KR101771919B1

KR101771919B1 - Nanofiber filter including polyethylene terephthalate substrate and epoxy resin curing agent

Info

Publication number: KR101771919B1
Application number: KR1020150165616A
Authority: KR
Inventors: 박종철
Original assignee: (주)에프티이앤이
Priority date: 2015-11-25
Filing date: 2015-11-25
Publication date: 2017-08-28
Also published as: KR20170060883A

Abstract

The present invention relates to a nanofiber filter including nanofibers, and more particularly, to a nanofiber filter including an epoxy resin nanofiber and a hardener nanofiber.

Description

A nanofiber filter including a polyethylene terephthalate substrate and an epoxy resin curing agent comprising a polyethylene terephthalate base and an epoxy resin-

The present invention relates to a nanofiber filter including nanofibers, and more particularly, to a nanofiber filter including a polyethylene terephthalate base and an epoxy resin-curing agent.

Generally, a gas turbine used in a thermal power plant sucks and compresses purified air from the outside, injects compressed air into the combustor together with the fuel, mixes the mixed air and fuel, It is a type of rotary internal combustion engine that obtains the combustion gas and then injects it into the vane of the turbine to obtain the rotational force. Because these gas turbines are made up of very precise parts, they are periodically serviced and use air filters for pretreatment to purify the air in the air entering the compressor.

The air filter is capable of supplying purified air by preventing foreign substances such as dust and dust contained in the air from permeating into the filter filter material when the combustion air sucked into the gas turbine is taken in the air. However, particles having a large particle size accumulate on the surface of the filter media, forming not only a filter cake on the surface of the filter media, but also accumulating fine particles in the filter media, thereby blocking the pores of the filter media. As a result, when the particles are accumulated on the surface of the filter media, there is a problem of increasing the pressure loss of the filter and decreasing the service life.

On the other hand, a porous membrane of polytetrafluoroethylene (hereinafter referred to as " PTFE ") has been proposed as an air filter medium (see, for example, Japanese Patent Application Laid-Open No. 5-202217). In the case of using a PTFE porous film, a thermoplastic material such as a spunbonded nonwoven fabric using long fibers of core / sheath structure is applied to both surfaces of the PTFE porous film in order to prevent scratches and pinholes from occurring because the film itself is thin It has also been proposed to laminate and protect it. (See Japanese Unexamined Patent Publication No. 6-218899)

However, in the conventional air filter, particles having a large particle size accumulate on the surface of the filter material, so that the filter cake is formed on the surface of the filter material, and fine particles are accumulated in the filter material, thereby blocking the pores of the filter material. As a result, when the particles are accumulated on the surface of the filter media, there is a problem of increasing the pressure loss of the filter and decreasing the service life.

In order to solve the above-mentioned problems, various methods of manufacturing nano-sized fibers and applying them to filters have been developed and used. When nanofibers are applied to a filter, the specific surface area is larger than that of a conventional filter material having a large diameter, and the flexibility of the surface functional group is also good. In addition, by having the processing size of nano gold, it is possible to efficiently filter fine dust particles.

However, in the conventional nanofiber filter, a laminating process for laminating the substrate and the nanofiber web is performed as a post-process. However, due to differences in materials and components of the substrate and the polymer solution, the polymer solution is electrospun There is a problem in that the nanofiber webs to be laminated are desorbed.

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 of manufacturing a semiconductor device, which comprises a step of dividing a radiation section into at least two or more and continuously spraying an epoxy resin and a curing agent in a nozzle block, A fiber filter is manufactured and the number of the divided radiation spaces or the distance of the radiation section can be varied to manufacture a nanofiber filter suited to a desired product characteristic and a manufacturing process can be simplified, It is an object of the present invention to provide a fiber filter.

The present invention relates to a polyethylene terephthalate substrate; A first nanofiber layer formed by electrospinning an epoxy resin solution on the polyethylene terephthalate substrate; A second nanofiber layer laminated by electrospinning a curing agent solution on the first nanofiber layer; And a third nanofiber layer formed by electrospinning an epoxy resin solution on the second nanofiber layer.

The present invention also provides a nanofiber filter characterized in that the epoxy resin solution and the curing agent solution are electrospun through a temperature controller at a temperature of 50 to 100 ° C.

Here, the viscosity of the epoxy resin solution and the curing agent solution is controlled to 1,000 to 3,000 cps through the temperature controller.

In addition, the present invention provides a nanofiber filter wherein the first nanofiber layer, the second nanofiber layer, and the third nanofiber layer are different in basis weight along the longitudinal direction or the transverse direction.

The method of manufacturing a nanofiber filter according to the present invention comprises a nanofiber filter which is divided into at least two radiation sections and is continuously electrospun epoxy resin and a curing agent through each radiation section to form a laminate of two or more layers, The manufacturing process of the nanofiber filter can be simplified and simplified, thereby reducing the manufacturing cost and manufacturing time.

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 diagram showing a nanofiber filter comprising a polyethylene terephthalate base material, an epoxy resin nanofiber, and a curing agent nanofiber according to 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 first nanofiber layer formed by electrospinning an epoxy resin on a polyethylene terephthalate substrate; A second nanofiber layer laminated by electrospinning a curing agent solution on the first nanofiber layer; And a third nanofiber layer formed by electrospinning an epoxy resin on the second nanofiber layer.

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 curing agent 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; Straight or branched alkenyl groups such as vinyl, allyl, and crotyl; 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, 1-butanesulfonic acid, Aliphatic sulfonic acids such as 1-hexanesulfonic acid, 1-octanesulfonic acid, 1-decanesulfonic acid and 1-dodecane sulfonic acid (for example, an aliphatic sulfonic acid having 1 to 16 carbon atoms); Benzene sulfonic acid, 3- (linear or branched octadecyl) benzene sulfonic acid, 4- (straight or branched octyl) benzene sulfonic 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.

Meanwhile, the nanofiber 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 drawing, an electrospinning apparatus 1 according to the present invention is composed of a bottom-up electrospinning apparatus 1, in which at least one unit 10a, 10b, 10c is sequentially arranged at a predetermined interval , Each of the units 10a, 10b, and 10c emits the same spinning liquid individually or electrospun fluids different in material to produce a nanofiber filter.

To this end, each unit 10a, 10b, 10c is filled with a spinning liquid main tank 8 in which an epoxy resin and a hardening agent are filled, an epoxy resin filled in the spinning liquid main tank 8 and a hardening agent A nozzle block 11 for discharging the epoxy resin filled in the spinning liquid main tank 8 and a curing agent, the nozzle block 11 having a plurality of nozzles 12 arranged in a pin shape; A collector 13 spaced apart from the nozzle 12 by a predetermined distance and a voltage generator 14a and 14b for generating a voltage in the collector 13 for integrating the epoxy resin and the curing agent injected from the nozzle 12 .

The electrospinning device 1 according to the present invention has a structure in which the epoxy resin filled in the spinning liquid main tank 8 and the curing agent are supplied to the plurality of nozzles 12 And the supplied epoxy resin and light shade are radiated and focused on the collector 13 with a high voltage applied thereto through the nozzle 12 to be transferred onto the long sheet 15 moved on the collector 13 And the formed nanofiber is made of a nanofiber filter.

Herein, in front of the unit 10a positioned at the tip of each unit 10a, 10b, 10c of the electrospinning device 1, nanofibers are laminated and formed by injection of epoxy resin into the unit 10a A feeding roller 3 for feeding the elongated sheet 15 is provided and a long sheet 15 in which nanofibers are laminated is provided at the rear of the unit 10c located at the rear end of each unit 10a, 10b, Up roller (5) for winding the sheet.

On the other hand, the elongated sheet 15 on which the epoxy resin and the curing agent are laminated while passing through each of the units 10a, 10b, and 10c is preferably made of polyethylene terephthalate.

At this time, the material of the epoxy resin and the curing agent which are radiated through each unit 10a, 10b, 10c of the electrospinning device 1 is not limited, but in the present invention, an epoxy resin is used for the units 10a, 10c And a curing agent is used for the unit 10b.

The epoxy resin and the curing agent supplied through the nozzles 12 in the units 10a, 10b and 10c are dissolved in an appropriate solvent, and if the type of the solvent is also capable of dissolving the epoxy resin and the curing agent, For example, phenol, formic acid, sulfuric acid, m-cresol, thifluoroacetone hydride / dichloromethane, water, N-methylmorpholine N-oxide, chloroform, tetrahydrofuran and aliphatic Ketones such as methyl isobutyl ketone, methyl ethyl ketone, aliphatic hydroxyl group m-butyl alcohol, isobutyl alcohol, isopropyl alcohol, methyl alcohol, ethanol, aliphatic compounds such as hexane, tetrachlorethylene, acetone, Ethylene glycol, ethylene glycol, halogen compounds such as trichlorethylene, dichloromethane, aromatic compounds toluene, xylene, aliphatic cyclic compounds Cyclohexanone, cyclohexane and ester groups such as n-butyl acetate, ethyl acetate, butyl cellosolve as aliphatic ether group, acetic acid 2-ethoxyethanol, 2-ethoxyethanol, dimethyl amide, dimethylformamide, Etc., and a plurality of kinds of solvents may be mixed and used. 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 device 100 includes a plurality of nozzle tubes 112 arranged in the longitudinal direction thereof and a spray liquid main tank 120 for supplying an epoxy resin and a curing agent to the nozzle tubes 112 ) May be provided.

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, Epoxy resin filled in the spinning liquid main tank 120 and a curing agent are supplied.

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 adjusting 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 in each of the nozzles 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i in the spinning liquid main tank 120 to supply a plurality of epoxy resins and curing agents 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i of the nozzle tubes 112a, 112b, 112c, 112d, 112h, 112i arranged in the nozzle block 111 by opening the specific supply valve 122 among the supply valves 122 The nozzle tube body 112b, 112d, 112f, 112g, 112h, 112i is supplied with an epoxy resin and a curing agent, or the specific supply valve 122 is closed and arranged in the nozzle block 111, The supply of the epoxy resin and the curing agent is stopped only to the nozzles 112a, 112c and 112e, The supply of the epoxy resin and the curing agent supplied to each of the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, and 112i is controlled and controlled.

The epoxy resin and the curing agent supplied to the respective nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i through the solution supply pipe 121 in the spinning liquid main tank 120, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i through a nozzle supply pipe 125 communicated to the supply pipe 121. The nozzles 111a,

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 epoxy resin and the curing agent supplied to the respective nozzles 111a from the nozzle supply pipe 125 by the opening and closing of the nozzle valve 126 by individually providing the nozzle valves 126 And the nozzle valve 126 is controllably connected to a control unit (not shown). Preferably, 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, the spinning amount adjusting means is composed of the nozzle valve 126. However, if it is easy to control and control the amount of radiation of the epoxy resin and the curing agent that is radiated after being supplied to the nozzle 111a from the nozzle tube 112 The radiation amount adjusting means may be configured by 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, Of the plurality of nozzle valves 126 when supplying the epoxy resin and the curing agent to the respective nozzles 111a through the respective nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, The nozzle 111a of the nozzles 111a provided in the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h and 112i is selectively opened with epoxy resin and curing agent The nozzles 111a at specific positions among the nozzles 111a provided in the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, The nozzle valve 126 selectively closes the electrification of the epoxy resin and the curing agent in the spinning liquid main tank 120, Up nozzle tube feeding of the polymer spinning solution to be supplied to the nozzles (111a) through (112a, 112b, 112c, 112d, 112e, 112f, 112g, 112h, 112i) are individually adjustable 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, 112c, 112f, 112g, 112h, 112i, and a nozzle valve 126 is provided in the nozzle supply pipe 125 to adjust the supply amount of the epoxy resin and the curing agent supplied to the nozzle tubes 112a, 112b, 112c, 112d, 112e, 112e, 112e, 112f, 112g, 112h, 112i and controlling and controlling the radiation amounts of the epoxy resin and the curing agent electrified through each nozzle 111a, The nozzle block 111 is formed by stacking nanofibers different in basis weight in the longitudinal direction of the base material 115 by an epoxy resin and a curing agent electrified by the respective nozzles 111a of the nozzles 112a, 112f, 112g, 112h, and 112i. After the nozzles 111a are arranged in the respective nozzles 111a, And nanofibers having different weights in the longitudinal direction of the base material 115 may be formed by controlling and controlling the amount of radiation of the epoxy resin and the curing agent which are controlled through the respective nozzles 111a through the above- It is not.

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. The spinning liquid main tank 8, the second transfer pipe 216, the second transfer control device 218 and the intermediate tank 220 are connected to the respective units 10a, 10b and 10c of the electrospinning device 1, And an overflow device 200 including a regeneration tank 230 are respectively provided.

Although the overflow device 200 is provided in each unit 10a, 10b, 10c of the electrospinning device 1 in the embodiment of the present invention, any one of the units 10a, 10b, 10c It is also possible that the overflow device 200 is provided in the unit 10a and the units 10b and 10c located at the rear end of the overflow device 200 are integrally connected to each other.

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, 10b and 10c is introduced into the condenser 310 and the vaporized VOC generated in the condenser 310 is supplied to the solvent storage 330. [ And pipes 311 and 331 for storing the refrigerant are connected and connected, respectively.

That is, pipes 311 and 331 for interconnecting the units 10a, 10b, and 10c 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 respective units 10a, 10b, and 10c to condense and liquefy them, A distillation unit 320 for converting the condensed VOC into a vaporized state by cooling the vaporized VOC and then cooling it to a liquefied state and a solvent storage unit 330 for storing the liquefied VOC through the distillation unit 320 .

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

That is, the respective units 10a, 10b, and 10c and the condenser 310, the condenser 310 and the distillation unit 320, and the distillation unit 320 and the solvent storage unit 330, And the pipes 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.

It is preferable that the case 18 constituting each unit 10a, 10b and 10c of the electrospinning apparatus 1 is made of a conductor, but the case 18 may be made of an insulator, The conductor and the 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, 14b, and 14c can be monitored, the abnormality of the electrospinning device 1 can be detected early, The continuous operation of the spinning device 1 for a long time is possible, the manufacture 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".

On the other hand, a temperature regulating device 60 is provided in each tube 40 of the nozzle block 11 installed in each unit 10a, 10b, 10c of the electrospinning device 1 according to the present invention, 14a, 14b, 14c.

That is, as shown in FIG. 4, a plurality of nozzles 12 provided in the respective units 10a, 10b, and 10c, (40) is provided with a temperature regulating device (60).

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, . &Lt; / 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.

As shown in Fig. 11, the auxiliary feeding for regulating the feeding speed of the long sheet 15 which is fed into and fed into each unit 10a, 10b, 10c of the electrospinning device 1 according to the present invention Device 16 is provided.

The auxiliary conveying device 16 is configured to convey the long sheet 15 so that the long sheet 15 attached by the electrostatic attraction to the collector 13 installed in each unit 10a, 10b, An auxiliary belt 16a rotating in synchronism with the speed 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 and the auxiliary belt 16a is rotated by the rotation of the auxiliary belt 16a so that the long sheet 15 is rotated by the units 10a, And one auxiliary belt roller 16b of the auxiliary belt roller 16b is rotatably connected to the motor.

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 distal end of the electrospinning device 1 is measured to be thinner than the deviation amount by the above structure, the feeding speed V (V) of the next unit 10b, 10c Or by increasing the discharge amount of the nozzle block 11 and adjusting the voltage intensity of the voltage generating devices 14a, 14b and 14c 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 distal 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 or 10c is increased, The discharge amount of the nozzle block 11 is reduced and the intensity of the voltage of the voltage generating devices 14a, 14b, and 14c is adjusted to reduce the discharge amount of the nanofibers per unit area to reduce the amount of lamination, As a result, a nanofiber filter having a uniform 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 to the long sheet 15 having the nanofiber filter laminated thereon, and the time for which the ultrasonic signals of the longitudinal wave and the transverse wave move back and forth on the elongate sheet 15, A predetermined calculation using the propagation time of the longitudinal waves and the transverse waves and the propagation speed of longitudinal waves and transverse waves at the reference temperature of the elongate sheet 15 in which the nanofiber filters are stacked and the temperature constants of longitudinal waves and transverse wave propagation velocities Is a thickness measuring apparatus using an ultrasonic longitudinal wave and a transverse wave to calculate the thickness of the object from the equation.

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 precisely measure the thickness by self-compensating for the error caused by the change, and it is possible to measure the thickness accurately even if there is any type of temperature distribution inside the nanofiber filter.

Meanwhile, the thickness of the nanofiber filter of the elongated 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, The elongated sheet conveying speed regulating device 30 for regulating the conveying speed of the long sheet 15 is further provided on the electrospinning device 1. The thickness measuring device 70 controls the conveying speed of the long sheet 15,

The elongated sheet conveying speed regulating device 30 is provided on a buffer zone 31 formed between the units 10a, 10b and 10c of the electrospinning device 1 and on the buffer zone 31 A pair of supporting rollers 33 and 33 'for supporting the long sheet 15 and an adjusting roller 35 provided between the pair of supporting rollers 33 and 33'.

At this time, the support rollers 33 and 33 'are moved in the direction of conveyance of the long sheet 15 in which the nanofiber filters are laminated by the spinning solution injected by the nozzles 12 in the respective units 10a, 10b and 10c For supporting the conveyance of the elongate sheet 15 and provided at a line and a rear end of a buffer zone 31 formed between the units 10a and 10b.

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 conveying speed and the moving time of the long sheets 15a, 15b, 15c (not shown) for each unit 10a, 10b, 10c are adjusted.

For this purpose, a detection sensor (not shown) for detecting the feeding speed of the long sheets 15a, 15b, 15c (not shown) in the units 10a, 10b, 10c is provided, A main control unit 7 is provided for controlling the movement of the adjusting roller 35 in accordance with the feeding speed of the long sheets 15a, 15b and 15c (not shown) in the respective units 10a, 10b and 10c.

In an embodiment of the present invention, the conveying speed of the long sheets 15a, 15b, 15c (not shown) is sensed in each of the units 10a, 10b, 10c and the conveying speed of the long sheets 15a, The auxiliary belt 16a or the auxiliary belt 16b provided outside the collector 13 for transferring the long sheets 15a and 15b may be configured to control the movement of the regulating roller 35 according to the speed. (Not shown) that drives the auxiliary belt roller 16b or the motor (not shown) that drives the regulating roller 16a, and the control unit controls the movement of the regulating roller 35 accordingly.

With the structure as described above, the sensing speed of the long sheet 15a in the unit 10a in which the sensing sensor is positioned at the front end of each unit 10a, 10b, 13 to 14, in order to prevent the elongated sheet 15a fed in the unit 10a located at the leading end from being sagged, And the adjustment roller 35 which is provided between the pair of support rollers 33 and 33 'and on which the long sheet 15 is wound is moved downward, and the unit (10a) 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 buffer units 10a and 10b is excessively conveyed to the buffer zone 31 located between the units 10a and 10b The feeding speed of the long sheet 15a in the unit 10a positioned at the leading end of the pulling and the feeding speed Thereby preventing sagging and wrinkling of the long sheet 15a while correcting and controlling so that the conveying speed of the long sheet 15b in the unit 10b located at the rear end becomes the same.

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, the air permeability of the nanofiber filter manufactured through the electrospinning device 1 is measured at the rear of the unit 10c located at the rearmost end of each unit 10a, 10b, 10c of the electrospinning device 1 A ventilation rate measuring device 80 is provided.

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

When the air permeability of the nanofiber nonwoven fabric discharged through each of the units 10a, 10b and 10c of the electrospinning device 1 is measured to a large extent, the feeding speed V of the units 10b and 10c positioned at the rear end portion, 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 so as to reduce the air permeability.

When the air permeability of the nanofiber filter discharged through the units 10a, 10b and 10c of the electrospinning device 1 is measured to be small, the feeding speed V of the units 10b and 10c positioned at the rear end is measured, The discharge amount of the nozzle block 11 is reduced and the voltage of the voltage generating devices 14a, 14b and 14c is controlled to reduce the discharge amount of the nanofibers per unit area to reduce the amount of lamination, .

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

If the degree of air permeability P of the nano-fiber filter is less than the predetermined value, the feed speed V is not changed from the initial value. If 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 nanofiber filters electrified through the respective units 10a, 10b and 10c of the electrospinning apparatus 1 is provided at the rear end of each of the units 10a, 10b and 10c And performs a post-process of the nanofiber filter which is provided behind the unit 10c located in the vicinity of the unit 10c and is electrospun through the electrospinning device 1 by the laminating device 90. [

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

1 is a side view schematically showing an electrospinning apparatus of the present invention.

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 the embodiment of the present invention, three units 10a, 10b and 10c of the electrospinning device 1 are provided, but the number of the units 10a, 10b and 10c is three or more But is not limited thereto.

Each of the units 10a, 10b and 10c of the electrospinning device 1 has 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 which is sprayed with a spraying liquid filled in each of the solution main tanks 8, (14a, 14b, 14c) 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 spinning liquid sprayed from the nozzle (12) Lt; / RTI >

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 the nanofibers are stacked on the collector 13, .

To this end, each unit 10a, 10b, 10c of the electrospinning device 1 is made up of spinning solution units 10a, 10b, 10c, and a nozzle block (not shown) in the spinning solution units 10a, 10b and 10c in which the curing agent is electrospun in the nozzle block 11 in the spinning liquid unit 10b positioned at the rear end of the electrospinning apparatus 1 is sprayed from the electrospinning apparatus 1, And the epoxy resin and the curing agent are sprayed onto the collector 13, respectively.

The nozzle block 11 installed in each of the units 10a, 10b and 10c is connected to a solution main tank 8 filled with a spinning solution.

In an embodiment of the present invention, the nozzle blocks 11 installed in the respective units 10a, 10b, 10c are individually connected to a corresponding number of the solution main tanks 8 to supply the spinning solution However, it is also possible that each of the units 10a, 10b, and 10c is connected to one solution main tank 8 to be supplied with the spinning solution.

Here, the unit 10a is provided in front of the unit 10a located at the foremost end among the units 10a, 10b and 10c of the electrospinning device 1, and the nanofibers are injected by the electrospinning of the spinning liquid. A substrate 15 on which nanofibers are laminated is provided on the rear side of a unit 10c positioned at the rear end of each unit 10a, 10b, 10c Up roller 5 for winding is provided.

The substrate 15 to be fed and fed through the feed roller 3 is conveyed to each of the units 10a, 10b and 10c of the electrospinning device 1 to the take-up roller 5 side, 15) for controlling the conveying speed of the sheet.

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

A laminating device 90 for laminating the nanofibers electrospun on the base material 15 through the respective units 10a, 10b and 10c of the electrospinning device 1 is provided in each of the units 10a, 10b, 10b and the unit 10c located at the rear end of the nano-fiber filter 10c, and performs post-processing of the nanofiber filter electrospun through the electrospinning device 1 by the laminating device 90. [

As described above, the base material 15 on which the spinning solution is electrospun and the nanofibers are laminated while passing through the units 10a, 10b and 10c of the electrospinning device 1 is preferably a polyethylene terephthalate base material .

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

The spinning solution supplied through the nozzle 12 in each of the units 10a, 10b, and 10c is a solution in which a polymer, which is a synthetic resin material capable of electrospinning, is dissolved in an appropriate solvent. But is not limited to, 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 pipe 216, the second transfer control device 218, and the intermediate tank 220 is connected to each unit 10a, 10b, 10c of the electrospinning device 1, And an overflow device 200 having a configuration including a regeneration tank 230 are respectively provided.

Although the overflow device 200 is provided in each unit 10a, 10b, 10c of the electrospinning device 1 in the embodiment of the present invention, any one of the units 10a, 10b, 10c It is also possible that the overflow device 200 is provided in the unit 10a and the remaining units 10b and 10c are 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, 10b, and 10c stores the polymer spinning solution to be a raw material of the nanofiber. 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 polymeric spinning solution to the nozzle block 12 provided in the nozzles 10a, 10b, 10c and measuring the height of the liquid level of the supplied polymeric spinning 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, a method for producing a nanofiber filter including the polyethylene terephthalate base material and the epoxy resin-curing agent nanofiber of the present invention will be described using the electrospinning device.

In the present invention, three units 10a, 10b, and 10c are used in the electrospinning apparatus, and an epoxy resin and a curing agent are used as the polymer.

First, an epoxy resin solution in which an epoxy resin is dissolved in an organic solvent is supplied to a spinning liquid main tank 8 connected to the first and third units 10a and 10c of an electrospinning apparatus, and a solution of a hardener, which dissolves the hardener in an organic solvent, The epoxy resin solution and the curing agent solution supplied to the spinning solution main tank 8 are supplied to the spinning solution main tank 8 connected to the second unit 10b of the spinning device through a metering pump Is supplied continuously and quantitatively to the plurality of nozzles 12 of the nozzle block 11 to which the nozzle block 11 is applied. The epoxy resin solution and the curing agent solution supplied from the respective nozzles 12 are electrospun and converged on the collector 13 having a high voltage through the nozzle 12 to laminate the epoxy resin nanofiber and the curing agent nanofiber . In the units 10a, 10b and 10c of the electrospinning device 1, the epoxy resin nanofibers are wound around the feed roller 3 driven by the driving of a motor (not shown) and the rotation of the feed roller 3 Is transferred from the first unit 10a to the second unit 10b and the second unit 10c by the rotation of the auxiliary transfer device 16 driven by the first transfer unit 16 and is repeatedly carried out on the collector 13 The epoxy resin nanofiber and the hardener nanofiber are successively electrospun and laminated.

In the process of electroluminescence of the solution onto the collector 13 to form a laminate, the first and third units 10a and 10c are irradiated with epoxy resin (10a, 10b, 10c) The nanofibers are laminated and the hardener nanofibers are successively laminated in the second unit 10b.

In addition, three or more layers of epoxy resin and curing agent nanofibers having different fiber diameters and having different numbers of units of the above-mentioned electrospinning device 1 are formed on the collector 13 It would also be possible to produce nanofiber filters.

In the first unit 10a, the epoxy resin solution is electrospun on the polyethylene terephthalate substrate 13 to form a first nanofiber layer, which is an epoxy resin nanofiber. In the second unit 10b, And a second nanofiber layer as a hardening agent nanofiber is laminated by electrospinning a solution of a hardener on the resin nanofibers. In the third unit 10c, an epoxy resin solution is electrospun on the second nanofiber layer to form an epoxy resin nanofiber It is possible to produce the nanofiber filter of the present invention through the process of forming the third nanofiber layer and then heat-sealing.

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 One

A spinning solution prepared by dissolving an epoxy resin in a solvent of DMAc (N, N-dimethylaceticamide) in an amount of 15% by weight was charged into the spinning liquid main tank of the first unit and the third unit, and the amine curing agent was dissolved in DMAc dimethylaceticamide in a concentration of 15% by weight in the solvent so that the concentration of 15% by weight was added to the spinning liquid main tank of the second unit.

In the first unit of the electrospinning device, an epoxy resin spinning solution was electrospun on a polyethylene terephthalate substrate 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 50 캜 to obtain a first A nanofiber layer was formed. In the second unit, the amine hardener solution was electrospun at a distance of 40 cm between the electrode and the collector at an applied voltage of 20 kV and a temperature of 70 ° C to form a second nanofiber layer having a basis weight of 3 g / m 2 on the first nanofiber layer Respectively. In the third unit, the third nanofiber layer having a basis weight of 3 g / m < 2 > was formed by lamination of an epoxy resin solution 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 70 DEG C, A nanofiber filter was fabricated.

Comparative Example One

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 properties of the nanofiber filters prepared in Example 1 and Comparative Example 1 were measured by the following methods. 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 nanofiber filter manufactured by the embodiment of the present invention has improved water pressure and air permeability of at least 50% compared to 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: a second spinning solution main tank, 120c: a third spinning solution main tank,
121: solution supply pipe, 121a: first supply pipe,
121b: second supply pipe, 121c: third supply pipe,
122: supply valve, 125: nozzle supply pipe,
126: Nozzle valve.

Claims

A polyethylene terephthalate substrate;
A first nanofiber layer formed by electrospinning an epoxy resin solution on the polyethylene terephthalate substrate;
A second nanofiber layer laminated by electrospinning a curing agent solution on the first nanofiber layer; And
And a third nano fiber layer formed by electrospinning an epoxy resin solution on the second nano fiber layer,
Wherein the first nanofiber layer, the second nanofiber layer, and the third nanofiber layer have different weights in the longitudinal direction or in the transverse direction.

The method according to claim 1,
Wherein the epoxy resin solution and the curing agent solution are electrospun through a temperature controller at a temperature of 50 to 100 ° C.

The method of claim 2,
Wherein the viscosity of the epoxy resin solution and the curing agent solution is controlled to 1,000 to 3,000 cps through the temperature controller.

delete

4. The method according to any one of claims 1 to 3,
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.