning solution main tank, 121: solution supply pipe,
121a: first supply pipe, 121b: second supply pipe,
122: supply valve, 125: nozzle supply pipe,
126: Nozzle valve.

Claims (9)

materials; And
An epoxy resin on a substrate; Curing agent; And a nanofiber layer formed by electrospinning a mixed solution in which a polymer selected from the group consisting of a hydrophilic polymer, a hydrophobic polymer, and a heat-resistant polymer is mixed,
Wherein the nanofiber layer has a different basis weight on the same plane in the longitudinal direction of the substrate.
The method according to claim 1,
Wherein the curing agent is one selected from the group consisting of an amine curing agent, an acid anhydride curing agent and an imidazole curing agent.
The method according to claim 1,
Wherein the mixed solution is electrospun through a temperature controller at a temperature of 50 to 100 ° C.
The method of claim 3,
Wherein the viscosity of the mixed solution is adjusted to 1,000 to 3,000 cps through the temperature controller.
The method according to claim 1,
The hydrophilic polymer is one selected from the group consisting of polyvinyl alcohol, polyethersulfone, polyacrylonitrile, polyamide and hydrophilic polyurethane,
The hydrophobic polymer is a polyimide or a meta-aramid,
Wherein the heat-resistant polymer is one selected from the group consisting of polyvinylidene fluoride, hydrophobic polyester and hydrophobic polyurethane.
An electrospinning device for manufacturing a filter,
A nozzle block installed in the unit, wherein a plurality of nozzle tubes having a plurality of nozzles in the form of pins are arranged in a longitudinal direction of the base plate;
A spinning liquid main tank filled with a polymer spinning solution and connected to a nozzle body of the nozzle block to supply a polymer spinning solution;
A collector spaced apart from the nozzles in order to accumulate the polymer spinning solution injected from the nozzles of the nozzle tubes;
A voltage generator for generating a voltage in the collector; And
An auxiliary transfer device for transferring the substrate;
Wherein each of the nozzle tubes is connected to the spinning liquid main tank through a solution supply pipe and the solution supply pipe is provided with a supply amount adjusting means so that the supply amount of the polymer spinning solution supplied from the spinning solution main tank to the nozzle tube is controlled and adjusted. And the radiation amount of the polymer spinning solution is adjusted and controlled by supplying the spinning solution to the nozzles in the nozzle tube and controlling the spinning amount of the polymer spinning solution, Wherein a filter having different basis weights is laminated on the same plane in the longitudinal direction of the substrate when electrospinning the polymer spinning solution.
The method according to claim 6,
Wherein the supply amount adjusting means provided in the solution supply pipe comprises a supply valve that is openably and closably controlled so that only a specific nozzle body of each nozzle body connected to the spinning liquid main tank by the opening and closing of the supply valve And the polymer spinning solution is selectively supplied.
The method according to claim 6,
The spinning amount adjusting means provided in the nozzle supply pipe is composed of a nozzle valve which is controlled to be openable and closable so that only a specific nozzle among the nozzles connected to the nozzle supply pipe to the solution supply pipe by the nozzle valve opens the solution And the filter is electrified and electrospun.
The method according to claim 6,
Wherein the supply amount adjusting means of the solution supply pipe is composed of a supply valve controlled to be openable and closable, wherein only one of the nozzle tubes, which is connected to the spinning liquid main tank by the opening and closing of the supply valve, And a control unit for controlling the amount of radiation of the nozzle supply pipe to selectively and selectively supply a specific nozzle among the nozzles connected to the nozzle supply pipe to the solution supply pipe by the opening and closing of the nozzle valve, Wherein the polymeric spinning solution is selectively supplied and electrospun, and the opening and closing of the supply valve and the nozzle valve are individually or simultaneously controlled.

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